JP4635623B2 - Discharge lamp lighting device and lighting apparatus including the same - Google Patents

Description

  The present invention relates to a discharge lamp lighting device for starting and controlling a discharge lamp, and a lighting fixture including the same.

  Conventionally, this type of discharge lamp lighting device controls the lighting of the discharge lamp, a socket (bulb socket) in which the discharge lamp is mounted, an igniter section for supplying a pulse voltage to the discharge lamp and starting the discharge lamp. A lighting circuit unit (inverter stable lighting circuit unit) is provided, and is provided in a lighting fixture. Patent Document 1 discloses a discharge lamp lighting device in which an igniter section and a lighting circuit section are integrally formed. Patent Document 2 discloses a discharge lamp lighting device in which a socket and an igniter unit are integrally formed.

In recent years, lighting fixtures that use HID discharge lamps as light sources and are used as headlamps or auxiliary lamps (fog lamps) have spread from large cars to small cars and mini cars. Thereby, the further reduction in size and cost reduction of the discharge lamp lighting device in the said lighting fixture is desired.
JP 2001-338506 A (pages 3 and 4 and FIG. 2) JP 2002-367414 A (pages 3 and 4 and FIG. 1)

  However, in the above conventional discharge lamp lighting device, parts that are not integrally formed are connected by a harness. The harness has a problem that a very expensive noise shield wire such as a mesh wire has to be used in order to reduce noise generated from the discharge lamp when the polarity of the lamp current is reversed. In particular, when the lighting fixture itself is very small, such as an auxiliary light arranged on the front lower surface of the automobile, the socket, the igniter part, and the lighting circuit part are not all housed in the lamp body, and a part is outside the lamp body. Is provided. Thereby, it is necessary to waterproof the noise shield wire, and there is a problem that the cost is further increased and the size is increased. Further, the conventional discharge lamp lighting device has a problem that the pulse voltage supplied from the igniter to the discharge lamp is attenuated on the transmission path.

  The present invention has been made in view of the above points, and the object of the present invention is to enhance the shielding effect of noise generated from a discharge lamp, and to realize cost reduction and downsizing. A further object is to provide a discharge lamp lighting device capable of reducing the attenuation of the pulse voltage in the transmission path from the igniter section to the discharge lamp, and a lighting fixture including the same.

The invention according to claim 1 is a socket for mounting a discharge lamp, an igniter section for supplying a pulse voltage to the discharge lamp to start the discharge lamp, a lighting circuit section for controlling lighting of the discharge lamp , to position the igniter portion closer than the lighting circuit unit to the front Symbol socket, said socket, and a case for housing the igniter unit and the lighting circuit unit is provided around the discharge lamp reflector At least one of the plate and the lamp main body that houses the reflection plate and the case are formed of a conductive material and are electrically connected .

  In this configuration, the case has the same potential as the reflector or the lamp body, so that the shielding effect of noise generated from the discharge lamp can be enhanced, and the socket, igniter section, and lighting circuit section must be connected by a noise shield wire. Therefore, cost reduction and downsizing can be realized. Moreover, attenuation of the pulse voltage in the transmission path from the igniter to the discharge lamp can be reduced.

  According to a second aspect of the present invention, in the first aspect of the present invention, the igniter section includes a filter section that electrically connects a portion having a ground potential to the case. In this configuration, noise generated from the discharge lamp can be further reduced.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the lighting circuit unit includes a heat generating component on a side opposite to the socket side. In this configuration, the heat generated from the heat-generating component can be effectively released to the case and cooled.

  The invention according to claim 4 is the invention according to claim 3, wherein the heat generating component is exposed to the outside of the lamp body. In this configuration, since the heat dissipation effect of the heat generating component can be enhanced, the temperature of the heat generating component can be further increased, and an inexpensive component can be used.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the igniter unit includes a separately-excited trigger circuit type semiconductor switching element in order to generate the pulse voltage. Features. In this configuration, since the upper limit value of the pulse voltage can be limited by the separately excited trigger circuit method, it is possible to realize downsizing.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the lighting circuit portion and the igniter portion are mounted on the same substrate. In this configuration, since the igniter portion and the lighting circuit portion can be integrated, it is possible to achieve downsizing.

  According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, at least one of the igniter section and the lighting circuit section wires a transformer and a winding of the transformer inside. And a substrate. In this configuration, since the transformer winding can be mounted in the substrate, the size can be reduced.

