U.S. patent application number 14/511227 was filed with the patent office on 2015-01-22 for oral care instrument.
The applicant listed for this patent is Braun GmbH. Invention is credited to Niclas Altmann, Uwe Jungnickel.
Application Number | 20150020334 14/511227 |
Document ID | / |
Family ID | 45689049 |
Filed Date | 2015-01-22 |
United States Patent
Application |
20150020334 |
Kind Code |
A1 |
Jungnickel; Uwe ; et
al. |
January 22, 2015 |
Oral Care Instrument
Abstract
An oral hygiene implement is described herein. The oral hygiene
implement has a handle; a head, and a neck disposed between the
handle and the head. The head has a plurality of contact elements.
A sealing element is positioned between the handle and the neck.
The sealing element is translucent. An indication element is
positioned between the adjacent the sealing element. A light
emitting source provides electromagnetic energy to the indication
element, and the electromagnetic energy passes through the sealing
element.
Inventors: |
Jungnickel; Uwe;
(Koenigstein/Taunus, DE) ; Altmann; Niclas;
(Schneck, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Braun GmbH |
Kronberg |
|
DE |
|
|
Family ID: |
45689049 |
Appl. No.: |
14/511227 |
Filed: |
October 10, 2014 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
13366578 |
Feb 6, 2012 |
8904590 |
|
|
14511227 |
|
|
|
|
61440929 |
Feb 9, 2011 |
|
|
|
61482888 |
May 5, 2011 |
|
|
|
Current U.S.
Class: |
15/167.1 |
Current CPC
Class: |
A46B 15/0002 20130101;
A46B 15/0012 20130101; A46B 9/04 20130101; A46B 15/0044 20130101;
A46B 2200/1066 20130101 |
Class at
Publication: |
15/167.1 |
International
Class: |
A46B 15/00 20060101
A46B015/00; A46B 9/04 20060101 A46B009/04 |
Claims
1. An oral hygiene implement comprising a handle, a head, and a
neck disposed between the handle and the head, the head comprising
a plurality of contact elements, the oral hygiene implement further
comprising: an indication element disposed between the handle and
the neck wherein the indication element at least partially
surrounds the handle having an outer periphery wherein the
indication element provides a signal to a user indicating one or
more conditions wherein the signal is a light; an output source in
signal communication with the indication element wherein the output
source emits a light; and a reflective core disposed within the
indication element, wherein the reflective core redirects light
from the output source to the outer periphery of the indication
element and wherein the reflective core comprises a polished area
having a face wherein the light emitted by the indication element
is greater than about 20 percent of the light provided by the
output source.
2. The oral hygiene implement of claim 1, wherein the handle
comprises an outer shell with an insert having a base portion
disposed therein.
3. The oral hygiene implement of claim 2, wherein the insert
further comprises a forward portion, the forward portion comprising
a transmission element in signal communication with the reflective
core.
4. The oral hygiene implement of claim 2, wherein the indication
element is sandwiched between a first portion and a second portion
of a sealing element.
5. The oral hygiene implement of claim 4, wherein the first portion
and/or the second portion comprise a thermoplastic elastomer.
6. The oral hygiene implement of claim 4, wherein the first portion
and/or the second portion are translucent.
7. The oral hygiene implement of claim 6, wherein the first portion
and/or the second portion comprise a first color.
8. The oral hygiene implement of claim 7, wherein the output source
comprises a light emitting device capable of emitting a second
color, and wherein the first color and the second color are
different.
9. The oral hygiene implement of claim 8, wherein the light emitted
goes through the first portion and/or the second portion.
11. The oral hygiene implement of claim 7, wherein the output
source comprises a light emitting device capable of emitting a
second color, and wherein the first color and the second color are
similar.
12. The oral hygiene implement of claim 11, wherein the light
emitted goes through the first portion and/or the second
portion.
13. The oral hygiene implement of claim 4, wherein the first
portion and/or the second portion are transparent.
14. The oral hygiene implement of claim 1, wherein the reflective
core comprises a polished area having an outer surface.
15. The oral hygiene implement of claim 14, wherein the outer
periphery of the indication element comprises a first plurality of
sides and wherein the outer surface of the polished area has a
second plurality of sides.
16. The oral hygiene implement of claim 15, wherein the first
plurality of sides are substantially parallel to the second
plurality of sides.
17. The oral hygiene implement of claim 16, wherein the first
plurality of sides are at an angle with the second plurality of
sides.
18. The oral hygiene implement of claim 14, wherein the outer
surface of the polished area is at a uniform distance from the
outer periphery of the indication element.
19. The oral hygiene implement of claim 14, wherein the outer
surface of the polished area is variably space from the outer
periphery of the indication element.
20. An oral hygiene implement comprising a handle, a head, and a
neck disposed between the handle and the head, the head comprising
a plurality of contact elements, the oral hygiene implement further
comprising: an indication element having an outer periphery; an
output source in signal communication with the indication element;
and a reflective core disposed within the indication element,
wherein the reflective core redirects light from the output source
to the outer periphery of the indication element.
Description
FIELD OF THE INVENTION
[0001] The present invention pertains to a personal hygiene device,
more particularly to a personal hygiene device including a feedback
system.
BACKGROUND OF THE INVENTION
[0002] The utilization of toothbrushes to clean one's teeth has
long been known. There are two main classes of toothbrushes
available for a user, i.e. manual toothbrushes and power
toothbrushes. For manual toothbrushes the user generally provides
the majority of the cleaning motion. In contrast, for power
toothbrushes the majority of the cleaning motion is provided by the
toothbrush. The power toothbrush generally includes a drive
mechanism for driving a brush head. Because the toothbrush includes
a drive mechanism, power toothbrushes are generally more costly to
produce than manual toothbrushes. Power toothbrushes may provide a
user with additional features as well. For example, some power
toothbrushes can track the time that a brush head is used and
indicate to the user the time for replacement of the brush head. As
another example, some power toothbrushes can provide an indication
to the user as to when the user brushes a predetermined amount of
time.
[0003] Such features, e.g. replacement of a brush head, brush time
indication, are generally thought to be too cost prohibitive to
implement in manual toothbrushes. Accordingly, a need exists for a
personal hygiene implement which can provide the user with such
features while facilitating manufacturing in order to reduce
costs.
