JPS6233497Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement in the mounting structure of a gasket for small electrical equipment, especially to prevent water from entering around the motor bearing. Regardless of variations in the shape of the motor shaft or motor bearing of the attached motor, the gasket can be installed while maintaining reliable watertightness, and even if the gasket shape changes due to aging after installation. To provide a packing mounting structure that can always maintain constant watertightness without causing a decrease in watertightness.

Conventionally, in small electric appliances that require waterproofness, such as washable electric shavers, a device shown in FIG. like,
The packing 53 connects the upper end of the motor 54 and the case body 5.
It was elastically clamped between the lower surface of the upper end plate 55 of 2.
However, in this case, due to the elastic deformation of only the gasket 53, the gasket 53 was in close contact with the joint between the upper end plate 55 of the main body and the motor 54, maintaining watertightness. Depending on the variation, Patsukin 5
3 does not completely adhere to the seam, or after the gasket is attached, the shape of the gasket 53 changes over time and the degree of adhesion with the seam decreases, resulting in water leaking into the case body 52 during washing. There was a risk that the equipment could be infiltrated and damaged.

Therefore, the present invention includes a motor fixing lid 14 that presses the motor 5 housed above the case body 1 from above with a motor contact part 18, and a motor fixing lid 14 that is fitted above the motor fixing lid 14 and is attached to the case body together with the motor fixing lid 14. 1, and the periphery of the motor contact portion 18 of the motor fixing lid 14 exerts an elastic force in the vertical direction about the case body 1 and the fixed portion P of the motor fixing lid 14 as a fulcrum. In order to give A gasket 20 is installed in the space 30 around the motor output shaft 12 formed between the
The above-mentioned drawbacks are prevented by elastically clamping and holding the motor fixing lid 14 between the motor fixing lid 14 and the lower surface of the upper lid 17.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

The drawings illustrate a battery-powered electric shaver. A rotary shaft 2 driven by a built-in electric motor is protruded from the upper end of the case body 1, and a rotary shaving blade block 3 connected to the rotary shaft 2 is mounted and fixed on the case body. It has become something that is done.

Figure 2 Rotary shaving blade block 3 on the case body
This is a vertical cross-sectional view of the case with the battery mounted, and the case main body has an electric motor 5 built in in the upper part, and a battery storage chamber 7 in the lower part whose open lower surface is closed with a battery cover 6. 2 AA batteries 8,8'
are housed in parallel on the left and right.

The built-in electric motor 5 has a positioning protrusion 10 protruding from the center of its lower end, and the protrusion 10 engages in a recess 9 provided in a partition wall 11 between the motor housing chamber and the battery housing chamber 7. Then, the output shaft 12 protrudes from the upper end of the motor 5, and is inserted into the boss part through hole 22 of the motor fixing lid 14 screwed onto the case body of the shaft support boss part 13 of the output shaft 12. 14 The upper surface of the motor 5 is supported by a motor abutting portion 18 protruding along the circumference of the boss portion through hole 22 on the lower surface, and the area around the motor abutting portion 18 is formed thin, and a gap Q is provided between the motor abutting portion 18 and the upper surface of the motor. In this way, the motor 5 is elastically clamped and fixed in a fixed position between the partition wall 11 and the partition wall 11. A cylindrical shaft 15 is fixed to the motor output shaft 12, and the rotary shaft 2 is attached to the cylindrical shaft 15 so that it cannot relatively rotate but can slide up and down, and the rotary shaft 2 is pushed up by an internal spring 16. The upper cover 17 is attached to the case body 1 by tightening the motor fixing cover 14 together with the motor fixing cover 14.

The rotary shaving blade block 3 has an inner blade accommodating chamber 24 at the upper part of the inside of the casing 23, and the inner blade 2 is housed here.
A rotor 26 supporting a rotor 5 is housed therein, and a holder 28 supporting a porous screen-like outer cutter 27 is screwed to the upper end of the outer wall 29 of the inner cutter storage chamber 24, and the outer cutter 27 is attached to the inner cutter 25. There is a sliding contact.

The shaving blade block 3 is tightened and fixed to the upper end of the case body 1 via a bayonet-type connection mechanism, and in this state, the lower end of the shaft 31 of the rotor 26 is inserted into the upper end of the rotation shaft 2, and protrudes from the rotor shaft 31. The provided pin 32 engages with the engagement groove 33 of the rotating shaft 2, and power is transmitted from the rotating shaft 2 to the rotor shaft 31.

In addition, the rotary shaving blade block 3 is designed to wash away hair particles adhering to the inside with water, and a gasket 19 is installed between the case body 1 and the motor fixing lid to prevent hair from entering the motor housing chamber. At the same time, a gasket 2 is also attached to the shaft support of the motor output shaft 12.
Attach 0. Here, when attaching the gasket 20 to the shaft support of the motor output shaft 12, the above-mentioned upper cover 1
Position the packing 20 in the space 30 around the motor output shaft 12 that is formed when 7 and the motor fixing lid 14 are fitted together, and in that state, tighten the upper cover 17 together with the motor fixing lid 14 as described above to close the case body. 1
When the motor contact portion 18 of the motor fixing lid 14 is attached to the upper surface of the motor 5, the area around the motor contact portion 18 is elastically deformed upward using the pinned portion P as a fulcrum due to the drag force received from the upper surface of the motor 5, and the gasket 20 is moved between the motor contact portion 18 and the lower surface of the upper lid 17. Clamp and hold. Therefore, the gasket 20 itself is elastically deformed and comes into close contact with the shaft support of the motor output shaft 12, and the elastic deformation of the motor fixing lid 14 helps the gasket 20 to come into close contact.

As described above, according to the electrical equipment having the structure as shown in the above embodiment, variations in the shape of the conventional packing,
The elastic deformation of the motor fixing lid 14 prevents the adhesion of the gasket from decreasing due to variations in the shape of the motor, and is not affected by changes in shape or characteristics due to aging after the gasket is installed, so it is always reliable. It is possible to provide a watertight structure.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a conventional example, and FIG. 2 is a longitudinal sectional view of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Case body, 5...Motor, 12...Motor output shaft, 14...Motor fixing lid, 17...Top lid, 20...Putskin.

Claims (1)

[Scope of utility model registration request] A motor fixing lid 14 that presses the motor 5 housed above the case body 1 from above by a motor contact portion 18; and a motor fixing lid 14 that is fitted above the motor fixing lid 14 and fixed on the case body 1 together with the motor fixing lid 14. In addition, the motor fixing lid 14 is provided with an upper lid 17 so that an elastic force can be applied to the periphery of the motor contact portion 18 in the vertical direction using the case body 1 and the fixed portion P of the motor fixing lid 14 as a fulcrum. In addition, the periphery of the contact portion 18 is formed thin to provide a gap Q between the upper surface of the motor 5 and the lower surface of the periphery of the contact portion 18, and a gap Q is provided between the upper lid 17 and the motor fixing lid 14. Motor output shaft 1 formed in
A small electric device characterized in that a gasket 20 is elastically held in a space 30 around the upper lid 17 by elastic force from the motor fixing lid 14 and held between the lower surface of the upper lid 17 and the lower surface of the upper lid 17.