JPH025418B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an oral cavity cleaning aid, and particularly to an oral cavity cleaning aid in which two types of flocked portions are formed on one synthetic resin body, and a method for manufacturing the same.

BACKGROUND TECHNOLOGY There are various types of oral cleaning aids currently on the market as interdental brushes or interdental brushes, but their primary purpose is to clean between teeth, which cannot normally be cleaned sufficiently with a toothbrush. It is. That is, in the oral cavity, about 3 minutes after eating, food particles decompose and acid is generated, and this acid decomposes tooth enamel. This acid is generated when the sugars and starches contained in food particles adhering to the teeth are fermented and decomposed by bacteria in the mouth, so even if you clean your teeth with toothpicks after meals, the food particles are not completely removed and the It causes stains. Therefore, it is originally desirable to clean the inside of the oral cavity before acid generation, that is, immediately after eating, but in daily life, it is actually difficult to clean the mouth with a toothbrush immediately after eating. For this reason, an oral cavity cleaning aid shown in FIG. 10 was developed. This oral cleaning aid is
It is called an interdenter brush, and a tapered part 21 is formed at one end of a synthetic resin body 20. An end portion of a thin twisted wire 22 is embedded in the tip of the tapered portion 21, and a brush portion 24 is formed by flocking synthetic resin fibers 23 over almost the entire length of the wire 22.

This pick brush can be attached to the holder 25 as needed.
is inserted into the center hole 26 of the
After use, the main body 20 can be disposed of, or the main body 20 can be attached from the brush part 24 to the center hole 26 of the holder 25 and carried. However, this is not very desirable from a hygienic point of view.

However, the conventional interdenter brush mentioned above,
Since hard twisted wires are used, teeth or gums may be damaged during use, and the manufacturing method of embedding the ends of the twisted wires in the resin body 20 and implanting fibers requires complicated resin molding and flocking processes. required and was not suitable for continuous production. Also, the wire 2
2 has a diameter of 1.2 mm at its smallest, so this wire could not be inserted smoothly between the teeth, and in the end,
It was also not suitable for interdental cleaning.

Problems to be Solved by the Invention Therefore, the present invention solves the above-mentioned drawbacks by providing a new oral cleaning aid and a method for manufacturing the same.

EXAMPLE The oral cavity cleaning aid and the manufacturing method thereof according to the present invention will be explained with reference to the drawings.

1 and 2 show an oral cleaning aid of the present invention called a pickbrush. This brush has an elongated synthetic resin main body 30 with a tapered part 31 formed at one end and a right-angled surface 32 at the other end, and a first bristle part 33 is formed in the tapered part 31. A second flocked portion 34 is provided on the right-angled surface 32.
is formed. The first flocked part 31 has a tapered part 31
The fibers 35 protrude from the main body in a spiral manner, whereas the fibers 36 protrude linearly from the main body in the second flocked portion. A recess 37 can be formed in the main body 30 at an appropriate position as desired. Main body 3
By bending the 0 in this recessed part, the angle of each bristle part can be arbitrarily adjusted according to the surface of the teeth to be cleaned.

The first flocked part 33 and the second flocked part 34 are formed of continuous fibers passing through the main body 30, as described later. That is, the intermediate portion of the fiber is molded with resin, and both ends of the fiber form the first and second flocked portions.

FIG. 3 shows a mold 40 for molding a pick brush. This mold 40 is expressed without dimensions, and has a fixed mold 41 and a movable mold 42. As shown in FIG. 5, the fixed mold 41 includes a cavity 45,
A conical cavity 46 formed at the end of the cavity 45, a plurality of passages 47 connected to the conical cavity 46 and formed in an inclined angle direction, and a gate 48 formed at the end of the conical cavity 46.
and a runner 49 communicating with this gate 48. The cavity 45 has a recess 37 in the pick brush.
In order to form a convex portion 49, the fixed mold 41 becomes a two-part mold. However, if the recess 37 is not formed, it is not necessary to use a split type.

As shown in FIG. 4, the movable mold 42 has an upper mold 5.
0 and a lower mold 51, with an outlet 5 approximately in the center.
2 is formed. The lower mold 51 is connected to the outlet 52 and connected to the fixed mold 4, as shown in FIGS. 6 and 7.
A hole 53 is formed that accommodates the end of one. Exit 5
2 may form a corrugated surface as required, as shown in FIG. The upper mold 50 used in combination with the lower mold 51 also has the same shape as the lower mold 51.

