JPH0218944Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The invention is such that a printed board is placed on the back side of the instrument case, and the lamp socket is fixed by rotating it into the engagement hole formed at an appropriate location. This invention relates to a structure for preventing a lamp socket from falling off in an instrument device.

[Conventional technology]

Conventionally, in this type of instrument device, in order to provide instrument lighting or alarm lighting, a printed board is placed on the back side of the instrument case, a fitting hole is formed at the location where the lamp is installed, and this fitting hole is installed on the back side of the instrument case. A common structure is that a lamp socket with a lamp attached to a hole is rotated and fixed.

That is, as shown in FIGS. 1 and 2,
A printed board 2 for instrument wiring is attached to the back of the instrument case 1 along the outer surface of the case 1, and this printed board 2 is electrically connected to a wedge-based lamp socket 3 used as instrument lighting or alarm lighting. A pair of conductive parts 4 are formed, and a conductive path 5 is formed by running from the conductive part 4, and the conductive path 5 is connected to an electric cord (not shown) wired from the battery side via a coupler or the like.

Further, a hole 6 is formed in the instrument case 1 at a suitable location for inserting the wedge base type lamp socket 3 used for instrument lighting and alarm lighting.
A mounting hole 7 for mounting and fixing the lamp socket 3 on the printed board 2 is formed corresponding to this hole 6, and a notch 8 is formed at a suitable position on the periphery continuous with this mounting hole 7. The conductive portion 4 is formed by being routed by the conductive path 5 .

A cylindrical portion 10 into which the wedge base lamp 9 is inserted is formed protruding from the lamp socket 3, and a flange 11 is formed protruding from the outer periphery of the main body of the lamp socket 3 to be regulated in contact with the printed board 2. A locking protrusion 12 that can be inserted along the notch 8 provided in the mounting hole 7 is provided on the circumferential surface of the portion 10, and a grip portion 12 is provided above the flange 11 when the lamp socket 3 is attached. A handle portion 13 is formed.

Further, a pair of terminals 14 that are electrically connected to the thin lead wires of the wedge base lamp 9 are contained within the lamp socket 3, and extend from the terminals 14 integrally to the flange 11 side to connect to the conductive portion 4 of the printed board 2. A contact piece 15 is formed to electrically connect with.

Therefore, the printed board 2 is attached to the instrument case 1, the locking protrusion 12 of the lamp socket 3 supporting the wedge base lamp 9 is inserted along the notch 8 of the mounting hole 7 formed in the printed board 2, and then By rotating the lamp socket 3 in one direction and connecting it with the bayonet, the locking protrusion 12 comes into contact with the inside of the printed board 2, and the lamp socket 3 is attached and held to the instrument case side, that is, the printed board 2, and at the same time, the lamp 9 side and the conductive path 5 side of the printed board 2 are maintained electrically conductive.

[Problem that the invention attempts to solve]

However, in such a conventional instrument device, a portion of the lamp socket 3, particularly the handle portion 13, protrudes from the outside of the instrument case 1. Therefore, after the lamp socket 3 is assembled and held in the case 1, the instrument case 1 is installed in a car, for example. When assembling it into an instrument panel such as the above, the protruding handle 13 comes into contact with the wire harness installed in the instrument panel and rotates, causing the lamp socket 3 to lift up from the case 1 side and cause the printed board 2 to This may cause poor contact or even fall off from the case 1.

The present invention was devised in view of the above problem, and is designed to maintain the mounted state of the lamp socket even if an external component comes into contact with the protruding part of the lamp socket, thereby preventing poor contact with the conductive path or falling off. It is an object of the present invention to provide a suitable lamp socket holding device.

[Means for solving problems]

In order to achieve the above object, the present invention includes a printed board attached to the back side of the instrument case, holes for inserting the lamp socket into the case at appropriate locations on the instrument case and the printed board, and holes in at least one of the holes. A notch is formed in a part,
The lamp socket is formed with a cylindrical portion into which the wedge base lamp is inserted, and a locking protrusion that can be inserted into the notch of the hole is formed protruding from the circumferential surface of the cylindrical portion of the lamp socket to lock the lamp socket. In the instrument device, the lamp socket is attached to the instrument case by bayonetly connecting the lamp socket to the notch of the hole, and the conductive part of the printed board is connected to the contact piece of the terminal of the lamp socket in which the lamp is assembled. A detent arm piece is integrally formed to protrude from the contact piece, and an engaging portion is attached to the printed board or the instrument case corresponding to the detent arm piece at the bayonet connection position of the locking protrusion and the notch. By providing this, the contact piece of the lamp socket is held in proper contact with the conductive portion of the printed board, and at the same time, the locking arm piece and the engaging portion are fitted and held.

〔Example〕

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

3 and 4 show an embodiment of the present invention, in which a printed board 2 for instrument wiring is attached to the back of the instrument case 1 along the outer surface of the case 1. is a pair of conductive parts 4 that are electrically connected to a wedge-based lamp socket 3 used as instrument lighting or warning lighting.
A conductive path 5 is formed by being routed from the conductive portion 4, and this conductive path 5 is connected to an electric cord (not shown) wired from the battery side via a coupler or the like.

