U.S. patent application number 14/202014 was filed with the patent office on 2014-07-03 for brush section for an electric toothbrush.
This patent application is currently assigned to BRAUN GMBH (A GERMAN CORPORATION). The applicant listed for this patent is BRAUN GMBH (A GERMAN CORPORATION). Invention is credited to Christopher Charles Blain, Phillip Maurice Braun, Mark Edward Farrell.
Application Number | 20140182071 14/202014 |
Document ID | / |
Family ID | 39493545 |
Filed Date | 2014-07-03 |
United States Patent
Application |
20140182071 |
Kind Code |
A1 |
Farrell; Mark Edward ; et
al. |
July 3, 2014 |
Brush Section For An Electric Toothbrush
Abstract
A brush section for use with an electric toothbrush includes a
relatively large brush head portion having a generally rectangular
shape, although oblong, elliptical and other such shapes having a
length to width aspect ration greater than 1 may be employed. The
brush head portion is secured to a shaft portion of the brush
section that may be configured to couple to a handle section. The
handle section may include an electric drive including drive shaft,
and the drive shaft may couple to the brush head via a coupling
member positioned within the shaft portion. The electric drive may
impart a rotary, oscillating rotary-oscillating or other suitable
drive motion to the drive shaft that is, in turn, imparted upon the
brush head by virtue of the coupling member.
Inventors: |
Farrell; Mark Edward;
(Medfield, MA) ; Blain; Christopher Charles;
(Petaluma, CA) ; Braun; Phillip Maurice; (Exeter,
RI) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BRAUN GMBH (A GERMAN CORPORATION) |
KRONBERG |
|
DE |
|
|
Assignee: |
BRAUN GMBH (A GERMAN
CORPORATION)
KRONBERG
DE
|
Family ID: |
39493545 |
Appl. No.: |
14/202014 |
Filed: |
March 10, 2014 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
13736259 |
Jan 8, 2013 |
8707496 |
|
|
14202014 |
|
|
|
|
13230957 |
Sep 13, 2011 |
8370984 |
|
|
13736259 |
|
|
|
|
12012068 |
Jan 31, 2008 |
8032964 |
|
|
13230957 |
|
|
|
|
60899280 |
Feb 2, 2007 |
|
|
|
Current U.S.
Class: |
15/22.1 ;
15/167.1 |
Current CPC
Class: |
A61C 17/3454 20130101;
A61C 17/3409 20130101; A61C 17/349 20130101; A61C 17/3418
20130101 |
Class at
Publication: |
15/22.1 ;
15/167.1 |
International
Class: |
A61C 17/16 20060101
A61C017/16; A46B 9/04 20060101 A46B009/04 |
Claims
1. A cleaning section for an electrical toothbrush with a handle
section, having a motor and a drive shaft, the cleaning section
comprising: a movable bristle holder structured to receive a drive
motion from the motor via a drive mechanism comprising a drive
shaft having a longitudinal axis, the drive shaft being structured
to oscillate around its longitudinal axis thereby imparting
rotation or oscillation to the movable bristle holder; a head
including a first plurality of cleaning bristles arranged in a
static bristle field which in use is static relative to the handle
section and a second plurality of cleaning bristles, wherein the
second plurality of cleaning bristles are supported within the
movable bristle holder; and an end extension portion including a
third plurality of cleaning bristles, the end extension portion
being coupled to the movable bristle holder; wherein the movable
bristle holder is movable with respect to the head and the static
bristle field such that a cleaning motion of the second and third
plurality of cleaning bristles includes a back and forth
oscillating movement of the second and third plurality of cleaning
bristles relative to the first plurality of cleaning bristles.
2. The cleaning section of claim 1, wherein the first plurality of
cleaning bristles are arranged in rows generally transverse to the
longitudinal axis.
3. The cleaning section of claim 1, wherein the first plurality of
cleaning bristles and the second plurality of cleaning bristles are
arranged in rows generally transverse to the longitudinal axis, the
rows of the first plurality of cleaning bristles and the rows of
the second plurality of cleaning bristles being interleaved.
4. The cleaning section of claim 1, wherein the first plurality of
cleaning bristles and the second plurality of cleaning bristles are
arranged in rows generally transverse to the longitudinal axis, the
rows being alternate rows of the first plurality of cleaning
bristles and the second plurality of cleaning bristles such that at
least some of the rows of the second plurality of cleaning bristles
are disposed between the rows of the first plurality of cleaning
bristles, and at least some of the rows of the first plurality of
cleaning bristles are disposed between the rows of the second
plurality of cleaning bristles.
5. The cleaning section of claim 1, wherein the first plurality of
cleaning bristles and the second plurality of cleaning bristles are
arranged in rows generally transverse to the longitudinal axis,
wherein every second row is a row of the first plurality of
cleaning bristles.
6. The cleaning section of claim 1, wherein the cleaning motion
comprises a reciprocating oscillation.
7. The cleaning section of claim 1, wherein the cleaning motion
comprises a rotational and translational motion of the second
plurality of cleaning bristles.
8. The cleaning section of claim 1, wherein the cleaning motion
comprises oscillation of the second plurality of cleaning bristles
about the longitudinal axis at a full oscillation angle of from
approximately 40 degrees to approximately 60 degrees.
