JP4234074B2 - Lighting fixtures for vehicles - Google Patents

Description

  The present invention relates to a vehicular illumination lamp using a light emitting element such as a light emitting diode as a light source.

  In recent years, many vehicle lighting lamps using light emitting diodes as light sources have been adopted.

  In that case, “Patent Document 1” describes a vehicular illumination lamp including a plurality of lamp units each using a light emitting diode as a light source. Each lamp unit constituting the vehicular illumination lamp makes light from a light-emitting diode incident on a translucent member disposed in front of the light-emitting diode and guided to the front end face thereof, and emits light from the front end face to the front end face thereof. Irradiating forward through a projection lens arranged in the

  Further, “Patent Document 2” describes a vehicular illumination lamp configured to irradiate light from a plurality of light emitting diodes arranged in a matrix shape forward through a projection lens.

JP 2002-50214 A JP 2001-266620 A

  When the configuration of the vehicular illumination lamp includes only a single lamp unit having a single light-emitting diode as a light source, it is difficult to ensure a sufficient amount of irradiation light. As described in “Document 1”, a plurality of light-emitting diodes are used as a light source of a vehicular illumination lamp as described in “Patent Document 2” or a configuration including a plurality of such lamp units. If the configuration is provided, a sufficient amount of irradiation light can be secured.

  However, in each lamp unit constituting the vehicular illumination lamp described in the above-mentioned “Patent Document 1”, the emitted light from the translucent member is refracted in the direction away from the optical axis of the projection lens at the front end surface thereof. The ratio of the light incident on the projection lens is reduced, and there is a problem that the luminous flux utilization rate for the light from the light emitting diode is low.

  On the other hand, in the vehicular illumination lamp described in the above-mentioned “Patent Document 2”, direct light from each light-emitting diode is made incident on the projection lens. There is a problem that it is low and light irradiation control cannot be performed with high accuracy.

  The present invention has been made in view of such circumstances, and for a vehicular illumination lamp using a light emitting element as a light source, it is possible for a vehicle to perform light irradiation control with high accuracy while increasing the luminous flux utilization factor. The object is to provide an illumination lamp.

  The present invention includes a first lamp unit configured to reflect light from a plurality of light emitting elements forward by a plurality of reflectors and irradiate the light forward through a single projection lens, and the first lamp unit. The above-described object can be achieved by including a predetermined second lamp unit configured to complement the light distribution function of one lamp unit.

That is, the vehicular illumination lamp according to the present invention is:
In the vehicular illumination lamp comprising the first and second lamp units having the light emitting element as a light source,
The first lamp unit includes a first projection lens disposed on a first optical axis extending substantially in the front-rear direction of the lamp and a predetermined interval in the left-right direction on the rear side of the rear focus of the first projection lens. A plurality of first light emitting elements arranged and a plurality of first reflectors that reflect light from each of the first light emitting elements forward and closer to the first optical axis,
The second lamp unit includes a second projection lens disposed on a second optical axis extending substantially in the longitudinal direction of the lamp, and a predetermined interval in the left-right direction on the rear side of the rear focus of the second projection lens. And at least one second light-emitting element disposed at the same time, and at least one second reflector that reflects light from each of the second light-emitting elements forwardly toward the second optical axis,
The direction of the optical axis of each of the first reflectors is set to an orientation in which the first intersection point, which is the intersection point of the optical axis and the rear focal plane of the first projection lens, is arranged at a position separated from each other in the horizontal direction. And
The direction of the optical axis of each of the second reflectors is a horizontal displacement of the second intersection from the second optical axis at the second intersection that is the intersection of the optical axis and the rear focal plane of the second projection lens. The amount is set in a direction to be arranged at a position that is different from the horizontal displacement amount from the first optical axis at each first intersection point.

  The type of the “vehicle lighting lamp” is not particularly limited, and for example, a headlamp, a fog lamp, a cornering lamp, a daytime running lamp, and the like can be employed.

  The “lamp front-rear direction” may or may not match the vehicle front-rear direction.

  The “light-emitting element” means an element-like light source having a light-emitting portion that emits light substantially in a dot shape, and the type thereof is not particularly limited. For example, a light-emitting diode, a laser diode, or the like It can be adopted.

  The “first lamp unit” includes a plurality of first light emitting elements and first reflectors, but the “second lamp unit” does not necessarily include a plurality of second light emitting elements and second reflectors. It is not necessary, and when the first lamp unit has a configuration including two first light emitting elements and a first reflector, a configuration including a single second light emitting element and a second reflector may be adopted.

  The above-mentioned “direction of the optical axis of each first reflector” is not particularly limited as long as each first intersection is set in a direction away from each other in the horizontal direction. .

  The above-mentioned “direction of the optical axis of each second reflector” is a value in which the horizontal displacement amount from each second intersection point is different from the horizontal displacement amount from each first intersection point to the first optical axis. The specific direction is not particularly limited as long as it is set to the direction to be arranged at the position.