SUMMARY OF THE INVENTION
[0004] An oral hygiene implement constructed in accordance with the
present invention comprises a handle, a head, and a neck disposed
between the handle and the head. The head comprises a plurality of
contact elements. An indication element having an outer periphery.
An output source is in signal communication with the indication
element. A reflective core is disposed within the indication
element, and the reflective core redirects light from the output
source to the outer periphery of the indication element.
[0005] In some embodiments, an oral hygiene implement constructed
in accordance with the present invention comprises a handle; a
head, and a neck disposed between the handle and the head. The head
comprises a plurality of contact elements. A sealing element is
positioned between the handle and the neck. An indication element
is positioned adjacent the sealing element. A light emitting source
provides electromagnetic energy to the indication element, and
wherein the electromagnetic energy passes through the sealing
element.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 is a side view showing an oral hygiene implement,
e.g. a toothbrush, constructed in accordance with the present
invention.
[0007] FIG. 2 is a plan view showing a subsection of the toothbrush
of FIG. 1.
[0008] FIG. 3 is a cross sectional view of an outer shell of the
oral hygiene implement of FIG. 1.
[0009] FIG. 4A is a close up view showing a portion of the
subsection of FIG. 2.
[0010] FIG. 4B is a close up view showing another embodiment of a
portion of the subsection of FIG. 2A.
[0011] FIG. 5 is a plan view showing the subsection of FIG. 1.
[0012] FIG. 6 is close up view showing an indication element of the
oral hygiene implement of FIG. 1.
[0013] FIGS. 7A-7D are schematic representations showing
embodiments of reflective cores and an outer surfaces of indication
elements.
[0014] FIGS. 8A-8D are cross sectional views of exemplary LEDs
which are suitable for use with the oral hygiene implement of the
present invention.
DETAILED DESCRIPTION OF THE INVENTION
Definitions
[0015] 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 deleted, 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.
[0016] It should also be understood that, unless a term is
expressly defined in this patent using the sentence "As used
herein, the term `______` is hereby defined to mean . . . " or a
similar sentence, there is no intent to limit the meaning of that
term, either expressly or by implication, beyond its plain or
ordinary meaning, and such term should not be interpreted to be
limited in scope based on any statement made in any section of this
patent (other than the language of the claims). No term is intended
to be essential to the present invention unless so stated. To the
extent that any term recited in the claims at the end of this
patent is referred to in this patent in a manner consistent with a
single meaning, that is done for sake of clarity only so as to not
confuse the reader, and it is not intended that such claim term be
limited, by implication or otherwise, to that single meaning.
Finally, unless a claim element is defined by reciting the word
"means" and a function without the recital of any structure, it is
not intended that the scope of any claim element be interpreted
based on the application of 35 U.S.C. .sctn.112, sixth
paragraph.
[0017] As used herein, "oral hygiene implement" refers to any
device which can be utilized for the purposes of oral hygiene. Some
suitable examples of such devices include toothbrushes (both manual
and power), flossers (both manual and power), water picks, and the
like.
Description
[0018] For ease of explanation, the oral hygiene implement
described hereafter shall be a manual toothbrush; however, as
stated above, an oral hygiene implement constructed in accordance
with the present invention is not limited to a manual toothbrush
construction.
[0019] As shown in FIG. 1, a toothbrush 10 comprises a handle 12, a
head 14, and a neck 16 extending between the handle 12 and the head
14. A contact element field 20 extends from a first surface 14A of
the head 14. The handle 12 may comprise a distal end 80 and a
proximal end 90. A tongue cleaner, soft tissue cleanser, massaging
element, or the like, may be disposed on a second surface 14B of
the head 14. The tongue cleaners, soft tissue cleansers, massaging
elements, or the like, are discussed hereafter.
[0020] An indication element 30 may be disposed between the handle
12 and the neck 16 adjacent the proximal end 90. The indication
element 30 may provide a visible signal to a user for a plurality
of conditions. For example, the visible signal may be provided when
a user has brushed for an adequate amount of time, e.g. two minutes
and/or when the toothbrush needs to be replaced.
[0021] The indication element 30 may be placed in any suitable
location on the toothbrush 10. For example, in some embodiments,
the indication element 30 may surround the neck 16 or may surround
the handle 12. As another example, the indication element 30 may
surround a portion of the handle 12 and/or a portion of the neck
16. As yet another example, the indication element 30 may be
disposed on a back-facing surface 40B of the handle 12 and/or the
neck 16. As yet another example, the indication element 30 may be
disposed on a front-facing surface 40A of the handle 12 and/or the
neck 16.
[0022] Referring to FIGS. 1 and 2, in some embodiments, the handle
12 may comprise an outer shell 212. A variety of electronic
elements may be disposed within the outer shell 212. For example,
within the outer shell 212 there may be housed a power source 215,
216, a timing circuit, a processor 240, a band pass filter, and/or
output sources 245, e.g. audible sources, light sources, LED's,
combinations thereof, and/or the like. The outer shell 212 may
accommodate a plurality of power sources where additional voltage
is required, for example to provide threshold voltage for an
LED.
[0023] In order to facilitate manufacturing, the outer shell 212
may be provided via injection molding. Then an insert 260 may be
provided within the outer shell 212. The insert 260 can provide
support for the power sources 215, 216, the processor 240, and/or
the output source 245. The power sources 215, 216 can be in
electrical communication with the processor 240, and the processor
can be in electrical communication with the output source 245.
[0024] The insert 260 may comprise a base portion 260A and a
forward portion 260B. The base portion 260A may provide support as
described above and may comprise a PCB (printed circuit board). The
forward portion 260B may comprise a stem 275 which can engage a
recess in the neck 16 and/or the head 14. The engagement between
the stem 275 and the neck 16 and/or head 14 may be permanent such
that the neck 16 and/or head 14 are non-removable. In contrast, the
engagement between the stem 275 and the neck 16 and/or the head 14
may be configured such that the neck 16 and/or head 14 are
removable from the stem 275. In other embodiments, the forward
portion 260B may comprise the neck 16 and/or the head 14 integrally
formed with other parts of the forward portion 260B. In such
embodiments, the forward portion 260B may not include a stem
275.
