JP4285295B2 - Discharge lamp starting device, discharge lamp lighting device, vehicle headlamp apparatus, and vehicle - Google Patents

Description

  The present invention relates to a discharge lamp starting device, a discharge lamp lighting device, a vehicle headlamp, and a vehicle.

  Conventionally, a discharge lamp starting device having a circuit configuration as shown in FIG. 28 has been provided. The discharge lamp starting device A applies a high-pressure pulse to the discharge lamp La to start a discharge lamp La such as a metal halide lamp, and includes a charging capacitor C1 connected between input terminals t11 and t13, A series circuit of the primary winding n1 of the pulse transformer PT and the discharge gap SG connected in parallel to the charging capacitor C1, and the secondary winding of the pulse transformer PT connected between the input terminal t11 and the output terminal t21. n2. The output terminal of the inverter circuit INV is connected to the input terminals t11 to t13, and the discharge lamp La is connected between the output terminals t21 and t22. Further, the input terminal t13 and the output terminal t22 are short-circuited.

  Here, when the charging current is supplied from the inverter circuit INV to the charging capacitor C1 through the input terminals t11 and t13 at the time of starting the lamp, and the voltage across the charging capacitor C1 reaches a predetermined voltage, the discharge gap SG is discharged. A current flows through the primary winding n1 of the pulse transformer PT, a high-pressure pulse is generated in the secondary winding n2, and the high-pressure pulse is applied to the discharge lamp La connected between the output terminals t21 and t22 to discharge the discharge lamp La. Is started.

  In recent years, high-intensity discharge lamps such as metal halide lamps have been used for automobile headlamps, and in such headlamp fixtures, the storage space for the appliance is limited, so a socket for mounting the discharge lamp La is used. In the past, a discharge lamp starting device has been proposed in which the above-described circuit for applying a high-pressure pulse to the discharge lamp La is housed (see, for example, Patent Document 1).

  FIG. 29 is an external view of such a discharge lamp starting device, and the outer shell of the socket body 50 is composed of an upper cover 50a and a lower cover 50b, and a high pressure housed inside from an insulating cylinder 50c provided on the upper cover 50a. The socket port 51 of the pulse generator 54 is exposed. The socket body 50 is provided with a connector 52 for connecting an electric wire from the inverter circuit INV. The connector 52 is provided with three connection terminals 53 constituting the input terminals t11 to t13. Yes.

  FIG. 30 (c) shows the appearance of the high-voltage pulse generator 54 accommodated in the socket body 50. A socket port 51 is provided at a position facing the insulating cylinder 50c of the upper cover 50a, and the pulse transformer PT, discharge Circuit parts such as the gap SG and the charging capacitor C1 are mounted to form a circuit that generates a high-voltage pulse. The socket mouth 51 has a cylindrical outer tube portion 63 into which a columnar cap 70 of the discharge lamp La is fitted, and a cylindrical inner tube portion engaged with a recess in which the bottom surface of the cap 70 is recessed in a circle. 64 is formed concentrically, and an inner electrode 65 for electrical connection with a center electrode (not shown) disposed in a recess on the bottom surface of the base 70 is disposed inside the inner cylindrical portion 64, An outer electrode 66 for electrically connecting to the outer peripheral electrode 71 provided on the upper portion of the peripheral surface of the base 70 is disposed in the outer cylindrical portion 63. In the assembled state, the insulating cylinder 50c of the upper cover 50a is disposed on the outer periphery of the outer cylindrical portion 63, and the insulating cylinder 50c is disposed outside the outer electrode 66 to ensure insulation.

The high voltage pulse generator 54 is assembled in the following procedure. That is, the secondary winding n2 and the primary winding n1 made of a rectangular wire are edgewise wound around the outer periphery of a rod-shaped ferrite core 55 having an elliptical cross section (see FIG. 30A). The connection terminals 56 and 57 are electrically connected to both ends 67a and 67b of n1, and the connection terminals 58 and 59 are electrically connected to both ends 68a and 68b of the secondary winding n2, respectively. Is formed (see FIG. 30B). After that, the transformer block 60 is sealed with another resin to form the main body 61 integrally including the socket port 51, and circuit components such as the discharge gap SG and the charging capacitor C1 are attached to assemble the high voltage pulse generator 54. To complete.
JP 2002-2107050 A

  In the discharge lamp starting device configured as described above, the pulse transformer PT that generates high voltage is sealed with resin to form the transformer block 60, and then the transformer block 60 is sealed with another resin to form the socket body 61. Since the high voltage portion is double sealed and insulated, an interface is formed between the resin that seals the pulse transformer PT and the resin that forms the socket body 61, and the secondary is transmitted along this interface. There is a possibility that a high voltage leaks between the connection terminal 58 on the side and the connection terminal 57 on the primary side. Therefore, in order to ensure the creepage distance between both terminals 57 and 58, it is necessary to form a plurality of concave grooves 62 on the surface of the transformer block 60 to provide a concave and convex shape. When such a concave and convex shape is formed, The thickness of the resin that seals the transformer block 60 has to be increased, which hinders downsizing.

  A connection terminal 58 provided at one end of the secondary winding n2 of the pulse transformer PT is connected to a center electrode provided at the center of the bottom surface of the base of the discharge lamp La, and a high-voltage pulse generated by the pulse transformer PT is received. Although it is applied to the center electrode of the discharge lamp La, a cylindrical shape is provided between the connection terminal 58 and the outer peripheral electrode in order to ensure an insulation distance between the outer peripheral electrode provided on the peripheral surface of the base part. The inner cylinder part 64 and the outer cylinder part 63 are provided twice. Here, the inner cylindrical portion 64 provided in the socket mouth 51 is fitted into the recess on the bottom surface of the base 70 to ensure a creepage distance, but the inner cylindrical portion 64 of the inner cylindrical portion 64 is fitted to the concave portion on the bottom surface of the base 70. Since the height needs to be increased to some extent, and the socket 51 and the transformer block 60 are arranged so as to partially overlap in a plane orthogonal to the mounting direction of the discharge lamp La, the mounting direction of the discharge lamp La However, the thickness dimension of the socket body 50 is large, and there is a problem that the demand for thinning cannot be satisfied.