  Invention of Claim 8 is the discharge lamp lighting device in any one of Claims 1-7, the discharge lamp controlled by the said discharge lamp lighting device, the reflecting plate provided around the said discharge lamp, And a lamp body that houses the reflecting plate therein.

  In this configuration, the case has the same potential as the reflector or the lamp body, so that the shielding effect of noise generated from the discharge lamp can be enhanced, and the socket, igniter section, and lighting circuit section must be connected by a noise shield wire. Therefore, cost reduction and downsizing can be realized. Moreover, attenuation of the pulse voltage in the transmission path from the igniter to the discharge lamp can be reduced.

  The invention according to claim 9 is the invention according to claim 8, wherein the case is fixed to the lamp body. In this configuration, since it is not necessary to provide a part for waterproofing between the case and the lamp body, it is possible to reduce the size.

  The invention according to claim 10 is the invention according to claim 8, wherein the case is fixed to the reflecting plate, is formed in an annular shape, and is joined to the lamp body at the outer peripheral edge, and is joined to the reflecting plate at the inner peripheral edge. A movable elastic body is provided. In this configuration, the inside of the lamp body can be waterproofed, and the optical axis can be adjusted by moving the reflector when mounted on a vehicle or the like.

  According to an eleventh aspect of the present invention, in the invention according to the eighth aspect, the case is fixed to the reflecting plate, is formed in an annular shape, is joined to the lamp body at the outer periphery, and is joined to the case at the inner periphery. A flexible elastic body is provided. In this configuration, the inside of the lamp body can be waterproofed, and the optical axis can be adjusted by moving the reflector when mounted on a vehicle or the like.

  The invention of claim 12 is characterized in that, in the invention of claim 8, the case is housed in the lamp body. With this configuration, downsizing can be realized.

  According to the present invention, it is possible to enhance the shielding effect of noise generated from the discharge lamp, to realize cost reduction and downsizing, and to attenuate the pulse voltage in the transmission path from the igniter section to the discharge lamp. Can be reduced.

(Embodiment 1)
First, the basic configuration of the first embodiment will be described with reference to FIGS. As shown in FIG. 2, the lighting fixture of Embodiment 1 is an in-vehicle lighting fixture used as a headlamp or an auxiliary lamp, for example, and includes a discharge lamp 1, a lamp 2, and a discharge lamp lighting device 3. ing.

  As shown in FIG. 1, the discharge lamp 1 is, for example, an automobile HID lamp (HID bulb) having a one-piece base structure, and includes a base part 10, a light emitting part 11, and a glass tube 12 covering the light emitting part 11. A central electrode 13 connected to one end of the light emitting unit 11, an outer electrode 14 connected to the other end of the light emitting unit 11, and a protective tube 15 covering the outer electrode 14. The discharge lamp 1 has both a waterproof type (HB3, HB4, etc.) and a non-waterproof type (H3, H4, etc.), and can be appropriately selected according to the application and structure.

  The base part 10 includes a flange 100 and a pair of electrode parts (not shown) therein. The flange 100 is fixed to the lamp 2 (see FIG. 2) at one end face 100a. In the first embodiment, the flange 100 is fixed to a reflection plate 22 (see FIG. 2) described later. One of the pair of electrode portions is connected to the center electrode 13, and the other is connected to the outer electrode 14. The light emitting unit 11 is a light source that emits light when a high voltage is applied. The center electrode 13 and the outer electrode 14 are disposed in the vicinity of the light emitting unit 11 from the outside of the glass tube 12 so that electric power is supplied from the discharge lamp lighting device 3 to the light emitting unit 11.

  As shown in FIG. 2, the lamp 2 includes a lamp body 20, a seal packing 21, a reflecting plate 22, a front lens 23, and a front lens seal portion 24. The lamp body 20 is formed in a box shape using a conductive material such as metal, for example, and integrally includes a bottom portion 200 having an opening 200a and a side portion 201 extending from the bottom portion 200. . The lamp body 20 houses the light emitting unit 11 and the reflecting plate 22 of the discharge lamp 1 and protects them from the external environment. The base 10 of the discharge lamp 1 is inserted into the opening 200a. The seal packing 21 is, for example, a rubber molded product or an elastic resin, and is provided between the bottom portion 200 of the lamp body 20 and a left side surface 40 of the case 4 to be described later, and maintains the interior of the lamp 2 in a substantially waterproof environment. Yes.