[0025] The forward portion 260B may further comprise the indication
element 30, a sealing element 270 and a transmission element 231.
The output source 245, e.g. an LED, may be in signal communication
with the transmission element 231. The transmission element 231 can
transmit a signal from the output source 245 to the indication
element 30.
[0026] The sealing element 270 can engage an interior surface 375
(shown in FIG. 3) of the outer shell 212 thereby reducing the
likelihood of leakage into the cavity of the outer shell 212. The
sealing element 270 may comprise any suitable sealing feature. Some
examples of sealing features include deformable materials which can
be compressed and then recover within the cavity of the outer shell
212, o-rings, etc. In some embodiments, a soft material may be
overmolded onto the insert 260, and during assembly of the insert
260 and outer shell 212 the soft material may engage the outer
shell 212 to form a seal. In other embodiments, a soft material may
be overmolded to the outer shell 212, and subsequently the insert
260 may be inserted into the outer shell 212 and engage the soft
material. Still in other embodiments, a soft material may be a
discrete element which is either placed on the insert 260 before
attachment of the insert 260 to the outer shell 212 or is placed on
the outer shell 212 prior to the attachment of the insert 260 to
the outer shell 212.
[0027] The sealing element 270 may comprise a first portion 270A
and a second portion 270B. As shown, the first portion 270A may be
disposed adjacent the proximal end 90 of the handle. In an
assembled state, the first portion 270A can engage the interior
surface 375 (shown in FIG. 3) of the outer shell 212 and a surface
of the indication element 30 to reduce the likelihood of moisture
entering the outer shell 212. The second portion 270B may be
disposed adjacent the neck 16 or the stem 275. In an assembled
state, the second portion 270B can engage the neck 16 and the
indication element 30 to reduce the likelihood of moisture entering
the outer shell 212. Embodiments are contemplated where the sealing
element 270 comprise only the first portion 270A or the second
portion 270B.
[0028] In embodiments where the sealing element 270 includes both
the first portion 270A and the second portion 270B, the indication
element 30 may be disposed therebetween. In such embodiments, the
first portion 270A and/or the second portion 270B may be
translucent, transparent, pigmented, or combinations thereof.
Embodiments are contemplated where the sealing portion 270
comprises only the first portion 270A or the second portion 270B.
In such embodiments, the first portion 270A, the second portion
270B, or the sealing element 270 may be transparent, translucent,
pigmented, or combinations thereof.
[0029] Additionally, in such embodiments, light provided to the
indication element 30 may also be provided to the first portion
270A and/or second portion 270B. In the case where the first
portion 270A and/or 270B are transparent, the visible signal may be
provided to the user via the indication element 30 and the first
portion 270A and/or second portion 270B. In the case where the
first portion 270A and/or the second portion 270B are translucent,
the visible signal may comprise a tone contrast between the visual
signal of the first portion 270A and/or second portion 270B and the
indication element 30. In the case where the first portion 270A
and/or the second portion 270B are pigmented and translucent or
transparent, the light provided to the indication element 30 may
blend with the pigment color of the first portion 270A and/or the
second portion 270B to produce a unique visual effect. Accordingly,
the light provided may comprise a first color while the pigmented
first portion 270A and/or pigmented second portion 270B may
comprise a second color. When the light having a first color is
provided to the first portion 270A and/or the second portion 270B,
the first color and the second color may combine to yield a visible
signal which comprises a third color that is different than the
first color and the second color. In such embodiments, the overall
visible signal may then comprise the first color via the indication
element 30 and the third color via the first portion 270A and/or
the second portion 270B.
[0030] In some embodiments, the first portion 270A and/or second
portion 270B may comprise a first color. In such embodiments, an
output element, e.g. light emitting element, LED, may output a
light having a second color which is similar to the first color. In
such embodiments, it is believed that the visual signal provided by
the output emitting element may become more visually perceptible by
a user. Still in other embodiments, the first portion 270A may
comprise a first color and the second portion 270B may comprise a
second color which is different than the first color. In such
embodiments, the output element, e.g. a light emitting element,
LED, may output a light having a third color which is different
from the first and/or the second color. The combination of the
third color and the first color as well as the combination of the
third color and the second color may produce unique visual effects
which are perceptible by a user.
[0031] The forward portion 260B may be attached to the base portion
260A in any suitable manner. For example, the transmission element
231 may be provided with grooves which engage corresponding rails
on the base portion 260A or vice versa. In some embodiments, the
base portion 260A may be inserted into the outer shell 212 and
subsequently the forward portion 260B may be inserted into
engagement with the base portion 260A such that the sealing portion
270 engages the outer shell 212. In other embodiments, the base
portion 260A and the forward portion 260B may be assembled prior to
their insertion into the outer shell 212. This can facilitate any
wiring of the output source 245 which may be required.
Subsequently, the insert 260 (including the base portion 260A and
the forward portion 260B) may be inserted into the outer shell 212.
In other embodiments, the base portion 260A and the forward portion
260B may be integrally formed. However, in such embodiments,
additional electrical wiring steps may be required.
[0032] Referring to FIGS. 2 and 3, the outer shell 212 may comprise
supports 261A, 261B, 262A, and 262B. The supports 261A, 261B, 262A,
and 262B can fix the insert 260 in the outer shell 212. Either the
supports 261A, 261B, 262A, and 262B and/or the insert 260 may
comprise detents which engage/receive each other thereby fixing the
insert 260 within the outer shell 212. As shown the supports 261A,
261B, 262A, and 262B, can extend from an interior surface 375 of
the outer shell 212. As shown, the supports 261A, 261B, 262A, and
262B, may be configured to limit movement of the insert 260 along a
lateral axis 1501 and/or movement along a transverse axis 1500, or
combinations thereof.
[0033] During manufacturing, the outer shell 212 and/or the insert
260 may be produced via injection molding. An output source 245 as
well as power sources 215, 216 may be placed on the insert 260. The
insert 260 can be attached via the supports 261A, 261B, 262A, and
262B. As an example, the insert 260 may slidingly engage the
supports 261A, 261B, 262A, and 262B. The reduced number of parts
for this embodiment can reduce the time of manufacture of the oral
hygiene implement.
