JP2021111446A - Vehicle lighting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture for a vehicle capable of clearly forming a distributed light region of each part of a traveling light distribution pattern. SOLUTION: A vehicle lighting tool 10 has a first light source 11 that emits light L1 that forms a light distribution pattern LP for passing each other, and light L2 that forms a light distribution pattern HP for traveling, which is composed of a plurality of divided light regions hp. The light L1 from the first light source 11 is projected onto the vehicle front to form the passing light distribution pattern LP, and the light L2 from the second light source 12 is projected onto the vehicle front. A plurality of projection lenses 17 that form a traveling light distribution pattern HP and a plurality of light L2 that are individually provided corresponding to each second light source 12 and that are emitted from the corresponding second light source 12 are guided to the projection lens 17. The lens light guide unit (41) is provided, the lens light guide unit has a light guide incident surface (44) facing the second light source 12, and the light guide incident surface is at least partially a second light source 12. It is a curved surface that is convex to the side. [Selection diagram] Fig. 2

Description

The present disclosure relates to vehicle lamps.

In vehicle lighting fixtures, light from the first light source is emitted from a projection lens to form a passing light distribution pattern, and light from a second light source is emitted from a projection lens to form a traveling light distribution pattern. be.

Such a vehicle lamp is configured by arranging a plurality of second light sources in the width direction, and each second light source individually arranges the partially distributed light regions in the width direction to form a traveling light distribution pattern. (See, for example, Patent Document 1 and the like). By individually turning on and off the distributed light regions of each part of the vehicle lighting equipment, it is possible to form a traveling light distribution pattern while allowing partial turning off to avoid oncoming vehicles and the like.

JP-A-2017-199660

Here, in the above-mentioned vehicle lighting equipment, since each part distribution light region is individually turned on and off, each part distribution light region is distributed to each part so as not to be greatly expanded to the adjacent part distribution light region and blurred. It is desirable to clearly form the optical region. For this reason, the vehicle lighting equipment described above is provided with a second light guide lens individually corresponding to each second light source, and a projection lens while condensing the light from each second light source with the corresponding second light source lens. By leading to, the light region distributed to each part is clarified. However, in the above-mentioned vehicle lighting equipment, since each second light source emits light from a light emitting surface having a predetermined area, it is difficult to properly collect the light with the second light guide lens, and each part distributed light region is covered. There is room for improvement in terms of clarification.

The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a vehicle lamp capable of clearly forming a light distribution region for each part of a light distribution pattern for traveling.

The vehicle lighting equipment of the present disclosure includes a first light source that emits light that forms a light distribution pattern for passing each other, and a plurality of second light sources that emit light that forms a light distribution pattern for traveling, which is composed of a plurality of partially distributed light regions. Then, the light from the first light source is projected to the front of the vehicle to form the passing light distribution pattern, and the light from the plurality of second light sources is projected to the front of the vehicle to form the traveling light distribution pattern. The projection lens to be formed and a plurality of lens light guide portions individually provided corresponding to the plurality of the second light sources and guiding the light emitted from the corresponding second light sources to the projection lens are provided. The lens light guide portion has a light guide incident surface facing the second light source, and the light guide incident surface is characterized in that at least a part thereof is a curved surface that is convex toward the second light source side.

According to the vehicle lighting equipment of the present disclosure, it is possible to clearly form each part distributed light region of the traveling light distribution pattern.

It is explanatory drawing which shows the structure of the vehicle lamp as an example which concerns on one Embodiment of the vehicle lamp which concerns on this disclosure. It is sectional drawing obtained along the line I-I of FIG. It is explanatory drawing which shows the structure of the 1st lens light guide part of a vehicle lamp. It is explanatory drawing which shows the structure of the 2nd lens light guide part of a vehicle lamp. It is explanatory drawing which shows the structure of the 2nd lens light guide part. It is explanatory drawing which shows the structure of the 2nd light guide entrance surface of the 2nd lens light guide part. It is explanatory drawing which shows the light distribution pattern for passing. It is explanatory drawing which shows the light distribution pattern for traveling. It is explanatory drawing which shows the state which overlapped with the light distribution pattern for running and the light distribution pattern for passing.

Hereinafter, a first embodiment of the vehicle lamp 10 as an embodiment of the vehicle lamp according to the present disclosure will be described with reference to FIGS. 1 to 9. In addition, in FIG. 2, FIG. 5, and FIG. 6, the hatch showing the cross section in the second lens light guide unit 41 and the projection lens 17 is omitted in order to avoid complication.

The vehicle lamp 10 is used as a lamp used in a vehicle such as an automobile, and is used, for example, in a head lamp, a fog lamp, or the like. The vehicle lighting fixture 10 has an optical axis adjustment mechanism for the vertical direction and an optical axis adjustment for the width direction in a lamp chamber formed by covering the open front end of the lamp housing with an outer lens on both the left and right sides of the front portion of the vehicle. It is provided via a mechanism. In the following description, in the vehicle lighting equipment 10, when the direction in which the lens axis La of the projection lens 17 which is the direction of irradiating light extends is the front-rear direction (Z in the drawing) and the front-rear direction is along the horizontal plane. The vertical direction is the vertical direction (Y in the drawing), and the direction orthogonal to the front-back direction and the vertical direction (horizontal direction) is the width direction (X in the drawing). The front side in the front-rear direction points to the front of the vehicle in the vehicle lamp 10.

As shown in FIGS. 1 and 2, the vehicle lamp 10 includes a plurality of first light sources 11, a plurality of second light sources 12, a heat sink member 13, a first light guide lens 14, a second light guide lens 15, and a shade 16. And a projection lens 17 are provided to form a headlight unit. In the vehicle lamp 10, the front-rear direction is defined by the lens axis La of the projection lens 17. The lens axis La is an axis that is the optical center of the projection lens 17.