9. The cleaning section of claim 8, wherein the full oscillation
angle is about 44 degrees.
10. The cleaning section of claim 8, wherein the full oscillation
angle is about 55 degrees.
11. The cleaning section of claim 1, wherein the cleaning motion
comprises an oscillation of the second plurality of cleaning
bristles at a frequency of from about 80 Hz to about 120 Hz.
12. An electric toothbrush comprising: a handle section including a
motor, the handle section being coupled with a cleaning section,
the cleaning section comprising a movable bristle holder structured
to receive a drive motion from the motor via a drive mechanism
comprising a drive shaft having a longitudinal axis, the drive
shaft being structured to oscillate around its longitudinal axis; a
head including a first plurality of cleaning bristles arranged in a
static bristle field which in use is static relative to the handle
section and a second plurality of cleaning bristles, wherein the
second plurality of cleaning bristles are supported within the
movable bristle holder; and an end extension portion including a
third plurality of cleaning bristles, the end extension portion
being coupled to the movable bristle holder; wherein the movable
bristle holder is movable with respect to the head and the static
bristle field such that a cleaning motion of the second and third
plurality of cleaning bristles includes a back and forth
oscillating movement of the second and third plurality of cleaning
bristles relative to the first plurality of cleaning bristles.
Description
BACKGROUND OF THE INVENTION
[0001] An electric toothbrush may incorporate a brush section that
couples to a handle section. A drive shaft may extend from the
handle section with the drive shaft being coupled to an electric
drive disposed within an interior of the handle section. The
electric drive may impart a rotary, oscillating or combined rotary
oscillating motion to the drive shaft so that the drive shaft is
movable in a rotary or oscillating manner. The brush section can
couple and secure to the handle section with the drive shaft
coupling to a coupling element of the brush section, e.g., a shaft
or drive pin. The motion of the drive shaft can be imparted upon
the coupling element to provide a desired cleaning action to a
brush head portion of the brush section.
[0002] A common arrangement for a brush section includes a
substantially circular brush head portion. The brush head is
caused, by action of the electric drive, to have a rotary or
rotary-oscillating motion, i.e., cleaning motion during cleaning
use. The circular brush head design combined with the cleaning
motion is very effective for cleaning teeth and is optimal when a
tooth-by-tooth cleaning pattern is used. Still, many consumers
enjoy taking a proactive role in their oral hygiene activity. At
times, the user will use the electric toothbrush with a manual
brushing action, e.g., using vertical or circular strokes. For the
electric toothbrush having a circular brush head design and
employing a rotary or rotary-oscillating cleaning motion, using
this electric toothbrush with a manual brushing action can be
counter productive and may reduce the effectiveness of the brush
head design and cleaning action. Ironically, the electric
toothbrush is rendered less effective while the consumer
erroneously believes the added action makes for a more effective
and/or expedited cleaning process. Furthermore, years of training
and conditioning have taught the consumer to use a circular or
vertical cleaning motion, and habits may be difficult to
change.
BRIEF DESCRIPTION OF THE DRAWINGS
[0003] While the specification concludes with claims particularly
pointing out and distinctly claiming the subject matter that is
regarded as the present invention, it is believed that the
invention will be more fully understood from the following
description taken in conjunction with the accompanying drawings.
Some of the figures may have been simplified by the omission of
selected elements for the purpose of more clearly showing other
elements. Such omissions of elements in some figures are not
necessarily indicative of the presence or absence of particular
elements in any of the exemplary embodiments, except as may be
explicitly delineated in the corresponding written description.
None of the drawings are necessarily to scale.
[0004] FIG. 1 is a schematic top view of a brush section in
accordance with one embodiment.
[0005] FIG. 2 is a schematic partial top view of a brush head
portion of the brush section illustrated in FIG. 1.
[0006] FIG. 3 is a schematic cross-section view of the brush head
portion illustrated in FIG. 2.
[0007] FIG. 4 is a schematic top view of the brush head portion of
FIG. 2 with the cleaning element fields removed for visual
facilitation.
[0008] FIG. 5 is a schematic partial perspective view of a brush
section in accordance with another embodiment.
[0009] FIG. 6 is a schematic partial (bottom) perspective view of a
brush head portion of the brush section illustrated in FIG. 5.
[0010] FIG. 7 is a schematic partial (bottom) perspective view of
the brush head portion of FIG. 6 with the contact element holder
portions removed for visual facilitation.
[0011] FIG. 8 is a schematic partial perspective view of an
alternative brush head arrangement.
[0012] FIG. 9 is a schematic partial perspective view of a further
alternative brush head arrangement.
[0013] FIG. 10 is a schematic partial perspective view of a still
further alternate brush head arrangement.
[0014] FIG. 11A is a schematic exploded view of a drive system
suitable for use in the present invention.
[0015] FIG. 11B is a schematic exploded view of the drive system of
FIG. 11A.
[0016] FIGS. 12A and 12B are schematic elevation views showing an
output system suitable for use in the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0017] A brush section for use with an electric toothbrush includes
a brush head portion which may have a generally rectangular shape,
although oblong, elliptical, or any suitable shape may be employed.
Generally, the brush head portion may have a length-to-width aspect
ratio greater than 1, although such an arrangement is not required.
