WO2007132541A1

WO2007132541A1 - High-voltage discharge lamp for vehicle

Info

Publication number: WO2007132541A1
Application number: PCT/JP2006/323507
Authority: WO
Inventors: Masahiro Tsurumi
Original assignee: Masahiro Tsurumi
Priority date: 2006-05-16
Filing date: 2006-11-25
Publication date: 2007-11-22
Also published as: JPWO2007132541A1; WO2007132527A1

Abstract

The structure, in which two lead wires are vertically raised in parallel from a base, has made it difficult to arrange a discharge unit of two light emitting portions at the same position as that of the light emitting unit of the H4-type halogen lamp. In case a vehicle has its halogen lamp replaced by a high-voltage discharge lamp, a problem of an optical misalignment has been encountered by the lamp having the two light emitting portions for a high beam and a low beam. Provided is a high-voltage discharge lamp for vehicle having two gas discharge portions. These two gas discharge portions are arranged in a space above the base such that at least one of lead wires for feeding the gas discharge portions with an electric current is folded back by 180 degrees or bent at its midway.

Description

Specification

High pressure discharge lamp for vehicles

Technical field

[0001] The present invention relates to a high-pressure discharge lamp used in an automotive headlamp.

Background art

In recent years, headlamps for automobiles are energy-saving lamps that generate a small amount of heat and have excellent luminous efficiency, and are becoming high-pressure discharge lamps that can generate light closer to sunlight. High-pressure discharge lamp is a general term for lamps called HID lamp, high-pressure sodium lamp, metal halide lamp, mercury lamp, and discharge lamp.

[0003] These high-pressure discharge lamps generally have a structure in which one gas discharge part as a light emitting part is provided in one lamp. However, in the case of a headlamp for an automobile, a halogen lamp that is not a high-pressure discharge lamp, which has been used in the past, has a lamp having two light emitting parts, a light emitting part for a high beam and a light emitting part for a low beam. The As a typical example of a lamp having two light emitting portions, the structure of an H4 type lamp is shown in FIG. The value of * in Fig. 19 is the length from the pedestal reference plane, and the unit is mm, and the notation such as "/29.5" is the value measured at a distance of 29.5 mm from the pedestal reference plane force. I mean. (a) shows the entire H4 lamp, and (b) is an enlarged view of the vicinity of the high beam and low beam filaments. In the H4 type lamp, filaments for e-beam and filament for low beam are arranged in one lamp. The high beam filament and low beam filament of the H4 lamp are specified as shown in Fig. 13. The high beam and low beam filaments are arranged based on a pedestal force of 28.5 mm (position “e” in (b) in the figure). The filaments for e-beam and e-beam are arranged approximately 1.7mm to 4.5mm from the position e in the pedestal direction. The low beam filament is arranged at a position of approximately 5.5 mm toward the tip of the e-position force lamp. The high beam filament and the low beam filament are located within 0.5mm from the pedestal central axis. The overall size of the lamp (up to the tip of the base power shading paint) must be within 60 mm. Below the low beam filament is a low beam filament. A light-shielding plate for controlling the direction of light emitted from the lamp and a light-shielding coating to prevent the light emitted from the filament from being projected directly forward at the lamp tip!

[0004] As described above, the H4 type halogen lamp has the filaments serving as two light emitting portions in one lamp. Therefore, in order to replace a vehicle lamp using an H4 type halogen lamp with a high-pressure discharge lamp, a high-pressure discharge lamp having two light-emitting parts, that is, a gas discharge part, was required. However, in the high pressure discharge lamp, there is no high pressure discharge lamp having two light emitting parts, that is, a gas discharge part, and it has been impossible to replace the H4 type halogen lamp with a high pressure discharge lamp. Therefore, in Patent Document 1, a high pressure discharge lamp having two light emitting parts in one lamp is devised.

Patent Document 1: Japanese Utility Model Registration No. 3104961

Disclosure of the invention

Problems to be solved by the invention

[0005] The idea described in Patent Document 1 is a structure in which two lead wires are raised in parallel perpendicularly to the pedestal force. Each lead wire stands up in the glass sealing tube. For this reason, the gas discharge part placed on the lead wire can be easily adjusted because the position on the lead wire can be changed with respect to the vertical position. Since the tubes are arranged in parallel, the degree of freedom in the arrangement position is low due to the influence of the cross-sectional diameter of the glass sealing tube.

[0006] FIG. 20 shows the projection direction of the optical axis when the high beam filament (2001) and the low beam filament (2002) emit light in the H4 type halogen lamp. In FIG. 14, some parts are simplified or omitted for the sake of simplicity. (a) shows the state when the single beam filament is made to emit light, and the optical axis is directed downward in the front of the vehicle (direction (1) in the figure). A light shielding plate (2004) is provided below the low beam filament, and a light shielding coating (2006) is provided on the tip of the ultraviolet ray shielding glass tube (2005). (B) shows the state when the e-beam filament is illuminated, and the light projected forward of the vehicle is projected in the direction (2) in the figure. In either case, the light emitted from the filament is projected in the direction of the reflector (2003) at the rear of the vehicle and reflected by the reflector to the front of the vehicle. At this time, the angle of the projected optical axis is determined by the angle of light incident on the reflector and the angle of the reflector. It is. In other words, the light projection direction is determined by the positional relationship between the high-beam and low-beam light emitting units and the reflector for reflecting the light forward.

