JPH06176741A - Halogen lamp with infrared ray reflecting film - Google Patents

Abstract

PURPOSE:To solve the problem that the glare light is generated in a seal part to lower the performance in a halogen lamp with infrared ray reflecting film in the case where a halogen lamp having a double-end type bulb, which has seal parts in both ends of a light emitting part, is used as a light source of a lighting fixture for vehicle. CONSTITUTION:In a halogen lamp with infrared ray reflecting film 1, a cap-like metal base 6 connected to a lead-in wire 5 is fitted to each seal part 2b. A beam reflected by the surface of the seal part 2b and a beam transmitted inside of the seal part 2b for emission are thereby eliminated, and the generation of glare light at the time of forming a lighting fixture for vehicle such as a head lamp is prevented 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 halogen light bulb in which a halide is enclosed for the purpose of improving luminous efficiency. More specifically, an infrared reflecting film is formed on the bulb surface for the purpose of further improving the efficiency. It also relates to halogen bulbs.

[0002]

2. Description of the Related Art FIG. 2 shows an example of the structure of a conventional halogen bulb 90 with an infrared reflecting 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 conventional halogen bulb 90 with an infrared reflecting film is used as a light source of an illuminating lamp 80 such as an automobile headlight or a fog lamp, as shown in FIG. 3, the light emitting portion is used. 91
Since the sealing portion 91b is located before and after a, glare light is increased by reflected light or transmitted light at this portion, which makes it difficult to obtain light distribution characteristics that satisfy the standard. Since the sealing portion 91b is provided in the above, the halogen bulb with an infrared reflecting film 90 has a long total length, which causes problems such as insufficient mechanical strength against vibration and shock during traveling, and it is necessary to solve these problems. It was supposed to be.

[0005]

The present invention is, as a concrete means for solving the above-mentioned conventional problems, a double-ended structure in which a sealing portion having a lead-in wire is provided at both ends of a pipe-shaped glass tube. In a halogen bulb with an infrared reflection film as a mold, the halogen bulb with an infrared reflection film characterized in that a cap-shaped metal base connected to the introduction line is attached to each of the sealing portions. By providing it, the said conventional subject is solved.

[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 metal base 6 and the metal base 6 and the bottom portion 6 of the base 6 is heated by a heating process or the like.
When the distance between a and the filament 3 is fixed as a prescribed dimension, and is attached to, for example, a headlamp, a predetermined positional relationship can be easily obtained between the reflecting mirror and the filament 3 by attaching the bottom portion 5a as a reference. It is said that.

On the outer surface of the metal base 6,
For example, the antireflection treatment 6c is applied by an appropriate means such as black plating or black coating with a heat resistant paint, and the reflection when the light emitted from the light emitting portion 2a comes into contact can be reduced. Has been done. The antireflection treatment 6c can be omitted if it is covered with a socket or the like when it is attached to a lamp, and may be performed as necessary.

Next, the electric bulb 1 of the present invention having the above structure.
The operation and effect of the above will be described. First, the sealing portion 2b is opaque and the outer surface is provided with an antireflection treatment 6c.
Since the metal base 6 having been applied is applied, the light emitted from the light emitting portion 2a is reflected on the surface of the sealing portion 2b, and the sealing portion 2b that is transparent from the light emitting portion 2a. This eliminates any of the transmitted light that is directly incident on and radiated, and reduces the generation of glare light.

Secondly, since the sealing portion 2b is covered with the metal base 6 and both are fixed with the adhesive 7, the portion of the sealing portion 2b is reinforced in terms of strength. ,
As a result, the mechanical strength against vibrations and impacts caused by the traveling of the automobile when used as a light source of a vehicle lamp, for example, is improved.

[0013]

As described above, according to the present invention, a halogen bulb with an infrared reflection film, in which a cap-shaped metal base connected to an introduction line is attached to each sealing portion, Firstly, the light rays reflected on the surface of the sealing portion and the light rays transmitted and radiated through the sealing portion are eliminated to prevent generation of glare light when forming an illumination lamp for a vehicle such as a headlight. Therefore, the present invention has an extremely excellent effect in improving the performance of a vehicle lighting device that uses a halogen bulb with an infrared reflection film of this type as a light source.

Secondly, by coating the sealing portion with a metal base, for example, the sealing portion, which is apt to be broken or chipped, is reinforced to improve the mechanical strength. It also has an excellent effect in improving the reliability of a vehicle lighting device that uses a halogen bulb with an infrared reflecting film as a light source.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a halogen bulb with an infrared reflection film according to the present invention.

FIG. 2 is a cross-sectional view showing a conventional halogen light bulb with an infrared reflection film.

FIG. 3 is a cross-sectional view showing a configuration of a vehicle lighting device that employs a conventional halogen bulb with an infrared reflection film as a light source.

[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

Claims (1)

[Claims] 1. A halogen bulb with an infrared-reflecting film, which is a double-ended type in which a sealing part is provided at both ends of a pipe-shaped glass tube to draw out the introducing line, and each of the sealing parts has the introducing line. A halogen bulb with an infrared reflecting film, characterized in that a cap-shaped metal base connected to is attached.