TWI793535B - toothbrush - Google Patents

Abstract

The purpose of the present invention is to provide a toothbrush with high interest. The toothbrush 1 of the present invention has: a main body part 2, which includes a grip part 4 held by fingers and a brush part 5 abutting on the teeth; ; and the accessory parts include: the first part 10F, which expresses the first image; and the second part 10R, which expresses a second image different from the first image; and is set as follows: the toothbrush in the state where the brush part faces the first direction In the first use state, only one of the first part or the second part can be seen, and in the second use state of the toothbrush in which the brush part faces the second direction opposite to the first direction, only the first part can be seen. or the other of the second part.

Description

toothbrush

The present invention relates to a toothbrush.

Conventionally, there has been a toothbrush configured in a form associated with a human body or an animal, and various characters. Such a toothbrush is especially proposed for children or infants, for example, the toothbrush of Patent Document 1 is proposed.

The toothbrush described in Patent Document 1 is constituted as a toothbrush set having an elongated toothbrush body and a longitudinally separated cover. The toothbrush handle has a grip part corresponding to the main body part and two front feet of the giraffe, and two suction cup parts corresponding to the two rear feet of the giraffe. The cover is configured to cover the brush portion with a front half and a back half corresponding to the face and the back of the head of a giraffe. [Prior Art Literature] [Patent Document]

[Patent Document 1] Utility Model No. 3162247

[Problem to be solved by the invention]

As disclosed in Patent Document 1, this kind of toothbrush is a structure that takes time and effort to make children or infants want to brush their teeth. However, because the toothbrush itself has a minimalist structure with a hand-held grip and a brush that can be placed in the mouth, there is a problem of being tired of specifying the person as in Patent Document 1. According to this situation, the current situation is to expect a toothbrush with high interest such as making children or young children interested in brushing their teeth, so that they will not get bored and consciously do not brush their teeth.

The purpose of the present invention is to provide a toothbrush with high interest. [Technical means to solve the problem]

The toothbrush of the present invention is provided with: a main body part, which includes a grip part held by fingers and a brush part abutting against the teeth; The parts include: the first part, which expresses the first image; and the second part, which expresses the second image different from the first image; and is set as follows: the first use state of the toothbrush in the state where the above-mentioned brush part faces the first direction Next, if only one of the above-mentioned first part or the above-mentioned second part is visible, only the above-mentioned first part is visible in the second use state of the toothbrush in which the above-mentioned brush part faces the second direction opposite to the above-mentioned first direction. Or the other one of the second part above. [Effect of Invention]

According to the present invention, a highly interesting toothbrush can be provided.

Hereinafter, a toothbrush which is an embodiment of the present invention will be described with reference to FIGS. 1 to 6 . FIG. 1 is a side view of a toothbrush 1 . Fig. 2 is a front view of the toothbrush from the front, and Fig. 3 is a rear view of the toothbrush from the rear side. In addition, in the following description, regarding the direction of the toothbrush 1, the side on which the hair transplant 5a is provided is called the front side (front side), and the opposite side is called the back side (back side), and the front side is perpendicular to the back side and is automatically The side on which the toothbrush is viewed sideways (viewed from the side in such a way that the length of the toothbrush is visible) is called the lateral side.

Toothbrush 1 is as shown in Figure 1, if its constitution roughly distinguishes, then by the main body part 2 that comprises the grip part 4 that is grasped with fingers and the brush part 5 that abuts against tooth, and is arranged on the grip part with respect to The installation part 3 of 4 can be loaded and disassembled, for example, an accessory part 10 that imitates a figure of a doll form. In addition, details of the accessory part 10 will be described later, but the convex part 3t provided on the mounting part 3 of the grip part 4 is fitted and connected to the concave part 8 . In addition, the accessory parts 10 have, for example, a form imitating a person including the head 10H and the main body 10B. And, externally, it has a first part 10F representing a first image of the front of the person, and a second part 10R representing a second image of the rear of the person different from the first image.

As shown in Figures 1 to 3, the grip part 4 has a handle 4a on the side opposite to the brush part 5 (left side in the figure) for gripping, a neck 4b on the side of the brush part 5, and when viewed from the front. Between the neck 4b and the handle 4a, there is a large diameter part with a larger width. In this large diameter part, the 1st locking part 11 (11a, 11b) and the 2nd locking part 12 (12a, 12b) are formed. In more detail, the first locking portion 11 (11a, 11b) has, for example, a circular shape (refer to Fig. 2 and Fig. 3 ) whose width is larger than that of other parts of the grip portion 4, so that the thumb can be placed Reverse the position roughly 180 degrees in the front and back sides.

