TOOTHBRUSH

Abstract

Conventional toothbrushes must be destroyed and incinerated as refuse after use, resulting in a waste of resources and generating carbon dioxide. A toothbrush is provided separately with: a cylindrical toothbrush portion for attaching a replaceable toothbrush portion, said cylindrical portion provided with an uneven portion to prevent the end portion of the toothbrush swinging in a left to right direction when the cylindrical portion is provided fitted to the end portion of the toothbrush handle; and the replaceable toothbrush portion. Thus, after an appropriate period of use, the replaceable toothbrush can be easily exchanged. The purpose of the invention is to provide a toothbrush which has a toothbrush handle for repeated reuse, and which enables a significant contribution to the reduction of carbon dioxide by a reduction in refuse.

Description

TECHNICAL FIELD

The invention is directed to a toothbrush having male and/or female parts on an installation head at a fore-end of the toothbrush, on the lateral surfaces of a replaceable bristle part and on the toothbrush body.

BACKGROUND OF THE INVENTION

In some conventional toothbrushes, the whole fore-end of the toothbrush which constitutes ⅓ of the full length of the toothbrush can be exchanged. In addition, toothbrushes other than those mentioned above are usually discarded as a trash after use. These discarded toothbrushes generate collection costs and carbon dioxide when transport and incineration are performed.

DISCLOSURE OF THE INVENTION

Technical Problem

Discarding an entire toothbrush after use was the only method for conventional toothbrushes.

In addition, a conventional installation head at the fore-end of the toothbrush, as the head is formed thin and oval, can become separated during use, and can damage the mouth by splitting and/or breaking since the head is shaking from side to side.

This invention solves the problems of the compositions of conventional toothbrushes. The purposes of this invention are to permit repeated use of a toothbrush body for a long period and to reduce the consumption of resources and carbon dioxide production by installing curved or “<” shaped male and female parts at lateral surfaces of both an exchangeable bristle part and the head of the fore-end of tooth brush body, thereby making it possible to assemble and detach the bristle part with ease and freely and to exchange the bristle part with ease.

Means for Solving the Problem

This section explains the toothbrush invention in order to solve the challenges described above.

A toothbrush (1, 2, 3) according to the present invention is characterized by a toothbrush body (4, 5, 6) having a fore-end; a head (7, 8, 9) having a circular female part (12, 13, 14) or male part (15, 16, 17) and being located at the fore-end of the toothbrush body; and a replaceable bristle part (11) having bristles (19) installed at a board (10) with a circular female part (12, 13, 14) or male part (15, 16, 17), the circular female part or male part of the board (10) being attached to the circular male part or female part of the head (7, 8, 9) by mutual elastic deformation, the circular female part (14) or male part (17) of the head (7, 8, 9) and the circular female part (14) or male part (17) of the board (10) being aligned with the toothbrush body (4, 5, 6).

Because the installation head at the fore-end of the toothbrush body as described above has a thin and oval shape in front of the rod shaped toothbrush body, it separates during tooth brushing, shakes laterally, cracks, fractures and may damage the mouth. As such, it is desirable that the plastic materials used in the toothbrush body are soft and do not have cracking or fracturing characteristics such as those of elastic polypropylene.

However, as both the inner lateral surfaces of the head (32) for the bristle part (33) at the fore-end of the toothbrush body (31) of the conventional toothbrush (3) fore-end lateral surfaces at the bristle and the part (33) are curved or “<” shaped in FIG. 70 when the toothbrush (30) in FIG. 70 is used as described above, the fore-end head portion at the toothbrush body for bristle part (33) shakes laterally.

Because of this, the present toothbrush invention is characterized in that shaking is prevented between the male part (17) or female part (14) of the board (10) having the toothbrush body (4, 5, 6) direction and the female part (14) or male part (17) of the head (7, 8, 9) having the toothbrush body (4, 5, 6) direction.

In addition, although not drawn, the shape of the male and female parts are preferably curved and/or in a “<” shape. But if it's possible to be assembled and detached and prevents detaching while brushing teeth, the shape is not confined to a specific form.

As described above, the oval shapes of the head (7, 8, 9) of the toothbrush (1, 2, 3) and the board (4) are preferable, but not confined.

In addition, though it is desirable for the shape of the upper surface of a bristle part, when assembled in the head to be parallel (same surface) or in a curved shape relative to the upper surface, the shape is not confined to this specific form so long as it does not cause scars in the mouth.

In addition, although it is desirable for the male and female shapes on bristle part and toothbrush body to be capable of assembly and fit snugly and symmetrically, it is not confined to this embodiment.

In addition, when the bristle part is assembled in the head, the stopper for preventing drop out is located around the bottom of bristle part.

In addition, though it is desirable for the shape of outer stem surface of the stopper to have the same shape as the external lateral surface around the bottom of the head, but is not confined to this embodiment.

EFFECT OF INVENTION

After use, there is no need to destroy a whole toothbrush. By only exchanging a bristle head, it is possible to reuse the body of a toothbrush continuously for a long period.

Reuse of the toothbrush (1, 2, 3) and the board (4) are desirable, but not so confined.

As a result, it is possible to perform a cut of raw material, in addition, as an indirect effect, it becomes possible to reduce carbon dioxide emissions that occur during raw material transport or product manufacturing processes, etc.

