JP3274752B2 - Headlight 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 headlamp apparatus for a vehicle using a discharge lamp which needs to apply a high starting voltage at the time of starting.

[0002]

2. Description of the Related Art Conventionally, a halogen lamp has been mainly used as a light source of a vehicle headlamp. Recently, a vehicle headlamp using a high-pressure discharge lamp such as a metal halide lamp as a light source has been developed. I have. In a vehicle headlight device, a low-voltage DC power source such as a battery is used as a power source, so that power for stably lighting this type of discharge lamp (for example, a voltage of 30 to 100 V, a current of 0 to 2.6 A, and a steady state of 35 W).
Requires an inverter circuit. In addition, a high-voltage starting voltage (for example, 12 kV) needs to be applied to instantaneously turn on such a discharge lamp at the time of starting, and a starting circuit for generating the starting voltage is required. That is, as shown in FIG. 13, a vehicle headlight device using a discharge lamp includes a lamp body 3 in which a discharge lamp 1 and a reflector 2 for controlling light distribution of the discharge lamp 1 are provided;
The basic configuration includes an inverter circuit 4 for converting a DC power supply into power for stably lighting the discharge lamp 1 and a starting circuit 5 for generating a starting voltage at the time of starting.

In the configuration shown in FIG. 13, only a discharge lamp 1 and a reflector 2 are provided in a lamp body 3 in the same manner as in a conventional vehicle headlight device using a halogen lamp. The starting circuit 5 is provided outside the lamp body 3. In such a configuration, the same lamp using a halogen lamp can be used as the lamp 3, so that the conventional lamp 3 can be used for a vehicle headlight device using the discharge lamp 1. become.

However, a higher voltage is applied to the discharge lamp 1 than to the halogen lamp, and particularly a very high starting voltage is applied between the starting circuit 5 and the discharge lamp 1 at the time of starting. In the configuration, the high voltage wiring portion is exposed outside the lamp body 3. That is, the user or the like can easily touch the high-voltage wiring portion, and a danger of electric shock or the like occurs.

As a technique for solving this kind of problem, Japanese Patent Laid-Open No. 4-133202 discloses a technique as shown in FIG.
It has been proposed to arrange the starting circuit 5 in the interior space of the lamp body 3 and on the back side of the reflector 2.

[0006]

By mounting the starting circuit 5 and the like inside the lamp body 3, danger such as electric shock can be prevented. However, the starting circuit 5 is fixed inside the lamp body 3. Therefore, there is a problem that a fixture such as a metal fitting is required, which leads to an increase in parts and an increase in the number of assembly steps. In addition, when the number of parts is large, a large number of parts are assembled in a narrow space when the lamp body 3 is downsized, which causes a problem that the assembling work becomes difficult.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, and to make it possible to easily assemble without increasing the number of assembling steps while preventing the high voltage wiring portion from being exposed to the outside of the lamp body. It is still another object of the present invention to provide a headlamp device for a vehicle that can be downsized while installing a starting circuit and the like inside a lamp body.

[0008]

According to the first aspect of the present invention, there is provided a lamp body in which a discharge lamp and a reflector are housed, an inverter circuit for supplying power when the discharge lamp is turned on, and a high voltage start when the discharge lamp is started. In a vehicle headlight device having a starting circuit for applying a voltage, a protrusion is integrally formed on the back surface of the reflector, and a storage recess is formed in the protrusion, and an inverter circuit is provided in the storage recess. And at least a starting circuit among the starting circuit and the starting circuit.

According to a second aspect of the present invention, there is provided a lamp body containing a discharge lamp and a reflector, an inverter circuit for supplying power when the discharge lamp is turned on, and a starting circuit for applying a high starting voltage when starting the discharge lamp. In the headlamp device for a vehicle, a circuit board is disposed along the back surface of the reflector, and at least a part of the starting circuit of the inverter circuit and the starting circuit is mounted on the circuit board. It is characterized by comprising.

