JPS5859502A - Lamp apparatus for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp in which printed wiring is provided on one side of a pack cover and the pulp is held horizontally to reduce the overall thickness of the lamp.

Conventional vehicle lamps, for example, use pulp a as shown in Figure 1.
In order to hold the holder C, a holder C is provided protruding from the inner surface of the pack cover b provided on the rear surface of the housing H, and a metal cylindrical socket d is press-fitted into the holder C, and the negative side cord f is inserted into the holder C. is sandwiched between the holder C and the socket d, and the socket d and the pulp pro metal part e are brought into contact to form a connection on the ground side. Also, the positive side is code hK
Connected button contact Lt-47 schulator jr
C is attached by crimping, and this is pressed into contact with the positive terminal AK of pulp A using a coil spring k to make a positive connection. .

However, in such conventional wheel lamps, the electrical connection between the socket (d) and the part of the pulp cap is established by the upward biasing force of the pulp prong part (e) by the coil spring k. 6 only at the part where the inner surface of and the upper part of the locking protrusion n of the palpro metal part e contact,
The contact is poor, and the negative cord f is clamped between the socket d and the holder C, making the electrical contact unstable, and since the wiring uses vinyl-covered wires, wiring processing is required. When doing this, many processes such as cutting, bathing, and caulking must be performed, which makes the productivity of the lamp extremely low, and the manual processing results in Kw4 wiring.
As a result, the number of inspection processes has increased, and the number of signal lights on the rear of woodcutter has increased significantly due to the increase in the number of pulps due to the increase in size, the increase in wiring, and the increase in size. For this reason, in recent years, although not shown in the drawings, improved lighting equipment has been proposed in which a 7-flex printed circuit board is wired on the inner surface of the back cover to eliminate problems such as incorrect wiring. In the lamp, as in the example shown in FIG. 1, the pulp a is arranged in the direction of the lamp axis Y-Y, so the distance 1i1T from the tip of the pulp a to the bottom of the cover b is large, and the entire lamp is tilted upward. However, there are drawbacks such as the lighting fixtures becoming detached from the mold (larger).

Therefore, although not shown in the drawings, recently a vehicle lamp has been developed in which the pulp is installed parallel to the inner surface of the pack cover. ing.

However, in such a lighting device, the holder, socket, insulator, spring, data contact, etc. are assembled to the back cover using vinyl horizontal cord wiring, so the assembly work is difficult. It is complicated and difficult to assemble, and if the pulp is placed next to it, the heat of the pulp directly heats the pack cover, so there is a problem with the heat resistance of the back cover, so it is necessary to keep it at a certain distance. There are drawbacks such as the fact that the lamp cannot be made as thin as expected.

The present invention was developed in view of the above-mentioned circumstances, and the present invention aims at automatic wiring by using a flexible printed circuit board, and also incorporates a harness assembly such as a socket holder, which has been made into a unit in advance, into the back cover. The object of the present invention is to provide a new vehicle lamp that greatly simplifies the assembly work, mounts the pulp on the side, and allows the entire lamp to be made thinner.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the implementation of a vehicle lamp according to the present invention will be described below with reference to the accompanying drawings.

The illustrated embodiment of the present invention shown in FIGS. 2 to 8 is applied to a tail light for an automobile. In the figure, 1 is a housing, and the bottom surface of the housing 1 has a plate-shaped plate made of synthetic resin. The back cover 2 is joined, the light bulbs 3, 3 are arranged horizontally in a row, and the light bulbs 3, 3 are placed on the bottom of the pack cover 2. The main point is to construct a circuit by laying down a flexible printed circuit board 9 (hereinafter abbreviated as FPC). In this example, the light bulb 3
is a diagram using a double filament and the light bulb 3' is a single filament, but the explanation will be based on the case of the double filament shown on the left side of *Km2 diagram, and the single filament will be omitted as it follows this example 0 First F' As shown in Figure Iga, the shape and circuit of the PC 11 is such that in order to arrange a negative circuit 91j and a positive circuit 92 and 9i to the light bulb 3, the negative terminal has a negative tongue as a contact part with the light bulb 3. FPC9 is trimmed on piece II4, and on the glass side, leave one side of the positive loop. In addition, the minus tongue piece 94 has two slot holes 95 for caulking the socket 6 of the light bulb 3. Plus loop piece 9
3 has a connecting part 92 for contacting the contact terminal with the light bulb 3.
, 92 are configured as the terminals 5 of the plus circuits 92 , 92 .

The negative and positive circuits are located approximately at the center of the FPC 9, and the glass circuits 92, 92 are connected to a part of the connector (not shown) as terminals 92'', 92'', and the negative circuits are connected to a connector (not shown). 91 leads out a circuit in parallel as the terminal □"child 91'.The FPC 9 having the above-mentioned circuit is attached to the bottom surface of the pack cover 2 by gluing, etc., but in this case, the above-mentioned! The negative tongue piece 94 of the negative circuit 91 and the positive loop piece 93 of the positive circuit have free ends without being bonded. 1o is a heat shielding surface using conductive metal on FPCe for overheating effect.

Next, in some structures, the holder 5, which is made of synthetic resin, has two hooking legs si, 5itN, to which the light bulb 3 is attached.
The insulator 8 has support rods 81, 81 with cutout windows 52, 52 cut out on both sides, and peel-off holes 8.53 are bored in the back.

