JPH0640846B2 - toothbrush - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothbrush, and more particularly to a toothbrush structure suitable for brushing adjacent surfaces (between teeth).

[0002]

2. Description of the Related Art A conventional toothbrush, as shown in FIG.
It is composed of a flat rod-shaped handle portion 14 and a brush portion 16 in which a plurality of nylon bristles 15 are vertically planted on the plane of the end portion of the handle portion 14.

[0003]

As a place where tooth decay is likely to occur, especially the adjacent surface (between the teeth 18 and 17) 17
(See FIG. 8). Currently adjacent surface 17
The so-called "push-and-shake polishing" is becoming the main method of brushing. That is, as shown in FIG. 8, first, the brush portion 16 of the toothbrush is applied to the tooth row, and the bristle tips of the nylon bristles 15 are inserted into the adjacent surface 17. When the bristle tips of the nylon bristles 15 are inserted into the adjacent surface 17, the brush portions 16 are swung laterally so that the bristle tips of the nylon bristles 15 do not come off from the adjacent surface 17 (arrow a,
B). Then, the tips of any nylon bristles 15 have an adjacent surface 1
Moves as if it moves into or out of position 7 while flexing. When the brush part 16 is shaken about 20 to 30 times at one place, the plaque on the adjacent surface 17 drops due to the action of the tips of the nylon bristles 15. By the way, in the above-mentioned conventional toothbrush, since the nylon bristles 15 are directly and vertically planted on the flat surface of the end of the handle portion 14, in order to insert the bristle tips of the nylon bristles 15 into the adjacent surface 17, The brush part 16 must be pressed firmly against the dentition. However, if the brush portion 16 is strongly pressed against the tooth row in this manner, the gingiva may be damaged by the tips of the nylon bristles 15, and the portion may become purulent. The present invention has been made in view of such a current situation, and provides a toothbrush that can easily insert the tips of nylon bristles into the adjacent surface without pressing the brush portion strongly against the tooth row. It is intended.

[0004]

Therefore, according to the present invention, in a toothbrush comprising a rod-shaped handle and a brush provided at an end of the handle, the base of the brush is provided with a long handle. A plurality of columnar rotating bodies that are rotatable only within a certain range in the axial direction are provided at equal intervals, and hair is planted at both ends of the outer periphery of the rotating bodies. In addition, a plurality of spherical rotating bodies that can freely rotate only within a certain range are provided on the base of the brush portion at equal intervals, and the bristles are planted on the rotating bodies.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of a toothbrush according to the present invention, FIG. 2 is an enlarged perspective view of a brush portion in FIG. 1, and FIG.
4 is a perspective view showing another embodiment of the toothbrush according to the present invention, FIG. 5 is a sectional view taken along line II-II of FIG. 4, and FIG.
FIG. 7 is an explanatory view of the operation of the nylon bristles shown in FIG. 7, FIG. 7 is a perspective view showing a conventional technique, and FIG. 8 is an explanatory view showing a method for brushing adjacent surfaces.

As shown in FIGS. 1 to 3, the toothbrush A
Is composed of a flat rod-shaped handle portion 1 and a brush portion 2 provided at an end portion of the handle portion 1. The brush part 2
A plurality of cylindrical recesses 4 are formed at regular intervals on the base 3 of the handle 3 at right angles to the long axis direction of the handle 1. Inside the recesses 4, cylindrical rotating bodies 5 are formed. It is housed. Here, on the peripheral surface of the rotating body 5, the ridges 5 are formed along the axial direction thereof.
a is formed, and the ridge portion 5 a is positioned at the opening of the recess 4. Further, contact surfaces 4a, 4a are formed on both sides of the opening of the recess 4 so that the protrusion 5a is brought into contact with the contact surfaces 4a, 4a. As a result, the rotating body 5 can rotate only within a certain range in the major axis direction of the handle 1. Nylon bristles 6 are vertically planted at both ends of the upper surface of the ridge 5a. By configuring the brush portion 2 as described above, the nylon bristles 6 and 6 planted in the adjacent rotating bodies 5 and 5 are tilted by the rotation of the rotating bodies 5 and 5 so that their bristle tips come into contact with each other. Can be made (dotted line in FIG. 3).

