U.S. patent application number 13/898263 was filed with the patent office on 2013-09-26 for eyeglass earstem with enhanced performance.
This patent application is currently assigned to Oakley, Inc.. The applicant listed for this patent is Oakley, Inc.. Invention is credited to Neil Ferrier, Steven Ogren, Carlos D. Reyes, Peter K. Yee.
Application Number | 20130250231 13/898263 |
Document ID | / |
Family ID | 43822937 |
Filed Date | 2013-09-26 |
United States Patent
Application |
20130250231 |
Kind Code |
A1 |
Yee; Peter K. ; et
al. |
September 26, 2013 |
EYEGLASS EARSTEM WITH ENHANCED PERFORMANCE
Abstract
An enhanced performance earstem for eyeglasses is provided that
can incorporate one or more flex zones or points along the length
of the earstem. In some embodiments, the earstem can comprise an
elongate body having an anterior end and a posterior end and at
least a first segment and a second segment on the body having a
first flex zone or point disposed at least partially therebetween.
A center of the first flex zone or point can be within a given
range from the anterior end. Further, some embodiments can provide
differential flexibility along the length of the earstem. For
example, the body of the earstem can have plurality of relatively
flexible zones, and each flexible zone can be separated from an
adjacent flexible zone by a relatively rigid zone. In this regard,
the relatively flexible zones can have different stiffnesses.
Inventors: |
Yee; Peter K.; (Irvine,
CA) ; Ferrier; Neil; (Foothill Ranch, CA) ;
Ogren; Steven; (Yorba Linda, CA) ; Reyes; Carlos
D.; (Rancho Santa Margarita, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Oakley, Inc. |
Foothill Ranch |
CA |
US |
|
|
Assignee: |
Oakley, Inc.
Foothill Ranch
CA
|
Family ID: |
43822937 |
Appl. No.: |
13/898263 |
Filed: |
May 20, 2013 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
12572881 |
Oct 2, 2009 |
8444265 |
|
|
13898263 |
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Current U.S.
Class: |
351/114 ;
351/119 |
Current CPC
Class: |
G02C 2200/26 20130101;
G02C 5/16 20130101; G02C 5/2227 20130101; G02C 5/2209 20130101;
G02C 2200/22 20130101; G02C 5/2254 20130101; G02C 5/14
20130101 |
Class at
Publication: |
351/114 ;
351/119 |
International
Class: |
G02C 5/16 20060101
G02C005/16; G02C 5/14 20060101 G02C005/14 |
Claims
1. An enhanced performance earstem for eyeglasses, comprising: an
elongate body, having an anterior end and a posterior end; and at
least a first segment and a second segment on the body, separated
by a flex zone or point; wherein a center of the flex zone or point
is within the range of from about 20 mm to about 70 mm from the
anterior end of the elongate body.
2. An enhanced performance earstem as in claim 1, wherein the first
segment and the second segment are separated at the flex zone or
point by a first gap, and wherein deflection of the earstem at the
flex zone or point changes a width of the first gap.
3. An enhanced performance earstem as in claim 2, wherein
deflection of the earstem is operative to reduce the first gap such
that the first segment and the second segment contact each other to
prevent further deflection of the earstem.
4. An enhanced performance earstem as in claim 3, wherein the
earstem is operative to deflect at the flex zone or point until the
first segment contacts the second segment.
5. An enhanced performance earstem as in claim 4, wherein the first
gap separates the first segment and the second segment such that
the first segment and the second segment do not touch when the
earstem is in an undeflected position.
6. An enhanced performance earstem as in claim 1, wherein the
elongate body deflects relative to at least a portion of one of the
first and second segments.
7. An enhanced performance earstem as in claim 6, wherein one of
the first and second segments comprises a recess configured to
receive at least a portion of the elongate body for allowing
deflection of the elongate body relative to the respective one of
the first and second segments.
8. An enhanced performance earstem as in claim 7, wherein the
recess comprises a contact surface configured to at least partially
abut the elongate body for constraining deflection of the elongate
body.
9. An enhanced performance earstem as in claim 1, further
comprising another flex zone or point, the other flex zone or point
being disposed between about 30 mm to about 70 mm from the anterior
end.
10. An enhanced performance earstem as in claim 9, wherein the
other flex zone or point comprises the posterior end of the
elongate body of the earstem.
11. An enhanced performance earstem as in claim 1, wherein the
first segment and the second segment are disposed externally along
the elongate body.
12. An enhanced performance earstem as in claim 1, wherein the
first segment and the second segment are formed separately from and
coupled to the elongate body of the earstem.
13. An enhanced performance earstem as in claim 1, wherein the
first segment and the second segment are generally rigid relative
to the elongate body.
14. An earstem having differential flexibility, comprising: a
flexible, elongate body having an anterior end and a posterior end,
the body having a plurality of relatively flexible zones, each
flexible zone separated from an adjacent flexible zone by a
relatively rigid zone; wherein the relatively flexible zones have
different stiffnesses.
15. An earstem as in claim 14, wherein the stiffness of a first
relatively flexible zone is greater than the stiffness of a second
relatively flexible zone to provide progressive deflection of the
earstem upon exertion of bending stress on the earstem.
16. An earstem as in claim 15, wherein the first relatively
flexible zone is disposed anteriorly relative to the second
relatively flexible zone.
17. An earstem as in claim 14, wherein the first relatively
flexible zone finishes deflecting before the second relatively
flexible zone finishes deflecting.
18. An earstem as in claim 14, further comprising at least one
segment attached to the elongate body, the segment configured to
constrain deflection of the elongate body along at least a portion
of the elongate body to form the relatively rigid zone.
19. An earstem for providing an adjustable and personalized fit for
an eyeglass, the earstem comprising: an elongate body defining an
anterior end being attachable to the eyeglass and a posterior end
extending rearwardly from the eyeglass; and at least a first
segment disposed along the earstem, the first segment comprising a
contact surface, the contact surface being positioned adjacent to
the elongate body such that deflection of the elongate body causes
relative movement between the contact surface and the elongate
body, the contact surface being configured to constrain deflection
of the elongate body upon contact between the contact surface and
the elongate body, the contact surface permitting relative movement
between the first segment and the elongate body within a given
range.
20. An eyeglass for providing enhanced retention on the head of a
wearer, the eyeglass comprising: a frame for supporting at least
one lens in the wearer's field of view; a pair of earstems attached
to the frame for supporting the frame on the head of the wearer,
each earstem comprising at least first and second flex zones or
points whereat the earstems can bend, the first flex zone or point
providing a first degree of deflection, the second flex zone or
point providing a second degree of deflection; wherein the first
degree of deflection is different from the second degree of
deflection such that the earstems provide progressive bending along
a longitudinal axis of the earstems for providing a secure and
conforming fit over a range of head sizes.
21. An eyeglass as in claim 20, wherein the first degree of
deflection defines a stiffness of the first flex zone or point and
the second degree of deflection defines a stiffness of the second
flex zone or point.
22. An eyeglass as in claim 20, wherein the first degree of
deflection defines a maximum deflection of the earstem about the
first flex zone or point and the second degree of deflection
defines a maximum deflection of the earstem about the second flex
zone or point.
23. An eyeglass as in claim 22, wherein the earstems comprise a
plurality of segments being interconnected at the first and second
flex zones or points, the maximum deflection of the earstem at a
given flex zone or point being limited by physical contact of
adjacent segments at the given flex zone or point during deflection
of the earstem at the given flex zone or point.
24. An eyeglass as in claim 20, wherein the earstems each comprise
a plurality of rigid segments with at least one segment extending
generally between the first flex zone or point and the second flex
zone or point of each earstem.
25. An eyeglass as in claim 24, wherein the rigid segments are
removably attachable to the earstems.
26. An eyeglass as in claim 25, wherein the rigid segments comprise
contact surfaces that are disposed adjacent to each other at the
first and second flex zones or points, each earstem being
configured such that deflection of the earstem is limited upon
abutment of the contact surfaces of the adjacent segments.
Description
RELATED APPLICATION INFORMATION
[0001] The present application is a continuation of U.S. patent
application Ser. No. 12/572,881, filed Oct. 2, 2009, the entirety
of which is hereby incorporated by reference herein.
BACKGROUND
[0002] 1. Field of the Inventions
[0003] The present disclosure relates generally to earstems for
eyewear. More specifically, the present disclosure relates to
methods and apparatuses for providing improved fit for eyewear.
[0004] 2. Description of the Related Art
[0005] A wide variety of improvements have been made in recent
years in the eyewear field, particularly with respect to eyewear
intended for use in active sports or as fashion sunglasses. These
eyewear designs accomplish a variety of functional advantages, such
as maximizing interception of peripheral light, reducing optical
distortion and increasing the wearer's comfort level, compared to
previous active sport eyewear.
[0006] Lens geometry has also been the subject of a variety of
innovations. The unitary lens of the Blades.RTM. eyewear
incorporates the cylindrical geometry disclosed, for example, in
U.S. Pat. No. 4,859,048, issued to Jannard. This geometry allows
the lens to closely conform to the wearer's face and intercept
light, wind, dust, etc. from directly in front of the wearer
(anterior direction) and peripherally (lateral direction). See also
U.S. Pat. No. 4,867,550 to Jannard (toroidal lens geometry).
[0007] In another important areas, eyeglass fit and comfort has
generally been addressed by varying eyeglass frame size, minimizing
eyeglass weight, modifying the manner in which earstems engage ears
of the wearer, and utilizing nosepiece and ear-contacting materials
that are comfortable for extended use, to name a few.
