JPH0132261Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operating device for operating an electrical component such as a tact switch that is directly attached to a printed circuit board or the like from a front panel spaced a predetermined distance from the printed circuit board.

A conventional device of this kind will be explained with reference to FIG. 1. Reference numeral 1 denotes a front panel of an electronic device, 2 a printed circuit board, and an electric component, ie, a tact switch 3 in this example, is attached to one side of the printed circuit board. 3a is the movable part, which is switched on (or turned off) by pushing it toward the board 2 side, and when released, returns to its original state by the internal spring, and is then turned off (or turned off). or on). Note that this stroke is small, and in practice is from several mm to 1 mm or less.

4 indicates the operating device as a whole. This will be explained below. Reference numeral 5 is a front plate made of a resin material such as ABS resin or polypropylene, and a cylindrical holder 6 is formed behind it. The holder 6 has a rectangular cross section or a circular cross section. One side plate 6a of holder 6
is formed separately from the other side plates, and a claw or hook portion 7 is formed at its free end (rear end) facing inward. At least one hook portion 7 is provided for each holder 6. These front plate 5, holder 6, and hook portion 7 are formed as a continuous integral piece.

The operation piece 8 is inserted into the holder 6 by elastically opening the side plate 6a, that is, the hook portion 7 outward. This operation piece 8 has a rod shape as a whole, and its tip is connected to a through hole 5a formed in the front plate 5.
It penetrates through and protrudes forward, and the rear end is connected to the holder 6.
is protruded from behind. A flange 9 is formed in the center, and a spring 10 is interposed between the flange 9 and the inner surface of the front plate 5, whereby the operating piece 8 is biased rearward, and the operating device 4 is pushed upward. When it exists alone, the hook portion 7 prevents the operation piece 8 from moving rearward. Therefore, the spring 10 receives its elasticity by the front plate 5 and the hook portion 7.

Such an operating device 4 is attached to the front panel 1 with the rear end of the operating piece 8 facing the switch 3. At this time, as is clear from FIG. In the peripheral part 5b of the front plate 5 of No. 4, there is a hole 11 for punching out the die for molding, so-called press-cutting hole 11, close to the operation piece 8. In this case, the front panel 1 must be brought close to the operation piece 8, which has the disadvantage that it tends to spoil the overall appearance, and the adhesive used when attaching the operation device 4 to the front panel 1 is The agent 12 enters the holder 6 through the communication portion between the press-cutting hole 11 and the through hole 5a and attaches to the spring 10,
Alternatively, there is a risk that the operating piece 8 and the holder 6 may become attached to each other, causing adverse effects. In addition, in the state shown in Figure 1, the return force of switch 3 itself is
When P ₁ and that of spring 10 are P ₂ , P ₁ >
P ₂ is selected, and the stroke of the operating piece 8 in its natural state, that is, the distance l between the board-side surface of the flange 9 of the operating piece 8 and the inner surface of the hook 7 of the holder 6 is slightly larger than the stroke of the switch 3. selected.

The present invention avoids such drawbacks, and in the explanation of FIG. 2 and subsequent figures, corresponding parts to those in FIG. 1 will be given the same reference numerals and their explanation will be omitted.

That is, the switch operating device according to the present invention is formed by integrally forming a front plate 5 and a cylindrical holder 6, and the front plate 5 has a central portion (appearance surface) 5c that protrudes forward on its front side. , and a peripheral portion 5b that functions as a mounting surface for the front panel 5 as described later. The holder 6 protrudes rearward from the center of the rear surface of the front plate 5, at a position corresponding to the central portion 5c in the illustrated example. One side plate 6 of this holder 6
A is formed to be separated from the other side plates in the middle and functions as a so-called elastic piece, and also functions as a so-called locking piece with a claw or hook portion 7 formed at its rear end projecting outward. It is done like this.
In the illustrated example, this one side plate 6a has two parts for the holder 6.
They are placed opposite each other.

The center portion 5c of the front plate 5 has two through holes 5a at its center. Further, the peripheral portion 5b of the front plate 5
Each has a punching hole 11 at a position facing the hook portion 7 of the one side plate 6a.