  As shown in the above configuration, the vehicular illumination lamp according to the present invention includes first and second lamp units that use light-emitting elements as light sources, and the first lamp unit is a first lamp that extends substantially in the longitudinal direction of the lamp. A first projection lens disposed on the optical axis, a plurality of first light-emitting elements disposed at predetermined intervals in the left-right direction on the rear side of the rear focal point of the first projection lens, and each of the first light-emitting elements; A plurality of first reflectors that reflect light from one light-emitting element forward and closer to the first optical axis, and the second lamp unit is disposed on a second optical axis that extends substantially in the longitudinal direction of the lamp. A second projection lens disposed, at least one second light emitting element disposed at a predetermined interval in the left-right direction behind the rear focal point of the second projection lens, and each of the second light emitting elements. To reflect the light from the front toward the second optical axis Is provided with the at least one second reflector, it is possible to obtain the following effects.

  That is, in the first lamp unit, the light from each first light emitting element is reflected by each first reflector to form a predetermined light source image on the rear focal plane of the first projection lens. By performing reverse projection with the first projection lens, it is possible to form a plurality of first light distribution patterns in a predetermined arrangement and shape while sufficiently increasing the luminous flux utilization factor for the light from each first light emitting element. Further, in the second lamp unit, the light from each second light emitting element is reflected by each second reflector to form a predetermined light source image on the rear focal plane of the second projection lens. By performing reverse projection with the second projection lens, the luminous flux utilization rate for the light from each second light emitting element is sufficiently increased, and a plurality (or a single) second light distribution pattern is formed in a predetermined arrangement and shape. be able to.

  At this time, the direction of the optical axis of each first reflector is set to an orientation in which the first intersection point, which is the intersection point of the optical axis and the rear focal plane of the first projection lens, is arranged at a position separated from each other in the horizontal direction. On the other hand, the direction of the optical axis of each second reflector is such that the second intersection point, which is the intersection point of the optical axis and the rear focal plane of the second projection lens, is separated from the second optical axis of the second intersection point. Since the horizontal displacement amount is set at a position where the horizontal displacement amount is different from the horizontal displacement amount from the first optical axis at each first intersection, the following operational effects can be obtained.

  That is, if the positions of the first intersections are set on the first optical axis, the optical axis of the first reflector located at a position away from the first optical axis is much larger than the first optical axis. Since it forms an angle, it becomes difficult to make the reflected light from the first reflector enter the first projection lens. In order to avoid this, it is necessary to suppress the included angle between the optical axis of each first reflector and the first optical axis to a value equal to or smaller than a certain value. Since it is necessary to secure a space for arranging one reflector, the positions of the first intersections are separated from each other in the horizontal direction to some extent, so that each first light distribution pattern formed by the reflected light from each first reflector is also in the horizontal direction. Are formed at positions separated from each other.

  However, in the present invention, the direction of the optical axis of each second reflector is the second intersection point, and the horizontal displacement of the second intersection point from the second optical axis is the horizontal direction from the first optical axis of each first intersection point. Since the orientation is set to be arranged at a position different from the displacement amount, each second light distribution pattern formed by the reflected light from each second reflector is referred to as a first light distribution pattern adjacent to each other. It can be formed between the first light distribution pattern.

  Therefore, when all of the plurality of first light emitting elements and at least one second light emitting element are simultaneously turned on, the plurality of first light distribution patterns and at least one second light distribution pattern are alternately arranged in the horizontal direction. A horizontally long light distribution pattern can be obtained. At this time, since the first light distribution pattern and the second light distribution pattern adjacent to each other can be partially overlapped, the above-mentioned horizontally long light distribution pattern has no dark portion in the middle portion of the light distribution unevenness. The light distribution pattern can be reduced.

  On the other hand, when any one of the plurality of first light emitting elements and at least one second light emitting element is selectively lit, the first light distribution pattern or the second light distribution pattern in an arbitrary direction according to the selection. Can be formed.

  As described above, according to the present invention, in a vehicle illumination lamp using a light emitting element as a light source, it is possible to perform light irradiation control with high accuracy while increasing the luminous flux utilization factor.

  In the above configuration, if the horizontal displacement amount from the second optical axis of each second intersection point is set to a value obtained by substantially averaging the horizontal displacement amounts from the first optical axis of each of the two adjacent first intersection points, Each of the second light distribution patterns can be formed at a substantially central position between the first light distribution pattern and the first light distribution pattern adjacent to each other, thereby further improving the accuracy of light irradiation control.

  In the above configuration, a first light control member having an upper end edge extending along the rear focal plane of the first projection lens is disposed on the rear side of the first projection lens. If a part of the light from each first light emitting element reflected by one reflector is prevented from going straight and the upwardly emitted light from the first projection lens is removed, each first light distribution pattern is changed to the upper edge. And a light distribution pattern having a sharp cut-off line. On the other hand, a second light control member having an upper end edge extending along the rear focal plane of the second projection lens is disposed on the rear side of the second projection lens, and the second light control member allows each second reflector to If the reflected light from each of the second light emitting elements is prevented from going straight, and the upwardly emitted light from the second projection lens is removed, each second light distribution pattern is clearly displayed at the upper edge. A light distribution pattern having a cut-off line can be obtained. And by employ | adopting such a structure, the visibility in front of a vehicle lighting fixture can be improved, without giving a glare to an oncoming vehicle driver etc. FIG.

