JP6209857B2 - Vehicle headlamp - Google Patents

Description

  The present invention is a lens direct-illumination type in which light from a semiconductor-type light source is incident on a lens and can be irradiated from the lens to the front of a vehicle as two light distribution patterns, for example, a low-beam light distribution pattern and a high-beam light distribution pattern. This relates to a vehicle headlamp.

  This type of vehicle headlamp has been conventionally used (for example, Patent Document 1). Hereinafter, a conventional vehicle headlamp will be described.

  A conventional vehicle headlamp includes a light source, a lens, a first reflecting surface, and a second reflecting surface. In the conventional vehicle headlamp, when the first reflecting surface is located at the open position, the light from the light source passes through the lens and is irradiated to the front of the vehicle as a passing beam light distribution pattern. Further, when the first reflecting surface is located at the light shielding position, the light from the light source is reflected by the first reflecting surface, and the reflected light is reflected by the second reflecting surface, and the light distribution pattern for the traveling beam is forward of the vehicle. Irradiated.

JP 2011-113732 A

  In such vehicular headlamps, when light above the traveling beam light distribution pattern is insufficient, the visibility of traffic signs (overhead signs), standing trees, people, and the like tends to decrease. In addition, if there is insufficient light in the lower part of the light distribution pattern for the traveling beam, a part of the light distribution will be lost, resulting in cracks in the light distribution and discontinuities in the light distribution. Tend to decrease.

  However, the conventional vehicle headlamp is not provided with a means for allowing sufficient light to reach the upper and lower portions of the traveling beam light distribution pattern. For this reason, the conventional vehicle headlamp may not provide a good traveling beam light distribution pattern.

  The problem to be solved by the present invention is that a conventional light distribution pattern for a traveling beam may not be obtained with a conventional vehicle headlamp.

  The present invention (invention according to claim 1) includes a semiconductor-type light source, a lens that irradiates light from the semiconductor-type light source as a first light distribution pattern and a second light distribution pattern respectively in front of the vehicle, a light control member, And a driving member that positions the light control member to be movable between the first position and the second position, and the lens is a first position where the light control member is located between the semiconductor-type light source and the auxiliary lens unit. When positioned at the position, the first light distribution pattern is irradiated in front of the vehicle, and when the light control member is positioned at the second position, which is a position between the semiconductor light source and the main lens portion, the second light distribution pattern. , And the focal point of the upper part of the light control member is displaced upward or downward relative to the focal point of the other part, and the focal point of the lower part of the light control member is Displacement below or above the focal point of other parts And which is characterized in that.

  This invention (the invention according to claim 2) is characterized in that the focal points of the upper and lower intermediate portions of the light control member are not displaced in the upper and lower sides.

  According to the present invention (the invention according to claim 3), the focal point of the portion of the light control member that is on the optical axis side when located at the first position is lower than the focal point of the other portion. The focal point of the portion that is displaced and is opposite to the optical axis side of the main lens portion when positioned at the first position in the light control member is displaced upward with respect to the focal point of the other portion. It is characterized by that.

  In this invention (the invention according to claim 4), the light control member is rotated between the first position and the second position by the driving member, and the rotation center of the light control member is more than the light emitting surface of the semiconductor light source. It is located on the rear side.

  This invention (invention according to claim 5) is characterized in that the auxiliary lens portion is disposed below the main lens portion.

  The present invention (the invention according to claim 6) is characterized in that the light control member and the auxiliary lens portion located at the first position partially overlap each other in the vertical direction.

  In the vehicle headlamp of the present invention, when the light control member is located at the second position, most of the light from the semiconductor-type light source is incident on the main lens portion of the lens via the light control member, and the semiconductor-type A part of the light from the light source is directly incident on the auxiliary lens portion of the lens, and a second light distribution pattern, for example, a high beam light distribution pattern is irradiated to the front of the vehicle from the lens. At this time, the focal point of the upper part of the light control member is displaced upward or downward relative to the focal point of the other part. For this reason, the outgoing light emitted from the upper part of the light control member becomes upward outgoing light or downward outgoing light. On the other hand, the focal point of the lower part of the light control member is displaced downward or upward with respect to the focal point of the other part. For this reason, the outgoing light emitted from the lower part of the light control member becomes downward outgoing light or upward outgoing light. Thus, the upward outgoing light emitted from the light control member is transmitted upward through the main lens portion of the lens and deflected upward, while the downward outgoing light emitted from the light control member is transmitted through the main lens portion of the lens. And deflected downward. As a result, the light in the upper part of the second light distribution pattern, for example, the high beam light distribution pattern is sufficient, and the visibility of traffic signs (overhead signs), trees, people, and the like can be improved. In addition, light in the lower part of the second light distribution pattern, for example, the high-beam light distribution pattern is sufficient, preventing part of the light distribution from being lost, and breaking the light distribution to improve the light distribution continuity. The lateral visibility from the front side of the vehicle can be improved. Thus, a good second light distribution pattern, for example, a high beam light distribution pattern is obtained.

1 is an exploded perspective view of main components of a lamp unit showing Embodiment 1 of a vehicle headlamp according to the present invention. FIG. 2 is a perspective view showing the lamp unit. FIG. 3 is a front view showing the lamp unit. FIG. 4 is an explanatory diagram (an explanatory diagram corresponding to the cross-sectional view taken along the line IV-IV in FIG. 3) illustrating the optical path when the light control member is located at the first position. FIG. 5 is an explanatory diagram showing an optical path when the light control member is located at the second position (an explanatory diagram corresponding to the sectional view taken along the line IV-IV in FIG. 3). FIG. 6 is an explanatory diagram of an isoillumination curve showing a low beam light distribution pattern and a high beam light distribution pattern. FIG. 7 is a rear view showing the variable focus lens portion of the light control member. FIG. 8 is an explanatory diagram showing the position of the focal point of the variable focus lens portion of the light control member. FIG. 9 is an explanatory diagram showing a light distribution pattern irradiated from an upper portion, an intermediate portion, and a lower portion of the variable focus lens portion of the light control member when the high beam light distribution pattern is irradiated. FIG. 10 is an explanatory diagram showing a light distribution pattern irradiated from the variable focus lens portion of the light control member when the high beam light distribution pattern is irradiated. FIG. 11 is an explanatory diagram of an isoluminous curve showing a high beam light distribution pattern. FIG. 12 is an explanatory diagram (an explanatory diagram corresponding to the sectional view taken along the line IV-IV in FIG. 3) showing the radiant heat and thermal convection of the semiconductor light source. FIG. 13 is an explanatory diagram showing the center of rotation between the first position and the second position of the light control member (an explanatory diagram corresponding to the sectional view taken along the line IV-IV in FIG. 3). FIG. 14 is an explanatory diagram (an explanatory diagram corresponding to a cross-sectional view taken along the line IV-IV in FIG. 3) showing a second embodiment of the vehicle headlamp according to the present invention.

