JP2014032934A - Vehicle lamp fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for improving the performance of a vehicle lamp fitting using a laser light source.SOLUTION: A vehicle lamp fitting 1 according to one embodiment of this invention includes: a laser light source part 18; a light emitting member 16 which receives laser light L from the laser light source part 18 and emits light; and a vibration part 34 which uses vibrations of a vehicle to vibrate at least one of the laser light source part 18 and the light emitting member 16.

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp used in a vehicle such as an automobile.

  Patent Document 1 discloses a vehicle headlamp that includes a semiconductor laser that emits laser light and a light emitting unit that includes a phosphor and emits light upon receiving the laser light. In this vehicle headlamp, laser light (blue-violet) having a wavelength of 405 nm is emitted from a semiconductor laser. The light emitter is a silicone resin containing phosphors of blue, green and red, and generates white light upon receiving blue-violet laser light. White light generated by the illuminant is reflected forward of the lamp by the reflecting mirror.

JP 2011-129375 A

  As a result of earnest research on the vehicular lamp using a laser light source, the present inventors have recognized the following problems. That is, in a vehicular lamp using a conventional laser light source, there is a possibility that the temperature of the light emitting member rises due to long-time irradiation of the laser light and the light emitting member is melted. When the light emitting member is melted, highly coherent laser light may be directly irradiated outside the lamp. In addition, the luminous efficiency of the light-emitting member may be lowered even before the melting loss occurs. Therefore, the vehicular lamp using the conventional laser light source has room for improving the performance of the vehicular lamp such as safety and irradiation performance.

  This invention is made | formed in view of such a subject, The objective is to provide the technique which aims at the performance improvement of the vehicle lamp using a laser light source.

  In order to solve the above problems, an aspect of the present invention is a vehicular lamp. The vehicular lamp includes a laser light source section, a light emitting member that emits light upon receiving laser light from the laser light source section, and a vibration that vibrates at least one of the laser light source section and the light emitting member using vibration of the vehicle. And a section.

  According to this aspect, the position where the laser beam of the light emitting member is irradiated by the vibration of the vehicle can be shifted. Thereby, since the melting damage of a light emitting member and the fall of luminous efficiency can be suppressed, the performance of the vehicle lamp using a laser light source can be improved.

  In the above aspect, the vibration unit may vibrate the laser light source unit and the light emitting member at different periods or directions. In any one of the above aspects, a drive unit that moves the light emitting member so that the position of the light emitting member irradiated with the laser light is shifted separately from the vibration of at least one of the laser light source unit and the light emitting member. You may prepare. According to these aspects, the movement range of the irradiation position of the laser beam in the light emitting member can be further expanded, and the performance of the vehicular lamp can be further enhanced.

  Note that any combination of the above-described constituent elements, and those obtained by replacing the constituent elements and expressions of the present invention with each other among methods, apparatuses, systems, etc. are also effective as an aspect of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which aims at the performance improvement of the vehicle lamp using a laser light source can be provided.

FIG. 1A is a vertical cross-sectional view illustrating a schematic structure of the vehicular lamp according to the first embodiment. FIG. 1B is a vertical cross-sectional view showing a schematic structure in the vicinity of the light emitting member in the vehicular lamp according to the first embodiment. It is a schematic diagram which shows the structure of the light emission member in the vehicle lamp which concerns on Embodiment 2, a laser light source part, a vibration part, and a drive part. FIG. 3A is a schematic diagram illustrating a structure of a light emitting member, a laser light source unit, and a vibration unit in a vehicular lamp according to the first modification. FIG. 3B is a vertical cross-sectional view showing a schematic structure in the vicinity of the light emitting member in the vehicular lamp according to the second modification. FIG. 3C is a schematic diagram illustrating the structure of the light emitting member and the vibrating portion in the vehicular lamp according to the third modification.