The second buckle part 12 (12a, 12b) is in the vicinity of the first buckle part 11, that is, the left and right side surfaces intersecting the surface on which the first buckle part 11 (11a, 11b) is formed (refer to Fig. 2 and Fig. 3) Formed by a pair of curved surfaces protruding away from the axis 4CL of the grip portion 4 . This 2nd locking part 12 (12a, 12b) is what is called from a side view (refer FIG. 1), and is arrange|positioned between the 1st locking part 11 structure.

In addition, different marks 21 and 22 are provided on the surfaces of the first locking parts 11 . For example, on the front side, a mark 21 drawn with a radial line is provided on the back side with respect to a circular mark surrounding the center, and a mark 22 drawn in a star shape is provided. The marks 21 and 22 indicating the front and back may be printed, or may be formed, for example, as a convex surface (see FIG. 4 ) or a concave surface. Moreover, the some protrusion 12p is provided in the 2nd locking part 12 (12a, 12b). That is, the surface of the 2nd locking part 12 (12a, 12b) is a concave-convex shape.

Fig. 4 is an enlarged sectional view of a portion along line A-A of Fig. 2 . As shown in FIG. 4 , the cross-sectional shape of the first locking portion 11 is a concave shape that is concave toward the axis 4CL side of the grip portion 4 . Moreover, the 1st locking part 11 inclines by the inclination angle ((theta)) which deviates from the axis|shaft 4CL as it approaches the brush part 5 side, for example.

FIG. 5 is an exploded perspective view showing the disassembled state of the grip portion 4 and the accessory part 10 . As shown in FIG. 5 , the accessory part 10 has a recessed part 8 that fits into the convex part 3t of the mounting part 3 . In detail, the concave portion 8 is provided with a first concave portion 8c on the contact surface 10fs at the lower end side of the accessory part 10 (upper, lower, lower end side of the person), and a second concave portion 8d at the front end side of the head. And these two recessed parts 8c, 8d are connected by the through-hole 8h. Moreover, the shape of the through-hole 8h is such that the opening cross-sectional shape is the same from the first concave portion 8c to the above-mentioned second concave portion 8d.

Moreover, the cross-sectional shape of both recessed part 8c, 8d is a substantially semicircular shape provided with the concave side flat surface 8g whose one end side is flat, for example. On the other hand, the cross-sectional shape of the convex portion 3t is a substantially semicircular shape having a convex-side flat surface 3g whose one end side is flat. Also, the concave side flat surface 8g is formed to coincide with the first part 10F expressing the first image of the front part of the person, for example.

On the other hand, in the grip portion 4 , the convex-side flat surface 3 g is provided in the same direction as the front side of the main body portion 2 . Therefore, the state of installing the accessory part 10 on the main body 2, that is, the state of fitting the first concave portion 8c and the convex portion 3t, can only be performed when the person's face side, that is, the first part 10F reaches the front side of the main body 2. Install. Also, as mentioned above, the first locking parts 11 (11a, 11b) are arranged on both sides of the front and back of the main body part 2, so they correspond to the front and back of the person.

In this way, the first part 10F of the front part 10F of the accessory part 10 and the second part 10R of the rear part are associated with one side (front side) and the other side (back side) of the grip part 4 on which the first locking part 11 is formed. Install. When using the toothbrush 1, for example, when the brush part 5 is facing upward in the first direction as the first use state of the toothbrush, only the first part 10F can be seen for the person brushing his teeth. And, conversely, when the state in which the brush portion 5 faces downward in the second direction is used as the second use state of the toothbrush, only the second portion 10R is visible to the person who brushes his teeth.

In addition, the corresponding relationship between the first use state of the toothbrush and the first direction and the second direction in the second use state of the toothbrush here is when the installation direction of the accessory part 10 relative to the grip part 4 is reversed. , becomes the opposite. That is, if the direction of the fitting structure is reversed, then in the second use state of the toothbrush with the brush portion 5 facing down, the first part 10F of the character faces upward, and in the first use state of the opposite toothbrush, the second position of the character faces upward. Site 10R faces up.