[0007] Therefore, when replacing the H4 type halogen lamp with a high-pressure discharge lamp, the reflector installed in the vehicle is not replaced, and only the lamp is replaced with a high beam and a low beam of the H4 type halogen lamp. It is necessary to correctly reproduce the position of the filament. If the positions of the high beam and low beam filaments are not reproduced correctly, the optical axis will shift and light cannot be projected in the normal projection direction. Fig. 20 (c) shows an example where the installation position of the low beam filament is shifted. If the low beam filament is displaced upward in the figure, the light emitted from the low beam filament is reflected by the reflector, and the optical axis is higher than the original low beam projection direction (direction (3) in the figure). Shift.

As described above, when replacing the H4 type halogen lamp with the high pressure discharge lamp, a high pressure discharge lamp in which the positions of the high beam and low beam filaments of the H4 type halogen lamp are accurately reproduced is required. However, in the device described in Patent Document 1, it has been difficult to accurately reproduce the filament position of the H4 type halogen lamp specified in FIG.

Means for solving the problem

[0009] Therefore, the present invention provides a high-pressure discharge lamp for a vehicle in which the two gas discharge portions that are light emitting portions can be arranged at the same position as the halogen lamp on the pedestal.

That is, as a first invention, a pedestal, a pedestal force supported by a first lead wire that rises in a vertical direction, a first gas discharge part that is arranged in a substantially central upper space of the pedestal, and a first lead from the pedestal A second lead wire that rises in a vertical direction avoiding the wire and is supported by the second lead wire that folds approximately 180 degrees against the first gas discharge part below, and is mounted on the base on the first gas discharge part. A high-pressure discharge lamp for a vehicle having a second gas discharge part disposed in a substantially central upper space.

[0011] According to a second aspect of the invention, a pedestal, a third gas discharge part that is supported by a third lead wire whose pedestal force also rises in the vertical direction, and is disposed in a substantially central upper space of the pedestal, Is the fourth lead wire that rises in the vertical direction avoiding, and is approximately the height position of the third gas discharge part A fourth gas discharge part supported by a fourth lead wire that is directed upward at the third gas discharge part by bending at a third gas discharge part and disposed in a substantially upper central space on the third gas discharge part. A high pressure discharge lamp is provided.

[0012] As a third invention, there is provided a high pressure discharge lamp for a vehicle, wherein the lead wire is a bifurcated lead wire connected to the pair of electrodes of the gas discharge portion by a bifurcated glass sealing tube.

[0013] As a fourth invention, there is provided a high pressure discharge lamp for a vehicle, wherein the lead wire is a single lead wire connected to the pair of electrodes of the gas discharge portion by a single glass sealing tube.

[0014] A fifth invention is a vehicle high-pressure discharge lamp comprising a discharge bulb body and a pedestal on which the discharge bulb body is arranged, the discharge bulb body comprising a base connected to the pedestal, and a base on the base A glass bulb arranged upright on the glass bulb, two lead wires erecting the base force in the glass bulb, a fifth gas discharge section connected to each of the two lead wires in the glass nozzle, and the fifth A sixth gas discharge part disposed on the opposite side of the base axis when viewed from the gas discharge part force, and the pedestal has the discharge valve body at the center of the fifth gas discharge part, and at the center of the sixth gas discharge part. Between the base axis of the base and the center of both gas discharges is the sum of the distance between the center of both gas discharges and the base axis. Arrange the base to be smaller Providing that the high-pressure discharge electric lamp for a vehicle.

The invention's effect

[0015] The present invention provides a low beam gas discharge unit and a high beam gas discharge at the same position as a conventional halogen lamp when replacing only a conventional halogen lamp power such as an H4 type halogen lamp with a high pressure discharge lamp. And a high-pressure discharge lamp for a vehicle that can reproduce the correct projection direction even after the lamp is replaced.

BEST MODE FOR CARRYING OUT THE INVENTION

[0016] The best mode for carrying out the present invention will be described below. It should be noted that the present invention is not limited to these embodiments, and can be implemented in various modes without departing from the scope of the invention.

[0017] The first embodiment will be described with respect to claims 1, 3, and 4, the second embodiment will be described with respect to claims 2, 3, and 4, and the third embodiment will be described with respect to claims 5, 6, 7, and 8. Embodiment 1>

Embodiment 1 Overview>

[0018] The present embodiment is supported by a first lead wire that rises in the vertical direction of the pedestal force, and is disposed in the upper center of the pedestal, and the vertical rise by avoiding the pedestal force first lead wire. The second lead wire is supported by the second lead wire that is turned 180 degrees toward the first gas discharge portion below, and is composed of a second gas discharge portion that is disposed at the upper portion of the first gas discharge portion and substantially at the center of the pedestal. This is a high-pressure discharge lamp for vehicles. In addition, the first lead wire and the second lead wire pass a current to the gas discharge section through the forked glass sealing tube or the single glass sealing tube.

[0019] The high-pressure discharge lamp for a vehicle according to the present embodiment includes a pedestal, a first gas discharge unit that is supported by a first lead wire that rises in the vertical direction of the pedestal force, and is disposed in a substantially central upper space of the pedestal. A second lead wire that rises in a vertical direction avoiding the first lead wire and is supported by the second lead wire that folds approximately 180 degrees against the first gas discharge portion below and on the first gas discharge portion and The second gas discharge part disposed in the substantially central upper space of the pedestal and the force. FIG. 1 is a conceptual diagram showing an example of a high-pressure discharge lamp for a vehicle according to this embodiment. (a) is a perspective view, and (b) and (c) are views seen from the direction of the arrows shown in (1) and (2) shown in the perspective view. As for the pedestal (0101) force, the first lead wire (0102) and the second lead wire (0103) rise and are connected to the first gas discharge portion (0104) and the second gas discharge portion (0105). Further, the first and second gas discharge portions are disposed in the ultraviolet shielding glass tube (0106).

