Information
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Patent Grant
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6374450
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Patent Number
6,374,450
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Date Filed
Wednesday, April 12, 200024 years ago
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Date Issued
Tuesday, April 23, 200222 years ago
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Inventors
-
-
Examiners
Agents
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CPC
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US Classifications
Field of Search
US
- 015 1671
- 015 172
- 015 1761
- 015 1766
- 015 201
- 015 202
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International Classifications
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Abstract
A toothbrush which can be adjusted suitably depending on the detentition and the like of a user for individual use, the toothbrush consisting essentially of a grip handle and a head attached to a distal end of the handle, the head having a multiplicity of bristles implanted on a surface thereof; where the head is an assembly of head segments arranged in a row, each having a through hole defined substantially at the center; the handle has at the distal end thereof a support shaft to be inserted to the through holes of the head segments to support them; the support shaft and the through holes together constitute a locking mechanism that locks the head segments at selected angular positions respectively with respect to the support shaft so that orientations of the bristles in the head segments are changed.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a toothbrush composed essentially of a grip handle and a head supported at its distal end, particularly to a toothbrush which is designed to be adjustable for individual use depending on the dentition and size of the mouth.
DESCRIPTION OF THE RELATED ART
There are available various types of toothbrushes each composed essentially of a grip handle and a head supported at its distal end, in terms of handle configuration, head size, rigidity of bristles implanted in the head, etc. Users can select optimum ones depending on their use conditions including the size of the mouth and the like, for example, from those whose handles are curved, those having small heads, those in which the rigidity of bristles implanted in the heads is changed locally, etc.
However, since dentition including occlusion varies greatly depending on individual users, it is sometimes difficult to select an applicable toothbrush from the variations described above.
That is, the conventional ready-made toothbrushes are not designed to be applicable to the individual dentition, but users must compromise on their tooth conditions with the ready-made toothbrushes, so that it is extremely unlikely that the ready-made toothbrushes provide the optima for users.
SUMMARY OF THE INVENTION
It is an objective of the present invention to provide a toothbrush which can suitably be adjusted for individual uses depending on the conditions including dentition and the like that vary depending on the individual users, which can clean not only teeth but also oral mucosa, gingivae, tongue and all others in the oral cavity and which can be adjusted depending on the individual use.
In order to overcome the problem described above, the gist of the present invention is a toothbrush consisting essentially of a grip handle and a head formed at the distal end of the handle, the head having a multiplicity of bristles implanted on a surface thereof; wherein the head consists of a plurality of head segments each having a through hole defined substantially at the center; and the head segments are designed to be locked at desired angular positions respectively with respect to the handle such that orientations of the bristles in the head segments can be changed from segment to segment.
The above toothbrush can be embodied according to various constitutions to be described later.
The handle is provided at the distal end with a support shaft which penetrates the head segments to support them thereon. The support shaft is provided with locking means for locking the head segments at predetermined angles respectively with respect to the support shaft. The head segments supported by the support shaft penetrating them are designed to be locked using fixing means such as welding, adhesive, etc.
Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings illustrated by way of examples the principles of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention together with the objects and advantages thereof, may best be understood by reference to the following description of the presently preferred embodiment together with the accompanying drawings in which:
FIG. 1
is a perspective view showing a relevant portion of the toothbrush according to one embodiment of the present invention;
FIG. 2
is an enlarged perspective view showing an explosion of the toothbrush shown in
FIG. 1
; and
FIGS.
3
(A) to
3
(C) show in enlarged cross-sectional view other examples of the support shaft.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention will be described by way of a preferred embodiment referring to the attached drawings.
FIG. 1
is a perspective view showing a toothbrush according to one embodiment of the present invention. The toothbrush
11
is composed essentially of a grip handle
21
and a head
31
which is formed at the distal end of the handle
21
and has a multiplicity of bristles
91
implanted thereon. The head
31
is an assembly of a plurality of head segments
41
arranged in a row. The head segments
41
are separate bodies and are designed to be turned by predetermined angles respectively with respect to a support shaft
51
(to be described later) and are locked as such thereon so that orientations of the bristles
91
in the head segments can be changed from segment to segment.
The corners of the head segments
41
and of the handle
21
are rounded not to hurt the mouth during brushing and imparting massaging function to the toothbrush
11
.
FIG. 2
is an enlarged perspective view showing an explosion of the toothbrush shown in FIG.
1
.
A support shaft
51
is fixed to the distal end of the handle
21
. The support shaft
51
penetrates the head segments
41
to support them thereon. Meanwhile, a through hole
41
a having the same profile as that of the support shaft
51
is defined in each head segment
41
substantially at the center, and the support shaft
51
is inserted to the through holes
41
a
to lock the head segments
41
thereon.
