JPH09180505A - Luminaire for vehicle having discharge bulb - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle luminaire capable of stabilizing the weight of a luminaire body to which a lighting circuit is fixed and decreasing the projecting amount downward in the vehicle luminaire using a discharge bulb as a light source. SOLUTION: A step difference S is formed in the bottom surface of a luminaire body 1 so that the bottom surface 1A of the luminaire body 1 of a lamp part LL having a discharge bulb 5 becomes higher than the bottom surface 1B of a lamp part HL. By fixing a lighting circuit case 16 of the discharge bulb 5 to the bottom surface 1A, the dimension projecting downward of the lighting circuit case 16 in the whole luminaire is decreased, and limitation in body design of an automobile is relaxed. Since a cord connecting the lighting circuit 15 and the discharge bulb 5 is shortened, electromagnetic wave radiation from the cord is suppressed, and influence of EMI on various kinds of on-vehicle electronic devices is decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp suitable for use as a vehicle headlight, and more particularly to a vehicular lamp including a lamp having a discharge bulb as a light source.

[0002]

2. Description of the Related Art In recent years, as a headlight of an automobile, application of a lamp using a discharge bulb as a light source, which has good luminous efficiency and color rendering properties and has a long life, has been studied. However, in this type of lamp, a high voltage is required to generate a discharge in the discharge bulb, and it is necessary to attach a lighting circuit for increasing the vehicle battery voltage to the required high voltage. is there. Therefore, in the conventional lighting circuit, a booster circuit for boosting the voltage required for the discharge bulb, that is, a lighting circuit forming the starter circuit unit is integrally attached to a part of the body of the lamp. The composition is taken.

By the way, when a lamp using such a discharge bulb is constructed as a headlight of an automobile, especially as a passing beam lamp, it is necessary to construct two different lamps with a conventional traveling beam lamp using an incandescent bulb. Occurs, which causes a high cost. Therefore, we are trying to reduce the cost by using a combination structure that integrates these lamps.However, in a lamp with such a combination structure, the dimensions of the reflector and the lamp body are designed regardless of the type of bulb used. For example, in the case of forming a combination lamp in which a lamp having a discharge bulb and a lamp having an incandescent bulb are integrated, it is designed to make the top surface and the bottom surface of each lamp equal in height. Therefore, when the above-mentioned lighting circuit for lighting the discharge bulb is attached to the back surface or the bottom surface of the lamp body, this portion is projected rearward or downward, and the balance of the lamp as a whole is deteriorated.

Particularly, in consideration of the weight balance of the entire lamp, the lighting circuit is attached to the bottom surface of the lamp body. For example, FIG. 7 is a diagram showing the schematic structure thereof.
Lamp LL with discharge bulb 105 and incandescent bulb 1
A lamp having 06 is integrated into a lamp chamber defined by one lamp body 101 and a lens 107, and a case 102 having a lighting circuit for lighting the discharge bulb 105 is installed in the lamp body 101. It is attached to a part of the bottom. Since this lighting circuit is composed of a step-up transformer and other electronic components, the weight of the case 102 becomes relatively large. Therefore, by mounting the lighting circuit case 102 on the bottom surface of the lamp body 101. ,
This is advantageous for stabilizing the weight balance.

[0005]

However, in this case, the lighting circuit case 1 when viewed from the front direction of the lamp.
The whole of 02 is projected downward, and this portion of the lamp body 101 is projected downward, and thereby the total height dimension of the lamp is increased. When mounting such a lamp on a vehicle, it is necessary to perform processing on the vehicle body side of the vehicle so that this part is not exposed to the outside.
This process requires a change in the design of the vehicle body of the automobile, and also restricts the design of the vehicle body, which is not preferable in terms of the degree of freedom in designing the vehicle design and the like.

It is an object of the present invention to make it possible to stabilize the weight of a lamp body to which a lighting circuit is attached and to reduce the amount of downward projection in a vehicle lamp using a discharge bulb as a light source. The present invention is to provide a vehicle lighting device.