  The reflection plate 22 is formed of, for example, a conductive material such as metal and is provided around the discharge lamp 1 and guides light emitted from the discharge lamp 1 in a predetermined direction. The front lens 23 is formed of a material having transparency, and emits light guided in a predetermined direction by the reflecting plate 22 to the outside without being blocked. The front lens seal portion 24 is formed of, for example, an adhesive such as a hot meter, rubber packing, and the like, and is provided between the lamp body 20 and the front lens 23, and maintains the interior of the lamp 2 in a substantially waterproof environment. is doing.

  As shown in FIG. 1, the discharge lamp lighting device 3 includes a case 4, a socket 5, an igniter unit 6, and a lighting circuit unit 7, and is provided along the bottom 200 (see FIG. 2) of the lamp body 20. It has been.

  The case 4 is formed in a box shape with a conductive material such as metal, for example. The socket 5, the igniter unit 6, and the igniter unit 6 are positioned closer to the socket 5 than the lighting circuit unit 7. The lighting circuit unit 7 is accommodated. The case 4 is directly fixed to the lamp body 20. As a fixing method, for example, there are a method of fixing by screwing, a method of rotating the case 4 and fitting each fitting portion (not shown), and fixing. In addition, the case 4 includes a connecting portion 41 on the left side surface 40, and has openings 40a and 42a on the left side surface 40 and the lower surface 42, respectively. As shown in FIG. 2, the connecting portion 41 is formed of a conductive material such as metal, and electrically connects the case 4 and the lamp body 20.

  From the above, it is possible to reduce the FM band and TV band noise generated from the discharge lamp 1 when the lamp current is inverted in polarity without using an expensive noise shield line.

  The socket 5 is fitted to the cap portion 10 of the discharge lamp 1 inserted into the opening 40a and attached to the discharge lamp 1 by, for example, a bayonet fastening structure. The socket 5 includes a pair of output terminals 50 and 51 that are electrically connected to a pair of electrode parts (not shown) of the base part 10, and outputs electricity to the discharge lamp 1 from the igniter part 6 to be described later. Route.

  The igniter section (discharge lamp starting device) 6 includes a plurality of electronic components including a capacitor 60, a discharge gap (switch element) 61 connected in parallel to the capacitor 60, and a pulse transformer 62, and supplies a pulse voltage to the discharge lamp 1. Thus, the lighting of the discharge lamp 1 is started. The plurality of electronic components are mounted on a substrate 63 such as a printed circuit board or a resin substrate, for example, by solder connection, brazing welding, a conductive adhesive, or the like. The igniter section 6 does not conduct unless the discharge lamp 1 is mounted, and thus has a safety function for preventing a high voltage from being generated when the discharge lamp 1 is not mounted.

  The secondary winding of the pulse transformer 62 generates a high pulse voltage and is disposed near the socket 5. Thereby, since the transmission path on the way is short, it is possible to minimize the insulation distance and the like for preventing the corona voltage that is secondarily generated when the pulse voltage is generated.

  Further, as shown in FIG. 3, the igniter section 6 includes a filter section 64 on the input side (lighting circuit section 7 side). The filter unit 64 includes a capacitor 640, an inductor (filter choke) 641, a capacitor 642, and two capacitors (filter capacitors) 643 and 644 in order from the lighting circuit unit 7 side. A portion having a ground potential therebetween and the case 4 (see FIG. 1) are electrically connected. Thereby, the igniter section 6 has an electromagnetic shield structure, and can reduce noise in the FM band and the TV band generated from the discharge lamp 1 when the lamp current is inverted in polarity without using an expensive noise shield line. The capacitors 640, 642, 643, 644 and the inductor (filter choke) 641 are mounted on the substrate 63 (see FIG. 1) by, for example, solder connection, brazing welding, conductive adhesive, or the like.

  As shown in FIG. 3, the lighting circuit unit 7 includes an input coupler 76 (power supply port), an input filter unit 7a, a DC / DC converter unit 7b, and an inverter unit in this order from the DC power supply (not shown) side. 75 and the control part 8 are provided, and lighting of the discharge lamp 1 is controlled stably. The DC power supply supplies a DC voltage of 12V, for example.

  As shown in FIG. 1, the input coupler 76 is attached to the opening 42 a on the lower surface 42 of the case 4 and outputs a DC voltage supplied from a DC power supply (not shown) to a plurality of electronic components. The input filter part 77a includes input electrolytic capacitors 72 and 73 as shown in FIG. The DC / DC converter unit 7 b includes a MOSFET 70 and a main transformer 74, and converts a DC voltage supplied from the DC power source into a voltage suitable for stable lighting of the discharge lamp 1. The inverter unit 75 is a rectangular wave full bridge module, and converts the voltage input from the DC / DC converter unit 7b into a substantially rectangular wave AC voltage. The inverter unit 75 is connected to the igniter unit 6.

