JPS6052524B2 - Vehicle lights - Google Patents

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 the inner surface of a back cover and a bulb is held sideways to reduce the overall thickness of the lamp.

For example, as shown in Fig. 1, a conventional vehicle lamp has a holder c protruding from the inner surface of a back cover provided on the rear surface of the housing H to hold the bulb a, and the holder c has a metal cylindrical shape. The socket d is press-fitted, and the negative cord f is sandwiched between the holder e and the socket d, and the socket d and the valve prong metal part e are brought into contact to establish a connection on the ground side.

Also, the positive side is the button contact i connected to the cord.
is attached to the insulator j by pressure-bonding, and this is pressed into contact with the positive terminal 1 of the valve a using a coil spring to form a positive connection. However, in such conventional vehicle lamps, the electrical connection between the socket d and the bulb holder part e is achieved by the upward biasing force of the bulb holder part e caused by the coil spring.
This is only the part where the inner surface of the J-slot m and the upper part of the engaging protrusion n of the valve block metal part e make contact, and the contact is poor, and the negative side cord f is pinched between the socket d and the holder e. Since the electrical contact is not stable due to the pressure welding, and because the wiring uses vinyl-coated wires, many processes such as cutting, welding, and caulking must be performed when processing the wiring, which makes the lighting equipment The productivity of this type of rear signal light is extremely low, and manual processing leads to incorrect wiring, which in turn increases the number of inspection steps.In addition, this type of rear signal light has an increased number of bulbs, wiring complexity, and larger size due to the larger size. It is increasing. Therefore, in recent years, improved lighting equipment has been proposed, such as wiring a flexible printed circuit board on the inner surface of the back cover (not shown) to eliminate problems such as incorrect wiring. As in the illustrated example of the lamp in FIG. 1, since the bulb a is arranged in the direction of the lamp axis Y-Y, the distance T from the tip of the bulb a to the bottom of the cover b is large, and the lamp as a whole becomes deep. In addition, the lamps have become thicker (
There are deficiencies such as increased size (larger size). Recently, although not shown in the drawings, a vehicular lamp has been developed in which the bulb can be mounted parallel to the inner surface of the back cover, and a lamp has been proposed in which the overall thickness of the lamp can be made thinner. However, in such a lighting device, the holder, socket, insulator, spring, button contact, etc. are assembled to the back cover using vinyl-covered cord wiring, which makes the assembly work complicated and difficult. In addition, since the heat from the bulb directly heats the back cover, there is a problem with the heat resistance of the back cover, so it is necessary to keep a certain distance from the back cover, and for this reason, it is not possible to make the lamp as thin as expected. There are drawbacks such as.

This invention was made in view of the above circumstances, and its purpose is to improve the efficiency of wiring by using a conductive strip or a printed circuit board, and to connect the unit to the housing from the back of the bottom of the housing in advance. The assembly work is greatly simplified by incorporating the integrated socket holder, and by mounting the bulb on the side and providing a reflector (heat shield) on the part facing the bulb, the overall width and thickness of the lamp can be reduced. It is an object of the present invention to provide a very advantageous vehicle lamp which can be integrated into one type and at the same time increase the amount of light emitted from the bulb by reflection by its reflector. DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle lamp according to the present invention will be described below with reference to the accompanying drawings.

FIGS. 2 to 6 show an example of the implementation of the present invention, in which a box-shaped housing 1 made of synthetic resin or the like is provided with a ladle-shaped window 2 at the bottom. Separately, the light bulb 3 is placed in the lateral direction, that is, the center line of the light bulb 3 is at the bottom 1 of the housing 1.
A series of socket holder units 4 are installed from the back side of the window portion 2, and are assembled with a bottom plate, a socket holder S, a spring plate, a reflector, and a conductive strip plate to be arranged parallel to the socket holder S. This is a lamp with a lens 5 mounted on the front surface. Although the lamp of the embodiment is equipped with one light bulb each consisting of a double bulb and a single bulb filament, the explanation will be given specifically regarding the double bulb side. First, the circuit configuration of the bottom part 11 of the housing 1 is made by pasting conductive strip plates 6, 6, which are punched out of a conductive thin metal plate and processed into a strip shape, as the positive side on the back 1V side of the bottom part 11, or
Alternatively, the circuit may be constructed using a printed circuit method.

The conductive strips 6, 6 on the light bulb 3 side are led out to the base of the window portion 2, and one connector side is led out to the substantially central side surface of the housing 1 as connection ends 61, 61. On the negative side, place the T-shaped conductive strip 7 at approximately the center of the back surface 1, so that both ends of the T-shaped horizontal line of the conductive strip 7 cross over the head of the ladle character on the window 2. and the connector side is the connecting end 61,
61, the connecting end 71 is led out. The circuit configuration in the housing 1 has been described above, and next, the socket holder unit 4 will be explained.

The holder unit 4 is for holding the light bulb 3 and forming a circuit.The holder unit 4 is for holding the light bulb 3 and forming a circuit.The holder unit 4 holds the light bulb 3 horizontally on the bottom plate 41 in the shape of a ladle so that the central axis is parallel to the bottom surface of the housing 1. A socket portion 42 is provided horizontally for engagement with.

