JP2978747B2 - Halogen bulbs for headlights - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a halogen bulb called H4 type used as a light source of a headlight of an automobile, and more specifically, notifies an oncoming vehicle of the existence of the own vehicle at dawn or the like. The present invention relates to a halogen lamp having a configuration in which a filament for a position to be lit is built in.

[0002]

2. Description of the Related Art Conventionally, in a halogen lamp provided with a filament having a relatively high power (for example, 60 W) such as for a headlight, a filament having a relatively low power (for example, 5 W) for a position in the same bulb. Is provided, the filament on the low power side is prematurely disconnected due to the halogen attack accompanying the lighting and extinguishing of the filament on the high power side, and it is impossible to provide the filament at the same time.

Therefore, conventionally, when a position function has been required for this type of headlight, for example, a small hole is provided in a part of the reflecting mirror, and a light bulb for a position different from the headlight light source is inserted through the small hole into the lamp. It is formed as a configuration that can be inserted into the device.

[0004]

However, in the above-mentioned conventional structure, for example, when a small hole is provided in the reflector, a corresponding waterproof structure is required so that water does not enter the lamp from the small hole. In addition, the structure of the headlight becomes complicated, and the cost is increased, for example, a socket structure is required in preparation for replacement when the position bulb is disconnected, and further, a small hole is provided in the reflecting mirror. As a result, there is a concern that the light distribution performance may be deteriorated, and solving these points has been an issue.

[0005]

According to the present invention, as a specific means for solving the above-mentioned conventional problems, a traveling lead, a passing lead and a common lead are introduced into a valve. In a halogen lamp for a headlight in which a running filament is provided between the common leads and a passing filament is provided between the passing lead and the common lead, a position lead is introduced into the bulb. A position filament is provided between the position lead and the common lead, and the amount of halogen enclosed in the bulb is 6.13.
Solves the problem by providing a halogen lamp headlight, characterized in that you have a ^{× 10 -9 mol / ml~9.20 × 10} -9 mol / ml ( room temperature).

[0006]

Next, the present invention will be described in detail based on an embodiment shown in the drawings. 1 shows a halogen lamp for a headlight according to the present invention (hereinafter abbreviated as a halogen lamp 1).
A traveling lead 31, a passing lead 32 and a common lead 33 are introduced from the outside into the valve 2 of the above, and a traveling filament 4 is erected between the traveling lead 31 and the common lead 33, The passing filament 6 is interposed between the passing lead 32 and the common lead 33 via the hood 5 attached to the common lead 33.
Is similar to a conventional H4 type halogen bulb.

In the present invention, in addition to the above configuration, a position lead 7 is introduced into the valve.
A position filament 8 is provided between the position lead 7 and the common lead 33. still,
When the positioning filament 8 is erected, the positioning filament 8 may be connected to the common lead 33 via the hood 5 similarly to the passing filament 6.
The position at which it is provided is arbitrary.

A description will now be given of the leading portions of the traveling lead 31, the passing lead 32, the common lead 33, and the position lead 7, which are drawn out of the valve 2. Lead 32,
Since the terminal shapes, arrangements, and the like of the lead portions 31a, 32a, and 33a of the common lead 33 are standardized,
It is assumed that the same shape and the same arrangement as a conventional halogen lamp of this type are used to maintain compatibility.

However, the position lead 7
For example, the shape of the lead wire 7a to which a connector (bake jewel) 7b is attached may be different from the shape of the lead wire 7a, so that the lead wires 31a to 33a can be easily distinguished from the conventional drawers 31a to 33a, and erroneous connection does not occur. It is preferable to keep it.

FIG. 2 shows another embodiment for preventing erroneous connection. In this embodiment, the lead portion 7c of the position lead 7 is formed as a terminal, and is shown in FIG. As shown by an arrow Z, the base portion of the halogen lamp 1 is viewed from the back.

At this time, the lead portions 31a to 33a defined for the traveling lead 31, the passing lead 32, and the common lead 33 have different shapes.
For example, it is assumed that the width W is wider than the terminal specified above, and the standardized light bulb socket is used to avoid erroneous connection by means such as disabling insertion including the position lead 7c. In short, any means may be used as long as erroneous connection to the position lead 7 is not performed.

