JP4544237B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a projector-type vehicular lamp that uses a semiconductor-type light source such as an LED as a light source. In particular, the present invention can reduce the horizontal depth dimension, and can prevent light other than a predetermined light distribution pattern projected from the projection lens from being emitted from the projection lens. It relates to lighting equipment.

  Conventionally, this type of vehicle lamp is known (for example, Patent Document 1, Patent Document 2, and Patent Document 3). Hereinafter, the vehicle lamp will be described. A conventional vehicular lamp includes a reflector having an ellipse or an ellipse-based reflection surface, and a semiconductor light source such as an LED disposed so that a light emitting unit is positioned at or near the first focal point of the reflection surface; And a projection lens that is provided on the reflector and projects a predetermined light distribution pattern in a predetermined direction.

  Hereinafter, the operation of the conventional vehicle lamp will be described. A semiconductor-type light source such as an LED is turned on to emit light. Then, light from a semiconductor-type light source such as an LED is reflected by the reflecting surface and projected (irradiated, emitted, and emitted) in a predetermined direction as a predetermined light distribution pattern from the projection lens.

  However, in the conventional vehicle lamp, the optical axis of the reflecting surface and the optical axis of the projection lens are substantially horizontal, and the semiconductor-type light source such as the LED, the reflector, and the projection lens are arranged in the horizontal direction or the substantially horizontal direction. Therefore, the horizontal depth dimension becomes large. For this reason, the conventional vehicular lamp cannot respond to the need to reduce the depth dimension in the horizontal direction.

  Conventionally, a vehicular lamp (a vehicular headlamp) that uses a planar or substantially planar reflecting surface to shorten the front-rear length (decreases the horizontal depth dimension) has been conventionally used (for example, Patent Documents). 4). However, this conventional vehicular lamp uses a discharge bulb as a light source, and does not use a semiconductor-type light source such as an LED. In addition, in this conventional vehicular lamp, the optical axis of the projection lens extends in the vehicle longitudinal direction (horizontal direction), the optical axis of the reflector intersects the optical axis of the projection lens, and the reflected light from the reflector is planar. Alternatively, the light is reflected on the projection lens side by a substantially planar reflecting surface. For this reason, this conventional vehicle lamp has a discharge bulb, a reflector, a projection lens, and a planar or substantially planar reflecting surface arranged in the vehicle front-rear direction. The depth dimension in the direction increases, and the need to reduce the depth dimension in the horizontal direction cannot be met.

  Moreover, the conventional vehicular lamp does not consider means for preventing light other than the predetermined light distribution pattern projected from the projection lens from being emitted from the projection lens. For this reason, in the conventional vehicular lamp, light other than the predetermined light distribution pattern projected from the projection lens, that is, light that is not subjected to light distribution control may be emitted from the projection lens.

JP 2006-107955 A JP 2005-302328 A JP 2004-31224 A JP 2005-228715 A

  The problems to be solved by the present invention are that the conventional vehicular lamp cannot respond to the need to reduce the depth dimension in the horizontal direction, and other than the predetermined light distribution pattern projected from the projection lens. However, there is a case where light that is not subjected to light distribution control may be emitted from the projection lens.

  According to the present invention (the invention according to claim 1), a plane reflecting surface is arranged so as to intersect the lens optical axis of the projection lens between the projection lens and the lens focal point of the projection lens, and further, from the semiconductor-type light source. A light-shielding member that blocks direct light from entering the projection lens is disposed between the semiconductor-type light source and the projection lens.

  Further, according to the present invention (the invention according to claim 2), the light blocking member blocks the direct light from the semiconductor-type light source from entering the projection lens from the projection lens side to the plane reflecting surface side, and the semiconductor-type light source It is provided in a range in which the direct light from the light can enter the plane reflecting surface.

  Further, according to the present invention (the invention according to claim 3), the light blocking member blocks the direct light from the semiconductor-type light source from entering the projection lens from the projection lens side to the plane reflection surface side, and from the reflection surface. Is provided in a range where the reflected light from the plane reflecting surface can enter the projection lens and the reflected light from the plane reflecting surface can enter the projection lens.

  Furthermore, in the present invention (the invention according to claim 4), the semiconductor light source is in contact with the heat sink member so that the substrate surface of the semiconductor light source is vertical or substantially vertical, and the heat sink member is vertical. It is characterized in that it is provided in a vertical or almost vertical position.

  Furthermore, the present invention (the invention according to claim 5) is arranged between the reflective surface, ie, the second focal point of the first reflective surface or the vicinity thereof, and the semiconductor-type light source, and is radiated from the semiconductor-type light source. A flat surface or a substantially flat surface along the optical axis of the first reflective surface is provided, which includes a shade that cuts off part of the reflected light reflected by the reflective surface and forms a predetermined light distribution pattern having a cutoff line with the remaining reflected light. A second reflecting surface that reflects the reflected light cut off by the shade and forms a predetermined auxiliary light distribution pattern is provided on the shade.

  Furthermore, according to the present invention (the invention according to claim 6), the light shielding member is directed from the projection lens side to the plane reflecting surface side, and the direct light from the semiconductor-type light source and the reflected light from the second reflecting surface enter the projection lens. The reflected light from the first reflecting surface and the reflected light from the second reflecting surface can be incident on the planar reflecting surface, and the reflected light from the planar reflecting surface can be incident on the projection lens. It is provided in a possible range.

  In the vehicle lamp of the present invention (the invention according to claim 1), a plane reflecting surface is arranged so as to intersect the lens optical axis of the projection lens between the projection lens and the lens focal point of the projection lens. . As a result, the vehicular lamp of the present invention (the invention according to claim 1) exists as a pseudo lens focus at a position where the lens focus of the projection lens is symmetrical with respect to the plane reflection surface by the plane reflection surface. The lens focal point is located at or near the second focal point of the reflecting surface based on an ellipse, and the lens optical axis of the substantially horizontal projection lens is substantially perpendicular to the substantially horizontal lens optical axis by the planar reflecting surface. As a pseudo lens optical axis, the substantially vertical pseudo lens optical axis coincides with or substantially coincides with the optical axis of the reflecting surface. As a result, the vehicular lamp of the present invention (the invention according to claim 1) arranges the projection lens and the plane reflection surface in a substantially horizontal direction, and the projection lens, plane reflection surface, reflector, semiconductor-type light source, and The shade can be arranged in a substantially vertical direction. Therefore, the vehicular lamp according to the present invention (the invention according to claim 1) can reduce the horizontal depth dimension, and can meet the need to reduce the horizontal depth dimension.

