JP2018075269A - toothbrush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toothbrush which can control a brushing pressure and has flexible operability.SOLUTION: A toothbrush 1 includes: a head part 14 which is arranged on a tip end side and has a bristle bundle 13 implanted on an implanting surface 14a; a neck part 15 extended on a rear end side of the head part 14; and a handle part 16 extended on a rear end side, that is opposite of the head part 14, of the neck part 15. The handle part 16 has at least: a body part 16A continuing from the neck part 15; a branching part 16B which extends along the body part 16A, and where the other end side is connected to a terminal of the body part 16A while one end side is separated in a width direction of the body part 16A; and an elastic holding member 12 which integrally holds the body part 16A and the branching part 16B.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a toothbrush.

As a function of the toothbrush, it is important that it is easy to operate for brushing a desired portion, and that an excessive brushing pressure during brushing can be avoided.
Patent Document 1 describes a toothbrush capable of adjusting the inclination of the head part by providing a “pressing part” capable of adjusting the deformation of the flocked part by itself in the operation of the toothbrush.
Patent Document 2 describes a toothbrush that controls a brushing pressure by torsional deformation of a connecting portion by providing a connecting portion that connects the handle portion and the neck portion.

JP, 2006-64031, A Japanese Patent Laid-Open No. 10-215950

  In Patent Documents 1 and 2 described above, the neck portion is bent with respect to the handle portion by brushing by displacing the “connection portion” between the neck portion and the handle portion via the “pressing portion” and the “connecting portion”. It is a technology that controls pressure. Therefore, even in the case of an excessive operation pressure, the brushing pressure is controlled only by the above-described connection portion, and the displacement of the head portion with respect to the handle portion becomes large. When the displacement of the head part becomes larger than necessary, an appropriate brushing pressure cannot be obtained, and the operability may be unclear.

  One aspect of the present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a toothbrush that can control the brushing pressure on teeth and has flexible operability.

  The toothbrush according to an aspect of the present invention includes a head portion that is disposed on a front end side and a hair bundle is planted on a flocked surface, a neck portion that extends to a rear end side of the head portion, and the head of the neck portion. A handle portion extending to a rear end side opposite to the portion, the handle portion extending along the main body portion from the neck portion, and one end side of the main body portion At least a branch portion whose other end is connected to an end of the main body portion and an elastic holding member that integrally holds the main body portion and the branch portion. It is characterized by that.

  Moreover, the toothbrush of 1 aspect of this invention WHEREIN: The said elastic holding member is good also as a structure provided so that the clearance gap between the said main-body part and the said branch part may be filled up.

  Moreover, the toothbrush of 1 aspect of this invention WHEREIN: At least one part of the said main-body part and the said branch part is good also as a structure covered with the said elastic holding member.

  Further, in the toothbrush of one aspect of the present invention, in the width direction intersecting with the extending direction of the handle portion, the side surface of the main body portion and the inner surface of the branching portion facing the side surface are inclined with respect to each other. It is good also as the structure made into the inclined surface which goes to the width direction both sides as it goes to the said flocked surface side from the back side, and is mutually parallel.

  Moreover, the toothbrush of 1 aspect of this invention WHEREIN: The cross-sectional shape which cross | intersects the extension direction of the said handle | steering-wheel part is good also as a structure which is exhibiting the substantially triangular shape which makes the said flocked surface side the bottom face.

  Moreover, in the toothbrush of 1 aspect of this invention, in the state which has the said branch part in the width direction both sides of the said main-body part, respectively, and the said elastic holding member is not provided, each branch part goes to the said neck part side Accordingly, it may be configured to extend in a direction away from the main body.

  Moreover, the toothbrush of 1 aspect of this invention WHEREIN: The said elastic holding member is good also as a structure currently formed with resin softer than resin which forms the said main-body part and the said branch part.

  ADVANTAGE OF THE INVENTION According to this invention, the brushing pressure with respect to a tooth can be controlled and the toothbrush with flexible operativity can be provided.