According to the present invention, in addition to the above-described structure, the amount of halogen sealed in the bulb 2 is limited, and the amount of halogen is 6.13 × 10 ⁻⁹ mol / ml to 9.20 ×.
^10-9 is in the range of mol / ml (room temperature), the relatively traveling filament 6 filament 4 and passing a large electric power as described above, identical to the position filament 8 is a low-power relatively This prevents the positioning filament 8, which is on the low power side, from being disconnected prematurely when sealed in the valve 2.

Here, the results of trial production and experiments by the inventor for realizing the present invention will be described. When the above-mentioned halogen content is set to 6.13 × 10 ⁻⁹ mol / ml or less (normal temperature),
The so-called halogen cycle does not efficiently collect the evaporated filaments, and the bulb 2 becomes remarkably blackened. As a result, the life of the traveling filament 4 and the passing filament 6 is shortened, that is, the life of the halogen lamp 1 as a whole is shortened. It will be noticeable.

The above halogen content is 9.20 × 10
^{When it was -9} mol / ml (normal temperature) or more, it was confirmed that a halogen attack was caused, and the tendency of the positioning filament 8 to be prematurely broken was remarkable. Therefore, the above halogen content, that is, 6.13 × 10 ⁻⁹ mol / ml to 9.2.
0 × 10 ^-9 mol / ml (room temperature), 150 ~
Only when the range of 250 ppm / atm is limited, the filament of high power and the filament of low power in the halogen bulb 1 are provided in one bulb 2.

In actual practice, the positioning filament 8, which has low power, has a high resistance value, a small wire diameter, and a long overall wire length. The size of the filament 4 and the passing filament 6 may be larger than that of the passing filament 6, which may hinder installation.

In such a case, it is possible to reduce the size by making the positioning filament 8 a so-called double coil, which is once coiled and then coiled again. The position of the running filament 4 and the passing filament 6 can be attached without causing interference or the like, and the downsizing of the traveling filament 4 and the passing filament 6 improves the degree of freedom of the attachment position of the positioning filament 8 in the valve 2. .

[0017]

As described above, according to the present invention, a position lead is introduced into a valve, a position filament is erected between the position lead and the common lead, and sealed in the valve. the halogen content ^{6.13 × 10 -9 mol / ml~9.20 ×} 10 -9 mol / ml
By adopting a halogen lamp for headlights as (normal temperature), the positioning filament can be installed in the bulb of the H4 type halogen lamp, which has been impossible in the past, without causing a risk of early disconnection or the like. The structure of the headlight, such as providing a small hole in a part of the mirror and separately mounting a position light bulb, does not make the structure of the headlight extremely effective in reducing costs.

Further, the elimination of the need for a mechanism for providing a position function, such as a small hole in the above-mentioned reflecting mirror, means that the provision of these mechanisms has an adverse effect on the light distribution characteristics or a reduction in waterproof performance. This can be avoided, and the headlight of this type also has an excellent effect in improving the performance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a halogen lamp for a headlight according to the present invention in a partially broken state.

FIG. 2 is an explanatory view showing a main part of another embodiment of the halogen lamp for a headlight according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Halogen bulb for headlight 2 ... Bulb 31 ... Traveling lead 31a ... Lead-out part of traveling lead 32 ... Passing lead 32a ... Leading part of passing lead 33 ... Common lead 33a ... ... Leader for common lead 4. Filament for traveling 5... Hood 5 6. Filament for passing 7... Lead for position 7 a... Lead wire 7 b. ...... Position filament

Continuation of the front page (56) References JP-A-7-29551 (JP, A) JP-A-3-219548 (JP, A) Japanese Utility Model Application Sho 57-195756 (JP, U) (58) Fields investigated (Int) .Cl. ⁶ , DB name) H01K 9/08 H01K 1/40 H01K 1/50

Claims (3)

(57) [Claims] A traveling lead, a passing lead, and a common lead are introduced into a valve, and a traveling filament is provided between the traveling lead and the common lead, and a traveling filament is provided between the passing lead and the common lead. In a halogen lamp for a headlight in which a passing filament is provided, a positioning lead is introduced into the bulb, and a positioning filament is provided between the positioning lead and the common lead, and the positioning filament is provided in the bulb. From 6.13 × 10 ⁻⁹ mol / ml to 9.20
A halogen bulb for headlights, characterized in that the ^{concentration is} × 10 ⁻⁹ mol / ml (normal temperature). 2. The halogen lamp for a headlight according to claim 1, wherein the position filament is a double coil. 3. The lead portion of the position lead extending out of the valve has a different shape from the lead portion of the other lead extending out of the valve. A halogen bulb for a headlight as described.