JPH0430738Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention mainly relates to a small waterproof push button switch whose switch portion is actuated by pressing the push button.

<Prior Art> As a conventional waterproof, oil-proof, and dust-proof means for small waterproof push button switches generally used in electronic devices, vending machines, etc., the configurations shown in FIGS. 4 to 6 have been adopted. ing. That is, in the one shown in FIG. 4, an O-ring 3 is formed in a concave groove formed on the circumferential surface of the holder part 2A, between the opposing surfaces of the switch body 1 and the holder part 2A of the push button 2, which is movably provided with respect to the switch body 1. 4, so that the O-ring 3 is brought into sliding contact with the inner peripheral surface of the switch body 1 when the push button 2 is moved. Note that a D ring, a V ring, or the like may be used instead of the O ring 3.

In addition, the one in FIG. 5 has a groove 4 in the holder part 2A.
An O-ring 5 smaller than the one shown in FIG. The tip part is fitted and fixed in a groove provided on the upper edge of the cylindrical sliding ring 7, and the switch body 1 and the holder part 2
The structure is such that an O-ring 5 is joined to the inner peripheral surface of a sliding ring 7 that is suspended between the slide ring 7 and the O-ring 5 when the push button 2 is moved by pressing the button 2.
is adapted to slide on the sliding ring 7.

Furthermore, the one shown in FIG. 6 has a configuration in which the outer circumferential portion of the ring-shaped packing 8 is fixed to the annular stepped portion 1A of the switch body 1, and the inner circumferential portion thereof is brought into contact with the outer circumferential surface of the holder portion 2A of the push button 2. When the push button 2 is pressed, the holder part 2 is moved.
The outer peripheral surface of A is adapted to slide on the packing 8.

In addition, FIGS. 4 to 6 all show round illuminated waterproof push button switches, and the holder part 2A
A lamp part 9 is housed inside the lamp part 9, which blinks in response to the operating state of the switch part when the push button 2 is pressed. is filter 2
B, the name plate 2C and the lens 2D are superimposed and fixed to the holder part 2A.

<Problems to be Solved by the Invention> However, all of the above-mentioned switches have various drawbacks. In other words, since the one shown in Fig. 4 is not a rubber bellows type, the crushing amount of the O-ring 3 directly affects the operating feel of the push button 2, so the pressing operation of the push button feels heavy and the operating feeling is poor. Extremely bad.

In addition, the one in FIG. 5 has the advantage that the push button 2 can be smoothly operated by sliding the O-ring 5 onto the sliding ring 7, and the lamp part 9 can be changed as necessary. , an O-ring 5, a packing 6, and a sliding ring 7 are required, which increases the number of parts and has the disadvantage of increasing costs. Furthermore, a gasket 6 is fixed to the switch body 1, and an O-ring 5 is fitted onto the holder portion 2A. cannot be used with this type of closed type switch. Therefore, there is a problem that management of parts inventory becomes complicated.

Furthermore, in the case of the switch shown in Fig. 6, the waterproof performance is determined by the degree of curvature of the gasket 8, that is, the shape of the switch body 1, so the switch main body 1 cannot be used as a closed type switch. Managing parts inventory becomes complicated. Also, since the gasket 8 is fixed to the switch body 1, when the gasket 8 is replaced due to damage etc.,
The entire switch body must be replaced, which is very uneconomical. Moreover, in this exchange,
It takes time and effort to wire the switch body 1.

<Purpose of the invention> The present invention was devised in view of the various conventional problems described above.It has good operability with light loads, yet has complete waterproof function, and is easy to assemble and handle. To provide a waterproof push button switch which is easy to operate and has compatibility allowing the switch body to be used both as an illuminated type and as a closed type.

<Means for Solving the Problems> The waterproof push button switch of the present invention includes a switch body and a push button movably mounted inside the switch body, and the switch body and a holder portion which is a pressing part of the push button. A waterproof ring-shaped packing is interposed between a fixing part formed on the inner peripheral edge and fitted into a groove on the circumferential surface of the holder part, and a direction in which the push button is pressed from this fixing part. a thin-walled movable part that extends toward the outside and is folded back so that the end thereof extends to a position near the fixed part; The switch body is characterized by a structure in which a support part is integrally formed with the annular step surface of the switch main body, which is joined in the pushing direction of the push button by its own elastic force.