Also, the first use state of the toothbrush and the second use state of the toothbrush here are not limited to the up and down directions of the brush part 5, and can also be set as the left and right lateral states in which the brush part 5 faces sideways.

Moreover, as shown in FIG. 5, the attachment part 10 is formed in substantially circular cross-sectional shape centering on the axis line 10CL which penetrates the head part 10H and the main body part 10B. That is, the outer surface shape is substantially circular. In addition, the outer diameter of the head 10H and the main body 10B can also be the same, but the outer diameter of the head 10H is preferably larger.

Also, the contact surface 10fs of the attachment 10 is formed as a flat surface substantially perpendicular to the axis line 10CL. On the other hand, the contact surface 4fs on the side of the grip portion 4 is also formed as a flat surface substantially perpendicular to the axis 4CL. Therefore, the adhesion between the accessory part 10 and the grip part 4 in the state where the two contact surfaces 10fs and 4fs are in contact is better. As a result, the outer peripheral surface 4s of the grip part 4 and the outer peripheral surface 10s of the accessory part 10 are constituted as substantially continuous curves so that the outer peripheral surface looks like a whole (see FIGS. 1 to 3 ).

In this manner, the attachment 10 is configured such that the main body portion 10B forms a part of the grip portion 4 in a state attached to the attachment portion 3 . Thereby, when holding the toothbrush 1, even if holding the main body part 10B and the grip part 4 at the same time, it can be used without a sense of incongruity.

In addition, the attachment part 10 has a maximum width D1 in which the head part 10H is the maximum dimension, as shown in FIG. 2 , for example, when viewed from the front. The maximum width D1 of the head portion 10H is configured to be larger than, for example, the maximum width D2 of the grip portion, which is the width of the first locking portion 11 provided on the grip portion 4 and described later. In this way, by making the head 10H larger, the head 10H can be used as a grip point when brushing teeth or when holding the toothbrush 1 .

Fig. 6 is a side view showing an example of a state where the toothbrush is made to stand on its own. Since the head 10H of the accessory part 10 is also provided with the second concave portion 8d, the main body 2 can be connected to the head 10H. In addition, when attaching the accessory part 10 to the grip part 4 from the head part 10H, as shown in FIG. 6, the toothbrush 1 can stand on its own.

As described above, according to the toothbrush 1 of the present embodiment, the attachment 10 can be detachably provided on the grip portion 4 of the toothbrush 1, thereby detachable plural kinds of attachments 10, and can realize the toothbrush 1 rich in variety. Moreover, the first part 10F (front side) and the second part 10R (rear side) with different images are provided on the accessory part 10, and the teeth can be brushed while selectively Look at the first part 10F and the second part 10R. In this way, the way of holding the toothbrush 1 can be known from the direction of the character of the accessory part 10 . Also, the first part 10F (front side) or the second part 10R (back side) can be fun during brushing teeth. As a result, a highly interesting toothbrush can be provided.

Also, in the toothbrush 1 of this embodiment, the attachment part 10 has a fitting shape that can be attached to the attachment part 3 only in a specific direction, thereby specifying the direction of the attachment part 10 relative to the grip part 4 . Therefore, the directions of the first part 10F and the second part 10R of the attachment part 10 in the state of use of the toothbrush 1 can be specified and associated. As a result, the holding direction of the toothbrush 1 can be judged immediately with the direction of the accessory part 10 (the front and back direction of the person).

Also, in the toothbrush 1 of the present embodiment, the outer peripheral surface 4s of the grip part 4 and the outer peripheral surface 10s of the attachment part 10 are configured to be connected in a state where the mounting part 3 and the contact surfaces 4fs and 10fs of the attachment part 10 are in contact with each other. . Thereby, the appearance continuity between the grip part 4 and the accessory part 10 can be improved, and the toothbrush 1 in which the accessory part 10 and the main body part 2 have a sense of unity can be provided.

Also, as described above, according to the structure that improves the feel of the grip part 4 and the attachment part 10, the attachment part 10 can be used as a part of the grip part 4. Therefore, for example, by enlarging (lengthening) the attachment part 10, the grip part 4 can be reduced, and the size of the toothbrush 1 can be achieved.