The brush head portion is secured to a tube member of the brush
section that may be configured to couple to a handle section. The
handle section may include an electric drive including a drive
shaft, and the drive shaft may couple to the brush head via a
coupling or drive pin member positioned within the tube member. In
some embodiments, the electric drive may impart a rotary,
oscillating, rotary-oscillating or other suitable drive motion to
the drive shaft that is, in turn, imparted upon the brush head and
bristle members thereof by virtue of the coupling member.
[0018] The brush head may incorporate a first plurality of cleaning
bristles that are static, i.e., fixed relative to the brush head
and a second plurality of cleaning bristles that are moveable in a
cleaning motion relative to the first plurality of bristles. For
example, the second plurality of cleaning bristles may include a
bristle support structure or bristle holder that is supported
within the brush head to have at least one direction of freedom to
move relative to the brush head and the first plurality of
bristles. In one embodiment, the bristle support structure may be
free to pivot about a first axis relative to the brush head. The
coupling member couples the bristle support structure to the
electric drive for driving the bristle support structure causing
the second plurality of bristles to have the desired cleaning
motion. The bristle support structure may comprise a plurality of
separate bristle support structures such that each structure may
move independently with respect to each other separate bristle
support structure. Furthermore, the cleaning motion may include an
eccentric motion or translational motion in combination with a
rotary, oscillating or other suitable cleaning motion.
[0019] It will be understood and appreciated that while various
aspects, features and advantages of the invention are described in
connection with particular embodiments, the herein described
aspects, features and advantages may be implemented in any of the
embodiments, and as such, the features and structures of the
various embodiments may be mixed and matched yielding a virtually
limitless number of combinations. One of skill in the art will
furthermore appreciate that the herein described aspects, features
and advantages of the invention may be combined with structures and
devices known to or later discovered by the skilled artisan.
[0020] The herein described embodiments of brush sections are
suited to operate in conjunction with an electric toothbrush, such
for example, as an electric toothbrush of the type having a handle
section including an electric drive and a drive shaft having a
longitudinal axis. The electric drive imparts a motion to the drive
shaft. It may, for example, impart a rotary, oscillating, or rotary
and oscillating motion to the drive shaft. The motion of the drive
shaft is coupled to the brush section to impart a desired motion to
a brush head portion of the brush section such that the brush head
portion, or any component thereof, is caused to have a desired
cleaning motion. Many different kinds of cleaning motions,
including rotary, oscillating, vertical and/or horizontal sweeping
and the like, may be used. Generally, as used herein, cleaning
motion describes any desired or effective movement of the bristles
relative to the brush head to affect cleaning. Handle sections, as
described above, are well known to the skilled artisan. In
addition, the brush sections may be configured for use with such
existing handle sections or may be configured with new handle
sections types, as the case may be.
[0021] FIGS. 1-3 illustrate a brush section 10 which may be
push-fitted onto a toothbrush handle section and coupled to the
drive shaft of the handle section, such for example, as a handle
section described above. The brush section includes a mounting tube
12 extending along an axis 14. The axis 14 is a longitudinal axis
of the cleaning section and may coincide with a longitudinal
section of the drive shaft 38 (FIG. 3). At a first end 16 (FIG. 1),
the mounting tube 12 may include a profile ring 18 having an inside
contour complementary with an outside contour of the handle
section. In this manner, the brush section 10 can be push-fitted
onto the handle section in a manner preventing relative rotation of
the brush section with respect to the handle section. A tab/slot,
key/spline or other similar structure may be included in the
corresponding contour surfaces to facilitate alignment of the brush
section with the handle section and to further prevent relative
rotation between the two.
[0022] At a second end 20 the brush section 10 includes a brush
head portion 22. In some embodiments, the brush head portion 22
supports a first plurality of contact elements 24 that are mounted
to the head portion 22 so as to be fixed, i.e., they are static
relative to the head portion 22. Any suitable method of mounting
the first plurality of contact elements 24 to the head portion 22
may be used. For example, where the contact elements 24 comprise a
plurality of bristles, methods, such as hot tufting, gluing,
stapling, and the like, may be utilized. As another example, where
the contact elements 24 comprise a plurality of elastomeric
elements, methods such as gluing, snap-fitting, welding, molding,
etc. may be utilized.
[0023] Supported within the head portion 22 is a movable contact
element support or moveable contact element holder 26 supporting a
second plurality of contact elements 28. The second plurality of
contact elements 28 may be mounted to the movable contact element
holder 26 using any suitable method, as described above with regard
to the first plurality of contact elements 24. The movable contact
element holder 26 may be supported within the head portion 22 such
that it is able to rotate about the longitudinal axis 14 responsive
to a suitable driving input from the handle section.
[0024] The first plurality of contact elements 24 may have a first
height and the second plurality of contact elements 28 may have a
second height, different than the first height. Additionally, the
ends of the first and second pluralities of contact elements 24 and
28 may have contoured, rounded or otherwise shaped ends. Among the
first plurality of contact elements 24 and the second plurality of
contact elements 28, contact elements or tufts of bristles (in
embodiments where the contact elements comprise a plurality of
bristles) at different locations of the head portion 22, e.g. front
to back and/or center to edge, may also have different heights and
different bristle end contours.
