JP4786455B2 - Arrangement structure of halogen bulb for vehicles - Google Patents

Description

  The present invention relates to an arrangement structure of a halogen bulb for a vehicle.

  Halogen bulbs are used as vehicle headlamps. The halogen bulb includes a glass tube filled with a halogen gas, a filament made of tungsten or the like located on the central axis of the glass tube, and a stem that is arranged in parallel above the filament and supports the filament. When the filament is energized through this stem, the filament emits light.

The filament generates heat with light emission. As a result, tungsten atoms are evaporated from the filament and combined with halogen gas in the vicinity of the inner surface of the glass tube to produce tungsten halide. This tungsten halide is convected inside the glass tube and separated into tungsten and halogen near the filament. The separated tungsten is redeposited on the filament. When the halogen bulb is normally turned on, such a halogen cycle is performed.
Japanese Patent Application Laid-Open No. 7-296783

By the way, in countries with high latitudes such as North America and Northern Europe, the daylight running light (DRL) is running even in the daytime due to low sunlight amount and weather problems such as fog. As this DRL, a halogen bulb for the HI beam is lit at a low voltage. However, when the halogen bulb is lit at a low voltage, the temperature rise on the inner surface of the glass tube is reduced. Therefore, the bonding rate between tungsten and halogen is reduced, and the halogen is likely to adhere to the inner surface of the glass tube. Thereby, there exists a problem that the teaification level of the inner surface of a glass tube deteriorates (for example, refer patent document 1).
Then, this invention makes it a subject to provide the arrangement | positioning structure of the halogen bulb for vehicles which can suppress the browning of the inner surface of a glass tube.

In order to solve the above-mentioned problem, the invention according to claim 1 includes a filament (for example, the filament 14 in the embodiment) located on the central axis of a glass tube (for example, the glass tube 12 in the embodiment), and an upper portion of the filament. And a stem (for example, the stem 16 in the embodiment) that is provided in parallel with the filament, and is used for a vehicle headlamp that includes the glass tube in which the filament and the stem are sealed together with a halogen gas. Arrangement of the halogen bulb (for example, the halogen bulb 10 in the embodiment), the dimming control of the halogen bulb is possible at the first voltage and the second voltage that is lower than the first voltage. And is used by switching between the first voltage and the second voltage, and the halogen bulb In the surface, with respect to the circumferential direction of the center of the filament and the and the filament stem the vehicle, an angle which is not located on the same line (e.g., the angle θ in the embodiment) is attached at an, the halogen bulb is the vehicle Each of the halogen bulbs is provided at an angle with respect to the filament so that the stem is located on the left side and the right side of the front side, and the stem is positioned in the vehicle outward direction with respect to the filament. A box-shaped coupler (for example, the coupler 20 in the embodiment) that opens in a direction orthogonal to the central axis is provided at the end, and the headlamp on the left side of the vehicle is provided on the back of the headlamp. The halogen bulb is placed on the engagement member (for example, the engagement member 40 in the embodiment) with the coupler facing downward. Next, the halogen bulb is fixed by rotating the halogen bulb counterclockwise, and in the headlamp on the right side of the vehicle, the coupler is attached to the engaging member provided on the back of the headlamp. The halogen bulb is fixed by rotating the halogen bulb counterclockwise by inserting the halogen bulb in a state of facing left .

  The invention according to claim 2 is characterized in that the dimming control is a PWM system.

