JPS5911384Y2 - Waterproof push button dial switch - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a waterproof push button dial switch.

A conventional waterproof push button dial switch has a push button dial switch 1 as shown in FIGS. 1 and 2.
and a waterproof cover 5 fixed to a panel 4 with a frame 2 and screws 3.

The push button dial switch 1 has a plurality of buttons 6
, a frame body 7 that holds the buttons 6, a movable contact 9 arranged on the rear surface of each button 6 via a support spring 8, and a fixed contact provided on a printed circuit board 10 corresponding to the movable contact 9. 11 and a terminal 12 for making an electrical connection with an external device, and the waterproof cover 5 has a button 13 whose function is indicated to correspond to each button 6 of the push button dial switch 1, and a terminal 12 for making an electrical connection with an external device. The button 13 has a structure including a diaphragm 14 formed around the button 13 to provide a return force, and is entirely made of an elastic material such as rubber.

In the figure, 15 is a metal fitting for mounting the push button dial switch, and 16 is a mounting screw.

With this structure, if you press the button 13 on the waterproof cover 5 with your finger,
The button 6 of the push button dial switch 1 on the rear surface of the button 13 is pressed, the movable contact 9 placed on the rear surface is further pressed and comes into contact with the fixed contact 11, and when the finger is released, a pressing force is applied to the button 13. When the button 13 is released, the button 13 returns to its original state due to the action of the diaphragm 14, and at the same time the button 6 is released.
The movable contact 9 is also returned to its original state by the action of the support spring 8, and the movable contact 9 is separated from the fixed contact 11.

Conventionally, a waterproof cover is provided on the front of the pushbutton dial switch to make it waterproof, which increases the mounting space, which is an obstacle to making the switch thinner, and also requires a large number of assembly parts and assembly man-hours. In addition to increasing costs, the button on the waterproof cover needed to have the same function display as the button on the push-button dial switch.

In addition, the pushbutton dial switch button is pushed indirectly through the button on the waterproof cover, which requires a certain amount of force, which makes it difficult to operate from an ergonomic standpoint. It has the disadvantage that it is susceptible to loss and its operation is unstable.

The present invention is characterized in that a movable contact is arranged on the rear surface of the button of the waterproof cover, and a printed circuit board is mounted on the rear surface of the waterproof cover with a fixed contact corresponding to the movable contact. To obtain a waterproof push-button dial switch which reduces man-hours, etc., reduces thickness and cost, and has good operability.

One embodiment of the present invention will be described with reference to FIGS. 3 and 4. Reference numeral 17 indicates a waterproof cover made of an elastic material such as rubber, 18 a panel, and 19 a printed circuit board. It is fixed to a panel 18, and a printed circuit board 19 is attached to the back surface of the waterproof cover 17 with screws 21.

The waterproof cover 17 has a plurality of buttons 2 whose functions are displayed.
2, and each button 2 in order to give a restoring force to the button 22.
It is equipped with a diaphragm 23 that is shaped around 2,
The diaphragm 23 is clicked when the button 22 is pressed.

In addition, the button 22 of the waterproof cover 17 and the diaphragm 2
By embedding a frame-like rigid reinforcing member 24 made of metal or the like in the form of a waterproof cover 17, as shown in FIG. The waterproof cover 17 as a whole is designed to have a property that is contradictory to the flexibility of an elastic material, that is, to have rigidity as a structure, so that the click operation of the diaphragm 23 is stable when the button 22 is operated.

and a surface opposite to the function display side of each button 22;
That is, on the rear surface of each button 22, a movable contact 25 formed in advance with a conductive rubber tip is fixed to the waterproof cover 17 by integrally forming it, and is further spaced from each movable contact 25 with a certain gap. Fixed contacts 26 facing each other are provided on the printed circuit board 19.

In other words, the printed circuit board 19 has fixed contacts 26
is attached to the rear surface of the waterproof cover 17 so as to face the movable contact 25 with a certain gap therebetween.

Note that 27 in the figure is a terminal for connecting with external equipment.

In the above arrangement, when the button 22 of the waterproof cover 17 is pressed with a finger, the movable contact 25 provided on the rear surface of the button 22 comes into contact with the fixed contact 26 provided on the printed circuit board 19.

Then, when the pressing force on the button 22 is released, the button 2
2 is restored due to the shape effect of the diaphragm 23, and the movable contact 25 is separated from the fixed contact 26 accordingly.

In the above embodiment, the movable contact 25 is fixed to the rear surface of the button 22 provided on the waterproof cover 17, but as shown in FIGS. 5 and 6, the movable contact 25 is separated from the button 22 and the button is A support spring 28 or the like may be disposed between the rear surface of the contact 22 and the fixed contact 26.

As explained above, the present invention has a structure in which a movable contact is arranged on the rear surface of the button provided on the waterproof cover, and a printed circuit board with a fixed contact corresponding to the movable contact is attached to the rear surface of the waterproof cover. The purpose of the waterproof cover is not only to be waterproof, but also to function as an operating section, so that the number of parts can be reduced, and the mounting space can be reduced, making it possible to achieve a thinner design.

In addition, the waterproof cover, buttons, movable contacts, etc., which were conventionally made up of individual parts in a pushbutton dial switch, can now be made into one piece, reducing the number of parts and reducing assembly man-hours and costs. This eliminates duplication of function displays.

Furthermore, since the buttons do not have a double structure as in the past, there is no operation loss, stable operation is obtained, and operability is greatly improved.

Furthermore, reinforcing members are embedded in the parts of the waterproof cover excluding the buttons and diaphragm to give the waterproof cover structural rigidity.This rigid part adheres tightly to the printed circuit board, making it reliable. A good sealing effect can be obtained.

Therefore, it can be used as a mechanical component in the operation section of equipment that requires waterproofness and airtightness.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional example, Fig. 2 is a partially cutaway side view, Fig. 3 is a front view showing an embodiment of the present invention, Fig. 4 is a partially cutaway side view, and Fig. 5 is a partially cutaway side view. Front view showing another embodiment, No. 6
The figure is a partially cutaway side view, and FIG. 7 is a perspective view showing an example of the shape of the reinforcing member used in the present invention. 17...Waterproof cover, 19...Printed circuit board, 22
... Button, 23 ... Diaphragm, 24 ... Reinforcement member, 25 ... Movable contact, 26 ... Fixed contact, 2
8...Support spring.

Claims (1)

[Scope of utility model registration request] A waterproof cover having a plurality of buttons and a diaphragm formed around each button to give a restoring force to the buttons is entirely made of an elastic material such as rubber, and
A reinforcing member having rigidity such as metal is buried in the elastic material of the portion of the waterproof cover excluding the buttons and the diaphragm to give the waterproof bar the rigidity as a structure, and movable contacts are provided on the rear surface of each button. Either directly fix the movable contacts supported by support springs, or place the movable contacts supported by support springs apart, and place the printed circuit board with fixed contacts corresponding to these movable contacts under a waterproof cover so that the movable contacts face the fixed contacts with a gap between them. A waterproof push button dial switch that is mounted on the rear surface.