JP2018098105A - Vehicular headlamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular headlamp including a plurality of light sources configured to emit light in mutually different directions.SOLUTION: A vehicular headlamp includes: a first light source 42 configured to emit first light; a second light source 52 arranged below the first light source 42, and configured to emit second light; a projection lens 15 arranged ahead of the first light source 42 and the second light source 52, and configured to transmit the first light and the second light; and a shade 35 arranged between the first light source 42 and the second light source 52, and configured to shade at least part of the first light. The shade 35 has a first concave reflection surface 35a extending from the first light source 42 side toward the projection lens 15 and configured to reflect part of the first light forward, and a second concave reflection surface 35b extending from the second light source 52 side toward the projection lens 15 and configured to reflect part of the second light forward. A normal line of an emission surface 42f of the first light source 42 faces forward and obliquely downward, and a normal line of an emission surface 52f of the second light source 52 faces forward and obliquely upward.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle headlamp.

  2. Description of the Related Art As vehicle headlamps typified by automobile headlights, in addition to a low beam light source that illuminates the front at night, a high beam light source that illuminates far away from the low beam is known. The light from the high beam light source includes light that is irradiated upward from the low beam. A vehicle headlamp in which these light sources are provided in one lamp unit is known.

  For example, in Patent Document 1 below, a first light emitting element that emits light upward, a first reflector that is arranged to cover the first light emitting element from above, and a second light emitting element that emits light downward A vehicle comprising: a second reflector disposed so as to cover the second light emitting element from below; and a projection lens through which light emitted from the first light emitting element and light emitted from the second light emitting element are transmitted. An illumination lamp is disclosed.

JP 2006-164735 A

  In the vehicular illumination lamp disclosed in Patent Document 1, the light emitted from the first light emitting element is emitted upward with respect to the optical axis of the projection lens, and the light emitted from the second light emitting element is the projection lens. Is emitted downward with respect to the optical axis. The light emitted from the first light emitting element is reflected forward by the first reflector so that the light emitted in this way enters a projection lens disposed in front of the first light emitting element and the second light emitting element. At the same time, it is necessary to reflect light emitted from the second light emitting element forward by the second reflector.

  In the vehicular illumination lamp disclosed in Patent Document 1, in order to make the light emitted from the first light emitting element and the light emitted from the second light emitting element efficiently enter the projection lens, the first reflector and It is preferable that the second reflectors are provided so as to largely protrude forward. However, when the first reflector and the second reflector are increased in size as described above, the lamp is easily increased in size.

  Accordingly, an object of the present invention is to provide a vehicular headlamp that includes a plurality of light sources that emit light in different directions from each other and that can be prevented from being enlarged while effectively using light from these light sources. To do.

  In order to solve the above problems, a vehicle headlamp according to the present invention includes a first light source that emits first light, and a second light source that is disposed below the first light source and emits second light. A projection lens disposed in front of the first light source and the second light source and transmitting the first light and the second light; and disposed between the first light source and the second light source; A shade that blocks a part of the first light, the shade extending from the first light source side toward the projection lens, and reflecting a part of the first light forward. A concave first reflective surface, and a concave second reflective surface extending from the second light source side toward the projection lens and reflecting a part of the second light forward, The normal line of the exit surface of the first light source is directed obliquely downward and the normal line of the exit surface of the second light source is directed obliquely upward and forward.

  In the vehicle headlamp described above, since the normal line of the emission surface of the first light source is directed obliquely forward and downward, a part of the first light is directly incident on the projection lens and the other one of the first light is emitted. The portion can be reflected by a first reflecting surface disposed below the first light source and incident on the projection lens. For this reason, the first light can be used effectively. Further, since the normal line of the emission surface of the second light source is directed obliquely upward, a part of the second light is directly incident on the projection lens and another part of the second light is transmitted to the second light source. It can be reflected by the second reflecting surface disposed above and incident on the projection lens. For this reason, the second light can be used effectively. Furthermore, since the first reflection surface and the second reflection surface are formed on one surface and the other surface of the shade, the first reflection surface and the second reflection surface can be formed with one member. In addition, since it is assumed that a part of the first light and a part of the second light are directly incident on the projection lens, it is necessary to cause the first reflecting surface and the second reflecting surface to largely protrude forward. Absent. As described above, in the vehicle headlamp, the first light and the second light can be efficiently incident on the projection lens without using a large reflector. Therefore, the vehicle headlamp includes a plurality of light sources that emit light in different directions, and the size of the vehicle headlamp can be suppressed while effectively using the light from these light sources.

