JP2010218964A - Vehicular lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional vehicular lighting fixture emits distribution-uncontrollable light or produces irregular light distribution. <P>SOLUTION: Three lamp units 2, 3, 4 include light sources 5, 6, 7, reflectors 8, 9, 10 for reflecting lights L1, L2, L3 from the light sources 5, 6, 7, and lenses 11, 12, 13 for emitting the reflected lights L1, L2, L3 from the reflectors 8, 9, 10 to the outside in predetermined light distribution patterns in predetermined directions, respectively. The three lenses 11, 12, 13 of the three lamp units 2, 3, 4 are integrally constructed via joint parts, and the joint parts are provided with light distribution control-cum-diffusion parts 27, 28, 29. As a result, the light distribution control-cum-diffusion parts 27, 28, 29 actualize the emission of distribution-controlled light while avoiding irregular light distribution. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular lamp composed of a plurality of lamp units.

  This type of vehicular lamp is conventionally known (for example, Patent Document 1). Hereinafter, this conventional vehicle lamp will be described. A conventional vehicular lamp includes a single cylindrical lens, a plurality of light emitting elements arranged behind the rear focal line of one cylindrical lens, and light from the plurality of light emitting elements in front. And a plurality of reflectors to be reflected. A conventional vehicular lamp includes a plurality of lamp units each including a cylindrical lens, a light emitting element, and a reflector, and the cylindrical lenses of the plurality of lamp units are integrated into one. It is configured. In a conventional vehicular lamp, when a plurality of light emitting elements emit light, light from the plurality of light emitting elements is reflected forward by a plurality of reflectors, and the reflected light passes through one cylindrical lens and is transmitted to the plurality of light emitting elements. The predetermined light distribution pattern is irradiated to the outside, and a plurality of predetermined light distribution patterns are superimposed to illuminate the road surface and the like.

  However, since the conventional vehicular lamp described above is configured such that the cylindrical lenses of a plurality of lamp units are simply integrated into one, a plurality of lamp units of a single cylindrical lens are formed. The part corresponding to the boundary is merely a coupling part that couples the lens of one lamp unit and the lens of another lamp unit, and does not have a function of controlling light distribution or diffusing light. For this reason, the above-mentioned conventional vehicle lamp cannot control the light distribution emitted from the connecting portion of the single cylindrical lens having an integral structure. Further, the conventional vehicular lamp has a light / dark difference (luminance difference, light intensity difference) between one light distribution pattern formed by one lamp unit and another light distribution pattern formed by another lamp unit. There is a problem that the difference in brightness (illuminance difference) or the contrast between the outer light distribution pattern and the portion where no light is present (difference in light intensity, difference in illuminance) is large and uneven light distribution occurs.

JP 2005-294176 A

  Problems to be solved by the present invention include problems such as irradiation of light that is not subjected to light distribution control and uneven light distribution in a conventional vehicular lamp.

  In the present invention (the invention according to claim 1), the plurality of lamp units includes a light source, a reflector for reflecting light from the light source, and reflected light from the reflector in a predetermined direction with a predetermined light distribution pattern. A plurality of lamp units, and a plurality of lenses of a plurality of lamp units are integrally formed through a coupling portion, and a light distribution control and light diffusion is performed in the coupling portion that integrally couples the lens and the lens. A portion is provided.

  Further, in the present invention (the invention according to claim 2), a plurality of lamp units are arranged from the outer side to the inner side in the width direction of the vehicle, and the lamp unit on the outer side in the width direction of the vehicle is a concentrating type light distribution. The lamp unit on the inner side in the width direction of the vehicle irradiates a diffusion type light distribution pattern containing the light distribution type light distribution pattern, and the optical axis of the lamp unit on the inner side in the width direction of the vehicle is It faces the outside in the width direction.

  Furthermore, this invention (the invention according to claim 3) is characterized in that a plurality of reflectors of a plurality of lamp units form an integral structure.