The invention according to claim 3 includes a filament positioned on the central axis of the glass tube, and a stem that is provided in parallel above the filament and supports the filament, and the filament and the stem together with the halogen gas. An arrangement structure of a halogen bulb for a vehicle composed of the enclosed glass tube, wherein the halogen bulb is a vehicle lamp that is turned on or off in response to a change in a vehicle traveling direction or an operation of a predetermined switch. In the cross section, the filament and the stem are attached at an angle not collinear with the vertical direction of the vehicle with the filament as a center, and the halogen bulbs are provided on the left and right sides in front of the vehicle. At the same time, the stem is positioned more outward than the filament. In addition, each of the halogen bulbs is attached at an angle with respect to the filament, and a box-shaped coupler that opens in a direction orthogonal to the central axis is provided at a rear end portion of the halogen bulb. In the lamp on the left side, the halogen bulb is inserted into an engagement member provided on the back of the lamp with the coupler facing downward, and then the halogen bulb is rotated counterclockwise to A halogen bulb is fixed, and in the lamp on the right side of the vehicle, the halogen bulb is inserted into an engagement member provided on the back of the lamp with the coupler facing left, and then the halogen bulb is turned counterclockwise. And the halogen bulb is fixed .

The invention according to claim 4 is characterized in that the angle between the filament and the stem is attached at an angle of 30 degrees or more in the vehicle outward direction from the state where the stem is located directly above the filament. .

According to the first aspect of the present invention, since the stem does not exist above the filament, the evaporated filament material rises toward the ceiling surface of the glass tube without being obstructed by the stem. And since the light of a filament is irradiated to the ceiling surface of a glass tube without being obstructed by a stem, the temperature of a ceiling surface rises also at the time of light reduction control. Thereby, the coupling | bonding of halogen gas and filament material is accelerated | stimulated in the ceiling surface vicinity of a glass tube, and a halogen cycle functions normally. Therefore, it becomes possible to prevent the halogen substance from adhering to the inner surface of the glass tube and to suppress browning of the inner surface of the glass tube.
In addition, it is possible to interpose a stem between a pedestrian or the like existing outside the vehicle and a filament in the halogen bulb on the pedestrian side. Thereby, since the light distribution of the filament with respect to the pedestrian etc. is weakened, the dazzling with respect to a pedestrian etc. can be reduced.

  According to the invention of claim 2, fine dimming control is possible.

According to the invention which concerns on Claim 3, browning of the inner surface of a glass tube can be suppressed also about the halogen bulb which lights or extinguishes according to the change of a vehicle advancing direction.
In addition, it is possible to interpose a stem between a pedestrian or the like existing outside the vehicle and a filament in the halogen bulb on the pedestrian side. Thereby, since the light distribution of the filament with respect to the pedestrian etc. is weakened, the dazzling with respect to a pedestrian etc. can be reduced.

  According to the invention which concerns on Claim 7, browning of the inner surface of a glass tube can be suppressed most effectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Halogen bulb)
FIG. 1 is an explanatory view of a halogen bulb, FIG. 1 (a) is a front view, and FIG. 1 (b) is a side view. As shown in FIG. 1B, the halogen bulb 10 includes a glass tube 12 that encloses a halogen gas, a filament 14 that is positioned on the central axis of the glass tube 12, and a filament that is provided in parallel above the filament 14. 14 is a single-filament bulb having a stem 16 that supports 14.

The halogen bulb 10 has a glass tube 12 that encloses a halogen gas. The glass tube 12 is formed in a cylindrical shape by a glass material having heat resistance. The front end (vehicle front end) of the glass tube 12 is formed in a conical shape, and the rear end (vehicle rear end) is sealed by a sealing member (not shown).
A filament 14 is arranged on the central axis of the glass tube 12. The filament 14 is formed by spirally forming a wire such as tungsten that emits light when energized.

The filament 14 is supported by a stem 16. The stem 16 is formed into a thin rod shape from a metal material or the like, and is arranged in parallel above the filament 14. The tip of the stem 16 (front of the vehicle) is bent downward and connected to the tip of the filament 14. Note that the distal end of the support member 17 is connected to the rear end of the filament 14.
The rear ends of the stem 16 and the support member 17 are fixed to a sealing member at the rear end of the glass tube 12. The filament 16 is supported by the stem 16 and the support member 17 and can be energized.

  The glass tube 12 is fixed to the base member 30. A flange 32 is provided behind the base member 30. A plurality (three in FIG. 1) of claw portions 34 are formed on the outer peripheral edge portion of the flange 32. The claw portion 34 is formed at a constant height from the outer periphery of the flange 32 toward the outside and with a predetermined width along the circumferential direction of the flange 32.

