JP2020009715A - Vehicular light - Google Patents

Abstract

To provide a vehicular light comprising a reflective spatial light modulator, in which it is effectively suppressed the reflective spatial light modulator is damaged by a vibration load or the like.SOLUTION: A pressing tool 60 is arranged at a front side of a lamp relatively to a spatial light modulator 32 for elastically pressing the spatial light modulator toward rear of the lamp while being in contact with a peripheral section 32b. A heat sink 50 is arranged at a rear side of the lamp for elastically pressing the spatial light modulator toward the front side of the lamp while being in contact with a center section thereof. Furthermore, a board bracket 40 is arranged at the rear side of the lamp rather than the spatial light modulator 32 for supporting a control board 36 while being in contact thereto. The pressing tool 60 is fastened on the board bracket 40 from the front side of the lamp and the heat sink 50 is fastened from the rear side of the lamp. Thereby, it is prevented that an excessive load acts on the spatial light modulator 32 and the positional relationship between the control board 36 and the board bracket 40 or the heat sink 50 is changed even if a vibration load or the like acts on a vehicular light 10.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicular lamp provided with a reflective spatial light modulator.

  2. Description of the Related Art Conventionally, as a configuration of a vehicular lamp, for example, as described in Patent Document 1, a vehicular lamp including a reflective spatial light modulator that reflects light from a light source toward the front of the lamp is known. ing.

  Further, conventionally, as a configuration of an illumination device including a reflection type spatial light modulator, the spatial light modulator is disposed on the rear side of the spatial light modulator in a state in which the spatial light modulator is in contact with a peripheral portion of the spatial light modulator. 2. Description of the Related Art An arrangement in which an electrically connected control board is arranged is known.

JP-A-2006-91976

  In the vehicular lamp described in Patent Document 1, it is possible to form various light distribution patterns with high precision by controlling the spatial distribution of reflected light with a spatial light modulator.

  By the way, as a configuration of the illumination device including the reflection type spatial light modulator, a bracket abutting from the front side to a peripheral portion thereof is disposed on the front side of the spatial light modulator, and is more than the spatial light modulator. If a configuration is adopted in which a heat sink that elastically presses the spatial light modulator forward while being in contact with the central portion thereof is provided on the rear side, no excessive load acts on the spatial light modulator. In this way, the electrical connection between the spatial light modulator and the control board can be maintained.

  However, if such a configuration is applied to a vehicular lamp as it is, the following problem may occur.

  That is, since a vibration load or an impact load acts on the vehicle lamp due to running of the vehicle or the like, the positional relationship between the spatial light modulator and the heat sink is easily shifted, and the positional relationship between the control board and the bracket or the heat sink is also shifted. It will be easier.

  If the positional relationship between the spatial light modulator and the heat sink deviates, an excessive load acts on the spatial light modulator, which may damage the spatial light modulator. Further, if the positional relationship between the control board and the bracket or the heat sink is shifted, an unreasonable load acts on the connection between the spatial light modulator and the control board, which may damage the connection. .

  The present invention has been made in view of such circumstances, and in a vehicle lamp including a reflection-type spatial light modulator, the spatial light modulator is damaged by a vibration load or the like, or the spatial light modulator is It is an object of the present invention to provide a vehicular lamp capable of effectively suppressing damage to a connection portion with a control board.

  The present invention achieves the above object by devising a support structure for a spatial light modulator.

That is, the vehicle lamp according to the present invention is:
In a vehicle lamp equipped with a reflective spatial light modulator that reflects light from a light source toward the front of the lamp,
A control board electrically connected to the spatial light modulator in a state in contact with a peripheral portion of the spatial light modulator is disposed on a rear side of the lamp with respect to the spatial light modulator,
A pressing tool that elastically presses the spatial light modulator toward the rear of the lamp while being in contact with the peripheral edge of the spatial light modulator is disposed closer to the front of the lamp than the spatial light modulator,
A heat sink that elastically presses the spatial light modulator toward the front of the lamp while being in contact with the central portion of the spatial light modulator is disposed on a rear side of the lamp with respect to the spatial light modulator,
A board bracket for supporting the control board in a state in contact with the control board is arranged on the rear side of the lamp from the control board,
The pressing tool is fixed to the board bracket from the front side of the lamp, and the heat sink is fixed from the rear side of the lamp.