  Hereinafter, two examples of embodiments (examples) of a vehicle headlamp according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. FIG. 6 is an explanatory diagram of an isoilluminance curve that shows a simplified light distribution pattern on a road surface drawn by computer simulation. In the explanatory diagram of the isoilluminance curve, the central isoilluminance curve indicates high illuminance, and the outer isoilluminance curve indicates low illuminance. The unit of the number is “m”. Further, in FIGS. 9, 10, and 11, reference sign “VU-VD” indicates vertical lines on the upper and lower sides of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen. Furthermore, FIG. 9, FIG. 10, and FIG. 11 are explanatory diagrams of isoluminous curves that show a simplified light distribution pattern on the screen drawn by computer simulation. In the explanatory diagram of the isoluminous curve, the central isoluminous curve indicates high luminous intensity, and the outer isoluminous curve indicates low luminous intensity. Furthermore, in FIGS. 4, 5, 12, 13, and 14, the cross sections of the lens and the light control member are not hatched. In this specification, front, rear, upper, lower, left, and right are front, rear, upper, lower, left, and right when the vehicle headlamp according to the present invention is mounted on a vehicle.

(Description of Configuration of Embodiment 1)
1 to 13 show Embodiment 1 of a vehicle headlamp according to the present invention. Hereinafter, the configuration of the vehicle headlamp according to the first embodiment will be described. In FIG. 1, reference numeral 1 denotes a vehicle headlamp (for example, a headlamp) according to the first embodiment. The vehicle headlamp 1 is mounted on both left and right ends of the front portion of the vehicle C.

(Explanation of lamp unit)
As shown in FIGS. 1 to 3, the vehicle headlamp 1 includes a lamp housing (not shown), a lamp lens (not shown), a semiconductor light source 2, and a lens (fixed lens) 3. , A light control member (movable lens) 4, a drive member 5, a lens cover member 6, a bearing member 7, a base member 8, and a cooling member 9.

  The semiconductor-type light source 2, the lens 3, the light control member 4, the drive member 5, the lens cover member 6, the bearing member 7, the base member 8, and the cooling member 9 constitute a lamp unit. The lamp housing and the lamp lens define a lamp chamber (not shown). The lamp units 2, 3, 4, 5, 6, 7, 8, and 9 are disposed in the lamp chamber, and have an optical axis adjustment mechanism for vertical direction (not shown) and an optical axis adjustment for horizontal direction. It is attached to the lamp housing via a mechanism (not shown).

(Description of the semiconductor-type light source 2)
As shown in FIGS. 1, 4, 5, 12, and 13, the semiconductor-type light source 2 is a self-luminous semiconductor-type light source such as an LED, an OEL, or an OLED (organic EL) in this example. . The semiconductor light source 2 includes a light emitting chip (LED chip) 20, a package (LED package) in which the light emitting chip 20 is sealed with a sealing resin member, a substrate 21 on which the package is mounted, and an attachment to the substrate 21. And a connector 22 for supplying a current from a power source (battery) to the light emitting chip 20. 4, 5, 12, and 13, the connector 22 is not shown.

  The substrate 21 is positioned on the light source mounting portion 80 of the base member 8 by positioning holes and positioning pins, and is mounted on the light source mounting portion 80 of the base member 8 by screws or the like. As a result, the semiconductor light source 2 is attached to the base member 8.

  In this example, the light emitting chip 20 has a planar rectangular shape (planar rectangular shape). That is, four square chips are arranged in the X-axis direction (horizontal direction). Two, three, or five or more square chips, one rectangular chip, or one square chip may be used. Front of the light emitting chip 20 In this example, the rectangular front forms the light emitting surface 23. The light emitting surface 23 faces the front side of the reference optical axis (reference axis) Z of the lens 3. The center O of the light emitting surface 23 of the light emitting chip 20 is located at or near the reference focal point F of the lens 3 and on or near the reference optical axis Z of the lens 3.

  In the figure, X, Y, and Z constitute an orthogonal coordinate (XYZ orthogonal coordinate system). The X axis is a horizontal axis in the left-right direction that passes through the center O of the light emitting surface 23 of the light emitting chip 20. In the first embodiment, the right side is the + direction and the left side is the-direction. The Y axis is a vertical axis in the vertical direction passing through the center O of the light emitting surface 23 of the light emitting chip 20, and in the first embodiment, the upper side is the + direction and the lower side is the-direction. Further, the Z axis is a normal line (perpendicular) passing through the center O of the light emitting surface 23 of the light emitting chip 20, that is, an axis in the front-rear direction orthogonal to the X axis and the Y axis. , The front side is the + direction and the rear side is the − direction.

(Description of lens 3)
The lens 3 is composed of a light transmissive member. As shown in FIGS. 1 to 5, 12, and 13, the lens 3 includes a main lens portion 30, an auxiliary lens portion (additional lens portion) 31, and a mounting portion 32. 12 indicates a boundary line between the main lens unit 30 and the auxiliary lens unit 31. The attachment portion 32 is integrally provided at both left and right end portions of the main lens portion 30. The mounting portion 32 is positioned on the lens mounting portion 81 of the base member 8 by a positioning hole and a positioning pin through the lens cover member 6, and the lens mounting portion 81 of the base member 8 by a screw or the like. Is attached. As a result, the lens 3 is attached to the base member 8 via the lens cover member 6. In this example, the attachment portion 32 has an integral structure with the lens 3, but may have a separate structure from the lens 3.

  The lens 3 converts the light from the semiconductor-type light source 2 into a low beam light distribution pattern (passing light distribution pattern) LP as a first light distribution pattern shown in FIG. 6A, and FIG. 6B. The high beam light distribution pattern (traveling light distribution pattern) HP as the second light distribution pattern shown in FIG. The low-beam light distribution pattern LP has a lower horizontal cutoff line, an oblique cutoff line, and an upper horizontal cutoff line. The high beam light distribution pattern HP has a hot zone (high luminous intensity band) at the center.

(Description of the main lens unit 30)
The main lens unit 30 has the reference optical axis Z and the reference focal point F as shown in FIGS. The main lens unit 30 uses the central light L1 and a part of the ambient light among the light emitted from the semiconductor light source 2. The central light L1 is light having a predetermined angle (about 40 ° in this example) from the X-axis or Y-axis of the hemispherical emission range of the semiconductor-type light source 2, and is the center of the main lens unit 30. It is light incident on the part. The ambient light is light within a predetermined angle (about 40 ° in this example) from the X axis or Y axis of the hemispherical emission range of the semiconductor light source 2. A part of the ambient light is light that is incident on a peripheral part of the main lens unit 30 in the peripheral light. In this example, the main lens unit 30 is a transmissive lens unit that transmits light from the semiconductor light source 2.