  The present invention will be described below based on preferred embodiments with reference to the drawings. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate. The embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

(Embodiment 1)
FIG. 1A is a vertical cross-sectional view illustrating a schematic structure of the vehicular lamp according to the first embodiment. FIG. 1B is a vertical cross-sectional view showing a schematic structure in the vicinity of the light emitting member in the vehicular lamp according to the first embodiment. The vehicular lamp 1 according to the first embodiment is a vehicular headlamp device including a pair of headlamp units disposed on the left and right of the front side of the vehicle, for example. Since the pair of headlamp units have substantially the same configuration, FIG. 1 shows the configuration of one of the left and right headlamp units as the vehicular lamp 1. The vehicular lamp 1 includes a lamp body 2 having an opening on the front side of the vehicle, and a translucent cover 4 attached so as to cover the opening of the lamp body 2. The translucent cover 4 is made of translucent resin or glass. A lamp unit 10 is accommodated in the lamp chamber 3 formed by the lamp body 2 and the translucent cover 4.

  The lamp unit 10 is a so-called projector-type lamp unit, and includes a bracket unit 12, a light emitting member mounting unit 14, a light emitting member 16, a laser light source unit 18, a reflector 20, a shade unit 22, and a projection lens 24. The heat radiation fin 26 and the vibration part 34 are provided.

  The bracket portion 12 is a substantially plate-like member formed of a metal material such as aluminum, and is disposed so that the main surface faces the front-rear direction of the lamp. A light emitting member mounting portion 14 is fixed to the main surface of the bracket portion 12 on the front side of the lamp. In the present embodiment, the bracket portion 12 and the light emitting member mounting portion 14 are integrally formed. A radiation fin 26 is fixed to the main surface of the bracket portion 12 on the rear side of the lamp. The bracket portion 12 has a screw hole at a predetermined position on the edge, and an aiming screw 30 that penetrates the lamp body 2 and extends forward is screwed into the screw hole. Thereby, the bracket part 12 is attached to the lamp body 2. The vehicular lamp 1 can adjust the optical axis of the lamp unit 10 in the horizontal direction or the vertical direction by the aiming screw 30. The shape of the bracket part 12 is not particularly limited to this.

  The light emitting member mounting portion 14 is formed of a metal material such as aluminum, for example, and protrudes from the main surface of the bracket portion 12 on the front side of the lamp to the front side of the lamp. The light emitting member mounting portion 14 has a substantially plate shape, and is disposed such that the main surface faces the lamp vertical direction. The light emitting member mounting portion 14 is provided with a through hole 14a penetrating in the vertical direction.

  The light emitting member 16 is a member that emits light upon receiving the laser light L from the laser light source unit 18, and is made of, for example, a phosphor. The light emitting member 16 is fitted into a frame-shaped support member 32. The light emitting member 16 is coupled to the light emitting member mounting portion 14 through the vibrating portion 34 together with the support member 32. More specifically, the vibrating portion 34 is connected to the outer surface of the support member 32 in which the light emitting member 16 is fitted in the frame and the inner surface of the through hole 14a, and the light emitting member 16 is connected to the light emitting member mounting portion 14. The The heat of the light emitting member 16 is radiated through the support member 32, the vibrating portion 34, the light emitting member mounting portion 14, the bracket portion 12, and the radiation fins 26. The light emitting member 16 includes a lower exposed surface 16a exposed to the lamp chamber space on the lower main surface side of the light emitting member mounting portion 14, and an upper exposed surface 16b exposed to the lamp chamber space on the upper main surface side of the light emitting member mounting portion 14. And have. The lower exposed surface 16a constitutes an incident surface for the laser light L, and the upper exposed surface 16b constitutes an emission surface for low coherent light emitted from the light emitting member 16 excited by receiving the laser light L. Therefore, the upper exposed surface 16 b corresponds to the light emitting surface of the light emitting member 16.

  The laser light source unit 18 includes a housing 18a, a lens 18b, and a laser diode (not shown) that emits laser light L. The casing 18a accommodates a laser diode. An opening is provided at a predetermined location of the housing 18a, and a lens 18b is fitted into this opening. The lens 18b is, for example, a collimating lens that converts laser light emitted from the laser diode into parallel light, or a condensing lens that condenses the laser light emitted from the laser diode. Since the internal structure of the laser light source unit 18 is conventionally known, a detailed description thereof will be omitted. The laser light source unit 18 is inserted into an opening 12 a provided in the bracket unit 12 and is fixed to the bracket unit 12. The posture of the laser light source unit 18 is determined so that the laser light L is irradiated onto the lower exposed surface 16a of the light emitting member 16. The heat generated from the laser light source unit 18 is radiated through the bracket unit 12 and the radiation fins 26.