[0008] Eyeglass fit and comfort has been determined at least in
part due to the material of which the eyeglass is made. For
example, plastic or injection molded frame eyeglasses are often
more flexible than metal frame eyeglasses, and therefore could
provide lighter overall weight and greater flexibility than a metal
frame eyeglass. Although metal frame eyeglasses have been improved
in some ways, such as incorporating a spring overextension feature
into the hinge connection of the earstem with the frame, the spring
overextension feature is primarily useful in facilitating placement
and mounting of the eyeglass on the head of the wearer. Such
features may have moderately improved the flexibility and fit of
plastic and metal frame eyeglasses; however, rigid frames and
earstems do not provide any dynamic adjustment or flexibility. As
such, prior art eyeglass designs do not adjust well over a range of
head sizes and shapes.
SUMMARY
[0009] As noted above, one of the important areas for improvement
in eyeglass designs is the area of improving the fit and comfort of
the eyeglass. Various eyewear designs have been provided which
reduce the weight of the eyeglass, allow the wearer to customize
the fit of the eyeglass, or otherwise seek to alleviate pressure
and discomfort during use. However, despite the many advances that
have been made, there remains a need for a self-customizing eyewear
design that can be worn on a variety of head sizes and shapes and
eliminate lateral pressure on the temples. Further, there remains a
need for a tunable earstem design that adjusts geometrically along
its length to a corresponding head size and shape. In addition,
there remains a need for an earstem design that enhances retention
and performance of the eyeglass.
[0010] In particular, according to at least one of the embodiments
disclosed herein is the realization that metal frame eyeglasses
only provide limited adjustability for a wearer and usually do not
achieve an optimal fit over a range of different head sizes and
shapes. Although it is noted above that some prior art metal frame
eyeglasses provide a spring overextension feature at the earstem
hinge, the spring overextension feature is generally the only
flexible part of the eyeglass because the earstems of metal frame
eyeglasses are usually rigid. As such, a given metal frame eyeglass
size may comfortably fit onto a narrow head and make it easier for
a user to put the eyeglasses on. However, such an eyeglass
generally has only a limited range of adjustability and flexibility
and therefore only fits a very narrow range of head sizes and
shapes.
[0011] Therefore, in accordance with at least one of the
embodiments disclosed herein is the realization that metal frame
eyeglasses can be improved by modifying the earstems such that the
earstems exhibit flexural properties similar to those exhibited by
a plastic or injection molded earstem. Further, some embodiments
provide for a metal earstem that comprises one or more flex zones
or points that allow the earstem to adjust to the natural and
variable shape of a variety of head sizes and shapes.
[0012] Regardless of the material, some embodiments of the earstem
can comprise one or more flex zones or points. The flex zones or
points can be strategically configured to allow the earstem to
provide a natural, versatile fit over a range of head shapes and
sizes. For example, a first flex zone can extend along an initial
anterior portion of the earstem, a second flex zone can extend
along a middle portion of the earstem, and a third flex zone can
extend along the anterior portion of the earstem. In particular,
some embodiments are configured such that the first and second flex
zones extend generally along an anterior half of the earstem while
the third flex zone extends along a posterior half of the earstem.
Further, some embodiments can be configured such that the number of
flex zones or points is distributed evenly along the earstem. For
example, three flex zones or points could be distributed along the
anterior portion, the middle portion, and along the posterior
portion of the earstem. The number of flex zones and locations of
the same can be varied as desired.
[0013] The present disclosure enables the modification and
adaptation of these principles to a variety of earstem shapes,
sizes, and applications.
[0014] It is noted that although some embodiments are discussed as
being made from metal, any of the embodiment disclosed herein can
be made of metal, plastic, and/or composite materials. Thus,
although many of the embodiments provide an effective solution to
providing a metal earstem with enhanced performance, embodiments
can also be made of plastic, composite, or combinations of
materials.
[0015] Further, some embodiments can provide an earstem that uses a
flexible spine or backbone and a motion-limiting apparatus. In some
embodiments, the motion limiting apparatus can comprise one or more
segments or components that are attached to or formed integrally or
monolithically with the spine.
[0016] In some embodiments, the motion limiting apparatus can
operate to limit motion of the spine through interference or
contact between portions of the segment against the spine during
deflection of the spine. For example, a segment can comprise a
pocket or an area of relief into which the spine can deflect until
contacting a bottom surface of the pocket or area of relief,
thereby limiting motion of the spine. Further, in some embodiments,
the motion limiting apparatus can operate to limit motion of the
spine through interference or contact between adjacent segments.
For example, the spine can deflect until adjacent segments are
brought into contact with each other in such a manner than further
deflection of the spine is prevented. These embodiments, and
various other embodiments, are described and illustrated further
herein.
[0017] Accordingly, the present inventions relate to a variety of
earstem configurations that provide enhanced performance. The
earstem can comprise at least one flexible portion and at least one
relatively rigid portion that can each be modified to control one
or more characteristics of the deflection of the earstem. Some of
the characteristics of the deflection of the earstem can include
the range of deflection, the number of deflection zones or points,
the stiffness of the earstem, the deflection mode, and the
structural constraints, to name a few. As a result, some of the
embodiments disclosed herein can be implemented to provide an
eyeglass that provides a customized to fit regardless of the
wearer's head size or shape.
[0018] Some embodiments disclosed herein provide an eyeglass
comprising a frame and an earstem attached to the frame. In some
embodiments, the earstem can be fixedly attached to the frame. For
example, the earstem may be formed monolithically with the frame or
include a flexible point that allows limited movement of the
earstem relative to the frame while preventing the earstem from
being fully pivoted inwardly towards the frame to a stowed
position.
[0019] In other embodiments, the earstem can be hingedly attached
to the frame at a hinge joint that allows the earstem to be pivoted
inwardly towards the frame to the stowed position. Hinge joint
articulation may be limited by the flexibility and/or structure of
the earstem. The hinge joint can be pretensioned or biased towards
a given position. In embodiments wherein the earstem can be moved
to a stowed position, the earstem can likewise be configured such
that this joint allows flexibility from a deployed position in
order to adjust for large or small head sizes and shapes.
[0020] Optionally, the earstem can include a plurality of discrete,
flexible zones or points. Each of the zones or points can provide a
degree of deflection for the earstem. Further, the arrangement and
placement of the zones or points along the earstem can be
configured to optimize the manner in which an earstem adjusts to a
given head size and shape. In this regard, one or more flexible
zones or points can be provided at one or more locations along the
length of the earstem in a manner such that the earstem can be
interchangeably worn and adjusted to a variety of head sizes and
shapes while providing superior comfort and retention.
[0021] Further, in some embodiments, the earstem can optionally
comprise a plurality of discrete segments or zones whereat the
earstem is inflexible that are separated by a flexible zone or
point. The length, geometry, and size of the segments can vary and
may be configured to influence and/or control the motion,
flexibility, and/or function of the earstem. For example, in some
embodiments, the earstem can provide differential flexibility. In
addition, in some embodiments, the earstem can provide a maximum
range of movement or bending that is limited or controlled by
interference between components of the earstem, such as the
segments or spine or backbone of the earstem. For example, in some
embodiments, the earstem can provide a range of motion that is
limited by interference between a spine or backbone and a component
of the earstem, such as a segment. The segment can comprise a
pocket or area of relief into which the spine or backbone can
deflect until contacting a bottom surface of the pocket or area of
relief, which can then serve to prevent further deflection of the
spine or backbone. In addition or in the alternative, the earstem
can provide a range of motion that is limited by interference
between segments of the earstem that contact each other such that
further deflection is prevented due to interference or lack of
clearance between segments of the earstem. Thus, in some
embodiments, the displacement of components of the earstem can be
limited at least partially due to interference between one or more
components of the earstem.
[0022] Some embodiments provide for an earstem that comprises a
metal spine and a plurality of segments that are attached to the
spine. The metal can be titanium in some implementations. The
segments can be fastened to the spine using fastening means such as
mechanical fasteners including screws, bolts, etc. or other
fastening means such as welding, adhesives, etc. The segments can
be separated from each other along the spine. In some embodiments,
one or more flex zones or points can be created along the spine.
For example, a flex zone or point can be disposed between the spot
at which the spine attaches to a frame of an eyeglass and the spot
at which the spine attaches to a first segment disposed adjacent to
the frame. Another flex zone or point can be disposed between
another spot at which the spine attached to the first segment and a
spot at which the spine attaches to a second segment. Further, yet
another flex zone can be disposed along a tail, free end, or
posterior end of the spine. In such embodiments, one or more of the
segments can comprise a pocket or area of relief into which the
spine can deflect until contacting a bottom surface of the pocket
or area of relief, which can then serve to prevent further
deflection of the spine. In addition or in the alternative, the
earstem can provide a range of motion that is limited by
interference between the frame and the first segment that contact
each other, and/or the first and second segments of the earstem
that contact each other, such that further deflection is prevented
due to interference or lack of clearance between the first segment
and the frame and/or between the first and second segments of the
earstem.
[0023] Moreover, in some embodiments, the earstem can be configured
to provide an undeflected position and one or more deflected
positions. In such embodiments, the earstem can comprise one or
more flexible zones or points and be configured such that one or
more flexible zones or points are activated upon movement from the
undeflected position to a deflected position or upon movement from
a given deflected position to another give a deflected
position.
[0024] Furthermore, in some embodiments, the earstem can be
configured to comprise a uniquely configured hinge joint assembly
that can be formed when the earstem is hingedly coupled to a frame
of an eyeglass. For example, an anterior portion of the earstem can
comprise a cam configured to bias the earstem in one of an open or
deployed position and a closed or stowed position. In some
embodiments, the cam can comprise a washer and a protrusion on the
anterior portion of the spine that engages protrusions or recesses
of the washer to be urged toward one or more rotational
positions.
