JP2010198781A - On-vehicle discharge lamp lighting device, vehicular headlamp apparatus, and vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle discharge lamp lighting device capable of easily coping with mutually conflicting requirement specifications from vehicular headlamp apparatuses having various designs. <P>SOLUTION: This on-vehicle discharge lamp lighting device 10 includes a lighting circuit 18 to light a discharge lamp mounted to a vehicle, and cases 11, 12 disposed in the vehicle with the lighting circuit 18 housed in the inside of them. In the lighting circuit 18, an input filter circuit 26, an output filter circuit 27 and the like are mounted to a first kind of printed wiring board 19, and a step-up/down circuit 28, a full bridge circuit 29, a control circuit 30, and the like are mounted to a second kind of printed wiring board 20, an input connector 14 connected with an external power supply and an output connector 15 for supplying power to the discharge lamp are mounted to the first kind of printed circuit board 19, the second kind of printed circuit board 20 is mechanically fixed to the case 11, and the first kind of printed wiring board 19 is mechanically fixed to the second kind of printed circuit board 20 or the case 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an in-vehicle discharge lamp lighting device, a vehicle headlamp apparatus, and a vehicle for lighting a discharge lamp mounted on a vehicle such as an automobile or a train and used for a headlamp.

  The present inventors have already proposed an in-vehicle discharge lamp lighting device applied to an HID lamp (high intensity discharge lamp) that has come to be used in place of a conventional halogen lamp as a headlamp of a vehicle (particularly an automobile). (For example, refer to Patent Document 1).

The on-vehicle discharge lamp lighting device disclosed in Patent Document 1 includes a lighting circuit portion housed in a metal case body and an input connector provided on the peripheral surface of the case body.
The case body is formed in a box shape having a quadrangular opening on one surface. The input connector has a waterproof packing and a ferrite core, and is screwed to the side wall so as to close a hole opened in the side wall of the case body.
The lighting circuit section is composed of a transformer, a non-waterproof, board-mounted output connector, other electronic components, and a mounting board on which these sets are mounted. And is supplied to a high-intensity discharge lamp (HID lamp) for a headlamp via an output connector, a socket, and a harness.
The in-vehicle discharge lamp lighting device is attached to the lamp body of the headlamp by an attachment flange portion provided in the case body.

JP 2002-367413 A (FIG. 1, claim 1)

By the way, in recent years, the design of a vehicle headlamp has taken a wide variety of forms, and it has become a problem in layout design to locate the on-vehicle discharge lamp lighting device in the headlamp.
For example, there is a first type vehicle headlamp device having a large flat portion in the horizontal direction and a thin vertical direction, and a second type vehicle headlamp device that is long in the vertical direction and narrow in the horizontal direction. is there. In the case of the first type of vehicle headlamp, the first type of in-vehicle discharge lamp lighting device is required which has a wide projection surface but is thin, and conversely, the second type of vehicle headlamp In some cases, a second type of in-vehicle discharge lamp lighting device is required which has a high height but a small projection surface.
However, the in-vehicle discharge lamp lighting device disclosed in Patent Document 1 is difficult to easily cope with both the specifications of the first type vehicle headlamp and the second type vehicle headlamp. It is.

  The present invention has been made to solve the above-described problems, and the object thereof is an in-vehicle discharge lamp that can easily cope with conflicting requirements from vehicle headlamps of various designs. The object is to provide a lighting device, a vehicle headlamp, and a vehicle.

  An in-vehicle discharge lamp lighting device according to the present invention includes a lighting circuit unit that lights a discharge lamp mounted on a vehicle, and a case that is housed in the vehicle and that houses the lighting circuit unit. The unit includes a plurality of types of circuit components including a first type circuit component configured by an input filter circuit and an output filter circuit, and a second type circuit component configured by a step-up / down circuit, a full bridge circuit, a control circuit, etc. An input connector electrically connected to an external power source and an electric power to the discharge lamp, comprising a first type and a second type printed wiring board on which the first type and the second type of the circuit components are mounted. The output connector for supplying the first type printed wiring board is mounted on the first type printed wiring board, and the first type printed wiring board is electrically connected between the first type printed wiring board and the second type printed wiring board. Seed and said second kind circuit Products are electrically connected, the second type printed wiring board is mechanically fixed to the case, and the first type printed wiring board is mechanically fixed to the second type printed wiring board or the case. It is characterized by being.

