JPS6230294Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is particularly applicable to lighting of motorcycle instruments or warning lighting 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.

[Prior art]

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 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. This makes it possible to obtain a lamp socket device with excellent vibration resistance and water resistance. In addition to the above-mentioned conventional device, there is also a lamp socket device in which the lamp socket is made of a flexible material, as disclosed in Japanese Utility Model Application Publication No. 56-54591, which was previously proposed by the applicant of the present invention. However, in each of the above-mentioned conventional devices, the electric cord is drawn out from the bottom of the lamp socket and routed for wiring, so each electric cord is branched from the power supply side and connected to each meter, central warning device, and lighting. The larger the number of lamps, etc., the more complicated the instrument wiring process becomes, and the work efficiency tends to drop when wiring from various electrical components to the above-mentioned battery side via a wiring harness. The surface remains.

[Problem that the invention attempts to solve]

In order to simplify the wiring process using electrical cords, flexible printed wiring boards are used instead of electrical cords for instruments such as automobiles. At this time, when electrically connecting a lighting lamp or an indicator lamp of a central warning device to the above-mentioned flexible printed wiring board, it is generally
As disclosed in Publication No. 48-18366, a wedge base type lamp socket molded from hard synthetic resin is used in consideration of mounting strength.
There is no problem with instruments such as automobiles because they are not installed directly in the external atmosphere, but motorcycles, etc.
When used directly exposed to the external atmosphere, such as in a small ship or agricultural machine, rainwater and dust may enter between the conductive terminals of the wedge-based lamp and the conductive part of the flexible printed wiring board.
There is a problem in that it can cause 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. However, if the lamp socket is soft, the pair of conductive terminals contained within the lamp socket may become loose. In this situation, if you try to insert the wedge base lamp into the lamp socket, the sealing part of the wedge base lamp will hit the conductive terminals and you may not be able to insert it. This may require the wedge base lamp to be re-inserted and reassembled after adjusting the location of the conductive terminal in the lamp socket.

[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 formed by being drawn and formed from a flexible printed wiring board is disposed to protrude, and a pair of conductive terminals are contained within the cavity of the lamp socket, and the conductive terminals are electrically connected to the thin lead wires of the wedge base type lamp. A clamping piece is formed, and a contact piece is formed to electrically connect with the conductive tongue piece, the lamp socket is inserted into the mounting hole to mount the lamp socket on the housing, and the conductive tongue piece is bent into the mounting hole to attach the lamp socket. In the lamp socket device, the lamp socket body is formed of a flexible material, and a flange portion that comes into contact with the housing side is integrally protruded from the outer periphery of the lamp socket body. At the same time, a pair of windows are cut out in a part of the outer periphery of the lamp socket body, and a pair of recesses are formed at the bottom of the cavity of the lamp socket body. A protruding wall portion for regulating the position of the clamping piece is integrally formed on the inner wall surface of the lamp socket main body formed by the cavity connecting the respective recesses from the bottom side of the cavity to the open side of the cavity, and The holding piece is cut and raised at a substantially right angle from both sides of its base, and extends from the base of the conductive terminal along the inner wall of the cavity of the lamp socket body, and extends outward from the window provided in the lamp socket body. The contact piece is bent to form the contact piece that comes into contact with the conductive tongue piece of the flexible printed wiring board, and the protrusion is positioned and inserted into the recess provided at the bottom of the cavity at the lower end of the base of the conductive terminal. A lamp socket device characterized in that the lamp socket device is formed with a single piece.

〔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 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 a conductive conductor that is electrically connected to the connection terminals of the instruments. A conductive part 4 is formed which is electrically connected to the wedge-based lamp socket 3 made 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 cavity 14 into which the sealing part 13 and part of the spherical part 9 of the wedge base lamp 8 are inserted. A flange 15 is provided on the outer periphery of the main body to make close contact with the housing 1 side.
are integrally formed to protrude.

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. A window portion 19 formed by cutting out a part of the lamp socket body 3 located approximately in the middle of the hollow portion 14 of No. 3.
The tongue piece 7 of the flexible printed wiring board 2 and the tip of the contact piece 18 are electrically connected to each other.

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

Further, the clamping piece 17 is positioned on the inner wall surface of the lamp socket body 3 by the cavity 14 connecting the recesses 21 provided at the bottom of the cavity 14 of the lamp socket body 3, from the bottom side of the cavity 14 to the open side of the cavity 14. A protruding wall portion 22 is integrally formed to protrude.