  When housing the lighting circuit unit 7 in the case 4, as shown in FIG. 1, the heat generating components such as the MOSFET 70 and the diode 71 are exposed to the outside of the lamp body 20 on the side opposite to the socket 5 (right side in FIG. 1). It is provided as follows. The input electrolytic capacitors 72 and 73, the main transformer 74, and the inverter unit 75 are provided on the socket 5 side (left side in FIG. 1). The plurality of electronic components are mounted on the substrate 77 by, for example, solder connection, brazing welding, conductive adhesive, or the like. The inverter unit 75 is mounted on the substrate 63 by, for example, solder connection, brazing welding, conductive adhesive, or the like.

  As shown in FIG. 3, the control unit 8 includes a power supply voltage monitoring unit 80, an HF drive circuit unit 81, a VLA detection unit 82, an ILA detection unit 83, a calculation unit 84, and an LF drive circuit unit 85. I have. The power supply voltage monitoring unit 80 detects a DC voltage supplied from a DC power supply (not shown). The VLA detector 82 detects the voltage value of the voltage output from the DC / DC converter unit. The ILA detection unit 83 detects the current value of the current output from the DC / DC converter unit. The calculation unit 84 receives the voltage value and the current value detected by the VLA detection unit 82 and the ILA detection unit 83, and outputs a signal to the HF drive circuit unit 81 so as to have a predetermined power value. The HF drive circuit unit 81 generates a switch signal for controlling the duty and frequency of the MOSFET 70 based on the signal, and outputs the switch signal to the MOSFET 70. In addition, the LF drive circuit unit 85 adjusts the frequency of the inverter unit according to the lighting state of the discharge lamp 1.

  As described above, according to the first embodiment, the case 4 can be set to the same potential as the lamp body 20 to enhance the shielding effect of noise generated from the discharge lamp 1, and between the socket 5, the igniter unit 6, and the lighting circuit unit 7. Since it is not necessary to connect them with a noise shield wire, it is possible to realize cost reduction and size reduction. Further, the attenuation of the pulse voltage in the transmission path from the igniter unit 6 to the discharge lamp 1 can be reduced. Further, it is possible to make it difficult to transmit heat generated from the discharge lamp 1 to the lighting circuit unit 7, and it is possible to effectively release the heat generated from the heat generating component to the case 4 and cool it. Furthermore, since the heat generating component of the lighting circuit portion 7 is provided on the side opposite to the socket 5 (the right side in FIG. 1), the heat dissipating effect of the heat generating component can be enhanced, so that the temperature of the heat generating component can be further increased and is inexpensive. Parts can be used. By directly fixing the case 4 to the lamp body 20, it is not necessary to provide a part for waterproofing between the case 4 and the lamp body 20, so that downsizing can be realized.

  As a modification of the first embodiment, the connection portion may electrically connect the case and the reflection plate. Even if it is such a structure, the effect similar to Embodiment 1 can be acquired.

  As another modification of the first embodiment, the igniter unit may include a separately-excited trigger circuit type semiconductor switch element such as a thyristor instead of the discharge gap in order to generate a pulse voltage. Even with such a configuration, the same effect as in the first embodiment can be obtained, and the upper limit value of the pulse voltage can be limited by the separately excited trigger circuit system, so that the downsizing can be realized. .

(Embodiment 2)
Although the lighting fixture of Embodiment 2 is provided with the discharge lamp 1, the lamp 2, and the discharge lamp lighting device 3 similarly to the lighting fixture (refer FIG. 2) of Embodiment 1, as shown in FIG. There is the following characteristic part which is not in the lighting fixture of Embodiment 1.

  The lighting fixture of Embodiment 2 is provided with an elastic body 9 that is formed in an annular shape and is movable. The elastic body 9 is bonded to the bottom portion 200 at the outer peripheral edge, and is bonded to the reflecting plate 22 at the inner peripheral edge. In addition, the case 4 of the second embodiment is fixed to the reflecting plate 22. As a fixing method, for example, there are a method of fixing by screwing, a method of rotating the case 4 and fitting each fitting portion (not shown), and fixing. In addition, the lighting fixture of Embodiment 2 is the same as that of Embodiment 1 (refer FIG. 1) in points other than the above.

