JP6248525B2 - Lighting fixtures for vehicles - Google Patents

Description

  The present invention relates to a vehicular illumination lamp, and in particular, vehicular illumination such as a lens direct-light type headlamp or fog lamp that makes light from a semiconductor light source incident on a lens and irradiates the front of the vehicle or the like through the lens. It relates to lighting equipment.

  2. Description of the Related Art Conventionally, there is a lens direct illumination type vehicular illumination lamp in which light from a semiconductor-type light source is incident on a lens and can be irradiated to the front of the vehicle through the lens (see, for example, Patent Document 1).

  The vehicular illumination lamp described in Patent Document 1 is arranged with a projection lens arranged on an optical axis extending in the vehicle front-rear direction and a light emitting surface facing rearward of the rear focus of the projection lens. A light emitting element, a reflector arranged to cover the light emitting element from above, a reflector that reflects light from the light emitting element toward the projection lens, and an upper edge passing through the vicinity of the rear focal point of the projection lens. And a light distribution for low beam (passing).

  The projection lens includes a first projection lens and a second projection lens in which the upper and lower sides of the aspherical lens having a circular outer shape are cut off in the horizontal direction when the vehicular illumination lamp is viewed from the front. The first projection lens and the second projection lens are arranged vertically so that the optical axes extending in the front-rear direction of the respective projection lenses coincide with each other when viewed from above.

  On the other hand, the reflector has a first reflector part that reflects light from the light emitting element toward the first projection lens part and a second reflector part that reflects light toward the second projection lens part.

  Then, the light distribution state of this conventional vehicular illumination lamp will be described using the screen isoluminance curve shown in FIG. 5 as follows.

  FIG. 5 is a simplified diagram of a low beam light distribution pattern PL formed on a virtual vertical screen arranged in front of a vehicle by light emitted forward from a conventional vehicle lighting device by computer simulation. It is. FIG. 5A shows an isoluminous curve of the basic light distribution pattern P0 for condensing having a cut-off line CL irradiated forward through the first projection lens unit, and FIG. 3 shows an isoluminous curve of an additional light distribution pattern P1 for diffusion irradiated forward through a projection lens unit.

  FIG. 5C is an isoluminance curve obtained by synthesizing the basic light distribution pattern P0 of FIG. 5A and the additional light distribution pattern P1 of FIG. 5B, and shows a low beam light distribution pattern PL. . In these isoluminous curves, the central isoluminous curve indicates a high luminous intensity zone, and the outer isoluminous curve indicates a low luminous intensity zone. Further, in FIG. 5, “HH” indicates a horizontal line on the left and right of the screen, and “VV” indicates a vertical line on the top and bottom of the screen. In FIG. 5, the right side of the page is the own lane side, and the left side is the opposite lane side.

  The basic light distribution pattern P0 shown in FIG. 5A is reflected by the light distribution pattern formed by the basic optical system, that is, the reflection surface of the first reflector unit, and then passes through the first projection lens unit. It is the light distribution pattern formed with the light from the light emitting element irradiated to the front. The basic light distribution pattern P0 is a light distribution pattern that forms the basic shape of the low beam light distribution pattern PL, and the cut-off line CL is formed in the basic light distribution pattern P0.

  Further, the cut-off line CL extends in the horizontal direction with the left and right steps different from each other with the vertical line “V-V” as a boundary. More specifically, in FIGS. 5A and 5C, the right side of the drawing is the opposite lane side, and the cut-off line CL1 on the opposite lane side is formed so as to extend in the horizontal direction from the vertical line “V-V”. ing. On the other hand, the left side is the own lane side, and the cut-off line CL2 on the own lane side rises higher than the cut-off line CL1 on the opposite lane side, that is, rises diagonally once from the vertical line “V-V” and then extends in the horizontal direction. It is formed in this way.

  FIG. 5B shows an additional light distribution pattern P1 for diffusion reflected from the second reflector unit and emitted from the second projection lens. The additional light distribution pattern P1 is a light distribution pattern formed by light from the light emitting element irradiated forward through the second projection lens after being reflected by the reflection surface of the second reflector unit. In the horizontal direction, the reflected light from the second reflector part enters the second projection lens part at a right and left spread angle of the reflected light, and exits forward from the second projection lens part at the same angle as the incident angle at this time. Will be.

