JP2018198168A - Lamp for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the brightness of a low beam light distribution pattern in a projector-type vehicular lamp provided with a reflector. A low-beam light distribution pattern having horizontal and oblique cut-off lines CL1 and CL2 as an aggregate of projected images I1 to I4 of an upward light emitting surface 14a formed by light from a light emitting element 14 reflected by a reflector 16. PL1 is formed. At that time, the first reflection region Z1 for forming the horizontal cutoff line CL1 on the reflection surface 16a of the reflector 16 has a reflection surface shape formed so that the position of the upper edge of the projection image I1 is aligned on the same horizontal line. Further, the second reflection region Z2 for forming the oblique cut-off line CL2 is formed so that the position of the upper edge of the projection image I2 is aligned in the same inclined line direction extending in the direction inclined with respect to the horizontal line. Shape. As a result, the low beam light distribution pattern PL1 can be formed without using a shade or a mirror member. [Selection] Figure 5

Description

  The present invention relates to a projector-type vehicular lamp provided with a reflector.

  2. Description of the Related Art Conventionally, a projector-type vehicular lamp configured to make light from a light source reflected by a reflector enter a projection lens is known.

  In “Patent Document 1”, in such a vehicular lamp, a light distribution pattern for low beam is formed by shielding a part of the reflected light from the reflector by a shade arranged behind the projection lens. What has been configured is described.

  In addition, in “Patent Document 2”, in a projector-type vehicular lamp using a light emitting element as a light source, a mirror member having an upward reflecting surface that reflects part of the reflected light upward from the reflector is disposed instead of the shade. The described configuration is described.

JP 2005-216520 A JP 2014-203513 A

  By using a configuration including a mirror member as in the vehicle lamp described in the above-mentioned “Patent Document 2”, it is possible to effectively use light from the light emitting element.

  However, even when such a configuration is adopted, a part of the reflected light from the reflector is reflected by the upward reflecting surface of the mirror member and then enters the projection lens. The rate becomes low, and the brightness of the light distribution pattern for low beam cannot be increased.

  The present invention has been made in view of such circumstances, and provides a vehicular lamp that can increase the brightness of a low-beam light distribution pattern in a projector-type vehicular lamp that includes a reflector. It is for the purpose.

  The present invention is intended to achieve the above object by devising the configuration of the reflector.

That is, the vehicular lamp according to the present invention is
In a vehicular lamp comprising a projection lens, a light emitting element disposed behind the projection lens, and a reflector that reflects light from the light emitting element toward the projection lens,
The light emitting element is arranged with the light emitting surface of the light emitting element facing upward,
The reflector has a light distribution pattern for low beam having horizontal and oblique cut-off lines as an aggregate of projection images of the light emitting surface formed by light from the light emitting element reflected by the reflector and transmitted through the projection lens. Configured to form,
The reflector includes a first reflective region for forming the horizontal cutoff line, and a second reflective region for forming the oblique cutoff line,
The first reflective region has a reflective surface shape formed so that the position of the upper edge of the projected image of the light emitting surface is aligned on the same horizontal line,
The second reflection region has a reflection surface shape formed so as to align the position of the upper edge of the projection image of the light emitting surface in the same inclined line direction extending in a direction inclined with respect to the horizontal line. It is a feature.

  The above “light emitting element” is arranged with its light emitting surface facing upward. At that time, the light emitting surface may be directed vertically upward or may be directed in a direction inclined with respect to the vertical upward direction. Good.

  The specific shape, size, etc. of the “light emitting surface” are not particularly limited.

  If the “first reflective region” has a reflective surface shape formed so that the position of the upper edge of the projected image of the light emitting surface is aligned on the same horizontal line, its specific arrangement, size, etc. It is not particularly limited.

  If the "second reflection region" has a reflection surface shape formed so as to align the position of the upper edge of the projection image of the light emitting surface in the same inclined line direction extending in the direction inclined with respect to the horizontal line, The specific arrangement, size, etc. are not particularly limited. At that time, the specific inclination angle with respect to the horizontal line in the “same inclination line direction” is not particularly limited.

  In the vehicular lamp according to the present invention, a reflector that reflects light from a light emitting element having an upward light emitting surface is projected on a light emitting surface formed by light from the light emitting element reflected by the reflector and transmitted through a projection lens. A low beam light distribution pattern having horizontal and oblique cut-off lines is formed as an aggregate of images. In this case, the reflector includes a first reflection area and a diagonal cut-off line for forming a horizontal cut-off line. And a second reflection region having a reflection surface shape formed so that the position of the upper edge of the projected image of the light emitting surface is aligned on the same horizontal line, and the second reflection region. The region has a reflecting surface shape formed so that the position of the upper edge of the projected image of the light emitting surface is aligned in the same inclined line direction extending in the direction inclined with respect to the horizontal line. Since it is, it is possible to obtain the following effects.