  The vehicular lamp of the present invention (the invention according to claim 1) is irradiated as an auxiliary diffused light distribution pattern in which diffused light is light-distributed and controlled from the light distribution control and light diffusion unit of the coupling portion between the lenses. To this end, the vehicular lamp according to the present invention (the invention according to claim 1) performs light distribution control using the diffused light emitted from the light diffusion control / light diffusion unit of the coupling portion between the lenses as an auxiliary diffusion light distribution pattern. Can do. The vehicle lamp of the present invention (the invention according to claim 1) is a boundary between one light distribution pattern formed by one lamp unit and another light distribution pattern formed by another lamp unit. Alternatively, the auxiliary diffusion light distribution pattern can be applied to the boundary between the outer light distribution pattern and the portion without light. As a result, the vehicular lamp according to the present invention (the invention according to claim 1) is provided with one light distribution pattern formed by one lamp unit and another lamp unit formed by another lamp light distribution pattern. To reduce the difference in brightness (luminosity difference, illuminance difference) at the boundary between the light distribution pattern or the difference in brightness (luminosity difference, illuminance difference) at the boundary between the outer light distribution pattern and the part without light Therefore, unevenness in light distribution can be eliminated, and the light distribution pattern can be controlled with high accuracy, thereby improving visibility and contributing to traffic safety.

  Moreover, in the vehicular lamp of the present invention (the invention according to claim 1), since the plurality of lenses of the plurality of lamp units are integrally formed through the coupling portion, the following effects can be achieved. it can. That is, it is possible to reduce the relative position shift of the plurality of light distribution patterns irradiated from the plurality of lamp units, and to improve the overlapping accuracy of the plurality of light distribution patterns. In addition, the number of parts to be assembled and the number of assembly processes can be reduced compared to a vehicular lamp that incorporates a plurality of independent lenses for each of a plurality of lamp units, and the manufacturing cost is reduced accordingly. In addition, the weight can be reduced. Furthermore, compared to a vehicular lamp in which a plurality of independent lenses are assembled for each of the plurality of lamp units, the space required for the parts to which the lenses are assembled can be reduced. When laying out, a required space can be reduced and downsizing can be achieved.

  In the vehicular lamp of the present invention (the invention according to claim 2), the lamp unit on the outer side in the width direction of the vehicle irradiates the light collection pattern of the condensing type, and the lamp unit on the inner side in the width direction of the vehicle collects. A diffusion-type light distribution pattern containing a light-type light distribution pattern, which irradiates a diffusion-type light distribution pattern that is greatly diffused outside in the width direction of the vehicle. As a result, the vehicular lamp according to the present invention (the invention according to claim 2) can widely illuminate the outside in the width direction of the vehicle. For example, visibility of a road shoulder and the like is improved, contributing to traffic safety. be able to.

  Furthermore, in the vehicular lamp according to the present invention (the invention according to claim 3), the plurality of reflectors of the plurality of lamp units form an integral structure, and therefore, a plurality of light distribution patterns irradiated from the plurality of lamp units. Can be reduced, and the overlapping accuracy of a plurality of light distribution patterns can be improved. That is, the light distribution pattern can be accurately controlled, and the visibility can be improved correspondingly, thereby contributing to traffic safety.

It is a perspective view which shows the Example of the vehicle lamp concerning this invention. Similarly, it is a top view which shows a vehicle lamp. Similarly, it is a front view showing a vehicular lamp. Similarly, it is the IV-IV sectional view taken on the line in FIG. Similarly, it is the VV sectional view taken on the line in FIG. Similarly, it is the VI-VI sectional view taken on the line in FIG. Similarly, it is the VII-VII sectional view taken on the line in FIG. Similarly, it is explanatory drawing which shows schematically the light distribution pattern irradiated to a screen from the vehicle lamp with which the right side of the vehicle was equipped. Similarly, it is explanatory drawing which shows schematically the light distribution pattern irradiated to a screen from the vehicle lamp with which the left side of the vehicle was equipped. Similarly, the light distribution pattern irradiated on the screen from the vehicle lamp mounted on the right side of the vehicle and the light distribution pattern irradiated on the screen from the vehicle lamp mounted on the left side of the vehicle are combined and simulated. It is explanatory drawing shown in.