  Incidentally, as shown in FIGS. 5A and 5C, the basic light distribution pattern P0 is provided with a hot zone (high luminous intensity band) HZ at the center of the left and right. In the conventional vehicular illumination lamp, the optical axis of the first reflector part, the optical axis of the second reflector part, and the light emitting element are provided at positions on the vertical line “V-V”. Further, a shade that forms a cut-off line CL is disposed between the first reflector and the first projection lens. As described above, when the optical axis of the first reflector portion and the light emitting element are provided at a position on the vertical line “V-V”, as can be seen from FIGS. 5A and 5C, the first reflector portion. Part of the light incident on the hot zone HZ is cut by the shade.

JP 2011-243474 A

  As described above, in the conventional vehicular illumination lamp, a part of the light traveling from the first reflector portion toward the hot zone HZ in the basic light distribution pattern is cut by the shade, so that the light from the light source is effectively used. There is a problem that not.

  Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a vehicular illumination lamp that can illuminate by effectively using light from a light source and can improve visibility.

The present invention has been proposed to achieve the above object, and is grasped by the following configuration.
(1) A vehicular illumination lamp that irradiates the front of a vehicle according to the present invention includes a semiconductor-type light source and a plurality of reflector portions that reflect light from the semiconductor-type light source in the vertical direction, and is positioned at the bottom. A reflector having a reflector part and an upper reflector part composed of the reflector part other than the lower reflector part, and the same number of lens parts as the reflector part are provided in the vertical direction, and the reflected light of the lower reflector part is a hot zone centered The lower lens portion positioned at the lowermost portion that irradiates the front of the vehicle as the basic light distribution pattern for condensing and the lower light portion that irradiates the front of the vehicle as the additional light distribution pattern for diffusion. A projection lens having an upper lens portion formed of the lens portion other than the lens portion, and a rear focal point of the lower lens portion, and arranged from the lower reflector portion. A shade that blocks a part of the reflected light toward the lower lens portion, and when the optical axis of the lower reflector portion is the first optical axis, the first optical axis is self-viewed when viewed from above. The first optical axis and the optical axis of the upper reflector section are directed in different directions.

(2) In the configuration of (1) above, each of the reflector portions is formed by an elliptical free-form surface having a first focus and a second focus, and the first focus is provided at the position of the semiconductor-type light source. The second focal point is provided at a rear focal position of the lens unit corresponding to each reflector unit.

(3) In the configuration of the above (1) or (2), the lower lens unit is positioned at the center of the lens of the lower lens unit closer to the own lane than the semiconductor light source when viewed from the front. Has been placed.

(4) In the configurations of (1) to (3) above, the upper lens portion is disposed so that the lens central portion of the lens portion is located on the opposite lane side of the semiconductor-type light source when viewed from the front. At least one of the lens portions.

(5) In the configurations of (1) to (4) above, the lower lens portion is disposed in front of the vehicle relative to the upper lens portion.

(6) In the configurations of (1) to (5), a part of the upper and lower sides of the aspherical lens having an aspherical shape having a circular outer shape is cut off in the horizontal direction. The upper ablation position is a position slightly away from the lens optical axis of the aspheric lens by α, and the lower ablation position is less than the lens optical axis of the aspheric lens. Is also a position separated by β downward, and the relationship between α and β satisfies α <β.

(7) In the configurations of (1) to (6), the upper reflector portion is composed of one upper reflector portion, and the upper lens portion is composed of one upper lens portion.

ADVANTAGE OF THE INVENTION According to this invention, the illumination lamp for vehicles which can illuminate using the light from a light source effectively, and can improve visibility can be provided.
In addition, according to the present invention, it is possible to provide a vehicular illumination lamp having a novel appearance.