  That is, the vehicular lamp according to the present invention has a configuration in which the reflected light from the reflector is directly incident on the projection lens, so that the luminous flux utilization factor can be maximized. At that time, the light emitting element as the light source can be configured so that the outline of the light emitting surface is clearly formed, so that the horizontal and oblique cut-off lines are clearly formed by aligning the position of the upper edge of the projected image. can do. Therefore, a low beam light distribution pattern having horizontal and oblique cutoff lines can be formed as a bright light distribution pattern without using a shade or a mirror member.

  As described above, according to the present invention, the brightness of the low beam light distribution pattern can be increased in the projector-type vehicular lamp including the reflector.

  In addition, by adopting the configuration of the present invention, the conventional shade and mirror members can be eliminated, so that the cost can be reduced, and the shade is also collected by the sunlight condensing action by the projection lens. It is possible to prevent the mirror member from being inadvertently melted.

  In the above configuration, the light-emitting element has a rectangular outer shape in which the light-emitting surface is elongated in the front-rear direction, and the first reflective region is located in the vicinity of the lower end edge of the reflector and the second reflective region is the first. If it is the structure located in the upper vicinity of a reflective area | region, the following effects can be acquired.

  That is, when the light emitting surface has a rectangular outer shape extending in the front-rear direction, the projected image of the light emitting surface formed by the reflected light from the first reflection region located near the lower end edge of the reflector is horizontally long. Since it has a rectangular outer shape, it is possible to easily align the position of the upper edge on the same horizontal line.

  In addition, since the projection image of the light emitting surface formed by the reflected light from the second reflecting region located near the upper side of the first reflecting region has a rectangular outer shape extending obliquely, It is possible to easily align the positions in the same inclined line direction.

  Accordingly, the horizontal and oblique cutoff lines can be formed relatively clearly by the reflected light from the first and second reflection regions.

  On the other hand, in the above configuration, the light emitting surface has a rectangular outer shape extending in the left-right direction as the light emitting element, and as the reflector, the first reflective region is positioned above the light emitting surface and the second reflective region is the first reflective region. If the configuration is located near the side of one reflection region, the following operational effects can be obtained.

  That is, when the light emitting surface has a rectangular outer shape extending in the left-right direction, the projected image of the light emitting surface formed by the reflected light from the first reflecting region located above the light emitting surface is a horizontally long rectangle. Since the outer shape of the shape is obtained, it is possible to easily align the position of the upper edge on the same horizontal line. In addition, the projected image of the light emitting surface formed by the reflected light from the second reflecting region located in the vicinity of the side of the first reflecting region has a rectangular outer shape extending in an oblique direction. Can be easily aligned in the same inclined line direction. Accordingly, the horizontal and oblique cutoff lines can be formed relatively clearly by the reflected light from the first and second reflection regions.

  In the configuration described above, the second light emitting element and the second reflector that reflects the light from the second light emitting element toward the projection lens are provided, and the second reflector is reflected by the second reflector. As a set of projection images of the light emitting surface formed by the light from the second light emitting element transmitted through the projection lens, a high beam additional light distribution pattern straddling the horizontal and oblique cutoff lines in the vertical direction is formed. If configured, the following effects can be obtained.

  That is, by additionally lighting the second light emitting element with respect to the light emitting element, the high beam light distribution pattern can be formed as a combined light distribution pattern of the low beam light distribution pattern and the high beam additional light distribution pattern.

  In addition, the beam switching between the low beam and the high beam can be performed by a simple configuration in which the on / off control of the second light emitting element is simply performed without using the movable shade and the like to perform the drive control as in the prior art. It can be performed.

  At this time, if the second light emitting element is arranged with the light emitting surface facing downward below the light emitting element, the second reflector can be disposed upside down with respect to the reflector. Thus, the vehicular lamp can be configured compactly.

Side sectional view which shows the vehicle lamp which concerns on one Embodiment of this invention. II direction view of FIG. III-III sectional view of FIG. The figure which shows the light distribution pattern for low beams formed with the irradiation light from the said vehicle lamp (A) is a figure which shows the some projection image which comprises the said light distribution pattern for low beams, (b) is a front view which shows the reflector of the said vehicle lamp with a light emitting element. The same figure as FIG. 1 which shows the 1st modification of the said embodiment. The same figure as FIG. 3 which shows the said 1st modification. The same figure as FIG. 5 for demonstrating the effect | action of the said 1st modification. The same figure as FIG. 1 which shows the 2nd modification of the said embodiment. The same figure as FIG. 4 which shows the effect | action of the said 2nd modification.

