U.S. patent application number 12/454792 was filed with the patent office on 2009-09-17 for shelter frame for spectacles.
Invention is credited to Yiling Xie.
Application Number | 20090231539 12/454792 |
Document ID | / |
Family ID | 41062653 |
Filed Date | 2009-09-17 |
United States Patent
Application |
20090231539 |
Kind Code |
A1 |
Xie; Yiling |
September 17, 2009 |
Shelter frame for spectacles
Abstract
A shelter frame includes two shelter lenses, two lens holders
provided at two outer sides of the shelter lenses respectively, and
a retractable arm extended between two inner sides of the shelter
for applying a retractable force therebetween to adjust the control
distance. When the shelter lenses are pulled away from each other
to lengthen the retractable arm for extending the control distance,
the lens holders are adapted for engaging with two outer sides of
the lenses of the primary frame, such that when the retractable arm
is retracted via the retractable force, the shelter lenses are
adapted for holding in front of the lenses respectively so as to
detachably couple the shelter frame in front of the primary
frame.
Inventors: |
Xie; Yiling; (Arcadia,
CA) |
Correspondence
Address: |
DAVID AND RAYMOND PATENT FIRM
108 N. YNEZ AVE., SUITE 128
MONTEREY PARK
CA
91754
US
|
Family ID: |
41062653 |
Appl. No.: |
12/454792 |
Filed: |
May 21, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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12075712 |
Mar 12, 2008 |
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12454792 |
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Current U.S.
Class: |
351/48 ;
351/47 |
Current CPC
Class: |
G02C 9/04 20130101 |
Class at
Publication: |
351/48 ;
351/47 |
International
Class: |
G02C 9/00 20060101
G02C009/00 |
Claims
1. A shelter frame for detachably mounting in front of a primary
frame which comprises two lenses and a bridge extending between
said lenses, wherein said shelter frame comprises: two spaced apart
shelter lenses, each of which generally having an inner side, an
outer side, a top side, and a bottom side, defining a control
distance between said two inner sides of said shelter lenses; and
two lens holders provided at said two outer sides of said shelter
lenses respectively; and a retractable arm extended between said
two inner sides of said shelter lenses for applying a retractable
force therebetween to adjust said control distance, wherein when
said shelter lenses are pulled away from each other to lengthen
said retractable arm for extending said control distance, said lens
holders are adapted for engaging with two outer sides of said
lenses of said primary frame, such that when said retractable arm
is retracted via said retractable force, said shelter lenses are
adapted for holding in front of said lenses respectively.
2. The shelter frame, as recited in claim 1, wherein said
retractable arm comprises a first member mounted to said inner side
of one of said shelter lenses, a second member mounted to said
inner side of another said shelter lens, and a retraction unit
coupling between said first and second members such that said
shelter lenses are adapted to be pulled away from each other to
extend said control distance.
3. The shelter frame, as recited in claim 2, wherein said first
member further comprises a front covering member sidewardly
extended from a free end thereof to cover said second member when
said first and second members are coupled end-to-end.
4. The shelter frame, as recited in claim 2, wherein said
retraction unit comprises an elongated control arm having an
affixing end portion affixed to said second member and a sliding
end portion slidably coupled with said first member, and a
resilient element coupling with said sliding end portion of said
control arm for applying said retractable force against said first
member to pull said first member towards said second member.
5. The shelter frame, as recited in claim 3, wherein said
retraction unit comprises an elongated control arm having an
affixing end portion affixed to said second member and a sliding
end portion slidably coupled with said first member, and a
resilient element coupling with said sliding end portion of said
control arm for applying said retractable force against said first
member to pull said first member towards said second member.
6. The shelter frame, as recited in claim 4, wherein said first
member lo comprises a tubular sleeve having a closed end mounting
to said inner side of said respective shelter lens and an opened
end extended towards said inner side of another said shelter lens,
wherein said sliding end portion of said control arm is slidably
received in said tubular sleeve to slidably engage said second
member with said first member.
7. The shelter frame, as recited in claim 5, wherein said first
member comprises a tubular sleeve having a closed end mounting to
said inner side of said respective shelter lens and said free end
is an opened end extended towards said inner side of another said
shelter lens, wherein said sliding end portion of said control arm
is slidably received in said tubular sleeve to slidably engage said
second member with said first member, wherein said front covering
panel covers a front side of said second member.
