JP2974397B2 - Push-button switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a push-button switch which is illuminated by operation of a control knob so that the switch can be properly operated even in a dark place, and which is effective for an automobile. It is about.

[Conventional technology]

As the structure of this type of conventional push button switch,
There is a structure as shown in FIG. In the figure, 1
Is a frame formed of a hard resin.
Is provided with a switch mounting hole 2. An operation knob 3 formed of, for example, an ABS resin, which is a transparent and hard material, is fitted into the switch mounting hole 2 so as to be able to be pushed.
A hollow rod 4 is integrally attached to the operation knob 3, and a guide light 5 is provided inside the hollow rod 4.
Is located at one end. Reference numeral 6 denotes a printed circuit board having a switch circuit 7. On the printed circuit board 6,
A rubber switch 9 having a movable contact 8 separated from the switch circuit 7 is mounted. Reference numeral 10 denotes a light bulb socket mounted on the printed circuit board 6. The light from the light bulb 11 screwed into the light bulb socket 10 is arranged to be guided to the guide light 5. On the surface of the operation knob 3, there is provided a transmissive illumination unit for characters, patterns, and the like.
Except for 12, a non-transparent paint 13 (light shielding layer) is applied.

In the conventional push button switch configured as described above, the transmitted illumination unit 12 provided to the operation knob 3 by the light guided through the guide light 5 by turning on the bulb 11 is used. Light emission is displayed. Pressing the operation knob 3 deforms the rubber switch,
The contact between the movable contact 8 and the switch circuit 7 is made, and the switch is closed.

[Problems to be solved by the invention]

However, in this conventional push button switch, the operation knob 3 itself is formed of a hard resin,
Due to the lack of flexibility, when this push-button switch is used at an appropriate position of a finisher having surface flexibility in the interior of an automobile, for example, the flexibility of the finisher and the operation knob of the push-button switch 3, the operability of the push button switch is poor, and the gap between the frame 1 and the operation knob 3 is poor in waterproofness and dustproofness. was there.

[Means for solving the problem]

The present invention has been made in view of such conventional problems, and in particular, the surface of an operation knob of a push button switch has a flexible structure, and is operated by matching with a flexible finisher around a mounting portion of the push button switch. It is a first object to provide a push button switch having excellent performance. It is a second object of the present invention to provide a push button switch having excellent waterproof and dustproof properties.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiment shown in FIGS.

In FIG. 1, reference numeral 21 denotes a base frame of a push button switch formed of a hard resin, and a printed circuit board 22 is attached to a lower opening of the base frame 21. A transparent rubber switch 23 made of, for example, silicon rubber or the like and integrated with a transparent rubber switch 23 having a substantially mountain-shaped cross section is superimposed. At the center of the printed circuit board 22, a through hole 25 is formed.
Is arranged. On the upper surface of the printed circuit board 22, a conductive foil 27 which is close to the through hole 25 and serves as a switch circuit is provided.
Is formed, and the rubber switch 23 is located on the conductive foil 27. Inside the rubber switch 23, an annular movable contact 28 corresponding to the conductive foil 27 is always a conductive foil.
It is arranged to be separated from 27. Reference numeral 29 denotes a transparent or light-colored resin plate attached to the upper surface of the rubber switch 23. On the upper surface of the plate 29, printing or painting other than the symbol mark 30 as a light shielding layer 31 is performed. It is a nameplate that is given. Further, a transparent soft resin material 32 is applied from the upper surface of the light shielding layer 31 to the peripheral surface thereof. 33 is a sheet-like soft operating member integrally formed on the upper surface of the base frame 21, and the soft operating member 33 is formed by integrally forming the plate 29 and the soft resin material 32 by insert molding. Is what it is. The soft operation member 33 has a window 34 formed so as not to block the symbol mark 30.