[0034] Referring to FIG. 2, the transmission element 231 may be
configured to transmit a signal from an output source 245 to the
indication element 30. For example, where the output source 245 is
an LED, the transmission element 231 may be a light pipe, light
guide, fiber optic, or the like. The material selected for the
transmission element 231 can be a clear material, transparent
material, translucent material, or combinations thereof which
transmit light from the LED through the transmission element 231 to
the indication element 30. Some examples of suitable materials for
the transmission element 231 include glass, polymethylmethacrylate,
polycarbonate, copolyester, polypropylene,
polyethyleneteraphthalate, combinations thereof, e.g. polyester and
polycarbonate, or the like,
[0035] In some embodiments, the indication element 30 and the
transmission element 231 may be unitary. For example, the
transmission element 231 and the indication element 30 may be
integrally constructed out of a first material during an injection
molding process. In some embodiments, transmission element 231 may
be a discrete part which is later connected to the indication
element 30. In some embodiments, the indication element 30, the
transmission element 231, stem 275, and/or base portion 260A may be
integrally formed. In some embodiments, the indication element 30,
transmission element 231, and/or stem 275, may be integrally formed
and subsequently attached to the base portion 260A. The benefit of
such embodiments is that a reduced number of components are
required for the brush which can reduce the cost and/or time of
assembly.
[0036] The transmission element 231 may transmit electromagnetic
energy, e.g. visible light, to the indication element 30 via
internal reflection or external reflection. External reflections
are reflections where the light originates in a material of low
refractive index (such as air) and reflects off of a material with
a higher refractive index (such as aluminum or silver). A common
household mirror operates on external reflection.
[0037] Internal reflections are reflections where the light
originates in a material of higher refractive index (such as
polycarbonate) and reflects off of a material with lower refractive
index (such as air or vacuum or water). Fiber optic technology
operates on the principle of internal reflections.
[0038] Refractive index is an optic attribute of any material which
measures the tendency of light to refract, or bend, when passing
through the material. Even materials that do not conduct light
(such as aluminum) have indices of refraction.
[0039] Typically, external reflections are most efficient when the
angle of incidence of the light is near-normal (i.e., light
approaches perpendicular to the surface) and degrade as the angle
of incidence increases (approaches the surface at a steep angle).
Conversely, internal reflections are most efficient at high angles
of incidence and fail to reflect at shallow angles, e.g. normal to
the surface. In order to achieve internal reflection, the angle of
incidence should be greater than the critical angle. The critical
angle is the angle below which light no longer reflects between a
pair of materials.
[0040] Referring back to FIGS. 2 and 3, for those embodiments of
the present invention that utilize external reflection, a foil or
some other highly reflective material can be utilized within the
outer shell 212. The highly reflective material, e.g. foil, can be
disposed on the interior surface 375. In other embodiments, the
highly reflective material, e.g. foil can be wrapped around the
transmission element 231. One downside to such embodiments is that
additional manufacturing steps may be required in order to provide
the highly reflective material to the appropriate location(s).
[0041] For those embodiments utilizing internal reflection, a
material may be selected having high refractive index, e.g. above
1.0. For example, the material selected for the transmission
element 231 may comprise a refractive index of greater than about
1.4, greater than about 1.5, greater than about 1.6, and/or less
than about 1.7, less than about 1.6, less than about 1.5, any
number within the values provided or any ranges within the values
provided. In some embodiments, the material selected for the
transmission element 231 has a refractive index of between about
1.4 to about 1.6.
[0042] Referring to FIGS. 4A through 4B, in such embodiments, an
outer surface 429, 1429, of the transmission element 231, 431, may
be polished. The polished outer surface 429, 1429 of the
transmission element 231, 431, can reduce the amount of leakage of
light from the transmission element 231, 431.
[0043] In some embodiments, the transmission element 231 may
comprise a receptacle 453 for receiving the output source 450, e.g.
LED. The receptacle 453 may be disposed on an end 455 of the
transmission element 231. One benefit of implementing the
receptacle 453 on the end 455 of the transmission element 231 is
that during manufacturing, the output source 245 (shown in
[0044] FIG. 2), e.g. LED, may be inserted into the receptacle 453
thereby reducing the chance for misalignment of the output source
245 with respect to the transmission element 231. This can help
reduce the amount of leakage of light between the output source 245
and the transmission element 231.
[0045] As stated previously, to achieve internal reflection,
impinging light should be above the critical angle. The angle at
which light impinges upon the transmission element 231 can be
impacted by the distribution angle (discussed hereafter) of the
output source 245 or 1450 (shown in FIG. 4B). For those output
sources having a small distribution angle, the design of the
receptacle 453, e.g. sides 453A and 453B perpendicular to face
453C, may be sufficient to capture the majority of light emitted
from the output source 245 for internal reflection. However, any
light which is not above the critical angle will generally not be
internally reflected. Accordingly, the sides 453A, 453B and/or the
face 453C may be configured to increase the amount of light which
is above the critical angle. For example, the sides 453A and/or
453B may be tapered toward or away from the face 453C. Similarly,
the face 453C may include an angled surface, multiple angled
surfaces, curved surfaces, e.g. lens shaped, to increase the amount
of emitted light which is above the critical angle.
[0046] Referring to FIG. 4B, in some embodiments, a transmission
element 431 may be configured with a flat surface on an end 1455 as
shown in FIG. 4B. In such embodiments, an output source 2450, e.g.
LED, may be positioned a distance 1460 away from the end 1455. In
an effort to reduce the amount of light leaked from the output
source 2450, distance B (1460) should generally be within the
following guidelines.
B .ltoreq. A tan ( .alpha. ) ##EQU00001##
[0047] Where a is the half angle a available from a manufacturer's
specifications for an output source of light, and where A (1457) is
a leg of projection on the transmission element 431. The leg of
projection 1457 is the straight line distance from the midpoint of
the output source 2450 projected onto the transmission element 431
to an edge 1459 of the transmission element 431.
