JP2022011651A - Interdental cleaning instrument - Google Patents

Abstract

To provide an interdental cleaning instrument enhanced in a cleaning ability with surface roughness of a surface of a brush bristle made coarser so as to increase friction resistance between itself and interdental foreign materials.SOLUTION: An interdental cleaning instrument D comprises: a body A having a base part 1, and a shaft part arranged at one of ends of the base part 1; and a cleaning body 4 made of an elastic material having a hardness lower than a hardness of the body A, covering a prescribed length from a tip of the shaft part toward the base part 1, and having an outer shape permitting insertion into between teeth. The cleaning body 4 comprises: a covering part 41 adhering to the whole circumference of the prescribed length of the shaft part; and a brush part 42 having a plurality of brush bristles 421 projecting outward from the covering part 41. At least the one brush bristle 421 among the plurality of brush bristles 421 has at least either one of a plurality of projections 422 and a plurality of recesses on a surface.SELECTED DRAWING: Figure 1

Description

The present invention relates to an interdental cleaning tool for cleaning the interdental space.

Conventionally, an interdental cleaning tool suitable for cleaning the interdental space is known (see, for example, Patent Document 1). The interdental cleaning tool described in Patent Document 1 has a grip portion as a handle that can be gripped with a finger (“handle portion” in Patent Document 1) and a shaft portion extending from the grip portion (Patent Document 1). In No. 1, a cleaning portion for cleaning the interdental teeth located on the tip end side of the “core portion”) is provided. By inserting the cleaning portion between the teeth and reciprocating it, foreign matter (such as food residue) caught between the teeth and foreign matter (such as plaque) adhering to the teeth can be scraped off and removed.

The cleaning portion of the interdental cleaning tool described in Patent Document 1 is configured by integrally molding a cleaning portion main body made of an elastomer material on the tip end side of a shaft portion made of synthetic resin. The portion of the shaft portion covered by the cleaning portion main body is formed in a gently tapered shape whose diameter decreases from the proximal end side to the distal end side. The main body of the cleaning portion includes a coating portion covered with a shaft portion and a plurality of brush bristles (“protrusion portion” in Patent Document 1) formed by projecting outward at intervals in the longitudinal direction of the coating portion. Have.

International Publication No. 2014/0653668

In the interdental cleaning tool described in Patent Document 1, the plurality of brush bristles of the cleaning portion main body are formed in a conical shape with a hemispherically curved tip. The interdental cleaning tool is used by inserting the cleaning part between the teeth and reciprocating it to clean the interdental space. At this time, due to the frictional resistance between the surface of the brush bristles between the teeth and the surface of the foreign matter (food residue, plaque, etc.), the foreign matter between the teeth adheres to the brush bristles and the brush bristles come out from the interdental space. Sometimes they are scraped together and removed from the teeth. However, if the surface of the brush bristles is smooth, the frictional resistance between the brush bristles and the foreign matter becomes small, and even if the foreign matter adheres to the brush bristles, the foreign matter does not move with the movement of the brush bristles, and the brush bristles are between the teeth. Even if it comes out of the hair, foreign matter may not be scraped out and may remain between the teeth.

Therefore, there is a demand for an interdental cleaning tool having an enhanced cleaning ability by increasing the surface roughness of the surface of the brush bristles and increasing the frictional resistance between the teeth and foreign matter.

The configuration of the interdental cleaning tool according to one aspect of the present invention comprises a main body having a base portion and a shaft portion arranged on the side of one end of the base portion, and an elastic material having a hardness lower than the hardness of the main body. The cleaning unit main body is provided with a cleaning unit main body that covers a predetermined length from the tip of the shaft portion toward the base portion and has an outer shape that can be inserted between teeth, and the cleaning unit main body has the predetermined length of the shaft portion. The covering portion is in close contact with the entire circumference of the tooth, and the brush portion has a plurality of brush bristles protruding outward from the covering portion, and at least one of the plurality of the brush bristles is the brush bristles. It is characterized by having at least one of a plurality of convex portions and a plurality of concave portions on the surface.

In this inter-tooth cleaning tool, since at least one brush bristles has at least one of a plurality of convex portions and a plurality of concave portions on the surface (hereinafter, simply referred to as "concave and convex portions"), the surface surface of the brush bristles. The roughness increases. Therefore, compared to the conventional inter-tooth cleaning tool, when the cleaning part is inserted between the teeth and reciprocated, the surface of the brush bristles between the teeth and the uneven part are foreign substances (food residue, plaque, etc.). ), The contact area between the brush bristles including the uneven portion and the foreign matter is increased, and the space between the brush bristles and the foreign matter is increased as compared with the conventional structure interdental cleaning tool having no uneven portion. The frictional resistance of is increased. As a result, the foreign matter between the teeth is scraped out together with the brush bristles when they come out from the teeth and is removed from the teeth.

