JPH07335070A - Water-proof push switch device for electric equipment - Google Patents

Abstract

PURPOSE:To provide a water-proof push switch device, which has simple structure and can be easily assembled. CONSTITUTION:A device is provided with a switch lever 22, a switch fitting 23, button switches 24, 24A, which are arranged inside a switch forming position of an electric toothbrush main body. The button switches 24, 24A are made of elastic material, and have cylindrical fitting parts 241, 241A with a diameter a little larger than that of through holes 21, 21A formed in the main body 1 and columnar pushing parts 243, 243A formed inside the fitting parts 241, 241A. The fitting parts 241, 241A of the button switches 24, 24A are adhered to the through holes 21, 21A by pressing them into the through holes 21, 21A for fitting, and the sufficient water-proof characteristic is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof push switch device for electric equipment, which has a particularly simple structure.
The present invention relates to a waterproof push switch device that can be easily assembled.

[0002]

2. Description of the Related Art Conventionally, a switch of an electric device such as an electric toothbrush which uses water is required to be waterproof. For example, an O switch is provided between a switch button or a switch cam and a case.
It was waterproof by putting in a ring. However, the conventional waterproof switch device has a problem that its structure is complicated.

As a waterproof push switch device that solves such a problem, Japanese Patent Laid-Open No. 1-244710 discloses a drive block having a diameter smaller than the inner diameter of the cylindrical case inserted through the bottom opening of the cylindrical case. In the electric toothbrush assembled by assembling, an opening is formed in the switch portion on the side surface of the case, and a rubber operator having a protrusion for pushing the switch facing the opening is arranged from the outside of the case in the opening, There is disclosed a waterproof push switch device in which the operator is sandwiched and fixed by a case and a switch panel.

[0004]

However, in the waterproof push switch device disclosed in Japanese Patent Laid-Open No. 1-244710, it is necessary to fix a switch panel or the like to the case, so that the switch panel or the like is waterproof. It is the current situation that it is held firmly fixed to ultrasonic waves, etc., and a jig for fixing the switch panel is required, and there is a problem that its assembly is troublesome. is there. Therefore, there is a demand for a waterproof push switch device that has a simpler structure, is easy to assemble, and exhibits sufficient waterproofness.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a waterproof push switch device having a simple structure and easy to assemble.

[0006]

The waterproof push switch device according to claim 1 of the present invention is a switch mechanism which is switchable by pressing and is provided inside a switch forming portion of a machine frame of an electric device, and the switch mechanism. A push switch for pressing a waterproof push switch device, wherein a through hole portion is formed at a switch forming portion of the machine frame, and the push switch is made of an elastic member and has a diameter slightly smaller than that of the through hole portion. It has a large cylindrical fitting portion and a columnar pressing portion formed in the fitting portion, and the fitting portion of the push switch is press-fitted into the through hole portion.

In the waterproof push switch device according to a second aspect of the present invention, the support ring of the fitting portion is provided inside the fitting portion of the push switch.

Further, in the waterproof push switch device according to a third aspect of the present invention, the push switch has a substantially umbrella-shaped switch cover portion having a diameter larger than an outer diameter of the fitting portion.

[0009]

According to the structure of claim 1, the through hole portion formed in the switch forming portion of the machine frame of the electric device is made of an elastic body having a fitting portion slightly larger in diameter than the through hole portion. Only by press-fitting and fitting the push switch at the fitting portion, the fitting portion made of the elastic body can be brought into close contact with the through-hole portion to exhibit sufficient waterproofness.

Further, according to the second aspect of the invention, since the support ring of the fitting portion is arranged inside the fitting portion of the push switch, the waterproof property of the through hole portion is further improved.

Further, according to the third aspect of the present invention, since the push switch has the switch cover portion having a substantially umbrella shape having a diameter larger than the outer diameter of the fitting portion, the push switch has the substantially umbrella shape on the surface of the machine frame. By inserting the push switch until the outer edge portion of the switch cover portion comes into contact, watertightness can be exhibited even at the corresponding contact portion, so that the waterproof property is extremely good.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention, which is an electric toothbrush 100 which is an electric device required to be waterproof, will be described below with reference to FIGS. 1 to 5, reference numeral 1 denotes a main body which is a machine frame made of a synthetic resin and formed in a cylindrical shape having a slightly flattened substantially elliptical cross section. The main body 1 has an upper side and a lower side (bottom side). An upper cap 2 and a bottom cap 3 are fitted in each. Inside the main body 1, internal mounting plates 4 and 5 are arranged.
Reference numeral 5 forms a motor case 6A of a DC motor 6 serving as a drive unit below, and a battery case 7A of a nickel-cadmium battery 7 serving as a secondary battery is inserted below the motor case 6A.
Reference numerals 8 and 8A denote battery contact pieces for connecting the DC motor 6 and the nickel-cadmium battery 7, 8 is a positive side and 8A is a negative side, and the negative side battery contact piece 8A is connected to a battery case 7A. Battery contact piece 81A and the battery contact piece 81A
To the upper part of the main body 1, and a battery contact piece 83A connected to one terminal of the DC motor 6 via the switch fitting 23. On the other hand, a coil spring 9 is attached to the lower end of the DC motor 6 so as to be connected to the other terminal of the DC motor 6, and the elastic force of the coil spring 9 causes the nicad battery 7 via the battery contact piece 8. The positive electrode is connected with a sufficient contact pressure, and a predetermined voltage is supplied from the nickel-cadmium battery 7 to the DC motor 6.
An electromagnetic induction coil 10 and a pair of electrode pins 10A and 10B are provided on the bottom of the bottom cap 3 to allow the nickel-cadmium battery 7 to be charged from the outside. In addition, 10C is a screw member for fixing.

