JPS6321067Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a switch mounting device used for mounting an operating switch of an electronic musical instrument.

Figure 1 shows a general electronic musical instrument.
Attached to both sides of the upper and lower keyboards 1 are operation panels 2 equipped with operation switches 3 for controlling musical tones and adding various effects.

In recent years, in order to reduce the amount of wiring required for the operation switch 3, there has been a general tendency to wire the operation switch 3 all at once using copper foil on a printed circuit board.

FIGS. 2 to 4 show such a conventional switch mounting device, in which a relatively long switch chassis 4 to which a plurality of switches 3 are mounted is attached to both ends of a window 8 provided in a switch mounting bracket 5 using screws 6. A printed wiring board 7 is mounted on the lower surface of the switch mounting bracket 5 at a predetermined interval. The legs 10 of the switch 3 pass through the printed circuit board 7 and are soldered to the copper foil 9 on the back side. The switch mounting bracket 5 is fixed to the lower surface of the operation panel 2 with a mounting screw 11.

However, such a structure has the following disadvantages. That is, when the switch 3 is attached to the switch mounting bracket 5 via the switch chassis 4 and the legs 10 of the switch 3 are soldered to the copper foil 9 of the printed circuit board 7, the printed circuit board 7 often warps due to heat. , the result is switch 3
A gap a as shown in FIG. 4 is generated between the lower surface of the printed circuit board 7 and the upper surface of the printed circuit board 7. When the switch 3 is pushed from above with a force P in this state, most of the force is absorbed by the switch chassis 4, but the switch chassis 4 also bends, especially near the center of the switch chassis 4. As a result, force is applied directly to the soldered portion between the leg 10 of the switch 3 and the copper foil 9 on the bottom surface of the printed circuit board 7, causing the soldered portion to come off or the copper foil 9 to be lifted off the printed circuit board 7, resulting in contact. This may cause malfunctions such as defects and sound dropouts.

The present invention provides a switch mounting device that solves these problems.

5 and 6 show an embodiment of the present invention, and parts having the same reference numerals as in FIGS. 1 to 4 have the same functions. Approximately at the center of the window 13 of the switch mounting bracket 12, a support piece 14 is provided which includes a horizontal portion 14a that receives the lower surface of the switch chassis 4, and an inclined portion 14b extending from both sides of the horizontal portion 14a to the upper surface of the switch mounting bracket 12. is formed integrally with the switch mounting bracket 12.

In the case of the above embodiment as well, the printed circuit board 7 is warped due to heat during soldering, and a gap a is generated between the lower surface of the switch 3 and the upper surface of the printed circuit board 7. However, in this case, when the switch 3 is pressed from above with a force P, the support piece 14 formed on the switch mounting bracket 5 supports this force, and no force is directly applied to the printed circuit board 7. Therefore, situations such as the copper foil 9 floating or the soldered portion being peeled off will not occur.

Although the above example was applied to an electronic musical instrument, it is generally applicable to a case where a long switch chassis is mounted away from a printed circuit board, and the switch legs provided on this switch chassis are soldered directly to the copper foil of the printed circuit board. A similar effect can be obtained.

As described above, the present invention provides a switch in which switch mounting brackets are attached to a printed circuit board at predetermined intervals, both ends of a switch chassis are attached to both ends of the window provided in the switch mounting bracket, and a plurality of switches are attached to the switch chassis. In the mounting device, the legs of the switch are soldered to the copper foil of the printed circuit board, and a support piece is integrally provided between both ends of the window of the switch mounting bracket in a direction perpendicular to the mounting direction of the switch chassis, Since the piece supports the bottom surface of the switch chassis, it definitely prevents problems such as the soldered part between the switch leg and the copper foil coming off or the copper foil lifting due to operating force applied to the switch. Moreover, since the support piece can be formed at the same time as the switch mounting bracket is processed, it is extremely advantageous in terms of manufacturing and cost.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a typical electronic musical instrument; Figure 2 is a perspective view of a typical electronic musical instrument;
Figures 3 and 4 are an exploded sectional view, an exploded perspective view, a side view, and Figures 5 and 6 showing a conventional switch mounting device.
The figures are an exploded perspective view and a side view of one embodiment of the present invention. 3...Switch, 4...Switch, 7
...Printed circuit board, 8...Legs, 9...Copper foil, 12
...Switch mounting bracket, 13...Window, 14...Support piece, 14a...Horizontal part, 14b...Slanted part.

Claims (1)

[Scope of utility model registration request] In a switch mounting device in which switch mounting brackets are mounted on a printed circuit board at predetermined intervals, both ends of a switch chassis are mounted on both ends of windows provided in the switch mounting bracket, and a plurality of switches are mounted on the switch chassis, the legs of the switch is soldered to the copper foil of the printed circuit board, and a support piece is integrally provided between both ends of the window of the switch mounting bracket in a direction perpendicular to the mounting direction of the switch chassis, and the support piece supports the lower surface of the switch chassis. A switch mounting device designed to do so.