[0020] As shown in FIG. 1, the high-pressure discharge lamp for a vehicle according to the present embodiment has a first gas discharge part which is a high-beam gas discharge part in the space above the pedestal, and a low beam gas discharge in the upper space. A second gas discharge part, which is a part, is arranged. The base has first and second lead wires and a power terminal (0107) for connecting a power connector of the vehicle body. The power terminals are respectively connected to the first and second lead wires inside the base. Further, the pedestal is provided with a convex portion and a concave portion (0108) for determining the front-rear position and the vertical position of the high-pressure discharge lamp for the vehicle relative to the vehicle body. Convex part and concave part provided on pedestal, base The shape of the seat is classified according to the application and size of the lamp. The pedestal types assumed in this embodiment are HI, H3, H3a, H3c, H3d, H4, H4U, H7, HB3 (9005), 9005J, HB4 (9006) ), 9006J, and 702K types of vehicle lamps. There are various types of pedestals for high-pressure discharge lamps for vehicles, and they are used for headlamps, fog lamps, vehicle width lights, tail lights, and direction indicator lamps.

[0021] The first and second lead wires pass a current to the gas discharge part. The first lead wire sends current to the first gas discharge section, and the second lead wire sends current to the second gas discharge section. The first lead wire rises in the vertical direction of the pedestal force in the UV shielding glass tube, and flows current to the first gas discharge section. On the other hand, the second lead wire rises in the vertical direction from the pedestal outside the ultraviolet shielding glass tube, and passes a current to the second gas discharge part. The first and second lead wires are sealed with a glass sealing tube, but the second lead wire rises outside the glass tube for ultraviolet shielding, so a ceramic or glass tube is used to protect the lead wires. Sometimes it is possible to pay

FIG. 2 is a schematic diagram showing an example of a method for arranging the first lead wire (0201) and the second lead wire (0202). In order to make the drawings easier to see, the shape of the pedestal and the ceramic tube that protects the lead wires are partially omitted. (A) is the same as the high-pressure discharge lamp for vehicles shown in FIG. 1, with two lead wires passing through two fork glass sealing tubes (0204) for each gas discharge part (0203). Standing up from the pedestal. On the other hand, in (b), two lead wires for one gas discharge part rise in the single glass sealing tube (0205) and the pedestal force also rises. Whether to use a bifurcated glass sealing tube or a single glass sealing tube may be determined in consideration of the size of the high-pressure discharge lamp for a vehicle and the influence of a shadow generated by the glass sealing tube. Also, for each lead wire, a single glass sealing tube and a bifurcated glass sealing tube.

FIG. 3 shows an example of the arrangement method of the first lead wire (0301) and the second lead wire (0302). (A) is an example using a bifurcated glass sealing tube (0303) and (b) is a single glass sealing tube (0304). Unlike FIG. 2, in FIG. 3, the second lead wire also stands vertically in the position force that avoids the first lead wire in the ultraviolet shielding glass tube (0 305). First and second The two lead wires do not go out of the UV shielding glass tube, and the second lead wire is folded 180 degrees inside the UV shielding glass tube.

[0024] The first gas discharge part and the second gas discharge part are sealed with glass, and a gas such as xenon or mercury is filled in the sealed glass, and lead wire force is also provided therein. A pair of electrodes for discharging the supplied current is provided. The gas discharge part emits light by discharging between the pair of electrodes. The first and second gas discharge portions are arranged vertically in the upper space of the pedestal. The first gas discharge part and the second gas discharge part are used for lamps with different applications, for example, in a vehicle H4 type lamp, the first gas discharge part is used for a high beam lamp, the second gas discharge part is used for a low beam lamp, etc. Is done. Especially in the H4 lamp, the high-beam lamp and the low-beam lamp need to have a gas discharge section in the space above the pedestal. If the position of the gas discharge part is shifted, the projection angle of the high beam and the low beam will be shifted. In addition to high beam and low beam lamps such as H4 type lamps, it can be used as a spare gas discharge unit when an abnormality occurs in one gas discharge unit, or two gas discharge units can be used to increase brightness. You may do it. The first gas discharge part and the second gas discharge part may be the same gas discharge part that emits the same light, or one of them emits light by downsizing or changing the filling gas. Even a gas discharge part that changes the amount of light and color of light! /.

FIG. 4 shows an enlarged view around the first and second gas discharge portions. The first and second lead wires (0401) extending the pedestal force are attached with molybdenum foil (0402) before being connected to the electrodes of the gas discharge section. The electrode (0403) of the gas discharge part may have either a shape as in (a) or (b) depending on the space in which the gas discharge part is disposed. The shape of (a) is such that when the space A–B shown in the figure can be secured sufficiently, the tips of the pair of electrodes provided at the tips of the molybdenum foil are placed relative to each other, and a discharge occurs between these electrodes. , And fire. When the lamp is small as shown in (b) and the space A–B is not sufficient, the electrodes are placed in parallel, and the tip is discharged to emit light. Alternatively, as shown in (b), molybdenum foils may be arranged in parallel, the electrodes may be bent, and only the tip portions of the electrodes may be opposed.