[0025] In some embodiments, the anterior portion of the spine can
be split into upper and lower members. In such embodiments, the cam
of the hinge joint assembly can be disposed at the lower member of
the anterior portion of the spine. Further, by action of the cam,
the upper and lower members of the anterior portion of the spine
can be urged together when the earstem is moved away from the open
position or away from the closed position. In this regard, the
spine can be configured such that the urging together or deflection
of the upper and lower members is a movement that is generally
elastically resisted. Thus, when possible, the separation force of
the upper and lower members will cause the earstem to be biased
toward either the open position or the closed position. In
addition, some embodiments can include a spring that acts as an
assist to the separation force of the upper and lower members to
urge them apart. In this manner, an initial force can be required
to move the earstem from either the open or closed position, but as
the earstem is pivoted, the cam action of the joint will cause that
the earstem is naturally drawn into the other one of the open or
closed position as it moves toward such position.
[0026] In accordance with an embodiment, an enhanced performance
earstem is provided for eyeglasses. The earstem can comprise an
elongate body and at least a first segment and a second segment on
the body. The elongate body can have an anterior end and a
posterior end. The first segment and the second segment can be
separated by a flex zone or point. Further, a center of the flex
zone or point can be within the range of from about 20 mm to about
70 mm from the anterior end of the elongate body. In some
implementations, the center of the flex zone can be within the
range of from about 25 mm to about 45 mm from the anterior end of
the elongate body
[0027] In some implementations, the elongate body can deflect
relative to at least a portion of one of the first and second
segments. For example, one of the first and second segments can
comprise a recess configured to receive at least a portion of the
elongate body for allowing deflection of the elongate body relative
to the respective one of the first and second segments. Further,
the recess can comprise a contact surface configured to at least
partially abut the elongate body for constraining deflection of the
elongate body. A recess can be formed along one of the posterior
and anterior portions of a given segment. It is also contemplated
that a given segment can comprise a pair of recesses separated by
an attachment zone whereat the elongate body attaches to the given
segment.
[0028] Some implementations can also be provided wherein the first
segment and the second segment are separated at the flex zone or
point by at least a first gap. In this regard, deflection of the
earstem at the flex zone or point can change a width of the first
gap. For example, deflection of the earstem can be operative to
reduce the first gap such that the first segment and the second
segment contact each other to prevent further deflection of the
earstem. The earstem can be configured to deflect at the flex zone
or point until the first segment contacts the second segment. In
some implementations, the earstem can be configured such that the
first gap can separate the first segment and the second segment
such that the first segment and the second segment do not touch
when the earstem is in an undeflected position.
[0029] Optionally, the earstem can also be configured such that the
flex zone or point can permit relative angular deflection of the
first segment relative to the second segment within the range of
from about 5.degree. to about 40.degree.. Further, the range can be
within about 10.degree. to about 20.degree.. In some embodiments,
the earstem can further comprise another flex zone or point, and
the other flex zone or point can be disposed within the range of
between about 30 mm to about 70 mm from the anterior end. Further,
the other flex zone or point can be disposed within the range of
between about 40 mm to about 60 mm from the anterior end, and in
some cases, about 50 mm from the anterior end.
[0030] In some embodiments, the earstem can comprise three flex
zones or points extending along the earstem. The flex zones may be
separated from by one a relative rigid zone or point. It is also
contemplated that the earstem can comprise four or more flex zones
or points.
[0031] In some implementations, the first segment and the second
segment can be disposed externally along the elongate body. The
earstem can also be configured such that the first segment and the
second segment can be formed separately from and coupled to the
elongate body of the earstem. Moreover, the earstem can also be
configured such that the first segment and the second segment can
be generally rigid relative to the elongate body.
[0032] In another embodiment, an earstem is provided that can have
differential flexibility. The earstem can comprise a flexible,
elongate body having an anterior end and a posterior end. The body
can have a plurality of relatively flexible zones. Each flexible
zone can be separated from an adjacent flexible zone by a
relatively rigid zone. Further, the relatively flexible zones can
have different stiffnesses.
[0033] Some implementations of the earstem can be provided in which
the stiffness of a first relatively flexible zone is greater than
the stiffness of a second relatively flexible zone to provide
progressive deflection of the earstem upon exertion of bending
stress on the earstem. Further, the first relatively flexible zone
can be disposed anteriorly relative to the second relatively
flexible zone.
[0034] In some aspects, the earstem can be configured such that the
first relatively flexible zone can finish deflecting before the
second relatively flexible zone finishes deflecting. In this
regard, the first relatively flexible zone can deflect prior to
deflection of the second relatively flexible zone or both zones can
deflect simultaneously.
[0035] Further, the elongate body, the rigid zones, and the
flexible zones can be monolithically formed. Additionally, the
earstem can be configured to further comprise an insert within the
elongate body. The insert can comprise at least first and second
relatively rigid segments separated by a relatively flexible zone.
The earstem can optionally be configured such that the elongate
body is comolded with the insert. Furthermore, the earstem can be
configured such that at least one dimension of the elongate body
remains generally constant between the anterior end and the
posterior end of the earstem.
[0036] In accordance with some implementations, the earstem can be
configured such that the relatively rigid zones each comprise at
least one elongate segment. The relatively flexible zones can
comprise at least one interconnector extending intermediate the
elongate segments to interconnect the elongate segments in a
general end-to-end manner to form at least first and second flex
zones or points. Additionally, the elongate segments of the
relatively rigid zones can be formed monolithically with each other
and with the interconnectors of the relatively flexible zones.
[0037] In accordance with another embodiment, an earstem is
provided that can be configured to provide an adjustable and
personalized fit for an eyeglass. The earstem can comprise an
elongate body and at least a first segment. The elongate body can
define an anterior end that can be attached to the eyeglass and a
posterior end that can extend rearwardly from the eyeglass. The at
least first segment can be disposed along the earstem. The first
segment can comprise a contact surface, and the contact surface can
be positioned adjacent to the elongate body such that deflection of
the elongate body causes relative movement between the contact
surface and the elongate body. The contact surface can be
configured to constrain deflection of the elongate body upon
contact between the contact surface and the elongate body. The
contact surface can permit relative movement between the first
segment and the elongate body within a given range.
[0038] In some embodiments, the first segment can comprise another
contact surface. Further, the contact surfaces can be separated by
an attachment point whereat the first segment is coupled with the
elongate body. Optionally, the earstem can comprise a second
segment having a contact surface. Similar to the first segment, the
second segment can be coupled to the elongate body such that the
contact surface of the second segment serves to limit or restrain
relative movement between the second segment and the elongate body.
In some embodiments, the second surface limits or restrains
movement between the second segment and the elongate body by
contacting the elongate body. In other embodiments, it is
contemplated that the second surface can limit or restrain movement
between the second segment and the elongate body by contacting the
first segment.
[0039] In yet another embodiment, an eyeglass is configured with
earstems that can provide enhanced retention of the eyeglass on the
head of a wearer. The eyeglass can comprise a frame and a pair of
earstems. The frame can support at least one lens in the wearer's
field of view. The pair of earstems can be attached to the frame
for supporting the frame on the head of the wearer. Each earstem
can comprise at least first and second flex zones or points whereat
the earstems can bend. The first flex zone or point can provide a
first degree of deflection, and the second flex zone or point can
provide a second degree of deflection. In some implementations, the
first degree of deflection can be different from the second degree
of deflection such that the earstems provide progressive bending
along a longitudinal axis of the earstems for providing a secure
and conforming fit over a range of head sizes and shapes.
[0040] In accordance with some embodiments, the earstem can be
configured such that the first degree of deflection can define a
stiffness of the first flex zone or point and the second degree of
deflection defines a stiffness of the second flex zone or point.
Further, the first degree of deflection can define a maximum
deflection of the earstem about the first flex zone or point and
the second degree of deflection can define a maximum deflection of
the earstem about the second flex zone or point. In this regard, it
is contemplated that the earstems can comprise a plurality of
segments being interconnected at the first and second flex zones or
points. The maximum deflection of the earstem at a given flex zone
or point can be limited by physical contact of adjacent segments at
the given flex zone or point during deflection of the earstem at
the given flex zone or point.
[0041] Some implementations of the earstem can be configured such
that the earstem comprises a plurality of rigid segments with at
least one segment extending generally between a first flex zone or
point and a second flex zone or point of the earstem. Optionally,
the rigid segments can be removably attachable to the earstem.
Further, the rigid segments can comprise contact surfaces that are
disposed adjacent to each other at the first and second flex zones
or points, and the earstem can be configured such that deflection
of the earstem is limited upon abutment of the contact surfaces of
the adjacent segments.
BRIEF DESCRIPTION OF THE DRAWINGS
[0042] The abovementioned and other features of the inventions
disclosed herein are described below with reference to the drawings
of the preferred embodiments. The illustrated embodiments are
intended to illustrate, but not to limit the inventions. The
drawings contain the following figures:
[0043] FIG. 1 is a perspective view of an eyeglass in accordance
with an embodiment of the present inventions.
[0044] FIG. 2 is a right side view of an earstem of the eyeglass of
FIG. 1.
[0045] FIG. 3 is a top view of the earstem shown in FIG. 2.
[0046] FIG. 4 is a perspective view of an earstem segment or
component, according to an embodiment.
[0047] FIG. 5 is an end view of the earstem segment or component
shown in FIG. 4.
[0048] FIG. 6 is a cross-sectional top view of the earstem segment
or component shown in FIG. 4, taken along lines 6-6 in FIG. 4.
[0049] FIG. 7 is a perspective view of another earstem segment or
component, according to an embodiment.
[0050] FIG. 8 is an end view of the earstem segment or component
shown in FIG. 7.