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

  FIG. 1 is a side sectional view showing a vehicular lamp 10 according to an embodiment of the present invention. 2 is a view taken in the direction of arrow II in FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III in FIG.

  In these drawings, the direction indicated by X is “front” as a lamp (“forward” as a vehicle), the direction indicated by Y is “right”, and the direction indicated by Z is “upward”. The same applies to other figures.

  As shown in these drawings, the vehicular lamp 10 according to the present embodiment is configured as a projector-type lamp unit used in a state of being incorporated as a part of a headlamp.

  That is, the vehicular lamp 10 includes a projection lens 12, a light emitting element 14 as a light source arranged behind the rear focal point F of the projection lens 12, and light emitted from the light emitting element 14. And a reflector 16 that reflects toward the light source 12.

  The projection lens 12 is a plano-convex aspheric lens having a convex front surface and a flat rear surface, and a light source image formed on the rear focal plane, which is a focal plane including the rear focal point F, as a reverse image in front of the lamp. It is designed to project onto a virtual vertical screen. The projection lens 12 is supported by the lens holder 18 at the outer peripheral flange portion, and the lens holder 18 is supported by the base member 20.

  The light emitting element 14 is a white light emitting diode, and has a light emitting surface 14a having a rectangular shape (specifically, a rectangular shape whose front and rear width is twice or more as large as the left and right width) extending in the front and rear direction in plan view. The light emitting element 14 has its light emitting surface 14a vertically upward substantially on the optical axis Ax (specifically, the light emission center of the light emitting surface 14a is located slightly below the optical axis Ax). It is arranged in the state.

  The reflector 16 is disposed so as to cover the light emitting element 14 from above, and is supported by the base member 20 at the lower end edge thereof.

  The reflecting surface 16a of the reflector 16 has a reflecting surface shape formed with an ellipsoid having a light emission center of the light emitting surface 14a of the light emitting element 14 as a first focal point as a reference surface.

  Specifically, the elliptical surface serving as the reference surface has an elliptical cross-sectional shape including the optical axis Ax, and the eccentricity is set to gradually increase from the vertical cross section toward the horizontal cross section. In the vertical cross section, the rear focal point F of the projection lens 12 is the second focal point.

  The reflector 16 is configured to form a low beam light distribution pattern as an aggregate of projection images of the light emitting surface 14a formed by light from the light emitting element 14 reflected by the reflecting surface 16a and transmitted through the projection lens 12. Has been.

  FIG. 4 is a perspective view of the low beam light distribution pattern PL1 formed on the virtual vertical screen disposed at a position 25 m ahead of the vehicle by the front irradiation light from the vehicle lamp 10.

  This low beam light distribution pattern PL1 is a left light distribution low beam light distribution pattern that extends in the left-right direction around the VV line passing through the HV, which is a vanishing point in the front direction of the lamp, in the vertical direction. It has horizontal and oblique cut-off lines CL1, CL2 at its upper edge.

  The horizontal cut-off line CL1 constitutes a cut-off line extending in the horizontal direction on the right side (that is, the opposite lane side) from the VV line, and the oblique cut-off line CL2 is located on the left side (that is, the own lane side) from the VV line. ), The elbow point E, which is a connecting point, is positioned about 0.5 to 0.6 ° below HV. At this time, the oblique cutoff line CL2 extends at an inclination angle of about 10 to 30 ° (for example, about 15 °) with respect to the horizontal cutoff line CL1.

  In the low beam light distribution pattern PL1, a hot zone HZL that is a high luminous intensity region is formed so as to surround the elbow point E slightly to the left.

  FIG. 5A is a diagram showing a plurality of projection images I1, I2, I3, and I4 constituting the low beam light distribution pattern PL1. FIG. 5B is a front view showing the reflector 16 together with the light emitting element 14.

  As shown in FIG. 5A, the low beam light distribution pattern PL1 is formed as a combined light distribution pattern of the first to third light distribution patterns P1 to P3 and the other fourth light distribution pattern P4. .

  On the other hand, as shown in FIG.5 (b), the reflective surface 16a of the reflector 16 is comprised by the 1st-4th reflective area | regions Z1-Z4.

  The first light distribution pattern P1 is formed as an aggregate of the projection images I1 of the light emitting surface 14a formed by the reflected light from the first reflection region Z1, and the second light distribution pattern P2 is formed in the second reflection region Z2. The third light distribution pattern P3 is formed as an aggregate of the projection image I3 of the light emitting surface 14a formed by the reflected light from the third reflection region Z3. The fourth light distribution pattern P4 is formed as an aggregate, and is formed as an aggregate of the projection images I4 of the light emitting surface 14a formed by the reflected light from the fourth reflection region Z4.

