JP2785550B2 - Discharge lamp headlamp device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp headlamp device for a vehicle having a discharge lamp bulb and its lighting circuit.
In particular, the present invention prevents adverse effects due to noise from the discharge lamp and the harness.

[0002]

2. Description of the Related Art A conventional discharge lamp headlamp device for a vehicle is disclosed in, for example, Japanese Patent Application Laid-Open No. 2-165501, and discloses a discharge lamp bulb provided in a lamp housing and irradiation from the bulb. And a reflector that reflects light, and irradiates reflected light from the reflector forward through a condenser lens. In this type of headlamp, a high-voltage pulse is usually applied to the bulb from a lighting control circuit via a high-pressure harness, and the bulb is thereby started.

[0003]

However, in such a discharge lamp headlamp device, since a high-voltage pulse is used, noise is generated from the discharge lamp or the high-voltage harness, which may deteriorate the radio reception performance. .

[0004] It is an object of the present invention to provide a vehicular discharge lamp headlamp device in which the adverse effects of the noise are prevented.

[0005]

The present invention will be described with reference to FIG. 1 showing an embodiment.
And a discharge lamp bulb 1 provided therein.
12 that reflects the irradiation light from the front toward the front
The present invention is applied to a vehicular discharge lamp headlamp apparatus provided with a discharge lamp 1 and a bulb lighting control circuit 2 connected by a high-pressure harness 6 outside the lamp housings 11 and 19. A metal shield member 13 provided so as to cover the discharge lamp bulb 1; and a means for grounding the shield member 13 to the vehicle body, and a discharge lamp bulb mounting washer 1a connected to the shield member 13. A metal case 2a for accommodating the valve lighting control circuit 2, and a high-pressure harness 6 having both ends connected to the washer 1a and the case 2a.
And a grounding means composed of a shielded wire net 31 arranged so as to cover the above, thereby solving the above problem. According to a second aspect of the present invention, the shield member is provided with the reflector 1
2 is constituted by a metal plate 13 arranged so as to cover 2. According to a third aspect of the present invention, the reflector is made of metal, and the reflector is also used as a shield member. According to a fourth aspect of the present invention, a reflector is formed by depositing a metal on a resin material, and this reflector is also used as a shield member. The rubber tube 3 covers the outer periphery of the shield wire mesh 31 and connects the high-pressure harness draw-out hole 19a of the lamp housing and the high-pressure harness draw-in hole 2b of the case 2a in a watertight manner.
2 is further provided.

[0006]

Since the discharge lamp bulb 1 is shielded by the shield member 13, noise from the bulb 1 can be prevented from leaking to the outside. The shield member 13 includes a washer 1a for mounting a discharge lamp bulb, a shield wire mesh 31, and a case 2
The grounding means 100 is grounded through grounding means 100. According to this, in addition to the discharge lamp bulb 1 being shielded,
The high-pressure harness 6 is also shielded by the shield wire net 31. In particular, according to the second aspect of the present invention, since the shield member is formed of the metal plate 13 covering the reflector 12, for example, when the lamp housings 11 and 19 have the holes 11a for venting air, the lamp housings 11 and
Even if air containing moisture is introduced into the inside 19, the air is intensively condensed on the metal plate 13, and the dew on the reflector 12 can be prevented. According to the invention of claim 5, the rubber tube 3 is provided.
2 prevents water or the like from entering the lamp housings 11 and 19 or the case 2a of the bulb lighting control circuit 2.

In the means and means for solving the above problems which explain the constitution of the present invention, the drawings of the embodiments are used to make the present invention easy to understand. However, the present invention is not limited to this.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 4 shows a schematic configuration of a discharge lamp headlamp device for a vehicle according to the present invention, wherein 1 is a discharge lamp bulb constituting a headlamp, and 2 is a controller unit for controlling lighting of the bulb 1. When the light switch 3 is turned on,
The controller unit 2 is supplied with power from the battery 5 via the connector 4, and the controller unit 2 applies a pulse voltage of 10 to 20 KV to the valve 1 via the high-pressure harness 6 to start the valve 1. When the bulb 1 is turned on, an AC voltage of about 100 V is always applied to the bulb 1 via the high-voltage harness 6.