[0051] FIG. 9 is a cross-sectional top view of the earstem segment
or component shown in FIG. 7, taken along lines 9-9 in FIG. 7.
[0052] FIG. 10A is a top view of the earstem shown in FIG. 2,
wherein the earstem is in an undeflected position.
[0053] FIG. 10B is a top view of the earstem shown in FIG. 2,
wherein the earstem is in a deflected position.
[0054] FIG. 11A is a top cross-sectional view of the earstem shown
in FIG. 10A which is taken along lines 11A-11A of FIG. 2, wherein
the earstem is in the undeflected position.
[0055] FIG. 11B is a top cross-sectional view of the earstem shown
in FIG. 11A, wherein the earstem is in the deflected position.
[0056] FIG. 12 is a perspective view of an interior side and hinge
joint of the eyeglass shown in FIG. 1.
[0057] FIG. 13 is an exploded perspective view of the interior side
and hinge joint of the eyeglass shown in FIG. 1.
[0058] FIG. 14 is a bottom perspective view of an elongated body or
spine of the earstem, according to an embodiment.
[0059] FIG. 15 is another bottom perspective view of the elongated
body or spine shown in FIG. 14.
[0060] FIGS. 16-17 are perspective views of a cam member, according
to an embodiment.
[0061] FIG. 18 is a perspective view of a washer, according to an
embodiment.
[0062] FIG. 19 is a perspective view of a spring, according to an
embodiment.
[0063] FIG. 20 is a perspective view of another eyeglass in
accordance with another embodiment.
[0064] FIG. 21 is a left side view of an earstem of the eyeglass of
FIG. 20.
[0065] FIG. 22 is a top view of the earstem shown in FIG. 21.
[0066] FIG. 23 is a left side view of an earstem, according to
another embodiment.
[0067] FIG. 24 is a top view of the earstem shown in FIG. 23.
[0068] FIG. 25 is a top view a joint of an earstem wherein the
joint is in an undeflected position, according to an
embodiment.
[0069] FIG. 26 is a top view of the joint shown in FIG. 25 wherein
the joint is in a deflected position.
[0070] FIG. 27 is a top view another joint of an earstem wherein
the joint is in an undeflected position, according to another
embodiment.
[0071] FIG. 28 is a top view of the joint shown in FIG. 27 wherein
the joint is in a deflected position.
[0072] FIG. 29 is a left side view of an earstem of an eyeglass,
according to another embodiment.
[0073] FIG. 30 is a top view of the earstem shown in FIG. 29.
[0074] FIG. 31 is a left side view of another earstem of an
eyeglass, according to yet another embodiment.
[0075] FIG. 32 is a top view of the earstem shown in FIG. 31.
DETAILED DESCRIPTION
[0076] While the present description sets forth specific details of
various embodiments, it will be appreciated that the description is
illustrative only and should not be construed in any way as
limiting. Additionally, it is contemplated that although particular
embodiments of the present inventions may be disclosed or shown in
the context of dual lens eyewear systems, embodiments can be used
in both unitary and dual lens eyewear systems. Further, it is
contemplated that although particular embodiments of the present
inventions may be disclosed or shown in the context of frames
having full orbitals, such embodiments can be used with frames
having full or partial orbitals or rimless frames. Furthermore,
various applications of such embodiments and modifications thereto,
which may occur to those who are skilled in the art, are also
encompassed by the general concepts described herein.
[0077] As discussed above, embodiments disclosed herein are
operative to provide adjustability and optimal fit over a wide
range of different head sizes and shapes. Accordingly, an eyeglass
can be fabricated using metals or other stiff materials that may
have desirable properties while nevertheless enabling the eyeglass
to provide desirable flexural properties in the earstems thereof.
For example, titanium, carbon fiber, aluminum, and other such
materials provide superior mechanical properties while reducing the
weight of the eyeglass. Indeed, metals or other rigid materials can
be used to form the eyeglass, thus providing exceptional rigidity,
durability, and wear resistance. However, prior to the development
of the embodiments disclosed herein, and eyeglass made of such
rigid materials would function very poorly in accommodating a wide
range of head sizes and shapes. Thus, various embodiments disclosed
herein enable the use of rigid materials such as metals,
composites, and the like in eyewear while providing earstem
flexibility that was previously unavailable in the eyeglass is made
of such materials.
[0078] Thus, various embodiments are provided in which the eyeglass
has a metal frame and is operative to provide superior
adjustability and flexibility over a wide range of head sizes and
shapes, as could be possible with a plastic eyeglass. Nevertheless,
various features and aspects disclosed herein can be used in
eyeglasses fabricated from any material, whether the eyeglass is
made from plastic, composite, metal, or any combination
thereof.
[0079] Therefore, in accordance with at least one of the
embodiments disclosed herein is the realization that metal frame
eyeglasses can be improved by modifying the earstems such that the
earstems exhibit flexural properties similar to those exhibited by
a plastic or injection molded earstem. Further, some embodiments
provide for a metal earstem that comprises one or more flex zones
or points that allow the earstem to adjust to the natural and
variable shape of a variety of head sizes and shapes.
[0080] Regardless of the material, some embodiments of the earstem
can comprise one or more flex zones or points. The flex zones or
points can be strategically configured to allow the earstem to
provide a natural, versatile fit over a range of head shapes and
sizes. For example, a first flex zone can extend along an initial
anterior portion of the earstem, a second flex zone can extend
along a middle portion of the earstem, and a third flex zone can
extend along the anterior portion of the earstem. In particular,
some embodiments are configured such that the first and second flex
zones extend generally along an anterior half of the earstem while
the third flex zone extends along a posterior half of the earstem.
Further, some embodiments can be configured such that the number of
flex zones or points is distributed evenly along the earstem. For
example, three flex zones or points could be distributed along the
anterior portion, the middle portion, and along the posterior
portion of the earstem. The number of flex zones and locations of
the same can be varied as desired.
[0081] The present disclosure enables the modification and
adaptation of these principles to a variety of earstem shapes,
sizes, and applications.
[0082] As noted above, although some embodiments are discussed as
being made from metal, any of the embodiments disclosed herein can
be made of metal, plastic, and/or composite materials. Thus,
although many of the embodiments provide an effective solution to
providing a metal earstem with enhanced performance, embodiments
can also be made of plastic, composite, or combinations of
materials.
[0083] Further, in addition to addressing many problems associated
with eyeglasses made of rigid materials, the teachings and
disclosure herein also enable a personal skill in the art to design
an eyeglass having desirable aesthetic properties and later
construct an exceptional functional platform that provides superior
comfort and adaptability for wearers. In other words, embodiments
disclosed herein enable the function of the eyeglass to follow the
form of the eyeglass, rather than having the form or design of the
eyeglass be dictated by the function thereof. This and other novel
features of the embodiments disclosed herein provide an exceptional
advance in the eyewear industry.
[0084] In the present description, various mechanical terms are
used in reference to deformation and/or other structural
characteristics of components of the embodiments disclosed herein.
As used herein, term "stiffness" or "bending stiffness" can be
defined as the resistance of an elastic body to deformation by an
applied force. In this regard, stiffness is not the same as the
"flexural or elastic modulus"; stiffness relates to a property of a
solid body and flexural or elastic modulus relates to a property of
a material of the solid body.
[0085] In other words, stiffness is a property of the solid body
that is dependent on the material and the shape and boundary
conditions. See Wikipedia, "stiffness." For example, with reference
to embodiments disclosed herein, the bending stiffness "EI" of an
earstem relates the applied bending moment to the resulting
deflection of the earstem. The bending stiffness is the product of
the elastic modulus "E" of the earstem material and the area moment
of inertia "I" of the earstem cross-section. Further, when a
plurality of components or components comprising a plurality of
materials is used in the earstem, the equation is modified
accordingly to account for the individual components and material
variations. In a basic scenario, according to elementary beam
theory, the relationship between the applied bending moment M and
the resulting curvature .kappa. of the beam is:
M = EI .kappa. = EI 2 .omega. x 2 ##EQU00001##
where w is the deflection of the beam and x the spatial coordinate.
Accordingly, as will be apparent to one of skill in the art, the
bending stiffness of embodiments of the earstem can be measured
using the principles discussed above.
[0086] Referring now to the figures, wherein embodiments are shown
for purposes of illustrating features of the present inventions,
and not for limiting the same, FIG. 1 illustrates an embodiment of
an eyeglass 10 prepared in accordance with an aspect of the present
inventions. The eyeglass 10 comprises a first earstem 12 and a
second earstem 14. In the illustrated embodiment, the first and
second earstems 12, 14 are attached to a frame 16 of the eyeglass
10 at respective first and second joints 20, 22. The first and
second joints 20, 22 can enable the earstems 12, 14 to be
selectively pivoted between a stowed position and a deployed
position. As illustrated in FIG. 1, the earstems 12, 14 are
positioned in the deployed position, ready for use.
[0087] The eyeglass 10 can further comprise one or more earstem
bend control components. For example, referring to FIGS. 2-3, the
first earstem 12, the first earstem 12 can comprise one or more
segments 30, 32. In some embodiments, the segments 30, 32 can be
formed monolithically with the first earstem 12. However, in other
embodiments, the segments 30, 32 can be attached to a flexible,
elongate body, spine, or backbone 34. As illustrated in FIG. 2,
these segments 30, 32 can be attached to the body 34 using one or
more mechanical fasteners 40. In this regard, the first earstem 12
can be flexible to the degree permitted by the segments 30, 32.