  Embodiments of a vehicular lamp according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In the drawings, the symbol “F” indicates the front side of the vehicle (the forward direction side of the vehicle). The symbol “B” indicates the rear side of the vehicle. The symbol “U” indicates the upward direction when the front side is viewed from the driver side. Reference sign “D” indicates a lower side when the front side is viewed from the driver side. The symbol “L” indicates the left side when the front side is viewed from the driver side. The symbol “R” indicates the right side when the front side is viewed from the driver side. The front, rear, upper, lower, left, and right are the front, rear, upper, lower, left, and right when the vehicle lighting device according to the present invention is mounted on the vehicle. Further, the symbol “VU-VD” indicates vertical lines on the top and bottom of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen.

  Hereinafter, the configuration of the vehicular lamp in this embodiment will be described. In this example, for example, a headlamp of an automotive headlamp will be described. The vehicular lamp (headlamp) of this embodiment is mounted on the right side of the front portion of the vehicle. Note that the vehicular lamp mounted on the left side of the front portion of the vehicle has a configuration that is substantially opposite to that of the vehicular lamp of this embodiment, and thus description thereof is omitted. The vehicle lamp of this embodiment will be described as a left-handed vehicle lamp. The right-hand traffic vehicle lamp has a light distribution pattern substantially opposite to that of the vehicle lamp of this embodiment.

  In the figure, reference numeral 1 denotes a vehicular lamp in this embodiment. As shown in the figure, the vehicular lamp 1 includes three so-called projector-type lamp units 2, 3, and 4. The three lamp units 2, 3, and 4 are configured to receive light in a lamp chamber (not shown) defined by a lamp housing and a lamp lens (for example, a transparent outer lens) of an automotive headlamp (not shown). The optical axis can be adjusted via an axis adjustment mechanism (not shown). The three lamp units 2, 3, 4 are arranged in the width direction of the vehicle.

  The three lamp units 2, 3, and 4 include light sources 5, 6, and 7, reflectors 8, 9, and 10, lenses 11, 12, and 13, shades 14, 15, and 16, a heat sink member 17, Are provided.

  The first lamp unit 2 disposed on the rightmost side of the vehicle, that is, on the outermost side in the width direction of the vehicle, is a condensing type light distribution pattern SP (the distribution indicated by the solid line in the center in FIG. 8). The lamp unit irradiates a light pattern, and includes a light source 5, a reflector 8, a lens 11, a shade 14, and a heat sink member 17. The optical axis Z1-Z1 of the first lamp unit 2 is parallel (including substantially parallel) to the traveling axis (not shown) of the vehicle.

  The second lamp unit 3 arranged in the middle includes a first diffusion type light distribution pattern WP1 (the light distribution pattern shown in the middle solid line in FIG. 8) containing the light collection type light distribution pattern SP. ), And includes a light source 6, a reflector 9, a lens 12, a shade 15, and a heat sink member 17. The optical axis Z2-Z2 of the second lamp unit 3 is parallel (including substantially parallel) to the traveling axis of the vehicle and the optical axis Z1-Z1 of the first lamp unit 2.

  The third lamp unit 4 arranged on the leftmost side of the vehicle, that is, the innermost side in the width direction of the vehicle contains the light condensing type light distribution pattern SP and the first diffusion type light distribution pattern WP1. A lamp unit for irradiating a second diffusion type light distribution pattern WP2 (light distribution pattern shown by the solid line on the outside in FIG. 8), which includes a light source 7, a reflector 10, a lens 13, and a shade 16 And a heat sink member 17. The optical axis Z3-Z3 of the third lamp unit 4 faces the outside in the width direction of the vehicle, that is, the right side.

  As shown in FIG. 8, the condensing type light distribution pattern SP includes an upper horizontal cut-off line CL1, a lower horizontal cut-off line CL2 on the opposite lane side, an upper horizontal cut-off line CL1, and the lower horizontal line. An oblique cut-off line CL3 between the cut-off line CL2 and an elbow point E at the intersection of the lower horizontal cut-off line CL2 and the oblique cut-off line CL3 form a high luminous intensity zone.

  As shown in FIG. 8, the first diffusion type light distribution pattern WP1 includes a horizontal cutoff line CL4 positioned at the same level as or slightly below the lower horizontal cutoff line CL2 of the light collecting type light distribution pattern SP. Having a medium luminous intensity zone.

