JPH06304021A - Tooth brush - Google Patents

Abstract

PURPOSE:To achieve higher economy and a saving of resources by providing a tooth brush which allows partial exchange of bristles for repeated use when the creep thereof occurs while minimizing a part to be discarded in the exchange. CONSTITUTION:A recess part 24 having a retaining protrusion 25 on a circumferential rim thereof is formed at a head part 23 of a grip 20 while bristles 40 are planted on a thin plate-shaped bristle base material 31 allowed to be fitted into the recess part 24 free to load or unload to form a bristle-planted part 30. The bristle-planted part 30 can be used wish the bristle-planted base material 31 fitted into the recess part 24. This also allows the exchange of the bristle- planted part 30 as a whole for use again when the creep of the bristles 40 occurs and in other cases.

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 which can be repeatedly used by replacing a bristle-implanted portion on which a brush is planted.

[0002]

2. Description of the Related Art In a toothbrush, when the brush is worn out, the tips of the brush expand and it is difficult to brush the tooth properly. For this reason, the toothbrush is judged to have reached the end of its life when it has set, and replacement is recommended. However, when replacing the toothbrush, not only the brush but also the entire handle must be replaced, and there are many discarded parts such as resin when replacing, improving from an economical point of view and resource saving point of view. Was requested.

Therefore, in order to improve economy and the like, there has conventionally been proposed a toothbrush capable of exchanging a head portion on which a brush is planted. In this toothbrush, the head part on which the brush is planted is detachably separated from the handle part by the neck part, etc., and when the brush is worn out, only the head part can be replaced and used again. is there.

[0004]

However, in the above-mentioned conventional toothbrush, since the head part and the handle part are separated by the neck part, the entire head part must be replaced at the time of replacement and is discarded. There are still many resin parts, and improvements in economic efficiency have not yet been satisfactory. Further, the toothbrush is required to have a structure in which not only the axial force but also the rotational force is applied to the neck and the like when brushing teeth, and the separated portion can withstand the above force while maintaining the flexibility of the neck. For this reason, there is a problem that the structure of the neck portion becomes complicated, the attaching / detaching operability is deteriorated, and the manufacturing cost is increased. The present invention has been made in view of the above problems, and an object of the present invention is to provide a toothbrush that can be further improved in economical efficiency and the like, has excellent detachability, and can be manufactured at low cost.

[0005]

In order to achieve the above object, the present invention provides a toothbrush having a brush-implanted portion in a head portion which is continuous with a handle portion, wherein the brush-implanted portion is a plate-shaped implant base material. The bristles were formed by flocking, and the head part was formed with a fitting part to which the bristles can be attached and detached.

[0006]

According to the toothbrush according to the present invention, when the brush is sagging, it is sufficient to replace only the flocked portion formed by flocking the bristles on the thin-walled flocked base material, and the portion to be discarded is discarded. It can be extremely reduced, and the economical efficiency can be improved. Then, it suffices to form a fitting portion for fixing the flocked base material on the head part, and the flocked base material can be firmly fixed with a simple structure,
It is easy to replace and can be manufactured at low cost.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a toothbrush according to an embodiment of the present invention, FIG. 1 is an exploded perspective view of the toothbrush, FIG. 2 is an explanatory view of the toothbrush in a detached state, and FIG. 3 is a front view of main parts.

In the figure, 10 represents a toothbrush, and toothbrush 1
0 has a handle 20 and a flocked portion 30, and the handle 2
The hair-implanted portion 30 is detachably and replaceably assembled to the No. 0. The handle 20 has a substantially rod shape, and is configured by integrally forming a grip portion 21, a neck portion 22, and a head portion 23 by injection molding of a resin such as polypropylene. The grip portion 21 has a shape and thickness that are easy to grip, the neck portion 22 is formed into a thin and easily bent shape, and the head portion 23 is formed into a rectangular plate shape.

