JPS605441Y2 - vehicle headlights - Google Patents

Description

[Detailed description of the invention] The present invention relates to a new vehicle headlamp, and more specifically, the present invention relates to a new vehicle headlamp that has a reflector part and lens made of synthetic resin, is lightweight, and has sufficient performance in terms of durability. The purpose of this project is to provide a headlamp for use in vehicles.

As vehicle headlights such as headlamps and fog lamps,
Conventionally, all-glass sealed beam lamps in which both the reflector and the lens are made of glass, or metal back semi-shielded lamps in which a glass lens is bonded to the front opening of a metallic reflector, have been used.

However, since the main materials of these conventionally used vehicle headlights are glass or metal, they have the drawback of increasing their overall weight.

Recently, automobiles have come to be equipped with various accessories, which has led to an increase in the overall weight.

Therefore, reducing the weight of individual items installed in automobiles has become an urgent problem.

Furthermore, energy conservation is attracting attention as a global problem that concerns the very existence of humankind, and automobiles are also being affected by this problem.

Therefore, from this point of view as well, efforts are being focused on reducing the overall weight of automobiles to achieve lower fuel consumption and energy savings.

Therefore, headlights cannot be left alone from this problem, and there is a strong desire for a lighter headlight.

Therefore, the present invention aims to reduce the weight by forming the reflector part and the lens from synthetic resin, and also to provide a new vehicle headlamp that solves the problems caused by using synthetic resin. Then, a transparent lens made of synthetic resin is integrally bonded to the reflector part so as to cover the front opening of the reflector part, which is made of synthetic resin and has a reflective surface in the shape of a paraboloid of revolution formed on its inner surface. A scratch-resistant coating is applied to the surface, and a light source section is placed at a predetermined position within the space defined by the reflector section and the lens. It has a flat part that is substantially parallel to the upper flat part, and is characterized in that a heat shield plate is provided between at least the center part of the upper flat part and the light source part.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the vehicle headlamp of the present invention will be explained below according to embodiments shown in the accompanying drawings.

Reference numeral 1 denotes a reflector portion made of transparent synthetic resin and provided with a curved surface 2 in the shape of a paraboloid of revolution.

This reflector part 1 is opened in the front, and the shape of the opening part 3 is a horizontally long rectangular shape. ．．
5r (5r not shown).

A reflective surface 6 is formed on the inner surface of the reflector portion 1, except for the lower flat portion 41, by vacuum evaporation of aluminum or the like.

Although the reflector portion is made of transparent synthetic resin in this embodiment, it is not limited to this, and may be made of opaque synthetic resin.

The synthetic resin for molding the reflector part 1 may be any material as long as it has good moldability and is excellent in strength such as impact resistance, such as polycarbonate resin, polyphenylene oxide resin, acrylic resin, nylon resin, ABS resin. , PBT resin, PET resin, polyether sulfone resin, and the like.

A lens 7 is integrally bonded to the reflector part 1 so as to cover the front opening 3 of the reflector part 1, and is made of transparent synthetic resin such as polycarbonate resin or acrylic resin, and usually has a light-receiving surface on its inner surface. A large number of subdivided lens elements (not shown) for controlling direction and spread.

) is formed.

In addition, synthetic resin has inferior scratch resistance compared to glass,
If numerous scratches occur on the surface of the lens 7 during use, light will be scattered at the scratches and the amount of light directed in the desired direction will be insufficient. Therefore, a scratch-resistant coating 8 is applied to the surface of the lens 7. has been granted.

The scratch-resistant film 8 is applied by coating the surface of the lens 7 with a transparent surface hardening paint such as acrylic resin or melamine resin, but is not limited to this, of course.

Then, the peripheral edge of the lens 7 formed in this way is integrally joined to the opening 3 of the reflector section 1.

The method of integrating the reflector part 1 and the lens 7 is not particularly limited, but they may be joined by, for example, ultrasonic welding, vibration welding (or friction welding), hot plate welding, adhesive bonding, etc. .

9 is a light source unit, which includes a halogen bulb 10 and a holder 11
and warned from Terminal 12, 12.

The terminal 12 is formed by integrally forming a buried piece 13, a caulking piece 14, and an insertion piece 15 using a conductive metal plate.

The buried piece 13 has an elongated shape in the front and back, and a caulking piece 14 is integrally connected to the tip of the piece through a bent step 16.
Caulking claws 17.17 are formed from both side edges of the caulking piece 14 by bending their tips until they come to oppose one side of the caulking piece.

An insertion piece 15 is connected to the rear end of the embedded piece 13 via a bent step 18.

Incidentally, reference numeral 19 denotes a cut-and-raised piece formed on the buried piece 13.

20.20 is a lead wire protruding rearward from the pinch seal portion 21 of the halogen light bulb 10;
0 with the cut and raised pieces 19, 19 of the terminal 12.
, 17 to connect the terminal 12.12 to the halogen bulb 10.