A third aspect of the present invention provides a lamp body containing a discharge lamp and a reflector, an inverter circuit for supplying power when the discharge lamp is turned on, and a starting circuit for applying a high starting voltage when starting the discharge lamp. In the headlamp device for a vehicle, a wiring pattern made of a conductor is formed on the back surface of the reflector, and at least a part of the starting circuit of the inverter circuit and the starting circuit is mounted on the wiring pattern. It is characterized by comprising.

According to a fourth aspect of the present invention, there is provided a lamp body containing a discharge lamp and a reflector, an inverter circuit for supplying power when the discharge lamp is turned on, and a starting circuit for applying a high starting voltage when starting the discharge lamp. In the headlamp device for a vehicle, the protrusion is integrally formed on the rear surface of the reflector, and the recess is formed in the protrusion, and at least a start circuit of the inverter circuit and the start circuit is formed. The mounted circuit board is housed in a storage recess.

According to a fifth aspect of the present invention, there is provided a lamp body containing a discharge lamp and a reflector, an inverter circuit for supplying power when the discharge lamp is turned on, and a starting circuit for applying a high starting voltage when starting the discharge lamp. In the vehicle headlamp device having the, the internal space of the lamp body is divided into a plurality of chambers by the partition, at least one of the inverter circuit and the starting circuit, the starting circuit is at least one room different from the discharge lamp and the reflector The starting circuit is inserted into this room from outside the lamp.
The opening is formed in the lamp body .

[0013]

In each of the above-mentioned constitutions, at least the starting circuit is disposed inside the lamp body, so that the high voltage wiring portion is not exposed to the outside of the lamp body and an accident such as electric shock can be prevented. Can be prevented. Further, according to the configuration of the first aspect, the storage recess is formed in the protruding portion integrally provided on the back surface of the reflector, and at least the starting circuit is stored in the storage recess, so that the reflector is provided. When the starting circuit is fixed to the lamp body, the starting circuit is also fixed to the lamp body, and when mounting the starting circuit to the lamp body, there is no need for a fixture for fixing the starting circuit to the lamp body, increasing the number of parts. Therefore, the starting circuit can be easily incorporated even in a case where the size of the lamp body is reduced, without complicating the assembly process.

According to the second aspect of the present invention, the reflector is fixed to the lamp body by mounting at least some components of the starting circuit on the circuit board disposed along the back surface of the reflector. In this case, the circuit board is also fixed to the lamp body, and it is not necessary to use a special case for the starting circuit, and it is possible to arrange some components of the starting circuit in a narrow space. That is, even when the lamp is downsized, the starting circuit can be installed inside the lamp by effectively utilizing the narrow space.

According to the third aspect of the present invention, at least a part of the starting circuit is mounted on the wiring pattern made of a conductor formed on the back surface of the reflector. If the lamp is fixed to the lamp body, some components of the starting circuit are also fixed to the lamp body, and the reflector is also used as a circuit board on which the starting circuit is mounted, effectively using the narrow space inside the lamp body. It can be used for That is, the starting circuit can be installed in a narrower space as compared with the configuration of the second aspect, and the lamp body can be further reduced in size.

According to a fourth aspect of the present invention, a storage recess is formed in a projecting portion integrally provided on the back surface of the reflector, and a circuit board on which at least a starting circuit is mounted is mounted in the storage recess. Therefore, as in the case of the first aspect, if the reflector is fixed to the lamp, the starting circuit is also fixed to the lamp.
In addition, since the storage recess of the reflector functions as a case of the circuit board, and there is no need to provide a separate case, the size can be reduced as compared with a case where a dedicated case is provided in the starting circuit.

According to the configuration of claim 5, the internal space of the lamp body is divided into a plurality of chambers by the partition wall, and at least the starting circuit is housed in one room different from the discharge lamp and the reflector. Since the starting circuit is housed in a dedicated section separated inside the lamp body, it is easy to fix the starting circuit to the lamp body. Moreover, the lighting unit has the same room
The opening to insert the starting circuit from outside the lamp body is formed
Thus, the starting circuit can be easily incorporated in the lamp body.