  Moreover, in the vehicular lamp according to the present invention (the invention according to claim 1), a light shielding member for blocking direct light from the semiconductor light source from entering the projection lens is disposed between the semiconductor light source and the projection lens. It is possible to prevent light other than the predetermined light distribution pattern projected from the projection lens, that is, light that is not subjected to light distribution control, from being emitted from the projection lens, thereby contributing to traffic safety. it can. Moreover, the vehicular lamp according to the present invention (the invention according to claim 1) is incident on the reflection surface side of the semiconductor light source side from the projection lens by the light shielding member disposed between the semiconductor light source and the projection lens. It is possible to block outside light to be tried. As a result, the vehicular lamp according to the present invention (the invention according to claim 1) is semiconductor type even if the external light is reflected by the reflecting surface and emitted from the projection lens to the outside and the semiconductor light source is not lit. Pseudo lighting that appears as if the light source is lit can be prevented.

  In the vehicle lamp of the present invention (the invention according to claim 2), the means for solving the above-described problems blocks the direct light from the semiconductor-type light source from entering the projection lens, while the semiconductor-type light source The direct light from can enter the plane reflecting surface. For this reason, the vehicular lamp of the present invention (the invention according to claim 2) can effectively use a part of the direct light from the semiconductor-type light source that does not enter the projection lens. An efficient lamp can be provided.

  Further, the vehicle lamp of the present invention (the invention according to claim 3) prevents direct light from the semiconductor-type light source from being incident on the projection lens by means for solving the above-described problems, while the light from the reflecting surface. The reflected light can be incident on the planar reflecting surface and the reflected light from the planar reflecting surface can be incident on the projection lens. For this reason, the vehicular lamp of the present invention (the invention according to claim 3) can be applied to the planar reflecting surface and the projection lens without blocking the reflected light from the reflecting surface and the reflected light from the planar reflecting surface by the light shielding member. It is possible to provide a lamp that can be reliably incident and can be reliably used without losing light whose light distribution is controlled.

  Furthermore, in the vehicular lamp of the present invention (the invention according to claim 4), the semiconductor light source contacts the heat sink member via the holder member so that the substrate surface of the semiconductor light source is vertical or substantially vertical. The heat sink member is provided vertically. As a result, in the vehicular lamp according to the present invention (the invention according to claim 6), the semiconductor-type light source and the heat sink member are arranged horizontally, so that the heat generated in the semiconductor-type light source is transmitted through the vertical heat sink member. It can diverge efficiently. In addition, the vehicular lamp according to the present invention (the invention according to claim 4) can arrange the reflector, the semiconductor-type light source, the projection lens, the plane reflecting surface side, and the heat sink member side horizontally, so that the upper side of the heat sink member. Can be opened to the open air. As a result, the vehicular lamp of the present invention (the invention according to claim 4) can dissipate the heat of the semiconductor light source more efficiently into the outside air.

  Furthermore, the vehicular lamp of the present invention (the invention according to claim 5) is provided with a semiconductor type by a shade disposed between the reflective surface, that is, the second focal point of the first reflective surface or the vicinity thereof and the semiconductor type light source. A part of the reflected light emitted from the light source and reflected by the first reflecting surface can be cut off, and a predetermined light distribution pattern having a cutoff line can be formed with the remaining reflected light. In addition, the vehicular lamp according to the present invention (the invention according to claim 5) is cut off by the shade by the second reflecting surface which is provided on the shade and is flat or substantially flat along the optical axis of the first reflecting surface. The reflected light can be reflected to form a predetermined auxiliary light distribution pattern, so that the light from the semiconductor light source can be used effectively.

  Furthermore, in the vehicular lamp of the present invention (the invention according to claim 6), the direct light from the semiconductor-type light source and the reflected light from the second reflecting surface are applied to the projection lens by means for solving the above problems. While blocking the incidence, the reflected light from the first reflecting surface and the reflected light from the second reflecting surface can be incident on the planar reflecting surface and the reflected light from the planar reflecting surface can be incident on the projection lens. it can. For this reason, the vehicular lamp of the present invention (the invention according to claim 6) effectively uses a part of the light that does not enter the projection lens among the direct light from the semiconductor light source and the reflected light from the second reflecting surface. It is possible to provide a lamp that can be used and has good light utilization efficiency. Moreover, the vehicular lamp of this invention (the invention according to claim 6) shields the reflected light from the first reflecting surface, the reflected light from the second reflecting surface, and the reflected light from the planar reflecting surface with a light shielding member. Therefore, it is possible to provide a lamp that can be reliably incident on the planar reflecting surface and the projection lens, and can be reliably used without losing the light subjected to the light distribution control.

  Embodiments of a vehicular lamp according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In this specification, “front, rear, upper, lower, left, right” is “front, rear, upper, lower, left, right” of the vehicle when the vehicle lamp is mounted on the vehicle.

  1 to 5 show Example 1 of a vehicular lamp according to the present invention. Hereinafter, the configuration of the vehicular lamp according to the first embodiment will be described. In this example, for example, an automotive headlamp will be described. In the figure, reference numeral 1 denotes a vehicular lamp according to the first embodiment. As shown in the figure, the vehicular lamp 1 is a projector type and has a unit structure. The vehicular lamp 1 includes a front first reflector (main reflector) 2, a rear second reflector (shade and reflector, sub-reflector) 3, a semiconductor light source 4, a shade 5, and a projection lens (convex lens). , Condenser lens) 6, flat reflecting surface 7, heat sink member 8, holder member 16, ring member 17, light shielding member 28, lamp housing and lamp lens of an automotive headlamp not shown (for example, A transparent outer lens).

