JPH0360693B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a lighting device suitable for implementation in a lighting device commonly called a high-mounted stop lamp, which is disposed at the rear of a vehicle body and gives a warning to following vehicles. Regarding.

[Conventional technology]

2. Description of the Related Art A high-mount stop light is known as a lighting device that warns vehicles behind to ensure road traffic safety. This is installed at the driver's eye level on the inside or outside near the rear window, and lights up brightly along with the brake lights when braking, drawing the attention of the driver of the vehicle behind you and preventing rear-end collisions. It is generally constructed as shown in FIGS. 6 and 7. That is, 1 is a housing, 2 is a front lens that closes the front opening of the housing 1, and 3 is a front lens that closes the front opening of the housing 1.
is an element defining member disposed inside the front lens 2, and this defining member 3 is made of a through hole and has a large number of storage recesses 5 for housing each light emitting element, for example, an LED 4, and its front opening The inner circumferential surface of the portion forms a paraboloid of revolution reflection surface 6. Of the light emitted from the LED 4, the direct light that goes forward passes through the front lens 2 and is emitted to the outside, and the light that goes to the side is directed to the reflective surface 6.
By being reflected by the beam, the beam becomes a parallel beam parallel to the optical axis and is transmitted through the front lens 2.

7 is a printed circuit board disposed on the back surface of the defining member 3, and 8a and 8b are lead wires.

Figure 8 is an electrical circuit diagram of a lamp with such a configuration, in which the light emitting elements 4 are connected in series in each column (or row), and the light emitting elements 4 in each column (or row) are connected to the power supply. connected in parallel. R is a lighting resistor.

[Problem that the invention seeks to solve]

However, such a conventional high-mount stop lamp has a problem in that the heat generated by the LED 4 cannot be effectively dissipated, and as a result, the temperature inside the housing 1 increases and the luminous efficiency of the LED 4 decreases. When assembling, the defining member 3 to which the front lens 2, LED 4, and printed circuit board 7 are attached is placed in the housing 1 through the rear opening of the housing 1, and then the rear opening is closed with a back cover (not shown). Since the housing 1 has a box shape, it is not very smart, and when installed outside the vehicle body, it protrudes upward and is difficult to mount. The problem was that it created a lot of air resistance.

Therefore, the present invention aims to solve the above-mentioned problems and provide a vehicle lamp which has good heat dissipation effect, has a gradually updated shape, and can be attached to the vehicle body without causing any discomfort or large air resistance. It is something to do.

[Means for solving problems]

In order to achieve the above object, the present invention includes a V-shaped outer housing, a heat dissipation plate disposed along the upper inner surface of the outer housing, and a heat sink formed in a substantially U-shape below the outer housing. a case made of a translucent material that is disposed along the inner side surface and forms an inner housing together with the heat dissipation plate, and whose front surface closes the opening of the outer housing; A large number of light emitting elements are arranged in a row, and a large number of storage recesses are also arranged in the inner housing to accommodate the light emitting elements, and the inner circumferential surface of the front opening of the recess has a reflective surface. It is composed of an element defining member to be formed.

[Effect]

A heat sink forming the upper surface of the housing effectively radiates heat generated by the light emitting element. Additionally, the outer housing is V-shaped and has low air resistance.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Fig. 1 is an enlarged line sectional view of Fig. 5 showing an embodiment of the present invention applied to a high mount stop lamp, Fig. 2 is an enlarged line sectional view of Fig. 5, and Fig. 3 is an enlarged line sectional view of Fig. 5. - line enlarged sectional view, FIG. 4 is a front view of the main part, and FIG. 5 is a partially broken bottom view of the main part. Components and parts that are the same as those in FIGS. 6 and 7 are designated by the same reference numerals, and their explanations will be omitted. In these figures, the present embodiment includes an outer housing 20 formed in a substantially V shape and elongated in the left-right direction, and an inner housing 21 disposed within the outer housing 20. The outer housing 20 is composed of an upper cover 22 and a lower cover 23, whose one end, that is, the front end of the vehicle body, is connected to each other by welding or the like, and the other end, that is, the rear end of the vehicle body, is spaced apart from each other and has an opening 24. is forming. The outer housing 20 is installed on the roof or rear upper surface of the vehicle body with the opening 24 facing rearward.