The plurality of first light sources 11 are aligned in the width direction, and in the first embodiment, seven (see FIG. 3) are aligned. Each first light source 11 is composed of a light emitting element such as an LED (Light Emitting Diode), and each is mounted on a substrate 18. The substrate 18 has a flat plate shape and is fixed to the front surface 13a of the heat sink member 13. Each of the first light sources 11 is appropriately lit by being supplied with electric power from the lighting control circuit. The seven first light sources 11 are arranged in the width direction, with one in the middle provided on the lens axis La in a plane orthogonal to the vertical direction, and the distance is increased toward the outside in the width direction. (See Fig. 3). Note that this interval may be set as appropriate, and is not limited to the configuration of the first embodiment.

The plurality of second light sources 12 are aligned in the width direction, and in the first embodiment, 12 (see FIG. 4) are aligned. Each second light source 12 is composed of a light emitting element such as an LED, and is on the same substrate 18 as each first light source 11 on the lower side in the vertical direction and the rear side in the front-rear direction than each first light source 11. It is mounted on the same plane. Therefore, the substrate 18 and the front surface 13a have a normal direction as a dip angle with respect to the front-rear direction on a surface including the front-rear direction and the up-down direction. Each of the second light sources 12 is appropriately turned on all at once or individually by being supplied with electric power from the lighting control circuit. The number of the second light sources 12 may be appropriately set, and is not limited to the configuration of the first embodiment.

Each of the first light source 11 and each second light source 12 emits light from a plane light emitting unit, and the emission optical axis Li is set in a direction orthogonal to the mounted substrate 18. In the following, what is emitted by each of the first light sources 11 is referred to as light L1, and what is emitted by each of the second light sources 12 is referred to as light L2. The first light source 11 and the second light source 12 are mounted on the same substrate 18, so that their respective emission optical axes Li are parallel. Each emission optical axis Li has a dip angle in the range of 30 to 50 degrees with respect to the front-rear direction. In the first embodiment, each of the emitted optical axes Li is set by determining an angle with respect to the front-rear direction on the substrate 18.

The heat sink member 13 is a heat radiating member that releases heat generated by each of the first light sources 11 and each of the second light sources 12 to the outside, and is made of a metal material or a resin material having high thermal conductivity. In the heat sink member 13, a plurality of plate-shaped heat radiating fins 13b are provided in parallel on the side opposite to the front surface 13a (see FIG. 1). In the heat sink member 13, the substrate 18 is attached to the front surface 13a so that each emission optical axis Li has the above angle.

The first light guide lens 14 guides the light L1 emitted from each of the first light sources 11 mounted on the substrate 18 to the projection lens 17. The first light guide lens 14 is made of a transparent resin, and as shown in FIG. 3, seven first lens light guide portions arranged in the width direction individually corresponding to each first light source 11. Has 21. Each first lens light guide unit 21 has a first light guide incident surface 22 facing the corresponding first light source 11, and a first light guide exit surface 23 directed toward the projection lens 17. They are connected to each other by the connecting portion 24. Each first lens light guide unit 21 causes light L1 from each first light source 11 incident from the first light guide incident surface 22 and emitted from each first light guide emission surface 23 to be emitted from the tip edge 16a of the shade 16. It is optically designed to focus in the vicinity.

The second light guide lens 15 guides the light L2 emitted from the second light source 12 mounted on the substrate 18 to the projection lens 17. As shown in FIG. 4, the second light guide lens 15 has twelve second lens light guide units 41 individually corresponding to each second light source 12 and arranged in the width direction. The configuration of each of the second lens light guide portions 41 will be described later.

As shown in FIGS. 1 and 2, the shade 16 is provided on the second light guide lens 15 and has a plate shape extending in the width direction. Therefore, the shade 16 is provided between the optical path from each of the first light sources 11 to pass through the first light guide lens 14 and the optical path from each of the second light sources 12 to pass through the second light guide lens 15. The shade 16 has a shape in which the front end edge 16a in the front-rear direction is joined by two horizontal edges having different positions in the vertical direction at an inclined edge. The shade 16 is for passing by by blocking a part of the light L1 emitted from each of the first light sources 11 and guided by the first light guide lens 14 (each of the first lens light guide portions 21) by the tip edge 16a. A cut-off line CL (see FIG. 7) is formed by connecting two horizontal cut-off lines with an inclined cut-off line on the upper edge of the light distribution pattern LP. The size of the shade 16 may be appropriately set as long as it forms a cut-off line CL at the tip edge 16a, and is not limited to the configuration of the first embodiment.

The projection lens 17 is a convex lens, and in the first embodiment, the exit surface 17a is a convex surface and the incident surface 17b is a flat surface. As long as the projection lens 17 is a convex lens as a whole, the exit surface 17a may be a flat surface or a concave surface, and the incident surface 17b may be a convex surface or a concave surface, and is not limited to the configuration of the first embodiment. The projection lens 17 is supported by the lens holder. The lens holder is in a state where the projection lens 17 is positioned with respect to each of the first light source 11, each second light source 12, the first light guide lens 14, the second light guide lens 15, and the shade 16 mounted on the substrate 18. , Assembled to the heat sink member 13.

As shown in FIG. 2, the projection lens 17 has the rear focal point Fb set in the vicinity of the tip edge 16a of the shade 16. The projection lens 17 projects the light L1 emitted from the first light source 11 and guided by the first light guide lens 14 toward the front of the vehicle to obtain the passing light distribution pattern LP (at least a part) of FIG. Form. Further, the projection lens 17 forms the traveling light distribution pattern HP of FIG. 8 by projecting the light L2 emitted from each of the second light sources 12 and guided by the second light guide lens 15 toward the front of the vehicle. ..