In the present invention, an input connector electrically connected to an external power source and an output connector for supplying electric power to the discharge lamp are mounted on the first type printed wiring board, and the first type printed wiring board and the second type printed wiring are mounted. The first type and second type circuit components are electrically connected by wiring electrically connecting the board, the second type printed wiring board is mechanically fixed to the case, and the first type printed wiring board is It was mechanically fixed to the second type printed wiring board or case.
Thereby, the projection surface is wide but the height can be reduced with respect to the vehicular headlamp apparatus which has a large flat portion in the horizontal direction and is thin in the vertical direction. In addition, the height of the vehicle headlight fixture that is long in the vertical direction and narrow in the horizontal direction is high, but the projection surface can be reduced.
Therefore, by increasing the degree of freedom in layout design, it is possible to easily cope with conflicting required specifications from vehicle headlamps of various designs.

  The in-vehicle discharge lamp lighting device according to the present invention is characterized in that, in the above-described in-vehicle discharge lamp lighting device, the first type printed wiring board is arranged on a plane different from and parallel to the second type printed wiring board. To do.

In the present invention, the first type printed wiring board is arranged on a different plane parallel to the second type printed wiring board.
Therefore, it is possible to easily cope with a vehicle headlamp device having a small effective mounting area.

  The in-vehicle discharge lamp lighting device according to the present invention is characterized in that, in the in-vehicle discharge lamp lighting device, the first type printed wiring board is arranged in parallel and on the same plane as the second type printed wiring board. To do.

In the present invention, the first type printed wiring board is arranged in parallel and on the same plane as the second type printed wiring board.
Therefore, it is possible to easily cope with a vehicle headlamp having a low effective mounting height.

  The vehicle headlamp apparatus according to the present invention is characterized by using the on-vehicle discharge lamp lighting device.

  In the present invention, it is possible to provide a vehicular headlamp that can easily meet various required specifications by increasing the degree of freedom in layout design.

  A vehicle according to the present invention is equipped with a vehicle headlamp apparatus using the above-described in-vehicle discharge lamp lighting device.

  In the present invention, it is possible to provide a vehicle including a vehicle headlamp device that can easily meet various required specifications by increasing the degree of freedom in layout design.

According to the vehicle-mounted discharge lamp lighting device, the vehicle headlamp apparatus, and the vehicle according to the present invention, the lighting circuit unit for lighting the discharge lamp mounted on the vehicle, and the lighting circuit unit are housed inside and disposed in the vehicle. And the lighting circuit unit is a first type circuit component composed of an input filter circuit and an output filter circuit, and a second type circuit component composed of a step-up / down circuit, a full bridge circuit, a control circuit, etc. An input connector that is electrically connected to an external power source, and includes a first type and a second type printed wiring board on which each of the first and second types of circuit components is mounted. And an output connector for supplying electric power to the discharge lamp is mounted on the first type printed wiring board, and is electrically connected between the first type printed wiring board and the second type printed wiring board. Type 1 and Type 2 circuit components are electrical Is connected to the second type printed circuit board is mechanically fixed to the case, the first one printed circuit board is mechanically fixed to the second type printed wiring board or case.
Thereby, it has the effect that it can respond easily to the conflicting required specification from the vehicle headlamp apparatus of various designs.

1 is an external perspective view of an in-vehicle discharge lamp lighting device according to a first embodiment of the present invention. 1 is an exploded perspective view of the in-vehicle discharge lamp lighting device of FIG. FIG. 1 is an external perspective view of a harness for connecting the in-vehicle discharge lamp lighting device of FIG. 1 to a vehicle headlamp. External perspective view of an in-vehicle discharge lamp lighting device according to a second embodiment of the present invention 4 is an exploded perspective view of the in-vehicle discharge lamp lighting device of FIG.

  Hereinafter, an in-vehicle discharge lamp lighting device, a vehicle headlamp apparatus, and a vehicle according to a plurality of embodiments of the present invention will be described with reference to the drawings. In the following description, illustrations of the vehicle headlamp apparatus and the vehicle are omitted.

