KR100827549B1 - Interdental brush and method for manufacturing the same - Google Patents

Abstract

An interdental brush and a method for manufacturing the same are provided to improve a productivity by reducing a rejection rate of a product, and to achieve a using safety as well as to offer various chances for a product selection to a user. An interdental brush includes: a brush member(10), of which one end has a wire(12) with a twisted hair(11) which is exposed to the outside, and the other end of which has a deformed part(13) which is extended from the wire; a hollowed head(20), having an inner space for receiving the wire and the deformed part of the brush member, in such a manner that the hair of the brush member is passed through the head so as to be exposed to the outside and the deformed part is located in the inner space; and a handle(30), connected to the head by means of an injection molding method in which a molten material of the handle, that is, a molten synthetic resin is injected into a mold, into which the brush member and the head are fastened, in such a manner that the material wraps a part of the head and is filled into the inner space of the head at the same time.

Description

Interdental toothbrush and its manufacturing method {INTERDENTAL BRUSH AND METHOD FOR MANUFACTURING THE SAME}

1 is a perspective view of an interdental toothbrush according to the present invention,

2 is a cross-sectional view of FIG.

3 is a perspective view of the head of the interdental toothbrush according to the present invention;

4 is a cross-sectional view taken along line AA ′ of FIG. 3;

5 is a cross-sectional view taken along the line B-B 'of FIG.

6 is a view for explaining the process of coupling the brush portion and the head portion of the interdental toothbrush according to the present invention,

Figure 7 is a view for explaining a handle portion forming process of the interdental toothbrush in accordance with the present invention.

<Description of Signs for Main Parts of Drawings>

10: brush portion 11: hair

12 wire 13 deformed portion

20: head portion 21: wire support portion

22: connection part 23: hole in the longitudinal axis direction

24: insertion groove 30: handle portion

40: mold

The present invention relates to an interdental toothbrush and a method of manufacturing the same which can improve productivity by reducing a defective rate of a product and can provide safety to a user.

In general, interdental toothbrushes are used to brush teeth. In particular, it is useful when there is a complex prosthesis or orthodontic appliance in the oral cavity. The interdental toothbrush consists of a columnar handle and a brush attached to the end of the handle.

Looking at the process of manufacturing the interdental toothbrush, the brush is formed separately and then bonded to the handle. Usually, a brush is set in a metal mold | die, and a synthetic resin etc. are injected, and a handle is shape | molded. Then, the brush and the handle are integrally joined to complete the interdental toothbrush.

By the way, in the case of forming the interdental toothbrush in this way, the end wire of the brush is often protruded to the outside of the handle by the pressure of the synthetic resin during injection. Thus, the use caused a risk of injuring the mouth during use. On the other hand, the wire is often seen from the outside of the handle was produced a lot of defects in appearance. Such high defect rates have resulted in expensive products and repeated inefficient processes to dispose of defective products. Therefore, it is natural that productivity will fall.

The present invention has been made to solve the above problems, an object of the present invention is to provide an interdental toothbrush and a method of manufacturing the same which can improve the productivity by reducing the defective rate of the product, and can provide safety in use. .

In addition, another object of the present invention is to provide a user with a variety of choices by varying the material and color of the primary and secondary injection molding products during molding.

In order to achieve the above object, the manufacturing method of the interdental toothbrush according to the present invention,

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At one end there is formed a brush portion having a hair associated with the twisted wires and a deformed portion at the other end of which the wire is extended,

The hollow head part is formed by primary injection molding to expose the hair of the brush part on one side and accommodate the wire and the deformation part inside the brush part,

The hair of the brush part passes through the inside of the head part to be exposed to the outside, and the brush part is assembled so that the deformation part is located inside the head part, thereby fixing the brush part and the head part and placing them in a mold.

It is characterized in that the handle portion is formed by primary injection molding so that the synthetic resin is injected into the mold and the synthetic resin surrounds a part of the head portion and filled in the head portion.

Preferably, the deformable portion of the brush portion is characterized in that some or all of the deformed away from the axial direction of the wire.

Preferably, the same material is used for the first injection molding and the second injection molding.
Preferably, the head portion and the handle portion is characterized in that at least one of the color, gloss, and material are formed differently.

According to the present invention, since the wire does not protrude to the outside of the handle portion, the defective rate of the product can be significantly reduced, it can provide safety to the user.

In addition, according to the present invention, it is possible to provide a beautiful product in appearance by changing the material and color of the resin during the first injection and the second injection molding, it can provide a user with a variety of choice opportunities.

Hereinafter, with reference to the accompanying drawings, preferred embodiments according to the present invention will be described in detail.

1 and 2 show an interdental toothbrush according to the present invention, and FIGS. 3 to 5 show head portions of an interdental toothbrush.

1 and 2, the interdental toothbrush includes a brush portion 10, a head portion 20 for fixing the brush portion 10, and a handle portion 30 extending from the head portion 20. . The brush portion 10, the head portion 20, and the handle portion 30 are disposed coaxially. In the drawing, the brush portion 10 is disposed in front of the head portion 20 and the handle portion ( 30) is arranged.