  In addition, the pulse transformer PT is thinned by making the cross-sectional shape of the ferrite core 55 into an oval shape. However, when winding a rectangular wire edgewise, the pulse transformer PT has a corner portion where the radius of curvature is the smallest in the cross-section of the ferrite core 55. Further, since the elongation rate of the insulating resin of the rectangular wire becomes large or the insulating film is broken and it becomes difficult to ensure insulation, there is a limit to making the ferrite core 55 thinner, and the socket body 50 is made thinner. It was a restriction.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide a small discharge lamp starting device, a discharge lamp lighting device, a vehicle headlamp apparatus, and a vehicle with improved insulation performance. is there.

The invention according to claim 1 has a cylindrical socket port to which a cylindrical cap of a discharge lamp is mounted, and an inner electrode for electrically connecting to a center electrode provided on the bottom surface of the cap is the socket port. A socket portion made of a synthetic resin molded product arranged at the bottom of the lamp and a first winding are wound around and arranged in the vicinity of the outer periphery of the socket opening in a plane substantially perpendicular to the mounting direction of the discharge lamp. A first magnetic core, a conductive portion that electrically connects one end of the first winding and the inner electrode, and the socket portion are integrally molded with one type of synthetic resin to form the first magnetic The core, the first winding, and the conductive portion are sealed with a resin, and the first portion is wound around an outer surface of the sealing portion where the first winding is sealed. A second winding constituting a pulse transformer for giving a starting pulse to the discharge lamp together with a winding of Wherein the second winding, characterized in that at least a portion is wound in a direction oblique to the direction perpendicular to the longitudinal direction of the first magnetic core.

  According to the present invention, the first winding wound around the first magnetic core and the conductive portion that electrically connects one end of the first winding and the inner electrode are resin-sealed. A pulse transformer that forms a sealing portion and winds a second winding around an outer surface of a portion of the sealing portion that seals the first winding and applies a starting pulse to the discharge lamp together with the first winding. Since the first winding and the conductive part are sealed with one type of resin, the interface between the two types of resin is formed as in the case of sealing with two types of resin as in the past. Therefore, it is possible to prevent the occurrence of electric leakage, and therefore it is not necessary to provide an uneven shape on the surface of the sealing resin as in the prior art, so the sealing part can be made smaller and a compact discharge lamp with improved insulation can be started. An apparatus can be provided. In addition, since the first magnetic core is disposed in the vicinity of the outer periphery of the socket opening in a plane substantially orthogonal to the mounting direction of the discharge lamp, a part of the first magnetic core and the socket opening in the mounting direction of the discharge lamp. There is also an effect that the thickness dimension in the mounting direction of the discharge lamp can be reduced by being superposed. Furthermore, since the second winding is wound in an oblique direction with respect to the direction perpendicular to the longitudinal direction of the first magnetic core, it is higher than when wound in the direction perpendicular to the longitudinal direction. A pulse voltage can be generated.

  According to a second aspect of the present invention, in the first aspect, the second winding has a winding interval wider on the side farther from the outer periphery of the socket port than on the side closer to the outer periphery of the socket port. .

  According to the present invention, the overlapping region between the first winding and the second winding can be increased to increase the degree of coupling, and the primary-side vibration current transmission loss is reduced immediately after the discharge lamp is turned on. .

  According to a third aspect of the present invention, in the first or second aspect, the sealing portion is provided with an uneven portion that guides the second winding on an outer periphery.

  According to the present invention, by improving the positional accuracy between the first winding and the second winding, stable coupling accuracy can be obtained, and high reliability can be ensured.

  A fourth aspect of the present invention is characterized in that, in the first aspect, the sealing portion is provided with a tapered portion on an outer periphery around which the second winding is wound.

  According to the present invention, productivity can be improved without increasing the outer shape.

  According to a fifth aspect of the present invention, in the fourth aspect, the taper portion has a plate shape with a predetermined thickness or less.

  According to the present invention, by limiting the thickness of the tapered portion, it is possible to mold without generating an air layer in the tapered portion, and high insulation can be ensured.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the extension line in the winding direction of the second winding does not interfere with the socket portion.

  According to the present invention, it is possible to improve the positional accuracy and productivity of the first winding and the second winding.

  A seventh aspect of the invention is characterized in that, in any one of the first to sixth aspects, a second magnetic core is provided outside the sealing portion in parallel with a longitudinal direction of the first magnetic core.

  According to the present invention, the pulse voltage generated in the first winding is increased by increasing the degree of coupling between the first winding and the second winding without increasing the thickness of the first magnetic core. Can be planned.

  The invention of claim 8 is characterized in that, in claim 7, a fixing portion for holding and fixing the second magnetic core is provided on the outer surface of the sealing portion.

  According to this invention, by improving the assemblability, the number of processing steps can be reduced, and a fixing member such as an adhesive becomes unnecessary.

  A ninth aspect of the present invention is characterized in that, in the seventh or eighth aspect, the second magnetic core is longer than an overlapping portion of the first winding and the second winding.

  According to the present invention, the pulse voltage generated in the first winding can be further increased, and the transmission loss of the primary side oscillating current is reduced immediately after the discharge lamp is turned on.

  A tenth aspect of the present invention provides the method according to any one of the seventh to ninth aspects, wherein the second magnetic core includes a conductive metal that covers the device, and the second magnetic core is a distance from the central axis of the first magnetic core to the metal. Is arranged in the shortest space.

  According to the present invention, the magnetic flux that causes eddy current loss in the metal can be efficiently recovered by the second magnetic core, and the degree of coupling between the first winding and the second winding can be improved.

  An eleventh aspect of the present invention is that, in the seventh aspect, the second magnetic core includes a first surface parallel to a longitudinal direction of the first magnetic core, and the first surface bent by the first surface. It is a silicon steel plate formed in an L-shape comprising a second surface having an end close to the side surface of the first magnetic core on which the other end of the winding is wound.

  According to this invention, since the magnetic flux orthogonal to the thickness direction of the silicon steel sheet can be reduced, eddy current loss is reduced, and the degree of coupling between the first winding and the second winding can be increased.

  A twelfth aspect of the invention is characterized in that, in any one of the first to eleventh aspects, a protrusion for binding the second winding end is provided on a side surface of the sealing portion.

  According to the present invention, since the bonding step for fixing the end of the second winding can be omitted, the number of processing steps can be reduced. In addition, since the drawing direction of the second winding end is defined, it is possible to prevent deterioration in assemblability due to variations in the position of the second winding end and the drawing direction.