The inner housing 21 includes a heat dissipation plate 25 made of an iron plate or the like, a case 26 having a substantially U-shaped cross section that opens upward, and the heat dissipation plate 25 and the case 26.
and a gasket 27 interposed between them, and the element defining member 3 is housed inside. The case 26 is made of a translucent material such as acrylic resin, and its front surface is connected to the outer housing 2.
The front lens 2 is formed to close the opening 24 of the lens. On the inner surface of the front lens 2, a diffusion lens 28 consisting of a large number of small convex lenses for diffusing the light from the LED 4 is densely formed. Since the rear wall 29 of the case 26 is located deep inside the outer housing 20, its height is set lower than that of the front lens 2. The gasket 27 is fixed to the lower peripheral edge of the heat sink 25 by ultrasonic welding or the like, and the case 26 is fixed to the heat sink 25 via the gasket 27 with a set screw 30.
When the inner housing 21 having such a configuration is inserted and held in the outer housing 20, the heat sink 25 is brought into close contact with the inner surface of the upper cover 22, and the lower surface of the case 26 is brought into close contact with the upper surface of the lower cover 23. . Incidentally, a bent portion 31 and a protrusion 32 are provided at the open ends of the upper cover 22 and the lower cover 23, respectively, to prevent the inner housing 21 from coming off.

The element defining member 3 is formed to be long in the left-right direction, and has a large number of storage recesses 5 for accommodating the LEDs 4 formed therethrough in a horizontal line at predetermined intervals, and the inner circumferential surface of the front opening thereof is a reflective surface. 6 is formed.

Thus, according to the high mount stop lamp having such a configuration, since the upper surface of the inner housing 21 is formed by the heat sink 25, the heat generated by the LED 4 can be radiated more effectively than the conventional resin housing. This makes it possible to improve the luminous efficiency of the LED 4. In addition, since the inner housing 21 is sandwiched between the V-shaped outer housing 20, assembly is easy and no back cover is required.Furthermore, since the cross-sectional shape is horizontally V-shaped and streamlined, it can be installed on the outside of the vehicle body. It also looks good and can reduce air resistance.

Note that in the above embodiment, the reflective surface 6 of the element defining member 3
Although the reflection surface is formed into a paraboloid of revolution, the reflection surface is not limited to this and may be formed into a conical shape, a pyramid shape, or the like.

〔Effect of the invention〕

As described above, according to the vehicle lamp according to the present invention, the heat dissipation plate can effectively radiate the heat generated by the light emitting element, so that the light emitting element has good luminous efficiency and improves the illumination effect. In addition, since the external shape is V-shaped, the design is progressively new, and there is no need for a back cover, so it looks good even when installed outside the vehicle body, and has great effects such as reducing air resistance when driving.

[Brief explanation of drawings]

Fig. 1 is an enlarged line sectional view of Fig. 5 showing an embodiment of the present invention applied to a high mount stop lamp, Fig. 2 is an enlarged line sectional view of Fig. 5, and Fig. 3 is an enlarged line sectional view of Fig. 5. - Line enlarged sectional view, Figure 4 is a front view of the main part, Figure 5 is a bottom view of the main part, and Figures 6 and 7 are an external perspective view and a sectional view of the main part showing an example of a conventional high mount stop lamp. , FIG. 8 is an electrical circuit diagram. 2... Front lens, 3... Element defining member, 4...
...LED, 5...Storage recess, 6...Reflective surface, 7...
...Printed circuit board, 20...Outer housing, 21
...Inner housing, 22...Top cover, 23
... lower cover, 24 ... opening, 25 ... heat sink, 26 ... case.

Claims (1)

[Claims] 1 a V-shaped outer housing; a heat sink disposed along the upper inner surface of the outer housing;
a case made of a translucent material formed in a substantially U-shape, disposed along a lower inner surface of the outer housing, forming an inner housing together with the heat sink, and having a front surface closing an opening of the outer housing; , a plurality of light emitting elements arranged in at least one row in the longitudinal direction of the inner housing;
Similarly, a plurality of storage recesses are arranged in the inner housing to accommodate the light emitting elements, and an element defining member is provided, and the inner peripheral surface of the front opening of the recesses forms a reflective surface. Characteristic vehicle lighting equipment.