JP4341537B2 - head lamp - Google Patents

Description

  The present invention relates to a headlamp. In particular, the present invention relates to a projector-type headlamp that is inexpensive to manufacture and that can accurately switch between a low beam and a high beam.

  In a conventional projector-type headlamp, a desired light distribution pattern is obtained by shielding a part of light from a light source reflected by a reflecting surface of a reflector with a shade. For this reason, when the light distribution pattern for passing and the light distribution pattern for traveling are irradiated by one headlamp, the light distribution pattern is changed by moving the shade by a solenoid or the like. However, if the shade is moved only by a switching means such as a solenoid, the position accuracy of the shade may be lowered. If the accuracy when the shade is moved is so low, the light distribution pattern may not be as designed, and in this case, the light emitted from the headlamp may become glare. It was. Therefore, some conventional headlamps use a switching means such as a solenoid and another shade operating member. For example, in Patent Document 1, the position of the shade is switched by a solenoid serving as a shade switching means and a spring member. Thereby, since the position accuracy at the time of moving a shade improves, the accuracy of a light distribution pattern can be improved.

JP 2003-59311 A

  However, in the headlamp configured as described above, there are two types of light distribution patterns at the maximum. For this reason, when three or more kinds of light distribution patterns are required for the headlamp having the above-described configuration, a solenoid that stops at three positions is used or a plurality of headlamps are required. However, when a solenoid that stops at three positions is used, the structure of the solenoid is complicated, which tends to be expensive. When a plurality of headlamps are used, the number of parts increases and the cost tends to increase. For these reasons, it has been difficult to easily obtain three or more types of light distribution patterns.

  The present invention has been made in view of the above, and an object of the present invention is to provide a headlamp capable of obtaining three types of light distribution patterns at a low manufacturing cost.

  In order to solve the above-described problems and achieve the object, a headlamp according to the present invention includes a light source, a reflector having a reflection surface based on an ellipse, and one of the light from the light source reflected by the reflection surface. A plurality of shades that form different light distribution patterns by shielding a portion, and the plurality of shades includes a first shade and a second shade, and the first shade is The first shade is formed to be operable by a first driving means for switching the first shade to a first shade first position and a first shade second position, and the second shade changes the second shade to the second shade second. The first drive means and the second drive means are configured to be operable by a second drive means that switches between a first position and a second shade second position. Are arranged so as to be independently operable, and the light distribution pattern is such that the first shade is located at the first shade first position and the second shade is located at the second shade first position. When the first shade is located at the second position of the first shade and the second shade is located at the first position of the second shade, the light distribution pattern for high speed running is obtained. The first shade is located at the first shade second position, and when the second shade is located at the second shade second position, a travel light distribution pattern is obtained.

  In the present invention, the shade is formed by the first shade and the second shade, the first shade is switched to two positions by the first driving means, and the second shade is switched to two positions by the second driving means. Is formed. In this way, by forming the first shade and the second shade so that they can be switched to two positions, respectively, the passing light distribution pattern and the high-speed running distribution can be obtained depending on the positional relationship between the first shade and the second shade. Three types of light distribution patterns can be formed: a light pattern and a traveling light distribution pattern. In this way, three types of light distribution patterns can be formed by operating the first shade with the first driving means and the second shade with the second driving means. Three types of light distribution patterns can be formed without using a plurality of headlamps. As a result, three types of light distribution patterns can be obtained at a low manufacturing cost. Further, since the first driving means operates only the first shade and the second driving means operates only the second shade, the outputs of the first driving means and the second driving means operate one shade respectively. It is enough to have enough output. For this reason, both the first driving means and the second driving means can be reduced in size and weight. As a result, the headlamp can be reduced in size and weight. Further, when the weights of the first shade and the second shade are approximately the same, the first drive means and the second drive means can be the same, and the peripheral parts can also use common parts. it can. As a result, the manufacturing cost can be more reliably reduced.

  In the headlamp according to the present invention, the first shade is formed so as to be switched between the first shade first position and the first shade second position by rotating. The shade is formed to be switched between the second shade first position and the second shade second position by rotating, and the first shade and the second shade have the same rotation axis. And are formed so as to be independently rotatable.

  In the present invention, the first shade and the second shade are formed so as to be able to be switched by rotating, and further, the first shade and the second shade are rotated about the same rotation axis. The relative positional accuracy when rotating can be improved. In addition, since the first shade and the second shade are formed so as to be independently rotatable, it is possible to reduce the influence received when the other shades rotate, and the accuracy when the shade rotates is improved. Improvements can be made. As a result, irradiation can be performed with a highly accurate light distribution pattern.

  The headlamp according to the present invention applies an urging force to the first shade and the second shade in a rotation direction around the rotation axis, and the first shade and the second shade. And a biasing means for applying a biasing force in the axial direction of the rotary shaft, and a movement of the first shade in a direction in which the biasing force is given in the axial direction of the rotary shaft by the biasing means. A first shade restricting portion; and a second shade restricting portion for restricting movement of the second shade in a direction in which an urging force is applied in an axial direction of the rotation shaft by the urging means. And

  In the present invention, the first shade and the second shade are both given a biasing force in the axial direction of the rotating shaft by the biasing means, and each of the movements in the direction in which the biasing force is given is first. It is regulated by the first shade regulating unit or the second shade regulating unit. For this reason, the backlash of the rotating shaft in the axial direction is suppressed, and a more accurate light distribution pattern can be formed. Further, the first shade and the second shade are biased in the axial direction of the rotating shaft by a biasing means that applies a biasing force in the rotational direction to the first shade and the second shade. Thereby, it is not necessary to provide an independent urging means when the urging force is applied to the first shade and the second shade in the axial direction of the rotation shaft. As a result, it is possible to irradiate with a highly accurate light distribution pattern at a low manufacturing cost.

  The headlamp according to the present invention has an effect that three kinds of light distribution patterns can be obtained at a low manufacturing cost.

  Hereinafter, embodiments of a headlamp according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same. In the following description, the front, rear, left side, right side, upper side, and lower side of a vehicle equipped with the headlamp of the present invention will be described as front, rear, left side, right side, upper side, and lower side in the headlamp. . Furthermore, in the following description, a headlamp that is installed in an automobile traveling on a left-handed road will be described.

  FIG. 1 is a cross-sectional view of a headlamp according to an embodiment of the present invention. The headlamp 1 shown in the figure includes a reflector 10, a discharge bulb 13 as a light source, a condenser lens 15 provided in front of the reflector 10 and irradiating reflected light from the reflector 10 in a predetermined direction, and a discharge bulb. 13 and the condensing lens 15 are formed of a first shade 21 and a second shade 41, and a frame 16 for fixing them together. The first shade 21 and the second shade 41 are both attached to a shade frame 70 so as to be rotatable. Further, a solenoid 80 serving as a driving means is provided on the shade frame 70 with the first shade 21 and the second shade. The shade frame 70 is fixed to the frame 16.

  A reflective surface 11 is formed on the inner surface of the reflector 10 by aluminum vapor deposition or the like. Further, an insertion hole 12 for the discharge bulb 13 is formed near the rear end of the reflector 10, and the discharge bulb 13 is inserted through the insertion hole 12 and fixed to the reflector 10. The discharge bulb 13 is connected to a bulb socket (not shown) that is electrically connected to a power source (not shown).