A pinion 11 is fixed to the shaft portion of the DC motor 6, and the rotation of the motor 6 is transmitted to the face gear 12 by meshing the pinion 11 and the outer peripheral gear portion 13 of the face gear 12. The face gear 12 is rotatably supported around a rod pin 14 as an axial center, and forms a cylindrical eccentric cam portion 15 at an eccentric position of the rod pin 14. A shaft portion 16 extends from one end of the eccentric cam portion 15, and a ring-shaped bearing 17 abutting against the internal mounting plates 4 and 5 is slidably and rotatably provided in the middle of the shaft portion 16. The toothbrush body 18 is inserted and attached to the tip thereof, and the truncated cone-shaped upper cap 2 is detachably connected to the mounting portion of the toothbrush body 18. A rubber cap 19 and packing for waterproofing are provided around the shaft portion 16.
19A is provided.

Reference numeral 20 is a waterproof push switch device. This waterproof push switch device 20 includes two through-hole portions 21 and 21A formed in the main body 1 and a switch mechanism arranged inside the main body 1. It comprises a barrel switch lever 22 and a leaf spring switch fitting 23 that can be pressed by the switch lever 22. In addition, S is a protrusion which is a fulcrum of the switch lever 22 formed on the internal mounting plate 4. On / off button type switches 24, 24A made of an elastic member such as rubber, which is a push switch, are press-fitted into the through holes 21, 21A. As shown in FIGS. 4 and 5, the button type switches 24 and 24A are provided with annular fitting portions 241 and 241A having a diameter slightly larger than the through holes 21 and 21A. The tips of the fitting portions 241, 241A are slightly bent inward, and locking portions 242, 242A are formed therein. The pressing portion 243 is provided inside the fitting portions 241 and 241A.
, 243 A is projected. Further, the fitting portions 241, 241
Plastic support rings 244 and 244A, which are support members of the fitting portion, are inserted into the gaps between A and the pressing portions 243 and 243A, and are locked at the locking portions 242 and 242A. The tops of the button switches 24, 24A are umbrella-shaped switch cover parts 245, 245A whose outer surfaces are larger than the outer diameters of the fitting parts 241, 241A and are substantially spherical. The outer edge portions 246, 246 A of the 245, 245 A extend to the outside of the fitting portions 241, 241 A.
In such a waterproof push switch device 20, the switch lever 22 and the switch metal fitting 23 are arranged on the internal mounting plate 4 together with the DC motor 6 and the like and inserted into the main body 1, and then the button holes are formed in the through holes 21, 21A. Switch 24, 24A fitting part 24
It is possible to assemble by simply inserting the 1, 241 A until the outer edge portions 246, 246 A come into contact with the main body 1.

The operation of the above configuration will be described. When the button type switch 24 is pressed, the switch lever
22 moves around the fulcrum S as a base point and presses one side of the switch fitting 23, and accordingly, the switch fitting 23 conducts to the battery contact piece 83A to form a circuit, the DC motor 6 is activated, and the pinion 11, The toothbrush body 18 can be swung and brushed by the swinging movement of the shaft portion 18 through the face gear 12, the outer peripheral gear portion 13, the rod pin 14, the eccentric cam portion 15, and the like. When you have finished brushing your teeth again, a button-type switch
When 24A is pressed, the pressing portion 243A presses the other side of the switch lever 22, so that the switch fitting 23 can be separated from the battery contact piece and the battery contact piece 83A by the elastic force of itself, and can be turned off. Further, when the bottom part of the electric toothbrush is installed on a charging stand or the like, the electromagnetic induction coil 10 energizes the pair of electrode pins 10A, 10B arranged on the bottom part of the bottom cap 3, and the battery contact pieces 8, 8A are used to feed the nicad. The battery 7 can be charged.

