Vehicle lighting fixture

Abstract

To provide a technology increasing the number of light emission parts while suppressing increase in the number of light sources.SOLUTION: A vehicle lighting fixture 1 includes: a light source 6; a rotation reflector 8 having a reflection surface 8a; a light guide part 4 having a plurality of incident parts 4a into which light L reflected on the reflection surface 8a is incident, and a plurality of light emission parts 4b which emit the light incident into each of the incident parts 4a; a plurality of light emission parts 2 emitting the light L from each of the light emission parts 4b toward the front of the lighting fixture; and a control part controlling the light source 6. The rotation reflector 8 rotates and thereby switches the reflection direction of the light L to each of the incident parts 4a in order. The control part controls the light source 6 so that the light L is selectively incident to the prescribed incident part 4a.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to vehicle lamps.

Background Art

[0002] Conventionally, a technique is known in which communication lamps for indicating the state of a vehicle and the intention of a driver of the vehicle to traffic participants such as pedestrians and other vehicles are mounted on a grill portion or the like of the vehicle (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to display more diverse information with communication lamps, it is desirable to have a large number of light emitting portions. However, in conventional communication lamps, one or more light sources are associated with each light emitting portion. For this reason, increasing the number of light emitting portions increases the number of light sources, which may lead to complication of the lamp structure and cost increase.

[0005] The present invention has been made in view of such circumstances, and one of its objects is to provide a technique for increasing the number of light emitting portions while suppressing an increase in the number of light sources.

Means for Solving the Problems

[0006] One aspect of the present invention is a vehicle lamp. This vehicle lamp includes a light source, a rotating reflector having a reflecting surface that reflects the light of the light source, a plurality of incident portions into which the light reflected by the reflecting surface is incident, and a light guide portion having a plurality of emission portions that emit the light incident on each incident portion, a plurality of light emitting portions into which the light emitted from each emission portion is incident and that emit the light forward of the lamp, and a control portion that controls the lighting state of the light source. The rotating reflector sequentially switches the reflection direction of the light to each incident portion by rotation. The control portion controls the lighting state of the light source so that the light selectively enters a predetermined incident portion.

[0007] In addition, any combination of the above components, and those obtained by converting the expression of the present invention among methods, apparatuses, systems, etc., are also effective as aspects of the present invention.

Advantages of the Invention

[0008] According to the present invention, it is possible to increase the number of light emitting portions while suppressing an increase in the number of light sources.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0010] Hereinafter, the present invention will be described with reference to the drawings based on preferred embodiments. The embodiments are illustrative rather than limiting the invention, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention. The same or equivalent components, members, and processes shown in each drawing are denoted by the same reference numerals, and repeated explanations will be omitted as appropriate. Also, the scales and shapes of the respective parts shown in each figure are set for convenience in order to facilitate the explanation, and are not to be construed restrictively unless otherwise specified. Further, when terms such as "first" and "second" are used in this specification or claims, these terms do not represent any order or importance unless otherwise specified, and are for distinguishing one configuration from another. Also, in each drawing, some of the members that are not important in explaining the embodiment are omitted from the display.

[0011] FIG. 1(A) is a cross-sectional view of the front part of a vehicle V equipped with a vehicle lamp 1 according to an embodiment. FIG. 1(B) is a schematic diagram showing a state in which the vehicle lamp 1 is lit. The vehicle lamp 1 is a communication lamp mounted on the vehicle V. As an example, in the vehicle lamp 1, a plurality of light-emitting parts 2 are arranged in a grille G at the front of the vehicle V and function as a so-called grille lamp. Note that the light-emitting part 2 may be arranged at a location other than the grille G of the vehicle V.

[0012] Each light-emitting part 2 has, for example, a known light-transmitting plate. The light-transmitting plate has a reflecting element such as a light-reflecting step on the surface facing the rear side of the lamp, and emits light from the surface facing the front side of the lamp. Note that the structure of the light-emitting part 2 is not particularly limited. A light guide part 4 composed of an optical fiber or the like is connected to each light-emitting part 2, and light L is incident on each light-emitting part 2 from a light distribution unit 25 (see FIG. 2 etc.) via the light guide part 4.