  As described above, according to the second embodiment, the same effects as those of the first embodiment can be obtained, the inside of the lamp body 20 can be waterproofed, and the reflector 22 can be moved when mounted on a vehicle or the like. Thus, the optical axis can be adjusted. Further, the high beam and the low beam can be switched by moving the reflecting plate.

(Embodiment 3)
Although the lighting fixture of Embodiment 3 is equipped with the discharge lamp 1, the lamp 2, and the discharge lamp lighting device 3 similarly to the lighting fixture (refer FIG. 2) of Embodiment 1, as shown in FIG. There are the following characterizing portions that are not included in the lighting apparatus of the first embodiment.

  The lighting fixture of Embodiment 3 is formed in an annular shape, and includes an elastic body 9a that is movable. The elastic body 9a is joined to the bottom portion 200 at the outer peripheral edge and joined to the case 4 at the inner peripheral edge. The case 4 of the third embodiment is fixed to the reflection plate 22. As a fixing method, for example, there are a method of fixing by screwing, a method of rotating the case 4 and fitting each fitting portion (not shown), and fixing. In addition, the lighting fixture of Embodiment 3 is the same as that of Embodiment 1 (refer FIG. 1) in points other than the above.

  As described above, according to the third embodiment, the same effects as those of the first embodiment can be obtained, the inside of the lamp body 20 can be waterproofed, and the reflector 22 can be moved when mounted on a vehicle or the like. Thus, the optical axis can be adjusted. Further, the high beam and the low beam can be switched by moving the reflecting plate.

(Embodiment 4)
As shown in FIG. 6, the discharge lamp lighting device 3 according to the fourth embodiment includes the case 4, the socket 5, the igniter unit 6, and the lighting circuit unit 7 according to the discharge lamp lighting device 3 according to the first embodiment (see FIG. 1). ), But has the following features that are not included in the discharge lamp lighting device 3 of the first embodiment.

  In the discharge lamp lighting device 3 of the fourth embodiment, the lighting circuit unit 7 and the igniter unit 6 are mounted on the same substrate 66. The pulse transformer 62 is disposed so as to be inserted into the substrate 66. The discharge lamp lighting device 3 according to the fourth embodiment is the same as the discharge lamp lighting device 3 according to the first embodiment (see FIG. 1) except for the points described above.

  As described above, according to the fourth embodiment, the same effects as those of the first embodiment can be obtained, and the igniter unit 6 and the lighting circuit unit 7 can be integrated, so that downsizing can be realized.

  As a modification of the fourth embodiment, a discharge lamp lighting device as shown in FIGS. 7 to 9 may be used. In FIG. 7, the pulse transformer 62 is arranged with a position shifted from the socket 5. In FIG. 8, the pulse transformer 62 is inserted into the substrate 66 c and is disposed at a position shifted from the socket 5. In FIG. 9, the positions of the output terminals 50 and 51 are different. Even if it is such a structure, the effect similar to Embodiment 4 can be acquired.

(Embodiment 5)
As shown in FIG. 10, the discharge lamp lighting device 3 according to the fifth embodiment includes the case 4, the socket 5, the igniter unit 6, and the lighting circuit unit 7 according to the discharge lamp lighting device 3 according to the first embodiment (see FIG. 1). ), But has the following features that are not included in the discharge lamp lighting device 3 of the first embodiment.

  In the discharge lamp lighting device 3 according to the fifth embodiment, the lighting circuit unit 7 includes a substrate 78 in which the primary winding 740 and the secondary winding 741 of the main transformer 74 are wired. In addition, the discharge lamp lighting device 3 of Embodiment 5 is the same as the discharge lamp lighting device 3 of Embodiment 1 (see FIG. 1) in points other than the above.

  As described above, according to the fifth embodiment, the same effect as that of the first embodiment can be obtained, and the primary winding 740 and the secondary winding 741 of the main transformer 74 can be wired in the substrate 78, so that the size can be reduced. Can be realized.

  As a modification of the fifth embodiment, as shown in FIG. 11, a primary winding 620 and a secondary winding 621 of a pulse transformer 62, and a primary winding 740 and a secondary winding 741 of a main transformer 74 are mounted on a substrate 78a. You may wire in. Even if it is such a structure, the effect similar to Embodiment 5 can be acquired.

