JP3114173B2 - Operation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device, and more particularly to an operating device such as a reset knob of an electronic trip meter of a vehicle and a knob mounted on a timepiece.

[0002]

2. Description of the Related Art A conventional operating device of this type is disclosed in Japanese Utility Model Laid-Open No. 2-1
As shown in Japanese Patent Publication No. 01431, a case, a cover for covering the bottom of the case, and a circuit board which is housed inside the case and the cover and is spaced apart from the bottom of the case to be horizontally housed and fixed. A switch is provided on the circuit board so as to be electrically connected to the conductive portion, and a knob having an elastic piece corresponding to the switch is provided on the case so as to be movable up and down. When the push operation is performed from below, the knob moves downward to turn on the switch, and when the push operation of the knob is released, the knob is returned by the restoring force of the elastic piece. Further, a projection for supporting the circuit board integrally provided on the bottom surface of the cover corresponding to the switch is provided, and even if a force is applied to the circuit board via the switch by the operation of pressing the knob, the circuit board can be removed. The deflection is prevented by the projection.

[0003]

In the prior art, since the projection for supporting the circuit board integrally provided on the bottom of the cover corresponding to the switch is provided, the knob is pressed. In the case where the projections prevent the circuit board from being bent even when a force is applied to the circuit board via the switch, the cover forming the projections is made of a soft material. By pressing the knob, the cover itself is deformed, whereby the circuit board is bent, and as a result, the circuit board is easily deformed and cracked, and the pressing force applied to the knob by a finger is reduced. There is also a problem that the operation feeling of the switch is poor because it is absorbed by the bending of the circuit board. In addition, there is a case where a relatively large circuit board has a tendency to bend so much and hinders.

Accordingly, an object of the present invention is to provide an operating device which prevents deformation and cracking of a circuit board and has a good switch operation feeling.

[0005]

According to the present invention, in order to achieve the above object, a case, a cover for covering the bottom of the case, and housed inside the case and the cover are fixed to the case bottom. A circuit board, a switch provided on the circuit board, a knob provided on the case corresponding to the switch, and an abutment on the circuit board corresponding to the switch and integrally formed on the bottom surface of the cover. A protrusion formed to protrude, and a fixing portion for fixing the cover to the case side, wherein the protrusion is brought into contact with the circuit board, and the case and the cover are fixed by the fixing portion. In this case, a force in the direction of the circuit board is applied to the protrusion by bending the bottom surface.

Further, at least one fixing portion is provided near the protrusion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An operating device according to the present invention includes a switch 7 provided on a circuit board 4 housed inside a case 1 and a cover 15, and a case 1 corresponding to the switch 7.
And a projection 19 formed on the bottom surface of the cover 15 so as to abut on the circuit board 4 corresponding to the switch 7. The projection 19 abuts on the circuit board 4. At the same time, the case 1 and the cover 15 are fixed by the fixing portion 18, the bottom surface of the cover 15 is bent, and a force in the direction of the circuit board 4 is applied to the projection 19 to support the circuit board 4.

Further, at least one fixing portion 18 is provided near the projection 19.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show one embodiment of the present invention.

Reference numeral 1 denotes a case made of a synthetic resin, and a plurality of bosses 2 and positioning pins 3 are protruded from the back surface of the case 1. The boss 2 has a screw hole. Reference numeral 4 denotes a circuit board. The circuit board 4 has a hole 5 corresponding to the boss 2 and the positioning pin 3. A screw 6 is inserted into the hole 5 with the positioning pin 3 inserted into the hole 5. The circuit board 4 is fixed horizontally by screwing into the screw holes of the boss 2.

Reference numeral 7 denotes a switch, which is provided on the circuit board 4 so as to be electrically connected to a conductive portion (not shown). Numeral 8 denotes a knob made of synthetic resin disposed on the case 1 corresponding to the switch 7. This knob 8 is an arm piece 1 having a bent portion 9 for urging the knob 8 to the opposite side to the switch 7.
0 and an arm piece 12 having a locking claw 11. The engagement of the locking claw 11 with the locking portion 13 formed on the case 1 prevents the knob 8 from coming off. Knob 8
Is provided with a working shaft 14 that contacts the switch 7.

Reference numeral 15 denotes a cover made of a synthetic resin, and a locking portion 17 provided on the cover 15 is provided on a locking claw 16 provided on the case 1.
Is locked to the case 1, and the circuit board 4 is stored and fixed in a state of floating from the bottom surface of the cover 15. The locking claw 16 and the locking portion 17 constitute a fixing portion 18 for fixing the cover 15 to the case 1. Reference numeral 19 denotes a projection integrally formed on the bottom surface 20 of the cover 15 corresponding to the switch 7.
Abuts against and supports the lower surface of the.