[0007]

According to the present invention, the bottom surface of a first lamp having a discharge bulb as a light source is positioned higher than the bottom surface of a second lamp having an incandescent bulb integrated therewith as a light source. A lighting circuit for setting and lighting the discharge bulb is arranged on the bottom surface of the first lamp. As a result, the amount by which the lighting circuit projects below the lamp can be reduced, mounting on a vehicle is facilitated, and the degree of freedom in designing the vehicle body can be improved. For example, in the present invention, the reflector of the first lamp and the reflector of the second lamp are internally provided in one lamp body, and the width dimension of the reflector of the first lamp is larger than that of the reflector of the second lamp. Use a larger configuration. Further, the height dimension of the reflector of the second lamp is made larger than the height dimension of the reflector of the first lamp.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are a partially cutaway front view and a rear view of an embodiment in which the present invention is applied to a four-lamp headlight of an automobile. Further, FIG. 3 is AA of FIG.
A sectional view taken along the line, and FIGS. 4 and 5 are BB of FIG. 1, respectively.
It is sectional drawing which follows the line and CC line. In these figures,
Inside the lamp body 1, there are two juxtaposed rotary parabolas 3
c, 4c as the main body, and the integrated reflector 2 in which the reflectors 3 and 4 each having the lower and upper sides formed as flat portions 3a, 4a and 3b, 4b are connected in series are installed, and are installed in a vehicle. The reflector 3 on the side of the passing beam lamp LL, which is located outside the vehicle body when it is turned on, has a discharge bulb 5, and the reflector 3 on the side of the traveling beam lamp HL, located inside the vehicle body, has a halogen bulb 6.
Are detachably attached.

A lens 7 is attached to the front opening of the lamp body 1, and the lamps LL,
The HL light room is defined. Furthermore, with this lamp,
The lens 7 has a structure in which the lens 7 is retracted backward as it goes downward and is inclined forward, and the length by which the lower flat surface portions 3a, 4a of the respective reflectors 3, 4 are projected forward is made to follow this structure. It is made smaller than the plane portions 3b and 4b. Further, in accordance with this, the lower edge portion 1a of the opening of the lamp body 1
Is slightly retracted rearward with respect to the upper edge 1b.

Further, on the back surface of the lamp body 1 facing these bulbs 5 and 6, there are openings 1 for inserting the bulbs, respectively.
c and 1d are provided, and the valves 5 and 6 can be attached and detached through the openings 1c and 1d. And
Opening 1 of discharge bulb 5 on low beam lamp LL side
A removable back cover 8 is attached to c via a seal ring 9, and a rubber cover 10 is attached to the opening 1d on the side of the traveling beam lamp HL, whereby the openings 1c and 1d are waterproof. It is sealed with. The socket 5a of the discharge bulb 5 of the passing beam lamp LL
A connector 11 is connected to the socket 11. The cap socket 6a of the halogen lamp 6 of the traveling beam lamp HL is projected to the outside of the rubber cover 10 and a connector not shown is connected.

Further, the inner surface of the integral reflector 2 is coated or vapor-deposited with aluminum or the like to form a reflecting surface. Here, the inner surface of the lamp body 1 is also coated or vapor-deposited with aluminum and the inner surface is While being used as a part of the reflecting surface, it is also configured as a shield film for electromagnetically shielding the inside of the lamp body 1. Further, a shield plate 12 made of a metal plate is adhered or screwed to a region surrounding the discharge bulb on the inner surface of the lamp body, while a headlight is attached to the vehicle body of the automobile on the back surface of the lamp body 1. A stud bolt 20 for standing is provided upright.

In the integrated reflector, as shown in FIG. 1, the reflectors 3 of the low beam lamp LL and the reflector 4 of the traveling beam lamp HL are equal in height of their upper flat portions 3b and 4b. Although set, the height of each of the lower plane portions 3a and 4a is set higher in the reflector 3 than in the reflector 4. Therefore, although the vertical dimension of the opening of the reflector 3 on the side of the passing beam lamp LL is smaller than that of the reflector 4 on the side of the traveling beam lamp HL, the width dimension of the reflector 3 in the left-right direction is designed to be larger by that amount. The reflective area and the opening area are ensured.

Further, the height of the bottom surface of the lamp body 1 also follows the difference in the height position of the lower plane portions of the reflectors 3 and 4 from the bottom surface 1A of the portion corresponding to the passing beam lamp. It is set at a position higher than the bottom surface 1B of the portion corresponding to the traveling beam lamp. Therefore,
The bottom surface of the lamp body 1 has a stepped step S at the boundary between the two lamps LL and HL. In addition,
In this embodiment, in the area on the front side of the bottom surface of the lamp body 1, the heights of the bottom surfaces are made equal over both lamps LL and HL, and the step S is provided for the bottom surface of the area immediately after that to the rear portion. 1A is formed.

