JP6980377B2 - Vehicle headlights - Google Patents

Description

The present invention relates to a vehicle headlight.

As a vehicle headlight typified by an automobile headlight, a light source for a low beam that illuminates the front at night and a light source for a high beam that illuminates a distance farther than the low beam are known. The light from the light source for the high beam includes the light emitted above the low beam. Further, there is known a vehicle headlight in which these light sources are provided in one lamp unit.

For example, in Patent Document 1 below, a first light emitting element that emits light upward, a first reflector arranged so as to cover the first light emitting element from the upper side, and a second light emitting element that emits light downward are described. For vehicles, a second reflector arranged 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. Lighting fixtures are disclosed.

Japanese Unexamined Patent Publication No. 2006-164735

In the vehicle lighting fixture 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 emitted from the projection lens. Is emitted downward with respect to the optical axis of. The light emitted from the first light emitting element is reflected forward by the first reflector so that the light emitted in this way is incident on the projection lens arranged in front of the first light emitting element and the second light emitting element. At the same time, it is necessary to reflect the light emitted from the second light emitting element by the second reflector forward.

In the vehicle lighting fixture disclosed in Patent Document 1, in order to efficiently inject the light emitted from the first light emitting element and the light emitted from the second light emitting element into the projection lens, the first reflector and the light emitting element are used. It is preferable that the second reflectors are provided so as to protrude greatly forward. However, when the first reflector and the second reflector are increased in size in this way, the size of the lamp is likely to increase.

Therefore, an object of the present invention is to provide a headlight for a vehicle which is provided with a plurality of light sources that emit light in different directions and can suppress the increase in size while effectively utilizing the light from these light sources. do.

In order to solve the above problems, the vehicle headlight of the present invention includes a first light source that emits a first light and a second light source that is arranged below the first light source and emits a second light. , A projection lens arranged in front of the first light source and the second light source and transmitting the first light and the second light, and arranged between the first light source and the second light source. A shade that shields a part of the first light is provided, and the shade extends from the first light source side toward the projection lens and reflects a part of the first light forward. It has a concave first reflecting surface and a concave second reflecting 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 emission surface of the first light source faces diagonally forward and downward, and the normal line of the emission surface of the second light source faces diagonally upward and forward.

In the vehicle headlight, since the normal of the emission surface of the first light source points diagonally forward and downward, a part of the first light is directly incident on the projection lens and the other one of the first light. The portion can be reflected by the first reflecting surface arranged below the first light source and incident on the projection lens. Therefore, the first light can be effectively used. Further, since the normal of the emission surface of the second light source faces diagonally upward forward, a part of the second light is directly incident on the projection lens and the other part of the second light is directed to the second light source. It can be reflected by the second reflecting surface arranged above and incident on the projection lens. Therefore, the second light can be effectively used. Further, since the first reflecting surface and the second reflecting surface are formed on one surface and the other surface of the shade, one member can form the first reflecting surface and the second reflecting surface. 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, it is necessary to greatly push the first reflecting surface and the second reflecting surface forward. No. As described above, in the vehicle headlight, the first light and the second light can be efficiently incident on the projection lens without using a large reflector. Therefore, the vehicle headlights are provided with a plurality of light sources that emit light in different directions from each other, and the increase in size can be suppressed while effectively utilizing the light from these light sources.

Further, it is preferable that the focal point of the projection lens is formed between the front end of the shade and the projection lens.

By shielding a part of the first light as described above, the front end of the shade can form a cut line of light distribution by the first light. Further, as described above, the normal of the exit surface of the first light source faces diagonally forward and downward, and the normal of the exit surface of the second light source faces diagonally upward and forward, so that the first light and the second light are shaded. It is emitted toward the front end of the shade, and the vicinity of the front end of the shade tends to be bright. Here, by forming the focal point of the projection lens 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.

Further, in the vertical cross section, it is preferable that the first light source and the second light source are arranged at positions asymmetrical 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 small divergence angle. ..