As shown in FIG. 2, the head portion 23 is provided with a concave portion (fitting portion) 24 that opens to the front surface side (the lower surface in FIG. 2) corresponding to the bristle implant portion 30, and the concave portion. Locking protrusions 25 are formed on both side edge portions of 24, respectively.
The recess 24 has a rectangular shape with a flat bottom surface, and the locking projection 25 is flush with the surface of the head portion 23.
Extend up to 4. As will be described later in detail, the bristle portion 30 is fitted in the recess 24, and the locking projection 25 is locked to the bristle portion 30 fitted in the recess 24 to hold the bristle portion 30 in the recess 24.

As shown in FIG. 3, the flocked portion 30 has a brush 40 on a surface (lower surface in FIG. 3) of a thin plate-shaped flocked base material 31 and a plurality of bristles 41 (see FIG. 16 described later). The hair is bundled and flocked, and an adhesive sheet 32 that can adhere to the bottom surface of the recess 24 is attached to the back surface. The flocked base material 31 is formed in a substantially rectangular shape corresponding to the opening shape of the recess 24 so that it can be fitted into the recess 24. In this flocked portion 30, the flocked base material 31 is fitted in the recess 24, and the locking projection 25 is held in contact with the front surface side in this fitted state.

The flocked portion 30 is shown in FIG. 16 and FIG.
The brush 40 is planted as shown in FIG. First, in the method shown in FIG. 16, the bristles 40 are bundled in a bunch of hairs 41, and the root portion of the bunch of hairs 41 is heated and fused so as to form a thin plate-shaped fused portion 41a. Then, the hair bundle 41 having the fused portion 41a at its root is placed in the molding die of the flocked base material 31, and the molten resin is injected into the molding die to mold the flocked base material 31 and at the same time, The fusion zone 41a is fixed, that is, insert-molded.

Further, in the method shown in FIG. 17, the root portion of the hair bundle 41 of the brush 40 is fused so as to form a hemispherical fused portion 41b in advance, and the flocked substrate 31 is surface-fused. The recess 51c is formed at the proper position. And the hair bundle 41
The fused root portion is put into the recess 51c of the flocked base material 31, and in this state, the heater 52
To heat and bond the root portion of the hair bundle 41 to the flocked base material 31.

Further, in the flocking method shown in FIG. 18, a flocked hole 51d is formed in the flocked base material 31 at a position where flocked bristles 41 should be flocked, and the root portion of the bristled bunch 41 of the brush 40 is placed in the back side of the flocked hole 51d. The root portion of the hair bundle 41 is heated by the heater 52 and melted until it penetrates to the side. At this time, if the root portions of the hair bundles 41 are melted to such an extent that they are fused and adhered to each other, the hair bundles 41 can be reliably prevented from coming off.

Further, in the method shown in FIG. 19, the surface portion 92a of the flocked base material 31 is previously formed, and the flocked hole 51d is formed in the surface portion 92a in the same manner as in FIG. After passing the bundle 41 so as to penetrate to the back surface side, a molten resin is poured into the back surface side of the front surface portion 92a to form the back surface portion 92b, and at the same time when the back surface portion 92b is formed, the root of the hair bundle 41 is formed by the poured resin. Stick parts together.

In this embodiment, the bristle-implanted portion 30 having the brush 40 is planted is the concave portion 2 of the head portion 23 of the handle 20.
4 is detachably attached to the brush 40, so that even if the brush 40 is worn out or the like, the entire bristles 30 can be replaced and repeatedly used. Further, since the flocked part 30 is configured by flocking the brush 40 on the thin flocked base material 31, even when the used flocked part 30 is discarded, the amount of resin to be discarded is extremely small and the economical efficiency is improved. It is possible and resource saving can be achieved.

Further, in this embodiment, the flocked portion 30
In the assembled state of the flocked part 30, the flocked base material 31 of the flocked part 30 is fitted into the recessed part 24 of the head part 23 of the handle 20 to prevent displacement within the extension plane of the handle 20, and the adhesive sheet 32 is It adheres to the bottom surface of the recess 24, and the surface of the flocked base material 31 is further suppressed by the locking projection 25. Therefore, the displacement that comes out of the recess 24 is prohibited,
The brushed portion 30 does not displace with respect to the head portion 23 when brushing teeth, and thus tooth brushing can be performed comfortably.

