JPH0134855Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is applicable to lamp socket devices used in vehicle instruments, particularly lighting for motorcycle instruments that are exposed to the external atmosphere and used in a vibrating atmosphere. The present invention also relates to an improvement in a device for attaching an airtight member to a lamp socket, which is used to maintain good sealing between the housing side and the lamp socket side of a lamp lighting device for displaying warnings for vehicle equipment.

[Related technologies and their problems]

In general, instruments for vehicles such as motorcycles include instruments that indicate the driving status of the vehicle, such as a speedometer equipped with a speed warning device, an engine tachometer, a fuel gauge, and a temperature gauge, as well as the oil pressure status of the engine oil and the neutral position of the transmission gear. display, a central warning device that centrally displays various conditions such as the upward lighting status of the headlight, and night illumination lamps for each of the above-mentioned instruments. A flexible printed wiring board is used as the electrical cord to connect.

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 device is generally used, but it is said that the airtightness between the housing and the lamp socket is poor. If there is a malfunction and the product is exposed to an external atmosphere such as a motorcycle and is exposed to vibrations, rainwater or dust may enter between the terminals of the wedge-based lamp socket and the conductive parts of the flexible printed wiring board, resulting in electrolysis or electrolysis. This has the problem of causing problems such as poor electrical conduction.

In order to prevent these problems from occurring, a lamp socket mounting device for a flexible printed wiring board has been disclosed, such as Utility Model Application No. 58-68054. A flexible airtight member such as rubber is attached to the side where the contact piece that electrically connects to the conductive part extends, and the lamp socket's locking protrusion is attached along the notch of the mounting hole formed in the housing. Then, by rotating the lamp socket in one direction, the locking protrusion is held on the inner surface of the housing so that the contact piece formed on the terminal of the lamp is pressed into contact with the conductive part of the flexible printed wiring board. However, the lamp socket can be attached to the housing.

Therefore, by rotating the lamp socket in one direction, the locking protrusion presses against the inner surface of the housing, and the airtight member disposed to surround the conductive part of the flexible printed wiring board and the contact piece of the lamp socket closes. The compressed and clamped airtight member is pressed between the flange and the housing side, and the external side of the housing and the internal side of the housing can be kept well sealed.

However, in this case, the locking protrusion rises from the flange base of the lamp socket and is continuous with the wall and is formed toward the top of the arcuate tube, so when the airtight member is installed in the lamp socket, the inner contour of the airtight member The position of the portion is regulated along the lower circumferential surface of the arcuate cylinder, and the airtight member is disposed below the locking protrusion so as to rest on a rising wall portion that is continuously formed from the base of the flange. Since the airtight member is not provided with a position regulating part to prevent the airtight member from moving upward, the assembly position of the airtight member may shift during assembly to the housing, making it difficult to maintain a good airtight state. There was a risk that it would disappear.

Furthermore, since the airtight member is disposed below the locking protrusion along the outside of the rising wall part that is continuously formed from the base of the flange, the diameter of the flange is equal to the diameter of the pair of rising wall parts. This resulted in a reduction in mounting density when mounted on the housing, and restrictions on the design of the overall shape of the instrument housing. Furthermore, the mounting space for the housing is likely to be restricted.

[Purpose of invention]

The object of the present invention is to prevent the airtight member disposed on the flange of the lamp socket from shifting from the lamp socket, and to reduce the diameter of the flange of the lamp socket.

[Summary of the idea]

The present invention relates to a wedge-based lamp socket device used in a vehicle instrument such as a motorcycle that is used in an external atmosphere or a vibration atmosphere. In addition to providing a first position regulating part, the position of the inner part of the airtight member is controlled by the arcuate tube part of the lamp socket, and a second position regulating part is formed by the rising wall below the locking protrusion. In particular, the upward movement of the air-tight member disposed on the flange of the lamp socket is regulated by the second position regulating part, and almost the entire circumference of the inner part of the air-tight member is aligned with the circumferential surface of the arc-shaped cylinder part. The diameter of the flange of the lamp socket is reduced by arranging the lamp socket, thereby preventing the airtight member from falling off the lamp socket during assembly or storage, increasing the density of mounting the lamp socket on the housing, and increasing the density of the lamp socket. It maintains good electrical conductivity between the terminals and the conductive parts of the flexible printed wiring board, prevents rainwater and dust from entering from the outside of the housing, and reduces the space occupied on the instrument housing to prevent other parts from entering. This allows interference to be prevented.

