JPS6228067Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is particularly useful for illumination of motorcycle instruments or warning illumination of vehicle equipment that is exposed to the external atmosphere and used in a vibrating atmosphere. This invention relates to an improved structure of a lamp socket device.

[Conventional technology]

In general, motorcycle instruments include instruments that indicate the driving status of the vehicle, such as a speedometer, engine tachometer, fuel gauge, and temperature gauge, as well as indicators that indicate the engine oil pressure status, the neutral position of the transmission gear, and the upward lighting status of the headlight. A central warning device that intensively displays various vehicle statuses, and night illumination lamps for each of the above-mentioned instruments are installed. Power is supplied from the vehicle's battery via an electric cable.

At this time, when using a lamp socket device known from, for example, Japanese Utility Model Publication No. 53-17667, a packing member such as rubber is fitted into the lamp housing, and then the socket and socket holder are fitted and fixed to the packing member. Because of this, it can be used as a lamp socket device with excellent vibration resistance and water resistance.However, since each electrical cord is branched from the power supply side of the vehicle and connected to each instrument, central warning device, and lighting lamp, the instrument The wiring becomes complicated, and there is a problem that the work efficiency decreases when wiring is routed and connected from various electrical components to the above-mentioned battery side via a wire harness.

[Problem that the invention attempts to solve]

In order to avoid this, it is conceivable to change the electrical cord that connects the above-mentioned electrical components of the instruments and the wire harness to a flexible printed wiring board. However, when electrically connecting a lighting lamp or an indicator lamp of a central warning device to the above-mentioned flexible printed wiring board, hard synthetic resin is generally used, as disclosed in, for example, Japanese Utility Model Publication No. 18366/1983. However, problems remain in terms of dustproofing and waterproofing, and the terminals of wedge-based lamps, which are exposed to the external atmosphere such as on motorcycles, and flexible printed wiring boards, are used. There is a problem in that rainwater or dust enters between the contact points with the conductive part, causing fatal effects such as electrolytic corrosion or poor conduction.

Taking this into consideration, it is possible to mold the lamp socket from a flexible material such as rubber to improve airtightness, but if the lamp socket is soft, the conductive terminals may not be assembled in the correct position. In some cases, it may be difficult to determine whether the conductive terminals are connected to the socket or not, especially if the lower ends of the pair of conductive terminals are pushed too close to each other from the outside of the socket body. There are cases where the lamp cannot be assembled because it hits the lower end side, and it may be necessary to adjust the mounting position of the conductive terminal again and then insert the wedge base type lamp and assemble it.

[Means to solve the problem]

The purpose of this invention is to solve the above problem.In addition to forming a mounting hole in the housing for attaching a wedge-based lamp socket, a flexible printed wiring board is arranged along the housing, and a flexible printed wiring board is installed on the above-mentioned mounting hole. A conductive tongue piece drawn and formed from a flexible printed wiring board is formed by protruding from the lamp socket, and a pair of conductive terminals are contained in the hollow portion of the lamp socket, and the conductive terminals have a clamping member that electrically connects to the thin lead wire of the wedge base type lamp. forming a contact piece that contacts the conductive tongue piece of the flexible printed wiring board, and inserting the lamp socket into the mounting hole to attach the lamp socket to the housing;
In a lamp socket device in which a conductive tongue is bent into a mounting hole and a contact piece of the lamp socket is pressed against the conductive tongue to establish electrical continuity, the lamp socket body is formed of a flexible material, and
A flange that comes into contact with the housing side is integrally formed on the outer periphery of the lamp socket body,
In addition, a pair of recesses are formed at the bottom of the cavity of the lamp socket, and a pair of windows are formed by cutting out a part of the lamp socket body approximately in the middle of the cavity, and the conductive terminal has a pair of windows on both sides of the base. At the same time, a protruding piece is formed at the lower end of the base of the conductive terminal to be inserted into the recess provided in the lamp socket, and a protruding piece is formed at the lower end of the base of the conductive terminal to be inserted into the cavity of the lamp socket from the base of the conductive terminal. The lamp socket device is characterized in that a contact piece is formed which extends along the inner wall and is bent outward from the window provided in the lamp socket to make contact with the conductive tongue piece of the flexible printed wiring board.