  A connecting member 36 extends downward from the rear end surface of the base member 30, and a box-shaped coupler 20 that opens downward is provided at a lower end portion thereof. A terminal (not shown) that is electrically connected to the stem 16 and the support member 17 is provided on the bottom surface of the concave portion 21 of the coupler 20. By connecting the terminal of the connector 25 to the terminal of the coupler 20, the filament 14 can be energized from the outside. The convex portion 26 of the connector 25 is inserted into the concave portion 21 of the coupler 20, and the O-ring 27 disposed on the outer surface of the convex portion 26 is brought into contact with the inner surface 22 of the concave portion 21. The connection with the terminal is sealed.

The halogen bulb 10 can control the amount of light by controlling the applied voltage. In particular, fine control of the amount of light becomes possible by PWM control of the applied voltage.
By the way, in countries with high latitudes such as North America and Northern Europe, the daylight running light (DRL) is running even in the daytime due to low sunlight amount and weather problems such as fog. As this DRL, a halogen bulb for the HI beam is lit at a low voltage. Specifically, when a predetermined voltage is applied to the halogen bulb at a DUTY ratio of 100%, an HI beam is obtained. However, the same voltage is applied at a DUTY ratio of about 20% to realize DRL. As described above, the halogen bulb 10 is switched between the high voltage for the HI beam and the low voltage for the DRL.

  The halogen bulb 10 described above is mounted on the reflector 2 to form a vehicle headlamp. Specifically, the base member 30 of the halogen bulb 10 is inserted into the central hole 3 of the reflector 2 from the rear of the vehicle. Then, the flange 32 of the base member 30 contacts the rear end of the central hole 3, the claw portion 34 of the flange 32 engages in front of the engaging member 40 of the reflector 2, and the halogen bulb 10 is fixed to the reflector 2. ing.

(First embodiment, arrangement structure of halogen bulb)
FIG. 2 is a front view of the vehicular headlamp, and is an explanatory diagram of the arrangement structure of the vehicular halogen bulb according to the first embodiment. FIG. 2A shows a halogen bulb on the right side of the vehicle, and FIG. 2B shows a halogen bulb on the left side of the vehicle, and the vertical direction in FIG. 2 is the vertical direction of the vehicle. Note that the flange 32, the coupler 20, and the like are indicated by broken lines because they are located behind the reflector. As shown in FIG. 2, the filament 14 and the stem 16 are attached at an angle θ that is not located on the same line with respect to the vertical direction of the vehicle, with the filament 14 as the center.
In other words, the halogen bulb 10 is arranged such that a straight line connecting the stem 16 and the filament 14 is inclined by an angle θ (> 0) with respect to the vertical direction of the vehicle in the front or axially perpendicular section of the halogen bulb. . The range of the angle θ will be described later.

  In the first embodiment, the left and right halogen bulbs 10 are centered on the filament 14 such that the stem 16 is positioned outward of the filament 14 and the stem 16 is positioned above the filament 14 of the vehicle. It is attached at an angle. That is, in the halogen bulb on the right side of the vehicle shown in FIG. 2A, the stem 16 is disposed on the upper right side of the filament 14. In the halogen bulb on the left side of the vehicle shown in FIG. 2B, the stem 16 is disposed on the upper left side of the filament 14.

Thus, since the stem 16 is arranged on the upper outside of the vehicle with respect to the filament 14, the position of the eyes of pedestrians and passengers of oncoming vehicles (referred to as “pedestrians”) existing in the vehicle outward direction. The stem 16 can be interposed between the filament 14 in the halogen bulb on the pedestrian side or the like. Thereby, since the light distribution of the filament 14 with respect to the pedestrian etc. is weakened, the dazzling with respect to a pedestrian etc. can be reduced.
Further, when the stem 16 is disposed above the filament 14 in the vehicle, the opening of the coupler 20 is disposed downward in the vehicle. Thereby, infiltration of rainwater or the like into the opening of the coupler 20 can be suppressed. Furthermore, the ease of maintenance can be improved by tilting the halogen bulb 10 in the left-right symmetric direction.