Also, in the toothbrush 1 of this embodiment, by making the maximum width D1 of the head 10H larger than the maximum width D2 of the grip 4, in the state where the attachment 10 is attached, one end of the grip 4 The enlarged side diameter is easy to hold, and the toothbrush 1 is restrained from falling.

In addition, in the toothbrush 1 of the present embodiment, the cross-sectional shape of the attachment 10 centered on the axis 10CL penetrating the up-and-down direction of the person is formed in a substantially circular shape, whereby the outer peripheral surface 10s is substantially circular. Thereby, when the accessory part 10 is horizontally placed on the mounting surface, it can be rolled and played. In addition, for example, when the outer diameter of the main body 10B is made smaller than that of the head 10H, not only rolling but also revolving while rotating (such as setting the direction of the axis 10CL as rotating Radius action), can improve the fun.

Also, in the toothbrush 1 of the present embodiment, by providing the attachment 10 with the contact surface 10fs constituted by a flat surface substantially perpendicular to the axis 10CL, it can be mounted on the mounting surface independently, and also It can be appreciated as a decoration.

Furthermore, by making the contact surface 10fs flat, the toothbrush 1 can be placed on its own in a forward-inclining manner (see FIG. 6 ), but the head 10H is also provided with the second concave portion 8d, so that the person's Place upside down. That is, by forming a dummy flat surface in the second concave portion 8d opened in the head portion 10H, this can be used as a mounting surface.

Also, in the toothbrush 1 of the present embodiment, the through hole 8h communicating with the recess 8 is formed in the accessory part 10, so the recess 8 is a structure with good air permeability, and it is easy to clean and more hygienic.

Also, in this embodiment, the through-hole 8h is formed to have the same opening cross-sectional shape as the concave portion 8, whereby the length of the convex portion 3t can be extended to the entire length of the accessory part 10 at the maximum. As a result, the engagement depth of the concave-convex engagement can be made deep, and the accessory part 10 can be securely engaged. Furthermore, the concave-convex fitting only needs to match the cross-sectional shape, so the fitting depth of the convex portion 3t is not limited, and the toothbrush 1 that can be easily installed by various characters and has high versatility can be provided.

Also, in the toothbrush 1 of the present embodiment, the concave portion 8 has the first concave portion 8c provided on the main body portion 10B and the second concave portion 8d provided on the head portion 10H, so it can be connected to the main body portion 2 from any direction up and down the person. , and can enjoy the fun of changing the shape of the character installation.

Also, in the toothbrush 1 of the present embodiment, the gripping portion 4 is provided with the first buckle 11 with a side width larger than that of other parts, so that the first buckle can be pressed against the fingertips such as the thumb when brushing teeth. Use with stop 11. Thereby, even children or infants with relatively small strength can easily apply force to the toothbrush 1, thereby improving usability.

Also, the first buckle portion 11 is formed on both sides of the front and back of the grip portion 4 (180-degree reverse position), for example, the first buckle portion 11 can be used in any direction up and down the toothbrush 1. Press against the fingers other than the thumb. Moreover, it is also possible to hold the thumb and other fingers against the first locking portion 11 at the same time, which can significantly diversify the usage forms of the toothbrush 1 .

Also, in the toothbrush 1 of the present embodiment, because the first locking part 11 is in a concave shape, it is integrated into the shape of the front end of the fingertip to make it easier to hold. Also, the first locking portion 11 is inclined in such a way that the side of the first locking portion 11 is away from the axis 4CL of the grip portion 4 as it approaches the brush portion 5, that is, the surface of the first locking portion 11 faces toward one end side of the grip portion 4 (the brush portion 5 The opposite side) is inclined (inclination angle θ), so that it can be made to correspond to the curved shape of the front end of the thumb of the hand holding the grip part 4 . As a result, force can be easily applied with fingertips.

Also, in the toothbrush 1 of the present embodiment, the accessory parts 10 are on the front side of the first part 10F (front side) and the second part 10R (back side) and the grip part 4 formed with the first locking part 11 Install in association with the direction corresponding to the back side. In this way, the first use state of the toothbrush and the second use state of the toothbrush can be associated with the direction of the first buckle part 11. For example, the use of the first buckle part 11 can be promoted in accordance with the direction of a person, and can be used as a tool for grasping the toothbrush. 1. Use the part of the method of use.