  The specific configuration of the “spatial light modulator” is not particularly limited as long as it can control the spatial distribution of light reaching the projection lens. A device using a mirror, a device using a reflective liquid crystal, or the like can be used.

  The "control board" is electrically connected to the spatial light modulator in a state of being in contact with the peripheral edge of the spatial light modulator. It may be electrically connected to the spatial light modulator in a state, or may be electrically connected to the spatial light modulator in a state of being in contact with a peripheral portion of the spatial light modulator via another member. You may.

  The “pressing device” elastically presses the spatial light modulator toward the rear of the lamp in a state in which the spatial light modulator is in contact with the peripheral edge of the spatial light modulator. The basic configuration is not particularly limited.

  The "heat sink" is configured to elastically press the spatial light modulator toward the front of the lamp in a state in which the heat sink is in contact with the center of the spatial light modulator. The configuration is not particularly limited.

  The above-mentioned “bracket for board” is configured to support the control board in a state of being in contact with the control board, but the specific support structure is not particularly limited.

  Since the vehicular lamp according to the present invention includes a reflective spatial light modulator that reflects light from the light source toward the front of the lamp, the spatial light modulator controls the spatial distribution of the reflected light. By doing so, various light distribution patterns can be accurately formed.

  At that time, on the lamp front side relative to the spatial light modulator, a pressing tool that elastically presses the spatial light modulator toward the rear of the lamp while being in contact with the periphery thereof is disposed, A heat sink is disposed behind the spatial light modulator so as to elastically press the spatial light modulator toward the front of the lamp while being in contact with the center of the lamp. Even when a load or an impact load is applied, it is possible to prevent an excessive load from acting on the spatial light modulator. Thus, the spatial light modulator can be effectively prevented from being damaged.

  Further, on the rear side of the lamp with respect to the spatial light modulator, a control board which is electrically connected to the spatial light modulator in a state of being in contact with a peripheral portion thereof is arranged. On the rear side, a board bracket for supporting the control board in contact with the board bracket is arranged, and the pressing tool is fixed to the board bracket from the front side of the lamp and the heat sink is mounted on the lamp bracket. Since it is fixed from the rear side, even if a vibration load or impact load is applied to the vehicle lamp, the positional relationship between the control board and the board bracket or heat sink can be prevented from shifting. Thereby, it is possible to prevent an unreasonable load from acting on the connection between the spatial light modulator and the control board. Thus, it is possible to effectively prevent the connection portion between the spatial light modulator and the control board from being damaged.

  As described above, according to the present invention, in a vehicular lamp provided with a reflective spatial light modulator, the spatial light modulator is damaged by a vibration load or the connection portion between the spatial light modulator and the control board is damaged. Can be effectively suppressed.

  In the above configuration, if the elastic pressing force of the pressing tool on the spatial light modulator is set to a value larger than the elastic pressing force of the heat sink on the spatial light modulator, the peripheral edge of the spatial light modulator is The state of being constantly pressed by the control board can be maintained, and thereby, the electrical connection between the spatial light modulator and the control board can be maintained more reliably.

  At this time, when the pressing tool elastically presses the spatial light modulator at a plurality of locations, the “elastic pressing force of the pressing tool against the spatial light modulator” is the sum of the elastic pressing forces at each location. Means the applied elastic pressing force. Similarly, when the heat sink elastically presses the spatial light modulator at a plurality of locations, the above-mentioned "elastic pressing force of the heat sink against the spatial light modulator" refers to the total elastic pressing force at each location. It means the pressing force.

  In the above configuration, a plurality of first stepped bolts for fixing the pressing tool to the board bracket are arranged around the spatial light modulator. A state in which the large-diameter portion is in contact with the control board at the distal end surface of the large-diameter portion in a state where the large-diameter portion is inserted through the bolt insertion hole of the pressing tool, and the small-diameter portion is inserted through the bolt insertion hole formed in the control substrate. In this configuration, the small-diameter portion is screwed to the board bracket, and the large-diameter portion is provided with a first spring for elastically pressing the pressing tool toward the rear of the lamp. Further, it is easily possible to stably press the spatial light modulator by the pressing tool with a predetermined elastic pressing force.