[0013] Each light emitting unit 2 can emit light independently of each other. By changing the light emitting states of the light emitting units 2 in cooperation, for example, the charging state of the vehicle V; welcome effects or farewell effects; the vehicle V entering the drivable state or starting to drive; whether the vehicle V is in the automatic driving state or the manual driving state; the speed of the vehicle V; the distance between the vehicle V and other vehicles; the intention of the driver of the vehicle V towards traffic participants; the vehicle V changing its traveling direction; an abnormality occurring inside the vehicle V; the vehicle V making an emergency stop; the occurrence of unauthorized access to the vehicle V from the outside, and various other information can be displayed.

[0014] Subsequently, the structure of the vehicle lamp 1 will be described in detail. FIG. 2 is a perspective view of the vehicle lamp 1. In FIG. 2, a state in which a part of the container 24 and the lid 26 is cut away is shown. Also, the illustration of some of the wall portions 16 is omitted. FIG. 3 is an exploded perspective view of the vehicle lamp 1. FIG. 4 is a cross-sectional view of the vehicle lamp 1. FIG. 4 shows a cross-section along the rotation axis Ax of the rotary reflector 8. Also, in FIG. 4, a state in which the lid 26 is shown in a transparent manner is illustrated. FIG. 5 is a cross-sectional view of the vehicle lamp 1. FIG. 5 shows a cross-section orthogonal to the rotation axis Ax of the rotary reflector 8. In FIGS. 2 to 5, the illustration of the light emitting unit 2 is omitted.

[0015] The vehicle lamp 1 includes a light source 6, a rotary reflector 8, a light guide unit 4, a plurality of light emitting units 2 (see FIG. 1), and a control unit 10. Further, the vehicle lamp 1 of the present embodiment has a structure in which a plurality of light source units 12 including the light source 6 and the light guide unit 4 are stacked. Therefore, the vehicle lamp 1 also includes a plurality of light sources 6 and light guide units 4 respectively. Note that the vehicle lamp 1 of the present embodiment has five light source units 12, but the number of the light source units 12 is not particularly limited and may be one or a plurality other than five.

[0016] In addition, the vehicle lamp 1 includes a collimator lens portion 14, a wall portion 16, a fan 18, a heat sink 20, and a duct 22. Each light source unit 12 includes the collimator lens portion 14 and the wall portion 16 in addition to the light source 6 and the light guide portion 4. Therefore, the vehicle lamp 1 also includes a plurality of collimator lens portions 14 and wall portions 16 respectively. Further, the vehicle lamp 1 includes a container 24 and a lid 26. The container 24 has an opening on one side. The lid 26 is coupled to the container 24 by a known method such as lance engagement and closes the opening of the container 24. In the space defined by the container 24 and the lid 26, each member of the vehicle lamp 1 except for a part of the light guide portion 4 and the light emitting portion 2 is accommodated. The container 24 and the lid 26, and each member accommodated in the space defined by these constitute the light distribution unit 25.

[0017] Each light source 6 is mounted on the main surface of the light source substrate 28 facing the rotating reflector 8 side. As an example, each light source 6 is mounted on the same light source substrate 28 with a predetermined interval therebetween. When viewed from the axial direction of the rotating reflector 8, that is, the direction in which the rotation axis Ax extends, the posture of each light source 6 is determined so as to emit light L in the same direction. The light source 6 is composed of, for example, an LED (light emitting diode). Note that the light source 6 may be a semiconductor light emitting element other than an LED such as an LD (laser diode), organic or inorganic EL (electroluminescence). Further, the light source 6 may be an incandescent bulb, a halogen lamp, a discharge bulb, or the like.

[0018] The heat sink 20 is fixed to the main surface of the light source substrate 28 on the side opposite to the side where the light source 6 is disposed. Thereby, the heat sink 20 is connected to the light source 6 so as to be capable of heat exchange. The heat generated by each light source 6 is transmitted to the heat sink 20 via the light source substrate 28. As a result, each light source 6 is cooled.

