JPH0245937Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a push button switch device in which a push button provided on an operation panel operates a push switch provided on a printed wiring board.

[Conventional technology]

As a conventional push button switch device, a protrusion is formed on the back side of a push button provided on an operation panel, and the tip of this protrusion is placed opposite to the operation part of a push switch provided on a printed wiring board, and the protrusion of the push button is used to operate the push switch. There are known devices in which the operating section is operated by pushing.

[Problem that the invention attempts to solve]

By the way, in the case of the above-mentioned push button switch device, if the distance between the printed wiring board and the operation panel is inaccurate, or if the printed wiring board itself is warped, the tip of the protrusion of the push button and the operation part of the push button This will cause an imbalance in the positional relationship.

Therefore, when a large number of pushbutton switch devices are installed in parallel, as in the case of various electronic devices such as recent audio devices, the heights of the pushbuttons relative to the operation panel become uneven, resulting in an unsightly appearance.
When a large number of pushbutton switch devices are installed in parallel, the printed wiring board on which the pushbutton switch is mounted becomes larger, and warping of the printed wiring board can greatly disturb the positional relationship between the pushbutton and pushbutton switch.Moreover, as a recent trend, As the operating stroke of push button switch devices has become smaller, in extreme cases, the protrusion of the push button may continue to press the operation part of the push button without pressing the push button, or conversely, even if the push button is pressed, The protrusion on the push button may prevent the operating part of the push switch from being pushed completely. Therefore, it is necessary to adjust the positional relationship between the tip of the protrusion on the push button and the operating part of the push switch, or to fix the location of the printed wiring board on which the push switch is installed. In either case, it is necessary to correct the warpage of the printed wiring board when fixing the printed wiring board by increasing it, or to correct the warpage of the printed wiring board before fixing the printed wiring board. This has caused problems in terms of workability, design constraints, etc.

This idea was created with these points in mind.
To provide a push button switch device that operates reliably even if the distance between the printed wiring board and the operation panel is inaccurate or the printed wiring board itself is warped, thereby eliminating increased assembly man-hours, deterioration of workability, and This is an attempt to resolve problems such as design constraints.

[Means for solving problems]

In the present invention, a push button 20 is provided on the operation panel 10 so as to be movable by a predetermined stroke, a push switch 42 is provided on the printed wiring board 40, the printed wiring board 40 is fixed to the back side of the operation panel 10, and the push button 20 on the operation panel 10 is This relates to a push button switch device for pushing and operating an operation part 41 of a push switch 42 of a printed wiring board 40, in which a cylindrical part 24 with a press-fit hole 23 is formed on the back side of the push button 20, and the cylindrical part 24 is A press-fit pin 36 is provided with a press-fit protrusion 35 on the outside of the press-fit hole 23 of the portion 24.
One end of the press-fit pin 36 is press-fitted, and the other end of the press-fit pin 36 is disposed opposite to the operating portion 41 of the push switch 42.

[Effect]

In the push-button switch device of the present invention, one end of the press-fit pin 36 is shallowly press-fitted into the press-fit hole 23 of the cylindrical part 24 formed on the back side of the push button 20, and during assembly, for example, the push-button 20 is pushed strongly, and the press-fit pin 36 is pressed into the press-fit hole 23. By pressing the other end of 36 against the operation part 41 of the push switch 42, one end of the press-fitting pin 36 is press-fitted into the press-fitting hole 23 of the cylindrical part 24 of the push button 20, whereby the push button 20 and the push switch 42 are pressed. Based on the state in which the operation part 41 is completely pushed in,
This is to correctly set the positional relationship between the operating section 41 of the push switch 42 and the other end of the press-fit pin 36 of the push button 20.

〔Example〕

An embodiment of the push button switch device of the present invention will be described with reference to the drawings.

Reference numeral 10 denotes an operation panel on the front side of an electronic device, such as an audio device. A rectangular recess 13 is formed in a bulging shape from the center of the bottom 12 of the recess 11 to the rear surface of the operation panel 10, and a plurality of notches 15 are formed in the side wall 14 of the recess 13. A guide tube 18 is formed in the center of the bottom 16 of the concave portion 13 and has a circular through hole 17 that communicates with the front and back sides of the operation panel 10. A plurality of pillars 19 are provided protrudingly.

Reference numeral 20 denotes a rectangular push button. The push button 20 is made of synthetic resin, and has a plurality of locking claws 21 formed near the periphery of its back surface via branch pieces 22, and at the center of its back surface. A cylindrical portion 24 made of a cylinder having a circular press-fit hole 23 is formed in the portion.

The push button 20 has its locking claws 21 movably engaged in each notch 15 of the operation panel 10 so as not to come off, and its cylindrical portion 24 inside the guide cylinder 18 of the operation panel 10. By being slidably fitted into the recess 11 of the operation panel 10, the recess 11 is movable by a predetermined stroke.

Moreover, the press-fit hole 23 of the cylindrical part 24 of this push button 20
One end of a synthetic resin press-fitting pin 36 having an annular pressure-contact protrusion 35 on the outside is press-fitted into the inside, and the press-fit pin 36 presses the push button 20 with its press-contact protrusion 35.
It is held in the press-fit hole 23 of the cylindrical part 24.

Reference numeral 40 denotes a printed wiring board, and a push switch 42 that is opened and closed by pushing an operating section 41 is soldered to this printed wiring board 40.

This printed wiring board 40 is screwed onto the plurality of columns 19 of the operation panel 10 with screws 43 and fixed to the rear side of the operation panel 40. In this state, the operation section 41 of the push switch 42 is pressed against the push button. The other end of the press-fit pin 36 held in the press-fit hole 23 of the cylindrical portion 24 of No. 20 is provided opposite to the other end of the press-fit pin 36 .