The holder 11 has a short cylindrical shape and is made of heat-resistant synthetic resin such as PPS resin, phenol resin, epoxy resin, polycarbonate resin, etc., and the embedded pieces 13.13 of the terminals 12.12 are embedded in the thickness of the holder 11. buried,
The caulking piece 14.14 is from the tip, and the insertion piece 1 is from the rear end.
5.15 is prominent.

The embedding piece 13.13 is embedded in the holder 11 by, for example, insert molding.

Therefore, when the buried pieces 13.13 of the terminals 12, 12 are buried in the holder 11, there are cut and raised pieces 19, 19 formed in the buried pieces 13.13.
This prevents the terminals 12, 12 from shifting back and forth relative to each other.

Reference numeral 22 denotes a short cylindrical mounting hole formed approximately at the center of the curved surface 2 of the reflector portion 1, and its inner diameter is approximately the same as the outer diameter of the holder 11 of the light source unit 9.

Then, the halogen bulb 10 of the light source unit 9 is inserted through the mounting hole 22 of the reflector section 1 into the space formed by the reflector section 1 and the lens 7, and the holder 11 is fitted into the mounting hole 22.

Then, connect the terminal 12.12 with a light source, turn on the halogen bulb 10, move the holder 11 slightly back and forth or in the rotational direction with respect to the mounting hole 22, and watch the light distribution pattern irradiated in front of the lens 7. The filament 23 of the light bulb 10 is adjusted to be placed at a predetermined position, and then the holder 11 of the light source unit 9 is fixed to the attachment hole 22 of the reflector section 1.

The holder 11 may be fixed to the mounting hole 22 by any suitable method, such as ultrasonic welding, high frequency heat welding, hot plate heat welding, or bonding with an adhesive.

Reference numeral 24 denotes a heat shield plate made of an iron plate, an aluminum plate, or the like, and is arranged close to the upper flat part 4u to isolate the filament 23 of the halogen light bulb 10 from the upper flat part 4u of the reflector section 1.

As described above, in the vehicle headlight of the present invention, the reflector part and lens are made of synthetic resin, so the weight can be significantly reduced compared to conventional ones made of metal or glass. I can do it.

Furthermore, in the past, synthetic resin lenses had poor scratch resistance, resulting in a significant drop in luminous intensity after long-term use, making them extremely impractical for headlights, let alone for taillights or signal lights.
However, in the present invention, since a scratch-resistant coating is applied to the lens surface, the scratch resistance of the lens surface is significantly improved, and therefore, there is no significant decrease in brightness even after long-term use. It has become sufficiently practical.

Furthermore, synthetic resins are generally more susceptible to heat than glass, and there is a problem with using them in high-temperature areas; however, by providing the heat shield plate 24, heat rays can be prevented from flowing to the upper flat part of the reflector, which gets even hotter. Irradiation is blocked and the upper flat part can be prevented from becoming extremely hot.

In addition, if the reflector part is made of transparent synthetic resin and there is no reflective surface on the lower flat part, the heat rays directed toward this part will be transmitted to the outside of the lamp, making it possible to further prevent the lamp from becoming too hot. can.

Even if a reflective surface is provided on the lower flat part, the light reflected there will be directed upward at a steep angle, creating a trailing curtain in front of the vehicle or dazzling oncoming vehicles. Since the harmful light becomes a dimming light, not using a reflective surface to direct this area will not result in any loss of light quantity, but rather has the advantage of preventing the emission of harmful light.

Incidentally, the vehicle headlamp of the present invention according to the above-mentioned embodiment (referred to as Embodiment 1).

) and a heat shield plate, and the vehicle headlight of the present invention is the same as Example 1 except that a reflective surface is formed on the lower flat part (referred to as implementation@2).

) was manufactured, and the temperature of each part was measured after a certain period of time had passed under the condition of an ambient temperature of 70°C. The results are shown in the table.

The measurement points are shown in FIG. The capacity of the halogen bulb used was 35 watts.

[Brief explanation of the drawing]

The drawing shows an example of the implementation of the vehicle headlight of the present invention.
FIG. 1 is a longitudinal side view, FIG. 2 is an enlarged perspective view of the light source unit, and FIG. 3 is an enlarged perspective view of the terminal. Explanation of symbols, 1...Reflector section, 3...
... Opening, 4 ... Flat part, 5 ... Flat part, 7 ... Lens, End ... Scratch-resistant coating, 10 ... ...Halogen light bulb, 23...
Filament (light source part), 24... Heat shield plate.

Claims (3)

[Scope of utility model registration request] (1) A transparent lens made of synthetic resin is integrally bonded to the reflector part so as to cover the front opening of the reflector part using glue made of synthetic resin, which has a paraboloid-shaped reflective surface formed on its inner surface. A scratch-resistant coating is applied to the outer surface, and a light source is disposed at a predetermined position within the space defined by the reflector and the lens. 1. A vehicular headlamp, comprising a flat portion substantially parallel to an axis, and a heat shield plate provided between at least a central portion of the upper flat portion and a light source. (2) A vehicle headlamp according to claim 1, wherein the reflector portion is made of a transparent synthetic resin, and the lower flat portion is not provided with a reflective surface. (3) A vehicle headlamp according to claim 1 or 2, wherein the light source is a halogen bulb.