  The first reflector 2, the second reflector 3, the semiconductor light source 4, the shade 5, the projection lens 6, the planar reflecting surface 7, the heat sink member 8, the holder member 16, the ring member 17, and the light shielding The member 28 constitutes a lamp unit. One or a plurality of the lamp units are arranged, for example, via an optical axis adjusting mechanism in a lamp chamber defined by a lamp housing and a lamp lens of an automotive headlamp. In some cases, a lamp unit other than the lamp unit is arranged in the lamp chamber to constitute the vehicular lamp according to the present invention.

  The first reflector 2 and the second reflector 3 are composed of a light-impermeable resin member and the like, and are also used as holding members such as a casing, a housing, and a holder. Further, the first reflector 2 and the second reflector 3 are vertically divided into two parts along the substantially vertical optical axis Z2-Z2 of the first reflecting surface 9 which will be described later. The first reflector 2, the second reflector 3, and the heat sink member 8 are integrally fixed by a fixing member (not shown) (for example, a bolt nut, a screw, a caulking, a clip, or a screw in this example). Yes.

  The first reflector 2 has an upper portion opened in a semicircular shape on the lower side, a central rear side portion opened, and a central front side portion closed. That is, the closed portion of the front portion at the center of the first reflector 2 has a convex shape that swells outward (from the rear side to the front side). The first reflecting surface 9 is provided on the concave inner surface of the closing portion of the front portion at the center of the first reflector 2 by applying aluminum vapor deposition or silver coating. In almost four corners of the first reflector 2, there are a plurality of screw holes 25 (or through holes through which the screws of the fixing member pass), in this example, four (in addition, In FIG. 2, two are shown).

  The first reflecting surface 9 is an ellipse or a reflecting surface based on an ellipse, for example, a rotating ellipsoid or a reflecting surface such as a free curved surface (NURBS curved surface) based on an ellipse (vertical in FIGS. 1, 3 and 4). The cross section is an elliptical surface, and the horizontal cross section (not shown) is a parabolic surface or a reflecting surface having a deformed parabolic surface). For this purpose, the first reflecting surface 9 has a first focal point F1 and a second focal point (focal line on the horizontal section, that is, both ends are located on the upper side and the center is located on the lower side when viewed from the front (front)). Such curved focal line) F2.

  The second reflector 3 is composed of a vertical plate portion, the upper portion of the plate portion is opened in a semicircular shape on the upper side, and the opening portion 10 is opened in the central portion on the lower side of the plate portion. It has been. The front surface of the plate portion of the second reflector 3 is subjected to aluminum deposition, silver coating, or the like, and a second reflecting surface that is flat or substantially flat along the optical axis Z2-Z2 of the first reflecting surface 9. 11 is provided. The second reflective surface 11 is provided between the second focal point F2 of the first reflective surface 9 or the vicinity thereof and the semiconductor-type light source 4. A plurality of screw holes 26 (or through holes through which the screws of the fixing member pass) are screwed into approximately four corners of the plate portion of the second reflector 3. (In FIG. 2, two are shown).

  As the semiconductor-type light source 4, for example, a self-luminous semiconductor-type light source (LED in this embodiment 1) such as LED and EL (organic EL) is used. The semiconductor light source 4 includes a substrate (not shown), a light emitting body (not shown) of a light source chip (semiconductor chip) having a small rectangular shape (square shape) fixed to one surface of the substrate, and the light emission. The light-transmitting member 13 that covers the body and a connector or harness (not shown) connected to a power source (not shown) are configured. The semiconductor light source 4 is held by the holder member 16. The semiconductor light source 4 is fixed to the second reflector 3 or the heat sink member 8 via the holder member 16. The light emitter (light emitting portion) of the semiconductor-type light source 4 is located at or near the first focal point F1 of the first reflecting surface 9.

  The shade 5 is provided integrally with the second reflector 3. That is, the shade 5 is also used as the plate portion of the second reflector 3. As a result, the shade 5 is provided with the second reflecting surface 11. The shade 5 is disposed between the semiconductor light source 4 and the second focal point F <b> 2 of the first reflecting surface 9 or the vicinity thereof. An edge 14 is provided along the second focal point F <b> 2 of the first reflective surface 9 at the second focal point F <b> 2 of the first reflective surface 9 or in the vicinity thereof in the shade 5. The shade 5 is a predetermined light distribution pattern that cuts off a part of the reflected light L4 emitted from the semiconductor-type light source 4 and reflected by the first reflecting surface 9, and has a cutoff line with the remaining reflected light, For example, a light distribution pattern for passing and a light distribution pattern for highways (not shown) are formed. The edge 14 of the shade 5 forms a cut-off line (not shown) and an elbow point (not shown) of the predetermined light distribution pattern.

  The projection lens 6 includes an edge of a semicircular opening that forms a lower semicircle of the first reflector 2 and an edge of a semicircular opening that forms an upper semicircle of the second reflector 3. It is positioned and attached by the ring member 17. The projection lens 6 is an aspheric lens convex lens. The front side (external side) of the projection lens 6 is a convex aspheric surface having a large curvature (the curvature radius is small), while the rear side (the plane reflecting surface 7 side) of the projection lens 6 is a small curvature. Convex aspherical surface (large curvature radius). By using such a projection lens 6, the focal length of the projection lens 6 is reduced, and accordingly, the horizontal or substantially horizontal lens light of the projection lens 6 of the vehicular lamp 1 according to the first embodiment. The dimension in the direction of the axis Z1-Z1 becomes compact. The rear side of the projection lens 6 may be a flat aspheric surface.

  The projection lens 6 includes a lens focal point FL1 that is a front focal point (focal point on the plane reflecting surface 7 side) located at a position of a front focus (front focal length) FF from the projection lens 6, and a back focal point from the projection lens 6. A horizontal or substantially horizontal lens optical axis Z1-Z1 connecting the rear focal point (external focal point) located at the position of (rear focal distance) and the lens focal point FL1 of the front focal point and the rear focal point; Have The optical axis Z2-Z2 of the first reflecting surface 9 that is vertical or substantially vertical and the lens optical axis Z1-Z1 of the projection lens 6 that is horizontal or substantially horizontal are orthogonal to each other. The lens focal point FL1 of the projection lens 6 is a meridional image plane that is a focal plane on the object space side. In addition, since the light of the semiconductor-type light source 4 does not have high heat, a resin lens can be used as the projection lens 6. The projection lens 6 uses acrylic in this example. The projection lens 6 includes a predetermined auxiliary light distribution pattern (not shown) formed by the predetermined light distribution pattern having a cutoff line reflected by the planar reflection surface 7 and the reflected light from the second reflection surface 11. ) Is projected forward.