  FIG. 3 is a rear view of the vehicular headlamp, and is an explanatory view of a method of mounting the halogen bulb. 3 (a) and 3 (b) are the halogen bulbs on the left side of the vehicle, and FIGS. 3 (c) and 3 (d) are the halogen bulbs on the right side of the vehicle. Direction. As shown in FIG. 3A, the above-described reflector engaging member 40 is formed in a disk shape from a stainless material or the like. A through hole 42 into which the flange 32 of the halogen bulb 10 can be inserted is formed at the center of the engaging member 40. Further, a plurality of (three in FIG. 3) notches 44 into which the claw portions 34 of the halogen bulb 10 can be inserted are formed at the inner peripheral edge of the through hole 42.

On the left side of the vehicle shown in FIG. 3A, the halogen bulb 10 is inserted into the engagement member 40 with the coupler 20 facing downward. Next, the halogen bulb 10 is rotated counterclockwise (in the direction of the arrow 38) by an angle θ. Then, as shown in FIG. 3 (b), the claw portion 34 wraps around the engagement member 40 and is engaged with engagement means (not shown) provided on the engagement member 40. Thereby, the stem of the halogen bulb 10 is arranged in the vehicle outward direction from the filament.
On the other hand, on the right side of the vehicle shown in FIG. 3C, the halogen bulb 10 is inserted into the engaging member 40 with the coupler 20 facing left. Next, the halogen bulb 10 is rotated counterclockwise (in the direction of the arrow 38) by an angle θ ′ (= 90 ° −θ). Thereby, as shown in FIG.3 (d), the nail | claw part 34 is engaged behind the engaging member 40, and a stem is arrange | positioned rather than a filament at the vehicle outer side.

  Thus, in this embodiment, since the stem is arranged in the vehicle outward direction from the filament, it is possible to mount the halogen bulb 10 by rotating the coupler 20 inside the vehicle from the filament. Thereby, when the halogen bulb is attached, interference between a lamp (not shown) existing outside the vehicle from the filament and the coupler 20 can be prevented. Further, since the halogen bulbs 10 on both the left and right sides can be rotated and mounted in the same direction, the engagement members 40 on both the left and right sides can be shared.

Next, the action of suppressing teaification of the glass tube in this embodiment will be described.
The inventor of the present application has found that teat of a glass tube can be suppressed by arranging a stem other than above the filament. Teaification of a glass tube is a phenomenon in which halogen adheres to the inner surface of the glass tube. Halogen deposition is suppressed by the normal halogen cycle. In a normal halogen cycle, the filament generates heat as it emits light, and tungsten atoms evaporate from the filament. Evaporated high-temperature tungsten atoms rise inside the glass tube and combine with halogen gas near the ceiling surface to produce tungsten halide. This tungsten halide is convected inside the glass tube and separated into tungsten and halogen near the filament. The separated tungsten is redeposited on the filament. If this halogen cycle is performed normally, the halide hardly adheres to the glass tube wall.

  FIG. 4B is an explanatory diagram of the halogen cycle in the arrangement structure of the halogen bulb according to the prior art. In the prior art, since the stem 16 exists above the filament 14, the rise of evaporated tungsten is hindered. As a result, halogen gas is retained between the stem 16 and the glass tube 12. Moreover, the light from the filament 14 is applied to the stem 16 and a shadow is formed on the ceiling of the glass tube, so that the temperature rise of the glass tube is hindered. This temperature drop of the glass tube becomes particularly remarkable at the time of dimming control. As a result, the halogen gas and tungsten cannot be bonded, and the halogen cycle does not function normally. As a result, halogen adheres to the inner surface of the glass tube 12 and browning proceeds.