(First embodiment)
As shown in FIG. 1, the in-vehicle discharge lamp lighting device 10 according to the first embodiment of the present invention is for lighting a vehicle headlamp, and has, for example, a rectangular box-shaped opening. A metal case body 11 constituting one of the cases and a plastic case flange 12 constituting the other of the cases combined with the case body 11 constitute an outer shell.

  The in-vehicle discharge lamp lighting device 10 assembles the case flange 12 by forming the caulking portion 13 by deforming the claw portion provided at the upper end portion of the case body 11 after the case flange 12 is assembled to the case body 11 from above. Tightly tightened.

  Since the case body 11 dissipates heat generated from the internal lighting circuit to the outside of the lighting device, it is preferable to select a metal material having high thermal conductivity. In addition, among the metal materials, aluminum has a high thermal conductivity and is lightweight, which contributes to the weight reduction of the in-vehicle discharge lamp lighting device 10 itself. Other metal materials can be substituted. Moreover, in order to improve the heat dissipation performance from the case body 11 to the outside, fins for heat dissipation may be provided on the outer surface and the outer bottom surface.

  The case flange 12 includes an input connector 14 and an output connector 15 of the lighting device, and a mounting rib 16 for fixing the in-vehicle discharge lamp lighting device 10 to a vehicle headlamp, and a fitting portion 17 for positioning during mounting work. It has. The input connector 14 and the output connector 15 are formed so as to protrude upward inside the fitting portion 17.

  In order to fix the in-vehicle discharge lamp lighting device 10 to the headlamp, the case flange 12 may be made of plastic as a material as long as various mechanical strengths are satisfied. In this case, since it is lightweight, it contributes also to weight reduction of in-vehicle discharge lamp lighting device 10 itself. Other metal materials can be substituted.

  For example, two to four mounting ribs 16 for mounting the in-vehicle discharge lamp lighting device 10 to the headlamp are provided. The arrangement of the caulking portion 13 is determined in consideration of the mounting rib 16.

  As shown in FIG. 2, inside the case body 11 and the case flange 12, a discharge lamp lighting circuit unit 18 for lighting the discharge lamp is divided into a plurality of printed wiring boards 19 and 20 according to functions.

  The discharge lamp lighting circuit unit 18 includes a first type circuit component including an input filter circuit 26 and an output filter circuit 27, and a second type circuit including a step-up / down circuit 28, a full bridge circuit 29, a control circuit 30, and the like. A plurality of types of circuit components including components, and a first type printed wiring board 19 and a second type printed wiring board 20 on which the first type and the second type of circuit components are mounted are provided.

  On the first type printed wiring board 19, an input terminal 21 electrically connected to an external power source and an output terminal 22 for supplying power to the discharge lamp are mounted.

  The input terminal 21 and the output terminal 22 are accommodated in the input connector 14 and the output connector 15 on the case flange 12, respectively, so that power supply from outside and power connection to the outside are possible.

  The first type printed wiring board 19 and the second type printed wiring board 20 protrude downward from the lower surface of the first type printed wiring board 19 and are electrically connected (jumper wires) 23 to each other. Thus, the first type circuit component and the second type circuit component are electrically connected.

The second type printed wiring board 20 is mechanically fixed to the case body 11 with screws 24, and the first type printed wiring board 19 is mechanically fixed to the second type printed wiring board 20 or the case body 11.
As a result, the first type printed wiring board 19 is arranged on a plane different from the second type printed wiring board 20 in parallel.

  The second type printed wiring board 20 can be fixed to the case body 11 by a mechanical fixing method without using the screws 24. For example, there are a method in which a protrusion provided in the case body 11 is passed through a hole provided in the second type printed wiring board 20 and fixed by caulking, a method of bonding with an adhesive, or the like, and these may be combined.

  In order to fix the first type printed wiring board 19 to the second type printed wiring board 20, it is placed on the spacer 25 provided on the second type printed wiring board 20 and positioned, and the protruding portion on the upper part of the spacer 25 is caulked. And a method of mechanically fixing with a screw by providing a screw hole in the upper part of the spacer 25. Alternatively, when the first type printed wiring board 19 is fixed to the case body 11, it is placed on a protruding portion provided inside the case body 11, and a part of the case body 11 is mechanically fixed by caulking or after positioning by the protruding portion. You may combine the method of fixing with an adhesive agent, and them.

  The first type printed wiring board 19 includes an input filter circuit 26 and an output filter circuit 27 in addition to the human power terminal 21, the output terminal 22, and the wiring 23.