In addition, for trash reduction, it becomes possible to reduce transportation or incineration maintenance, etc. which are related to conventional disposal.

In addition, as an effect of reducing trash, at the same time, incineration expenses of incineration processing amount and etc. may be reduced, and a large reduction in carbon dioxide emissions will be possible.

In addition, this toothbrush can contribute to reducing carbon dioxide emissions and saving of raw materials by simply exchanging the bristle part and reusing rather than discarding the whole toothbrush for average 2-3 months at a time.

In addition, except for hotel and/or electric toothbrush uses, the total consumption amount of the toothbrush is statistically 300 to 400 million pieces a year. Additionally, about 6 thousand tons of plastics and packing materials are consumed. If a toothbrush body is used for 2-3 years, carbon dioxide emission may be reduced during any incineration process and there will be large amounts of raw material reduction.

In addition, materials used for exchangeable bristle parts are extremely small and require cheap production unit prices, and thus, providing cheap toothbrushes becomes possible.

In addition even though there is now a high level of eco-awareness about global warming according to TV or newspaper surveys, it is hard for people to know specifically what methods there are to participate in the environmental protection movement in their lives even if they are eager to. However, in the case of toothbrushes used by most people in their lives, even if it is small, this bristle part exchangeable toothbrush makes people have a sense that they are involved in the environmental protection movement.

However, in case of using a toothbrush which includes an assembly of the bristle part to the head on the fore-end of the toothbrush body, as described in FIG. 70, so the lateral surfaces (36, 37) of head (32) for the bristle part (33) at the fore-end of the toothbrush body (31) of the toothbrush (30) are curved and/or “<” shaped female-male parts (34, 35), the fore-end part of the toothbrush which has bristle part (33) shakes laterally on use.

As a way to solve the undesirable mechanism mentioned above, the present invention is characterized in that shaking is prevented between the male part (17) or female part (14) of board (10) having toothbrush (1, 2, 3) direction and the female part (14) or male part (17) of the head (7, 8, 9) having toothbrush (1, 2, 3) direction.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plane figure of a toothbrush body fore-end.

FIG. 2 is a plane figure of a bristle head.

FIG. 3 is a lateral view of a bristle head.

FIG. 4 is a lateral view of a toothbrush with FIG. 3 being installed in FIG. 1.

FIG. 5 is a basal view of FIG. 4.

FIG. 6 is FIG. 4's A-A′ line cross-sectional view.

FIG. 7 is a plane figure of a toothbrush body fore-end.

FIG. 8 is a plane figure of a bristle head.

FIG. 9 is a lateral view of a bristle head.

FIG. 10 is a lateral view of a toothbrush with FIG. 9 being installed in FIG. 7.

FIG. 11 is a basal view of FIG. 10.

FIG. 12 is FIG. 10's A-A′ line cross-sectional view.

FIG. 13 is a plane figure of a toothbrush body fore-end.

FIG. 14 is a plane figure of a bristle head.

FIG. 15 is a lateral view of a bristle head.

FIG. 16 is a lateral view of a toothbrush with FIG. 15 being installed in FIG. 13.

FIG. 17 is a basal view of FIG. 16.

FIG. 18 is FIG. 16's A-A′ line cross-sectional view.

FIG. 19 is a plane figure of a toothbrush body fore-end.

FIG. 20 is a plane figure of a bristle part.

FIG. 21 is a lateral view of a bristle part.

FIG. 22 is a lateral view of a toothbrush with FIG. 21 being installed in FIG. 19.

FIG. 23 is a basal view of FIG. 22.

FIG. 24 is FIG. 22's A-A′ line cross-sectional view.

FIG. 25 is a plane figure of a toothbrush body fore-end.

FIG. 26 is a plane figure of a bristle part.

FIG. 27 is a lateral view of a bristle part.

FIG. 28 is a lateral view of a toothbrush with FIG. 27 being installed in FIG. 25.

FIG. 29 is a basal view of FIG. 28.

FIG. 30 is FIG. 28's A-A′ line cross-sectional view.

FIG. 31 is a plane figure of a toothbrush body fore-end.

FIG. 32 is a plane figure of a bristle part.

FIG. 33 is a lateral view of a bristle part.

FIG. 34 is a lateral view of a toothbrush with FIG. 33 being installed in FIG. 31.

FIG. 35 is a basal view of FIG. 34.

FIG. 36 is FIG. 34's A-A′ line cross-sectional view.

FIG. 37 is a plane figure of a toothbrush body fore-end.

FIG. 38 is a basal view of FIG. 37.

FIG. 39 is a plane figure of a bristle part.

FIG. 40 is a basal view of FIG. 39.

FIG. 41 is a lateral view of a bristle part.

FIG. 42 is a C-C′ line cross-sectional view with FIG. 41's bristle part being attached in FIG. 37.

FIG. 43 is a lateral view of a bristle part.

FIG. 44 is a C-C′ line cross-sectional view with FIG. 43's bristle part being attached in FIG. 37.

FIG. 45 is a lateral view of a bristle part.

FIG. 46 is a C-C′ line cross-sectional view with FIG. 45's bristle part being attached in FIG. 37.

FIG. 47 is a lateral view of bristle part.