  The focal point of the projection lens is preferably formed between the front end of the shade and the projection lens.

  Since the shade shields part of the first light as described above, the front end of the shade can form a light distribution cut line by the first light. In addition, as described above, the normal line of the emission surface of the first light source is directed obliquely downward and the normal line of the emission surface of the second light source is directed obliquely upward, so that the first light and the second light are shaded. The front end of the shade tends to be bright. Here, when the focal point of the projection lens is formed between the front end of the shade and the projection lens, that is, in the vicinity of the front end of the shade, the vicinity of the cut line can be brightened.

  In the vertical cross section, it is preferable that the first light source and the second light source are arranged at positions asymmetric with respect to the optical axis of the projection lens.

  Further, it is preferable that at least one of the first light reflected by the first reflecting surface and the second light reflected by the second reflecting surface is reflected forward with a divergence angle being reduced. .

  By reducing the divergence angle of the first light reflected forward by the first reflecting surface, the first light can be collected in a predetermined range and then incident on the projection lens. For this reason, the predetermined range of the light distribution of the first light can be made relatively brighter than the other ranges. For example, the vicinity of the cut line can be brightened. In addition, since the divergence angle of the second light reflected forward by the second reflecting surface is reduced, the second light can be incident on the projection lens after being collected in a predetermined range. For this reason, the predetermined range of the light distribution of the second light can be made relatively brighter than the other ranges. For example, a portion where the light distribution of the first light and the light distribution of the second light overlap can be brightened.

  In addition, it is preferable to further include a third reflecting surface that covers the upper side of the first light source and a fourth reflecting surface that covers the lower side of the second light source.

  By providing the third reflection surface and the fourth reflection surface as described above, the first light and the second light can be used more effectively. Note that most of the first light emitted from the first light source is incident on the projection lens directly or after being reflected by the first reflecting surface as described above. Since the third reflecting surface is not assumed to reflect all of the light emitted from the light source like the reflector described in Patent Document 1, it is described in Patent Document 1. It can be made smaller than the reflector. In addition, since most of the second light emitted from the second light source is reflected directly or reflected by the second reflecting surface as described above and enters the projection lens, the fourth reflecting surface is also made smaller like the third reflecting surface. be able to.

  Further, it is preferable that at least one of the first light reflected by the third reflecting surface and the second light reflected by the fourth reflecting surface is diverged.

  By causing the first light reflected by the third reflecting surface to diverge, the first light can be irradiated over a wide range. Similarly, the second light reflected by the fourth reflecting surface can be diverged to irradiate the second light over a wide range.

  Moreover, it is preferable that at least one of the first light source and the second light source includes an LED array.

  When the first light source and the second light source are LED arrays, the light distribution of the first light source and the light distribution of the second light source can be controlled by controlling the lighting pattern of each LED included in the LED array. It becomes easy.

  Moreover, it is preferable that the front end of the shade is gradually recessed backward from the left and right ends toward the center.

  When the front end of the shade has the above shape, the cut line can be easily formed into a desired shape.

  As described above, according to the present invention, there is provided a vehicular headlamp that includes a plurality of light sources that emit light in different directions and that can suppress the increase in size while effectively using light from these light sources. Is done.

It is a figure which shows the lamp unit which concerns on embodiment of this invention, and the housing | casing which accommodates the said lamp unit. It is a perspective view of the lamp unit shown in FIG. It is a disassembled perspective view of the lamp unit shown in FIG. It is sectional drawing of the perpendicular direction of the lamp unit shown in FIG. It is a front view of the reflector unit, the 1st light source, and the 2nd light source which are shown in FIG. FIG. 5 is a diagram schematically showing an example of an optical path of light emitted from the first light source and the second light source by enlarging a part of FIG. 4. FIG. 7A is a diagram showing the light distribution of the low beam, FIG. 7B is a diagram showing the light distribution of the high beam, and FIG. 7C is a diagram showing the light distribution of the daytime illumination.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the vehicle headlamp which concerns on this invention is illustrated with an accompanying drawing. The embodiments exemplified below are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. The present invention can be modified and improved from the following embodiments without departing from the spirit of the present invention.

  The vehicle headlamps are generally provided in the left and right directions in front of the vehicle, and the left and right vehicle headlamps are generally symmetrical in the left and right directions. Therefore, in this embodiment, one vehicle headlamp will be described.