[0019] The light L of each light source 6 is emitted toward the rotary reflector 8. A collimator lens unit 14 is disposed in the optical path 30 of the light L from the light source 6 toward the rotary reflector 8. The collimator lens unit 14 includes a first lens 32 and a second lens 34 disposed closer to the rotary reflector 8 than the first lens 32. The collimator lens unit 14 will be described in detail later.

[0020] A part of at least the region between the second lens 34 and the rotary reflector 8 in the optical path 30 is partitioned by a wall portion 16. The wall portion 16 of the present embodiment extends from the light source substrate 28 to the side of the rotary reflector 8 rather than the collimator lens unit 14, and also functions as a holder for the light source substrate 28 and the collimator lens unit 14. Further, the wall portion 16 extends along an inner lens 38 described later and also functions as a holder for the inner lens 38. Further, the wall portion 16 belonging to a part of the light source units 12 partitions the optical path 30 in the light source unit 12 on one main surface and partitions the optical path 30 in the adjacent light source unit 12 on the other main surface. The wall portion 16 has light absorption properties and can absorb the light L. For example, the wall portion 16 is made of a light-absorbing resin such as a black resin, or a light-absorbing paint such as black paint is applied to the wall surface.

[0021] The rotary reflector 8 has a reflecting surface 8a that reflects the light L of the light source 6 and reflects the light L toward the light guide unit 4. The rotary reflector 8 can change the reflection direction of the light L by rotating about the rotation axis Ax to change the angle of the reflecting surface 8a. A drive unit 36 composed of, for example, a known DC motor or the like is connected to the rotation axis Ax. When the drive unit 36 is driven, the rotary reflector 8 rotates.

[0022] The rotating reflector 8 of the present embodiment has a polygon mirror. Each mirror surface of the polygon mirror constitutes a reflecting surface 8a. And the rotating reflector 8 extends in the stacking direction of the plurality of light source units 12 and reflects the light L of the light source 6 of each light source unit 12. That is, the rotating reflector 8 is shared by the plurality of light source units 12. The rotating reflector 8 of the present embodiment has six reflecting surfaces 8a. Therefore, each reflecting surface 8a can reflect the light L within a range of ±30° with respect to the incident direction of the light L. Note that the number of the reflecting surfaces 8a is not particularly limited. Further, the rotating reflector 8 may have a blade-type mirror in which a blade having a curved reflecting surface 8a is attached to a rotation axis.

[0023] The light guide part 4 of each light source unit 12 has a plurality of incident parts 4a and a plurality of emission parts 4b. Each incident part 4a is a part where the light L reflected by the reflecting surface 8a is incident. The light L of the same light source 6 is incident on the plurality of incident parts 4a in each light guide part 4. That is, a plurality of incident parts 4a are assigned to one light source 6. Each emission part 4b is associated with each incident part 4a in a one-to-one correspondence and emits the light L incident on the corresponding incident part 4a. Note that the incident part 4a and the emission part 4b may be associated in a one-to-many correspondence or a many-to-one correspondence.

[0024] Each emission part 4b is associated with each light emitting part 2 in a one-to-one correspondence and emits light to the corresponding light emitting part 2 (see Fig. 1(A)). Each light emitting part 2 receives the light L emitted from each emission part 4b and emits the light L forward of the lamp fixture. Thereby, each light emitting part 2 emits light. Note that the emission part 4b and the light emitting part 2 may be associated in a one-to-many correspondence or a many-to-one correspondence.

[0025] Each light guide unit 4 of the present embodiment includes an inner lens 38, an optical fiber 40, and a connector 42. Each light guide unit 4 has two inner lenses 38. The two inner lenses 38 are arranged so as to sandwich the light source 6 in the rotation direction of the rotary reflector 8, that is, in the circumferential direction of the rotation axis Ax. Each inner lens 38 is made of a resin having translucency as an example. Examples of the resin constituting the inner lens 38 include polycarbonate, polypropylene, acrylic, ASA (acrylonitrile-styrene-acrylate), and ABS (acrylonitrile-butadiene-styrene).