8. The shelter frame, as recited in claim 4, wherein said resilient
element comprises a compression spring coaxially mounted at said
sliding end portion of said control arm for applying said
retractable force against said second member when said second
member is pulled away from said first member.
9. The shelter frame, as recited in claim 5, wherein said resilient
element comprises a compression spring coaxially mounted at said
sliding end portion of said control arm for applying said
retractable force against said second member when said second
member is pulled away from said first member.
10. The shelter frame, as recited in claim 6, wherein said
retraction unit further comprises a retaining stopper disposed at
said opened end of said tubular sleeve to slidably engage with said
control arm, wherein said resilient element is disposed in said
tubular sleeve at a position that two ends of said resilient
element are biased against said retaining stopper and a stopper end
of said control arm such that said when said first and second
members are pulled away from each other to lengthen said control
distance, said resilient element is compressed between said
retaining stopper and said stopper end of said control arm.
11. The shelter frame, as recited in claim 9, wherein said
retraction unit further comprises a retaining stopper disposed at
said opened end of said tubular sleeve to slidably engage with said
control arm, wherein said resilient element is disposed in said
tubular sleeve at a position that two ends of said resilient
element are biased against said retaining stopper and a stopper end
of said control arm such that said when said first and second
members are pulled away from each other to lengthen said control
distance, said resilient element is compressed between said
retaining stopper and said stopper end of said control arm.
12. The shelter frame, as recited in claim 1, wherein said
retractable arm is extended between said shelter lenses for
aligning with said bridge of said primary frame when said shelter
lenses are held in front of said lenses respectively.
13. The shelter frame, as recited in claim 3, wherein said
retractable arm is extended between said shelter lenses for
aligning with said bridge of said primary frame when said shelter
lenses are held in front of said lenses respectively.
14. The shelter frame, as recited in claim 11, wherein said
retractable arm is extended between said shelter lenses for
aligning with said bridge of said primary frame when said shelter
lenses are held in front of said lenses respectively.
15. The shelter frame, as recited in claim 1, wherein each of said
lens holders comprises two spaced apart engaging hooks rearwardly
extended from said outer side of said respective shelter lens for
engaging with said outer side of said respective lens of said
primary frame.
16. The shelter frame, as recited in claim 3, wherein each of said
lens holders comprises two spaced apart engaging hooks rearwardly
extended from said outer side of said respective shelter lens for
engaging with said outer side of said respective lens of said
primary frame.
17. The shelter frame, as recited in claim 15, wherein each of said
engaging hooks has an elongated supporting arm rearwardly extended
from said outer side of said respective shelter lens and an edge
holder integrally extended from a rear end of said supporting arm
for engaging with a peripheral edge of said respective lens at said
outer side thereof.
18. The shelter frame, as recited in claim 16, wherein each of said
engaging hooks has an elongated supporting arm rearwardly extended
from said outer side of said respective shelter lens and an edge
holder integrally extended from a rear end of said supporting arm
for engaging with a peripheral edge of said respective lens at said
outer side thereof.
19. The shelter frame, as recited in claim 15, wherein each of said
engaging hooks has an elongated supporting arm rearwardly extended
from said outer side of said respective shelter lens and a lens
holder integrally extended from a rear end of said supporting arm
for engaging with a rear surface of said respective lens at said
outer side thereof.
20. The shelter frame, as recited in claim 16, wherein each of said
engaging hooks has an elongated supporting arm rearwardly extended
from said outer side of said respective shelter lens and a lens
holder integrally extended from a rear end of said supporting arm
for engaging with a rear surface of said respective lens at said
outer side thereof.
Description
CROSS REFERENCE OF RELATED APPLICATION
[0001] This is a Continuation application that claims the benefit
of priority under 35U.S.C..sctn.119 to a non-provisional
application, application Ser. No. 12/075,712, filed Mar. 12,
2008.
BACKGROUND OF THE PRESENT INVENTION
[0002] 1. Field of Invention
[0003] The present invention relates to spectacles frame, and more
particularly to a shelter frame, wherein a retractable arm of the
shelter frame is adapted for applying a retraction force between
two shelter lenses to securely engage two lens holders at two outer
sides of the lenses of the primary frame respectively so as to
stably mount the shelter lenses in front of the lenses
respectively.