The socket 6 of the light bulb 3 is made of cylindrical metal, with hook holes 8, 63 cut in one end for locking the engaging protrusion 32 of the light bulb, and openings 61, 61 cut in both sides. Caulking legs 62, 62 are provided protruding from the missing ends. Further, in order to conduct the positive circuits 92, 92, a silk-like insulator 8 is provided with support rods 81, 81 protruding from both sides.
Moreover, the caulking projections 82, 82 are provided integrally.

Since the positive loop piece 93 of the facing FPC 9 has a free end, the size of the positive loop is increased by 93% on the support rod 81.81 inside the insulator 8.
The caulking projections 82, 82 are melted and caulked. Next, the insulator 8 with the front 1 glass loop half fixed toward the inside of the cylinder of the socket 6 is attached to its support rod 81 ,
81 is guided and inserted into the opening 61 of the socket 6, and then the coil spring 7 is inserted. When loading the above-mentioned block into the holder 5, first insert the caulking holes 95, 95 drilled in the negative tongue piece 6 at the free end of the negative circuit 91 into the caulking holes 53, 53 on the back of the holder 5. By aligning the caulking legs 62, 62 of the socket 6 and bending the caulking legs 62, 62 so as to make them come into close contact with the surface of the minus tongue piece 94, conduction is established and the pieces are fixed at the same time. It is. In order to attach the holder 5, which has completed the conductive circuit, to the bank cover 2, the hooking legs 51, 51 are firmly pressed from the upper portions of the locking protrusions 21, 21 protruding from the bank cover 2. let Note that 22 and 22 are fixed projections.

The light bulb 3 is inserted into the socket 6 facing in the horizontal direction, and is elastically fixed in the hook hole 63 against the spring 7.
On the positive side, a circuit is formed between the positive connection part 92 and the anode terminal (not shown) of the light bulb 3, and on the negative side, the negative connection part 91' and the caulking leg part 62 pass through the socket 6 to the base part 31 of the light bulb 30. Contact with a portion of the connector (not shown) from the power supply is achieved from the positive circuits 92, 92 to the glass terminals 92#, 92'', and from the negative circuit 91 to the negative terminal 91''. Finally, the lens 4 is mounted on the front surface of the housing 1 to complete the lamp.

In the lamp with the above configuration, the FPC 9 is first trimmed and the positive loop piece 93 and the negative tongue piece 94 are brought out as free ends and brought into direct contact with the light bulb 3, so the structure is simple and the number of parts is small. Moreover, the heat resistance of the FPC film and the heat dispersion of the conductive metal film are utilized to prevent the light bulb 3 from being deformed by heat even when the light bulb 3 is placed horizontally and close to the pack holder 2. It can be designed to be thin (height and thickness). Further, since some reflection from the conductive metal film is slowed down, reflected light can also be increased, which is advantageous for light distribution.

As is clear from the above embodiments, the vehicle light J of the present invention
Step 4: Trim the flexible printed circuit board so that the positive and negative circuits are free ends, press the contact surface of the positive circuit directly against the terminal of the light bulb, and connect the negative circuit with the socket at the back of the holder. By using the FPC surface at the bottom of the light bulb for heat shielding, the stain bulb is placed horizontally in the holder, and moreover, it is attached close to the pack holder. , the thickness of the lamp can be made thinner, the number of parts is smaller, the number of assembly steps is reduced due to @-type design, and moreover, the amount of reflected light can be utilized.

Note that the vehicular lamp of the present invention is not limited to the above-described embodiments.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a conventional lamp. 2 to 8 show an embodiment of the vehicle lamp of the present invention, FIG. 2 is a front view showing the inside, FIG. 3 is a cross-sectional view, and FIG. 4 is a circuit of a flexible printed circuit board and a heat section. Figure 5 shows the relationship between the socket, a part of the holder, and the conductive board, excluding the light bulb. The figure is a view in the direction of arrow A with the light bulb removed in Figure 3, with part of the cross section taken by
Figure (A) is a perspective view of the insulator, and Figure (B) is a front view of the positive loop piece seated on the insulator. 1...Housing, 2...Bank cover, 3...
・Light bulb, No....Lens, 5...Holder, 52...
Insulator guide cutout window, 6... socket, 61
...Opening, 7...Spring, 8...Insulator, 9...FPC. 91...Minus circuit, 92...Plus circuit, 93
...Plus loop piece, 94...Minus tongue piece, 10
...Heat shielding surface. Patent Applicant Ichikoh Industries Co., Ltd. Agent Patent Attorney Tadashi Akimoto Figure 1 Figure 5 (a) (b) Figure 6 740) Figure 8 (a) 2 (b)

Claims (1)

[Claims] Attach a flexible printed board that defines a negative circuit, a positive circuit, and a heating circuit to the bottom of the pack cover fixed to the bottom of the frame-shaped housing. The contact piece between the circuit and the bulb terminal was trimmed so that it became a free end, and an insulator with the positive circuit contact piece seated was elastically attached to the inside of the drum-shaped holder so that the miniature light bulb could be installed sideways. At the same time, the socket is installed and the contact piece of the negative circuit is tightened on the back of the holder to form a circuit, and the light bulb is brought close to the pack cover having the heating surface and elastically engaged in the lateral direction. A vehicle light that is designed to be used as an ell.