In addition, since the frictional resistance between the brush bristles and the teeth increases due to the uneven portion, when the brush bristles and the teeth rub against each other during the reciprocating movement of the cleaning part main body, a frictional noise such as "squeaky" may be generated. be. As a result, the user can obtain a feeling of cleaning that the foreign matter is removed from the space between the teeth and the surface of the teeth is clean.

Furthermore, since the surface area of the brush bristles becomes large due to the uneven portion, it is possible to secure a sufficient contact area and adhere to foreign matter that cannot be removed due to insufficient contact area with the brush bristles of the conventional interdental cleaning tool. Therefore, the foreign matter can be effectively scraped out from the teeth by the reciprocating movement of the cleaning portion between the teeth.

Further, when the concave portion is formed on the surface of the brush bristles or when the distance between the plurality of convex portions is short, the scraped foreign matter can be collected in the gap between the concave portion or the convex portion.

As described above, by increasing the surface roughness of the surface of the brush bristles and increasing the frictional resistance between the teeth and the foreign matter, it is possible to provide the interdental cleaning tool having improved cleaning ability.

As another configuration, it is preferable that at least one of the plurality of protrusions and the plurality of recesses is linearly arranged from the tip of the brush bristles toward the covering portion.

With such a configuration, the uneven portion can be brought into close contact with the foreign matter in a straight line, so that the foreign matter can be effectively scraped out from between the teeth and removed.

As another configuration, at least one of the plurality of protrusions and the plurality of recesses is arranged at the front portion and the rear portion of the brush bristles along the direction from the tip end of the shaft portion toward the base portion. Is suitable.

With such a configuration, when the cleaning portion of the interdental cleaning tool is inserted between the teeth and reciprocated, the direction in which the brush bristles bend and the direction in which the uneven portion protrudes become parallel, so that the unevenness of the brush bristles The portion becomes easier to adhere to the foreign matter, and the foreign matter can be more effectively scraped out from between the teeth and removed.

It is a perspective view which shows the interdental cleaning tool which concerns on 1st Embodiment. It is a partially enlarged perspective view which shows the cleaning part main body which concerns on 1st Embodiment. It is a partially enlarged sectional view which shows the cleaning part main body which concerns on 1st Embodiment. It is a partially enlarged perspective view which shows the cleaning part main body which concerns on 2nd Embodiment. It is a partially enlarged sectional view which shows the cleaning part main body which concerns on 2nd Embodiment. It is a top view which shows the interdental cleaning tool which concerns on another embodiment.

Hereinafter, embodiments of the interdental cleaning tool according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications can be made without departing from the gist thereof.

[First Embodiment]
As shown in FIGS. 1 to 3, in the interdental cleaning tool D according to the first embodiment of the present invention, the base portion 1 having the grip portion 11 and the extending portion 12, the bent portion 2 and the shaft portion 3 are integrally molded. The main body A is made of a soft member, which is an elastic material having a hardness lower than the hardness of the main body A, and includes a cleaning part main body 4 that covers the shaft portion 3. Hereinafter, the portion of the shaft portion 3 covered with the cleaning portion main body 4 and the cleaning portion main body 4 are collectively referred to as a cleaning portion B. The user has the grip portion 11, inserts the cleaning portion B between teeth such as molars, and reciprocates the cleaning portion B to use the interdental cleaning tool D. Hereinafter, among the interdental cleaning tools D, the outside of the bend from the base 1 to the bend 2 (on the right side of the paper in FIG. 1) will be referred to as the dorsal side, and the inside of the bend (on the left side of the paper in FIG. 1) will be referred to as the ventral side.

The main body A is composed of one or a combination of two or more synthetic resins such as polypropylene, ABS, polybutylene terephthalate, polycarbonate, polyethylene terephthalate, polystyrene, and polyacetal. The main body A in this embodiment is made of polypropylene. Further, it is preferable that the synthetic resin constituting the main body A contains a reinforcing agent for increasing the rigidity. Examples of the reinforcing agent include fibrous reinforcing agents such as glass fiber, nanocellulose fiber, aramid fiber, and carbon fiber, plate-shaped reinforcing agents such as mica and glass frame, powder-like strengthening agents such as talc, and warastonite. Needle-shaped strengthening agent can be mentioned. The content of the fortifier is 5% by weight or more and 50% by weight or less, preferably 10% by weight or more and 40% by weight or less, and more preferably 15% by weight or more and 40% by weight or less.