[Example of idea]

Figures 1 to 4 show an embodiment of the present invention, in which a speedometer, an engine tachometer, a fuel gauge, a temperature gauge, etc., which are not shown in the instrument housing 1 of a motorcycle or the like, are installed to monitor the driving status of the vehicle. In addition to housing the instruments that give instructions, it also includes a central warning system that centrally displays various vehicle conditions such as engine oil pressure detection, transmission gear neutral position display, and upward lighting of headlights.

In addition, a flexible printed wiring board 2 is arranged on the back side of the instrument housing 1 along the instrument housing 1, and this flexible printed wiring board 2 has a wedge base lamp socket 3 used for instrument lighting and display lighting, and an electrical connection. A conductive circuit pattern 5 is formed by connecting a conductive portion 4 connected to the conductive portion 4 and an electric cable wired from a battery (not shown) via a coupler.

The instrument housing 1 has a mounting hole 6 formed at a suitable location for mounting and fixing a wedge base lamp socket 3 used for instrument lighting and display lighting, and a notch 7 on the peripheral surface continuous with the mounting hole 6. are formed, and a pair of conductive tongues 8 of the flexible printed wiring board 2 are formed in the mounting hole 6 to protrude.

The lamp socket 3 is formed with a pair of arc-shaped cylinder parts 10 that protrude upwardly with a gap in between, into which the wedge base lamp 9 is inserted.
1 is formed to protrude, and a flexible annular packing 12 made of rubber or the like is attached to this flange 11 portion. A locking protrusion 13 that engages with a notch 7 provided in the mounting hole 6 is provided on the circumferential surface 10a of the arc-shaped cylindrical portion 10.

Further, a pair of conductive terminals 16 are housed in the lamp socket 3, and each of the conductive terminals 16 has a clamping piece 15 extending therethrough and is in electrical contact with the thin lead wire 14 of the wedge base lamp 9. It is arranged in the gap between the cylindrical parts 10. Conductive terminal 16
A contact piece 17 is formed at the upper end of the flexible printed wiring board 2 to make contact with the conductive portion of the conductive tongue piece 8 of the flexible printed wiring board 2 for electrical connection.

Furthermore, the flange 1 formed on the lamp socket 3
1 is provided with a first position regulating portion 18 that protrudes so as to surround the outer part of the annular packing 12, and also has a raised portion continuous with the locking protrusion 13 provided on the circumferential surface 10a of the circular cylinder portion 10. A second position regulating section 20 is provided below the wall 19. Note 2
Reference numeral 1 denotes a hole for punching out the lamp socket 3.

Then, insert the wedge base lamp 9 into the lamp socket 3, and connect the thin lead wire 14 of the lamp 9.
After holding the lamp in contact with the conductive terminal 16, insert the locking protrusion 13 of the lamp socket 3 along the notch 7 of the mounting hole 6 formed in the instrument housing 1, and then rotate the lamp socket 3 in one direction to install it. The contact piece 17 of the conductive terminal 16 comes into pressure contact with the conductive tongue piece 8 at the inner circumference of the hole and becomes conductive, but even when the lamp socket 3 is attached to the housing 1 in this way, The outer part of the annular packing 12 is the first position regulating part 1
8 restricts outward deformation and movement, and the inner part of the packing 12 is connected to the circumferential surface 10a of the arc-shaped cylinder part.
Movement toward the locking protrusion 13 side, that is, falling off from the lamp socket 3, is prevented by a second wall provided on the rising wall 19 below the locking protrusion.
It is regulated by the position regulation section.

Thereby, when the lamp socket 3 is attached to the housing 1, there is no fear that the gasket 12 will fall off from the socket 3, and the efficiency of the assembly work can be improved.

In addition, the inner part of the packing 12 is an arcuate cylinder part 1.
Since the diameter of the flange 11 of the socket 3 can be made smaller than the conventional one, the mounting density in the instrument housing 1 can be increased. The installation space taken up above can be minimized,
This can also improve the arrangement of other parts.