[0048] For those embodiments utilizing internal reflection, the
distribution angle of the output source 450, 1450, e.g. LED, should
be considered. If the distribution angle is too broad, a portion of
the light provided to the transmission element 231, 431 may not be
internally reflected and instead will be leaked out of the
transmission element 231, 431. Any suitable distribution angle may
be utilized. Some examples of suitable distribution angles include
greater than about 0 degrees, greater than about 1 degrees, greater
than about 2 degrees, greater than about 5 degrees, greater than
about 6 degrees, greater than about 8 degrees, greater than about
10 degrees, greater than about 12 degrees, greater than about 14
degrees, greater than about 16 degrees, greater than about 18
degrees, greater than about 20 degrees, greater than about 22
degrees, and/or less than about 22 degrees, less than about 20
degrees, less than about 18 degrees, less than about 16 degrees,
less than about 14 degrees, less than about 12 degrees, less than
about 10 degrees, less than about 8 degrees, or any number within
the values provided or any ranges within the values provided.
[0049] Additionally, embodiments comprising multiple output sources
are contemplated. For example, a receptacle may be configured such
that two LEDs may be positioned therein. A first LED may provide a
first output signal for one condition, e.g. brushing time, while a
second LED may provide a second output signal for a second
condition, e.g. time for brush replacement, wherein the first
output signal and the second output signal are different.
Similarly, in embodiments where the transmission element does not
include a receptacle, a plurality of output sources, e.g. LEDs, may
be utilized.
[0050] Instead of a plurality of LEDs, embodiments are also
contemplated where the output source comprises an LED having
multiple dices as described in U.S. Patent Application Publication
No. 2005/0053896A1. As shown in FIG. 8A, an LED 815 may include a
lens 830, and one positive lead 821 and one negative lead 809. The
LED 815 may comprise more than one light emitter and more than one
semi-conductor substrate, and can have more than two leads.
Embodiments are contemplated where the LED comprises two dices.
Additionally, embodiments are contemplated where the LED comprises
more than two dices.
[0051] For example, the LED 815 may comprise multiple light
emitting dices 805 and 817 and a wire bonding 807 and 818. The wire
bonding 818 may serve as the connection between the dices 805 and
817. This connection can be either a parallel connection or a
serial connection.
[0052] As shown in FIG. 8B, an LED 815B (two wire LED) may comprise
multiple dices 805 and 817 connected in series. The LED 815B may
include one positive lead 809 and one negative lead 827. As shown,
each dice 805 and 817 may have an individual pedestal 837 and 839.
The dices have a serial connection 811 connecting the top of dices
805 to the bottom of dices 817, and wire bonding 813 connects the
top of dices 817 to the negative lead 827. All light from the light
emitting sources may be combined to result in a single light output
at lens 830 of LED 815B.
[0053] As shown in FIG. 8C, an LED 815C may include multiple dices
805 and 817 connected in parallel. The LED 815C may comprise a
single light output, the lens 830, and one positive lead 809, and
one negative lead 827. The dices may have a parallel connection,
wire bonding 837 connecting the top of dices 805 to the top of
dices 817, and wire bonding 807 connecting the top of dices 817 to
the top of the common negative lead 827. All light from the light
emitting sources can be combined to result in a single light output
at lens 830 of LED 815C.
[0054] As shown in FIG. 8D, an LED 815D (three wire LED) may
include multiple dices 805 and 817. The LED 815D may comprise a
lens 830, two semiconductor substrates, dices 805 and 817 shown
connected in parallel, wire bondings 819 and 821, one positive lead
833, and two negative leads 831 and 835. This LED 815D also emits
light from a single light output, the lens 830. Each dice may have
an individual pedestal 837 and 839. It is also contemplated that
the LED 815D can comprise two positive leads, and one negative
lead; and the dices 805 and 817 can be connected in series.
[0055] Additionally, the LED can comprise more than two
semi-conductor substrates having light emitting properties, and the
LED can comprise more than two leads. The LED can have a common or
shared lead, or can have individual leads for each semi-conductor
substrate having light emitting properties. Further, each
semi-conductor substrate having light emitting properties can be
individually powered by a separate power source, such as a
battery.
[0056] One advantage of a three wire LED, e.g. LED 815D, is that
the dices 805 and 817 may be independently operated. For example,
where the LED 815D comprises two positive leads, the dices may be
independently controlled. So, the first dice 805 may be operated at
eighty percent capacity while the second dice 807 is operated at
twenty percent capacity. As another example, the first dice 805 may
be operated at fifty percent while the second dice 817 is operated
at 100 percent. There are countless combinations for operating
levels of the first dice 805 and the second dice 817. It is
believed that such combinations can achieve color blends which
create a unique visual effect for the user.
[0057] For two wire LEDs light blends are also possible. For
example, the polarity of the supply voltage can be switched at a
high enough rate, e.g. higher than 70 Hz, such that the dices can
be driven and create a blended color effect. When the polarity of
the supply voltage is in a first state, a first dice may be
energized. When the polarity of the supply voltage is in a second
state, a second dice may be energized. If the polarity of the
supply voltage is switched fast enough, a user may perceive a color
blend. The switching rate of the polarity of the supply voltage may
be 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, greater than about 130 Hz, 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, or any number within the
values provided or any ranges within the values provided.
[0058] As stated above, these dices can be electrically connected
in parallel or in series. When they are connected in series, all
current considerations are the same as for one single dice. The
total voltage can be approximated by the equation below:
V=V.sub.f1+V.sub.f2+ . . . +V.sub.fn
where n is equal to the number of dices and V.sub.f=forward voltage
for a particular dice. If the dices are connected in parallel, the
total voltage is approximately that of a single dice.
[0059] Serial connection works well because it adjusts for
differences between the dices. When the dices are connected in
series, they automatically adjust their forward voltages and their
luminous intensity become very close. In either arrangement the two
dices have approximately the luminous intensity of
1.6.times.P.sub.i, where P.sub.i is luminous intensity of a single
dice. A three dices LED will likely have the luminous intensity of
about 2.26.times.P.sub.i. (Interference between the dices can
prevent the luminous intensity calculation from being a multiplier
by the number of dice.) These dices can deliver the same color of
light, or they can have different colors of light. However, if each
individual light emitter emits the same light, the luminous
intensity of that color light from that one single LED is greater
than a single standard LED emitting light of one color.