A fulcrum portion 21 of the optical axis adjusting mechanism is provided outside the upper portion of the integrated reflector 2, and a vertical and horizontal optical axis adjusting portion 22 is provided directly below the fulcrum portion 21. A vertical optical axis adjusting unit 23 is provided at the lower position. As shown in FIG. 5, the optical axis adjustment fulcrum portion 21 has a pivot receiver 24 integrally attached to the back surface of the integrated reflector 2 and a pivot stud 25 provided upright on the inner surface of the lamp body 1 facing the pivot receiver 24. A pivot 26 at its tip is fitted into the pivot receiver 24, and this pivot fitting structure constitutes a fulcrum when the integrated reflector 2 is tilted vertically and horizontally.

The upper, lower, left, right optical axis adjusting unit 22 and the upper, lower, left, right optical axis adjusting unit 23 are respectively adjusted on the back surface of the integrated reflector 2 as represented by the upper, lower, left, right optical axis adjusting unit 22. The nut 27 is attached to the lamp body 1 facing the nut 27, and the adjusting screw 28 is provided in the front-back direction.
Is rotatably supported, and the adjusting screw 28 is screwed into the adjusting nut 27. As a result, when the adjusting screw 28 is rotated, the screwing position of the adjusting nut 27 with respect to the adjusting screw 28 is changed in the front-rear direction, and the integrated reflector 2 is moved upward, downward, leftward, and rightward with the fulcrum 21 as a fulcrum. The optical axis is tilted and its optical axis is adjusted. In this embodiment, the adjusting screw 28 is connected by a bevel gear mechanism 29 to an optical axis adjusting shaft 30 that extends vertically along the back side of the lamp body 1, and the optical axis adjusting shaft 30 extends from the upper side of the lamp. The optical axis can be adjusted by rotating the adjustment shaft 30.

On the other hand, the reflector 3 to which the discharge bulb 5 is attached has a shade 13 for obtaining a desired light distribution characteristic.
Are integrally supported. The connector 11 is attached to the socket of the discharge bulb 5 as described above, and the lighting circuit 1 is connected via the cord 14 connected to the connector 11.
5 is connected. The lighting circuit 15 is composed of a low-voltage circuit section driven by a vehicle-mounted battery voltage, and a starter circuit section that generates a high voltage for lighting the discharge bulb 5 from the output of the low-voltage circuit section, These are integrally mounted in a metal case 16. The lighting circuit 15 is connected to the in-vehicle battery side by a power cord 17 pulled out from the case 16.

The lighting circuit case 16 is formed as flat as possible, and is fixedly attached to the bottom surface of the region of the passing beam lamp LL of the lamp body 1 by a bracket, a screw or the like (not shown). . That is, it is attached to the bottom surface 1A of the bottom surface of the lamp body provided with the step S as described above, the height position of which is increased. Then, the cord 14 as a secondary wiring to which a high voltage is applied by the lighting circuit 15 is pulled out from the case 16, inserted through an insertion hole 18 provided in the lamp body 1, and the connector 11 is attached to the tip thereof. And the connector 11 is connected to the socket 5 of the discharge bulb 5.
The electric connection is made by fitting with a.

According to this structure, since the case 16 of the lighting circuit 15 including the step-up transformer and the large capacitor, which are heavy components, is attached to the bottom surface of the lamp body 1, the weight balance of the entire lamp can be stabilized. Is as described above. In addition to this, since the lighting circuit case 16 is attached to the region 1A in which the bottom surface of the lamp body 1 is raised, the lamp body on the side of the traveling beam lamp LL in which the bottom surface of the lamp body 1 is low. The size in which the lighting circuit case 16 projects below the lamp body 1 can be made smaller than the bottom surface 1A of the lamp body 1. In this case, if the height dimension of the lighting circuit case 16 is substantially equal to the height dimension of the step S on the bottom surface of the lamp body, the protruding dimension thereof is substantially zero. In practice, this is difficult to realize, but at least the lighting circuit case 16 does not project below the lamp body 1 over the entire height. Therefore, the size of the lighting circuit case 16 protruding downward can be reduced as a whole of the lamp, the restriction on the vehicle body design when the headlight is mounted on the vehicle body can be eliminated, and the degree of freedom in designing can be increased. Also, lighting circuit case 1
Since 6 is partly surrounded by the step S and is in contact with the step surface, it is possible to enhance the fixed support force for the lamp body 1 by this contact part and stably support the lighting circuit case 16. Become.

In the low beam lamp LL, the height of the bottom surface 1A of the lamp body 1 is increased to reduce the space in the region below the reflector 3 by that amount. Since the projection size of 3a to the front is made small, the amount of movement of the front edge portion of the lower flat surface portion 3a of the reflector 2 can be reduced even when the reflector 3 is subjected to the vertical aiming operation. Does not interfere with the inner surface of the lamp body 1 to cause a problem of aiming adjustment. On the contrary, in the traveling beam lamp HL, since the vertical size of the reflector 4 can be increased within the size range of the lamp body 1, it is possible to effectively utilize the light emitted by the incandescent bulb 6.