[0026] Each inner lens 38 has a structure in which a plurality of translucent rod bodies are arranged in the rotation direction of the rotary reflector 8. One end of each rod body faces the rotary reflector 8 side, and an incident portion 4a is arranged on the end face of the end. Therefore, each incident portion 4a is arranged in the scanning direction of the light L by the reflecting surface 8a. The side surfaces of the two rod bodies adjacent to each other are connected to each other. That is, the plurality of rod bodies are integrally formed. Note that the plurality of rod bodies may be separate from each other.

[0027] The container 24 is provided with an insertion port 24a for the connector 42. The other end of each rod body extends to the vicinity of the insertion port 24a. One end of each optical fiber 40 is inserted into the connector 42. In a state where the connector 42 is inserted into the insertion port 24a and fixed to the container 24, the other end of each rod body and one end of each optical fiber 40 are connected to each other. An emission portion 4b is arranged at the other end of each optical fiber 40. By connecting the inner lens 38 and the optical fiber 40 via the connector 42, the light distribution unit 25 and the light emitting unit 2 can be easily attached and detached, and the degree of freedom in arranging the light distribution unit 25 can be increased.

[0028] Note that the structure of the light guide unit 4 is not particularly limited. For example, the number of each of the inner lens 38, the rod body, and the optical fiber 40 may be other than the numbers shown in the figure. Further, the inner lens 38 may be plate-shaped or the like. Further, a plurality of emission portions 4b may be arranged on the inner lens 38, and the inner lens 38 may be directly connected to each light emitting portion 2. However, by interposing the optical fiber 40 between the inner lens 38 and the light emitting portion 2, the degree of freedom in the positional relationship between the light distribution unit 25 and the light emitting portion 2 can be increased. Further, the emission portion 4b may function as the light emitting portion 2.

[0029] The control unit 10 controls the lighting state of each light source 6. As an example, the control unit 10 can be configured by a digital processor, and is configured by, for example, a combination of a microcomputer including a CPU and a software program. Note that the control unit 10 may be configured by an FPGA (Field Programmable Gate Array), an ASIC (Application Specified IC), or the like.

[0030] The control unit 10 is electrically connected to the light source substrate 28 via the wiring 44. By switching the lighting and extinguishing of each light source 6 in synchronization with the rotation of the rotary reflector 8 by the control unit 10, the light L of each light source 6 can be made to enter a predetermined incident portion 4a. That is, the rotary reflector 8 switches the reflection direction of the light L to each incident portion 4a in order by changing the angle of the reflecting surface 8a due to rotation. The control unit 10 controls the lighting state of the light source 6 in accordance with the angle of the reflecting surface 8a so that the light L selectively enters a predetermined incident portion 4a.

[0031] More specifically, when the reflection direction of the light L by the reflecting surface 8a faces the incident portion 4a connected to the light emitting portion 2 that is desired to emit light, the light source 6 is lit. Further, when the reflection direction faces another incident portion 4a, the light source 6 is extinguished. The light L that has entered the incident portion 4a enters the optical fiber 40 from the inner lens 38 and enters the light emitting portion 2 from the optical fiber 40. Thereby, the light emitting portion 2 to be made to emit light can be arbitrarily selected, and various light emission patterns can be formed. Note that the control unit 10 may also control the rotation of the rotary reflector 8.

[0032] The control unit 10 of the present embodiment is composed of a control board, and is arranged side by side with a plurality of light source units 12 in the axial direction of the rotary reflector 8, with one main surface facing the light source unit 12 side. The other main surface of the control unit 10 is covered with a substantially plate-shaped base member 46. The rotation axis Ax of the rotary reflector 8 penetrates the control unit 10 and the base member 46. A fan 18 is connected to the tip protruding from the base member 46 on the rotation axis Ax. The fan 18 is, for example, a known centrifugal fan and rotates together with the rotary reflector 8.