It is a front view of a lamp unit showing an embodiment of a vehicular illumination lamp according to the present invention. It is explanatory drawing (top view corresponding to the AA line in FIG. 1) which shows the optical path in the left-right direction of a lamp unit same as the above. It is explanatory drawing (side view corresponding to the BB line in FIG. 1) which shows the optical path in the up-down direction of a lamp unit same as the above. (a) It is explanatory drawing of the luminous intensity curve of a screen which shows the basic light distribution pattern irradiated ahead through the lower lens part of the lamp unit of this embodiment. (b) It is explanatory drawing of the luminous intensity curve of a screen which shows the additional light distribution pattern irradiated ahead through the upper lens part of the lamp unit of this embodiment. (c) It is explanatory drawing of the luminous intensity curve of a screen which shows the light distribution pattern for low beams which synthesize | combined the basic light distribution pattern and additional light distribution pattern of the lamp unit of this embodiment. (a) It is explanatory drawing of the luminous intensity curve of a screen which shows the basic light distribution pattern irradiated ahead through the lower lens part of the conventional vehicle lighting device. (b) It is explanatory drawing of the luminous intensity curve of a screen which shows the additional light distribution pattern irradiated ahead through the upper lens part of the conventional vehicle lighting device. (c) It is explanatory drawing of the luminous intensity curve of a screen which shows the light distribution pattern for low beams which synthesize | combined the basic light distribution pattern and the additional light distribution pattern of the conventional vehicle lighting device.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. In the following description, front, rear, upper, lower, left, and right are front, rear, upper, lower, left, and right when the vehicle illumination lamp of this embodiment is mounted on a vehicle.

  The vehicle illumination lamp of the present embodiment shown in FIGS. 1 to 4 is configured as a projector-type lamp unit 11 that performs light irradiation for forming a low-beam light distribution pattern, for example, as a part of a headlamp. It is used in a state supported by a lamp body (not shown).

  As shown in FIG. 3, the lamp unit 11 reflects a projection lens 12, a semiconductor-type light source 13 disposed behind the projection lens 12, and light from the semiconductor-type light source 13 toward the projection lens 12. The reflector 14 mainly includes a shade 15 that forms a cut-off line of the low beam light distribution pattern, and a lens holder 16.

In FIG. 1, the flange portion 17 provided on the projection lens 12 shown in FIGS. 2 and 3, and its flange so that the relationship among the projection lens 12, the semiconductor-type light source 13, the reflector 14, the shade 15, and the like are easy to see. The lens holder 16 attached to the portion 17 is not shown.
2 and 3, one end of the lens holder 16 is attached to the flange portion 17 of the projection lens 12, and the other end of the lens holder 16 is attached to the reflector 14 or the flange portion 18 of the heat sink. Yes.
As described above, the projection lens 12 is disposed at a predetermined position by being held by the lens holder 16.

(Semiconductor light source)
The semiconductor-type light source 13 is a self-luminous semiconductor-type light source such as LED, OEL, or OLED (organic EL). The semiconductor-type light source 13 is composed of a light emitting chip (LED chip) and a substrate on which the light emitting chip is mounted, and a connector for supplying current from a power source (battery) to the light emitting chip is also provided on the substrate. The reference line Z0 shown in FIG. 2 is a straight line that passes through the center of the light emitting surface 13a of the semiconductor light source 13 and extends straight in the vehicle longitudinal direction. Further, as shown in FIG. 3, the light emitting surface 13a of the semiconductor-type light source 13 is arranged facing upward.

(Projection lens)
The projection lens 12 is composed of a light transmissive member such as acrylic or polycarbonate. As shown in FIGS. 1 and 3, the projection lens 12 includes an upper lens unit LU and a lower lens unit LD. In this example, the case of one upper lens unit LU is shown, but a plurality of upper lens units LU may be provided in the vertical direction, and an upper lens unit composed of a plurality of lens units may be used. As will be described in detail later, the lower lens portion LD is a lens portion that irradiates the light of the condensing basic light distribution pattern P0 having the cut-off line CL shown in FIG. The lens unit LU is a lens unit that irradiates the front side of the vehicle with the additional light distribution pattern P1 for diffusion shown in FIG.

  As shown in FIGS. 1 and 3, the lower lens portion LD and the upper lens portion LU are both cut off in the horizontal direction on the upper and lower sides of an aspheric lens having an aspheric shape having a circular outer shape. It has a shape.

  More specifically, it has the shape of an aspheric lateral lens that is elongated in the left-right direction when viewed from the front of the vehicular illuminator in FIG. 1, and in a side view of the vehicular illuminator shown in FIG. As seen, in the aspherical lens that was symmetrical before the upper and lower sides were cut in the horizontal direction, a position that was cut away by α slightly above the lens optical axes Z1 and Z2 in the horizontal direction Is the upper end of the lower lens portion LD and the upper lens portion LU, and the position where the position separated by β below the lens optical axes Z1 and Z2 is cut horizontally is the lower lens portion LD and the upper lens portion. This is the lower end of the part LU, and the relationship between α and β is α <β.