  In addition, by adopting such a configuration, the pressing tool is fixed to the board bracket, and at the same time, the control board is supported by the board bracket, so that the configuration of the vehicle lamp is simplified. be able to. Instead of such a configuration, the control board is fixed to the board bracket independently of the fixing of the pressing tool to the board bracket, so that the control board is supported by the board bracket. It is also possible to use

  In the above configuration, a plurality of second stepped bolts for fixing the heat sink to the board bracket are arranged around the spatial light modulator. The large-diameter portion is configured to be in contact with the board bracket on the distal end surface in a state where the large-diameter portion is inserted through a bolt insertion hole formed in the heat sink, and to be screwed to the board bracket at the small-diameter portion. If the second spring for elastically pressing the heat sink toward the front of the lamp is attached to the portion, the spatial light modulator can be stably pressed by the heat sink with a predetermined elastic pressing force. Can be easily performed.

  In the above configuration, the left and right ends of the heat sink are further formed with projections protruding toward the front of the lamp, and the left and right ends of the board bracket are engaged with the upper and lower ends of the projections. With the configuration in which the guide groove extending in the front-rear direction is formed, it is possible to prevent the heat sink from rotating in the vertical direction with respect to the board bracket. Thus, it is possible to easily cause the central portion of the spatial light modulator to be pressed by the heat sink with a uniform pressure distribution.

  At this time, each of the protrusions is formed with a long hole extending in the front-rear direction of the lamp and a screw hole is formed in each groove, and then a screw is tightened into each screw hole through each long hole. Accordingly, if the heat sink is fixed to the board bracket in a state where the heat sink is positioned in the lamp front-rear direction with respect to the board bracket, the spatial light modulator is pressed from both sides in the lamp front-rear direction with a predetermined elastic pressing force. The positional relationship between the members can be fixed while maintaining the state of the operation. Accordingly, even when a vibration load or an impact load is applied to the vehicle lamp, the load greater than the elastic pressing force of the pressing tool or the elastic pressing force of the heat sink is controlled by the spatial light modulator and the spatial light modulator. It can be prevented from acting on the connection portion with the substrate.

Front view showing a vehicle lamp according to an embodiment of the present invention. View from arrow II in FIG. III-III sectional view of FIG. 1 IV-IV sectional view of FIG. 1 FIG. 1 is a sectional view taken along line VV in FIG. 1. Front view showing the spatial light modulator sub-assembly of the vehicle lamp taken out and shown. Detailed view of section VII in Fig. 2 Detailed view of section VIII in FIG. Detailed view of section IX in FIG. FIG. 2 is a perspective view of the spatial light modulator sub-assembly disassembled into its components and shown together with a support bracket. FIG. 2 is an exploded perspective view showing the lens-side sub-assembly of the vehicle lamp together with a support bracket. FIG. 9 is a view similar to FIG. 5 and showing a modification of the above embodiment.

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

  FIG. 1 is a front view showing a vehicular lamp 10 according to one embodiment of the present invention, and FIG. 2 is a view taken in the direction of arrow II in FIG. FIG. 3 is a sectional view taken along line III-III of FIG. 1, FIG. 4 is a sectional view taken along line IV-IV of FIG. 1, and FIG. 5 is a sectional view taken along line VV of FIG. FIG. 1 shows a state in which some of the components are broken.

  In these figures, the direction indicated by X is “forward” as a lamp (“forward” as a vehicle), and the direction indicated by Y is “leftward” (leftward as a vehicle) orthogonal to “forward”. However, when viewed from the front of the lamp, the direction is “rightward”), and the direction indicated by Z is “upward”. The same applies to other drawings.

  As shown in these drawings, a vehicle lamp 10 according to the present embodiment is a headlamp provided at a front end portion of a vehicle, and is incorporated in a lamp room formed by a not-shown lamp body and a translucent cover. It is configured as a projector-type lamp unit.