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. Therefore, a 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. Further, by reducing the divergence angle of the second light reflected forward by the second reflecting surface, the second light can be collected in a predetermined range and then incident on the projection lens. Therefore, a predetermined range of the second light distribution can be made relatively brighter than the other ranges. For example, it is possible to brighten the portion where the light distribution of the first light and the light distribution of the second light overlap.

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

By providing the third reflecting surface and the fourth reflecting surface as described above, it becomes easier to use the first light and the second light more effectively. Most of the first light emitted from the first light source is directly reflected by the first reflecting surface or incident on the projection lens as described above. Since the third reflecting surface is not supposed to reflect all the light emitted from the light source like the reflector described in Patent Document 1, it is as described in Patent Document 1. It can be made smaller than the reflector. Further, since most of the second light emitted from the second light source is directly reflected by the second reflecting surface or incident on the projection lens as described above, 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 emitted.

By diverging the first light reflected by the third reflecting surface, the first light can be irradiated over a wide range. Similarly, the second light reflected by the fourth reflecting surface can also irradiate the second light over a wide range by being emitted.

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

When the first light source and the second light source are composed of an LED array, 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 will be easier.

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

The shape of the front end of the shade facilitates the desired shape of the cut line.

As described above, according to the present invention, there is provided a headlight for a vehicle which is provided with a plurality of light sources that emit light in different directions and can suppress the increase in size while effectively utilizing the light from these light sources. Will be done.

It is a figure which shows the lamp unit which concerns on embodiment of this invention, and the housing which accommodates the lamp unit. It is a perspective view of the lamp unit shown in FIG. It is an exploded perspective view of the lamp unit shown in FIG. It is sectional drawing in the vertical direction of the lamp unit shown in FIG. FIG. 3 is a front view of the reflector unit, the first light source, and the second light source shown in FIG. It is a figure which enlarges a part of FIG. 4 and shows roughly the optical path example of the light emitted from the 1st light source and the 2nd light source. 7A is a diagram showing a low beam light distribution, FIG. 7B is a diagram showing a high beam light distribution, and FIG. 7C is a diagram showing a daytime lighting distribution.

Hereinafter, embodiments for implementing the vehicle headlights according to the present invention will be illustrated together with the accompanying drawings. The embodiments illustrated below are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. The present invention can be modified or improved from the following embodiments without departing from the spirit of the present invention.

The vehicle headlights are generally provided in each of the left and right directions in front of the vehicle, and the left and right vehicle headlights are configured to be substantially symmetrical in the left and right directions. Therefore, in the present embodiment, one of the vehicle headlights will be described.

FIG. 1 is a diagram showing a lamp unit according to the present embodiment and a housing for accommodating the lamp unit. Note that FIG. 1 shows a side view of the lamp unit and a cross-sectional view of the housing.

As shown in FIG. 1, the vehicle headlight 1 of the present embodiment includes a housing 10 and a lamp unit LU housed 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. Further, an opening smaller than the front is formed behind the lamp housing 11, and the back cover 13 is fixed to the lamp housing 11 so as to close the opening.

The 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 referred to as a light chamber LR. The lamp unit LU is housed inside.

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.