  FIG. 1 is a diagram illustrating a lamp unit according to the present embodiment and a housing that houses the lamp unit. In addition, in FIG. 1, the side view of a lamp unit and sectional drawing of a housing | casing are shown.

  As shown in FIG. 1, the vehicle headlamp 1 of the present embodiment includes a housing 10 and a lamp unit LU accommodated in the housing 10.

  The housing 10 includes a lamp housing 11, a front cover 12, and a back cover 13 as main components. The front of the lamp housing 11 is open, and a light-transmitting front cover 12 is fixed to the lamp housing 11 so as to close the opening. In addition, an opening smaller than the front is formed at the rear of the lamp housing 11, and the back cover 13 is fixed to the lamp housing 11 so as to close the opening.

  A space formed by the lamp housing 11, the front cover 12 that closes the front opening of the lamp housing 11, and the back cover 13 that closes the rear opening of the lamp housing 11 is a lamp chamber LR. A lamp unit LU is accommodated therein.

  FIG. 2 is a perspective view of the lamp unit shown in FIG. FIG. 3 is an exploded perspective view of the lamp unit LU shown in FIG.

  2 and 3, the lamp unit LU mainly includes the projection lens 15, the lens holder 20, the reflector unit 30, the first light source unit 40, the second light source unit 50, the third light source unit 60, and the cooling unit 70. As a major component.

  The cooling unit 70 includes a heat sink 71 and a cooling fan 75 as main components. The heat sink 71 includes a first base portion 72, a second base portion 73, and heat radiating fins 74. The first base portion 72 is a plate-like body that extends obliquely upward and to the left and right, and the second base portion 73 is a plate-like body that extends obliquely downward and to the left and right from the lower end of the first base portion 72. The heat radiation fins 74 are formed on the back surfaces of the first base portion 72 and the second base portion 73. The cooling fan 75 is provided on the back side of the radiating fins 74.

  The first light source unit 40 includes a first substrate 41, a first light source 42, and a first connector 43 as main components. The first substrate 41 is a plate-like body and is made of, for example, metal. The 1st light source 42 is arrange | positioned on the 1st board | substrate 41, and radiate | emits 1st light used as a low beam. The first light source 42 includes a plurality of light sources arranged in parallel. The first light source 42 of the present embodiment is an LED array composed of a plurality of LEDs arranged in parallel. By controlling the lighting pattern of each LED included in the LED array, the light distribution of the first light emitted from the first light source 42 can be controlled. The lighting pattern of the first light source 42 is controlled by inputting an electrical signal to a light emission control circuit (not shown) via a first connector 43 provided on the first substrate 41.

  Since the first substrate 41 is overlapped and fixed on the front surface of the first base portion 72 of the cooling unit 70, the surface of the first substrate 41 is substantially parallel to the front surface of the first base portion 72. As described above, since the first base portion 72 extends obliquely upward in the front direction, the surface of the first substrate 41 also extends obliquely upward in the forward direction. In addition, the emission surface of the first light source 42 fixed to the first substrate 41 is substantially parallel to the surface of the first substrate 41. Therefore, the normal line of the emission surface of the first light source 42 faces forward and obliquely downward.

  The second light source unit 50 includes a second substrate 51, a second light source 52, and a second connector 53 as main components. The second substrate 51 is a plate-like body and is made of, for example, metal. The 2nd light source 52 is arrange | positioned on the 2nd board | substrate 51, and radiate | emits the 2nd light used as a high beam. The second light source 52 includes a plurality of light sources arranged in parallel. The second light source 52 of the present embodiment is an LED array composed of a plurality of LEDs arranged in parallel. By controlling the lighting pattern of each LED included in the LED array, the light distribution of the second light emitted from the second light source 52 can be controlled. The lighting pattern of the second light source 52 is controlled by inputting an electrical signal to a light emission control circuit (not shown) via a second connector 53 provided on the second substrate 51.

  Since the second substrate 51 is overlapped and fixed on the front surface of the second base portion 73 of the cooling unit 70, the surface of the second substrate 51 is substantially parallel to the front surface of the second base portion 73. As described above, since the second base portion 73 extends obliquely forward and downward, the surface of the second substrate 51 also extends obliquely downward and forward. In addition, the emission surface of the second light source 52 fixed to the second substrate 51 is substantially parallel to the surface of the second substrate 51. Therefore, the normal line of the emission surface of the second light source 52 faces forward and obliquely downward.