Next, the configuration of the second light guide lens 15 will be described with reference to FIGS. 4 to 6. The second light guide lens 15 is made of a transparent resin, and as shown in FIG. 4, twelve second lens light guide portions arranged in the width direction individually corresponding to each second light source 12. Has 41. Each second lens light guide unit 41 has 12 long rod-shaped portions 42 whose second light source 12 side, that is, the substrate 18 side extends toward the projection lens 17 side, and each rod-shaped portion 42 is in the width direction. They are arranged in parallel at intervals. Further, each of the second lens light guide portions 41 has a plate shape in which each rod-shaped portion 42 is integrated with a plate-shaped portion 43 on the projection lens 17 side and expands in the width direction.

Each of the second lens light guide portions 41 has a portion of each rod-shaped portion 42 facing the second light source 12 as a second light guide incident surface 44, and a portion of the plate-shaped portion 43 facing the projection lens 17 side. 2 The light guide emitting surface 45 is used. Therefore, the second light guide incident surface 44 is formed into twelve surfaces individually facing the twelve second light sources 12, and the second light guide exit surface 45 is the twelve second lens light guide portions 41. Is a single surface connected in the width direction. The width direction of each rod-shaped portion 42 is widened from the second light guide incident surface 44 toward the second light guide exit surface 45. The proportion of each rod-shaped portion 42 that expands in the width direction increases as the provided position changes from the inside to the outside in the width direction. That is, in each rod-shaped portion 42, the two central portions in the width direction extend toward the projection lens 17 side with substantially the same dimensions as the second light guide incident surface 44, and the provided positions are toward the outside in the width direction. , The way of spreading with respect to the second light guide incident surface 44 becomes large. Each second lens light guide unit 41 has the same optical design as each other. Therefore, in the following, the optical design of the second lens light guide unit 41 will be described with reference to FIG. 5 showing a cross section similar to that of FIG. 2 and FIG. 6 which is a partially enlarged view thereof. FIG. 5 shows a cross section of the second lens light guide unit 41, which is the sixth from the right in FIG.

As shown in FIG. 5, the second lens light guide unit 41 has an incident side light guide reflecting surface 46 and an emitting side light guide reflecting surface in addition to the second light guide incident surface 44 and the second light guide emitting surface 45. 47 is provided. Here, the second lens light guide unit 41 directs the light L2 from the second light source 12, whose emission optical axis Li is inclined toward the front side in the front-rear direction and downward in the vertical direction, to the rear side of the projection lens 17. Direct to the vicinity of the focal point Fb. Therefore, the second light guide incident surface 44 faces the second light source 12 and is orthogonal to the emission light axis Li of the second light source 12 as a whole, and is in the vertical direction toward the rear side in the front-rear direction. It is tilted downward, that is, parallel to the substrate 18. Further, since the upper end 45a of the second light guide emission surface 45 is located near the second focal point F2 of the incident side light guide reflection surface 46 described later, the second light guide emission surface 45 is in the vertical direction toward the front side in the front-rear direction. It is said to be inclined downward (see Fig. 2). As a result, the second lens light guide unit 41 intersects the direction in which the light L2 from the second light source 12 is incident from the second light guide incident surface 44 and the direction in which the light L2 is emitted from the second light guide exit surface 45. Has been done.

Therefore, the incident side light guide reflecting surface 46 is provided on the lower surface (lower surface) in the vertical direction in the vicinity of the second light guide incident surface 44 (mainly the rod-shaped portion 42) in the second lens light guide unit 41. The light L2 incident from the second light guide incident surface 44 is reflected on the second light guide exit surface 45 side, that is, on the front side in the front-rear direction and on the upper side. Further, the emission side light guide reflection surface 47 is provided on the upper side in the vertical direction in the vicinity of the second light guide emission surface 45 (mainly the plate-shaped portion 43) in the second lens light guide unit 41, and is provided on the incident side. The light L2 reflected by the light guide reflecting surface 46 is reflected to the front side in the front-rear direction. The light guide reflection surface 46 on the incident side and the light guide reflection surface 47 on the exit side may be those that utilize total reflection, those that are subjected to reflection processing, or other configurations as long as they reflect as described above. The second lens light guide unit 41 is optically set as follows in order to efficiently guide the light L2 from the corresponding second light source 12.

As shown in FIG. 6, the second light guide incident surface 44 advances the light L2 from the second light source 12 to the region provided with the incident side light guide reflection surface 46 on the lower surface of the second lens light guide unit 41. In other words, it is refracted toward the second light guide incident surface 44 side on the lower surface of the second lens light guide unit 41. The second light guide incident surface 44 has at least a second light source 12 side, that is, a curved incident surface 44a that is convexly curved upward in the vertical direction in order to guide the light L2 in this way. The curved incident surface 44a has a center of curvature Cc on the emission light axis Li of the second light source 12, and optically positions the position of the first focal point F1 of the incident side light guide reflecting surface 46 with the second light source 12. It is a curved surface that is displaced at the position (the center of light emission). The curved incident surface 44a may be a free curved surface based on such a curved surface, or may be a curved surface whose curvature is gradually changed. That is, in the second lens light guide unit 41, the light L2 from the second light source 12 travels in a state of being refracted by the second light guide incident surface 44, but the traveling direction is emitted from the first focal point F1. This is consistent with the mode of travel of the virtual light Lv that has not been refracted by the second light guide incident surface 44.