  The vehicular lamp 1 has a configuration in which the light emitting member 16 is excited by irradiation with the laser light L, and low coherent light generated thereby is irradiated forward of the lamp. Examples of the combination of the light emitting member 16 and the laser light source unit 18 include the following. That is, the laser light source unit 18 is a light source that irradiates ultraviolet laser light. The light emitting member 16 is a member including a blue light emitting phosphor that converts the wavelength of ultraviolet laser light into blue light and a yellow light emitting phosphor that converts the wavelength of ultraviolet laser light into yellow light. For example, the light emitting member 16 is a so-called fluorescent ceramic obtained by sintering a transparent ceramic substrate containing a blue light emitting phosphor and a yellow light emitting phosphor. The light emitting member 16 is not limited to ceramic, and may be formed of, for example, glass containing a fluorescent material, or a resin containing a fluorescent material and having a light transmitting property. In this combination, the ultraviolet laser light emitted from the laser light source unit 18 enters the light emitting member 16 from the lower exposed surface 16a, and is wavelength-converted into blue light and yellow light by the light emitting member 16. Blue light and yellow light emitted from the upper exposed surface 16 b of the light emitting member 16 are additively mixed to become white light W, which travels toward the reflector 20.

  The laser light source unit 18 may be a light source that emits blue laser light, and the light emitting member 16 may be a phosphor that converts the wavelength of the blue laser light into yellow light. In this case, a part of the blue laser light emitted from the laser light source unit 18 is converted into yellow light by the light emitting member 16 and emitted from the upper exposed surface 16b. The remaining blue laser light passes through the light emitting member 16 and is emitted from the upper exposed surface 16b. Then, the yellow light generated by the light emitting member 16 and the blue laser light that has passed through the light emitting member 16 are mixed to form white light W, which travels toward the reflector 20. The light emitting member 16 may be a phosphor that converts the wavelength of blue laser light into green light, yellow light, and red light.

  The reflector 20 is a substantially dome-shaped member, is disposed above the light emitting member 16, and is fixed to the light emitting member mounting portion 14. The reflector 20 has a reflection surface 20a formed of a part of a spheroid on the inside. The reflecting surface 20a has a first focal point and a second focal point located on the front side of the lamp relative to the first focal point. The reflector 20 has a positional relationship with the light emitting member 16 such that the light emitting member 16 substantially coincides with the first focal point of the reflecting surface 20a.

  A shade portion 22 is provided on the front side of the lamp of the light emitting member mounting portion 14. The shade portion 22 is fixed to the lamp front side end portion of the light emitting member mounting portion 14 by welding or the like. The shade portion 22 may be integrally formed with the bracket portion 12 and the light emitting member mounting portion 14. The shade part 22 has a flat part 22a and a curved part 22b. The flat portion 22a is disposed so as to be substantially flush with the upper main surface of the light emitting member mounting portion 14. The curved portion 22b is curved downward on the front side of the lamp portion with respect to the flat portion 22a so as not to block incidence of light emitted from the light emitting member 16 to the projection lens 24. The shade portion 22 and the reflector 20 are positioned relative to each other so that the ridge line 22c formed by the flat portion 22a and the curved portion 22b of the shade portion 22 is located in the vicinity of the second focal point of the reflecting surface 20a. Yes.

  The shade part 22 also functions as a lens holder, and the projection lens 24 is fixed to the tip of the bending part 22b. The projection lens 24 is composed of a plano-convex aspherical lens having a convex front surface and a flat rear surface, and a light source image formed on a rear focal plane including the rear focus of the projection lens 24 as a reverse image. Project onto the virtual vertical screen. The projection lens 24 is provided on the optical axis of the lamp unit 10 and at a position where the rear focal point substantially coincides with the second focal point of the reflecting surface 20a.