[0088] Further, as shown in FIG. 3, the segments 30, 32 can also
form one or more flexible zones or points, 42, 43, 44, whereat the
first earstem 12 can bend. In the illustrated embodiment, a first
flexible zone or point 42 is formed between the joint 20 and an
anteriorly located first fastener 40'. A second flexible zone or
point 43 is formed between a second fastener 40'' and a third
fastener 40'''. A third flexible zone or point 44 is formed between
the third fastener 40''' and a posterior end 46 of the earstem
12.
[0089] In this regard, as used herein, the term "zone" or "point"
can be used to refer generally to the location along an earstem at
which the earstem bends or deflects. In some embodiments, the point
of deflection can be at a joint formed between two structures, and
the joint can comprise that deflection point where the structures
are made of a common or separate material, or whether the
structures are comolded, coupled together, or monolithically
formed. A deflection zone of the earstem can be formed along that
portion of the spine or backbone that is not constrained against
bending. In some embodiments, deflection zones or points can be
separated by zones or points where the spine or backbone is
constrained against deflection.
[0090] In addition, in the various embodiments disclosed herein, it
is contemplated that the flex zones or points should be configured
such that deflection at a given flex zone or point does not permit
the flex zone or point to undergo a stress that is greater than the
yield stress of that material. For example, the earstem can be
configured such that the allowable stress is less than about 70% of
the yield stress of the material. Further, the earstem can be
configured such that the allowable stress is less than about 50% of
the yield stress of the material. Moreover, the earstem can be
configured such that the allowable stress is between less than
about 30-50% of the yield stress of the material.
[0091] For example, an elongate body or spine, whether formed
separately or monolithically with other components, can be
configured to undergo bending stresses in order to permit
deflection of the ear stem. As noted above, the elongate body or
spine should be configured such that the allowable bending stresses
remain within an acceptable or under an acceptable percentage of
the yield stress of the elongate body or spine. Further, stress
concentrations at given flex zones or points should be minimized
such that stresses are distributed to avoid failure. In this
regard, it is contemplated that one of skill in the art can design
the ear stem such that a stresses exerted on any given component
stay within an acceptable range below the yield stress during use
of the eyeglass.
[0092] In the illustrated embodiment of FIGS. 1-19, the flexible
zones represent those areas along which the body 34 of the earstem
12 can bend or deflect. Other areas of the body 34 can be
constrained against deflection, such as the portion of the body 34
located between the first and second fasteners 40', 40''. These
features and the advantages thereof are discussed in greater detail
below.
[0093] In accordance with another aspect of the embodiment
illustrated FIGS. 1-19, the segments 30, 32 can comprise one or
more contact surfaces that are configured to assist in limiting
and/or controlling deflection of the earstem 12. For example, as
discussed below with reference to FIGS. 4-11B, the body or spine 34
of the earstem 12 can be a loud to deflect within a given range
until contacting a surface of one of the segments 30, 32. Upon
contact with the surface, the body or spine 34 will be constrained
against further deflection, thus constraining the earstem 12
against deflection as well. In some embodiments, the contact
surfaces of the segments 30, 32 can be formed on an interior side
of the segments 30, 32.
[0094] For example, referring now to FIGS. 4-6, an embodiment of
the second segment 32 is shown in a perspective, a side, and a
cross-sectional top view. The second segment 32 can comprise a
first contact surface 50, an attachment portion 100, and a recess,
pocket, or area of relief 102. In this regard, the attachment
portion 100 of the second segment 32 can be configured to attach
with and/or receive at least a portion of the body 34 such that the
second segment 32 can be mounted onto the body 34. For example, the
second segment 32 can be mounted onto the body or spine 34 of the
earstem 12 using a fastener, such as a bolt or screw which can be
passed through the body or spine 34 and attached to the attachment
portion 100 of the second segment 32.
[0095] FIG. 6 illustrates a the cross-sectional top view of the
second segment 32 in which the recess 102 widens from a recess of
the attachment portion 100 such that the body 34 can be laterally
deflected relative to the second segment 32. Thus, upon attachment
to the body 34, an upper surface 104 of the attachment portion 100
will abut and (along with the fastener used to attach the second
segment 32 to the body 34) constrain the corresponding portion of
the body 34 from movement while a length or portion of the body 34
adjacent to the recess 102 is unconstrained. Thus, due to the
presence of the recess 102, a portion of the body 34 will be
generally unconstrained against deflection along the anterior
portion 106 of the second segment 32. In other words, the body 34
can be rigidly attached to the second segment 32 at the attachment
portion 100 while being able to deflect into the recess 102 formed
at the anterior portion 106 of the second segment 32. However, it
is noted that a top surface 110 of the recess 102 can serve to
constrain lateral deflection of the body 34. As such, the
configuration and geometry of the recess 102 and the top surface
110 can be selectively configured to allow a desired degree of
lateral deflection of the body 34.
[0096] With reference now to FIG. 7-9, an embodiment of the first
segment 30 is shown in a perspective, a side, and a cross-sectional
top view. The first segment 30 can comprise a second contact
surface 52 and a third contact surface 54. The second contact
surface 52 can be disposed along a posterior end 120 of the first
segment 30, and the third contact surface 54 can be disposed along
and anterior end 122 of the first segment 30. The first segment 30
can also comprise an attachment portion 130 and at least one
recess, pocket, or area of relief. In some embodiments, the
attachment portion 130 can be disposed along a central portion of
the first segment 30. However, it is also contemplated that the
attachment portion can be located along either the posterior or
anterior portions 120, 122 of the first segment 30.
[0097] As discussed above with respect to the second segment 32,
the attachment portion 130 of the first segment 30 can be
configured to attach with or receive at least a portion of the body
34 such that the first segment 30 can be mounted onto the body 34.
For example, the first segment 30 can be mounted onto the body or
spine 34 of the earstem 12 using a fastener, such as a bolt or
screw which can be passed through the body or spine 34 and attached
to the attachment portion 130 of the first segment 30.
[0098] Further, the first segment 30 can comprise an anterior
protrusion 160. The anterior protrusion 160 can be disposed
intermediate the upper and lower fork members (discussed further
below) of the body or spine 34. FIGS. 11A-B also illustrate the
movement of the segment 32 relative to the body or spine 34, which
movement is easier to see noting the position of the protrusion 160
relative to the body or spine 34.
[0099] Further, as shown in the illustrated embodiment, the first
segment 30 can comprise an anterior recess 132 and a posterior
recess 134. Similar to the recess 102 of the second segment 32, the
anterior and posterior recesses 132, 134 can be configured to allow
the body 34 to deflect relative to the first segment 30. In this
regard, once the first segment 30 is mounted onto the body 34, the
body 34 can deflect into either of the anterior or posterior
recesses 132, 134.
[0100] For example, with reference to FIG. 9, the recesses 132, 134
both widen from a recess of the attachment portion 130 such that
the body 34 can be laterally deflected relative to the first
segment 30. Thus, upon attachment to the body 34, an upper surface
140 of the attachment portion 130 will abut and (along with one or
more fasteners used to attach the first segment 30 to the body 34)
constrain the corresponding portion of the body 34 from movement
while a length or portion of the body 34 adjacent to the recesses
132, 134 are unconstrained from movement.
[0101] Thus, due to the presence of the recesses 132, 134, portions
of the body 34 will be generally unconstrained against deflection
along the anterior and posterior portions 120, 122 of the first
segment 30. In other words, the body 34 can be rigidly attached to
the first segment 30 at the attachment portion 130 while being able
to deflect into the recesses of 132, 134 formed at the respective
ones of the anterior and posterior portions 120, 122 of the first
segment 30. However, it is noted that a top surface 150 of the
recess 132 and a top surface 152 of the recess 134 can serve to
constrain lateral deflection of the body 34. As such, the
configuration and geometry of the recesses 132, 134 and the top
surfaces 150, 152 can be selectively configured to allow a desired
degree of lateral deflection of the body 34.
[0102] Accordingly, the embodiment illustrated in FIGS. 1-19 can be
configured to allow the body or spine 34 to deflect relative to the
first and second segments 30, 32. Further, the movement and/or
deflection of the body 34 can also be limited and/or controlled by
the first and second segments 30, 32.
[0103] FIGS. 10A-B illustrate the first earstem 12 in an
undeflected position (shown in FIG. 10A) and a deflected position
(shown in FIG. 10B). As shown, the first and second segments 30, 32
serve to limit the lateral deflection of the body 34 along the
initial or anterior half of the earstem 12. As noted above, the
first and second flex zones or points 42, 43 shown in FIG. 3 lie
generally within the initial or anterior half of the earstem 12. In
this regard, the third flex zone 44 comprises the posterior half of
the earstem 12. Accordingly, the deflection of the posterior half
of the earstem 12 will generally be dictated by the geometry and
material properties of the body or spine 34 in this embodiment.
Thus, FIGS. 10A-B illustrate how the earstem 12 can accommodate a
variety of head sizes and shapes.
[0104] Optionally, in some embodiments, it is contemplated that the
first and second contact surfaces 50, 52 of the respective ones
above the first and second segments 30, 32 can be configured to
limit and/or control deflection of the earstem 12. In this regard,
it is contemplated that deflection of the earstem 12 can be
restrained at the flexible zone or point 43 due to the interaction
between the first and second contact surfaces 50, 52. In other
words, the first earstem 12 can be restrained from further medial
bending beyond a given range due to interference or contact between
the first and second segments 30, 32.
[0105] For example, the deflection of the first earstem 12 can be
controlled and/or limited by adjusting the geometry and/or spacing
of the first and second contact surfaces 50, 52 of the segments 30,
32. The first and second segments 30, 32 can be spaced apart by a
gap 60 in the undeflected position, and the earstem 12 can be
configured such that the gap 60 closes as the first earstem 12
moves from the undeflected position to the deflected position. When
the gap 60 is completely closed, the contact surfaces 50, 52 of the
first and second segments 30, 32 can abut each other and prevent
further deflection of the earstem 12 in the second flex zone 43.