[0025] The first plurality of contact elements 24 may be arranged
in rows transverse relative to the axis 14. Similarly, the second
plurality of contact elements 28 may be arranged in rows transverse
relative to the axis 14. In some embodiments, the transverse rows
may alternate between rows of first plurality of contact elements
24 and rows of second plurality of contact elements 28. In some
embodiments, multiple rows of the first plurality of contact
elements may be separated by a row or multiple rows of the second
plurality of contact elements 28 and vice versa or the rows may be
interleaved or arranged in virtually any manner.
[0026] As shown in FIG. 3, in some embodiments, the head portion 22
may include a first bearing surface 30 that engages a recess,
notch, slot or other suitable formation 32 formed in the movable
contact element holder 26. As shown, in some embodiments, the
recess, notch, slot, or other suitable formation 32 may be disposed
between the second plurality of contact elements 28 and a third
plurality of contact elements 46.
[0027] A drive shaft 38 may engage the movable contact element
holder 26 such that movement of the drive shaft 38 can be
transferred to the movable contact element holder 26. The drive
shaft 38 may be supported within the mounting tube 12 at a rearward
end 40 of the head portion 22. The drive shaft 38 may be joined to
the contact element holder 26 via any suitable means. For example,
as shown, the drive shaft 38 may be joined to the movable contact
element holder 26 via a drive pin 36. As yet another example, the
drive shaft 38 may be joined to the movable contact element holder
26 adhesively, chemically, mechanically, electrically, e.g.
magnetic clutch, or any combination thereof. In some embodiments,
the drive pin 36 may be inserted into the movable contact element
holder 26 and/or the drive shaft 38 via corresponding apertures in
the movable contact holder 26 and/or drive shaft 38.
[0028] As shown in FIG. 4, the movable contact element holder 26
(shown in FIGS. 1-3) may be snap-fitted into the head portion 22
via an opening 42. The opening 42 may then be closed with a
snap-in-place housing member (not depicted).
[0029] In the embodiment shown in FIGS. 1-3, the movable contact
element holder 26 may include an extension portion 44 supporting
the third plurality of contact elements 46. The extension portion
44 may be supported to permit at least one freedom of motion
relative to the head portion 22. For example, the extension portion
44 may be supported to rotate relative to the head portion 22. In
this manner, the third plurality of contact elements 46 may move in
a cleaning motion relative to the first plurality of contact
elements 24 and/or the second plurality of contact elements 28. For
example, the extension portion 44 may couple to the movable bristle
holder 26 such that the third plurality of contact elements 46
moves in a similar manner as the second plurality of contact
elements 28.
[0030] In other embodiments, the brush head portion 22 comprises
the extension portion 44 and the third plurality of contact
elements 46. In such embodiments, the third plurality of contact
elements 46 may be stationary with respect to the brush head
portion 22.
[0031] Referring back to FIG. 3, in some embodiments, the coupling
between the extension portion 44 and the movable contact element
holder 26 may be direct such that the extension portion 44 moves
with the movable contact element holder 26. However, in some
embodiments, the extension portion 44 may couple to the drive pin
38, directly, via a cam arrangement, a linkage or otherwise, and/or
to the movable contact element holder 26 or otherwise such that the
extension portion 44 has a cleaning motion that is separate from a
cleaning motion of the movable contact element holder 26 and the
second plurality of contact elements 28.
[0032] In the embodiment shown if FIGS. 1-3, the movable contact
element holder 26 may oscillate about the axis 14 thereby causing
the second plurality of contact elements 28 and/or the third
plurality of contact elements 46 to similarly oscillate about the
axis 14. The movement of the movable contact element holder 26 may
cause the second plurality of contact elements 28 and/or the third
plurality of contact elements 46 to oscillate back and forth
angularly to provide a cleaning action substantially similar to an
up-down manual brushing action.
[0033] The amount of angular movement as well as the speed
exhibited by the movable contact element holder 26 and the second
plurality of contact elements 28 and/or the third plurality of
contact elements 46 can impact the efficacy of the cleaning action.
Generally, oscillation angle within the range of 40-60 degrees is
considered beneficial. For example, the movable contact element
holder 26 may move through an angle of about 44 degrees, i.e.,
+/-22 degrees relative to the head portion 22, in some embodiments.
Another example includes 55 degrees angle. However, any suitable
angle may be utilized. For example, other angles greater than 55
degrees or less than 44 degrees may be used.
[0034] In some embodiments, the movable contact element holder 26
can move through an angle of from about 10 degrees to about 90
degrees, or any individual number within the range. In some
embodiments, the movable contact element holder 26 can move through
an angle greater than about 10 degrees, greater than about 12
degrees, greater than about 15 degrees, greater than about 18
degrees, greater than about 20 degrees, greater than about 22.5
degrees, greater than about 25 degrees, greater than about 30
degrees, greater than about 35 degrees, greater than about 40
degrees, greater than about 45 degrees, greater than about 50
degrees, greater than about 55, greater than about 60 degrees,
greater than about 65 degrees, greater than about 70 degrees,
greater than about 75 degrees, greater than about 80 degrees,
greater than about 85 degrees, and/or less than about 90 degrees,
less than about 85 degrees, less than about 80 degrees, less than
about 75 degrees, less than about 70 degrees, less than about 65
degrees, less than about 60 degrees, less than about 55 degrees,
less than about 50 degrees, less than about 45 degrees, less than
about 40 degrees, less than about 35 degrees, less than about 30
degrees, less than about 25 degrees, less than about 22.45 degrees,
less than about 20 degrees, less than about 18 degrees, less than
about 15 degrees, less than about 12 degrees, or less than about 10
degrees.