The curved incident surface 44a may be set to an arbitrary size from the upper end 44c of the second light guide incident surface 44 in the vertical direction, and in the first embodiment, the second light source 12 is set from the upper end 44c of the second light guide incident surface 44. It is set up to the position where it intersects the emission optical axis Li. The second light guide incident surface 44 of the first embodiment is provided with a continuous flat incident surface 44b of the curved incident surface 44a at a location other than the curved incident surface 44a. The flat incident surface 44b is a flat surface orthogonal to the emitted light axis Li, and causes the light L2 from the second light source 12 to travel to the incident side light guide reflecting surface 46.

As shown in FIG. 5, the incident-side light guide reflecting surface 46 has a position on the emission optical axis Li of the second light source 12 behind the second light source 12 in the front-rear direction as the first focal point F1 and is projected. The vicinity of the rear focal point Fb of the lens 17 is a free curved surface based on an ellipse having the second focal point F2. The second focal point F2 is set in the vicinity of the upper end 45a of the second light guide emitting surface 45. Here, the second light guide incident surface 44 has a curved incident surface 44a that optically displaces the position of the first focal point F1 of the incident side light guide reflection surface 46 to the position of the second light source 12 as described above. Therefore, the incident side light guide reflecting surface 46 substantially has the second light source 12 as the first focal point F1 in consideration of the optical characteristics of the curved incident surface 44a. Further, the incident side light guide reflecting surface 46 is optically set so as to focus the light L2 from the second light source 12 passing through the flat incident surface 44b in the vicinity of the second focal point F2. Therefore, the incident side light guide reflecting surface 46 reflects the light L2 emitted from the second light source 12 and passing through the curved incident surface 44a or the flat incident surface 44b toward the second focal point F2. As a result, the light guide reflecting surface 46 on the incident side has a second focal point F2 at which the reflected light is collected as an optical design.

Here, the incident side light guide reflecting surface 46 is optically set so as to reflect the light L2 from the center position of the light emitting surface of the second light source 12 toward the second focal point F2 as a point light source. On the other hand, the light emitting surface of the second light source 12 has a predetermined area. Therefore, it is difficult for the incident side light guide reflecting surface 46 to collect all of the light L2 passing through the second light source 12 to the second light guide incident surface 44 at the second focal point F2. Therefore, the second lens light guide unit 41 is provided with a light guide reflection surface 47 on the exit side.

The light emitting side light reflecting surface 47 reflects the light L2 emitted from the second light source 12 through the second light guide incident surface 44 and reflected by the incident side light guide reflecting surface 46 toward the front side in the front-rear direction. Then, it advances to the second light guide emission surface 45. The light emitting side light reflecting surface 47 is a surface extending from the upper end 45a of the second light guide emitting surface 45 to the rear side (second light source 12 side) in the front-rear direction, and is the incident side light guide reflecting surface 46. It is curved convexly on the opposite side, that is, on the upper side in the vertical direction. The light emitting side light reflecting surface 47 of the first embodiment has a curved surface having a radius of curvature of 100 mm to 1000 mm.

Further, in the light guide reflecting surface 47 on the exit side, the tangent line Lt at the tip portion 47a on the upper end 45a side has the following positional relationship. Here, the intersection of the emission light axis Li of the second light source 12 and the light guide reflection surface 46 on the incident side is set as an intersection Ip, and the intersection Ip and the second focal point F2 (the light guide reflection surface 46 on the incident side is an optical design). The straight line connecting the point to be focused on) is defined as the leading ray Lg. The leading ray Lg is in a direction in which the light L2 from the second light source 12 using the first focal point F1 as a virtual light source is reflected by the incident side light guide reflecting surface 46 and travels to the second focal point F2. Since the light L2 on the leading ray Lg travels on the light axis Li emitted from the second light source 12, the amount of light is high. The tangent line Lt has an angle θ of 5 to 10 degrees with respect to the leading ray Lg.

Further, the leading ray Lg is orthogonal to the second light guide emitting surface 45. The second light guide emitting surface 45 of the first embodiment is a flat surface (flat surface) in a vertical cross section orthogonal to the width direction. The second light guide emitting surface 45 may be curved as long as it is orthogonal to the leading light Lg at the intersection with the leading light Lg, and is not limited to the configuration of the first embodiment.

The second light guide exit surface 45 emits the light L2 reflected by the incident side light guide reflection surface 46 and the exit side light guide reflection surface 47 toward the projection lens 17. Since the second light guide emitting surface 45 is a flat surface orthogonal to the leading light ray Lg in the vertical cross section, the light L2 passing on the leading light ray Lg is emitted without being refracted, and the other light L2 is at an angle. It is refracted according to the above and emitted. Even when the second light guide emitting surface 45 is curved as described above, since it is orthogonal to the leading light Lg at the intersection with the leading light Lg, the second light guide emitting surface 45 is on the leading light Lg. The passing light L2 is emitted without being refracted, and the other light L2 is refracted and emitted according to the angle.

By fixing the second light guide lens 15 to the lens holder or the like, the positional relationship of the second lens light guide unit 41 with respect to each of the second light source 12 and the projection lens 17 is set. Since the second light guide lens 15 does not allow light L2 to enter and exit at locations other than the second light guide incident surface 44 and the second light guide exit surface 45, aluminum, silver, or the like is formed by vapor deposition, painting, or the like at the locations other than these. The light L2 may be reflected by adhering the reflective member of the above, or the light transmission may be prevented by adhering the light-shielding member.

Next, lighting of the vehicle lamp 10 will be described. The vehicle lighting fixture 10 is provided in the lighting chamber, and an external connector is connected to the substrate 18 via a connector connecting portion. The vehicle lighting fixture 10 supplies electric power to each of the first light sources 11 and each of the second light sources 12 mounted on the substrate 18 from the lighting control circuit via the external connector and the connector connection portion, so that the first light source 11 and each of the first light sources 11 and the second light source 12 are supplied with electric power. Each second light source 12 is turned on and off as appropriate.