FIG. 48 is a C-C′ line cross-sectional view with FIG. 47's bristle part being attached in FIG. 37.

FIG. 49 is a lateral view of bristle part.

FIG. 50 is a C-C′ line cross-sectional view with FIG. 49's bristle part being attached in FIG. 37.

FIG. 51 is a lateral view of bristle part.

FIG. 52 is a C-C′ line cross-sectional view with FIG. 51's bristle part being attached in FIG. 37.

FIG. 53 is a plane figure of a toothbrush body fore-end.

FIG. 54 is a basal view of FIG. 53 with FIG. 55's bristle part being attached.

FIG. 55 is a plane figure of a bristle part.

FIG. 56 is FIG. 55's bristle part's basal plane.

FIG. 57 is a lateral view of a bristle part.

FIG. 58 is a D-D′ line cross-sectional view with FIG. 57's bristle part being attached to FIG. 53's toothbrush body.

FIG. 59 is a lateral view of a bristle part.

FIG. 60 is a D-D′ line cross-sectional view with FIG. 59's bristle part being attached to FIG. 53's toothbrush body.

FIG. 61 is a later view of a bristle part.

FIG. 62 is a D-D′ line cross-sectional view with FIG. 61's bristle part being attached to FIG. 53's toothbrush body.

FIG. 63 is a lateral view of a bristle part.

FIG. 64 is a D-D′ line cross-sectional view with FIG. 63's bristle part being attached to FIG. 53's toothbrush body.

FIG. 65 is a lateral view of a bristle part.

FIG. 66 is a D-D′ line cross-sectional view with FIG. 65's bristle part being attached to FIG. 53's toothbrush body.

FIG. 67 is a lateral view of a bristle part.

FIG. 68 is a D-D′ line cross-sectional view with FIG. 67's bristle part being attached to FIG. 53's toothbrush body.

FIG. 69 is a B-B′ line cross-sectional view of a bristle part.

FIG. 70 is a reference drawing expressing a fore-end of brush that is shaking to the left and right.

THE BEST FORM FOR IMPLEMENTATION OF INVENTION

As described below, this invention's implementation described by example 1 is explained by FIGS. 1 to 6.

FIG. 1 is a plane figure of a toothbrush body (4) of toothbrush (1) which has an installation head (7) at a fore-end part. Fore-end inner lateral surfaces (21, 22) of toothbrush body (4) are connected to the head (7) which has reciprocal curvatures for installing the bristle part (11) in FIG. 3 which has curved lateral male parts (15, 16, 17). Both sides of head (7) and toothbrush body (11) have female and male parts (14, 17) to prevent the fore-end of the toothbrush from shaking while brushing with the toothbrush (1).

FIG. 2 is a plane figure of bristle part (11) with board (10) which is attached to the head (7).

Elements 23 and 24 are both left and right lateral surfaces. Element 17 is a male part of bristle part (11) for preventing shaking when connected to female part (14), in FIG. 1.

Element 20 is the stopper to prevent dropping out when assembled to the head (7).

In FIG. 3, Element 20 is the stopper as a dropping prevention mechanism when the bristle part (11) is assembled to the head (7) around the bottom of the board (10). Elements 15, 16, 17 of both lateral fore-end are convex male parts. Especially, element 17 is the male part to prevent the fore-end of the bristle part from lateral shaking. Element 19 is bristle enrooted. This is a lateral view of male parts (15, 16, 17) with the shaking prevention curvatures on the bristle part (11).

In FIG. 4, Element 1 is toothbrush, and Element 4 is toothbrush body. This is a lateral view of a fore-end of the toothbrush (1) which represents both bristle part (11) of FIG. 3 and head (7) at the fore-end of the brush (4) for bristle part (11). Element 19 is bristles of a toothbrush. Element 20 is the stopper as described above.

FIG. 5 is FIG. 4's basal view. Element 10 is a board, Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 20 is a stopper described above, Element 19 is rooted brushes, Element 14 represents female part (14) in board and male part (17) in toothbrush body (4) as a shaking prevention device when bristle part (11) is assembled to toothbrush body (4).

FIG. 6 is FIG. 4's A-A′ line cross-sectional view. Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 10 is a head, Element 11 is a bristle part, Element 19 is bristles and Element 20 is a stopper. Element 12, 14 are female parts (12, 14) which have a concave inside (21, 22) of the toothbrush body (4). Element 14, 17 are male parts which have a convex lateral (23, 24) to bristle part (11).

This implementation example is toothbrush (1) as stated above, and the stopper (20) at bristle part (11) is designed to protrude from the bottom of the head (7) when the bristle part (11) is assembled to the head (7) of the toothbrush body (4).

As described below, example 2's of this invention is shown by FIG. 7 to FIG. 12.

FIG. 7 is a plane figure of toothbrush body (4) of toothbrush (1) which has installation head (7) at the fore-end part. Fore-end inner lateral surfaces (21, 22) of toothbrush body (4) are head (7) which have reciprocal curvatures to admit the bristle part (11) of FIG. 3 which has curved lateral male parts (15, 16, 17). Both sides of head (7) and toothbrush body (11) have female and male parts (14, 17) to prevent the fore-end of the toothbrush from shaking while brushing with the toothbrush (1).