  A thirteenth aspect of the invention is characterized in that, in any one of the first to eleventh aspects, a groove for press-fitting and holding the second winding end is provided on a side surface of the sealing portion.

  According to the present invention, since the bonding step for fixing the end of the second winding can be omitted, the number of processing steps can be reduced. In addition, since the drawing direction of the second winding end is defined, it is possible to prevent deterioration in assemblability due to variations in the position of the second winding end and the drawing direction.

  A fourteenth aspect of the present invention includes the lead frame according to the twelfth or thirteenth aspect, wherein the lead frame is mounted with a start circuit that generates a start pulse in the first winding by energizing the second winding. Terminals connected to both ends of the windings are provided on the lead frame.

  According to this invention, even when the shape of the sealing portion is complicated and the second winding connection terminal cannot be attached to the sealing portion, the connection at the time of assembly can be easily performed.

  A fifteenth aspect of the invention includes the lead frame according to the twelfth or thirteenth aspect, wherein the lead frame includes a start circuit that generates a start pulse in the first winding by energizing the second winding. Each of the windings has a predetermined diameter or more, and holes for inserting and connecting both ends of the second winding are formed in the lead frame.

  According to the present invention, the terminal for connecting the second winding becomes unnecessary, and the cost can be reduced.

  A sixteenth aspect of the present invention provides the lead frame according to any one of the first to eleventh aspects, wherein the lead frame includes a start circuit that generates a start pulse in the first winding by energizing the second winding. A terminal having one end connected to the end of the second winding is provided on a side surface of the sealing portion, and the other end of the terminal is joined to the lead frame.

  According to the present invention, the second winding can be easily connected.

  The invention of a seventeenth aspect is the one according to the sixteenth aspect, characterized in that the terminal is simultaneously molded when the sealing portion is molded.

  According to this invention, the terminal molding process can be omitted, and the number of processing steps can be reduced.

  The invention of claim 18 is characterized in that the discharge lamp starting device according to any one of claims 1 to 17 is used.

  According to the present invention, it is possible to provide a discharge lamp lighting device having the same effects as any one of claims 1 to 17.

  The invention according to claim 19 is characterized in that the discharge lamp lighting device according to claim 18 is used.

  According to this invention, the vehicle headlamp apparatus having the same effects as any one of claims 1 to 17 can be provided.

  The invention of claim 20 is characterized in that the vehicle headlamp apparatus according to claim 19 is used.

  According to the present invention, a vehicle having the same effects as any one of claims 1 to 17 can be provided.

  As described above, in the present invention, the first winding wound around the first magnetic core and the conductive portion that electrically connects one end of the first winding and the inner electrode are made of resin. The sealing portion is formed by sealing, and the second winding is wound around the outer surface of the portion of the sealing portion that seals the first winding, and a starting pulse is applied to the discharge lamp together with the first winding. Since the first pulse winding and the conductive portion are sealed with one type of resin, there are two types of pulse transformers as in the conventional case of sealing with two types of resin. It is possible to prevent leakage through the resin interface, so there is no need to provide an uneven shape on the surface of the sealing resin as in the past, so the sealing part can be made smaller and the insulation is improved. The discharge lamp starting device can be provided. In addition, since the first magnetic core is disposed in the vicinity of the outer periphery of the socket opening in a plane substantially orthogonal to the mounting direction of the discharge lamp, a part of the first magnetic core and the socket opening in the mounting direction of the discharge lamp. There is also an effect that the thickness dimension in the mounting direction of the discharge lamp can be reduced by being superposed. Furthermore, since the second winding is wound in an oblique direction with respect to the direction perpendicular to the longitudinal direction of the first magnetic core, it is higher than when wound in the direction perpendicular to the longitudinal direction. There is also an effect that a pulse voltage can be generated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
Embodiment 1 of this invention is demonstrated based on FIGS. The discharge lamp starting device A of the present embodiment applies a high-pressure pulse to the discharge lamp La to start a discharge lamp La such as a metal halide lamp, and includes a high-pressure block 1, a low-pressure circuit block 2, and an upper surface resin. The cover 3, the lower surface resin cover 4, the upper surface shield cover 5, and the lower surface shield cover 6 are included as main components. The discharge lamp starting device A of the present embodiment has almost the same circuit configuration as the discharge lamp starting device shown in FIG. 28 described in the prior art, and in the present embodiment, in the circuit of FIG. A bypass capacitor C2 forming a bypass loop is connected between the input terminals t11 and t12.

FIG. 2 shows a manufacturing process of the high-voltage block 1. The high-pressure block 1 has a rod-shaped rod-shaped ferrite core 7 having a specific resistance of 10 ³ Ωm or more and a side surface of the ferrite core 7 as an insulating member. A first winding 8 (secondary winding n2) in which a rectangular wire is edgewise wound in one layer without using a bobbin, a high-voltage yoke 40 formed into a rectangular plate shape from a magnetic material, and a ferrite core 7 And a core holder 10 made of a resin molded product that holds the high-pressure yoke 40, and two terminals 11 and 12 that are attached to the core holder 10 and electrically connected to both ends of the first winding 8. In the present embodiment, the first winding 8 is wound directly around the ferrite core 7, but the first winding 8 may be wound using a bobbin.

  The core holder 10 is disposed so as to face the ferrite core 7 in the longitudinal direction and has a pair of side walls 13 and 13 having a holding groove 13a opened on the upper side in the figure, and is disposed along the longitudinal direction of the ferrite core 7 so as to be disposed on both side walls. 13 is formed integrally with a pair of connecting pieces 14 for connecting the lower end portions of each of 13, a bridging portion 15 for bridging between the pair of connecting pieces 14, and one side wall 13. And a substantially box-shaped yoke housing portion 16 having both side surfaces opened in the longitudinal direction.

  The terminal 11 has a U-shaped sandwiching piece 11a into which the low-voltage end 8a of the first winding 8 is inserted. The press-fitting piece 11b formed integrally with the sandwiching piece 11a is connected to the end 11a. The core holder 10 is fixed to the core holder 10 by press-fitting into a press-fitting hole 17 provided in a portion (side wall 13) of the core holder 10 disposed in the vicinity of 8a. The terminal 12 has a U-shaped sandwiching piece 12a into which the high-voltage side end 8b of the first winding 8 is inserted, and the press-fitting piece 12b formed integrally with the sandwiching piece 12a is connected to the end 12b. The core holder 10 is fixed to the core holder 10 by press-fitting into a press-fitting hole 18 provided in a portion (yoke housing portion 16) of the core holder 10 disposed near the portion 8b.