<Function> When the push button is pressed and moved, the movable part of the gasket on the side of the switch body is extended. This movable part is formed with a thin wall,
Furthermore, since there is no sliding part between the switch body and the push button holder, the load is light and a good operating feel can be obtained. Moreover, the pushing force of the push button strongly presses the support portion against the annular stepped portion, which acts to further improve waterproofness. Furthermore, since the gasket is fixed only to the holder portion of the push button and only the support portion at the outer peripheral edge is joined to the switch body, the switch body can be shaped to be used also as a closed type. In addition, Patsukin is
The fixing part on the inner periphery of this is fixed by fitting into the groove of the holder part of the push button, and the collar-shaped support part on the outer periphery of this is joined to the annular step part of the switch body. The switch body can be shared by simply replacing the push button holder when the gasket deteriorates or is damaged.
No wiring is required at all. Moreover, when the holder part of the push button is pulled out in the opposite direction to the switch body, almost no load is applied because the support part of the seal is only connected to the annular stepped part in the direction in which the push button is pushed in. It has the advantage that it can be easily pulled out without requiring any force, and maintenance can be easily performed. Moreover, since the packing is integrally formed, the cost is reduced. All you have to do is replace the push button holder, and no wiring is required.

<Embodiments> Hereinafter, preferred embodiments of the waterproof push button switch of the present invention will be described in detail with reference to the drawings.

In FIG. 1 showing an embodiment of the present invention, the same or equivalent parts as those in FIGS. 4 to 6 are given the same reference numerals. A ring-shaped gasket 10 interposed between the switch body 1 and the holder portion 2A of the push button 2 has an annular fixing portion 10A formed on the inner peripheral edge thereof, and extends from the fixing portion 10A in a perpendicular direction and extends outward. A supporting portion 10C has a thin movable portion 10B that is folded back toward the side, and a support portion 10C that protrudes outward from the movable portion 10B in an orthogonal direction.
It has a shape with a
is integrally molded from rubber or rubber elastomer. Further, at a position substantially opposite to the annular stepped portion 1A of the switch main body 1 in the holder portion 2A,
A recessed groove 11 into which the fixed part 10A is fitted is formed on the circumferential surface, and the packing 10 is assembled by fitting the fixed part 10A into the recessed groove 11 and joining the supporting part 10C onto the annular stepped part 1A to form the movable part. 10B is installed in a suspended state.

This switch operates a micro switch 12 provided at the bottom of the switch body 1 by operating a push button 2.
When the push button 2 is pressed, the actuating shaft 13 is moved downward by the holder portion 2A of the push button 2, and the actuator 14 of the micro switch 12 is rotated by the actuating shaft 13. When the reversing spring 15 exceeds the horizontal position due to the rotation of the common terminal 16
The movable contact piece 17, which is electrically connected to Switching contact is made to the normally open contact 20A.

When the push button is moved downward, the gasket 10 is deformed so that the part of the movable part 10B on the holder part 2A side is turned over from the holder part 2A, and the part of the movable part 10B on the switch body 1 side is extended. do. This movable part 10B is formed thin and has no sliding part at all like the conventional switch illustrated in FIGS. 4 and 6.
The load when operating the push button 2 is extremely light, and the gasket 10 itself has a click feeling due to the restoring force against deformation of the movable part 10B, so that an extremely good operating feeling can be obtained.
At this time, due to the pushing force of the push button 2, the support part 10C
is strongly pressed against the annular stepped portion 1A, and acts to further improve waterproofness.

