WO2003093724A1

WO2003093724A1 - Lamp unit

Info

Publication number: WO2003093724A1
Application number: PCT/JP2003/005633
Authority: WO
Inventors: Kazuhito Sakai; Tohru Suda; Yoshihumi Kanai
Original assignee: Carmate Mfg.Co., Ltd.
Priority date: 2002-05-02
Filing date: 2003-05-02
Publication date: 2003-11-13
Also published as: JP4523657B2; JP2008251546A; JP4176712B2; JPWO2003093724A1; TW200306396A

Abstract

A lamp unit (10) has a guide portion (32) so installed in an opening portion (18) of an installation member (12) as to project backward. The guide portion (32) is inclined downward at its rear end side at a predetermined angle. A lamp support portion (34) is disposed movably inside the guide portion (32). An HID lamp (20) installed at the lamp support portion (34) is perpendicular to a face of the installation member (12). A solenoid shaft (44) is screwed in the rear end of the lamp support portion (34). The lamp support portion (34) is moved by a solenoid (56) detachably attached to the guide portion (32) along the guide portion (32) through the solenoid shaft (44).

Description

JP03 / 05633

Description Lamp unit Technical field

The present invention relates to a lamp unit for lighting, and more particularly to a lamp unit suitable for a case where a high-intensity discharge lamp is used as a headlight of a vehicle. Background art

Until now, halogen lamps have been the mainstream for vehicle headlamps, but in recent years, high-intensity discharge lamps (so-called HID lamps: High Intensity Discharge lamps) have been adopted. HID lamps are characterized by high luminous efficiency and the ability to obtain brighter light. And, if a vehicle already purchased uses a halogen lamp as its headlight, many people would like to replace it with a HID lamp.

However, H4 type halogen lamps have two filaments, each of which emits light when the low beam (passing beam) and high beam (running beam). In contrast, it is currently difficult for HID lamps to provide two light emitting points. Therefore, when the HID lamp is used in place of the existing halogen lamp, it is necessary to move one light emitting point of the HID lamp between the mouth beam position and the high beam position.

When HID lamps are used in place of H4 type halogen lamps, the requirements specified in JISC 7506-1-1 (hereinafter simply referred to as JIS) must be satisfied. This JIS specifies the position of the light emitting point during low beam and high beam, with the front surface of the flange of the mounting member attached to the rear end opening of the reflector as the reference plane. Specifically, the position of the light emitting point at the time of the low beam is 29.5 mm ahead of the reference plane, and the position of the light emitting point at the time of the high beam is 23.5 mm ahead of the reference plane. In addition, the position of the light emitting point in the high beam is set to be 0.8 mm lower than the position of the light emitting point in the low beam. Therefore, Japanese Patent Laid-Open Publication No. 2001-35211 proposes a lamp unit that moves a HID lamp in an axial direction (a longitudinal direction of a vehicle) using a solenoid. This lamp unit has a guide member (rod) arranged along the moving direction of the HID lamp (discharge tube), and a lamp holding member (socket) that moves along the guide member while holding the HID lamp. are doing. This lamp holding member is urged to the mouth-to-beam position by the urging force of the compression spring. On the other hand, when the lamp holding member is pulled by the solenoid (drive means), the lamp moves to the home position. .

However, the lamp unit described in Japanese Patent Application Laid-Open No. 2000-35021 (hereinafter referred to as a conventional lamp unit) is formed by integrating an HID lamp and a solenoid in series. . For this reason, in the conventional lamp unit, the portion protruding rearward from the flange is extremely long. Therefore, the conventional lamp unit cannot be mounted on many types of vehicles because it interferes with other parts provided on the vehicle when mounted on the reflector. In addition, since the conventional lamp unit only moves the HID lamp back and forth on its axis, the center position of light emission when the light emitting unit is moved to the high beam position is the same as the low beam position. The height is not enough to satisfy the requirements of JIS. ^ And to meet the requirements of JIS, it is necessary to move the HID lamp diagonally up and down. To realize this, a structure has been proposed in which the HID lamp is moved by a link mechanism. However, when the HID lamp is moved by the link mechanism, the structure is complicated, the size is increased, the cost becomes high, and the possibility of failure increases.

HID lamps also have the characteristic of generating heat at high temperatures when emitting light. As a result, in the lamp unit, the temperatures of the lamp holding member and the guide member also increase, and these members expand. The lamp unit is provided with a sufficient clearance between the guide member and the lamp holding member so that the lamp holding member can move along the guide member even when the lamp holding member and the guide member thermally expand. Need to be secured. In particular, if the lamp holding member is made of a resin material with a large coefficient of linear expansion and the guide member is made of a metal material with a small coefficient of linear expansion, a large clearance should be secured between the two. 03 05633

3 you need.

However, if a large clearance is provided between them, the position of the lamp holding member with respect to the guide member varies. In particular, if the position of the lamp holding member varies at the time of the low beam and the high beam, the position of the light emitting portion of the HID lamp also varies. As a result, the reflected light from the reflector is not sufficiently obtained, and the intended low beam and high beam cannot be formed.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and has as its object to be able to be mounted on H4-type lamps of many types of vehicles.

