U.S. patent application number 16/764145 was filed with the patent office on 2020-12-24 for functional toothbrush stick and method for manufacturing same.
The applicant listed for this patent is Mi Ra PARK. Invention is credited to Mi Ra PARK.
Application Number | 20200397133 16/764145 |
Document ID | / |
Family ID | 1000005072844 |
Filed Date | 2020-12-24 |
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United States Patent
Application |
20200397133 |
Kind Code |
A1 |
PARK; Mi Ra |
December 24, 2020 |
FUNCTIONAL TOOTHBRUSH STICK AND METHOD FOR MANUFACTURING SAME
Abstract
A functional toothbrush shaft and a method of manufacturing the
same are proposed. The functional toothbrush shaft includes: a
toothbrush body including a handle, a bristle head support neck,
and a bristle head; and at least one finger support protrusion that
forms a stable resultant force by forming at least three support
points on the handle of the toothbrush body, prevents slipping of a
user's fingers to increase friction, and allows free gripping
throughout 360.degree. at any point of a cylindrical surface of the
toothbrush body.
Inventors: |
PARK; Mi Ra; (Seoul,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PARK; Mi Ra |
Seoul |
|
KR |
|
|
Family ID: |
1000005072844 |
Appl. No.: |
16/764145 |
Filed: |
November 12, 2018 |
PCT Filed: |
November 12, 2018 |
PCT NO: |
PCT/KR2018/013703 |
371 Date: |
July 21, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A46B 5/026 20130101;
A46B 5/021 20130101; A46B 9/028 20130101; A46B 9/04 20130101; A46B
15/0069 20130101; A46B 2200/108 20130101 |
International
Class: |
A46B 9/04 20060101
A46B009/04; A46B 5/02 20060101 A46B005/02 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 15, 2017 |
KR |
10-2017-0152489 |
Claims
1. A functional toothbrush shaft, comprising: a toothbrush body
including a handle, a bristle head support neck, and a bristle
head; and at least one finger support protrusion that forms a
stable resultant force by forming at least three support points on
the handle of the toothbrush body, prevents slipping of a user's
fingers to increase friction, and allows free gripping throughout
360.degree. at any point of a cylindrical surface of the toothbrush
body.
2. The functional toothbrush shaft of claim 1, wherein the finger
support protrusion comprises: a first finger support protrusion
protruding from an outer circumferential surface of the handle, and
determining upper positions of a user's thumb and a user's index
finger; a second finger support protrusion protruding determining
lower positions of the user's thumb and the user's index finger;
and a third finger support protrusion determining a position of a
user's middle finger, wherein first and second support grooves
allowing the user's fingers to be seated therein are provided
between the first, second, and third finger support
protrusions.
3. The functional toothbrush shaft of claim 1, further comprising:
a rear round grip provided at a rear end of the handle, and
allowing a user's ring finger, and a user's little finger, and a
user's palm to be placed and supported thereon.
4. The functional toothbrush shaft of claim 2, further comprising:
a shoulder grip provided between a front end of the first finger
support protrusion and the bristle head support neck, and allowing
the user's thumb and the user's index finger to be placed thereon
and prevented from slipping.
5. The functional toothbrush shaft of claim 1, wherein a center of
gravity of the toothbrush body is placed at a rear end of the
handle so that even if a toothbrush is dropped on a floor, the
handle is first brought into contact with the floor; and the finger
support protrusions form a predetermined angle with respect to
bristles and the bristle head support neck is formed inclinedly so
that the bristles of the bristle head are prevented from contact
with the floor and thus prevented from contamination due to a
contact surface.
6. The functional toothbrush shaft of claim 1, wherein the handle
and the finger support protrusion protruding outward from the
handle are formed in a circular shape to facilitate rotation.
7. The functional toothbrush shaft of claim 1, wherein the
toothbrush body further comprises a month indicator on which each
month from January to December is marked as numbers or twelve
colors are displayed, so that the toothbrush shaft is replaced
every month and used in a state in which dental plaque removing
efficiency of bristles is high, thereby providing a psychological
and educational effect to increase oral hygiene awareness.
8. The functional toothbrush shaft of claim 1, wherein the bristle
head is one selected from a daily brush head, an advanced brush
head, an interdental brush head, and an infant brush head.
9. A method of manufacturing a functional toothbrush shaft of claim
1, the method being capable of maximizing personalized motion
suitability in accordance with an anatomical structure of a hand of
a user and further increasing personalized anatomical suitability
by three-dimensional (3D) scanning and printing in manufacturing
the functional toothbrush shaft, the method comprising: inputting
anatomical structure data of the hand of the user including a
person with disability, into a computer; generating toothbrush
shaft design data conforming to the anatomical structure of the
hand of the user including the person with disability;
transmitting, by the computer, three-dimensional (3D) data to a
three-dimensional (3D) printer; and producing, by the 3D printer, a
three-dimensional toothbrush shaft on the basis of on the 3D data,
thereby manufacturing a personalized toothbrush shaft.