  The vehicular lamp 10 includes a light source side sub-assembly 20, a spatial light modulator sub-assembly 30, a lens side sub-assembly 70, and a support bracket 80 for supporting these. The vehicle lamp 10 is supported by the lamp body via a mounting structure (not shown) at the support bracket 80.

  As shown in FIG. 3, the light source side sub-assembly 20 includes a light source 22, a reflector 24 that reflects light emitted from the light source 22 toward the spatial light modulator sub-assembly 30, and a base member 26 that supports them. Is provided.

  The spatial light modulator sub-assembly 30 includes a spatial light modulator 32, a control board 36 disposed on the rear side of the lamp with respect to the spatial light modulator 32, and a board disposed on the rear side of the lamp with respect to the control board 36. And a heat sink 50 disposed on the rear side of the lamp with respect to the board bracket 40, and a pressing member 60 disposed on the lamp front side with respect to the spatial light modulator 32.

  The lens-side sub-assembly 70 includes a projection lens 72 having an optical axis Ax extending in the vehicle front-rear direction, and a lens holder 74 that supports the projection lens 72.

  The vehicular lamp 10 according to the present embodiment emits various light distributions by irradiating the light from the light source 22 reflected by the reflector 24 toward the front of the lamp via the spatial light modulator 32 and the projection lens 72. A pattern (for example, a light distribution pattern for a low beam, a light distribution pattern for a high beam, a light distribution pattern that changes according to a vehicle traveling condition, and a light distribution pattern that draws characters and symbols on a road surface in front of the vehicle) is formed with high precision. It is configured to obtain.

  In order to realize this, in the assembling process of the vehicular lamp 10, the positional relationship between the spatial light modulator 32 and the projection lens 72 is finely adjusted while the light source 22 is turned on to form a light distribution pattern. It is designed to improve the positional relationship accuracy.

  Next, a specific configuration of each of the light source side sub-assembly 20, the spatial light modulator sub-assembly 30, the lens side sub-assembly 70, and the support bracket 80 will be described.

  First, the configuration of the light source side sub-assembly 20 will be described.

  The light source 22 is a white light emitting diode, and is fixedly supported by the base member 26 with its light emitting surface facing obliquely upward and forward. The base member 26 is fixedly supported by a support bracket 80.

  The reflector 24 is disposed so as to cover the light source 22 from the front side of the lamp, and is fixedly supported by a base member 26 at a peripheral portion thereof. The reflector 26 reflects the light emitted from the light source 22 obliquely upward and rearward. At this time, the reflecting surface 24a of the reflector 24 is formed so as to converge the light emitted from the light source 22 to the vicinity of the rear focal plane including the rear focal point F of the projection lens 72.

  Next, the configuration of the spatial light modulator sub-assembly 30 will be described.

  FIG. 6 is a front view showing the spatial light modulator sub-assembly 30 taken out. 7 is a detailed view of a portion VII in FIG. 2, FIG. 8 is a detailed view of a portion VIII in FIG. 3, and FIG. 9 is a detailed view of a portion IX in FIG. FIG. 10 is a perspective view showing the spatial light modulator sub-assembly 30 disassembled into its components and shown together with the support bracket 80.

  As shown in these figures, the spatial light modulator 32 is a reflection-type spatial light modulator, and is a digital micromirror device in which a plurality of (eg, hundreds of thousands) micromirrors are arranged in a matrix. (DMD).

  The spatial light modulator 32 can selectively switch the direction of reflection of light from the light source 22 that has reached the spatial light modulator 32 by controlling the angle of each reflecting surface of the plurality of micromirrors. Has become. Specifically, a mode in which the light from the light source 22 is reflected toward the projection lens 72 and a mode in which the light is reflected in the other direction (ie, a direction that does not adversely affect the formation of the light distribution pattern) are selected. It has become.

  The spatial light modulator 32 is disposed along a vertical plane orthogonal to the optical axis Ax at the position of the rear focal point F of the projection lens 72, and its reflected light control area 32a is horizontally long about the optical axis Ax. It has a rectangular outer shape.

  The spatial light modulator 32 is supported by a control board 36 via a socket 34 on a rear surface of a peripheral portion 32b surrounding the reflected light control region 32a.