Another object of the present invention is to enable a lamp to be moved in an oblique direction with a simple structure.

An object of the present invention is to obtain good light distribution characteristics between a high beam and a low beam.

Another object of the present invention is to reduce the size and save energy.

Another object of the present invention is to ensure that the light emitting portion of the HID lamp can be arranged at a predetermined low beam position and high beam position. Disclosure of the invention

A first lamp unit according to the present invention includes: a mounting member mounted on a rear end opening of a reflector; a guide portion provided at a central opening of the mounting member and protruding rearward; A lamp holding portion movably provided along the portion, a lamp fixed to a front end portion of the lamp holding portion, protruding from a front surface of the mounting member / arranged in the reflector, and being detachably attached to the guide portion. And a drive unit that is freely mounted and moves the lamp holding unit along the guide unit. The drive unit may be a solenoid, a cam, a stepping motor, a cylinder electromagnet, or the like.

The first aspect of the present invention as described above is that the drive unit for moving the lamp holding unit is detachable from the guide unit, so that the drive unit can be removed when the lamp unit is mounted on the reflector. it can. Thereby, the present invention When mounted on the reflector, the length of the part protruding backward from the lamp holding part can be shortened, interference with vehicle-mounted parts can be eliminated, and it can be easily mounted on many types of vehicles.

The second lamp unit according to the present invention further includes a mounting member attached to a rear end opening of the reflector, a central opening of the mounting member, and protruding rearward, with the rear end facing downward. A guide portion tilted at a predetermined angle, a lamp holding portion movably provided along the guide portion, and a lamp fixed to a front end of the lamp holding portion and protruding from a front surface of the mounting member. A lamp is provided in the reflector, and a drive unit attached to the guide unit to move the lamp holding unit along the guide unit. In the second aspect of the present invention, the lamp attached to the lamp support is moved diagonally up and down only by moving the lamp support along the inclined guide by a drive unit such as a solenoid. The lamp can be moved obliquely with a simple structure.

It is desirable that the lamp is held by the lamp holding portion in parallel with the axis of the mounting member. Thus, when the lamp unit is mounted on the reflector, the lamp is held parallel to the axis of the reflector, that is, horizontally. Therefore, the lamp can be arranged at the high beam position and the mouth beam position in a normal posture, and good light distribution characteristics can be easily obtained.

The predetermined angle at which the guide is inclined should be (7.56 ± 1) degrees with respect to the axis of the mounting member. As described above, the horizontal distance between the mouth-to-mouth position and the high beam position according to the provisions of JIS is 6 mm, and the vertical (up-down) distance is 0.8 mm. Therefore, by inclining the guide portion by 7.56 degrees with respect to the axis of the mounting member, the light emitting portion of the lamp can be accurately arranged at the low beam position and the high beam position, and good light distribution characteristics can be obtained. Obtainable.

A lamp unit according to a third aspect of the present invention is a lamp unit having a guide portion arranged along a moving direction of a lamp, and a lamp holding portion moving along the guide portion while holding the lamp. In addition, the lamp holding portion is provided with a tapered ramp side inclined surface, and at the movement limit of the lamp holding portion. 03 05633

5 A tapered guide-side inclined surface for holding the lamp holding portion at a predetermined position by surface contact with the lamp-side inclined surface is provided.

In the present invention configured as described above, since the lamp-side inclined surface and the guide-side inclined surface have the tapered shape, when the lamp holding portion moves along the guide portion, the lamp-side inclined surface becomes the guide-side inclined surface. Guided by face. Then, when the ramp-side inclined surface and the guide-side inclined surface come into surface contact, the lamp holding portion is held at a predetermined movement limit position. Therefore, in the lamp unit of the present invention, even when a large clearance is secured between the guide section and the lamp holding section, the light emitting section of the HID lamp can be accurately arranged at the predetermined mouth-to-mouth and high-beam positions. And good light distribution characteristics. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a sectional view of a lamp unit according to a first embodiment of the present invention. FIG. 2 is an exploded view of the lamp unit according to the first embodiment.

FIG. 3 is a cross-sectional view when the lamp unit according to the first embodiment is mounted on a reflector.

FIG. 4 is a diagram for explaining the operation of the lamp unit according to the first embodiment. FIG. 5 is a diagram illustrating the light distribution characteristics of a low beam of a headlamp. FIG. 6 is an explanatory diagram of an arc generated in the light emitting portion of the HID lamp.

FIG. 7 is a side sectional view of a lamp unit according to the second embodiment.

FIG. 8 (1) is an explanatory diagram of a mouth-to-mouth state of the lamp unit according to the second embodiment, and (2) is an explanatory diagram of a high beam state of the lamp unit according to the second embodiment.

