JPH058706Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a mounting device for fixing a printed wiring board to an instrument case for a vehicle, etc., and more specifically to a mounting device for fixing a flexible printed wiring board to an instrument case having a step. .

Generally, inside the instrument case, there are instruments that indicate the driving status of the vehicle, such as a speedometer with a speed alarm function, an engine tachometer, a fuel gauge, and a temperature gauge, as well as the oil pressure status, door opening/closing status, and handbrake operation status. , a central warning device that centrally displays various vehicle conditions such as the upward lighting status of the headlights, etc., and display devices such as the electric instrument central warning device or lighting lamps are installed in the vehicle. Electricity is now supplied from the battery via an electric cable. In that case, a printed wiring board with a predetermined conductive circuit pattern is attached to the back of the instrument case, the electrical cable is electrically connected to the printed wiring board, and the printed wiring board is further connected to the electrical meter/display lamp, etc. electrically connected to the lighting equipment.

By the way, in recent years, flexible synthetic resin films such as polyester have been used for the printed wiring boards, so even if there is a step in the instrument case, the printed wiring board can be easily attached along the step. I'm getting used to it. However, while the use of a flexible printed wiring board has the advantages mentioned above, if the flexible printed wiring board is installed along a step, the flexible printed wiring board at the step part will not line up neatly with the surface of the step, and the meter will not fit properly. The printed wiring board protrudes from the surface of the case and bends locally.
Alternatively, the wire may break due to being pressed by another device, or may come into electrical contact with another electrical device, causing a malfunction.

The purpose of this invention is to provide a flexible printed wiring board mounting device that can solve the above-mentioned problem that occurs when a flexible printed wiring board is placed along the level difference in an instrument case. A flexible printed wiring board with a conductive circuit pattern is attached and held along the step formed on the back or side surface of the instrument case, and electrical equipment is installed outside the instrument case, with insulation covering the electrical equipment. In addition to installing a protective cover, this insulating protective cover
A printed wiring board regulating part that is located at the step part and clamps the flexible printed wiring board of this step part between the step part and prevents the flexible printed wiring board from lifting up is integrated in the horizontal direction along the step surface. This is due to the fact that it is formed protrudingly.

Next, an embodiment based on the above characteristics will be described with reference to the accompanying drawings.

1 and 2 are perspective views of the instrument case viewed from the back side, in which a flexible printed wiring board 2 on which a conductive circuit pattern 2a is formed is attached along a step 1a formed on the back surface of the instrument case 1. At the same time, flexible printed wiring board 2
An electric device 3 is installed on the back side of the instrument case 1 to which the electric device 3 is attached with screws.

Further, the electrical equipment 3 is covered with an insulating protective cover 4, and this protective cover 4 has the step 1
Regulating portions 5, 5a of the printed wiring board located at point a to prevent floating of the flexible printed wiring board 2 of the stepped portion 1a are integrally protruded laterally along the surface of the stepped portion 1a. Although FIG. 1 shows a flat regulating portion 5 and FIG. 2 shows a comb-like regulating portion 5a as an example, their form may be changed as appropriate, and they may be reinforced with ribs as necessary. good.

Figures 3 to 7 show the condition of the flexible printed wiring board at the stepped portion, respectively.
3, 4, and 5, when the electrical equipment 3 is installed on the lower surface of the step 1a, FIGS.
The figure shows an embodiment in which the electrical equipment 3 is provided on the top surface of the step 1a, and each regulation part 5 is close to and parallel to the top surface of the step 1a, and the flexible printed wiring board 2 of the step portion is placed on the top surface of the step 1a. The situation appears to be in line with the above. In that case, step 1a
Although a slight surplus portion 2b of the flexible printed wiring board 2 is formed at the corner of the step 1, there is little problem since it does not rise outward from the step 1a. As shown in FIG. 5 and FIG.
may be provided. Therefore, when the electrical equipment 3 is covered with the insulating protective cover 4 integrally formed with the regulation part 5, the flexible printed wiring board 2 at the step 1a is sandwiched between the surface of the step 1a and the regulation part 5, and the Since the floating is regulated, it is simple, and problems such as disconnection of the flexible printed wiring board 2 at the step portion 1a can be prevented.

As described above, the present invention is to attach and hold a flexible printed wiring board with a conductive circuit pattern formed along the step formed on the back or side surface of an instrument case, and to place electrical equipment outside the instrument case. At the same time, an insulating protective cover is provided to cover the electrical equipment, and a flexible printed wiring board located at the stepped portion is sandwiched between the insulating protective cover and the stepped portion to perform flexible printing. The regulation part of the printed wiring board that prevents the wiring board from lifting up is integrally formed to protrude laterally along the step surface, so that by attaching the above-mentioned protective cover for electrical equipment installed outside the instrument case, the step part can be fixed. Since the flexible printed wiring board is adjusted at the same time, it is easy to assemble it, and it is also possible to protect the flexible printed wiring board placed on the stepped portion. Further, since there is no need to provide a separate regulating member, the number of parts can be reduced.

In addition, after assembly, for example, when installing an instrument case with a flexible printed wiring board attached to a vehicle's instrument panel, by preventing the flexible printed wiring board located at the stepped part of the case from lifting up, it will not be pressed against the vehicle's equipment. Even if an attempt is made to do so, such a problem can be avoided since it is protected by the regulating portion, and thereby an accident of disconnection of the conductive circuit pattern portion can be prevented.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of this invention, and Figures 3~
FIG. 7 is a sectional view of essential parts showing each embodiment. 1... Instrument case, 1a... Step, 2... Flexible printed wiring board, 2a... Conductive circuit pattern, 3... Electrical equipment, 4... Protective cover, 5,
5a...Regulation section.

Claims (1)

[Scope of utility model registration request] A flexible printed wiring board with a conductive circuit pattern is attached and held along the step formed on the back or side of the instrument case, and electrical equipment is installed outside the instrument case, covering the electrical equipment. In addition to disposing an insulating protective cover, the insulating protective cover is located at the stepped portion to sandwich the flexible printed wiring board in the stepped portion between the insulating protective cover and the stepped portion to prevent the flexible printed wiring board from lifting up. A mounting device for a flexible printed wiring board, characterized in that a regulating part of the printed wiring board is integrally formed to protrude laterally along a stepped surface.