(A) is a top view of the toothbrush 1, FIG.1 (b) is a side view of the toothbrush 1, FIG.1 (c) is sectional drawing which follows the AA line of Fig.1 (a). 2A is a plan view of the toothbrush main body 10A, FIG. 2B is a side view of the toothbrush main body 10A, and FIG. 2C is a cross-sectional view taken along line BB in FIG. (A) is sectional drawing which shows the state before grasping the handle part 16 of the toothbrush 1, FIG.3 (b) is sectional drawing which shows a state when the handle part 16 of the toothbrush 1 is grasped, FIG.3 (c). FIG. 3 is a cross-sectional view showing a state during brushing. (A) is a top view of the toothbrush 20, FIG.4 (b) is a side view of the toothbrush 20, FIG.4 (c) is sectional drawing which follows the AA line of Fig.4 (a). (A) is a top view of the toothbrush 30, (b) is a side view of the toothbrush 30, (c) is sectional drawing which follows the AA line of (a). (C) is sectional drawing which follows the DD line of (a). (D) is sectional drawing which follows the EE line of (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Each embodiment shown below shows one mode of the present invention, does not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in the following drawings, in order to make each component easy to see, the scale of the size may be varied depending on the component.

[First embodiment]
Hereinafter, the structure of the toothbrush of 1st Embodiment of this invention is demonstrated.
FIG. 1A is a plan view of the toothbrush 1. FIG. 1B is a side view of the toothbrush 1. FIG.1 (c) is sectional drawing which follows the AA line of Fig.1 (a). FIG. 2A is a plan view of the toothbrush body 10A. FIG. 2B is a side view of the toothbrush body 10A. FIG.2 (c) is sectional drawing which follows the BB line of Fig.2 (a).

  As shown in FIGS. 1A to 1C, a toothbrush 1 of the present embodiment includes a toothbrush body 10A constituting the framework of the toothbrush 1, an elastic holding member 12 that is softer than the toothbrush body 10A, and a plurality of bristles. It comprises a bundle 13 and consists of three main parts.

  Specifically, the toothbrush 1 is arranged at the front end of a hard toothbrush main body 10A, and a head portion 14 in which a plurality of hair bundles 13 of the bristles 13a are implanted, and a neck portion extended to the rear end side of the head portion 14. 15 and a handle portion 16 having an elastic holding member 12 that extends toward the rear end of the neck portion 15 (the end opposite to the end portion on the head portion 14 side) and is softer than the toothbrush body 10A, Is provided.

The toothbrush body 10A is integrally formed in a long shape as a whole, and is obtained, for example, by injection molding using a resin as a material.
Examples of the material of the toothbrush main body 10A include polypropylene resin (PP), polyacetal resin (POM), polystyrene resin (PS), polyethylene terephthalate resin (PET), polybutylene terephthalate resin (PBT), and acrylonitrile butadiene styrene resin (ABS). , Poreylate resin, polycarbonate resin, acrylonitrile styrene resin (AS), and the like.
The above resins may be used alone or in combination of two or more.
The length of 10A of toothbrush main bodies is not specifically limited, For example, you may be 100-200 mm.

  The head portion 14 has a flocked surface 14a on one side in the thickness direction (hereinafter referred to as the upper surface side). A plurality of flock holes 14b are formed on the flocked surface 14a, and a bundle of hairs 13a is planted in the flock hole 14b. In addition, illustration of the hair | bristle bundle 13 is abbreviate | omitted in Fig.1 (a).

  In the present embodiment, the rear end of the head portion 14 is arranged on the most rear end side when the distance from the outer edge of the flock hole 14b arranged on the most distal side to the tip of the head portion 14 is L1. It is defined at a position of a distance L1 from the outer edge of the flocking hole 14b to the rear end side. That is, as shown to Fig.1 (a), the head part 14 contains the range R which respectively left | separated about distance L1 from the outer edge of the flock hole 14b located in the both ends of a length direction. The position on the rear end side of the range R is a boundary between the head portion 14 and the neck portion 15.