  In assembling the high-pressure block 1 as described above, first, the press-fitting pieces 11 b and 12 b of the terminals 11 and 12 are press-fitted into the press-fitting holes 17 and 18 of the core holder 10 to hold the terminals 11 and 12, and the yoke storage portion 16. After inserting the high-pressure yoke 40 from above into the core holder 10 and holding and holding the high-pressure yoke 40 in the core holder 10, the end of the ferrite core 7 is inserted into the holding groove 13 a provided in each side wall 13 from above, respectively. The core 7 is held by the core holder 10. At this time, the nail | claw 13b provided in the opening edge of each holding groove | channel 13a latches to the edge part of the ferrite core 7, and the retaining of the ferrite core 7 is performed. Further, a high-pressure yoke 40 is disposed so as to face one end face in the longitudinal direction of the ferrite core 7.

  Then, after holding the ferrite core 7 and the high-pressure yoke 40 on the core holder 10, a sealing portion 19 is formed by resin sealing with an insulating synthetic resin, and the first winding is formed on the surface of the sealing portion 19. The second winding 9 (primary winding n1) is wound so as to be disposed on the outer periphery of the coil 8 (see FIG. 3C), and the first and second windings 8, 9 and the ferrite core 7 A pulse transformer PT that generates a high-voltage pulse is configured. Here, the winding part 19a around which the second winding 9 of the sealing part 19 is wound is formed in a substantially elliptical rod shape, and the high voltage side of the winding part 19a (the high voltage of the second winding 8). Side end 8b side) is disposed so as to contact the outer periphery of the socket port 20a. When the sealing portion 19 is resin-molded, the socket portion 20 having the socket opening 20a to which the base 70 of the discharge lamp La is attached is formed of the molding resin of the sealing portion 19, and the sealing portion 19 The socket portion 20 constitutes a main body portion 21 of the high-pressure block 1.

  The socket port 20a is formed with a cylindrical inner tube portion 23 that fits into an annular groove provided on the bottom surface of the cap 70 inside the cylindrical outer tube portion 22 that fits with the outer peripheral surface of the cap 70. Two cylindrical portions 22 and 23 are arranged concentrically. The tip of the connection piece 12c provided on the terminal 12 is exposed at the bottom of the inner cylinder portion 23, and the inner electrode 24 having a resilient spring piece protruding in a direction in which the tips approach each other is electrically connected to the connection piece 12c. Connected. That is, the inner electrode 24 that is electrically connected to the center electrode of the discharge lamp La is electrically connected to the high-voltage end 8 b of the first winding 8 via the terminal 12.

  The tip of the press-fitting piece 11b of the terminal 11 electrically connected to the end 8a on the low-pressure side protrudes outward from the surface of the sealing part 19, and the tip of the press-fitting piece 11b protruding outward is connected. It becomes the terminal 11c. A pair of outer electrodes 25 that are electrically connected to outer peripheral electrodes provided on the peripheral surface of the base 70 are disposed outside the outer cylindrical portion 22. Each outer electrode 25 includes two elastic contact spring portions 25a that protrude inward from a notch 22a provided at the opening edge of the outer cylindrical portion 22 and elastically contact the outer peripheral electrode. It is fixed to the socket port 20a by press-fitting the press-fitting piece 25b into the upper surface side (not shown). The tip of the press-fitting piece 25b passes through the press-fitting hole and projects to the lower surface side of the socket port 20a, and the tip projecting outward serves as a terminal piece for electrical connection to the low-voltage circuit block 2. .

  On the other hand, as shown in FIGS. 3A and 3B, the low-voltage circuit block 2 includes a charging capacitor C1, a bypass capacitor C2, a discharging gap SG, a connector CN and the like on a substrate 36 formed by insert molding of a lead frame. A starting circuit is formed by mounting circuit components, and generates a starting pulse in the first winding 8 by energizing the second winding 9. The low-voltage circuit block 2 may be configured by mounting each of the circuit components on a substrate made of a printed wiring board.

  As shown in FIG. 4A, the upper surface resin cover 3 is formed in a rectangular parallelepiped shape whose lower surface is opened by an insulating synthetic resin, and an insulating cylinder 26 disposed on the outer periphery of the socket port 20a is formed on the upper surface. In addition, a notch 27 for inserting the connector CN is formed by recessing the opening edge on one side in a rectangular shape. The insulating cylinder 26 is formed with a plurality of guide grooves 28 whose one ends are opened upward along the circumferential direction, and guide pins provided on the peripheral surfaces of the cap 70 of the discharge lamp La in the guide grooves 28. (Not shown) is engaged. Further, the lower surface resin cover 4 is formed of an insulating synthetic resin, and a collar portion 30 protrudes upward from the peripheral edge portion of the rectangular plate-shaped main portion 29.

  On the other hand, as shown in FIG. 5A, the upper shield cover 5 is formed in a rectangular parallelepiped shape whose lower surface is opened by a conductive material such as metal, and the upper surface has a cylindrical shape surrounding the insulating cylinder 26 of the upper resin cover 3. The cylindrical portion 31 is formed. The lower shield cover 6 is formed of a conductive material such as metal, and the side portion 33 projects upward from the peripheral edge of the rectangular plate-shaped main portion 32. A rectangular recess for inserting the connector CN is formed at the joining portion of the upper shield cover 5 and the lower shield cover 6, and the upper and lower surfaces of the connector CN are formed laterally from the periphery of these notches. Cover portions 34 and 35 are respectively extended.

  Thus, when assembling the discharge lamp starting device A, first, as shown in FIG. 3 (c), the high voltage block 1 is placed on the upper side of the low voltage circuit block 2, and both ends of the second winding 9 are connected to the low pressure circuit. After electrically connecting to the connection piece 37 provided in the circuit block 2 and connecting both ends of the second winding 9 to one end of the discharge gap SG and one end of the charging capacitor C1, respectively, FIG. As shown in b), the upper surface resin cover 3 and the lower surface resin cover 4 are covered from the upper and lower sides, and the space surrounded by the upper surface resin cover 3 and the lower surface resin cover 4 is filled with an insulating resin such as silicon, and the high pressure block 1 and The low-voltage circuit block 2 is insulated, and the upper shield cover 5 and the lower shield cover 6 are covered from the upper and lower sides as shown in FIGS. 5A and 5B, whereby the assembly of the discharge lamp starting device A is completed.