  FIG. 4A is an explanatory diagram of a halogen cycle in the arrangement structure of the halogen bulb according to this embodiment. In the present embodiment, since the stem 16 does not exist above the filament 14, the evaporated tungsten rises toward the ceiling surface of the glass tube. And since the light from the filament 14 is irradiated to the ceiling surface of a glass tube, the temperature of a ceiling surface fully rises also at the time of dimming control. Thereby, the coupling | bonding of halogen gas and tungsten is accelerated | stimulated, and a halogen cycle functions normally. Therefore, it becomes possible to prevent the halogen from adhering to the inner surface of the glass tube 12 and to suppress browning.

  FIG. 5 is a graph showing the relationship between the stem angle θ and the browning speed. The stem angle θ is an angle formed by a straight line connecting the stem and the filament with respect to the vertical direction of the vehicle (see FIG. 2). The rate of browning is shown as a percentage (%) with respect to the rate of browning when θ = 0. As shown in FIG. 5, as the angle θ increases from 0, the browning progress rate rapidly decreases. If the angle θ exceeds 30 °, the speed of tea making will be 1/10 or less, and even if the angle θ is increased further, the speed of tea making will hardly decrease. Therefore, it is desirable to set the stem angle θ to 30 ° or more.

  As described in detail above, in the arrangement of the halogen bulb for a vehicle according to the present embodiment, in the cross section of the halogen bulb 10, the filament 14 and the stem 16 are collinear with respect to the vertical direction of the vehicle. It was set as the structure attached by making the angle (theta) which is not located in. According to this configuration, since the stem 16 does not exist above the filament 14, the tungsten of the evaporated filament 14 rises toward the ceiling surface of the glass tube without being obstructed by the stem 16. In addition, since the light emitted from the filament 14 is irradiated to the ceiling surface of the glass tube without being obstructed by the stem 16, the temperature of the ceiling surface is sufficiently increased even during dimming control. Thereby, the coupling | bonding of halogen gas and tungsten is accelerated | stimulated in the ceiling surface vicinity of the glass tube 12, and a halogen cycle functions normally. Therefore, it becomes possible to prevent the halogen from adhering to the inner surface of the glass tube 12 and to suppress browning of the inner surface of the glass tube 12.

  By the way, when the halogen substance adheres to the inner surface of the glass tube 12, since the halogen combined with tungsten of the filament 14 is insufficient at the time of high voltage lighting, the filament 14 burns and becomes thin, and the life is shortened. On the other hand, in this embodiment, since the adhesion of halogen to the glass tube 12 can be prevented, the lifetime reduction of the filament 14 can be suppressed. Moreover, since the browning of the glass tube 12 can be prevented, the brightness of the halogen bulb 10 can be maintained. Furthermore, the hood cover of the halogen bulb for hiding the browning of the glass tube is unnecessary, which can contribute to cost reduction. In addition, since standard halogen bulbs with versatility are used, there is almost no cost increase.

(Second Embodiment)
Next, the arrangement structure of the halogen bulb for vehicles according to the second embodiment of the present invention will be described. FIG. 6 is a front view of the vehicular headlamp, and is an explanatory diagram of an arrangement structure of the vehicular halogen bulb according to the second embodiment. FIG. 6A shows a halogen bulb on the right side of the vehicle, and FIG. 6B shows a halogen bulb on the left side of the vehicle. The vertical direction in FIG. 6 is the vertical direction of the vehicle. In the first embodiment, the stem 16 is disposed in the vehicle outward direction from the filament 14, whereas in the second embodiment, the halogen bulb 10 b on the left side of the vehicle and the halogen bulb 10 a on the right side of the vehicle connect the filament 14. They differ in that they are attached to the center in the same direction (right direction) with an angle θ. Note that detailed description of portions having the same configuration as in the first embodiment is omitted.