  The main lens unit 30 uses the light from the semiconductor-type light source 2 (the central light L1 and a part of the ambient light) as a main light distribution pattern (basic light distribution pattern). The light is emitted forward of the vehicle C as the main light distribution pattern of the light pattern LP and the main light distribution pattern of the high beam light distribution pattern HP. That is, the main lens unit 30 uses the light directly incident from the semiconductor light source 2 (the central light L1 and part of the ambient light) as the main light distribution pattern of the low beam light distribution pattern LP. Light that irradiates forward and passes through the light control member 4 from the semiconductor-type light source 2 (the central light L1) and directly incident light from the semiconductor-type light source 2 (part of the ambient light) Irradiate the front of the vehicle C as the main light distribution pattern of the high beam light distribution pattern HP.

  The main lens unit 30 includes an incident surface 300 on which light from the semiconductor-type light source 2 enters the main lens unit 30 and an output surface 301 on which light incident on the main lens unit 30 exits. Has been. The entrance surface 300 of the main lens unit 30 is composed of a free-form surface or a composite quadric surface. The exit surface 301 of the main lens portion 30 has a convex shape protruding to the opposite side of the semiconductor light source 2, and is composed of a free curved surface or a compound quadratic curved surface.

(Description of the auxiliary lens unit 31)
As shown in FIGS. 4 and 5, the auxiliary lens portion 31 is provided around the main lens portion 30 on the lower side (lower side) in the first embodiment. As a result, as shown in FIG. 12, an opening (upper opening WU) is formed between the semiconductor-type light source 2 and the upper portion of the lens 3.

  The auxiliary lens unit 31 effectively uses another part L2 of ambient light among the light emitted from the semiconductor-type light source 2. The other part L2 of the ambient light is light that is incident on the auxiliary lens unit 31 among the ambient light. In this example, the auxiliary lens portion 31 is a total reflection type lens portion that totally reflects the other part L2 of the ambient light. The auxiliary lens unit 31 is integral with the main lens unit 30.

  The auxiliary lens unit 31 uses the other part L2 of the ambient light as an auxiliary light distribution pattern, and in the first embodiment, the auxiliary light distribution pattern of the low beam light distribution pattern LP and the high beam light distribution pattern HP. Irradiate ahead of the vehicle C as an auxiliary light distribution pattern. That is, the auxiliary lens unit 31 uses the light transmitted through the light control member 4 from the semiconductor light source 2 (the other part L2 of the ambient light) as an auxiliary light distribution pattern of the low beam light distribution pattern LP. Light directly incident from C and directly incident from the semiconductor light source 2 (the other part L2 of the ambient light) is used as an auxiliary light distribution pattern of the high beam light distribution pattern HP in front of the vehicle C. Irradiate.

  The auxiliary lens unit 31 includes an incident surface 310 on which another part L2 of the ambient light is incident on the auxiliary lens unit 31, and a reflection on which light incident on the auxiliary lens unit 31 from the incident surface 310 is reflected. A surface 311 and an exit surface 312 from which reflected light reflected by the reflecting surface 311 exits from the auxiliary lens portion 31 to the outside are configured. The entrance surface 310, the reflection surface 311 and the exit surface 312 are each composed of a free-form surface or a composite quadric surface.

(Description of light control member 4)
The light control member 4 includes a varifocal lens portion 40 at a central portion and mounting portions 41 at both left and right portions. The varifocal lens portion 40 and the attachment portion 41 are made of a light transmitting member and have an integral structure. The attachment portion 41 is positioned and attached to the base member 8 via the bearing member 7. As a result, the light control member 4 is attached to the base member 8 via the bearing member 7 so as to be rotatable between a first position and a second position. The rotation center O <b> 1 of the light control member 4 is located behind and below the center O of the light emitting surface 23.

  The light control member 4 is configured to be switchable (rotated) between the first position and the second position by the drive member 5. As shown in FIG. 4, the first position is a position where the variable focus lens unit 40 is located between the light emitting surface 23 of the semiconductor light source 2 and the incident surface 310 of the auxiliary lens unit 31. is there. As shown in FIG. 5, the varifocal lens unit 40 is incident on the light emitting surface 23 of the semiconductor light source 2 and the central light L <b> 1 on the incident surface 300 of the main lens unit 30. It is a position located between the central part.

  As shown in FIGS. 4, 12, and 13, the varifocal lens portion 40 of the light control member 4 located at the first position and the auxiliary lens portion 31 of the lens 3 are partially (mostly) ) Overlap vertically. As a result, as shown in FIG. 12, a slight opening (lower opening WD) is formed between the semiconductor-type light source 2 and the lower portion of the lens 3 and the light control member 4.

(Description of the variable focus lens unit 40)
When the varifocal lens unit 40 is located at the first position, as shown in FIG. 4, the other part L <b> 2 of the ambient light is transmitted and incident into the auxiliary lens unit 31. As a result, the auxiliary light distribution pattern of the low beam light distribution pattern LP is irradiated forward of the vehicle C from the emission surface 312 of the auxiliary lens unit 31.

  When the varifocal lens unit 40 is located at the second position, as shown in FIG. 5, the varifocal lens unit 40 transmits the central light L <b> 1 and enters the central part of the main lens unit 30. As a result, a variable light distribution pattern HPM (see FIG. 10A) of a part of the main light distribution pattern of the high beam light distribution pattern HP is transferred from the center of the exit surface 301 of the main lens unit 30 to the vehicle C. Irradiated forward.

  As shown in FIGS. 1, 4, and 5, the variable focus lens unit 40 has an entrance surface 400 having a concave shape and an exit surface 401 having a convex shape. The incident surface 400 has a concave shape in the optical axis (light emission axis) direction of the variable focus lens unit 40. That is, the incident surface 400 has a concave shape on the inner side of the variable focus lens unit 40 with respect to the light emitting surface 23 of the semiconductor-type light source 2. The exit surface 401 has a convex shape in the optical axis (light exit axis) direction of the variable focus lens unit 40. That is, the emission surface 401 has a convex shape on the outer side of the variable focus lens unit 40 with respect to the light emitting surface 23 of the semiconductor-type light source 2.

  The variable focus lens unit 40 changes the focus of the auxiliary lens unit 31. That is, the focal point (pseudo focal point) F1 of the auxiliary lens unit 31 when positioned at the first position is on the upper side and the right side with respect to the focal point F of the auxiliary lens unit 31 when positioned at the second position. It is to be displaced. The displacement on the upper side of the pseudo focal point F1 is shown in FIGS. 4 and 12, but the displacement on the right side is not shown. The pseudo focus F <b> 1 is a pseudo focus of the auxiliary lens unit 31 through the variable focus lens unit 40.

  In the horizontal section, the variable focus lens portion 40 gradually decreases in distance from the incident surface 400 and the exit surface 401 from the right side in this example to the left side in this example. That is, the distance between the entrance surface 400 and the exit surface 401 at the right end of the variable focus lens unit 40 is long, and the entrance surface 400 and the exit surface 401 at the left end of the variable focus lens unit 40 are long. The distance between is short.