10. The functional toothbrush shaft of claim 2, further comprising:
a rear round grip provided at a rear end of the handle, and
allowing a user's ring finger, and a user's little finger, and a
user's palm to be placed and supported thereon.
Description
TECHNICAL FIELD
[0001] The present invention relates generally to a functional
toothbrush shaft and a method of manufacturing the same. More
particularly, the present invention relates to a functional
toothbrush shaft and a method of manufacturing the same, wherein a
finger support protrusion forms at least three support points by a
finger support structure to form a stable resultant force; slipping
of a user's fingers is prevented to increase friction thereby
enabling stable gripping; and the toothbrush shaft is designed to
rotate 360.degree. to enable free gripping in any direction,
thereby ensuring that bristles reach any area in a user's oral
cavity stably to accurately and efficiently remove dental plaque
from all surfaces (tooth surfaces, mucosal surfaces, and the
tongue) in a user's oral cavity. Further, a toothbrush is replaced
at an appropriate time so that the toothbrush is used in a state in
which dental plaque removing efficiency of bristles is high.
Further, a personalized toothbrush shaft is manufactured and
provided.
BACKGROUND ART
[0002] As well known in the art, a toothbrush is an oral hygiene
instrument used with toothpaste.
[0003] A teeth cleaning method with a wooden toothpick is described
in Italy's health booklet around 1450. A toothbrush made of
bristles attached to a handle appeared in the 1600s and was made in
England in 1780. After World War II, a toothbrush made of nylon
bristles and an acrylic resin handle has been developed and is in
use.
[0004] There are various types of bristled portions are attached,
such as bombay type and straight type, but for oral hygiene, a
straight type is currently common. As a method of brushing teeth, a
rotation method is recognized worldwide, and an ergonomic angle is
given to a toothbrush handle to facilitate this method.
[0005] However, the conventional toothbrush as described above has
many problems as follows.
[0006] First, in a conventional toothbrush shaft, only one support
point for thumb force exists on the same surface as the surface on
which the bristles are located. This limits rotational displacement
in the up and down direction and induces a user to perform
standardized brushing.
[0007] Second, in the conventional toothbrush shaft, due to the
fact that only one support point for thumb force exists on the same
surface as the bristles, in order to reach the bristles in a
correct position when brushing in various directions, a user has to
lift up his/her elbow, bend his/her wrist, or tilt his/her head at
an angle, leading to low positional stability. Thus, during
brushing, the bristles deviate from a brushing area of target
teeth, which makes it difficult to accurately brush a user's teeth,
or causing mucosal damage.
[0008] Third, the conventional toothbrush shaft is used by forcibly
gripping a toothbrush handle with a user's all five fingers, and
thus the degree of freedom of movement is limited during brushing.
Additionally, excessive force is concentrated on the bristles,
which makes it difficult to accurately brush the target teeth, or
causing mucosal damage.
[0009] Fourth, in the conventional toothbrush shaft, the support
point for thumb force is formed, and two support points are formed
on the opposite side at upper and lower positions. Due to this
fact, during movement in the longitudinal axis direction of the
toothbrush, rotational force is created around the support points,
resulting that the bristles are shaken up and down relative to the
longitudinal axis of the toothbrush, which makes it difficult to
accurately brush the target teeth, or causing mucosal damage.
[0010] Fifth, in the conventional toothbrush shaft, due to the fact
that the support point for thumb force is formed, and two support
points are formed on the opposite side at upper and lower
positions, during movement in the transverse axis direction of the
toothbrush, rotational force is created around the support points,
resulting that the bristles are shaken up and down relative to the
longitudinal axis of the toothbrush, which makes it difficult to
accurately brush the target teeth, or causing mucosal damage.
[0011] Sixth, in the conventional toothbrush shaft, due to the fact
that the support point for thumb force is formed, and two support
points are formed on the opposite side at upper and lower
positions, during rotational movement of the toothbrush, another
rotational force is created around the support points, resulting
that the bristles are shaken up and down relative to the
longitudinal axis of the toothbrush, which makes it difficult to
accurately brush the target teeth, or causing mucosal damage.
[0012] Seventh, in the conventional toothbrush shaft, due to the
structure thereof, when the toothbrush shaft is placed on a sink,
the bristles are brought into contact with a sink or bathtub
surface, and when the toothbrush shaft is dropped on a floor, the
bristles are brought into contact with contaminants on the
floor.