The length of the head part 14 is not specifically limited, For example, 10-33 mm is preferable and 12-28 mm is more preferable. If it is more than the said lower limit, the area which implants the hair | bristle bundle 13 can fully be ensured, and if it is below the said upper limit, the operativity in an oral cavity can be improved more.
The width of the head portion 14, that is, the width in the direction parallel to the flocked surface 14a and perpendicular to the length direction of the handle portion 16 (hereinafter simply referred to as the width) is not particularly limited, and is preferably 5 to 16 mm, for example. 8 to 12 mm is more preferable.

The neck portion 15 extends in parallel with the flocked surface 14 a of the head portion 14.
The length of the neck part 15 is not specifically limited, For example, 35-55 mm is preferable and 40-50 mm is more preferable. The width | variety of the neck part 15 is not specifically limited, For example, 3.0-5.0 mm is preferable and 3.5-4.5 mm is more preferable.

Similarly to the neck portion 15, the handle portion 16 extends in parallel with the flocked surface 14 a of the head portion 14.
The handle portion 16 of this embodiment includes a main body portion 16A continuous from the neck portion 15, a pair of branch portions 16B and 16B provided on both sides in the width direction of the main body portion 16A, a main body portion 16A and a pair of branch portions 16B, And an elastic holding member 12 that integrally holds 16B. Due to the elastic holding member 12, each of the branch portions 16B, 16B and the main body portion 16A extend in a straight line parallel to each other.

  As shown in FIGS. 1A and 1B, the main body portion 16 </ b> A extends linearly from the neck portion 15 and has the same width as the neck portion 15. As shown in FIG. 1C, the main body portion 16A has a substantially triangular shape in which the cross-sectional shape intersecting the extending direction of the handle portion 16 has a surface 10a on the flocked surface 14a side as a bottom surface. For this reason, the side surfaces 16a and 16a on both sides in the width direction of the main body portion 16A are inclined surfaces extending in the width direction from the back surface 10b side to the front surface 10a side of the toothbrush main body 10A.

  The pair of branch portions 16B and 16B extend along the main body portion 16A, and the base portion (the other end) 16c on the other end side is at the end of the main body portion 16A with the distal end 16d side spaced apart in the width direction of the main body portion 16A. Each is connected. The pair of branch portions 16B and 16B are integrated with the main body portion 16A by the elastic holding member 12.

  As shown in FIG. 1C, each of the branch portions 16B and 16B has a substantially trapezoidal cross section in the width direction. The side surfaces 16b of the branch portions 16B and 16B are inclined surfaces that face the side surfaces 16a of the main body portion 16A and are inclined in the same inclination direction as the side surfaces 16a, and are parallel to each other. The inner surfaces of these branch portions 16B and 16B are inclined toward both sides in the width direction as they go from the back surface 10b side to the surface 10a side of the toothbrush main body 10A.

  The elastic holding member 12 is provided so as to fill the gaps S and S between the main body portion 16A and the branch portions 16B and 16B, and bonds the branch portions 16B and 16B to the main body portion 16A. The elastic holding members 12 and 12 disposed in the gaps S and S are substantially V-shaped in a cross section in the width direction.

  As the material of the elastic holding member 12, it is preferable to use a resin material that is softer than the resin material that forms the main body portion 16A and the branch portions 16B and 16B, and for example, a resin having a hardness of 40 to 80 is more preferable. The material of the elastic holding member 12 is selected in consideration of the adhesiveness with the toothbrush main body 10A in addition to the hardness condition. For example, when the toothbrush main body 10 </ b> A is made of a polypropylene resin, it is preferable to use a styrene elastomer resin as the elastic holding member 12.