  As shown in FIG. 8, the second diffusion type light distribution pattern WP2 includes the lower horizontal cutoff line CL2 of the condensing type light distribution pattern SP and the horizontal cut of the first diffusion type light distribution pattern WP1. It has a horizontal cutoff line CL5 located at the same level as or slightly below the offline CL4, and forms a low luminous intensity zone. Since the optical axis Z3-Z3 of the third lamp unit 4 faces the outside in the width direction of the vehicle, that is, the right side, the second diffusion type light distribution pattern WP2 is the light collection type light distribution pattern. It is turned to the right with respect to the SP and the first diffusion type light distribution pattern WP1. That is, the right diffusion width of the second diffusion type light distribution pattern WP2 is wider than the left diffusion width.

  The three light sources 5, 6, and 7 are semiconductor light sources such as self-luminous semiconductor light sources (LEDs in this embodiment) such as LEDs and EL (organic EL). The three light sources 5, 6, and 7 are minute substrates provided on a thermally conductive insulating substrate (for example, ceramic) substrate 18, 19, 20 and one surface (upper surface) of the substrate 18, 19, 20. A light emitting body (not shown) of a rectangular (square shape) LED chip, and light transmitting members (lenses) 21, 22, and 23 having a substantially hemispherical shape (dome shape) covering the light emitting body. . The substrates 18, 19, and 20 of the three light sources 5, 6, and 7 are fixed to one surface (upper surface) of the heat sink member 17.

  The three reflectors 8, 9, and 10 form an integral structure. The three reflectors 8, 9, and 10 are made of, for example, a material having a high thermal conductivity such as a resin member or a metallic die-casting and a light-impermeable material. The three reflectors 8, 9, and 10 are fixed to the shades 14, 15, and 16 that are also integrally structured. The three reflectors 8, 9, and 10 have a hollow shape in which front and lower portions are opened, and rear and upper portions and left and right side portions are closed. Convergent reflecting surfaces 24, 25, and 26 are provided on the concave inner surfaces of the substantially semi-dome-shaped blocking portions of the three reflectors 8, 9, and 10.

  The convergent reflective surfaces 24, 25, and 26 are reflective surfaces based on ellipses, for example, reflective surfaces such as spheroids and free-form surfaces (NURBS curved surfaces) based on ellipses (FIGS. 4, 5, and 6). The vertical cross section is an elliptical surface, and the horizontal cross section of FIG. 7 is a parabolic surface or a reflecting surface forming a deformed parabolic surface. For this reason, the convergent reflection surfaces 24, 25, and 26 have a first focal point F11, F12, and F13 and a second focal point (focal lines on a horizontal section, that is, both ends as viewed from above (plane)). , 12, 13 and curved focal lines whose center is located on the light sources 5, 6, 7 side) F21, F22, F23, and the optical axes Z1-Z1, Z2-Z2, Z3-Z3 Have. The first focal points F11, F12, and F13 of the convergent reflection surfaces 24, 25, and 26 are located at or near the light emitters (light emitting portions) of the light sources 5, 6, and 7, respectively.

  The lens (projection lens, convex lens, condenser lens) 11 of the first lamp unit 2 is a convex lens of an aspheric lens. The exit surface of the lens 11 forms a convex aspherical surface having a large curvature (small curvature radius), while the incident surface of the lens 11 forms a convex aspherical surface having a small curvature (large curvature radius). By using such a lens 11, the focal length of the lens 11 is reduced, and accordingly, the size of the lens 11 of the vehicle lamp 1 in this embodiment in the direction of the optical axis Z1-Z1 becomes compact. . The entrance surface of the lens 11 may be a flat aspheric surface (plane).

  The lens 11 has a front focus (focus on the light sources 5, 6, 7 side) and a rear focus (external focus), and an optical axis Z1-Z1 that connects the front focus and the rear focus. . The optical axis Z1-Z1 of the convergent reflection surface 24 and the optical axis Z1-Z1 of the lens 11 substantially coincide as the lamp optical axis. The front focal point of the lens 11 is a lens focal point (a meridional image plane that is a focal plane on the object space side). The lens focal point of the lens 11 is located at or near the second focal point F21 of the convergent reflective surface 24. The lens 11 irradiates (projects) the condensing type light distribution pattern SP in front of the vehicle.

