JPH1166902A - Discharge lamp device for vehicles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge lamp device for vehicles aiming at the reduction of the number of parts and a man-hour for assembly and also aiming at an easy assembly work. SOLUTION: A metal reflector 3 is installed at one end of a nonmetallic housing 2, and a metal bulb cap 11 is installed at another end of the housing 2, and also a metal shield cylinder 21 is installed inside of the housing 2 in contact with the bulb cap 11, and a metal coil spring 16 is interposed between the reflector 3 and the shield cylinder 21 in contact with them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a discharge lamp device for a vehicle.

[0002]

2. Description of the Related Art In recent years, discharge lamps such as metal halide lamps have been used as headlamps for automobiles. Since a high voltage is applied to this type of discharge lamp at the time of starting and lighting, noise is easily generated from a bulb socket and a harness inside the lamp, which may adversely affect on-vehicle equipment such as a radio. Conventionally, in order to reduce the generation of such noise, the valve socket is covered with a metal cover, or the harness is covered with a metal mesh electrostatic shield, and they are electrically connected (as a similar technology, JP 5
-217503).

[0003]

However, in such a conventional technique, since the valve socket and the harness are individually covered with a metal cover or an electrostatic shield, the number of parts and the number of assembly steps are reduced. Is increasing. In addition, since the metal cover and the electrostatic shield must be electrically connected, the assembling work is troublesome.

The present invention has been made by paying attention to such a conventional technique, and aims to reduce the number of parts and the number of assembling steps, and to provide a discharge lamp apparatus for a vehicle which is easy to assemble. .

[0005]

According to the first aspect of the present invention,
Attach a metal reflector or metal reflector cover to one end of the non-metal housing, attach a metal valve cap to the other end of the housing, and attach a metal shield tube inside the housing in contact with the valve cap, Said reflector or reflector cover,
A metal coil spring is interposed between the shield tube and the shield tube so as to be in contact with both.

According to the first aspect of the present invention, the components inside the lamp are not individually shielded with metal, but a reflector or a reflector cover (hereinafter, a reflector, etc.) which is a member surrounding the internal structure of the housing, and a shield. Since the cylinder and the valve cap are each made of metal, and the three members are electrically connected in a state where a metal coil spring is interposed between the reflector or the like and the shield cylinder,
The occurrence of noise can be reduced without individually shielding the internal components. Therefore, the number of parts and the number of assembly steps can be reduced. Since the three members have a conductive state in which they are in contact with each other with the coil spring interposed therebetween, there is no need to electrically connect them with electric wires, and the assembling work is easy. Further, since the reflector and the like are also made of metal, it is possible to prevent noise generated from the valve from entering the inside of the vehicle. Furthermore, since the coil spring is interposed between the reflector and the like and the shield cylinder, aiming (direction adjustment) of the reflector and the like can be easily performed.

According to a second aspect of the present invention, the reflector or the reflector cover has a receiving surface which is in contact with one end of the coil spring, and a rib which engages inside one end of the coil spring on the receiving surface. It is.

According to the second aspect of the present invention, the contact surface with the coil spring is stabilized by the receiving surface formed on the reflector or the like, and the displacement of the coil spring is prevented by the rib engaged with the inside of the coil spring. You.

According to a third aspect of the present invention, a cover flange is formed to extend outward from one end of the shield cylinder and cover the outer periphery of the coil spring.

According to the third aspect of the present invention, since the cover flange is formed at one end of the shield cylinder, it is possible to prevent noise from leaking from a gap between the reflector or the like having the coil spring interposed and the shield cylinder. be able to.

In the invention according to claim 4, an outer peripheral end of a receiving surface formed on the reflector or the reflector cover is in a state of being close to an end of the cover flange.

According to the fourth aspect of the present invention, since the outer peripheral end of the receiving surface is close to the end of the cover flange, noise leaks from the gap between the reflector or the like and the shield cylinder. It can be suppressed reliably.

According to a fifth aspect of the present invention, an electronic circuit is provided in the valve cap, and a ground wire is taken directly or indirectly from the electronic circuit.