When the flocked part 30 is attached to the head part 23, as shown in FIG. 2, the flocked part 30 is elastically deformed so that the flocked base material 31 is concave on the adhesive sheet 32 affixing surface side, and the flocked substrate is formed. The flocked part 30 can be attached to the head part 23 by making both ends of the material 31 dive inside the locking projection 25, and also in the case of removal, the flocked base material 31 is elastically deformed similarly and taken out from the recess 24. be able to.
Therefore, the flocked part 30 can be easily attached and detached.

4 to 6 show a toothbrush according to a second embodiment of the present invention. FIG. 4 is an exploded perspective view of the toothbrush, FIG. 5 is a partially sectional front view, and FIG. 6 is a perspective view of main parts. It is a figure. In the second embodiment and the embodiments to be described later, the same parts as those in the above-mentioned first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the second embodiment, a through hole 24a is formed at the bottom of the recess 24 in the head portion 23 of the handle 20, and
A storage hole 21a that opens at the end of the grip 21 is formed, and a pin P for removal is inserted and held in the storage hole 21a.

According to the second embodiment, when the hair-implanted portion 30 is removed from the recess 24, the pin P taken out from the storage hole 21a can be inserted into the through hole 24a and the holding plate 31 can be pushed out. Therefore, the flocked part 30 can be easily removed and is excellent in handling.

7 to 9 show a toothbrush according to a third embodiment of the present invention. FIG. 7 is an exploded perspective view, FIG. 8 is a front view, FIG. 9a is a perspective view of main parts, and FIG. 9b is the same part. FIG. In the third embodiment, eight spherical locking projections 28 are formed on the peripheral edge of the recess 24 of the head portion 23 of the handle 20, the fitting holes 24c are formed on the bottom surface of the recess 24, and the flocked portion 30 is formed. On the back side, a fitting claw 39 is formed in parallel with the adhesive sheet 32 so as to be fitted into the fitting hole 24c.

Two locking projections 28 are provided at the tip end of the recess 24 (for convenience, 28a), two at the end of the recess 24 on the neck 22 side (28b), close to the tip ends of both side edges. Two pieces (28c) are arranged respectively, and the locking projections 28c on the side edges and the locking projections 28b on the end edges on the neck 22 side are largely separated. The fitting hole 24c is formed between the locking protrusions 28b and 28c in the vicinity of the end edge on the neck 22 side.

In the third embodiment, the bristle implanting portion 30 is held even when the locking claws 39 are fitted into the fitting holes 24c, so that the bristle implanting portion 30 is more firmly fixed to the head portion 23 and the tooth brushing is performed. It can be surely prevented from falling off. And the flocked part 3
When attaching 0, as shown by the arrow in FIG. 8, it can be attached by inserting the end portion of the flocked base material 31 obliquely from between the locking projections 28b and c, and when removing the flocked portion 30, The fitting claw 39 fitted into the fitting hole 24c can be pushed out from the back surface side. Therefore, as in the second embodiment described above, the flocked part 30 can be easily attached and detached.

10 to 13 show a toothbrush according to a fourth embodiment of the present invention, FIG. 10 is an exploded perspective view, and FIG.
1 is a front view, FIG. 12 is a cross-sectional view of the head portion, FIG. 13a is a cross-sectional view of the hair-implanted portion, and FIG. 13b is a perspective view of the hair-implanted portion.
In the fourth embodiment, a concave portion 31c having an elliptical shape in plan view is formed on the back surface of the flocked base material 31, and the concave portion 3 is further formed.
A fitting protrusion 31d is formed on the side wall of 1c over the entire circumference.

Further, the head portion 23 is provided with a convex portion (fitting portion) 29 having a substantially elliptical shape in a plan view, integrally or by adhesion, and the above-mentioned fitting protrusion 31d is provided on the side peripheral surface of the convex portion 26.
The fitting groove 29d corresponding to is formed.

