JPH0129930Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention can be used in the field of vehicle lighting, and particularly relates to lighting that uses an LED lamp as a light source.

[Conventional technology] Vehicle lighting using LED lamps as a light source is
As shown in the figure, LED lamp b is attached to printed circuit board a.
are arranged in parallel at a predetermined interval, and a printed circuit board a is attached to a synthetic resin housing c.
The LED lamp b faces the reflective surface d of the housing c. A lens e for light distribution is attached to the front end surface of the housing c.

[Problems to be solved by the invention] According to the above-mentioned conventional example, the reflective surface d of the housing c needs to be plated, and a large number of
Since the LED lamp b is mounted, it generates high heat, but the heat dissipation from the housing c cannot be expected, and there is a drawback that the brightness decreases due to the heat generated.

[Means for Solving the Problems] The present invention was made to solve the above-mentioned conventional problems.In addition to providing a circuit pattern for lighting an LED lamp on the bottom of a metal substrate, both side walls sandwiching the bottom are reflective. The main feature of the present invention is to have a flat surface, electrically connect a bent end portion of a lead frame of an LED lamp to the circuit pattern, and arrange a large number of LED lamps in parallel on the bottom portion.

[Function] Since the metal substrate can also serve as a reflector, there is no need to process the reflective surface, and since the heat dissipation effect is large, reduction in brightness can be prevented.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. Reference numeral 1 is a metal substrate made of an aluminum plate, and a circuit pattern 3 for lighting an LED lamp 2 is provided on the bottom portion 1a of the metal substrate 1. The side walls 1b on both sides are formed into a parabolic shape and serve as reflective surfaces. The LED
In the lamp 2, the lower ends of the lead frame are bent outward from each other, and by soldering the bent parts 2a to the circuit pattern 3, a large number of LEDs can be assembled.
Lamps 2 are arranged side by side on the bottom 1a of the substrate 1.
As shown in FIGS. 3 and 4, the LED lamp 2 can also be mounted via a mounting plate 4 having notches 4a arranged side by side on its upper edge.
That is, the light emitting part 2'b is fitted into the notch 4a of the mounting plate 4 so as to straddle the LED lamp 2', and at this time, the lead frame is provided with bent parts 2'c that protrude inwardly from each other. If this is done, the bent portion will come into pressure contact with the mounting plate 4 and the LED lamps 2' can be temporarily fixed. By soldering the bent portions 2'a of the lead frames of each LED lamp 2' to the circuit pattern 3, the LED lamps 2' can be arranged side by side on the bottom 1a of the substrate 1.

By mounting the LED lamp 2' through the mounting plate 4 in this way, the LED lamp mounting work can be made more efficient, and the mounting plate 4 serves as a supporting member and has a reinforcing effect after mounting. The installation condition is extremely stable. In the figure, numeral 5 indicates components such as chip resistors and protection diodes attached to key points of the circuit pattern 3;
is a lens for light distribution.

Since the present invention is configured as described above,
Since the substrate 1 also serves as a reflector, there is no need to form a reflector by plating or the like as in the past, and since the substrate 1 acts as a heat dissipator, it is possible to prevent the brightness of the lamp from decreasing due to high heat. be able to.

[Effects of the invention] As explained above, this invention is effective for metal substrates.
Since the LED lamp is mounted and the structure also serves as a reflector, there is no need to form a reflector in a separate process, heat radiation is good, the brightness of the lamp does not decrease, and the structure is simple, so it is cost-effective. It has excellent effects such as reducing the amount of down.

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view of essential parts showing one embodiment of the present invention, Fig. 2 is a partial perspective view of a metal substrate, and Fig. 3 is an LED lamp according to another embodiment of the present invention. Figure 4 is an exploded perspective view of the temporary fixing state.
FIG. 5 is a cutaway perspective view of main parts showing a conventional example. DESCRIPTION OF SYMBOLS 1... Metal substrate, 1a... Bottom, 1b... Reflective surface, 2... LED lamp, 2a... Bent part, 3
...Circuit pattern, 4...Mounting plate, 4a...Notch, 5...Parts, 6...Lens.

Claims (1)

[Scope of utility model registration request] A circuit pattern for lighting the LED lamp is provided on the bottom of the metal substrate, both walls sandwiching the bottom are used as reflective surfaces, and the bent end of the lead frame of the LED lamp is electrically connected to the circuit pattern,
A metal substrate that also serves as a reflector is used, which is characterized by a large number of LED lamps arranged side by side on the bottom.
LED lighting.