  As described above, the first light source 42 is fixed to the first base portion 72, and the second light source 52 is fixed to the second base portion 73, so that the second light source 52 is disposed below the first light source 42. . In the vertical cross section, the first light source 42 and the second light source 52 are arranged at positions asymmetric with respect to the optical axis of the projection lens 15. In addition, as described above, the normal line of the emission surface of the first light source 42 faces obliquely downward in the front, and the normal line of the emission surface of the second light source 52 faces obliquely downward in the forward direction. And the direction in which the second light is emitted from the second light source 52 intersect each other.

  The third light source unit 60 includes a third substrate 61, a third light source 62, and a third connector 63 as main components. The third substrate 61 is a plate-like body and is made of, for example, metal. The third light source 62 is disposed on the third substrate 61 and emits third light in conjunction with at least one of the steering operation of the vehicle and the operation of the direction indicator. For example, the amount of the third light is adjusted according to the steering angle of the steering. The third light source 62 of the present embodiment is an LED. The third substrate 61 is fixed to the side of the heat sink 71, and the third light is emitted from the third light source 62 in the lateral direction. Specifically, the optical axis of the projection lens 15 and the normal line of the emission surface 62f of the third light source 62 are orthogonal to each other when viewed from above, and the normal line of the emission surface 62f of the third light source 62 is It does not pass through the projection lens 15. The third connector 63 is provided on the third substrate 61, and the light emission of the third light source 62 is controlled by an electrical signal input to a light emission control circuit (not shown) via the third connector 63.

  4 is a vertical sectional view of the lamp unit LU shown in FIG. FIG. 5 is a front view of the reflector unit 30, the first light source 42, and the second light source 52 shown in FIG.

  The reflector unit 30 includes a shade 35, a reflector 31 for the first light source 42, a first side reflector 31a for the first light source 42, a second side reflector 31b for the first light source 42, a reflector 32 for the second light source 52, A first side reflector 32a for the second light source 52 and a second side reflector 32b for the second light source 52 are included as main components.

  The shade 35 is disposed between the first light source 42 and the second light source 52 and shields a part of the first light. The shade 35 has a first reflecting surface 35a on the upper surface and a second reflecting surface 35b on the lower surface. The first reflecting surface 35a is a concave reflecting surface that extends from the first light source 42 side toward the projection lens 15 and reflects part of the first light forward. The second reflecting surface 35b is a concave reflecting surface that extends from the second light source 52 side toward the projection lens 15 and reflects part of the second light forward. The front end 35c of the shade 35 has a shape that matches a cut line described later, and is gradually recessed backward from the left and right ends toward the center.

  The reflector 31 is disposed above the first light source 42 and has a third reflecting surface 31r that covers the top of the first light source 42 on the first light source 42 side. The third reflecting surface 31r and the first reflecting surface 35a of the shade 35 are formed along the parallel direction of the plurality of LEDs provided in the first light source 42, and are disposed so as to sandwich the plurality of LEDs from the upper and lower sides. It becomes a reflector.

  The first side reflector 31a is formed at one end in the parallel direction of the plurality of LEDs provided in the first light source 42 in the space sandwiched between the first reflecting surface 35a of the shade 35 and the third reflecting surface 31r of the reflector 31. Is done. The second side reflector 31b is formed at the other end of the space. The 1st side reflector 31a and the 2nd side reflector 31b are formed so that a mutual space may spread as it goes to the front from back.

  The reflector 32 is disposed below the second light source 52 and has a fourth reflecting surface 32r covering the lower side of the second light source 52 on the second light source 52 side. The fourth reflecting surface 32r and the second reflecting surface 35b of the shade 35 are formed along the parallel direction of the plurality of LEDs provided in the second light source 52, and are disposed so as to sandwich the plurality of LEDs from above and below. It becomes a reflector.

  The first side reflector 32a is formed at one end in the parallel direction of the plurality of LEDs provided in the second light source 52 in the space sandwiched between the second reflecting surface 35b of the shade 35 and the fourth reflecting surface 32r of the reflector 32. Is done. The second side reflector 32b is formed at the other end of the space. The 1st side reflector 32a and the 2nd side reflector 32b are formed so that a mutual space may spread as it goes to the front from back.

  The projection lens 15 is a plano-convex lens, and is disposed at a position where the normal line of the emission surface 42 f of the first light source 42 and the normal line of the emission surface 52 f of the second light source 52 pass in front of the first light source 42 and the second light source 52. Is done. The first light and the second light are incident from a flat incident surface on the back side of the projection lens 15 and are transmitted through the projection lens. In the present embodiment, the focal point of the projection lens 15 is formed between the front end 35 c of the shade 35 and the projection lens 15.