According to the fifth aspect of the present invention, since the ground wire is directly or indirectly taken from the electronic circuit provided in the valve cap, the ground wire can be shortened and the shield is formed. Since each component is electrically connected, only one ground wire is required.

According to a sixth aspect of the present invention, a stopper is provided on the inner surface on the other end side of the housing so as to be in contact with the other end of the shield cylinder, and the shield cylinder is attached to the other end of the housing by the valve cap. Pushed to one end side, a gap is formed between the other end of the shield tube and the stopper.

According to the sixth aspect of the present invention, since a gap is formed at the other end of the shield cylinder as a pushing allowance by the valve cap, the other end of the shield cylinder is provided with a coil spring with respect to the valve cap. The contact is made in a state where the force is applied, and a reliable conduction state between the shield cylinder and the valve cap is obtained.

According to a seventh aspect of the present invention, a sensor is provided inside the housing to detect a state in which the valve cap has been removed and the shield cylinder has been moved to the other end by the urging force of the coil spring.

According to the seventh aspect of the present invention, the state in which the valve cap has been removed can be detected by the sensor. Therefore, when the valve cap containing the electronic circuit is removed in response to a signal from the sensor. , Can stop high voltage to the electronic circuit.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS.

The lamp device 1 according to this embodiment is mounted on the left side of the front of the vehicle in the traveling direction. A pair of left and right reflectors 3 and 4 are provided in a housing 2 of the lamp device 1. This reflector 3, 4
Are supported by angle adjusting means (not shown) so that the aiming (direction adjustment) of the reflectors 3 and 4 can be freely performed.

The housing 2 is made of resin, so that it is easy to mold a complicated shape. The left and right reflectors 3, 4 are each made of metal. A bulb 5 of a discharge metal halide lamp as a headlamp is attached to the right reflector 3.

On the front side (one end side) of the housing 2, there is provided a lens 7 for covering the valves 5 and 6. On the rear side (the other end side) of the housing 2, cylindrical portions 8, 9 corresponding to the respective valves 5, 6 are formed, and a rear end opening 10 of the cylindrical portions 8, 9 (see FIG. 2) Are provided with valve caps 11 and 12 for attaching and detaching the valves 5 and 6, respectively.

The structure of the discharge bulb 5 attached to the right reflector 3 will be described below with reference to FIG.

A support hole 13 is formed at the center of the reflector 3, and a valve socket 14 for fixing the valve 5 is provided at three places around the support hole 13 with screws 1.
5 attached. A metal coil spring 16 is further provided around the support hole 13 of the reflector 3.
Are formed in a substantially continuous state. Further, ribs 19 and 20 are formed on the receiving surfaces 17 and 18 to engage with the inside of the front end of the coil spring 16.

In the cylindrical portion 8 of the housing 2, a metal shield tube 21 is provided along the inner surface of the cylindrical portion 8 so as to be movable back and forth. Front end 21 of this shield tube 21
a, a cover flange 22 having an outwardly extending shape is formed, and the rear end of the coil spring 16 is in contact with the cover flange 22. Covering. The end of the cover flange 22 and the receiving surface 17,
18 is close to the outer peripheral end.

The coil spring 16 is provided between the receiving surfaces 17 and 18 of the reflector 3 and the cover flange 2 of the shield cylinder 21.
2 and is interposed in a compressed state, and urges the shield cylinder 21 rearward. Receiving surface 17, 18
Because the front end of the coil spring 16 is in contact with
A rib 19 that stabilizes the contact state with the coil spring 16 and engages with the inside of the coil spring 16;
20 prevents the coil spring 16 from shifting.

A gap S ₁ is provided between the reflector 3 and the shield cylinder 21 to enable aiming of the reflector 3. The gap S ₁ is covered by a cover flange 22 from outside. Have been done.

On the inner surface near the rear end opening 10 of the cylindrical portion 8,
A stopper 23 is formed along the inner circumference. The valve cap 11 attached to the rear end opening 10 is in a state of entering the inside of the tubular portion 8 more than the stopper 23. Thus, the front surface of the valve cap 11, the clearance S ₂ is formed between the stopper 23.