As shown in FIG. 2, in the vehicle lighting tool 10, when each of the first light sources 11 is turned on, the light L1 from each of the first light sources 11 is emitted from each of the first lens light guide portions 21 of the first light guide lens 14. It is incident on the first light source incident surface 22 of the above, is guided by each first lens light source unit 21, and is emitted from the first light source emission surface 23. The light L1 is projected by the projection lens 17, and as shown in FIG. 7, seven partially distributed light regions arranged in the horizontal direction below the vicinity of the position (horizontal line) of the lens axis La on the projection surface. Form lp. The seven partial distribution light regions lp are integrally formed side by side in the width direction while partially overlapping each other to form a passing light distribution pattern LP. In the passing light distribution pattern LP, a part of each light L1 is blocked by the tip edge 16a and projected by the projection lens 17 while being shaped along the tip edge 16a, so that a cut-off line CL is formed on the upper edge. It is formed.

Further, in the vehicle lamp 10, when each of the second light sources 12 is turned on, the light L2 from each of the second light sources 12 guides the light L2 from the second light guide incident surface 44 to each second lens guide of the second light guide lens 15. It is incident on the light unit 41. In each of the second lens light guide units 41, the incident side light guide reflecting surface 46 reflects the light L2 incident on the second light guide incident surface 44 toward the second focal point F2. A part of the light L2 reflected by the incident side light guide reflecting surface 46 travels directly to the second light guide emitting surface 45, and the other part is reflected by the emitting side light guide reflecting surface 47 to lead the second guide. It proceeds to the light emitting surface 45. The light L2 is emitted from the second light guide emitting surface 45 and travels to the vicinity of the second focal point F2, that is, the rear focal point Fb of the projection lens 17. The light L2 travels to the projection lens 17 and is projected by the projection lens 17, and as shown in FIG. 8, is horizontal on the projection surface above the vicinity of the position (horizontal line) of the lens axis La. Twelve partially distributed optical regions hp arranged in the direction are formed. The twelve partially distributed light regions hp are integrally formed side by side in the width direction while partially overlapping each other to form a traveling light distribution pattern HP. Therefore, the vehicle lighting fixture 10 can form the traveling light distribution pattern HP so that the lower end portion overlaps the upper end portion of the passing light distribution pattern LP with the light L2 from each of the second light sources 12.

The vehicle lighting fixture 10 of the first embodiment is an ADB (Adaptive Driving Beam (variable light distribution type headlight)), and by turning on and off each second light source 12 individually, 12 partial distribution light regions The part distribution light region hp in a specific direction of the hp can be turned on and off. As a result, the vehicle lamp 10 enables partial light distribution control in an arbitrary direction in the traveling light distribution pattern HP.

According to the above description, the vehicle lighting fixture 10 can form a passing light distribution pattern LP having a cut-off line CL as shown in FIG. 7 by turning on each of the first light sources 11, and the light distribution at the time of passing (light distribution at the time of passing). It can be a so-called low beam). Further, as shown in FIG. 9, the vehicle lighting tool 10 is superposed on the passing light distribution pattern LP by turning on each of the second light sources 12 in addition to the first light source 11, and the traveling light distribution pattern. The HP can be formed, and the light distribution during traveling (so-called high beam) can be obtained. Then, as described above, the vehicle lamp 10 can individually control the arbitrary part distribution light region hp in the traveling light distribution pattern HP by turning on and off each of the second light sources 12 individually. , ADB functions can also be realized.

Next, the operation in the vehicle lamp 10 will be described. The second light guide lens 15 has a curved incident surface 44a having a curved surface that is convex toward the second light source 12 at least in a part of the second light incident surface 44 of each second lens light guide unit 41. The second light guide incident surface 44 is a second lens light guide unit 41 when the light L2 emitted from the second light source 12 is incident on the second lens light guide unit 41 due to the condensing action of the curved incident surface 44a. It can be refracted toward the second light guide incident surface 44 side on the lower surface of the light guide. Therefore, the second light guide lens 15 can set the direction in which the light L2 from the second light source 12 travels toward the second light guide incident surface 44 side, and directs the light L2 to the second focal point F2 of the incident side light guide reflection surface 46. Can lead to. In particular, in the second light guide lens 15 of the first embodiment, the second light guide incident surface 44 allows the light L2 from the second light source 12 to be transmitted to the incident side light guide reflection surface 46 on the lower surface of the second lens light guide unit 41. It is supposed to proceed to the area where is provided.

As an example of this, in FIG. 5, the light L2 emitted from the second light source 12 is not provided with the light L2a refracted by the curved incident surface 44a of the second light guide incident surface 44 and the curved incident surface 44a. The light L2b refracted by the flat second light guide incident surface 44 (the flat incident surface 44b extended to the curved incident surface 44a side) is shown. The light L2a travels to a region on the lower surface of the second lens light guide unit 41 where the incident side light guide reflecting surface 46 is provided, and is reflected by the incident side light guide reflecting surface 46 toward the second focal point F2. Then, it proceeds to the projection lens 17 through the second light guide emitting surface 45. On the other hand, the light L2b travels to the front side in the front-rear direction from the region on the lower surface of the second lens light guide unit 41 where the incident side light guide reflection surface 46 is provided. Therefore, the light L2b is reflected at a location that is not set as the incident side light guide reflection surface 46, so that the light L2b travels to a position further downward from the second focal point F2, and the second light guide is transmitted from that position. It proceeds to the projection lens 17 through the exit surface 45. Therefore, the second light guide lens 15 appropriately guides the light L2 from the second light source 12 to the light guide reflection surface 46 on the incident side by providing the curved light incident surface 44a on the second light guide incident surface 44. Can be done. As a result, the second light guide lens 15 appropriately projects the light L2 so that the mode in which the light L2 from the second light source 12 actually travels has a desired luminous intensity distribution as the traveling light distribution pattern HP. Can lead to.