[0004] 2. Description of Related Arts
[0005] Nowadays, wearing eyeglasses is not only for people to see
clearer, but also has become a symbol of personal style. Except for
fashion eyeglasses, the consumer puts more emphasis on their
function whether or not the eyeglasses are convenient and
comfortable for the consumer to wear. Because of greater diversity
and choice, the shelter frames have become more and more popular in
our daily lives. People usually can choose different looks, and
colors of their individual frames to match their outfits and
destinations. Therefore, the wearer does not need to carry a pair
of eyeglasses and a pair of sunglasses. However, most of the
sunglasses clipping claws are made of metal; it may scratch the
lenses of the primary eyeglasses when clipping on. Also, the wearer
must use both hands to align and engage the conventional clip-on
sunglasses on the primary eyeglasses in correct position. It is
troublesome and dangerous for a wearer to use both hands to wear
such clip-on sunglasses on the regular glasses while he or she is
driving.
[0006] In order to solve the problem of the above mentioned clip-on
sunglasses, the magnetic attachment has been recently introduced to
the eyeglasses industry. A primary pair of magnet members is
affixed on two side extensions of a primary spectacle frame.
However, the users have to align two pairs of magnet members. If
the auxiliary magnet members of the sunglasses are misaligned with
the primary magnet, the primary spectacle frame will fall down from
the primary spectacle frame easily. In the other hand, the major
drawback of the eyeglasses equipped with the magnet attachment is
that the primary spectacle frame needs to be altered its original
structural design in order to affix the magnet members thereon. So,
the wearer may have to buy a pair of spectacle frames including a
primary eyeglasses and an auxiliary sunglasses, which is much
expensive than that the wearer needs to buy the clip-on sunglasses
only
[0007] Moreover, some of the convenient spectacle frame provides
the attachment clipped closing by pushing together the center
nosepiece. However, the assembling area of the spectacle frame is
too small. It is obvious that it is not easy for people to assemble
the shelter frame for the spectacle. To sum up, it obviously can
not achieve the current needs based on the existing photo
album.
SUMMARY OF THE PRESENT INVENTION
[0008] A main object of the present invention is to provide a
shelter frame for spectacles, wherein a retractable arm of the
shelter frame is adapted for applying a retraction force between
two shelter lenses to securely engage two lens holders at two outer
sides of the lenses of the primary frame respectively so as to
stably mount the shelter lenses in front of the lenses
respectively.
[0009] Another object of the present invention is to provide a
shelter frame for spectacles, wherein the shelter frame is adapted
to be mounted on any kind of the primary spectacle frame without
any alternation of the primary spectacle frame.
[0010] Another object of the present invention is to provide a
shelter frame for spectacles, which does not require changing of
the original structural design of the primary spectacle frame, so
as to minimize the purchasing cost for the users.
[0011] Another object of the present invention is to provide a
shelter frame for spectacles, wherein the lens holders are engaged
with two outer sides of the lenses of the primary frame to maximize
a holding length of the shelter frame with respect to the primary
frame. In other words, the shelter frame is securely held by using
the width of the primary frame to retain the shelter frame in a
stably manner.
[0012] Another object of the present invention is to provide a
shelter frame for spectacles, wherein each of the lens holders is
made of plastic materials adapted for biasing against the outer
edges or the rear surfaces of the lenses in such a manner that the
lens holders are non-destructive to the lenses. As such, the lenses
will be kept intact while the shelter frame is detachably mounted
on the primary spectacles frame for shading sunlight.
[0013] Another object of the present invention is to provide a
shelter frame for spectacles, wherein the shelter frame is strong
in construction so as to prevent up and down movement or sideward
movement of the shelter frame with respect to the primary spectacle
frame.
[0014] Another object of the present invention is to provide a
shelter frame for spectacles, wherein the wearer may merely use one
hand to attach or detach the shelter frame during exercising or
driving.
[0015] Accordingly, in order to accomplish the above objects, the
present invention provides a shelter frame for mounting in front of
a primary spectacles frame which comprises a frame body mounting
two lenses in position, wherein the shelter frame comprises two
shelter lenses and two lens holders provided at two outer sides of
the shelter lenses respectively. The shelter frame further
comprises a retractable arm extended between two inner sides of the
shelter for applying a retractable force therebetween to adjust the
control distance, wherein when the shelter lenses are pulled away
from each other to lengthen the retractable arm for extending the
control distance, the lens holders are adapted for engaging with
two outer sides of the lenses of the primary frame, such that when
the retractable arm is retracted via the retractable force, the
shelter lenses are adapted for holding in front of the lenses
respectively.