FIG. 9 (1) is an explanatory diagram of a low beam state of the lamp unit according to the third embodiment, and (2) is an explanatory diagram of an idle state of the lamp unit according to the third embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

Preferred embodiments of the lamp unit according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional view of a lamp unit according to a first embodiment of the present invention, and FIG. 2 is an exploded view thereof. In these figures, the lamp unit 10 has a mounting member 12 to be attached to a rear opening of a reflector (lamp) not shown. The mounting member 12 has a shape of an ashtray with a brim when viewed from the side, and is formed so as to satisfy the requirements of the mounting bracket provided for the base of the H4 type automotive light bulb specified in JIS. is there. The front surface of the flange portion 14 of the mounting member 12 is a reference surface 16 that defines the filament position (light emitting position) of the bulb specified in JIS. The mounting member 12 has an opening 18 for disposing the HID lamp 20 as a lamp at the center. A light blocking member 22 is attached to the opening 18 so as to protrude toward the front side of the vehicle (the side in FIG. 1).

The light-blocking member 22 is for enabling selection of a traveling beam (high beam) and a low beam (low beam) when the HID lamp 20 is turned on. The light shielding member 22 includes a first light shielding member 24 and a second light shielding member 26 provided at a tip of the first light shielding member 24. The first light shielding member 24 has a cylindrical shape at the front end and the rear end, and has an intermediate portion formed on a half cylinder. The first light-blocking member 24 has an intermediate portion on the half-cylinder disposed below the HID lamp 20 along the axis of the HID lamp 20, and the light emitted from the HID lamp 20 is reflected below the reflector. Surface to prevent reflection from the front of the vehicle. The first light-blocking member 24 has a cylindrical rear end with an upper portion inserted into the opening 18 of the mounting member 12.

The second light shielding member 26 is attached to the distal end ring portion 25 of the first light shielding member 24, covers the distal end of the HID lamp 20, and emits light emitted from the HID lamp 20 forward of the vehicle. Is prevented. The first light-blocking member 24 has a traveling beam window 28 formed at an intermediate portion in the longitudinal direction. The traveling beam window 28 reflects light emitted from the light emitting unit 30 when the light emitting unit 30 of the HID lamp 20 moves to a position corresponding to the traveling beam window 28, as described later. To the lower reflective surface, so that a traveling beam can be obtained.

Further, a guide portion 32 projects from the opening 18 of the mounting member 12 toward the rear side. In the case of the embodiment, the guide portion 32 is formed in a cylindrical shape. PT / JP03 / 05633

7

The rear end is inclined downward at a predetermined angle. In the case of the present embodiment, the inclination angle Φ is set at the center position of the light emitting section 30 when the HID lamp 20 moves 6 mm rearward from the passing beam position shown in FIG. The angle is 0.8 mm below the passing beam position. That is, the axis b of the guide portion 32 is inclined by 7.56 degrees with respect to the axis a of the mounting member 12. Note that this inclination angle Φ can be allowed in the range of (7.56 ± 1) degrees. If the inclination angle Φ is in the range of 6.56 ° to 7.56 °, when the HID lamp 20 is advanced to obtain a passing beam, or when it is retracted to obtain a traveling beam, The light emitting section 30 is arranged at a passing beam position or a traveling beam position substantially specified in JIS, and relatively good light distribution characteristics of the passing beam or the traveling beam can be obtained.

In the case of the embodiment, the guide portion 32 has a half-split structure as shown in FIG. 2, and is composed of a semi-cylindrical upper guide piece 32a and a lower guide piece 32b. It has been done. Inside the guide section 32, a lamp support section 34 is movably arranged. The lamp support portion 34 is formed of an insulating material such as plastic, and includes a lamp holding portion 36 and a shaft mounting portion 38. The shaft mounting part 38 is provided integrally with the rear part of the lamp holding part 36. Further, the lamp holding portion 36 has a holding hole 40 for inserting the base end side of the HID lamp 20 at the distal end side. The axis of the holding hole 40 intersects the axis of the guide portion 32 and is parallel to the axis of the mounting member 12. Therefore, the HID lamp 20 held in the holding hole 40 is supported by the lamp support portion 34 in a state orthogonal to the reference surface 16 and protrudes from the front surface of the mounting member 12. Therefore, when the lamp unit 10 is mounted on a reflector of a vehicle headlight (not shown), the HID lamp 20 is held horizontally in parallel with the axis of the reflector.

The shaft mounting portion 38 has a screw hole 42 on the rear end surface. The tip of a solenoid shaft 44 is screwed into the screw hole 42. The solenoid shaft 44 includes a small-diameter portion on the front end side and a large-diameter portion on the rear end side, and a spring receiver 46 is fitted on the base end of the small-diameter portion. A compression spring 48 penetrating the small diameter portion of the solenoid shaft 44 is interposed between the rear end surface of the shaft mounting portion 38 and the spring receiver 46. PC leak 3/05633

8 As shown in FIG. 2, the lower guide piece 3 2 b of the guide part 3 2 has a flange part 50 for screwing to the mounting member 12 at the front end and a rear end part at the rear end. It has a connecting portion 52 for fastening to the upper guide piece 32a. The above-described spring receiver 46 is arranged inside the connecting portion 52. For this reason, the compression spring 48 biases the lamp support 34 forward. In addition, a plurality of L-shaped engaging claws 54 are provided concentrically on the rear end face of the lower guide piece 32b. To these locking claws 54, a solenoid 56 as a driving unit is detachably mounted. At the front end of the mounting member 12, a stopper 55 is provided to determine the forward end position of the lamp support 34.