  The socket 34 is configured as a horizontally long rectangular frame member along the peripheral portion 32b of the spatial light modulator 32, and is in a state of being electrically connected to a conductive pattern (not shown) formed on the control board 36. And is fixed to the control board 36. The control board 36 has an opening 36 a having substantially the same shape as the inner peripheral edge of the socket 34.

  As shown in FIGS. 5 and 8, a plurality of terminal pins 32 c protruding from the rear surface toward the rear of the lamp are formed on the peripheral edge 32 b of the spatial light modulator 32. On the other hand, the socket 34 is formed with a plurality of terminal pins 34a projecting rearward from the rear surface thereof at positions corresponding to the plurality of terminal pins 32c.

  Each terminal pin 34a of the socket 34 has a proximal end (that is, a distal end portion embedded in the socket 34) formed in a substantially cylindrical shape, and each terminal pin 32c of the spatial light modulator 32 has a proximal end. The spatial light modulator 32 and the socket 34 are electrically connected to each other by fitting the leading end of the light emitting device.

  Each terminal pin 34a of the socket 34 is soldered to the conductive pattern of the control board 36 at the tip. For this reason, the socket 34 is arranged with its rear surface slightly floating from the front surface of the control board 36.

  The spatial light modulator 32 is supported by the pressing tool 60 and the heat sink 50 from both sides in the lamp front-rear direction.

  The pressing tool 60 is a member made of metal (for example, made of aluminum die-cast), and has a main body 60A extending in a flat plate shape along a vertical plane perpendicular to the optical axis Ax, and 1 on both left and right sides of the main body 60A. It has a configuration including a pair of flange portions 60B.

  In the main body 60A, a horizontally long rectangular opening 60Aa is formed around the optical axis Ax. The opening 60Aa has a horizontally long rectangular opening shape smaller than the outer peripheral shape of the spatial light modulator 32 but larger than the reflected light control region 32a.

  The pair of left and right flange portions 60B extend rearward from the side edge of the main body portion 60A near the left and right sides of the spatial light modulator 32, and then bend at a right angle in a direction away from the optical axis Ax to extend in a flat plate shape. It is formed as follows. Each flange portion 60B is formed with a bolt insertion hole 60Ba penetrating through the flange portion 60B in the front-rear direction of the lamp.

  The pressing tool 60 has a pair of left and right first steps at a pair of left and right flange portions 60B in a state where the main body portion 60A is in contact with the peripheral portion 32b of the spatial light modulator 32 from the front side of the lamp. It is fixed to the board bracket 40 by bolts 62. This fixing is performed while the spatial light modulator 32 is elastically pressed toward the rear of the lamp by the pressing tool 60.

  The specific configuration for performing this pressing is as follows.

  In other words, each of the first stepped bolts 62 has its large-diameter portion 62b inserted into the bolt insertion hole 60Ba of the pressing tool 60, and its distal end surface abuts on the control board 36. The small-diameter portion 62a is screwed into a screw hole 40a formed in the board bracket 40 with the bolt insertion hole 36b formed therein being inserted.

  At this time, a first spring 64 for elastically pressing the pressing tool 60 rearward of the lamp is attached to the large diameter portion 62b of each first stepped bolt 62. Each first spring 64 is constituted by a compression coil spring disposed between the head 62c of each first stepped bolt 62 and each flange portion 60B of the pressing tool 60.

  Note that the pressing tool 60 is arranged so that each flange 60B is separated from the control board 36 toward the front of the lamp when the main body 60A is in contact with the peripheral edge 32b of the spatial light modulator 32. The amount of rearward displacement of each flange 60B from the main body 60A is set.

  The heat sink 50 is a member made of metal (for example, made of aluminum die-cast), and is disposed so as to extend along a vertical plane orthogonal to the optical axis Ax. Is formed.

  At the center of the front surface of the heat sink 50, a prism-shaped protrusion 50c protruding toward the front of the lamp is formed. The protrusion 50 c has a horizontally long rectangular cross section centered on the optical axis Ax, and its size is set to a value smaller than the inner peripheral surface shape of the socket 34.