  The lens 12 of the second lamp unit 3 and the lens 13 of the third lamp unit 4 are cylindrical lenses having a cylindrical axis in the vehicle width direction (horizontal direction). The exit surfaces of the lenses 12 and 13 are convex aspherical surfaces having a large curvature (small curvature radius), while the entrance surfaces of the lenses 12 and 13 are convex aspherical surfaces having a small curvature (large curvature radius). Eggplant. By using such lenses 12 and 13, the focal length of the lenses 12 and 13 is reduced, and accordingly, in the direction of the optical axes Z2 to Z2 and Z3 to Z3 of the vehicle lamp 1 in this embodiment. The dimensions are compact. The entrance surfaces of the lenses 12 and 13 may be flat aspheric surfaces (planes).

  The lenses 12, 13 have a front focal line (focal line on the light sources 5, 6, 7 side) and a rear focal line (external focal line). The front focal points of the lenses 12 and 13 are located at or near the second focal points F22 and F23 of the convergent reflecting surfaces 25 and 26, respectively. The lenses 12 and 13 irradiate (project) the first diffusion type light distribution pattern WP1 and the second diffusion type light distribution pattern WP2 in front of the vehicle.

  Since the light emitted from the three light sources 5, 6, and 7 does not have high heat, resin lenses can be used as the three lenses 11, 12, and 13. The three lenses 11, 12, and 13 are made of resin lenses such as PC material, PMMA material, and PCO material. The three lenses 11, 12, and 13 are integrally formed through a coupling portion. The three lenses 11, 12, and 13 are fixed to the three shades 14, 15, and 16, which are also integrally formed.

  The coupling unit that integrally couples the lens 11 of the first lamp unit 2 and the lens 12 of the second lamp unit 3, and the lens 13 and the third lamp unit 4 of the second lamp unit 3. Light distribution control / light diffusing portions 27, 28, and 29 are provided at the coupling portion that integrally couples the lens 13 and the end portion of the lens 13 of the third lamp unit 4, respectively.

  The light distribution control / light diffusion portions 27, 28, and 29 are provided on the exit surface side of the lenses 11, 12, and 13. The light distribution control / light diffusing sections 27, 28, 29 are composed of four vertical prisms in this example, that is, as shown in FIG. 7, the horizontal section (transverse section) is almost semicircular. It consists of a prism.

  The light distribution control / light diffusing sections 27 and 28 on both sides of the lens 12 of the second lamp unit 3 perform first light distribution control of the reflected light from the convergent reflection surface 25 of the second lamp unit 3. The auxiliary diffusion light distribution pattern WP3 (light distribution pattern shown by the dotted line on the center side in FIG. 8) is applied to the left and right ends of the first diffusion type light distribution pattern WP1. Further, the light distribution control and light diffusion units 28 and 29 on both sides of the lens 13 of the third lamp unit 4 perform light distribution control of the reflected light from the convergent reflection surface 26 of the third lamp unit 4. The second auxiliary diffusion light distribution pattern WP4 (light distribution pattern shown by the outer dotted line in FIG. 8) is applied to the left and right ends of the second diffusion type light distribution pattern WP2.

  The three shades 14, 15, and 16 form an integral structure. The three shades 14, 15, 16 are made of a material having a high thermal conductivity such as a resin member or a metal die cast and a light-impermeable material, like the reflectors 8, 9, 10. The three shades 14, 15, 16 are composed of a vertical portion fixed to the heat sink member 17 and a horizontal portion integrally extending from the substantially center of the vertical portion to the front side. .

  The three light sources 5, 6, 7 and the three reflectors 8, 9, 10 are fixed to one surface (upper surface) of the horizontal portion of the three shades 14, 15, 16, respectively. . Edges 30, 31, and 32 are provided at the corners of the horizontal portions of the three shades 14, 15, and 16 (the angles formed by the upper surface and the front surface), respectively. The edges 30, 31, and 32 are located at or near the second focal points F21, F22, and F23 of the convergent reflecting surfaces 24, 25, and 26, or the focal points of the lenses 11, 12, and 13, respectively. .