The soft member, which is the material of the cleaning unit main body 4, is made of an elastomer having a hardness lower than the hardness of the main body A. As this elastomer, a styrene-based elastomer is preferable, and silicon, an olefin-based elastomer, a polyester-based elastomer, or the like may be used.

In the main body A, the extending portion 12 is formed in the shape of a flat rod extending from the grip portion 11 in the first direction Xa. Further, the bent portion 2 extends from the end portion of the extending portion 12 opposite to the grip portion 11 and intersects the first direction Xa from the first direction Xa (in the embodiment of FIG. 1, the bending internal angle is 120). Degree) It is composed of a flat shape that bends toward the second direction Xb. The crossing angle (bending internal angle) between the first direction Xa and the second direction Xb is composed of 30 degrees or more and 150 degrees or less, preferably 80 degrees or more and 140 degrees or less, and more preferably 100 degrees or more and 130 degrees or less. It is good to be there.

A back surface portion 5 covered with a soft member is formed on about half of the extending portion 12 and the bent portion 2 of the main body A on the dorsal side. Synthetic resin is exposed on about half of the extending portion 12 and the bending portion 2 of the main body A on the ventral side.

In the main body A, the shaft portion 3 is formed in the shape of a truncated cone rod that gradually tapers along the second direction Xb from the end portion opposite to the extending portion 12 with respect to the bent portion 2 (FIG. 3). reference). That is, the entire outer shape of the shaft portion 3 has a tapered surface whose diameter decreases (reduces in diameter) at a constant rate from the connection portion with the bent portion 2 toward the tip end.

The cleaning portion main body 4 made of a soft member covers the entire outer peripheral surface of the shaft portion 3 and has an outer shape that can be inserted between teeth, and constitutes the cleaning portion B together with the shaft portion 3. The cleaning unit main body 4 in the present embodiment includes a covering portion 41 that covers and adheres to the entire longitudinal direction (direction along the second direction Xb) of the shaft portion 3, and a plurality (many) protruding outward from the covering portion 41. It has a brush portion 42 having a brush bristles 421. The covering portion 41 is configured to have a wall thickness (thickness) smaller than the diameter of the shaft portion 3. The brush bristles 421 of the brush portion 42 are formed in a conical shape that becomes tapered as it is separated from the covering portion 41 (as it goes radially outward with respect to the axis X of the shaft portion 3). The axis X of the shaft portion 3 means an axis (center line) passing through the center of the shaft portion 3. Further, each brush bristles 421 has a plurality of convex portions 422 protruding from the surface. In the interdental cleaning tool D according to the present embodiment, when the cleaning portion B is inserted between the teeth and reciprocates, the brush bristles 421 of the brush portion 42 are flexibly deformed, and the covering portion 41 and a plurality of protrusions are formed. The brush bristles 421 including the portion 422 are in close contact with the teeth, and foreign substances (such as food scraps) caught between the teeth and foreign substances (such as plaque) adhering to the teeth can be scraped off and removed. The back surface portion 5 formed on the back side of the extending portion 12 and the bending portion 2 is integrally formed with the cleaning portion main body 4. The cleaning unit main body 4 may have a structure that covers a part of the shaft portion 3 from the tip end in the longitudinal direction of the shaft portion 3.

Next, a method of manufacturing the interdental cleaning tool D according to the present embodiment will be described. The interdental cleaning tool D is manufactured by a two-color molding method in which the cleaning portion main body 4 and the like are molded on the shaft portion 3 of the main body A made of synthetic resin by a known method such as injection molding. Specifically, first, the main body A is formed by a known method such as injection molding. Next, the formed main body A is placed on a mold for two-color molding, and the molten elastomer is injected into the mold from a gate provided near the tip of the shaft portion 3 of the main body A to fill the mold. The filled molten elastomer solidifies into a soft member, and the cleaning portion main body 4 and the back surface portion 5 are formed. At this time, a plurality of convex portions 422 are also integrally formed. In this way, the interdental cleaning tool D is manufactured.