  Furthermore, in the above-described configuration, if the lamp front-rear direction is set to a direction inclined outward in the vehicle width direction by a predetermined angle with respect to the vehicle front-rear direction, the formation positions of the first light distribution patterns and the second light distribution patterns are set as a whole. Thus, the vehicle illumination lamp can be made suitable for a cornering lamp or the like.

  Further, in the above configuration, if the first light emitting element and the second light emitting element can be alternately turned on according to the vehicle running condition, light irradiation is performed only in the direction that requires light irradiation. As a result, the power consumption of the vehicular illumination lamp can be minimized.

  At that time, the order of the light emitting elements to be lit is set so that the horizontal displacement amount from the first optical axis of the first intersection point and the horizontal displacement amount from the second optical axis of the second intersection point gradually change. In this case, the first light distribution pattern and the second light distribution pattern can be formed by being shifted little by little in the horizontal direction by switching the lighting, so that the vehicle driver does not feel uncomfortable when turning the vehicle. This makes it possible to improve the front visibility of the vehicle, thereby making the vehicle illumination lamp more suitable for a cornering lamp or the like.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan sectional view showing a vehicular illumination lamp 10 according to an embodiment of the present invention.

  As shown in the figure, the vehicular illumination lamp 10 is a cornering lamp arranged at the right front end of the vehicle, and is configured to irradiate the front in the turning direction when the vehicle turns in the right direction. Yes.

  In this vehicular illumination lamp 10, a first lamp unit 20 and a second lamp unit 40 are arranged in parallel in a lamp chamber formed by a lamp body 12 and a transparent light-transmitting cover 14 attached to a front end opening thereof. It is housed in a state of being arranged in. The front lighting direction of the vehicular lamp 10 is set in a direction inclined at a predetermined angle θ (for example, θ = 30 °) to the right with respect to the front direction of the vehicle. The first optical axis Ax1 of the first lamp unit 20 and the second optical axis Ax2 of the second lamp unit 40 both extend in the front direction of the vehicular illumination lamp 10.

  2 and 3 are a plan view and a side sectional view showing the first lamp unit 20 as a single item, and FIG. 4 is a plan view showing the second lamp unit 40 as a single item.

  As shown in these drawings, the first lamp unit 20 includes a first projection lens 22 disposed on the first optical axis Ax1 and a rear focal point F1 of the first projection lens 22 on the rear side. The three first light emitting elements 24A, 24B, 24C arranged at predetermined intervals in the left-right direction, and the light from each of the first light emitting elements 24A, 24B, 24C forward and closer to the first optical axis Ax1 Three first reflectors 26A, 26B, and 26C to be reflected, and a first light control member 28 having an upper surface 28a configured as a horizontal plane including the first optical axis Ax1.

  Further, the second lamp unit 40 has a second projection lens 42 disposed on the second optical axis Ax2 and a predetermined interval in the left-right direction on the rear side of the rear focal point F2 of the second projection lens 42. And the second light-emitting elements 44D and 44E, and the two second reflectors 46D and 46E that reflect light from the first light-emitting elements 44D and 44E forward and toward the second optical axis Ax2. And a second light control member 48 whose upper surface 48a is configured as a horizontal plane including the second optical axis Ax2.

  Next, the detailed configuration of the first lamp unit 20 will be described.

  The first projection lens 22 is a plano-convex lens having a convex front surface and a flat rear surface, and is fixedly supported by the front end portion of the first light control member 28.

  Each of the first light emitting elements 24A, 24B and 24C is a white light emitting diode having a square light emitting chip 24a having a size of about 0.3 to 3 mm square, and the light emitting chip 24a includes a first optical axis Ax1. In a state of being arranged vertically upward, it is fixed to the upper surface of each light source support recess 28 b formed at the rear end portion of the first light control member 28.

  At this time, the first light emitting element 24B located at the center is disposed on the first optical axis Ax1, and the first light emitting element 24A located on the right side is slightly ahead of the first light emitting element 24B and is located at the first optical axis. The first light emitting element 24C located on the left side is disposed at a position away from Ax1 by a predetermined distance in the right direction, and is disposed at a position symmetrical to the first light emitting element 24A with respect to the first optical axis Ax1.

  The first reflectors 26A, 26B, and 26C are arranged so as to cover the first light emitting elements 24A, 24B, and 24C from the upper side at positions corresponding to the first light emitting elements 24A, 24B, and 24C, respectively. The lower end of the periphery is fixed to the upper surface 28a of the first light control member 28.

  At that time, the optical axis Ab of the first reflector 26B located at the center is set as the same axis as the first optical axis Ax1. The reflecting surface 26a of the first reflector 26B is set so that the cross-sectional shape including the optical axis Ab is substantially elliptical, and the eccentricity is gradually increased from the vertical cross section toward the horizontal cross section. Yes. The first reflector 26B reflects the light from the first light emitting element 24B forward and toward the optical axis Ab so as to be substantially converged at a position near the front of the rear focal point F1 of the first projection lens 22. It is like that.

  The first reflector 26A located on the right side has exactly the same configuration as the first reflector 26B, and its optical axis Aa is set as an axis extending forward by a predetermined angle to the left with respect to the first optical axis Ax1. Yes. The first reflector 26A reflects the light from the first light emitting element 24A forward and toward the optical axis Aa so as to be substantially converged to a position near the front of the rear focal point F1 of the first projection lens 22. It is like that.