  The horizontal portion and the edge 30 of the shade 14 of the first lamp unit 2 cut off a part of the reflected light radiated from the light source 5 and reflected by the convergent reflection surface 24, thereby remaining reflection. The condensing type light distribution pattern SP, the upper horizontal cutoff line CL1, the lower horizontal cutoff line CL2, the oblique cutoff line CL3, and the elbow point E are formed by light.

  The horizontal portion and the edge 31 of the shade 15 of the second lamp unit 3 cut off a part of the reflected light radiated from the light source 6 and reflected by the convergent reflective surface 25, and the remaining reflection. The light forms the first diffusion type light distribution pattern WP1 and the horizontal cut-off line CL4.

  The horizontal portion and the edge 32 of the shade 16 of the third lamp unit 4 cut off a part of the reflected light radiated from the light source 7 and reflected by the convergent reflective surface 26, and the remaining reflection. The light forms the second diffusion type light distribution pattern WP2 and the horizontal cut-off line CL5.

  The three lenses 11, 12, 13 are fixed via holders 33 on the left and right sides of the horizontal portion of the three shades 14, 15, 16. In the horizontal portions of the three shades 14, 15, 16, a part of the reflected light from the convergent reflection surfaces 24, 25, 26 cut off at the horizontal portion is transferred to the lenses 11, 12, 13. You may provide the additional reflective surface (not shown) which forms the auxiliary light distribution pattern, for example, the light distribution pattern for overhead signs (not shown), reflecting it in the side.

  The heat sink member 17 is made of a material having high thermal conductivity such as resin or metallic die casting. The heat sink member 17 has a vertical flat plate shape on the front side and a vertical fin shape from the middle to the rear side. A front portion of the heat sink member 17 is fixed to a vertical portion of the three shades 14, 15, and 16.

  The vehicular lamp 1 in this embodiment is configured as described above, and the operation thereof will be described below.

  First, the light emitters of the light sources 5, 6, and 7 of the vehicular lamp 1 are turned on. Then, lights L1, L2, and L3 are emitted from the light emitters of the light sources 5, 6, and 7. Lights L1, L2, and L3 emitted from the light emitters of the light sources 5, 6, and 7 are reflected by the convergent reflection surfaces 24, 25, and 26. The reflected lights L1, L2, and L3 converge (concentrate) on the second focal points F21, F22, and F23 of the convergent reflection surfaces 24, 25, and 26. Some of the reflected lights L1, L2, and L3 that converge (concentrate) on the second focal points F21, F22, and F23 are cut off by the shades 14, 15, and 16. On the other hand, the remaining reflected lights L1, L2, and L3 that have not been cut off by the shades 14, 15, and 16 are the condensing type light distribution pattern SP, the first diffusion type light distribution pattern WP1, and the second. A diffusion type light distribution pattern WP2, a first auxiliary diffusion light distribution pattern WP3, and a second auxiliary diffusion light distribution pattern WP4 are irradiated in front of the vehicle.

  That is, as shown in FIG. 8, the central portion of the screen is irradiated with a light-collecting type light distribution pattern SP having a high luminous intensity from the lens 11 of the first lamp unit 2. Further, the lens 12 of the second lamp unit 3 is irradiated with the first diffusion type light distribution pattern WP1 having a medium luminous intensity containing the condensing type light distribution pattern SP. Further, the lens 13 of the third lamp unit 4 contains the light condensing type light distribution pattern SP and the first diffusion type light distribution pattern WP1, and the right side diffusion width is compared with the left side diffusion width. The light distribution pattern WP2 of the second diffusion type having a low luminous intensity that is wide is irradiated. Furthermore, from the light distribution control and light diffusion sections 27 and 28 on both sides of the lens 12 of the second lamp unit 3, the first auxiliary diffusion light distribution pattern WP3 subjected to light distribution control is the first diffusion type light distribution pattern WP1. Irradiates both left and right ends. Furthermore, from the light distribution control and light diffusion sections 28 and 29 on both sides of the lens 13 of the third lamp unit 4, the second auxiliary diffusion light distribution pattern WP4 subjected to light distribution control is the second diffusion type light distribution pattern WP2. Irradiates both left and right ends. In this way, the road surface in front of the vehicle (roadway, sidewalk, other vehicles, pedestrians, traffic signs, buildings, etc.) can be illuminated.