  The white light W emitted from the upper exposed surface 16b of the light emitting member 16 is reflected by the reflecting surface 20a of the reflector 20, and enters the projection lens 24 through the second focal point of the reflecting surface 20a, that is, near the ridge line 22c. The light incident on the projection lens 24 is irradiated from the projection lens 24 to the front of the lamp as substantially parallel light. Moreover, when a part of light is reflected on the flat surface portion 22a of the shade portion 22, the light of the light emitting member 16 is selectively cut with the ridge line 22c as a boundary line. Thereby, the light distribution pattern which has the cut-off line corresponding to the shape of the ridgeline 22c is projected ahead of a vehicle.

  The vibration unit 34 is a member that vibrates at least one of the laser light source unit 18 and the light emitting member 16 using the vibration of the vehicle. The vibration unit 34 vibrates the laser light source unit 18 and / or the light emitting member 16 so that the irradiation position of the laser light L on the light emitting member 16 is shifted. The vibration unit 34 may vibrate the laser light source unit 18 and / or the light emitting member 16 at the same cycle and / or direction as the vehicle vibration, or the laser light source unit 18 and / or the direction different from the vehicle vibration. The light emitting member 16 may be vibrated. In the present embodiment, the vibration unit 34 vibrates the light emitting member 16. The light emitting member 16 is supported in the through hole 14 a of the light emitting member mounting portion 14 by the vibrating portion 34. The vibration unit 34 transmits the vibration of the vehicle to the light emitting member 16 and vibrates the light emitting member 16 using the vibration of the vehicle as a vibration source. For example, the vibration unit 34 has elasticity, and supports the light emitting member 16 while allowing the light emitting member 16 to vibrate due to its own elastic deformation. In the present embodiment, the vibrating portion 34 is configured by a coil spring, and one end of the coil spring is connected to the outer surface of the support member 32, and the other end of the coil spring is connected to the inner surface of the through hole 14a. In addition, the vibration part 34 may be comprised with other spring members, such as a torsion spring. The vibration part 34 can amplify or attenuate the vibration of the vehicle and transmit it to the light emitting member 16.

  In the present embodiment, the vibrating portion 34 is connected to the outer surface of the support member 32 in the front-rear and left-right direction of the lamp. Thereby, the light emitting member 16 can vibrate in the front-rear and left-right directions of the lamp by the vibration of the vehicle. The movable range (amplitude) of the light emitting member 16 in the front / rear and left / right directions of the light emitting member 16 due to the vibration of the vehicle is set to a range in which the light emitting member 16 is not removed from the optical path of the laser light L. The support member 32 may vibrate in the lamp vertical direction. In this case, the movable range of the light emitting member 16 in the vertical direction of the lamp is set in the vicinity of the first focal point of the reflecting surface 20a so that a desired light distribution pattern can be formed. The movable range of the light emitting member 16 can be changed by adjusting the size and elasticity of the spring constituting the vibrating portion 34.

  Further, the light emitting member 16 may vibrate only in the lamp front-rear direction or in the lamp left-right direction, for example. In this case, the vibration of the light emitting member 16 in the lamp left-right direction or the lamp front-rear direction can be restricted by bringing the inner surface of the through hole 14a into contact with the outer surface of the support member 32 in the lamp left-right direction or the lamp front-back direction. . Further, by providing projections projecting from both main surfaces of the light emitting member mounting portion 14 toward the through hole 14a, the support member 32 is sandwiched between the projections in the vertical direction of the lamp, thereby vibrating the light emitting member 16 in the vertical direction of the lamp. Can be regulated.