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

The cooling unit 70 includes a heat sink 71 and a cooling fan 75 as main components. The heat sink 71 has a first base portion 72, a second base portion 73, and heat radiation fins 74. The first base portion 72 is a plate-shaped body extending diagonally upward and left and right in the front, and the second base portion 73 is a plate-shaped body extending diagonally downward and left and right in front of 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 surface side of the heat radiation fin 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 first light source 42 is arranged on the first substrate 41 and emits a first light that becomes a low beam. The first light source 42 is composed of a plurality of light sources arranged in parallel. The first light source 42 of this 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, it is possible to control the light distribution of the first light emitted from the first light source 42. The lighting pattern of the first light source 42 is controlled by inputting an electric signal to a light emission control circuit (not shown) via the 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. Since the first base portion 72 extends diagonally upward in the front as described above, the surface of the first substrate 41 also extends diagonally upward in the front. Further, 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 of the exit surface of the first light source 42 faces diagonally forward and 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 second light source 52 is arranged on the second substrate 51 and emits a second light that becomes a high beam. The second light source 52 is composed of 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, it is possible to control the light distribution of the second light emitted from the second light source 52. The lighting pattern of the second light source 52 is controlled by inputting an electric signal to a light emission control circuit (not shown) via the 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. Since the second base portion 73 extends diagonally downward in the front as described above, the surface of the second substrate 51 also extends diagonally downward in the front. Further, 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 of the exit surface of the second light source 52 faces diagonally forward and 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 arranged 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 asymmetrical with respect to the optical axis of the projection lens 15. Further, as described above, the normal of the emission surface of the first light source 42 faces diagonally forward and downward, and the normal of the emission surface of the second light source 52 faces diagonally downward and forward, so that the first light from the first light source 42 faces. The direction in which light is emitted and the direction in which the second light is emitted from the second light source 52 intersect with 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 arranged on the third substrate 61 and emits a third light in conjunction with at least one of the operation of the steering of the vehicle and the operation of the direction indicator. For example, the amount of light of the third light is adjusted according to the steering angle of the steering. The third light source 62 of this embodiment is an LED. Further, the third substrate 61 is fixed to the side of the heat sink 71, and the third light is emitted laterally from the third light source 62. Specifically, the optical axis of the projection lens 15 and the normal of the emission surface 62f of the third light source 62 are orthogonal to each other when viewed from above, and the normal of the emission surface 62f of the third light source 62 is It does not pass through the projection lens 15. Further, 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 electric signal input to a light emission control circuit (not shown) via the third connector 63.

FIG. 4 is a cross-sectional view of the lamp unit LU shown in FIG. 2 in the vertical direction. 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, and a reflector 32 for the second light source 52. It has a first side reflector 32a for the second light source 52 and a second side reflector 32b for the second light source 52 as main components.

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

The reflector 31 is arranged above the first light source 42, and has a third reflecting surface 31r that covers the upper part 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 a plurality of LEDs provided in the first light source 42, and are arranged so as to sandwich the plurality of LEDs from above and below. It becomes a reflector of.

The first side reflector 31a is formed at one end in the parallel direction of a 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. Will be done. Further, the second side reflector 31b is formed at the other end of the space. The first side reflector 31a and the second side reflector 31b are formed so that the distance between them increases from the rear to the front.

The reflector 32 is arranged below the second light source 52, and has a fourth reflecting surface 32r that covers the lower part 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 a plurality of LEDs provided in the second light source 52, and are arranged so as to sandwich the plurality of LEDs from above and below. It becomes a reflector of.

The first side reflector 32a is formed at one end in the parallel direction of a 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. Will be done. Further, the second side reflector 32b is formed at the other end of the space. The first side reflector 32a and the second side reflector 32b are formed so that the distance between them increases from the rear to the front.

The projection lens 15 is a plano-convex lens and is arranged at a position in front of the first light source 42 and the second light source 52 so that the normal of the emission surface 42f of the first light source 42 and the normal of the emission surface 52f of the second light source 52 pass. Will be done. The first light and the second light enter from the flat incident surface on the back surface side of the projection lens 15 and pass through the projection lens. Further, in the present embodiment, the focal point of the projection lens 15 is formed between the front end 35c of the shade 35 and the projection lens 15.

The lens holder 20 shown in FIGS. 1 to 4 is arranged between the cooling unit 70 and the projection lens 15. By fixing the projection lens 15 to the lens holder 20 and fixing the lens holder 20 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 for adjusting 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 arranged. 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 to the front. That is, the width of the optical member 21 in the vertical direction increases from the rear end 21a of the optical member 21 toward the front end 21b of the optical member 21. Further, the lens holder 20 of the present embodiment has a notch 22 which is a through hole formed between the optical member 21 and the projection lens 15.