  In the above description, the expression “resection” is used for simplification of description. However, it is necessary to cut each aspherical lens and individually manufacture the lower lens portion LD and the upper lens portion LU. Does not mean. It merely explains that the shape is such a shape. Of course, the aspherical lenses may be cut and processed separately and stacked one on top of the other, but a mold that can integrally mold the lower lens portion LD and the upper lens portion LU is manufactured and injected. You may produce integrally by means, such as shaping | molding.

  As shown in FIG. 1, the lower lens portion LD and the upper lens portion LU are arranged such that the upper lens portion LU is stacked on the upper end surface of the lower lens portion LD. Further, the lower lens portion LD is arranged so that the lens center portion of the lower lens portion LD is positioned on the right side (own lane side) of the semiconductor light source 13 when viewed from the front of the vehicular illumination lamp shown in FIG. The upper lens unit LU is arranged so that the center of the lens of the upper lens unit LU is located on the left side (opposite lane side) of the semiconductor light source 13. As will be described later, an arrangement in which the lens center portions of the lower lens portion LD and the upper lens portion LU coincide with the semiconductor light source 13 when viewed from the front of the vehicular illumination lamp, that is, the lower lens portion LD and The upper lens unit LU may be arranged so that it is not displaced on the own lane side or the opposite lane side.

  Further, as shown in FIG. 3, the lower lens portion LD is disposed so as to be positioned in front of the vehicle with respect to the upper lens portion LU. The lower lens portion LD and the upper lens portion LU may be disposed at the same position in the vehicle front-rear direction, that is, not displaced in the front-rear direction.

(Reflector)
As shown in FIG. 3, the reflector 14 is disposed so as to cover the semiconductor light source 13 from the upper side in a substantially semi-dome shape, and reflects the light from the semiconductor light source 13 toward the lower lens portion LD. And an upper reflector unit RU that reflects light from the semiconductor light source 13 toward the upper lens unit LU. As described above, when a plurality of upper lens units LU are provided in the vertical direction and an upper lens unit composed of a plurality of lens units is used, a plurality of upper reflector units RU corresponding to the upper lens units are provided in the vertical direction. It is only necessary to provide an upper reflector portion including a plurality of reflector portions.

  The upper reflector unit RU and the lower reflector unit RD are similar to the upper lens unit LU and the lower lens unit LD, as shown in FIG. 1, and the upper reflector unit RU overlaps the lower reflector unit RD, and 2, the optical axis (also referred to as the first optical axis) Z11 of the lower reflector portion RD is directed in a direction inclined to the left side (own lane side) when viewed from the top of the vehicular illumination lamp. On the other hand, the optical axis (also referred to as second optical axis) Z22 of the upper reflector unit RU is formed in a direction inclined toward the opposite lane, and is a top view of the vehicular illumination lamp shown in FIG. , The first optical axis and the second optical axis are in different directions.

  The second optical axis does not need to be formed in a direction inclined toward the other lane, for example, and is a straight line that passes straight through the center of the light emitting surface 13a of the semiconductor light source 13 shown in FIG. It may be parallel to a certain reference line Z0. The inclination of the first optical axis and the second optical axis as described above can be easily realized by forming the shape of the reflector portions RU and RD slightly adjusted. In FIG. 1 to FIG. 3, the orientation of the reflector units RU and RD is shown in order to show the misalignment of the lens units LU and LD and the inclinations of the first and second optical axes of the reflector units RU and RD. Is quite extreme. Actually, the lens portions LU and LD do not need to be arranged so as to be shifted to the own lane side or the opposite lane side so much, and as described above, the second optical axis is parallel to the reference line Z0. Even in such a state, the reflected light of the upper reflector unit RU cannot be made incident on the upper lens unit LU.

  Further, the reflector portions RU and RD will be described in detail. As shown in FIGS. 1 to 3, the upper reflector portion RU and the lower reflector portion RD are arranged in the vicinity where the reflector portions RU and RD overlap with each other. And the lower reflector portion RD are connected to each other, but the upper side of the portion where the semiconductor-type light source 13 is located has a blow-off structure. Therefore, light from the semiconductor-type light source 13 is transmitted to the upper reflector portion RU. Also released. As a result, as shown in FIG. 3, the light emitted from the semiconductor-type light source 13 is reflected in the direction of the first optical axis and the second optical axis by the lower reflector part RD and the upper reflector part RU.