  The condensing type light distribution pattern SP, the first diffusion type light distribution pattern WP1, the second diffusion type light distribution pattern WP2, and the first auxiliary diffusion light distribution pattern WP3 shown in FIG. The second auxiliary diffusion light distribution pattern WP4 is a light distribution pattern emitted from the vehicle lamp 1 in this embodiment, which is provided on the right side of the front portion of the vehicle. As shown in FIG. 9, the light distribution pattern irradiated from the vehicular lamp mounted on the left side of the front portion of the vehicle is a light distribution pattern obtained by reversing the light distribution pattern shown in FIG. And the light distribution pattern irradiated from the vehicle lamp 1 in this embodiment equipped on the right side of the front portion of the vehicle, and the light distribution pattern irradiated from the vehicle lamp mounted on the left side of the front portion of the vehicle, , The light distribution pattern shown in FIG. 10, that is, the light distribution pattern for passing is obtained.

  The vehicular lamp 1 in this embodiment is configured and operated as described above, and the effects thereof will be described below.

  In this embodiment, the vehicular lamp 1 includes a first auxiliary diffusion light distribution pattern WP3 in which diffused light is distributed from the light distribution control and light diffusion units 27, 28, and 29 of the coupling portions of the lenses 11, 12, and 13; Irradiated as the second auxiliary diffusion light distribution pattern WP4. For this reason, the vehicular lamp 1 in this embodiment uses the first auxiliary diffused light distribution pattern to diffuse light emitted from the light distribution control / light diffusion units 27, 28, 29 of the coupling portions of the lenses 11, 12, 13 to each other. Light distribution can be controlled as WP3 and second auxiliary diffusion light distribution pattern WP4. In addition, the vehicular lamp 1 in this embodiment has a boundary between the first diffused light distribution pattern WP1 formed by the second lamp unit 3 and the second diffused light distribution pattern WP2 formed by the third lamp unit 4. And the first auxiliary diffusion light distribution pattern WP3 and the second auxiliary diffusion light distribution pattern at the boundary between the outer second diffusion light distribution pattern WP2 formed by the third lamp unit 4 and the light-free portion. WP4 can be irradiated. As a result, the vehicular lamp 1 in this embodiment has the first diffusion light distribution pattern WP1 formed by the second lamp unit 3 and the first auxiliary light distribution pattern WP4 and the second auxiliary light distribution pattern WP4. Brightness / darkness difference (luminance difference, illuminance difference) at the boundary with the second diffused light distribution pattern WP2 formed by the three lamp units 4, and an outer second diffused light distribution pattern formed by the third lamp unit 4. Since the light / dark difference (luminosity difference, illuminance difference) at the boundary between WP2 and the portion without light can be reduced, uneven light distribution can be eliminated, and the light distribution pattern can be accurately controlled. This can improve visibility and contribute to traffic safety.

  Moreover, in the vehicle lamp 1 in this embodiment, the three lenses 11, 12, and 13 of the three lamp units 2, 3, and 4 are integrated via a coupling portion (light distribution control and light diffusion portions 27 and 28). Therefore, the following effects can be achieved. That is, three light distribution patterns (light collection type light distribution pattern SP, first diffusion type light distribution pattern WP1, second diffusion type light distribution pattern) irradiated from three lamp units 2, 3, 4 The displacement of the relative position of WP2) can be reduced, and the overlapping accuracy of the three light distribution patterns can be improved. In addition, the number of parts to be assembled and the number of assembly processes can be reduced compared to a vehicular lamp that incorporates a plurality of independent lenses for each of a plurality of lamp units, and the manufacturing cost is reduced accordingly. In addition, the weight can be reduced. Furthermore, compared with a vehicular lamp in which a plurality of independent lenses are assembled for each of the plurality of lamp units, the space required for the parts to which the lenses are assembled can be reduced. When laying out three, four, the necessary space can be reduced and the size can be reduced.