In the fourth embodiment, the flocked portion 30 has the concave portion 31c of the plate member 31 fitted to the convex portion 29 of the head portion 23 and the fitting protrusion 31d fitted to the fitting groove 29d. And is fixed to the head portion 23. Further, even in the fourth embodiment, the flocked part 30 can be detached and replaced.

14 and 15 show a toothbrush according to a fifth embodiment of the present invention. FIG. 14 is an exploded perspective view, FIG. 15a is a sectional view of a hair-implanted portion, and FIG. 15b is a perspective view of the hair-implanted portion. . In the fifth embodiment, in addition to the above-described fourth embodiment, a hooking portion 31e for removal is integrally provided at one end of the flocked base material 31 of the flocked portion 30.

In the fifth embodiment, when the hair-implanted portion 30 is to be removed from the head portion 23, the hooked portion 31e can be grasped or the hooked portion 31e can be hooked on an appliance to be removed, so that the attachment / detachment is easy. .

In the fourth and fifth embodiments described above, the convex portion 29 having the fitting groove 29d on the side surface of the head portion 23 and the fitting protrusion 31d on the side surface of the flocked base material 31 of the flocked portion 30. Although the concave portions 31c having the above are formed and these are fitted to each other, the fitting between the convex portions 29 and the concave portions 31c can be achieved by other fitting, for example, dovetail fitting.

[0030]

As described above, according to the toothbrush according to the present invention, the brush is flocked to the flocked base material having a thin plate shape to form the flocked part, and the flocked part is replaceable with the head part. When the toothbrush is worn out, the toothbrush can be used repeatedly by simply replacing the bristle implant, and high economic efficiency can be achieved. In addition, the amount of waste at the time of replacement can be minimized and resource saving can be achieved. .

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a toothbrush according to a first embodiment of the present invention.

FIG. 2 is a front view of the toothbrush.

FIG. 3 is a front view of a bristling part of the toothbrush.

FIG. 4 is an exploded perspective view of a toothbrush according to a second embodiment of the present invention.

FIG. 5 is a front sectional view of the toothbrush.

FIG. 6 is a perspective view of a bristling part of the toothbrush.

FIG. 7 is an exploded perspective view of a toothbrush according to a third embodiment of the present invention.

FIG. 8 is a partially sectional front view of the toothbrush.

FIG. 9A is a perspective view of a bristling part of the toothbrush, and b is a front view of the bristling part.

FIG. 10 is an exploded perspective view of a toothbrush according to a fourth embodiment of the present invention.

FIG. 11 is a front view of the toothbrush.

FIG. 12 is a cross-sectional view of the head portion of the toothbrush.

FIG. 13A is a front sectional view of a bristle implant part of the toothbrush, and b is a perspective view of the bristle implant part.

FIG. 14 is an exploded perspective view of a toothbrush according to a fifth embodiment of the present invention.

FIG. 15A is a front cross-sectional view of a bristle implant part of the toothbrush, and b is a perspective view of the bristle implant part.

FIG. 16 is a schematic diagram for explaining one aspect of a method for implanting a brush in the toothbrush according to the present invention.

FIG. 17 is a schematic diagram for explaining another aspect of the method for implanting a brush in the toothbrush according to the present invention.

FIG. 18 is a schematic diagram for explaining still another aspect of the brush-implanting method in the toothbrush according to the present invention.

FIG. 19 is a schematic diagram for explaining still another aspect of the method for implanting a brush in the toothbrush according to the present invention.

[Explanation of symbols]

 10 Toothbrush 20 Handle 21 Grasping part 22 Neck part 23 Head part 24 Recessed part (fitting part) 24a Through hole 25, 28a, 28b, 28c Locking projection 29 Convex part (fitting part) 29d Fitting groove 30 Flocking part 31 Flocking base Material 32 Adhesive sheet P pin

Claims (1)

[Claims] 1. A toothbrush having a brush-implanted portion on a head portion connected to a handle portion, wherein the brush-implanted portion is formed by implanting a brush on a plate-shaped bristle-implanting base material, and the head portion has the brush-implanted portion. A toothbrush having a removable fitting part formed therein.