Since the lighting circuit case 16 is made of metal, each component of the lighting circuit 15 is electromagnetically shielded, and electromagnetic waves from the lighting circuit 15 are not leaked to the outside. Further, since the cord 14 on the secondary wiring side pulled out from the lighting circuit case 16 is inserted into the lamp body 1 in the vicinity thereof, radiation of electromagnetic waves from this cord 14 portion is also suppressed. Furthermore, the electromagnetic wave from the cord 14 extended in the lamp body 1 is
An aluminum shield film provided on the inner surface of the lamp body 1, an aluminum film also provided on the reflector 2, the shield plate 12 made of a metal plate, and the like ensure the shield property and prevent electromagnetic radiation.

Here, in the present invention, as shown in FIG. 6, the passing beam lamp LL and the traveling beam lamp H are used.
If the heights of the bottom surfaces 1A and 1B of the lamp body 1 corresponding to H are made different from each other as in the above-described embodiment, the flat surface portions 3a below the reflectors 3 and 4 of the low beam lamp and the traveling beam lamp, The heights of 4a may be equal.
By doing so, the vertical sizes of the reflectors 3 and 4 of both lamps when viewed from the front are aligned, which is effective for enhancing the appearance. Alternatively, by shifting the reflectors 3 and 4 in the vertical direction, the reflector 3
The lower flat surface portion 3a is replaced by the lower flat surface portion 4a of the reflector 4.
You may make it set to a higher position than.

In the above embodiment, the discharge bulb is used for the passing beam lamp, but a discharge bulb may be used for the traveling beam lamp depending on the type of automobile to which it is applied. In addition, the present invention can be applied to a triple combination type lamp in which an auxiliary lamp is integrated in addition to each of the above lamps.

[0023]

As described above, according to the present invention, the bottom of the lamp body of the lamp having the discharge bulb is set at a position higher than the bottoms of other lamps, and a lighting circuit for lighting the discharge bulb is provided on this bottom. Since they are arranged, it is possible to prevent the height of the entire lamp body from increasing, and it is possible to increase the degree of freedom in designing an automobile. In addition, the cord connecting the discharge bulb and the lighting circuit can be shortened, the emission of electromagnetic waves from this portion can be suppressed, and EMI damage to the automobile radio and other electronic devices can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an embodiment of a headlamp of the present invention.

FIG. 2 is a rear view of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

4 is a cross-sectional view taken along the line BB of FIG.

5 is a cross-sectional view taken along the line CC of FIG.

FIG. 6 is a front view of another embodiment of the present invention.

FIG. 7 is a front view of an example of a conventional headlamp.

[Explanation of symbols]

 1 Lamp Body 1A Bottom with High Height 1B Bottom with Low Height 2 Integrated Reflector 3 Reflector for Passing Beam Lamp 4 Reflector for Beam Beam Lamp 3a, 4a Lower Flat 3b, 4b Upper Flat 5 Discharge Valve 6 Halogen bulb 7 Lens 11 Connector 14 Code 15 Lighting circuit 16 Lighting circuit case LL Passing beam lamp HL Traveling beam lamp

Claims (5)

[Claims] 1. A vehicle lamp in which a first lamp using a discharge bulb as a light source and a second lamp using an incandescent bulb as a light source are integrated with each other, and a bottom surface of the first lamp is a second lamp.
Set higher than the bottom of the lamp of
A lighting device for a vehicle having a discharge bulb, wherein a lighting circuit for lighting the discharge bulb is arranged on the bottom surface of the lamp. 2. The reflector of the first lamp and the reflector of the second lamp are internally provided in one lamp body, and
2. The vehicle lamp having a discharge bulb according to claim 1, wherein the width dimension of the reflector of the lamp is larger than the width dimension of the reflector of the second lamp. 3. A vehicle lamp having a discharge bulb according to claim 1, wherein the height dimension of the reflector of the second lamp is larger than the height dimension of the reflector of the first lamp. 4. A vehicle having a discharge bulb according to claim 1, wherein the lighting circuit is arranged in a step portion provided on the bottom surface of the first lamp, and the periphery thereof is partially surrounded by the bottom portion of the first lamp. Light fixture. 5. A vehicular lamp having a discharge bulb according to claim 1, wherein the first lamp is a passing beam lamp and the second lamp is a traveling beam lamp.