  Further, in the vehicle lamp 1 in this embodiment, the first lamp unit 2 on the outer side in the width direction of the vehicle irradiates the condensing type light distribution pattern SP, and the third lamp unit 4 on the inner side in the width direction of the vehicle A second diffusion type light distribution pattern WP2 containing a condensing type light distribution pattern SP, which irradiates the second diffusion type light distribution pattern WP2 that is greatly diffused outside in the width direction of the vehicle. . As a result, the vehicular lamp 1 in this embodiment can widely illuminate the outside in the width direction of the vehicle, and the visibility of, for example, the road shoulder is improved, which can contribute to traffic safety.

  Further, in the vehicle lamp 1 in this embodiment, since the three reflectors 8, 9, and 10 of the three lamp units 2, 3, and 4 form an integral structure, the three lamp units 2, 3, and 4 The displacement of the relative positions of the three light distribution patterns to be irradiated (the condensing type light distribution pattern SP, the first diffusion type light distribution pattern WP1, and the second diffusion type light distribution pattern WP2) can be reduced. The overlapping accuracy of the three light distribution patterns can be improved. That is, the light distribution pattern can be accurately controlled, and the visibility can be improved correspondingly, thereby contributing to traffic safety.

  In addition, the said Example demonstrates the headlamp of the headlamp for motor vehicles. However, the present invention can also be applied to vehicle lamps other than the headlamps of automobile headlamps, such as fog lamps, curve lamps, bending lamps, and the like.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 1st lamp unit 3 2nd lamp unit 4 3rd lamp unit 5 Light source of 1st lamp unit 6 Light source of 2nd lamp unit 7 Light source of 3rd lamp unit 8 Reflector of 1st lamp unit 9 2nd Reflector of lamp unit 10 Reflector of third lamp unit 11 Lens of first lamp unit 12 Lens of second lamp unit 13 Lens of third lamp unit 14 Shade of first lamp unit 15 Shade of second lamp unit 16 Third lamp Unit shade 17 Heat sink member 18, 19, 20 Substrate 21, 22, 23 Light transmitting member 24 Convergent reflective surface of first lamp unit 25 Convergent reflective surface of second lamp unit 26 Convergent reflective surface of third lamp unit 27, 28, 29 Light distribution control and light Scatter part F Before B After U Up D Down L Left R Right HL-HR Horizontal line on the screen VU-VD Vertical line on the screen Z1-Z1 Optical axis of the first lamp unit Z2-Z2 Light of the second lamp unit Axis Z3-Z3 Optical axis of third lamp unit F11 First focal point of converging reflective surface of first lamp unit F21 Second focal point of converging reflective surface of first lamp unit F12 Converging reflective surface of second lamp unit First focus F22 Second focus of the convergent reflecting surface of the second lamp unit F13 First focus of the convergent reflecting surface of the third lamp unit F23 Second focus of the convergent reflecting surface of the third lamp unit SP Condensing type Light distribution pattern WP1 First diffusion type light distribution pattern WP2 Second diffusion type light distribution pattern WP3 First auxiliary diffusion light distribution pattern WP4 Second auxiliary diffusion light distribution pattern Turn E Elbow point CL1 Upper horizontal cut-off line CL2 Lower horizontal cut-off line CL3 Oblique cut-off line CL4 Horizontal cut-off line CL5 Horizontal cut-off line L1 Light from the first lamp unit L2 Light from the second lamp unit L3 Light from the third lamp unit

Claims (3)

In the vehicular lamp composed of a plurality of lamp units,
The plurality of lamp units each include a light source, a reflector that reflects light from the light source, and a lens that irradiates the reflected light from the reflector with a predetermined light distribution pattern in a predetermined direction.
The plurality of lenses of the plurality of lamp units are integrally configured via a coupling portion,
The coupling unit that couples the lens and the lens integrally is provided with a light distribution control and light diffusion unit.
A vehicular lamp characterized by the above. The plurality of lamp units are arranged from the outer side to the inner side in the width direction of the vehicle,
The lamp unit on the outer side in the width direction of the vehicle irradiates a condensing type light distribution pattern,
The lamp unit inside the width direction of the vehicle irradiates a diffusion type light distribution pattern containing the light collection type light distribution pattern,
The optical axis of the lamp unit on the inner side in the vehicle width direction faces the outer side in the vehicle width direction,
The vehicular lamp according to claim 1. The plurality of reflectors of the plurality of lamp units form an integral structure.
The vehicular lamp according to claim 1 or 2.

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