  The second type printed wiring board 20 includes a step-up / step-down circuit 28, a full bridge circuit 29, a control circuit 30, and a spacer 25.

  A shield member 31 is disposed in the discharge lamp lighting circuit portion 18 in the case body 11 for the purpose of blocking various noises.

  Although the shield member 31 uses a metal flat plate, there is a method of vapor-depositing metal on the inner surface of the case flange 12, and can be omitted when the case flange 12 is made of metal.

  A seal member 32 is disposed at a fitting portion between the case body 12 and the case flange 11.

  The seal member 32 protects the internal discharge lamp lighting circuit 18 from the surrounding environment such as water droplets, humidity, and dust.

  The seal member 32 includes an O-ring shaped member made of a flexible material such as rubber or elastomer, a method of applying and curing a liquid sealant, and a combination thereof.

  As shown in FIG. 3, when the in-vehicle discharge lamp lighting device 10 is connected to the HID lamp, a harness 60 having a socket 61 for the HID lamp is used, and a connector 62 at the tip of the harness 60 is connected to the in-vehicle discharge lamp. It is connected to the output connector 15 of the lighting device 10.

  Such an in-vehicle discharge lamp lighting device 10 mechanically fixes the first-type printed wiring board 19 to the second-type printed wiring board 20 or the case body 11, and moves upward inside the fitting portion 17 of the case flange 12. The connector 62 of the harness 60 is connected to the output connector 15 that is formed so as to protrude toward the front.

In the on-vehicle discharge lamp lighting device 10 of the first embodiment, the input connector 14 that is electrically connected to an external power source and the output connector 15 for supplying power to the discharge lamp are mounted on the first type printed wiring board 19, The first type and second type circuit components are electrically connected by the wiring 23 that electrically connects the first type printed wiring board 19 and the second type printed wiring board 20, and the second type printed wiring board 19 is connected. Was mechanically fixed to the case body 12, and the first type printed wiring board 19 was mechanically fixed to the second type printed wiring board 20 or the case body 11.
Thereby, the projection surface is wide but the height can be reduced with respect to the vehicular headlamp apparatus which has a large flat portion in the horizontal direction and is thin in the vertical direction.
Therefore, by increasing the degree of freedom in layout design, it is possible to easily cope with conflicting required specifications from vehicle headlamps of various designs.

In the in-vehicle discharge lamp lighting device 10 of the first embodiment, the first type printed wiring board 19 is arranged in a plane parallel to and different from the second type printed wiring board 20.
Therefore, it is possible to easily cope with a vehicle headlamp device having a small effective mounting area.

  In the vehicle headlamp apparatus according to the first embodiment, it is possible to provide a vehicle headlamp apparatus that can easily cope with various required specifications by increasing the degree of freedom in layout design.

  In the vehicle according to the first embodiment, it is possible to provide a vehicle including a vehicle headlamp device that can easily cope with various required specifications by increasing the degree of freedom in layout design.

(Second Embodiment)
Next, an in-vehicle discharge lamp lighting device, a vehicle headlamp apparatus, and a vehicle according to a second embodiment of the present invention will be described. In the following embodiments, components that are the same as those in the first embodiment described above or functionally similar components are simplified or omitted by giving the same reference numerals or equivalent symbols in the drawings. To do.

  As shown in FIG. 4, the in-vehicle discharge lamp lighting device 40 according to the second embodiment of the present invention includes a metal case body 41 constituting one of cases having a square box-shaped opening, and a case body 41. The outer case is constituted by a case cover 42 made of plastic, for example, which constitutes the other of the cases to be combined.

  The in-vehicle discharge lamp lighting device 40 assembles the case cover 42 by assembling the case cover 42 to the case body 41 from above, and then forming the caulking portion 43 by deforming the claw portion provided at the upper end of the case body 41. Tightly tightened.

  The case body 11 has an input connector 44 and an output connector 45 for the lighting device arranged on the side thereof.

  The case cover 42 includes a mounting rib 46 for fixing the in-vehicle discharge lamp lighting device 40 to the headlamp of the automobile.