FIG. 5 shows an example of the arrangement method of the first gas discharge part (0501) and the second gas discharge part (0502). showed that. In (a), the two gas discharge portions are arranged so as to overlap in the same direction in parallel. On the other hand, in (b), the two gas discharge portions are arranged at an angle. Correspondingly, the first lead wire (0503) and the second lead wire (0504) also change the position of rising from the pedestal. The gas discharge part may be arranged in either (a) or (b). These arrangement methods are changed according to the size of the base, the wiring space of the lead wire, and the direction of the optical axis. In the figure, a bifurcated glass sealing tube has been described as an example, but this may be a single glass sealing tube.

[0027] The H4 type lamp requires a light shielding coating at the light shielding plate for the low beam and a light shielding coating at the tip of the glass tube for ultraviolet shielding. The light shielding plate prevents the light emitted from the low beam gas discharge part from being projected upward in front of the vehicle. The light-shielding coating prevents light emitted from the low beam and noise beam gas discharge portions from being projected directly to the front of the vehicle. Figure 6 shows a diagram for explaining the shading plate (0601) and shading coating (0602). (a) represents the direction of the optical axis when the low beam gas discharge section (0603) emits light. As shown in (a), the low beam gas discharge unit projects the emitted light from the low beam gas discharge unit toward the rear of the vehicle and reflects it to the reflector (0604) in which the vehicle lamp is housed. Thus, it is structured to project downward in the front of the vehicle (direction (1) in the figure). Since a light shielding plate is attached below the low beam gas discharge section, no light is projected downward in the low beam gas discharge section. Further, since the ultraviolet shielding glass tube (0605) has a light shielding coating at the tip thereof, the light emitted from the low beam gas discharge part is not directly projected forward of the vehicle. If the light shielding plate and the light-shielding coating are applied, the low beam gas discharge force will be emitted. The emitted light will be projected downward from the low beam gas discharge portion and reflected by the reflector. As shown in (b), light is projected above the front of the vehicle (in the direction (2) in the figure). In addition, since the tip of the ultraviolet ray shielding glass tube is not shaded, the light emitted from the low beam gas discharge force is directly projected to the front of the vehicle (direction (3) in the figure). As shown in (c), the high beam filament (0606) is not attached with a light shielding plate.

[0028] In order to use the high-pressure discharge lamp for a vehicle of the present embodiment for an H4 type lamp, a light shielding plate and a lamp that requires light shielding coating, the cap (0701) shown in Fig. 7 may be used. Figure (2) shows the lateral force with the cap of (1) removed. The side view of only the cap of (1) is (3). The cap is installed outside the ultraviolet shielding glass tube (0702) and shields the projection of light toward the tip of the ultraviolet shielding glass tube and the lower part of the second gas discharge section. This shows the same effect as the shading paint and shading plate of the H4 type lamp, and prevents the light emitted from the low beam gas discharge part (0703) from being projected in unnecessary directions. In addition, an opening (0705) is provided at a position where the high beam gas discharge part (0704) is arranged, and is arranged so as not to block light emitted from the high beam gas discharge part. Yes. In addition, by directly applying a light-shielding paint to the UV-shielding glass tube, it may serve as a light-shielding plate and cap.

Embodiment 1 Specific Example>

FIG. 8 shows a specific example of the vehicle high-pressure discharge lamp shown in the present embodiment. The high-pressure discharge lamp for vehicles in Fig. 6 is a high-pressure discharge lamp for vehicles designed as an H4-type lamp for vehicles. The pedestal (0801) is provided with a power terminal (0802) for connection with a power socket of the vehicle body. From the opposite side of the power terminal, the first lead wire (0804) rises from the inside of the UV shielding glass tube (0803) into the bifurcated glass sealed tube (0808), and the first gas discharge part supported by the first lead wire ( 0805) is arranged at the substantially central part of the base. The second lead wire (0806) protected by the ceramic tube rises from the position outside the UV shielding glass tube and avoids the first lead wire, and the second lead is folded back approximately 180 degrees by pushing downward. The second gas discharge part (0807) is arranged supported by the wire. In addition, a cap (0809) serving as a shading paint and a shading plate is attached.

[0030] The height from the lamp pedestal to the tip of the cap is approximately 54. lmm, and the height from the pedestal force to the power terminal is approximately 21.2 mm. The center of the first gas discharge part is located approximately 24.7 mm from the pedestal, and the center of the second gas discharge part is approximately 31.5 mm from the pedestal. A metal material such as stainless steel, aluminum, and iron is used for the pedestal and the cap, and a resin may be used for the pedestal. The lower part of the pedestal is made of ceramic resin or the like.

[0031] The high-pressure discharge lamp for a vehicle according to the present embodiment includes a first gas discharge unit and a second gas discharge unit. Can be easily adjusted. For example, by changing the longitudinal length of the first and second lead wires, it is possible to adjust the distance of the pedestal force without changing the position of the pedestal center axial force. Therefore, the positions of the first and second gas discharge portions can be determined strictly, and fine adjustment can be easily performed. At the same time, since the degree of freedom of the arrangement position of the gas discharge part is high, it can be applied to lamps of various shapes.

Embodiment 2>

Embodiment 2 Overview>

[0032] In the present embodiment, the pedestal force is supported by the third lead wire that rises in the vertical direction, and rises in the vertical direction while avoiding the third lead wire from the pedestal, and the third gas discharge portion disposed in the space above the pedestal. The fourth gas discharge is arranged at the upper part of the third gas discharge part, supported by the fourth lead wire, which is bent near the height of the third gas discharge part and is directed upward of the third gas discharge part. A high pressure discharge lamp for a vehicle.