Next, the operation of this embodiment will be described. When the brush portion 2 of the toothbrush A is applied to the dentition, the tips of the nylon bristles 6 try to slide on the surfaces of the teeth 18 (FIG. 8), whereby a rotational force acts on the rotating body 5 via the nylon bristles 6. To do. This rotation of the rotating body 5 causes the nylon bristles 6 to tilt (indicated by the one-dot chain line in FIG. 3), and the tips of the nylon bristles 6 smoothly enter the adjacent surface 17 (between the teeth 18 and 18) ( (State of FIG. 8). In this way, the tips of the nylon bristles 6 can be attached to the adjacent surface 17 by simply applying the brush portion 2 to the dentition.
Since it can be made to enter, the tip of the nylon hair 6 does not damage the gums, and as a result,
There is no risk of gingival suppuration. When the bristle tips of the nylon bristles 6 are inserted into the adjacent surface 17 as described above, the brush portion 2 is swung laterally so that the bristle tips of the nylon bristles 6 do not come off from the adjacent surface 17. Then, the tips of any nylon bristles 6 move in such a manner that the tips of the nylon bristles 6 move into the adjacent surface 17 while moving or not moving. Nylon bristles 6 when the brush part 2 is shaken about 20 to 30 times at one place.
The plaque on the adjacent surface 17 drops due to the work of the hair tips.

In the above embodiment, the nylon bristles have the handle 1.
Although it is configured to incline only in the major axis direction, the following effect can further enhance the effect. That is, as shown in FIGS. 4 to 6, a plurality of spherical recesses 10 are formed on the upper surface of the pedestal 9 of the brush portion 8 at equal intervals, and each of the recesses 10 has a spherical shape. The rotating body 11 is housed. Here, the rotating body 1
A ridge 11a is formed on the outer surface of No. 1 in the radial direction, and the ridge 11a is positioned at the opening of the recess 10. Further, a contact surface 10a is formed along the inner circumference of the opening of the recess 10 so that the ridge 11a is brought into contact with the contact surface 10a. Thus, the rotating body 11 can freely rotate only within a certain range. The ridge 1
Nylon bristles 12 are planted in 1a. By configuring the brush portion 8 as described above, each nylon bristles 1
2 can tilt freely within a certain range (Fig. 5,
As a result, since the tips of four adjacent nylon hairs 12 can be gathered together, the number of nylon hairs 12 entering each adjacent surface 17 increases and the brushing effect is improved.

[0009]

According to the present invention, since the toothbrush is constructed as described above, the tips of the nylon bristles are brought into contact with the adjacent surface (between the teeth) by simply applying the brush portion to the tooth row. Since it can be inserted, the gingiva is not damaged by the tips of the nylon hairs 6 and, as a result, there is no fear that the gingiva may become suppurated.

[Brief description of drawings]

FIG. 1 is a perspective view of a toothbrush according to the present invention.

FIG. 2 is an enlarged perspective view of a brush unit in FIG.

3 is a cross-sectional view taken along the line I-I of FIG.

FIG. 4 is a perspective view showing another embodiment of the toothbrush according to the present invention.

5 is a sectional view taken along line II-II of FIG.

6 is an operation explanatory view of the nylon bristles shown in FIG. 4. FIG.

FIG. 7 is a perspective view showing a conventional technique.

FIG. 8 is an explanatory diagram showing a brushing method for adjacent surfaces.

[Explanation of symbols]

 A Toothbrush 1 Handle part 2 Brush part 3 Pedestal 4 Recess 4a Contact surface 5 Rotating body 5a Convex section 6 Nylon bristles 8 Brush section 9 Pedestal 10 Recess 10a Contact surface 11 Rotating body 11a Convex section 12 Nylon bristle

Claims (2)

[Claims] 1. A toothbrush comprising a rod-shaped handle portion and a brush portion provided at an end of the handle portion, the toothbrush being rotatable on a base of the brush portion only in a certain range in a longitudinal direction of the handle portion. A toothbrush characterized in that a plurality of columnar rotating bodies are provided at equal intervals, and bristles are planted on both ends of the outer periphery of the rotating body. 2. A toothbrush comprising a rod-shaped handle and a brush provided at an end of the handle, wherein a plurality of spherical rotations are freely rotatable on a base of the brush only within a certain range. A toothbrush characterized in that bodies are provided at equal intervals, and bristles are planted on the rotating body.