  The second reflector 26C located on the left side also has the same configuration as the first reflector 26B, and its optical axis Ac is set to be symmetrical with the optical axis Aa. The first reflector 26C reflects the light from the first light emitting element 24C forward and toward the optical axis Ac so as to substantially converge to a position near the front of the rear focal point F1 of the first projection lens 22. It is like that.

  The upper surface 28a of the first light control member 28 is mirror-finished by aluminum vapor deposition or the like, whereby the upper surface 28a is configured as a reflective surface. The front end edge 28a1 of the upper surface 28a has a portion located on the rear side of the first projection lens 22 extending in a substantially arc shape along the rear focal plane including the rear focal point F1 of the first projection lens 22. Is formed.

  Then, the first light control member 28 prevents a part of the reflected light from the reflecting surface 26a of each of the first reflectors 26A, 26B, and 26C from going straight on the upper surface 28a so as to protrude upward from the first projection lens 22. It is designed to remove light. At this time, since the upper surface 28a of the first light control member 28 is configured as a reflection surface, the reflected light from the first reflectors 26A, 26B, and 26C incident on the upper surface 28a is upward as shown in FIG. Then, the light enters the first projection lens 22 and is emitted as downward light from the first projection lens 22.

  In the first lamp unit 20, the first intersection that is the intersection of the optical axis Ab of the first reflector 26B located at the center and the rear focal plane of the first projection lens 22 is located on the first optical axis Ax1. Therefore, the horizontal displacement from the first optical axis Ax1 at the first intersection is zero. On the other hand, the first reflector 26A located on the right side is displaced by the horizontal displacement amount A in the right direction from the first optical axis Ax1. On the other hand, the first reflector 26C located on the left side is displaced by the same horizontal displacement amount C as the horizontal displacement amount A in the left direction from the first optical axis Ax1.

  Next, the detailed configuration of the second lamp unit 40 will be described.

  The second projection lens 42 has the same configuration as the first projection lens 22 and is fixedly supported on the front end portion of the second light control member 48.

  Each of the second light emitting elements 44D, 44E has the same configuration as each of the first light emitting elements 24A, 24B, 24C, and the light emitting chip 44a is vertically upward on the horizontal plane including the second optical axis Ax2. In such a state, the light source support recesses 48b formed at the rear end of the second light control member 48 are fixed to the upper surface.

  At this time, the second light emitting element 44D located on the right side is disposed at a position away from the second optical axis Ax2 by a predetermined distance in the right direction, and the second light emitting element 44E located on the left side is disposed on the second optical axis Ax2. The second light-emitting element 44D is disposed symmetrically with respect to the second light-emitting element 44D.

  Each of the second reflectors 46D and 46E is disposed at a position corresponding to each of the second light emitting elements 44D and 44E so as to cover each of the second light emitting elements 44D and 44E from above, and the second reflector 46D and 46E The two-light control member 48 is fixed to the upper surface 48a.

  At that time, the second reflector 46D located on the right side has the same configuration as the first reflector 26B, and its optical axis Ad is an axis extending leftward by a predetermined angle with respect to the second optical axis Ax2. Is set. The second reflector 46D reflects the light from the second light emitting element 44D forward and toward the optical axis Ad so as to be substantially converged to a position near the front of the rear focal point F2 of the second projection lens 42. It is like that.

  On the other hand, the second reflector 46E located on the left side also has the same configuration as the first reflector 46B, and its optical axis Ae is set to be symmetrical with the optical axis Ad. The second reflector 46E reflects the light from the second light emitting element 44E forward and toward the optical axis Ae so as to be substantially converged to a position near the front of the rear focal point F2 of the second projection lens 42. It is like that.

  The second light control member 48 has substantially the same configuration as the first light control member 28.

  That is, the upper surface 48a of the second light control member 48 is mirror-finished by aluminum vapor deposition or the like, whereby the upper surface 48a is configured as a reflecting surface. The front edge 48a1 of the upper surface 48a has a portion located on the rear side of the second projection lens 42 extending in a substantially arc shape along the rear focal plane including the rear focal point F2 of the second projection lens 42. Is formed.

  The second light control member 48 prevents a part of the reflected light from the reflecting surface 46a of each of the second reflectors 46D and 46E from going straight on the upper surface 48a so as to emit upward emitted light from the second projection lens 42. Configured to remove. At this time, since the upper surface 48a of the second light control member 48 is configured as a reflecting surface, the reflected light from each of the second reflectors 46D and 46E incident on the upper surface 48a is reflected upward to be the second projection lens. 42 enters and exits from the second projection lens 42 as downward light.

  In the second lamp unit 40, the second reflector 46D located on the right side has a second intersection point, which is the intersection point between the optical axis Ad and the rear focal plane of the second projection lens 42, right from the second optical axis Ax2. The second reflector 46E located on the left side is displaced by the same horizontal displacement amount E as the horizontal displacement amount D from the second optical axis Ax2 to the left. is doing. These horizontal displacement amounts D and E are set to half the horizontal displacement amounts A and C.