  In the variable focus lens unit 40, the distance between the incident surface 400 and the exit surface 401 gradually decreases from the upper side to the lower side in the vertical cross section. That is, the distance between the entrance surface 400 and the exit surface 401 at the upper end of the variable focus lens unit 40 is long, and the entrance surface 400 and the exit surface at the lower end of the variable focus lens unit 40. The distance to 401 is short. In the vertical cross section, the distance between the upper entrance surface 400 and the exit surface 401 and the distance between the lower entrance surface 400 and the exit surface 401 may not change.

  When the light control member 4 is located at the first position shown in FIG. 4, a portion 40 </ b> U located on the main lens portion 30 side of the variable focus lens portion 40 of the light control member 4 is shown in FIG. 7. It is a part above the upper two-dot chain line shown. When the light control member 4 is located at the first position shown in FIG. 4, a portion 40 </ b> D opposite to the portion 40 </ b> U located on the main lens portion 30 side of the variable focus lens portion 40 of the light control member 4. Is a portion below the lower two-dot chain line shown in FIG. The intermediate portion 40C of the varifocal lens portion 40 is a portion between the upper two-dot chain line and the lower two-dot chain line shown in FIG.

  The upper portion 40U of the varifocal lens portion 40 continuously displaces the reference focus F of the main lens portion 30 downward (see F40U in FIG. 8). The intermediate portion 40C of the varifocal lens portion 40 is configured to continuously displace the reference focus F of the main lens portion 30 upward (see F40C in FIG. 8). The lower portion 40D of the varifocal lens portion 40 continuously displaces the reference focal point F of the main lens portion 30 upward (see F40D in FIG. 8) larger than the intermediate portion 40C. Is.

  That is, the focal point F40U of the upper portion 40U of the variable focus lens unit 40 of the light control member 4 is the focal point of the other portion (the focal point F40C of the intermediate portion 40C, the focal point F40D of the lower portion 40D). Is displaced downward. On the contrary, the focus F40D of the lower portion 40D of the variable focus lens portion 40 of the light control member 4 is set to the focus of other portions (the focus F40C of the intermediate portion 40C, the focus F40U of the upper portion 40U). On the other hand, it is displaced upward. The focal point F40C of the intermediate portion 40C of the variable focus lens unit 40 of the light control member 4 is not displaced on both the upper and lower sides.

(Description of drive member 5)
As shown in FIGS. 1 and 2, the drive member 5 positions the light control member 4 so that the movement (rotation and rotation) can be switched between the first position and the second position. The drive member 5 includes a solenoid 50, a connecting pin 51, and a spring 52.

  A mounting portion 53 is provided integrally with the solenoid 50. The mounting portion 53 is positioned on the back side of the base mounting portion 82 of the base member 8 by positioning holes and positioning pins, and is mounted on the back side of the base mounting portion 82 of the base member 8 by screws or the like. It has been. As a result, the solenoid 50 of the drive member 5 is attached to the base member 8. The solenoid 50 has an advance / retreat rod 54.

  One end of the connecting pin 51 is fixed to the tip of the advance / retreat rod 54. The other end of the connecting pin 51 is inserted into a long hole 42 provided in the mounting portion 41 of the light control member 4. As a result, the forward / backward movement of the forward / backward rod 54 of the solenoid 50 is converted into the rotational movement of the light control member 4 via the connecting pin 51 and the long hole 42.

  The spring 52 is attached to the bearing member 7. One end of the spring 52 is in elastic contact with the bearing member 7. The other end of the spring 52 is in elastic contact with the light control member 4. As a result, during normal operation, that is, when the solenoid 50 is not energized, the light control member 4 is positioned at the first position by the force of the spring 52. When the solenoid 50 is energized, the advancing / retracting rod 54 positioned at the forward movement position moves against the force of the spring 52, and the light control member 4 rotates from the first position to the second position. Located in the second position. When the energization of the solenoid 50 is cut off, the advance / retreat rod 54 located at the retracted position moves forward by the force of the spring 52, and the light control member 4 rotates from the second position to the first position. Located in the first position.

(Description of the lens cover member 6)
The lens cover member 6 has a shape that covers the lens 3 as shown in FIGS. The lens cover member 6 is made of a light impermeable member, for example. An opening 60 through which light from the semiconductor-type light source 2 passes through the main lens portion 30 and the auxiliary lens portion 31 of the lens 3 is provided at the center of the lens cover member 6. Attachment portions 61 are integrally provided at both left and right ends of the lens cover member 6. The mounting portion 61 is positioned on the lens mounting portion 81 of the base member 8 together with the mounting portion 32 of the lens 3 by a positioning hole, a positioning pin, and the like, and the lens of the base member 8 by a screw or the like. It is attached to the attachment part 81. As a result, the lens cover member 6 is attached to the base member 8 together with the lens 3.

(Description of bearing member 7)
As shown in FIGS. 1 and 2, the bearing member 7 has a shape that covers the semiconductor light source 2 and the light source mounting portion 80 of the base member 8. The bearing member 7 is made of a light-impermeable member, for example. An opening through which light from the semiconductor-type light source 2 passes through the main lens portion 30 and the auxiliary lens portion 31 of the lens 3 and the variable focus lens portion 40 of the light control member 4 is provided at the center of the bearing member 7. A portion 70 is provided. Mounting portions 71 are integrally provided at the four corners of the bearing member 7. The mounting portion 71 is positioned on the front side of the base mounting portion 82 of the base member 8 by positioning holes and positioning pins, and is positioned on the front side of the base mounting portion 82 of the base member 8 by screws or the like. It is attached. As a result, the bearing member 7 is attached to the base member 8.

  A shaft portion 72 is integrally provided at each of the left and right central portions of the bearing member 7. A rotation hole 43 provided in the attachment portion 41 of the light control member 4 is rotatably supported on the shaft portion 72. As a result, the light control member 4 is attached to the bearing member 7 so as to be rotatable between the first position and the second position.

  The bearing member 7 and the light control member 4 are integrally provided with stoppers 73 and 44, respectively. Thereby, the light control member 4 can be positioned at the first position and the second position.

(Description of base member 8)
As shown in FIGS. 1 to 3, the base member 8 includes the base mounting portion 82, the light source mounting portion 80 at the center of the front side of the base mounting portion 82, and the front side of the base mounting portion 82. And the lens mounting portions 81 at both the left and right end portions. The semiconductor light source 2 is attached to the light source attachment portion 80. The lens 3 is attached to the lens attachment portion 81 via the lens cover member 6. The bearing member 7 on which the light control member 4 is rotatably supported between the first position and the second position is attached to the front side of the base attachment portion 82. The drive member 5 and the cooling member 9 are respectively attached to the back side of the base attachment portion 82.

(Description of cooling member 9)
The cooling member 9 has a cooling fan as shown in FIGS. The cooling member 9 is positioned on the back side of the base mounting portion 82 of the base member 8 and is mounted on the back side of the base mounting portion 82 of the base member 8 with a screw or the like. As a result, the cooling member 9 is attached to the base member 8.