Two operating pieces 8 are inserted into the holder 6. The tip of each operation piece 8 penetrates each through hole 5a of the front plate 5 and projects forward, and each operation piece 8
The rear end of the holder 6 is projected to the rear of the holder 6. A flange portion 9 is formed approximately at the center in the lateral direction of the operation piece 8, and a spring 10 is interposed between the flange portion 9 and the inner surface of the front plate 5. One side plate 6 of the holder 6
A stopper plate 13 is disposed between the hook 7 of a and the rear end of the flange 9 of the operating piece 8, and when the operating device 4 is present alone, the flange 9 is prevented by the backward deflection of the spring 10 relative to the flange 9. Movement to the rear beyond the hook portion 7 is prevented.

When attaching the operating device 4 having the above configuration to the front panel 5, the pair of hooks 7 are first bent inward and inserted into the insertion holes 14 provided in the stopper plate 13.
At this time, as the hook portion 7 returns to its original position, the stopper plate 13 is locked by the hook portion 7 and is firmly attached to the holder 6. Note that 15 is a through hole for allowing the rear end of the operating piece 8 to protrude rearward. Then, by fixing the peripheral portion 5b of the front plate 5 to the back surface of the front panel 1 via the adhesive 12, the installation of the operating device 4 is completed.

Furthermore, in the present invention, when the return force of the switch 3 is P ₁ and that of the spring 10 is P ₂ , P ₁
> P ₂ , the stroke of the operating piece 8 in its natural state, that is, the distance l between the surface of the flange 9 of the operating piece 8 on the board side and the surface of the stopper plate on the front panel side is slightly smaller than the stroke of the switch 3. Highly selected.

According to the operating device based on the present invention, since the hook portion 7 is directed outward, the punching hole 11 of the mold when molding the hook portion 7 is the second
As is clear from the figure, the front panel 1 is completely separated from the central portion (presentation surface) 5c and the through hole 5a, and is formed at a sufficient distance from the operating piece 8. Rather, it is sufficient to bring it to a sufficiently distant position, so that the front plate 5 of the operating device 4 itself can be used as a decorative plate.
Moreover, since the press-cutting hole 11 and the through hole 5a do not approach or communicate with each other, the adhesive 12 does not enter into the holder 6 through the through hole 5a. Therefore, the conventional drawbacks explained in FIG. 1 can be avoided.

Moreover, since the coil spring 10 serves as a cushion when the operating piece 8 returns, no abnormal noise is emitted to the surroundings.

[Brief explanation of the drawing]

FIG. 1 shows an example of a conventional operating device, and FIG. 1A is a sectional view thereof, and FIG. 1B is a view of the holder shown in FIG. Figure 2 shows an example of the operating device according to the present invention; Figure A is a sectional view thereof, Figure B is a view of the holder in Figure A viewed from the rear, and Figure C is a part of the operating device. It is an abbreviated perspective view. 5 is a front plate, 6 is a holder, 7 is a hook portion, 8 is an operating piece, 13 is a stopper plate, and 3 is a tact switch.

Claims (1)

[Scope of utility model registration request] A cylindrical holder is integrally formed in the center of the rear surface of the front plate made of a resin material so as to protrude rearward, and a plurality of hooks are further provided at the rear end of the holder to integrally protrude outward. In addition, the front plate has a push-cut hole at a position opposite to the plurality of hooks on the periphery of the front plate, and an operation piece is inserted into the holder and its tip passes through the through hole of the front plate. At the same time, the rear end is made to protrude rearward from the holder so as to come into contact with the movable part of the switch element, and a stopper plate is passed between the plurality of hooks and is held by the plurality of hooks. A coil spring is inserted into the holder to bias the operating piece in one direction so as to surround the operating piece, and the coil spring is interposed between the front plate and the flange of the operating piece, and the panel of the electronic device is fixed. A switch operating device comprising a peripheral part of the opening provided in the front plate and a peripheral part of the front surface of the front plate bonded together with an adhesive.