Further, a conductive band plate 8 for conducting conduction on the negative side is seated on the inner wall of the socket portion 42 and brought into contact with the base 31 on the negative side of the light bulb 3. Furthermore, regarding the positive side, in order to make elastic contact with the double bulb terminals 32, 32 of the light bulb 3, the conductive spring plates 9, 9, which are bent into an upper character shape, have notched protruding claws 91, 9.
1 is provided protrudingly, and the upper-shaped bottom plates 92, 92 at the other end are the bottom plates 41.
Further, rectangular locking holes 43, 43 are bored in the bottom of the socket part 42, so that the spring plates 9, 9 are in contact with each other.
The curved portions 93, 93 are force-fitted into the locking holes 43, 43, and the notched protruding claws 91, 91 are secured to the locking portions 44, 44 formed protruding inside the locking holes 43, 43. Furthermore, a flat-bottom dish-shaped metal reflector 45 is placed on the bottom plate 41, and the light bulb 3
It is fixed by adhesive etc. at the position where it touches the glass part. The light bulb 3 is held in place by inserting the base 31 into the socket 42 and pressing against the spring plates 9, 9 while pressing the terminals 32, 32 together. Through the above steps, the socket holder unit 4 is completed. In this case, reference numerals 46 and 46 are positioning protrusions when fitting the bottom plate 41 into the window portion 2. Next, when assembling the socket holder unit 4 to the bottom part 11 of the housing 1, insert the bottom plate 41 of the socket holder unit 4 into the window part 2 from the back side 11'', and screw into the head part of the bottom plate 41. Fix it in place.

As described above, the positive circuit is connected to the spring plates 9, 9 in contact with the terminals 32, 32 of the light bulb 3, the bottom plates 92, 92 in contact with the conductive strips 6, 6, and the connecting ends 61, 61 to the connector. In one negative circuit, the conductive strip 8 in contact with the base 31 of the light bulb 3 is press-conducted to the conductive strip 7 on the bottom 11 of the housing 1, and the connection end 71 is connected to the connector to complete a conductive circuit. Incidentally, the lens 5 is fixedly attached to the front surface of the housing 1. In the above configuration, first, the conductive strips 6, 7, etc. that constitute the circuit are connected to the housing 1.
In addition, the light bulbs 3 are set in the horizontal direction, and since the metal reflector 45 has a heat shielding effect, the light bulbs 3 can be placed very close to each other.

Further, because of this, the height or thickness of the lamp can be designed to be thin, so less material is required, and the use of the luminous flux by the reflector 45 can be increased. Also socket holder unit 4
Since the housing 1 is separated from the housing 1, the total number of parts can be reduced. Even when replacing the light bulb 3, it can be easily handled from the back of the lamp. Overall wiring work is easy and automation is easy. As is clear from the above-described embodiments, the vehicular lamp of the present invention has a box-shaped housing provided with a scoop-shaped window on the bottom surface, and an electrically conductive strip plate attached to the back surface of the housing. A circuit is constructed, and a plate-shaped reflector which also serves as a heat shield is fixed together with a negative side conductive strip on a bottom plate on which a socket holder is placed horizontally so that the central axis of the light bulb is parallel to the bottom of the housing. A series of socket holder units, in which a spring plate is attached to the lower part of the socket holder 1 on the positive side and the bent part of the spring plate is engaged, are fitted into the window of the housing from the back side, and the positive terminal of the light bulb is connected to the positive terminal of the bulb. is in elastic contact with the spring plate and is electrically connected to the conductive strip, while the negative side is electrically connected to the negative conductive strip of the bottom plate of the socket holder unit and the negative conductive strip of the housing by crimping, and the positive Because it is characterized by configuring a circuit by leading both negative conductors to the connector side in parallel,
The thickness of the lamp can be reduced and the amount of reflected light can be increased, resulting in improved light distribution efficiency. In addition, wiring work is easy and requires fewer parts, leading to standardization and automation. Furthermore, it can exhibit many effects such as easy replacement of light bulbs. 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 partial sectional view showing a conventional lamp. Figures 2 to 6 show embodiments of the present invention, Figure 2 is a front view showing the inside of the lamp when a double bulb and a single bulb are installed, and Figure 3 is a sectional view taken along the line of Figure 2. , FIG. 4 is a rear view of the lamp, FIG. 5 is a sectional view of the socket holder unit, and FIG. 6 is a view taken from the direction of arrow A in FIG. 5.1.
...Housing, 11...Bottom, 1"
・Back, 2...Window, 3...Light bulb, 4
...Socket holder unit, 41...
・Bottom plate, 42... Socket part, 43... Locking hole, 45... Reflector, 5... Luns, 6, 7, 8... Conductive band plate, 9...Spring plate.

Claims (1)

[Claims] 1. A window is formed in the bottom of the housing, and a conductive strip or printed circuit board is attached to the back of the bottom of the housing to form a circuit, and the light bulb is connected so that its center axis coincides with the inner surface of the bottom of the housing. A reflector that also serves as a heat shield is fixed to the bottom plate on which the socket holder is placed horizontally, along with a conductive strip plate on the negative side, and a conductive spring plate is bent on the positive side to form the base of the socket holder. The socket holder unit is fitted into the window of the housing, and the positive terminal of the light bulb and the conductive strip on the back of the bottom of the housing are elastically connected via the spring. A vehicular lamp characterized in that a current-carrying circuit is constructed by contacting each other and pressing the connection ends of the conductive strips on the negative side.