Next, the emission of light from the vehicle headlight 1 and the operation of the vehicle headlight 1 of the present embodiment will be described. FIG. 6 is an enlarged view of a part of FIG. 4 and is a diagram schematically showing an example of an optical path of light emitted from a first light source 42 and a second light source 52. The angle of each reflecting surface, the angle of reflection of light, the angle of refraction, and the like shown in FIG. 6 may not be accurate. Further, as described above, the vehicle headlights are provided symmetrically to the left and right of the vehicle. In the following description of the light distribution, the light distribution when the vehicle headlights provided on the left and right are similarly turned on or off will be described.

The first light L11, L12, L13 emitted from the first light source 42 is incident on the projection lens 15 and transmitted through the projection lens 15 as described below, and is emitted through the front cover 12 to be emitted from FIG. 7A. The low beam light distribution shown in is formed.

The first light L11, L12, L13 is emitted from the emission surface 42f of each LED provided in the first light source 42. In the LED, the intensity of the first light L11 and L12 emitted in the direction perpendicular to the emission surface 42f is relatively stronger than the intensity of the first light L13 emitted in the other direction. Since the normal of the emission surface 42f of each LED provided in the first light source 42 faces diagonally forward and downward, the first lights L11 and L12 vertically emitted from the emission surface 42f of the first light source 42 are shades 35. Is emitted toward the front end 35c of the shade 35, and passes in the vicinity of the front end 35c of the shade 35 or in front of the front end 35c of the shade 35. Therefore, all or part of the first light L11, L12 vertically emitted from the emission surface 42f of the first light source 42 is irradiated in the vicinity of the front end 35c of the shade 35, and is incident on the front end 35c of the shade 35. The amount of light of the light L11 and L12 of No. 1 increases. Further, a part of the first light emitted behind the front end 35c of the shade 35 is shielded by the shade 35. By the shade 35 thus shielding a part of the first light, the front end 35c of the shade 35 can form a cut line of the low beam light distribution by the first light. In the present embodiment, as described above, a part of the first light is directly incident on the front end 35c of the shade 35 on which the cut line is formed, and the amount of light of the first light incident on the front end 35c is increased. 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 light distribution of the low beam. be able to. 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 in front of 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 is incident on the projection lens 15. do.

The first light L11 reflected by the first reflecting surface 35a is incident on the projection lens 15 after the divergence angle becomes small and the light is reflected forward. Therefore, a 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 made brighter.

Further, 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, so that the first one emitted from the plurality of LEDs is emitted. It becomes easier to use light effectively. Most of the first light is directly reflected by the first reflecting surface 35a or reflected on the first reflecting surface 35a as described above and is incident on the projection lens 15. As described above, since the third reflecting surface 31r does not reflect all of the first light, the increase in size can be suppressed.

As described above, the first light L11 reflected by the first reflecting surface 35a is preferably collected in the vicinity of the front end 35c of the shade 35. On the other hand, it is preferable that the first light L13 reflected by the third reflecting surface 31r is irradiated in a wider range to form a light distribution of the first light. Therefore, it is preferable that the first light L13 reflected by the third reflecting surface 31r is emitted.

Further, the first side reflector 31a and the second side reflector 31b diffuse the light to diffuse the light from the LEDs arranged at both ends of the plurality of LEDs provided in the first light source 42 and emit the light over a wide range. Can be made to. Therefore, a wide light distribution can be formed even if the number of LEDs provided in the first light source 42 is reduced.

The second light L21, L22, L23 emitted from the second light source 52 is incident on the projection lens 15 and transmitted through the projection lens 15 as described below, and is emitted through the front cover 12. At this time, at least a part of the second light L21, L22, L23 is emitted upward from the first light L11, L12, L13. Therefore, at least a part of the second light L21, L22, L23 forms a light distribution above the cut line. 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. 7B. ..

The second light L21, L22, L23 is emitted from the emission surface 52f of each LED provided in the second light source 52. Since the normal of the emission surface 52f of each LED provided in the second light source 52 faces diagonally upward, the second light L23 emitted vertically from the emission surface 52f of the second light source 52 is in front of the shade 35. It is emitted toward the end 35c, and the vicinity of the front end 35c of the shade 35 tends to be bright. Here, by forming the focal point of the projection lens 15 in the vicinity of the front end 35c of the shade 35 as described above, the vicinity of the cut line, that is, the light distribution of the first light and the light distribution of the second light are arranged. The overlapping part can be made relatively brighter than the other parts.