(Embodiment 6)
Although the lighting fixture of Embodiment 6 is provided with the discharge lamp 1, the lamp 2, and the discharge lamp lighting device 3 similarly to the lighting fixture (refer FIG. 2) of Embodiment 1, as shown in FIG. There is the following characteristic part which is not in the lighting fixture of Embodiment 1.

  In the luminaire of Embodiment 6, the discharge lamp lighting device 3 is housed inside the lamp body 20. The interior of the lamp body 20 has a non-waterproof structure. In addition, the lighting fixture of Embodiment 6 is the same as that of Embodiment 1 (refer FIG. 1) in points other than the above.

  As described above, according to the sixth embodiment, it is possible to obtain the same effect as that of the first embodiment and to achieve downsizing. Moreover, it is not necessary to make the inside of the lamp body 20 waterproof, and it may be non-waterproof.

  As a modification of the sixth embodiment, as shown in FIG. 13, the case 4 and the reflection plate 22 may be electrically connected by a connection portion 41. Even if it is such a structure, the effect similar to Embodiment 6 can be acquired.

It is sectional drawing of the discharge lamp lighting device and discharge lamp of Embodiment 1 by this invention. It is sectional drawing of a lighting fixture same as the above. It is a circuit diagram of a discharge lamp lighting device same as the above. It is sectional drawing of the lighting fixture of Embodiment 2 by this invention. It is sectional drawing of the lighting fixture of Embodiment 3 by this invention. It is sectional drawing of the discharge lamp lighting device and discharge lamp of Embodiment 4 by this invention. It is sectional drawing in the other discharge lamp lighting device and discharge lamp same as the above. It is sectional drawing in the other discharge lamp lighting device and discharge lamp same as the above. It is the other discharge lamp lighting device and discharge lamp same as the above, (a) is sectional drawing from a side surface, (b) is sectional drawing from the front. It is sectional drawing of the discharge lamp lighting device and discharge lamp of Embodiment 5 by this invention. It is sectional drawing in the other discharge lamp lighting device and discharge lamp same as the above. It is sectional drawing of the lighting fixture of Embodiment 6 by this invention. It is sectional drawing in the other lighting fixture same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Discharge lamp 4 Case 40 Left side surface 40a Opening 41 Connection part 5 Socket 6 Igniter part 7 Lighting circuit part

Claims (12)

A socket for mounting a discharge lamp,
An igniter for starting the discharge lamp by supplying a pulse voltage to the discharge lamp;
A lighting circuit unit for controlling lighting of the discharge lamp ;
To position the igniter portion closer than the lighting circuit unit to the front Symbol socket, said socket, and a case for housing the igniter unit and the lighting circuit unit,
At least one of a reflector provided around the discharge lamp and a lamp main body for housing the reflector and the case is formed of a conductive material and electrically connected to the discharge lamp lighting device. .   The discharge lamp lighting device according to claim 1, wherein the igniter unit includes a filter unit that electrically connects a portion having a ground potential to the case.   The discharge lamp lighting device according to claim 1, wherein the lighting circuit unit includes a heat generating component on a side opposite to the socket side.   The discharge lamp lighting device according to claim 3, wherein the heat generating component is exposed to the outside of the lamp body.   The discharge lamp lighting device according to any one of claims 1 to 4, wherein the igniter unit includes a separately-excited trigger circuit type semiconductor switch element for generating the pulse voltage.   The discharge lamp lighting device according to claim 1, wherein the lighting circuit unit and the igniter unit are mounted on the same substrate. At least one of the igniter section and the lighting circuit section is
A transformer,
The discharge lamp lighting device according to any one of claims 1 to 6, further comprising: a substrate on which a winding of the transformer is wired. The discharge lamp lighting device according to any one of claims 1 to 7,
A discharge lamp controlled by the discharge lamp lighting device;
A reflector provided around the discharge lamp;
A lighting fixture comprising: a lamp body that houses the reflecting plate therein.   The lighting device according to claim 8, wherein the case is fixed to the lamp body. The case is fixed to the reflector;
The lighting fixture according to claim 8, further comprising a movable elastic body formed in an annular shape and joined to the lamp body at an outer peripheral edge and joined to the reflecting plate at an inner peripheral edge. The case is fixed to the reflector;
The lighting fixture according to claim 8, further comprising a movable elastic body formed in an annular shape and joined to the lamp body at an outer peripheral edge and joined to the case at an inner peripheral edge.   The lighting device according to claim 8, wherein the case is housed in the lamp body.

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