[0013] Eighth, the conventional toothbrush shaft customarily
provides a handle structure in which the upper and lower surfaces
exist with respect to the bristles. This induces the user to
perform standardized brushing.
[0014] Ninth, in the conventional toothbrush shaft, two opposed
support points formed by a user's thumb and other four fingers mean
two vectors, and thus stability cannot be achieved by adjusting the
length of the vectors, and rotational force is continuously
generated.
[0015] Tenth, in the conventional toothbrush shaft, during brushing
a user's anterior teeth, there is less fixation by a user's cheeks
compared to a user's posterior teeth. In particular, the position
of the bristles is unstable due to rotational force generated by
fixing front and rear surfaces at two points, resulting that the
bristles are shaken up and down, which makes it difficult to
accurately brush the target teeth, or causing mucosal damage.
[0016] Eleventh, the conventional toothbrush shaft is designed for
people with normal body functions. This forces a user who has a
different arm length, hand length, and finger length (including a
person with disability) compared to a normal person to use the
toothbrush with inconvenience, or to use a special toothbrush for a
person with disability.
[0017] Twelfth, in the conventional toothbrush shaft, it is
difficult to exactly recognize a replacement time, so the use
period may be recognized by discoloration of the bristles
containing a material that changes color when replacement is
necessary, or by discoloration of the toothbrush handle, but the
effect is negligible.
[0018] In an effort to solve the above-mentioned problems, the
following related art documents have been applied, but there still
remains a problem in that not all of the above-mentioned problems
of the related art can be solved.
[0019] [Documents of Related Art]
[0020] (Patent Document 1) Korean Patent Application Publication
No. 10-1999-0071809 (1999, Sep. 27)
[0021] (Patent Document 2) Korean Patent Application Publication
No. 10-2013-0106734 (2013, Sep. 30).
[0022] (Patent Document 3) Korean Patent No. 10-1253594 (2013, Apr.
5)
[0023] (Patent Document 4) Korean Patent Application Publication
No. 10-2015-0138294 (2015, Dec. 9)
[0024] (Patent Document 5) Korean Utility Model Registration No.
20-0374520 (2005, Jan. 20)
DISCLOSURE
Technical Problem
[0025] In the present invention, a user's thumb (hereinafter
referred to as finger 1), a user's index finger (hereinafter
referred to as finger 2), a user's middle finger (hereinafter
referred to as finger 3), a user's ring finger (hereinafter
referred to as finger 4), a user's little finger (Hereinafter
referred to as finger 5) will be referred to as the above numbers
for convenience of explanation.
[0026] The present invention has been made keeping in mind the
above problems occurring in the related art, and a first objective
of the present invention is to provide a functional toothbrush
shaft including first, second, third finger support protrusions,
first and second support grooves, a rear round grip, a shoulder
grip, a bristle head support neck, and a bristle head. A second
objective of the present invention according to the above-described
technical configuration is to provide a functional toothbrush
shaft, wherein finger 1 is used as a support point through first
and second finger support protrusions (hereinafter, the finger
support protrusions will also be referred to as `structures`) at
any point of a toothbrush body throughout 360.degree. so that there
is no restriction of rotational displacement, and a third finger
support protrusion is additionally provided to allow fingers 1, 2,
and 3 to support a cylindrical surface of the toothbrush body at
two or three points. A third objective is to provide a functional
toothbrush shaft, wherein by supporting the cylindrical surface of
the toothbrush body at two or three points, displacement of
bristles during brushing is minimized, deviation from the range of
a target teeth brushing motion expected by a user is minimized, and
the amount of force applied to the bristles is appropriately
controlled thereby maximizing brushing efficiency while minimizing
side effects such as mucosal damage. A fourth objective of the
present invention is to provide a functional toothbrush shaft,
wherein three fingers 1, 2, and 3 form two or three support points
through the first and second finger support protrusions at a
position near the bristles, and fingers 4 and 5 and a user's palm
form one support point through a rear round grip, thereby forming a
total of at least three support points. A fifth objective of the
present invention is to provide a functional toothbrush shaft,
wherein by forming a triangular vector sum by three support points
or a quadrangular vector sum by four support points, it is possible
to obtain static stability with a zero resultant force, thereby
stably forming vibrations during movement in the longitudinal axis
direction of a toothbrush when brushing with the Bass technique,
without creating rotational force with respect to the direction of
movement. A sixth objective of the present invention is to provide
a functional toothbrush shaft, wherein when a vector sum of a small
three-point triangle or a four-point quadrangle is formed in a
user's hand to obtain positional stability, and then the toothbrush
shaft is held by the hand and placed on a user's teeth with a
user's armpit closed, it is easy to form a vector sum of a large
three-point triangle of the user's armpit, the user's hand, and the