[0060] A single LED could also contain two dices emitting different
colors of light, for example a wavelength selected from the range
of greater than about 370, 380, 390, 400, 425, 440, 450, 475, 480
and/or less than about 500 nanometers. The dices could also be
selected such that the dices emit light of a different wavelength
within the same color range; for example the dices could emit light
having different wavelengths that result in the color blue.
Further, the combination of the different wavelengths of light at
the single optical output of the LED (the lens) could result in a
specific combination of colors that delivers an oral care benefit.
Some colors are difficult to achieve by a single wavelength of
light; this invention can be used to produce light of one of these
unique colors. Thus the combination of different colors at the
single optical output may result in a color that cannot be achieved
by one dice alone.
[0061] For those embodiments comprising multiple LEDs or an LED
with multiple dices, the oral hygiene implement of the present
invention may provide the user with multiple signals. For example,
a first dice may be energized providing the user with a first
visual indication. The first visual indication may correlate to a
predetermined amount of time brushed by the user, for example. A
second dice may be energized providing the user with a second
visual indication. The second visual indication may signal the user
that it is time to replace the oral care device. In such
embodiments, the first visual indication may comprise first color
while the second visual indication comprises a second color which
is different than the first color. Any suitable colors may be
utilized.
[0062] Referring to FIG. 5, as stated previously, the transmission
element 231, 431, can transmit a signal, e.g. electromagnetic
energy, from the output source 245, 2450, to the indication element
30. In an effort to reduce the amount of energy leaked through the
stem 275, a reflective core 461 (shown in FIG. 6) may be utilized.
For those embodiments where forward portion 260B comprise the neck
16 and/or head 14, a reflective core may be utilized in the neck 16
and/or head 14.
[0063] Referring to FIG. 6, as shown, a reflective core 461 may be
disposed in the indication element 30 and extend to the stem 275.
The reflective core 461 can reduce the amount of light which is
lost through the stem 275 and into the neck and/or head of the
brush. Additionally, the reflective core 461 can assist in
distributing light through the indication element 30 to a periphery
430 of the indication element 30. Also, in some embodiments, the
reflective core 461 may be configured to assist in providing light
to the first portion 270A and/or second portion 270B.
[0064] The reflective core 461 may comprise a polished area 467
having a face 468. The polished area 467 of the reflective core 461
is that portion of the reflective core 461 disposed within the
indication element 30. The remainder of the reflective core 461 may
be polished but it does not need to be. The polished area 467 can
be configured to redirect light transmitted through the
transmission element to the indication element 30, the first
portion 270A and/or the second portion 270B.
[0065] Where the indication element 30 is a ring, the polished area
467 may be configured in the form of a cone (See FIG. 7A). As shown
in FIG. 7B, where the indication element 30 comprises a ring, a
polished area 467B may comprise multiple sides 767A-767D. As shown
in FIG. 7C, an indication element 30C may comprise multiple sides
730A, 730B, 730C, 730D. And, a polished area 467C may similarly
comprise multiple sides 767A-767D. As shown, the sides of the
polished area 467C may be positioned at an angle with respect to
the sides of the indication element 30C. As shown in FIG. 7D, an
indication element 30D may comprise multiple sides 730A-730D. And,
a polished area 467D may comprise multiple sides 767A-767D. The
sides of the polished area 467D may be substantially parallel to
the sides of the indication element 30D. It is believed that such
arrangements may produce a different visual effect than that of a
polished area 467 which is conical.
[0066] Referring back to FIG. 6, the reflective core 461 as shown
can be a recess which remains empty in the final product. In some
embodiments, the reflective core 461 may be partially filled with a
material. Where the reflective core 461 is partially filled, an air
gap between the filling material and the polished area 467 may be
provided. The existence of this air gap can ensure that internal
reflection is maintained within the indication element 30. In some
embodiments, the reflective core 461 may be completely filled with
material which has a lower refractive index than that of the
material of the reflective core.
[0067] It is believed that without the reflective core 461 less
than about 10 percent of the light provided by the output source
would be emitted by the indication element 30. And, it is believed
that with the reflective core 461 about 90 percent or more of the
light provided by the output source would be emitted by the
indication element 30, the first portion 270A and/or the second
portion 270B. In some embodiments, the light emitted by the
indication element 30 is greater than about 10 percent of the light
provided by the output source, greater than about 20 percent,
greater than about 30 percent, greater than about 40 percent,
greater than about 50 percent, greater than about 60 percent,
greater than about 70 percent, greater than about 80 percent,
greater than about 90 percent, less than about 100 percent, less
than about 90 percent, less than about 80 percent, less than about
70 percent, less than about 60 percent, less than about 50 percent,
less than about 40 percent, less than about 30 percent, less than
about 20 percent, or any number within the values listed above or
any ranges comprising and/or within the values above. A test method
for measuring the light emission efficiency is discussed
hereafter.
[0068] Toothbrushes constructed in accordance with the present
invention may provide feedback to the user via the indication
element for a variety of conditions. For example, during a brushing
session, a visible signal may be provided when the user has brushed
their teeth for a predetermined amount of time, e.g. two minutes,
three minutes, etc. As another example, a visible signal may be
provided to the user regarding when the brush should be replaced.
As yet another example, a visible signal may be provided to the
user regarding the time the user has brushed over a number of
brushing routines. In such embodiments, a first signal may be
provided where the user has successfully brushed for a requisite
period of time, e.g. two minutes, for a predetermined number of
brushing routines. A second signal may be provided to the user
where the user has not brushes the requisite time for each and
every of the predetermined number of brushing routines.
[0069] The signal provided to the user may be constant, e.g.
provide a signal to the user during the entire brushing routine.
Alternatively, the signal provided to the user can be provided at
the end of the brushing routine. For example, where the user has
not brushed for the predetermined amount of time, e.g. two minutes,
in a previous brushing routine, the signal provided to the user may
flash red or show a red visible signal for a predetermined time
period during a subsequent brushing routine. As another example,
where the user brushed for a predetermined amount of time during a
previous brushing routine, the signal provided to the user may
flash green or show a green visible signal for a predetermined
period of time.