  The first reflection region Z1 is located in the vicinity of the lower end edge of the reflector 16 on the left side of the optical axis Ax (right side when viewed from the front of the lamp, the same applies hereinafter). At this time, the first reflection region Z1 is set as a region extending in a band shape from the position slightly away from the optical axis Ax to the left side to the front edge of the reflector 16 in the left direction.

  The projected image I1 of the light emitting surface 14a formed by the reflected light from the first reflective region Z1 has a rectangular outer shape in which the light emitting surface 14a of the light emitting element 14 extends in the front-rear direction, and therefore is substantially horizontal. It has a laterally long rectangular outer shape that is elongated in the direction.

  Therefore, by setting the reflection surface shape of the first reflection region Z1 so that the upper edge of the projection image I1 formed by the reflected light from each position of the first reflection region Z1 is aligned in the same horizontal direction, the projection image A first light distribution pattern P1 whose upper end edge extends in the horizontal direction is formed as an aggregate of I1, and a horizontal cutoff line CL1 is formed by the upper end edge.

  The second reflection area Z2 is located on the left side of the optical axis Ax and in the vicinity of the upper side of the first reflection area Z1. At this time, the second reflection area Z2 is set as an area extending so as to extend to the front edge of the reflector 16 in the left direction so as to be adjacent to the upper side of the first reflection area Z1.

  Since the projection image I2 of the light emitting surface 14a formed by the reflected light from the second reflective region Z2 has a rectangular outer shape in which the light emitting surface 14a of the light emitting element 14 extends in the front-rear direction, the oblique direction It has a rectangular outer shape extending in the direction.

  Therefore, by setting the reflecting surface shape of the second reflecting region Z2 so that the upper edge of the projected image I2 formed by the reflected light from each position of the second reflecting region Z2 is aligned in the same inclination line direction, the projection is performed. A second light distribution pattern P2 whose upper end edge extends in an oblique direction is formed as an aggregate of the images I2, and an oblique cut-off line CL2 is formed by the upper end edge.

  At this time, since the second reflection region Z2 is located on the left side of the optical axis Ax, the projection image I2 is originally (that is, when the reflection surface 16a remains the reference surface) V. Although it is formed below the projection image I1 on the right side of the −V line, it is formed in a state of being displaced to the left side of the VV line by appropriately deforming the surface shape of the second reflection region Z2. It has become. Since the surface shape of the second reflection region Z2 is greatly deformed from the reference surface as described above, the second reflection region Z2 is located at the boundary line between the second reflection region Z2 and the first and fourth reflection regions Z1 and Z4. A step will be formed.

  The third reflection region Z3 is located near the lower end edge of the reflector 16 on the right side of the optical axis Ax. At this time, the third reflection region Z3 is set as a region extending in a band shape from the position slightly away to the right side from the optical axis Ax to the front end edge of the reflector 16 in the right direction.

  The projection image I3 of the light emitting surface 14a formed by the reflected light from the third reflection region Z3 also has a laterally long rectangular outer shape extending elongated in a substantially horizontal direction.

  Therefore, the third reflection is performed so that the upper end edge of the projection image I3 formed by the reflected light from each position of the third reflection region Z3 is positioned above the horizontal cutoff line CL1 on the left side of the oblique cutoff line CL2. The shape of the reflective surface of the region Z3 is set. As a result, a third light distribution pattern P3 that reinforces the brightness of the region located on the left side of the oblique cutoff line CL2 is formed as an aggregate of the projected images I3.

  The projection image I4 of the light emitting surface 14a formed by the reflected light from the fourth reflective region Z4 (that is, the reflective region other than the first to third reflective regions Z1 to Z3 on the reflective surface 16a) is the first to first aggregates. A fourth light distribution pattern P4 extending in the left-right direction is formed below the third light distribution patterns P1 to P3.

  In the fourth reflection area Z4, the projection image I4 of the light emitting surface 14a formed by the reflected light from the reflection area that is symmetrical to the second reflection area Z2 with respect to the optical axis Ax is bright in the hot zone HL. It is formed at a position to reinforce the thickness.

  Next, the effect of this embodiment is demonstrated.

  In the vehicular lamp 10 according to this embodiment, a reflector 16 that reflects light from a light emitting element 14 having an upward light emitting surface 14 a is reflected by the reflecting surface 16 a of the reflector 16 and is transmitted through the projection lens 12. 14 is configured to form a low-beam light distribution pattern PL1 having horizontal and oblique cutoff lines CL1 and CL2 as an aggregate of projection images I1, I2, I3, and I4 of the light emitting surface 14a formed by light from 14. In this case, the reflection surface 16a of the reflector 16 includes a first reflection region Z1 for forming the horizontal cutoff line CL1 and a second reflection region Z2 for forming the oblique cutoff line CL2. The region Z1 has a reflecting surface shape formed so that the position of the upper edge of the projected image I1 of the light emitting surface 14a is aligned on the same horizontal line. In addition, the second reflection region Z2 has a reflection surface shape formed so that the position of the upper edge of the projection image I2 of the light emitting surface 14a is aligned in the same inclined line direction extending in the direction inclined with respect to the horizontal line. The following effects can be obtained.

