JPH0227779Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a toothbrush that can be freely inserted and removed in the middle of its length, so that it can be conveniently disassembled and assembled for portable use.

(Prior art and its problems) In order to make the main body provided with brush bristles and the grip part freely insertable and removable in the length direction, a fitting shaft is conventionally provided in the main body, and the fitting shaft is provided in the other grip part. There are toothbrushes that have a fitting hole for fitting the shaft.

In the case of this conventional toothbrush, the main body and the gripping portion were simply connected, and it could easily be disassembled during use. In order to prevent this disassembly, it is possible to adjust the size of the fitting shaft and the fitting hole and press fit tightly, but this will make it difficult to disassemble.
In the end, there was a problem during assembly and disassembly.

Therefore, as shown in FIG.
In order to make the main body 101 equipped with 2 and the grip part 106 detachable in the longitudinal direction, an insertion shaft 104 is provided on the main body 101, and the insertion shaft 104 is fitted into the other grip part 106. A fitting hole 107 is provided, and a protrusion 105 is provided on the fitting shaft 104 so as to protrude from the fitting shaft 104. Protrusion 105
There is one in which a narrower slit 109 is formed and a stopper 110 for engaging the protrusion 105 is formed at the end of the slit 109.

To assemble this conventional toothbrush, the main body 1
01 fitting shaft 104 into the fitting hole 10 of the grip part 106.
7, the protrusion 105 protruding from the insertion shaft 104 has a slit 109 narrower than the protrusion 105.
It is guided into the slit 109 and slid into the slit 109 against its elastic force, and is securely engaged at the stopper 110.

Therefore, there is no need to tightly fit the fitting shaft 104 into the fitting hole 107, which makes assembly and disassembly easier than in the conventional example.

However, the stopper 110
Since the stopper 110 is provided at the end of the stopper 110, it has poor elasticity and concentrates stress.
13, etc., and the fitting hole 107 was destroyed.

In view of the above-mentioned problems, the present invention has been developed to provide a toothbrush in which the main body with bristles and the grip can be freely inserted and removed in the longitudinal direction, which can be assembled reliably, is easy to assemble and disassemble, and is durable and difficult to break. The purpose is to provide toothbrushes.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a main body 1 having a large number of brush bristles 2 and a grip portion 6 that can be freely inserted and removed in the length direction. In a toothbrush made of synthetic resin, one of the main body 1 and the grip part 6 has a fitting shaft 4 and the other has a fitting hole 7, and the toothbrush has bristles 2. An engaging portion 12 is provided only on the front side, and the engaging portion 12 is connected to a protrusion 5 protruding from the middle of the insertion shaft 4 and the protrusion 5.
It consists of a slit 9 having a narrower width and formed along the length direction from the opening edge 8 of the fitting hole 7,
The slit 9 has a stopper 10 that allows the protrusion 5 of the insertion shaft 4 to be engaged and disengaged through elastic deformation, and extends from the stopper 10 in the insertion direction of the insertion shaft 4 and has a stopper 10 at its end. It is characterized by having a wide end portion 11 that enhances the elastic deformation and prevents stress concentration.

(Function) To assemble the toothbrush according to the present invention, the fitting shaft 4 is inserted into the fitting hole 7. At this time, the protrusion 5
is guided from the protrusion 5 to the narrow slit 9, is smoothly inserted and slid through the slit 9 through elasticity, and is securely engaged with a stopper 10 provided in the middle of the slit 9. Ru. The stress generated during this insertion is caused by the wide end portion 1 at the end of the slit 9.
It is possible to prevent cracks and damage due to stress concentration by dispersing the stress in the slipper 1.
Since it extends from 0 in the insertion direction and has a wide portion 11 at its end, the elastic deformation of the slit 9 is also enhanced. To disassemble this toothbrush, simply pull it in the length direction in the opposite direction to the above operation.

(Example) Examples of the present invention will be described in detail below based on the drawings.

FIG. 1 shows an exploded perspective view of a toothbrush according to the present invention, and FIG. 2 shows a plan view of FIG. 1.

In the figure, reference numeral 1 denotes a main body provided with a large number of brush bristles 2, and a fitting shaft 4 is extended from the other end of the bristles 2 via a stepped portion 3. The insertion shaft 4 has a non-circular cross section (the illustrated example is a square), and a hemispherical protrusion 5 is protruded from the middle of the front side provided with the brush bristles 2.

The other 6 indicates a grip portion having approximately the same length as the main body 1, and a fitting hole 7 corresponding to the insertion shaft 4 is provided in the length direction from one end of the grip portion. The fitting shaft 6 is made of elastically deformable synthetic resin.

A slit 9 narrower than the protrusion 5 of the insertion shaft 4 is formed in the fitting hole 7 along its length from the opening edge 8 thereof.

The slit 9 includes a wide circular stopper 10 having approximately the same diameter as the protrusion 5 at an intermediate position corresponding to the protrusion 5, and an end wide part 11 having a wide circular shape at its end. .

The toothbrush of this embodiment, as shown in FIG.
An engaging portion 12 is formed by the slit 9 including the step portion 3 and the opening end of the fitting hole 7. During assembly, the fitting shaft 4 is inserted into the fitting hole 7, and the step portion 3 and the open end of the fitting hole 7 are inserted. The protrusion 5 is engaged with the stopper 10 at the position where the edge 8 abuts, thereby assembling.