[0070] In other embodiments, the signal can be provided to the user
intermittently during the brushing routine. For example, the signal
can be provided to the user on predetermined time intervals. For
example, a signal may be provided to the user every 20 seconds. Any
suitable time interval can be selected. For example, the time
interval between signals can be greater than about 0.1 second,
greater than about 0.2 seconds, greater than about 0.3 seconds,
greater than about 0.4 seconds, greater than about 0.5 seconds,
greater than about 0.6 seconds, greater than about 0.7 seconds,
greater than about 0.8 seconds, greater than about 0.9 seconds,
greater than about 1 second, greater than about 2 seconds, greater
than about 3 seconds, greater than about 4 seconds, greater than
about 5 seconds, greater than about 6 seconds, greater than about
10 seconds, greater than about 15 seconds, greater than about 20
seconds, greater than about 25 seconds, greater than about 30
seconds, greater than about 40 seconds, greater than about 50
seconds, greater than about 60 seconds, and/or less than about 60
seconds, less than about 50 seconds, less than about 40 seconds,
less than about 30 seconds, less than about 25 seconds, less than
about 20 seconds, less than about 15 seconds, less than about 10
seconds, less than about 5 seconds, less than about 4 seconds, less
than about 3 seconds, less than about 2 seconds, less than about
1.5 seconds, less than about 1, less than about 0.9 seconds, less
than about 0.8 seconds, less than about 0.7 seconds, less than
about 0.6 seconds, less than about 0.5 seconds, less than about 0.4
seconds, less than about 0.2 seconds, or less than about 0.1
seconds.
[0071] Previously, a time interval between signals was discussed.
In some embodiments, a processor may be configured to modify the
time interval between the signals provided to the user either
during a particular brushing routine or over a series of brushing
routines. For example, during a first brushing routine, if the user
brushes for a predetermined amount of time, e.g. two minutes, the
interval between signals to the user may be at a first time
interval. If in a second brushing routine, the user does not brush
for the predetermined amount of time, the signals to the user may
be at a second time interval. In such an embodiment, the first time
interval may be greater than the second time interval thereby
providing more feedback to the user. In some embodiments, the time
intervals may be switched such that the user is provided more
feedback for brushing the predetermined amount of time.
[0072] The materials suitable for the insert 260 should be selected
such that the insert can withstand forces, e.g. no permanent
deformation, minimal deflection if any of the forward portion and
or base portion applied during brushing. Additionally, suitable
materials may be non-corrosive, stiff, transparent, and/or
translucent. Some suitable examples of materials which may be
utilized for the insert 260 include polypropylene, acrylonitrile
butadiene styrene, polyoxymethylene, polyamide, acrylonitrile
styrene acrylate, and polyethyleneterephthalate (PET), copolyester,
combinations thereof, combinations of polyester and polycarbonate,
e.g. Xylex.TM..
[0073] The outer shell 212 may be any suitable material. Some
examples of suitable materials include polypropylene, ABS
(acrylonitrile-butadiene-styrene copolymer), ASA
(acrylonitrile-styrene-acrylate), copolyester, POM
(polyaformaldeyde), combinations thereof, and the like. Additional
suitable materials include polypropylene, nylon, high density
polyethylene, other moldable stable polymers, the like, and/or
combinations thereof. In some embodiments, the handle, the neck,
and/or the head, may be formed from a first material and include
recesses, channels, grooves, for receiving a second material which
is different from the first. For example, the handle may include an
elastomeric grip feature or a plurality of elastomeric grip
features. The elastomers among the plurality of elastomeric grip
features may be similar materials or may be different materials,
e.g. color, hardness, combinations thereof or the like.
[0074] The sealing element 270 may comprise any suitable material.
Some examples of suitable material include thermoplastic
elastomers, silicone based materials, NBR (nitrile butadiene
rubber), EPDM (ethylene propylene diene monomer), Viton.TM.,
etc.
[0075] In some embodiments, recycled and/or plant derived plastics
may be utilized. For example, PET (polyethyelene terephthalate) may
be utilized in some embodiments. The PET may be bio based. For
example, the PET may comprise from about 25 to about 75 weight
percent of a terephthalate component and from about 20 to about 50
weight percent of a diol component, wherein at least about one
weight percent of at least one of the terephthalate and/or the diol
component is derived from at least one bio-based material.
Similarly, the terephthalate component may be derived from a bio
based material. Some examples of suitable bio based materials
include but are not limited to corn, sugarcane, beet, potato,
starch, citrus fruit, woody plant, cellulosic lignin, plant oil,
natural fiber, oily wood feedstock, and a combination thereof.
[0076] Some of the specific components of the PET may be bio based.
For example, monoethylene glycol and terephthalic acid may be
formed from bio based materials. The formation of bio based PET and
its manufacture are described in United States Patent Application
Publication Nos. 20090246430A1 and 20100028512A1.
[0077] In some embodiments, the toothbrush may include a
replaceable head, e.g. 14 and/or neck 16. Specifically, the head 14
may be removable from the neck 16 and/or the neck 16 may be
removable from the handle 12. Herein, whether the head 14 is
removable from the neck 16 or the neck 16 is removable from the
handle 12, such replaceable elements will be termed "refills". In
such embodiments, the processor may be programmed with a plurality
of algorithms in order to establish a time period for cumulative
use of a particular refill and/or for identification of a
particular use. Some suitable examples of oral care implements
which can recognize a particular refill are described in U.S. Pat.
Nos. 7,086,111; 7,207,080; and 7,024,717.
[0078] The interconnectivity between the neck 16 and the handle
region 12 can be provided in any suitable manner. Some suitable
embodiments are discussed with regard to U.S. Pat. Nos. 7,086,111,
7,207,080, and 7,024,717.
[0079] The toothbrush of the present invention may further comprise
a power source as discussed previously. The power source may be any
suitable element which can provide power to the toothbrush. A
suitable example includes batteries. The battery may be sized in
order to minimize the amount of real estate required inside the
toothbrush. For example, where the output source consists of a
light emitting element the power source may be sized relatively
small, e.g. smaller than a triple A battery. The battery may be
rechargeable or may be disposable. Additionally, a plurality of
batteries may be utilized. In some embodiments, the power source
may include alternating current power as provided by a utility
company to a residence. Other suitable power sources are described
in U.S. patent application Ser. No. 12/102881, filed on Apr. 15,
2008, and entitled, "Personal Care Products and Methods".