As shown in FIG. 2, the solenoid 56 includes a casing 58, a solenoid body 60, and a cover 62. The casing 58 has a cylindrical projection 64 integrally formed on the front surface. As shown in FIG. 2 (2), a central hole 66 through which the large diameter portion of the solenoid shaft 44 penetrates is formed in the front end face of the cylindrical convex portion 64. Around the center hole 66, a plurality of claw holes 68 capable of receiving the locking claws 54 provided on the lower guide piece 32b are formed so as to communicate with the center hole 66. . Therefore, by inserting the locking claw 54 of the lower guide piece 32b into the claw hole 68 provided in the casing 58 of the solenoid 56, and rotating the solenoid 56, the solenoid 56 is lowered. It can be detachably attached to the side guide pieces 32b. ′ The lower guide piece 32 b has a cutout 72 in which the code guide 70 is arranged at the lower part on the rear side. The code guide 70 has a semi-cylindrical guide body 7 and a pair of sleeve portions 76. The sleeve portion 76 is formed downward in the case of the embodiment. Each of these sleeve portions 76 passes a power supply cord 78 for lighting the HID lamp 20 drawn out of the lamp support portion 34, and the power supply cord 78 is connected to the guide portion. It is guided to the side of 32, that is, below the guide portion 32. Each of the power supply cords 78 is provided with a coating of silicon rubber, and a male connector 80 and a female connector 82 are attached to the ends.

In the case of the embodiment, the code guide 70 is movable along the power supply cord 78. In the lower part of the guide body 74, a displacement allowance portion 84 is provided. PC hire 633

9 (see Figure 1). The displacement allowance portion 84 is formed by cutting out the guide body 74, and when the HID lamp 20 is moved in the front-rear direction to switch between the traveling beam and the passing beam, the lamp support portion 3 is provided. It has a length in the front-rear direction that allows displacement of the power supply cord 78 that moves integrally with 4. Further, the sleeve portion 76 of the code guide 70 is formed to have an inner diameter sufficiently larger than the outer shape of the power supply cord 78, thereby facilitating displacement of the power supply cord 78. That is, the inner diameter of the sleeve portion 76 is formed to be 6 to 7 mm, for example, when the outer shape of the power supply cord 78 is 3.5 mm.

The lamp unit 10 according to this embodiment is mounted on a reflector of a vehicle headlight (not shown). When attaching to the reflector, as shown in Fig. 3, remove the solenoid 56 from the lower guide piece 32b to expose the solenoid shaft 44. In the case of the embodiment, the length from the rear surface of the flange portion 14 of the mounting member 1 2 to the rear end of the solenoid shaft 44 is almost the same as when the socket is mounted on an H4 type bulb specified in JIS. They are the same length.

After that, the code guide 70 is moved to the rear along the power supply cord 78, and the sockets 80, 82, and the code guide are inserted from the front side of the genuine waterproof rubber cover 90 mounted on the vehicle. Pass 70 through the hole in the waterproof rubber cover 90. Further, the guide portion 32 is passed through the hole of the waterproof rubber cover 90, and the front end of the waterproof rubber cover 90 is brought into contact with the rear end of the light shielding member 22, and is mounted on the peripheral surface of the guide portion 32. Thus, in the lamp unit 10 of the embodiment, since the code guide 70 is movable, the waterproof rubber cover 90 can be easily attached to the lamp unit 10.

Thereafter, as shown in FIG. 3, the code guide 70 is moved upward and fitted into the notch 72 of the lower guide piece 32b. Then, the lamp unit 10 to which the waterproof rubber cover 90 is attached is attached to the rear opening of the reflector by a holding spring (not shown) or the like. At this time, since the solenoid 56 is removed from the lamp unit 10, the amount of protrusion from the rear surface of the mounting member 12 is small, and the lamp unit 10 can be easily inserted without interfering with other parts provided on the vehicle. Can be attached. Therefore, it can be installed on most types of vehicles. Next, a solenoid 56 is attached to the rear end of the guide 32. That is, the locking claw 54 provided on the lower guide piece 32 b is inserted into the claw hole 68 provided in the casing 58 of the solenoid 56, and the solenoid 56 is rotated to form the locking claw 54. Lock it.

The lamp unit 10 mounted on the reflector in this manner has the lamp support portion 34 urged forward by the compression spring 48, and therefore, as shown schematically in FIG. In position. In the HID lamp 20, as shown in FIGS. 1 and 3, the light emitting section 30 is located ahead of the traveling beam window 28. Therefore, if the HID lamp 20 is turned on at this time, since light does not reach the lower reflecting surface of the reflector, a low beam is obtained.

In the lamp unit 10, the HID lamp 20 is held parallel to the axis of the mounting member 12, that is, perpendicular to the reference plane 16 and parallel to the axis of the reflector. For this reason, the lamp unit 10 can easily and reliably obtain the light distribution characteristics of the passing beam specified in JIS shown in FIG. Note that reference numeral 101 shown in FIG. 5 is a horizontal line of the lamp (reflector), and reference numeral 103 is a vertical line of the lamp. Reference numeral 105 in the figure denotes the irradiation range of the passing beam, and reference numeral 107 denotes the shadow range.