〔Example〕

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

FIGS. 1 to 3 show an embodiment of this invention. Although not shown in the housing 1 of the motorcycle's instruments, there are a speedometer, engine tachometer, fuel gauge, etc.
It houses instruments such as a thermometer that indicate the driving status of the vehicle. Although not shown, a central warning device is incorporated that centrally displays various vehicle conditions, such as engine oil pressure detection, transmission gear neutral position display, and upward lighting of the headlights.

Further, on the back side of the instrument housing 1, a flexible printed wiring board 2 for instrument wiring is attached along the housing 1, and although not shown, this wiring board 2 has conductive parts that are electrically connected to connection terminals of instruments. A conductive part 4 is formed to electrically connect to the wedge base type lamp socket 3 side formed of a flexible material such as rubber used for instrument lighting or alarm display lighting, and a conductive circuit pattern 5 is drawn from each conductive part 4. This conductive circuit pattern 5 is connected to an electric cable routed from a battery (not shown) via a coupler or the like.

In addition, mounting holes 6 are formed in the housing 1 at appropriate locations for mounting and fixing the wedge base type lamp socket 3 used for instrument lighting and warning display lighting, and conductive circuit patterns 5 are routed over each of the mounting holes 6. A pair of tongue pieces 7 of the formed conductive portion 4 are formed to protrude.

The wedge base type lamp 8 attached to the lamp socket 3 has a filament 1 in the spherical part 9.
0 and a pair of lead thin wires 1 to connect them.
A part of 1 is led out to the outside. Further, the lower end of the lamp 8 is formed as a sealing part 13 that flatly seals the lower part of the spherical part 9 together with the exhaust pipe 12, and the pair of lead wires 11 led out to the outside are connected to this flat sealing part 13. It is bent upward along the line.

The lamp socket 3 is made of a flexible material such as rubber, and has a first cavity 14 into which the sealing part 13 and a part of the spherical part 9 of the wedge base lamp 8 are inserted. A flange 15 is integrally formed on the outer periphery of the main body of the lamp socket 3 so as to come into close contact with the housing 1 side.

In addition, a pair of conductive terminals 16 are inserted into the cavity 14 of the lamp socket body 3 at a distance from each other, and each conductive terminal 16 has clamping pieces 17 cut and raised from both sides of its base at a substantially right angle. This clamping piece 17 is electrically connected to the thin lead wire 11 led out from the wedge base type lamp 8. Further, a contact piece 18 is formed on the conductive terminal 16, extending from its base along the inner wall of the cavity 14 of the lamp socket body 3, and having a tip bent outward. The tongue piece 7 of the flexible printed wiring board 2 and the contact piece 18 are arranged to protrude outward from a window part 19 formed by cutting out a part of the lamp socket body 3 located approximately in the middle of the hollow part 14 of the lamp socket body 3.
It is designed to be electrically connected to the tip of the.

Further, the conductive terminal 16 is formed with a partially protruding protrusion 20 at the lower end of its base.
0 is inserted into and held in a recess 21 provided at the bottom of the cavity 14 of the lamp socket body 3.

Therefore, in the present invention, when the conductive terminal 16 is inserted into the lamp socket body 3 and installed, a recess 21 is provided at the bottom of the cavity 14, and the recess 21 is inserted into the lamp socket body 3.
Projection piece 2 formed at the lower end of the conductive terminal 16 according to the
0, the conductive terminal 1
It is possible to easily determine whether the insertion position of 6 is out of order, thereby eliminating variations in the assembly position and stably attaching it to a determined position.

Furthermore, by attaching and holding the protruding piece 20 of the conductive terminal 16 in the recess 21 at the bottom of the cavity 14, there is no fear that the protruding piece 20 of the conductive terminal 16 will slip out of the recess 21 even if pressed with a fingertip from the outside of the lamp socket body 3. Therefore, it is possible to prevent the terminals 16 from coming into contact with each other, and it is possible to satisfy the electrical connection and mechanical assembly strength of each component.