(Description of the operation of the first embodiment)
The vehicle headlamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  During normal operation, that is, when the solenoid 50 is not energized, the advance / retreat rod 54 is located at the advance position and the light control member 4 is located at the first position by the spring force of the spring 52. At this time, as shown in FIG. 4, the variable focus lens unit 40 of the light control member 4 is positioned between the light emitting surface 23 of the semiconductor light source 2 and the incident surface 310 of the auxiliary lens unit 31 of the lens 3. .

  In this normal time, the light emitting chip 20 of the semiconductor light source 2 is turned on. Then, among the light radiated from the light emitting surface 23 of the light emitting chip 20, the central light L1 and the part of the peripheral light of the semiconductor light source 2 are directly from the main lens portion 30 of the lens 3 as shown in FIG. The light enters the main lens unit 30 from the incident surface 300. At this time, the light distribution of the incident light is controlled on the incident surface 300. Incident light that enters the main lens unit 30 exits from the exit surface 301 of the main lens unit 30. At this time, the light distribution of the outgoing light is controlled on the outgoing surface 301. The light emitted from the main lens unit 30 is irradiated in front of the vehicle C as a main light distribution pattern of a low beam light distribution pattern LP having a lower horizontal cut-off line, an oblique cut-off line, and an upper horizontal cut-off line. .

  On the other hand, among the light emitted from the light emitting surface 23 of the light emitting chip 20, the other part L2 of the ambient light of the semiconductor light source 2 is as shown in FIG. 4 of the variable focus lens unit 40 of the light control member 4. The light enters from the incident surface 400 into the variable focus lens unit 40. At this time, the light distribution of the incident light is controlled on the incident surface 400. Incident light that enters the varifocal lens unit 40 exits from the exit surface 401 of the varifocal lens unit 40. At this time, the emitted light is subjected to light distribution control on the emission surface 401.

  Light emitted from the variable focus lens unit 40 enters the auxiliary lens unit 31 from the incident surface 310 of the auxiliary lens unit 31. At this time, the light distribution of the incident light is controlled on the incident surface 310. Incident light that has entered the auxiliary lens unit 31 is totally reflected by the reflecting surface 311 of the auxiliary lens unit 31. At this time, the reflected light is subjected to light distribution control on the reflecting surface 311. The totally reflected light is emitted from the emission surface 312. At this time, the light distribution of the outgoing light is controlled on the outgoing surface 312. The emitted light from the auxiliary lens unit 31 is irradiated in front of the vehicle C as an auxiliary light distribution pattern of the low beam light distribution pattern LP.

  Then, the main light distribution pattern and the auxiliary light distribution pattern are combined (superimposed) to obtain a low beam light distribution pattern LP shown in FIG.

  At this time, the focal point F40U of the upper portion 40U of the varifocal lens unit 40, that is, the focal point F40U of the upper portion 40U on the reference optical axis Z side of the main lens unit 30 in the varifocal lens unit 40 is the intermediate portion 40C. The focal point F40C (and the focal point F40D of the lower portion 40D) is displaced downward.

  For this reason, as shown in FIG. 4, the emitted light L3 emitted from the upper portion 40U of the variable focus lens unit 40 becomes a downward emitted light. For this reason, even if the outgoing light L3 emitted from the upper portion 40U of the variable focus lens part 40 is incident on the main lens part 30 instead of the auxiliary lens part 31, the outgoing light L4 emitted from the main lens part 30 remains. , Turn down. The downward emitted light L4 becomes a part of the low beam light distribution pattern LP.

  Then, the solenoid 50 is energized. Then, the advancing / retreating rod 54 moves backward against the spring force of the spring 52 and is positioned at the retracted position, and the light control member 4 rotates from the first position toward the second position and is positioned at the second position. . That is, the light control member 4 that has been positioned between the semiconductor-type light source 2 and the auxiliary lens unit 31 until now has the light-emitting surface 23 of the semiconductor-type light source 2 and the main lens unit 30 of the lens 3 as shown in FIG. Between the light incident surface 300 and the light incident surface 300.

  Of the light emitted from the light emitting surface 23 of the light emitting chip 20, the central light L <b> 1 of the semiconductor-type light source 2 enters the variable focus lens unit 40 from the incident surface 400 of the variable focus lens unit 40 of the light control member 4. To do. At this time, the light distribution of the incident light is controlled on the incident surface 400. Incident light that enters the varifocal lens unit 40 exits from the exit surface 401 of the varifocal lens unit 40. At this time, the emitted light is subjected to light distribution control on the emission surface 401.

  Light emitted from the variable focus lens unit 40 enters the main lens unit 30 from the incident surface 300 of the main lens unit 30. A part of the ambient light of the semiconductor light source 2 is directly incident on the main lens unit 30 from the incident surface 300 of the main lens unit 30. At this time, the light distribution of the incident light is controlled on the incident surface 300. Incident light that enters the main lens unit 30 exits from the exit surface 301 of the main lens unit 30. At this time, the light distribution of the outgoing light is controlled on the outgoing surface 301. The emitted light from the main lens unit 30 is irradiated in front of the vehicle C as the main light distribution pattern of the high beam light distribution pattern HP.

  On the other hand, among the light emitted from the light emitting surface 23 of the light emitting chip 20, the other part L2 of the ambient light of the semiconductor light source 2 is directly from the incident surface 310 of the auxiliary lens unit 31, as shown in FIG. The light enters the auxiliary lens unit 31. At this time, the light distribution of the incident light is controlled on the incident surface 310. Incident light that has entered the auxiliary lens unit 31 is totally reflected by the reflecting surface 311 of the auxiliary lens unit 31. At this time, the reflected light is subjected to light distribution control on the reflecting surface 311. The totally reflected light is emitted from the emission surface 312. At this time, the light distribution of the outgoing light is controlled on the outgoing surface 312. The light emitted from the auxiliary lens unit 31 is irradiated in front of the vehicle C as an auxiliary light distribution pattern of the high beam light distribution pattern HP.

  Then, the main light distribution pattern and the auxiliary light distribution pattern are combined (superimposed) to obtain a high beam light distribution pattern HP shown in FIG. 6B.

  Here, the focal point F40U of the upper portion 40U of the varifocal lens unit 40 is displaced downward with respect to the focal point F40C of the intermediate portion 40C (and the focal point F40D of the lower portion 40D). For this reason, the outgoing light emitted from the upper portion 40U of the varifocal lens portion 40 becomes downward outgoing light. As a result, downward outgoing light emitted from the upper portion 40U of the variable focus lens portion 40 is transmitted through the main lens portion 30 and deflected downward. As a result, as shown in FIG. 9A, the first variable light distribution pattern HPM1 irradiated from the upper portion 40U and the main lens portion 30 of the varifocal lens portion 40 is diffused downward (lower). Is cheated on the side).