[0016] These and other objectives, features, and advantages of the
present invention will become apparent from the following detailed
description, the accompanying drawings, and the appended
claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG. 1 is a perspective view of a shelter frame for a
primary frame according to a preferred embodiment of the present
invention.
[0018] FIG. 2 is a perspective view of the shelter frame for the
primary frame according to the above preferred embodiment of the
present invention, illustrating the pulling force applied at the
shelter frame.
[0019] FIG. 3 is a perspective view of the shelter frame for the
primary frame according to the above preferred embodiment of the
present invention, illustrating the shelter frame being partially
mounted in front of the primary frame.
[0020] FIG. 4 is a perspective view of the shelter frame for the
primary frame according to the above preferred embodiment of the
present invention, illustrating the shelter frame being mounted in
front of the primary frame.
[0021] FIG. 5 is a perspective view of the shelter frame according
to the above preferred embodiment of the present invention,
illustrating the control distance of the shelter frame being
increased.
[0022] FIG. 6 is a sectional view of the retractable arm of the
shelter frame according to the above preferred embodiment of the
present invention.
[0023] FIG. 7 is a sectional view of the retractable arm of the
shelter frame according to the above preferred embodiment of the
present invention, illustrating the control distance of the shelter
frame being increased.
[0024] FIG. 8 is an exploded perspective view of the shelter frame
according to the above preferred embodiment of the present
invention.
[0025] FIG. 9 is a top view of the shelter frame mounted in front
of the primary frame according to the above preferred embodiment of
the present invention, illustrating the lens holder engaging with
the outer edge of the primary frame.
[0026] FIG. 10 illustrates an alternative mode of the lens holder
according to the above preferred embodiment of the present
invention, illustrating the lens holder engaging with the rear
surfaces of the lenses of the primary frame.
[0027] FIG. 11 illustrates an alternative mode of the retractable
arm according to the above preferred embodiment of the present
invention.
[0028] FIG. 12 is a perspective view of the alternative retractable
arm according to the above preferred embodiment of the present
invention, illustrating the second member being slid away from the
front covering panel.
[0029] FIG. 13 is a perspective view of the alternative retractable
arm according to the above preferred embodiment of the present
invention, illustrating the second member being slid to hide behind
the front covering panel.
[0030] FIG. 14 is a perspective view of the shelter frame according
to the above preferred embodiment of the present invention,
illustrating the shelter frame incorporating with any shape of the
primary frame.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0031] Referring to FIG. 1 of the drawing, a shelter frame 20
according to a preferred embodiment of the present invention is
illustrated, wherein the shelter frame 20 is adapted for mounting
in front of a primary frame 10.
[0032] The primary frame 10 comprises a frame body 11 mounting two
lenses 12 in position, a bridge 13 extending between two inner
sides of the lenses 12, and two side extensions 14 extending from
two outer sides of the lenses 12. According to the preferred
embodiment, the shelter frame 20 comprises two shelter lenses 30,
two lens holders 40 provided at two outer sides of the shelter
lenses 30 respectively, and a retractable arm 50 extended between
the shelter lenses 30.
[0033] The two spaced apart shelter lenses 30 define a control
distance between two inner sides of the shelter lenses 30. The
retractable arm 50 is extended between two inner sides of the
shelter lenses 30 for applying a retractable force therebetween to
adjust the control distance, wherein when the shelter lenses 30 are
pulled away from each other to lengthen the retractable arm 50 for
extending the control distance, the lens holders 40 are adapted for
engaging with two outer sides of the lenses 12 of the primary frame
10, such that when the retractable arm 50 is retracted via the
retractable force, the shelter lenses 30 are adapted for holding in
front of the lenses 12 respectively.
[0034] Practically, the primary frame 10 can be constructed as a
conventional spectacles frame to have a pair of lens rims as shown
in FIG. 1 of the drawings, or a rimless frame that the primary
bridge 13 and the two side extensions 14 are directly fastened to
the edges of the two lenses 12. In other words, the primary frame
10 does not require modifying its original structure for mounting
the shelter frame 20 thereon. So, the shelter frame 20 of the
present invention fits for all kinds of conventional primary
spectacles frame. In other words, the user does not need to buy a
set of expensive primary spectacle frame and corresponding shelter
frame. The user can merely additionally purchase the shelter frame
20 of the present invention to fit his or her current spectacle
frame that he or she has originally.