  That is, since the vehicular lamp 10 according to the present embodiment is configured to cause the reflected light from the reflector 16 to enter the projection lens 12 as it is, the luminous flux utilization factor can be maximized. At that time, since the light emitting element 14 as the light source has a clear outline of the light emitting surface 14a, the horizontal and oblique cut-off lines CL1 and CL2 are made clear by aligning the positions of the upper edges of the projected images I1 and I2, respectively. Can be formed. Therefore, the low beam light distribution pattern PL1 having the horizontal and oblique cutoff lines CL1 and CL2 can be formed as a bright light distribution pattern without using a shade or a mirror member.

  As described above, according to the present embodiment, the brightness of the low beam light distribution pattern PL1 can be increased in the projector-type vehicular lamp 10 including the reflector 16.

  In addition, by adopting the configuration of the present embodiment, the conventional shade and mirror members can be abolished, so that the cost can be reduced by that amount, and the sunlight condensing action by the projection lens 12 can be achieved. Therefore, it is possible to prevent the shade and the mirror member from being inadvertently melted.

  In the vehicular lamp 10 according to the present embodiment, the light emitting surface 14a of the light emitting element 14 has a rectangular outer shape that is elongated in the front-rear direction. On the reflector 16, the first reflective region Z1 is the reflector 16. Since the second reflection region Z2 is positioned in the vicinity of the upper portion of the first reflection region Z1, the following effects can be obtained.

  That is, when the light emitting surface 14a has a rectangular outer shape extending in the front-rear direction, the light emitting surface 14a formed by the reflected light from the first reflecting region Z1 located near the lower end edge of the reflector 16 is used. Since the projected image I1 has a laterally long rectangular outer shape, it is possible to easily align the position of the upper edge on the same horizontal line.

  Further, since the projection image I2 of the light emitting surface 14a formed by the reflected light from the second reflection region Z2 located near the upper portion of the first reflection region Z1 has a rectangular outer shape extending in an oblique direction, It becomes easy to align the position of the upper edge in the same inclined line direction.

  Therefore, the horizontal and oblique cut-off lines CL1 and CL2 can be formed relatively clearly by the reflected light from the first and second reflection regions Z2.

  In the above embodiment, the vehicular lamp 10 is described as being configured to form the left light distribution low beam distribution pattern PL1, but the right light distribution low beam distribution pattern is formed. Even in the case of the above configuration, the same effect as the above embodiment can be obtained by reversing the shape of the reflecting surface 16a of the reflector 16 left and right.

  Next, a modification of the above embodiment will be described.

  First, a first modification of the above embodiment will be described.

  6 and 7 are views similar to FIGS. 1 and 3, showing a vehicular lamp 110 according to this modification. FIG. 8 is a view similar to FIG. 5 for explaining the operation of this modification.

  As shown in these drawings, the basic configuration of this modification is the same as that of the above embodiment, but the configurations of the light emitting element 114 and the reflector 116 are different from those of the above embodiment.

  Also in this modified example, horizontal and oblique as an aggregate of projection images I1, I2, I3, and I4 of the light emitting surface 114a formed by the light from the light emitting element 114 reflected by the reflector 116 and transmitted through the projection lens 12 The low-beam light distribution pattern PL2 having the cut-off lines CL1 and CL2 is formed, but the formation positions of the projection images I1, I2, I3, and I4 are different from those in the above embodiment.

  That is, the light emitting element 114 of the present modification has the same configuration as the light emitting element 14 of the above embodiment, but is arranged in a state where the light emitting surface 114a extends in the vehicle width direction in plan view. ing. That is, the light emitting element 114 is obtained by rotating the light emitting element 14 of the above embodiment by 90 ° around a vertical line passing through the light emission center of the light emitting surface 14a.

  In addition, the reflector 116 of the present modification is also a reflection in which the reflection surface 116a is formed with an ellipsoid having the light emission center of the light emission surface 114a of the light emitting element 114 as the first focal point as a reference surface, as in the reflector 16 of the above embodiment. It has a surface shape.

  Specifically, the elliptical surface serving as the reference surface has an elliptical cross-sectional shape including the optical axis Ax as in the case of the above embodiment, and its eccentricity gradually increases from the vertical cross section toward the horizontal cross section. The rear focal point F of the projection lens 12 is the second focal point in the vertical cross section.