  Further, as shown in FIG. 3, the upper reflector RU and the lower reflector RD are both provided with the first focal point F1 at the position of the semiconductor light source 13, while the second focal point F2 of the lower reflector RD is The second focal point F3 of the upper reflector unit RU is provided at the position of the rear focal point F3 of the upper lens unit LU.

  In other words, the first focal point F1 is such that any reflector part (upper reflector part RU and lower reflector part RD) is provided at the position of the semiconductor light source 13, and the second focal points F2 and F3 are the respective reflectors. The lens unit (upper lens unit LU and lower lens unit LD) corresponding to the unit (upper reflector unit RU and lower reflector unit RD) is provided at the positions of the rear focal points F2 and F3. Such a reflector portion having two focal points can be formed as an elliptical free curved surface, and both the upper reflector portion RU and the lower reflector portion RD are formed as elliptical free curved surfaces.

(shade)
The shade 15 is made of a plate-like member, and as shown in FIG. 3, the upper end edge 15a is disposed in the vicinity of the rear focal point F2 of the lower lens portion LD, and the reflected light traveling from the lower reflector portion RD toward the lower lens portion LD is obtained. A cut-off line CL, which will be described later, is formed by shielding a part.

  FIG. 4 shows a computer simulation of a low beam light distribution pattern PL formed on a virtual vertical screen disposed in front of the vehicle by light irradiated forward from the lamp unit 11 that is a vehicle lighting device of the present embodiment. This is a simplified drawing.

  FIG. 4A is an isoluminous curve showing a basic light distribution pattern P0 for condensing having a cutoff line CL irradiated forward through the lower lens portion LD, and FIG. 4B passes through the upper lens portion LU. 5 shows an isoluminous curve of the additional light distribution pattern P1 for diffusion irradiated forward. FIG. 4C is an isoluminous curve obtained by combining the basic light distribution pattern P0 of FIG. 4A and the additional light distribution pattern P1 of FIG. 4B, and is a low beam light distribution pattern PL. In these isoluminous curves, the central isoluminous curve shows high luminous intensity, and the outer isoluminous curve shows low luminous intensity. In FIG. 4, “HH” indicates a horizontal line on the left and right of the screen, and “VV” indicates a vertical line on the top and bottom of the screen. The right side of FIG. 4 is the own lane side and the left side is the opposite lane. On the side.

  In FIG. 4A, the basic light distribution pattern P0 is formed by light from the semiconductor-type light source 13 that is reflected by the reflection surface of the lower reflector portion RD and then irradiated forward through the lower lens portion LD. Light pattern. The basic light distribution pattern P0 is a light distribution pattern that forms the basic shape of the low beam light distribution pattern PL, and the cut-off line CL formed by the shade 15 is formed in the basic light distribution pattern P0.

  The cut-off line CL shown in FIGS. 4A and 4C extends in the horizontal direction with a difference in left and right steps with a vertical line “V-V” as a boundary. More specifically, the cut-off line CL1 on the opposite lane side to the right of the vertical line “V-V” is formed to extend in the horizontal direction from the vertical line “V-V”. On the other hand, the cut-off line CL2 on the own lane side on the left side of the vertical line “V-V” rises higher than the cut-off line CL1 on the opposite lane side, that is, rises obliquely once from the vertical line “V-V”, and then It is formed so as to extend in the horizontal direction.

  As shown in FIG. 2, the first optical axis Z11 of the lower reflector portion RD of the present embodiment is formed in a direction inclined toward the own lane, but the optical axis of the conventional lower reflector portion is the own lane. It is not formed in the direction inclined to the side. In other words, the optical axis of the conventional lower reflector portion is formed on the reference line Z0 shown in FIG. Therefore, in the conventional case, a part of the high intensity light in the reflected light of the lower reflector part is shielded by the part forming the cut-off line CL1 on the opposite lane side of the shade 15, and the hot zone in the basic light distribution pattern P0. It is not used effectively for the formation of HZ.

  In the present embodiment, as described above, since the first optical axis Z11 of the lower reflector part RD is formed in the direction inclined toward the own lane, the high intensity light in the reflected light of the lower reflector part RD is shaded. Since it goes in a direction that passes through a position slightly offset to the part side that forms the cut-off line CL2 on the own lane 15 of the lane 15, the high-intensity light shielded by the shade part that forms the cut-off line CL1 of the conventional shade 15 is The light can be incident on the lower lens portion without being shielded, and is effectively used to form the hot zone HZ in the basic light distribution pattern P0.