  Conversely, the focus F40D of the lower portion 40D of the variable focus lens unit 40 is displaced upward with respect to the focus F40C of the intermediate portion 40C (and the focus F40U of the upper portion 40U). For this reason, the outgoing light emitted from the lower portion 40D of the variable focus lens section 40 becomes upward outgoing light. As a result, the upward outgoing light emitted from the lower portion 40D of the varifocal lens portion 40 is transmitted through the main lens portion 30 and deflected upward. As a result, as shown in FIG. 9C, the third variable light distribution pattern HPM3 irradiated from the lower portion 40D of the varifocal lens portion 40 and the main lens portion 30 is diffused upward (upper side). Have been deceived by

  The focal point F40C of the intermediate portion 40C of the variable focus lens unit 40 is not displaced. For this reason, the outgoing light emitted from the intermediate portion 40C of the variable focus lens unit 40 becomes outgoing light in the same direction. Thereby, the outgoing light in the same direction emitted from the intermediate portion 40C of the variable focus lens unit 40 is transmitted through the main lens unit 30 in the same direction. As a result, as shown in FIG. 9B, the second variable light distribution pattern HPM2 irradiated from the intermediate portion 40C of the varifocal lens portion 40 and the main lens portion 30 is not diffused vertically (upper and lower sides). Not be deceived by.)

  The first variable light distribution pattern HPM1, the second variable light distribution pattern HPM2, and the third variable light distribution pattern HPM3 are combined (superimposed), and the variable light distribution shown in FIG. A pattern HPM is obtained. Note that the variable light distribution pattern HPMA shown in FIG. 10B is a variable light distribution pattern obtained when using a variable focus lens unit in which the focal point is not displaced and is fixed. As described above, the variable light distribution pattern HPM shown in FIG. 10A is diffused on both the upper and lower sides of the variable light distribution pattern HPMA shown in FIG. . That is, the variable light distribution pattern HPM shown in FIG. 10A has sufficient light distributed on both the upper and lower sides.

  Then, the variable light distribution pattern HPM shown in FIG. 10A and the fixed light distribution pattern (not shown) are combined (superimposed) to obtain the high beam light distribution pattern HP shown in FIG. 11A. The high beam distribution pattern HPA shown in FIG. 11B is a high beam obtained by combining (superimposing) the variable light distribution pattern HPMA shown in FIG. 10B and a fixed light distribution pattern (not shown). This is a light distribution pattern. The fixed light distribution pattern is a light distribution pattern obtained by removing the variable light distribution pattern HPM shown in FIG. 10A from the high beam light distribution pattern HP shown in FIG. In other words, the fixed light distribution pattern is a light distribution pattern other than the variable light distribution pattern HPM irradiated from the variable focus lens unit 40 and the main lens unit 30, and does not pass through the variable focus lens unit 40 and from the main lens unit 30. This is a fixed light distribution pattern formed by combining (superimposing) the fixed light distribution pattern irradiated and the fixed light distribution pattern irradiated from the auxiliary lens unit 31.

  Here, in the variable light distribution pattern HPMA shown in FIG. 10B, sufficient light is not distributed on both the upper and lower sides. For this reason, in the high beam light distribution pattern HPA shown in FIG. 11 (B), the light in the upper part is insufficient (see the arrow in FIG. 11 (B)). For this reason, there are problems in the visibility of traffic signs (overhead signs), trees, people, and the like. On the other hand, light in the lower part is insufficient, and part of the light distribution (see the small circle in FIG. 11B) is lost, and the light distribution is broken between the variable light distribution pattern HPMA and the fixed light distribution pattern. Occurs and there is a problem in visibility from the front side of the vehicle to the side.

  In contrast, the variable light distribution pattern HPM shown in FIG. 10A has sufficient light distributed on both the upper and lower sides. For this reason, in the high-beam light distribution pattern HP shown in FIG. 11A, the light in the upper part is sufficient (see the arrow in FIG. 11A). For this reason, the visibility of traffic signs (overhead signs), standing trees and people is improved. On the other hand, the light in the lower part is also sufficient, so that part of the light distribution (see the small circle in FIG. 11A) is prevented from being lost, and the light distribution is between the variable light distribution pattern HPM and the fixed light distribution pattern. The side visibility from the front side of the vehicle is improved.

  Then, the energization to the solenoid 50 is cut off. Then, the advance / retreat rod 54 moves forward by the spring force of the spring 52 and is located at the advance position, and the light control member 4 rotates from the second position toward the first position and is located at the first position. That is, the light control member 4 that has been positioned between the semiconductor-type light source 2 and the main lens unit 30 is positioned between the semiconductor-type light source 2 and the auxiliary lens unit 31.

(Description of the effect of Embodiment 1)
The vehicular headlamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicular headlamp 1 according to the first embodiment, the focal point F40U of the upper portion 40U of the variable focus lens portion 40 of the light control member 4 is lower than the focal points F40C and F40U of the other portions 40C and 40D. It is displaced. Therefore, as shown in FIG. 5, when the light control member 4 is located at the second position, the emitted light emitted from the upper portion 40U of the variable focus lens portion 40 of the light control member 4 is emitted downward. It becomes a light. On the other hand, the focal point of the lower portion 40D of the variable focus lens unit 40 of the light control member 4 is displaced upward with respect to the focal points F40C and F40U of the other portions 40C and 40U. For this reason, as shown in FIG. 5, when the light control member 4 is located at the second position, the outgoing light emitted from the lower portion 40D of the variable focus lens portion 40 of the light control member 4 is upward. Output light. As a result, upward outgoing light emitted from the variable focus lens portion 40 of the light control member 4 is transmitted upward through the main lens portion 30 of the lens 3 and deflected upward, while the variable focus lens portion 40 of the light control member 4. The downward outgoing light emitted from the light passes through the main lens portion 30 of the lens 3 and is deflected downward. As a result, the light above the high beam light distribution pattern HP is sufficient, and the visibility of traffic signs (overhead signs), trees, people, and the like can be improved. In addition, light below the high beam light distribution pattern HP is sufficient, preventing a part of the light distribution from falling out, eliminating cracks in the light distribution, and improving the continuity of the light distribution. Visibility from the side can be improved. Thus, a good high beam light distribution pattern can be obtained.

  In the vehicle headlamp 1 according to the first embodiment, the focal point F40C of the intermediate portion 40C of the variable focus lens unit 40 is not displaced on both the upper and lower sides. For this reason, the outgoing light emitted from the intermediate portion 40C of the variable focus lens unit 40 becomes outgoing light in the same direction. Thereby, the outgoing light in the same direction emitted from the intermediate portion 40C of the variable focus lens unit 40 is transmitted through the main lens unit 30 in the same direction. As a result, as shown in FIG. 9B, the second variable light distribution pattern HPM2 irradiated from the intermediate portion 40C of the varifocal lens portion 40 and the main lens portion 30 is not diffused vertically (upper and lower sides). Not be deceived by.) As a result, a hot zone (high luminous intensity band) HZ is obtained at the center of the high beam light distribution pattern HP, and distant visibility is ensured.