[0035] As stated above, the speed at which the movable contact
element holder 26 and the second plurality of contact elements 28
and/or the third plurality of contact elements 46 move through
their angular movement may also impact the efficacy of the cleaning
action. For example, a speed of about 75 Hz may provide adequate
cleaning where the movable contact element holder 26 moves through
an angle of about 44 degrees. In general, where the movable contact
element holder 26 moves through a smaller angle, the speed at which
the movable contact element holder 26 moves through the angle may
increase in order to maintain cleaning efficacy.
[0036] The movable contact element holder 26 may move through its
respective angle at a speed ranging from between about 30 Hz to
about 130 Hz, or any individual number within the range. In some
embodiments, the movable contact element holder 26 may move through
its respective angle at a speed of greater than about 30 Hz,
greater than about 40 Hz, greater than about 50 Hz, greater than
about 60 Hz, greater than about 70 Hz, greater than about 80 Hz,
greater than about 90 Hz, greater than about 100 Hz, greater than
about 110 Hz, greater than about 120 Hz, and/or less than about 130
Hz, less than about 120 Hz, less than about 110 Hz, less than about
100 Hz, less than about 90 Hz, less than about 80 Hz, less than
about 70 Hz, less than about 60 Hz, less than about 50 Hz, or less
than about 40 Hz.
[0037] Advantageously, with the movement of the second plurality of
contact elements 28 and/or the movement of the third plurality of
contact elements 46, and a manually imparted cleaning movement of
the overall head portion 22, the user may experience an enhanced
and effective cleaning action. Furthermore, instead of the user's
manual manipulation of the toothbrush incorporating the brush
section 10 drawing away from, and degrading, the driven cleaning
action, the two actions may combine to provide an enhanced cleaning
affect. Also, in the event that the handle section becomes
discharged and thus the electric drive becomes disabled, the brush
section 10 may be easily used in the same manner as a manual
toothbrush to affect cleaning.
[0038] In some embodiments, the brush section 10 may comprise a
transponder, and the handle section may comprise a detector or a
reading device as described in U.S. Patent Application Publication
Nos. 2004/0255409 and 2003/0101526. The transponder can be
configured to communicate information about the brush section 10 to
the detector or reading device. The reading device or detector can
be in signal communication with a controller which may be
configured to control the speed of a motor and/or the angular
motion of a shaft of the motor. The basic architecture of a
controller, reading device, detector, and/or transponder is
generally known.
[0039] The speed of the motor as well as the angle which of
oscillatory shaft displacement can be controlled in any suitable
manner. For example, one means of modifying the speed of the motor
is to increase or decrease the voltage to the motor. Typically, an
increase in voltage will increase the speed of the motor while a
decrease in voltage will decrease the speed of the motor. Such
mechanisms for modifying the voltage delivered to motors are well
known. As another example, the speed of the motor may be modified
via a transmission system.
[0040] FIGS. 11A and 11B illustrate one embodiment of a
transmission system. A transmission system 1500 may comprise a
drive system 1501. The drive system 1501 may comprise a motor 1100
having a shaft 1102. The shaft 1102 may be operatively connected to
a first driver 1126 and/or a second driver 1116. In a first
configuration, the teeth of the first driver 1126 may be
intermeshed with teeth from a plurality of planetary gears 1120,
1122, and/or 1124. In a second configuration, the teeth of the
second driver 1116 may be intermeshed with teeth from a plurality
of planetary gears 1110, 1112, and/or 1114.
[0041] As shown, the first driver 1126 and/or the second driver
1116 as well as their respective planetary gears may be disposed on
a gear carrier 1106. The planetary gears may be rotatably connected
to the gear carrier 1106.
[0042] A ring gear 1130 may comprise complementary teeth to those
of the planetary gears. As such, the teeth of the ring gear 1130
may intermesh with the teeth of the planetary gears. In some
embodiments, an output shaft 1136 may be operatively connected to
the ring gear 1130. In such embodiments, the ring gear 1130 may be
driven at various speeds depending on the size of the driver gear
and its respective planetary gears. For example, as shown, the
first driver 1126 may have a smaller diameter than the second
driver 1116. As such, the corresponding planetary gears, e.g. 1120,
1122, and/or 1124 may have larger diameters than the first driver
1126. So, in the first configuration, for a predetermined
rotational speed of the motor shaft 1102, the ring gear 1130 may
have a rotational speed which is less than the rotational speed of
the motor shaft 1102. In contrast, in the second configuration, for
a predetermined rotational speed of the motor shaft 1102, the ring
gear 1130 may have a rotational speed which is greater than the
rotational speed of the motor shaft 1102. In the second
configuration, the second driver 1116 may have a diameter which is
greater than the diameter of its respective planetary gears, e.g.
1110, 1112, and/or 1114. The selection of the first driver 1126
and/or the second driver 1116 may be created via a clutch system or
any other suitable means.
[0043] In some embodiments, the first driver 1126 and/or the second
driver 1116 may be operatively connected to the output shaft 1136.