  As shown in FIG. 2A, the toothbrush main body 10A according to the present embodiment has the branch portions 16B and 16B in the state before the elastic holding member 12 is arranged. It extends in the direction away from each. That is, each branch part 16B, 16B in the initial state without the elastic holding member 12 is inclined with respect to the extending direction of the main body part 16A, and the distal end 16d side is farthest from the main body part 16A.

  Since the toothbrush body 10A of the present embodiment is obtained by injection molding using a mold, the inclined surface (side surface 16a and side surface) functions as a taper taper on each of the body portion 16A and the branch portions 16B and 16B. By providing 16b), it is easy to remove from the mold during primary molding. Moreover, it is advantageous for mold release also in the point which the front-end | tips 16d and 16d side of branch part 16B and 16B each opened with respect to the main-body part 16A.

  In the present embodiment, the branch portions 16B and 16B are formed with a substantially constant thickness in the extending direction, but the thickness on the side of the base portion 16c connected to the main body portion 16A is partially thin. May be. When secondary molding is performed to provide the elastic holding member 12, it is easy to set the toothbrush body 10A to the secondary mold.

  The length of such a handle | steering-wheel part 16 is not specifically limited, For example, 80-130 mm is preferable and 90-120 mm is more preferable.

  FIG. 3A is a cross-sectional view showing a state before the handle portion 16 of the toothbrush 1 is gripped. FIG. 3B is a cross-sectional view showing a state when the handle portion 16 of the toothbrush 1 is gripped. FIG.3 (c) is sectional drawing which shows the state at the time of brushing.

  The toothbrush 1 of the present embodiment is configured such that when the handle portion 16 is gripped in use, a gripping force is applied from both sides in the width direction, and the shape of the handle portion 16 changes due to the flexibility of the elastic holding member 12.

  As shown in FIG. 3A, before using the toothbrush 1 (before grasping), the main body portion 16A of the handle portion 16 and the branch portions 16B and 16B constitute the same plane, and the toothbrush main body 10A Both the front surface 10a and the back surface 10b are flat surfaces.

  As shown in FIG. 3B, during use of the toothbrush 1, the body portion 16A of the handle portion 16 protrudes toward the surface 10a side with respect to the branch portions 16B and 16B on both sides by the gripping force. Deform. In the present embodiment, the main body portion 16A has a triangular cross-sectional shape in the width direction, and the branch portions 16B and 16B are side surfaces 16b and 16b inclined in parallel with the side surfaces 16a and 16a of the main body portion 16A. have. Therefore, when the branch portions 16B and 16B approach each other due to the gripping force, the main body portion 16A is displaced by the side surfaces 16a and 16a of the branch portions 16B and 16B so as to be pushed out toward the surface 10a. Thereby, it inclines to the flocked surface 14a side from the neck part 15 of the toothbrush 1 to the head part 14, and changes to the inclination which is easy to polish the back side of a back tooth.

  Further, by weakening the gripping force, the position of the main body portion 16A, that is, the position of the head portion 14 and the neck portion 15 can be returned to the original position.

  Since the toothbrush 1 forms a fulcrum through the flexible elastic holding member 12 filled in the gap S between the main body 16A and each of the branch parts 16B and 16B, the toothbrush 1 is displaced with the base part 16c serving as a connecting part as a base point. The displacement of the main body portion 16A is controlled via a fulcrum.

  As described above, according to the toothbrush 1 of the present embodiment, the main body of the handle portion 16 connected to the head portion 14 and the neck portion 15 in the handle portion 16 due to the flexibility imparted to the handle portion 16. The portion 16A is displaced with respect to the branch portions 16B and 16B, and an inclination toward the surface 10a can be given from the main body portion 16A to the neck portion 15 and the head portion 14 connected to the main body portion 16A. That is, by gripping the handle portion 16, it is possible to tilt the head portion 14 side together with the main body portion 16A, and it is easier to adjust the amount of bending than the configuration in which only the head portion 14 is bent.