The above is the configuration of the present embodiment, but the operation will be described next.The operation knob is composed of a transparent soft resin material 32 and a plate 29, and by pressing this operation knob, the movable contact 28 is The switching of the switch circuit is performed by contacting the conductive foil 27. Also, by turning on the illumination sphere 26, the illumination light becomes transparent rubber switch 23,
The symbol mark 30 is transmitted and illuminated through the plate 29.

Since the surface of the operation knob in this embodiment is formed of the soft resin material 32, the operability or feel of the operation knob is controlled by the flexibility of the surface of the operation knob and the soft balance with the surrounding soft operation member 33. Is improved.

In the embodiment shown in FIG. 2, a soft operating member 33 is attached from the periphery of a push button switch 35 configured in the same manner as the above embodiment to the lower side thereof, and a projection 36 is formed on the periphery of the lower side surface. I do. The push button switch 35 thus formed
Is fitted into a concave portion 38 formed in a fixed object 37 such as a vehicle body, so that the ridge 36 comes into close contact with the inner surface of the concave portion 38, and the waterproofness or dustproofness of the push button switch 35 is improved. Things.

As described above, in the push button switch of each of the above embodiments, the surface of the operation knob is formed of the soft resin material 32 in substantially the same manner as the soft operation member 33 provided around the push button switch. Therefore, the operability and feel of the operation knob can be enhanced. Further, since the operation knob and the soft operation member 33 are integrally formed by insert molding, they are excellent in waterproofness and dustproofness.

〔The invention's effect〕

As described above, the present invention provides a printed circuit board 22 in which an illumination light source 26 is inserted into an opening 25 and a conductive foil 27 is provided around the opening 25, and is bonded to one side surface of the printed circuit board 22 and A light-transmitting rubber switch member 23 having an annular contact 28 fixedly attached to and detachable from the conductive foil 27; and a rubber switch member 23
A plate 29 having a light-transmitting indicator 30 disposed on the other side thereof and having a surface covered with a transparent soft resin material 32, and a plate 29 integrally formed so that the soft resin material 32 is exposed and Since the push button switch includes the soft operating member 33 that supports the soft operating member 33, the soft resin having the same softness as the soft operating member 33 provided on the surface of the plate 29 on the periphery thereof is provided. Since the material 32 is adhered, the operability and feel of the operation knob are improved, and the effective illumination of the switch is not hindered by the transmissive illumination provided by the translucent index provided on the plate 29. This has the effect of being realized. Further, in the present invention, since the soft transparent member 32 attached to the surface of the plate 29 and the soft operation member 33 provided around the same are integrally formed, the waterproofness and dustproofness of the entire switch are improved. There is also an effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural explanatory view showing an embodiment of a push button switch according to the present invention, FIG. 2 is a structural explanatory view showing another embodiment of the present invention, and FIG. It is a structural explanatory view of a conventional example. 21 Base frame, 22 Printed circuit board 23 Rubber switch 24 Rubber 25 Through hole 26 Lighting sphere 27 Conductive foil 28 Movable contact 29 Plate 30 … Symbol mark 31… Light-shielding layer 32… Soft resin material 33… Soft operating member 34… Window 35… Push button switch 36… Protrusion 37… Fixed object 38… Recess

Claims (2)

(57) [Claims] 1. A push button switch for a vehicle having an operation knob, wherein a transparent operation member having substantially the same flexibility as a soft operation member (33), which is a soft material, is provided on a surface of a plate (29) constituting the operation knob. A push button switch comprising a soft resin material (32). 2. A printed circuit board (22) in which an illumination light source (26) is inserted into an opening (25) and a conductive foil (27) serving as a switch circuit is provided around the opening (25). A light-transmitting rubber switch member (23) joined to one side surface of a printed circuit board (22) and having an annular contact (28) fixed to and detachable from the conductive foil (27); A) a plate (29) having a translucent index (30) disposed on the other side surface and having a surface covered with a transparent soft resin material (32); and the soft resin material (32). And a soft operating member (33) integrally formed so as to expose the plate and supporting the plate (29).