  The lens holder 20 shown in FIGS. 1 to 4 is disposed between the cooling unit 70 and the projection lens 15. When the projection lens 15 is fixed to the lens holder 20 and the lens holder 20 is fixed to the cooling unit 70, the relative positions of the projection lens 15, the lens holder 20, and the cooling unit 70 are fixed. Further, since the reflector unit 30, the first light source unit 40, the second light source unit 50, and the third light source unit 60 are fixed to the cooling unit 70, the reflector unit 30, the first light source unit 40, the second light source unit 50, The relative positions of the third light source unit 60, the projection lens 15, and the lens holder 20 are also fixed.

  An optical member 21 that adjusts the light distribution of the third light emitted from the third light source 62 is integrally formed on the side of the lens holder 20 on the side where the third light source 62 is disposed. The optical member 21 of the present embodiment is a convex lens whose width in the direction perpendicular to the direction in which the third light is incident increases from the rear toward the front. That is, the width of the optical member 21 in the vertical direction increases from the rear end 21 a of the optical member 21 toward the front end 21 b of the optical member 21. In addition, the lens holder 20 of the present embodiment has a notch 22 serving as a through hole formed between the optical member 21 and the projection lens 15.

  Next, the emission of light from the vehicle headlamp 1 and the operation of the vehicle headlamp 1 according to the present embodiment will be described. FIG. 6 is a diagram schematically showing an example of an optical path of light emitted from the first light source 42 and the second light source 52 by enlarging a part of FIG. Note that the angle of each reflecting surface, the light reflection angle, the refraction angle, and the like shown in FIG. 6 may not be accurate. Further, as described above, the vehicle headlamps are provided symmetrically on the left and right sides of the vehicle. In the following description of the light distribution, the light distribution when the vehicle headlamps provided on the left and right are similarly turned on or off will be described.

  The first lights L11, L12, and L13 emitted from the first light source 42 are incident on the projection lens 15 and transmitted through the front cover 12 as will be described below. The low beam light distribution shown in FIG.

  The first lights L11, L12, and L13 are emitted from the emission surface 42f of each LED provided in the first light source 42. In the LED, the intensity of the first lights L11 and L12 emitted in the direction perpendicular to the emission surface 42f is relatively higher than the intensity of the first light L13 emitted in the other direction. Since the normal line of the emission surface 42f of each LED provided in the first light source 42 faces obliquely downward, the first light L11 and L12 emitted perpendicularly from the emission surface 42f of the first light source 42 is shaded 35. Is emitted toward the front end 35c of the shade 35 and passes through the vicinity of the front end 35c of the shade 35 or the front end 35c of the shade 35. Therefore, all or part of the first lights L11 and L12 emitted perpendicularly from the emission surface 42f of the first light source 42 are irradiated in the vicinity of the front end 35c of the shade 35 and are incident on the front end 35c of the shade 35. The amount of light of one light L11, L12 increases. In addition, a part of the first light irradiated behind the front end 35 c of the shade 35 is shielded by the shade 35. The shade 35 shields a part of the first light in this way, so that the front end 35c of the shade 35 can form a cut line of a low beam light distribution by the first light. In the present embodiment, as described above, a part of the first light directly enters the front end 35c of the shade 35 where the cut line is formed, and the amount of the first light incident on the front end 35c increases. The vicinity of the front end 35c of the shade 35 tends to be bright. Here, the focal point 15f of the projection lens 15 is formed between the front end 35c of the shade 35 and the projection lens 15, that is, in the vicinity of the front end 35c of the shade 35, thereby brightening the vicinity of the cut line of the low beam light distribution. be able to. In addition, the front end 35c of the shade 35 has a shape that matches the shape of a desired cut line of the low beam, and is formed in a concave shape as described above in the present embodiment.

  At least a part of the first light L12 passing forward from the front end 35c of the shade 35 is directly incident on the projection lens 15. Further, the other part of the first light is reflected forward by any one of the first reflecting surface 35a, the third reflecting surface 31r, the first side reflector 31a, and the second side reflector 31b and enters the projection lens 15. To do.