  The planar reflecting surface 7 has a planar plate shape, and is provided integrally between the semicircular opening on the upper side of the second reflector 3 and the edge 14 of the shade 5. The surface of the planar reflecting surface 7 is subjected to aluminum vapor deposition or silver coating. The plane reflecting surface 7 is disposed between the projection lens 6 and the lens focal point FL1 of the projection lens 6 so as to intersect the lens optical axis Z1-Z1 at 45 ° or substantially 45 °. The plane reflecting surface 7 reflects the predetermined light distribution pattern and auxiliary light distribution pattern having a cut-off line toward the projection lens 6 side.

  As shown in FIGS. 3 and 4, the lens focal point FL <b> 1 of the projection lens 6 exists as a pseudo lens focal point FL <b> 2 at a position symmetric with respect to the planar reflecting surface 7 due to the planar reflecting surface 7. The pseudo lens focal point FL2 is located at or near the second focal point F2 of the first reflecting surface 9. Further, the lens optical axis Z1-Z1 of the horizontal or substantially horizontal projection lens 6 is also horizontally or substantially horizontal by the plane reflecting surface 7, as shown in FIGS. Exists as a pseudo lens optical axis Z3-Z3 perpendicular or substantially perpendicular to the vertical axis. The pseudo lens optical axis Z3-Z3 which is vertical or substantially vertical coincides with or substantially coincides with the optical axis Z2-Z2 of the first reflecting surface 9.

  As a result, as shown in FIG. 3, when the parallel light L1 of the extraneous light enters the projection lens 6 from the outside, passes through the projection lens 6 and exits from the projection lens 6, the lens focal point of the projection lens 6 is obtained. Trying to focus on FL1. The emitted light from the projection lens 6 to be focused is reflected by the planar reflecting surface 7, and the reflected light L2 is focused on the pseudo lens focal point FL2, that is, the second focal point F2 of the first reflecting surface 9. . Further, as shown in FIGS. 3 and 4, the horizontal or substantially horizontal lens optical axis Z1-Z1 is a vertical or substantially vertical pseudo lens optical axis Z3-Z3 bent at a right angle by the plane reflecting surface 7. That is, it becomes the optical axis Z2-Z2 of the first reflecting surface 9.

  The heat sink member 8 is formed by integrally providing a plurality of fins 15 on the rear surface (rear surface, rear surface) of the flat plate with an appropriate interval in the vertical direction. The heat sink member 8 is provided vertically or substantially vertically, that is, vertically. A flat rear surface of the substrate of the semiconductor-type light source 4 is in contact with the front surface (front surface, front surface) of the flat plate of the heat sink member 8 via the holder member 16 so that the planar rear surface of the substrate is vertical or substantially vertical. The heat sink member 8 radiates heat generated in the semiconductor light source 4 to the outside. In approximately four corners of the flat plate of the heat sink member 8, there are a plurality of screw holes 27 into which screws of the fixing member are screwed. In this example, four screw holes 27 (two are shown in FIG. 2). Is provided.

  The holder member 16 holds the semiconductor-type light source 4 and fixes it to the second reflector 3 or the heat sink member 8 with a screw (not shown). The holder member 16 and the second reflector 3 are provided with positioning portions, respectively.

  The positioning unit determines the positions of the second reflector 3 and the semiconductor light source 4. The positioning part is a semicircular or substantially semicircular convex fitting part (hereinafter referred to as “convex fitting part”) 20 provided at the edge of the opening 10 of the second reflector 3. And a concave fitting portion (hereinafter referred to as a “concave fitting portion”) 21 having a semicircular shape or a substantially semicircular shape provided on the edge of the holder member 16. In addition, the shape of the convex fitting part 20 and the concave fitting part 21 may be a semicircular shape or a shape other than a substantially semicircular shape, for example, a triangle, a quadrangle, an ellipse, or the like.

  The convex fitting portion 20 and the concave fitting portion 21 of the positioning portion are two so as to face each other in a direction (in this example, the left-right direction) orthogonal to or substantially orthogonal to the fitting direction (front-rear direction). It is provided one by one. The concave fitting portion 21 is integrally provided with a stopper portion that determines the position in the fitting direction. The stopper is provided with a screw hole into which the screw is screwed (or a through hole through which the screw passes).

  When the convex fitting part 20 and the concave fitting part 21 are fitted, the positions of the second reflector 3 and the semiconductor light source 4 in three directions are determined. The three directions are the direction in which the two convex fitting portions 20 and the concave fitting portion 21 are opposed (left-right direction), and the direction intersecting the opposite direction (in this example, the vertical direction); The three directions are the fitting direction (front-rear direction).

  The light shielding member 28 is provided integrally with the first reflector 2 and is made of a light impermeable member. As shown in FIG. 1, the light shielding member 28 blocks the direct light L 6 from the semiconductor light source 4 from entering the projection lens 6 between the semiconductor light source 4 and the projection lens 6. Is arranged.

  The light shielding member 28 blocks direct light L6 from the semiconductor-type light source 4 from entering the projection lens 6 from the projection lens 6 side to the plane reflecting surface 7 side, and from the semiconductor-type light source 4 The direct light L8 is provided in a range in which the light can enter the plane reflecting surface 7. That is, one end of the light shielding member 28 is fixed to the edge of the semicircular opening of the first reflector 2 (the place where the projection lens 6 is attached), and the other end is the shade 5 and the The second reflecting surface 11 or the second reflecting surface 9 of the first reflecting surface 9 extends toward the flat reflecting surface 7 side. The light shielding member 28 may have a flat plate shape, a curved plate shape, or other shapes.

  The vehicular lamp 1 according to the first embodiment is configured as described above, and how to assemble it will be described below.

  First, a screw is screwed from the screw hole 23 of the holder member 16 to the front surface of the flat plate of the heat sink member 8, that is, from the front side to the rear side in the fitting direction, and the semiconductor light source 4 is mounted on the front surface of the flat plate of the heat sink member 8. It is fixed via the member 16.