Next, the structure of the cleaning unit main body 4 of the interdental cleaning tool D according to the present embodiment will be described in detail. As described above, the cleaning unit main body 4 of the interdental cleaning tool D includes a covering portion 41 that covers the entire circumference of the shaft portion 3 and covers a predetermined length and adheres to the covering portion 41, and a plurality (many) that protrude outward from the covering portion 41. It has a brush portion 42 having the brush bristles 421 of the above. In the present embodiment, the "predetermined length" of the covering portion 41 is 10 mm to 30 mm, preferably 15 mm to 25 mm, and more preferably 15 to 20 mm.

As described above, each brush bristles 421 of the brush portion 42 has a plurality of convex portions 422 protruding in the direction perpendicular to the surface. The convex portion 422 is formed in a columnar shape or a conical shape having a hemispherical tip, but the shape is not limited. The protruding height of the convex portion 422 is 0.01 to 1.0 mm, preferably 0.02 to 0.9 mm, and more preferably 0.03 to 0.8 mm.

The plurality of convex portions 422 are arranged linearly from the tip 423 of the brush bristles 421 toward the covering portion 41. The "straight line" means that when a straight line having the shortest distance is drawn from the tip 423 toward the covering portion 41 along the surface (side surface) of the brush bristles 421, a plurality of convex portions 422 are arranged on the straight line. It means that you are. In the present embodiment, the plurality of convex portions 422 are linearly formed on the front portion, the rear portion, and both side portions of the brush bristles 421 when viewed along the direction from the tip end of the shaft portion 3 toward the base portion 1. Have been placed. As shown in FIG. 2, "front part, rear part" means that a plurality of convex portions 422 have a virtual plane P passing through an axis X of the shaft portion 3 and a tip 423 of the brush bristles 421. It means that the brush bristles 421 are arranged so as to project in a direction parallel to the axis X on two intersecting lines L2 and L2 intersecting the surface (side surface) of the brush bristles 421 (see also FIG. 3). That is, in a plan view (viewing the shaft core X from the tip 423 of an arbitrary brush bristles 421), the plurality of convex portions 422 are arranged so as to overlap the shaft core X. Further, "arranged on both sides" means a direction orthogonal to the protruding direction of the plurality of convex portions 422 arranged on the front portion and the rear portion, that is, through the tip 423 to the axis X. It means that the virtual planes (not shown) orthogonal to each other are arranged so as to project on the two intersecting lines L3 and L3 intersecting the surface of each brush bristles 421 in the direction orthogonal to the axis X. .. As shown in FIG. 2, a plurality of brush hairs 421 are all arranged in a row on a straight line L1 where the virtual plane P and the covering portion 41 intersect, but the present invention is not limited to this. The plurality of brush bristles 421 may not all be arranged in a row on the straight line L1. Further, the plurality of convex portions 422 are not limited to the front portion, the rear portion, and the side portion of the brush bristles 421, and may be arranged so as to project in any direction of the brush bristles 421.

As described above, in the interdental cleaning tool D according to the present embodiment, since the brush bristles 421 have a plurality of convex portions 422 on the surface, the surface roughness of the surface of the brush bristles 421 becomes large. Therefore, as compared with the conventional inter-tooth cleaning tool, when the cleaning portion B is inserted between the teeth and reciprocated, the surface of the brush bristles 421 between the teeth and the convex portion 422 become foreign matter (eating residue or food residue). Since it is in close contact with the surface of dental plaque, etc.), the contact area between the brush bristles 421 including the convex portion 422 and the foreign matter is increased, and the brush is compared with the conventional structure interdental cleaning tool having no convex portion 422. The frictional resistance between the hair 421 and the foreign matter increases. As a result, the foreign matter between the teeth is scraped out together when the brush bristles 421 come out from the teeth and is removed from the teeth.

Further, since the frictional resistance between the brush bristles 421 and the teeth is also increased by the plurality of convex portions 422, when the brush bristles 421 and the teeth rub against each other during the reciprocating movement of the cleaning portion main body 4, for example, "gyu-gyu". Friction noise may occur. As a result, the user can obtain a feeling of cleaning that the foreign matter is removed from the space between the teeth and the surface of the teeth is clean.

Further, since the surface area of the brush bristles 421 is increased by the convex portion 422, a sufficient contact area is secured and adhered to foreign matter that cannot be removed due to insufficient contact area with the brush bristles of the conventional interdental cleaning tool. Therefore, the foreign matter can be effectively scraped out from between the teeth by the reciprocating movement of the cleaning portion B between the teeth. Further, when the distance between the plurality of convex portions 422 is short, the scraped foreign matter can be collected in the gap between the convex portions 422.