Therefore, in the present invention, when inserting and mounting the conductive terminal 16 into the lamp socket body 3, a recess 21 is provided at the bottom of the cavity 14, and a protruding wall 22 is formed protruding from the inner wall surface of the cavity 14. This makes it possible to feed the conductive terminal 16 along the side wall surface of the protruding wall portion 22 as a guide, eliminating variations in the assembly position.
It can be stably mounted in a fixed position.

Furthermore, by attaching and holding the projecting piece 20 of the conductive terminal 16 in the recess 21 at the bottom of the cavity 14, the projecting piece 20 formed at the lower end of the terminal 16 will not move into the recess 21 even if pressed with a fingertip from outside the lamp socket main body 3.
There is no fear that the conductive terminals 16 will come out from inside, and at least a part of the clamping piece 17 located on the upper end side of the conductive terminals 16 is held in contact with the side wall surface of the protruding wall portion 22, thereby preventing the conductive terminals 16 from coming into contact with each other. The electrical connection and mechanical assembly strength of each component can be satisfied.

In addition, after inserting the wedge base type lamp 8 into the lamp socket body 3 and holding the thin lead wire 11 of the lamp 8 in contact with the conductive terminal 16, the lamp socket body 3 is inserted along the mounting hole 6 formed in the housing 1, and at the same time, Mounting hole 6 of housing 1
The conductive tongue piece 7 on the flexible printed wiring board 2 side disposed above is bent along the inner surface of the mounting hole 6, and then the contact piece 17 formed on the conductive terminal 16 is pressed into contact with the conductive tongue piece 7. This allows the lamp socket main body 3 to be assembled to the housing 1, and at the same time maintains electrical continuity between the conductive terminal 16 side held in contact with the thin lead wire 11 of the lamp 8 and the conductive circuit pattern 5 of the flexible printed wiring board 2. be able to.

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.
conductive terminals 16 of the lamp socket body 3.
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, the conductive terminal can be stably inserted into the cavity of the socket body, and this makes it possible to insert the wedge-based lamp into the socket body, ensuring electrical connections and mechanical connections between each component. Therefore, it is possible to provide a lamp socket device that can satisfy the required assembly strength.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an embodiment of this invention seen from the back side of the instrument housing, and Figure 2 is a perspective view of the instrument housing showing one embodiment of this invention.
FIG. 3 is an exploded perspective view showing a part of the lamp socket in cross section. Housing...1, Flexible printed wiring board...2, Lamp socket...3, Conductive part...
4, Conductive circuit pattern...5, Mounting hole...6, Tongue piece...7, Wedge base lamp...8, Spherical part...9, Filament...10, Thin lead wire...11, Exhaust pipe...12 , Sealing part...13,
Hollow part...14, Flange...15, Conductive terminal...
...16, clamping piece...17, contact piece...18, window section...19, projecting piece...20, recess section...21, protruding wall section...22.

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 formed by being routed from the flexible printed wiring board is protruded over the mounting hole. A pair of conductive terminals are included in the cavity of the lamp socket, and the conductive terminals are formed with a clamping piece that is electrically connected to the thin lead wire of the wedge base type lamp, and is electrically connected to the conductive tongue piece. forming a contact piece for connection, inserting the lamp socket into the mounting hole to mount the lamp socket on the housing, folding the conductive tongue piece into the mounting hole and pressing the contact piece of the lamp socket onto the conductive tongue piece to establish electrical continuity. In the lamp socket device, the lamp socket body is formed of a flexible material, and a flange portion that comes into contact with the housing side is integrally formed on the outer periphery of the lamp socket body, and is located approximately in the middle of the cavity of the lamp socket body. , a pair of windows are cut out in a part of the outer periphery of the lamp socket body, a pair of recesses are formed in the bottom of the cavity of the lamp socket body, and the cavity connecting the recesses forms an inner wall surface of the lamp socket body. A protruding wall portion for regulating the position of the clamping piece is formed integrally protruding from the bottom side of the cavity along the open side of the cavity, and the clamping piece is cut and raised at a substantially right angle from both sides of the base of the conductive terminal. The conductive tongue extends from the base of the conductive terminal along the inner wall of the cavity of the lamp socket body, is bent outward from the window provided in the lamp socket body, and comes into contact with the conductive tongue of the flexible printed wiring board. A lamp socket device characterized in that the contact piece is formed as described above, and a protruding piece is formed at the lower end of the base of the conductive terminal to be inserted in a recess provided in the hollow portion in a position-controlled manner.