JPS6228066Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention arranges a printed wiring board in the housing of instruments for vehicles, ships, etc., and is used for night lighting of instruments, display lighting for vehicle equipment, marine equipment, etc. The present invention relates to an improved structure of a conductive part formed on a printed wiring board that is electrically connected to a lamp lighting device that performs.

[Prior art]

Generally, inside the housing of instruments such as automobiles,
Intensive monitoring of various vehicle conditions such as speedometer, engine tachometer, fuel gauge, temperature gauge, and other instruments that indicate vehicle driving conditions, engine oil pressure status, door opening/closing status, handbrake operation status, headlight upward lighting status, etc. A central warning device is installed to display the central warning device, and a night illumination lamp for each of the above-mentioned instruments is installed, and the display devices and lighting lamps for the above-mentioned instruments and central warning device are connected to the vehicle battery via an electric cable. In this case, it is electrically connected to a printed wiring board on which a predetermined conductive circuit pattern is formed in contact with the back side of the housing of the meter, and then from the printed wiring board to each of the electric meters and display devices. , connected to lighting equipment such as lamps.

By the way, in recent years, the above-mentioned printed wiring boards have been made of highly flexible synthetic resin films such as polyester, so that they can be easily installed along the steps on the back of the housing, and are now used for lighting lamps and indicator lamps for intensive warning devices. When electrically connecting the lamp socket and the above-mentioned flexible printed wiring board, a wedge base type lamp socket is generally used.A mounting hole for attaching the wedge base type lamp socket is formed in the housing, and the flexible printed wiring board is attached along the housing. A conductive tongue drawn and formed from a flexible printed wiring board is formed to protrude above the mounting hole, and the lamp socket includes a pair of terminals for electrical connection with the thin lead wire of the wedge base lamp. A contact piece is formed on the pair of terminals to electrically connect with the conductive tongue piece of the flexible printed wiring board, the lamp socket is inserted into the mounting hole, the lamp socket is attached to the housing, and the conductive tongue piece is inserted into the mounting hole. The conductive tongue is bent and the contact piece of the lamp socket is pressed against the conductive tongue to establish electrical continuity.

[Problem that the invention attempts to solve]

However, a pair of contact pieces formed on the lamp socket are opposed to a pair of conductive tongue pieces formed on a flexible printed wiring board, and the lamp socket is inserted into the mounting hole of the housing, so that the socket installation and electrical wiring can be performed at the same time. Therefore, the position of the conductive tongue disposed on the housing must be determined visually before installation, which is cumbersome to assemble, and in some cases, incorrectly assembling the tongue may lead to failure of energization of the lamp socket.

[Means to solve the problem]

This idea solves the above problem, and
forming a mounting hole in the housing for attaching the lamp socket, arranging a flexible printed wiring board along the housing, and protruding a pair of conductive tongues drawn and formed from the flexible printed wiring board over the mounting hole; A pair of terminals electrically connected to the lamp are housed in the lamp socket, a contact piece is formed on the pair of terminals to electrically connect with the conductive tongue piece of the flexible printed wiring board, and the lamp socket is inserted into the mounting hole. The lamp socket was attached to the housing, and the conductive tongue was bent over the inner wall of the mounting hole so that the contact piece of the lamp socket was pressed against the conductive tongue through the inner wall of the mounting hole to establish electrical continuity. In the flexible printed wiring board, the mounting hole is formed in the shape of an even number of polygonal square holes, and the cylindrical portion of the lamp socket is formed in a shape commensurate with the square hole of the mounting hole. The flexible printed wiring board is characterized in that a pair of conductive tongues on an anode side and a cathode side are formed to protrude from the inner wall portions of the holes at positions facing each other.

[Effect]

To attach and secure the lamp socket to the mounting hole of the housing, contact the pair of contact pieces of the lamp socket with the conductive tongue pieces bent on the inner wall of the even-numbered polygonal mounting hole and forming a pair on the anode side and the cathode side. The lamp socket can be electrically conductive and can be easily assembled without being restricted in the mounting direction of the lamp socket.

