JPS6137153A - Oral cavity cleaning auxiliary instrument and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an oral cavity cleaning aid, 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 OF THE INVENTION There are nine different 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 adequately with a toothbrush. In other words, in the oral cavity, about 3 minutes after eating 9 meals, acid is generated due to decomposition of food particles, and this acid decomposes tooth enamel.

This acid is generated when sugars and starches contained in food particles adhering to teeth are fermented and decomposed by bacteria during the day.9
Even if you clean your teeth with toothpicks after meals, food particles may not be completely removed, leading to plaque formation. Therefore, originally, before acid generation,
That is, it is desirable to clean the inside of the oral cavity immediately after eating a meal, but in daily life it is actually difficult to clean it with a toothbrush immediately after eating nine meals. For this reason, an oral cavity cleaning aid shown in FIG. 10 was developed. This oral cleaning aid is commonly referred to as an interdental brush, and has 9 synthetic resin bodies 2
A tapered portion 21 is formed at one end of the 0. An end portion of a thin twisted wire 22 is embedded in the tip of the tapered portion 21, and nine synthetic resin fibers 23 are flocked to the wire 22 over almost its entire length, forming 127 portions 24.

This big brush is inserted into the center hole 26 of the holder 25 as needed and used for cleaning the teeth. It can also be carried by attaching it to the hole 26.

However, this is not very desirable from a hygienic point of view.

However, since the above-mentioned conventional intertent tarp 2 uses hard twisted wires, teeth or gums may be damaged during use, and the manufacturing method involves embedding the ends of the twisted wires in the resin body 20 and implanting fibers. The wire 22 requires a complicated resin molding process and flocking process, and is not suitable for continuous production.Furthermore, the wire 22 has a minimum diameter of 1.2 mm, which makes it difficult to insert the wire smoothly between the teeth. In the end, it was not suitable for interdental cleaning.

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

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

FIGS. 1 and 2 show an oral cleaning aid of the present invention called a Bic brush. This brush has an elongated synthetic resin main body 30'f, which has 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 formed on the right-angled surface 32. The first flocking section 31 is.

In the tapered part 31, the fibers 35 protrude from the main body in a spiral manner, whereas in the second flocked part, the fibers 36 protrude from the main body in a straight line. A recess 37f can be formed in the main body 30 at an appropriate position as desired. By bending the main body 30 in the recess, the angle of each bristle part can be arbitrarily adjusted according to the surface of the tooth to be cleaned.

The first flocking part 33 and the second flocking part 34 are 9 as described below.
It is formed of continuous fibers passing through the body 30. That is,
The middle part of the fiber is resin molded, and both ends of the fiber are molded with a resin.
and forming a second flocked part.

FIG. 3 shows a mold 40 for molding a big brush. This mold 40 is expressed with one dimension omitted, 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, and 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 two-conical cavity 46, and a launch 49 communicating with this gate 48. In order to form the four parts 37 in the big brush, a convex part 49 is formed in the cavity 45, but for this reason, the fixed mold 41 has two parts.
It will be a split type. However, if the recessed portion 37'J&: is not formed, it is not necessary to use a split type.

As shown in FIG. 4, the movable mold 42 consists of an upper mold 50 and a lower mold 51, and an outlet 52 is formed approximately in the center thereof. As shown in FIGS. 6 and 7, the lower mold 51 is formed with a hole 53 that communicates with the outlet 52 and accommodates the end of the fixed mold 41. The outlet 52 may form a corrugated surface, as shown in FIG. 6, if desired. 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 big brush of the present invention, the synthetic fibers 62 such as polyester or nylon are drawn out from the holes 60 provided corresponding to each passage 47 of the fixed mold 41.
The synthetic fiber 62 is placed into the mold by passing through the conical cavity 46, the cavity 45 and the outlet 52. 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. These resins may be 9 e.g. polycarbonate or A
A resin such as BS is used. After the injected resin has solidified, the movable mold 42 is moved and the molded product is taken out while pulling the fibers 62. When the movable mold 42 is recombined with the fixed mold 41, the state shown in FIG. 8 is obtained. In this state, the fibers 62 are again securely held in 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 in the plane indicated by the dotted line 63. As described above, in the present invention, the fibers 62 are passed through the nine passages 47 and the cavity 45, and the fibers 62 are securely held by the movable mold 42, so that the brush can be continuously formed.

In the big flage manufactured as described above, the first flocked part 3
3 and the second flocked portion 34 are formed of continuous fibers 62,
This fiber is embedded in the nine body 30.

FIG. 9 shows another embodiment of the pick brush.

In this example, a tapered portion 71 formed at one end of the main body 70
A first flocked part 73 is provided at the other end, and a second flocked part 74 is provided on a substantially right-angled surface 72 formed at the other end. Made of continuous fibers. The main body 70 has 7 lunges 7
5, 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 flocked part and the second flocked part are formed of continuous fibers that pass through the main body, so a complicated resin molding process and flocking process are not required during manufacturing. is clear.

Furthermore, since metal such as twisted wires is not used, there is no possibility of damaging the gums and teeth during oral cavity cleaning.

In addition, as mentioned above, if it is made thin, it can be easily inserted into narrow interdental papillae. Since the bristles are formed in two different shapes on the tapered part and the right angle surface, the bristles can be used to suit screens of 9 different shapes or gaps between the teeth, and are even more effective when brushing between the back teeth by bending the brush. Of course, the pick brush of the present invention can be used already.

[Brief explanation of the drawing]

Figure 1 is a plan view of the oral cavity cleaning aid according to the present invention; Figure 2 is a side view thereof; Figure 3 is a sectional view of the mold; Figure 4 is an end view of the mold; Figure 5 is a fixed A perspective view of a part of the mold; Fig. 6 is an enlarged view of a part of the mold; Fig. 7 is a plan view of the movable mold; Fig. 8 is a schematic diagram when taking out the oral cleaning aid from the mold; The figure is a plan view showing another embodiment; FIG. 10 is a plan view of a conventional oral cleaning aid. 30, 70...Main body, 31.71...Tapered portion, 32.72...Right angle surface, 33.73...
First flocking part, 34.74... Second flocking part, 45
...Cavity, 46...Conical cavity. 47... Passage, 62... Fiber Figure 1 Figure 3 Figure 4 Figure 5 Figure 8

Claims (2)

[Claims] (1) An elongated synthetic resin main body having a tapered portion formed at one end and a right-angled surface formed at the other end; a first flocked portion formed on each of the tapered portion and the right-angled surface of the main body; an oral cavity cleaning aid comprising a second bristled part, the first bristled part and the second bristled part being formed of continuous fibers passing through the main body. (2) disposing the fibers in the cavity through a plurality of passages communicating with the mold cavity, the cavity and an outlet formed at the end of the cavity; injecting molten resin into the cavity; A method for manufacturing an oral cleaning aid, comprising the steps of: removing the molded product from the mold while moving the fibers; and cutting the fibers protruding from the molded product into a predetermined length.