  Next, the rear surface of the plate portion of the second reflector 3 is aligned with the front surface of the flat plate of the heat sink member 8. At this time, the convex fitting part 20 of the positioning part of the second reflector 3 and the concave fitting part 21 of the positioning part of the holder member 16 of the semiconductor light source 4 are fitted. Then, the positions of the second reflector 3 and the semiconductor-type light source 4 in the three directions are determined, and the semiconductor-type light source 4 is located at the opening 10 of the second reflector 3 via the holder member 16.

  Then, the rear surface of the first reflector 2 integrated with the light shielding member 28 is aligned with the front surface of the plate portion of the second reflector 3. As shown by arrow B in FIG. 25, the screw as the fixing member is fitted into the screw hole 27 of the heat sink member 8 from the screw hole 25 of the first reflector 2 through the screw hole 26 of the second reflector 3. The first reflector 2, the second reflector 3, and the heat sink member 8 are fixed simultaneously by screwing in the direction from the front side to the rear side.

  Or the convex fitting part 20 of the positioning part of the 2nd reflector 3 and the concave fitting part 21 of the positioning part of the holder member 16 of the semiconductor type light source 4 are fitted, and the 2nd reflector 3 and the semiconductor type light source 4 are fitted. And the semiconductor-type light source 4 is positioned at the opening 10 of the second reflector 3 via the holder member 16.

  Next, the screw is screwed into the rear surface of the plate portion of the second reflector 3 from the screw hole of the holder member 16, that is, from the rear side to the front side in the fitting direction, and the semiconductor light source 4 is moved to the plate portion of the second reflector 3. It is fixed to the rear surface via a holder member 16.

  Then, the rear surface of the plate portion of the second reflector 3 to which the semiconductor light source 4 is fixed via the holder member 16 is aligned with the front surface of the flat plate of the heat sink member 8. Further, the rear surface of the first reflector 2 integrated with the light shielding member 28 is aligned with the front surface of the plate portion of the second reflector 3. As shown by an arrow B in FIG. 2, the screw 18 as the fixing member is fitted into the screw hole 27 of the heat sink member 8 from the screw hole 25 of the first reflector 2 through the screw hole 26 of the second reflector 3. The first reflector 2, the second reflector 3, and the heat sink member 8 are fixed simultaneously by screwing in the opposite direction from the front side to the rear side.

  Then, the projection lens 6 is formed by a ring member 17 so as to form a semicircular opening edge that forms a semicircle on the lower side of the first reflector 2 and a semicircle on the upper side of the second reflector 3. Position and attach to the edge of the circular opening. 3 and 4, the illustration of the light shielding member 28 and the ring member 17 is omitted, and in FIG. 3, the hatching of the planar reflecting surface 7 integrated with the second reflector 3 is omitted. ing.

  The vehicular lamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  First, the light emitter of the semiconductor light source 4 of the vehicular lamp 1 is turned on. Then, light L3 is emitted from the light emitter of the semiconductor light source 4. The light L3 is reflected by the first reflecting surface 9, and the reflected light L4 is focused on the second focal point F2 and the pseudo lens focal point FL2 of the first reflecting surface 9. A part of the reflected light L4 focused on the second focus F2 and the pseudo lens focus FL2 is cut off by the shade 5. The reflected light L4 cut off by the shade 5 is reflected by the second reflecting surface 11 integral with the shade 5 to form a predetermined auxiliary light distribution pattern. On the other hand, a predetermined light distribution pattern having a cut-off line is formed by the remaining reflected light L4.

  The predetermined auxiliary light distribution pattern and the predetermined light distribution pattern having the cut-off line are combined by being transmitted through the projection lens 6 as light reflected from the plane reflecting surface 7 and emitted from the lens focal point FL1 of the projection lens 6. Then, it is projected in front of the automobile (vehicle) as a predetermined light distribution pattern (light L5 projected from the projection lens 6) to illuminate the road surface and the like.

  As shown in FIG. 1, of the direct light L6 and L8 from the semiconductor light source 4, the direct light L6 that is about to enter the projection lens 6 is blocked by the light shielding member 28 from entering the projection lens 6. Here, when the direct light L7 from the semiconductor-type light source 4 without the light shielding member 28, that is, the direct light L7 not subjected to light distribution control, enters the projection lens 6, it escapes obliquely upward from the projection lens 6. , May be glare. In FIG. 1, the direct light L7 passing through the projection lens 6 is shown in a straight line, but actually refracted when entering and exiting the projection lens 6. The vehicular lamp 1 according to the first embodiment can prevent the glare by the light shielding member 28. On the other hand, of the direct light L6 and L8 from the semiconductor-type light source 4, the light L8 that is not incident on the projection lens 6 can be incident on the planar reflecting surface 7 without being blocked by the light shielding member 28.

  Further, when heat is generated in the semiconductor light source 4 due to the light emission of the light emitter of the semiconductor light source 4, the heat is transmitted to the heat sink member 8, and is dissipated to the outside air (outside) via the heat sink member 8. Is done. On the contrary, external light (not shown) that is about to enter the first reflecting surface 9 and the second reflecting surface 11 on the semiconductor light source 4 side from the projection lens 6 is shielded by the light shielding member 28. For this reason, even if the external light is reflected by the first reflecting surface 9 and the second reflecting surface 11 and emitted again from the projection lens 6 to the outside and the semiconductor light source 4 is not turned on, the semiconductor light source 4 is turned on at all times. It is possible to prevent the pseudo lighting that looks as if it is.

  The vehicular lamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicular lamp 1 according to the first embodiment, the light shielding member 28 that blocks direct light L6 from the semiconductor light source 4 from entering the projection lens 6 is disposed between the semiconductor light source 4 and the projection lens 6. The light L7 other than the predetermined light distribution pattern projected from the projection lens 6, that is, the light L7 not subjected to light distribution control, can be prevented from being emitted from the projection lens 6. Thereby, the vehicular lamp 1 according to the first embodiment can contribute to traffic safety.