FIG. 1 is a diagram showing the configuration of the headlamp HL and the connection relationship between the headlamp HL and the controller unit 2, FIG. 2 is a partially enlarged view, and FIG. 3 is a line AA 'in FIG. It is sectional drawing. Reference numeral 11 denotes a resin lamp housing (hereinafter, simply referred to as a housing) having openings on a front surface and a rear surface. A resin reflector 12 having a reflection surface 12a is provided at a rear portion of the housing 11 with a support member (not shown). It is attached by. The above-described discharge lamp bulb 1 is mounted on a metal support member 20 fixed to the housing 11 via a valve washer 1a so as to be located at a focal position of the reflector 12.
Further, a base end of a metal plate 13 that covers the reflector 12 is attached to the support member 20, and a distal end of the metal plate 13 reaches near a front opening of the housing 11.

An inner lens 14 for condensing light directly guided from the bulb 1 and reflected light from the reflector 12 is disposed on the front opening side in the housing 11 so that its optical axis coincides with the optical axis of the reflector 12. The inner lens 14 is held below the reflector 12 via a holding member 15. A shade 16 is provided between the bulb 1 and the inner lens 14 for providing a clear cut line to the irradiation light. The shade 16 is screwed to the holding member 15. Further, an outer lens 17 is provided in the front opening of the housing 11 so as to hermetically seal it.
Is installed. An air vent hole 11 a is provided in a lower portion of the housing 11 so that the air in the housing 11 can escape to the outside via the grommet 18.

On the other hand, a metal sleeve 1b is integrally formed at the rear of the valve washer 1a, from which a pair of high-pressure harnesses 6 directly connected to the valve 1 are drawn. As shown in FIG. 3, these high-pressure harnesses 6 are formed by covering a core wire 6a with rubber 6b.
Is pulled out of the housing 11 through the high-pressure harness draw-out hole 19a of the cap 19 attached to the rear opening,
The controller unit 2 is drawn into the case 2a from a high-pressure harness drawing hole 2b formed in the case 2a.

A sleeve 1b of the valve washer 1a.
And a sleeve 2 formed on the periphery of the hole 2b of the case 2a.
c, a shield metal net 31 is provided so as to cover the high-pressure harness 6, and both ends of each shield 1b, 2
c. Here, the case 2a is made of metal, so that the metal plate 13 is made of metal.
0, the body is grounded via the valve washer 1a, the shield wire mesh 31, and the case 2a of the controller unit 2.

The shield wire mesh 31 is covered with a rubber tube 32. One end of the tube 32 is fixed to the inner peripheral surface of the cap 19, and the other end is fitted into the sleeve 2c of the controller unit 2. I have. Thereby, the inside of the housing 11 and the inside of the case 2a of the controller unit 2 are held in a water-tight state, and intrusion of water or the like can be prevented.

In the headlamp apparatus having the above-described structure, when the bulb 1 is turned on as described above, the irradiation light is reflected by the reflection surface 12a of the reflector 12, and then passes through the inner lens 14 and the outer lens 17. Irradiated forward in order. At this time, since the shadow formed by the shade 16 is projected forward by the lens 14, the cut line (the boundary between light and dark) becomes clear, and the orientation characteristics of the dimmer beam with almost no upward leakage light can be obtained.

In the above, since the metal plate 13 is provided so as to cover the reflector 12, the metal plate 13
Accordingly, the valve 1 is shielded, so that noise from the valve 1 does not leak to the outside. In particular, in the case where the housing 11 is provided with the air vent hole 11a as in this embodiment, the following operation and effect can be obtained by the metal plate 13. That is, when the lighted bulb 1 is turned off, the temperature in the housing 11 rapidly decreases. However, when the metal plate 13 is not provided, outside air having a high humidity at this time passes through the grommet 18 and the hole 11a. When the air is guided into the housing 11, the moisture in the introduced air is condensed on the reflection surface 12 a of the reflector 12 due to the temperature drop, and the appearance when viewed from the front is deteriorated. In the present embodiment, the metal plate 13 is provided so as to cover the reflector 12, and the tip of the metal plate 13 reaches the front opening side of the housing 11. Therefore, the dew condensation concentrates on the metal plate 13 and condenses on the reflector 12. Never. Therefore, the appearance does not deteriorate.

Further, in this embodiment, the metal plate 13 is grounded by the valve washer 1a, the shield wire mesh 31 and the case 2a, and the shield wire mesh 31 is provided between the sleeves 1b and 2c. Since the high-pressure harness 6 is completely covered, the high-pressure harness 6 can be completely shielded in addition to the shield of the valve 1.