FIG. 8 is a plane figure of bristle part (11) with board (10) which is attached to the head (7). Elements 23, 24 are both left and right lateral surfaces. Element 17 is a male part of bristle part (11) for preventing shaking when attached to female part (14), in FIG. 1.

Element 20 is the stopper to prevent dropping when assembled to the head (7).

In FIG. 9, Element 20 is the stopper as a dropping prevention mechanism when the bristle part (11) is assembled to the head (7) around the bottom of the board (10). Elements 15, 16, 17 of both lateral fore-ends are convex male parts. Especially, Element 17 is the male part to prevent the fore-end of the bristle part from lateral shaking. Element 19 is enrooted bristles. This is a lateral view of male parts (15, 16, 17) with the shaking prevention curvatures on the bristle part (11).

In FIG. 10, Element 1 is a toothbrush, and Element 4 is a toothbrush body. This is lateral view of fore-end of the toothbrush (1) which represents both bristle part (11) of FIG. 9 and head (7) at the fore-end of the brush (4) for bristle part (11). Element 19 is bristles. Element 20 is the stopper as described above.

FIG. 11 is FIG. 10's basal view. Element 10 is a board, Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 20 is the aforementioned stopper, Element 19 is rooted brushes, and Element 14 represents female part(14) in the board and male part (17) in the toothbrush body (4) as a shaking prevention device when bristle part(11) is assembled to toothbrush body (4).

FIG. 12 is FIG. 4's A-A′ line cross-sectional view. Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 10 is a head, Element 11 is a bristle part, Element 19 is bristles and Element 20 is a stopper. Elements 12, 14 are female parts (12, 14) which have concave inside (21, 22) of the toothbrush body (4). Element 14, 17 are male parts which have convex lateral (23, 24) to bristle part (11).

This implementation example is constituted toothbrush (1) described above. It is formed to be in the same plane (even level) between the head (7) base and the stopper (20) of the bristle part (11) when bristle part (11) is attached to the head (7) of the toothbrush body (4).

As follows, the form of the invention's third exemplary implementation is shown by FIGS. 13 to 18.

FIG. 13 is a plane figure of toothbrush body (4) of toothbrush (1) which has installation head (7) at the fore-end part. Fore-end inner lateral surfaces (21, 22) of toothbrush body (4) are head (7) which has reciprocal curvatures to admit the bristle part (11) in FIG. 3 which has curved lateral male parts (15, 16, 17). Both sides of head (7) and toothbrush body (11) have female and male parts (14, 17) to prevent the fore-end of the toothbrush from shaking while brushing with the toothbrush (1).

FIG. 14 is a plane figure of bristle part (11) with board (10) which is attached to the head (7). Elements 23, 24 are both left and right lateral surfaces. Element 17 is male part of bristle part (11) for preventing shaking when attached to female part (14), in FIG. 1.

Element 20 is the stopper to prevent dropping when assembled to the head (7).

In FIG. 15, Element 20 is the stopper to prevent dropping when the bristle part (11) is attached to the head (7) around the bottom of the board (10). Elements 15, 16, 17 of both lateral fore-ends are convex male parts. Especially, Element 17 is the male part to prevent the fore-end of the bristle part from shaking laterally. Element 19 is rooted bristles. This is a lateral view of male parts (15, 16, 17) with the shaking prevention curvatures on the bristle part (11).

In FIG. 16, Element 1 is a toothbrush, and Element 4 is a toothbrush body. This is lateral view of the fore-end of the toothbrush (1) which represents both bristle part (11) of FIG. 15 and head (7) at the fore-end of the brush (4) for bristle part (11). Element 20 is a stopper, Element 19 is bristles.

FIG. 17 is FIG. 16's basal view. Element 10 is a board, Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 20 is the aforementioned stopper, Element 19 is rooted brushes, and Element 14 represents female part (14) in the board and male part (17) in toothbrush body (4) as a shaking prevention device when bristle part (11) is attached to toothbrush body (4).

FIG. 18 is FIG. 4's A-A′ line cross-sectional view. Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 10 is a head, Element 11 is a bristle part, Element 19 is bristles and Element 20 is a stopper. Elements 12, 14 are female parts (12, 14) which have concave inside (21, 22) of the toothbrush body (4). Element 14, 17 are male parts which have convex lateral (23, 24) to bristle part (11).

This implementation example is the toothbrush (1) as described above, it is formed to be in the same level between the bottom of the head (7) and the bottom of the male part (16, 17) of the bristle part (11), when the bristle part (11) is assembled to the head (7) of the toothbrush body (4).

As described below, example 4 of implementing the invention is explained by FIGS. 19 to 24.

FIG. 19 is a plane figure of toothbrush body (4) of a toothbrush (1) which has an installation head (7) at the fore-end part. Fore-end inner lateral surfaces (21, 22) of toothbrush body (4) are head (7) which is “<” shaped to admit the bristle part (11) in FIG. 3 which has “<” shaped both right and left lateral male parts (15, 16, 17). Both sides of head (7) and toothbrush body (11) have female and male parts (14, 17) to prevent the fore-end of the toothbrush from shaking during brushing with the toothbrush (1).

FIG. 20 is the plane figure of bristle part (11) with board (10) which is attached to the head (7). Elements 23, 24 are both left and right lateral surfaces. Element 17 is male part of bristle part (11) for preventing shaking when attached to female part (14), in FIG. 1.