Further, in the second light guide lens 15, the incident side light guide reflection surface 46 is set at a position on the emission light axis Li of the second light source 12 behind the second light source 12 in the front-rear direction as the first focal point F1. At the same time, the vicinity of the rear focal point Fb of the projection lens 17 is a free curved surface based on an ellipse having the second focal point F2. Further, the second light guide lens 15 of the first embodiment optically displaces the position of the first focal point F1 of the light guide reflecting surface 46 on the incident side to the position of the corresponding second light source 12 (the center of light emission thereof). It has a curved incident surface 44a to be made to. In addition, the incident side light guide reflecting surface 46 concentrates the light L2 from the second light source 12 passing through the flat incident surface 44b of the second light guide incident surface 44 in the vicinity of the second focal point F2. Is also set optically. Therefore, when the second light guide lens 15 reflects the light L2 from the second light source 12 through the second light guide incident surface 44 on the incident side light guide reflecting surface 46, the second light guide reflecting surface 46 of the incident side light guide reflecting surface 46. It can be advanced to bifocal F2. Therefore, the second light guide lens 15 can concentrate the light on the center (lens axis La) side where the vertical line and the horizontal line intersect on the projection surface, and the distant visibility can be improved.

Further, the second light guide lens 15 has a light emitting side light reflecting surface 47 having a curved surface that is convex on the side opposite to the incident side light guide reflecting surface 46. Therefore, the light emitting side light emitting surface 47 is directed toward the second light guide emitting surface 45 while suppressing the light L2 reflected by the incident side light guide reflecting surface 46 from spreading in the second lens light guide unit 41. It can be reflected and the light L2 can be appropriately guided to the projection lens 17 as a result. In particular, in the second light guide lens 15 of the first embodiment, the tangent line Lt at the tip portion 47a leads a straight line connecting the intersection Ip of the emission light axis Li and the light guide reflection surface 46 on the incident side and the second focal point F2. The light emitting side light reflecting surface 47 is set so as to form an angle θ of 5 to 10 degrees with respect to Lg. Therefore, the light emitting side light guide reflecting surface 47 can reflect the light L2 reflected by the incident side light guide reflecting surface 46 toward the vicinity of the second focal point F2, that is, the vicinity of the lens axis La. Therefore, the second light guide lens 15 can concentrate the light on the center (lens axis La) side on the projection surface, and the distant visibility can be improved.

As an example of this, in FIG. 5, with respect to the light L2 reflected by the incident side light guide reflection surface 46, the light L2c reflected by the exit side light guide reflection surface 47 and the light exit side light guide reflection surface made flat. The light L2d reflected at 47 (the position of the tangent line Lt) is shown. The light L2c travels in the vicinity of the second focal point F2, whereas the light L2d travels downward from the light L2c. This is because the light emitting side light reflecting surface 47 can be curved as described above so that the angle with respect to the leading light ray Lg can be made smaller than the tangent line Lt, and the leading light ray Lg is the light guide on the incident side from the first focal point F1. This is due to the fact that the light L2 is reflected by the reflecting surface 46 and travels toward the second focal point F2. Therefore, the second light guide lens 15 causes the light L2 from the second light source 12 to move to the vicinity of the second focal point F2, that is, to the vicinity of the lens axis La by curving the light emitting side light guide reflection surface 47 as described above. It can be directed and reflected, and can be appropriately guided to the projection lens 17.

The second light guide lens 15 has the second light guide emission surface 45 as a flat surface in the vertical cross section and is orthogonal to the leading light beam Lg. Therefore, the second light guide lens 15 does not refract the light L2 having a high amount of light passing on the leading light ray Lg from the second light source 12 on the second light guide emission surface 45, and the second light guide emission surface 45 thereof. Can be emitted from. From this, the second light guide lens 15 can efficiently utilize the light L2 from the second light source 12 to form the light distribution region hp for each part, that is, the light distribution pattern HP for traveling (see FIG. 8).

The second light guide lens 15 is composed of each second lens light guide portion 41 in which the divided rod-shaped portion 42 is integrated with the plate-shaped portion 43. Therefore, each second lens light guide unit 41 guides the light L2 from the second light source 12 to the projection lens 17 while suppressing the spread of the light L2 from the individually corresponding second light source 12. Can be done. As a result, the second light guide lens 15 can collect and brighten the light while suppressing the expansion of the distributed light region hp of each part. In particular, the second light guide lens 15 of the first embodiment increases the proportion of the rod-shaped portions 42 that expand in the width direction from the inside to the outside in the width direction. Therefore, the second light guide lens 15 has the smallest width dimension of the two central divided light regions hp to collect light and increase the luminous intensity, and the width is increased so that the position of the divided light region hp is on the outside. Increase the size to disperse the light and reduce the luminosity. Here, in the traveling light distribution pattern HP, the luminous intensity near the center (lens axis La) where the vertical line and the horizontal line intersect is the highest (so-called hot zone), and the luminous intensity on the outer side in the width direction is low. Is required. As a result, the second light guide lens 15 can form the traveling light distribution pattern HP with an appropriate luminous intensity distribution by setting the width dimension of each rod-shaped portion 42 as described above.

The vehicle lamp 10 of the first embodiment can obtain the following effects.