[0018]

【Example】

(Embodiment 1) In this embodiment, as shown in FIG.
An example in which the starting circuit 5 is attached to the reflector 2 in the internal space of FIG. That is, a bowl-shaped reflector 2 having an open front surface (left surface in FIG. 1) is disposed inside the lamp body 3, and a discharge lamp 1 such as a metal halide lamp is disposed at the bottom of the reflector 2. The lamp body 3 includes a housing 31 having an open front surface, and a translucent cover 32 that covers the front opening of the housing 31. By the way, the reflector 2 having the above shape
In this case, an extra space is formed behind the reflector 2 in the interior space of the lamp body 3. Therefore, in this embodiment, the starting circuit 5 is provided in this extra space. That is, on the back of the reflector 2, the protruding part 2 accommodated in the above-mentioned extra space is provided.
1 is formed integrally, and a ring-shaped storage recess 22 is formed on the rear surface of the protruding base 21. Storage recess 22
A locking piece 23 having elasticity in the radial direction of the ring is provided on an outer wall of the ring, and a stopper 24 protrudes from the rear end of the locking piece 23 inward of the ring along the opening surface of the storage recess 22. Is done. The stopper 24 has a front surface that is substantially parallel to the opening surface of the storage recess 22 and a rear surface that is an inclined surface that is inclined forward toward the inside of the ring. A starting circuit 5 having a case formed in a donut shape is stored in the storage recess 22. Done. Further, since the locking piece 23 has elasticity and the rear surface of the stopper 24 is an inclined surface, the starting circuit 5 is stored in the storage recess 2.
When the pressing member 2 is pressed from behind, the locking piece 23 bends and the starting circuit 5 can be stored in the storage recess 22.

The mount 11 of the discharge lamp 1 can be attached to the inside of the storage recess 22 in the reflector 2. That is, an insertion hole 25 through which the discharge lamp 1 is inserted is formed at the bottom of the reflector 2, and a step 26 having a rear side larger in diameter than the front side is formed at an intermediate part of the insertion hole 25. Have been. An outer collar 12 is formed on a mount 11 of the discharge lamp 1.
Of the discharge lamp 1 is brought into contact with the rear surface of the outer flange 12 by holding a pressing spring 27, which is a leaf spring fixed to the reflector 2, at one end thereof.
It is fixed to.

The discharge lamp 1 and the starting circuit 5 are connected via an electric wire 6a in the internal space of the lamp body 3, and an electric wire 6b connecting the starting circuit 5 and the inverter circuit 4 is inserted into the rear surface of the lamp body 3. Is wired through the bushing 33. The inverter circuit 4 is connected to a DC power supply E such as a battery via a lighting switch 7a. In the above configuration, the discharge lamp 1 can be easily attached to the reflector 2 by the holding spring 27, and the starting circuit 5 is fixed to the reflector 2 simply by pressing the starting circuit 5 against the storage recess 22 formed in the reflector 2. This allows the starting circuit 5 to be easily mounted inside the lamp body 3 without increasing the number of components. In addition, the starting circuit 5 is fixed to the reflector 2 without using a fixing tool such as a screw, and the reflector 2 is fixed inside the lamp body 3 by a conventional technique.
When arranging the starting circuit 5 inside the lamp body 3, it is not necessary to separately use a fixing member, and as a result, the starting circuit 5 can be mounted on the lamp body 3 without increasing the number of components. Moreover, since the starting circuit 5 is fixed only by pressing it on the reflector 2, the assembling work is easy, and even if the lamp body 3 is downsized, it can be easily assembled.