  However, in the reflector 116 of this modification, the formation positions of the first reflection region Z1 for forming the horizontal cutoff line CL1 and the second reflection region Z2 for forming the oblique cutoff line CL2 on the reflection surface 116a are as described above. It is different from the case of form.

  As shown in FIG. 8A, the low beam light distribution pattern PL2 is formed as a combined light distribution pattern of the first to third light distribution patterns P1 to P3 and the other fourth light distribution pattern P4. .

  On the other hand, as shown in FIG. 8B, the reflection surface 116a of the reflector 116 is configured by first to fourth reflection regions Z1 to Z4.

  The first light distribution pattern P1 is formed as an aggregate of projection images I1 of the light emitting surface 114a formed by the reflected light from the first reflection region Z1, and the second light distribution pattern P2 is formed in the second reflection region Z2. The third light distribution pattern P3 is formed as an aggregate of the projection image I2 of the light emitting surface 114a formed by the reflected light from the third reflection region Z3. The fourth light distribution pattern P4 is formed as an aggregate, and is formed as an aggregate of the projection images I4 of the light emitting surface 114a formed by the reflected light from the fourth reflection region Z4.

  The first reflection region Z1 is located above the light emitting surface 114a. Specifically, the first reflection region Z1 is set as a region extending in a band shape from the lower end edge of the reflector 16 to the front end edge of the reflector 16 with a constant left and right width around the optical axis Ax when viewed from the front of the lamp.

  The projected image I1 of the light emitting surface 114a formed by the reflected light from the first reflecting region Z1 has a rectangular outer shape in which the light emitting surface 114a of the light emitting element 114 extends in the vehicle width direction. It has a laterally long rectangular outer shape that is elongated in the horizontal direction.

  Therefore, by setting the reflection surface shape of the first reflection region Z1 so that the upper edge of the projection image I1 formed by the reflected light from each position of the first reflection region Z1 is aligned in the same horizontal direction, the projection image A first light distribution pattern P1 whose upper end edge extends in the horizontal direction is formed as an aggregate of I1, and a horizontal cutoff line CL1 is formed by the upper end edge.

  At that time, the projected image I1 formed by the reflected light from each position of the first reflective region Z1 is larger in size by the reflected light from the region near the upper end edge (that is, the region closer to the front end edge of the reflector 16). However, the reflection deflection angle in the left-right direction increases in the region near the upper edge of the first reflection region Z1 so that the projection image I1 having a small size is formed at a position away from the VV line. The surface shape is set as follows.

  The second reflection region Z2 is located in the vicinity of the side of the first reflection region Z1. Specifically, the second reflection region Z2 is set as a substantially rectangular region adjacent to the upper left side of the first reflection region Z1 when the lamp is viewed from the front.

  The projected image I2 of the light emitting surface 114a formed by the reflected light from the second reflecting region Z2 has a rectangular outer shape in which the light emitting surface 114a of the light emitting element 114 extends in the vehicle width direction. It has a rectangular outer shape extending in the direction.

  Therefore, by setting the reflecting surface shape of the second reflecting region Z2 so that the upper edge of the projected image I2 formed by the reflected light from each position of the second reflecting region Z2 is aligned in the same inclination line direction, the projection is performed. A second light distribution pattern P2 whose upper end edge extends in an oblique direction is formed as an aggregate of the images I2, and an oblique cut-off line CL2 is formed by the upper end edge.

  At that time, the projection image I2 constituting the second reflection region Z2 is essentially horizontal (ie, when the reflection surface 116a remains the reference surface), and is slightly horizontal on the left side of the optical axis Ax. Although it is formed at a position below the cut-off line CL1, it is formed in a state of protruding upward from the horizontal cut-off line CL1 by appropriately deforming the surface shape of the second reflection region Z2. ing. Since the surface shape of the second reflection region Z2 is greatly deformed from the reference surface as described above, the second reflection region Z2 is located at the boundary line between the second reflection region Z2 and the first and fourth reflection regions Z1 and Z4. A step will be formed.

  The third reflection region Z3 is set as a reflection region that is symmetrical to the second reflection region Z2 with respect to the optical axis Ax.

  The projection image I3 of the light emitting surface 114a formed by the reflected light from the third reflection region Z3 has a rectangular outer shape extending obliquely in the opposite direction to the projection image I2.

  At this time, the projection image I3 constituting the third reflection region Z3 is originally formed at a position slightly below the optical axis Ax and below the horizontal cutoff line CL1. 2 Since the projected image I2 constituting the reflection area Z2 is displaced upward from the original position in order to form the oblique cutoff line CL2, it is displaced slightly to the left to ensure the brightness of the original position. Thus, it is formed in a region straddling the VV line from side to side.