The gap 60 can therefore correspond at least in part to an initial
or primary degree of permissible deflection that can be made
between the segments 30, 32 of the first earstem 12. The size of
the gap 60 can be varied in order to provide a desired initial or
primary degree of deflection at the flexible zone or point 43.
[0106] In accordance with another unique aspect of some
embodiments, the first and second contact surfaces 50, 52 can also
be arcuately formed. As a result, some embodiments of the first and
second contact surfaces 50, 52 can engage each other not only to
limit further medial bending of the first earstem 12, but to also
limit torsional or vertical bending of the first earstem 12 at the
flexible zone or point 43.
[0107] In accordance with another aspect of the embodiment shown in
FIGS. 1-19, it is contemplated that the flex zones can be located
at a given distance from an anterior end 45 of the earstem 12, such
as the joint 20. In other words, the flex zones can be distributed
along the first earstem 12 intermediate the anterior end 45 and a
posterior end 46. The first earstem 12 can be configured to
optimize the length and/or location of the flex zones.
[0108] For example, as discussed above with respect to FIG. 3, the
first flex zone 42 can extend between the joint 20 and the fastener
40'. The second flex zone 43 can extend between the fastener 40'
and the fastener 40''. The third flex zone 44 can extend between
the fastener 40''' and the posterior end 46 of the earstem 12. It
is contemplated that the length and location of the flex zones 42,
43, 44 can be modified by changing the location of the fasteners in
the disclosed embodiment. Further, the space between the fasteners
40' and 40'' can also be modified to adjust the length of an
inflexible zone of the body or spine 34.
[0109] It will be appreciated that the length and/or location of
the flexible zones of the earstem 12 can determine the deflected
shape or contour of the first earstem 12. For example, the first
flex zone 42 can be configured to extend along the anterior half of
the earstem 12. Specifically, the first flex zone 42 can extend
along the anterior one third section of the earstem 12. In some
embodiments, the first flex zone 42 can be configured to extend
from the joint 20 and have a length of between about 10 mm to about
30 mm. In the illustrated embodiment, the length of the first flex
zone 42 is approximately 20 mm.
[0110] Further, the second flex zone 43 can be configured to extend
along the anterior two-thirds portion of the earstem 12. In
particular, the first flex zone 42 and the second flex zone 43 can
collectively extend along the anterior half section of the earstem
12. In some embodiments, the second flex zone 43 can begin at a
distance of between about 10 mm to about 40 mm from the joint 20
and can have a length of between about 10 mm to about 30 mm. Thus,
a center of the second flex zone 43 can be about 20 mm to about 70
mm from the joint 20. In the illustrated embodiment, the second
flex zone 43 begins at about 25 mm from the joint 20 and has a
length of about 20 mm.
[0111] Finally, the third flex zone 44 can be configured to extend
along the posterior two thirds portion of the earstem 12. In
particular, the third flex zone 44 can extend at least along the
posterior half section of the earstem 12. In some embodiments, the
third flex zone 44 can begin at a distance of between about 30 mm
to about 70 mm from the joint 20 and can have a length of between
about 40 mm to about 120 mm. In the illustrated embodiment, the
third flex zone 43 begins at about 45 mm from the joint 20 and has
at length of about 90 mm.
[0112] Similarly, as shown in FIG. 2, a posterior end 47 of the
second segment 32 can be spaced at a length or distance from the
joint 20. Further, the interconnection of the second segment 32
with the body 34 and the shape of the second segment 32 can be
selected to constrain movement of the body 34 adjacent to the
second segment 32. It is contemplated that the elongate body 34 of
the first earstem 12 may tend to deflect at the posterior end 47 of
the second segment 32. This deflection is similar to that which may
occur at the flexible zone or point 42 and the joint 20 in that the
configuration of the end 47 and the presence or absence of a recess
can determine whether and how much the body 34 is permitted to
deflect. As such, the length or distance of the end 47 from the
joint 20 can be modified similarly to the length or distance of the
fastener 40' from the joint 20, as regards the first segment 30. In
this regard, the end 47 can be spaced at approximately the middle
one-third section of the earstem 12. More specifically, the end 47
can be spaced at approximately the midpoint of the earstem 12. In
some embodiments, the length or distance of the end 47 from the
joint 20 can optionally be configured to be between about 30 mm to
about 70 mm. In the illustrated embodiment, the length or distance
of the end 47 from the joint 20 is approximately 50 mm.
[0113] The location of flexible zones or points can be modified in
order to allow the earstem to have desirable bending
characteristics. For example, it is contemplated that the flexible
zones or points can be spaced at equal lengths along the earstem.
Further, it is contemplated that the flexible zones or points can
be spaced at increasingly shorter lengths along the earstem. In
this manner, the geometry of the earstem can be selectively
configured to produce a given shape, deflected position, or bending
mode. Various embodiments and illustrations of this principle are
shown and described herein.
[0114] The above-disclosed ranges of lengths and locations of the
flexible zones can be incorporated into various embodiments of the
earstem disclosed herein. However, it is contemplated that the
number of flexible zones can also be modified by one of skill in
the art. Additionally, as discussed herein, the dimensions and
material properties of the body or spine and any segment of the
earstem can also be selected were modified by one of skill in the
art to produce an earstem having desirable flexural and geometric
properties.
[0115] FIG. 11A is a top cross-sectional view of the earstem 12
shown in the top view of FIG. 10A while in the undeflected
position. FIG. 11B is a top cross-sectional view of the earstem 12
shown in the top view of FIG. 10B while in the deflected position.
With initial reference to FIG. 11A, the body or spine 34 is
attached to the first and second segments 30, 32 at the respective
ones of the attachment portions of 100, 140. Notably, the recesses
132, 134, and 102 are provided such that the body or spine 34 can
deflect. As discussed above, the surfaces 150, 152, and 110 provide
a means for limiting and/or controlling deflection of the body or
spine 34.
[0116] Referring now to FIG. 11B, the earstem 12 is shown in a
deflected position in which the body or spine 34 has deflected. In
particular, the body or spine 34 has moved from a generally curved
configuration to a straighter configuration. However, it is
contemplated that the shape of the body or spine 34 can be modified
in either the undeflected or deflected positions. FIG. 11B also
illustrates that the body or spine 34 can be at least partially
deflected into the recesses of the first and second segments 30,
32. Further, the surfaces 150, 152, and 110 can serve to prevent
further deflection and/or control the deflection of the body or
spine 34. As illustrated, the body or spine 34 can abut the
surfaces 150, 152, and 110 in the deflected position.
[0117] The illustrated embodiment of FIGS. 1-19 can also provide a
manner of dynamically controlling and/or limiting the motion of the
first earstem 12. In this regard, the stiffness of the first
earstem 12 can be selectively controlled based on the dimensions
and materials used for the joints, elongate body, and segments of
the first earstem 12.
[0118] For example, in addition to the initial degree of deflection
relating to the gap 60, it is also contemplated that the elongate
body 34 of the first earstem 12 can permit a further or secondary
degree of deflection. In this regard, the elongate body 34 of the
first earstem 12 can be formed from an elastic material that allows
the portion of the elongate body 34 to be stretched in tension
after the first earstem 12 deflects according to the initial degree
of deflection corresponding to the size of the recesses, or in some
embodiments, the gap between contact surfaces of adjacent
segments.
[0119] As shown in FIG. 2, a length 62 of the elongate body 34 can
be positioned between the mechanical fasteners 40 that attach the
segments 30, 32 to the elongate body 34. In some embodiments, the
body or spine 34 can be dimensions to control the stiffness of the
length 62. In other words, one of skill in the art can take into
account the flexural or elastic modulus of the material of the body
or spine 34 with the cross-sectional dimensions of the body or
spine 34 along the length 62 in order to provide desirable bending
characteristics of the elongate body or spine 34 along the length
62. Embodiments wherein the body or spine 34 is fabricated from a
metal or composite can be especially benefited by such an
analysis.
[0120] It is contemplated that the body or spine 34 can be
configured such that the length 62 of the elongate body 34 can
provide a further or secondary degree of deflection for the first
earstem 12. For example, the body or spine 34 can he made of an
elastic material such that as the length 62 stretches, thus
allowing at least limited further deflection about the flexible
zone or point 42. It is therefore contemplated that the material
and/or geometry of the elongate body 34 can be selected to provide
a desired secondary degree of deflection about the flexible zone or
point 42. Therefore, as the length 62 stretches, the force required
to cause additional deflection can be dynamically increased.
[0121] Referring again to FIGS. 10A-B in accordance with some
embodiments, the first segment 30 can comprise the third contact
surface 54 and the frame 16 can comprise a fourth contact surface
56. Optionally, it is contemplated that the third and fourth
contact surfaces 54, 56 can define a gap 64 that can correspond to
an initial or primary degree of deflection at the joint 20. In
optional embodiments, the third contact surface 54 can interact
with the fourth contact surface 56 to limit and/or control movement
of the earstem 12. For example, the third contact surface 54 and
the fourth contact surface 56 can abut each other, similar to the
optional embodiment disclosed above with respect to the first and
second contact surfaces 50, 52, such that the third and fourth
contact surfaces 54, 56 can provide stability and further control
and/or limit the deflection of the first earstem 12. In this
regard, the third and fourth contact surfaces 54, 56 can be
arcuately formed. In this manner, the third and fourth contact
surfaces 54, 56 can engage each other to not only limit further
medial bending of the first earstem 12, but to also limit torsional
or vertical bending of the first earstem 12 at the joint 20.
