WO2021012069A1

WO2021012069A1 - Fixing structure of toothbrush head and fixing method therefor

Info

Publication number: WO2021012069A1
Application number: PCT/CN2019/096655
Authority: WO
Inventors: 黄守仁
Original assignee: 龙昌兄弟股份有限公司
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2021-01-28

Abstract

The toothbrush in the present invention comprises a toothbrush handle and a toothbrush head. The toothbrush handle comprises a handle body and a head located on one end of the handle body. The toothbrush head comprises a head piece and a plurality of bristles disposed thereon. A fixing adhesive is provided between the head piece and the head so as to fix the toothbrush head at the head to improve the conventional ultrasonic welding approach or viscose approach to fix the toothbrush head instead of fixing the toothbrush head by means of a second injection of a soft fixing adhesive, which can improve the stability of combining the toothbrush head into the toothbrush handle.

Description

Fixing structure of toothbrush head and fixing method thereof

Technical field

The invention relates to a fixing structure of a toothbrush head and a fixing method thereof for enhancing the stability of the combination of the brush head and the handle.

Background technique

The cleaning of the oral cavity is closely related to the health of the human body. People often use tools such as toothbrushes, mouthwashes and dental floss to clean the oral cavity. Among them, because of the convenience of the toothbrush, the basic tool for maintaining oral hygiene, the bristles of the toothbrush can conform to the teeth. Curvature is used to extend into the interdental area between the teeth to clean the residual food in the interdental space, and to avoid the growth of bacteria in the mouth due to food residues, so as to maintain oral hygiene and reduce the occurrence of oral diseases.

A general toothbrush includes a handle and a plurality of bristles, and the handle has a head, and the head has many pores. In the conventional toothbrush structure, the bristles are directly implanted in the head of the handle, or the bottom section of the bristles is preformed After a metal piece is clamped and fixed, it is placed in the head of the handle; or the bottom section of the bristles is melted and fixed to a substrate by heat, and then placed in the head of the handle, such as the invention patent No. I558343 of Taiwan Province of China; After the above-mentioned bristles are clamped to the metal sheet or thermally welded to the substrate, they must be inserted and fixed to the head of the brush handle by a fixing structure. The conventional fixing techniques include thermal welding or ultrasonic welding, such as thermal fusion, melting Any fusion technology, tight-fitting assembly, coupling sleeve, threaded engagement, adhesion, or fasteners, etc., such as invention patent No. I576068, No. I548363 of Taiwan Province of China.

Summary of the invention

In view of this, the present invention provides a fixing structure of a toothbrush head that enhances the stability of the combination of the head and the handle of the toothbrush, which is its main purpose.

The toothbrush of the present invention includes a brush handle and a brush head, the brush handle has a handle body and a head set at one end of the handle body, the brush head has a head piece and a plurality of bristles set on the head piece; wherein, A fixing gel is arranged between the head piece and the head to fix the brush head to the head, so as to improve the conventional ultrasonic welding method or glue method to fix the brush head.

According to the above technical features, the fixing gel is a thermoplastic elastomer (TPE).

According to the above technical features, the contact surface between the head chip and the fixing gel has at least one opposite first interference portion and second interference portion.

According to the above technical features, there is at least one opposite third interference portion and fourth interference portion between the contact surface of the head and the fixing gel.

According to the above technical features, the head piece has opposite first and second surfaces, side surfaces connecting the first and second surfaces, and a plurality of pores, the pores are closed on the second surface, and the fixing gel is provided Between the outer periphery of the second surface of the head piece and the head, the fixing glue is provided with a side wall extending on the side surface.

According to the above technical features, the fixing glue has a ring-shaped surrounding edge formed by the side wall, and a convex portion extending inward from the ring-shaped surrounding edge. The convex portion is relatively deep into the second surface. The periphery.

According to the above technical features, the head piece has opposite first and second surfaces, side surfaces connecting the first and second surfaces, and a plurality of pores that pass through the first and second surfaces, and the fixing gel is disposed on the head Between the second surface of the sheet and the head, and the fixing glue is provided with a side wall extending on the side surface.

According to the above technical features, a spacer is further provided between the head piece and the fixing gel, the spacer is a straight structure, and the spacer covers the second surface.

According to the above technical features, the contact surface of the head and the spacer has at least one opposite first positioning portion and second positioning portion.

According to the above technical features, the brush handle has at least one perforation penetrating through an upper surface and a lower surface thereof, and the fixing gel is provided with a filling part for filling the perforation.

According to the above technical features, at least one side of the filling portion is exposed on the upper surface or the lower surface.

The present invention also provides a method for fixing a brush head at least including the following steps: providing a brush handle having a handle body and a head set at one end of the handle body; providing a brush head having a head And a plurality of bristles arranged on the head piece, the brush head is placed on the head; a fixed colloid is formed, and the fixed colloid is formed between the head piece and the head by injection molding to make the brush The head is fixed to the head.

Description of the drawings

Figure 1 is a perspective view of the toothbrush of the present invention.

Figure 2 is an exploded view of the toothbrush structure of the present invention.