[0033] The main surface of the base member 46 on the fan 18 side is covered with a lid 26. The lid 26 has an air intake 26a penetrating the lid 26 at a position overlapping the rotation axis Ax. The base member 46 has an exhaust port 46a penetrating the base member 46 at a position overlapping the heat sink 20. A duct 22, in other words, an air passage forming structure, is arranged on the main surface of the base member 46 on the fan 18 side. The base member 46 has a partition wall 46b protruding from the main surface and extending from the fan 18 to the exhaust port 46a. The duct 22 is defined by the main surface of the base member 46, the partition wall 46b, and the main surface of the lid 26.

[0034] The duct 22 connects the fan 18 and the heat sink 20. Specifically, one end of the duct 22 communicates with the fan 18. The other end of the duct 22 communicates with the exhaust port 46a. When the fan 18 rotates together with the rotary reflector 8, external air flows into the inside of the light distribution unit 25 through the air intake 26a. This air reaches the exhaust port 46a through the duct 22 and is sent from the exhaust port 46a to the heat sink 20. Thereby, the heat sink 20 can be air-cooled.

[0035] Next, the collimator lens unit 14 will be described in detail. FIG. 6 is an enlarged view of the dashed-line region R in FIG. 5. The first lens 32 is disposed closer to the light source 6 than the second lens 34. The first lens 32 has a light incident surface 32a facing the light source 6 and a light exit surface 32b facing the second lens 34 side. The second lens 34 has a light incident surface 34a facing the light exit surface 32b and a light exit surface 34b facing the rotary reflector 8 side.

[0036] The light incident surface 34a of the second lens 34 is smaller than the light incident surface 32a of the first lens 32. That is, the size of the light incident surface 34a as viewed from the arrangement direction of the light source 6 and the rotary reflector 8 is smaller than the size of the light incident surface 32a as viewed from the arrangement direction. In the present embodiment, the light incident surface 34a is smaller than the light exit surface 32b as viewed from the arrangement direction, and the light exit surface 34b is also smaller than the light incident surface 32a and the light exit surface 32b. Further, the size of the first lens 32 is smaller than the heat sink 20.

[0037] The light L of the light source 6 reaches the first lens 32 while spreading and enters the first lens 32 from the light incident surface 32a. The light exit surface 32b has a focal point in front of the second lens 34. Thereby, the first lens 32 can make the light L that is more condensed than when it enters the light incident surface 32a enter the second lens 34. The second lens 34 converts the light L into parallel light and emits it from the light exit surface 34b toward the rotary reflector 8. Among the light L emitted from the light exit surface 34b, the light L for which the conversion into parallel light is insufficient hits the wall portion 16 and is absorbed.

[0038] As described above, in the vehicle lamp 1 according to the present embodiment, a plurality of incident portions 4a, and thus a plurality of light emitting portions 2, are assigned to one light source 6. Then, the rotary reflector 8 sequentially switches the reflection direction of the light L to each incident portion 4a, and the control unit 10 controls the turning on and off of the light source 6 in synchronization with the rotation of the rotary reflector 8. As a result, the light L of the light source 6 is selectively distributed to a predetermined incident portion 4a, and the light emitting portion 2 corresponding to the incident portion 4a to which the light L is distributed emits light. Therefore, according to the vehicle lamp 1 of the present embodiment, the number of light emitting portions 2 can be increased while suppressing an increase in the number of light sources 6. Thereby, it becomes possible to display more diverse information while suppressing the complication of the structure and the increase in cost of the vehicle lamp 1.

[0039] Further, in the vehicle lamp 1, a plurality of light source units 12 are stacked, and the rotary reflector 8 extends in the stacking direction of the light source units 12 to reflect the light L of each light source 6. In this way, by sharing the rotary reflector 8 among the plurality of light source units 12, the number of light emitting portions 2 can be further increased, and the complication of the structure and the increase in the number of components of the vehicle lamp 1 can be suppressed. Further, the rotary reflector 8 of the present embodiment is constituted by a polygon mirror. Thereby, it becomes possible to easily expand the reflecting surface 8a as compared with the case where the rotary reflector 8 is constituted by a blade type mirror. Further, it is possible to suppress the excessive enlargement of the rotary reflector 8. Therefore, it is possible to easily associate one rotary reflector 8 with the plurality of light source units 12.