(Embodiment 2) In this embodiment, as shown in FIG. 2, a light source for a low beam which is turned on when a vehicle passes and a light source for a high beam which is turned on when a vehicle is running are provided in the interior space of one lamp body 3. An example in which is stored is shown. Here, the discharge lamp 1 is used as a light source for a low beam, and a halogen lamp 8 is used as a light source for a high beam.
The reflector 2 includes bowl-shaped reflecting mirrors 2a and 2 each having an open front surface for the discharge lamp 1 and the halogen lamp 8.
b, the two reflecting mirrors 2a, 2b
Are joined together. In such a configuration, the two reflecting mirrors 2
A surplus space is formed between the rear portions of a and 2b.
Therefore, a starting circuit 5 necessary for lighting the discharge lamp 1 is provided.
Is disposed between the rear portions of the reflecting mirrors 2a and 2b. That is, the connecting stand 28 is integrally formed between the rear portions of the two reflecting mirrors 2a and 2b, and the storage recess 22 is formed on the rear surface of the connecting stand 28. A locking piece 23 protrudes from the periphery of the opening of the storage recess 22.
A stopper 24 similar to the above is formed. Here, reflector 2
Is fixed to the lamp body 3 by a fixing screw 34.

However, if the starting circuit 5 is pushed into the storage recess 22 from behind the reflector 2, the starting circuit 5 is stored in the storage recess 22 and is stopped by the stopper 24. Outer collar 12 provided on mount 11 of discharge lamp 1
Is held between the reflector 2 by the pressing spring 27 in the same manner as in the first embodiment. An outer flange 42 is also formed on the mount 41 of the halogen lamp 8, similarly to the discharge lamp 1, and the outer flange 42 is sandwiched between the reflector 2 and the holding spring 27. Lenses 29a and 29b are mounted on the front surfaces of the reflecting mirrors 2a and 2b, respectively, to control the beam opening.

The discharge lamp 1 is connected to an electric wire 6a to which a high voltage is applied.
Is connected to the starting circuit 5 in the internal space of the lamp body 3 via the wire, and the starting circuit 5 is connected to the inverter circuit 4 via the electric wire 6b. An electric wire 6c is connected to the halogen lamp 8, and the electric wire 6c is drawn out of the lamp body 3 through the bushing 33 together with the electric wire 6b. Outside the lamp body 3, a changeover switch 7b is connected to a DC power supply E via a lighting switch 7a, and the changeover switch 7b switches between supplying power to the inverter circuit 4 and supplying power to the halogen lamp 8. I have. In other respects, the configuration is the same as that of the first embodiment. Even in the configuration of the present embodiment, the starting circuit 5 can be easily fixed to the reflector 2 simply by pressing it on the reflector 2 from behind.

(Embodiment 3) In this embodiment, as shown in FIG. 3, the starting circuit 5 is mounted on a flexible circuit board 51, and some large components such as a high-voltage pulse transformer are mounted. The reinforcing board 52 is laminated on the circuit board 51 at the position where the wiring is to be performed. Other components except the large components are surface-mounted. As described above, since the starting circuit 5 is mounted on the flexible circuit board 51, the back surface of the reflector 2 and the lamp 3
The starting circuit 5 can be arranged along the reflector 2 in a surplus space formed between the starting circuit 5 and the inner peripheral surface of the starting circuit 5. A portion of the circuit board 51 where the reinforcing substrate 52 is not laminated is fixed using screws screwed to the reflector 2 or an umbrella-shaped locking tool integrally protruded from the back surface of the reflector 2. Fixed. In particular, in the latter structure, the work of fixing the circuit board 51 to the reflector 2 can be easily performed. One end of the reinforcing substrate 52 is fixed to the housing 31 of the lamp body 3 by a fixing screw 53. Another configuration is the first embodiment.
In the configuration of this embodiment, the circuit board 51 on which the starting circuit 5 is mounted is arranged on the back of the reflector 2, so that the starting circuit 5 can be arranged in a narrow space. Further, although a relatively large space is required in the portion where the large parts are mounted, it can be arranged in a narrow space as compared with the case where the entire starting circuit 5 is arranged. Since the weight of the part directly fixed to the lamp 3 is reduced, the fixing operation to the lamp 3 is facilitated.