  The shape of the reflecting surface 11 has two focal points of a first focal point F1 and a second focal point F2 on a central line (optical axis) 5 and is based on a spheroid having the central line 5 as a central axis. It has become a part of. The light emitting part 14 of the discharge bulb 13 is located in the vicinity of the first focus F1. Near the second focal point F2, when the second shade 41 is located at a second shade first position, which will be described later, the vicinity of the upper end of the second shade 41 is located. Thus, the second shade 41 is in the second position. When located at the shade first position, the position of the second shade 41 in the front-rear direction is substantially the same position as the second focal point F2. The first focal point F1 and the second focal point F2 are optical reference points that are the reference for determining the shape of the reflecting surface 11.

  The first shade 21 is formed of a front first shade 22 and a rear first shade 23, and the first shade 21 is positioned at a first shade first position described later. The first shade 21 is in the vicinity of the second shade 41 located at the second shade first position as described above, and the front first shade 22 is the front side of the second shade 41 and the rear first shade 23. Is located on the rear side of the second shade 41. That is, the second shade 41 is located between the front first shade 22 and the rear first shade 23 in the front-rear direction.

  A frame 16 is provided in front of the reflector 10, and a condensing lens 15 is provided at the front end thereof, that is, in front of the second focal point F2. The condenser lens 15 is an aspherical lens and is made of a transparent material such as glass. The shape is a substantially circular convex lens shape, and is provided with the convex side facing forward.

  FIG. 2 is a cross-sectional view taken along the line AA of FIG. 3 is a BB arrow view of FIG. FIG. 4 is a perspective view of the first shade, the second shade, and the solenoid. As described above, the first shade 21 is formed of the front first shade 22 and the rear first shade 23, and the front first shade 22 and the rear first shade 23 are both substantially rectangular plates. It is formed in a shape and is connected near the lower part of both ends in the left-right direction. At that time, the front first shade 22 and the rear first shade 23 are connected with a space therebetween. Similarly, the second shade 41 is formed in a substantially rectangular plate shape, and the second shade 41 is positioned in a space between the front first shade 22 and the rear first shade 23. Is provided.

  A rotating shaft 90 is fixed to the shade frame 70, and the first shade 21 and the second shade 41 are attached to the rotating shaft 90 so as to be rotatable. Specifically, the rotating shaft 90 is fixed to the shade frame 70 in a direction extending in the left-right direction in the headlamp 1. In addition, a first shade pressing portion 27 is formed in the first shade 21 near the lower portion of the first shade 21. The first shade pressing portion 27 has a plate-like shape and protrudes forward, and is formed so that the plane of the plate faces in the vertical direction, and the lower surface is formed as a biasing surface 28.

  Similarly, a second shade pressing portion 44 is formed in the second shade 41 near the lower portion of the second shade 41. The second shade pressing portion 44 has a plate shape and protrudes forward, and is formed in a direction in which the flat surface of the plate faces in the vertical direction, and the lower surface is formed as a biasing surface 45. The first shade pressing portion 27 and the second shade pressing portion 44 formed as described above are formed at different positions in the left-right direction. That is, the first shade pressing portion 27 and the second shade pressing portion 44 are formed by being divided into a left side direction and a right side direction near the center of the first shade 21 or the second shade 41 in the left-right direction.

  Further, since the second shade 41 is located between the front first shade 22 and the rear first shade 23, the front first shade 22 is located in front of the second shade 41. ing. For this reason, a notch portion 25 that is notched upward is formed on the lower portion of the front first shade 22 on the side where the second shade pressing portion 44 is formed in the left-right direction. The 2-shade push part 44 is formed from the vicinity of the notch part 25 toward the front. As described above, the first shade pressing portion 27 and the second shade pressing portion 44 that are formed to protrude forward from the first shade 21 or the second shade 41 have positions in the vertical direction and respective front end portions in the front-rear direction. Are formed so as to be substantially the same position.

  A first shade bearing portion 24 is formed on the surface facing the upper side of the first shade pressing portion 27. The first shade bearing portion 24 is formed at two locations on the surface facing the upper side of the first shade pressing portion 27 and is located near both ends in the left-right direction. Similarly, the second shade pressing portion 44 has two shade bearing portions 42 formed at two locations, and the second shade bearing portion 42 is a surface on the side facing the upper side of the second shade pressing portion 44. Is located near both ends in the left-right direction.

  Further, each of the first shade bearing portion 24 and the second shade bearing portion 42 is formed with a hole (not shown) that is slightly larger than the rotation shaft 90. This hole is opened in a direction penetrating in the left-right direction, and when the second shade 41 is located between the front first shade 22 and the rear first shade 23 as described above, the up-down direction and the front-back direction It is formed so that the directions are almost the same position. Thereby, the said rotating shaft 90 can penetrate both the holes of the 1st shade bearing part 24 and the 2nd shade bearing part 42, and this rotating shaft 90 has penetrated both these holes. Further, the shade frame 70 has a side wall portion 71 whose both ends in the left-right direction are bent forward, and the rotation shaft 90 is located between the side wall portions 71, and the rotation shaft 90 is located on the side wall portion 71. The both ends of 90 are fixed to the shade frame 70. Thereby, the 1st shade 21 and the 2nd shade 41 are attached so that rotation with respect to the shade frame 70 centering | focusing on the rotating shaft 90 is possible.

  The shade frame 70 is formed with shade restricting portions 74 at both ends of the first shade 21 and the second shade 41 in the left-right direction. That is, the shade restricting portions 74 are provided at two locations, and the two shade restricting portions 74 are spaced slightly wider than the widths of the first shade 21 and the second shade 41 in the left-right direction. As described above, the shade restricting portion 74 passes the rotating shaft 90 through the holes of the first shade bearing portion 24 and the second shade bearing portion 42, and both ends of the rotating shaft 90 are fixed to the side wall portion 71 of the shade frame 70. The first shade 21 and the second shade 41 are provided at both ends in the left-right direction. Thereby, the movement of the first shade 21 and the second shade 41 in the axial direction or the left-right direction of the rotating shaft 90 is restricted, and the position in the same direction is restricted.

  A shade spring 60 is provided between the first shade pressing portion 27 and the second shade pressing portion 44 in the left-right direction. The shade spring 60 is fixed near the center of the shade frame 70 in the left-right direction by a spring fixing portion 73 protruding forward, and the fixing portion 63 of the shade spring 60 is fixed to the spring fixing portion 73. It is fixed by.

  The solenoid 80 is provided below the first shade pushing portion 27 and the second shade pushing portion 44, and the solenoid 80 is a first solenoid 81 serving as a first driving means and a second solenoid serving as a second driving means. A solenoid 85 is provided. Among these, the first solenoid 81 is provided below the first shade pushing portion 27, and the second solenoid 85 is provided below the second shade pushing portion 44. Both the first solenoid 81 and the second solenoid 85 are fixed to the shade frame 70. The first solenoid 81 has a first plunger 82 serving as a first operating portion. The first plunger 82 protrudes above the first solenoid 81 and is provided so as to be extendable in the vertical direction. Similarly, the 2nd solenoid 85 has the 2nd plunger 86 used as the 2nd operation part, the 2nd plunger 86 protrudes above the 2nd solenoid 85, and is provided so that expansion and contraction is possible in the up-and-down direction.