  In the vehicle headlamp 1 according to the first embodiment, the focal point F40U of the upper portion 40U on the reference optical axis Z side of the main lens portion 30 in the variable focus lens portion 40 of the light control member 4 is the other portion. The lower portion 40D is displaced downward with respect to the focal point F40D. Therefore, as shown in FIG. 4, when the light control member 4 is located at the first position, the emitted light L3 emitted from the upper portion 40U of the varifocal lens portion 40 becomes downward emitted light. For this reason, even if the outgoing light L3 emitted from the upper portion 40U of the variable focus lens part 40 is incident on the main lens part 30 instead of the auxiliary lens part 31, the outgoing light L4 emitted from the main lens part 30 remains. , Turn down. The downward emitted light L4 becomes a part of the low beam light distribution pattern LP. As a result, generation of stray light can be prevented.

  Here, the case where the focal point of the upper portion 40U of the varifocal lens unit 40 is not displaced with respect to the focal point of the lower portion 40D or is displaced upward will be described. In this case, the outgoing light emitted from the upper portion 40U of the varifocal lens unit 40 does not become downward outgoing light. For this reason, when the outgoing light emitted from the upper portion 40U of the varifocal lens portion 40 enters the main lens portion 30, the outgoing light L5 emitted from the main lens portion 30 faces upward (in FIG. 4). (See the dashed arrow). As a result, generation of stray light cannot be prevented. On the other hand, the vehicle headlamp 1 according to the first embodiment can prevent the generation of stray light as described above.

  In the vehicle headlamp 1 according to the first embodiment, when the light control member 4 is located at the first position, a part of the light from the semiconductor light source 2 (the central light L1 and a part of the ambient light) is directly received. The light enters the main lens portion 30 of the lens 3 and the remainder of the light from the semiconductor light source 2 (the other part L2 of the ambient light) enters the auxiliary lens portion 31 of the lens 3 via the light control member 4. The low beam light distribution pattern LP is irradiated to the front of the vehicle C from the lens 3. When the light control member 4 is located at the second position, a part of the light from the semiconductor light source 2 (central light L1) enters the main lens portion 30 of the lens 3 via the light control member 4, and Part of light from the semiconductor-type light source 2 (part of ambient light) directly enters the main lens portion 30 of the lens 3 and the rest of the light from the semiconductor-type light source 2 (other part of ambient light) L <b> 2) directly enters the auxiliary lens portion 31 of the lens 3, and the high beam light distribution pattern HP is irradiated from the lens 3 to the front of the vehicle C. As a result, the low-beam light distribution pattern LP and the high-beam light distribution pattern HP can be reliably obtained in the lens direct-type lamp unit.

  In the vehicle headlamp 1 according to the first embodiment, when the light control member 4 is located at the first position, a part of the light from the semiconductor light source 2 (the central light L1 and a part of the ambient light) is directly received. Since the remaining light (other part L2 of ambient light) from the semiconductor-type light source 2 enters the auxiliary lens unit 31 through the light control member 4, the semiconductor-type light source 2 is incident on the main lens unit 30. Light (central light L1 and part of ambient light, other part L2 of ambient light) can be used effectively. When the light control member 4 is located at the second position, a part of the light from the semiconductor light source 2 (central light L1) enters the main lens portion 30 through the light control member 4, and the semiconductor type A part of the light from the light source 2 (a part of the ambient light) directly enters the main lens unit 30, and the remaining light from the semiconductor light source 2 (the other part L2 of the ambient light) is directly the auxiliary lens. Since the light is incident on the part 31, the light from the semiconductor-type light source 2 (the central light L1, a part of the ambient light, and the other part L2 of the ambient light) can be used effectively.

  In the vehicle headlamp 1 according to the first embodiment, a single light control member 4 is moved and switched between a first position and a second position by a drive member 5. For this reason, the positional accuracy of the first position and the second position of the light control member 4 can be improved. In addition, since the drive member 5 may be an inexpensive low-output one, for example, a low-output solenoid 50 and a small spring-loaded spring 52, the manufacturing cost can be reduced.

  In the vehicle headlamp 1 according to the first embodiment, the light control member 4 is rotated between the first position and the second position by the drive member 5, and the rotation center O1 of the light control member 4 is a semiconductor type. It is located behind the light emitting surface 23 of the light source 2. Therefore, as shown in FIG. 13, the rotation angle θ1 of the light control member 4 is made smaller than the rotation angle θ2 when the center O of the light emitting surface 23 is the rotation center of the light control member 4. Can do. Thereby, since the drive member 5 can be reduced in size and output, the unit can be reduced in size and cost.

  In the vehicular headlamp 1 according to the first embodiment, the auxiliary lens unit 31 is disposed below the main lens unit 30. For this reason, when the light control member 4 is positioned at the first position when the drive member 5 is not driven, the light control member 4 can be stopped in the lower side, that is, in the direction of gravity. As a result, the drive member 5 can be an inexpensive low-output one, for example, a low-output solenoid 50 and a spring 52 with a small spring load, so that the manufacturing cost can be reduced.

  In the vehicular headlamp 1 according to the first embodiment, the light control member 4 and the auxiliary lens unit 31 located at the first position partially overlap each other. For this reason, as shown in FIG. 12, when the light control member 4 and the auxiliary lens unit 31 are positioned on the lower side, a large upper opening WU is obtained at the upper part, and a slight lower opening WD is provided at the lower part. It is formed. As a result, as shown by a solid arrow A in FIG. 12, thermal convection from the lower opening WD to the upper opening WU occurs. As a result, the heat generated in the semiconductor light source 2 (LED radiant heat) can be released to the outside from the upper opening WU along the heat convection as shown by the solid arrow B in FIG. Can be improved.

(Description of the configuration and effect of the second embodiment)
FIG. 14 shows Embodiment 2 of the vehicle headlamp according to the present invention. Hereinafter, the vehicle headlamp according to the second embodiment will be described. In the figure, the same reference numerals as those in FIGS. 1 to 13 denote the same components.

  The vehicle headlamp 1 according to the first embodiment has the auxiliary lens portion 31 positioned on the lower side with respect to the main lens portion 30 and the first position of the light control member 4 on the lower side. The focal point F40U of the upper portion 40U of the variable focus lens portion 40 of the light control member 4 is displaced downward, and the focal point F40D of the lower portion 40D of the variable focus lens portion 40 of the light control member 4 is shifted upward. Is to be displaced. In contrast, in the vehicle headlamp according to the second embodiment, the auxiliary lens unit 31 is positioned above the main lens unit 30, and the first position of the light control member 4 is positioned above. The focus F40U of the upper portion 40U of the variable focus lens portion 40 of the light control member 4 is displaced upward, and the focus F40D of the lower portion 40D of the variable focus lens portion 40 of the light control member 4 is changed. It is to be displaced downward.