When the projection 20 is in contact with the circuit board 4, the locking claw 16 and the locking portion 17 constituting the fixing portion 18 are not locked, but the cover 15 is deformed to engage the locking claw 16. By locking the stopper 17, the projection 19 abuts on the circuit board 4, and the bottom surface 20 of the cover 15 bends,
A force for urging the projection 19 in the direction of the circuit board 4 is always applied to the circuit board 4. Thereby, even if the material of the cover 15 is soft, the projection 19 can be surely urged toward the circuit board 4.

By providing at least one fixing portion 18 in the vicinity of the projection 19, since the distance between the projection 19 and the fixing portion 18 is short, the bottom surface 20 is flexibly deformed. The urging force in the direction is increased, and even if the material of the cover 15 is soft, the projection 19 can be more reliably urged toward the circuit board 4. The number of the fixing portions 18 is not limited to one, and a plurality of fixing portions 18 may be provided.

Reference numeral 21 denotes a facing, which covers the front side of the case 1, and reference numeral 22 denotes a transparent cover, which covers the front of the facing 21.

When the operation of pushing the knob 8 from outside is performed, the body of the knob 8 deforms the bent portion 9 of the arm piece 10 and moves downward, and the operation shaft 14 turns on the switch 7 and when the pushing operation is released. The knob 8 returns by the elastic force of the bent portion 9 of the arm piece 10. In this case, pressing the knob 8 causes the switch 7
A force is applied to the circuit board 4 through the opening. However, since the bottom surface 20 of the cover 15 is deformed and is always supported by the projections 19 urged toward the circuit board 4,
The circuit board 4 is prevented from being bent by the pressing operation of the knob 8. In addition, the bottom surface 20 of the cover 15 is already bent even if the cover 15 is formed of a soft material by bending the bottom surface 20 of the cover 15 in advance and urging the protrusion 19 toward the circuit board 4 side. Is deformed, so that it is possible to prevent the cover 15 from being further deformed by the operation of pressing the knob 8, so that the circuit board 4 is easily deformed or cracked, and the pressing force applied to the knob 8 is reduced. It is also possible to prevent a problem that the operation feeling of the switch 7 is poor due to being absorbed by the bending of the circuit board 4.

In this embodiment, the fixing portion 18 is provided on the case 1 and the cover 15 corresponding to the peripheral portion of the circuit board 4. However, the present invention is not limited to the above embodiment.
Case 1 and cover 15 corresponding to the central part of circuit board 4
And may be provided. Further, the fixing portion 18 is not limited to the case 1 and the cover 15. If the fixing portion 18 fixes the cover 15 to the case 1, the cover 1 may be connected to the circuit board 4.
It may be fixed to.

[0018]

As described above, according to the present invention, a case, a cover for covering the bottom of the case, a circuit board housed inside the case and the cover and fixed to the bottom of the case, A switch provided on the board, a knob provided on the case corresponding to the switch, and a protrusion abutting on the circuit board corresponding to the switch and integrally formed on the bottom surface of the cover. A fixing portion for fixing the cover to the case side, the projection is brought into contact with the circuit board, and the case and the cover are fixed by the fixing portion, and the bottom surface of the cover is flexed. By applying a force in the direction of the circuit board to the protrusion, deformation of the cover provided with the protrusion due to knob operation can be suppressed, and deformation and cracking of the circuit board 4 can be prevented. It is possible to obtain an operating device having a good switch operation feeling.

Further, since at least one fixing portion is provided in the vicinity of the protrusion, the distance between the protrusion and the fixing portion is short, so that the force for urging the protrusion toward the circuit board is further increased. And the protrusion can be more reliably biased toward the circuit board.

[Brief description of the drawings]

FIG. 1 is a sectional view of one embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 4 Circuit board 7 Switch 8 Knob 15 Cover 18 Fixing part 19 Projection

Claims (2)

(57) [Claims] 1. A case, a cover covering a bottom of the case, a circuit board housed inside the case and the cover and fixed to the case bottom side, and a switch provided on the circuit board. A knob provided on the case corresponding to the switch, a projection abutting on the circuit board corresponding to the switch and integrally formed on the bottom surface of the cover, and the cover facing the case. A fixing portion for fixing, wherein the projection is brought into contact with the circuit board, and the case and the cover are fixed by the fixing portion to deflect the bottom surface of the cover, so that the projection has a force in the direction of the circuit board. An operating device characterized by adding. 2. The operating device according to claim 1, wherein at least one of the fixing portions is provided near the projection.