  Further, the vehicular lamp 1 according to the first embodiment is reversed by the light-shielding member 28 disposed between the semiconductor-type light source 4 and the projection lens 6. In addition, it is possible to shield external light (not shown) that is about to enter the second reflecting surface 11 side. As a result, in the vehicular lamp 1 according to the first embodiment, the external light is reflected by the first reflecting surface 9 and the second reflecting surface 11 and is emitted again from the projection lens 6 to turn on the semiconductor light source 4. Even if it is not, it is possible to prevent pseudo-lighting that appears as if the semiconductor light source 4 is lighted.

  Furthermore, in the vehicular lamp 1 according to the first embodiment, the light shielding member 28 blocks direct light L6 from the semiconductor light source 4 from entering the projection lens 6, while direct light L8 from the semiconductor light source 4 is blocked. The light can enter the plane reflecting surface 7. For this reason, the vehicular lamp 1 according to the first embodiment can effectively use a part of the light L8 that is not incident on the projection lens 6 among the direct-lights L6 and L8 from the semiconductor-type light source 4. It is possible to provide a lamp with high utilization efficiency.

  Furthermore, in the vehicular lamp 1 according to the first embodiment, the plane reflecting surface 7 intersects the lens optical axis Z1-Z1 of the projection lens 6 between the projection lens 6 and the lens focal point FL1 of the projection lens 6. And arrange them. As a result, the vehicular lamp 1 according to the first embodiment exists as the pseudo lens focal point FL2 at a position where the lens focal point FL1 of the projection lens 6 is symmetric with respect to the planar reflecting surface 7 by the planar reflecting surface 7. The pseudo lens focal point FL2 is positioned at or near the second focal point F2 of the first reflecting surface 9 whose base is an ellipse, and the lens optical axis Z1-Z1 of the substantially horizontal projection lens 6 is approximately horizontal by the planar reflecting surface 7. Exists as a substantially vertical pseudo lens optical axis Z3-Z3 orthogonal to the lens optical axis Z1-Z1, and the substantially vertical pseudo lens optical axis Z3-Z3 is on the optical axis Z2-Z2 of the first reflecting surface 9. Match or nearly match. As a result, the vehicular lamp 1 according to the first embodiment has the projection lens 6 and the plane reflecting surface 7 disposed in the horizontal direction or the substantially horizontal direction, and the projection lens 6 and the plane reflecting surface 7 and the first reflector. The second and second reflectors 3, the semiconductor-type light source 4, and the shade 5 can be arranged in a vertical direction or a substantially vertical direction. Therefore, the vehicular lamp 1 according to the first embodiment can reduce the horizontal depth dimension W, and can meet the need to reduce the horizontal depth dimension W.

  Furthermore, in the vehicular lamp 1 according to the first embodiment, the semiconductor light source 4 is attached to the heat sink member 8 through the substrate of the semiconductor light source 4 so that the plane of the substrate is substantially vertical. The heat sink member 8 is provided almost vertically. As a result, in the vehicular lamp 1 according to the first embodiment, since the semiconductor light source 4 and the heat sink member 8 are arranged substantially horizontally, the heat generated in the semiconductor light source 4 is transferred to the heat sink member 8 that is placed almost vertically. It is possible to diverge efficiently. Moreover, in the vehicle lamp 1 according to the first embodiment, the first reflector 2, the second reflector 3, the semiconductor-type light source 4, the shade 5, the projection lens 6, the plane reflecting surface 7, and the heat sink member 8 are arranged substantially horizontally. Therefore, the upper part of the heat sink member 8 can be opened to the outside air. Thereby, the vehicular lamp 1 according to the first embodiment can dissipate the heat of the semiconductor light source 4 to the outside air more efficiently from the bottom to the top as shown by the solid arrows in FIGS. 3 and 4. it can.

  Furthermore, the vehicular lamp 1 according to the first embodiment is separated from the semiconductor-type light source 4 by the shade 5 disposed between the semiconductor-type light source 4 and the second focal point F2 of the first reflecting surface 11 or the vicinity thereof. A part of the reflected light L4 radiated and reflected by the first reflecting surface 9 can be cut off, and a predetermined light distribution pattern having a cutoff line can be formed with the remaining reflected light. In addition, the vehicular lamp 1 according to the first embodiment is cut off at the shade 5 by the second reflecting surface 11 that is provided on the shade 5 and forms a substantially flat surface along the optical axis Z2-Z2 of the first reflecting surface 9. Since the reflected light can be reflected and formed into a predetermined auxiliary light distribution pattern, the light from the semiconductor-type light source 4 can be used effectively.

  Furthermore, the vehicular lamp 1 according to the first embodiment includes the convex fitting portion 20 of the positioning portion of the second reflector 3 and the concave fitting portion 21 of the positioning portion of the holder member 16 via the holder member 16. A semiconductor-type light source 4 fixed to the second reflector 3 or the heat sink member 8, a first reflecting surface 9 of the first reflector 2, a second reflecting surface 11, a planar reflecting surface 7, and a projection lens 6 of the second reflector 3; Can be positioned with high accuracy. Therefore, in the vehicular lamp 1 according to the first embodiment, the light L3 from the semiconductor-type light source 4 is reflected by the first reflecting surface 9, the second reflecting surface 11, and the planar reflecting surface 7 to be externally provided from the projection lens 6. Thus, it is possible to obtain a predetermined light distribution pattern projected in a predetermined direction and a highly accurate light distribution pattern. The vehicular lamp 1 according to the first embodiment can contribute to traffic safety by obtaining a highly accurate light distribution pattern.

  Furthermore, the vehicular lamp 1 according to the first embodiment includes a convex fitting portion 20 provided at the edge of the opening 10 of the second reflector 3 and a concave fitting portion provided at the edge of the holder member 16. The positioning part is composed of 21. For this reason, the vehicular lamp 1 according to the first embodiment is configured such that the convex fitting portion 20 and the concave fitting portion 21 having a simple structure are fitted to each other so that the semiconductor light source 4 and the first reflector 2 The relative positional relationship between the first reflecting surface 9 and the second reflecting surface 11 of the second reflector 3, the planar reflecting surface 7, and the projection lens 6 can be positioned with high accuracy, and a highly accurate light distribution pattern can be obtained.