  The heat sink 50 has two pairs of left and right with the front end face of the protrusion 50c abutting against the central part of the spatial light modulator 32 (that is, the part where the reflected light control area 32a is located) from the rear side of the lamp. It is fixed to the board bracket 40 by the second stepped bolt 52. This fixing is performed in a state where the spatial light modulator 32 is elastically pressed toward the front of the lamp by the projection 50c.

  The specific configuration for performing this pressing is as follows.

  In other words, two pairs of left and right second stepped bolts 52 are arranged so as to be located at two upper and lower positions on both left and right sides of the spatial light modulator 32.

  Each of the second stepped bolts 52 has a large-diameter portion 52b inserted into a bolt insertion hole 50a formed in the heat sink 50, and a distal end surface of the second stepped bolt 52 abuts on the board bracket 40. It is screwed into a screw hole of a boss portion 40b formed in 40.

  At this time, a second spring 54 for elastically pressing the projection 50c of the heat sink 50 toward the front of the lamp is attached to the large diameter portion 52b of each second stepped bolt 52. Each second spring 54 is configured by a compression coil spring disposed between the head 52c of each second stepped bolt 52 and the heat sink 50.

  It should be noted that two pairs of left and right boss insertion holes 36c for preventing interference with the boss 40b are formed in the control board 36 with a diameter larger than that of the boss 40b.

  As described above, in the spatial light modulator sub-assembly 30 of the present embodiment, the spatial light modulator 32 is elastically pressed together with the socket 34 from both sides in the lamp front-rear direction by the pressing tool 60 and the heat sink 50. In a state where an excessive load is not applied to the spatial light modulator 32, the state in which the spatial light modulator 32 and the socket 34 are electrically connected to each other is surely maintained.

  In the present embodiment, the elastic pressing force of the pressing tool 60 on the spatial light modulator 32 is set to a value larger than the elastic pressing force of the heat sink 50 on the spatial light modulator 32, whereby the spatial light modulator 32 The state in which the peripheral portion 32b is constantly pressed by the control board 36 via the socket 34 is maintained.

  Specifically, the compression coil springs forming the first springs 64 have a larger wire diameter (for example, twice or more wire diameters) than the compression coil springs forming the second springs 54. The elastic pressing force obtained by summing the elastic pressing forces of the two first springs 64 is set to a value larger than the elastic pressing force obtained by summing the elastic pressing forces of the four second springs 54.

  At both left and right ends of the heat sink 50, projecting pieces 50d projecting toward the front of the lamp are formed, respectively. On the other hand, guide groove portions 40d extending in the front-rear direction of the lamp are formed at both left and right end portions of the board bracket 40 so as to engage with the upper and lower end surfaces of each of the pair of left and right projection pieces 50d.

  In this manner, the protrusion 50d and the guide groove 40d are engaged with each other on the left and right sides of the board bracket 40, so that the heat sink 50 does not rotate vertically with respect to the board bracket 40.

  An elongated hole 50e extending in the front-rear direction of the lamp is formed in each protruding piece 50d, and a screw hole 40e that opens to the side is formed in each guide groove 40d.

  Then, the screws 42 are tightened into the screw holes 40e through the long holes 50e, so that the heat sink 50 is fixed to the board bracket 40 in a state where the heat sink 50 is positioned in the lamp front-rear direction with respect to the board bracket 40. It has become.

  The portion where the guide groove 40d is formed in the board bracket 40 is formed thicker than other portions in order to secure the strength around the screw hole 40e. Further, a pair of upper and lower horizontal flange portions 40d1 forming the guide groove portion 40d in the board bracket 40 are formed so as to extend toward the optical axis Ax on both front and rear sides of the board bracket 40. Thereby, the rigidity of the guide groove 40d is sufficiently ensured.

  Next, the configuration of the support bracket 80 will be described.

  The support bracket 80 is a metal (for example, aluminum die-cast) member, and includes a vertical surface portion 80A extending along a vertical surface perpendicular to the optical axis Ax, and a horizontal surface extending from the lower edge of the vertical surface portion 80A toward the front of the lamp. And a horizontal surface portion 80B extending along. Reinforcing flange portions 80C for reinforcing the connecting portion between the vertical surface portion 80A and the horizontal surface portion 80B are formed on both left and right sides of the support bracket 80.