  As described above, the vehicular lamp 1 according to the present embodiment includes the vibration unit 34 that vibrates the light emitting member 16 using the vibration of the vehicle. By allowing the light emitting member 16 to vibrate by the vibration unit 34, the irradiation point P on the lower exposed surface 16a can be shifted, that is, the position of the light emitting member 16 irradiated with the laser light L. Alternatively, the irradiation point P can be shifted by allowing relative displacement of the light emitting member 16 with respect to the laser light source unit 18 fixed to the vehicle side by the vibration unit 34. Thereby, the temperature rise of the light emitting member 16 can be suppressed, and the melting damage of the light emitting member 16 can be suppressed. As a result, it is possible to avoid a situation in which the laser light L is directly irradiated outside the lamp without passing through the light emitting member 16. Therefore, the safety of the vehicular lamp using the laser light source can be improved. Moreover, since the temperature rise of the light emitting member 16 can be suppressed, a decrease in the light emission efficiency of the light emitting member 16 can be suppressed. Therefore, the irradiation performance of the vehicular lamp using the laser light source can be enhanced.

  In addition, since melting of the light emitting member 16 is suppressed, it is possible to avoid a situation in which the laser light L is directly applied to the members such as the translucent cover 4 and the members are damaged. Therefore, the lifetime of the vehicular lamp using the laser light source can be extended. Further, even when the light emitting member 16 is damaged and a through portion (through hole or the like) from the lower exposed surface 16a to the upper exposed surface 16b is formed, the light emitting member 16 is vibrated to vibrate the through portion. It is possible to shorten the time during which the irradiation point P overlaps. Thereby, the leakage amount of the laser beam L from the penetration part can be reduced. Therefore, the safety of the vehicular lamp using the laser light source can be improved. In the present embodiment, the light emitting member 16 is vibrated using the vibration of the vehicle. Thereby, since installation of the vibration source of the light emitting member 16 can be omitted, an increase in the size of the vehicular lamp 1 and an increase in manufacturing cost can be suppressed.

(Embodiment 2)
The vehicular lamp according to the second embodiment has the same configuration as that of the vehicular lamp 1 according to the first embodiment except that the vibration unit vibrates the laser light source unit and includes a drive unit that displaces the light emitting member. The same components as those in the first embodiment are denoted by the same reference numerals, and the description and illustration thereof are omitted as appropriate.

  FIG. 2 is a schematic diagram illustrating a structure of a light emitting member, a laser light source unit, a vibrating unit, and a driving unit in the vehicular lamp according to the second embodiment. The laser light source unit 18 of the vehicular lamp 1 according to the present embodiment has a structure in which the lens 18b is disposed in the opening of the housing 18a and supported by the housing 18a by the vibration unit 34. The vibration part 34 is configured by a coil spring, and one end of the coil spring is connected to the end of the lens 18b, and the other end of the coil spring is connected to the side wall of the opening of the housing 18a. The vibration unit 34 vibrates the lens 18b using the vibration of the vehicle. The laser diode 18c may be supported by the casing 18a via the vibration unit 34, and the laser diode 18c may vibrate due to the vibration of the vehicle. Further, the housing 18a is supported by the bracket portion 12 via the vibration portion 34, and the housing 18a vibrates due to the vibration of the vehicle, so that the lens 18b and the laser diode 18c fixed to the housing 18a vibrate. Good. That is, the vibration unit 34 of the present embodiment vibrates the laser light source unit 18 using the vibration of the vehicle. The “vibrating the laser light source unit 18” includes vibrating the lens 18b and / or the laser diode 18c.

  Further, the vehicular lamp 1 of the present embodiment moves the light emitting member 16 so that the position of the light emitting member 16 irradiated with the laser light L is shifted separately from the vibration of at least one of the laser light source unit 18 and the light emitting member 16. A drive unit 36 is provided. The drive unit 36 includes a rod 36a and a motor 36b. The light emitting member 16 of the present embodiment has a disk shape, and a rod 36a is fixed at the center of the circle. The rod 36 a is substantially orthogonal to the main surface of the light emitting member 16. A motor 36b is connected to one end of the rod 36a, and the rod 36a can be rotated in the circumferential direction by the motor 36b. The drive unit 36 rotates the light emitting member 16 by driving the motor 36b and rotating the rod 36a. Thereby, the irradiation point P of the laser beam L on the light emitting member 16 can be shifted in the circumferential direction of the light emitting member 16.