user's teeth, which reduces displacement of brushing to brush
target teeth, thereby enabling stable and efficient brushing of the
target teeth with effective force, and minimizing a possibility
that bristles become splayed or interdental brush bristles become
bent or distorted. A seventh objective of the present invention is
to provide a functional toothbrush shaft, wherein positional
stability of the toothbrush shaft is maximized, thereby minimizing
mucosal damage in a user's oral cavity caused by the toothbrush
during brushing. An eight objective of the present invention is to
provide a functional toothbrush shaft, wherein by three structures
(finger support protrusions) for determining support point
positions, the center of gravity is placed at a rear end of the
toothbrush shaft thereby ensuring that even if the toothbrush shaft
is dropped on a floor, a handle is first brought into contact with
the floor; and the first structure always form a predetermined
angle with respect to the bristles to prevent the bristles from
contact with the floor, thereby implementing a function to prevent
contamination due to a contact surface. A ninth objective of the
present invention is to provide a functional toothbrush shaft,
wherein personalized motion suitability is maximized in accordance
with an anatomical structure of the user's hand, and personalized
anatomical suitability is further increased three-dimensional (3D)
scanning and printing thereby further increasing motion
suitability. A tenth objective of the present invention is to
provide a functional toothbrush shaft, wherein a toothbrush made of
the toothbrush shaft according to the present invention forms three
or four vectors, and thus even if the lengths of the three or four
vectors are controlled, a resultant force is zero thereby forming
and maintaining a stable structure, which ensures that if there are
three vectors, anyone (including a person with disability) who has
a different arm length, hand length, and finger length is able to
reliably brush his/her teeth. An eleventh objective of the present
invention is to provide a functional toothbrush shaft, wherein
during brushing of a user's anterior teeth, a first node of finger
2 is placed on the first and second structures, while left and
right sides of second and fourth structures are gripped by fingers
1 and 3 and fingers 4 and 5 and the user's palm are placed over a
third structure, thereby enabling stable brushing; during brushing
of a user's mandibular anterior teeth, with the toothbrush gripped
upside down, fingers 1 and 3 are placed between the first and
second structures while finger 2 is placed between the second and
fourth structures to form a three-point vector triangle, thereby
enabling stable brushing; and other various brushing methods are
calculated for each 360.degree.. A twelfth objective of the present
invention is to provide a functional toothbrush shaft, wherein the
toothbrush shaft enables brushing for users of various arm lengths,
hand lengths, and finger lengths (including people with
disabilities), and the toothbrush shaft is personalized in
accordance with a user's arm length, hand length, and finger
length, by three dimensional (3D) scanning and printing, thereby
increasing brushing efficiency. A thirteenth objective of the
present invention is to provide a functional toothbrush shaft,
wherein the toothbrush shaft is limited to a one-month use period
(when used once a day) by marking each month from January to
December on the toothbrush body as numbers or displaying twelve
colors thereon, so that the toothbrush shaft is replaced every
month and used in a state in which dental plaque removing
efficiency of the bristles is high, thereby providing a
psychological and educational effect to increase oral hygiene
awareness.
Technical Solution
[0027] In order to accomplish the above objectives, the present
invention provides a functional toothbrush shaft including a
toothbrush body including: handle, a bristle head support neck, and
a bristle head; and at least one finger support protrusion that
forms a stable resultant force by forming at least three support
points on the handle of the toothbrush body, prevents slipping of a
user's fingers to increase friction, and allows free gripping
throughout 360.degree. at any point of a cylindrical surface of the
toothbrush body.
[0028] Further, the present invention provides a method of
manufacturing a functional toothbrush shaft, the method being
capable of maximizing personalized motion suitability in accordance
with an anatomical structure of a hand of a user and further
increasing personalized anatomical suitability by three-dimensional
(3D) scanning and printing in manufacturing the functional
toothbrush shaft, the method including: inputting anatomical
structure data of the hand of the user including a person with
disability, into a computer; generating toothbrush shaft design
data conforming to the anatomical structure of the hand of the user
including the person with disability; transmitting, by the
computer, three-dimensional (3D) data to a three-dimensional (3D)
printer; and producing, by the 3D printer, a three-dimensional
toothbrush shaft on the basis of on the 3D data, thereby
manufacturing a personalized toothbrush shaft.
Advantageous Effects
[0029] According to the present invention as described above, the
toothbrush shaft includes first, second, third finger support
protrusions, first and second support grooves, a rear round grip, a
shoulder grip, a bristle head support neck, and a bristle head.