  The first solenoid 81 and the second solenoid 85 are formed with substantially the same size, and the vertical strokes of the first plunger 82 and the second plunger 86 are substantially the same. Further, the first solenoid 81 and the second solenoid 85 are provided so that the vertical positions of both tip portions are the same when the first plunger 82 and the second plunger 86 are both contracted. . Further, when the first plunger 82 extends upward, the tip portion of the first solenoid 81 comes into contact with the urging surface 28 of the first shade pressing portion 27 so that the urging force is applied to the urging surface 28. When the second plunger 86 extends upward, the second solenoid 85 comes into contact with the urging surface 45 of the second shade pressing portion 44 and is urged against the urging surface 45. It is formed to give power.

  FIG. 5 is a detailed view of attaching the shade spring. The shade spring 60 has a coil portion 64 formed in a coil shape above the fixed portion 63 and at two positions in the left-right direction. That is, the two coil parts 64 are connected by the fixing part 63 located below between them. In addition, from the two coil portions 64, rotation direction urging portions 65 are respectively formed outward in the left-right direction. In the shade spring 60 formed as described above, the fixing portion 63 of the shade spring 60 is fixed to the spring fixing portion 73 provided on the shade frame 70 as described above, and above the spring fixing portion 73. The rotating shaft 90 passes through the coil portion 64 positioned. The two coil portions 64 are located between the first shade pressing portion 27 and the second shade pressing portion 44, and are formed from the coil portion 64 outward in the left-right direction. The moving direction biasing portion 65 is located on the upper surfaces of the first shade pressing portion 27 and the second shade pressing portion 44. The rotation direction urging portion 65 is formed by the first shade pressing portion 27 or the second shade pressing portion 44 in the rotation direction in which the upper end portion of the first shade 21 or the upper end portion of the second shade 41 is inclined forward. Is given an urging force against. Further, since the coil portions 64 are formed at two locations, the rotation direction biasing portions 65 formed on the respective coil portions 64 are relative to the first shade pressing portion 27 or the second shade pressing portion 44. Energizing power is given independently.

  The coil portion 64 is positioned between the first shade pressing portion 27 and the second shade pressing portion 44, but the two coil portions 64 are respectively the first shade pressing portion 27 or the second shade. The inner portion of the pressing portion 44, that is, the end portion on the second shade pressing portion 44 side of the first shade pressing portion 27 and the end portion on the first shade pressing portion 27 side of the second shade pressing portion 44 are in contact. . The coil portion 64 formed in this manner is in contact with the first shade pressing portion 27 or the second shade pressing portion 44 so that the axial length of the rotating shaft 90 is reduced. For this reason, the coil part 64 is giving the urging | biasing force to the axial direction of the rotating shaft 90 with respect to the 1st shade press part 27 and the 2nd shade press part 44, ie, the direction which spreads in the left-right direction, A portion in contact with the first shade pressing portion 27 or the second shade pressing portion 44 is formed as an axial direction urging portion 66. That is, the first shade pushing portion 27 and the second shade pushing portion 44 are given a biasing force in a direction extending in the left-right direction by the axial biasing portion 66 of the shade spring 60. The first shade 21 and the second shade 41 are given outward urging force in the axial direction of the rotating shaft 90 or in the left-right direction.

  Thus, the shade restricting portion 74 is provided at the end portions in the left and right direction of the first shade 21 and the second shade 41 to which the urging force is given in the left and right direction, and the urging force in the left and right direction is provided. When the end portion of the given first shade 21 or second shade 41 abuts against the shade restricting portion 74, the left and right movements of the first shade 21 and the second shade 41 are restricted. Specifically, the shade restricting portion 74 that is positioned in the direction in which the first shade 21 moves in the left-right direction by the biasing force in the left-right direction of the shade spring 60 is formed as the first shade restricting portion 75, and similarly. In addition, the shade restricting portion 74 located in the direction in which the second shade 41 moves in the left-right direction is formed as a second shade restricting portion 76 by the biasing force in the left-right direction of the shade spring 60 (see FIG. 3). ). The movement of the first shade 21 in the left-right direction is restricted by the end portion of the first shade 21 to which the urging force in the left-right direction is applied by the shade spring 60 being in contact with the first shade restricting portion 75, and the shade spring When the end portion of the second shade 41 to which the urging force in the left-right direction is applied by 60 abuts on the second shade restriction portion 76, the movement of the second shade 41 in the left-right direction is restricted.

  FIG. 6 is a detailed view of part C of FIG. An upper edge portion of the first shade 21 is provided with a passing edge 31 that forms a cut-off line 101 of a passing light distribution pattern 100 to be described later when the headlamp 1 is turned on. A high-speed running edge 51 that forms a cut-off line 111 of a high-speed running light distribution pattern 110 (described later) when the headlamp 1 is turned on is provided at the upper end portion. The passing edge 31 is formed in the same shape on the front first shade 22 and the rear first shade 23. The passing edge 31 is different in height in the vertical direction from the vicinity of the central portion in the left-right direction, and the portion located in the left side direction of the automobile is higher than the portion located in the right direction. ing. In other words, the traveling lane side passing edge 32 positioned on the traveling lane side is positioned higher than the opposing lane side passing edge 33 positioned on the facing lane. Thus, the traveling lane side passing edge 32 and the opposite lane side passing edge 33 having a step in the vertical direction are located near the center of the passing edge 31 in the left-right direction, and the traveling lane side passing edge. 32 and the opposite lane side passing edge 33 are connected by a passing edge inclined portion 34 formed in an oblique direction.

  Similarly to the passing edge 31, the high-speed running edge 51 provided at the upper end portion of the second shade 41 is different in height in the vertical direction from the vicinity of the central portion in the left-right direction. The portion located in the direction is higher than the portion located in the right direction. In other words, the traveling lane side high speed traveling edge 52 located on the traveling lane side is located above the opposing lane side high speed traveling edge 53 located on the opposing lane side, and the traveling lane side The high-speed traveling edge 52 and the opposite lane side high-speed traveling edge 53 are connected by a high-speed traveling edge inclined portion 54 that is located in the vicinity of the center in the left-right direction of the high-speed traveling edge 51 and is formed in an oblique direction. . Further, the step between the traveling lane side high speed traveling edge 52 and the opposite lane side high speed traveling edge 53 is smaller than the level difference between the traveling lane side passing edge 32 and the opposing lane side passing edge 33.

  The headlamp 1 according to this embodiment is configured as described above, and the operation thereof will be described below. When the headlamp 1 irradiates the passing beam, the solenoid 80 is operated so that the first plunger 82 of the first solenoid 81 and the second plunger 86 of the second solenoid 85 contract together. In a state where the first plunger 82 of the first solenoid 81 and the second plunger 86 of the second solenoid 85 are both contracted, the first plunger 82 and the second plunger 86 are in the vertical direction of the tip portion as described above. The positions are formed to be the same position.