  Therefore, in the vehicular lamp 1 according to the present embodiment, the irradiation point P can be shifted by the rotation of the light emitting member 16 in addition to shifting the irradiation point P in the light emitting member 16 by the vibration of the laser light source unit 18. Thereby, since the movement range of the irradiation point P can be expanded more, the temperature rise of the light emitting member 16 can be suppressed more. As a result, it is possible to further increase the safety of the vehicular lamp 1 by further suppressing the occurrence of melting of the light emitting member 16. Moreover, the fall of the luminous efficiency of the light emission member 16 can be suppressed more, and the irradiation performance of the vehicle lamp 1 can further be improved. Further, by vibrating the laser light source unit 18, the shape of the emission pattern of the white light W emitted from the light emitting member 16 (the shape of the light emission region on the upper exposed surface 16b) can be deformed. In the present embodiment, since the laser light source unit 18 vibrates in the radial direction of the light emitting member 16, the emission pattern of the white light W can be formed in a strip shape extending in the radial direction of the light emitting member 16. And the improvement of the light distribution performance of the vehicle lamp 1 can be aimed at by utilizing the shape of this emission pattern for formation of a light distribution pattern.

  The vibration unit 34 may vibrate the light emitting member 16. For example, the light emitting member 16 is connected to the rod 36 a via the vibration part 34. Alternatively, the drive unit 36 is coupled to the bracket unit 12 (see FIG. 1A) via the vibration unit 34. Thereby, the light emitting member 16 is rotated by the drive unit 36 while vibrating due to the vibration of the vehicle. That is, the drive unit 36 moves the light emitting member 16 while allowing the light emitting member 16 to vibrate due to the vibration of the vehicle.

  The present invention is not limited to the above-described embodiments, and the embodiments can be combined, and various modifications such as design changes can be added based on the knowledge of those skilled in the art. Embodiments added or modified are also included in the scope of the present invention. Each of the above-described embodiments and a new embodiment generated by the combination of each of the above-described embodiments and the following modification have the effects of the combined embodiment and modification.

(Modification 1)
FIG. 3A is a schematic diagram illustrating a structure of a light emitting member, a laser light source unit, and a vibration unit in a vehicular lamp according to the first modification. FIG. 3A shows a state in which the vehicular lamp 1 is observed from above the lamp. The vehicular lamp 1 according to Modification 1 is a combination of the structure of the first embodiment in which the light emitting member 16 is vibrated by the vibration unit 34 and the structure of the second embodiment in which the laser light source unit 18 is vibrated by the vibration unit 34. Is provided. In this case, the light emitting member 16 and the laser light source unit 18 vibrate due to the vibration of the vehicle. Thereby, since the movement range of the irradiation point P can be expanded more, the temperature rise of the light emitting member 16 can be suppressed more. As a result, the safety and irradiation performance of the vehicular lamp 1 can be further improved.

  When the laser light source unit 18 and the light emitting member 16 are vibrated, it is preferable that the vibrating unit 34 vibrate them in different periods or directions. Thereby, the irradiation point P can be shifted more reliably. For example, as shown in FIG. 3A, the vibrating portion 34 is connected to the outer surface of the support member 32 in the lamp front-rear direction (left-right direction in FIG. 3A), and the lamp-right direction of the support member 32 (FIG. 3). The inner side surface of the through hole 14a comes into contact with the outer side surface in the vertical direction in (A). Thereby, the light emitting member 16 vibrates in the front-back direction of the lamp due to the vibration of the vehicle. In addition, the left and right side surfaces of the housing 18a of the laser light source unit 18 and the inner surface of the opening 12a are connected via the vibration unit 34, and the inner surface of the opening 12a contacts the upper and lower surfaces of the housing 18a (FIG. 1 ( A)). Thereby, the laser light source unit 18 vibrates in the left-right direction of the lamp by the vibration of the vehicle. With the above configuration, the vibration directions of the light emitting member 16 and the laser light source unit 18 can be made different. Further, the laser light source unit 18 and the light emitting member 16 can be vibrated at different periods by changing the elasticity and size of the vibration unit 34.

