JPH0650530U - toothbrush - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a toothbrush capable of effectively cleaning the boundary part between the cervical region and the gingiva. A brush 12 is formed into a bunch 13 on the bristling surface 11a of the head 11, and the bristle of the brush at the peripheral portion of the bunch 13 is made long and the bristles of the brush 12 at the central portion are shortened. A concave portion 1 whose central portion is recessed in an inverted conical shape at the tip of the bundle 13
3a is formed, and when the hair bundle 13 is pressed against the teeth, the tip portion of the brush 12 in the peripheral portion of the hair bundle 13 is locally deformed to the outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a toothbrush used for toothbrushing, and more particularly to a toothbrush capable of effectively cleaning the neck of the tooth and thus preventing alveolar pyorrhea.

[0002]

[Prior art]

 As is well known, a toothbrush forms a bristle surface on a head integrated with a handle, and a bristle is brushed on this bristle surface. In such a toothbrush, a brush is usually bundled into a plurality of bristle bundles, and the bristle bundles are arranged at equal intervals on a flocked surface.

[0003]

[Problems to be solved by the device]

 However, in the above-described toothbrush, the contact angle of the brush with the teeth depends on the insertion angle of the head into the mouth, so that the tooth neck, especially the boundary with the gingiva where plaque is most likely to adhere, is There was a problem that it was difficult to clean effectively. The present invention has been made in view of the above problems, and an object thereof is to provide a toothbrush that can effectively clean the tooth neck.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, according to the present invention, in a toothbrush in which brushes are bunched on a bristling surface of a head and bristles are bristled, a tip of the bristles is formed in a concave shape with a central recess. The toothbrush of the present invention has a mode in which the bristles on the outer peripheral side of each bristle bundle are soft and the bristles on the inner side are hard, and the tip of the peripheral edge of the recessed portion is sharpened, that is, formed into an edge shape. Can be configured.

[0005]

[Action]

 According to the toothbrush according to the present invention, the tip of the bristle bundle is formed in a concave shape with the central portion depressed, so that when the bristle bundle is pressed against the tooth surface, the tip portion of the brush is partially deformed outward. Therefore, it is possible to effectively clean the boundary between the cervical region and the gingiva, regardless of the insertion angle of the head into the mouth, and the plaque that is removed is attracted to the center of the hair bundle. , A good brushing feeling can be obtained. In addition, according to the present invention, by softening the hairs on the outer peripheral side of each hair bundle and hardening the inner hairs, a better usability can be obtained, and the peripheral edge of the recessed portion is shaped like an edge. This makes it possible to more effectively clean the boundary with the gums.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a toothbrush according to an embodiment of the present invention, FIG. 1 is a sectional view of a main part of the toothbrush, FIG. 2 is a partially enlarged perspective view of the toothbrush, and FIG. 3 is a use state. FIG.

In FIG. 1, reference numeral 11 denotes a head, which is not shown, but the head 11 is formed integrally with the neck and the handle by resin injection molding or the like. The head 11 has a substantially rectangular flocked surface 11a formed on one side, and the bristles 12 are bundled into a plurality of tufts 13 on the flocked surface 11a to be flocked.

Each of the bristles 13 is formed by bundling in a circular shape with the soft brush 12 on the outer side and the hard brush 12 on the inner side, and is fixed to the flocked surface 11a by welding or the like. As shown in detail in FIG. 2, in these hair bundles 13, the brush 12 of the central portion is short, the brush 12 of the peripheral portion is long, and an inverted conical recess 13a is formed at the tip. The annular peripheral edge of the recess 13a is formed into a sharpened edge.

In the embodiment described above, the conical recess 13a is formed at the tip of the hair bundle 13. However, the present invention is not limited to the conical recess 13a, but may be formed as shown in FIG. 4a. It is also possible to form a deeply inverted conical recess 21a, a semicircular recess 22a as shown in FIG. 4b, and a trapezoidal recess 23a as shown in FIG. 4c.

In this embodiment, when the head 11 is inserted into the mouth to brush teeth, when the hair bundles 13 are pressed against the teeth T as shown in FIG. Deforms to the outside locally. Therefore, the tip ends of the brushes 12 in the peripheral portion of the hair bundle 13 come into contact with the boundary portion between the tooth neck and the gingiva, and the boundary portion and the periodontal pocket can be effectively cleaned. Then, the removed plaque is scraped into the concave portion 13a at the center of the hair bundle 13, so that the plaque does not scatter in the mouth and a good brushing feeling is obtained.

In particular, in this embodiment, since each hair bundle 13 is formed by the soft brush 12 on the outer side and the hard brush 12 on the inner side, an appropriate contact feeling and high cleanability are obtained, and the recess 13 Since the peripheral edge of a is shaped like a sharpened edge, the boundary portion can be cleaned more effectively.

The toothbrush of this embodiment can be manufactured as follows. That is, first, the brushes 12 are bundled so that the recesses 13a are formed, and the base ends of the bundled brushes 12 are welded to form the hair bundles 13, or the hair bundles 13 are formed and then the recesses are formed. 13a is formed. Then, the hair bundle 13 is planted on the head 11 to be manufactured. The flocking to the head 11 is described in the method by heat fusion described in JP-A-60-241404, and in JP-A-61-268208 and JP-A-2-503150. Such a hair bundle 13 is put in a mold and the head 11 is injection-molded.

[0013]

[Effect of device]

 As described above, according to the toothbrush according to the present invention, the tip of the bristle bundle is formed into an inverted conical shape with a recessed central portion. Therefore, when the bristle bundle is pressed against the teeth, the tip portion of the brush around the bristle bundle is Is locally deformed, and the effect of being able to effectively clean the boundary part of the cervical region with the gingiva, etc. is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a toothbrush according to an embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view of the toothbrush.

FIG. 3 is a schematic diagram for explaining a usage state of the toothbrush.

4A, 4B and 4C are cross-sectional views of essential parts of a toothbrush according to another embodiment of the present invention.

[Explanation of symbols]

 11 Head 11a Bristling surface 12 Brush 13 Hair bundle 13a Recess 21a Recess 22a Recess 23a Recess

Claims (1)

[Scope of utility model registration request] 1. A toothbrush in which brushes are bundled and bristled on a bristling surface of a head, and the tips of the bristles are formed in a concave shape having a depressed central portion.