In such embodiments, the ring gear 1130 may be driven by the shaft
1102 while the gear carrier 1106 remains stationary. Alternatively,
the gear carrier 1106 may be driven by the shaft 1102 while the
ring gear 1130 remains stationary.
[0044] Additionally, as stated previously, the angle may be
modified in any suitable manner. For example, as shown in FIGS. 12A
and 12B, the transmission system 1500 may further comprise an
output system 1502. Embodiments are contemplated where devices of
the present invention include the drive system 1501 and/or the
output system 1502.
[0045] As shown in FIGS. 12A and 12B, the output system 1502 may
comprise a shaft 1202, a first driver linkage 1240, a first driven
linkage 1260, a second driver linkage 1250, a second driven linkage
1270, and an output shaft 1236. The shaft 1202 may be operatively
connected to a motor such that the shaft 1202 is driven by the
motor. The first driver linkage 1240 and the second driver linkage
1250 may be connected to the shaft 1202 such that the first driver
linkage 1240 and the second driver linkage 1250 are capable of
rotating with respect to the shaft 1202.
[0046] The first driver linkage 1240 may be pivotally connected to
the first driven linkage 1260 via pin 1238, in some embodiments.
Similarly, the second driver linkage 1250 may be pivotally
connected to the second driven linkage 1270 via a pin, in some
embodiments.
[0047] The first driven linkage 1260 comprises at least one
engagement element 1262 which is capable of intermeshing with a
first receiving element 1264. As shown, the engagement element 1262
may comprise a tooth, and the receiving element 1264 may comprise a
recessed area for receiving the tooth of the engagement element
1262. The receiving element 1264 may be fixed to the output shaft
1236 such that rotational motion imparted to the receiving element
1264 may thereby be transferred to the output shaft 1236.
[0048] Similarly, the second driven linkage 1270 may comprise at
least one engagement element 1272 which is capable of intermeshing
with a second receiving element 1274.
[0049] The at least one engagement element 1272 of the second
driven linkage 1270 and the second receiving element 1274 may be
configured as described above with regard to the engagement element
1262 and receiving element 1264. The second receiving element 1274
may be fixed to the output shaft 1236 such that rotational motion
imparted to the second receiving element 1274 may be transferred to
the output shaft 1236.
[0050] The first driver linkage 1240 and the first driven linkage
1260 may have different lengths in order to impart a particular
angular displacement to the output shaft 1236. In some embodiments,
the first driver linkage 1240 and the first driven linkage 1260 may
have equal lengths. The second driver linkage 1250 and the second
driven linkage 1270 may be similarly configured. The analysis of
the relative lengths of the linkages to achieve a particular
displacement is founded on principles which are generally well
known, e.g. four bar linkage analysis.
[0051] As shown in FIG. 12A, when the first engagement element 1262
is engaged with the first receiving element 1264, the output shaft
1236 may have a first angular displacement. The first angular
displacement may be similar to the angular displacement described
heretofore. In this configuration, the second engagement element
1272 may be disengaged with the second receiving element 1274.
[0052] As shown in FIG. 12B, when the second engagement element
1272 is engaged with the second receiving element 1274, the output
shaft 1236 may have a second angular displacement. The second
angular displacement may be similar to the angular displacement
described heretofore. However, the first angular displacement may
be different from the second angular displacement. For example, the
first angular displacement may be greater than the second angular
displacement. As another example, the first angular displacement
may be less than the second angular displacement.
[0053] Referring to FIGS. 5-6 another embodiment of a brush section
110 is shown. Like elements of the brush section 110 to those of
the brush section 10 are indicated using a reference numeral
incremented by 100. The brush section 110 includes a mounting tube
112 extending along an axis 114. At a first end (not depicted), the
mounting tube 112 is adapted to be push-fitted onto a handle
section in a manner preventing relative rotation, as discussed
previously with regard to the mounting tube 12.
[0054] At a second end 120 the brush section 110 includes a brush
head portion 122. The brush head portion 122 supports a first
plurality of contact elements 124 that are mounted to the head
portion 122 so as to be fixed, i.e., static relative to the head
portion 122. Any suitable method of mounting the first plurality of
contact elements 124 to the head portion 122 may be used, such as
those methods discussed heretofore with regard to the first
plurality of contact elements 24. Supported within the head portion
122 is a movable contact element support or moveable contact
element holder 126 supporting a second plurality of contact
elements 128. The second plurality of contact elements 128 may be
mounted to the movable contact element holder 126 using any
suitable method, such as those discussed heretofore with regard to
the second plurality of contact elements 28. The movable contact
element holder 126 may be supported within the head portion 122
such that the movable contact element holder 126 is able to rotate
about the axis 114 responsive to a suitable driving input from a
handle section.
[0055] The first plurality of contact elements 124 may have a first
height and the second plurality of contact elements 128 may have a
second height, different than the first height. Additionally, the
ends of the first and second pluralities of contact elements 124
and 128 may have contoured, rounded or otherwise shaped ends. Among
the first plurality of contact elements 124 and the second
plurality of contact elements 128, contact elements at different
locations of the head portion 122 front to back and center to edge
may also have different heights and different end contours. The
first plurality of contact elements 124 may be arranged in rows
transverse relative to the axis 114. Similarly, the second
plurality of contact elements 128 may be arranged in rows
transverse relative to the axis 114.