  And in this embodiment, although the 2nd coil | winding 9 is wound so that it may be arrange | positioned on the outer periphery of the 1st coil | winding 8 on the surface of the winding part 19a, as shown in FIG. The winding 9 is wound not in a direction orthogonal to the longitudinal direction of the ferrite core 7 but obliquely with respect to a direction orthogonal to the longitudinal direction of the ferrite core 7. Thus, a high pulse voltage is generated by the second winding 9 by winding the second winding 9 diagonally.

  As described above, in the present embodiment, the first winding 8 wound around the ferrite core 7 and the end 8b on the high voltage side of the first winding 8 and the inner electrode 24 are electrically connected. The terminal 12 to be connected is resin-sealed to form a sealing portion 19, and the second winding is disposed on the outer surface of the first winding 8 on the surface of the winding portion 19 a of the sealing portion 19. Insulation performance is achieved because the pulse transformer PT is formed by winding 9 diagonally, and no leakage occurs through the interface between the two types of resin as in the conventional example sealed with two types of resin. Can be improved. Further, in the conventional example, in order to improve the insulation performance, the surface of the sealing resin is provided with a concavo-convex shape to ensure the creepage distance. However, in this embodiment, the first winding 8 and the terminal 12 are connected to one type of seal. Since it is formed of a stop resin, there is no resin interface as in the case of sealing with two types of resins, so there is no need to form uneven shapes on the surface of the sealing resin as in the conventional example, and insulation A small discharge lamp starting device A with improved performance can be realized. Further, the high-pressure portion composed of the ferrite core 7 and the first winding 8 and the socket port 20a are arranged so that the high-pressure portion is in the vicinity of the outer periphery of the socket port 20a in a plane substantially orthogonal to the mounting direction of the discharge lamp La. Since the high-pressure portion and the socket port 20a are arranged so as to overlap each other in the mounting direction of the discharge lamp La, the discharge lamp is started in the mounting direction of the discharge lamp La. By reducing the thickness dimension of the device A, the overall size can be reduced.

  By the way, this embodiment applies a high-pressure pulse to the discharge lamp La in order to start the discharge lamp La which consists of a HID lamp like a metal halide lamp, and the block diagram of the discharge lamp lighting device using this embodiment is shown. As shown in FIG. This discharge lamp lighting device includes an inverter INV that converts a DC voltage of a DC power source E into a rectangular wave voltage and supplies the rectangular wave voltage to a discharge lamp La mounted on the discharge lamp starting device A, and a discharge lamp starting device A. .

  FIG. 7 shows an embodiment of a vehicle headlamp apparatus B using the present embodiment. The headlamp apparatus B is disposed in the lamp housing 100 fixed to the vehicle body, and the above-described discharge lamp starting device. A and the reflecting plate 101 are accommodated, and a lens 102 is attached to an opening provided on the front surface of the lamp housing 100. An opening 104 for replacing the discharge lamp La is provided at the rear of the lamp housing 100, and a cap 105 is attached to the opening 104. Further, an inverter INV that operates by receiving a DC power supply from a battery (not shown) is attached to the lower side of the lamp housing 100, and an electric wire 103 from the inverter INV is connected to the discharge lamp starting device A. It is connected to the connector CN. Reference numeral 106 in the figure denotes a connection connector for connecting a power supply line from the battery.

  FIG. 8 shows an embodiment of a vehicle C provided with the above-described vehicle headlamp fixture B. One vehicle headlamp fixture B is attached to each of the left and right sides of the front surface of the vehicle body 110.

(Embodiment 2)
FIG. 9 shows a top view of the high-pressure block 1 constituting the discharge lamp starting device A of the present embodiment. The difference from the first embodiment is that the second winding 9 is on the high-pressure side of the first winding 8. Therefore, the winding angle is increased, and the lower winding interval of the second winding 9 is wider than the upper winding interval. In the second winding 9, the winding distance is wider on the side far from the outer periphery of the socket port 20 a (that is, the lower side in FIG. 9) than on the side closer to the outer periphery of the socket port 20 a (that is, the upper side in FIG. 9). . Therefore, since the overlapping region between the first winding 8 and the second winding 9 is increased as compared with the first embodiment, the degree of coupling between the first winding 8 and the second winding 9 is increased. The transmission loss of the oscillating current on the primary side is reduced immediately after the discharge lamp is turned on.

(Embodiment 3)
FIG. 10 shows a top view of the high-pressure block 1 constituting the discharge lamp starting device A of the present embodiment. The difference from the first embodiment is the outer peripheral surface of the high-pressure block 1 facing the diameter direction of the winding portion 19a. In addition, a plurality of rectangular convex portions 80 are provided in the axial direction, and the second winding 9 is wound by fitting the second winding 9 in the groove 80a between the convex portions 80. 9 is guided along the groove 80a. Therefore, the positional accuracy between the first winding 8 and the second winding 9 is improved as compared with the first embodiment, a stable coupling accuracy can be obtained, and high reliability can be ensured.

(Embodiment 4)
FIG. 11 shows a top view of the high-pressure block 1 constituting the discharge lamp starting device A of the present embodiment. The difference from the first embodiment is that a taper portion 82 is provided on the outer periphery of the winding portion 19a of the high-pressure block 1. The taper portion 82 is formed with an inclined surface in a direction perpendicular to the winding direction of the second winding 9, and the high voltage side of the winding portion 19 a (the high voltage side of the second winding 8). The end portion 8b side) is separated from the outer periphery of the winding portion 19a. Therefore, even if the length of the winding part 19a is shortened by winding the second winding 9 along the taper part 82, the second winding 9 is wound obliquely around the winding part 19a. Easy to do. That is, productivity is improved without increasing the outer shape of the high-pressure block 1.

  Further, a plurality of triangular wave-shaped grooves 82a are formed in the axial direction outside the tapered portion 82, and a plurality of grooves are formed on the outer peripheral surface of the winding portion 19a facing the taper portion 82 in the diameter direction of the winding portion 19a. A sawtooth-shaped convex portion 81 is formed in the axial direction, and the second winding 9 is fitted into the groove portion 82a and the second winding 9 is fitted into the groove portion 81a between the convex portions 81 while winding. It is turning. Therefore, the positional accuracy between the first winding 8 and the second winding 9 is improved as compared with the first embodiment, a stable coupling accuracy can be obtained, and high reliability can be ensured.