In the above embodiment, the housing 11 and the cap 19 constitute a lamp housing, the controller unit 2 constitutes a bulb lighting control circuit, the metal plate 13 constitutes a shield member, and the valve washer 1a, the shield wire mesh 31, and the case 2 comprise Each of the grounding means 100 is constituted.

In the above description, the metal plate 13 constitutes a shield member. However, if a metal reflector 40 is used as shown in FIG. 5, for example, the valve 1 can be shielded. Alternatively, for example, as shown in FIG. 6, if a metal 51 such as aluminum is deposited on a resin reflector 50, the shielding effect of the bulb 1 can be obtained. In the above, shield wire mesh 3
1, the high-pressure harness 6 is also shielded. However, when the high-pressure harness 6 is not shielded, the shield member such as the metal plate 13 and the vehicle body are connected to each other by a harness or the like and the body is grounded. You may do so.

[0019]

According to the present invention, a metal shield member is disposed so as to cover a discharge lamp bulb, and a discharge lamp bulb mounting washer connected to the shield member and a metal housing a bulb lighting control circuit. The shield member is grounded to the vehicle body by a case made of, and a shield wire mesh which is connected to both ends of these washers and the case and is arranged so as to cover the high-pressure harness, so that the discharge lamp bulb, the high-pressure harness,
The entire path consisting of the bulb lighting control circuit (the path where a high voltage is generated to light the discharge lamp) will be shielded, and there will be no leakage of noise from any of these paths, and radio performance will not deteriorate. Can be prevented. In particular, according to the invention of claim 2, since the shield member is formed by the metal plate disposed so as to cover the reflector, for example, in the case where the lamp housing has a hole for venting air, the hole is inserted into the lamp housing from the hole. Even if air containing moisture is introduced, the air is intensively condensed on the metal plate and can be prevented from being condensed on the reflector, so that the appearance can be improved. According to the invention of claim 5, the outer periphery of the shield wire mesh is covered with the rubber tube that connects the high-pressure harness draw-out hole of the lamp housing and the high-pressure harness draw-in hole of the case in a watertight state.
The rubber tube can prevent water and the like from entering the lamp housing and the case of the bulb lighting control circuit.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a main part of a vehicular discharge lamp headlamp device according to the present invention.

FIG. 2 is an enlarged view showing a part of FIG. 1;

FIG. 3 is a sectional view taken along line A′-A of FIG. 2;

FIG. 4 is a schematic diagram showing an overall configuration of a headlamp device.

FIG. 5 is a view showing a modified example of the shield member.

FIG. 6 is a view showing a further modification of the shield member.

[Explanation of symbols]

 Reference Signs List 1 discharge lamp bulb 2 controller unit 1a valve washer 1b sleeve 2a case 2c sleeve 6 high-pressure harness 11 housing 11a air vent hole 12 reflector 13 metal plate 14 inner lens 16 shade 17 outer lens 19 cap 31 metal wire mesh 32 rubber tube

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-136938 (JP, A) JP-A-63-313409 (JP, A) JP-A-62-145207 (JP, U) JP-A-59 93004 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F21M 3/02

Claims (5)

(57) [Claims] 1. A discharge lamp bulb provided in a lamp housing, a reflector for reflecting irradiation light from the discharge lamp bulb forward, and a discharge lamp bulb and a high-pressure harness provided outside the lamp housing. A discharge lamp headlamp device for a vehicle, comprising: a metal shield member provided so as to cover the discharge lamp bulb; and means for grounding the shield member to a vehicle body. And said
Washer for mounting the discharge lamp bulb connected to the shield member, front
A metal case that houses the bulb lighting control circuit;
And both ends of these washers and the case are connected to the high-pressure housing.
A shielded wire mesh placed over the
A discharge lamp headlamp device for a vehicle, comprising: 2. The vehicular discharge lamp headlamp device according to claim 1, wherein the shield member is a metal plate arranged to cover the reflector. 3. The discharge lamp headlamp apparatus for a vehicle according to claim 1, wherein the reflector is made of metal, and the reflector also serves as the shield member. 4. The headlamp device for a discharge lamp for a vehicle according to claim 1, wherein the reflector is formed by depositing a metal on a resin material, and the reflector also serves as the shield member. 5. The apparatus according to claim 1, further comprising a rubber tube that covers an outer periphery of the shield wire mesh and connects a high-pressure harness drawing hole of the lamp housing and a high-pressure harness drawing hole of the case in a watertight state. A vehicle discharge lamp headlamp device according to any one of claims 1 to 4.