  In the vertical surface portion 80A, a horizontally long rectangular opening 80Aa is formed around the optical axis Ax. The opening 80Aa has a horizontally-long rectangular opening shape smaller than the outer peripheral shape of the spatial light modulator 32 but larger than the reflected light control area 32a, and the front edge of the inner peripheral surface has the entire circumference. Beveled over.

  Two pairs of right and left boss portions 80Ab extending rearward of the lamp are formed on the left and right sides of the control board 36 on the rear surface of the vertical surface portion 80A. The two pairs of left and right boss portions 80Ab are arranged at substantially the same height as the two pairs of left and right second stepped bolts 52.

  On the other hand, screw holes 40c are formed in the board bracket 40 at positions corresponding to the two left and right boss portions 80Ab.

  Then, the screw 44 is tightened from the rear side of the lamp into the screw hole of each boss 80Ab of the vertical surface portion 80A through each screw insertion hole 40c of the board bracket 40, so that the spatial light modulator sub-assembly 30 is attached to the support bracket 80. Is to be fixed.

  At this time, the length of each boss portion 80Ab is set such that the vertical surface portion 80A of the support bracket 80 is located on the lamp front side with respect to the main body portion 60A of the pressing tool 60.

  Further, a pair of left and right openings 80Ac for preventing interference with a pair of left and right first stepped bolts 62 is formed in the vertical plane portion 80A of the support bracket 80 from the head 62c of the first stepped bolt 62. Is also formed with a large diameter.

  The horizontal surface portion 80B is formed so as to extend to the front side of the lamp with respect to the reflector 24. The horizontal surface portion 80B is formed with a horizontally long rectangular opening 80Ba through which the reflector 24 is inserted.

  As shown in FIG. 6, on the front surface of the peripheral portion 32b of the spatial light modulator 32, two cylindrical positioning holes 32b1 are formed diagonally with respect to the optical axis Ax. Further, pin insertion holes 60Ab and 60Ac that penetrate the main body 60A in the front-rear direction of the lamp are formed in the main body 60A of the pressing tool 60 at positions corresponding to the positioning holes 32b1 of the spatial light modulator 32. Further, a cylindrical positioning pin 80Ad extending rearward of the lamp is formed at a position corresponding to the positioning hole 32b1 of the spatial light modulator 32 on the vertical surface portion 80A of the support bracket 80.

  Then, by inserting each positioning pin 80Ad of the support bracket 80 into each positioning hole 32b1 of the spatial light modulator 32 through each pin insertion hole 60Ab, 60Ac of the pressing tool 60, the spatial light modulator sub-assembly 30 is moved. When assembling to the support bracket 80, the positioning is performed in a vertical plane orthogonal to the optical axis Ax, and after the assembling, it is necessary to prevent the spatial light modulator 32 from being inadvertently displaced in the vertical plane. To prevent it.

  The two pin insertion holes 60Ab, 60Ac formed in the main body 60A of the pressing tool 60 are formed such that one pin insertion hole 60Ab is formed as a circular hole and the other pin insertion hole 60Ac extends in the diagonal direction. It is formed as a long hole.

  Next, the configuration of the lens side sub-assembly 70 will be described.

  As shown in FIG. 3, the projection lens 72 includes first and second lenses 72A and 72B arranged at a required interval in the front-rear direction of the lamp on the optical axis Ax.

  The first lens 72A located on the front side of the lamp is configured as a biconvex lens, and the second lens 72B located on the rear side of the lamp is configured as a concave meniscus lens bulging toward the rear of the lamp. At this time, the first and second lenses 72A and 72B are configured such that the upper ends are slightly cut off along the horizontal plane, and the lower parts are cut off relatively large along the horizontal plane.

  The first and second lenses 72A, 72B are supported by a common lens holder 74 at their outer peripheral edges.

  The lens holder 74 is a metal (for example, aluminum die-cast) member, and has a holder main body 74A formed so as to surround the projection lens 72 in a cylindrical shape, and a horizontal plane at the lower end of the outer peripheral surface of the holder main body 74A. And a pair of flange portions 74B formed so as to protrude to the left and right sides along the line.