Furthermore, when the packing 12 is disposed on the flange 11 as shown in FIG. 3, the packing 12 is placed above the die-cutting hole 21 formed in the flange 11. It is possible to prevent rainwater etc. from entering through the die-cutting hole 21, and it is possible to maintain a good conduction state between the contact piece 17 of the lamp socket 3 and the conductive part 4 of the flexible printed wiring board 2, thereby preventing electric leakage and conduction failure. It can be prevented.

[Effect of idea]

As described above, the present invention forms a mounting hole for attaching a lamp socket in a housing, provides a notch at a suitable position on the inner surface of this mounting hole, and arranges a flexible printed wiring board along the housing.
A pair of conductive tongues drawn from a flexible printed wiring board are protruded so as to face the mounting hole, and a pair of terminals electrically connected to the lead wire of the wedge base lamp is enclosed in the lamp socket. A contact piece electrically connected to the conductive tongue piece is formed on each terminal, a locking protrusion is formed on a pair of arcuate tubes of the lamp socket, and a flange is formed on the outside of the arcuate tube. , arrange an annular packing on the flange facing the housing side, insert the locking protrusion into the notch in the mounting hole, rotate in one direction to attach the lamp socket to the housing, and then insert the lamp socket in the mounting hole. In the lamp socket mounting device, the contact piece is pressed into contact with the conductive tongue piece to establish electrical conduction, and the first lamp socket is formed on the outer edge of the flange so as to protrude so as to surround the outer part of the annular packing.
In addition to providing a position regulating portion, the position of the inner shell portion of the annular packing is regulated by the arc-shaped cylindrical portion of the lamp socket, and a second position regulating portion is formed by a rising wall below the locking protrusion. To provide a lamp socket device which can prevent a gasket from falling off from a lamp socket, can reduce the outer diameter of the lamp socket itself as much as possible, and is not subject to restrictions such as size and shape when attached to an instrument housing. It is something that can be done.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an exploded perspective view of the lamp socket, and FIG. 2 is an exploded perspective view of the lamp socket.
3 is a sectional view showing the assembled state, FIG. 3 is a sectional view of the main part showing the position regulating part, and FIG. 4 is an exploded perspective view of the meter housing and the lamp socket. DESCRIPTION OF SYMBOLS 1...Housing, 2...Flexible printed wiring board, 3...Lamp socket, 6...Mounting hole, 7...Notch, 8...Conductive tongue piece, 9...Wedge base lamp, 10...Yen Arc-shaped cylinder part, 11
... Flange, 12 ... Annular packing, 13 ...
Locking protrusion, 14... Thin lead wire, 16... Terminal, 17... Contact piece, 18... First position regulating part, 19... Standing wall, 20... Second position regulating part.

Claims (1)

[Scope of utility model registration request] A mounting hole for attaching a lamp socket is formed in the housing, and a notch is provided at a suitable place on the inner surface of this mounting hole. A flexible printed wiring board is arranged along the housing, and the flexible printed wiring board is pulled out from the flexible printed wiring board so as to face the mounting hole. A pair of turned conductive tongues are formed to protrude, and the lamp socket includes a pair of terminals that are electrically connected to the thin lead wires of the wedge base lamp, and each terminal is electrically connected to the conductive tongues. a contact piece is formed on the lamp socket, a locking protrusion is formed on a pair of arcuate cylinder parts of the lamp socket, a flange is formed on the outside of the arcuate cylinder part, and an annular packing is arranged on the flange facing the housing side. and insert the above locking protrusion along the notch in the above mounting hole,
In the lamp socket mounting device, the lamp socket is rotated in one direction to mount the lamp socket in the housing, and the contact piece of the lamp socket is pressed against the conductive tongue piece in the mounting hole to establish electrical conduction. A first position regulating part is provided to protrude so as to surround the outer part, and the position of the inner part of the annular packing is controlled by the arcuate cylinder part of the lamp socket, and by the rising wall below the locking protrusion. A lamp socket device characterized in that a second position regulating portion is formed at the lamp socket.