JP2601874Y2 - Lamp socket mounting device for flexible printed wiring boards - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a lamp socket mounting device for a flexible wiring board used for an instrument for a vehicle and the like, particularly for lighting a meter for a motorcycle exposed in an external atmosphere and used in a vibrating atmosphere, or The present invention relates to a device for mounting a lamp socket on a flexible wiring board used to maintain a good seal between a housing side and a lamp socket side of a lamp device for displaying a warning of a vehicle instrument.

[0002]

2. Description of the Related Art In general, instruments for vehicles such as motorcycles include speedometers and engine tachometers provided with a speed alarm device.
Instruments that indicate the driving situation of the vehicle, such as fuel gauges and thermometers,
Alternatively, a centralized warning device for intensively displaying various states such as a display of the oil pressure state of the engine oil, a neutral position of the transmission gear, and an upwardly lit state of a headlight, and a lamp for illuminating or displaying each of the above instruments are attached. A flexible printed wiring board is used as an electric cord for connecting electrical components of these instruments and a wire harness for supplying power from the battery to the electrical components.

[0003]

However, when electrically connecting the lamp and the flexible printed circuit board, a wedge-based lamp socket device is generally used, but the airtightness between the housing and the lamp socket is generally used. When exposed to an external atmosphere such as a motorcycle and exposed to a vibrating atmosphere, rainwater or water may flow between the terminal part of the wedge-based lamp socket and the conductive part of the flexible printed wiring board. There is a problem in that dust or the like invades and causes problems such as electrolytic corrosion of the conductive portion or poor conduction.

In order to solve these problems, there is a lamp socket mounting apparatus for a flexible printed wiring board disclosed in, for example, Japanese Utility Model Laid-Open No. 58-68055 . This forms a mounting hole for mounting a wedge-based lamp socket in the housing, forms a cutout in a part of the mounting hole, disposes a flexible printed wiring board along the housing, and mounts the housing. A pair of conductive portions formed around the hole from the flexible printed wiring board are formed around the hole, and a pair of terminals electrically connected to a lead wire of a wedge base lamp are included in the cylindrical portion of the lamp socket. Forming a contact piece in electrical contact with the conductive portion on the pair of terminals,
A flange is formed on the outer peripheral portion of the lamp socket body, and a locking projection is formed on the outer surface of the tubular portion of the lamp socket. An airtight member made of a flexible material that seals the part is arranged,
The latching projection of the lamp socket is inserted along the notch of the mounting hole, and is rotated in one direction to keep the contact piece of the lamp socket and the conductive portion in contact with each other, and that the flange and the housing side The airtight member is compressed and held in between to seal the conductive portion and the contact piece.

[0005] Therefore, airtightness is provided between the housing side and the lamp socket side, so that intrusion of rainwater and dust from the outside can be prevented.

However, in this case, in the pair of conductive portions provided on the flexible wiring board, the conductive portion and the conductive portion are formed around the mounting hole, and the conductive portion and the conductive portion are cutout portions of the mounting hole. Closest. Further, an insulator is attached to the surface of the flexible printed wiring board in order to prevent a short circuit between the conductive circuit patterns. Here, when the conductive portion and the conductive circuit pattern are formed on the base film of the flexible wiring board, the difference between the portion where the conductive portion and the conductive circuit pattern exist on the base film and the portion where the conductive portion does not exist is slightly, but slightly different. Will occur. Therefore, a slight gap is formed between the instrument housing side and the lamp socket side, and rainwater, dust and the like may enter from the gap, and the contact piece and the conductive portion may be eroded.