  The projection image I4 of the light emitting surface 114a formed by the reflected light from the fourth reflective region Z4 (that is, the reflective region other than the first to third reflective regions Z1 to Z3 in the reflective surface 116a) is the first to first aggregates. A fourth light distribution pattern P4 extending in the left-right direction is formed so as to fill the peripheral area of the third light distribution patterns P1 to P3.

  By adopting the configuration of this modification, the following operational effects can be obtained.

  That is, since the vehicular lamp 110 according to this modification is also configured to cause the reflected light from the reflector 116 to enter the projection lens 112 as it is, the luminous flux utilization rate can be maximized. At that time, since the light emitting element 114 as the light source has a clear outline of the light emitting surface 114a, the horizontal and oblique cut-off lines CL1 and CL2 are aligned by aligning the positions of the upper edges of the projected images I1 and I2, respectively. Can be formed clearly. Therefore, the low beam light distribution pattern PL2 having the horizontal and oblique cutoff lines CL1 and CL2 can be formed as a bright light distribution pattern without using a shade or a mirror member.

  At this time, in this modification, the light emitting surface 114a of the light emitting element 114 has a rectangular outer shape extending in the left-right direction, and the reflector 116 has the first reflection region Z1 positioned above the light emitting surface 114a. In addition, since the second reflection region Z2 is located in the vicinity of the side of the first reflection region Z1, the following operational effects can be obtained.

  In other words, when the light emitting surface 114a has a rectangular outer shape extending in the left-right direction, the projection of the light emitting surface 114a formed by the reflected light from the first reflection region Z1 located above the light emitting surface 114a. Since the images I1, I2, I3, and I4 have a horizontally-long rectangular outer shape, it is possible to easily align the positions of the upper end edges on the same horizontal line. Further, the projected images I1, I2, I3, and I4 of the light emitting surface 114a formed by the reflected light from the second reflecting region Z2 located in the vicinity of the side of the first reflecting region Z1 are rectangular outer shapes extending in the oblique direction. Therefore, it is possible to easily align the position of the upper edge in the same inclined line direction. Therefore, the horizontal and oblique cut-off lines CL1 and CL2 can be formed relatively clearly by the reflected light from the first and second reflection regions Z2.

  In the first modified example, the vehicular lamp 110 is described as being configured to form the left light distribution low beam distribution pattern PL2, but the right light distribution low beam distribution pattern is formed. Even in such a configuration, the same effect as the first modification can be obtained by reversing the shape of the reflecting surface 116a of the reflector 116 left and right.

  Next, a second modification of the above embodiment will be described.

  FIG. 9 is a view similar to FIG. 1 showing a vehicular lamp 210 according to this modification.

  As shown in the figure, the basic configuration of this modification is the same as that of the above embodiment, but in the case of the above embodiment in that a second light emitting element 214 and a second reflector 216 are additionally arranged. Accordingly, the configuration of the base member 220 is partially different from that of the above embodiment.

  The second light emitting element 214 is supported by the base member 220 below the light emitting element 14 with its light emitting surface 214a facing downward.

  The second light emitting element 214 has the same configuration as that of the light emitting element 14, but the light emitting surface 214a is elongated in the vehicle width direction when viewed from the bottom, at a position slightly deviated from directly below the light emitting element 14. It is arranged in an extended state.

  The 2nd reflector 216 is arrange | positioned so that the 2nd light emitting element 214 may be covered from the downward side, and is supported by the base member 220 in the upper end edge.

  The reflecting surface 216a of the second reflector 216 has a reflecting surface shape formed with an ellipsoid having a light emission center of the light emitting surface 214a of the second light emitting element 214 as a first focal point as a reference surface.

  Specifically, the elliptical surface serving as the reference surface has an elliptical cross-sectional shape including a straight line connecting the light emission center of the light emitting surface 214a and the rear focal point F of the projection lens 12, and its eccentricity is a vertical cross section. Is set so as to gradually increase from the horizontal cross section toward the horizontal cross section, and the rear focal point F of the projection lens 12 is the second focal point in the vertical cross section.

  The second reflector 216 reflects the additional light distribution pattern for high beam as an aggregate of projection images of the light emitting surface 214a formed by the light from the second light emitting element 214 reflected by the reflecting surface 216a and transmitted through the projection lens 12. It is configured to form.

  FIG. 10 is a perspective view of the high beam light distribution pattern PH formed on the virtual vertical screen by the front irradiation light from the vehicular lamp 210.

  This high beam light distribution pattern PH is a combined light distribution of the low beam light distribution pattern PL1 formed by lighting the light emitting element 14 and the high beam additional light distribution pattern PH0 formed by additional lighting of the second light emitting element 214. It is formed as a pattern.