  Since the vehicular headlamp according to the second embodiment is configured as described above, substantially the same effect as the vehicular headlamp 1 of the first embodiment can be achieved.

(Description of examples other than Embodiments 1 and 2)
In the first and second embodiments, the vehicle headlamp 1 when the vehicle C is on the left side will be described. However, the present invention can also be applied to a vehicle headlamp when the vehicle C is right-hand traffic.

  In the first and second embodiments, the main lens portion 30 and the auxiliary lens portion 31 of the lens 3 are integrated. However, in the present invention, the main lens portion 30 and the auxiliary lens portion 31 of the lens 3 may be separate.

  Further, in the first and second embodiments, the light control member 4 is rotated between the first position and the second position. However, in the present invention, the light control member 4 may be slid between the first position and the second position. In this case, a slide means is provided instead of the rotating shaft.

  Furthermore, in Embodiments 1 and 2, a solenoid 50 is used as the drive member 5. However, in the present invention, a member other than the solenoid 50 such as a motor may be used as the drive member 5. In this case, a driving force transmission mechanism is provided between the motor and the light control member 4.

  Furthermore, in the first and second embodiments, the auxiliary lens portion 31 of the lens 3 is a total reflection type lens portion. However, in the present invention, the auxiliary lens portion of the lens 3 may be a lens portion other than the total reflection type lens portion, for example, a refraction type lens portion or a Fresnel type lens portion.

  Furthermore, in the first embodiment, the auxiliary lens unit 31 is positioned below the main lens unit 30, and the first position of the light control member 4 is positioned below, so that the variable focus is achieved. The focal point F40U of the upper portion 40U of the lens unit 40 is displaced downward, and the focal point F40D of the lower portion 40D of the variable focus lens unit 40 is displaced upward. However, in the present invention, the auxiliary lens unit 31 is positioned below the main lens unit 30 and the first position of the light control member 4 is positioned below. Alternatively, the focus F40U of the upper portion 40U may be displaced upward, and the focus F40D of the lower portion 40D of the variable focus lens unit 40 may be displaced downward.

  Furthermore, in the second embodiment, the auxiliary lens unit 31 is positioned above the main lens unit 30 and the first position of the light control member 4 is positioned above the variable lens unit. The focus F40U of the upper portion 40U of 40 is displaced upward, and the focus F40D of the lower portion 40D of the variable focus lens section 40 is displaced downward. However, in the present invention, the auxiliary lens unit 31 is positioned above the main lens unit 30 and the first position of the light control member 4 is positioned above the variable lens unit 40. The focal point F40U of the portion 40U may be displaced downward, and the focal point F40D of the lower portion 40D of the variable focus lens unit 40 may be displaced upward.

  In the first and second embodiments, the first light distribution pattern is the low beam light distribution pattern LP, and the second light distribution pattern is the high beam light distribution pattern HP. However, in the present invention, as the first light distribution pattern, a light distribution pattern other than the low beam light distribution pattern LP, such as AFS or ADB, is distributed below the horizontal line HL-HR on the left and right of the screen. The second light distribution pattern may be a light pattern other than the high beam light distribution pattern HP, for example, AFS, ADB, etc., above the horizontal line HL-HR on the left and right of the screen. It may be a light distribution pattern to be irradiated.

DESCRIPTION OF SYMBOLS 1 Vehicle headlamp 2 Semiconductor type light source 20 Light emitting chip 21 Board | substrate 22 Connector 23 Light emitting surface 3 Lens 30 Main lens part 300 Incident surface of main lens part 301 Outgoing surface of main lens part 31 Auxiliary lens part 310 Incident of auxiliary lens part Surface 311 Reflective surface of auxiliary lens unit 312 Emission surface of auxiliary lens unit 32 Mounting unit 4 Light control member 40 Variable focus lens unit 40C Middle portion 40D Lower portion 40U Upper portion 400 Incident surface 401 Emission surface 41 Mounting portion 42 Long Hole 43 Rotating hole 44 Stopper 5 Drive member 50 Solenoid 51 Connecting pin 52 Spring 53 Mounting portion 54 Advance / Retreat rod 6 Lens cover member 60 Opening portion 61 Mounting portion 7 Bearing member 70 Opening portion 71 Mounting portion 72 Shaft portion 73 Stopper 8 Base member 80 Light source mounting part 81 Lens mounting part 82 Base mounting part 9 Cooling member C Vehicle F Reference focus of lens F1 Pseudo focus F40C Focus on middle part F40D Focus on lower part F40U Focus on upper part HL-HR Horizontal horizontal line HP, HPA High beam light distribution pattern HPM, HPMA Variable light distribution pattern HPM1 First variable light distribution pattern HPM2 Second variable light distribution pattern HPM3 Third variable light distribution pattern HZ Hot zone L1 Central light L2 Other part of ambient light L3 Emission from the upper part of the variable focus lens part Outgoing light L4 Downward outgoing light L5 Upward outgoing light LP Low beam light distribution pattern O Light emitting surface center O1 Center of rotation VU-VD Vertical line of the screen WD Lower opening WU Upper opening X X-axis Y Y Axis Z Reference optical axis of the lens (Z axis)
θ1, θ2 rotation angle

Claims (6)

A semiconductor light source;
A lens that emits light from the semiconductor-type light source to the front of the vehicle as a first light distribution pattern and a second light distribution pattern, and
A light control member;
A drive member that positions the light control member so as to be switchable between a first position and a second position;
With
The lens is
When the light control member is positioned at the first position is a position between the semiconductor-type light source and the auxiliary lens unit irradiates the first light distribution pattern forward of the vehicle,
When the light control member is located at the second position, which is a position between the semiconductor-type light source and the main lens portion, the second light distribution pattern is irradiated to the front of the vehicle,
The focal point of the upper part of the light control member is displaced above or below the focal point of the other part,
The focal point of the lower part of the light control member is displaced downward or above the focal point of the other part,
A vehicle headlamp characterized by that. The focal points of the upper and lower intermediate portions of the light control member are not displaced on both upper and lower sides,
The vehicle headlamp according to claim 1. When the light control member is located at the first position, the focal point of the portion that is on the optical axis side of the main lens portion is displaced downward with respect to the focal point of the other portion,
Of the light control member, when located at the first position, the focal point of the portion opposite to the optical axis side of the main lens portion is displaced upward with respect to the focal point of the other portion.
The vehicle headlamp according to claim 1 or 2, characterized in that The light control member is rotated between the first position and the second position by the driving member,
The rotation center of the light control member is located on the rear side of the light emitting surface of the semiconductor-type light source.
The vehicle headlamp according to any one of claims 1 to 3, wherein The auxiliary lens portion is disposed below the main lens portion,
The vehicle headlamp according to any one of claims 1 to 4, wherein The light control member located at the first position and the auxiliary lens unit partially overlap each other in the vertical direction.
The vehicular headlamp according to claim 5.

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