(Embodiment 4) In the present embodiment, as shown in FIG. 4, an inverter circuit 4 is provided together with a starting circuit 5 in the interior space of the lamp body 3 and is provided outside the lamp body 3. Only the electric wire 6d for connecting to the DC power supply E is drawn out. That is, only a portion to which a low DC voltage is applied is exposed outside the lamp body 3. In this configuration, similarly to the first embodiment, the protrusion 21 is integrally formed at the rear of the reflector 2, and the inverter circuit 4 is formed at the rear of the protrusion 21.
Recesses 22a, 2 for accommodating the starting circuit 5 and the starting circuit 5, respectively.
2b is formed. A locking piece 23 protrudes from the opening edge of each of the storage recesses 22a and 22b, and a stopper 24 is formed at the tip of the locking piece 23. Therefore, if the inverter circuit 4 and the starting circuit 5 are inserted from the rear into the corresponding storage recesses 22a and 22b, respectively, the inverter circuit 4
The starting circuit 5 and the starting circuit 5 are stored in the storage recesses 22a and 22b, and the stopper 24 prevents the falling off.

In this embodiment, the reflector 2 is fixed to the lamp 3 with a buffer 35 made of an elastic material such as rubber sandwiched between the reflector 2 and the inner peripheral surface of the housing 31 of the lamp 3. ing. Therefore, external vibrations and impacts on the discharge lamp 1, the reflector 2, the inverter circuit 4, the starting circuit 5, and the like can be reduced. Other configurations are the same as in the first embodiment.

(Embodiment 5) In this embodiment, as shown in FIG. 5, only large components such as a high-voltage pulse transformer in the starting circuit 5 are mounted on a circuit board 54 composed of a printed circuit board. Is fixed to the housing 31 of the lamp body 3 with screws or the like, and the other components of the starting circuit 5 are mounted using a wiring pattern 55 formed on the back surface of the reflector 2. That is, an insulating layer is formed on at least a part of the back surface of the reflector 2, and wiring is performed by attaching a copper foil to the insulating layer, printing a conductive paint, or plating or depositing a metal. The pattern 55 is formed. By mounting parts on the wiring pattern 55, a part of the starting circuit 5 is formed.

As described above, since the reflector 2 is used as a circuit board and a part of the starting circuit 5 is mounted, the circuit board 54 fixed inside the lamp body 3 mounts only large parts. It is smaller and lighter. As a result, the circuit board 54 can be arranged in a relatively narrow space between the rear surface of the reflector 2 and the inner peripheral surface of the lamp 3.

In this embodiment, only a part of the starting circuit 5 is mounted on the wiring pattern 55 formed on the reflector 2, but the wiring pattern 55 is mounted with the parts of the inverter circuit 4. Further, since the wiring pattern 55 is formed at a position close to the discharge lamp 1, a circuit for controlling the power supplied to the discharge lamp 1 by detecting the light amount and temperature of the discharge lamp 1 is mounted. Is also good. Other configurations are the same as in the first embodiment.

(Embodiment 6) In this embodiment, the opening of the beam is controlled by mounting a lens 29 on the opening of the reflector 2, and the inverter circuit is detected by detecting the damage of the lens 29 due to a collision of a vehicle or the like. 4 and the operation of the starting circuit 5 are stopped. That is, the lens 2
In order to detect the damage of the lamp 9, a holding frame 61 for attaching the lens 29 to the reflector 2 is provided with a damage detecting section 62 using a strain gauge and a damage detecting section 63 for detecting a disconnection when the lamp 3 is damaged. Further, a light detection unit 64 for detecting the light output of the discharge lamp 1 through a through hole formed in the holding frame 61 is also provided. At a portion corresponding to the damage detecting section 63, the holding frame 61 is formed to have a small width and has low strength. By attaching a conductor such as a conductive paint to the low strength portion, when the lamp body 3 is damaged, Is to be disconnected. By providing the damage detection units 62 and 63 and the light detection unit 64 as described above singly or in combination,
The inverter circuit 4 can be controlled. For example, when the lamp body 3 is broken, the inverter circuit 4 is stopped to prevent a danger such as electric shock, and the optical output is monitored to stabilize the optical output. Here, in this embodiment, the configuration in which the starting circuit 5 is directly fixed to the lamp body 3 is adopted, but it is needless to say that the starting circuit 5 may be attached by the structure as in each of the above-described embodiments. Nor.