Element 20 is the stopper for preventing dropping when attached to the head (7).

In FIG. 21, Element 20 is the stopper for preventing dropping when the bristle part (11) is attached to the head (7) around the bottom of the board (10). Elements 15, 16, 17 of both lateral fore-end are “<” shaped male parts. Especially, Element 17 is the male part to prevent the fore-end of the bristle part from shaking laterally. Element 19 is rooted bristles. This is a lateral view of male parts (15, 16, 17) with the shaking prevention “<” shape on the bristle part (11).

In FIG. 22, Element 1 is a toothbrush, and Element 4 is a toothbrush body. This is lateral view of fore-end of the toothbrush (1) which represents both bristle part (11) of FIG. 21 and head (7) at the fore-end of the brush (4) for bristle part (11). Element 19 is bristles. Element 20 is the stopper as described above.

FIG. 23 is FIG. 22's basal view. Element 10 is boards, Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 20 is the aforementioned stopper, Element 19 is rooted brushes, and Element 14 represents female part (14) in the board and male part (17) in the toothbrush body (4) as a shaking prevention device when bristle part (11) is attached to toothbrush body (4).

FIG. 24 is FIG. 4's A-A′ line cross-sectional view. Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 10 is a board, Element 11 is a bristle part, Element 19 is bristles and Element 20 is a stopper. Elements 12, 14 are female parts (12, 14) which have “<” shaped inside (21, 22) of the toothbrush body (4). Elements 14, 17 are male parts which have “<” shaped lateral (23, 24) to bristle part (11).

This implementation example is toothbrush (1) as stated above, and the stopper (20) at bristle part (11) is designed to protrude from the bottom of the head (7) when the bristle part (11) is attached to the head (7) of the toothbrush body (4).

From below, example 5 of the invention is shown by FIGS. 25 to 30.

FIG. 25 is a plane figure of toothbrush body (4) of toothbrush (1) which has installation head (7) at the fore-end part. Fore-end inner lateral surfaces (21, 22) of toothbrush body (4) are head (7) which is “<” shaped to admit the bristle part (11) in FIG. 3 which has “<” shaped both right and left lateral male parts (15, 16, 17). Both sides of head (7) and toothbrush body (11) have female and male parts (14, 17) to prevent the fore-end of the toothbrush from shaking during brushing with the toothbrush (1).

FIG. 26 is the plane figure of bristle part (11) with board (10) which is attached to the head (7). Elements 23, 24 are both left and right lateral surfaces. Element 17 is male part of bristle part (11) for shaking prevention when assembled in female part (14), in FIG. 1.

Element 20 is the stopper for preventing dropping when attached to the head (7).

In FIG. 27, Element 20 is the stopper for preventing dropping when the bristle part (11) is attached to the head (7) around the bottom of the board (10). Elements 15, 16, 17 of both lateral fore-end are “<” shaped male parts. Especially, Element 17 is the male part to prevent the fore-end of the bristle part from shaking laterally. Element 19 is rooted bristles. This is a lateral view of male parts (15, 16, 17) with the shaking prevention “<” shape on the bristle part (11).

In FIG. 28, Element 1 is a toothbrush, and Element 4 is a toothbrush body. This is lateral view of the fore-end of the toothbrush (1) which represents both bristle part (11) of FIG. 27 and head (7) at the fore-end of the brush (4) for bristle part (11). Element 19 is bristles. Element 20 is the stopper as described above.

FIG. 29 is FIG. 28's basal view. Element 10 is a board, Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 20 is the aforementioned stopper, Element 19 is rooted brushes, and Element 14 represents female part(14) in board and male part (17) in toothbrush body (4) as a shaking prevention device when bristle part(11) is attached to toothbrush body (4).

FIG. 30 is FIG. 4's A-A′ line cross-sectional view. Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 10 is a board, Element 11 is a bristle part, Element 19 is bristles and Element 20 is a stopper. Elements 12, 14 are female parts (12, 14) which have “<” shaped inside (21, 22) of the toothbrush body (4). Element 14, 17 are male parts which have “<” shaped lateral (23, 24) to bristle part (11).

This implementation example is the toothbrush (1) as described above, the bottom of the bristle part (11) and the base of the toothbrush body (4) fit in the same plane, when the bristle part (11) is assembled to the head (7) of the toothbrush body (4).

As described below, the sixth example of the invention is shown by FIGS. 31 to 36.

FIG. 31 is a plane figure of toothbrush body (4) of toothbrush (1) which has installation head (7) at the fore-end part. Fore-end inner lateral surfaces (21, 22) of toothbrush body (4) are head (7) which is “<” shaped to admit the bristle part (11) in FIG. 3 which has “<” shaped both right and left lateral male parts (15, 16, 17). Both sides of head (7) and toothbrush body (11) have female and male parts (14, 17) to prevent the fore-end of the toothbrush from shaking during brushing with the toothbrush (1).

FIG. 32 is the plane figure of bristle part (11) with board (10) which is attached to the head (7). Element 23, 24 are both left and right lateral surfaces. Element 17 is male part of bristle part (11) for preventing shaking when attached to female part (14), in FIG. 1.