[0035] According to the first preferred embodiment, as shown in
FIG. 1 to FIG. 4 of the drawings, the retractable arm 50 comprises
a first member 51 mounted to the inner side of one of the shelter
lenses 30, a second member 52 mounted to the inner side of another
shelter lens 30, and a retraction unit 53 coupling between the
first and second members 51, 52 such that the shelter lenses 30 are
adapted to be pulled away from each other to extend the control
distance.
[0036] According to the preferred embodiment as shown in FIGS. 6 to
8 of the drawings, the retraction unit 53 comprises an elongated
control arm 531 having an affixing end portion 5311 affixed to the
second member 52 and a sliding end portion 5312 slidably coupled
with the first member 51, and a resilient element 532 coupling with
the sliding end portion 5312 of the control arm 531 for applying
the retractable force against the first member 51 to pull the first
member 51 towards the second member 52.
[0037] Accordingly, the first member 51 comprises a tubular sleeve
511 having a closed end mounting to the inner side of the
respective shelter lens 30 and an opened end extended towards the
inner side of another shelter lens 30, wherein the sliding end
portion 5312 of the control arm 531 is slidably received in the
tubular sleeve 511 to slidably engage the second member 52 with the
first member 51.
[0038] According to the preferred embodiment, the resilient element
532 comprises a compression spring coaxially mounted at the sliding
end portion 5312 of the control arm 531 for applying the
retractable force against the second member 52 when the second
member 52 is pulled away from the first member 51. In the other
hand, the retraction unit 53 further comprises a retaining stopper
533 disposed at the opened end of the tubular sleeve 511 to
slidably engage with the sliding end portion 5312 of the control
arm 531, wherein the resilient element 532 is disposed in the
tubular sleeve 2311 at a position that two ends of the resilient
element 532 are biased against the retaining stopper 533 and a
stopper end 5313 of the control arm 531 such that when the first
and second members 51, 52 are pulled away from each other to
lengthen the control distance, the resilient element 532 is
compressed between the retaining stopper 533 and the stopper end
5313 of the control arm 531.
[0039] It is worth to mention that the control arm 531 has a
non-circular cross section to prevent the unwanted twisting
movement between the shelter lenses 30. Accordingly, a plurality of
guiding ridges are spacedly and radially protruded along the
sliding end portion 5312 of the control arm 531 to slidably engage
with guiding slots at an inner side of the retaining stopper 53.
Therefore, the sliding end portion 5312 of the control arm 531
cannot be rotated within the retaining stopper 533 but can only
slide through the retaining stopper 533.
[0040] The retractable arm 50 is extended between the shelter
lenses 30 for aligning with the bridge 13 of the primary frame 10
when the shelter lenses 30 are held in front of the lenses 12
respectively. Therefore, when the shelter frame 20 is mounted in
front of the primary frame 10, the bridge 13 is hidden behind the
retractable arm 50 to enhance the aesthetic appearance of the
shelter frame 20 with the primary frame 10.
[0041] Therefore, the retractable arms 50 of the shelter frame 20
of the present invention not only firmly attaches the shelter frame
20 in front of the primary frame 10 by the resilient element 532
compressing between the retaining stopper 533 and the stopper end
5313 of the control arm 531. It is important to point out that for
the conventional spectacle, the attachment clipped closed by
pushing together the center nosepiece such that the assembling area
of the spectacle is very limited and hard to operate. Compared to
all kinds of conventional primary spectacles frame, the shelter
frame 20 of the present invention, the engaging force of the
present embodiment can be applied to two lens holders 40 as opposed
to the nosepiece itself, making it much easier to assemble and more
secure.
[0042] According to the preferred embodiment, each of the lens
holders 40 comprises two spaced apart engaging hooks 41 rearwardly
extended from the outer side of the respective shelter lens 30 for
engaging with the outer side of the respective lens 12 of the
primary frame 10. As shown in FIGS. 1, 4 and 5, there are four
engaging hooks 41 provided at the outer sides of the shelter lenses
30 respectively. In other words, the outer side of each of the
shelter lenses 30 has two spaced apart engaging hooks 41. In
particularly, the two corresponding engaging hooks 41 are provided
at the upper and lower edges of the respective shelter lens 30 at
the outer side thereof. Therefore, when shelter frame 20 is mounted
in front of the primary frame 10, the engaging hooks 41 are engaged
with the four corner portions of the lenses 12 of the primary frame
10, such that the shelter frame 20 can be stably retained in
position.