(Embodiment 7) In Embodiment 1 and the like described above,
While the starting circuit 5 is housed in the case and housed in the housing recess 22 formed at the rear part of the reflector 2, in the present embodiment, as shown in FIG. An example in which the place 22 is used as a case of the starting circuit 5 is shown. That is, the opening portion of the storage recess 22 is closed by the circuit board 51 formed of a printed circuit board on which the components of the starting circuit 5 are mounted, and the space surrounded by the inner peripheral surface of the storage recess 22 and the circuit board 51. Most of the components of the starting circuit 5 are accommodated therein. In this configuration, since a case for storing the starting circuit 5 is not required, the exclusive volume of the starting circuit 5 can be reduced by the amount of the case,
This leads to downsizing of the lamp body 3. Further, a space surrounded by the storage recess 22 and the circuit board 51 may be filled with a synthetic resin molding material for vibration isolation and waterproofing. Other configurations are the same as in the first embodiment.

(Embodiment 8) In this embodiment, as shown in FIG. 8, the internal space of the lamp body 3 is divided into two upper and lower chambers by a partition 36, the reflector 2 is housed in the upper chamber, and the reflector 2 is housed in the lower chamber. In this case, a case 56 including the inverter circuit 4 and the starting circuit 5 is provided. Of the rear surface of the lower chamber
A cover plate 37 is attached to the opening so as to be freely opened and closed. A packing 31a such as an O-ring is attached between the housing 31 and the peripheral surface of the cover plate 37 to be waterproof. High-voltage wiring wire 6a connecting discharge lamp 1 and starting circuit 5
Is a low-voltage electric wire 6d passing through the bushing 33a attached to the partition wall 36 and connecting the inverter circuit 5 and the DC power supply.
Passes through the bushing 33b attached to the lid plate 37. Here, the internal space of the lower chamber is formed so that the gap between the lower chamber and the case 56 is reduced, and a fixing tool such as a screw for fixing the case 56 is not required. Alternatively, a fixture may be used. In addition, lamp 3
In the case where the case 56 has a waterproof structure, the waterproof measures for the case 56 may be simplified. Other configurations are the same as those of the first embodiment.

Here, as shown in FIG. 9, the connection of the electric wire 6a to the starting circuit 5 and the electric wire 6a to the inverter circuit 4
If a detachable connector is used for the connection portion d, the connection work becomes easy. That is,
A terminal pin 57a connected to the electric wire 6a protrudes from the lower part of the lower body of the lamp body 3, and the terminal pin 57a is provided on the case 56.
Is formed, the electric connection with the electric wire 6a is made only by inserting the case 56 into the lower chamber, and the case 56 is formed by the connection between the terminal pin 57a and the pin receiver 57b. It will be fixed in place. In the connection portion with the electric wire 6d, a terminal pin 57a is protruded from the case 56, and a pin receiver 57b connected to the electric wire 6d is provided on the cover plate 37.
Closing 7 makes the electrical connection with the electric wire 6d. In this way, if a connector is formed by the terminal pins 57a and the pin receivers 57b, the connection work becomes easy.

(Embodiment 9) In this embodiment, as shown in FIG. 10, the cover plate 37 is omitted from the configuration of Embodiment 8, and the case 56 is housed in the lower chamber of the lamp 3. The rear surface of the case 56 is aligned with the rear surface of the lamp body 3,
In addition, the case 56 is engaged with the lamp body 3 in a concave and convex manner so as to be prevented from coming off. That is, a locking portion 36a that is bent upward is formed at the rear end of the partition wall 36 so as to regulate the insertion amount of the case 56 into the lamp body 3, and the case 56 contacts the locking portion 36a. The locking surface 56a is formed. Therefore, the insertion amount of the case 56 into the lamp 3 can be regulated, and the rear surfaces of the case 56 and the lamp 3 can be aligned. A packing 31a is interposed between the peripheral surface of the rear end of the case 56 and the lamp body 3 to be waterproof. Other configurations are the same as in the first embodiment.