  The first light L11 reflected by the first reflecting surface 35a is incident on the projection lens 15 after having a divergent angle and being reflected forward. For this reason, the predetermined range of the light distribution of the first light can be made relatively brighter than the other ranges. For example, by collecting the first light L11 reflected by the first reflecting surface 35a in the vicinity of the front end 35c of the shade 35, the vicinity of the cut line of the low beam light distribution can be brightened.

  In the present embodiment, the first reflecting surface 35a and the third reflecting surface 31r are provided so as to sandwich the plurality of LEDs provided in the first light source 42 from above and below, thereby the first light emitted from the plurality of LEDs. It becomes easy to use light effectively. Most of the first light is incident on the projection lens 15 directly or after being reflected by the first reflecting surface 35a as described above. Thus, since the 3rd reflective surface 31r does not reflect all the 1st lights, the enlargement can be suppressed.

  The first light L11 reflected by the first reflecting surface 35a is preferably collected near the front end 35c of the shade 35 as described above. On the other hand, it is preferable that the light distribution of the first light is formed by irradiating the first light L13 reflected by the third reflecting surface 31r to a wider range. Therefore, it is preferable that the first light L13 reflected by the third reflecting surface 31r is diverged.

  In addition, the first side reflector 31a and the second side reflector 31b diffuse light, thereby diffusing the light from the LEDs disposed at both ends of the plurality of LEDs provided in the first light source 42 and emitting it to a wide range. Can be made. For this reason, even if the number of LEDs provided in the first light source 42 is reduced, a wide light distribution can be formed.

  The second lights L21, L22, and L23 emitted from the second light source 52 are incident on the projection lens 15 and transmitted through the front cover 12 as will be described below. At this time, at least a part of the second lights L21, L22, and L23 are emitted upward from the first lights L11, L12, and L13. Accordingly, a light distribution above the cut line is formed by at least a part of the second lights L21, L22, and L23. Further, the light distribution by the second light emitted from the second light source 52 and the light distribution by the first light emitted from the first light source 42 are combined to form the high beam light distribution shown in FIG. .

  The second lights L21, L22, L23 are emitted from the emission surface 52f of each LED provided in the second light source 52. Since the normal line of the emission surface 52f of each LED provided in the second light source 52 faces obliquely upward, the second light L23 emitted perpendicularly from the emission surface 52f of the second light source 52 is in front of the shade 35. The light is emitted toward the end 35c, and the vicinity of the front end 35c of the shade 35 tends to be bright. Here, as described above, the focal point of the projection lens 15 is formed in the vicinity of the front end 35c of the shade 35, whereby the vicinity of the cut line, that is, the light distribution of the first light and the light distribution of the second light. The overlapping portion can be made brighter than other portions.

  At least a part of the second light L21 passing forward from the front end 35c of the shade 35 is directly incident on the projection lens 15. Further, another part of the second light is reflected forward by any one of the second reflecting surface 35b, the fourth reflecting surface 32r, the first side reflector 32a, and the second side reflector 32b and enters the projection lens 15. To do.

  The second light L23 reflected by the second reflecting surface 35b has a small divergence angle and is reflected forward and then enters the projection lens 15. For this reason, the predetermined range of the light distribution of the second light can be made relatively brighter than the other ranges. For example, by collecting the second light L23 reflected by the second reflecting surface 35b in the vicinity of the front end 35c of the shade 35, a portion where the light distribution of the first light and the light distribution of the second light overlap is made brighter. can do.

  In the present embodiment, the second reflecting surface 35b and the fourth reflecting surface 32r are provided so as to sandwich the plurality of LEDs provided in the second light source 52 from above and below, whereby the second LEDs emitted from the plurality of LEDs are provided. It becomes easy to use light effectively. Most of the second light is incident on the projection lens 15 directly or after being reflected by the second reflecting surface 35b as described above. Thus, since the 4th reflective surface 32r does not reflect all the 2nd lights, the enlargement can be suppressed.

  The second light L23 reflected by the second reflecting surface 35b is preferably collected in the vicinity of the front end 35c of the shade 35 as described above. On the other hand, it is preferable that the second light L22 reflected by the fourth reflecting surface 32r is applied to a wider range, thereby forming the light distribution of the second light. Therefore, it is preferable that the second light L22 reflected by the fourth reflecting surface 32r is diverged.

  Further, the first side reflector 32a and the second side reflector 32b diffuse light, thereby diffusing the light from the LEDs arranged at both ends of the plurality of LEDs provided in the second light source 52, and emitting the light to a wide range. Can be made. For this reason, a wide light distribution can be formed even if the number of LEDs provided in the second light source 52 is reduced.