  In the vehicular illumination lamp 10 according to the present embodiment, when the vehicle turns to the right, the three first light emitting elements 24A, 24B, 24C of the first lamp unit 20 and the two of the second lamp unit 40 are two. The second light emitting elements 44D and 44E are alternately turned on one by one. At that time, as the turning angle increases to the right, the first light emitting element 24A, the second light emitting element 44D, the first light emitting element 24B, the second light emitting element 44E, and the first light emitting element 24C are turned on one by one. It is configured as follows.

  FIG. 5 shows the vehicle by the irradiation light from the vehicular illumination lamp 10 when the three first light emitting elements 24A, 24B, 24C and the two second light emitting elements 44D, 44E are turned on one by one in the above order. It is a figure which shows the light distribution pattern formed on the virtual vertical screen arrange | positioned in the position of the front 25m.

  A light distribution pattern P1a shown in FIG. 6A is a first light distribution pattern formed when the first light emitting element 24A is turned on, and a light distribution pattern P2d shown in FIG. This is the second light distribution pattern formed when 44D is turned on, and the light distribution pattern P1b shown in FIG. 4C is the first light distribution pattern formed when the first light emitting element 24B is turned on. The light distribution pattern P2e shown in FIG. 4D is a second light distribution pattern formed when the second light emitting element 44E is turned on, and the light distribution pattern P1c shown in FIG. It is the 1st light distribution pattern formed when the light emitting element 24C is lighted.

  These five light distribution patterns P1a, P2d, P1b, P2e, and P1c all have substantially the same shape. That is, each of the light distribution patterns P1a, P2d, P1b, P2e, and P1c is a substantially rectangular light distribution pattern that slightly extends in the horizontal direction, and has a cut-off line CL3 that extends in the horizontal direction at the upper edge. ing. The cut-off line CL3 is formed as a reverse projection image of the front end edge 28a1 of the upper surface 28a of each first light control member 28 or the front end edge 48a1 of the upper surface 48a of each second light control member 48.

  In the first lamp unit 20, the light distribution pattern P1b formed when the first light emitting element 24B located in the center is turned on, as shown in FIG. The light distribution pattern P1a formed when the first light emitting element 24A located on the right side is turned on is formed as shown in FIG. The light distribution pattern P1c formed when the first light emitting element 24C located on the left side is turned on is formed at a position slightly apart on the left side from the light distribution pattern P1b, as shown in FIG. In addition, it is formed at a position slightly away from the light distribution pattern P1b on the right side. At that time, the horizontal displacement amounts of the light distribution patterns P1a and P1c with respect to the light distribution pattern P1b correspond to the horizontal displacement amounts A and C from the first optical axis Ax1 of the first intersections of the first reflectors 26A and 26C. And are equal to each other.

  On the other hand, in the second lamp unit 40, the light distribution pattern P2d formed when the second light-emitting element 44D located on the right side is turned on, as shown in FIG. The light distribution pattern P2e formed between the pattern P1a and the second light emitting element 44E located on the left side is turned on, as shown in FIG. It is formed between the light distribution pattern P1c.

  At that time, the horizontal displacement amount D from the second optical axis Ax2 at the second intersection point of the second reflector 46D is half the horizontal displacement amount A from the first optical axis Ax1 at the first intersection point of the first reflector 26A. Since it is set, the light distribution pattern P2d is formed at the center position so as to straddle the light distribution pattern P1b and the light distribution pattern P1a. Further, the horizontal displacement amount E from the second optical axis Ax2 at the second intersection point of the second reflector 46E is set to a half value of the horizontal displacement amount C from the first optical axis Ax1 at the first intersection point of the first reflector 26C. Therefore, the light distribution pattern P2e is formed at the center position so as to straddle the light distribution pattern P1b and the light distribution pattern P1c.

  In the drawing, a light distribution pattern PL indicated by a two-dot chain line is a low-beam distribution pattern for left light distribution formed by light irradiation from a headlamp (not shown). The light distribution pattern for low beam PL has a horizontal cut-off line CL1 and an oblique cut-off line CL2 at the upper end, and an elbow point E that is the intersection of both cut-off lines is a vanishing point in the vehicle front direction HV It is located slightly below (specifically, about 0.5 to 0.6 ° below). In the low beam light distribution pattern PL, a hot zone HZ is formed so as to surround the elbow point E slightly to the left.

  On the other hand, each of the light distribution patterns P1a, P2d, P1b, P2e, and P1c is formed such that the cut-off line CL3 is positioned at substantially the same height as the horizontal cut-off line CL1. In order to realize this, in the vehicular illumination lamp 10 according to the present embodiment, the directions of the first optical axis Ax1 and the second optical axis Ax2 are slightly downward with respect to the horizontal direction (specifically, 0.5 to 0). It is designed to be attached to the vehicle in a state set to about 6 ° downward.