  Furthermore, in the vehicular lamp 1 according to the first embodiment, when the two convex fitting portions 20 and the concave fitting portion 21 are respectively fitted, the two convex fitting portions 20 and the concave fitting portion 21 are fitted. Can be positioned in three directions, ie, a direction (horizontal direction) facing each other, a direction intersecting with the facing direction (vertical direction), and a fitting direction (front-rear direction). As a result, the vehicular lamp 1 according to the first embodiment includes the semiconductor light source 4, the first reflecting surface 9 of the first reflector 2, the second reflecting surface 11, the planar reflecting surface 7, and the projection lens 6 of the second reflector 3. Can be positioned with higher accuracy, and a highly accurate light distribution pattern can be obtained.

  Furthermore, the vehicular lamp 1 according to the first embodiment includes a semiconductor light source 4, a first reflecting surface 9 of the first reflector 2, a second reflecting surface 11, a planar reflecting surface 7, and a projection lens 6 of the second reflector 3. The relative positional relationship between the first reflector 2, the second reflector 3, and the heat sink member 8 can be used as a fixing member. Since it can fix simultaneously with a screw, assembly workability | operativity is improved.

  FIG. 6 shows Embodiment 2 of the vehicular lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 5 denote the same components. Hereinafter, the vehicular lamp 100 according to the second embodiment will be described.

  In the vehicular lamp 100 according to the second embodiment, the light shielding member 29 receives the direct light L6 from the semiconductor-type light source 4 and the reflected light L9 from the second reflecting surface 11 from the projection lens 6 side to the plane reflecting surface side 7. The incident light to the projection lens 6 is blocked, and the reflected light L4 from the first reflecting surface 9 and the reflected light L11 from the second reflecting surface 11 can be incident on the planar reflecting surface 7 and from the planar reflecting surface 7. The reflected lights L5 and L12 are provided in a range where they can enter the projection lens 6. Here, when the reflected light L9 from the first reflecting surface 11 is incident on the projection lens 6 without the light shielding member 29, it may escape obliquely upward from the projection lens 6 and may cause glare. In FIG. 6, the reflected light L10 passing through the projection lens 6 is shown in a straight line, but actually refracted when entering and exiting the projection lens 6.

  Since the vehicular lamp 100 according to the second embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the vehicular lamp 1 according to the first embodiment. In particular, in the vehicular lamp 100 according to the second embodiment, the light blocking member 29 blocks the direct light L6 from the semiconductor light source 4 and the reflected light L9 from the second reflecting surface 11 from entering the projection lens 6. The reflected light L4 from the first reflecting surface 9 and the reflected light L11 from the second reflecting surface 11 can be incident on the planar reflecting surface 7, and the reflected lights L5 and L12 from the planar reflecting surface 7 are incident on the projection lens 6. Can be incident. For this purpose, the vehicular lamp 100 according to the second embodiment includes a projection lens 6 among the direct light L6 and L8 (see FIG. 1) from the semiconductor light source 4 and the reflected light L9 and L11 from the second reflecting surface 11. A portion of the light L8 (see FIG. 1) and L11 that do not enter the light can be used effectively, and a lamp with good light utilization efficiency can be provided. In addition, the vehicular lamp 100 according to the second embodiment includes the reflected light L4 from the first reflecting surface 9, the reflected light L11 from the second reflecting surface 11, and the reflected lights L5 and L12 from the flat reflecting surface 7, Without being blocked by the light shielding member 29, the light can be reliably incident on the planar reflecting surface 7 and the projection lens 6, respectively, and the light L4, L11, L5, and L12 whose light distribution has been controlled can be used without loss. Can be provided. In addition, the light shielding member 29 of the vehicular lamp 100 according to the second embodiment is longer and wider than the light shielding member 28 of the vehicular lamp 1 according to the first embodiment. That is, the opening between the projection lens 6 and the plane reflecting surface 7 side and the first reflecting surface 9 and the second reflecting surface 11 side is smaller and narrower than the opening of the vehicular lamp 1 according to the first embodiment. Therefore, the effect of preventing the pseudo lighting is further improved.

  In the first and second embodiments, an automotive headlamp will be described as a vehicular lamp. However, in the present invention, the vehicle lamp may be a lamp other than the automotive headlamp, for example, a rear combination lamp tail lamp, brake lamp, tail brake lamp, backup lamp, or the like.

  Moreover, in the said Example 1, 2, the example which has the 1st reflective surface 9 and the 2nd reflective surface 11 is demonstrated. However, in the present invention, only a reflecting surface based on an ellipse may be used.

  Furthermore, in the said Example 1, 2, the predetermined light distribution pattern and auxiliary light distribution pattern which have a cut-off line are irradiated. However, in the present invention, the predetermined light distribution pattern includes a light distribution pattern having no cut-off line, for example, a fog lamp light distribution pattern, a wet road light distribution pattern, a detime lamp light distribution pattern, and a tail lamp distribution. It may be a light pattern, a brake lamp light distribution pattern, a tail / brake lamp light distribution pattern, a backup lamp light distribution pattern, or the like.

  Furthermore, in the said Example 1, 2, the 1st reflector 2 and the 2nd reflector 3 are formed separately, and it fixes integrally with the heat sink member 8 with a fixing member. However, in the present invention, the first reflector 2 and the second reflector 3 may be integrally formed.

  In the first and second embodiments, the ring member 17 is used to attach the projection lens 6 to the first reflector 2 and the second reflector 3. However, in the present invention, without using the ring member 17, the projection lens 6 is attached to the projection lens 6, the first reflector 2, and the second reflector 3, and the projection lens 6 is attached to the first reflector 2 and the second reflector 3. It may be attached directly to.

  In the first and second embodiments, the projection lens 6 and the first reflector 2 and the second reflector 3 are separately formed and attached to each other. However, in the present invention, the projection lens 6 and the first reflector 2 and the second reflector 3 may be integrally formed. In this case, the ring member 17 and the mounting portion are not necessary.

  Furthermore, in the first and second embodiments, the planar reflecting surface 7 is provided integrally with the second reflector 3. However, in the present invention, the member that forms the planar reflecting surface 7 and the second reflector 3 may be formed separately, and the member that forms the planar reflecting surface 7 may be attached to the second reflector 3.