  During daytime illumination, at least some of the plurality of LEDs provided in the first light source 42 and the second light source 52 are weakly lit, for example, so that the daytime illumination distribution shown in FIG. 7C is formed. The

  The third light is emitted from the third light source 62 in the lateral direction as described above. The third light emitted from the third light source 62 is emitted after the light distribution is adjusted by the optical member 21. By emitting the third light in this way, it becomes easy to use the third light source 62 as a light source for side illumination of the vehicle. Further, since the optical member 21 is a lens whose width in the direction perpendicular to the direction in which the third light enters as the optical member 21 moves from the rear to the front, the third light can be easily emitted obliquely forward and laterally. Become. In addition, since the optical member 21 is a convex lens, the divergence angle of the third light can be reduced to easily irradiate a predetermined range. Further, as described above, the notch 22 is formed between the optical member 21 and the projection lens 15, whereby the third light propagates from the optical member 21 to the projection lens 15 and is not intended from the projection lens 15. The emission of light can be suppressed. In this way, the light distribution of the third light is adjusted by the optical member 21 separately from the first light and the second light.

  The third light emitted from the third light source 62 is irradiated with the first light or the second light in conjunction with at least one of the steering operation of the vehicle and the operation of the direction indicator as described above. The light is temporarily emitted toward the outside of the vehicle in front view rather than the range.

  As described above, the heat generated when the first light source 42, the second light source 52, and the third light source 62 emit light is transmitted to the heat sink 71 and is cooled by the cooling fan 75. As described above, in the vehicle headlamp 1 of this embodiment, the first light source 42, the second light source 52, and the third light source 62 share one heat sink 71. For this reason, it is not necessary to provide a heat sink or cooling fan for the third light source 62 separately from the heat sink or cooling fan for the first light source 42 and the second light source 52. Therefore, the vehicular headlamp 1 can be suppressed in size while being provided with the third light source 62 in addition to the first light source 42 that is a low beam light source and the second light source 52 that is a high beam light source. Further, as described above, the optical member 21 that adjusts the light distribution of the third light and the projection lens 15 are integrated, whereby the increase in size of the vehicle headlamp 1 can be further suppressed.

  Further, as described above, in the vehicle headlamp 1, since the normal line of the emission surface 42 f of the first light source 42 faces obliquely forward and downward, a part of the first light is directly incident on the projection lens 15. In addition, the other part of the first light can be reflected by the first reflecting surface 35 a disposed below the first light source 42 and incident on the projection lens 15. For this reason, the first light can be used effectively. In addition, since the normal line of the emission surface 52f of the second light source 52 faces obliquely upward and forward, a part of the second light is directly incident on the projection lens 15 and another part of the second light is incident. The light can be reflected by the second reflecting surface 35 b disposed above the second light source 52 and incident on the projection lens 15. For this reason, the second light can be used effectively. Furthermore, since the first reflection surface 35a and the second reflection surface 35b are formed on one surface and the other surface of the shade 35, the first reflection surface 35a and the second reflection surface 35b are formed by one member. Can do. Further, since it is assumed that a part of the first light and a part of the second light are directly incident on the projection lens 15 respectively, the first reflecting surface 35a and the second reflecting surface 35b are greatly pushed forward. There is no need to let them. Thus, in the vehicle headlamp 1, the first light and the second light can be efficiently incident on the projection lens 15 without using a large reflector. Therefore, the vehicular headlamp 1 includes a plurality of light sources that emit light in different directions, and an increase in size can be suppressed while effectively using light from these light sources.

  As mentioned above, although the said embodiment was demonstrated to the example about this invention, this invention is not limited to these.

  For example, in the above embodiment, the first light source is a low beam light source and the second light source is a high beam light source. However, the first light source and the second light source are not limited to the embodiment, and may be light sources that emit other light.

  Moreover, in the said embodiment, the 1st light reflected by the 1st reflective surface 35a and the 2nd light reflected by the 2nd reflective surface 35b give the example by which a divergence angle is made small and reflected ahead. As described above, the divergence angle of one of the first light reflected by the first reflecting surface 35a and the second light reflected by the second reflecting surface 35b may be reduced, and both divergence angles are reduced. It is not necessary.

  In the above embodiment, the first light reflected by the third reflecting surface 31r and the second light reflected by the fourth reflecting surface 32r have been described as examples. However, the third reflecting surface has been described. One of the first light reflected by 31r and the second light reflected by the fourth reflecting surface 32r may be diverged, or both may not be diverged. Further, the third reflecting surface 31r and the fourth reflecting surface 32r are not essential components.

