JPH0711754U - Automotive lighting bulb - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] When the vehicle is traveling at night, the light of the oncoming vehicle is reduced when passing by the oncoming vehicle to reduce driver glare as much as possible and to reduce low beam and high beam. Even when switching, without impairing the driver's vision,
It also extends the life of the lamp bulb itself. [Configuration] At least two parallel to the center line of the glass tube 2.
On the metal rod of the book, the sub-filament 4
Also, in the light source bulb main body for a lamp in which both ends of the main filament 3 are fixed and the light-shielding means 6 is provided at the tip of the glass tube, the power consumption of each filament is made substantially the same.

Description

[Detailed description of the device] [Field of this device]

 The present invention relates to a lamp bulb for an automobile using optical characteristics.

[0002]

[Background of the invention]

 Recently, when a vehicle travels at night and passes by an oncoming vehicle, the light of the oncoming vehicle illuminates and the driver is dazzled, resulting in unexpected accidents.

For this reason, a bulb for automobiles, which is usually called [H4 type], has a main filament (running beam filament) and a sub-main filament (passing beam main filament) provided in a glass tube. When driving at night, the main filament is turned on to irradiate the traveling beam far away, and when passing by an oncoming vehicle, the submain filament is turned on to emit a passing beam that does not give glare to the oncoming vehicle. However, the driver's glare has not been removed yet.

[0006] Thus, the inventor of the present invention first tried to reduce the irradiation of the light of the oncoming vehicle at the time of passing by the oncoming vehicle while driving the vehicle at night so as to remove the glare of the driver as much as possible. Providing automotive lighting bulbs (1990 utility model registration application No. 86792) has been highly acclaimed. This plan is a further improvement of this.

[0005]

[Disadvantages of conventional devices]

 That is, in the conventional device of this type, as described above, the main filament (usually called a high beam) side irradiates a distance, and the sub-main filament (usually called a low beam) is relatively close. In order to irradiate each of them, the high beam had a higher wattage than the low beam, such as 80 to 70 watts or 110 to 85 watts.

[0006] However, especially when driving in a city, the high beam side is used less than the low beam, and there is a difference in the wattage when switching from the low beam to the high beam, for example. Therefore, extreme light is given to the driver's eyesight, which causes the driver's eyestrain.

Further, a halogen gas is injected into the lamp bulb so that an appropriate halogen cycle is performed, but the concentration of this gas is usually different in wattage. Therefore, if there is a difference in the wattage as described above, the halogen gas concentration should be adjusted to either the high beam side or the low beam side, or the wattage intermediate between them should be used. Therefore, there is a drawback that the life of either the low beam side or the high beam side is shortened.

To describe this point in more detail, a halogen lamp is a lamp bulb in which a gas containing iodine is generally enclosed, so that tungsten evaporated due to a high temperature does not adhere to the inside of the glass, and a tungsten iodide is used. As a result, the gas is present in the tube as a gas, and when the temperature drops after extinguishing, it adheres to the original tungsten filament and so-called blunting of the filament can be prevented.

However, if there are two kinds of filaments with different temperatures in one tube, the amount of evaporation from the higher temperature increases, and after turning off, it returns to the filaments evenly, resulting in high temperature. The other filament, that is, the filament for the high beam, is easily broken.

[0010]

[Purpose of this plan]

 Thus, the present proposal softens the illumination of the light of the oncoming vehicle at the time of passing by the oncoming vehicle while driving at night and eliminates the driver glare as much as possible and operates even when switching the low beam or high beam. This is to make it possible to extend the life of the lamp bulb itself without imposing a burden on the eyes of the person.

[0011]

[Characteristics and effects of the present invention] The automotive lamp bulb of the present invention is such that both ends of the sub-filament and the main filament are fixed in an up-and-down relationship to at least two metal rods parallel to the center line of the glass bulb. A light source bulb main body for a lighting device, wherein a light-shielding means is provided at a tip portion of the glass tube, characterized in that the power consumptions of the respective filaments are substantially the same.

When traveling at night, the main filament (high beam) is turned on for irradiation sufficient for confirming the distant place. On the other hand, the sub-main filament (low beam) is turned on when passing by an oncoming vehicle, but since there is no difference in the wattages of the sub-filament and the main filament in this plan, there is no difference even when switching between them. The driver's eyestrain could be reduced because the driver's vision was not affected by such changes in light. As a result, the illumination of the light of the oncoming vehicle at the time of passing by the oncoming vehicle while driving at night was softened, and the driver's glare was relatively removed.

Further, since the lamp bulb of the present invention has no difference in wattage between the sub-filament and the main filament, the halogen gas concentration injected into the lamp can be made constant according to this wattage. It was possible to extend their life by a stable halogen cycle.

[0014]

[Explanation of Examples]

 The illustrated bulb (1) is called [H4 type] and has a main filament [running beam filament] (3) and a sub-main filament [distant beam main filament] (4) in a glass tube (2). The main main filament (3) is arranged rearward and the sub-main filament (4) is arranged frontward in parallel to the optical axis [bulb axis], and a shield plate is arranged below the sub-main filament (4). (5) is arranged and a light-impermeable shielding film (6) such as coating is provided on the front end of the glass tube (1), and the base (7) is attached to the rear end of the glass tube (2). There is.

In this case, it is important that the main main filament (3) and the sub-main filament (4) have the same wattage, such as 70, 80, 85, 110. It is preferable to coat the glass bulb (2) in the portion corresponding to the sub-filament (4) with the multilayer film (8) having an emission color of yellow.

Therefore, when traveling at night, the main main filament (3) is turned on to irradiate the traveling beam for irradiation sufficient to confirm a distant place. On the other hand, the sub-main filament (4) is turned on when passing away from an oncoming vehicle, but at this time there is no difference in the wattages of the sub-filament (4) and the main filament (3). Even when switching, the driver's eyestrain could be reduced because the driver's vision was not affected by a sudden change in light.

Further, since there is no difference in the wattage, the concentration of the halogen gas injected into the wattage can be made constant corresponding to the wattage, so that the lifespan of them can be extended. Of.

The irradiation beam of the lamp bulb passes through the multilayer film (8) coated on the glass tube (2) in the portion corresponding to the sub-filament (4), which causes yellow light emission. As a result, the illumination of the lights of the oncoming vehicle at the time of passing by the oncoming vehicle was softened, and the glare of the driver could be relatively eliminated.

[Brief description of drawings]

FIG. 1 is a perspective view of the entire valve.

FIG. 2 is an explanatory cross-sectional view of a glass tube bulb coated with a multilayer film.

[Explanation of symbols]

 1, ‥ ‥ Bulb 2, ‥ ‥ ‥ Glass tube 3, ‥ ‥ ‥ Main filament, 4, ‥ ‥ Sub-main filament 5, ‥ ‥ Shield plate 6, ‥ Shield film 7, ‥ ‥ 8. Multilayer film

Claims (1)

[Scope of utility model registration request] 1. At least two parallel to the center line of the glass tube.
In a light source bulb main body for a lamp, in which both ends of a sub-filament and a main filament are fixed to a metal rod of a book in an up-and-down relationship, and a light-shielding means is provided at a tip portion of the glass bulb, Vehicle lighting bulb characterized in that the power consumption is almost the same