(Embodiment 5)
FIG. 12 shows a top view of the high-pressure block 1 constituting the discharge lamp starting device A of the present embodiment. The difference from the first embodiment is that a tapered portion 83 is provided on the outer periphery of the winding portion 19a of the high-pressure block 1. The taper portion 83 is formed with an inclined surface in a direction perpendicular to the winding direction of the second winding 9, and the high voltage side of the winding portion 19 a (the end of the second winding 8 on the high voltage side). As the portion 8b side) is formed, the shape is separated from the outer periphery of the winding portion 19a. Therefore, even if the length of the winding part 19a is shortened by winding the second winding 9 along the taper part 83, the second winding 9 is wound obliquely around the winding part 19a. It becomes easy. That is, productivity is improved without increasing the outer shape of the high-pressure block 1.

  Here, when a large air layer is generated in the resin-molded main body portion 21, corona discharge may occur in the air layer, which may cause insulation deterioration. FIG. 13 shows a cross section taken along the line G1-G1 of the winding portion 19a. As shown, in the present embodiment, the thickness d1 of the tapered portion 83 in the direction orthogonal to the axial direction of the winding portion 19a is 3 mm or less, and by limiting the thickness of the tapered portion 83, the tapered portion 83 has Molding is possible without generating an air layer such as voids, ensuring high insulation.

(Embodiment 6)
FIG. 14 shows a top view of the high-pressure block constituting the discharge lamp starting device of the present embodiment. The difference from the first embodiment is that the extension lines X1, X2 in the winding direction of the second winding 9 are sockets. The second winding 9 does not hit the socket portion 20 when the second winding 9 is wound around the winding portion 19a, so that the winding step does not interfere with the portion 20. Can be simplified. Therefore, the positional accuracy of the first winding 8 and the second winding 9 is improved, and the productivity is improved.

(Embodiment 7)
FIG. 15 shows a cross-sectional view of the discharge lamp starting device A of the present embodiment as viewed from the front. The difference from the first embodiment is that a rectangular shape parallel to the longitudinal direction of the ferrite core 7 in the sealing portion 19 is used. The plate-shaped yoke core 41 is provided above the sealing portion 19. In the first to sixth embodiments, an open magnetic path configuration using only the ferrite core 7 has been proposed, but the upper surface resin cover 3 and the lower surface resin cover 4 are surrounded by a metal for the purpose of reducing the amount of noise emitted to the surroundings. When covered with the upper shield cover 5 and the lower shield cover 6, eddy current loss occurs in the upper shield cover 5 and the lower shield cover 6 due to the leakage magnetic flux, so that the pulse voltage generated in the first winding 8 is reduced. .

  If it is attempted to prevent the pulse voltage from being lowered in a configuration in which the yoke core 41 is not provided, it is necessary to increase the diameter of the ferrite core 7 and hinder downsizing. In this embodiment, however, the yoke core 41 is provided to provide a closed magnetism. By approaching the path configuration, the leakage magnetic flux is reduced, the eddy current loss generated in the upper shield cover 5 and the lower shield cover 6 is reduced, and the drop in the pulse voltage generated in the first winding 8 is prevented. Yes.

  Also, as shown in FIG. 16, if the yoke core 41 is made longer than the winding width of the second winding 9, the degree of coupling between the first winding 8 and the second winding 9 is increased and The pulse voltage generated in one winding 8 can be increased, and the transmission loss of the oscillating current on the primary side is reduced immediately after the discharge lamp is turned on.

  Further, the surfaces of the upper surface shield cover 5 and the lower surface shield cover 6 that are closest to the center of the ferrite core 7 are the back surfaces of the upper surface shield cover 5, and in this embodiment, between the back surface of the upper surface shield cover 5 and the ferrite core 7. Therefore, the magnetic flux that causes eddy current loss in the upper shield cover 5 can be efficiently recovered by the yoke core 41, and the degree of coupling between the first winding 8 and the second winding 9 can be improved. .

(Embodiment 8)
FIG. 17 shows a top view of the high-pressure block 1 constituting the discharge lamp starting device A of the present embodiment. The difference from the seventh embodiment is that a rectangular plate-shaped yoke core 41 is provided in front of the sealing portion 19. Compared to the seventh embodiment, the same effects as in the seventh embodiment can be achieved without increasing the thickness dimension of the discharge lamp starting device A in the mounting direction of the discharge lamp La.

  Also, as shown in FIG. 18, if the yoke core 41 is made longer than the winding width of the second winding 9, the degree of coupling between the first winding 8 and the second winding 9 is increased and The pulse voltage generated in one winding 8 can be increased, and the transmission loss of the oscillating current on the primary side is reduced immediately after the discharge lamp is turned on.

(Embodiment 9)
FIG. 19 shows a perspective view of the high-pressure block 1 constituting the discharge lamp starting device A of the present embodiment. The difference from the eighth embodiment is a cross section for fixing the yoke core 41 to the front surface of the sealing portion 19. The U-shaped yoke core fixing portion 42 is provided. In the eighth embodiment, the yoke core 41 is attached and fixed to the front surface of the sealing portion 19 with an adhesive or the like. Even without using an adhesive or the like, the yoke core 41 can be fixed simply by being inserted between the yoke core fixing portion 42 and the sealing portion 19. Therefore, the assembling property is improved, the number of processing steps can be reduced, and a fixing member such as an adhesive is not necessary.

(Embodiment 10)
FIG. 20 shows a top view of the high-pressure block 1 constituting the discharge lamp starting device A of the present embodiment. The difference from the eighth embodiment is that the yoke core 43 formed of an L-shaped silicon steel plate is used as the sealing portion 19. The yoke core 43 includes a first surface 43a parallel to the longitudinal direction of the ferrite core 7 and a left end side of the first surface 43a (an end portion on the low-voltage side of the second winding 8). 8a side) and a second surface 43b whose end is opposed to the left end surface of the ferrite core 7. By thus forming the yoke core 43 in an L shape, the degree of coupling between the first winding 8 and the second winding 9 is increased.

  However, in the configuration of FIG. 20, since the magnetic flux passing through the ferrite core 7 is orthogonal to the second surface 43b of the yoke core 43, eddy current loss occurs on the second surface 43b, and the first winding 9 The transmission loss of energy to the winding 8 increases.