Fig. 3 is a cross-sectional view showing the structure of the toothbrush of the present invention.

Fig. 4 is a structural perspective view of the toothbrush of the present invention from another perspective.

Figure 5 is a schematic flow chart of the method for fixing the toothbrush head in the present invention.

Fig. 6 is a schematic diagram showing the structure of placing the brush head on the head in the present invention.

Fig. 7 is a schematic diagram showing another structure of placing the brush head on the head in the present invention.

Figure 8 is a cross-sectional view of another structure of the toothbrush of the present invention.

Drawing number description:

Steps S01, S02, S03, S04

Space P

Toothbrush 1

Brush handle 10

Shank 11

Head 12

Upper surface 13

Lower surface 14

Perforation 15

Brush head 20

Head piece 21

First surface 211

Second surface 212

Side 213

Pores 214

Fixed colloid 30

Sidewall 31

Convex 32

Filling part 33

The first interference part 41

Second interference part 42

The third interference part 43

The fourth interference part 44

First positioning part 45

Second positioning part 46

Separator 50

Bristles 60

Detailed ways

1 is a perspective view of the toothbrush structure of the present invention. The toothbrush 1 of the present invention includes a brush handle 10 and a brush head 20. The brush handle 10 has a handle body 11 and a handle disposed at one end of the handle body 11. The head 12, the brush head 20 has a head piece 21 and a plurality of bristles 60 arranged on the head piece 21.

Please refer to FIGS. 2 and 3 at the same time. The head piece 21 has opposite first and

second surfaces

211, 212, a side surface 213 connecting the first and

second surfaces

211, 212, and a plurality of pores 214. The pores 214 are closed on the second surface 212, the plurality of bristles are fixed to the planting hole 214, and the upper section of the plurality of bristles is exposed above the first surface 211.

The key point of this case is that a fixing glue 30 is provided between the head piece 21 and the head 12 to fix the brush head 20 to the head 12. The fixing glue 30 can be a Thermoplastic elastomer (TPE) Material; and in the embodiment shown in the figure, the fixing gel 30 may have an annular body and is disposed between the periphery of the second surface 212 of the head piece 21 and the head 12, and the The fixing glue 30 is provided with a side wall 31 extending on the side surface 213 to increase the stability of the combination of the head piece 21 and the fixing glue 30; wherein, the fixing glue 30 has a ring surrounded by the side wall 31 The convex ring 32 extends inwardly of the ring-shaped surrounding edge. The convex ring 32 is relatively deep into the outer periphery of the second surface 212, and the side wall 31 extends to the head 12 Side.

Furthermore, the contact surface of the head piece 21 and the fixing gel 30 has at least one first interference portion 41 and a second interference portion 42 opposite to each other, and the first and

second interference portions

41, 42 are engaged with each other, The bonding strength of the head piece 21 and the fixing gel 30 can be increased; alternatively, the contact surface of the head 12 and the fixing gel 30 has at least one opposite third interference portion 43 and fourth interference portion 44, and the first 3. The engagement of the

fourth interference portions

43, 44 with each other can increase the bonding strength of the head 12 and the fixing gel 30; in addition, the handle 10 has at least one penetrating through an upper surface 13 and a lower surface 14 The perforation 15 is provided, and the fixing gel 30 is provided with a filling portion 33 filled in the perforation 15, at least one side of the filling portion 33 is exposed on the upper surface 13 or the lower surface 14. Please also refer to FIG. 4, Even the filling portion 33 can extend toward the upper surface 13 or the lower surface 14. The filling portion 33 penetrates the through hole 15 of the brush handle 10 to increase the combination of the brush handle 10 and the fixing gel 30 strength. In the above-mentioned embodiment, the first and

second interference portions

41, 42 or the third and

fourth interference portions

43, 44 may be opposite convex or concave structures.

As shown in Figure 5, the method for fixing the toothbrush head of the present invention includes at least the following steps:

Step S01: Provide a brush handle. Please refer to FIG. 2 at the same time. The brush handle 10 has a handle body 11 and a head 12 disposed at one end of the handle body 11; one of the manufacturing methods of the brush handle is injection molding It is made by injection molding technology to inject liquid plastic into a first mold. The first mold is a mold corresponding to the shape of the brush handle 10 shown in FIG. 2. After the liquid plastic is cooled and solidified, it will be formed as shown in the figure. Show the brush handle 10.

Step S02: Provide a brush head 20. The brush head 20 has a head piece 21 and a plurality of bristles arranged on the head piece 21. The head piece 21 has a plurality of bristles 214 for fixing the plurality of bristles; wherein, a bristles can be used Machine, the plural bristles are respectively implanted into the bristles 214 of the head piece 21 to form a bristle part on the brush head 20, and then the plural bristles are shaped by hot melt, and the plural bristles are located above the first surface 211 of the head piece 21 At the same time, one end of the plurality of bristles protruding from the second surface 212 of the head piece 21 and the corresponding bristles 214 are heated and then cooled and then shaped separately, so that the plurality of bristles protrude from the second surface 212 One end is melted so that the plural bristles are respectively fixed on the second surface 212 of the head piece 21, and the upper section of the plural bristles is exposed above the first surface 211 to form a bristle part.

