JPH024401Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle lamp suitable for use as a tail light, a stop light, etc.

[Conventional technology]

Vehicle lights such as tail lights and stop lights that are installed at the rear of the vehicle have a retroreflector part that is integrated or integrated with the front lens, and this retroreflector part retroreflects light from a following vehicle in the direction of incidence. By making the driver of the vehicle following aware of the presence of the own vehicle, it prevents rear-end collisions and ensures road traffic safety. Further, this type of lamp has a parabolic reflector, and a socket for holding a light bulb is provided in the center of the mirror. 7th
The figure shows a conventional example of this type of lamp, and to briefly explain it, a lamp 1 includes a lamp socket 3 that holds a bulb (light source) 2, and a lamp socket 3 that holds a bulb (light source) 2, and an inner surface of which has a reflective surface 13. A front lens 6 is provided at the front opening of the lamp body 4 via a gasket 5 and has a diffusion lens 10 made of a convex lens for diffusing the light from the bulb 2. . Further, a retroreflector 8 is integrally formed on a part of the inner surface of the front lens 6.

Note that the retroreflector 8 has a flat surface on the front side,
A large number of well-known retroreflective elements 9 (see Utility Model Application Publication No. 51-4273) consisting of cubic corner-shaped protrusions having three planes perpendicular to the back side are formed, and these reflective elements 9 reflect light 12 incident from the outside. The light is retroreflected on the three planes in the same direction as the direction of incidence.

[The problem that the idea attempts to solve]

By the way, since the conventional lamp 1 uses the bulb 2 as a light source, it must be structured so that the bulb 2 can be easily replaced when the filament breaks. Further, since the socket 3 is provided at the center of the reflective surface 13, there is a problem that a part of the reflective surface 13 becomes invalid (range B in the figure). In addition, the bulb 2 consumes a large amount of power and generates a significant amount of heat, so it is necessary to have a heat-resistant structure. Therefore, the present invention was devised in view of the above-mentioned conventional problems, and its purpose is to use light-emitting diodes instead of bulbs and to devise the mounting position of the light-emitting diodes. An object of the present invention is to provide a vehicular lamp which can effectively utilize the entire inner surface of a body as a reflecting surface, reduce heat generation and power consumption, and improve lighting effects.

[Means to solve the problem]

In order to achieve the above object, the vehicle lamp according to the present invention includes a lamp body whose inner surface forms a reflective surface;
a front lens having a retroreflector portion formed in a part of the inner surface and provided so as to close the front opening of the lamp body; a holding member disposed at the peripheral edge of the front opening of the lamp body; A plurality of light emitting diodes are provided on the member and are oriented toward the reflective surface of the lamp body, and the light emitted from the light emitting diodes is reflected forward by the reflective surface of the lamp body and guided to the front lens. This is how it was done.

[Effect]

Since the present invention uses a light emitting diode as a light source, it has a semi-permanent life without any filament breakage, there are fewer restrictions on the lamp itself and its mounting position, and the reflective surface can be used effectively. It generates less heat and consumes less power.

〔Example〕

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

FIG. 1 is a sectional view showing an embodiment of the present invention applied to a high-mounted stop lamp, and FIG. 2 is a perspective view of an automobile equipped with the same lamp.
In these figures, reference numeral 20 denotes a high-mounted stop lamp installed outside the rear of an automobile 21, for example, at the center of the upper part of the rear window 22, and this lamp 20 is a lamp body 2 that opens toward the rear of the vehicle.
5, and a front lens 26 that closes the front opening of the lamp body 25.

The lamp body 25 is formed to be long in the left-right direction, and its inner surface forms a reflective surface 27 formed of a paraboloid.

The front lens 26 is made of a translucent resin such as acrylic resin, and approximately 1/3 from the top and 1/3 from the bottom are shaped like a cube having three planes perpendicular to the back side of the lens. By forming a large number of retroreflective elements 28 consisting of corner-shaped protrusions, the retroreflector parts A ₁ and A ₂ are respectively configured,
The remaining central portion constitutes a light-transmitting portion B by densely forming a large number of convex lenses 29 constituting prism lenses on the back side. Note that the entire surface of the front lens 26 is formed into a flat surface.

Reference numerals 30 and 31 denote a pair of upper and lower holding members that are disposed on the peripheral edge of the front end of the lamp body 25 so as to face each of the retroreflector portions A ₁ and A ₂ in parallel with each other. Reference numeral 31 is formed into a plate shape of aluminum or the like, and has a plurality of diode housing portions 33 formed of approximately hemispherical recesses on the back surface thereof.
are formed in two rows, upper and lower, at a predetermined interval in the left-right direction. A light emitting diode 35 is disposed in each diode storage section 33 so as to face the reflective surface 27 of the lamp body 25.

In this case, in this embodiment, a conductive foil 3 disposed in the diode storage portion 33 via an adhesive is used.
An intermetallic compound semiconductor chip 37 such as gallium phosphide (GaP), gallium aluminum phosphide (GaAlP), gallium arsenide phosphide (GaAsP) is disposed on the semiconductor chip 37 and each of the diode holding members 3
0 and 31 are connected to another conductive foil 38 disposed on the back surface of the diode holding members 30 and 31 using a gold wire 39. For example, as shown in FIG. Cover with epoxy resin 40,
A commercially available light emitting diode 43 with a molded light emitting diode 35 or a semiconductor chip (not shown) protected with an envelope 42 made of epoxy resin or the like as shown in FIG.
A plurality of diode holding members 3 are mounted at predetermined intervals on the diodes 4, and a diode holding member 3 is mounted in the center of each diode storage portion 33.
Diode insertion hole 4 opened on the surface side of 0, 31
5, and the light emitting diode 43 may be inserted into the diode insertion hole 45 so that its tip protrudes into or faces into the diode storage section 33. The light emitting diodes 35 or 43 are connected in series in each column and in parallel to a power source (not shown). In addition, 46,4 in Figure 3
7 is an adhesive. In addition, each diode storage section 3
The surface of No. 3 forms a reflective surface.