  FIG. 7 is a cross-sectional view taken along the line DD of FIG. 2 and shows a state during irradiation of the passing beam. Further, both the first shade 21 and the second shade 41 are given a biasing force in the above-described rotation direction by the shade spring 60. Therefore, the first shade 21 has a passing edge 31 at the top, the second shade 41 has a high-speed running edge 51 at the top, and each of the first shade 21 and the second shade 41 has a shape. Are formed along the vertical direction, and are arranged almost in parallel. This state of the first shade 21 is the first shade first position, and this state of the second shade 41 is the second shade first position. In this state, the first plunger 82 of the first solenoid 81 and the second plunger 86 of the second solenoid 85 are both contracted. In this state, the first plunger 82 is in contact with the urging surface 28 of the first shade pressing portion 27 formed on the first shade 21 without applying an urging force, or is separated from the urging surface 28. ing. Similarly, the second plunger 86 is in contact with the urging surface 45 of the second shade pressing portion 44 formed on the second shade 41 without applying an urging force, or separated from the urging surface 45. Yes. Further, in the second shade 41 in this state, the high-speed traveling edge 51 located at the upper end portion is located on the second focus F2 or in the vicinity of the second focus F2, and the first shade 21 is located at the upper end portion. The passing edge 31 is located in front of and behind the second focal point F2 (see FIG. 1).

  Further, in a state where the first shade 21 is located at the first shade first position and the second shade 41 is located at the second shade first position, the passing edge 31 formed on the first shade 21 is All are located above the high-speed running edge 51 formed in the second shade 41 (see FIG. 6). In this state, when the headlamp 1 is turned on, first, the light emitting unit 14 in the discharge bulb 13 is turned on. When the light emitting unit 14 is turned on, a part of the light from the light emitting unit 14 is directed toward the reflecting surface 11 of the reflector 10 and reflected by the reflecting surface 11. The shape of the reflecting surface 11 is formed in a part of a shape based on a rotation ellipse having the first focal point F1 and the second focal point F2 as optical reference points, and is therefore located near the first focal point F1. When the light from the light emitting unit 14 is reflected by the reflecting surface 11, the reflected light travels in the direction of the second focal point F2.

  Further, since the reflecting surface 11 is formed based on the ellipse as described above, the light reflected by the reflecting surface 11 intersects at the second focal point F2. For example, light reflected by the upper half portion of the reflecting surface 11 is reflected toward the lower direction, and light reflected by the lower half portion of the reflecting surface 11 is reflected toward the upper direction. Of the light, the light traveling in the direction of the second focal point F2 after reflection intersects when passing through the second focal point F2. Thus, after passing through the second focal point F2, the light reflected by the upper half portion of the reflecting surface 11 proceeds in the lower direction, and the light reflected by the lower half portion of the reflecting surface 11 proceeds in the upper direction. .

  Here, the 2nd shade 41 is provided in the 2nd focus F2 vicinity, and also the 1st shade 21 is provided in the front and back. The first shade 21 and the second shade 41 are provided with a passing edge 31 or a high-speed running edge 51 at the upper end portion, and the passing edge 31 and the high-speed running edge 51 are positioned near the second focal point F2. Therefore, most of the first shade 21 and the second shade 41 are located below the second focal point F2. For this reason, the light reflected by the lower half portion of the reflecting surface 11 is blocked by the first shade 21 or the second shade 41.

  When a part of the light reflected by the reflecting surface 11 is blocked by the first shade 21 or the second shade 41 as described above, the passing edge 31 is above the high-speed running edge 51 as described above. Therefore, the light reflected by the reflecting surface 11 is blocked in a shape along the shape of the passing edge 31 at the boundary with the portion where the light is blocked. At that time, since the passing edge 31 is located slightly forward and rearward of the second focus F2, the boundary portion thereof is slightly blurred. The first shade 21 is formed by a front first shade 22 and a rear first shade 23 positioned before and after the second focal point F2, and a passing edge 31 is formed by the front first shade 22 and the rear first shade. 23, the light shielding by the first shade 21 has an achromatic action. For this reason, coloring to the boundary part of the light shielded by the first shade 21 is suppressed.

  The light reflected by the reflecting surface 11 is blocked in this way and then travels toward the condenser lens 15. The light reflected by the reflecting surface 11 travels to the second focal point F2 while condensing to the second focal point F2, and proceeds in the direction of the condensing lens 15 while diffusing after passing through the second focal point F2. Then, when the light reaches the condensing lens 15 and passes through the condensing lens 15, the direction of the light is changed to irradiate the front as substantially parallel light.

  FIG. 8 is a diagram showing a light distribution pattern of the passing beam. The light reflected by the reflecting surface 11 is directed to the front of the condenser lens 15 because only the light without the first shade 21 or the second shade 41 is directed toward the condenser lens 15 and is emitted forward from the condenser lens 15. The irradiated light is irradiated in a shape opposite to the shape of the first shade 21 or the second shade 41. Further, since the irradiation light is shielded by the shape of the passing edge 31 as described above, the irradiation light is irradiated in the shape opposite to the shape of the first shade 21. That is, the irradiation light irradiates generally below the HH line that is the center in the vertical direction in front of the automobile, so the light distribution pattern is substantially below the HH line, and the left side of the automobile, that is, the traveling lane side. Only slightly above the HH line is irradiated. By irradiating the irradiation light in this range, the irradiation light of the headlamp 1 becomes a passing beam, so that the light distribution pattern becomes a passing light distribution pattern 100.

  The shape of the upper part of the light distribution pattern 100 for passing, that is, the cutoff line 101, is the opposite lane side horizontal cutoff line 102 which is the right side part of the cutoff line 101, and the traveling lane side horizontal cutoff line 103 which is the left side part of the cutoff line 101. It is formed lower than. The traveling lane side horizontal cut-off line 103 is located slightly above the HH line. In this way, the traveling lane side horizontal cutoff line 103 and the opposite lane side horizontal cutoff line 102 having a step in the vertical direction are located between them, and are connected by the inclined cutoff line 104 formed to be inclined in the oblique direction. . The inclined cutoff line 104 corresponds to the passing edge inclined portion 34. Further, the inclined cut-off line 104 is located on the VV line, which is the center in the left-right direction in front of the automobile.

  When the headlamp 1 irradiates the passing beam, both the first plunger 82 of the first solenoid 81 and the second plunger 86 of the second solenoid 85 are contracted, and the first shade 21 is moved to the first shade first. When the second shade 41 is positioned at the second shade first position, the light distribution pattern becomes the passing light distribution pattern 100 as described above. Further, in the cut-off line 101 of the passing light distribution pattern 100, the light shielding by the passing edge 31 is blocked in a state where the boundary portion is slightly blurred, so that the cut-off line 101 is also slightly blurred. Further, since the front first shade 22 and the rear first shade 23 are achromatic, coloring to the cut-off line 101 is suppressed.