When manufacturing the pick brush of the present invention, a reel 6 is provided corresponding to each passage 47 of the fixed mold 41.
0 to synthetic fibers such as polyester or nylon6
2 is pulled out and passed through the passage 47, the conical cavity 46, the cavity 45 and the outlet 52, and the synthetic fiber 62 is placed in the mold. The tips 61 of the fibers 62 may be gripped with a suitable tool as necessary to apply a certain tensile force to the fibers 62. Thereafter, molten resin is injected into the conical cavity 46 and the cavity 45 through the runner 49 and gate 48. As these resins, for example, resins such as polycarbonate or ABS are used.
After the injected resin has solidified, the movable mold 42 is moved, the molded product is taken out while pulling the fibers 62, and the movable mold 42 is moved again.
When 2 is combined with the fixed mold 41, the state shown in FIG. 8 is obtained. In this state, the fibers 62 are again securely held within the cavity 45 in the same state as in FIG. 3 in preparation for the next injection of molten resin, and the fibers 62 are connected to the mold. The fiber 62 is cut by a heat cutter along the plane indicated by the dotted line 63. As described above, in the present invention, the fibers 62 are passed through the passage 47 and the cavity 45, and the movable mold 42 reliably holds the fibers 62, so that the brush can be continuously molded.

In the pick brush manufactured as above, the first
The flocked part 33 and the second flocked part 34 are made of continuous fibers 6.
2, and the fibers are embedded within the body 30.

FIG. 9 shows another embodiment of the pick brush. In this example, a first flocked part 73 is provided on a tapered part 71 formed at one end of the main body 70, and a second flocked part 74 is provided on a substantially right-angled surface 72 formed at the other end. The portion 73 and the second flocked portion 74 are formed of continuous fibers in the same manner as described above. Since the flange 75 is formed on the main body 70, the brush can be used by being attached to the center hole of the holder 25.

Effects of the Invention As described above, in this invention, the first flocking part and the second flocking part
Since the flocked portion is formed of continuous fibers that pass through the main body, it is clear that a complicated resin molding process and flocking process are not required during manufacturing. Furthermore, since metal such as twisted wires is not used, there is no possibility of damaging the gums and teeth during oral cleaning. In addition, as mentioned above, if it is made thin, it can be easily inserted into narrow interdental papillae. Since the bristle parts have different shapes in two places, the taper part and the right angle surface, the bristle parts can be used to match the tooth surfaces of various shapes or the gaps between the teeth, and even between the back teeth can be even more effective by bending the brush. Plaque (teeth moss) can be removed more easily since it can be brushed directly. Of course, the pick brush of the present invention can be used already.

[Brief explanation of drawings]

Fig. 1 is a plan view of the oral cavity cleaning aid according to the present invention; Fig. 2 is a side view thereof; Fig. 3 is a sectional view of the mold; Fig. 4 is an end view of the mold; Fig. 5 is a fixed A perspective view of a part of the mold; Figure 6 is an enlarged view of a part of the mold; Figure 7
The figure is a plan view of the movable mold; Figure 8 is a schematic diagram when the oral cleaning aid is taken out from the mold; Figure 9 is a plan view showing another embodiment; Figure 10 is a conventional oral cleaning aid The top view of the figure is shown. 30,70...Main body, 31,71...Tapered portion, 32,72...Right angle surface, 33,73...First
Flocking section, 34, 74...Second flocking section, 45...Cavity, 46...Conical cavity, 47...Passway, 62...Fiber.

Claims (1)

[Claims] 1. A tapered portion is formed at one end, and
It has an elongated synthetic resin main body with a right-angled surface formed on the other end, and a first and second clay hair part formed on the tapered part and the right-angled surface of the main body, respectively, and the first hair-planted hair part has a The mouth cleaning aid is characterized in that the part and the second flocked part are formed of continuous fibers passing through the main body. 2. A step of disposing fibers in the cavity through a plurality of passages communicating with a conical cavity provided at one end of a cavity formed in the mold, through the cavity and an outlet formed at the other end of the cavity; It is characterized by comprising the steps of injecting molten resin into the cavity, removing the molded product from the mold while moving the fibers, and cutting the fibers protruding from the molded product into a predetermined length. A method for producing an oral cleaning aid.