That is, when the HID lamp 20 is held horizontally, the arc generated between the electrodes 30a and 30b of the light emitting section 30 as shown in part (1) of FIG.

30 c forms a hollow spheroid. For this reason, when the HID lamp 20 is inclined, unexpected shadows and uneven light may occur. Also, when the HID lamp 20 is inclined, the shape of the arc 30c is deformed as shown in Fig. 6 (2), the heat generation is not uniform, and the HID lamp 20 glass is adversely affected. There is a possibility that the vehicle may go out due to the vibration of the vehicle.

On the other hand, when a current is supplied to the solenoid 56 to excite it, the solenoid shaft

44 is pulled rearward by the solenoid 56, and moves rearward against the urging force of the compression spring 48, as shown in FIG. 4 (2). For this reason, the lamp support portion 34 is moved to the rear side along the guide portion 32 integrally with the solenoid shaft 44 to be in the retreat limit position. In addition, the HID lamp 20 is Both of them recede, and the light-emitting portion 30 comes to a position corresponding to the traveling beam window 28 provided in the light shielding member 22. At this time, the light emitting section 30 is inclined obliquely downward so that the rear side of the guide section 32 is lower than the front side. As described above, the lamp unit 10 of the embodiment has the light emitting section 3 because the axis b of the guide section 32 is inclined by 7.56 degrees with respect to the axis a (horizontal plane) of the mounting member 12 as described above. When 0 moves backward from the passing beam position to the traveling beam position by 6 mm, the height decreases by 0.8 mm. Therefore, the requirements stipulated in JIS are completely satisfied, and good light distribution characteristics can be obtained.

Further, since the power supply cord 78 is provided with the displacement allowance portion 84 in the code guide 70, it is easily bent and displaced when the lamp support portion 34 is retracted. For this reason, the resistance caused by the displacement of the power supply cord 78 when the lamp support portion 34 is retracted or moved forward can be reduced, and the solenoid 56 as a drive portion can be reduced in size and energy can be saved.

The light emitted by the light emitting section 30 that has receded to the traveling beam position enters the lower reflecting surface of the reflector via the traveling beam window 28, is reflected toward the front of the vehicle, and is transformed into a traveling beam (high beam). Form. When the power supply to the solenoid 56 is stopped, the HID lamp 20 automatically advances to the passing beam position via the lamp support 34 by the spring force of the compression spring 48.

As described above, in the lamp unit 10 according to the first embodiment, the guide portion 32 for guiding the lamp support portion 34 holding the HID lamp 20 is inclined at a predetermined angle with the rear end side facing downward. As a result, the light emitting portion 30 of the HID lamp 20 can be arranged at the passing beam position and the traveling beam position specified in JIS only by moving the lamp support portion 34 by the solenoid 56. The structure can be simplified without the need for a link mechanism.

Note that the above embodiment is one aspect of the present invention, and the present invention is not limited to this. For example, in the above embodiment, the case where the driving unit is the solenoid 56 is described, but the driving unit may be a stepping motor, an electromagnet, a cam, a cylinder, or the like. When a solenoid is used as the drive unit, a self-holding type using a magnet may be used as a method of holding the solenoid shaft at the forward limit position and the backward limit position, or a current may be supplied to the solenoid. Retention You may make it do. In the above embodiment, the case where the code guide 70 is movable along the power supply cord 78 has been described, but the code guide is fixed to the guide portion 32 and the sleeve portion 76 is deformed by itself. The location may be made of a flexible material. Further, in the above-described embodiment, the case where the power supply cord 78 is guided below the guide portion 32 has been described, but the power supply cord 78 can be guided in any direction as needed.

FIG. 7 is a side sectional view of a lamp unit according to the second embodiment. The lamp unit 10OA according to the second embodiment has substantially the same basic configuration as the lamp unit 10 of the first embodiment. However, the lamp unit 10A of the second embodiment has a taper-shaped ramp-side inclined surface 37a, 37b provided on a lamp holding member (lamp holding portion) 36a, and a lamp holding member 3A. By making surface contact with the ramp-side inclined surfaces 37a and 37b at the movement limit of 6a, the tapered guide-side inclined surfaces 13 and 33 that hold the lamp holding member 36a in place are formed. It is provided.

The guide member (guide portion) 32a in the embodiment includes a front large-diameter cylindrical portion and a rear small-diameter cylindrical portion, and is formed by aluminum die casting or the like. The lamp holding member 36a disposed inside the guide member 32a has a large-diameter portion at the front and a small-diameter portion at the rear, and is formed of an insulating material such as plastic.

The lamp holding member 36a is movably arranged along the guide member 32a. On the other hand, the opening 18 of the mounting member 12 is formed smaller than the large diameter portion of the lamp holding member 36a. Therefore, when the lamp holding member 36a moves forward along the guide member 32a, the lamp holding member 36a comes into contact with the peripheral edge of the opening 18 of the mounting member 12 and stops. At the forward limit position of the lamp holding member 36a, the light emitting section 30 of the HID lamp 20 is arranged at the passing beam position 21. When the lamp holding member 36a moves rearward along the guide member 32a, the lamp holding member 36a comes into contact with the rear end face of the large-diameter portion of the guide member 32a and stops. At the retreat limit position of the lamp holding member 36a, the light emitting portion 30 of the HID lamp 20 is arranged at the traveling beam position 23.

