JPS642472Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is particularly useful for illumination of indicating instruments for motorcycles etc. exposed to external ambient air and used in vibration atmospheres, or for warning of vehicle equipment. The present invention relates to an improved structure of a lamp lighting device for displaying, etc.

[Conventional technology]

Generally, this type of lamp illumination device will be explained using an indicator instrument such as a motorcycle as an example. Instruments on motorcycles, etc., include speedometers with speed alarms, engine tachometers, fuel gauges, temperature gauges, and other instruments that indicate the driving status of the vehicle, as well as indicators that indicate the oil pressure status of the engine oil and the neutral position of the transmission gear. A central warning device that centrally displays various vehicle conditions such as the upward lighting status of the headlights, and night illumination lamps for each of the above-mentioned instruments are installed. Electric power is supplied to lamps, etc. from the vehicle's battery via electric cables, and each electric cord branches out to each meter and instrument.
Since it is connected to the central warning device and lighting lamp, the wiring of the instrument tends to be complicated, and there is a disadvantage that the workability of routing and connecting the wires from various electrical components to the above-mentioned battery side via the wire harness is poor. .

In order to avoid this, it is conceivable to change the electrical cord that connects the electrical components of the instruments and the wire harness described above to a flexible printed wiring board.

[Problem that the invention attempts to solve]

However, when electrically connecting a lighting lamp or an indicator lamp of a central warning device to the above-mentioned flexible printed wiring board, a wedge-based lamp socket is generally used.
In this case, the flexible printed wiring board is routed along the outer surface of the housing of the meter, and conductive parts are provided at appropriate locations on the flexible printed wiring board routed on the outer surface of the housing. Because it maintains continuity with the contact part of the terminal provided on the
Particularly in the case of motorcycles, ships, agricultural machinery, etc. that are exposed to the external atmosphere, dust and rainwater are easily transmitted, which can have fatal effects such as poor conduction between conductive parts and contact parts. There is.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned conventional problems and to provide a lamp socket mounting device that can simplify electrical wiring and improve electrical continuity.

[Means for solving problems]

In order to achieve the above object, the present invention forms a substantially circular mounting hole for inserting a wedge-based lamp socket into the housing, and
A notch is formed in a part of this mounting hole, a flexible printed wiring board is arranged along the outer wall surface of the housing, and a pair of conductive tongues formed by being routed from the flexible printed wiring board are placed on the mounting hole. A pair of terminals are formed in a protruding manner and electrically connected to the thin lead wire of the wedge base lamp, and a pair of terminals are included in the cylindrical portion of the lamp socket, and a contact piece is formed on each terminal to be electrically connected to the conductive tongue piece. death,
A flange is formed on the outer periphery of the lamp socket body, and a locking protrusion that can be inserted into the notch of the mounting hole is formed on the outer surface of the cylindrical portion of the lamp socket, and the locking protrusion of the lamp socket is inserted into the notch of the mounting hole. In the lamp socket device in which the lamp socket is attached to the housing by bayonet connection, and the tongue piece is bent along the inner wall surface of the mounting hole to maintain contact and continuity between the contact piece of the lamp socket and the conductive tongue piece part, the above-mentioned flexible print The conductive tongue drawn from the wiring board has a narrow proximal end and a wide distal end, protruding into an approximately L-shape. The narrow part on the proximal end is bent and arranged, and the wide part on the distal end of the tongue piece is routed and arranged on the inner wall surface of the mounting hole formed in the housing. This simplifies the wiring, facilitates the assembly of the wiring board and the lamp socket device, and improves the electrical conductivity between the conductive portion of the wiring board and the lamp socket device.

〔Example〕

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

1 to 6, an instrument housing 1 of a motorcycle houses instruments (not shown) that indicate the driving status of the vehicle, such as a speedometer, an engine tachometer, a fuel gauge, and a temperature gauge. Although not shown, a central warning device is incorporated that centrally displays various vehicle conditions such as detecting the oil pressure of the engine oil, displaying the neutral position of the transmission gear, and lighting up 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 outer wall surface of the housing 1.
The flexible printed wiring board 2 includes a conductive part 3 that is electrically connected to the connection terminal of instruments, and a conductive part 5 that is electrically connected to a wedge-based lamp socket 4 used as instrument lighting or display lighting. A conductive path 6 is formed to be continuous with each of the conductive parts 3 and 5, and a coupler is used to connect the conductive path 6 side to the electric cable wired from a battery (not shown). The wires are connected.

The flexible printed wiring board 2 basically has almost the same structure as the conventional one, with the conductive parts 3 and 5 that make electrical contact with the outside partially exposed on the surface of the wiring board 2, and the other parts The conductive path 6 portion is covered with a flexible insulating sheet.

Further, the housing 1 is formed with a mounting hole 7 at a suitable location for mounting and fixing the wedge-based lamp socket 4 used for instrument lighting and display lighting, and a notch 8 is formed at a suitable position around the periphery in continuity with the mounting hole 7. It is formed.

Further, a pair of tongue pieces 9 of the conductive portion 5 formed by routing the conductive path 6 of the flexible printed wiring board 2 are formed to protrude above the mounting hole 7 of the instrument housing 1, and this tongue piece 9 has its base end 9A. It is protruded into a substantially L-shape so that the side is narrow and the tip 9B side is wide.

Further, the lamp socket 4 is formed with a cylindrical portion 11 into which a part of the wedge base lamp 10 can be inserted, and a pair of terminals 1 that are electrically connected to the thin cord wire 10A of the wedge base lamp 10.
2 is contained in the cylindrical portion 11, and the contact piece 1 is electrically connected to the conductive tongue piece 9 portion of the flexible printed wiring board 2 to the pair of terminals 12.
3 is formed.