  Therefore, as shown in FIG. 21, if the left end of the ferrite core 7 is extended to the left and the end portion of the second surface 43b of the yoke core 43 is disposed close to the front side surface, the magnetic flux passing through the ferrite core 7 is the first. 2 enters the yoke core 43 from the end of the second surface 43b, the magnetic flux orthogonal to the second surface 43b is reduced, and the transmission loss of energy from the second winding 9 to the first winding 8 is reduced. Thus, the degree of coupling between the first winding 8 and the second winding 9 is further increased.

  In addition, since the silicon steel plate used for the yoke core 43 is a conductive material, the first winding 8 and the second winding 9 can be coupled to each other while improving the insulation performance by forming the right side which is the high voltage side short. The degree can be increased.

(Embodiment 11)
FIG. 22 is an exploded perspective view of the high-pressure block 1 and the substrate 36 constituting the discharge lamp starting device A of the present embodiment. The difference from the first embodiment is that the end 9a of the second winding 9 is As a means for fixing, a winding fixing portion 44 shown in FIG. 23 is provided.

  After the second winding 9 is wound around the winding portion 19a, when the end 9a is not fixed, when the high voltage block 1 is assembled to the substrate 36, the end 9a of the second winding 9 Since the winding is unwound, a fixing step by bonding or the like is necessary. However, in the present embodiment, the substantially rectangular winding fixing portion 44 in which the groove portion 44a is formed is provided on the front side surface and the rear side surface of the winding portion 19a by integral molding, and the end portion 9a of the second winding 9 is provided in the groove portion 44a. The end 9a of the second winding 9 is fixed in the groove 44a. In FIG. 22, only the winding fixing portion 44 on the front surface of the winding portion 19a is shown, but the winding fixing portion 44 is similarly provided on the rear surface of the sealing portion.

  Conventionally, when the high-voltage block 1 is assembled to the substrate 36, the drawing direction of the end portion 9a of the second winding 9 is forcibly limited due to the variation in position and the variation in the drawing direction of the end portion of the second winding 9. However, in this embodiment, the end portion 9a of the second winding 9 is fixed by the winding fixing portion 44, so that the second winding is fixed. 9 can be inserted into the through hole 36a on the substrate 36 without correcting the pulling direction, and the assemblability is improved. In the present embodiment, an electric wire having a diameter of 0.5 or more is used for the second winding 9 so that the end 9a of the second winding 9 can be directly inserted into the through hole 36a on the substrate 36. Yes.

  Furthermore, as shown in FIG. 24, if a triangular convex portion 44b and a concave portion 44c are formed on each side surface of the groove portion 44a of the winding fixing portion 44 facing each other, the end portion 9a of the second winding 9 is formed. Is pressed into the concave portion 44c by the convex portion 44b at the time of press-fitting, so that the holding strength is further increased and the pin is securely fixed. In particular, it is effective when a wire rod that is likely to generate springback during winding is used for the second winding 9.

  Further, the second winding 9 may be fixed by being wound around the winding fixing portion 44a without providing the groove fixing portion 44 in the winding fixing portion 44.

Embodiment 12
FIG. 25 shows an exploded perspective view of the high-pressure block 1 and the substrate 36 constituting the discharge lamp starting device A of the present embodiment. The difference from the embodiment 11 is that the second winding 9 is provided on the substrate 36. Since the binding terminal 46 for binding the end 9a of the second winding 9 is connected to the binding terminal 46, the second winding 9 is attached to the substrate 36 by binding the end 9a of the second winding 9 to the binding terminal 46. Electrically connected. This is particularly effective when the shape of the high-voltage block 1 is complicated and the winding fixing portion 44 as in the eleventh embodiment cannot be provided.

  Further, when the diameter of the second winding 9 is small (for example, less than φ0.5), the binding terminal 46 as in this embodiment is effective.

(Embodiment 13)
FIG. 26 shows an exploded perspective view of the high-pressure block 1 and the substrate 36 constituting the discharge lamp starting device A of the present embodiment. The difference from the first embodiment is that the second winding 9 is electrically connected to the substrate 36. As a means for connection, a cylindrical portion 47 formed in the vertical direction and a terminal piece 48 inserted through the cylindrical portion 47 are provided on the front side surface and the rear side surface of the winding portion 19a.

  The upper end of the terminal piece 48 is a binding portion 48a formed in an L shape bent forward, and the second winding 9 is wound around the binding portion 48a. The lower end 48b of the terminal piece 48 is inserted into the through hole 36a on the substrate 36 and joined with solder or the like.

  Therefore, since the binding work of the second winding 9 can be performed above the high-pressure block 1, that is, in the vicinity of the fitting surface of the discharge lamp La, the binding work can be easily performed.

  Moreover, since the cylindrical part 47 and the terminal piece 48 are simultaneously molded at the time of resin molding of the main body part 21 and the press-fitting process of the terminal piece 48 is reduced, the number of processing steps can be reduced.

  In FIG. 27, the second winding is formed by a lead frame 49 formed on the substrate 36. A plurality of sets of lead frames 49 formed opposite to each other in the front-rear direction are provided in the left-right direction. The high voltage block 1 is arranged on the substrate 36 so that the winding portion 19a is positioned between the lead frames 49 of each set, and the upper end of each lead frame 49 of each set is welded. The second winding 9 is formed by electrical connection via the connecting portion 49a. Also in the first to thirteenth embodiments, the second winding 9 may be formed by the lead frame 49 in the same manner as described above, and the first winding 8 and the second winding 9 are positioned using a jig. Since the high voltage block 1 is fixed on the substrate 36, the first winding 8 and the second winding 9 can be easily positioned, and the positional accuracy is improved.