At least a part of the second light L21 passing in front of the front end 35c of the shade 35 is directly incident on the projection lens 15. Further, the other 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 is incident on the projection lens 15. do.

The second light L23 reflected by the second reflecting surface 35b is reflected forward after the divergence angle becomes small and then enters the projection lens 15. Therefore, a predetermined range of the second light distribution 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, the portion where the light distribution of the first light and the light distribution of the second light overlap is made brighter. can do.

Further, 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, so that the second LED is emitted from the plurality of LEDs. It becomes easier to use light effectively. Most of the second light is directly reflected by the second reflecting surface 35b or incident on the projection lens 15 as described above. As described above, since the fourth reflecting surface 32r does not reflect all of the second light, the increase in size 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 irradiated in a wider range to form a light distribution of the second light. Therefore, it is preferable that the second light L22 reflected by the fourth reflecting surface 32r is emitted.

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

At the time of daytime lighting, at least a part of the plurality of LEDs provided in the first light source 42 and the second light source 52 is weakly lit, and the light distribution of the daytime lighting shown in FIG. 7C is formed. The light source.

The third light is emitted laterally from the third light source 62 as described above. The light distribution of the third light emitted from the third light source 62 is adjusted by the optical member 21 and emitted. By emitting the third light in this way, it becomes easy to use the third light source 62 as a light source for lateral irradiation 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 is incident increases as the optical member 21 moves from the rear to the front, it is easy to emit the third light diagonally forward and laterally. Become. Further, since the optical member 21 is a convex lens, the divergence angle of the third light is reduced and it becomes easy to irradiate a predetermined range. Further, by forming the notch 22 between the optical member 21 and the projection lens 15 as described above, the third light propagates from the optical member 21 to the projection lens 15 and is not intended from the projection lens 15. It is possible to suppress the emission of light. In this way, the light distribution of the third light is adjusted separately from the first light and the second light by the optical member 21.

The third light emitted from the third light source 62 is linked to at least one of the operation of the steering of the vehicle and the operation of the turn signal as described above, and the first light and the second light are irradiated. It is temporarily irradiated 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 transferred to the heat sink 71 and cooled by the cooling fan 75. As described above, in the vehicle headlight 1 of the present embodiment, the first light source 42, the second light source 52, and the third light source 62 share one heat sink 71. Therefore, it is not necessary to provide a heat sink, a cooling fan, or the like for the third light source 62 separately from the heat sink and the cooling fan for the first light source 42 and the second light source 52. Therefore, the vehicle headlight 1 can be suppressed in size while being provided with a third light source 62 in addition to the first light source 42 which is a light source for a low beam and the second light source 52 which is a light source for a high beam. Further, by integrating the optical member 21 for adjusting the light distribution of the third light and the projection lens 15 as described above, the increase in size of the vehicle headlight 1 can be further suppressed.

Further, as described above, in the vehicle headlight 1, since the normal of the emission surface 42f of the first light source 42 faces diagonally forward and downward, a part of the first light is directly incident on the projection lens 15. At the same time, the other part of the first light can be reflected by the first reflecting surface 35a arranged below the first light source 42 and incident on the projection lens 15. Therefore, the first light can be effectively used. Further, since the normal of the emission surface 52f of the second light source 52 faces diagonally upward forward, a part of the second light is directly incident on the projection lens 15 and the other part of the second light is emitted. It can be reflected by the second reflecting surface 35b arranged above the second light source 52 and incident on the projection lens 15. Therefore, the second light can be effectively used. Further, since the first reflecting surface 35a and the second reflecting surface 35b are formed on one surface and the other surface of the shade 35, the first reflecting surface 35a and the second reflecting surface 35b are formed by one member. Can be done. 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, the first reflecting surface 35a and the second reflecting surface 35b are greatly pushed forward. There is no need to let it. As described above, in the vehicle headlight 1, the first light and the second light can be efficiently incident on the projection lens 15 without using a large reflector. Therefore, the vehicle headlight 1 is provided with a plurality of light sources that emit light in different directions from each other, and the increase in size can be suppressed while effectively utilizing the light from these light sources.