The rear end 21b of the shield cylinder 21 is bent inward, and the rear end 21b is pressed against the front surface of the valve cap 11 by the urging force of the coil spring 16. Therefore, a reliable conduction state between the shield cylinder 21 and the valve cap 11 can be obtained. The rear end 21b of the shield tube 21 contacts the front surface of the valve cap 11 so that the front end 21a
And (cover flange 22), a gap S ₃ of the clearance S ₂ or more intervals are formed between the front end of the cylindrical portion 8.

The valve cap 11 has a hollow shape, and a high-voltage igniter circuit 24 as an “electronic circuit” is provided in the valve cap 11. The igniter circuit 24 and the valve socket 14 are connected by a harness 25 having a margin.

A high voltage current is sent from the power supply 26 to the igniter circuit 24 via the control unit 27. The ground wire 28 is connected to the igniter circuit 24 via the control unit 27.

A micro switch 29 as a "sensor" is provided near the lower receiving surface 18 on the inner surface of the housing 2. This micro switch 29
Button 29a is pressed by the tip of the cover flange 22. This micro switch 29
Is connected to the control unit 27,
The signal when the button 29a is pressed detects that the valve cap 11 is attached to the rear end opening 10.

The lamp device 1 of this embodiment includes a reflector 3 which is a member surrounding the internal structure of the housing 2,
Since the shield tube 21 and the valve cap 11 are made of metal, respectively, and the coil spring 16 is interposed between the reflector 3 and the shield tube 21, the three members are electrically connected. Noise generated from the socket 14 and the harness 25 can be cut off. Since the igniter circuit 24 is housed in the hollow of the valve cap 11, generation of noise from the igniter circuit 24 is also cut off by the valve cap 11. Further, the reflector 3 and the shield tube 2 are formed by the cover flange 22.
It is also possible to suppress the 1 from the gap S ₁ between the leaking noise. This noise shielding effect is further enhanced by the outer peripheral ends of the receiving surfaces 17 and 18 being in a state close to the end of the cover flange 22.

Since the reflector 3, the coil spring 16, the shield cylinder 21, and the valve cap 11 are in a conductive state in which they are in contact with each other, there is no need to electrically connect them with electric wires, and the assembling work is easy.

Further, since the reflector 3 is also made of metal, it is possible to suppress noise generated from the discharge type bulb 5 from entering the vehicle interior. Further, since the coil spring 16 is interposed between the reflector 3 and the shield cylinder 21, the aiming (direction adjustment) of the reflector 3 can be easily performed by an angle adjusting means (not shown).

In addition, since the ground wire 28 is provided from the igniter circuit 24 via the control unit 27, the ground wire 28 can be shortened.
Reflector 3 and shield tube 21 forming the shield
And the like are electrically connected, so that only one ground wire is required.

When the valve cap 11 is removed from the rear end opening 10 of the cylindrical portion 8, the shield tube 21 is pushed by the coil spring 16 and moves rearward due to the existence of the gaps S ₂ and S _3. The rear end 21b of the cylinder 21 contacts the stopper 23. When the shield cylinder 21 moves rearward, the cover flange 22 stops pressing the button 29a of the micro switch 29. A signal that indicates that the pressed state of the button 29a has been released is transmitted to the micro switch 2
9 to the control unit 27. The control unit 27 recognizes from this signal that the valve cap 11 has been removed, and stops the high voltage from the power supply 26 to the igniter circuit 24.

In the above description, an example in which the entire reflector 3 is made of metal has been described. However, the reflector itself may be made of nonmetal, and a metal reflector cover may be attached to the rear surface of the reflector. .