Further, a hole 6 into which the wedge-based lamp socket 3 is inserted is formed in the instrument case 1 at a suitable location, and a mounting hole 7 is formed in correspondence with the hole 6 into which the lamp socket 3 is mounted and fixed on the printed circuit board 2. Continuous with the mounting hole 7, there is a notch 8 at an appropriate location on the periphery.
The conductive portion 4 is formed around the periphery of the mounting hole 7 by the conductive path 5 .

A cylindrical portion 10 into which the wedge base lamp 9 is inserted is formed protruding from the lamp socket 3, and a flange 11 is formed protruding from the outer periphery of the main body of the lamp socket 3 to be regulated in contact with the printed board 2. A locking protrusion 12 that can be inserted along the notch 8 provided in the mounting hole 7 is provided on the circumferential surface of the portion 10, and a grip portion 12 is provided above the flange 11 when the lamp socket 3 is attached. A handle portion 13 is formed.

Further, a pair of terminals 14 that are electrically connected to the thin lead wires of the wedge base lamp 9 are contained within the lamp socket 3, and extend from the terminals 14 integrally to the flange 11 side to connect to the conductive portion of the printed board 2. A contact piece 15 is formed to electrically connect with the contact piece 4 .

Therefore, the contact piece 1 provided on the lamp socket 3
A detent arm piece 16 is further integrally formed to protrude from the detent arm piece 5, and a locking claw 16A is formed at the distal end of the detent arm piece 16.

Further, an engagement hole 17 serving as an engagement portion is provided in the printed board 2 in correspondence with the locking claw 16A of the detent arm piece 16. In this case, the position at which the engagement hole 17 is formed is determined by inserting the lamp socket 3 along the notch 8 of the mounting hole 7 formed in the printed board 2, rotating the lamp socket 3 in one direction, and then aligning the lamp socket 3 with the notch 8 formed in the lamp socket 3. The position is determined such that the projection 12 and the printed board 2 are bayonet-coupled, that is, the contact piece 15 of the lamp socket 3 and the conductive portion 4 of the printed board 2 are maintained in proper electrical contact.

Therefore, by inserting the lamp socket 3 into the mounting hole 7 provided in the printed board 2 and rotating it in one direction, the contact piece 15 of the lamp socket 3 and the conductive part 4 of the printed board 2 are electrically connected, and at the same time, the lamp socket 3 is rotated. The locking claw 16A of the stopper arm piece 16 fits into the engagement hole 17 of the printed board 2, and the lamp socket 3 is properly installed and its rotation is restricted, thereby preventing electrical contact failure or falling off. can be prevented.

5 and 6 show a second embodiment of the present invention, in which a flexible printed board 2A for instrument wiring is attached to the back surface of the instrument case 1 along its outer surface, and this flexible printed board 2A is formed with a pair of conductive parts 4 that are electrically connected to the wedge base type lamp socket 3. A conductive path 5 is formed by running from this conductive part 4, and an electric wire is connected to the conductive path 5 from the battery side (not shown). It is connected to the cord via a coupler, etc.

Further, a hole 6A for inserting and fixing the lamp socket 3 into the instrument case 1 is formed at a suitable position, and a notch 8A is formed at a suitable position on the periphery continuously with this hole 6A.
A hole 7A into which the lamp socket 3 is inserted is formed in the flexible printed board 2A corresponding to the hole 6A, and the conductive portion 4 formed by being routed by the conductive path 5 is formed around the periphery of the hole 7A. It is formed.

A cylindrical portion 10 into which a wedge base lamp 9 is inserted is formed protruding from the lamp socket 3, and an instrument case 1 is connected to the outer periphery of the main body of the lamp socket 3 via the flexible printed board 2.
A flange 11 is formed in a protruding manner, and a locking protrusion 1 that can be inserted along the notch 8A provided in the hole 6A is formed on the circumferential surface of the cylindrical portion 10.
A handle portion 13 is formed above the flange 11 and serves as a grip portion when the lamp socket 3 is attached.

Further, a pair of terminals 14 electrically connected to the thin lead wires of the wedge base lamp 9 are contained within the lamp socket 3, and extend from the terminals 14 integrally to the flange 11 side to connect to the conductive portion of the flexible printed board 2A. A contact piece 15 is formed which is electrically connected to the contact piece 15, and a detent arm piece 16 is further formed integrally protruding from this contact piece 15, and a locking claw 16A is formed at the tip of this detent arm piece 16. There is.

Further, a through hole 18 is formed in the flexible printed board 2A corresponding to the locking claw 16A of the detent arm piece 16, and an engagement hole 17A serving as an engagement portion is bored in the instrument case 1. In this case, a recess may be provided in the instrument case 1 instead of the engagement hole 17A, and the locking claw 16A of the detent arm piece 16 may be fitted into this recess.