  In the halogen bulb 10a on the right side of the vehicle shown in FIG. 6A, a straight line connecting the filament 14 and the stem 16 is attached at an angle θ to the right with respect to the vehicle top-to-bottom direction. In other words, the halogen bulb 10a on the right side of the vehicle is attached in a state of being rotated right by an angle θ around the filament 14. Accordingly, the stem 16 is disposed on the upper right side of the filament 14. Similarly, in the halogen bulb 10b on the left side of the vehicle shown in FIG. 6B, a straight line connecting the filament 14 and the stem 16 is attached at an angle θ to the right with respect to the vehicle vertical direction. That is, the halogen bulb 10b on the right side of the vehicle is attached in a state of being rotated right by an angle θ around the filament 14. Accordingly, the stem 16 is disposed on the upper right side of the filament 14.

  As described above, since the stem 16 is disposed on the upper right side of the vehicle with respect to the filament 14, the position between the eyes of a pedestrian or the like existing in the right direction of the vehicle and the filament 14 in the halogen bulbs 10a and 10b on both sides of the vehicle. In addition, the stem 16 can be interposed. Thereby, since the light distribution of the filament with respect to the pedestrian etc. is weakened, the dazzling with respect to a pedestrian etc. can be reduced.

  Contrary to the above, the halogen bulbs 10 a and 10 b on both sides of the vehicle may be attached with an angle θ leftward about the filament 14. In this case, the stem 16 can be interposed between the position of the eyes of a pedestrian or the like existing in the left direction of the vehicle and the filaments 14 in the halogen bulbs 10a and 10b on both sides of the vehicle. Thereby, since the light distribution of the filament with respect to the pedestrian etc. is weakened, the dazzling with respect to a pedestrian etc. can be reduced.

The present invention is not limited to the embodiment described above.
Halogenation of halogen bulbs occurs not only when driving at low voltage, but also when lighting for a short time. Therefore, it is used not only as a halogen bulb used in a vehicle headlamp that realizes DRL, but also as a vehicle lamp such as a cornering lamp that is turned on or off according to a change in the traveling direction of the vehicle, and a steering angle interlocking lamp The present invention can also be applied to a halogen bulb.

  The cornering lamp is generally disposed at an outer end in the vehicle width direction. With respect to the halogen bulb used in the cornering lamp, it is desirable that the stem is disposed in the vehicle inward direction with respect to the filament. Thereby, since the light distribution with respect to the in-vehicle direction is weakened, the dazzling with respect to the passenger of the vehicle or the like can be reduced.

For the halogen bulb having the arrangement structure of the present invention shown in FIG. 4A and the halogen bulb having the conventional arrangement structure shown in FIG. 4B, the halogen bulb is continuously lit in a dimming controlled state. Temperature and teaification level were measured.
Specifically, a halogen bulb was placed in a thermostat having an atmospheric temperature of 50 ° C., and a voltage of 13.5 V was applied at a DUTY ratio of 18.75% to perform DRL continuous lighting. And the upper surface temperature of the glass tube was measured with the non-contact-type temperature measuring device. The temperature measurement was performed after the halogen bulb was lit for 15 minutes and the upper surface temperature of the glass tube was saturated. The measurement results are shown in Table 1.

  In the arrangement structure of the present invention in which the halogen bulb is inclined by 45 °, the upper surface temperature of the glass tube is increased by about 20 ° C. as compared with the conventional arrangement structure in which the halogen bulb is not inclined. There was almost no difference between left and right by the lamp. The reason for this is that in the conventional arrangement structure, the light from the filament is applied to the stem, and a shadow is formed on the ceiling of the glass tube, and the stem itself functions to absorb the heat from the filament. However, in the arrangement structure of the present invention, since the light from the filament is irradiated to the ceiling surface of the glass tube without being obstructed by the stem, the glass tube is also used during dimming control. This is probably because the temperature of the upper part rises sufficiently.