[0033] The high-pressure discharge lamp for a vehicle according to the present embodiment is supported by a third lead wire that rises in the vertical direction with respect to the base and the base force, and has a third gas discharge part that is disposed in a substantially central upper space of the base, and also has a base force. A fourth lead wire that rises in the vertical direction while avoiding the third lead wire, and is supported by the fourth lead wire that is directed upward at the third gas discharge portion by bending at the height position of the third gas discharge portion. And a fourth gas discharge part disposed on the third gas discharge part and in the substantially central upper space of the pedestal.

FIG. 9 is a conceptual diagram showing an example of a high-pressure discharge lamp for a vehicle according to this embodiment. (a) is a perspective view, and (b) and (c) are views seen from the direction of the arrows shown in (1) and (2) shown in the perspective view. As for the pedestal (0901) force, the third lead wire (0902) and the fourth lead wire (0903) rise and are connected to the third gas discharge portion (0904) and the fourth gas discharge portion (0905). The third and fourth gas discharge portions are disposed in the ultraviolet shielding glass tube (0906).

[0035] The pedestal has third and fourth lead wires and a power supply terminal (0907) for connecting the power connector of the vehicle body. Power terminals are pedestal on the third and fourth lead wires, respectively Connected internally. Further, the pedestal is provided with a convex portion and a concave portion (0908) for determining the front-rear position and the vertical position of the high-pressure discharge lamp for the vehicle relative to the vehicle body. The shape of the convex portion, the concave portion and the pedestal varies depending on the type of lamp. Since the pedestal shape and the lamp type have been described in the first embodiment, a detailed description thereof will be omitted.

[0036] The third lead wire and the fourth lead wire are wires for flowing a current to the gas discharge portion. The third lead wire sends current to the third gas discharge section, and the fourth lead wire sends current to the fourth gas discharge section. Stand up vertically from the pedestal in the third lead wire, UV shielding glass tube, and pass current to the third gas discharge section. The fourth lead wire rises vertically from the pedestal while avoiding the third lead wire, bends upward near the third gas discharge part height, and is arranged above the third gas discharge part. Current is passed through the fourth gas discharge section.

FIG. 10 is a schematic view showing an example of a method for arranging the third lead wire (1001) and the fourth lead wire (1002). In order to make the drawing easier to see, the shape of the pedestal and the ceramic tube that protects the lead wires are partially omitted. (A) shows a configuration in which a lead wire is accommodated in a bifurcated glass sealing tube (1003). (b) is a single glass sealed tube (1004) with a lead wire. Since the detailed description of the bifurcated glass sealing tube and the single glass sealing tube is substantially the same as that of the first embodiment, detailed description thereof is omitted. Whether to use a bifurcated glass sealing tube or a single glass sealing tube may be determined in consideration of the size of the high-pressure discharge lamp for vehicles and the influence of shadows generated by the glass sealing tube. .

[0038] The third and fourth gas discharge portions are sealed with glass, and a gas such as xenon or mercury is filled in the glass. A pair of electrodes for discharging the current supplied from the third and fourth lead wires are provided inside the third and fourth gas discharge portions, respectively. The gas discharge part emits light by discharging between the pair of electrodes. Since the structure in the vicinity of the electrodes of the third and fourth gas discharge portions and the electrode arrangement method of the present embodiment are substantially the same as those in FIG. 4 of Embodiment 1, detailed description thereof is omitted.

FIG. 11 shows an example of an arrangement method of the third gas discharge part (1101) and the fourth gas discharge part (1102). Figure 10 shows the force when the two gas discharge parts of the third and fourth gas discharge parts are arranged in parallel in the same direction. May be arranged. (A) is a case where a bifurcated glass sealing tube (1103) is used, and (b) is an example using a single glass sealing tube (1104). Since the detailed description of the arrangement method of the gas discharge part is almost the same as that of the first embodiment, the detailed description is omitted. Note that the arrangement method of the gas discharge part is changed according to the size of the base, the wiring space of the lead wire, and the direction of the optical axis.

[0040] The high-pressure discharge lamp for a vehicle of the present embodiment is the same as the light-shielding plate and the light-shielding coating as in the first embodiment when used for a light-shielding plate such as an H4 lamp and a lamp that requires light-shielding coating. It is necessary to attach a functional cap. Similar to the first embodiment, these caps have the same functions as the light shielding plate and the light shielding coating by attaching a metal cap to the outside of the ultraviolet shielding glass tube. Further, the light shielding coating and the cap may be fulfilled by directly applying the light shielding paint to the ultraviolet shielding glass tube. The details of the cap are almost the same as those of the first embodiment, and thus detailed description thereof is omitted.

Embodiment 2 Specific Example>

FIG. 12 shows a specific example of the vehicle high-pressure discharge lamp shown in the present embodiment. The high-pressure discharge lamp for vehicles in Fig. 12 is a high-pressure discharge lamp for vehicles designed as an H4 type lamp for vehicles. The pedestal (1201) is provided with a power terminal (1202) for connection to a power socket of the vehicle body. From the opposite side of the power supply terminal, the third lead wire (1204) sealed in the single glass sealing tube (1208) rose from the inside of the UV shielding glass tube (1203) and supported by the third lead wire. The third gas discharge part (1205) is arranged at the substantially central part of the pedestal. The position leads away from the third lead wire in the UV shielding glass tube. The fourth lead wire (1206) sealed in the single glass sealing tube rises vertically, and near the third gas discharge section height. The second gas discharge part is bent upward and is connected to the fourth gas discharge part (1207) disposed in the upper part of the third gas discharge part and the substantially upper center space of the pedestal. In addition, a cap (1209) serving as a light shielding coating and a light shielding plate is attached.