[0122] Optionally, in such embodiments, in addition to the initial
degree of deflection relating to the gap 64, it is also
contemplated that the elongate body 34 of the first earstem 12 can
permit a further or secondary degree of deflection at the joint 20.
For example, the elongate body 34 of the first earstem 12 can be
formed from an elastic material that allows the portion of the
elongate body 34 to be stretched in tension after the first earstem
12 deflects according to the initial degree of deflection
corresponding to the size of the gap 64. Specifically, as shown in
FIG. 2, a length 66 of the elongate body 34 can be positioned
between a pin 68 of the joint 20 and the mechanical fastener 40'
that attach the segment 32 to the elongate body 34. Accordingly,
the length 66 of the elongate body 34 can provide a further or
secondary degree of deflection for the first earstem 12 as the
length 66 stretches, thus allowing at least limited further
deflection about the joint 20. It is therefore contemplated that
the material and/or geometry of the elongate body 34 can be
selected to provide a desired secondary degree of deflection about
the joint 20. Therefore, as the length 66 stretches, the force
required to cause additional deflection can be dynamically
increased.
[0123] As noted above, in embodiments wherein the body or spine 34
is formed from a metal or composite, one of skill in the art can
take into account the flexural or elastic modulus of the material
of the body or spine 34 with the cross-sectional dimensions of the
body or spine 34 along the length 66 in order to provide desirable
bending characteristics of the elongate body or spine 34 along the
length 62. Embodiments wherein the body or spine 34 is fabricated
from a metal or composite can be especially benefited by such an
analysis.
[0124] As will be appreciated with reference to FIGS. 1-11B, the
illustrated embodiment can also provide a manner of progressively
controlling and/or limiting the motion of the first earstem 12. In
this regard, the stiffness of the first earstem 12 can be
selectively controlled based on the dimensions and materials used
for the flexural zones, elongate body or spine, and segments of the
first earstem 12.
[0125] For example, it is contemplated that the earstem can
comprise more than two segments. In such embodiments, the earstem
can comprise a plurality of flexible zones or points disposed
between the segments of the earstem. Optionally, the flexible zones
or points of such embodiments could also comprise gaps formed
between the segments. In some embodiments, relative movement
between adjacent segments can serve to close the gaps, thereby
limiting the initial or primary degree of deflection at the zones
or points. Optionally, the zones or points can provide a further or
secondary degree of deflection relating to tensile bending or
stretching of an elastic body or spine.
[0126] Moreover, embodiments can be to enable progressive or
controlled deflection of the earstem 12. In particular, it is
contemplated that one or more recesses formed in a segment attached
to the body or spine of the earstem can limit and/or control
deflection of the body or spine. Further, in optional aspects, gaps
can be formed between the segments of the earstem and selectively
dimensioned in order to allow progressive deflection of the
earstem.
[0127] For example, in an embodiment wherein the earstem has first,
second and third flexible zones or points, the earstem could begin
deflecting at the first zone or point prior to deflection of the
second and third zones or points. In particular, it may be
beneficial to allow the anterior or first zone or point to deflect
initially when the first zone or point is disposed anteriorly
relative to the second and third zones or points. Subsequent to the
deflection at the first zone or point, the second zone or point can
begin deflecting. Then, subsequent to deflection at the second zone
or point, the third zone or point can begin deflecting. Thus, the
earstem can be configured such that each zone or point at least
partially deflects prior to deflection of a subsequent zone or
point. In some embodiments, deflection at a given zone or point may
be completed prior to the beginning of deflection at the subsequent
zone or point. In other words, the earstem can reach maximum
deflection at the first zone or point before beginning to deflect
at the second zone or point, and the earstem can then reach maximum
deflection at the second joint before beginning to deflect at the
third zone or point. As such, various embodiments of the earstem
disclosed herein can not only provide progressive deflection, but
can provide partial or complete progressive deflection.
[0128] Nevertheless, it is contemplated that in some embodiments,
the flexible zones or points of the earstem can provide
proportional and/or simultaneous deflection.
[0129] With further reference to the embodiment shown in FIGS.
1-19, the segments 30, 32 can be configured as rigid components of
the first earstem 12. However, it is contemplated in some
embodiments, that one or more segments can be flexible, and can
provide dynamic deflection of the earstem based on the segment
geometry and material.
[0130] Further, as shown in the illustrated embodiment of FIGS.
1-19, the segments 30, 32 can be formed separately from the
elongate body 34 of the first earstem 12, and the segments 30, 32
can be generally rigid components that are attached to a relatively
flexible elongate body 34. However, embodiments are contemplated in
which the segments are formed monolithically with the earstem,
spaces, joints, or gaps between the segments and the frame and/or
the remainder of the first earstem can be dimensioned in order to
provide flexibility relative to the segments.
[0131] Even in such diverse embodiments, the earstem can comprise a
variable or constant stiffness along its length and/or one or more
deflection modes. For example, in a first deflection mode, the
elongate body can bend at spaces, joints, or gaps between the
segments and the frame and/or the remainder of the earstem.
Further, in some embodiments, in a second deflection mode, the
elongate body can be stretched or deformed in tension. Furthermore,
in some embodiments, in a third deflection mode, these segments can
be deflected themselves in order to allow a further degree of
deflection of the first earstem. The stiffness of the earstem can
vary along the length thereof, at given zones or points, in order
to modify the deflection mode, including the progression of
deflection.
[0132] Referring now to FIG. 12, a perspective view of an interior
portion of the assembled earstem 12 and eyeglass 10 are shown.
Further, FIG. 13 illustrates, in perspective, and exploded view of
the joint 20 of the eyeglass 10. As illustrated and discussed
below, the joint 20 can be configured to comprise a cam-assist
closure mechanism.
[0133] As shown in FIG. 13, the joint 20 can be formed from an
anterior portion or end 200 of the body or spine 34, a washer 202,
and elongate pin 204, a spring 206, and a cam member 208. These
components can be received or mounted at a lateral side 210 of the
frame 16. In particular, the frame 16 can comprise a recessed area
212 having upper and lower components 214, 216 that can engage to
pin 204 in order to retain the above-noted components and thereby
form the joint 20.
[0134] One of the unique aspects of embodiments of the joint 20 is
that the joint can comprise a cam-assist closure mechanism. In this
regard, the cam-assist closure mechanism can comprise one or more
protrusions formed on the anterior portion 200 of the body or spine
34 that can interact with the cam member 208.
[0135] For example, with reference to FIG. 14, the anterior portion
200 of the elongate body or spine 34 can comprise upper and lower
fork members 240, 242. In some embodiments, is one of the fork
members 240, 242 can comprise a projection or recess that can be
configured to interact with the cam member 208. As illustrated in
FIG. 14, the lower fork member 242 can comprise a pair of
projections 250 that extend downwardly from a pin mounting
component 252 of the lower fork member 242.
[0136] Additionally, as discussed above, the body or spine 34 can
define a variable cross-sectional profile in order to provide a
given stiffness at a given point along the length of the body or
spine 34. In the embodiment illustrated in FIGS. 14-15, the
dimensions of the body or spine 34 can vary in width or thickness.
For example, FIG. 14 illustrates that the body or spine 34 can have
a width that varies along the length thereof. Notably, the body or
spine 34 can comprise an area or zone 260 of increased stiffness
which is formed by increasing the width of the body or spine 34 in
that area 260. Moreover, FIG. 15 illustrates that the thickness of
the body or spine 34 can be varied as well. For example, the
thickness of the body or spine 34 along the anterior portion 200
thereof is reduced compared to the thickness of the body or spine
34 in other areas thereof. In this regard, the stiffness at any
given point along the anterior portion 200 of the body or spine 34
will be a summation of the stiffnesses of the individual upper and
lower fork members 240, 242. Accordingly, in order to provide it
desirable flexural properties, the thickness and/or width of the
body or spine 34 can be varied in various embodiments.
[0137] One of the unique aspects of some embodiments disclosed
herein is that the fork-shaped anterior portion 200 of the body or
spine 34 can also contribute to a self-opening or self-closing
mechanism of the eyeglass 10. In some embodiments, this feature can
be provided in combination with the cam-assist closure mechanism.
In this regard, the upper and lower fork members 240, 242 can be
configured to resist compressive forces that would cause the upper
and lower fork members 240, 242 to converge towards each other. In
order to provide such compressive forces, the cam member 208 can
interact with the upper and lower fork members 240, 242 to cause
axial movement of the fork members 240, 242 as the body or spine 34
is rotated about an axis 262 defined by the joint 20, and more
specifically, the pin 204.
[0138] For example, as illustrated in FIGS. 16-17, the cam member
208 can comprise one or more recesses 280 and one or more raised
portions 282 formed along an upper surface 284 of the cam member
208. In particular, some embodiments can comprise a plurality of
recesses 280 that are spaced between a plurality of raised portions
282. Nevertheless, it is contemplated that embodiments can be
provided which include either a pair of protrusions and a recess or
a pair of recesses and a protrusion. In this regard, the function
of the recess and the protrusion is to urge a corresponding
protrusion or recess formed on the anterior portion 200 of the body
or spine 34 toward a given rotational rest position.
[0139] Thus, the number of recesses and protrusions formed in the
cam member can determine the number of rotational rest positions.
In use, the cam member 208 and the body or spine 34 can interact to
create rotational rest positions. For example, if the body or spine
34 comprises a protrusion that engages the cam member 208, the
protrusion of the body or spine 34 will tend to be axially urged
into a corresponding recess of the cam member 208. Similarly, if
the body or spine 34 comprises a recess that engages the cam member
208, the recess of the body or spine 34 will tend to be axially
urged to receive a corresponding protrusion of the cam member 208.