Step S03: Place the brush head 20 on the head 12; please refer to the embodiment shown in FIG. 6 at the same time, a second mold design can be used to provide a space between the brush head 20 and the head 12 P.

Step S04: A fixed colloid 30 is formed, and the liquid plastic is injected into a second mold by injection molding. The second mold is a mold corresponding to the shape of the fixed colloid 30 shown in FIG. 2. After the liquid plastic is cooled and solidified That is, the fixing gel 30 as shown in the figure is formed, and the liquid plastic can be injected into the space P at the same time, so that the fixing gel 30 is arranged between the head piece 21 and the head 12, and the brush head 20 can be fixed On the head 12, the fixing of the brush head is completed.

The invention utilizes the setting of the fixed colloid to improve the conventional ultrasonic welding method or the glue method to fix the brush head, increase the bonding strength of the brush head and the brush handle, and strengthen the stability of the brush head and the brush handle.

In another embodiment as shown in Figs. 7 and 8, the pores 214 of the head piece penetrate through the first and

second surfaces

211, 212, so that the liquid plastic overflows to the first and

second surfaces

211 and 212 during injection molding. On the surface 211, a spacer 50 can be placed on the upper surface 13 of the head 12 first in step S03. The contact surface of the head 12 and the spacer 50 has at least one opposite first positioning portion 45 and Two positioning parts 46, so that the spacer 50 can use the first and

second positioning parts

45, 46 to achieve positioning, and then place the brush head 20 on the spacer 50; wherein, the spacer 50 is a flat A straight structure, and the spacer 50 covers the second surface 212, which can seal the plurality of bristles and the plurality of pores 214 exposed on the second surface 212, which can avoid the subsequent use of injection molding to make a fixed gel. It overflows to the first surface 211; and uses the functions of the first and

second positioning portions

45 and 46 to provide a space P between the spacer 50 and the head 12. In the above-mentioned embodiment, the first and

second positioning portions

45 and 46 may be opposite convex and concave structures. After that, the subsequent step S04 is used to form a fixing gel 30 in the space P, so that the fixing gel 30 is disposed between the head piece 21 and the head 12, and the brush head 20 can be fixed to the head 12. Then the fixing of the brush head is completed.

Claims

A fixing structure for a toothbrush head. The toothbrush includes a handle and a head. The handle has a handle body and a head set at one end of the handle body. The brush head has a head piece and a head set on the head. The plural bristles of the sheet are characterized by:

A fixing gel is arranged between the head piece and the head to fix the brush head to the head.
8. The fixing structure of the toothbrush head of claim 1, wherein the fixing gel is a thermoplastic elastomer.
5. The fixing structure of the toothbrush head of claim 1, wherein the contact surface of the head piece and the fixing gel has at least one opposite first interference portion and second interference portion.
3. The fixing structure of the toothbrush head of claim 1, wherein the contact surface of the head and the fixing gel has at least one opposite third interference portion and fourth interference portion.
The fixing structure of the toothbrush head according to any one of claims 1 to 4, wherein the head piece has opposite first and second surfaces, side surfaces connecting the first and second surfaces, and a plurality of pores. The pores are closed on the second surface, the fixing glue is arranged between the outer periphery of the second surface of the head piece and the head, and the fixing glue is provided with a side wall extending from the side surface.
The fixing structure of the toothbrush head of claim 5, wherein the fixing gel has a ring-shaped peripheral edge surrounded by the side wall, and a convex portion extending inward from the ring-shaped peripheral edge, the convex ring The part is relatively deep into the periphery of the second surface.
5. The fixing structure of the toothbrush head of claim 5, wherein the handle has at least one perforation penetrating through an upper surface and a lower surface thereof, and the fixing gel is provided with a filling portion filling the perforation.
7. The fixing structure of the toothbrush head according to claim 7, wherein at least one side of the filling part is exposed on the upper surface or the lower surface.
The fixing structure of the toothbrush head according to any one of claims 1 to 4, wherein the head piece has opposite first and second surfaces, side surfaces connecting the first and second surfaces, and a plurality of penetrating through the first and second surfaces. The pores of the second surface are planted, the fixing glue is arranged between the second surface of the head piece and the head, and the fixing glue is provided with a side wall extending on the side surface.
The fixing structure of the toothbrush head of claim 9, wherein a spacer is further provided between the head piece and the fixing gel, the spacer is a straight structure, and the spacer covers the second surface.
10. The fixing structure of the tooth brush head of claim 10, wherein the contact surface of the head and the spacer has at least one opposite first positioning portion and second positioning portion.
A method for fixing the head of a toothbrush is characterized in that it comprises at least the following steps:

Provide a brush handle, the brush handle has a handle body and a head set at one end of the handle body;

Providing a brush head with a head piece and a plurality of bristles arranged on the head piece;

Place the brush head on the head;

A fixed gel is formed, and the fixed gel is formed between the head piece and the head by an injection molding method to fix the brush head to the head.