Although the present invention has been described above by exemplifying the above embodiments, the present invention is not limited thereto.

For example, in the above embodiment, an example in which the first light source is a light source for a low beam and the second light source is a light source for a high beam has been described. However, the first light source and the second light source are not limited to this form, and may be light sources that emit other light.

Further, in the above embodiment, the first light reflected by the first reflecting surface 35a and the second light reflected by the second reflecting surface 35b are reflected forward with a small divergence angle. 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 diverging angles may be reduced. It doesn't have to be.

Further, in the above embodiment, an example in which the first light reflected by the third reflecting surface 31r and the second light reflected by the fourth reflecting surface 32r are diverged has been described, but the third reflecting surface has been described. One of the first light reflected by the 31r and the second light reflected by the fourth reflecting surface 32r may be emitted, or both may not be emitted. Further, the third reflecting surface 31r and the fourth reflecting surface 32r are not essential components.

Further, the emission direction of the third light is not particularly limited. For example, the third light may be used as an overhead sign lamp by being emitted diagonally upward from the vehicle headlight. Further, the third light may be light emitted from the vehicle headlights diagonally forward and downward to illuminate a part of the low beam light distribution or the 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).

Further, the arrangement of the third light source 62 is not particularly limited. For example, the third light source 62 may be arranged above the first light source 42, or may be arranged 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 apart 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. ..

Further, the optical member 21 for adjusting the light distribution of the third light may be provided separately from the lens holder 20. Further, the optical member 21 is not limited to the lens, and may be a reflective member or the like that reflects the third light in a desired direction, and the form may be appropriately changed according to the emission direction of the third light. can.

Further, in the above 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 the propagation of a part of the third light to the projection lens 15, a through hole may be formed in front of the optical member 21 of the lens holder 20, and the optical member 21 and the projection lens may be formed. A light-shielding member may be provided between the 15 and the 15th. However, the present invention is not limited to the form of suppressing the propagation of the third light to the projection lens 15, and a part of the third light may be incident on the projection lens 15.

Further, it is also conceivable that at least one of the first light source 42, the second light source 52, and the third light source 62 is arranged on another heat sink. 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 arranged on another heat sink.

As described above, according to the present invention, there is provided a headlight for a vehicle which is provided with a plurality of light sources that emit light in different directions and can suppress the increase in size while effectively utilizing the light from these light sources. The vehicle headlights can be used in the field of vehicle headlights such as automobiles.

10 ... Housing 15 ... Projection lens 20 ... Lens holder 21 ... Optical member 22 ... Notch 30 ... Reflector units 31, 32 ... Reflector 31r ... Third reflection Surface 32r ... Fourth reflection surface 35 ... Shade 35a ... First reflection surface 35b ... Second reflection surface 35c ... Front end 42 ... First light source 52 ... Second light source 62 ... Third light source 70 ... Cooling unit 71 ... Heat sink LU ... Lighting unit

Claims (9)