[0039]

According to the first aspect of the present invention, the components inside the lamp are not individually shielded by metal, but the reflector or the reflector cover, which is a member surrounding the internal structure of the housing, the shield tube, and the bulb. Since the caps are each made of metal and the three members are electrically connected in a state in which a metal coil spring is interposed between the reflector or the like and the shield tube, the internal components are not individually shielded. Therefore, the generation of noise can be reduced.
Therefore, the number of parts and the number of assembly steps can be reduced. Since the three members have a conductive state in which they are in contact with each other with the coil spring interposed therebetween, there is no need to electrically connect them with electric wires, and the assembling work is easy. Further, since the reflector and the like are also made of metal, it is possible to prevent noise generated from the valve from entering the inside of the vehicle. Furthermore, since the coil spring is interposed between the reflector and the like and the shield cylinder, aiming (direction adjustment) of the reflector and the like can be easily performed.

According to the second aspect of the present invention, the receiving surface formed on the reflector or the like stabilizes the contact state with the coil spring, and prevents the coil spring from being displaced by the rib engaging the inside of the coil spring. You.

According to the third aspect of the present invention, since the cover flange is formed at one end of the shield cylinder, it is possible to prevent noise from leaking out from the gap between the shield cylinder and a reflector or the like provided with a coil spring. be able to.

According to the fourth aspect of the present invention, since the outer peripheral end of the receiving surface is close to the end of the cover flange, noise leaks from the gap between the reflector and the shield tube. It can be suppressed reliably.

According to the fifth aspect of the present invention, since the ground wire is taken directly or indirectly from the electronic circuit provided in the valve cap, the ground wire can be shortened and the shield is formed. Since each component is electrically connected, only one ground wire is required.

According to the sixth aspect of the present invention, since a gap is formed at the other end of the shield cylinder as a pushing allowance by the valve cap, the other end of the shield cylinder is provided with a coil spring with respect to the valve cap. The contact is made in a state where the force is applied, and a reliable conduction state between the shield cylinder and the valve cap is obtained.

According to the seventh aspect of the present invention, the state in which the valve cap has been removed can be detected by the sensor. Therefore, when the valve cap containing the electronic circuit is removed in response to a signal from the sensor. , Can stop high voltage to the electronic circuit.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a discharge lamp device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line SA-SA shown in FIG.

[Explanation of symbols]

2 housing 3 reflector 5, 6 valve 11 valve cap 16 coil spring 17, 18 receiving surface 19, 20 rib 21 shield cylinder 21a front end 21b rear end 22 cover flange 23 stopper 24 igniter circuit (electronic circuit) 28 ground wire 29 micro switch ( sensor) S ₁ gap S _2, S ₃ gap

Claims (7)

[Claims] 1. A metal reflector or a metal reflector cover is attached to one end of a non-metal housing, a metal valve cap is attached to the other end of the housing, and a metal shield is provided inside the housing in contact with the valve cap. A discharge lamp device for a vehicle, comprising: mounting a tube; and interposing a metal coil spring between the reflector or the reflector cover and the shield tube in a state of being in contact with both. 2. The vehicle according to claim 1, wherein the reflector or the reflector cover has a receiving surface that is in contact with one end of the coil spring, and a rib that engages inside one end of the coil spring is formed on the receiving surface. Discharge lamp device. 3. Extending outward from one end of the shield tube,
3. The discharge lamp device for a vehicle according to claim 1, wherein a cover flange that covers an outer periphery of the coil spring is formed. 4. The discharge lamp device for a vehicle according to claim 3, wherein an outer peripheral end of a receiving surface formed on the reflector or the reflector cover is close to an end of the cover flange. 5. The discharge lamp device for a vehicle according to claim 1, wherein an electronic circuit is provided in the bulb cap, and a ground wire is taken directly or indirectly from the electronic circuit. 6. A stopper protruding from the inner surface of the other end of the housing and capable of contacting the other end of the shield tube, and the shield tube is pushed to one end by a valve cap attached to the other end of the housing. The discharge lamp device for a vehicle according to any one of claims 1 to 5, wherein a gap is formed between the other end of the shield tube and the stopper. 7. The discharge type for a vehicle according to claim 6, wherein a sensor for detecting a state in which the valve cap is removed and the shield cylinder is moved to the other end side by the biasing force of the coil spring is provided inside the housing. Lamp device.