Then, the force required to press-fit the press-fit pin 36 into the press-fit hole 23 of the cylindrical portion 24 of the push button 20 is as follows:
The force is set to be larger than the force required to push and operate the operation section 41 of the push switch 42, for example, the push operation force of the operation section 41 is approximately 150.
g, whereas the press-in force of the press-fit pin 36 is approximately 1
It is set to Kg. In addition, push switch 42
Even if the operating portion 42 is pushed and operated with a force not significantly exceeding the pressing force of the press-fitting pin 36 (approximately 1 kg), there is no risk of damage at all.

Therefore, when the push button 20 is pressed with a force of about 150 g or more, the operating portion 41 is pushed through the press-fit pin 36, and the push switch 42 is opened and closed.

Even if the push button 20 is pressed with a force of approximately 1 kg or more, the peripheral portion of the back surface of the push button 20 will come into contact with the bottom 12 of the recess 11 of the operation panel 10 after the operation section 41 of the push switch 42 is pressed.
The press-fitting pin 36 is no longer press-fitted into the press-fitting hole 23 of the cylindrical portion 24 of the push button 20.

Next, assembly will be explained.

First, the printed wiring board 40 is placed on the operation panel 10.
are fixed with screws 43, and one end of the press-fit pin 36 is shallowly press-fitted into the press-fit hole 23 of the cylindrical part 24 of the push button 20. Then, the push button 20 is mounted in the recess 11 of the operation panel 10. If you push it hard, the operating part 41 of the push switch 42 will press into the press-fit pin 36.
After the push button 20 is pressed by the other end, the push button 20 is fixed to the operation panel 10 by the engagement of each locking pawl 21 with each notch 15 and the fitting of the cylindrical portion 24 with the guide tube 18. The press-fit pin 36 is supported so as to be movable in its stroke, and the other end of the press-fit pin 36 is pressed into contact with the operation part 41 of the push switch 42.
One end portion is press-fitted into the press-fit hole 23 of the cylindrical portion 24 of the push button 20, and the peripheral portion of the back surface of the push button 20 comes into contact with the bottom portion 12 of the recess 11 of the operation panel 10, whereby the push button 20 and the push switch The positional relationship between the operating section 41 of the push switch 42 and the other end of the press-fit pin 36 of the push button 20 is set correctly based on the state in which the operating section 41 of the push button 42 is completely pushed in.

The operating section 4 of this push switch 42
1 and the other end of the press-fit pin 36 of the push button 20 is set using the press-fit pin 36 whose one end is shallowly press-fitted into the press-fit hole 23 of the cylindrical portion 24 of the push button 20.
Within the range that can be further press-fitted into the press-fit hole 23,
Correct settings can be made regardless of the warpage of the printed wiring board 40 or the misalignment of the distance between the printed wiring board 40 and the operation panel 10. Moreover, the number of parts is only increased by the number of press-fit pins 36, and the work can be done by moving the push button 20 to the operation panel. Push button 2 when attached to recess 11 of 10
This is very effective when a large number of push button switch devices are installed in parallel, as it is only necessary to increase the pressing force of 0.

Note that when implementing the present invention, the present invention is not limited to the embodiments described above; for example, if the moving direction of the push button 20 can be regulated by the branch piece 22 of the locking claw 21, the guide tube 18 of the operation panel 10 needs to be provided in particular. Instead, in this case, the supporting pieces 22 may be integrated with the cylindrical portion 24 and the locking claws 21 may be formed on the cylindrical portion 24.

[Effect of idea]

As mentioned above, in the push button switch device of the present invention, one end of the press fit pin is shallowly press fit into the press fit hole of the cylindrical part formed on the back side of the push button.
For example, by pressing the push button strongly and bringing the other end of the press-fit pin into pressure contact with the operation part of the push button, one end of the press-fit pin is press-fitted into the press-fit hole of the cylindrical part of the push button. Since the positional relationship between the push switch's operating section and the other end of the press-fit pin of the push button can be set correctly based on the state in which the operating section is completely pushed in, the distance between the printed wiring board and the operating panel can be adjusted. Even if the printed wiring board itself is warped, the push button switch device will operate reliably, and problems such as increased assembly man-hours, deterioration of workability, and design constraints can be avoided in electronic equipment. The positional relationship between the operation part of the push button and the other end of the press-fit pin of the push button can be set by inserting the press-fit pin, one end of which has been shallowly press-fitted into the press-fit hole of the cylindrical part of the push button. Within the range that can be press-fitted into the press-fit hole, regardless of the warpage of the printed wiring board or the misalignment of the distance between the printed wiring board and the operation panel,
This method is very effective when a large number of push button switch devices are installed in parallel, as it can be set correctly and the work is simple as only the number of press-fitting pins is increased.

[Brief explanation of drawings]

The figure is a side view, partially cut away, showing an embodiment of the push button switch device of the present invention. 10...Operation panel, 20...Push button, 23...
Press-fit hole, 24... Cylindrical part, 35... Press-fit protrusion, 3
6...Press-fit pin, 40...Printed wiring board, 4
1...Operation unit, 42...Push switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A push button is provided on the operation panel so that it can be moved by a predetermined stroke, a push switch is provided on the printed wiring board, the printed wiring board is fixed to the back side of the operation panel, and the push button on the operation panel is used to push the printed wiring board A push-button switch device for pushing and operating the operation part of a push button, wherein the push button has a cylindrical part with a press-fit hole formed on the back side, and the press-fit hole of the cylindrical part has a press-contact protrusion on the outside. 1. A push-button switch device, characterized in that one end of a press-fit pin is press-fitted, and the other end of the press-fit pin is disposed opposite to an operating section of the push button switch.