In addition, the waterproof packing 10 has a fixed part 1
0A to the holder part 2A of the push button 2, and the annular stepped part 1 of this is attached to the switch body 1.
Since the support part 10C is simply joined to the switch A, the switch main body 1 can be used in common with a closed type switch by simply changing the holder part 2A. Furthermore, when replacing the packing 10 when it has deteriorated or is damaged, the holder portion 2
All you need to do is replace A, and the switch body 1 can be shared, so there is no need for any wiring. Moreover, when the holder portion 2A of the push button 2 is pulled out in the direction opposite to the push-in direction of the switch body 1, the support portion 10C of the seal 10 is only joined to the annular stepped portion 1A in the push-in direction of the push button 2. Since no load is applied, it can be easily pulled out without requiring much force, and has the advantage of being easy to perform maintenance. Furthermore, when assembling, simply inserting the push button 2 to which the gasket 10 is fixed is inserted into the switch body 1, and the support portion 10C of the gasket 10 comes into contact with the annular stepped portion 1A of the switch body 10 and joins, simplifying the assembly process. become. Moreover, Patsukin 1
0 is provided to bridge the holder part 2A and the switch body 1, and the support part 10C is pressed to the annular stepped part 1A by the elastic force of the packing 10 itself, so it is completely waterproof, oil-proof, and Can be dust-proof.

2 and 3 respectively show other examples of the packing used in the present invention, and the packing 22 in FIG.
1 has a fixed part 22A, a movable part 22B, and a support part 22C, which are similar in overall shape to the one in FIG. This allows for reliable locking by the annular stepped portion 1A.

On the other hand, the packing 23 in FIG.
are integrally formed, and the support portion 23C
In this case, a partially cut out acyclic metal ring 25 is insert-molded, and in addition to obtaining the same effect as the one in Fig. 2, the metal ring 25 is made to have elasticity. .

<Effects of the invention> As detailed above, according to the waterproof push button switch of the present invention, the waterproof ring-shaped gasket is attached to the fixing part on the inner peripheral edge that is fixed to the holder part of the push button, and the annular step on the switch body. The support part of the outer periphery that is joined to the support part is integrally connected to these parts through a thin movable part that is folded back in the pushing direction of the push button, so that when the push button is moved, There are no sliding parts in the seal of the waterproofing means, and only the moving parts deform, so the load is very light.
An extremely good operational feel can be obtained.

In addition, the seal is provided to span the holder part and the switch body, and the pushing force of the push button presses the support part strongly against the annular step part, further increasing waterproofness, so complete waterproofing is achieved. It will be done. Furthermore, since the gasket is fixed only to the holder of the push button, the holder only needs to be replaced when replacing the gasket.
Compared to a closed type switch, the switch body can be used in common by simply changing the holder part, making it easy to manage parts inventory and significantly reducing costs. Furthermore, when pulling out the push button holder in the opposite direction to the switch body, the supporting part of the seal only connects to the annular stepped part in the pushing direction, so almost no load is applied, so a large force is not applied. It can be easily pulled out without needing to be removed, making maintenance easy. In addition, by inserting the push button with the gasket fixed into the switch body, the support part of the gasket joins to the annular step of the switch body, making it easy to assemble. There is an advantage that Furthermore, since the gasket is an integrally formed product, the cost is reduced.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of one embodiment of the waterproof push button switch of the present invention, FIGS. 2 and 3 are longitudinal cross-sectional views and plan views showing other examples of the seal according to the present invention, and FIGS. FIG. 6 is a longitudinal sectional view of a portion of a conventional waterproof push button switch. 1...Switch body, 1A...Annular step, 2...
...Push button, 2A...Holder part, 10, 22.23...
...Packskin, 10A, 22A, 23A...Fixed part, 10B, 22B, 23B...Movable part, 10
C, 22C, 23C...Support part, 11...Concave groove.

Claims (1)

[Scope of utility model registration request] It comprises a switch body and a push button movably mounted inside the switch body, and a waterproof ring-shaped packing interposed between the switch body and a holder part which is a pressing part of the push button is attached to the inner peripheral edge. a fixing part that is formed in a groove and fitted into a groove around the holder part; A thin movable part extends to a position near the switch body, and a flange-shaped part protrudes outward from the end of the movable part to push the push button in the pushing direction by its own elastic force against the annular stepped surface of the switch body. 1. A waterproof push button switch characterized by having a shape in which a support part and a support part are integrally formed.