At one end of the brush part 10, the hair 11 is formed in association with the twisting of the wire 12, and at the other end of the wire 12, the deformation part 13 is bent beyond the longitudinal axis of the wire 12. Is formed. In the present embodiment, the deformable portion 13 has a shape in which the wire 12 is bent, but the shape of the deformable portion 13 is not limited thereto and may be any shape such as a spiral. One end of the brush part 10 with the hair 11 is exposed to the outside, and the other end of the brush part 10 without the hair 11 is inserted into the head part 20. That is, the deformation part 13 is arrange | positioned inside the head part 20. As shown in FIG.

In the head portion 20, holes 23 (see FIG. 3) in the longitudinal axis are formed therein to surround the wire 12 of the brush portion 10. The head part 20 is formed by separate injection molding and may be referred to as a primary injection product, and has a hollow shape such as a substantially cylindrical shape. A part of the head portion 20 is disposed inside the handle portion 30.

The handle part 30 is disposed on the opposite side of the brush part 10 with respect to the head part 20 and surrounds a part of the head part 20. The handle portion 30 is a secondary injection molded product by injection molding of synthetic resin, and since the final molding is performed in the manufacturing process, the synthetic resin is also filled in the hole 23 in the longitudinal direction of the head portion 20.

3 to 5, when looking at the head portion 20, the wire support portion 21 surrounding and supporting the wire 12 of the brush portion 10, and the connection portion 22 coupled to the handle portion 30. It includes. The wire support part 21 and the connection part 22 are provided with the hole 23 which penetrates the inside in the longitudinal direction. In the connecting portion 22, an insertion groove 24 is formed to be enlarged from one point of the hole 23 in the longitudinal axis direction to the end portion.

6 and 7 show the manufacturing process of the interdental toothbrush according to the present invention.

Referring to FIG. 6, the brush part 10 and the head part 20 are separately formed and then coupled to each other. The hair 11 is twisted with the wire 12 to form the brush part 10, and then the wire 12 in the portion without the hair 11 is bent to form the deformation part 13. Thereafter, the brush part 10 is fitted to the already formed head part 20. Insert the part with the hair 11 of the brush part 10 through the insertion groove 24 of the head part 20, and after passing through the hole 23 in the longitudinal direction of the head part 20, the head part ( Go outside of 20). Then, the deformable portion 13 of the brush portion 10 does not pass through the hole 23 in the longitudinal axis, but is positioned in the insertion groove 24. Thus, the brush portion 10 and the head portion 20 are temporarily fixed.

In this state in which the brush unit 10 and the head unit 20 are coupled to each other, referring to FIG. 7, after arranging them in the mold 40, synthetic resin is injected to form the handle unit 30. At this time, since the synthetic resin is also filled in the hole 23 in the longitudinal axis of the head portion 20, the brush portion 10 and the head portion 20 is firmly coupled. In addition, since the handle portion 30 is formed by wrapping the connecting portion 22 of the head portion 20, the interdental toothbrush is more firmly coupled. On the other hand, since the deformation part 13 of the brush part 10 is located only at the connection part 22 of the head part 20, there is no danger of protruding to the outside of the handle part 30.

The head portion 20 and the handle portion 30 may be molded using the same material or different materials. In addition, when forming the head portion 20 and the handle portion 30, the color, gloss, and materials are different from each other to visually distinguish.

As described above, according to the present invention, after inserting and fixing a brush in the head part that is the primary injection molded product, the final product can be obtained by putting it in a mold and injecting it into the secondary.

Thus, productivity can be improved by reducing the defective rate of the product, and can provide safety to the user.

In addition, according to the present invention, it is possible to provide a beautiful product in appearance by changing the material and color of the resin during the first injection and the second injection molding.

As described above, according to the present invention, it is possible to reduce the defective rate of the product to improve productivity, and to provide safety to the user.

In addition, according to the present invention, it is possible to provide a beautiful product in appearance by changing the material and color of the resin during the first injection and the second injection molding, it is possible to increase the value of the product by providing a variety of opportunities for the user have.

Claims (8)

delete delete delete delete One end has a hair 11 associated by twisting the wire 12, and at the other end where the wire 12 extends, a brush portion 10 having a deformable portion 13 is formed. First injection of the hollow head portion 20 to expose the hair 11 of the brush portion 10 on one side, and accommodate the wire 12 and the deformation portion 13 of the brush portion 10 therein. Formed by molding, The hair 11 of the brush part 10 passes through the inside of the head part 20 to be exposed to the outside, and the deformation part 13 of the brush part 10 is inside the head part 20. After assembling so that the brush portion 10 and the head portion 20 is fixed to them, they are placed in the mold 40, By injecting the synthetic resin into the mold 40, the handle 30 is formed by secondary injection molding so that the synthetic resin surrounds a part of the head portion 20 and is filled in the head portion 20. Interdental toothbrush manufacturing method to use. 6. Method according to claim 5, characterized in that the deformable portion (13) of the brush portion (10) is partially or entirely deformed away from the axial direction of the wire (12). The interdental toothbrush manufacturing method according to claim 5 or 6, wherein the same material is used for the first injection molding and the second injection molding. 7. The method of claim 5 or 6, wherein the head portion (20) and the handle portion (30) are different from each other in at least one of color, gloss, and material.

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