On the other hand, the entire periphery of the front end face of the large diameter portion of the lamp holding member 36a is 633

13 3 A chamfered shape is formed to form a ramp-side front inclined surface 37a. Further, a tapered guide-side front inclined surface 13 is also formed on the entire periphery of the opening 18 in the mounting member 12. Then, at the forward limit of the lamp holding member 36a, the lamp-side front inclined surface 37a and the guide-side front inclined surface 13 come into surface contact, and the lamp holding member 32a can be held at a predetermined position. it can. Further, the entire periphery of the rear end face of the large diameter portion of the lamp holding member 36a is chamfered in a tapered shape to form a lamp-side rear inclined surface 37b. A tapered guide-side rear inclined surface 33 is also formed on the entire periphery of the corner between the rear end surface and the side surface of the large-diameter cylindrical portion of the guide member 32a. Then, at the retreat limit of the lamp holding member 36a, the lamp-side rear inclined surface 37b and the guide-side rear inclined surface 33 come into surface contact, and the lamp holding member 36a can be held at a predetermined position. .

The ramp-side inclined surfaces 37a and 37b and the guide-side inclined surfaces 13 and 33 do not necessarily need to have tapered inclined surfaces all around. What is necessary is just to form a one-sided inclined surface. However, the interval between adjacent slopes shall be less than 180 °. Also, only the guide-side slopes 13 and 33 are tapered slopes, and projections are formed on the ramp-side slopes 37a and 37b so that they can be in point or line contact. Good.

On the other hand, at the rear end of the guide member 32a, a connecting portion (connecting plate) 52 to the solenoid 56 is formed. A screw hole 42 into which the small diameter portion of the solenoid shaft 44 is screwed is formed on the rear end face of the lamp holding member 36a. The solenoid shaft 44 consists of a small diameter portion at the front and a large diameter portion at the rear, and the small diameter portion is fixed to the lamp holding member 36a through a through hole in the center of the connecting plate 52. is there. On the other hand, a spring receiver 46 is disposed on the front side of the connecting plate 52, and a compression spring 48 is interposed between the spring receiver 46 and the rear end surface of the lamp holding member 36a. I have. As a result, the compression spring 48 biases the lamp support portion 34 forward, and positions the light emitting portion 30 of the HID lamp 20 at the passing beam position 21.

Further, a solenoid 56 is mounted on the connecting portion 52 as a driving portion of the solenoid shaft 44. Solenoid 56 resists the biasing force of compression spring 48 JP03 / 05633

14 4 The solenoid shaft 44 and the lamp support 34 are moved backward, and the light emitting portion 30 of the HID lamp 20 is arranged at the traveling beam position 23. Preferably, the solenoid 56 is detachable from the connecting plate 52. By removing the solenoids 56, the length of the lamp unit 10 can be shortened, so that when the lamp unit 10 is mounted on the reflector 8, interference with in-vehicle components can be eliminated. Therefore, the lamp unit 10 can be easily attached to many types of vehicles.

The lamp unit 1OA according to the first embodiment configured as described above is used by being attached to the reflector 8 of a vehicle headlamp. When the solenoid 56 is formed to be detachable, the solenoid 56 is removed from the guide member 32a, and the solenoid shaft 44 is exposed and attached to the reflector 8. In the case of the embodiment, the length from the front surface (reference surface 16) of the flange portion 14 of the mounting member 12 to the rear end of the solenoid shaft 44 is a socket for an H4 type halogen lamp specified in JIS. The length is set to be the same as the length with the.

FIG. 8 (1) shows the lamp unit 10A in the passing beam state. The lamp holding member 36a in FIG. 8 (1) is urged forward by the compression spring 48 and is at the forward limit position. Here, the light emitting section 30 of the HID lamp 20 is located ahead of the high beam window 28. In this case, the light from the light emitting section 30 in the HID lamp 20 is reflected by the first light shielding member 24 and does not reach the lower reflecting surface of the reflector. As a result, a passing beam is obtained.

FIG. 8 (2) shows the lamp unit 10A in a traveling beam state. When current is supplied to the solenoid 56 to excite it, the solenoid shaft 44 moves rearward against the urging force of the compression spring 48. Further, the lamp holding member 36a connected to the solenoid shaft 44 also moves to the retreat limit position along the guide member 32a. Here, the light emitting section 30 of the HID lamp 20 is located above the high beam window 28. In this case, the light from the light emitting section 30 passes through the high beam window 28, reaches the lower reflecting surface of the reflector, and is reflected forward of the vehicle. As a result, a traveling beam is obtained. On the other hand, the ramp-side rear inclined surface 37 b and the guide-side rear inclined surface 33 are tapered, so that when the lamp holding member 36 a moves rearward, the lamp-side rear inclined surface 37 b Is guided by the guide-side rear inclined surface 33 (see FIG. 8 (1)). Then, when the lamp-side rear inclined surface 37b and the guide-side rear inclined surface 33 come into surface contact, the lamp holding member 36a is held at a predetermined retreat limit position. That is, the lamp holding member 36a is held concentrically with the guide member 32a at the retreat limit position. As a result, the light emitting section 30 of the HID lamp 20 is arranged at the predetermined traveling beam position 23.