[0042] The height from the lamp pedestal to the tip of the cap is approximately 54. lmm, and the height from the pedestal force to the power terminal is approximately 21.2 mm. The center of the first gas discharge part is located approximately 24.7 mm from the pedestal, and the center of the second gas discharge part is approximately 31.5 mm from the pedestal. The base and cap are made of metal materials such as stainless steel, aluminum, and iron. ing. The lower part of the base is made of ceramic.

[0043] The high-pressure discharge lamp for a vehicle according to the present embodiment can provide a lamp with a reduced height because the lead wire is not folded back by 180 degrees. In particular, it can be applied to small headlamps and fog lamps. In addition, since the degree of freedom of the arrangement position of the gas discharge part is high, it can be applied to lamps of various shapes.

Embodiment 3>

Embodiment 3 Overview>

[0044] In the high-pressure discharge lamp for a vehicle according to the present embodiment, a discharge bulb main body is disposed on a pedestal. By disposing the discharge bulb body obliquely with respect to the pedestal, the fifth gas discharge part and the sixth gas discharge part of the discharge valve body were defined by the manufacturing standard for high-pressure discharge lamps for vehicles. Placed in position.

[0045] The high-pressure discharge lamp for a vehicle according to the present embodiment is a force with a discharge bulb main body and a pedestal on which the discharge bulb main body is arranged, and the discharge bulb main body is arranged upright on the base connected to the pedestal. A glass bulb, two lead wires standing up from the base in the glass bulb, a first gas discharge portion connected to one of the two lead wires in the glass bulb, and this first gas discharge force A second gas discharge portion disposed on the opposite side of the base shaft as viewed and connected to the other of the two lead wires, and the pedestal includes the discharge valve body at the center of the first gas discharge portion, The center of the second gas discharge part sandwiches the pedestal center axis defined in the vehicle discharge lamp manufacturing standard, and the sum of the distance between the pedestal center axis and the center of both gas discharge parts is the center of both gas discharge parts and the base axis. So that it is smaller than the sum of the distances There has been placed.

[0046] The pedestal is a member having an interface of a vehicle main body to be installed with a high-pressure discharge lamp for a vehicle.

FIG. 13 shows a conceptual diagram of the discharge bulb main body of the present embodiment. The main body of the discharge bulb consists of a base (1301) connected to the pedestal of the high-pressure discharge lamp for vehicles, a glass bulb (1302) placed upright on the base, and two lead wires that stand up from the base inside the glass bulb ( 13 03), and a fifth gas discharge section (1304) and a sixth gas discharge section (1305) connected to the lead wire.

[0048] The base is a base made of ceramic or the like to which a glass bulb and two lead wires are connected. From the surface opposite to the surface where the glass bulb of the base and the two lead wires are connected, there is a power supply terminal that connects to the lead wire and supplies power to the fifth gas discharge section and the sixth gas discharge section. It is connected. This power terminal is connected to a power socket of the vehicle body.

[0049] The glass bulb is a glass tube having a function of shielding ultraviolet rays emitted from the fifth gas discharge section and the sixth gas discharge section. The glass bulb is arranged to stand vertically with respect to the base. Inside the glass bulb, a fifth gas discharge part and a sixth gas discharge part and lead wires connected to the respective discharge parts are arranged.

[0050] The lead wire plays a role of supplying power supplied from the power socket of the vehicle body to the fifth gas discharge unit and the sixth gas discharge unit. Figure 14 shows an example of the lead wire placement method. Two lead wires (1403) connected to the fifth gas discharge part (1401) and the sixth gas discharge part (1402) are provided to supply power to the positive and negative poles. Lead wires are connected. As shown in (a) of the lead wire, one end of the lead wire may be inside the glass bulb (1405) of the base (1404) and the other end may be outside the glass bulb. Further, as shown in (b), both ends of the lead wire may be in the glass bulb. As shown in (c), the lead wire may be bent midway as long as it does not necessarily stand up perpendicular to the base force. Moreover, the shape as shown in Embodiment 1 or Embodiment 2 may be used.

[0051] The fifth gas discharge part and the sixth gas discharge part are electrodes sealed with glass and filled with a gas such as xenon or mercury, and discharge the electric power supplied from the lead wires therein. A pair is provided and discharges between the electrodes to emit light. Note that the internal structures of the fifth gas discharge section and the sixth gas discharge section are substantially the same as those in the first and second embodiments, and a detailed description thereof will be omitted. The fifth gas discharge section and the sixth gas discharge section are used for lamps having different applications, for example, H4 type lamps, lamps for e-beams and lamps for single beams. As described in the first embodiment, when it is used for an H4 type lamp, the position of the lamp for the beam, the lamp for the low beam and the lamp for the low beam shown in FIG. 19 (standard of the H4 lamp shown in the conventional example) is shown. 5 gas discharge section and 6th gas discharge section are arranged. There is a need to.

[0052] Other standard lamps of H4 type lamp (HI type, H3 type, H3a type, H3c type, H3d type, H4U type, H7 type, HB3 (9005) type, 9005J type, HB4 (9006) type, 9006J When the high-pressure discharge lamp for a vehicle according to this embodiment is used for the type 702K), the fifth gas discharge part and the sixth gas discharge part are placed at the same position as the standard by using various methods as shown in FIG. Deploy. If there is enough space for installing the high-pressure discharge lamp for vehicles, the position of the discharge part can be adjusted to the standard by the method shown in Fig. 14, but in the case of headlights such as automobiles It is difficult to reproduce the standard position with less space. Therefore, the high-pressure discharge lamp for a vehicle according to the present embodiment inclines the surface on which the glass bulb of the base of the discharge bulb body is disposed with respect to the pedestal, so that the fifth gas discharge section and the sixth gas discharge section Adjust the placement position of and reproduce the position as per the standard. Hereinafter, a case where the high-pressure discharge lamp for a vehicle according to this embodiment is used for an H4 type lamp will be described as an example.