  In such a light distribution pattern 100 for passing, the left side of the VV line irradiates slightly above the HH line, and the right side is separated downward from the HH line. The passing beam is not irradiated near the HH line on the right side of the line. Even in the case where the right lane is an oncoming lane, in the passing light distribution pattern 100, the oncoming lane near the center in the vertical direction is not irradiated with the passing beam in this way. It does not illuminate near the driver's seat and does not shine against oncoming vehicles. Further, in the passing light distribution pattern 100, only the traveling lane side horizontal cut-off line 103 irradiates slightly above the H-H line, so that it does not irradiate the door mirror of the preceding vehicle, and the passing beam is ahead. There is no glare against the car.

  FIG. 9 is a cross-sectional view taken along the line DD of FIG. 2 and shows a state during irradiation with a high-speed traveling beam. When the headlamp 1 irradiates the high-speed traveling beam, the second solenoid 85 is not operated, only the first solenoid 81 is operated, and only the first plunger 82 is extended upward. As a result, the biasing surface 28 of the first shade pressing portion 27 provided in the first shade 21 is pushed upward by the first plunger 82, and the first shade 21 is moved rearward to the first shade pressing portion 27. A biasing force in the direction of tilting is provided. When an urging force in this direction is applied to the first shade pressing portion 27, the first shade 21 is inclined in the direction in which the first shade 21 is tilted backward as described above about the rotation shaft 90. Rotate. This rotation is performed until the first plunger 82 is extended, and when the first plunger 82 is extended, the first shade 21 is moved in the direction opposite to the rotation direction by the urging force of the first plunger 82. Since the urging force is applied by the rotation direction urging portion 65 of the spring 60, the rotation of the first shade 21 is stopped when the first plunger 82 is fully extended.

  Even when the first solenoid 81 is actuated to rotate the first shade 21 in this way, the first shade 21 is given a biasing force in the left-right direction by the shade spring 60, and the first shade 21 The movement of 21 in the direction of the urging force is restricted by the first shade restricting portion 75 located in the direction of the urging force (see FIG. 3). For this reason, even when the first shade 21 is rotated, the first shade 21 rotates without moving or rattling in the left-right direction, that is, the axial direction of the rotation shaft 90.

  Further, when the headlamp 1 irradiates the high-speed traveling beam, the second solenoid 85 is not operated, that is, the second plunger 86 is contracted, and the first shade 21 and the second shade 41 is formed so as to be rotatable independently of each other, so that the second shade 41 does not change from the state when the passing beam is irradiated. For this reason, the high-speed running edge 51 located at the upper end portion of the second shade 41 is located on the second focal point F2 or in the vicinity of the second focal point F2.

  As described above, when the first shade 21 rotates and the first shade 21 tilts backward, the upper end portion of the first shade 21, that is, the passing edge 31 changes in height in the vertical direction, The passing edge 31 moves downward. This state of the first shade 21 is the first shade second position. Further, when only the first solenoid 81 is operated and only the first plunger 82 is extended upward, the second shade 41 does not rotate, so the second shade 41 is positioned at the second shade first position.

  FIG. 10 is a detailed view of part C in FIG. 2 and shows a state at the time of irradiation with a high-speed traveling beam. The detailed position of the first shade 21 in this state is such that all portions of the passing edge 31 are located below the high-speed running edge 51. Specifically, the step between the traveling lane side passing edge 32 and the opposite lane side passing edge 33 of the first shade 21 is different from the traveling lane side high speed traveling edge 52 and the opposite lane side high speed traveling of the second shade 41. Since the difference between the edge 53 and the edge 53 is larger, the traveling lane side passing edge 32 of the first shade 21 is positioned below the traveling lane side high speed traveling edge 52 of the second shade 41, thereby All parts are located below the high-speed running edge 51. Thus, the opposite lane side high speed traveling edge 53 of the second shade 41 when the first shade 21 is located at the first shade second position and the second shade 41 is located at the second shade first position is When the first shade 21 is located at the first shade first position, the position of the opposite lane side passing edge 33 of the first shade 21 and the position in the vertical direction are substantially the same.

  The step between the traveling lane side high speed traveling edge 52 and the opposite lane side high speed traveling edge 53 of the second shade 41 is different from the traveling lane side passing edge 32 and the opposing lane side passing edge 33 of the first shade 21. Therefore, the first shade 21 is the first shade second than the position in the vertical direction of the traveling lane side passing edge 32 when the first shade 21 is located at the first shade first position. When the second shade 41 is located at the second shade first position, the traveling lane side high speed traveling edge 52 of the second shade 41 is located below. Accordingly, when the first shade 21 is positioned at the first shade first position while the second shade 41 is positioned at the second shade first position, and when the first shade 21 is positioned at the first shade second position. When compared with the case where the opposite lane side of the upper part of the shade is compared, the opposite lane side passing edge 33 of the first shade 21 or the opposite lane side high speed traveling edge 53 of the second shade 41 is substantially the same height. Is located at.

  On the other hand, in the portion on the traveling lane side of the upper part of the shade, the first shade 21 is the first shade than the traveling lane side passing edge 32 when the first shade 21 is located at the first shade first position. The traveling lane side high-speed traveling edge 52 of the second shade 41 when positioned at the second position is positioned below. In other words, when the first shade 21 is located at the first shade second position, only the portion on the traveling lane side generally above the shade is compared with the case where the first shade 21 is located at the first shade first position. Will be located below.

  FIG. 11 is a diagram showing a light distribution pattern of a high-speed traveling beam. The light that is emitted from the light emitting unit 14 when the discharge bulb 13 is turned on is reflected by the reflecting surface 11 and travels in the direction of the second focal point F2 as described above. Of the light that travels in this direction, the reflected light is reflected. The light reflected by the lower half portion of the surface 11 is blocked by the second shade 41 or the first shade 21. At that time, since all the portions of the passing edge 31 are located below the high-speed running edge 51, the light reflected by the reflecting surface 11 is a boundary portion with the portion where the light is blocked. Is obstructed by a shape along the shape of the edge 51 for high-speed traveling. At that time, since the position in the front-rear direction of the high-speed running edge 51 is substantially the same as the second focal point F2, the boundary portion is blocked so that the brightness is clearly separated. Further, the light reflected by the reflecting surface 11 and having passed through the second focal point F2 is directed in the direction of the condensing lens 15 as in the case of passing the passing beam, and is substantially parallel when passing through the condensing lens 15. And illuminate the front. Since this irradiation light is shielded by the second shade 41, it is irradiated in a shape opposite to the shape of the second shade 41. Specifically, most of the irradiation light irradiates below the HH line in front of the automobile.

  Further, the first shade 21 is located at the first shade second position than the traveling lane side passing edge 32 of the passing edge 31 when the first shade 21 is located at the first shade first position. In this case, the traveling lane side high speed traveling edge 52 of the high speed traveling edge 51 is lower in the vertical direction, so the portion on the opposite lane side above the light distribution pattern is opposite to the passing light distribution pattern 100. It becomes higher than the lane side horizontal cut-off line 102. Further, when the first shade 21 is positioned at the first shade first position, the opposite lane side passing edge 33 of the passing edge 31 and the first shade 21 are positioned at the first shade second position. In this case, since the position in the vertical direction of the opposite lane side high speed traveling edge 53 of the high speed traveling edge 51 is substantially the same, the portion on the traveling lane side above the light distribution pattern is the light distribution pattern for passing. It becomes substantially the same position as 100 travel lane side horizontal cut-off line 103. By forming the light distribution pattern in this manner, the light distribution pattern when the first shade 21 is positioned at the first shade second position and the second shade 41 is positioned at the second shade first position is as follows. Thus, the light distribution pattern 110 for high speed running is obtained.