Element 20 is the stopper for preventing dropping when assembled to the head (7).

In FIG. 33, Element 20 is the stopper for preventing dropping when the bristle part (11) is attached to the head (7) around the bottom of the board (10). Elements 15, 16, 17 of both lateral fore-ends are “<” shaped male parts. Especially, Element 17 is the male part to prevent the fore-end of the bristle part from shaking laterally. Element 19 is rooted bristles. This is a lateral view of male parts (15, 16, 17) with the shaking prevention “<” shape on the bristle part (11).

In FIG. 34, Element 1 is a toothbrush, and Element 4 is a toothbrush body. This is lateral view of fore-end of the toothbrush (1) which represents both bristle part (11) of FIG. 33 and head (7) at the fore-end of the brush (4) for bristle part (11). Element 19 is bristles. Element 20 is the stopper as described above.

FIG. 35 is FIG. 34's basal view. Element 10 is a board, Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 20 is the aforementioned stopper, Element 19 is rooted brushes, and Element 14 represents female part (14) in board and male part (17) in toothbrush body (4) as a shaking prevention device when bristle part(11) is attached to toothbrush body (4).

FIG. 36 is FIG. 4's A-A′ line cross-sectional view. Element 1 is a toothbrush, and Element 4 is a toothbrush body. Element 10 is a board, Element 11 is a bristle part, Element 19 is bristles and Element 20 is a stopper. Elements 12, 14 are female parts (12, 14) which have “<” shaped inside (21, 22) of the toothbrush body (4). Element 14, 17 are male parts which have “<” shaped lateral (23, 24) to bristle part (11).

This implementation example is the toothbrush (1) as described above, formed to be in the same level between the male part (14, 17) of the bristle part (11) and the base of the toothbrush body (4), when the bristle part (11) is attached to the head (7) of the toothbrush body (4).

As described below, the invention's seventh example is shown by FIGS. 37 to 52.

FIG. 37 is a flat plane figure of the toothbrush body (5) with the head (7) at the fore-end of the toothbrush (2). Both right and left lateral male parts (15, 16, 17) at the inner lateral surfaces (21, 22) of the fore-end of the toothbrush body (5) are convex.

FIG. 38 is FIG. 37's basal view of the FIG. 37. FIG. 31 is a plane figure of toothbrush body (5) of toothbrush (2) which has installation head (7) at the fore-end part. Fore-end inner lateral surfaces (21, 22) of toothbrush body (4) are the head (7) which has curved male parts (15, 16, 17) at both right and left lateral surfaces. Both sides of head (7) and toothbrush body (11) have female and male parts (14, 17) to prevent the fore-end of the toothbrush from shaking during brushing with the toothbrush (1).

FIG. 39 is a plane figure of bristle part (11) in FIG. 3. Elements 23, 24 are both left and right lateral surfaces. Element 17 is a male part of bristle part (11) for preventing shaking when attached to female part (14), in FIG. 1.

Element 20 is the stopper for preventing dropping when attached to the head (7).

FIG. 40 is a basal view of FIG. 39. Element 10 is a board, Element 11 is a bristle part. Element 20 is a detach preventing stopper when attached to the head (8) in FIG. 37. Element 19 is rooted bristles. Element 17 is male part (17) to prevent the fore-end of the toothbrush (2) from shaking laterally, when the bristle part is attached to the head (8) from the basal view direction of FIG. 38.

FIG. 41 is lateral view of bristle part (11) which is attached to the head (8) of FIG. 37. The bristle part has a detach preventing stopper (20) at the base of the board (10), curved male parts (15, 16, 17) at both lateral surfaces of enrooted (19) bristle part (11), and the step (18a) at the upper portion of male part (16) not to protrude from the upper portion of toothbrush body (5).

FIG. 42 is C-C′ line cross-sectional view with FIG. 41 assembled to FIG. 37. Element 10 is a board, and Element 11 is a bristle part. The bristle part is attached to head (8) for bristle part (11) which is at the fore-end of toothbrush body (5) of toothbrush (2). Elements 12, 14 are female parts, Element 15, 17 are male parts, and Element 19 is bristles. The assembled stopper (20) base in the bristle part makes the same plane with the base of toothbrush.

FIG. 43 is lateral view of bristle part (11) which is attached to the head (8) of FIG. 37. The bristle part has a detach preventing stopper (20) at the base of the board (10), curved male parts (15, 16, 17) at both lateral surfaces of enrooted (19) bristle part (11), and the step (18a) at the upper portion of male part (16) not to protrude from the upper portion of toothbrush body (5).

FIG. 44 is a C-C′ line cross-sectional view with FIG. 41 assembled to FIG. 37. Element 10 is a board, and Element 11 is a bristle part. The bristle part is attached to head (8) for bristle part (11) which is at the fore-end of toothbrush body (5) of toothbrush (2). Elements 12, 14 are female parts, Elements 15, 17 are male parts, and Element 19 is bristles. The assembled stopper (20) base in bristle part (11) is designed to protrude from the base of the toothbrush body (5).

FIG. 45 is a lateral view of bristle part (11) which is attached to the head (8) of FIG. 37. The bristle part has a detach preventing stopper (20) at the base of the board (10), curved male parts (15, 16, 17) at both lateral surfaces of enrooted (19) bristle part (11), and the step (18a) at the upper portion of male part (16) not to protrude from the upper portion of toothbrush body (5).