〔Example〕

Embodiments of this invention will be described below based on the accompanying drawings.

Figures 1 to 5 show an embodiment of this invention, and although not shown in the instrument housing 1 of the automobile, there are devices such as a speedometer, engine tachometer, fuel gauge, and temperature gauge that monitor the driving status of the vehicle. Contains the instruments that give instructions. Although not shown, a central warning device is incorporated that centrally displays various vehicle conditions such as engine oil pressure detection, door opening/closing status, handbrake operation status, and upward lighting of headlights.

Also, on the back side of the housing 1, the housing 1
A flexible printed wiring board 2 for instrument wiring is attached along the wiring board 2, and the wiring board 2 has a conductive part electrically connected to the connection terminal of the instruments, and a wedge-based lamp socket 3 used for instrument lighting or display lighting. A conductive part 4 is formed to be electrically connected to the side, and a conductive circuit pattern 5 is formed by being routed from this conductive part 4. This conductive circuit pattern 5 is connected to an electric cable wired from a battery (not shown) via a coupler or the like. It is wired.

Further, the housing 1 is formed with a mounting hole 6 at a suitable location for mounting and fixing the wedge-based lamp socket 3 used for instrument lighting and display lighting. As shown in the figure, the tongue pieces of the conductive portion 4 forming a pair of anode side and cathode side formed by extending from the conductive circuit pattern 5 above the mounting hole 6 in pairs on the left and right inner wall portions 6A side of the mounting hole 6. 4A is formed to protrude. In addition, the upper and lower inner wall portions 6B of the mounting hole 6 are paired, and the tongue piece 4B of the conductive portion 4, which forms a pair of anode and cathode sides, is formed by extending from the conductive circuit pattern 5 above the mounting hole 6 and protrudes. ing.

Further, the lamp socket 3 is formed with a cylindrical portion 8 into which the wedge base lamp 7 is inserted, and a flange 9 is formed on the outer periphery of the main body of the lamp socket 3 so as to be in close contact with the housing 1 side.

Further, in this case, the outer shape of the cylindrical portion 8 of the lamp socket 3 is made into a rectangular shape equivalent to the rectangular shape of the mounting hole 6.

Furthermore, a pair of terminals 11 are included in the lamp socket 3 and are electrically connected to thin lead wires 10 led out from the wedge base lamp 7. A pair of contact pieces 1 electrically connected to the tongue piece 4A or another pair of conductive tongue pieces 4B
2 is formed, and this contact piece 12 has a lead-out hole 13 formed by cutting out a part of the cylindrical portion 8 of the lamp socket 3.
It is formed to protrude outward from.

Therefore, in the present invention, after inserting the wedge base lamp 9 into the lamp socket 3 and holding the thin lead wire 10 of the lamp 7 in contact with the terminal 11, the lamp socket 3 is inserted into the mounting hole 6 formed in the housing 1.
At the same time, the conductive tongues 4A and 4B of the flexible printed wiring board 2, which are stretched over the mounting hole 6 of the housing 1, are bent along the inner surface of the mounting hole 6, and then the lamp socket is inserted. A pair of contact pieces 12 formed on the terminal 11 of the lamp socket 3 are pressed into contact with the pair of conductive tongue pieces 4A from the one anode side and the cathode side via the inner wall portion 6A of the mounting hole 6. can be assembled into the housing 1, and at the same time, electrical continuity can be maintained between the terminal 11 side of the lamp 7 held in contact with the lead thin wire 10 and the conductive circuit pattern 5 side of the flexible printed wiring board 2.