  The inclination of the head portion 14 from the main body portion 16 </ b> A to the head portion 14 can be adjusted by a gripping force with respect to the handle portion 16. This is advantageous when brushing the inside or back side of a tooth that is difficult to brush and the back of the back tooth. Brushing becomes easy and the teeth can be cleaned well because the hair reaches the parts that have been difficult to polish.

  In addition, when the toothbrush 1 of the present embodiment is used, when a force in a direction perpendicular to the flocked surface 14a is applied to the head portion 14, a portion from the head portion 14 to the main body portion 16A is pushed back to the back surface 10b side. It becomes. At this time, if the displacement of the head portion 14 toward the back surface 10b side (displacement of the main body portion 16A with respect to the branching portion 16B) becomes large, the brushing pressure for the teeth cannot be sufficiently obtained, and the cleaning properties of the teeth are deteriorated. However, in the case of the toothbrush 1 of the present embodiment, the branch portions 16B and 16B and the main body portion 16A are integrally formed with the elastic holding member 12 in each extending direction, and thus the head portion toward the back surface 10b side. 14 (displacement of the main body portion 16A with respect to the branching portion 16B), that is, the head portion 14 side is not excessively bent toward the back surface 10b side of the toothbrush 1, and an appropriate brushing pressure for the teeth can be obtained.

  In this way, by applying an elastic force to the head portion 14 by the elastic holding member 12, it is possible to absorb excessive brushing pressure, so that the gum cleaning performance is improved without damaging the gums. On the other hand, since the branch portions 16B and 16B are not deformed, the handle portion 16 can be firmly held, and flexible operability is ensured. In the present embodiment, the toothbrush 1 that is easy to fit in the hand is obtained by increasing the tactile flexibility with respect to the handle portion 16.

  As described above, according to the present embodiment, the toothbrush 1 having a flexible operability can be provided by controlling the brushing angle and the brushing pressure with respect to the teeth by gripping the handle portion 16. .

[Second Embodiment]
Next, the structure of the toothbrush 20 of 2nd Embodiment of this invention is demonstrated.
The basic configuration of the toothbrush 20 of the present embodiment described below is substantially the same as that of the first embodiment, but is different in the configuration of the handle portion 26. Therefore, in the following description, a configuration different from the above embodiment will be described in detail, and description of common parts will be omitted. Moreover, in each drawing used for description, the same code | symbol shall be attached | subjected to the same component as FIGS. 1-3.

  FIG. 4A is a plan view of the toothbrush 20. FIG. 4B is a side view of the toothbrush 20. FIG.4 (c) is sectional drawing which follows the AA line of Fig.4 (a).

  As shown in FIG. 4A, the toothbrush 20 in the second embodiment is configured to include a handle portion 26 having a wide finger pad portion 21, and a bulge is given to the distal end side of the handle portion 26. It has a different shape. The finger rest part 21 has a substantially circular shape or an elliptical shape in a plan view viewed from the normal direction of the flocked surface 14a.

  The finger rest part 21 includes a wide part 126 provided on the front end 26d side of the branch parts 26B and 26B located on both sides of the main body part 26A. The wide portion 126 is curved so as to protrude outward in the width direction, and has a shape in which the width dimension gradually changes in the length direction of the toothbrush 20.

  In the present embodiment, for example, the maximum width dimension of the finger pad portion 21 is set to about 1.5 times the width dimension in the gripping region of the toothbrush 20.

  The first side surface 26b1 of the branch portion 26B generally faces the side surface 26a of the main body portion 26A at a substantially constant interval. On the other hand, since the second side surface 26b2 of the branching portion 26B in the finger rest portion 21 is curved outward in the width direction, the distance from the side surface 26a of the main body portion 26A is partially different. The amount of the resin of the elastic holding member 12 disposed between the main body portion 26A and the branching portion 26B is increased by the amount of the gap that is wider than other portions.