  Moreover, the emission direction of the third light is not particularly limited. For example, the third light may be an overhead sign lamp by being emitted obliquely upward and forward from the vehicle headlamp. Further, the third light may be emitted from a vehicle headlamp obliquely forward and downward to irradiate a part of a low beam light distribution or a traveling line. Further, the third light may be a light distribution as a clearance lamp (CLL) or an auxiliary light distribution as a daytime running lamp (DRL).

  The arrangement of the third light source 62 is not particularly limited. For example, the third light source 62 may be disposed above the first light source 42 or may be disposed below the second light source 52. Further, the third light source 62 may be provided on the first substrate 41. In this case, the third light source 62 may be provided separately from the first light source 42, or may be provided so that light can be emitted in a direction different from that of the first light source 42 by bending the first substrate 41. .

  The optical member 21 that adjusts the light distribution of the third light may be provided separately from the lens holder 20. The optical member 21 is not limited to a lens, and may be a reflecting member that reflects the third light in a desired direction, and the form can be appropriately changed according to the emission direction of the third light. it can.

  In the above-described embodiment, an example in which a through hole is formed between the lens holder 20 and the projection lens 15 by the notch 22 formed in the lens holder 20 has been described. However, from the viewpoint of suppressing part of the third light from propagating to the projection lens 15, a through hole may be formed in front of the optical member 21 in the lens holder 20. 15 may be provided with a light shielding member. However, the present invention is not limited to a mode in which the third light is prevented from propagating to the projection lens 15, and part of the third light may be incident on the projection lens 15.

  Further, a form in which at least one of the first light source 42, the second light source 52, and the third light source 62 is disposed on another heat sink is also conceivable. For example, one of the first light source 42 and the second light source 52 and the third light source 62 may share one heat sink, and the other of the first light source 42 and the second light source 52 may be disposed on another heat sink.

  As described above, according to the present invention, there is provided a vehicular headlamp that includes a plurality of light sources that emit light in different directions and that can suppress the increase in size while effectively using light from these light sources. The vehicle headlamp can be used in the field of vehicle headlamps such as automobiles.

DESCRIPTION OF SYMBOLS 10 ... Housing 15 ... Projection lens 20 ... Lens holder 21 ... Optical member 22 ... Notch 30 ... Reflector unit 31, 32 ... Reflector 31r ... Third reflection Surface 32r ... Fourth reflective surface 35 ... Shade 35a ... First reflective surface 35b ... Second reflective surface 35c ... Front end 42 ... First light source 52 ... Second light source 62 ... third light source 70 ... cooling unit 71 ... heat sink LU ... lamp unit

Claims (8)

A first light source that emits first light;
A second light source disposed below the first light source and emitting second light;
A projection lens disposed in front of the first light source and the second light source and transmitting the first light and the second light;
A shade that is disposed between the first light source and the second light source and shields a portion of the first light;
With
The shade extends from the first light source side toward the projection lens, and has a concave first reflecting surface that reflects part of the first light forward, and the projection lens from the second light source side. And a concave second reflecting surface that reflects a part of the second light forward,
The normal line of the emission surface of the first light source faces obliquely downward and forward,
A vehicular headlamp characterized in that a normal line of an emission surface of the second light source is directed obliquely upward to the front. The vehicular headlamp according to claim 1, wherein a focal point of the projection lens is formed between a front end of the shade and the projection lens. 3. The vehicle headlamp according to claim 1, wherein the first light source and the second light source are arranged at positions asymmetric with respect to an optical axis of the projection lens in a vertical section. light. At least one of the first light reflected by the first reflecting surface and the second light reflected by the second reflecting surface is reflected forward with a divergence angle being reduced. The vehicle headlamp according to any one of claims 1 to 3. A third reflecting surface covering above the first light source;
A fourth reflecting surface covering the lower side of the second light source;
The vehicle headlamp according to any one of claims 1 to 4, further comprising: The front for a vehicle according to claim 5, wherein at least one of the first light reflected by the third reflecting surface and the second light reflected by the fourth reflecting surface is diverged. Lighting. The vehicle headlamp according to any one of claims 1 to 6, wherein at least one of the first light source and the second light source includes an LED array. The vehicle headlamp according to any one of claims 1 to 7, wherein a front end of the shade is gradually recessed backward from the left and right ends toward the center.

Images