Also, in the toothbrush 1 of the present embodiment, different marks 21, 22 are attached on the surfaces of the first buckle parts 11 on the front and back, so that the first use state of the toothbrush and the second use state of the toothbrush can be compared with the first use state of the toothbrush. and so on mark 21, 22 to establish association. Furthermore, when the markings 21 and 22 are formed in a concavo-convex shape, the gripability of the fingertips can be improved, and the ease of holding can be improved.

Also, in the toothbrush 1 of the present embodiment, by being provided with the second buckle portion 12 of different shapes close to the first buckle portion 11, the options of the gripping method or the gripping method of the finger and hand can be increased, and the toothbrush can be widely used. The ground corresponds to the size of the hand.

Also, in the toothbrush 1 of the present embodiment, because the second buckle portion 12 is formed by the surface intersecting the face of the first buckle portion 11 between the first buckle portion 11 and the face of the first buckle portion 11 when the toothbrush 1 is viewed from the side, The lengthwise direction of the part 4 is also formed at approximately the same position as the first buckle part 11, so the two buckle parts 11, 12 can be formed in a compact position, and can be easily held or held simultaneously by smaller fingertips. The two buckle parts 11 and 12 are exchanged.

Also, in the toothbrush 1 of the present embodiment, the second locking portion 12 is formed as a curved surface protruding away from the axis 4CL of the grip portion 4, so when the toothbrush 1 is used, for example, by pinching it with fingertips, , can reduce the contact surface with fingertips. As a result, it is easy to respond to the use form such as when the brush portion 5 is intended to be brought into light contact with the teeth.

Also, the second locking part 12 is a convex curved surface, so the contact surface with the fingertip becomes smaller, but by forming a protrusion 12p on the curved surface (refer to FIGS. When it is held lightly, the friction with the fingertips can also be increased, making it easy to hold.

As mentioned above, although one embodiment of this invention was described, this invention can be changed suitably within the range of the technical thought. For example, in the above embodiment, the cross-sectional shape of the convex part 3t and the concave part 8 of the mounting part 3 installed in a specific direction is set to have a fitting shape of a straight line part and an arc part, but the fitting shape is not limited to this Alternatively, a triangular shape or a rectangle may also be used. For example, in the case of a triangular shape, in the case of an equilateral triangle, the direction of the accessory part 10 can be selected from three directions. Also, in the case of a square and then a regular polygon, the direction of the number of its corners can be selected.

In addition, in the above-mentioned embodiment, the convex portion 3t is provided in the grip portion 4, and the concave portion 8 is provided in the accessory part 10, but the concave-convex relationship may be reversed. Also, the recessed portion 8 is configured to pass through the accessory part 10, but the recessed portion 8 may not communicate with the through hole 8h.

Also, in the above embodiment, the concave portion 8 is formed on the upper end side of the head 10H of the person and the lower end side of the main body portion 10B, but the concave portion 8 may be formed on the side surface of the person.

Also, in the above-mentioned embodiment, although the first locking portion 11 is provided on both sides of the front and back of the grip portion 4, the first locking portion 11 may also be on only one side. Also, the first locking portion 11 may not have a dimpled shape. Also, in the above-mentioned embodiment, it is configured that the first buckle portion 11 is arranged at a position reversed 180 degrees on both sides of the front and back, but the front and back of the grip portion 4 may also be slightly inclined without being reversed by 180 degrees. The composition (the cross-sectional shape of the grip portion 4 is a distorted shape rather than a rectangle).

1: Toothbrush 2: Main body 3: Installation department 3g: Convex flat surface 3t: convex part 4: Grip 4a: handle 4b: Neck 4CL: the axis of the body 4fs: the contact surface of the grip 4s: Outer peripheral surface of the grip 5: brush part 5a: Flocking 8: Concave 8c: 1st concave part 8d: the second recess 8g: Concave side flat surface 8h: Through hole 10: Accessory parts 10B: Main body 10CL: axis of accessory parts 10F: Part 1 10fs: contact surface of accessory parts 10H: head 10R: Part 2 10s: Outer peripheral surface of accessory parts 11: The first buckle part 11a: The first buckle part 11b: The first buckle part 12: The second buckle part 12a: The second locking part 12b: The second buckle part 12p:Protrusion 21: mark 22: mark D1: the maximum width of the head D2: the maximum width of the grip θ: tilt angle

Fig. 1 is a side view of a toothbrush according to an embodiment of the present invention. Fig. 2 is a front view of the toothbrush shown in Fig. 1 viewed from the front. Fig. 3 is a rear view of the toothbrush shown in Fig. 1 viewed from the rear side. Fig. 4 is an enlarged cross-sectional view of a portion along line A-A shown in Fig. 2 . Fig. 5 is an exploded perspective view of an enlarged main part of the toothbrush shown in Fig. 1 . Fig. 6 is a side view showing an example of a state in which the toothbrush shown in Fig. 1 is made to stand on its own.