When the current supply to the solenoid 56 is stopped and demagnetized, the lamp holding member 36a is urged forward by the compression spring 48 to return to the forward limit position as shown in Fig. 8 (1). I do. Here, since the lamp-side front inclined surface 37a and the guide-side front inclined surface 13 are tapered, when the lamp holding member 36a moves forward, the lamp-side front inclined surface 37a Is guided by the guide side front inclined surface 13 (see FIG. 2 (2)). When the ramp-side front inclined surface 37a and the guide-side front inclined surface 13 come into surface contact, the lamp holding member 36a is held at a predetermined forward limit position. That is, the lamp holding member 36a is held concentrically with the guide member 32a at the forward limit position. As a result, the light emitting section 30 of the HID lamp 20 is arranged at a predetermined high beam position 22.

As described above, the lamp unit 10A according to the second embodiment has the tapered ramp-side inclined surface provided on the lamp holding member, and has a surface contact with the lamp-side inclined surface at the movement limit of the lamp holding member. Thus, a tapered guide-side inclined surface for holding the lamp holding member at a predetermined position is provided. Since the lamp-side inclined surface and the guide-side inclined surface have a tapered shape, when the lamp holding member moves along the guide member, the lamp-side inclined surface is guided by the guide-side inclined surface. Then, when the ramp-side inclined surface and the guide-side inclined surface are in surface contact, the lamp holding member is held at a predetermined movement limit position. Therefore, even when a large clearance is secured between the guide member and the lamp holding member, the light emitting portion 30 of the HID lamp 20 is accurately and reliably arranged at the predetermined low beam position 21 and the traveling high beam position 23. be able to. As a result, good light distribution characteristics It is possible to form a stable passing beam and a traveling beam, and the H4 type halogen lamp can be used in place of the HID lamp.

Next, a third embodiment will be described.

FIG. 9 is an explanatory diagram of a lamp unit according to the third embodiment. FIG. 9 (1) shows a passing beam state, and FIG. 9 (2) shows a traveling beam state. The lamp unit 110 according to the third embodiment includes a mounting member 112 attached to a rear end opening of the reflector, and a central opening of the mounting member 112 protruding rearward. Guide member (guide portion) 13 2, a guide groove 16 2 provided on a side surface of the guide member 13 2, and a lamp holder provided movably along the guide member 13 2. A member (lamp holding portion) 13 6, a pin 16 6 protruding from a side surface of the lamp holding member 13 6 and engaging with the guide groove 16 2, and a front end of the lamp holding member 13 6 A solenoid that is fixed and protrudes from the front surface of the mounting member 112, and moves the HID lamp 120 disposed in the reflector and the lamp holding member 136 along the guide member 132. 15 and the solenoid shaft 14 and the lamp holding member 13 and 6 A lamp unit 110 having a link member 144 connecting the solenoid shaft 144 and a taper-shaped ramp-side inclined surface 1 37 a and 1 37 b to a lamp holding member 1. At the same time, the lamp holding member 13 is held in a predetermined position by making surface contact with the ramp side inclined surfaces 13a and 13b at the movement limit of the lamp holding member 13. It is provided with a sloping guide side inclined surface 1 13, 1 3 3. The description of the same configuration as that of the second embodiment is omitted.

The guide member 132 in the third embodiment includes a large-diameter cylindrical portion at the front and a small-diameter cylindrical portion at the rear, and is arranged in parallel with the axis of the mounting member 112. A guide groove 162 is formed on the side of the large-diameter cylindrical portion of the guide member 132. The guide groove 16 2 is formed in an elliptical shape, and is positioned at the position where the mouth-to-beam position 1 2 1 and the high-beam position 1 2 2 of the light emitting section 130 of the HID lamp 120 are horizontally moved. Two fixed points of the circle are arranged. On the other hand, inside the guide member 13 2, there is a lamp holding member 1 3 comprising a large-diameter portion at the front and a small-diameter portion at the rear. 6 are arranged. The pin 166 protruding from the large diameter portion of the lamp holding member 136 is engaged with the guide groove 162 of the guide member 132.

In addition, a solenoid shaft 144 is disposed behind the lamp holding member 136 via a link member 144. The link member 144 is pin-connected to the side of the small diameter portion of the lamp holding member 136 and the side of the solenoid shaft 144, respectively.

In FIG. 9 (1), the lamp holding portion 1336 is urged forward by the compression spring 148 and is at the forward limit position. When a current is supplied to the solenoid 156 to excite it, the solenoid shaft 144 is pulled backward as shown in Fig. 9 (2), and the lamp holding member 1336 is moved to the retreat limit position. Go to At this time, since the pin 166 follows the guide groove 162, the lamp holding member 136 also moves downward. As a result, the light emitting section 130 of the HID lamp 120 is arranged at the high beam position 122. Since the vertical movement of the lamp holding member 136 is absorbed by the link member 143, the bending moment does not act on the solenoid shaft 144.