FIG. 15 shows an example of the high-pressure discharge lamp for a vehicle according to this embodiment in the case of using V for an H4-type lamp. (A) is a conceptual diagram of only the discharge bulb main body. As described above, the discharge bulb body is composed of a base (1501), a glass bulb (1502), a lead wire (1503), a fifth gas discharge part (1504), and a sixth gas discharge part (1505). The glass bulb stands upright with respect to the base, and the fifth gas discharge portion and the sixth gas discharge portion are arranged inside the glass bulb. In this state, the position of the fifth gas discharge part and the sixth gas discharge part is different from the standard of the H4 type lamp. Therefore, as shown in (b), the discharge valve body in (a) is tilted. Then, as shown in (c), the glass bulb at the base of the discharge bulb body is arranged with respect to the pedestal reference surface (1506), and the discharge bulb body is arranged on the pedestal (1508) with the surface (1507) inclined. .

[0054] The pedestal of the high-pressure discharge lamp for a vehicle according to the present embodiment has the discharge bulb body sandwiching the center of the fifth gas discharge portion and the central force of the sixth gas discharge portion between the pedestal central axis and the pedestal central axis and both gas guides. The base is arranged so that the sum of the distances from the centers of the gas discharge parts is smaller than the sum of the distances between the centers of the two gas discharge parts and the base axis of the discharge bubble body.

[0055] The base axis may be a base normal axis or a base central axis. If the glass bulb is axisymmetric with respect to the central axis of the glass bulb, Alternatively, it may be the central axis of the glass bulb. When (a) in Fig. 16 is the base normal axis, (b) is the base axis, and (c) is the glass valve center axis instead of the base axis. An example is shown. FIG. 16 is a conceptual diagram for explaining the positions of the fifth gas discharge part (1601) and the sixth gas discharge part (1602) of the high-pressure discharge lamp for a vehicle shown in FIG. 15 (c). It is simplified to show the position of the part.

[0056] In the case of (a), the base axis is an axis whose right angle is perpendicular to the base portion of the discharge bulb body if it is a base normal axis. At this time, the pedestal (1603a) of the high-pressure discharge lamp for the vehicle sandwiches the discharge bulb body between the center of the fifth gas discharge part and the central force pedestal center axis (1604a) of the sixth gas discharge part. The sum (a + b) of the distance from the center of both gas discharge parts is more than the sum (c + d) of the distance from the center of both gas discharge parts and the center axis (1606a) of the base of the discharge bubble body (1605a) The base is arranged to be small.

[0057] In (b), the central axis of the glass bulb does not coincide with the central axis of the base. In the case of (b), since the base axis is the base center axis, the lengths of e and f in the figure, that is, the distance from the base center axis to the base end is equal (e = f). At this time, as in the case of (a), the pedestal (1603b) of the high-pressure discharge lamp for vehicles has the discharge bulb main body at the center of the fifth gas discharge portion and the central force of the sixth gas discharge portion. 1604b), and the sum (a + b) of the distance between the center axis of the base and the center of both gas discharge parts is the center axis of both gas discharge parts and the center axis (1606b) of the base of the discharge bubble body (1605b). The base is arranged to be smaller than the sum of the distances (c + d).

In (c), as in (b), the central axis of the glass bulb does not coincide with the central axis of the base.

In the case of (c), the base axis may be the central axis of the glass bulb (1605c) instead of the base axis. In other words, when the central axis of the glass bulb is used instead of the base axis, the end of the glass bulb and the central axis distance g and h of the glass bulb are the same distance (g = h). In this case as well, as in (a) and (b), the pedestal (1603c) of the high-pressure discharge lamp for vehicles has the discharge valve body at the center of the fifth gas discharge part and the central force of the sixth gas discharge part. The sum (a + b) of the distance between the center axis of the pedestal and the center of both gas discharge parts (a + b) is the center axis of the base of both gas discharge parts and the base of the discharge bubble body (1605c) ( The base is arranged so as to be smaller than the sum (c + d) of the distance to 1606c). This is the same as the standard of H4 type lamp. Both gas discharge portions can be arranged at such positions. The angle of inclination of the base with respect to the base reference plane is changed according to the positions of the fifth gas discharge section and the sixth gas discharge section with respect to the base. At this time, it is desirable to have an angle that can reproduce the position of the discharge part according to the standard without taking up the most space.

[0059] Further, as in the first and second embodiments, the high-pressure discharge lamp for a vehicle according to the present embodiment uses a cap when a light shielding plate or a light shielding coating is required. For example, when the vehicle high-pressure discharge lamp of this embodiment is used as an H4 type lamp, a light shielding cap (1701) may be installed as shown in FIG.

[0060] The high-pressure discharge lamp for a vehicle according to the present embodiment tilts the base surface of the discharge bulb main body with respect to the pedestal reference surface, thereby narrowing the position of the gas discharge portion as the light emitting portion even in a space. It becomes possible to arrange according to the standard. In addition, by tilting the discharge bulb body with respect to the pedestal, it is possible to arrange the gas discharge part at an ideal position without changing the arrangement of the lead wire and the gas discharge part into an unreasonable shape. . This makes it possible to reduce production yields and reduce costs.

