JPH069630Y2 - electric toothbrush - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electric toothbrush, and more particularly to an assembly structure for a waterproof cap.

[Background Art] As a conventional electric toothbrush, as disclosed in Japanese Utility Model Publication No. 53-9394, there is one in which a waterproof cap is protruded from an inner surface of a casing so as to be sandwiched between a fitting and an inner surface of the casing. However, in such a conventional example, since the waterproof cap is assembled inside the cylindrical main body casing and must be assembled at the same time as the mechanical part, the assembling property is poor, and the center of the drive shaft and the waterproof cap are aligned with each other. There was a problem that it was difficult.

[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to improve the attachment and repairability of a waterproof cap and to improve the reliability of waterproof electric toothbrush. To provide.

DISCLOSURE OF THE INVENTION In the electric toothbrush of the present invention, a waterproof cap 2 is provided on the upper end of a cylindrical main body casing 1 having a drive shaft 7 protruding from the upper end.
While attaching the lid 12 having the opening 16 through which the waterproof cap 2 penetrates to the upper end of the main body casing 1,
The collar portion 11 formed on the lower end peripheral edge of the waterproof cap 2 is sandwiched in the axial direction of the main body casing 1 by the peripheral edge portion of the opening 16 of the lid body 12 and the upper end surface of the main body casing 1. By constructing as described above, the drawbacks of the conventional example are solved. That is, with the above-described configuration, the lid body 12 is covered from above the main body casing 1, and the collar portion 11 of the waterproof cap 2 can be sandwiched between the lid body 12 and the main body casing 1. 2 can be mounted outside the main body casing 1 to facilitate the mounting, improve the repairability, and improve the reliability of waterproofing.

Hereinafter, the present invention will be described in detail with reference to embodiments.

As shown in FIG. 1, the main body housed in the tubular main body casing 1 includes a storage battery or a dry battery 3, a motor 4,
The drive gears 5 and 6 and the drive shaft 7 are included. The drive shaft 7 has a swing lever 8, and the drive gears 5 and 6 are driven with a certain reduction ratio by the rotation of the motor 4, and the drive pin 9 protruding from the drive gear 6 and the swing lever 8 are fitted together. As a result, the drive lever 8 is configured to swing at a certain angle. Here, all of the above drive systems are generically referred to as drive block A. The drive block A is inserted into the main body casing 1 and fixed to the main body casing 1 by a partition plate 13. A short-circuit fitting 14 is attached to the bottom of the main body casing 1, and the bottom opening of the main body casing 1 is closed by a bottom lid 20. The switch 15 is rotatably attached to the upper outer periphery of the main body casing 1 by screwing or fitting by undercut,
Turn on the power to the motor 4 by rotating the switch 15.
It can be turned off. A toothbrush 21 is attached to the drive shaft 7. Further, a waterproof cap 2 made of an elastic material such as rubber is press-fitted and fixed to the drive shaft 7, and a flange portion 11 at a lower end peripheral portion of the waterproof cap 2 has an upper surface 1 ′ of the main body casing 1 and an opening of a lid body 12. It is compressed and fixed between the periphery of the portion 16. That is, the waterproof cap 2 is press-fitted into the drive shaft 7 and the lid 12 is attached from above. At this time, the lid body 12 satisfies the waterproof performance by sandwiching the flange portion 11 at the lower end peripheral edge of the waterproof cap 2 with the upper surface 1 ′ of the main body casing 1. The lid 12 is fixed to the main body casing 1 by means of a convex portion 17 formed on the inner peripheral surface of the lid body 12 and a small diameter portion 1a provided so that the lid body 12 is fitted to the upper end portion of the main body casing 1. It is performed so as to engage with the concave portion 18 formed on the outer peripheral surface. That is, the lid 12 is fixed to the main body casing 1 by fitting by undercut. As described above, since the waterproof cap 2 is attached by sandwiching the collar portion 11 between the lid body 12 and the upper end of the main body casing 1, the reliability of waterproofing can be improved only by the dimensional relationship between the lid body 12 and the main body casing 1. It is easy to control the dimensions in manufacturing because it is affected by it. Further, the lid 12 and the main body casing 1 are coupled by undercutting with the convex portion 17 and the concave portion 18, so that the waterproof cap 2 is penetrated through the opening 16 of the lid body 12 when the waterproof cap 2 is attached. After that, it is only necessary to fit the lid body 12 to the main body casing 1, and the assembling property is improved.