(Modification 2)
FIG. 3B is a vertical cross-sectional view showing a schematic structure in the vicinity of the light emitting member in the vehicular lamp according to the second modification. In each embodiment mentioned above, although the vibration part 34 is comprised with the spring, the structure of the vibration part 34 is not specifically limited to this. For example, as shown in FIG. 3B, the vibration unit 34 may be made of an elastic material such as an elastomer such as rubber, a gel body, or a sponge body.

(Modification 3)
FIG. 3C is a schematic diagram illustrating the structure of the light emitting member and the vibrating portion in the vehicular lamp according to the third modification. In the vehicular lamp 1 according to the modified example 3, the vibration part 34 includes a rod 34a and a stopper part 34b. The light emitting member 16 is a substantially fan-shaped plate member, and a rod 34a is inserted in the vicinity of the center of the fan shape. The light emitting member 16 is rotatably connected to the rod 34a with the rod 34a as a rotation axis. The rod 34a extends substantially perpendicular to the main surface of the light emitting member 16, and its end is fixed to the bracket portion 12 (see FIG. 1A). The light emitting member 16 may be fixed to the rod 34 a so as not to be rotatable, and the end of the rod 34 a may be connected to the bracket portion 12 so as to be rotatable. In this case, the light emitting member 16 rotates together with the rod 34a. With the configuration described above, the light emitting member 16 can be vibrated around the rod 34a by the vibration of the vehicle. Alternatively, the light emitting member 16 and the laser light source unit 18 can be relatively displaced by the vibration of the vehicle. As a result, the irradiation point P can be shifted.

  The stopper portion 34b has a substantially U-shaped cross section (substantially U-shaped), a first wall portion 34b1 and a second wall portion 34b2 extending in parallel with each other at intervals, a first wall portion 34b1 and The first wall portion 34b1 extends in a direction perpendicular to the second wall portion 34b2, and the third wall portion 34b3 is connected to the ends of the second wall portion 34b2. In the stopper portion 34b, the end region of the light emitting member 16 opposite to the side connected to the rod 34a enters the space surrounded by the first wall portion 34b1, the second wall portion 34b2 and the third wall portion 34b3. To be arranged. The first wall portion 34 b 1 and the second wall portion 34 b 2 are arranged so as to intersect with the rotation direction of the light emitting member 16. Therefore, the rotation of the light emitting member 16 around the rod 34a is regulated by the first wall portion 34b1 and the second wall portion 34b2. That is, the light emitting member 16 can rotate between the first wall portion 34b1 and the second wall portion 34b2. The interval between the first wall portion 34b1 and the second wall portion 34b2 is set in a range in which the light emitting member 16 is not removed from the optical path of the laser light L.

(Other)
In each of the above-described embodiments, the lamp unit 10 is a projector-type lamp unit, but is not particularly limited thereto, and may be a reflective lamp unit. The vehicular lamp 1 is not limited to a vehicular headlamp, and may be a marker lamp such as a rear combination lamp. Moreover, although the white light W is irradiated from the light emitting member 16, you may irradiate light of other colors, such as red and amber color. In each of the embodiments described above, the vehicular lamp 1 has a so-called transmissive structure in which the laser light L is incident from the lower exposed surface 16a of the light emitting member 16 and the white light W is emitted from the upper exposed surface 16b. Although it has, it is not limited to this in particular. For example, the vehicular lamp 1 may have a so-called reflective structure in which the laser light L is incident from the upper exposed surface 16b and the white light W is emitted from the upper exposed surface 16b.

  DESCRIPTION OF SYMBOLS 1 Vehicle lamp, 16 Light-emitting member, 18 Laser light source part, 34 Vibration part, 36 Drive part, L Laser beam.

Claims (3)

A laser light source unit;
A light emitting member that emits light by receiving laser light from the laser light source unit;
A vibrating section that vibrates at least one of the laser light source section and the light emitting member using vibration of a vehicle;
A vehicular lamp characterized by comprising:   The vehicular lamp according to claim 1, wherein the vibration unit vibrates the laser light source unit and the light emitting member at different periods or directions.   The drive part which moves the said light emission member so that the position where the laser beam of the said light emission member is irradiated separately from the vibration of at least one of the said laser light source part and the said light emission member is further provided. Vehicle lamp.

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