[0030] In the toothbrush shaft according to the present invention,
finger 1 is used as a support point through first and second finger
support protrusions (hereinafter, the finger support protrusions
will also be referred to as `structures`) at any point of the
toothbrush body throughout 360.degree. so that there is no
restriction of rotational displacement, and a third finger support
protrusion is additionally provided to allow all fingers 1, 2, and
3 to support a cylindrical surface of the toothbrush body at two or
three points.
[0031] Further, in the toothbrush shaft, by supporting the
cylindrical surface at two or three points that allow free movement
of all fingers, displacement of bristles during brushing is
minimized, deviation from the range of a target teeth brushing
motion expected by a user is minimized, and the amount of force
applied to the bristles is appropriately controlled thereby
maximizing brushing efficiency while minimizing side effects such
as mucosal damage.
[0032] Further, in the toothbrush shaft according to the present
invention, three fingers 1, 2, and 3 form two or three support
points through the first and second finger support protrusions at a
position near the bristles, and fingers 4 and 5 and a user's palm
form one support point through a rear round grip, thereby forming a
total of at least three support points.
[0033] Further, in the toothbrush shaft according to the present
invention, by forming a triangular vector sum by three support
points or a quadrangular vector sum by four support points, it is
possible to obtain static stability with a zero resultant force,
thereby stably forming vibrations during movement in the
longitudinal axis direction of a toothbrush when brushing with the
Bass technique, without creating rotational force with respect to
the direction of movement.
[0034] Further, in the toothbrush shaft according to the present
invention, when a vector sum of a small three-point triangle or a
four-point quadrangle is formed in a user's hand to obtain
positional stability, and then the toothbrush shaft is held by the
hand and placed on a user's teeth with a user's armpit closed, it
is easy to form a vector sum of a large three-point triangle of the
user's armpit, the user's hand, and the user's teeth, which reduces
displacement of brushing to brush target teeth, thereby enabling
stable and efficient brushing of the target teeth with effective
force, and minimizing a possibility that bristles become splayed or
interdental brush bristles become bent or distorted.
[0035] Further, in the toothbrush shaft according to the present
invention, positional stability of the toothbrush shaft is
maximized, thereby minimizing mucosal damage in a user's oral
cavity caused by the toothbrush during brushing.
[0036] Further, in the toothbrush shaft according to the present
invention, by three structures (finger support protrusions) for
determining support point positions, the center of gravity is
placed at the rear end of the toothbrush shaft thereby ensuring
that even if the toothbrush shaft is dropped on a floor, a handle
is first brought into contact with the floor; and the first
structure always form a predetermined angle with respect to the
bristles to prevent the bristles from contact with the floor,
thereby implementing a function to prevent contamination due to a
contact surface.
[0037] Further, in the toothbrush shaft according to the present
invention, personalized motion suitability is maximized in
accordance with an anatomical structure of the user's hand, and
personalized anatomical suitability is further increased by
three-dimensional (3D) scanning and printing thereby further
increasing motion suitability.
[0038] In particular, a toothbrush made of the toothbrush shaft
according to the present invention forms three or four vectors, and
thus even if the lengths of the three or four vectors are
controlled, a resultant force is zero thereby forming and
maintaining a stable structure, which ensures that if there are
three vectors, anyone (including a person with disability) who has
a different arm length, hand length, and finger length is able to
reliably brush his/her teeth.
[0039] Further, in the functional toothbrush shaft according to the
present invention, during brushing of a user's anterior teeth, a
first node of finger 2 is placed on the first and second
structures, while left and right sides of second and fourth
structures are gripped by fingers 1 and 3 and fingers 4 and 5 and
the user's palm are placed over a third structure, thereby enabling
stable brushing; during brushing of a user's mandibular anterior
teeth, with the toothbrush gripped upside down, fingers 1 and 3 are
placed between the first and second structures while finger 2 is
placed between the second and fourth structures to form a
three-point vector triangle, thereby enabling stable brushing; and
other various brushing methods are calculated for each
360.degree..
[0040] Further, the toothbrush shaft according to the present
invention enables brushing for users of various arm lengths, hand
lengths, and finger lengths (including people with disabilities),
and the toothbrush shaft is personalized in accordance with a
user's arm length, hand length, and finger length, by three
dimensional (3D) scanning and printing, thereby increasing brushing
efficiency.
[0041] Lastly, in the toothbrush shaft according to the present
invention, the toothbrush shaft is limited to a one-month use
period (when used once a day) by marking each month from January to
December on the toothbrush body as numbers or displaying twelve
colors thereon, so that the toothbrush shaft is replaced every
month and used in a state in which dental plaque removing
efficiency of the bristles is high, thereby providing a
psychological and educational effect to increase oral hygiene
awareness.
[0042] Hereinafter, exemplary embodiments of the present invention
for achieving these effects will be described in detail with
reference to the accompanying drawings.