6 is a top view of a high-pressure block showing a winding state of a second winding according to the first embodiment. FIG. It is explanatory drawing explaining the assembly procedure of a high voltage | pressure block. (A) is an exploded perspective view of the low voltage circuit block, (b) is an external perspective view of the low voltage circuit block, and (c) is an external perspective view of the assembled state of the low voltage circuit block and the high voltage block. (A) is an exploded perspective view showing a state before the upper surface resin cover and the lower surface resin cover are combined, and (b) is an external perspective view of the state in which the upper surface resin cover and the lower surface resin cover are combined. (A) is a disassembled perspective view which shows the state before attachment of a shield cover, (b) is an external appearance perspective view of the state which attached the shield cover. It is a block diagram of the discharge lamp lighting device using the same. It is sectional drawing of the vehicle headlamp fixture using the same as the above. It is an external appearance perspective view which can omit a part of vehicle using the same as the above. 6 is a top view of a high-pressure block showing a winding state of a second winding of Embodiment 2. FIG. 6 is a top view of a high-pressure block showing a winding state of a second winding according to Embodiment 3. FIG. 6 is a top view of a high-pressure block showing a winding state of a second winding according to a fourth embodiment. FIG. FIG. 10 is a top view of a high voltage block showing a winding state of a second winding according to a fifth embodiment. It is side surface sectional drawing which shows a winding part same as the above. FIG. 10 is a top view of a high-pressure block showing a winding state of a second winding according to a sixth embodiment. FIG. 10 is a side sectional view showing the configuration of Embodiment 7. It is an external appearance perspective view which shows another structure same as the above. 10 is a top view of a high-pressure block showing the configuration of Embodiment 8. FIG. It is an external appearance perspective view which shows another structure same as the above. 10 is an external perspective view showing a configuration of Embodiment 9. FIG. FIG. 10 is a top view showing the configuration of Embodiment 10. It is a top view which shows another structure same as the above. FIG. 20 is an external perspective view showing a configuration of an eleventh embodiment. It is a perspective view which shows the structure of the winding fixing | fixed part same as the above. It is a perspective view which shows another structure of the coil | winding fixing | fixed part same as the above. It is a disassembled perspective view which shows the state before the assembly of the low voltage circuit block and high voltage block of Embodiment 12. It is a perspective view which shows the structure of the high voltage | pressure block of Embodiment 13. It is an external appearance perspective view of the reference example which shows the structure of a 2nd coil | winding. It is a block circuit diagram of a discharge lamp lighting device using a conventional discharge lamp starting device. It is a disassembled perspective view which shows the state before mounting | wearing a discharge lamp on the same as the above. FIG. 2A is an external perspective view of a pulse transformer, FIG. 2B is an external perspective view of a transformer block, and FIG. 3C is an external perspective view of a high-voltage pulse generator.

Explanation of symbols

7 Ferrite Core 8 First Winding 8b End 9 Second Winding 12 Terminal Piece 19 Sealing Portion 19a Winding Portion 20 Socket Portion 21 Body Portion 24 Inner Electrode

Claims (20)

A composite having a cylindrical socket port to which a cylindrical cap of a discharge lamp is mounted, and an inner electrode for electrical connection with a center electrode provided on the bottom surface of the cap is disposed at the bottom of the socket port A socket part made of a resin molded product, a first magnetic core around which the first winding is wound and arranged in the vicinity of the outer periphery of the socket opening in a plane substantially perpendicular to the mounting direction of the discharge lamp; A conductive portion that electrically connects one end of the first winding and the inner electrode, and the socket portion is integrally formed with one kind of synthetic resin, and the first magnetic core and the first winding A sealing portion that seals a wire and the conductive portion with resin, and the discharge lamp is wound together with the first winding by being wound around an outer surface of a portion that seals the first winding in the sealing portion. And a second winding constituting a pulse transformer for applying a start pulse to the second winding, Line is at least partially, characterized in that the wound obliquely to the direction perpendicular to the longitudinal direction of the first magnetic core discharge lamp starter device. 2. The discharge lamp starter according to claim 1, wherein the second winding has a winding interval wider on the side farther from the outer periphery of the socket port than on the side closer to the outer periphery of the socket port. The discharge lamp starting device according to claim 1, wherein the sealing portion is provided with an uneven portion for guiding the second winding on an outer periphery. The discharge lamp starting device according to claim 1, wherein the sealing portion is provided with a tapered portion on an outer periphery around which the second winding is wound. The discharge lamp starting device according to claim 4, wherein the tapered portion has a plate shape with a predetermined thickness or less. The discharge lamp starting device according to any one of claims 1 to 5, wherein an extension line in a winding direction of the second winding does not interfere with the socket portion. The discharge lamp starting device according to any one of claims 1 to 6, further comprising a second magnetic core provided outside the sealing portion in parallel with a longitudinal direction of the first magnetic core. The discharge lamp starting device according to claim 7, wherein a fixing portion for holding and fixing the second magnetic core is provided on an outer surface of the sealing portion. 9. The discharge lamp starting device according to claim 7, wherein the second magnetic core is longer than an overlapping portion of the first winding and the second winding. 8. A conductive metal covering the apparatus is provided, and the second magnetic core is disposed in a space having the shortest distance from the central axis of the first magnetic core to the metal. The discharge lamp starting device in any one of thru | or 9. The second magnetic core includes a first surface parallel to the longitudinal direction of the first magnetic core, and the other end of the first winding wound around the first surface. 8. The discharge lamp starting device according to claim 7, wherein the discharge lamp starting device is a silicon steel plate formed in an L-shape comprising a second surface having an end close to the side surface of the first magnetic core. The discharge lamp starting device according to any one of claims 1 to 11, wherein a projection for binding the second winding end is provided on a side surface of the sealing portion. The discharge lamp starting device according to any one of claims 1 to 11, wherein a groove portion for press-fitting and holding the second winding end portion is provided on a side surface of the sealing portion. A lead frame mounted with a start circuit for generating a start pulse in the first winding by energizing the second winding, and terminals connected to both ends of the second winding; The discharge lamp starting device according to claim 12 or 13, wherein the discharge lamp starting device is provided. A lead frame mounted with a start circuit for generating a start pulse in the first winding by energizing the second winding, the second winding having a predetermined diameter or more; 14. The discharge lamp starting device according to claim 12, wherein holes for inserting and connecting both ends of the winding are formed in the lead frame. A lead frame mounted with a start circuit for generating a start pulse in the first winding by energizing the second winding, and one end of the second winding on the side of the sealing portion; The discharge lamp starting device according to any one of claims 1 to 11, wherein a terminal connected to an end portion is provided, and the other end of the terminal is joined to the lead frame. The discharge lamp starting device according to claim 16, wherein the terminal is formed at the same time as the sealing portion is formed.   A discharge lamp lighting device using the discharge lamp starting device according to any one of claims 1 to 17.   A vehicle headlamp apparatus using the discharge lamp lighting device according to claim 18.   A vehicle using the vehicle headlamp apparatus according to claim 19.

Images