JPH0442732Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] This invention relates to an electric meter equipped with a flexible printed wiring board (FPC) on the back side.

[Background of the idea]

FIG. 2 shows a conventional electric meter of this type, which is an electric device 1 equipped with electric meters 2 such as a fuel gauge, a hydraulic pressure gauge, a tachometer, a speedometer, etc. and its storage case 3
The electric meter 2 is operated by a signal via a flexible printed wiring board 4 mounted on the back side of the electric meter 2. Then, in order to connect the wiring to the socket mounting hole 5 provided on the back surface of the storage case 3, a part of the flexible printed wiring board 4 is arranged so as to fit along the surface of the recess 7 formed on the back surface of the storage case 3. A socket (not shown) is attached to the socket attachment hole 5, and a light bulb (not shown) attached to this socket illuminates the dial plate, etc. of the electrical equipment 1. In addition, 8
Case 3 accommodates flexible printed wiring board 4
9 indicates a connector insertion portion.

However, when such a conventional flexible printed wiring board is attached to the back surface of the housing case 3 and a light bulb socket is fitted into the socket mounting hole 5 located in the recess 7, the flexible printed wiring board Since the wiring board 4 must be installed along the recess 7 of the housing case,
The entire flexible printed wiring board 4 is placed in the recess 7.
Since the flexible printed wiring board 4 has to be made larger along the surface thereof, the flexible printed wiring board 4 has a disadvantage of increasing in size and cost. Furthermore, as shown in FIG. 3, a socket 11 to which a connector 12 was connected separately from the wiring board 4 was connected to the light bulb mounting hole 10 of the protrusion 6 provided in the case 3. This poses a problem in that the circuit configuration as a whole becomes complicated.

[Purpose of invention]

This invention was made by paying attention to such conventional problems, and a contact tongue piece 20 is formed by providing a cut 21 in the wiring board 4', and a socket mounting hole 5 is formed in this tongue piece 20. The object of the present invention is to provide an electric meter that can solve the above problems by providing a conductive pattern 23 in contact with the hole 5 and arranging the tongue piece 20 along the recess 7. be.

[Example of idea]

The present invention will be explained in detail below based on the embodiment shown in FIG. A description of the same structural parts will be omitted.

This embodiment has a feature in the structure of the flexible printed wiring board 4' attached to the back surface of the storage case 3, so the structure and operation of the flexible printed wiring board 4' will be specifically explained. . Note that the housing case 3 used in this embodiment is the same as that of the conventional example shown in FIG.

That is, a notch 21 is formed in a part of the flexible printed wiring board 4' to form a contact tongue piece 20 that comes into contact with the light bulb socket mounting hole 5 provided in the recess 7 of the housing case 3. A contact tongue piece 2 formed by the notch 21 is provided.
0, a socket through hole 22 which matches the light bulb socket mounting hole 5 is formed, and a conductive pattern 23 for power supply is patterned.

Therefore, according to the flexible printed wiring board 4' of this embodiment, the contact tongue piece 20 is provided so that the contact tongue piece 20 can come into contact with a required portion of the surface of the recess 7 of the housing case 3. Therefore, the external dimensions of the flexible printed wiring board 4' are not such that it can be bent along the surface of the recess 7 of the housing case 3, but are shaped so that it can be stretched across the recess 7. A power supply pattern 23 is inserted into the socket mounting hole 5 provided in the recess 7.
The outer shape of the flexible printed wiring board 4' can be made into contact with the contact tongue piece 20 having
For example, the external size of the conventional flexible printed wiring board 4 shown in FIG. 2 can be reduced in size, which has the effect of increasing the economical efficiency of the flexible printed wiring board 4'.

[Summary of the idea]

As described above, the present invention includes a housing case 3 in which the electrical equipment 2 is housed, and a flexible printed wiring board 4' attached to the housing case 3.
In an electric meter in which an illumination bulb socket 11 is attached to a stepped portion 7 provided in the housing case 3 to illuminate a transmissive illumination type dial of the electrical equipment 2, a notch is provided in the flexible printed wiring board 4'. 21 to form a contact tongue, and the contact tongue 20 is provided with a socket attachment hole 22 into which the socket 11 is inserted and a conductive pattern 23 connected to the socket attachment hole 22. It is.

[Effect of idea]

Therefore, according to this electric meter, only the contact tongue piece 20 needs to be placed along the step 7, and the main portion of the flexible printed wiring board 4' needs to be attached so as to straddle the step 7. The external size of the printed wiring board 4' can be made smaller compared to the external size of the conventional flexible printed wiring board 4 shown in FIG. It has an enhancing effect.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of an electric meter according to the present invention, and FIGS. 2 and 3 are explanatory diagrams of a conventional example. 4'...Flexible printed wiring board, 20...
... Contact tongue piece, 21 ... Notch, 22 ... Socket through hole, 23 ... Conductive pattern.

Claims (1)

[Scope of utility model registration request] a housing case 3 in which the electrical equipment 2 is housed;
and a flexible printed wiring board 4' attached to the housing case 3, and a light bulb socket 11 is attached to the stepped portion 7 provided in the housing case 3 to provide a transparent illumination type dial plate of the electrical equipment 2. In the electric meter, a cutout 21 is provided in the flexible printed wiring board 4' to form a contact tongue piece 20, and a socket mounting hole 22 into which the socket 11 is inserted into the contact tongue piece 20; An electric meter characterized in that a conductive pattern 23 connected to the socket mounting hole 22 is provided.