[0043] As shown in FIG. 9, each of the engaging hooks 41 has an
elongated supporting arm 411 rearwardly extended from the outer
side of the respective shelter lens 30 and an edge holder 412
integrally extended from a rear end of the supporting arm 411 for
engaging with a peripheral edge of the respective lens 12 at the
outer side thereof. It is worth to mention that each of the
engaging hooks 41 is made of plastic materials and is made of
non-scratching material so as to prevent the lens 12 from being
scratched when the shelter frame 20 is mounted in front of the
primary spectacles frame 10.
[0044] Alternatively, each of the engaging hooks 41 A has an
elongated supporting arm 411 A rearwardly extended from the outer
side of the respective shelter lens 30 and a lens holder 412A
integrally extended from a rear end of the supporting arm 411A for
engaging with a rear surface of the respective lens 12 at the outer
side thereof, as shown in FIG. 10. It is worth to mention that the
engaging hook 41 and its alternative 41A can hold the shelter
lenses 30 in front of the lenses 12 in a stably manner by
maximizing the distance between two engaging hooks 41, 41A to match
with the width of the primary frame 10. In addition, the primary
frame 10 is embodied as a rimless spectacle frame.
[0045] In order to mount the shelter frame 20 in front of the
primary frame 10, the user is able to apply a pulling force at one
of the shelter lenses 30 to lengthen the control distance between
the inner sides of the shelter lenses 30, which also lengthen the
retractable arm 50, as shown in FIG. 2. Once the control distance
is increased, the distance between the lens holders 40 are
correspondingly increased. In other words, the distance between the
lens holders 40 is larger than the distance between the two outer
sides of the lenses 12 of the primary frame 10. Therefore, the user
is able to engage one of the lens holders 40 to the corresponding
outer side of the lens 12 of the primary frame 10 as shown in FIG.
3. Then, when the pulling force is released, the compressed
resilient element 532 is returned back to its original form to
reduce the control distance, as shown in FIG. 6. Therefore, another
lens holder 40 is engaged with the corresponding outer side of
another lens 12 of the primary frame 10 to hold the shelter lenses
30 in front of the lenses 12 of the primary frame 10 respectively,
as shown in FIG. 4.
[0046] FIGS. 11 to 13 illustrate an alternative mode of the
retractable arm 50B which has the same structure of the above
preferred embodiment. Accordingly, the retractable arm 50B has a
one-piece frontal side extended between the inner sides of the
shelter lenses 30 to enhance an appearance of the shelter frame 20.
As shown in FIGS. 11 and 12, the first member 51 further comprises
a front covering panel 501B sidewardly extended from the opened end
of the tubular sleeve 511 to cover a front side of the second
member 52 when the first and second members 51, 52 are coupled
end-to-end.
[0047] As shown in FIGS. 11 and 12, when the shelter lenses 30 are
pulled away from each other to lengthen the control distance, the
front covering panel 501B is slid along the front side of the
second member 52. Once the pulling force is released, the front
covering panel 501B is slid back to cover the front side of the
second member 52, as shown in FIG. 13. Therefore, the second member
52 is hidden behind the front covering panel 501B to form the
frontal side of the retractable arm 50B. Preferably, the front
covering panel 501B has a U-shaped cross section to receive the
second member 52 within the front covering panel 501B to enhance
the appearance of the shelter frame 20.
[0048] FIG. 14 illustrates the shelter frame 20 of the present
invention is adapted to incorporate with any shape of the primary
frame 10A. According to the preferred embodiment, the configuration
of each of the shelter lens 30 matches with the configuration of
the corresponding lens 12 such that the shelter lenses 30 are
fittingly cover at the front side of the lenses 12 respectively.
However, the retractable arm 50 provides the retractable force
between the shelter lenses 30 to securely retain the shelter frame
20 in front of the primary frame 10A even through the width of the
shelter frame 20 is different from the width of primary frame 10A
as shown in FIG. 14.
[0049] One skilled in the art will understand that the embodiment
of the present invention as shown in the drawings and described
above is exemplary only and not intended to be limiting.
[0050] It will thus be seen that the objects of the present
invention have been fully and effectively accomplished. The
embodiments have been shown and described for the purposes of
illustrating the functional and structural principles of the
present invention and is subject to change without departure from
such principles. Therefore, this invention includes all
modifications encompassed within the spirit and scope of the
following claims.
* * * * *