When the current supply to the solenoid 156 is stopped and the magnet is demagnetized, the lamp holding part 136 is urged by the compression spring 148 as shown in FIG. Return to. At that time, since the pin 166 follows the guide groove 162, the lamp holding member 136 also moves upward. As a result, the light emitting portion 130 of the HID lamp 120 is arranged at the passing beam position 122.

On the other hand, the entire periphery of the rear end face of the large-diameter portion of the lamp holding member 1336 is chamfered in a tapered shape to form a ramp-side rear inclined surface 1337b. A tapered guide-side rear inclined surface 133 is also formed on the entire periphery of the corner between the rear end surface and the side surface of the large-diameter cylindrical portion of the guide member 1332. When the lamp holding member 1336 moves rearward, the ramp-side rear inclined surface 1337b is guided by the guide-side rear inclined surface 133 (see FIG. 9 (1)). Further, when the lamp-side rear inclined surface 1337b and the guide-side rear inclined surface 133 come into surface contact, the lamp holding member 1336 is held at the predetermined retreat limit position. That is, the lamp holding member 13 6 is concentric with the guide member 13 2 at the retreat limit position. Held in. As a result, the light emitting portion 130 of the HID lamp 120 is arranged at the predetermined traveling beam position 123.

In addition, the entire periphery of the front end face of the large diameter portion of the lamp holding member 1336 is chamfered in a tapered shape, and the lamp-side forward slope that is oblique to the traveling direction of the lamp holding member 1336. A surface 13 7a is formed. Also, a tapered guide-side front inclined surface 113 is formed on the entire periphery of the opening of the mounting member 112. When the lamp holding member 1336 moves forward, the ramp-side front inclined surface 1337a is guided by the guide-side front inclined surface 113 (see FIG. 9 (2)). Further, when the ramp-side front inclined surface 1337a and the guide-side front inclined surface 113 come into surface contact, the lamp holding member 1336 is held at a predetermined forward limit position. That is, the lamp holding member 1336 is held concentrically with the guide member 132 at the forward limit position. As a result, the light emitting portion 130 of the HID lamp 120 is arranged at the passing beam position 122.

As described above, in the third embodiment, the pin protruding from the side surface of the lamp holding member is engaged with the guide groove formed on the side surface of the guide member, and the HID lamp is moved obliquely in the vertical direction using the link mechanism. Move to Even in this case, a taper-shaped ramp-side inclined surface is provided on the lamp holding member, and a taper for holding the lamp holding member in place by making surface contact with the ramp-side inclined surface at the limit of movement of the lamp holding member. By providing the guide-side inclined surface, the light-emitting portion of the HID lamp can be arranged at a predetermined low beam position and a predetermined low beam position. Accordingly, it is possible to form a stable passing beam and a traveling beam having good light distribution characteristics, and it is possible to use an H4-type halogen lamp by replacing it with an HID lamp. Industrial applicability

INDUSTRIAL APPLICABILITY The present invention can be used for a head lamp of a vehicle, and in particular, can be used in place of a halogen lamp of H4 type.

Claims

The scope of the claims

1. A mounting member to be attached to the rear end opening of the reflector,

A guide portion provided at a central opening of the mounting member and projecting rearward;

A lamp holding portion movably provided along the guide portion,

A lamp that is fixed to a front end of the lamp holding portion and protrudes from the front surface of the mounting member, and that is arranged in the reflection hole;

A drive unit detachably attached to the guide unit and configured to move the lamp holding unit along the guide unit;

A lamp unit characterized by having:

2. An attachment member attached to the rear end opening of the reflector,

A guide portion provided at a central opening of the mounting member, protruding rearward, and inclined at a predetermined angle with the rear end side downward;

A lamp holding portion movably provided along the guide portion,

A lamp fixed to the front end of the lamp holding portion and protruding from the front surface of the mounting member, and disposed in the reflector;

A drive unit attached to the guide unit for moving the lamp holding unit along the guide unit;

And a lamp unit.

3. The lamp unit according to claim 2,

The lamp unit, wherein the lamp is held by the lamp holding portion in parallel with an axis of the mounting member.

4. The lamp unit according to claim 2,

The lamp unit, wherein the predetermined angle is (7.56 ± 1) degrees with respect to an axis of the mounting member.

5. A lamp unit having a guide portion arranged along a moving direction of a lamp, and a lamp holding portion moving along the guide portion while holding the lamp,

While providing a tapered ramp side inclined surface in the lamp holding portion, At the movement limit of the lamp holding unit, a tapered guide-side inclined surface that holds the lamp holding unit at a predetermined position by being in surface contact with the lamp-side inclined surface is provided.

A lamp unit characterized by that.

6. The lamp unit according to claim 1, 2, or 5,

The power supply cord of the lamp is guided to the side of the guide by a code guide,

The code guide is provided with a displacement permitting portion that permits displacement of the power supply cord caused by movement of the lamp holding portion.

A lamp unit characterized by that.