1: Toothbrush

2: Main body

3: Installation Department

3t: convex part

4: Grip

4a: handle

4b: Neck

4s: Outer peripheral surface of the grip

5: brush part

5a: Flocking

8: Concave

10: Accessory parts

10B: Main body

10F: Part 1

10H: head

10R: Part 2

10s: Outer peripheral surface of accessory parts

11: The first buckle part

11a: The first buckle part

11b: The first buckle part

12: The second buckle part

12a: The second locking part

12p:Protrusion

D1: the maximum width of the head

Claims (18)

A toothbrush, which comprises: a main body, which includes a grip portion held by fingers and a brush portion abutting against the teeth; and accessory parts, which are detachable relative to the mounting portion provided on the grip portion; and the above-mentioned The accessory parts include: the first part, which expresses the first image; and the second part, which expresses the second image different from the first image; and is set as follows: the first use of the toothbrush in the state where the brush part faces the first direction state, only one of the above-mentioned first part or the above-mentioned second part can be seen; in the second use state of the toothbrush in which the above-mentioned brush part faces the second direction opposite to the above-mentioned first direction, only the above-mentioned first part can be seen. 1 site or the other of the above 2 sites. The toothbrush according to claim 1, wherein the above-mentioned accessory part is formed in a fitting shape that can be mounted on the above-mentioned mounting part only in a specific direction. The toothbrush according to claim 1 or 2, wherein the outer peripheral surface of the grip part and the outer peripheral surface of the accessory part are configured to be connected in a state where the mounting part is in contact with the abutting surface of the accessory part. The toothbrush according to claim 1 or 2, wherein the above-mentioned accessory parts are in the form of imitating a character, and include a head and a main body; and are constituted as, In a state where the accessory part is mounted on the mounting part, the main body part forms a part of the grip part. The toothbrush according to claim 4, wherein the maximum width of the head is larger than the maximum width of the grip. The toothbrush according to claim 4, wherein the cross-sectional shape of the accessory part centered on the axis passing through the head and the main body is formed in a substantially circular shape. The toothbrush according to claim 1 or 2, wherein said accessory part has a flat surface substantially perpendicular to its axis. The toothbrush according to claim 1 or 2, wherein a through hole penetrating from one end side to the other end side is formed in the above-mentioned accessory part; and the protrusion provided on the above-mentioned mounting part can be fitted into the above-mentioned through-hole. The toothbrush according to claim 8, wherein the above-mentioned accessory part is in the form of imitating a person, and includes a head and a main body; The opening on the other end side of the main body is continuous in the same shape. Such as the toothbrush of claim item 9, wherein A flat surface substantially perpendicular to the axis of the accessory part is formed on the main body. The toothbrush according to claim 1 or 2, wherein a first buckle part having a side width larger than other parts of the above-mentioned grip part is provided on the above-mentioned grip part. The toothbrush according to claim 11, wherein the first locking part is formed on one side of the gripping part and the other side at a position reversed approximately 180 degrees from the one side. The toothbrush according to claim 11, wherein the first locking portion has a concave shape and is inclined so as to be away from the axis of the grip portion as it approaches the brush portion side. The toothbrush according to claim 12, wherein the accessory part is installed by associating the first part and the second part with one side and the other side of the grip part on which the first locking part is formed. The toothbrush according to claim 12, wherein different marks are attached to the surface of each of the above-mentioned first buckle parts. Such as the toothbrush of claim 11, wherein A second locking portion having a surface in a direction intersecting the first locking portion is provided near the first locking portion. The toothbrush according to claim 16, wherein the first locking part is formed on both sides of one side and the other side of the gripping part; the second locking part is formed between the first locking parts when the toothbrush is viewed from the side. The toothbrush according to claim 16, wherein the second locking portion is formed as a curved surface protruding away from the axis of the gripping portion.

Images