[0080] In some embodiments, a user operated switch may be provided
which can allow the user to control when timing indication begins.
The switch (shown may be in electrical communication with the power
source and the output signal element and/or the timer.
[0081] The elastomeric grip features of the handle may be utilized
to overmold, at least in part, a portion of the timer, output
signaling element, processor, cap, and/or power source. In such
embodiments, these components may be in electrical communication
via wiring which can similarly be overmolded. The elastomeric grip
features may include portions which are positioned for gripping by
the palm of the user and/or portions which are positioned for
gripping by the thumb and index finger of the user. These
elastomeric grip features may be composed of the same material or
may be different, e.g. color, shape, composition, hardness, the
like, and/or combinations thereof.
[0082] Additionally, as used herein, the term "contact elements" is
used to refer to any suitable element which can be inserted into
the oral cavity. Some suitable elements include bristle tufts,
elastomeric massage elements, elastomeric cleaning elements,
massage elements, tongue cleaners, soft tissue cleaners, hard
surface cleaners, combinations thereof, and the like. The head may
comprise a variety of contact elements. For example, the head may
comprise bristles, abrasive elastomeric elements, elastomeric
elements in a particular orientation or arrangement, e.g. pivoting
fins, prophy cups, or the like. Some suitable examples of
elastomeric cleaning elements and/or massaging elements are
described in U.S. Patent Application Publication Nos. 2007/0251040;
2004/0154112; 2006/0272112; and in U.S. Pat. Nos. 6,553,604;
6,151,745. The cleaning elements may be tapered, notched, crimped,
dimpled, or the like. Some suitable examples of these cleaning
elements and/or massaging elements are described in U.S. Pat. Nos.
6,151,745; 6,058,541; 5,268,005; 5,313,909; 4,802,255; 6,018,840;
5,836,769; 5,722,106; 6,475,553; and U.S. Patent Application
Publication No. 2006/0080794.
[0083] The contact elements may be attached to the head in any
suitable manner. Conventional methods include stapling, anchor free
tufting, and injection mold tufting. For those contact elements
that comprise an elastomer, these elements may be formed integral
with one another, e.g. having an integral base portion and
extending outward therefrom.
[0084] The head may comprise a soft tissue cleanser constructed of
any suitable material. Some examples of suitable material include
elastomeric materials; polypropylene, polyethylene, etc; the like,
and/or combinations thereof. The soft tissue cleanser may comprise
any suitable soft tissue cleansing elements. Some examples of such
elements as well as configurations of soft tissues cleansers on a
toothbrush are described in U.S. Patent Application Nos.
2006/0010628; 2005/0166344; 2005/0210612; 2006/0195995;
2008/0189888; 2006/0052806; 2004/0255416; 2005/0000049;
2005/0038461; 2004/0134007; 2006/0026784; 20070049956;
2008/0244849; 2005/0000043; 2007/140959; and U.S. Pat. Nos.
5,980,542; 6,402,768; and 6,102,923.
[0085] For those embodiments which include an elastomeric element
on a first side of the head and an elastomeric element on a second
side of the head (opposite the first), the elastomeric elements may
be integrally formed via channels or gaps which extend through the
material of the head. These channels or gaps can allow elastomeric
material to flow through the head during an injection molding
process such that both the elastomeric elements of the first side
and the second side may be formed in one injection molding
step.
Test Method for Determining Light Emission Efficiency
[0086] Obtain three samples of the brush to be tested and three
samples of the output source utilized in the brush. The samples of
the output source should be identical to that utilized in the
brush. Take all samples, i.e. three brush samples and three samples
of the output source, to an independent testing facility. The
testing facility will test each of the three samples of the brush
and each of the samples of the output source in an appropriately
sized integrating sphere. For example, a 12 inch integrating sphere
may be suitable to fit the brush samples.
[0087] The testing facility will calibrate all equipment prior to
measurement of any samples. The samples of the output source will
be tested prior to the testing of the brushes. The testing facility
will place one sample of the output source in the integrating
sphere in accordance with standard testing procedures. The output
source will be powered by the same voltage as that provided in the
brush. Specifically, if the brush utilizes two 1.5 volt watch
batteries, then the output source shall similarly be powered by two
1.5 volt watch batteries.
[0088] The output source shall be powered on, the integrating
sphere closed, and the total light radiated from the output source
shall be measured. Each of the remaining samples of output source
shall be measured similarly. The total light output of each of the
samples of output source will be recorded and noted by each
sample.
[0089] Remove the sample output source from the integrating sphere
prior to testing a sample brush. Place a sample brush in the
integrating sphere configured in such a manner as to activate the
output source of the brush without blocking the light emitted from
the indication element of the brush. For example, where the
indication element provides a visual indication of too much
pressure being applied, a harness may be utilized to move the
head/neck of the brush to ensure that the indication element/output
source is activated. Measure the total light radiated from the
sample brush. Repeat for the remaining samples of brush.
[0090] The total light radiated from sample output source one will
be divided by the total light radiated from sample brush one. The
quotient is then multiplied by 100 to determine percent one. The
total light radiated from sample output source two will be divided
by the total light radiated from sample brush two. The quotient is
then multiplied by 100 to determine percentage two. The total light
radiated from sample output source three will be divided by the
total light radiated from sample brush three. The quotient is then
multiplied by 100 to determined percentage three. The percentages
one, two, and three, are averaged to obtain the percent
efficiency.
[0091] 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."
[0092] Every document cited herein, including any cross referenced
or related patent or application, is hereby incorporated herein by
reference in its entirety unless expressly excluded or otherwise
limited. The citation of any document is not an admission that it
is prior art with respect to any invention disclosed or claimed
herein or that it alone, or in any combination with any other
reference or references, teaches, suggests or discloses any such
invention. Further, to the extent that any meaning or definition of
a term in this document conflicts with any meaning or definition of
the same term in a document incorporated by reference, the meaning
or definition assigned to that term in this document shall
govern.
[0093] 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.
* * * * *