  As described above in detail, the vehicular illumination lamp 10 according to the present embodiment includes the first and second lamp units 20 and 40 that use light-emitting elements as light sources. The light from one light emitting element 24A, 24B, 24C is reflected by each first reflector 26A, 26B, 26C to form a predetermined light source image on the rear focal plane of the first projection lens 22, and these light source images are Since the first projection lens 22 performs reverse projection, the luminous flux utilization factor for the light from each of the first light emitting elements 24A, 24B, and 24C is sufficiently increased, and the three light distribution patterns P1a, P1b, and P1c are used. The second lamp unit 40 reflects the light from the second light emitting elements 44D and 44E by the second reflectors 46D and 46E, and the second projection lens 40 has a predetermined arrangement and shape. A predetermined light source image is formed on the rear focal plane of 42, and these light source images are inverted and projected by the second projection lens 42, thereby sufficiently increasing the luminous flux utilization factor for the light from the second light emitting elements 44D and 44E. In addition, the two light distribution patterns P2d and P2e can be formed in a predetermined arrangement and shape.

At this time, the directions of the optical axes Aa, Ab, and Ac of the first reflectors 26A, 26B, and 26C are the first intersection points between the optical axes Aa, Ab, and Ac and the rear focal plane of the first projection lens 22. The intersections are set to be arranged at positions separated from each other in the horizontal direction. On the other hand, the directions of the optical axes Ad and Ae of the second reflectors 46D and 46E are the same as those of the optical axes Ad and Ae and the second projection lens. 42, the horizontal displacement amounts D and E from the second optical axis Ax2 of the second intersection point are the horizontal displacement amounts from the first optical axis Ax1 of each first intersection point. Since it is set in an orientation to be arranged at a position having a value different from A, 0, and C, the two light distribution patterns P2d and P2e formed by the reflected light from the second reflectors 46D and 46E are distributed. Pattern P1b and light distribution pattern P1a adjacent to both sides thereof It can be respectively formed between the P1c,
Therefore, by selectively lighting one of the first light emitting elements 24A, 24B, 24C and the second light emitting elements 44D, 44E, five directions centered on the front direction of the lamp are selected according to the selection. A light distribution pattern can be formed on any of the above.

  Thus, according to the present embodiment, it is possible to perform light irradiation control with high accuracy while increasing the luminous flux utilization factor.

  Particularly in the present embodiment, the horizontal displacement D of the second intersection of the second reflector 46D located on the right side in the second lamp unit 40 is equal to the first intersection of the first reflector 26A located on the right side in the first lamp unit 20. The horizontal displacement amount E of the second intersection of the second reflector 46E located on the left side in the second lamp unit 40 is set to the left side in the first lamp unit 20. Since the horizontal displacement amount C of the first intersection point of the first reflector 26C is set to a half value, the light distribution patterns P2d and P2e formed by the reflected light from the second reflectors 46D and 46E are The light distribution pattern P1b and the light distribution patterns P1a and P1c adjacent to both sides of the light distribution pattern P1b can be formed at the center positions, respectively, thereby further improving the light irradiation control. It is possible to carry out clause.

  Further, in the present embodiment, the first lamp unit 20 includes the first light control member 28 having the upper surface 28a configured as a horizontal plane including the first optical axis Ax1, and the front edge 28a1 of the upper surface 28a is the first edge 28a1. Since the projection lens 22 is formed so as to extend along the rear focal plane, the first light control elements 28 reflect the first light emitting elements 24A, 24B reflected by the first reflectors 26A, 26B, 26C. , 24C to prevent a part of the light from going straight, and to remove the upwardly emitted light from the first projection lens 22. And thereby, each light distribution pattern P1a, P1b, P1c can be made into the light distribution pattern which has the clear cut-off line CL3 in an upper end edge, and without giving glare to an oncoming vehicle driver by this, vehicle front Visibility can be improved. Moreover, since the upper surface 28a of the first light control member 28 is configured as a reflecting surface, the reflected light from the first reflectors 26A, 26B, and 26C incident on the upper surface 28a is also reflected by the light distribution patterns P1a, P1b, It can be used to form P1c, whereby the luminous flux utilization rate for the light from each of the first light emitting elements 24A, 24B, 24C can be further increased.

  Similarly to the first lamp unit 20, the second lamp unit 40 also includes a second light control member 48 having an upper surface 48a configured as a horizontal plane including the second optical axis Ax2, and a front edge 48a1 of the upper surface 48a is provided. Since it is formed so as to extend along the rear focal plane of the second projection lens 42, the second light control member 48 causes the first light emitting elements 44D and 44E reflected by the second reflectors 46D and 46E. Therefore, it is possible to prevent the light emitted upward from the second projection lens 42 from being prevented from traveling straight. And thereby, each light distribution pattern P2d and P2e can be made into the light distribution pattern which has the clear cut-off line CL3 in an upper end edge, and, thereby, the visibility ahead of a vehicle, without giving a glare to an oncoming vehicle driver Can be increased. Moreover, since the upper surface 48a of the second light control member 48 is configured as a reflective surface, the reflected light from the second reflectors 46D and 46E incident on the upper surface 48a also forms the light distribution patterns P2d and P2e. Therefore, the luminous flux utilization factor for the light from the second light emitting elements 44D and 44E can be further increased.