In the vehicle lamp 10, each second lens light guide portion 41 has a second light guide incident surface 44 facing the second light source 12, and at least a part of the second light guide incident surface 44 is the second light source 12. It is a curved surface that is convex to the side. Therefore, when the light L2 emitted from the second light source 12 is incident on the second lens light guide unit 41, the vehicle lamp 10 is located on the front side (projection lens 17 side) in the front-rear direction in the second lens light guide unit 41. ) Can be suppressed, and the light L2 can be appropriately guided to the projection lens 17. As a result, the vehicle lamp 10 projects the light L2 from each of the second light sources 12 guided by each of the second light guide lenses 15 with the projection lens 17, so that the distributed light region hp of each part is blurred and optically. It is possible to suppress the brightness from protruding from the area designed in. Therefore, the vehicle lamp 10 can be clearly formed by suppressing blurring and spreading of each part distribution light region hp.

Further, in the vehicle lighting equipment 10, the light guide unit 41 of the second lens includes the intersection Ip that intersects the emission light axis Li of the second light source 12, and reflects the light L2 from the second light source 12. The light guide reflecting surface 46 on the incident side. And a second light source emitting surface 45 that emits the light L2 reflected by the incident side light source reflecting surface 46. Then, in the vehicle lamp 10, the incident side light guide reflecting surface 46 is a curved surface that focuses the light L2 from the second light source 12 in the vicinity of the rear focal point Fb of the projection lens 17 by reflection. Therefore, in the vehicle lamp 10, each second lens light guide unit 41 can guide the light L2 emitted from the second light source 12 to the vicinity of the second focal point F2, and each unit is projected by the projection lens 17. The distributed light region hp can be clearly formed.

Further, in the vehicle lamp 10, the incident side light guide reflecting surface 46 is provided on the lower surface in the vertical direction in the vicinity of the second light guide incident surface 44 in the second lens light guide unit 41. Further, in the vehicle lighting fixture 10, the second light guide incident surface 44 receives the light from the second light source 12 on the lower surface of the second lens light guide unit 41 on the side where the second light guide incident surface 44 is provided (the second light guide incident surface 44). It is a curved surface that refracts to the side). Therefore, the vehicle lamp 10 can guide the light L2 from the corresponding second light source 12 through the second light guide incident surface 44 to the incident side light guide reflection surface 46 in each second light guide lens 15. , The light L2 can be more appropriately guided to the projection lens 17.

In the vehicle lighting equipment 10, each second lens light guide unit 41 reflects a part of the light L2 reflected by the incident side light guide reflection surface 46 toward the second light guide emission surface 45. It has a surface 47, and the light emitting side light reflecting surface 47 thereof has a curved surface that is convex on the side opposite to the light emitting side light reflecting surface 46 on the incident side. Therefore, the light emitting side light guide reflecting surface 47 can reflect the light L2 reflected by the incident side light guide reflecting surface 46 toward the projection lens 17 while suppressing the light L2 from spreading in the second lens light guide unit 41. As a result, the vehicle lamp 10 can appropriately guide the light L2 to the projection lens 17.

The vehicle lighting tool 10 has a tangent line Lt at the tip portion 47a on the second light guide emission surface 45 side on the light emission reflection surface 47 with respect to a leading light ray Lg which is a straight line connecting the intersection Ip and the second focal point F2. The angle θ is 5 to 10 degrees. Therefore, the light emitting side light guide reflecting surface 47 can reflect the light L2 reflected by the incident side light guide reflecting surface 46 toward the vicinity of the second focal point F2. As a result, the vehicle lamp 10 can appropriately guide the light L2 to the projection lens 17.

In the vehicle lamp 10, the second light guide emitting surface 45 is orthogonal to the leading light beam Lg connecting the intersection Ip and the second focal point F2. Therefore, the second light guide lens 15 can emit light L2 having a high amount of light passing on the leading light ray Lg from the second light source 12 from the second light guide emission surface 45 without refraction. As a result, the vehicle lamp 10 can appropriately guide the light L2 to the projection lens 17.

Therefore, the vehicle lighting equipment 10 of the first embodiment as the vehicle lighting equipment according to the present disclosure can clearly form the distribution light region hp of each part of the traveling light distribution pattern HP.

Although the vehicle lamps of the present disclosure have been described based on the first embodiment, the specific configuration is not limited to the first embodiment and deviates from the gist of the invention according to each claim of the claims. Unless otherwise, design changes and additions are allowed.

In the first embodiment, the function of the ADB can be realized by individually controlling the turning on and off of the light distribution region hp of each part in the traveling light distribution pattern HP. However, the vehicle lamp 10 projects the light L1 from the first light source 11 with the projection lens 17 to form a light distribution pattern LP for passing each other, and the light L2 from each of the second light sources 12 is directed to the lens light guide unit (the first). It is not limited to the configuration of the first embodiment as long as it is projected by the guiding projection lens 17 by the two-lens light source unit 41) to form the traveling light distribution pattern HP including the light distribution region hp of each part.

Further, in the first embodiment, twelve second lens light guide portions 41 of the second light guide lens 15 are provided, and the second lens light guide portions 41 thereof are arranged side by side at intervals in the width direction. It is composed of a long rod-shaped portion 42 and a plate-shaped portion 43 that integrates them. However, if the second light guide lens 15 has a second lens light guide portion 41 individually corresponding to each second light source 12, the second light guide lens 15 is composed of only the rod-shaped portion 42 without the plate-shaped portion 43, that is, separated. It may be composed of 12 rod-shaped portions (42), and is not limited to the configuration of the first embodiment. In this case, the twelve rod-shaped portions (42) may be arranged at intervals or may be arranged in contact with each other. Further, for example, of the 12 rod-shaped portions (42), 6 rod-shaped portions (42) in an odd order from one side are integrated by a first connecting portion extending in the width direction, and the remaining one side. Six rod-shaped portions (42) in an even-numbered order may be integrated by a second connecting portion extending in the width direction, and the twelve rod-shaped portions (42) may be meshed with each other so as to be arranged in order. .. In this case, since it can be configured as two parts in which six rod-shaped portions (42) are lined up, each rod-shaped portion (42) can be appropriately formed even when injection molding or the like is used, for example. This is because if the 12 rod-shaped portions (42) are integrated, the rod-shaped portions (42) will be lined up at narrow intervals or in contact with each other, which may make it difficult to form by injection molding or the like. by.