In this case, the support shaft
51
and the through holes
41
a
of the head segments
41
together constitute locking means so as to lock the head segments
41
at desired predetermined angular positions respectively with respect to the support shaft
51
. While the support shaft
51
and the through holes
41
a
in this embodiment have a hexagonal profile so as to constitute the locking means, the profile of the former and the latter may not particularly be limited to it. So as to constitute the locking means, for example, the hexagonal profile of the support shaft may be replaced with a regular polygon (see FIG.
3
(A)), or grooves or ribs of the same profile may be formed in the longitudinal direction at equiangular positions (see FIGS.
3
(B) and
3
(C)). Meanwhile, a through hole having a profile capable of receiving the support shaft is defined in each head segment
41
.
Formation of the support shaft
51
and the through holes
41
a
with small sectorial angles enables finer angle adjustment in turning the head segments
41
. Meanwhile, if the longitudinal dimension of each head segment
41
is reduced or the number of the head segments
41
is increased, more diversified angular combinations can be achieved.
For locking of the head segments
41
, there is employed a technique of fixing the support shaft
51
with the head segments
41
and also between the adjacent head segments
41
one another using an adhesive. In addition, the distal end of the support shaft
51
may be subjected to anti-loosening treatment in the absence or presence of an adhesive, for example, caulking, welding and bolting. Further, there may also be employed a technique where a thread is formed at the distal end portion of the support shaft
51
, and after insertion of the support shaft
51
to the through holes
41
a
of the head segments
41
, the protruding threaded portion is engaged with a nut to fasten them.
In addition to the above constitutions, it is also possible to form a fitting structure capable of selectively positioning the head segments with respect to one another in terms of angle, for example, boss-and-dent engagement surfaces formed on the handle end face and on each end face of each head segment
41
, and a round support shaft may be inserted to these head segments
41
. Alternatively, a round support shaft may be inserted to head segments which may be fixed thereto using an adhesive to achieve orientation of the bristles in the respective head segments at desired angles.
As described above, in the toothbrush
11
according to this embodiment, the bristles
91
in each head segment
41
can be oriented in a desired direction by turning and locking each head segment
41
at a desired angle taking conditions of a user into consideration. Thus, toothbrushes well adjusted for individual uses respectively can be obtained easily and securely in spite of the simple structure. Further, the uneven side faces of the head segments
41
exhibit effect of massaging gingivae.
The toothbrush according to the present invention brings about the following effects.
Since the bristles implanted in the head segments are designed to be oriented outward or in a desired direction in the above toothbrush, the orientation of the bristles of the brush can be changed locally depending on the dentition of a user, thus providing a toothbrush which has a simple structure and yet can cope with conditions of individual users easily and accurately. In addition, since the rows of bristles assume a configuration matching the tooth surface, a simple brushing motion can prevent effectively tooth and intraoral diseases.
Although only one embodiment of the present invention has been described herein, it should be apparent to those skilled in the art that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention.
Therefore, the present examples and embodiments are to be considered as illustrative and not restrictive, and the invention is not to be limited to the details given herein, but may be modified within the scope of the appended claims.
Claims
- 1. A toothbrush, comprising:a grip handle; and a toothbrush head formed at a distal end of the handle, the toothbrush head having a multiplicity of bristles implanted on a surface thereof, wherein the toothbrush head consists of a plurality of toothbrush head segments each having bristles planted thereon with all of said bristles rising substantially unidirectionally therefrom, the handle has at the distal end thereof a support shaft to be inserted into the toothbrush head segments to support them on the support shaft so that orientations of the bristles in one or more brush segments are fixed, and the support shaft constituting a locking mechanism that locks the toothbrush head segments at selected angular positions respectively with respect to the support shaft.
- 2. A brush, comprising:a grip handle; and a head formed at a distal end of the handle, the head having a multiplicity of bristles implanted on a surface thereof, wherein the head consists of a plurality of head segments each having bristles planted thereon with all of said bristles rising substantially unidirectionally therefrom, the handle has at the distal end thereof a support shaft to be inserted into the head segments to support them on the support shaft so that orientations of the bristles in one or more head segments are fixed, and the support shaft constituting a locking mechanism that locks the head segments at selected angular positions respectively with respect to the support shaft.
Priority Claims (1)
Number |
Date |
Country |
Kind |
11-112913 |
Apr 1999 |
JP |
|
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
Date |
Country |
624149 |
Jul 1927 |
FR |
943590 |
Dec 1963 |
GB |