FIG. 46 is a C-C′ line cross-sectional view with the FIG. 45 attached to FIG. 37. Element 10 is a board, and Element 11 is a bristle part. The bristle part is attached to head (8) for bristle part (11) which is at the fore-end of toothbrush body (5) of toothbrush (2). Elements 12, 14 are female parts, Elements 15, 17 are male parts, and Element 19 is bristles. The assembled stopper (20) base in bristle part is designed to protrude from the base of the toothbrush body (5).

The shapes of the lateral surfaces of the head (8) and bristle part (11) from FIG. 37 to FIG. 46 are curved.

FIG. 47 is a lateral view of the bristle part (11) which is attached to the head (8) of the FIG. 37. The bristle part has a detach preventing stopper (20) at the base of the board (10), “<” shaped male parts (15, 16, 17) at both lateral surfaces of enrooted (19) bristle part (11), and the step (18a) at the upper portion of male part (16) not to protrude from the upper portion of toothbrush body (5).

FIG. 48 is a C-C′ line cross-sectional view with FIG. 47 attached to FIG. 37. Element 10 is a board, and Element 11 is a bristle part. The bristle part is attached to head (8) for bristle part (11) which is at the fore-end of toothbrush body (5) of toothbrush (2). Elements 12, 14 are female parts, and Elements 15, 17 are male parts. And they all are “<” shape. Element 19 is rooted bristles. The assembled stopper (20) base in bristle part (11) protrudes from the base of the toothbrush body (5).

FIG. 49 is a lateral view of the bristle part (11) which is attached to the head (8) of the FIG. 37. The bristle part has a detach preventing stopper (20) at the base of the board (10), “<” shaped male parts (15, 16, 17) at both lateral surfaces of enrooted (19) bristle part (11), and the step (18a) at the upper portion of male part (16) not to protrude from the upper portion of toothbrush body (5).

FIG. 50 is a C-C′ line cross-sectional view with FIG. 47 assembled to FIG. 37. Element 10 is a board, and Element 11 is a bristle part. The bristle part is attached to head (8) for bristle part (11) which is at the fore-end of toothbrush body (5) of toothbrush (2). Elements 12, 14 are female parts, and Elements 15, 17 are male parts. And they all are “<” shape. Element 19 is rooted bristles. The assembled stopper (20) base in bristle part (11) protrudes from the base of the toothbrush body (5).

FIG. 51 is a lateral view of the bristle part (11) which is attached to the head (8) of the FIG. 37. The bristle part has a detach preventing stopper (20) at the base of the board (10), “<” shaped male parts (15, 16, 17) at both lateral surfaces of enrooted (19) bristle part (11), and the step (18a) at the upper portion of male part (16) not to protrude from the upper portion of toothbrush body (5).

FIG. 52 is a C-C′ line cross-sectional view with FIG. 51 assembled to FIG. 37. Element 10 is a board, and Element 11 is a bristle part. The bristle part is attached to head (8) for bristle part (11) which is at the fore-end of toothbrush body (5) of toothbrush (2). Elements 12, 14 are female parts, and Elements 15, 17 are male parts. And they all are “<” shape. Element 19 is bristle enrooted. The assembled stopper (20) base in bristle part (11) protrudes from the base of the toothbrush body (5).

The lateral surfaces of the head (8) and bristle part (11) from FIGS. 48 to 52 are “<” shaped.

As described below, the eighth of the invention is shown by FIGS. 53 to 68.

FIG. 53 is a toothbrush (3), and Element 6 is a toothbrush body. It is the plane figure with the male part (16) at the head (9), for the bristle part, in the fore-end of the brush body (6). Elements 21, 22 are lateral surfaces of the head (9).

FIG. 54 is a basal view of FIG. 53 with FIG. 57 attached. Element 10 is a board, Element 11 is a bristle part, Element 20 is a stopper, and Element 19 is rooted bristles. Elements 13 and 16 are female and male parts for preventing shaking of toothbrush (3).

FIG. 55 is a plane figure of bristle part (11). Elements 23, 24 are curved lateral surfaces, Element 10 is a board, Element 20 is a stopper and Element 13 is a female part.

FIG. 56 is a basal view of FIG. 55. Element 13 is a shake-preventing female part, Element 10 is a board, Element 11 is a bristle part, Element 20 is a stopper, and Element 19 is rooted bristles.

FIG. 57 is a lateral view of bristle part (11) which is attached to the head (9) in FIG. 53. Element 10 is a board, Element 11 is a bristle part, Elements 15, 16, are curved male parts, and Element 20 is a detach preventing stopper. Element 19 is rooted bristles.

FIG. 58 is a D-D′ line cross-sectional view with bristle part (11) of FIG. 57 attached to the head (9) of FIG. 53. Element 3 is a toothbrush, Element 6 is a toothbrush body, Element 10 is a board, Element 11 is a bristle part, Element 20 is a stopper, Element 19 is bristles, and Elements 12, 15 and 13, 16 are curved female and male parts.

FIG. 59 is a lateral view of bristle part (11) which is attached to the head (9) in FIG. 53. Element 10 is a board, Element 11 is a bristle part, Elements 15, 16, are curved male parts, and Element 20 is a detach preventing stopper. Element 19 is rooted bristles.

