JPH0514532Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lamp used as a vehicle lamp or a light source for a fax machine, and particularly to a lamp using a large number of LEDs.

[Conventional technology]

Conventionally, as shown in FIG. 6, for example, a substrate 21 on which a predetermined conductive pattern is formed is provided with a large number of LEDs (lamp-shaped type) 22 and a current limiting resistor 2.
3. After attaching the reverse voltage protection diodes 24 and connecting the wire harness 25 by soldering and storing them in the housing 26, attach the outer lens 27 with a predetermined lens cut to the front of the housing 26. It has an attached structure.

[Problem that the invention attempts to solve]

However, in such a structure, the substrate 21
Attach the LED 22 etc. and connect it to the housing 26.
Since the board 21 is housed inside, a storage space for the board 21 is required, making it difficult to make the lamp thinner. Further, since the substrate 21 has less freedom in processing its shape than the housing 26, it cannot effectively radiate heat to the vehicle body frame or the like. Furthermore, in order to match the lens cut of the outer lens 27 to each LED 22 to obtain the required light distribution characteristics, the alignment of the LEDs 22 and the outer lens 27 requires precision in dimensions, but the intervention of the substrate 21 takes time and effort to align. There are some problems.

[Means for solving problems]

In this invention, a predetermined number of reflective frames are integrally molded on the rear inner surface of the housing, and a conductive pattern of a predetermined shape is formed to include a resistance that can be used as a substitute for a current limiting resistor. It is characterized by being equipped with voltage protection diodes, etc., and an outer lens attached to the front of the housing.

〔Example〕

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

Figures 1 to 5 show an embodiment of the present invention, in which a large number of conductive patterns 2 of a predetermined shape are formed on the inner surface of the rear part of a housing 1 so as to contain a resistance that can serve as a substitute for a current limiting resistor. At the tip mount part
The LED chip 3 is die-bonded, and the electrode part and the other pattern 2 are wire-bonded using a gold wire 4. Further, the conductive pattern 2 is also equipped with a reverse voltage protection diode (not shown). Housing 1 is made of polycarbonate or
It is a molded product made of ABS resin, etc., and a reflective frame 1A is integrally molded between the tip attachment points on the rear inner surface.
A mounting portion 1B is integrally formed on the back surface (rear outer surface), and a wire harness (lead wire) 5 is connected thereto. Also, on the front of housing 1,
An outer lens 6 with a predetermined lens cut is attached.

Note that the resistance of the conductive pattern 2 is controlled by the material of the conductive material for the pattern, the pattern width, and the pattern distance.

In this way, the reflective frame 1 is attached to the rear inner surface of the housing 1.
A and a conductive pattern 2 are formed to form an LED chip 3,
If a reverse voltage protection diode or the like is installed, the device will be thinner, and a portion of the light emitted from the LED chip 3 will be reflected by the reflective frame 1A and radiated forward, making effective use of the light emitted. Furthermore, heat generated by the components is quickly radiated to the vehicle body frame and the like through the housing 1.

[Effect of idea]

As described above, according to the present invention, by forming a conductive pattern on the housing itself, a required number of LED chips can be installed.
By mounting a reverse voltage protection diode, etc. and attaching an outer lens to the front of the housing, the internal space of the housing is reduced, making it thinner, and the weight is also reduced by omitting the board and resistors as individual elements. And the number of man-hours can be reduced. Also,
By attaching the component to the housing, the heat generated can be effectively dissipated, and an improvement in luminous efficiency can be expected accordingly. Moreover, since a reflective frame is formed on the inner surface of the rear part of the housing, the light emitted can be effectively utilized even when using ordinary white resin. Furthermore,
There is an advantage in that there is more latitude in selecting the material for the housing, which allows for a reduction in the amount of material and costs.

[Brief explanation of the drawing]

Fig. 1 is a partially broken plan view showing an embodiment of the lamp according to the present invention, Figs. 2 and 3 are front and side views of the embodiment, and Fig. 4 is an LED in the embodiment. FIG. 5 is a sectional view taken along the line -- in FIG. 4, and FIG. 6 is a partially cutaway plan view showing a conventional example. 1... Housing, 1A... Reflective frame, 2... Conductive pattern, 3... LED chip, 4... Gold wire,
5... Wire harness, 6... Outer lens.

Claims (1)

[Scope of utility model registration request] A predetermined number of reflective frames are integrally molded on the rear inner surface of the housing, and a conductive pattern of a predetermined shape is formed to include a resistor that can be used as a substitute for a current limiting resistor, and the required number of LED chips and reverse voltage protection diodes are formed. A light fixture characterized by having an outer lens attached to the front of the housing.