  The upper shape of the light distribution pattern 110 for high-speed travel, that is, the cut-off line 111 is similar to the cut-off line 101 of the light distribution pattern 100 for passing. Is also formed low. The traveling lane side horizontal cutoff line 113 is located slightly above the HH line. Furthermore, the driving lane side horizontal cut-off line 113 and the opposite lane side horizontal cut-off line 112 are formed to be inclined in an oblique direction corresponding to the high-speed driving edge inclined portion 54 and are the center in the left-right direction in front of the automobile. They are connected by an inclined cut-off line 114 located on the VV line.

  When the headlamp 1 irradiates the beam for high-speed travel, the first plunger 82 of the first solenoid 81 is extended and the second plunger 86 of the second solenoid 85 is contracted, so that the first shade 21 is the first shade 21. The second shade 41 is positioned at the second position of the shade, and the second shade 41 is positioned at the first position of the second shade. As a result, the light distribution pattern becomes the light distribution pattern 110 for high-speed traveling as described above. The cut-off line 111 of the high-speed running light distribution pattern 110 is also clear because the light shielding by the high-speed running edge 51 is shielded in a state where the boundary portion is clearly separated from light and dark. It becomes a state.

  In such a high-speed light distribution pattern 110, the oncoming lane side horizontal cut-off line 112 is positioned above the oncoming lane side horizontal cut-off line 102 of the passing light distribution pattern 100, so this portion is a passing beam. The high-speed traveling beam irradiates far away. For this reason, it becomes easy to visually recognize a distant place. Further, the opposite lane side horizontal cut-off line 102 of the light distribution pattern 110 for high-speed traveling irradiates above the same portion of the passing light distribution pattern 100, and therefore, the opposite lane side is more irradiated than when passing the passing beam. However, since the cut-off line 111 of the light distribution pattern 110 for high-speed traveling is clearly bright and dark, it does not become glare with respect to the oncoming vehicle. Further, the traveling lane side horizontal cut-off line 113 of the light distribution pattern 110 for high-speed traveling is almost the same height as the horizontal cut-off line 103 for the traveling lane side of the light distribution pattern 100 for passing, so the beam for high-speed traveling is the preceding vehicle. It will not be glare.

  FIG. 12 is a cross-sectional view taken along the line DD of FIG. 2 and shows a state when the traveling beam is irradiated. When the headlamp 1 irradiates the traveling beam, the first solenoid 81 remains in the state of irradiation with the high-speed traveling beam, that is, with the first plunger 82 extended upward. And the second plunger 86 is extended upward. As a result, the urging surface 45 of the second shade pushing portion 44 provided in the second shade 41 is pushed upward by the second plunger 86, and the second shade 41 is moved backward to the second shade pushing portion 44. A biasing force in the direction of tilting is provided. When an urging force in this direction is applied to the second shade pressing portion 44, the second shade 41 is inclined in the direction in which the second shade 41 tilts rearward as described above about the rotation shaft 90. Rotate. This rotation is performed until the second plunger 86 is fully extended. When the second plunger 86 is fully extended, the second shade 41 is moved in the direction opposite to the rotation direction by the urging force of the second plunger 86. Since the urging force is applied by the rotation direction urging portion 65 of the spring 60, the rotation of the second shade 41 stops when the second plunger 86 is fully extended.

  Further, even when the second shade 41 is rotated by the operation of the second solenoid 82 in this way, the second shade 41 is given a biasing force in the left-right direction by the shade spring 60, and the second shade 41 The movement of 41 in the direction of the urging force is restricted by the second shade restricting portion 76 located in the direction of the urging force (see FIG. 3). For this reason, even if the 2nd shade 41 rotates, it moves in the left-right direction, ie, the axial direction of the rotating shaft 90, without rotating or rattling.

  When the second plunger 86 is extended in this way and the second shade 41 is rotated and tilted backward, the upper end portion of the second shade 41, that is, the high-speed running edge 51 is height in the vertical direction. Changes and the high-speed running edge 51 moves downward. In addition, when the second shade 41 is located at the second shade first position, the high-speed traveling edge 51 located in the vicinity of the second focal point F2 is caused by the second shade 41 tilting backward, It is located below the second focal point F2. Further, in the first shade 21, the first plunger 82 of the first solenoid 81 is extended upward, so that the passing edge 31 is positioned below the second focal point F <b> 2. As a result, both the passing edge 31 and the high-speed running edge 51 are positioned below the second focal point F2. In addition, the state in which the second shade 41 is rotated backward is the second shade second position, and the first shade 21 is the same as the state at the time of high-speed traveling beam irradiation. One shade 21 is in the first shade first position.

  FIG. 13 is a diagram illustrating a light distribution pattern of a traveling beam. The discharge bulb 13 is turned on, and the light emitted from the light emitting unit 14 is reflected by the reflecting surface 11 and travels in the direction of the second focal point F2 as described above. Of this light, the light reflected by the lower half of the reflecting surface 11 is blocked by the first shade 21 or the second shade 41 when passing the low beam or the high speed beam. At the time of beam irradiation, both the first shade 21 and the second shade 41 are all located below the second focal point F2. Thereby, the light shielded by the first shade 21 and the second shade 41 is directed forward from the second focal point F2 when the passing beam irradiation or the high-speed traveling beam irradiation is performed. As described above, most of the light reflected by the reflecting surface 11 is directed to the condenser lens 15 without being blocked by the first shade 21 or the second shade 41, and passes through the condenser lens 15. Irradiates the front in the form of substantially parallel light. Since this irradiation light is hardly shielded by the first shade 21 and the second shade 41, it irradiates both above and below the HH line in front of the automobile.

  In the passing beam and the high-speed traveling beam, a part of the light reflected by the reflecting surface 11 is shielded by the first shade 21 and the second shade 41, so that the irradiation light that irradiates the front is almost under the front of the automobile. Although only on the half side, in the traveling beam, since the light reflected by the reflecting surface 11 is not shielded by the first shade 21 or the second shade 41, the irradiation light is not only on the lower half side in front of the automobile but also on the upper half side. Also irradiate. For this reason, the light distribution pattern has a form in which the upper side of the H-H line is added to the light distribution pattern for passing 100 or the light distribution pattern for high-speed traveling 110 as an irradiation range. By forming the light distribution pattern in this way, the light distribution pattern when the first shade 21 is positioned at the first shade second position and the second shade 41 is positioned at the second shade second position is as follows: A light distribution pattern 120 for travel is obtained. That is, when the headlamp 1 irradiates the traveling beam, the first shade 21 is moved by extending both the first plunger 82 of the first solenoid 81 and the second plunger 86 of the second solenoid 85. The first shade is positioned at the second position, and the second shade 41 is positioned at the second shade second position. Thereby, the light distribution pattern becomes the traveling light distribution pattern 120 as described above. In such a traveling light distribution pattern 120, the traveling beam can be irradiated far away because the traveling light distribution pattern 120 is irradiated above the HH line. Thereby, it becomes easy to visually recognize a distant place.