[Second Embodiment]
Next, the interdental cleaning tool D according to the second embodiment of the present invention will be described with reference to FIGS. 4 and 5. Unlike the first embodiment, the interdental cleaning tool D according to the present embodiment has a plurality of concave portions 424 formed on the brush bristles 421 instead of the convex portions 422. In the description of the present embodiment, the same reference numerals are given to the parts having the same configuration as that of the first embodiment, and the description of the same configuration will be omitted.

Each brush bristles 421 of the brush portion 42 has a plurality of recesses 424 recessed in the direction perpendicular to the surface. The recess 424 is formed as a bottomed hole. The recess depth of the recess 424 is 0.01 to 1.0 mm, preferably 0.02 to 0.9 mm, and more preferably 0.03 to 0.8 mm. Further, the hole shape of the recess 424 is not particularly limited.

Similar to the plurality of convex portions 422 of the first embodiment, the plurality of concave portions 424 are arranged linearly from the tip end 423 of the brush bristles 421 toward the covering portion 41. Further, the plurality of recesses 424 are linearly arranged in the front portion, the rear portion, and the side portion of the brush bristles 421 along the direction from the tip end of the shaft portion 3 toward the base portion 1. The definitions of "straight", "front", "rear", and "both sides" are the same as in the first embodiment. The plurality of recesses 424 are not limited to the front portion, the rear portion, and the side portion of the brush bristles 421, and may be recessed in any direction of the brush bristles 421.

Even if the outer diameter of the brush bristles 421 of the brush portion 42 of the interdental cleaning tool D according to the present embodiment is the same as the outer diameter of the brush bristles 421 of the brush portion 42 of the interdental cleaning tool D of the first embodiment. It may be a little thicker. If the outer diameter of the brush bristles 421 of the brush portion 42 of the interdental cleaning tool D of the first embodiment is the same, the outer diameter of the entire brush bristles 421 is the same as the outer diameter of the brush bristles of the conventional interdental cleaning tool. Therefore, the cleaning portion B does not become difficult to enter between the teeth, and the same operability as before can be maintained.

As described above, in the interdental cleaning tool D according to the present embodiment, since the brush bristles 421 have a plurality of recesses 424 on the surface, the surface roughness of the surface of the brush bristles 421 becomes large. Therefore, as compared with the conventional interdental cleaning tool, when the cleaning portion B is inserted between the teeth and reciprocated, the surface of the brush bristles 421 between the teeth and the concave portion 424 are foreign substances (food scraps and teeth). Since it is in close contact with the surface of plaque, etc., the contact area between the brush bristles 421 including the concave portion 424 and the foreign matter is increased, and the brush bristles 421 are compared with the conventional structure interdental cleaning tool having no concave portion 424. The frictional resistance with foreign matter increases. As a result, the foreign matter between the teeth is scraped out together when the brush bristles 421 come out from the teeth and is removed from the teeth. It is also possible to collect the scraped foreign matter in the plurality of recesses 424 and remove the foreign matter.

Further, since the frictional resistance between the brush bristles 421 and the teeth is also increased by the plurality of recesses 424, when the brush bristles 421 and the teeth rub against each other during the reciprocating movement of the cleaning unit main body 4, for example, a frictional noise such as "gyu-gyu" is heard. May occur. As a result, the user can obtain a feeling of cleaning that the foreign matter is removed from the space between the teeth and the surface of the teeth is clean.

Further, since the surface area of the brush bristles 421 is increased by the concave portion 424, a sufficient contact area is secured and adhered to foreign matter that cannot be removed due to insufficient contact area with the brush bristles of the conventional interdental cleaning tool. Therefore, the foreign matter can be effectively scraped out from between the teeth by the reciprocating movement of the cleaning portion B between the teeth.

[Other embodiments]
(A) In the first embodiment, the convex portion 422 has a cylindrical shape, but the shape is not limited to this. The convex portion 422 may have a prismatic shape. Further, the convex portion 422 may be conical or pyramidal. The convex portion 422 can have any shape as long as the surface area of the brush bristles 421 is increased.

(B) In the second embodiment, the concave portion 424 has a circular cross section, but the concave portion 424 is not limited to this shape. The recess 424 may have a square cross section. Further, the recess 424 may be a tapered hole whose cross-sectional area decreases from the surface to the bottom. The recess 424 can have any shape as long as the surface area of the brush bristles 421 is increased.