  Also in the present embodiment, the side surfaces 26b (first side surface 26b1 and second side surface 26b2) of each branch portion 26B are also inclined in accordance with the inclination of both side surfaces 26a and 26a of the main body portion 26A having a triangular shape in cross section. Yes. Accordingly, by grasping the handle portion 26, the main body portion 26A can be displaced with respect to the branch portions 26B and 26B, and the head portion 14 side can be tilted together with the main body portion 26A. As a result, as in the above embodiment, the hair reaches the back of the back teeth that are difficult to polish, and the teeth can be cleaned well.

  Further, the elasticity of the handle portion 26 can alleviate an excessive brushing pressure in the head portion 14 and obtain an appropriate brushing pressure, so that the cleaning property is improved.

  Furthermore, in this embodiment, since the finger rest part 21 is provided on the neck part 15 side of the handle part 26, it becomes difficult to slip when the toothbrush 20 is gripped. Thereby, the toothbrush 20 can be held stably and firmly, and operativity improves.

[Third Embodiment]
Next, the structure of the toothbrush 30 of 3rd Embodiment of this invention is demonstrated.
The basic configuration of the toothbrush 30 of the present embodiment described below is substantially the same as that of the first embodiment, but is different in the configuration of the handle portion 36. Therefore, in the following description, a configuration different from the above embodiment will be described in detail, and description of common parts will be omitted. Moreover, in each drawing used for description, the same code | symbol shall be attached | subjected to the same component as FIGS. 1-3.

  FIG. 5A is a plan view of the toothbrush 30. FIG. 5B is a side view of the toothbrush 30. FIG.5 (c) is sectional drawing which follows the DD line | wire of Fig.5 (a). FIG.5 (d) is sectional drawing which follows the EE line | wire of Fig.5 (a).

As shown to Fig.5 (a), the toothbrush 30 in 3rd Embodiment has 10 A of toothbrush main bodies, and the elastic holding member 12 which partially covers the outer surface of 10 A of toothbrush main bodies, and is comprised.
The handle portion 36 of the toothbrush 30 includes a main body portion 16A connected to the head portion 14 and the neck portion 15 in the toothbrush main body 10A, branch portions 16B and 16B on both sides thereof, the main body portion 16A, and the branch portions 16B and 16B. The elastic holding member 12 that covers

  The handle portion 36 includes a bulging portion 36A provided on the neck portion 15 side, a bulging portion 36B provided on the opposite side of the neck portion 15, and a constriction provided between the bulging portions 36A and 36B. 36C. The outer contour of the handle portion 36, that is, the outer contour of the elastic holding member 12, is formed with smooth bulged portions 36 A and 36 B and a constricted portion 36 C.

  The position of the constricted portion 36C in the length direction can be arbitrarily set. In the present embodiment, the bulging portion 36B on the rear end side of the toothbrush 30 is longer than the bulging portion 36A on the neck portion 15 side, and functions as the finger pad portion 31 when the bulging portion 36A grips the toothbrush 30. To do.

  The elastic holding member 12 covers the entire surface of the main body portion 16A and the branch portions 16B and 16B, and is formed with a thickness that does not reflect the outer shape of the elastic holding member 12 on the surface 33a of the elastic holding member 12. The thickness of the elastic holding member 12 may be the same on the surface 10a side and the back surface 10b side, or may be different. For example, it is preferable to increase the thickness on the surface 10a side because a high fitting effect can be obtained.

  The elastic holding member 12 can use the same material as the elastic holding member 12 described above. The material and thickness dimension of the elastic holding member 12 are selected so as not to hinder the displacement of the main body portion 16A with respect to the branch portions 16B and 16B.

  In the present embodiment, as shown in FIG. 5B, the front surface 36a and the back surface 36b of the handle portion 36 on the neck portion 15 side gradually move outward from the neck portion 15 side toward the rear end side. It has changed to expand. As described above, the shape of the bulging portion 36A close to the neck portion 15 in the handle portion 36 is changed to a shape in which the thickness gradually changes from the neck portion 15 side, so that the displacement region of the head portion 14 and the handle The relationship between the gripping force on the portion 16 and the amount of displacement can be adjusted.