DESCRIPTION OF DRAWINGS
[0043] FIG. 1 is a perspective view illustrating a functional
toothbrush shaft according to the present invention.
[0044] FIG. 2 is a front view illustrating the functional
toothbrush shaft according to the present invention.
[0045] FIG. 3 is a plan view illustrating the functional toothbrush
shaft according to the present invention.
[0046] FIG. 4 is a view illustrating photographs illustrating a
grip method of gripping a handle of a daily toothbrush according to
the present invention.
[0047] FIG. 5 is a view illustrating photographs illustrating a
grip method of gripping the handle of the daily toothbrush
according to the present invention (anterior teeth).
[0048] FIG. 6 is a view illustrating photographs illustrating a
grip method of gripping a handle of an interdental toothbrush
according to the present invention.
[0049] FIG. 7 is a view illustrating photographs illustrating a
grip method of gripping a handle of an advanced toothbrush
according to the present invention.
[0050] FIG. 8 is a view illustrating photographs illustrating a
basic method of using the daily toothbrush according to the present
invention.
[0051] FIG. 9 is a view illustrating photographs illustrating
various methods of using the daily toothbrush according to the
present invention.
[0052] FIG. 10 is a view illustrating photographs illustrating a
use state of the daily toothbrush according to the present
invention.
DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS
[0053] 100: toothbrush body [0054] 111, 112, 113: first, second,
third finger support protrusions [0055] 114, 115: first and second
support grooves [0056] 116: rear round grip [0057] 117: shoulder
grip [0058] 118: bristle head support neck [0059] 119: bristle head
[0060] 120: month indicator
BEST MODE
[0061] A functional toothbrush shaft according to the present
invention and a method of manufacturing the same are configured as
illustrated in FIGS. 1 to 10.
[0062] In the following description of the present invention,
detailed descriptions of known functions and components
incorporated herein will be omitted when it may make the subject
matter of the present invention unclear.
[0063] Further, technical terms, as will be mentioned hereinafter,
are terms defined in consideration of their function in the present
invention, which may be varied according to the intention of a
user, practice, or the like, so that the terms should be defined
based on the contents of this specification.
[0064] In the drawings, the size or and thickness of each component
is expressed arbitrarily for clarity of illustration, but due to
this, the protective scope of the present invention should not be
interpreted narrowly.
[0065] First, a toothbrush body 100 includes a handle 110, a
bristle head support neck 118, and a bristle head 119.
[0066] The present invention provides a functional toothbrush shaft
characterized by including at least one finger support protrusion
that forms a stable resultant force by forming at least three
support points on the handle 110 of the toothbrush body 100,
prevents slipping of a user's fingers to increase friction, and
allows free gripping throughout 360.degree. at any point of a
cylindrical surface of the toothbrush body.
[0067] In particular, a first finger support protrusion 111
protruding from an outer circumferential surface of the handle 110,
and
[0068] determining upper positions of a user's thumb and a user's
index finger is provided.
[0069] Further, a second finger support protrusion 112 determining
lower positions of the user's thumb and the user's index finger is
provided.
[0070] Further, a third finger support protrusion 113 determining a
position of a user's middle finger.
[0071] First and second support grooves 114 and 115 allowing a
user's fingers to be seated therein are provided between the first,
second, and third finger support protrusions 111, 112, and 113.
[0072] Further, a rear round grip 116 is provided at a rear end of
the handle 110 and allows a user's ring finger, a user's little
finger, and the user's palm to be placed and supported thereon.
[0073] Further, a shoulder grip 117 is provided between a front end
of the first finger support protrusion 111 and the bristle head
support neck 118 and allows the user's thumb and the user's index
finger to be placed thereon and prevented from slipping.
[0074] In particular, in the present invention, the center of
gravity of the toothbrush body 100 is placed at the rear end of the
handle 110 so that even if a toothbrush is dropped on a floor, the
handle is first brought into contact with the floor. Additionally,
the finger support protrusions form a predetermined angle with
respect to bristles and the bristle head support neck 118 is formed
inclinedly so that the bristles of the bristle head 119 are
prevented from contact with the floor and thus prevented from
contamination due to a contact surface.
[0075] Further, it is preferable that the handle 110 and the finger
support protrusion protruding outward from the handle are formed in
a circular shape to facilitate rotation.
[0076] Further, the toothbrush body 100 further includes a month
indicator 120 on which each month from January to December is
marked as numbers or twelve colors are displayed, so that the
toothbrush shaft is replaced every month and used in a state in
which dental plaque removing efficiency of the bristles is high,
thereby providing a psychological and educational effect to
increase oral hygiene awareness.
[0077] Lastly, the bristle head 119 may be made of various types of
brush heads, such as a daily brush head, advanced brush head,
interdental brush head, and infant brush head.
