JPS60100400A - Grounding device of operation button - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a grounding device for an operation button, and in particular to an amplifier,
There is one related to a grounding device for an operation button in a stereoscopic I device such as a record player or a record player.

Conventional configurations and their problems In recent years, electronic circuits have been increasingly integrated into ICs in all fields of the SDE industry, and microcomputers have been installed to improve the operability and characteristics of devices. However, this microcomputer is extremely susceptible to static electricity from the outside, and its operating buttons must be completely connected to ground. As an example, a conventional operation button grounding device for a record player will be explained with reference to FIG.

In Fig. 1, reference numeral 1 indicates an operation button made of aluminum or stainless steel, and is equipped with a thin wall portion 2.
It can be swung elastically around the center. The operation button 1 is provided with a protrusion 4, and the operation button 1
A13S with a thin wall portion 5 at a position corresponding to the thin wall portion 2 of
A back plate 3 made of resin or the like is pasted together. Back plate 3
is fixed to the main body 7 of the record shaker A7 by a screw 8 at a bent portion 6 at one end thereof. A switch 9 is disposed on a printed circuit board 10 facing the protrusion 4 of the back plate 3. Therefore, by pressing the operation button 2, the switch 9 can be operated via the back plate 3. Further, an opening 11 is formed in the back plate 3, and one end of the LC grounding temporary 12, which is fixed to a tree 1417 with a screw 13, is brought into contact with the operation button 1 through the opening 11. On the other hand, a lead wire 14 is attached to the other end of the ground plate 12.
One end of the lead wire 14 is soldered (Jj), and the other end of the lead wire 14 is soldered (Jt) to a ground circuit formed on the back surface of the printer 1 to the board 1o. Therefore, the operation button is 1G! , is electrically connected to the ground circuit via the ground plate 12J5 and the lead wire 14.

However, the grounding device C1;L having the above configuration,
Due to a deviation in the position of the ground plate 12, the operating button 1 may not come into contact with the operating button 1, and may not be grounded due to poor continuity. Also, connect the lead wire 14 to the ground plate 1
If solder smeared in two places from the second printer 1 to the board 1o, it would be necessary to hold the lead wire 14 externally at that time, which would increase the manufacturing time and increase the product unit price. There was also the problem that F3U2I strikers were JfLI people.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and thus provides a stable conduction state for operation buttons and ground circuits, as well as reducing manufacturing man-hours and effort. 11 grounding devices for operation buttons that can reduce manufacturing costs? The purpose is to provide.

Structure of the Invention In order to achieve the purpose of opening the coil spring, the present invention provides a first extending portion and a second extending portion at both ends of the coil spring. It is formed into a circular shape and elastically deforms and passes through the engagement hole provided in the grounding object, thereby elastically pressing the second extension part of the engagement holding shield 1 into contact with the operation button. The present invention provides a grounding device for an operation button configured as described above.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. In addition, in this figure, the same parts and months as those in FIG. 1 are given the same reference numerals, and their explanations will be omitted.

The grounding devices shown in FIGS. 2J3 and 3 use a coil spring 20 instead of using a combination of a ground plate and a lead wire. The coil spring 20 has a substantially circular first extending portion 20a and a linear second extending portion 20b at both ends thereof.
What are you thinking? , on the printed board 10 on which electronic circuits including a ground circuit are printed in a pattern, the length is smaller than the diameter of the first extension part 20a of the coil spring 20, and the width is smaller than the diameter of the first extension part 20a of the coil spring 20. The engagement hole 10a is formed with a diameter of 1 and a thickness of J, and a diameter of 2!1.
After the extension part 20a is elastically deformed and inserted into the engagement hole 10e1, the first extension part 20a is inserted into the engagement hole 10e1.
When 0a tries to elastically return to its original position, forces are applied in the directions of arrows A and 3, allowing the spring 20 to stand on its own. In this state, the '1st extension part 20a is held in half to the other electronic circuit components I, 11 to exert a fixing force. On the other hand, the second extension part 20a of the L1 Extension part 20
[) is a certain angle C from the natural state of the imaginary line C small rJ-i
state J, opening 1 of positive face tfi3 with
1 and is pressed against the operation button 1. Therefore, there may be some manufacturing and installation errors, and the operation button 1
is electrically connected to the ground circuit on the printed circuit board 10 via the coil spring 20.

Note that the second extending portion 20b of the coil spring 20 is not necessarily L.
) It is needless to say that it is not necessary to form it in the shape of a white line, and it can be formed, for example, in the shape of a "<" or in a curved shape.

Effects of the Invention As explained above, the operation button grounding device of the present invention includes a substantially circular first extending portion that is elastically engaged and held in an engagement hole formed in an object to be grounded; Since the object and the operation button are electrically connected by using a coil spring having a second extension portion that is elastically pressed against the operation button,
Even if there are manufacturing and phase errors, a stable conduction state can be maintained by 1'7, and the tp manufacturing error can also be reduced, which is an excellent effect.

[Brief explanation of the drawing]

Figure 1 shows a conventional operating button grounding device.
FIG. 2 is a perspective view showing a grounding device for an operation button according to an embodiment of the present invention, and FIG. 3 is an enlarged sectional view of a main part of the device. 1...Operation button, 10...Print 1 to board, 10
a...Engagement hole, 20...Coil spring, 20a...
1st extension part, 20F)... 2nd extension part is good! 11 people α book 6 Hiroshi

Claims (1)

[Claims] 1. A first extension part and a second extension part are provided at both ends of the coil spring, and the first extension part is formed into a substantially circular shape, and the engagement provided on the C1 grounding base object. 1. The second extending portion is configured to be elastically pressed into contact with the operation button by elastically deforming and passing it through the hole to maintain engagement.1. : Grounding device for operation button.