  In the present embodiment, the entire main body portion 16A and the branch portions 16B and 16B are covered with an elastic holding member 12 made of a soft resin material. Therefore, the main body portion 16 </ b> A of the handle portion 36 is displaced together with the elastic holding member 12. The displacement of the main body portion 16A is transmitted to the user's hand through the holding member, and the gripping force can be adjusted by touch.

  Also in this embodiment, similarly to the previous embodiment, the head portion 14 is bent together with the main body portion 16A, so that the hair reaches a portion that is difficult to polish, such as when the back of the back teeth is polished. For this reason, brushing becomes easy and teeth can be cleaned well. Further, the flexibility of the elastic holding member 12 can relieve excessive brushing pressure and obtain an appropriate brushing pressure, so that the operability is good and the cleaning property is improved.

  Since the thickness and shape of the elastic holding member 12 can be changed as appropriate, the thickness and shape of the handle portion 36 adapted to the hand of the user, such as an adult or a child, can be easily held even by a person with weak grip strength. , Operability and cleaning efficiency are improved.

  If the gaps S and S between the main body portion 16A and the branch portions 16B and 16B are filled with the elastic holding member 12, only the main body portion 16A and at least a part of the branch portions 16B and 16B are covered. It may be configured.

  As described above, the preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the examples. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

  For example, also in the configuration of the first embodiment, the handle portion 16 may be provided with a finger contact portion. In this case, it can be used as a finger pad by forming an unevenness or a concave shape on the surface of the main body portion 16A on the tip side (neck portion 15) side. Thereby, the hold property of the handle | steering-wheel part 16 improves, and it becomes easy to operate the toothbrush 1. FIG.

  DESCRIPTION OF SYMBOLS 1,20,30 ... Toothbrush, 1b ... Back surface, 12 ... Elastic holding member, 13 ... Hair bundle, 14 ... Head part, 14a ... Flocking surface, 15 ... Neck part, 16, 26, 36 ... Handle part, 16A, 26A ... Body part, 16B, 26B ... Branch part, 16a, 26a ... Body part side face, 16b, 26b ... Branch part side face, 36C ... Constriction part, S ... Gap

Claims (7)

A head portion arranged on the tip side and having a hair bundle planted on the flocked surface;
A neck portion extending on the rear end side of the head portion;
A handle portion extending on the rear end side opposite to the head portion of the neck portion,
The handle portion extends along the main body portion, which is continuous from the neck portion, and the other end side is connected to the end of the main body portion with one end side spaced apart in the width direction of the main body portion. The toothbrush characterized by having at least a branch part and the elastic holding member which hold | maintains the said main-body part and the said branch part integrally. The elastic holding member is provided so as to fill a gap between the main body portion and the branch portion.
The toothbrush according to claim 1. At least a part of the main body part and the branch part is covered with the elastic holding member,
The toothbrush according to claim 2. In the width direction crossing the extending direction of the handle part,
The side surface of the main body portion and the inner surface of the branching portion facing the side surface are inclined surfaces that have the same inclination direction and are inclined toward both sides in the width direction from the back side to the flocked surface side, and are parallel to each other. doing,
The toothbrush as described in any one of Claim 1 to 3. The cross-sectional shape that intersects the extending direction of the handle portion has a substantially triangular shape with the flocked surface side as the bottom surface,
The toothbrush according to claim 4. Each of the branch portions on both sides in the width direction of the main body,
In a state where the elastic holding member is not provided, each branch portion extends in a direction away from the main body portion as it goes to the neck portion side,
The toothbrush as described in any one of Claim 1 to 5. The elastic holding member is formed of a softer resin than the resin forming the main body portion and the branch portion.
The toothbrush according to any one of claims 1 to 6.

Images