[0007]

SUMMARY OF THE INVENTION In order to solve the conventional problems, the present invention forms a mounting hole for mounting a lamp socket in an instrument housing, and provides a pair of notches in the mounting hole. off along the instrument housing
A flexible printed wiring board is provided, and a pair of conductive portions formed by drawing from the flexible printed wiring board facing the mounting hole is formed, and electrically connected to a lead wire of a wedge base lamp in the lamp socket. A pair of contact pieces are included, a locking projection is formed on a pair of arc-shaped cylinder portions of the lamp socket, a flange is formed outside the arc-shaped cylinder portion, and an annular packing is provided, and the mounting hole is provided. Insert the locking projection along the notch in the inside, rotate in one direction, attach the lamp socket to the instrument housing, and press-contact the contact piece to the conductive part in the mounting hole to conduct. In the lamp socket mounting device, the distance between one end and the other end of the pair of conductive portions is formed to be smaller than the width of the notch of the mounting hole. Than it is. In addition, the flexiv
The outer peripheral portion of the conductive portion of the Le printed wiring board is covered with an insulator.

[0008]

SUMMARY OF] By the above configuration, the lamp socket of the contact piece and off
It is possible to maintain a good conduction state with the conductive portion of the flexible printed wiring board and prevent rainwater and dust from entering from the outside of the housing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. 1 is a perspective view of the present invention, FIG. 2 is a cross-sectional view of the lamp socket of the present invention, FIG. 3 is a cross-sectional view of the flexible printed wiring board, and FIG. 4 is a plan view of the flexible printed wiring board.

Although not shown, instruments such as a speedometer, an engine tachometer, a fuel gauge, a thermometer and the like for indicating a driving condition of the vehicle are housed in an instrument housing 1 for a motorcycle or the like. indication of the neutral position, and centralized warning device the <br/> states of various vehicles such as an upward lighting headlight centrally display is incorporated.

A flexible printed wiring board 2 is provided on the rear side of the instrument housing 1 along the instrument housing 1, and is electrically connected to a wedge base lamp socket 3 for lighting and display. And a conductive circuit pattern 5 connected via a wire harness wired from a battery (not shown).

A mounting hole 6 for mounting and fixing the wedge base lamp socket 3 is formed in an appropriate place in the instrument housing 1, and a notch 7 is formed in a peripheral portion continuous with the mounting hole 6. A pair of conductive portions 4 of the flexible printed wiring board 2 corresponding to the periphery are formed.

In the pair of conductive portions 4, the one conductive portion 4 and the other conductive portion 4 which face each other around the mounting hole 6.
The end 4 of the other conductive part 4 that is paired with the end 4a of the conductive part 4
The gap with the gap b is narrower than the width of the notch 7, and in the present embodiment, the gap is opposed to the conductive section 4 so as not to be short-circuited.

Further, an insulator 8 for preventing a short circuit of the conductive circuit pattern 5 is attached to a part of the outer peripheral portion of the conductive portion 4.

A pair of arc-shaped cylindrical portions 10 into which the wedge base lamps 9 are inserted are formed in the lamp socket 3 so as to protrude upward with a gap therebetween, and a flange is formed outside the arc-shaped cylindrical portion 10 of the lamp socket 3. An annular packing 12 made of a flexible material such as rubber and having a circular cross-section is mounted on the flange 11 portion, and a mounting hole 6 is formed on a peripheral surface 10a of the arc-shaped cylindrical portion 10. A locking projection 13 that engages with the cutout 7 provided is provided.

In the lamp socket 3, a holding piece 15 electrically contacting the lead wire 14 of the wedge base lamp 9.
A pair of conductive terminals 16 are accommodated, and the conductive terminals 16 are disposed in a gap between the pair of arc-shaped tubular portions 10. A contact piece 17 that is in contact with and electrically contacts the conductive portion 4 is formed.

Further, a groove formed around the annular packing 12 is formed in a flange 11 formed in the lamp socket 3.
18 are provided.