  On the other hand, in FIG. 4B, the additional light distribution pattern P1 is formed by light from the semiconductor-type light source 13 that is reflected forward by the upper lens unit LU after being reflected by the reflecting surface of the upper reflector unit RU. Light distribution pattern. Reflected light from the upper reflector unit RU is incident on the upper lens unit LU at a horizontal spreading angle of the reflected light in the horizontal direction, and is emitted forward from the upper lens unit LU at the same angle as the incident angle at this time. It becomes.

  The lamp unit 11 which is the vehicle lighting device of the present embodiment has the above-described configuration, and the operation and effect will be described below.

  In the present embodiment, the first optical axis Z11 of the lower reflector part RD is not the reference line Z0 shown in FIG. 2 (conventionally, it is an optical axis like the reference line Z0), but is on the own lane side. It is formed diagonally facing. As a result, conventionally, the high-intensity light shielded at the portion of the shade 15 where the cut-off line CL1 is formed is slightly offset toward the side of the shade 15 where the cut-off line CL2 is formed. Is incident on the portion LD. Therefore, the unshielded light is effectively utilized for forming the hot zone HZ in the basic light distribution pattern P0, so that the visibility on the own lane side can be improved.

In FIG. 1 and FIG. 2, the upper lens unit LU and the lower lens unit LD are drawn so as to be greatly displaced in the left-right direction.
Further, the upper reflector part RU and the lower reflector part RD are also drawn so as to be largely deflected in the left-right direction. However, as described above, this is only shown for easy understanding in explaining the state, and actually, the upper lens unit LU and the lower lens unit LD are greatly shifted in the left-right direction. The upper reflector RU and the lower reflector RD need not be deflected so much in the left-right direction.

Accordingly, the overall light distribution state of the screen isoluminance curve is substantially the same as the conventional one.
As described above, the first optical axis Z11 of the lower reflector portion RD is slightly directed toward the cut-off line CL2 side of the shade 15, so that it can enter the lower lens portion LD without being shielded by the shade 15. The high-luminance light component appears slightly to the left of the vertical line “V-V” in FIGS. For this reason, the visibility on the own lane side can be improved as described above while realizing the low beam light distribution pattern PL (see FIG. 4C) similar to the conventional one.

  Note that the inclination of the first optical axis of the lower reflector part RD to reduce the light shielded by the shade 15 to the own lane does not have to be so great, and therefore the own lane is not necessarily required to the lower lens part LD. Even without shifting to the side, it is possible to make light incident on the lower lens portion LD. Therefore, the lower lens portion LD does not necessarily have to be arranged shifted from the own lane side.

  In the present embodiment, as shown in FIG. 2, the upper lens unit LU is arranged to be shifted to the opposite lane side, and the second optical axis Z22 that is the optical axis of the upper reflector unit RU is also inclined to the opposite lane side. Is formed. Since the upper lens unit LU is a lens unit that forms the additional light distribution pattern P1 for diffusion, there is no need to provide a shade, but there is a case where it is desired to provide a shade. In such a case, if the upper lens unit LU is shifted from the lower lens unit LD on the opposite side (that is, the opposite lane side) as in this embodiment, the shade for the lower lens unit LD and the upper When the shade for the lens unit LU is arranged, it is easy to avoid interference between the shades, and therefore the shade for the upper lens unit LU does not get in the way.

  Note that the upper lens unit LU and the upper reflector unit RU may be arranged in the same manner as in the prior art, so it is not always necessary to dispose the upper lens unit LU in the opposite lane side, and the upper reflector is not necessarily provided. The part RU need not be formed in a direction in which the second optical axis is inclined toward the opposite lane.

In the above description, optical effects have been mainly described. However, in the vehicular illumination lamp, the novelty of the design is also important.
As can be seen from the description of this embodiment, the vehicular illumination lamp of the present invention has a plurality of lens portions, and the arrangement of the lens portions can also be adjusted in the left-right and front-rear directions. Therefore, since there is a great degree of freedom in the arrangement of the lens portion, it is possible to design a vehicular illumination lamp having a novel novel design.

  Further, if necessary, a plurality of upper lens units LU are provided in the vertical direction, and an upper lens unit composed of a plurality of lens units is provided, and a plurality of upper reflector units RU corresponding to each of the upper lens units are provided in the vertical direction. As the upper reflector portion composed of the reflector portion, it is possible to design a vehicular illumination lamp having various design features while achieving optically necessary functions.