5 and 6 show an electric toothbrush stand C of the electric toothbrush as described above, which is used by fitting the electric toothbrush body B and the drive shaft 7 of the electric toothbrush body B into the toothbrush. 21 and 21 are stored upright. The electric toothbrush stand C has a base 22 and a cover 2 which also serves as a cup.
3 and 3. Cup-type cover 23
Is used as a cup when the electric toothbrush body B is used. A disk-shaped raised portion 24 is provided on one side of the upper surface of the base 22, and the raised portion 24 is provided with a fitting convex portion 25 for holding the toothbrush 21. A storage recess 26 is provided on the other side of the base 22, so that when the electric toothbrush body B is not used, it is fitted into the storage recess 26 and stored in an upright position. A convex protrusion 27 is provided between the raised portion 24 and the upper surface of the base 22. Then, after the toothbrush 21 is attached to the drive shaft 7 of the electric toothbrush main body B and the toothbrush is used, the toothbrush 21 is fitted into the protrusion 25.
The electric toothbrush main body B after use is housed in the housing recess 26. And the cover 23 that also serves as a cup
The raised portion 24 of the base 22 is covered with the to prevent dust and dirt from entering. At this time, the peripheral portion 28 of the cover 23 is the base 2
When it is stored in contact with the upper surface of 2, the inside of the cover 23 becomes a closed chamber, the wet toothbrush 21 does not dry, and dust and dirt adhere to the peripheral portion 28, which is unsanitary, but the raised portion 24. By providing the convex protrusion 27 between the base 22 and the upper surface of the base 22, a uniform gap is formed between the peripheral portion 28 of the cover 23 and the upper surface of the base 22, and the toothbrush 2
It is possible to improve the drying property of No. 1 and the sanitary properties of the peripheral edge portion 28. That is, by forming the gap, the cover 2
3 is sufficiently ventilated to improve the dryness of the toothbrush 21, and since the peripheral edge portion 28 does not contact the upper surface of the base 22, dust and dirt are not attached to the peripheral edge portion 28 and the peripheral edge portion 28 can be prevented from being soiled. It became so. . The cover 23 is always housed in a fixed position by using the convex protrusion 27 as shown in FIG.

[Effects of the Invention] As described above, the present invention attaches a lid body having an opening through which a waterproof cap penetrates to the upper end of the main body casing, and a collar portion formed on the lower edge of the waterproof cap around the opening of the lid. Since the main body casing and the upper end surface of the main body casing are clamped in the axial direction of the main body casing, the lid body is covered over the main body casing so that the collar portion of the waterproof cap can be sandwiched between the lid body and the main body casing. The cap can be attached outside the main body casing for easy installation and good repairability.In addition, the collar part can be sandwiched between the lid and the main body casing to improve the reliability of waterproofing. is there.

Further, the flange portion formed on the lower edge of the waterproof cap is clamped in the axial direction of the main body casing by the peripheral edge of the opening of the lid and the upper end surface of the main body casing to ensure sealing performance. Even if a load is applied in the radial direction of the main body casing, the collar part is clamped in the axial direction to ensure the sealing performance.Therefore, compressive force or tensile force is not applied to the flange part that is clamped in the axial direction. It is hard to apply and the load from the drive shaft does not easily affect the seal part.In addition, even if the waterproof cap attached to the upper part of the main body casing has dimensional variations, the flange part is clamped in the axial direction. Since it is designed to ensure the sealing performance, it is possible to obtain a certain sealing effect by sandwiching the collar portion regardless of the dimensional variation because it is difficult for the collar portion that is sandwiched in the axial direction to have a dimensional change. It is capable of ensuring the sealing property are.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention seen from the front, FIG.
FIG. 3 is a side view of the same as above, FIG. 3 is a sectional view taken along line XX of FIG.
FIG. 4 is an exploded perspective view of the above, FIG. 5 is a perspective view of the electric toothbrush stand in the same state, and FIG. 6 is a partially cutaway enlarged front view showing a main part of FIG. Is a body casing, 2 is a waterproof cap, 7 is a drive shaft, 11 is a collar portion, 12
Is a lid, and 16 is an opening.

Claims (2)

[Scope of utility model registration request] 1. A waterproof cap is provided on an upper end of a cylindrical main body casing having a drive shaft projecting from the upper end, and a lid having an opening through which the waterproof cap penetrates is attached to the upper end of the main body casing. An electric toothbrush characterized in that a brim formed on the lower end peripheral edge of the cap is sandwiched in the axial direction of the main body casing by the peripheral edge of the opening of the lid and the upper end surface of the main body casing. 2. A utility model registration claim characterized in that the lid and the main body casing are connected to each other by providing a convex portion and a concave portion which engage with the inner peripheral surface of the lid body and the outer peripheral surface of the main body casing, respectively. The electric toothbrush according to item 1.