[0056] As shown in FIG. 6, the movable contact elements holder 126
may include a plurality of separately moveable contact element
holder portions 150, each supporting a portion of the second
plurality of contact elements 128. For example, each contact
element holder portion 150 may support a separate transverse row of
the second plurality of contact elements 128. The drive shaft 138
may extend through the head portion 122 and may be rotatably
supported in an end member 154. The drive shaft 138 can be adapted
to engage a drive member of a handle portion to which the brush
section 110 is configured to operatively couple. Each movable
contact element holder portion 150 may couple to the drive shaft
138 such that oscillation of the drive shaft 138 causes a like
oscillation of the respective contact element portion 150. Each
contact element holder portion 150 may be snap-fitted into the head
portion 122 via an aperture 142 (shown in FIG. 7) and engaged with
the drive shaft 138. A housing member (not depicted) may be
provided to enclose the aperture 142. Additionally, the contact
element holder portions 150 may be snap-fitted from a front side of
the head portion 122.
[0057] As noted, each contact element holder portion 150 may be
linked directly to the drive shaft 138 and thus to have an
oscillating angular cleaning motion. Alternatively, at least some
of the contact element holder portions 150 may be coupled by a
linkage, cam structure or the like such that the contact element
holder portion 150 has a cleaning motion separate from a rotating
motion of the drive shaft 138 and/or a separate cleaning motion
from other contact element holder portions 150.
[0058] In the embodiment shown if FIGS. 5-7, each of the second
plurality of contact elements 128 may be driven to oscillate back
and forth angularly about the axis 114 to provide a cleaning action
simulating an up-down manual brushing action. The second plurality
of contact elements 128 may move through an angle of about 44
degrees, +/-22 degrees relative to the head portion 122. However,
other angles greater than 44 degrees or less than 44 degrees may be
used. In the embodiments described in FIGS. 5-7, any suitable angle
may be utilized similar to those disclosed heretofore with regard
to FIGS. 1-4.
[0059] In a similarly advantageous manner, the cleaning movement of
the second plurality of contact elements 128 and a manually
imparted cleaning movement of the head portion 122 by the user may
provide an enhanced and effective cleaning action without drawing
away from or degrading the driven cleaning action. The brush
section 110 is also easily used in the same manner as a manual
toothbrush to affect cleaning.
[0060] It is noted with respect to the brush section 110 that at
least some of the contact element holder portions 150 may be
separately coupled to the drive shaft 138 via a linkage, cam or
similar structure to have a cleaning motion separate from a
oscillating motion of the drive shaft 138. For example, as shown in
FIG. 8, the drive shaft 138 may comprise a plurality of cams 160
offset from or eccentric relative to the axis 114. In some
embodiments, each bristle holder portion 150 may be rotatably
supported by engagement of a circular aperture 162 with a pin 166
formed on a static bristle support 164, a plurality of which,
potentially corresponding to the number of rows of the first
plurality of bristles 124, may be formed on the head section 122.
Each cam 160 may engage a slot 168 formed in the bristle support
portion 150 such that rotation of the drive shaft 138 causes a back
and forth angular rotation of the bristle support portion 150 and
the associated second plurality of bristles 128. Arrangement of the
cams 160 on the drive shaft 138 permits each bristle holder portion
150 to have a separate rotating motion, which may enhance the
cleaning action of the head section 122.
[0061] Advantageously, a complex drive motion of the drive shaft
138 may be avoided, as it may be driven in rotation with the action
of the cam 160 engaging the bristle support portion 150 to provide
the desired cleaning motion for the second plurality of bristles
128. For example, some embodiments may utilize a drive shaft which
oscillates back and forth about the axis 114 to achieve the
oscillatory motion of the first plurality of contact elements, the
second plurality of contact elements, and/or the third plurality of
contact elements. As yet another example, some embodiments, may
utilize a drive shaft which rotates about the axis 114 to achieve
the oscillatory motion of the first plurality of contact elements,
the second plurality of contact elements, and/or the third
plurality of contact elements.
[0062] As shown in FIG. 9, an alternate arrangement of the bristle
holder portions 150, designated as bristle holder portions 150' is
contemplated. As shown, each bristle holder portion 150' may be
rotatably supported on the pin 166. However, instead of being
formed with a circular aperture 162 (shown in FIG. 8), the bristle
holder portion 150' may be formed with a slot 162' which engages
the pin 166. Additionally, the slot 168 (shown in FIG. 8) may be
formed as a circular opening 168' within which the cam 160 rotates
with rotation of the drive shaft 138. Rotation of the drive shaft
138 causes a back and forth angular rotation of the bristle support
portion 150' and the associated second plurality of bristles 128.
Additionally, the bristle support portions 150' may be driven
linearly along the slot 162' relative to the axis 114. This
arrangement of bristle support portions 150' permits each bristle
holder portion 150' to have a rotating and translating motion,
which may enhance the cleaning action of the head section 122.
Also, arrangement of the cams 160 on the drive shaft 138 may allow
each individual bristle holder portion 150' to have a motion
separate and distinct from each other bristle holder portion 150'.