In addition, on the outer periphery of the main body of the lamp socket 4,
A flange 14 is formed to protrude from the side of the housing 1, and a flange 14 is formed on the circumferential surface of the cylindrical portion 11 of the lamp socket 4 so that the lamp socket 4 can be inserted and guided along a notch 8 provided at an appropriate position around the mounting hole 7. A stop projection 15 is formed to protrude.

Further, in this embodiment, below the flange 14,
That is, an annular packing 16 made of rubber or the like is disposed between the flange 14 and the locking projection 15.

Therefore, in the present invention, the wedge base lamp 10 is inserted into the lamp socket 4, and the lamp 10
After assembling the thin lead wire 10A in contact with the terminal 12, the locking protrusion 1 of the lamp socket 4 is attached.
Notch 8 of mounting hole 7 formed in housing 1
At the same time, the narrow base end 9A side of the conductive tongue piece 9 provided on the flexible printed wiring board 2, which is routed and wired over the mounting hole 7 of the housing 1, is inserted along the inner wall surface of the mounting hole 7. It can be bent and bent.

Next, by rotating the lamp socket 4 in one direction, the locking protrusion 15 is held in contact with the inner surface of the housing 1, and the lamp socket 4 is held in contact with the inner surface of the housing 1.
The contact piece 13 formed on the terminal 12 is connected to the tongue piece 9.
The conductive tip 9B side, which is the wide part of
The side of the terminal 12 held in contact with the thin lead wire 10A of No. 0 can be electrically connected to the side of the conductive path 6 of the flexible printed wiring board 2.

At this time, the inner wall surface of the mounting hole 7 of the housing 1 is
Although it is formed in an almost circular arc shape, when the tongue piece 9 portion of the flexible printed wiring board 2 is bent along the mounting hole 7, the bent portion of the tongue piece 9 is bent at the base end 9A, which is formed to have a narrow width. , it becomes possible to bend the bent state of the base end 9A almost linearly, and it is possible to suppress application of unreasonable stress to the tongue piece 9 portion of the flexible printed wiring board 2 as much as possible. Damage to the parts and disconnection of the conductive parts can be prevented.

In addition, the tip 9B of the tongue piece 9 once folded back can be pulled almost along the inner wall surface of the mounting hole 7 of the housing 1, and the terminal 1 of the lamp socket 4 can be
Good conduction with the contact piece 13 formed on the contact piece 2 can be maintained.

Furthermore, by extending the tongue piece 9 of the flexible printed wiring board 2 from the outer peripheral surface of the housing 1 to the inner wall surface of the mounting hole 7, it is possible to prevent dust, water droplets, etc. from adhering to the tongue piece 9 side from the outside. It can be prevented.

[Effect of idea]

This idea involves guiding the tongue piece of a flexible printed circuit board through the mounting hole of the housing, and making contact between the tongue piece and the contact piece provided on the terminal of the wedge-based lamp socket at the inner wall surface of the mounting hole. This prevents dust, water droplets, etc. from entering from the outside and adhering to one side of the tongue, and when folding the tongue from the outer wall of the housing to the inner wall of the mounting hole, By forming the end side narrowly, it is possible to suppress application of unreasonable stress to the tongue portion as much as possible, and there is an advantage that the protection of the tongue portion can be enhanced.

[Brief explanation of the drawing]

Fig. 1 is a rear view of an instrument housing showing an embodiment of this invention, Fig. 2 is a sectional view showing how a wedge base type lamp socket is attached to a flexible printed wiring board, which is the main part of Fig. 1; 3
4 is a plan view of FIG. 3, FIG. 5 is a plan view of an embodiment of the wedge base type lamp socket, and FIG. The figure is a sectional view of FIG. 5. Housing...1, Flexible printed wiring board...2, Conductive part...3, 5, Wedge base lamp socket...4, Conductive path...6, Mounting hole...7, Notch...8, Tongue... ...9, proximal end...9
A, Tip...9B, Wedge base lamp...1
0, Thin lead wire...10A, Cylindrical part...11, Terminal...12, Contact piece...13, Flange...1
4, Locking protrusion...15, Annular packing...1
6.

Claims (1)

[Scope of utility model registration request] A substantially circular mounting hole is formed in the housing for inserting a wedge base type lamp socket, and a notch is formed in a part of this mounting hole, and a flexible printed wiring board is arranged along the outer wall surface of the housing. A pair of conductive tongues drawn from a flexible printed wiring board are protruded over the mounting hole, and a pair of terminals electrically connected to the thin lead wire of the wedge base lamp are provided within the cylindrical portion of the lamp socket. A contact piece electrically connected to the conductive tongue is formed on each terminal, a flange is formed on the outer periphery of the lamp socket body, and the contact piece is inserted into the cutout of the mounting hole on the outer surface of the cylindrical part of the lamp socket. form a possible locking protrusion, bayonetly connect the locking protrusion of the lamp socket to the notch of the mounting hole, attach the lamp socket to the housing, and bend the tongue piece along the inner wall surface of the mounting hole to make contact with the lamp socket. In a lamp socket device in which a conductive tongue piece and a conductive tongue piece are kept in contact with each other, the conductive tongue piece drawn from the flexible printed wiring board has a narrow base end and a narrow width on its distal end side. is made wide and protrudes into a substantially L-shape, the narrow part on the base end side of the tongue piece formed in the substantially L-shape is bent and arranged, and the wide part on the tip side of the tongue piece is formed into a housing. A lamp socket mounting device characterized in that the lamp socket mounting device is arranged so as to be routed around the inner wall surface of a mounting hole.