(Embodiment 10) In Embodiment 8, the interior space of the lamp body 3 is vertically divided by the partition wall 36. In this embodiment, however, as shown in FIG. A partition 36 is provided so as to partition back and forth. Therefore, the discharge lamp 1 is housed in the front room of the lamp body 3 together with the reflector 2, and the inverter circuit 4 and the starting circuit 5 are housed in the rear room of the lamp body 3. Here, the inverter circuit 4 and the starting circuit 5 are separate bodies,
The lamp body 3 is arranged so as to be divided above and below the rear chamber.
An opening is formed by opening the rear surface of the lamp body 3, and the opening portion is covered by a cover plate 37. Here, light 3
A protruding edge 31b is provided on the periphery of the rear end, and the protruding edge 31b is provided in a state where the peripheral portion of the cover plate 37 is overlapped on the protruding edge 31b.
b and the peripheral portion of the cover plate 37 are connected by a stopper 38. The stopper 38 is formed, for example, in the shape of a clip, and holds the projection 31b and the peripheral portion of the cover plate 37 so as to be sandwiched therebetween. Other configurations are the same as in the first embodiment.

(Embodiment 11) In this embodiment, as shown in FIG. 12, the interior space of the lamp 3 is moved back and forth as shown in FIG. A partition 36 for partitioning is provided. The case 56 containing the inverter circuit 4 and the starting circuit 5 is
It is designed to be attached to the rear room from above. When the case 56 is housed in the lamp body 3, the upper surface of the case 56 is aligned with the upper surface of the lamp body 3, and a cover plate for closing the opening of the rear chamber is not required. A packing 31a is interposed between the upper peripheral surface of the case 56 and the lamp body 3 to be waterproof. Other configurations are the same as in the first embodiment.

[0037]

As described above, according to the invention of each claim, since at least the starting circuit is disposed inside the lamp body, the high voltage wiring portion is not exposed to the outside of the lamp body and an accident such as electric shock is prevented. This has the advantage that it can be prevented beforehand. According to the first aspect of the present invention, a storage recess is formed in a protruding portion integrally provided on the back surface of the reflector, and at least a starting circuit is stored in the storage recess. If it is fixed to, the starting circuit will also be fixed to the lamp body,
When assembling the starting circuit to the lamp body, there is no need for a fixture for fixing the starting circuit to the lamp body, and the number of parts does not increase and the assembly work is not complicated. However, there is an advantage that the starting circuit can be easily incorporated.

According to the second aspect of the present invention, at least a part of the starting circuit is mounted on the circuit board disposed along the back surface of the reflector. Is also fixed to the lamp body, and it is not necessary to use a special case for the starting circuit, and there is an advantage that some components of the starting circuit can be arranged in a narrow space. That is, there is an effect that even when the lamp body is downsized, the starting circuit can be housed inside the lamp body by effectively utilizing the narrow space.

According to a third aspect of the present invention, at least some components of the starting circuit are mounted on a wiring pattern made of a conductor formed on the back surface of the reflector. If fixed to the body, some components of the starting circuit are also fixed to the lamp, and the reflector is also used as a circuit board on which the starting circuit is mounted, making it possible to effectively use the narrow space inside the lamp. It has the effect of being able to do it. That is, the starting circuit can be installed in a narrower space as compared with the configuration of the second aspect, and the lamp body can be further reduced in size.

According to a fourth aspect of the present invention, a housing recess is formed in a projecting portion integrally provided on the back surface of the reflector, and a circuit board having at least a starting circuit mounted therein is mounted in the housing recess. Therefore, similarly to the configuration of the first aspect, if the reflector is fixed to the lamp, there is an advantage that the starting circuit is also fixed to the lamp. In addition, since the storage recess of the reflector functions as a case of the circuit board, and there is no need to provide a separate case, there is an effect that the size can be reduced as compared with a case where a dedicated case is provided in the starting circuit.