[0078] The present invention may be variously modified and have
various forms in applying the above-described components.
[0079] It should be understood that the present invention is not
limited to the particular forms mentioned in the detailed
description above, but rather includes all modifications,
equivalents, and substitutes within the spirit and scope of the
invention as defined by the appended claims.
[0080] Operational effects of the functional toothbrush shaft
according to the present invention configured as described above
will be described as follows.
[0081] First, according to the present invention, the finger
support protrusions of the toothbrush shaft form at three support
points by a finger support structure to form a stable resultant
force, and also prevents slipping of the user's fingers to increase
friction thereby enabling stable gripping. Additionally, the finger
support protrusions allows free gripping throughout 360.degree. at
any point of the cylindrical surface of the toothbrush body thereby
ensuring that the bristles reach any area in a user's oral cavity
stably.
[0082] To this end, FIG. 1 is a perspective view illustrating the
functional toothbrush shaft according to the present invention,
wherein the bristle head is a daily brush head.
[0083] FIG. 2 is a front view illustrating the functional
toothbrush shaft according to the present invention. By three
structures (finger support protrusions) for determining support
point positions of the toothbrush shaft, the center of gravity is
placed at the rear end of the toothbrush shaft thereby ensuring
that even if the toothbrush shaft is dropped on a floor, the handle
is first brought into contact with the floor. Additionally, a first
structure always form a predetermined angle with respect to the
bristles to prevent the bristles from contact with the floor,
thereby implementing a function to prevent contamination due to a
contact surface.
[0084] FIG. 3 is a plan view illustrating the functional toothbrush
shaft according to the present invention.
[0085] FIG. 4 illustrates photographs illustrating a grip method of
gripping a handle of the daily toothbrush according to the present
invention, illustrating the position of the user's thumb, a front
side of a bristle head, a left side of the bristle head, a right
side of the bristle head, and a rear side of the bristle head.
[0086] FIG. 5 illustrates photographs illustrating a grip method of
gripping the handle of the daily toothbrush according to the
present invention (anterior teeth), illustrating a method of using
the daily toothbrush upside down or upright.
[0087] FIG. 6 illustrates photographs illustrating a grip method of
gripping a handle of an interdental toothbrush according to the
present invention, illustrating sequentially, from the left, a rear
side of a bristle head when gripping by rear support of finger 3, a
front side of the bristle head upon gripping by rear support of the
finger 3 and left and right gripping of fingers 1 and 2 of
different heights, the front side of the bristle head upon gripping
by rear support of finger 3 and left and right gripping of fingers
1 and 2 of different heights, and a left buccal side and a right
lingual side of the front side of the bristle head upon gripping by
rear support of finger 3 and left and right gripping of fingers 1
and 2 of different heights.
[0088] FIG. 7 illustrates photographs illustrating a grip method of
gripping a handle of an advanced toothbrush according to the
present invention, illustrating sequentially, from the left, a
right lingual side and a left buccal side of a rear side of a
bristle head upon gripping by rear support of finger 2 and left and
right gripping of fingers 1 and 3, a right lingual side and a left
buccal side of a front side of the bristle head upon gripping by
rear support of finger 2 and left and right gripping of fingers 1
and 3, and a right side of the bristle head upon gripping by rear
support of finger 2 and left and right gripping of fingers 1 and
3.
[0089] The toothbrush shaft according to the present invention
ensures that the user's thumb is placed at any point of a
cylindrical surface of the handle 110 throughout 360.degree.,
thereby obtaining stable support.
[0090] That is, for example, when brushing lingual surfaces of a
user's mandibular teeth located in the rear of the oral cavity,
[0091] the user may brush his/her teeth and gums reliably,
conveniently, and efficiently without bending his/her wrist,
lifting his/her arm, or tilting his/her head.
[0092] In particular, a first point for keeping a user's armpit
closed by the user's arm being held against a user's body, a second
point for gripping a toothbrush handle, and a third point for
contact with a user's teeth are fixed to realize a stable closed
vector system with a short arm length from a user's elbow to a
user's wrist.
[0093] A method of using the toothbrush shaft according to the
present invention will be described in more detail as follows.
[0094] FIG. 8 is a view illustrating photographs illustrating a
basic method of using the daily toothbrush. This method allows the
user's thumb to support the toothbrush at any angle, and allows the
user's remaining fingers to be stably fixed in position by the
first, second, and third finger support protrusions 111, 112, and
113 and the first and second support grooves 114 and 115.
[0095] FIG. 9 is a view illustrating photographs illustrating
various methods of using the daily toothbrush according to the
present invention, and FIG. 10 is a view illustrating photographs
illustrating a use state of the daily toothbrush according to the
present invention.