In either configuration, a rest position is achieved when the body
or spine 34 is rotationally aligned with the cam member 208. Thus,
in some embodiments, a first rotational rest position can be
achieved when the earstem is in a fully deployed position, and a
second rotational rest position can be achieved when the earstem is
in a stowed position in which the earstem is disposed adjacent to
the frame of the eyeglass.
[0140] Continuing, the earstem 12 can be urged to one of the first
and second rotational rest positions due to the spacing and
mounting of the body or spine 34 and the cam member 208 between the
upper and lower components 214, 216 of the recessed area 212 of the
frame 16. Specifically, during rotation, the earstem 12 is biased
to one of the first and second rotational rest positions due to the
propensity of the upper and lower fork members 240, 242 to resist a
axial compression or deflection, along with the forced axial
compression or deflection caused to the upper and lower fork
members 240, 242 as the pin mounting component 252 as the
protrusions 250 pass over the raised protrusions 282 of the cam
member 208. In this manner, the eyeglass 10 can provide an
effective manner of maintaining the ear stands in one of the open
and closed positions.
[0141] Optionally, it is contemplated that in some embodiments, the
spring 206 can be used as an assist member to further urge the
upper and lower fork members 240, 242 apart such that the earstem
12 is biased towards one of the first and second rotational rest
positions. In this regard, the spring 206 could be configured to
extend between the upper and lower fork members 240, 242. In some
embodiments, the spring 206 can make direct contact with the upper
and lower fork members 240, 242. Further, in some embodiments, the
spring 206 can be disposed about the axis 262 of rotation of the
earstem 12. For example, the spring 206 can be passed over the
elongate pin 204.
[0142] Referring now to FIGS. 20-22, another embodiment of an
eyeglass and earstem combination are shown. FIG. 20 illustrates an
eyeglass 1100 having a first earstem 1102, a second earstem 1104,
and a frame 1106. As shown in FIG. 21, the first earstem 1102 can
comprise a plurality of segments 1110, 1112, 1114, 1116. These
segments 1110, 1112, 1114, 1116 can be monolithically formed along
an elongate body 1120 or backbone of the first earstem 1102.
Accordingly, in such an embodiment, the segments 1110, 1112, 1114,
1116 and the frame 1106 can form a plurality of joints 1132, 1134,
1136, 1138 where at the first earstem 1102 can bend.
[0143] Similar to the embodiment discussed above with reference to
FIGS. 1-19, the earstem 1102 can be uniquely configured to optimize
the distance along the first earstem 1102 of the joints 1132, 1134,
1136, 1138. Further, the spacing or gaps between the segments 1110,
1112, 1114, 1116 and the frame 1106 can also be optimized in order
to limit and/or control bending of the first earstem 1102.
[0144] Additionally, it is noted that the geometry of the first
earstem 1102 at each of the joints 1132, 1134, 1136, 1138 can be
selected such that variable or progressive bending occurs along the
earstem 1102. As illustrated, the joint 1132 can provide a wider
cross-section, thus providing more limited movement and greater
stiffness than the joint 1134 which provides a narrower
cross-section. In this regard, the stiffness of the first earstem
1102 can be selectively controlled based on the dimensions and
materials used for the joints, elongate body, and segments of the
first earstem 1102.
[0145] FIGS. 23-24 illustrate another embodiment of an eyeglass and
earstem combination. As illustrated, an eyeglass 1200 can be
provided that comprises a first earstem 1202 that is formed to
include a plurality of segments 1210, 1212, 1214, 1216. In this
embodiment, the earstem 1202 comprises three flexible joints 1220,
1222, 1224. The flexible joints 1220, 1222, 1224 can be disposed at
approximately equal distances along the length of the earstem 1202.
Further, in such an embodiment, the segments 1210, 1212, 1214, 1216
can be formed monolithically with the earstem 1202. As such, each
joint 1220, 1222, 1224 can comprise a narrowed section of the
earstem 1202 that is relatively more flexible than the segments
1210, 1212, 1214, 1216 thereof. Moreover, similar to the
embodiments discussed above with reference to FIGS. 1-22, the
earstem 1202 can be configured to progressively deflect, provide
controlled deflection to a given deflected position, allow
deflection within a given range, as well as the other features
discussed above.
[0146] For example, as illustrated in the top views of FIGS. 25 and
26, the joint 1220 of the earstem 1202 can comprise a gap 240 that
narrows until closing or bottoming out, thus limiting the
deflection of the earstem 1202 at the joint 1220. FIG. 25
illustrates the joint 1220 prior to deflection, while FIG. 26
illustrates the joint 1220 subsequent to deflection.
[0147] In accordance with an embodiment of another joint, FIGS.
27-28 illustrate an earstem 1300 having a joint 1302 formed between
adjacent segments 1304, 1306. These segments 1304, 1306 are
attached to an elongate body or backbone 1308. As such, the joint
302 illustrated in FIGS. 27 and 28 is similar to the embodiment
illustrated in FIGS. 10A-B. Accordingly, as the earstem 1300
deflects, the segments 1304, 1306 can contact each other to limit
and/or control deflection of the earstem 1300. As in FIGS. 25-26, a
gap of 1310 formed between the segments 1304, 1306 can narrow until
closing or bottoming out when the earstem 1300 moves from an
undeflected position in FIG. 27 to a deflected position in FIG.
28.
[0148] One of the unique aspects of the embodiment illustrated in
FIGS. 27-28 is the lateral overlap of the segments 1304, 1306
adjacent to the gap 1310. In this regard, an end 1320 of the
segment 1304 can be positioned adjacent to an end 1322 of the
segment 1306. When the earstem 1300 is deflected as shown in FIG.
28, the ends 1320, 1322 can form an interlocking joint that
provides rigidity and stability for the joint 1302. In such
embodiments, the ends 1320, 1322 can comprise complementary
interlocking features that engage each other during deflection of
the earstem 1300.
[0149] In accordance with yet another embodiment, FIGS. 29-30
illustrate an eyeglass 1400 having an earstem 1402 that is coupled
to a frame 1404. As discussed above, the earstem 1402 can comprise
many of the features and advantages provided and disguised with
regard to the embodiments shown in FIGS. 1-28. However, the
embodiment illustrated in FIGS. 29-30 is unique in that the earstem
1402 comprises a plurality of segments 1410, 1412, 1414 that are
comolded within the earstem 1402. The segments 1410, 1412, 1414 can
comprise a material that is different from the molded material
forming the remainder of the earstem 1402. As such, the earstem
1402 can comprise a plurality of joints 1420, 1422, 1424 at which
the earstem 1402 has a reduced stiffness relative to areas of the
earstem along which the segments 1410, 1412, 1414 extend. Similar
to the embodiments discussed above, the cross-sectional dimension
of the earstem 1402 can be selected so as to provide a desired
degree of stiffness at each of the respective joints.
[0150] FIGS. 31 and 32 illustrate yet another embodiment of an
eyeglass and earstem combination. As illustrated, and eyeglass 1500
can comprise an earstem 1502 that is coupled to a frame 1504. The
earstem 1502 provides a various similar features and functional
attributes as the embodiments discussed and illustrated with
reference to FIGS. 1-30. In the embodiment of FIGS. 31 and 32
however, the earstem 502 comprises a plurality of segments 1510,
1512, 1514, 1516 that are interconnected in an end-to-end manner
using discrete interconnector components or bodies 1520, 1522,
1524.
[0151] In accordance with some embodiments, the interconnector
bodies of 1520, 1522, 1524 can comprise springs or other resilience
elements that allow motion between the segments 1510, 1512, 1514,
1516. Similar to the embodiments discussed herein, the
interconnector bodies 1520, 1522, 1524 can form joints of the
earstem 1502. In this regard, the individual interconnector bodies
1520, 1522, 1524 can each have different stiffnesses such that the
joints between the segments 1510, 1512, 1514, 1516 provide
progressive deflection. Further, as also noted above with respect
to the other embodiments disclosed herein, each of the segments
1510, 1512, 1514, 1516 can provide a secondary degree of deflection
in addition to the initial or primary degree of deflection of the
interconnector bodies 1520, 1522, 1524.
[0152] Furthermore, in accordance with any of the embodiments
disclosed or showed herein, it is contemplated that the design of a
given flex zone or point should also consider the yield stress of
the component or ear stem. In this regard, it would be undesirable
to exert a bending stress on the ear stem or one of its components
which exceeds the yield stress of the ear stem or component. In
such situations, deflection or de-formation of the ear stem or
component would become inelastic.
[0153] Nevertheless, it is contemplated that certain portions of
the earstem, such as the elongate body or spine can be formed of a
material that is bendable to a given shape while retaining elastic
properties. In this regard, it is contemplated that the posterior
half or posterior portion of the elongate body or spine can be
bended by the wearer in order to further customize the fit of the
eyeglass.
[0154] Although these inventions have been disclosed in the context
of certain preferred embodiments and examples, it will be
understood by those skilled in the art that the present inventions
extend beyond the specifically disclosed embodiments to other
alternative embodiments and/or uses of the inventions and obvious
modifications and equivalents thereof. In addition, while several
variations of the inventions have been shown and described in
detail, other modifications, which are within the scope of these
inventions, will be readily apparent to those of skill in the art
based upon this disclosure. It is also contemplated that various
combination or sub-combinations of the specific features and
aspects of the embodiments may be made and still fall within the
scope of the inventions. It should be understood that various
features and aspects of the disclosed embodiments can be combined
with or substituted for one another in order to form varying modes
of the disclosed inventions. Thus, it is intended that the scope of
at least some of the present inventions herein disclosed should not
be limited by the particular disclosed embodiments described
above.
* * * * *