[0040] Further, the vehicle lamp 1 includes a collimator lens unit 14 that converts the light L of the light source 6 into parallel light and emits it to the rotary reflector 8. Thereby, the straightness or directivity of the light L traveling toward the rotary reflector 8 can be enhanced. Therefore, the distribution accuracy of the light L to each incident portion 4a by the rotary reflector 8 can be enhanced. As a result, a clearer light emission pattern can be formed.

[0041] Further, the collimator lens unit 14 condenses the light L of the light source 6 with the first lens 32 having a relatively large light incident surface 32a and makes it incident on the second lens 34, and the second lens 34 having a relatively small light incident surface 34a converts the light L into parallel light and emits it to the rotary reflector 8. In this way, by capturing the light L of the light source 6 with the relatively large first lens 32, the accuracy required for positioning the light source 6 and the first lens 32 can be relaxed. Also, by converting the light L into parallel light and emitting it with the relatively small second lens 34, more condensed parallel light can be generated. Therefore, the distribution accuracy of the light L by the rotary reflector 8 can be improved, and a clearer light emission pattern can be formed.

[0042] Also, the optical path 30 from the second lens 34 to the rotary reflector 8 is partitioned by the light-absorbing wall portion 16. Thereby, the light that travels obliquely with respect to the arrangement direction of the second lens 34 and the rotary reflector 8 can be absorbed by the wall portion 16. For this reason, only the light L that substantially travels parallel to the arrangement direction can be irradiated onto the rotary reflector 8. Therefore, the straightness of the light L traveling toward the rotary reflector 8 can be enhanced, and the distribution accuracy of the light L to each incident portion 4a by the rotary reflector 8 can be enhanced. As a result, a clearer light emission pattern can be formed.

[0043] Also, in the vehicle lamp 1, a fan 18 connected to the rotary reflector 8 and a heat sink 20 connected to be heat-exchangeable with the light source 6 are communicated with each other by a duct 22. In this way, by integrating the rotary reflector 8 and the fan 18, the light source 6 can be cooled using the rotation of the rotary reflector 8. Therefore, miniaturization and cost reduction of the vehicle lamp 1 can be achieved.

[0044] The embodiments of the present invention have been described in detail above. The above-described embodiments are merely specific examples for carrying out the present invention. The content of the embodiments does not limit the technical scope of the present invention, and many design changes such as changes, additions, deletions, etc. of components are possible without departing from the idea of the invention defined in the claims. The new embodiments with design changes have the combined effects of the combined embodiments and the deformations. In the above-described embodiments, regarding the content that allows such design changes, notations such as "in the present embodiment" and "in the present embodiment" are added for emphasis, but design changes are also allowed for the content without such notations. Any combination of the above components is also effective as an aspect of the present invention. The hatching attached to the cross-section of the drawing does not limit the material of the object to which the hatching is attached.