Further, in the first embodiment, 12 second lens light guides 41 and 12 second light sources 12 are provided. However, the number of the second lens light guide unit 41 and the second light source 12 may be appropriately set according to the number of the unit-distributed light regions hp to be formed and the size and shape of the traveling light distribution pattern HP by them. It is not limited to the configuration of Example 1.

In the first embodiment, the light emitting side light reflecting surface 47 is a curved surface having a radius of curvature of 100 mm to 1000 mm. However, the light emitting side light reflecting surface 47 is convexly curved to the side opposite to the incident side light guide reflecting surface 46, and the light L2 reflected by the incident side light guide reflecting surface 46 is transferred to the second lens light guide unit. If the light is reflected toward the second light guide emitting surface 45 while suppressing the spread within 41, the radius of curvature may be appropriately set and is not limited to the configuration of the first embodiment.

In the first embodiment, the light emitting side light reflecting surface 47 is a surface extending from the upper end 45a of the second light guide emitting surface 45 to the rear side in the front-rear direction, and is continuous with the second light guide emitting surface 45. However, the light emitting side light emitting surface 47 reflects the light L2 reflected by the incident side light guide reflecting surface 46 toward the second light guide emitting surface 45 while suppressing the light L2 from spreading in the second lens light guide unit 41. As long as it does, it does not have to be continuous with the second light guide emitting surface 45, and is not limited to the configuration of the first embodiment.

In the first embodiment, the second light guide incident surface 44 has a curved incident surface 44a set as described above. However, the second light guide incident surface 44 refracts the light L2 from the second light source 12 toward the second light guide incident surface 44 on the lower surface of the second lens light guide unit 41, and reflects the light L2 on the incident side. It is not limited to the configuration of the first embodiment as long as it is set so as to advance to the region where the surface 46 is provided. For example, the second light guide incident surface 44 (the curved incident surface 44a) may be a free curved surface based on a curved surface having a curvature center Cc on the emission optical axis Li of the second light source 12, and is optically first. A free curved surface based on a curved surface that shifts the position of the focal point F1 to the position of the second light source 12 (the center of light emission thereof) may be used. That is, the curved incident surface 44a of the first embodiment is set based on the optical ideas of both of the two, but may be set based on the optical idea of either one. In addition, the shape of the curved incident surface 44a may be appropriately set as long as the light L2 from the second light source 12 is refracted toward the second light guide incident surface 44 on the lower surface of the second lens light guide unit 41. , The configuration is not limited to the first embodiment.

10 Vehicle lighting equipment 11 1st light source 12 2nd light source 17 Projection lens 41 (as an example of lens light guide unit) 2nd lens light guide unit 44 (as an example of light guide incident surface) 2nd light guide incident surface 45 Second light guide emission surface (as an example of the light guide emission surface) 46 (As an example of the light guide reflection surface) Incident side light guide reflection surface 47 Exit side light guide reflection surface 47a Tip part F1 First focus F2 Second Focus Fb Rear focus HP Traveling light distribution pattern hp Part distribution light region Ip Intersection L light Lg (as an example of a straight line) Leading light Li Emitting light axis LP Passing light distribution pattern Lt tangent

Claims (6)

A first light source that emits light that forms a light distribution pattern for passing,
A plurality of second light sources that emit light forming a traveling light distribution pattern composed of a plurality of partially distributed light regions, and a plurality of second light sources.
The light from the first light source is projected onto the front of the vehicle to form the passing light distribution pattern, and the light from the plurality of second light sources is projected onto the front of the vehicle to form the traveling light distribution pattern. With a projection lens
A plurality of lens light guides, which are individually provided for the plurality of the second light sources and guide the light emitted from the corresponding second light sources to the projection lens, are provided.
The lens light guide portion has a light guide incident surface facing the second light source.
A vehicle lighting fixture, wherein the light guide incident surface is a curved surface having at least a part convex toward the second light source side. The lens light guide unit includes a light guide reflecting surface that includes an intersection with an exit light axis of the second light source and reflects light from the second light source, and a guide that emits light reflected by the light guide reflecting surface. Has a light emitting surface,
The vehicle lamp according to claim 1, wherein the light guide reflecting surface is a curved surface that collects light from the second light source in the vicinity of the rear focal point of the projection lens by reflection. The light guide reflecting surface is an incident side light guide reflecting surface provided on the lower lower surface in the vertical direction in the vicinity of the light guide incident surface in the lens light guide portion.
The vehicle lamp according to claim 2, wherein the light guide incident surface is a curved surface that refracts light from the second light source toward the light guide incident surface side on the lower surface of the lens light guide portion. The lens light guide portion has an exit side light guide reflecting surface that reflects a part of the light reflected by the incident side light guide reflection surface toward the light guide emission surface.
The vehicle lighting fixture according to claim 3, wherein the light emitting side light reflecting surface is a curved surface that is convex on the side opposite to the light emitting light reflecting surface on the incident side. The light guide reflection surface on the exit side has a tangent line at the tip on the light guide exit surface side of 5 to 10 degrees with respect to a straight line connecting the intersection and the point where the light guide reflection surface on the incident side collects light. The vehicle lighting device according to claim 4, wherein the angle is formed. The vehicle lighting tool according to claim 5, wherein the light guide emitting surface is orthogonal to a straight line connecting the intersection and the point where the reflected light from the incident side light guide reflecting surface is collected.

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