The first light source that emits the first light and
A second light source arranged below the first light source and emitting a second light,
A projection lens arranged in front of the first light source and the second light source and transmitted by the first light and the second light.
A shade that is arranged between the first light source and the second light source and shields a part of the first light,
Equipped with
The shade extends from the first light source side toward the projection lens, and has a concave first reflecting surface that reflects a part of the first light forward and the projection lens from the second light source side. It has a concave second reflective surface that extends toward and reflects a part of the second light forward.
The normal of the exit surface of the first light source points diagonally forward and downward,
Normal of the exit surface of the second light source comes toward the upper forward oblique,
A vehicle headlight, characterized in that the focal point of the projection lens is formed between the front end of the shade and the projection lens. The first light source that emits the first light and
A second light source arranged below the first light source and emitting a second light,
A projection lens arranged in front of the first light source and the second light source and transmitted by the first light and the second light.
A shade that is arranged between the first light source and the second light source and shields a part of the first light,
Equipped with
The shade extends from the first light source side toward the projection lens, and has a concave first reflecting surface that reflects a part of the first light forward and the projection lens from the second light source side. It has a concave second reflective surface that extends toward and reflects a part of the second light forward.
The normal of the exit surface of the first light source points diagonally forward and downward,
Normal of the exit surface of the second light source comes toward the upper forward oblique,
A vehicle headlight, characterized in that, in a vertical cross section, the first light source and the second light source are arranged at positions asymmetrical with respect to the optical axis of the projection lens. The first light source that emits the first light and
A second light source arranged below the first light source and emitting a second light,
A projection lens arranged in front of the first light source and the second light source and transmitted by the first light and the second light.
A shade that is arranged between the first light source and the second light source and shields a part of the first light,
Equipped with
The shade extends from the first light source side toward the projection lens, and has a concave first reflecting surface that reflects a part of the first light forward and the projection lens from the second light source side. It has a concave second reflective surface that extends toward and reflects a part of the second light forward.
The normal of the exit surface of the first light source points diagonally forward and downward,
Normal of the exit surface of the second light source comes toward the upper forward oblique,
At least one of the first light reflected by the first reflecting surface and the second light reflected by the second reflecting surface is made smaller than when the divergence angle is incident and is reflected forward. br /> Vehicle headlights. The first light source that emits the first light and
A second light source arranged below the first light source and emitting a second light,
A projection lens arranged in front of the first light source and the second light source and transmitted by the first light and the second light.
A shade that is arranged between the first light source and the second light source and shields a part of the first light,
A third reflecting surface that covers the upper part of the first light source,
A fourth reflective surface that covers the bottom of the second light source,
Equipped with
The shade extends from the first light source side toward the projection lens, and has a concave first reflecting surface that reflects a part of the first light forward and the projection lens from the second light source side. It has a concave second reflective surface that extends toward and reflects a part of the second light forward.
The normal of the exit surface of the first light source points diagonally forward and downward,
A vehicle headlight characterized in that the normal of the exit surface of the second light source faces diagonally upward forward. The vehicle front according to claim 4 , 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 emitted. Illumination. The first light source that emits the first light and
A second light source arranged below the first light source and emitting a second light,
A projection lens arranged in front of the first light source and the second light source and transmitted by the first light and the second light.
A shade that is arranged between the first light source and the second light source and shields a part of the first light,
Equipped with
The shade extends from the first light source side toward the projection lens, and has a concave first reflecting surface that reflects a part of the first light forward and the projection lens from the second light source side. It has a concave second reflective surface that extends toward and reflects a part of the second light forward.
The normal of the exit surface of the first light source points diagonally forward and downward,
Normal of the exit surface of the second light source comes toward the upper forward oblique,
A vehicle headlight characterized in that the front end of the shade is gradually recessed rearward from the left and right ends toward the center. The first light source that emits the first light and
A second light source arranged below the first light source and emitting a second light,
A projection lens arranged in front of the first light source and the second light source and transmitted by the first light and the second light.
A shade that is arranged between the first light source and the second light source and shields a part of the first light,
Equipped with
The shade extends from the first light source side toward the projection lens, and has a concave first reflecting surface that reflects a part of the first light forward and the projection lens from the second light source side. It has a concave second reflective surface that extends toward and reflects a part of the second light forward.
The normal of the exit surface of the first light source points diagonally forward and downward,
Normal of the exit surface of the second light source comes toward the upper forward oblique,
A vehicle headlight characterized in that a part of the first light emitted in a direction perpendicular to the emission surface of the first light source is directly incident on the front end of the shade. The vehicle headlight according to any one of claims 1 to 7 , wherein at least one of the first light source and the second light source comprises an LED array. The vehicle headlight according to any one of claims 1 to 8 , wherein the shade is composed of one member.

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