  Further, in the vehicular illumination lamp 10 according to the present embodiment, since the lamp front-rear direction is set in a direction inclined outward by a predetermined angle in the vehicle width direction with respect to the vehicle front-rear direction, each light distribution pattern P1a, P1b, P1c , P2d, and P2e can be displaced in a direction that is inclined outward in the vehicle width direction with respect to the front direction of the vehicle as a whole, thereby making the vehicular illumination lamp 10 suitable for a cornering lamp. Can do.

  6 and 7 are perspective views of a light distribution pattern formed on a virtual vertical screen disposed at a position 25 m ahead of the lamp by light irradiated forward from the vehicular illumination lamp 10 together with a low beam light distribution pattern PL. FIG. At that time, FIG. 6 shows a state in which the light distribution pattern is sequentially switched when turning right at the front intersection when traveling on a straight road, and FIG. 7 shows an operation for increasing steering to the right when traveling on a curved road. It is shown that the light distribution pattern is sequentially switched during the operation.

  In the vehicular illumination lamp 10 according to the present embodiment, when the vehicle turns to the right, the first light emitting element 24A → second light emitting element 44D → first light emitting element 24B → first as the turning angle increases. Since the two light emitting elements 44E and the first light emitting element 24C are turned on one by one in the order, the light distribution pattern P1a → the light distribution pattern P2d → the light distribution pattern P1b → the light distribution pattern P2e → the light distribution pattern P1c. In order, the formation position of the light distribution pattern can be moved to the right. In addition, since these five light distribution patterns P1a, P2d, P1b, P2e, and P1c are partially overlapped with each other, the formation positions of the light distribution patterns can be gradually changed. As a result, the forward visibility during turning of the vehicle can be enhanced without causing the driver of the vehicle to feel uncomfortable.

  In the above-described embodiment, the first lamp unit 20 and the second lamp unit 40 are described as being configured separately. However, it is also possible to configure them integrally.

  Moreover, in the said embodiment, the 1st lamp unit 20 is comprised so that each 1st light emitting element 24A, 24B, 24C arrange | positioned upward may be covered from each upper side by each 1st reflector 26A, 26B, 26C. Of course, it is possible to adopt other configurations. The same applies to the second lamp unit 40.

  Further, in the above embodiment, the light emitting chips 24a of the first light emitting elements 24A, 24B, and 24C and the light emitting chips 44a of the second light emitting elements 44D and 44E are formed in a square having a size of about 0.3 to 3 mm square. Although described as being formed, it is also possible to use one formed in an outer shape other than this (for example, a horizontally long rectangular shape).

  Further, in the above embodiment, the first light control member 28 has the upper surface 28a configured as a horizontal plane including the first optical axis Ax1, and the front edge 28a1 is the rear focal point of the first projection lens 22. Although described as being formed so as to extend along the surface, instead of being configured in this way, it is a standing wall-shaped shade formed so that the upper end edge extends in a substantially arc shape along the rear focal plane. It is also possible to constitute the first light control member. The same applies to the second light control member.

  The vehicular illumination lamp 10 according to the above embodiment is configured to turn on the three first light emitting elements 24A, 24B, 24C and the two second light emitting elements 44D, 44E one by one. It can also be configured to be lit.

  For example, the first light emitting element 24A and the second light emitting element 44D → the second light emitting element 44D and the first light emitting element 24B → the first light emitting element 24B and the second light emitting element 44E → the second light emitting element 44E and the first light emitting element 24C. If two lights are turned on in order, as shown in FIG. 8, the light distribution pattern P1a, P2d → light distribution pattern P2d, P1b → light distribution pattern P1b, P2e → light distribution pattern P2e, P1c, The formation position of the light distribution pattern can be moved in the right direction. In this case, since the light distribution pattern can be switched after irradiating the road surface in front of the vehicle relatively widely, the vehicle driver does not feel uncomfortable when turning the vehicle. The forward visibility can be further enhanced.

  It is also possible to light these three first light emitting elements 24A, 24B, 24C and two second light emitting elements 44D, 44E simultaneously.

  In addition, in the said embodiment, although the case where the vehicle lamp 10 was a cornering lamp arrange | positioned at the vehicle right front end part was demonstrated, also when it is a cornering lamp arrange | positioned at a vehicle left front end part, If it is set as the left-right symmetrical structure with the vehicle lighting device 10, the effect similar to the said embodiment can be acquired.

  Further, in order to make the vehicular illumination lamp 10 according to the above-described embodiment suitable for a cornering lamp, the lamp front-rear direction is set in a direction inclined outward in the vehicle width direction by a predetermined angle with respect to the vehicle front-rear direction. As described above, it is of course possible to use the vehicular illumination lamp 10 in a state in which the vehicular illumination lamp 10 is directed toward the front of the vehicle.

  In this way, the lamp front-rear direction of the vehicular illumination lamp 10 is set to the vehicle front-rear direction, and the three first light-emitting elements 24A, 24B, 24C and the two second light-emitting elements 44D, 44E are turned on simultaneously. In this case, as shown in FIG. 9, the three light distribution patterns P1a, P1b, P1c and the two light distribution patterns P2d, P2e are arranged at approximately equal intervals in the horizontal direction so as to be partially overlapped. Therefore, as the combined light distribution pattern, it is possible to obtain a horizontally long light distribution pattern with no dark portion in the middle portion and less light distribution unevenness.