At this time, the fitting shaft 4 and the fitting hole 7, which have a non-circular cross section, serve as a suitable mechanism for preventing rotation of the main body 1 and the grip portion 6.

The engaging portion 12 is provided only on the front side provided with the brush bristles 2.

Furthermore, although it is possible to provide the engaging portions 12 at a plurality of locations, this is considered unreasonable as it would unnecessarily increase costs.

Next, FIG. 3 shows an exploded perspective view of the toothbrush of the second embodiment. In the figure, 51 is a main body equipped with brush bristles 52, and a fitting shaft 54 with a non-circular cross section (rectangular in the illustrated example) around which a flange 53 is provided.
have. And the brush bristles 5 of the insertion shaft 54
Hemispherical protrusions 55a and 55b are protruded from the front side provided with the flange 2 at line-symmetrical positions with respect to the flange 53.

The other 56 is a cylinder with a bottom, and the inside thereof is a fitting hole 57 into which the fitting shaft 54 is fitted.

In the fitting hole 57, projections 55a and 55b of the fitting shaft 54 extend from the opening edge 58 of the fitting hole 57 in the length direction.
A narrower slit 59 is formed.

The slit 59 has the protrusion 55 in the middle thereof.
The protrusions 55a and 55a are located at positions corresponding to the protrusions 55a and 55b.
The stopper 60 includes a circular stopper 60 having the same diameter as that of the stopper 5b, and a circular wide end portion 61 at its end.

Therefore, the toothbrush of this embodiment has the protrusion 55a.
An engaging portion 62 is constituted by the stopper 60 and the slit 59 including the wide end portion 61. During assembly, the fitting shaft 54 is inserted into the fitting hole 57, and the fitting shaft 54 is inserted into the fitting hole 57. Flange 53 and fitting hole 5
The protrusion 55a is configured to be engaged with the stopper 60 at the position where the opening edge 58 of No. 7 abuts. Conversely, after disassembling the main body 5
1 is inserted into the inside of the grip part 56, that is, into the fitting hole 57 from the side of the brush bristles 52, and the other protrusion 55b is engaged with the stopper 60, so that it can be stored extremely compactly.

(Effect of the invention) Main body 1 equipped with a large number of brush bristles 2 and gripping part 6
In order to allow the main body 1 and the grip part 6 to be freely inserted and removed in the length direction, one of the main body 1 and the grip part 6 is made of synthetic resin having a fitting shaft 4 and the other having a fitting hole 7. The toothbrush includes a protrusion 5 protruding in the middle of the insertion shaft 4, and a slit 9 narrower than the protrusion 5 and formed along the length from the opening edge 8 of the fitting hole 7. Furthermore, the slit 9 is provided with a stopper 10 midway therein for engaging the protrusion 5 of the insertion shaft 4, so that the insertion shaft 4 can be inserted into the insertion hole. When inserting into 7,
The protrusion 5 is elastically inserted and slid into the slit 9, and is smoothly but reliably engaged with a stopper 10 provided in the middle of the slit 9. Therefore, although it is easy to disassemble and assemble, it does not easily disassemble during use.

Furthermore, since the slit includes the wide end portion 11 at its end, the stress generated during the insertion is suitably dispersed, and damage caused by stress concentration can be avoided.

That is, the slit 9 clamps the protrusion 5 inserted and slid therein through elastic deformation, and the stopper 10
It is said that it can be freely engaged and disengaged through elastic deformation, and in this case, since it extends further in the insertion direction than the stopper 10 and has a wide part 11 at its end, elastic deformation in the stopper 10 part is enhanced. wide part 11
It is possible to prevent stress concentration at

Furthermore, since the engaging portion 12 is provided only on the front side of the toothbrush that has the bristles 2, the slit 9 will not be inadvertently expanded when the fitting shaft 4 is inserted into the fitting hole 7. Moreover, it is easy to check whether it has been assembled properly, and it is extremely rational and durable.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the first embodiment of the present invention, Fig. 2 is a plan view of the assembled state of Fig. 1, Fig. 3 is an exploded perspective view of the second embodiment, and Fig. 4 is a conventional 1 shows a top view of a toothbrush. 1...Main body, 2...Brush bristles, 4...Insertion shaft,
5...Protrusion, 6...Gripping part, 7...Fitting hole, 8...
...Opening edge, 9...Slit, 10...Stopper, 11... End wide part.

Claims (1)

[Claims for Utility Model Registration] Main body 1 equipped with a large number of brush bristles 2, and gripping part 6
In order to freely insert and remove the main body 1 in the length direction,
In a toothbrush made of synthetic resin, one of which has the fitting shaft 4 and the other has the fitting hole 7, the toothbrush is engaged only with the front side of the toothbrush having the bristles 2. A mating portion 12 is provided, and the mating portion 12 includes a protrusion 5 protruding in the middle of the insertion shaft 4, and a protrusion 5.
It consists of a slit 9 having a narrower width and formed along the length direction from the opening edge 8 of the fitting hole 7,
The slit 9 has a stopper 10 that allows the protrusion 5 of the insertion shaft 4 to be engaged and disengaged through elastic deformation, and extends from the stopper 10 in the insertion direction of the insertion shaft 4 and has a stopper 10 at its end. A toothbrush characterized in that it has a wide end portion 11 that enhances the elastic deformation and prevents stress concentration.