  The headlamp 1 described above includes the first shade 21 that forms the passing light distribution pattern 100 and the second shade 41 that forms the high-speed light distribution pattern 110. The first shade 21 and the second shade 41 have two solenoids 80 having two plungers that operate with the same stroke, that is, a first solenoid 81 having a first plunger 82 and a second solenoid 86 having a second plunger 86. 2 The solenoid 85 is operated, and the light distribution pattern is changed by the first shade 21, the second shade 41, and the solenoid 80. That is, when both of the two plungers are shrunk, the irradiation light is changed to the passing light distribution pattern 100 by the first shade 21. Further, when the first plunger 82 is extended, the irradiation light is changed to the high-speed running light distribution pattern 110 by the second shade 41. Further, when the second plunger 86 is extended, the irradiation light is changed to the traveling light distribution pattern 120 without shielding the irradiation light by the first shade 21 and the second shade 41. Thereby, it can irradiate with 3 types of light distribution patterns, and since a 2 position stop solenoid can be used, manufacturing cost can be held down. As a result, three types of light distribution patterns can be obtained at a low manufacturing cost.

  Further, the first shade 21 and the second shade 41 are switched to the first shade first position and the first shade second position, or the second shade first position and the second shade second position by rotating. Since each of the shades can be rotated independently of each other, their movements are not affected by each other. Thereby, the optical positional accuracy of a shade can be improved and it can irradiate with a more precise light distribution pattern. As a result, it is possible to improve the visibility when irradiated, and to suppress glare to the outside such as an oncoming vehicle, so it is possible to improve safety when traveling by irradiating the outside.

  Further, the first shade 21 and the second shade 41 are given an urging force in the axial direction of the rotary shaft 90 by the shade spring 60, and further, the first shade restriction portion 75 or the second shade restriction portion 76. Therefore, the first shade 21 and the second shade 41 are restricted from moving in the same direction. For this reason, in any case such as when the first shade 21 and the second shade 41 are stopped or rotated, the first shade 21 and the second shade 41 are in the axial direction of the rotary shaft 90, that is, in the left-right direction. The movement in the direction is restricted, and the play in this direction is suppressed. Thereby, the movement and blurring of the light distribution pattern formed by these shades in the left-right direction are also suppressed, and irradiation can be performed with a more accurate and accurate light distribution pattern. As a result, it is possible to improve the visibility when irradiated, and to suppress glare to the outside such as an oncoming vehicle, so it is possible to improve safety when traveling by irradiating the outside.

  Further, as described above, the urging force in the left-right direction applied to the first shade 21 and the second shade 41 is caused by the shade spring 60 that applies the urging force to the first shade 21 and the second shade 41 in the rotation direction. Giving. For this reason, even when a lateral biasing force is applied to the first shade 21 and the second shade 41 and the movement of the biasing force in the first shade restricting portion 75 or the second shade restricting portion 76 is restricted, There is no need to provide an independent urging means for applying an urging force in the left-right direction. As a result, it is possible to irradiate with a highly accurate light distribution pattern at a low manufacturing cost.

  In addition, since the first shade 21 and the second shade 41 are formed to be independently rotatable, the first solenoid 81 and the second solenoid 85 that are rotated by applying an urging force to the first shade 21 and the second shade 41 are respectively It is only necessary to have an output capable of rotating either the first shade 21 or the second shade 41. For this reason, since these solenoids 80 may have a small output, the size and weight of the solenoid 80 can be reduced. As a result, the headlamp 1 can be reduced in size and weight. Moreover, since the solenoid 80 can be reduced in size or weight, manufacturing cost can be suppressed. As a result, the manufacturing cost can be further reduced. Further, when the weights of the first shade 21 and the second shade 41 are approximately the same, the first solenoid 81 and the second solenoid 85 can be the same, and the peripheral components also use common components. be able to. As a result, the manufacturing cost can be more reliably reduced.

  In addition, since the first shade 21 and the second shade 41 are formed so as to be independently rotatable in this way, even when an additional object is provided on the first shade 21 or the second shade 41, It is only necessary to increase the output of only the solenoid 80 that rotates the shade on the side on which the appendage is provided. For example, even if the first shade 21 or the second shade 41 is provided with a sub-reflector (not shown) that reflects light from the light source to a position where it is irradiated far away, the shade on the side where the sub-reflector is provided is rotated. The output of the solenoid 80 to be moved may be increased by an amount corresponding to the increased load during rotation by providing the sub reflector. Thus, the solenoid 80 that rotates the other shade is not changed, and only the solenoid 80 that rotates the shade on the side where the additional material is provided needs to be changed. As a result, when an appendage is provided on the first shade 21 or the second shade 41, an increase in weight and an increase in size due to an increase in the output of the solenoid 80, and an increase in manufacturing cost can be minimized.

  In addition, since it is possible to irradiate with three kinds of light distribution patterns using the two-position stop solenoid 80, it is possible to improve accuracy when irradiating with three light distribution patterns. That is, when irradiating with three or more light distribution patterns, if a solenoid 80 having three or more stop positions, such as a three-position stop solenoid 80, is used, there is a risk that accuracy when stopping in the middle is reduced. is there. Therefore, by providing a plurality of two-position stop solenoids 80 and irradiating with three types of light distribution patterns, the accuracy of all the light distribution patterns is improved. As a result, it is possible to improve the accuracy of the light distribution pattern when irradiating with three types of light distribution patterns.

  Further, since the first shade 21 is formed by the front first shade 22 and the rear first shade 23 and the second shade 41 is provided between them, the light distribution pattern for passing by one headlamp 1 is provided. Even when irradiating with 100 and the light distribution pattern 110 for high speed travel, coloring of irradiation light can be suppressed. As a result, it is possible to achieve both good visibility and irradiation with a plurality of light distribution patterns without deteriorating the visibility when the headlamp 1 irradiates the outside.

  In the embodiment, the first plunger 82 provided in the first solenoid 81 and the second plunger 86 provided in the second solenoid 85 have the same stroke amount, but the first plunger 82 and the second plunger 86 have the same stroke amount. The stroke amount of the plunger 86 may be different. When both plungers are contracted, a passing beam can be irradiated, and when the first plunger 82 is extended, the first shade 21 is rotated to irradiate a high-speed traveling beam. The first plunger and the second plunger If both the first shade 21 and the second shade 41 are rotated to irradiate the traveling beam, the stroke amount between the first plunger 82 and the second plunger 86 is as follows. They can be the same or different.

  Moreover, although the 1st shade 21 is formed with the front 1st shade 22 and the back 1st shade 23, you may form the 1st shade 21 by 1 sheet. Even when the first shade 21 is formed by one sheet, the first shade 21 is provided with the first shade pressing portion 27, and the second shade 41 is provided with the second shade pressing portion 44. Three types of light distribution patterns can be obtained.

  Further, the solenoid 80 is not divided into the first solenoid 81 and the second solenoid 85, and a solenoid 80 having two plungers by one solenoid 80 may be used. If two plungers that can be operated independently are formed, the first shade 21 can be rotated by one of the two plungers, and the second shade 41 can be rotated by the other plunger. Therefore, three types of light distribution patterns can be obtained.