(C) In the first embodiment and the second embodiment, the plurality of convex portions 422 and the plurality of concave portions 424 are arranged linearly from the tip 423 of the brush bristles 421 toward the covering portion 41. Not limited. For example, a plurality of convex portions 422 and a plurality of concave portions 424 may be spirally arranged on the surface (side surface) of the brush bristles 421 from the tip 423 of the brush bristles 421 toward the covering portion 41. The arrangement of the plurality of convex portions 422 and the plurality of concave portions 424 is arbitrary and can be freely arranged.

(D) In the first embodiment and the second embodiment, only one of the convex portion 422 and the concave portion 424 is arranged on the plurality of brush bristles 421 of the brush portion 42 with respect to all the brush bristles 421. However, it is not limited to this. For example, the plurality of brush bristles 421 of the brush portion 42 may be composed of only the brush bristles 421 in which both the plurality of convex portions 422 and the plurality of concave portions 424 are arranged in one. In particular, the number of convex portions 422 can be reduced by arranging a plurality of concave portions 424 in places where the convex portions 422 of the brush bristles 421 of the first embodiment are not arranged (locations on the smooth surface of the brush bristles 421). Since the concave portion 424 can be arranged without the brush bristles 421, the surface roughness of the brush bristles 421 is further increased and the surface area is increased as compared with the brush bristles 421 of the first embodiment, so that the contact area with foreign matter between teeth is further increased. It can be secured and adhered. As a result, the foreign matter can be more effectively scraped out from the teeth by the reciprocating movement of the cleaning portion B between the teeth. Further, both the convex portion 422 and the concave portion 424 may be freely arranged.

(E) The plurality of brush bristles 421 of the brush portion 42 are a brush bristles 421 in which only a plurality of convex portions 422 are arranged, a brush bristles 421 in which only a plurality of concave portions 424 are arranged, a plurality of convex portions 422 and a plurality of concave portions. Of the brush bristles 421 in which both of the 424s are arranged and the brush bristles 421 having a smooth surface on which neither the convex portion 422 nor the concave portion 424 is arranged, even if any two or more types of brush bristles 421 are arranged in combination. good. The arrangement of the convex portion 422 and the concave portion 424 of the brush bristles 421 in the brush portion 42 and the combination of the brush bristles 421 thereof are arbitrary.

(F) As shown in FIG. 6, the interdental cleaning tool D does not have the bent portion 2 of the first embodiment, and the base portion 1 and the shaft portion 3 having the grip portion 11 and the extending portion 12 are formed. It may be composed of an integrally molded linear main body A. In the interdental cleaning tool D according to the present embodiment, the cleaning portion main body 4 is formed only in a part (an example of a predetermined length) from the tip of the shaft portion 3. At this time, the shape of the shaft portion 3 and the cleaning portion main body 4 can be any of the above-mentioned first embodiment, the second embodiment, and other other embodiments (a) to (e). As described above, if the shapes of the shaft portion 3 and the cleaning portion main body 4 are as described above, the shape of the main body A is arbitrary.

INDUSTRIAL APPLICABILITY The present invention can be used as an interdental cleaning tool for cleaning interdental spaces.

1: Base part 3: Shaft part 4: Cleaning part main body 41: Covering part 42: Brush part 421: Brush bristles 422: Convex part 423: Tip 424: Concave part A: Main body D: Tooth cleaning tool

Claims (3)

A main body having a base portion and a shaft portion arranged on the side of one end of the base portion,
It is made of an elastic material having a hardness lower than the hardness of the main body, covers a predetermined length from the tip of the shaft portion toward the base portion, and has a cleaning portion main body having an outer shape that can be inserted between teeth.
The cleaning portion main body includes a covering portion in close contact with the entire circumference of the shaft portion having the predetermined length, and a brush portion having a plurality of brush bristles protruding outward from the covering portion.
At least one of the plurality of brush bristles is an interdental cleaning tool having at least one of a plurality of protrusions and a plurality of recesses on the surface. The interdental cleaning tool according to claim 1, wherein at least one of the plurality of protrusions and the plurality of recesses is arranged linearly from the tip of the brush bristles toward the covering portion. The second aspect of the present invention, wherein at least one of the plurality of protrusions and the plurality of recesses is arranged at the front portion and the rear portion of the brush bristles along the direction from the tip end of the shaft portion toward the base portion. The listed interdental cleaning tool.

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