  Furthermore, in the said Example 1, 2, the positioning part of the convex fitting part 20 and the concave fitting part 21 is provided 2 each. However, in the present invention, one or three or more positioning portions may be provided.

  Furthermore, in the first and second embodiments, the light shielding members 28 and 29 are provided integrally with the first reflector 2. However, in the present invention, the member forming the light shielding members 28 and 29 and the first reflector 2 may be formed separately, and the member forming the light shielding members 28 and 29 may be attached to the first reflector 2.

  Furthermore, the light shielding member blocks the direct light L6 (see FIG. 1) from the semiconductor-type light source 4 from entering the projection lens 6 from the projection lens 6 side to the plane reflecting surface 7 side, and the first reflecting surface. 9 is provided in a range where the reflected light L4 (see FIG. 6) from 9 can enter the planar reflecting surface 7 and the reflected light L5 (see FIG. 6) from the planar reflecting surface 7 can enter the projection lens 6. It may be what is provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is an optical path explanatory view of the direct light from the semiconductor type light source which shows Example 1 of the vehicle lamp concerning this invention. Similarly, it is a disassembled perspective view of a principal part component. Similarly, it is explanatory drawing which shows the action principle of a plane reflective surface. Similarly, it is a longitudinal cross-sectional view which shows the state which the semiconductor type light source lighted and emitted. Similarly, it is a perspective view which shows a 1st reflector and a light-shielding member. It is optical path explanatory drawing of the reflected light from the 1st reflective surface which shows Example 2 of the vehicle lamp concerning this invention, and the reflected light from a 2nd reflective surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,100 Vehicle lamp 2 1st reflector (main reflector)
3 Second reflector (shade / reflector, sub-reflector)
4 Semiconductor light source (LED)
DESCRIPTION OF SYMBOLS 5 Shade 6 Projection lens 7 Planar reflective surface 8 Heat sink member 9 1st reflective surface 10 Opening part 11 2nd reflective surface 13 Light transmission member 14 Edge 15 Fin 16 Holder member 17 Ring member 20 Convex fitting part (positioning part)
21 Recessed fitting part (positioning part)
25 Screw holes (or through holes)
26 Screw holes (or through holes)
27 Screw hole 28 Light-shielding member 29 Light-shielding member B Screw screwing direction F1 First focal point of first reflective surface F2 Second focal point of first reflective surface FL1 Lens focal point FL2 Pseudo-lens focal point Z1-Z1 Lens optical axis Z2-Z2 First Optical axis of reflecting surface Z3-Z3 Pseudo lens optical axis FF Front focus W Horizontal depth L1 Parallel light L2 Reflected light from planar reflecting surface L3 Light from semiconductor light source L4 Reflected light from first reflecting surface L5 Projection Projection light from the lens L6 Direct light from the semiconductor-type light source that enters the projection lens L7 Direct light from the semiconductor-type light source that exits the projection lens L8 Direct light from the semiconductor-type light source that does not enter the projection lens L9 Incident to the projection lens Reflected light from the second reflecting surface L10 Reflected light from the second reflecting surface exiting the projection lens L11 Projecting lens Reflected light from the second reflecting surface does not enter

Claims (6)

In a projector-type vehicular lamp that uses a semiconductor-type light source as a light source,
A reflector having an ellipse or a reflecting surface based on an ellipse;
The semiconductor-type light source disposed so that the light emitting unit is positioned at or near the first focal point of the reflecting surface;
A projection lens for projecting a predetermined light distribution pattern in a predetermined direction with the lens optical axis being horizontal or substantially horizontal;
A plane reflecting surface which is arranged between the projection lens and the lens focal point of the projection lens so as to intersect the lens optical axis and reflects a predetermined light distribution pattern toward the projection lens;
With
The lens focal point exists as a pseudo lens focal point at a position symmetrical to the planar reflective surface by the planar reflective surface, and the pseudo lens focal point is located at or near the second focal point of the reflective surface,
The lens optical axis exists as a pseudo lens optical axis orthogonal to the lens optical axis by the plane reflecting surface, and the pseudo lens optical axis coincides with or substantially coincides with the optical axis of the reflecting surface,
Between the semiconductor-type light source and the projection lens, a light shielding member that blocks direct light from the semiconductor-type light source from entering the projection lens is disposed.
A vehicular lamp characterized by the above.   The light shielding member blocks direct light from the semiconductor-type light source from entering the projection lens from the projection lens side to the plane reflecting surface side, and direct light from the semiconductor-type light source reflects the plane reflection. The vehicular lamp according to claim 1, wherein the vehicular lamp is provided in a range where the light can enter the surface.   The light shielding member blocks direct light from the semiconductor-type light source from entering the projection lens from the projection lens side to the planar reflection surface side, and reflected light from the reflection surface is the planar reflection surface. 2. The vehicular lamp according to claim 1, wherein the vehicular lamp is provided in a range in which reflected light from the planar reflecting surface can enter the projection lens. The semiconductor-type light source is in contact with the heat sink member so that the substrate surface of the semiconductor-type light source is vertical or substantially vertical,
The heat sink member is provided vertically or almost vertically,
The vehicular lamp according to any one of claims 1 to 3. The reflective surface is a first reflective surface,
A portion of the reflected light that is disposed between the second focal point of the first reflecting surface or the vicinity thereof and the semiconductor-type light source and is emitted from the semiconductor-type light source and reflected by the first reflecting surface is cut off. And a shade that forms a predetermined light distribution pattern having a cut-off line with the remaining reflected light,
The shade has a second reflecting surface that forms a predetermined auxiliary light distribution pattern by reflecting the reflected light cut off by the shade and forming a plane that is substantially or substantially flat along the optical axis of the first reflecting surface. Provided,
The vehicular lamp according to any one of claims 1 to 4, wherein the vehicular lamp is provided.   The light shielding member shields direct light from the semiconductor light source and reflected light from the second reflective surface from entering the projection lens from the projection lens side to the planar reflective surface side, and Reflected light from one reflecting surface and reflected light from the second reflecting surface in the previous period can be incident on the planar reflecting surface and reflected light from the planar reflecting surface can be incident on the projection lens. The vehicular lamp according to claim 5, wherein the vehicular lamp is provided.

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