As described in detail above, the waterproof push switch device 20 for an electric toothbrush according to the first embodiment is provided with a switch lever 22 and a switch fitting 23 disposed inside the switch forming portion of the main body 1 of the electric toothbrush, and a button. Type switches 24, 24A, and the button type switches 24, 24
A is a through hole formed in the main body 1 made of an elastic member
The fitting portions 241, 241 A slightly larger in diameter than 21, 21 A and the columnar pressing portions 243 formed in the fitting portions 241, 241 A,
243 A, the through holes 21, 21
The button type switches 24, 24A have fitting portions 241, 241
A fitting portion 241 made of the elastic body only by press-fitting A.
, 241 A, the elastic force of 241 A makes it possible to closely adhere to the through holes 21, 21 A, thereby exhibiting sufficient waterproofness. Further, the fitting portions 241 and 241A of the button type switches 24 and 24A are
Since the support rings 244, 244A are inserted inside the inner surfaces of the holes, the fitting portions 241, 241A are prevented from being deformed inward, so that the through holes 21, 21A are more waterproof and stable. Target. Particularly in this embodiment, since the button type switches 24, 24A have switch cover portions 245, 245A having a substantially umbrella shape having a diameter larger than the outer diameters of the fitting portions 241, 241A, the surface of the main body 1 is The switch cover part 24
5. By inserting the button type switches 24, 24A until the outer edges 246, 246A of the 5, 245A come into contact with each other, the watertightness is exhibited even at the contact points between the outer edges 246, 246A and the main body 1. Therefore, the waterproof property is extremely good.

Although the present invention has been described based on the first embodiment, the present invention is not limited to the above-mentioned embodiment, and, for example, the type of the switch can be variously modified. Further, the electric device is not limited to the electric toothbrush, but can be applied to various electric devices required to be waterproof, such as an electric cutter for cooking and an electric shaver.

[0018]

The waterproof push switch device for an electric device according to claim 1 of the present invention comprises a switch mechanism which is switchable by pressing and is disposed inside a switch forming portion of a frame of the electric device, and the switch mechanism. A waterproof push switch device comprising a push switch for pressing, wherein a through hole portion is formed at a switch forming portion of the machine frame, and the push switch is made of an elastic member and has a diameter slightly larger than the through hole portion. Since it has a cylindrical fitting portion and a columnar pressing portion formed in the fitting portion, and the fitting portion of the push switch is press-fitted into the through hole portion, it is a machine of an electric device. A push switch made of an elastic body having a fitting portion slightly larger in diameter than the through hole portion is press-fitted into the through hole portion formed in the switch forming portion of the frame at the fitting portion. Only that, it is possible to insert portion made of the elastic body exerts the perfect adhesion and sufficient waterproofness in the through hole.

Further, in the waterproof push switch device of the electric device according to the present invention, the support ring of the fitting portion is arranged inside the fitting portion of the push switch.
The waterproof property in the through hole portion is further excellent and stable.

Further, in the waterproof push switch device for an electric device according to a third aspect of the present invention, since the push switch has a substantially umbrella-shaped switch cover portion having a diameter larger than the outer diameter of the fitting portion, the surface of the machine frame is provided with By inserting the push switch until the outer edge portion of the substantially umbrella-shaped switch cover portion comes into contact, the watertightness can be exhibited even at the corresponding contact portion, so that the waterproof property is extremely good.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view of the first embodiment.

FIG. 3 is a partially cutaway front view of the first embodiment.

FIG. 4 is a partially enlarged sectional view showing the waterproof push switch device according to the first embodiment.

FIG. 5 is a perspective view showing a button type switch of the waterproof push switch device according to the first embodiment of the present invention.

[Explanation of symbols]

 1 Main body (machine frame) 21, 21A Through hole 22 Switch lever (switch mechanism) 23 Switch fitting (switch mechanism) 24, 24A Button type switch (push switch) 25 Switch case (switch mechanism) 100 Electric toothbrush (electric equipment) 241, 241 A Fitting part 243, 243 A Pressing part 244, 244 A Support ring (support member) 245, 245 A Switch cover part

Claims (3)

[Claims] 1. A switch mechanism that is switchable by pressing and is provided inside a switch forming portion of a machine frame of an electric device.
A waterproof push switch device comprising a push switch for pressing the switch mechanism, wherein a through hole portion is formed at a switch forming portion of the machine frame, and the push switch is made of an elastic member, and is formed from the through hole portion. It has a slightly larger diameter cylindrical fitting portion and a columnar pressing portion formed in the fitting portion, and the fitting portion of the push switch is press-fitted into the through hole portion. Waterproof push switch device for electric equipment. 2. The waterproof push switch device for an electric device according to claim 1, wherein a support ring of the fitting portion is provided inside the fitting portion of the push switch. 3. The waterproof push switch device for an electric device according to claim 1, wherein the push switch has a substantially umbrella-shaped switch cover portion having a diameter larger than an outer diameter of the fitting portion.