In addition, when inserting the lamp socket main body 3 with the wedge base type lamp 8 assembled along the mounting hole 6 formed in the housing 1, the conductive tongue piece on the flexible printed wiring board 2 side arranged above the mounting hole 6 of the housing 1 is inserted. 7 is bent along the inner surface of the mounting hole 6, and then the contact piece 18 formed on the conductive terminal 16 is pressed into contact with the conductive tongue piece 7, whereby the lamp socket main body 3 can be assembled to the housing 1, and at the same time the lamp socket body 3 can be assembled to the housing 1. The conductive terminal 16 side held in contact with the thin lead wire 11 of No. 8 and the conductive circuit pattern 5 of the flexible printed wiring board 2
It is possible to maintain electrical continuity between the two.

Also, at this time, the flange 15 of the flexible lamp socket main body 3 comes into close contact with the surface of the flexible printed wiring board 2 and the flat surface of the housing 1, and due to this tightly contacted flange 15, the outside of the housing 1 and the inside of the housing 1 are connected. This makes it possible to maintain a watertight seal between the housing 1 and the housing 1.
The conductive terminal 16 of the lamp socket body 3 can be prevented from entering from the outside of rainwater or dust.
It is possible to maintain a good electrical conduction state between the contact piece 18 formed on the wafer and the conductive tongue piece 7 of the flexible printed wiring board 2.

Furthermore, even in a vibrating atmosphere, by forming the lamp socket body 3 itself, which is attached to the housing 1, from a flexible material, vibrations applied to the lamp socket body 3 can be absorbed, and the inside of the spherical portion 9 of the lamp 8 can be absorbed. It is possible to prevent a breakage accident of the filament 10 formed in the above manner.

[Effect of idea]

As detailed above, the present invention takes advantage of the simple electrical wiring method using a flexible printed wiring board and the excellent features of the socket body made of flexible material, such as vibration resistance and airtightness. At the same time, it is possible to provide a lamp socket device in which a conductive terminal can be inserted into the cavity of the socket body.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of this invention seen from the back side of the instrument housing, Fig. 2 is a cross-sectional view showing how the lamp socket is attached to the flexible printed wiring board, which is the main part, and Fig. 3 The figure is an exploded perspective view showing a part of the lamp socket in cross section. DESCRIPTION OF SYMBOLS 1... Housing, 2... Flexible printed wiring board, 3... Lamp socket, 4... Conductive part, 5... Conductive circuit pattern, 6... Mounting hole, 7
... tongue piece, 8 ... wedge base type lamp, 9 ...
...Spherical part, 10...Filament, 11...Thin lead wire, 12...Exhaust pipe, 13...Sealing part,
14... Cavity part, 15... Flange, 16... Conductive terminal, 17... Clamping piece, 18... Contact piece, 19
...Window part, 20...Protrusion piece, 21...Recessed part.

Claims (1)

[Scope of utility model registration request] A mounting hole for attaching a wedge-based lamp socket is formed in the housing, a flexible printed wiring board is arranged along the housing, and a conductive tongue piece drawn and formed from the flexible printed wiring board is protruded over the mounting hole. A pair of conductive terminals are contained in the cavity of the lamp socket, and the conductive terminals are formed with a clamping piece that electrically connects to the thin lead wire of the wedge base type lamp, and a conductive tongue piece of the flexible printed wiring board is formed on the conductive terminal. form a contact piece that comes into contact with the lamp socket, insert the lamp socket into the mounting hole, attach the lamp socket to the housing, bend the conductive tongue piece into the mounting hole, and press the contact piece of the lamp socket against the conductive tongue piece to establish electrical continuity. In the lamp socket device, the lamp socket main body is formed of a flexible material, a flange is integrally formed on the outer circumference of the lamp socket body to abut against the housing side, and a pair of recesses are formed at the bottom of the cavity of the lamp socket. A pair of windows are formed by cutting out a part of the lamp socket approximately in the middle of the hollow portion, and the holding pieces are formed on the conductive terminal by cutting and raising the conductive terminal at approximately right angles from both sides of the base thereof, and A protruding piece is formed at the lower end of the base of the conductive terminal to be inserted into a recess provided at the bottom of the cavity of the lamp socket, and the window extends from the base of the conductive terminal along the inner wall of the cavity of the lamp socket. 1. A lamp socket device characterized in that a contact piece is formed by being bent outward from a portion of the flexible printed wiring board to make contact with a conductive tongue piece of the flexible printed wiring board.