  Further, as the driving means, a device other than the solenoid 80 may be used. For example, the first shade 21 and the second shade 41 may be rotated using a stepping motor. If the first shade 21 and the second shade 41 can be independently rotated when rotating, three types of light distribution patterns can be obtained. As long as the second shade 41 can be rotated independently, the type of the driving means is not limited.

  The shade spring 60 applies an outward biasing force in the left-right direction to the first shade 21 and the second shade 41, but the shade spring 60 is provided with the first shade 21 and the second shade 41. However, it may be formed so as to give an inward biasing force in the left-right direction. Even when an urging force is applied to the first shade 21 and the second shade 41 in this direction, the first shade 21 and the second shade 41 are restrained from playing back and forth in the left-right direction. Can be irradiated.

  In addition, the headlamp 1 of the embodiment uses the discharge bulb 13 as a light source, but the light source may be other than the discharge bulb 13 such as a halogen bulb or an incandescent bulb. Even when a light source other than the discharge bulb 13 is used, the degree of light shielding from the light source is changed by the first shade 21 and the second shade 41 by positioning the light emitting portion of the light source in the vicinity of the first focal point F1. And the above effects can be obtained.

  Further, in the above description, the headlamp 1 mounted on a vehicle traveling on a left-handed road is described. However, the headlamp 1 of the present invention is applied to a vehicle mounted on a vehicle traveling on a right-handed road. When equipped, the shape of the edge of each shade may be reversed. Thereby, since the shape of the cut-off line of the light distribution pattern is reversed left and right, the light distribution pattern is suitable for right-side traveling, and the above effect can be obtained even when traveling on a right-side traveling road.

  As described above, the headlamp according to the present invention is useful for a projector-type headlamp having a shade, and is particularly suitable for a case where a plurality of light distribution patterns are switched for irradiation.

It is sectional drawing of the headlamp which concerns on the Example of this invention. It is AA sectional drawing of FIG. It is a BB arrow line view of FIG. It is a perspective view of a 1st shade, a 2nd shade, and a solenoid. It is attachment detail drawing of the spring for shades. FIG. 3 is a detailed view of part C in FIG. 2. It is DD sectional drawing of FIG. 2, and is a figure which shows the state at the time of irradiation of the beam for passing. It is a figure which shows the light distribution pattern of the beam for passing. It is DD sectional drawing of FIG. 2, and is a figure which shows the state at the time of irradiation of the beam for high-speed driving | running | working. FIG. 3 is a detailed view of a part C in FIG. 2, illustrating a state at the time of irradiation with a high-speed traveling beam. It is a figure which shows the light distribution pattern of the beam for high-speed driving | running | working. It is DD sectional drawing of FIG. 2, and is a figure which shows the state at the time of irradiation of the beam for driving | running | working. It is a figure which shows the light distribution pattern of the beam for driving | running | working.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Headlamp 5 Centerline 10 Reflector 11 Reflecting surface 12 Insertion hole 13 Discharge bulb 14 Light emission part 15 Condensing lens 16 Frame 21 1st shade 22 Front part 1st shade 23 Rear part 1st shade 24 1st shade bearing part 25 Notch part 27 First shade pressing portion 28 Energizing surface 31 Passing edge 32 Driving lane side passing edge 33 Opposing lane side passing edge 34 Passing edge inclined portion 41 Second shade 42 Second shade bearing portion 44 Second shade pressing portion 45 Energizing surface 51 Edge for high-speed traveling 52 Edge for high-speed traveling on the lane side 53 Edge for high-speed traveling on the opposite lane side 54 Edge inclined portion for high-speed traveling 60 Spring for shade 63 Fixed portion 64 Coil portion 65 Rotating direction biasing portion 66 Axial urging portion 70 Shade frame 71 Side wall portion 73 Spring fixed Part 74 Shade restriction part 75 First shade restriction part 76 Second shade restriction part 80 Solenoid 81 First solenoid 82 First plunger 85 Second solenoid 86 Second plunger 90 Rotating shaft 100 Light distribution pattern for passing 101 Cut-off line 102 Opposing lane Side horizontal cut-off line 103 Travel lane side horizontal cut-off line 104 Tilt cut-off line 110 High-speed light distribution pattern 111 Cut-off line 112 Opposite lane side horizontal cut-off line 113 Travel lane-side horizontal cut-off line 114 Tilt cut-off line 120 Travel light distribution pattern F1 1st focus F2 2nd focus

Claims (3)

A projector having a light source, a reflector having a reflection surface based on an ellipse, and a plurality of shades that form different light distribution patterns by shielding a part of light from the light source reflected by the reflection surface In the type of headlamp,
The plurality of shades are composed of a first shade and a second shade that are centered on the same rotation axis provided in a direction extending in the left-right direction and are formed to be independently rotatable ,
The first shade is provided with a first shade pressing portion, and the first shade is provided so as to be rotatable about the rotation shaft by applying a biasing force to the first shade pressing portion. The first operating portion of the first driving means having a first operating portion that can be expanded and contracted is rotated according to the urging force applied to the first shade pressing portion, and the first shade first position is obtained. It is formed to be switchable to the first shade second position ,
The second shade is provided with a second shade pressing portion, and the second shade is provided so as to be rotatable about the rotation shaft by applying a biasing force to the second shade pressing portion. The second operating portion of the second driving means having the second operating portion that can be expanded and contracted is rotated according to the urging force applied to the second shade pressing portion, and the second shade first position is obtained. It is formed to be switchable to the second shade second position ,
The first driving means and the second driving means are provided so as to be independently operable,
The light distribution pattern is a passing light distribution pattern when the first shade is located at the first shade first position and the second shade is located at the second shade first position,
When the first shade is located at the first shade second position and the second shade is located at the second shade first position, a light distribution pattern for high speed running is obtained.
A headlamp characterized in that when the first shade is located at the first shade second position and the second shade is located at the second shade second position, a travel light distribution pattern is obtained. The first shade is switched to the first shade first position when the first operating portion of the first driving means does not apply a biasing force to the first shade pressing portion, and the first operating portion is It is formed so as to be switchable to the first shade second position by applying a biasing force to the first shade pressing portion,
The second shade is switched to the second shade first position when the second operating portion of the second driving means does not apply a biasing force to the second shade pressing portion, and the second operating portion is 2. The headlamp according to claim 1, wherein the headlamp is configured to be switchable to the second shade second position by applying a biasing force to the second shade pressing portion. Furthermore, an urging force in a direction opposite to the rotation direction by the urging force of the first operating portion is applied to the first shade , and a rotation direction by the urging force of the second operating portion is applied to the second shade . A shade spring that applies a biasing force in the opposite direction and applies a biasing force in the axial direction of the rotation shaft to the first shade and the second shade;
A first shade restricting portion for restricting movement of the first shade in a direction in which an urging force is applied in an axial direction of the rotation shaft by the shade spring ;
A second shade restricting portion for restricting movement of the second shade in a direction in which an urging force is applied in an axial direction of the rotation shaft by the shade spring ;
The headlamp according to claim 1, further comprising:

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