JPH0448585Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a push button switch, and more particularly to a waterproof push button switch in which a filter is formed of an elastic material in order to provide water resistance inside the button.

(Prior Art) Conventionally, this type of push button switch has a structure in which the top surface of the plunger and the filter are fixed together using an ultrasonic welder to provide water-proof properties inside the plunger. Also,
In other structures, the plunger and filter were integrally formed.

(Problems to be solved by the invention) According to the above conventional technology, the filter is fixed to the top surface of the plunger using an ultrasonic welder or adhesive. It is necessary to prepare each, and there are drawbacks such as the need for space in inventory management. Furthermore, since elastic members are provided within the plunger and the switch body, there are drawbacks such as the inability to change colors if the plunger and filter are integrated.

Further, there were other drawbacks such as dust, water, etc. entering between the inner surface of the button and the filter, making the surface of the operating section unclear.

The object of the present invention is to provide a waterproof push button switch that not only seals between the plunger and the filter, and between the filter and the inner surface of the button, but also allows easy exchange of color tone and display.

(Means for Solving the Problem) The waterproof push button switch of the present invention has an elastic member formed in an inverted U shape, whose ends are fitted into respective grooves of the housing and the plunger, and which is further provided on the upper surface of the plunger. The filter is made of an elastic material, and protrusions are formed around the upper and lower surfaces of the filter, so that the filter is sandwiched between the inner surface of the button and the upper surface of the plunger, and the area around the upper surface of the plunger and between the upper surface of the filter and the inner surface of the button is sealed. This is what I did.

(Function) According to the present invention, the filter is formed of an elastic body,
Protrusions are provided on the upper and lower surfaces, and each protrusion is sandwiched between the inner surface of the button and the upper surface of the plunger, and the spaces between the inner surface of the button and the upper surface of the filter and the upper surface of the plunger are sealed.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a sectional view of the main parts of the waterproof push button switch of the present invention, Fig. 2 is an exploded perspective view of the waterproof push button switch of the invention, and Fig. 3 is a sectional view of the main parts to explain the sealability of the invention. FIG. 4 is a perspective view of a filter according to the present invention with a recess formed therein, and FIG. 5 is a sectional view of a main part showing another embodiment of the filter according to the present invention. In these figures, reference numeral 1 indicates the housing of the switch, and the housing has an open end face 1-1 and a collar 1-5, into which a plunger 2 and an operating shaft 3 are fitted. A contact mechanism section (not shown) that opens and closes using the operating shaft 3 is provided,
A terminal 10 protrudes from the lower surface of the housing 1. One end of an inverted U-shaped elastic member 4 is fitted between the operating shaft 3 that presses this contact mechanism part and the plunger 2, and the other end has an upwardly stepped part 1-2 in the center of the housing 1. , and is fitted into the groove 1-3 provided around the upper surface of the contact mechanism to maintain a tight seal with respect to the contact mechanism.

A light emitter 5 is disposed approximately in the center of the plunger 2, and the light emitter 5 is connected to a light emitter terminal 11 that protrudes from the lower surface of the housing 1 within the housing 1.
is connected to. This light emitter 5 is engaged with the plunger 2 and moves up and down together with the plunger 2.

The inner surface of the plunger 2 is formed into a dome shape, and a circular elastic plate is formed on the upper surface thereof.
Filter 6 with protrusions 6-1 formed around the upper and lower surfaces
is placed. A circular button 7 is fitted around the outer periphery of the plunger 2 in a convex-concave manner, and the filter 6 is held between the upper surface of the plunger 2 and the inner surface of the button 7.

Screws 1-4 are carved on the outer periphery of the housing 1,
This switch is attached to the panel by tightening with a nut 9 through a packing 8 made of an elastic plate.

In FIG. 4, a recess 6-2 is provided on the top surface of the filter 6, and a display board 9 with a display such as NO, OFF, etc. is inserted into this recess 6-2, and the inner surface of the button 7 and the top surface of the filter 6 are inserted into the recess 6-2. The protrusion 6-1 provided on the outer periphery provides a seal to prevent dust from entering.

FIG. 5a shows a protrusion 6-3 on the outer peripheral side of the filter 6.
is press-fitted into the inner surface of the button 7, and has a structure that seals not only the inner upper surface of the button 7 but also the side surface.

b is a protrusion 6 provided on the outer periphery of the upper and lower surfaces of the filter 6;
-1 is made into an acute angle, and various shapes are possible.

(Effects of the invention) As described above in detail, the invention has the following effects.

(1) The filter is made of an elastic material, has protrusions on the upper and lower surfaces, and is sandwiched between the upper surface of the plunger and the inner surface of the button, so that the illumination part can be easily attached to the illumination part without welding the filter and the plunger with an ultrasonic welder. is sealed, which prevents the illumination part from degrading due to water intrusion, etc.

(2) The filter is made of an elastic material, has protrusions on the upper and lower surfaces, and is sandwiched between the upper surface of the plunger and the inner surface of the button, so the structure is simple and the maintenance of the sealed dimensions is easy and reliable.

(3) The filter is made of an elastic material, has protrusions on the top and bottom surfaces, and is sandwiched between the top surface of the plunger and the inner surface of the button, making it easy to change the color tone and display, and to adjust the lighting and display as needed. can be easily done. Furthermore, since the filter and plunger are separated, it is only necessary to stock each part and combine the parts as necessary, making inventory management easy.

(4) There is no need to fix the filter and plunger with an ultrasonic welder, adhesive, etc. Therefore, the number of man-hours can be reduced and the cost is low.

In addition, when conventional ultrasonic welders and adhesives are applied, the resin and adhesive that flow out around the joint surface due to the heat of the ultrasonic welder will stain the top surface of the button, and the illuminated surface will not become uneven. Uniform illumination can be obtained.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main parts of the waterproof push button switch of the present invention, Fig. 2 is an exploded perspective view of the waterproof push button switch of the invention, and Fig. 3 is a cross sectional view of the main parts to explain the sealability of the invention. 4 is a perspective view of the filter of the present invention with a recess formed therein, FIG. 5 is a cross-sectional view of the main part showing another embodiment of the filter of the present invention, and FIG. 6 is a cross-sectional view of the main part of the conventional filter. be. 1...Housing, 2...Plunger, 3...
Operation shaft, 4... Elastic member, 5... Light emitting body, 6...
Filter, 6-1...Convex, 6-2...Concave, 6
-3...Protrusion, 7...Button, 8...Putskin, 9...
...nut, 10...terminal, 11...light emitter terminal.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a waterproof push button switch, in which an elastic member such as rubber formed in an inverted U shape is provided between the housing and the plunger, and a button is attached to the upper part of the plunger via a filter. , the ends of the elastic member formed in an inverted U shape are fitted into respective grooves of the housing and the plunger, and the filter provided on the upper surface of the plunger is formed of an elastic material, and the upper and lower surfaces of the filter are formed of an elastic material. A waterproof push button switch characterized in that a protrusion is formed around the periphery, the filter is sandwiched between the inner surface of the button and the upper surface of the plunger, and the periphery of the upper surface of the plunger and between the upper surface of the filter and the inner surface of the button are sealed. (2) forming a recess in the center of the upper surface of the filter;
A waterproof push button switch according to claim (1) of the utility model registration, characterized in that a display board is provided in the recess.