The lamp body 2 is attached to the back side of the holding member 31.
A protruding portion 60 protruding to the outside of the light emitting diode 5 is integrally provided, and this protruding portion 60 constitutes a circuit terminal portion of the light emitting diode 35, and is configured to be connected to a connector 61 shown by a chain line. In this case, if the holding member 30 is manufactured separately from the holding member 31, it is necessary to provide the holding member 30 with a similar protruding portion constituting the circuit terminal portion. It will be easily understood that if the upper and lower sides are used as the holding members 30 and 31, only one protrusion is required.

In the high mount stop lamp 20 having such a configuration, when the light emitting diodes 35 are turned on all at once, the light 5 emitted from the diodes 35
0 is directly rearward or is reflected by the surface of the diode storage part 33 and directed rearward, and is reflected forward by the reflective surface 27 of the lamp body 25 and transmitted through the transparent part B of the front lens 26 to the outside. Emits light. Therefore, the transparent portion B is brightly illuminated.

On the other hand, among the light from the following vehicle, the light 51 that irradiates each of the retroreflector portions A ₁ and A ₂ is retroreflected by each retroreflection element 28 in the same direction as the incident direction. ₁ and _A2 shine brightly, alerting drivers of the vehicle behind you to their presence and alerting them. Also, when braking, the resistance in the circuit is switched and each light emitting diode 35 emits light brighter than the brightness when normally lit.
By illuminating the transparent portion B more brightly, the attention of the driver of the following vehicle is called to attention.

Here, since the light emitting diode 35 is used as a light source in the present invention, it generates significantly less heat and consumes less power than the general bulb shown in FIG. As a result, the material of the component parts is not restricted, and the degree of freedom in design is expanded. Furthermore, since the light emitting diode 35 does not have a filament, it will not break, and if it does not break, there is no need to replace it, so there is no need to remove the lamp from the vehicle body, and therefore there are fewer restrictions on the mounting position. Furthermore, since there is no need to attach a socket to the lamp body 25,
It has excellent advantages such as being able to effectively utilize the entire reflecting surface 27.

FIG. 5 is a sectional view showing another embodiment of the present invention. In this embodiment, the lamp body 25 has a substantially V-shaped cross section, the inner surface of the curved part is a reflecting surface 27 made of a paraboloid with F as the focal point, and the front lens 2
A holding member 30 is fixed to the inner surface of the light emitting diode 6, and a plurality of light emitting diodes 3, for example, three light emitting diodes 3, are fixed to the holding member 30.
5 is arranged. Each light emitting diode 35
are arranged on concentric circles centered on the focal point F,
They are each oriented in the direction of the reflective surface 27. Note that the same constituent members as those in the above embodiment are indicated by the same reference numerals, and the explanation thereof will be omitted.

It is clear that the same effects as in the above embodiment can be obtained also in such a configuration.

FIG. 6 is a sectional view showing another embodiment of the present invention. In this embodiment, a ring-shaped holding member 30 is attached to the front lens 26 on the peripheral surface of the lamp body 25.
The light emitting diode 35 is directed toward the focal point F of the reflective surface 27.

Although the present invention has been described with reference to the case where it is applied to a high-mounted stop lamp, it is not limited to this in any way, and it goes without saying that it can be applied to general tail lights, brake lights, etc.

[Effect of idea]

As mentioned above, the vehicle lamp according to the present invention is
Since a light emitting diode is used as a light source instead of a general light bulb, and the light emitting diode is installed on the inner edge of the lamp body, there is no need for a socket and the entire reflective surface of the lamp body can be used effectively, thus emitting light. The light emitted from the diode can be effectively reflected toward the front lens, improving lighting effects. Also,
There is no need to replace the filament due to breakage, so it has a semi-permanent lifespan, and there is no need for a design that takes replacement into consideration, and there are fewer restrictions on the lamp itself and its mounting position. In addition, light emitting diodes not only consume less power, but also generate significantly less heat.
There is no need for a heat-resistant structure. Furthermore, since the light-transmitting portion of the front lens is indirectly illuminated, it constitutes a surface light source, and the light-emitting diode is not visible from the outside through the light-transmitting portion.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention applied to a high-mount stop lamp, Fig. 2 is a perspective view of an automobile equipped with the same lamp, and Figs. A sectional view showing another embodiment, and FIG. 7 is a sectional view showing a conventional example of a lamp. 20...High mount stump lamp, 25...
...Lamp body, 26...Front lens, 27...Reflective surface, 28...Retroreflective element, 30, 31...Holding member, 33...Diode storage section, 35, 43
... Light emitting diode, A ₁ , A ₂ ... Recurrence reflector section, B ... Transparent section.

Claims (1)

[Scope of utility model registration request] a lamp body whose inner surface forms a reflective surface; a front lens having a retroreflector portion formed on a part of the inner surface and provided so as to close a front opening of the lamp body; and a peripheral edge of the front opening end of the lamp body. a holding member disposed on the holding member;
The lamp includes a plurality of light emitting diodes oriented in the direction of the reflective surface of the lamp body, and the light emitted from the light emitting diodes is reflected forward by the reflective surface of the lamp body and guided to the front lens. Lighting equipment for vehicles.