That is, the conductive tongues 4A and 4B of the flexible printed wiring board 2 are formed to protrude from all sides of the mounting hole 6, and each inner wall portion 6 of the mounting hole 6 is formed.
Two sets of conductive tongue pieces 4A, 4 whose anode side and cathode side form a pair with A and 6B facing each other.
By forming B, when the pair of contact pieces 12 formed on the lamp socket 3 are mounted in the mounting hole 6 facing in the left and right directions, the contact pieces 12 can be connected to one pair of conductive tongue pieces 4A. Also, when the contact piece 12 of the lamp socket 3 is installed in the mounting hole 6 with the contact piece 12 facing up and down, the contact piece 12
can be connected to the other pair of conductive tongues 4B, and the pair of conductive tongues 4A and 4B formed in the lamp socket 3 can be connected to the other pair of conductive tongues 4A and 4B provided in the vertical and horizontal directions of the mounting hole 6, respectively. It is possible to assemble the contact piece 12 with either one of the tongue pieces 4A, 4B in such a way that it can be energized without considering the orientation of the contact piece 12, and thus it is possible to construct a lamp socket mounting device with good workability.

For example, even if one of the conductive tongues 4A, 4B is disconnected, the other conductive tongue 4B can maintain the electrical connection with the contact piece 12 of the lamp socket 7, thereby making the lamp socket 7 flexible. There is no need to replace the printed wiring board 2 unnecessarily, and parts can be used effectively.

Note that in one embodiment, the shape of the mounting hole was approximately square, but the mounting hole is made in the shape of a regular polygon such as a hexagon, and the outer shape of the lamp socket is formed in the same hexagonal shape as the shape of the mounting hole. By doing so, the same effects as in the first embodiment can be obtained. Therefore, in this case, the number of pairs of opposing inner wall portions of the mounting hole is three, and it is sufficient to form three pairs of conductive tongues drawn and formed by protruding from the flexible printed wiring board.

[Effect of idea]

As detailed above, according to the present invention, the mounting holes of the housing for mounting the lamp socket are formed in a polygonal shape consisting of an even number, and the conductive holes of the flexible printed wiring board are adjusted according to the number of the inner wall portions of the polygonal mounting holes. By forming the conductive tongue pieces in pairs on the anode side and the cathode side at the positions where the inner wall portions of the mounting holes face each other, the installation direction can be adjusted when installing the lamp socket. It is possible to provide a flexible printed wiring board that can be easily assembled without any selection.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an instrument housing showing an embodiment of this invention, Fig. 2 is a sectional view showing a lamp socket attached to a flexible printed wiring board, which is the main part of Fig. 1, and Fig. 3. 4 is an exploded perspective view showing the lamp socket, FIG. 4 is a sectional view of the main parts shown in FIG. 2 before installation, and FIG. 5 is a plan view showing the flexible printed wiring board and housing before the lamp socket is installed. be. DESCRIPTION OF SYMBOLS 1... Housing, 2... Flexible printed wiring board, 3... Lamp socket, 4... Conductive part, 4A, 4B... Conductive tongue piece, 5... Conductive circuit pattern, 6... Mounting hole, 6A, 6B ……inner wall,
7...Wedge base lamp, 8...Cylinder part, 9...
...flange, 10... thin lead wire, 11... terminal, 12... contact piece, 13... lead-out hole.

Claims (1)

[Scope of utility model registration request] forming a mounting hole in the housing for attaching the lamp socket, arranging a flexible printed wiring board along the housing, and protruding a pair of conductive tongues drawn and formed from the flexible printed wiring board over the mounting hole; A pair of terminals electrically connected to the lamp are housed in the lamp socket, a contact piece is formed on the pair of terminals to electrically connect with the conductive tongue piece of the flexible printed wiring board, and the lamp socket is inserted into the mounting hole. The lamp socket was inserted into the housing, and the conductive tongue was bent over the inner wall of the mounting hole so that the contact piece of the lamp socket was pressed against the conductive tongue through the inner wall of the mounting hole to establish electrical continuity. In flexible printed wiring boards,
The mounting hole is formed in the shape of a polygonal square hole with an even number, and the cylindrical portion of the lamp socket is formed in a shape commensurate with the square hole of the mounting hole, so that the inner wall portions of the square mounting hole are opposite to each other. 1. A flexible printed wiring board characterized in that a pair of conductive tongues on an anode side and a cathode side are formed in protruding positions at the positions where the anode side and the cathode side are connected, respectively.