After inserting the wedge base lamp 9 into the lamp socket 3 and holding the lead wire 14 of the wedge base lamp 9 in contact with the conductive terminal 16, the locking projection 13 of the lamp socket 3 is connected to the instrument housing 1. Then, the lamp socket 3 is rotated in one direction so that the contact pieces 17 of the conductive terminals 16 contact the pair of conductive parts 4 of the flexible printed wiring board 2.
Are brought into contact with each other to be in a conductive state. Even when the lamp socket 3 is mounted on the housing 1 as described above, the annular packing 12 is restricted from being deformed and moved outward by the groove 18. .

When the lamp socket 3 is mounted on the housing 1 by this, the interval between the end 4a and the end 4b of the pair of conductive portions 4 is narrow, and a part of the upper surface thereof is covered by the insulator 8. When the socket 3 is mounted on the housing 1 by removing the step caused by providing the conductive portion 4 on the flexible printed wiring board 2 and pressing the portion covered with the insulator 8 with the packing 12 by pressing. 8 can prevent rainwater from entering between the packing 8 and the contact piece 17 of the lamp socket 3 and the flexible printed wiring board 2.
Of the conductive portion 4 can be maintained in a good condition, and electrolytic corrosion and poor current can be prevented.

The distance between the end 4a and the end 4b of the conductive part 4 is such that the conductive part 4 is not short-circuited, and the insulator 8 covers a part of the conductive part 4 to make the conductive part 4 flexible. Any space can be used as long as the gap can be eliminated by providing the printed wiring board 2.

The packing 12 does not need to have a circular cross-sectional shape, but may have any shape as long as it has waterproof properties.

[0022]

[0023]

[Effect of the invention] According to the present invention, to reduce the distance between one end and the other end of the pair of conductive parts, by contact with Pa Kkin, the sealing property between the housing and the lamp socket In this case, the state of conduction between the contact piece of the lamp socket and the conductive portion of the flexible printed wiring board can be maintained in a good state, and electrolytic corrosion and poor conduction can be prevented. Also,
By covering the outer periphery of the conductive part with an insulator,
To improve the sealing between the lamp socket and the lamp socket.
Between the contact pieces of the flexible printed wiring board and the conductive pieces
It is possible to maintain good electrical conditions and prevent electrolytic corrosion and poor power distribution.
Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a sectional view of the present invention.

FIG. 3 is a step view of a flexible printed wiring board.

FIG. 4 is a plan view of a flexible printed wiring board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Flexible printed wiring board 3 Lamp socket 4 Conductive part 4a End part 4b end part 5 Conductive circuit pattern 6 Mounting hole 7 Notch part 8 Insulator 9 Wedge base lamp 10 Arc-shaped cylindrical part 10a Peripheral surface 11 Flange 12 Packing 13 Stop projection 14 Lead wire 15 Holding piece 16 Conductive terminal 17 Contact piece 18 Groove

Claims (2)

(57) [Scope of request for utility model registration] 1. A mounting hole for mounting a lamp socket in an instrument housing, a pair of cutouts is provided in the mounting hole, and a flexible printed wiring board is provided along the instrument housing. It said to face the mounting hole off
Forming a pair of conductive portions drawn around from the flexible printed wiring board, including a pair of contact pieces electrically connected to a lead wire of a wedge base lamp in the lamp socket, and a pair of arc-shaped tubes of the lamp socket; Forming a locking projection on the portion, forming a flange on the outside of the arc-shaped cylindrical portion and disposing an annular packing, inserting the locking projection along the notch in the mounting hole, In the lamp socket mounting device, which rotates in one direction, mounts the lamp socket on the instrument housing, and presses the contact piece against the conductive portion in the mounting hole so as to be conductive, the pair of conductive portions Ranpusoke at one end and the other of the spacing between the ends, the flexible printed wiring board characterized by being formed by said narrower than the width of the notch portion of the attachment hole Door mounting device. 2. A lamp socket mounting device in a flexible printed wiring board according to claim 1, characterized in that the outer peripheral portion of the conductive portion of the flexible printed wiring board covered with an insulator.