  The high beam additional light distribution pattern PH0 is a light distribution formed as an aggregate of projection images of the light emitting surface 214a formed by the light from the second light emitting element 214 that has been reflected by the second reflector 216 and transmitted through the projection lens 12. It is a pattern.

  The high beam additional light distribution pattern PH0 is formed as a horizontally long light distribution pattern extending in the left-right direction around the VV line so as to straddle the horizontal and oblique cut-off lines CL1, CL2 in the vertical direction. The zone HZH is formed so as to partially overlap the hot zone HZL of the low beam light distribution pattern PL1 with HV at the center.

  By adopting the configuration of this modification, the following operational effects can be obtained.

  That is, by additionally lighting the second light emitting element 214 with respect to the light emitting element 14, the high beam light distribution pattern PH is formed as a combined light distribution pattern of the low beam light distribution pattern PL1 and the high beam additional light distribution pattern PH0. be able to.

  In addition, it is not necessary to use a movable shade or the like and control the driving of the second light emitting element 214 without using a movable shade or the like as in the prior art. Switching can be performed.

  At this time, in the vehicular lamp 210 according to this modification, the second light emitting element 214 is disposed below the light emitting element 14 with its light emitting surface 214a facing downward, so that the second reflector 216 is used as the reflector. 16, the vehicle lamp 210 can be configured in a compact manner.

  Instead of the configuration in which the second light emitting element 214 and the second reflector 216 are disposed below the light emitting element 14 and the reflector 16 as in the second modification, the second light emitting element 214 and the second reflector 216 emit light. It is also possible to adopt a configuration or the like arranged on the side of the element 14 and the reflector 16.

  In addition, the numerical value shown as a specification in the said embodiment and its modification is only an example, and of course, you may set these to a different value suitably.

  The invention of the present application is not limited to the configuration described in the above-described embodiment and its modifications, and a configuration with various other changes can be adopted.

10, 110, 210 Vehicle lamp 12 Projection lens 14, 114 Light emitting element 14a, 114a, 214a Light emitting surface 16, 116 Reflector 16a, 116a, 216a Reflecting surface 18 Lens holder 20, 220 Base member 214 Second light emitting element 216 Second Reflector Ax Optical axis CL1 Horizontal cut-off line CL2 Oblique cut-off line E Elbow point F Rear focus HZH, HZL Hot zone I1, I2, I3, I4 Projection image PH High beam light distribution pattern PH0 High beam additional light distribution pattern PL1, PL2 Low beam Light distribution pattern P1 first light distribution pattern P2 second light distribution pattern P3 third light distribution pattern P4 fourth light distribution pattern Z1 first reflection region Z2 second reflection region Z3 third reflection region Z4 fourth reflection region

Claims (5)

In a vehicular lamp comprising a projection lens, a light emitting element disposed behind the projection lens, and a reflector that reflects light from the light emitting element toward the projection lens,
The light emitting element is arranged with the light emitting surface of the light emitting element facing upward,
The reflector has a light distribution pattern for low beam having horizontal and oblique cut-off lines as an aggregate of projection images of the light emitting surface formed by light from the light emitting element reflected by the reflector and transmitted through the projection lens. Configured to form,
The reflector includes a first reflective region for forming the horizontal cutoff line, and a second reflective region for forming the oblique cutoff line,
The first reflective region has a reflective surface shape formed so that the position of the upper edge of the projected image of the light emitting surface is aligned on the same horizontal line,
The second reflection region has a reflection surface shape formed so as to align the position of the upper edge of the projection image of the light emitting surface in the same inclined line direction extending in a direction inclined with respect to the horizontal line. A vehicular lamp characterized by the above. The light emitting surface has a rectangular outer shape extending in the longitudinal direction,
The first reflective region is located near the lower edge of the reflector,
The vehicular lamp according to claim 1, wherein the second reflection area is disposed in the vicinity of the upper side of the first reflection area. The light emitting surface has a rectangular outer shape extending in the left-right direction,
The first reflective region is located above the light emitting surface;
The vehicular lamp according to claim 1, wherein the second reflection area is located in the vicinity of a side of the first reflection area. A second light emitting element and a second reflector that reflects light from the second light emitting element toward the projection lens;
The second reflector is a set of projection images of a light emitting surface of the second light emitting element formed by light from the second light emitting element reflected by the second reflector and transmitted through the projection lens. 4. The vehicular lamp according to claim 1, wherein the vehicular lamp is configured to form a high beam additional light distribution pattern straddling an oblique cut-off line in a vertical direction. 5.   5. The vehicular lamp according to claim 4, wherein the second light emitting element is disposed below the light emitting element with a light emitting surface of the second light emitting element facing downward.

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