[0045] The invention according to the above-described embodiment may be specified by the items described below. [Item 1] A light source (6), A rotary reflector (8) having a reflecting surface (8a) that reflects the light (L) of the light source (6), A light guide unit (4) having a plurality of incident portions (4a) into which the light (L) reflected by the reflecting surface (8a) is incident, and a plurality of exit portions (4b) that exit the light (L) incident on each incident portion (4a), A plurality of light emitting portions (2) into which the light (L) emitted from each exit portion (4b) is incident and that emit the light (L) forward of the lamp, A control unit (10) that controls the lighting state of the light source (6), and The rotary reflector (8) switches the reflection direction of the light (L) to each incident portion (4a) in order by rotation, The control unit (10) controls the lighting state of the light source (6) so that the light (L) selectively enters a predetermined incident portion (4a), A vehicle lamp (1). [Item 2] The vehicle lamp (1) has a structure in which a plurality of light source units (12) including a light source (6) and a light guide unit (4) are stacked, The rotating reflector (8) extends in the stacking direction of the plurality of light source units (12) and reflects the light (L) of the light source (6) of each light source unit (12). The vehicle lamp (1) according to the first aspect. [Item 3] The rotating reflector (8) has a polygon mirror. The vehicle lamp (1) according to the second aspect. [Item 4] The vehicle lamp (1) further includes a collimator lens unit (14) disposed in the optical path (30) of the light (L) from the light source (6) toward the rotating reflector (8). The collimator lens unit (14) includes a first lens (32) and a second lens (34) having a light incident surface (34a) smaller than the light incident surface (32a) of the first lens (32), and the second lens (34) is disposed closer to the rotating reflector (8) than the first lens (32). The first lens (32) condenses the light (L) of the light source (6) and makes it incident on the second lens (34). The second lens (34) converts the light (L) into parallel light and emits it to the rotating reflector (8). The vehicle lamp (1) according to any one of the first to third aspects. [Item 5] The vehicle lamp (1) further includes an absorptive wall portion (16) that partitions at least a part of the region between the second lens (34) and the rotating reflector (8) in the optical path (30). The vehicle lamp (1) according to the fourth aspect. [Item 6] A fan (18) connected to the rotation axis (Ax) of the rotating reflector (8), A heat sink (20) heat-exchangeably connected to the light source (6), The vehicle lamp (1) further includes a duct (22) connecting the fan (18) and the heat sink (20). The vehicle lamp (1) according to any one of the first to fifth aspects. [Item 7] The plurality of light emitting portions (2) are arranged on the grill (G) of the vehicle (V). The vehicle lamp (1) according to any one of the first to sixth aspects.

Explanation of Reference Numerals

[0046] 1 Vehicle lamp, 2 Light emitting part, 4 Light guide part, 4a Incident part, 4b Exit part, 6 Light source, 8 Rotary reflector, 8a Reflecting surface, 10 Control part, 12 Light source unit, 14 Collimator lens part, 16 Wall part, 18 Fan, 20 Heat sink, 22 Duct, 30 Optical path, 32 First lens, 34 Second lens.

Claims

1. A light source, a rotary reflector having a reflecting surface for reflecting the light of the light source, a light guide unit having a plurality of incident portions into which the light reflected by the reflecting surface is incident, and a plurality of emission portions for emitting the light incident on each incident portion, a plurality of light emitting portions into which the light emitted from each emission portion is incident and which emit the light forward of the lamp, a control unit for controlling the lighting state of the light source, and the rotary reflector sequentially switches the reflection direction of the light to each incident portion by rotation, the control unit controls the lighting state of the light source so that the light selectively enters a predetermined one of the incident portions, A vehicle lamp.

2. The vehicle lamp has a structure in which a plurality of light source units including the light source and the light guide unit are stacked, the rotary reflector extends in the stacking direction of the plurality of light source units and reflects the light of the light source of each light source unit, The vehicle lamp according to claim 1.

3. The rotary reflector has a polygon mirror, The vehicle lamp according to claim 2.

4. further comprising a collimator lens unit disposed in an optical path of the light from the light source toward the rotary reflector, the collimator lens unit has a first lens and a second lens having a light incident surface smaller than a light incident surface of the first lens and disposed closer to the rotary reflector than the first lens, the first lens condenses the light of the light source and makes it incident on the second lens, the second lens converts the light into parallel light and emits it to the rotary reflector, The vehicle lamp according to any one of claims 1 to 3.

5. further comprising an absorptive wall portion that partitions at least a part of a region between the second lens and the rotary reflector in the optical path, The vehicle lamp according to claim 4.

6. a fan connected to a rotation axis of the rotary reflector, a heat sink heat-exchangeably connected to the light source, and a duct connecting the fan and the heat sink, The vehicle lamp according to any one of claims 1 to 3.

7. The plurality of light emitting portions are arranged on a grille of a vehicle, The vehicle lamp according to any one of claims 1 to 3.

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