The resulting relatively complex cleaning motion may be imparted to
the second plurality of bristles 128 without a complex drive motion
of the drive shaft 138, which may be driven in rotation.
[0063] FIG. 10 illustrates yet another alternate arrangement of the
bristle holder portions 150, designated as bristle holder portions
150''. Each bristle holder portion 150'' may be formed with an
arcuate slot 162'' that engages a corresponding pin 166 formed on a
static bristle support. The drive shaft 138 may include eccentric
cams such that rotation of the drive shaft 138 may provide rotating
and translating motion of the bristle holder portions 150'' via
engagement of the drive shaft 138 with the respective bristle
holder portions 150''. Additionally, this arrangement may provide
separate and distinct rotational and translation motion for each
bristle holder portion 150'' without a complex drive motion of the
drive shaft 138.
[0064] As described, the various arrangements of a bristle holder
portion, e.g., 150, 150' and 150', etc., permit relatively complex
rotational and translational cleaning motions to be imparted to the
second plurality of bristles 128. This may be accomplished with a
simple rotating motion of the drive shaft 138 making brush sections
110 incorporating these configurations easily adaptable to existing
handle section designs that may provide only for a rotating drive
shaft output.
[0065] The first plurality of contact elements 24, the second
plurality of contact elements 28, and/or the third plurality of
contact elements 46 of the present invention may comprise a wide
variety of materials and may have a number of different
configurations. Any suitable material and/or any suitable
configuration may be utilized.
[0066] For example, in some embodiments, the first plurality of
contact elements 24, the second plurality of contact elements 28,
and/or the third plurality of contact elements 46, may comprise
tufts. The tufts may comprise a plurality of individual filaments
which are securely attached to a cleaning element carrier. Such
filaments may be polymeric and may include polyamide or polyester.
The longitudinal and cross sectional dimensions of the filaments of
the invention and the profile of the filament ends can vary.
Additionally, the stiffness, resiliency and shape of the filament
end can vary. Some examples of suitable dimensions include a length
between about 3 cm to about 6 cm, or any individual number within
the range. Additionally, the filaments may include a substantially
uniform cross-sectional dimension of between about 100 to about 350
microns, or any individual number within the range. The tips of the
filaments may be any suitable shape, examples of which include a
smooth tip, a rounded tip, a pointed tip. In some embodiments, the
filaments may include a dye which indicates wear of the filaments
as described in U.S. Pat. No. 4,802,255. Other suitable examples of
filaments are described in U.S. Pat. No. 6,018,840. In some
embodiments, the cleaning element fields may comprise fins as
described in U.S. Pat. No. 6,553,604; U.S. Patent Application
Publication No. 2004/0177462; 2005/0235439; and 2005/0060822. In
some embodiments, the cleaning element fields may comprise a
combination of fins and tufts.
[0067] Additionally, at least a portion of some of the first
plurality of contact elements 24, the second plurality of contact
elements 28, and/or the third plurality of contact elements 46 may
be attached to a cleaning element carrier at an angle. Such
orientations are described in U.S. Pat. No. 6,308,367. Also, any
suitable method may be utilized to attach the first plurality of
contact elements 24, the second plurality of contact elements 26,
and/or the third plurality of contact elements 46 to their
respective structures.
[0068] Embodiments are contemplated where the mounting tube 12, 112
(shown in FIGS. 1-3 and 5-9, respectively, is angled with respect
to the handle section. In such embodiments, the drive shaft of the
present invention may be provided in discrete portions thereby
accommodating the angle of the mounting tube 12, 112. For example,
the drive shaft may include one or more universal joints. As yet
another example, the drive shaft may be constructed from a
compliant material. Some examples of suitable materials for
construction of the drive shaft include aluminum, spring steel,
plastics, e.g. delrin, nylon, polypropylene, and/or combinations
thereof.
[0069] The dimensions and values disclosed herein are not to be
understood as being strictly limited to the exact numerical values
recited. Instead, unless otherwise specified, each such dimension
is intended to mean both the recited value and a functionally
equivalent range surrounding that value. For example, a dimension
disclosed as "40 mm" is intended to mean "about 40 mm".
[0070] All documents cited in the Detailed Description of the
Invention are, in relevant part, incorporated herein by reference;
the citation of any document is not to be construed as an admission
that it is prior art with respect to the present invention. To the
extent that any meaning or definition of a term in this document
conflicts with any meaning or definition of the term in a document
incorporated by reference, the meaning or definition assigned to
the term in this written document shall govern.
[0071] While particular embodiments of the present invention have
been illustrated and described, it would be obvious to those
skilled in the art that various other changes and modifications can
be made without departing from the spirit and scope of the
invention. It is therefore intended to cover in the appended claims
all such changes and modifications that are within the scope of
this invention.
[0072] The following text sets forth a broad description of
numerous different embodiments of the present invention. The
description is to be construed as exemplary only and does not
describe every possible embodiment since describing every possible
embodiment would be impractical, if not impossible, and it will be
understood that any feature, characteristic, component,
composition, ingredient, product, step or methodology described
herein can be combined with or substituted for, in whole or part,
any other feature, characteristic, component, composition,
ingredient product, step or methodology described herein. Numerous
alternative embodiments could be implemented, using either current
technology or technology developed after the filing date of this
patent, which would still fall within the scope of the claims.
* * * * *