Embodiment 3 Specific Example>

FIG. 18 shows a specific example when the high-pressure discharge lamp for a vehicle according to the present embodiment is used as an H4 type lamp. The high-pressure discharge lamp of this embodiment has a height of approximately 54.1 mm from the pedestal reference surface (1801) to the top of the discharge valve body (1802), from the pedestal reference surface to the center of the fifth gas discharge part (1803). The height to the center of the sixth gas discharge part (1804) is approximately 31.25 mm. The height from the bottom surface of the pedestal (1805) to the pedestal reference plane is approximately 21.2 mm. The bottom surface of the pedestal is approximately circular with a diameter of approximately 22.5 mm. The fifth gas discharge section and the sixth gas discharge section are arranged at a position where the pedestal central axis (1806) force is 0.4 mm away.

Brief Description of Drawings

FIG. 1 is a conceptual diagram showing a high-pressure discharge lamp for a vehicle according to Embodiment 1.

FIG. 2 is a conceptual diagram showing an example of a lead arrangement method according to the first embodiment.

FIG. 3 is a conceptual diagram showing an example of a lead arrangement method according to the first embodiment. 圆 4] Diagram for explaining the arrangement method of the gas discharge part of Embodiment 1 圆 5] Diagram for explaining the structure of the gas discharge part of Embodiment 1

圆 6] Diagram for explaining the change of the optical axis depending on the presence or absence of the light shielding plate of Embodiment 1.

圆 7] A diagram for explaining the shape of the cap of the first embodiment

圆 8] A diagram for explaining a specific example of the first embodiment

FIG. 9 is a conceptual diagram showing a high-pressure discharge lamp for a vehicle according to Embodiment 2.

圆 10] A diagram for explaining the bifurcated glass sealing tube and the single glass sealing tube of Embodiment 2. 圆 11] A diagram for explaining the arrangement method of the gas discharge part of Embodiment 2.

[12] A diagram for explaining a specific example of the second embodiment.

FIG. 13 is a conceptual diagram of a discharge bulb main body according to Embodiment 3.

圆 14] Conceptual diagram of an example of the discharge bulb main body of Embodiment 3

圆 15] Conceptual diagram explaining the installation method of the discharge bulb main body and pedestal of Embodiment 3 圆 16] Conceptual diagram explaining the positional relationship of the gas discharge part of Embodiment 3

圆 17] Diagram for explaining the shape of the cap of Embodiment 3

[18] A diagram for explaining a specific example of the third embodiment.

[Fig.19] Diagram for explaining the structure of H4 lamp

FIG. 20 is a diagram for explaining optical axis misalignment.

Explanation of symbols

0101 pedestal

0102 First lead wire

0103 Second lead wire

0104 First gas discharge part

0105 Second gas discharge part

0106 UV shielding glass tube

0107 Power supply terminal

0108 Convex part (concave part)

Claims

The scope of the claims

[1] Pedestal,

Pedestal force A first gas discharge part that is supported by the first lead wire that rises in the vertical direction and is arranged in the upper space substantially in the center of the pedestal,

Pedestal force A second lead wire that rises in the vertical direction avoiding the first lead wire, and is supported by the second lead wire that turns back approximately 180 degrees against the first gas discharge section below, and the first gas discharge A second gas discharge unit disposed on the upper part and in a substantially central upper space of the pedestal;

A high-pressure discharge lamp for a vehicle having:

[2] Pedestal,

A pedestal force is supported by a third lead wire that rises in the vertical direction, and is disposed in a substantially central upper space of the pedestal.

The pedestal force is also the fourth lead wire that rises in the vertical direction avoiding the third lead wire, and is bent at the height position of the third gas discharge part to turn upward toward the third gas discharge part. A fourth gas discharge part supported and disposed on the third gas discharge part and in a substantially central upper space of the pedestal;

A high-pressure discharge lamp for a vehicle having:

3. The high pressure discharge lamp for a vehicle according to claim 1 or 2, wherein the lead wire is a forked lead wire connected to a pair of electrodes of a gas discharge portion by a forked glass sealing tube.

4. The vehicle high-pressure discharge lamp according to claim 1 or 2, wherein the lead wire is a single lead wire connected to a pair of electrodes of a gas discharge part by a single glass sealing tube.

[5] A high-pressure discharge lamp for a vehicle comprising a discharge bulb main body and a pedestal on which the discharge bulb main body is arranged,

The discharge bulb body is

A base connected to the pedestal, a glass nozzle arranged upright on the base, two lead wires standing up from the base in the glass valve, and one of the two lead wires connected to the glass bulb A first gas discharge part, and a second gas discharge part disposed on the opposite side of the base axis as viewed from the first gas discharge part and connected to the other of the two lead wires, The discharge valve body has the center of the first gas discharge section and the center of the second gas discharge section sandwiching the base axis of the pedestal defined by the vehicle discharge lamp manufacturing standard, and the center of the base and the centers of the two gas discharge sections. The base is arranged so that the sum of the distances between and the center of both gas discharge parts is smaller than the sum of the distances between the center of both gas discharge parts and the base axis.

High-pressure discharge lamp for vehicles.

6. The high-pressure discharge lamp for a vehicle according to claim 5, wherein the base axis is a base normal axis.

7. The vehicle high-pressure discharge lamp according to claim 5 or 6, wherein the base shaft is a base central shaft.

[8] The glass bulb is axisymmetric with respect to the glass bulb central axis,

The high-pressure discharge lamp for a vehicle according to any one of claims 5 to 7, wherein a central axis of the glass bulb is used instead of the base axis.