According to the fifth aspect of the present invention, the interior space of the lamp body is divided into a plurality of chambers by the partition walls, and at least the starting circuit is housed in one room different from the discharge lamp and the reflector.
Since the starting circuit is housed in a dedicated section separated inside the lamp body, there is an advantage that the starting circuit can be easily fixed to the lamp body. Moreover, the lamps are in one room.
Since the opening to insert the starting circuit from outside is formed,
The starting circuit can be easily incorporated in the lamp body.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a first embodiment.

FIG. 2 is a sectional view showing a second embodiment.

FIG. 3 is a sectional view showing a third embodiment.

FIG. 4 is a sectional view showing a fourth embodiment.

FIG. 5 is a sectional view showing a fifth embodiment.

FIG. 6 is a sectional view showing a sixth embodiment.

FIG. 7 is an exploded perspective view of a main part showing a seventh embodiment.

FIG. 8 is a sectional view showing an eighth embodiment.

FIG. 9 is a sectional view of a main part showing an eighth embodiment.

FIG. 10 is a sectional view showing a ninth embodiment.

FIG. 11 is a sectional view showing a tenth embodiment.

FIG. 12 is a sectional view showing an eleventh embodiment.

FIG. 13 is a sectional view showing a conventional example.

FIG. 14 is a sectional view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Discharge lamp 2 Reflector 3 Lamp 4 Inverter circuit 5 Starting circuit 21 Projection part 22 Storage recess 36 Partition wall 51 Circuit board 55 Wiring pattern

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shojiro Kido 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. Inventor Shino Kato 1048 Kazuma Kadoma, Kadoma City, Osaka Pref. Matsushita Electric Works, Ltd. (56) References JP-A-4-26001 (JP, A) JP-A-5-198203 (JP, A) JP-A-5-205 221260 (JP, A) JP-A-4-106801 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F21S 8/10

Claims (5)

(57) [Claims] 1. A vehicle comprising: a lamp body provided with a discharge lamp and a reflector; an inverter circuit for supplying power when the discharge lamp is turned on; and a starting circuit for applying a high starting voltage when starting the discharge lamp. In the headlamp device for use, a protrusion is integrally formed on the back of the reflector, and a storage recess is formed in the protrusion, and at least the starting circuit of the inverter circuit and the starting circuit is housed in the storage recess. A vehicle headlight device, comprising: 2. A vehicle comprising a lamp body provided with a discharge lamp and a reflector, an inverter circuit for supplying power when the discharge lamp is turned on, and a starting circuit for applying a high starting voltage when starting the discharge lamp. In the headlamp device for use, a circuit board is arranged along the back surface of the reflector, and at least a part of the starting circuit of the inverter circuit and the starting circuit is mounted on the circuit board. Vehicle headlight device. 3. A vehicle comprising: a lamp body containing a discharge lamp and a reflector; an inverter circuit for supplying power when the discharge lamp is turned on; and a starting circuit for applying a high starting voltage when starting the discharge lamp. In the headlamp device, a wiring pattern made of a conductor is formed on the back surface of the reflector, and at least a part of the starting circuit of the inverter circuit and the starting circuit is mounted on the wiring pattern. A headlight device for a vehicle characterized by the following. 4. A vehicle comprising a lamp body provided with a discharge lamp and a reflector, an inverter circuit for supplying power when the discharge lamp is turned on, and a starting circuit for applying a high starting voltage when starting the discharge lamp. In the headlamp device for use, a projecting portion is integrally formed on the back surface of the reflector and a storage recess is formed in the projecting portion, and a circuit board on which at least the starting circuit is mounted out of the inverter circuit and the starting circuit is formed. A headlight device for a vehicle, wherein the headlight device is mounted in a storage recess. 5. A vehicle comprising a lamp body provided with a discharge lamp and a reflector, an inverter circuit for supplying power when the discharge lamp is turned on, and a starting circuit for applying a high starting voltage when starting the discharge lamp. In the headlamp device for use, the internal space of the lamp body is divided into a plurality of chambers by the partition, at least the starting circuit of the inverter circuit and the starting circuit is housed in at least one room different from the discharge lamp and the reflector ,
The opening for inserting the starting circuit from outside the lamp into this room
A vehicular headlamp device characterized by being formed .