  In this embodiment, one optical system is formed by one upper lens unit LU and one upper reflector unit RU, and the additional light distribution pattern P1 for diffusion is formed by the one optical system. However, a plurality of upper lens portions LU are provided in the vertical direction to form an upper lens portion composed of a plurality of lens portions, and a plurality of upper reflector portions RU corresponding to each of the upper lens portions are provided in the vertical direction to comprise a plurality of reflector portions. If the upper reflector portion is used and the same additional light distribution pattern P1 is obtained by a plurality of optical systems, the degree of freedom in design of each lens portion and the like increases as the number of optical systems increases. As a result, it is possible to design the lamp unit 11 that is thinned to the limit.

  Note that the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within a scope in which the object of the present invention can be achieved are included in the present invention.

DESCRIPTION OF SYMBOLS 11 Lamp unit 12 Projection lens 13 Semiconductor type light source 13a Light emission surface 14 Reflector 15 Shade 16 Lens holder 17 Flange part 18 Flange part CL Cut-off line CL1 Opposite lane side cut-off line CL2 Own lane side cut-off line F1 First focus position F2, F3 First Two focal positions LU Upper lens part LD Lower lens part RU Upper reflector part RD Lower reflector part P0 Basic light distribution pattern P1 Additional light distribution pattern Z0 Reference lines Z1 and Z2 extending in the vehicle longitudinal direction Lens optical axis Z11 Optical axis of the lower reflector part (First optical axis)
Z22 Upper reflector optical axis (second optical axis)
VV Vertical line HH Horizontal line HZ Hot zone

Claims (6)

An illumination lamp for a vehicle that illuminates the front of the vehicle,
A semiconductor light source;
A reflector having a plurality of reflector portions that reflect light from the semiconductor-type light source in the vertical direction, a lower reflector portion that is positioned at the bottom and an upper reflector portion that includes the reflector portions other than the lower reflector portion;
The same number of lens parts as the reflector parts are provided in the vertical direction, and the lower part located at the lowermost part that irradiates the reflected light of the lower reflector part to the front of the vehicle as a basic light distribution pattern for condensing having a hot zone in the center. A projection lens having a lens unit and an upper lens unit composed of the lens unit other than the lower lens unit that irradiates the front of the vehicle with the reflected light of the upper reflector unit as an additional light distribution pattern for diffusion;
A shade that is disposed in the vicinity of the rear focal point of the lower lens portion and shields a part of reflected light from the lower reflector portion toward the lower lens portion;
When the optical axis of the lower reflector portion is the first optical axis, the first optical axis is oriented in a direction inclined toward the own lane when viewed from above, and the first optical axis and the upper optical axis The optical axis of the reflector part is in a different direction ,
Each of the reflector portions is formed of an elliptical free-form surface having a first focal point and a second focal point, both of the first focal points are provided at the position of the semiconductor light source, and the second focal point is the respective reflector. A vehicular illumination lamp characterized by being provided at a rear focal position of the lens portion corresponding to the portion . The lower lens portion, as viewed in a front view, than the semiconductor-type light source according to claim 1, characterized in that the lens central portion of the lower lens portion to the own lane side is arranged to be positioned Vehicle lighting fixtures. The upper lens unit has at least one lens unit arranged so that a lens central part of the lens unit is positioned on the opposite lane side of the semiconductor-type light source when viewed from the front. The vehicular illumination lamp according to claim 1 or 2 . The lower lens portion, said upper lens portion vehicular illumination lamp according to any one of claims 1 3, characterized in that it is arranged to be positioned in front of the vehicle than. The lens portion has a shape such that a part of the upper and lower sides of an aspherical lens having an aspherical shape each having a circular outer shape is cut in the horizontal direction, and the upper cutting position is the non-cutting position. A position slightly apart from the lens optical axis of the spherical lens by α, and the lower cutting position is a position separated by β below the lens optical axis of the aspheric lens, α and β vehicular illumination lamp according to claim 1, any one of 4 relationship is characterized in that it satisfies the alpha <beta. 6. The vehicular illumination lamp according to any one of claims 1 to 5 , wherein the upper reflector portion is composed of one upper reflector portion, and the upper lens portion is composed of one upper lens portion.

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