Therefore, by inserting the lamp socket 3 into the hole 6A provided in the instrument case 1 and rotating it in one direction for bayonet connection, an electrical connection can be established between the contact piece 15 of the lamp socket 3 and the conductive portion 4 of the flexible printed board 2A. At the same time, the detent arm piece 16
The locking claw 16A fits into the engagement hole 17A of the instrument case 1, and the lamp socket 3 can be properly installed and its rotation can be restricted.

FIG. 7 shows a third embodiment of the present invention. Here, instead of the locking claw 16A of the detent arm 16 shown in the second embodiment, a lock is attached to the tip of the detent arm 16. A hole 16B is formed, and an engagement protrusion 17 serving as an engagement portion on the instrument case 1 corresponds to the latching hole 16B.
B is formed to protrude.

Therefore, when the lamp socket 3 is properly installed in the instrument case 1, the locking hole 16B of the detent arm piece 16 is aligned with the engagement protrusion 1 of the instrument case 1.
7B, and thereby the lamp socket 3
rotation is restricted.

Further, in any of the above embodiments, the detent arm piece 16
is formed by protruding integrally from one contact piece 15, but it is also possible to provide a detent arm piece from each of the pair of contact pieces, and in this case, a printed board or a meter is provided in correspondence with each detent arm piece. The case may be provided with a pair of engaging portions, or an engaging portion into which at least one of the pair of detent arms is fitted may be provided.

In addition, as shown in each embodiment, in the case where only one anti-rotation arm piece 16 is used, two engaging parts are provided on the printed board 2 or instrument case 1 side, so that this engaging part It is possible to fit and fix either one of the two and the above-mentioned rotation prevention arm piece 16 side, and the mounting direction of the lamp socket 3 is not specified.

[Effect of idea]

As detailed above, according to the lamp socket holding structure of the present invention, a printed board is attached to the back side of the instrument case, and holes for inserting the lamp socket into the case are formed at appropriate locations on the instrument case and the printed board. At the same time, a notch is formed in a part of at least one of the holes, and a cylindrical part into which the wedge base lamp is inserted is formed in the lamp socket, and a notch in the hole is formed on the circumferential surface of the cylindrical part of the lamp socket. A locking protrusion that can be inserted into the lamp socket is formed in a protruding manner, and the locking protrusion of the lamp socket is bayonetly connected to the notch of the hole to attach the lamp socket to the instrument case, and the conductive part of the printed board and the lamp are assembled. In an instrument device configured to connect a contact piece of a terminal of a lamp socket, a detent arm piece is integrally formed to protrude from the contact piece, and the rotation stopper arm piece is formed integrally with the contact piece of the terminal of the lamp socket, and the rotation stopper piece is formed integrally with the contact piece of the terminal of the lamp socket. By providing a connecting part on the printed board or the instrument case that corresponds to the stop arm piece, problems such as poor electrical contact and falling of the lamp socket caused by fluctuations in the mounting position of the lamp socket can be solved, and the problem of the lamp socket falling off can be solved. Therefore, it is possible to provide a device of great practical value that can be mounted and held in a suitable position.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the mounting structure of a lamp socket in a conventional lighting device, Fig. 2 is a sectional view of the main parts showing the assembled state of Fig. 1, and Fig. 3 is an embodiment of the present invention. FIG. 4 is an exploded perspective view showing the mounting structure of the lamp socket; FIG. 4 is a sectional view of the main parts showing the assembled state of FIG. 3; FIG. 5 is an exploded perspective view showing the mounting structure of the lamp socket according to the second embodiment of the present invention. 6 is a cross-sectional view of the main parts showing the assembled state of FIG. 5, and FIG. 7 is a cross-sectional view of the main parts showing the mounting structure of the lamp socket according to the third embodiment of the present invention. Instrument case...1, printed board...2, 2A,
Lamp socket...3, Conductive part...4, Hole...
6, 6A, 7, 7A, notch part...8, 8A, lamp...9, terminal...14, contact piece...15, detent arm piece...16, locking claw...16A, locking hole …
...16B, engagement hole...17, 17A, engagement projection...
...17B.

Claims (1)

[Scope of utility model registration request] A printed board is attached to the back side of the instrument case, and holes for inserting the lamp socket into the case are formed at appropriate locations on the instrument case and the printed board, and a notch is formed in a part of at least one of the holes, and the above-mentioned The lamp socket is formed with a cylindrical portion into which the wedge base lamp is inserted, and a locking protrusion that can be inserted into the notch of the hole is formed protruding from the circumferential surface of the cylindrical portion of the lamp socket to lock the lamp socket. In an instrument device in which a lamp socket is attached to an instrument case by bayonet-coupling the protrusion into the notch of the hole, and the conductive part of the printed board is connected to the contact piece of the terminal of the lamp socket in which the lamp is assembled, the above-mentioned contact A detent arm is formed integrally protruding from the piece, and a connecting portion is provided on the printed board or the instrument case corresponding to the detent arm at the bayonet connection position of the locking protrusion and the notch. A lamp socket holding device characterized by: