JPH06176739A - Head lamp for vehicle - Google Patents

Abstract

PURPOSE:To solve the problem such as the generation of glare light to be caused by the structure of a halogen lamp and the generation of the glare light to be caused by the fitting structure and the generation of hardness to locate a flux distribution generating hood for generating the flux distribution and the generation of hardness to obtain the ideal flux distribution characteristic for a low beam in a head lamp using a halogen lamp with infrared ray reflecting film as a light source. CONSTITUTION:A cylindrical metal base 6 having a bottom is fitted to a seal part 2b of a halogen lamp 1 with infrared ray reflecting film, and a flux distribution generating hood 13 for covering a lower half part of the halogen lamp 1 with infrared ray reflecting film is provided integrally with a socket 12 to be fitted to the bottom of a reflecting mirror 11 of a head lamp 10 for vehicle. A spring 13 and a cylindrical negative electrode terminal 13c are also provided in this flux distribution generating hood 13 to hold the lamp 1 and perform the electrifying. Generation of the glare light is reduced, and the intensity is improved, and the generation of flux distribution characteristic for low beam is enabled to solve the problem.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle headlamp which employs a halogen light bulb having an infrared reflecting film formed on the bulb surface as a light source for the purpose of improving luminous efficiency.

[0002]

2. Description of the Related Art FIG. 5 shows an example of the configuration of a conventional halogen bulb 90 with an infrared reflection film of this type.
By providing the infrared reflection film 92 on the outer surface of No. 1, the infrared part in the radiant energy from the filament 93 is reflected and returned to the filament 93 again to improve the efficiency.

At this time, in order for the infrared rays reflected from the infrared reflecting film 92 to reach the filament 93 efficiently, it is necessary to form the light emitting portion 91a in a substantially elliptical shape. Is a so-called double-end type in which sealing portions 91b from which lead-in wires 94 are drawn are provided at both ends of the substantially elliptical light emitting portion 91a.

[0004]

However, when the above-mentioned conventional halogen bulb 90 with an infrared reflecting film is adopted as a light source of a headlight 80 of an automobile, for example, as shown in FIG.
As shown in FIG. 3, the sealing portion 91b is located before and after the light emitting portion 91a, and thus glare light is increased by reflected light or transmitted light at this portion, and it is difficult to obtain a light distribution characteristic that satisfies the standard. However, since the sealing portion 91b is provided at both ends, the total length of the halogen bulb with an infrared reflecting film 90 becomes long, and in addition, in order to supply power to one of the lead wires in the front, the outer lead 95 is used. Is also required, and the mechanical strength against vibration and shock during traveling is insufficient, the outer lead 95 also becomes a major factor in the generation of glare light, and the shape of the bulb 91 causes a light distribution generation hood to be formed. Problems such as difficulty in arranging in the bulb 91 and difficulty in obtaining the passing beam distribution have arisen, and it has been a problem to solve these problems.

[0005]

As a concrete means for solving the above-mentioned conventional problems, the present invention is a double-end type halogen with an infrared reflecting film in which sealing parts are formed at both ends of a light emitting part. In a vehicle headlamp that employs a light bulb as a light source, a cylindrical metal cap having a bottom is attached to the sealing portion of the halogen bulb with an infrared reflection film, and a reflector of the vehicle headlamp. A light distribution generation hood that covers the lower half of the halogen bulb with an infrared reflection film is integrally provided in a socket attached to the bottom of the light distribution generation hood, and a spring and a cylindrical negative electrode provided on the tip side of the light distribution generation hood. The halogen bulb with an infrared reflecting film is held by bringing one of the metal caps into contact with a terminal and pressing the other metal cap to the cylindrical positive electrode terminal provided in the socket. Headlights for vehicles By subjecting, it is intended to solve the conventional problems described above.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. A reference numeral 1 in FIG. 1 is a halogen light bulb 1 with an infrared reflection film according to the present invention (hereinafter abbreviated as light bulb 1), and a bulb 2 of this light bulb 1 is formed in a substantially elliptical shape and has a filament 3 The double end type is composed of a light emitting portion 2a which is housed and has an infrared reflecting film 4 formed on the outer surface thereof, and sealing portions 2b which are provided at both ends of the light emitting portion 2a and lead out wires 5 are drawn out. This is similar to the conventional example.

However, according to the present invention, each sealing portion 2b is covered with a metal cap 6 formed in a cap shape by a metal member, and the sealing portion 2b is covered by the metal cap 6.
It is supposed that the conventional problem is solved by preventing the glare light caused by the above and increasing the mechanical strength of the electric bulb 1.

The metal base 6 will be described in more detail. The metal base 6 is a metal member having excellent conductivity and is formed into a hollow cylindrical shape having a bottom 6a. A through hole 6b is provided, and when the sealing portion 2b is attached, the introduction wire 5 is provided in the through hole 6b.
The metal base 5 also serves as a power source terminal of the light bulb 1 by welding the metal base 6 and the lead-in wire 5 at the time when the deposition is completed.

When the metal base 6 is applied to the sealing portion 2b, the adhesive 7 is filled between the two, and the bottom portion 6a of the metal base 6 and the filament are heated by a heating process or the like. 3 is fixed as a predetermined dimension, and when it is attached to, for example, a headlamp, it is assumed that a predetermined positional relationship can be easily obtained between the reflecting mirror and the filament 3 by attaching the bottom portion 6a as a reference. There is.

Next, the structure when the light bulb 1 having the above structure is attached to the vehicle headlamp 10 will be described with reference to FIGS. First, the reflector 1 of the vehicle headlamp 10
On the bottom of 1, socket receiver 11 such as bayonet type
a is provided, and the socket 12 is provided in the socket receiver 11a.
It is similar to the conventional example in that the bulb 1 can be attached and detached by attaching and detaching.

However, in the present invention, as shown in FIG. 2, the light distribution generating hood 13 is integrally provided in the socket 12, whereby the filament 3 is formed.
It is practically impossible to install a light distribution generation hood for the same purpose on the inner surface of the bulb 2 so as to cover the lower half part of the bulb 2, and it is difficult to generate the light distribution characteristic for the low beam. It deals with the light bulb 1 in which the double end type bulb 2 is adopted.

Therefore, the light distribution generating hood 13 is formed in a substantially semi-cylindrical shape so as to shield the light emitted from the filament 3 directed downward.
At this time, the metal member is formed in consideration of heat resistance and the like. Since the means for blocking the lower half of the light from the filament 3 and generating the light distribution characteristic for the low beam as described above is already known, a detailed description thereof will be omitted. At this time, the reflection mirror 11 may be provided with a known light shielding hood 14 that shields the direct light from the light bulb 1.

At the same time, in the present invention, as shown in FIG. 3, the light distribution generating hood 13 is utilized to also serve as power supply to the light bulb 1. To achieve this object, the light distribution generating hood is used. A cover 13a is rotatably attached to the tip end side of 13 by, for example, a shaft support.
On the inner surface of a, for example, a coiled spring 13b and a cylindrical negative electrode terminal 13c having a bottomed cylindrical shape, which is slidable with the outer diameter of the cover 13a and into which the base 6 can be inserted, are attached. And the cylindrical negative electrode terminal 13c covers the cover 13a.
Inside, it is pushed out toward the socket 12 side by the biasing force of the spring 13b.

Further, a cylindrical positive electrode terminal 12a having substantially the same shape as the cylindrical negative electrode terminal 13c is attached to the socket 12 so as to face it. Therefore, as shown in FIG. 4, the cover 13a is appropriately turned upward. In this state, one base 6 of the light bulb 1 is inserted into the cylindrical negative electrode terminal 13c to compress the spring 13b against the biasing force, and in this state, the cover 13a is rotated to connect the other base 6 to the other base 6. If the cylindrical positive electrode terminal 12a is aligned with the cylindrical positive electrode terminal 12a, the light bulb 1 is held.

Therefore, if the socket 12 is mounted on the socket receiver 11a provided on the reflecting mirror 11 with the light bulb 1 mounted on the socket 12 as described above, the light bulb 1 is positioned at the correct position on the headlight 10. If the cylindrical positive electrode terminal 12a of the socket 12 is connected to the positive electrode of the automobile power source and the light distribution generation hood 13 is also connected to the negative electrode, the light bulb 1 can be lit. It will be

Next, the operation and effect of the present invention having the above-mentioned structure will be described. First, the sealing portion 2a of the light bulb 1 will be described.
Since the metal base 6 is attached to the above, glare light generated from the sealing portion 2b is prevented and the mechanical strength of the electric bulb 1 is improved.

Further, the light distribution generating hood 1 is attached to the socket 12.
3 is integrally provided, which facilitates the generation of the passing boom light distribution even in this type of light bulb 1 in which it is difficult to provide a light distribution generation hood in the bulb 2. By making the light distribution generation hood 13 also serve as power supply, it is possible to simplify the structure around the light bulb 1 and improve the strength and reduce the glare light by eliminating the need for an outer lead that causes glare light generation. is there. Although this embodiment has been described with reference to the example of the vehicle headlamp 10, this is not limited to the vehicle headlamp 10, and may be adopted in, for example, a fog lamp.

[0018]

As described above, according to the present invention, a bottomed cylindrical metal base is attached to the sealing portion of the halogen bulb with an infrared reflecting film, and the bottom portion of the reflecting mirror of the vehicle headlamp. The socket attached to is integrally provided with a light distribution generation hood that covers the lower half of the halogen bulb with an infrared reflection film, and the light distribution generation hood also serves as the wiring on the negative electrode side. The metal base attached to the sealing portion of the halogen bulb with an infrared reflection film prevents glare light caused by the configuration of the halogen bulb with an infrared reflection film.

Further, since the halogen bulb with an infrared reflecting film having the above-mentioned structure is inserted into a socket integrally provided with a light distribution generation hood, it is usually difficult to use this kind of bulb. It is possible to easily generate the light distribution characteristics for the passing beam, and further, by using the light distribution generation hood as a power supply line for a light bulb, the outer leads that have been used conventionally are unnecessary. In addition, the structure around the light bulb is simplified, and therefore, an extremely excellent effect is obtained in improving the performance and reliability of this type of vehicle headlamp.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a halogen bulb with an infrared reflecting film, which is a main part, of an embodiment of a vehicle headlamp according to the present invention.

FIG. 2 is a perspective view showing an embodiment of a vehicle headlamp according to the present invention.

FIG. 3 is a sectional view showing a main part of the same embodiment.

FIG. 4 is an explanatory diagram showing a procedure for inserting and inserting a light bulb.

FIG. 5 is an explanatory diagram showing a conventional halogen light bulb with an infrared reflection film.

FIG. 6 is a cross-sectional view showing a configuration of a conventional vehicle headlamp.

[Explanation of symbols]

 1 ... Halogen bulb with infrared reflection film 2 ... Bulb 2a ... Light emitting part 2b ... Sealing part 3 ... Filament 4 ... Infrared reflection film 5 ... Introduction line 6 ... Metal base 6a ... Bottom part 6b ... … Through hole 6c …… Antireflection treatment 7 …… Adhesive 10 …… Headlight 11 …… Reflector 11a …… Socket receiver 12 …… Socket 12a …… Cylindrical positive electrode terminal 13 …… Light distribution generation hood 13a ...... Cover 13b ...... Spring 13c ...... Cylindrical negative terminal 14 ...... Shade hood

Claims (1)

[Claims] 1. A vehicle headlamp comprising a double-ended type halogen bulb with an infrared reflection film, wherein a sealing portion is formed at both ends of a light emitting portion, as a light source. A cylindrical metal cap with a bottom is attached to the sealing portion, and a socket attached to the bottom of the reflecting mirror of the vehicle headlamp has a light distribution that covers the lower half of the halogen bulb with an infrared reflecting film. A production hood is provided integrally,
By contacting one of the metal caps with the spring and the cylindrical negative electrode terminal provided on the tip side of the light distribution generating hood, the other positive metal terminal is pressed against the cylindrical positive electrode terminal provided with the socket. A headlight for a vehicle, characterized in that the halogen light bulb with an infrared reflection film is held.