[0096] The toothbrush shaft according to the present invention has
no rotational displacement limitation by allowing the user's thumb
to be used as a support point for first and second structures at
any point throughout 360.degree.. Further, by adding structure 4,
fingers 1, 2, and 3 may support both upper and lower surfaces of
the toothbrush during brushing.
[0097] Further, the toothbrush shaft according to the present
invention minimizes unnecessary displacement during brushing by
limiting the positions of the support points of a user's all
fingers, thereby minimizing deviation from the range of a brushing
motion expected by the user, resulting in maximized dental plaque
removing efficiency, which is the goal of brushing.
[0098] Further, in the toothbrush shaft according to the present
invention, three fingers 1, 2, and 3 form two upper and lower
support points through the first and second structures at a
position near the bristles, and fingers 4 and 5 and the user's palm
form one support point through a third structure, whereby a vector
triangle consisting of three sides in three-dimensional space.
[0099] Further, in the toothbrush shaft according to the present
invention, by forming a triangular vector sum by three support
points, it is possible to obtain static stability with a zero
resultant force, thereby forming vibration in the longitudinal axis
direction of the toothbrush and rotation in the transverse axis
direction of the toothbrush, without creating rotational force with
respect to each direction of movement.
[0100] Further, in the toothbrush shaft according to the present
invention, when a vector sum of a small three-point triangle of
fingers 1, 2, and 3, fingers 4 and 5, and the user's palm is formed
in a user's hand to obtain positional stability, and then the
toothbrush shaft is held by the hand and placed on the user's teeth
with the user's armpit closed, it is easy to form a vector sum of a
large three-point triangle of the user's armpit, the user's hand,
and the user's teeth. Thus, it is possible to reduce displacement
of brushing of target teeth, thereby enabling stable and efficient
brushing of the target teeth, resulting in maximized dental plaque
removal efficiency.
[0101] Further, positional stability of the toothbrush shaft
according to the present invention is maximized thereby minimizing
mucosal damage in the oral cavity caused by the toothbrush during
brushing.
[0102] Further, by the first structure for determining a support
point position of the toothbrush shaft according to the present
invention, the center of gravity is placed at the rear end of the
handle of the toothbrush shaft thereby ensuring that even if the
toothbrush shaft is dropped on a floor, the handle is first brought
into contact with the floor. Additionally, the first structure
always form a predetermined angle with respect to the bristles to
prevent the bristles from contact with the floor, thereby
implementing a function to prevent contamination due to a contact
surface.
[0103] Further, the toothbrush shaft according to the present
invention may be manufactured by three-dimensional (3D) scanning
and printing in accordance with an anatomical structure of the
user's hand, thereby further maximizing motion suitability.
[0104] Further, in the toothbrush shaft according to the present
invention, three vectors are formed, and thus even if the lengths
of the three vectors are controlled, a resultant force may be zero
thereby forming and maintaining a stable structure. This means that
if there are three vectors, anyone (including a person with
disability) who has a different arm length, hand length, and finger
length is able to reliably brush his/her teeth.
[0105] Lastly, in the toothbrush shaft according to the present
invention, during brushing of the user's anterior teeth, a first
node of finger 2 is placed on the first and second structures,
while left and right sides of the second and fourth structures are
gripped by fingers 1 and 3 and fingers 4 and 5 and the user's palm
are placed over the third structure, thereby enabling stable
brushing. Further, during brushing of a user's mandibular anterior
teeth, with the toothbrush gripped upside down, fingers 1 and 3 are
placed between the first and second structures while finger 2 is
placed between the second and fourth structures to form a
three-point vector triangle, thereby enabling stable brushing.
Other various brushing methods may be calculated for each
360.degree..
[0106] Further, the present invention provides a method of
manufacturing a functional toothbrush shaft, the method being
capable of maximizing personalized motion suitability in accordance
with the anatomical structure of the user's hand and further
increasing personalized anatomical suitability by three-dimensional
(3D) scanning and printing in manufacturing the functional
toothbrush shaft, the method including: inputting anatomical
structure data of the hand of the user including a person with
disability, into a computer; generating toothbrush shaft design
data conforming to the anatomical structure of the hand of the user
including the person with disability; transmitting, by the
computer, three-dimensional (3D) data to a three-dimensional (3D)
printer; and producing, by the 3D printer, a three-dimensional
toothbrush shaft on the basis of on the 3D data, thereby
manufacturing a personalized toothbrush shaft.
INDUSTRIAL APPLICABILITY
[0107] The technical idea of a functional toothbrush shaft
according to the present invention is that the same repeated
results can be achieved in practice. In particular, the present
invention can promote technological development, which contributes
to industrial development, and thus the present invention is worth
protecting.
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