  Moreover, the browning level of the halogen bulb according to the arrangement structure of the present invention was much better than the browning level of the halogen bulb according to the conventional arrangement structure. In the conventional arrangement structure, since the temperature of the upper part of the glass tube is low, the halogen gas and tungsten cannot be bonded, and the halogen adheres to the inner surface of the glass tube and the browning proceeds. In the structure, the halogen cycle is activated even at low voltage or for a short time, and the bonding between the halogen gas and tungsten is promoted. Therefore, it becomes possible to reduce the adhesion of halogen to the inner surface of the glass tube. This is thought to be because the conversion is suppressed.

It is explanatory drawing of a halogen bulb. It is explanatory drawing of the arrangement structure of the halogen bulb for vehicles which concerns on 1st Embodiment. It is explanatory drawing of the mounting method of a halogen bulb. It is explanatory drawing of a halogen cycle. It is a graph which shows the relationship between a stem angle and browning progress speed. It is explanatory drawing of the arrangement structure of the halogen bulb for vehicles which concerns on 2nd Embodiment.

Explanation of symbols

  10 ... Halogen bulb 12 ... Glass tube 14 ... Filament 16 ... Stem

Claims (4)

A vehicle comprising the glass tube having a filament positioned on the central axis of the glass tube and a stem provided in parallel above the filament to support the filament, the filament and the stem being sealed together with a halogen gas An arrangement structure of a halogen bulb used for a headlight for a vehicle,
The halogen bulb is configured to be capable of dimming control at a first voltage and a second voltage that is lower than the first voltage, and is used by switching between the first voltage and the second voltage. With
In the cross section of the halogen bulb, the filament and the stem are attached at an angle not located on the same line with respect to the vertical direction of the vehicle, with the filament as the center ,
The halogen bulbs are provided on the left and right sides in front of the vehicle, and each of the halogen bulbs is attached at an angle with respect to the filament so that the stem is positioned outward of the filament with respect to the filament. ,
A box-shaped coupler that opens in a direction perpendicular to the central axis is provided at the rear end of the halogen bulb,
In the headlamp on the left side of the vehicle, the halogen bulb is inserted into an engagement member provided on the rear surface of the headlamp with the coupler facing downward, and then the halogen bulb is turned counterclockwise. The halogen bulb is fixed by rotating,
In the headlamp on the right side of the vehicle, the halogen bulb is inserted into an engagement member provided on the back of the headlamp with the coupler facing left, and then the halogen bulb is rotated counterclockwise. An arrangement structure of a halogen bulb for a vehicle, wherein the halogen bulb is fixed by moving .   The arrangement of the halogen bulb for a vehicle according to claim 1, wherein the dimming control is a PWM system. A vehicle comprising the glass tube having a filament positioned on the central axis of the glass tube and a stem provided in parallel above the filament to support the filament, the filament and the stem being sealed together with a halogen gas The arrangement structure of the halogen bulb for
The halogen bulb is a vehicle lamp that is turned on or off in response to a change in the vehicle traveling direction or an operation of a predetermined switch,
In the cross section of the halogen bulb, the filament and the stem are attached at an angle not located on the same line with respect to the vertical direction of the vehicle, with the filament as the center ,
The halogen bulbs are provided on the left and right sides in front of the vehicle, and each of the halogen bulbs is attached at an angle with respect to the filament so that the stem is positioned outward of the filament with respect to the filament. ,
A box-shaped coupler that opens in a direction perpendicular to the central axis is provided at the rear end of the halogen bulb,
In the lamp on the left side of the vehicle, the halogen bulb is inserted into an engagement member provided on the back of the lamp with the coupler facing downward, and then the halogen bulb is rotated counterclockwise. The halogen bulb is fixed,
In the lamp on the right side of the vehicle, the halogen bulb is inserted into an engagement member provided on the back of the lamp with the coupler facing left, and then the halogen bulb is rotated counterclockwise to Arrangement structure of a halogen bulb for vehicles, wherein the halogen bulb is fixed . Angle between the filament and the stem, which of the claims 1 to 3, characterized in that said stem is mounted at an angle of more than 30 degrees from the state located in the vehicle exterior direction immediately above the filament An arrangement structure of a halogen bulb for a vehicle according to claim 1.

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