  Thus, the vehicular illumination lamp 10 can be used as a fog lamp or the like. At this time, if this is turned on simultaneously with the headlamp, the brightness of the diffusion region of the low beam light distribution pattern PL is effectively reinforced by the five light distribution patterns P1a, P1b, P1c, P2d, and P2e. be able to. Further, the vehicular illumination lamp 10 can be configured as a part of a headlamp.

Plan sectional drawing which shows the illumination lamp for vehicles which concerns on one Embodiment of this invention The top view which shows the 1st lamp unit of the said vehicle lighting lamp with the single item Side sectional view showing the first lamp unit as a single item The top view which shows the 2nd lamp unit of the said vehicle lighting lamp with the single item When each of the first light emitting elements of the first lamp unit and each of the second light emitting elements of the second lamp unit are turned on one by one in a predetermined order, the light emitted from the vehicle lighting lamps The figure which shows the light distribution pattern formed on the virtual vertical screen arrange | positioned in the position FIG. 7 is a perspective view showing a light distribution pattern formed on the virtual vertical screen by light radiated forward from the vehicle illumination lamp together with a light distribution pattern for a low beam, and is turned right at a front intersection when traveling on a straight road. Showing how the light distribution pattern changes sequentially when FIG. 6 is a view similar to FIG. 6 showing a state in which the light distribution pattern is sequentially switched when the steering wheel is turned to the right while driving on a curved road. A light distribution pattern formed on the virtual vertical screen when each of the first light emitting elements of the first lamp unit and each of the second light emitting elements of the second lamp unit are turned on in a predetermined order. Illustration The figure which shows perspectively the light distribution pattern formed on the said virtual vertical screen with the light irradiated ahead from the vehicle lighting device which concerns on the modification of the said embodiment with the light distribution pattern for low beams

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle illumination lamp 12 Lamp body 14 Translucent cover 20 1st lamp unit 22 1st projection lens 24A, 24B, 24C 1st light emitting element 24a, 44a Light emitting chip 26A, 26B, 26C 1st reflector 26a, 46a Reflecting surface 28 First light control member 28a, 48a Upper surface 28a1, 48a1 Front end edge 28b, 48b Light source support recess 40 Second lamp unit 42 Second projection lens 44D, 44E Second light emitting element 46D, 46E Second reflector 48 Second light control member A , C, D, E Horizontal displacement Aa, Ab, Ac, Ad, Ae Optical axis Ax1 First optical axis Ax2 Second optical axis CL1 Horizontal cut-off line CL2 Oblique cut-off line CL3 Cut-off line E Elbow point F1, F2 Rear focus HZ hot zone P1a, P1b, P1c, P2d A light distribution pattern for P2e light distribution pattern PL low-beam

Claims (5)

In the vehicular illumination lamp comprising the first and second lamp units having the light emitting element as a light source,
The first lamp unit includes a first projection lens disposed on a first optical axis extending substantially in the front-rear direction of the lamp and a predetermined interval in the left-right direction on the rear side of the rear focus of the first projection lens. A plurality of first light emitting elements arranged and a plurality of first reflectors that reflect light from each of the first light emitting elements forward and closer to the first optical axis,
The second lamp unit includes a second projection lens disposed on a second optical axis extending substantially in the longitudinal direction of the lamp, and a predetermined interval in the left-right direction on the rear side of the rear focus of the second projection lens. And at least one second light-emitting element disposed at the same time, and at least one second reflector that reflects light from each of the second light-emitting elements forwardly toward the second optical axis,
The direction of the optical axis of each of the first reflectors is set to an orientation in which the first intersections, which are the intersections of the optical axis and the rear focal plane of the first projection lens, are arranged at positions separated from each other in the horizontal direction. And
The direction of the optical axis of each of the second reflectors is a horizontal displacement from the second optical axis of the second intersection, which is the intersection of the optical axis and the rear focal plane of the second projection lens. A vehicular illumination lamp, wherein the amount is set in a direction to be arranged at a position different from a horizontal displacement amount from the first optical axis at each first intersection.   The horizontal displacement amount from the second optical axis of each of the second intersection points is set to a value obtained by substantially averaging the horizontal displacement amounts of the two adjacent first intersection points from the first optical axis. The vehicular illumination lamp according to claim 1. A first light control member whose upper end edge extends along the rear focal plane of the first projection lens is disposed on the rear side of the first projection lens. A part of the light from each of the first light emitting elements reflected by the reflector is prevented from going straight, and the upward outgoing light from the first projection lens is removed;
A second light control member having an upper end extending along the rear focal plane of the second projection lens is disposed on the rear side of the second projection lens. The light emitted from each of the second light emitting elements reflected by the reflector is prevented from going straight, and the upward outgoing light from the second projection lens is removed. The vehicle lighting device according to 1 or 2.   The vehicular illumination lamp according to any one of claims 1 to 3, wherein the front-rear direction of the lamp is set in a direction inclined outward in the vehicle width direction by a predetermined angle with respect to the front-rear direction of the vehicle.   5. The vehicle according to claim 1, wherein each of the first light emitting elements and each of the second light emitting elements can be alternately turned on in accordance with a vehicle traveling state. Lighting lamp.

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