FIG. 60 is a D-D′ line cross-sectional view with bristle part (11) of FIG. 59 attached to the head (9) of FIG. 53. Element 3 is a toothbrush, Element 6 is a toothbrush body, Element 10 is a board, Element 11 is a bristle part, Element 20 is a stopper, Element 19 is bristles, and Elements 12, 15 and 13, 16 are curved female and male parts.

FIG. 61 is a lateral view of bristle part (11) which is attached to the head (9) in FIG. 53. Element 10 is a board, Element 11 is a bristle part, Elements 15, 16, are curved male parts, and Element 20 is a detach preventing stopper. Element 19 is rooted bristles.

FIG. 62 is a D-D′ line cross-sectional view with bristle part (11) of FIG. 61 attached to the head (9) of FIG. 53. Element 3 is a toothbrush, Element 6 is a toothbrush body, Element 10 is a board, Element 11 is a bristle part, Element 20 is a stopper, Element 19 is bristles, and Elements 12, 15 and 13, 16 are curved female and male parts.

FIG. 63 is a lateral view of bristle part (11) which is attached to the head (9) in FIG. 53. There is a detach preventing stopper (13) when attached to the head (9), and “<” shaped male parts (15, 16) on both lateral surfaces at the base of board (10). Element 19 is bristles.

FIG. 64 is a D-D′ line cross-sectional view with bristle part (11) of FIG. 57 attached to the head (9) of the FIG. 53. Element 6 is a toothbrush body of toothbrush (3), Element 10 is a board, and Element 11 is a bristle part. The female parts (12, 13) of the inner lateral surfaces of toothbrush boy (6) are concave, and the male parts (15, 16) of the lateral surfaces of the fore-end of the bristle part (11) have the shape of a curve. Element 20 is a detach preventing stopper where the bristle part (11) is attached to the head (9) as described above. Element 19 is bristles.

FIG. 65 is a lateral view of bristle part (11) which is attached to the head (9) in FIG.

53. There is a detach preventing stopper (13) when attached to the head (9), and “<” shaped male parts (15, 16) on both lateral surfaces at the base of board (10). Element 19 is bristles.

FIG. 66 is a D-D′ line cross-sectional view with bristle part (11) of FIG. 57 attached to the head (9) of the FIG. 53. Element 6 is a toothbrush body of toothbrush (3), Element 10 is a board, and Element 11 is a bristle part. The female parts (12, 13) of the inner lateral surfaces of toothbrush boy (6) are concave, and the male parts (15, 16) of the lateral surfaces of the fore-end of the bristle part (11) have the shape of a curve. Element 20 is a detach preventing stopper where the bristle part (11) is attached to the head (9) as described above. Element 19 is bristles.

FIG. 67 is a lateral view of bristle part (11) which is attached to the head (9) in FIG. 53. There is a detach preventing stopper (13) when attached to the head (9), and “<” shaped male parts (15, 16) on both lateral surfaces at the base of board (10). Element 19 is bristles.

FIG. 68 is a D-D′ line cross-sectional view with bristle part (11) of FIG. 57 attached to the head (9) of the FIG. 53. Element 6 is a toothbrush body of toothbrush (3), Element 10 is a board, and Element 11 is a bristle part. The female parts (12, 13) of the inner lateral surfaces of toothbrush boy (6) are concave, and the male parts (15, 16) of the lateral surfaces of the fore-end of the bristle part (11) have the shape of a curve. Element 20 is a detach preventing stopper where the bristle part (11) is attached to the head (9) as described above. Element 19 is bristles.

From FIG. 53 to FIG. 62, inner surfaces of head (9) and fore-end lateral surfaces of bristle part (11) are curved. And from FIGS. 63 to 68, “<” shaped.

FIG. 69 is a B-B′ line cross-sectional view of FIGS. 4, 16, 22, and 36. Element 10 is a board, Element 11 is a bristle part, Elements 21, 22 are lateral surfaces of head, and Element 7, 8, 9 are installation heads.

As both the inner lateral surfaces of the head (32) for the bristle part (33) prepared at the fore-end of the toothbrush body (31) of the conventional toothbrush (30) and the fore-end lateral surfaces of the bristle part (33) are curved or “<” shaped in FIG. 70, when the toothbrush (30) in FIG. 70 is used as described above, the fore-end head portion at the toothbrush body for bristle part (33) shakes laterally.

REFERENCE NUMERALS

1, 2, 3, 30: toothbrush

4, 5, 6, 31: toothbrush body

7, 8, 9, 32: head

10: board

11, 33: bristle part

12, 13, 14, 34: female part

15, 16, 17, 35: male part

18, 18a: step

19: bristles

20: stopper

21, 22, 23, 24: lateral surface

36: points

A-A′, B-B′: direction

Claims

1. A toothbrush comprising: a toothbrush body having a fore-end;a head having a circular female part or male part and being located at the fore-end of the toothbrush body; anda replaceable bristle part having bristles installed at a board with a circular female part or male part,the circular female part or male part of the board being attached to the circular male part or female part of the head by mutual elastic deformation, the circular female part or male part of the head and the circular female part or male part of the board being aligned with the toothbrush body.