  The case cover 42 may be made of plastic as a material as long as various mechanical strengths are satisfied in order to fix the in-vehicle discharge lamp lighting device 40 to the headlamp. In this case, since it is lightweight, it contributes also to weight reduction of in-vehicle discharge lamp lighting device 40 itself. Other metal materials can be substituted. Two to four mounting ribs 46 for mounting the in-vehicle discharge lamp lighting device 40 to the headlamp are provided.

  As shown in FIG. 5, inside the case body 41 and the case cover 42, the discharge lamp lighting circuit unit 18 that lights the discharge lamp is divided into a plurality of printed wiring boards 47 and 48 according to functions.

  On the first type printed wiring board 47, an input connector 44 electrically connected to an external power source and an output connector 45 for supplying electric power to the discharge lamp are mounted.

  The input connector 44 and the output connector 45 are respectively fixed to the case body 41 by being dropped into guide grooves 49 provided on the side portions of the case body 41, so that external power supply connection and external power connection are possible. Become.

  The first type printed wiring board 47 and the second type printed wiring board 48 protrude from the side portion of the first type printed wiring board 47 toward the second printed wiring board 48 and are electrically connected to each other. The wiring (jumper wire) 50 electrically connects the first type circuit component and the second type circuit component.

  The first type printed wiring board 47 and the second type printed wiring board 48 are mechanically fixed to the case body 41 with screws 24.

The second type printed wiring board 48 is mechanically fixed to the case body 41, and the first type printed wiring board 47 is mechanically fixed to the second type printed wiring board 48 or the case body 41.
As a result, the first type printed wiring board 47 is arranged in parallel and on the same plane as the second type printed wiring board 48.

  The first type printed wiring board 47 includes an input filter circuit 26 and an output filter circuit 27 in addition to the input connector 44, the output connector 45, and the wiring 50.

  The second type printed wiring board 48 includes a step-up / step-down circuit 28, a full bridge circuit 29, and a control circuit 30.

In the in-vehicle discharge lamp lighting device 40 of the second embodiment, the first type printed wiring board 47 is arranged in parallel and on the same plane as the second type printed wiring board 48.
Therefore, it is possible to easily cope with a vehicle headlamp having a low effective mounting height.

  In addition, the electronic components etc. which comprise the discharge lamp lighting circuit part 18 used by each said embodiment are not limited to what was illustrated, and can be changed suitably.

10, 40 In-vehicle discharge lamp lighting device 11, 41 Case body (case)
12 Case flange (case)
14, 44 Input connector 15, 45 Output connector 18 Discharge lamp lighting circuit (lighting circuit)
19, 47 First type printed wiring board 20, 48 Second type printed wiring board 23, 50 Wiring 26 Input filter circuit (first type circuit component)
27 Output filter circuit (Type 1 circuit components)
28 Buck-Boost Circuit (Type 2 Circuit Parts)
29 Full bridge circuit (Type 2 circuit components)
30 Control circuit (Type 2 circuit components)
42 Case cover (case)

Claims (5)

A lighting circuit portion for lighting a discharge lamp mounted on the vehicle, and a case disposed in the vehicle with the lighting circuit portion housed therein,
The lighting circuit section includes a plurality of types of circuits including a first type circuit component including an input filter circuit and an output filter circuit, and a second type circuit component including a buck-boost circuit, a full bridge circuit, and a control circuit. A component, and a first type and a second type printed wiring board on which each of the first type and the second type of the circuit component is mounted,
An input connector electrically connected to an external power source and an output connector for supplying power to the discharge lamp are mounted on the first type printed wiring board,
The first-type printed wiring board and the second-type printed wiring board are electrically connected to each other by wiring that electrically connects the first-type printed wiring board and the second-type printed wiring board. An in-vehicle discharge lamp lighting device, wherein the board is mechanically fixed to the case, and the first type printed wiring board is mechanically fixed to the second type printed wiring board or the case.   The in-vehicle discharge lamp lighting device according to claim 1, wherein the first type printed wiring board is disposed on a plane different from and parallel to the second type printed wiring board.   The in-vehicle discharge lamp lighting device according to claim 1, wherein the first type printed wiring board is arranged in parallel and on the same plane as the second type printed wiring board.   A vehicle headlamp apparatus comprising the in-vehicle discharge lamp lighting device according to claim 1.   A vehicle equipped with a vehicle headlamp apparatus using the in-vehicle discharge lamp lighting device according to claim 1.

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