  A projection 74Aa for positioning the first and second lenses 72A and 72B is formed on the inner peripheral surface of the holder main body 74A. On the other hand, the pair of left and right flange portions 74B are formed in a flat plate shape so as to extend in the front-rear direction of the lamp over the entire length of the lens holder 74 with a constant left-right width.

  FIG. 11 is an exploded perspective view showing the lens side sub-assembly 70 together with the support bracket 80.

  As shown in the figure, the lens holder 74 is fixed to a horizontal surface portion 80B of the support bracket 80 by mechanical fastening at a pair of left and right flange portions 74B. The fixing by the mechanical fastening is performed by screwing.

  To achieve this, a pair of front and rear screw insertion holes 74Ba is formed in each flange 74B of the lens holder 74 so as to penetrate the flange 74B in the vertical direction. A pair of front and rear bosses 80Bb having screw holes is formed on the horizontal surface portion 80B of the support bracket 80 so as to protrude downward. Then, a screw 76 is screwed into a screw hole of each boss 80Bb from above each flange 74B via each screw insertion hole 74Ba.

  At this time, each screw insertion hole 74Ba is formed as a long hole extending in the front-rear direction of the lamp with a lateral width larger than the screw diameter of each screw 76, thereby positioning the lens holder 74 with respect to the support bracket 80 in the front-rear direction of the lamp. The screw can be tightened in a state where is adjusted.

  On the lower surface of each flange portion 74B of the lens holder 74, a positioning pin 74Bb projecting vertically downward is formed at a central position in the front-rear direction of the pair of front and rear screw insertion holes 74Ba. Each positioning pin 74Bb is formed in a columnar shape, and its tip is formed in a convex curved shape. Further, the downward projection amount of each positioning pin 74Bb from the flange portion 74B is set to a value slightly larger than the plate thickness of the horizontal surface portion 80B of the support bracket 80.

  On the other hand, a long hole 80Bc is formed in the horizontal surface portion 80B of the support bracket 80 at a position corresponding to each positioning pin 74Bb so as to vertically pass through the horizontal surface portion 80B. Each long hole 80Bc is formed as a long hole extending in the front-rear direction of the lamp with a left-right width slightly larger than the diameter of the positioning pin 74Bb.

  When screwing the lens holder 74 to the support bracket 80, the positioning pin 74Bb is inserted into the elongated hole 80Bc in advance, so that the lens holder 74 is displaced in the left-right direction with respect to the support bracket 80. After the restriction, the positional relationship between the lens holder 74 and the support bracket 80 in the front-rear direction of the lamp can be finely adjusted. This prevents the lens holder 74 from being inadvertently rotated with respect to the support bracket 80 due to the torque generated when the screw is tightened, and improves the positional relationship accuracy between the spatial light modulator 32 and the projection lens 72. Has become.

  Next, the operation of the present embodiment will be described.

  Since the vehicle lamp 10 according to the present embodiment is configured to irradiate light from the light source 22 toward the front of the lamp through the spatial light modulator 32 and the projection lens 72, the spatial light modulator 32 projects the light. By controlling the spatial distribution of light reaching the lens 72, various light distribution patterns can be formed with high accuracy.

  At that time, a pressing tool 60 that elastically presses the spatial light modulator 32 toward the rear of the lamp in a state in which the spatial light modulator 32 is in contact with the peripheral edge portion 32b is disposed on the front side of the lamp with respect to the spatial light modulator 32. In addition, the spatial light modulator 32 is directed forward of the lamp in a state where the spatial light modulator 32 is in contact with the central portion (ie, the portion where the reflected light control area 32a is located) behind the spatial light modulator 32 in the lamp. Since the heat sink 50 that elastically presses is provided, even if a vibration load or an impact load is applied to the vehicular lamp 10, an excessive load is not applied to the spatial light modulator 32. can do. Thus, it is possible to effectively prevent the spatial light modulator 32 from being damaged.

  In addition, a control board 36 electrically connected to the spatial light modulator 32 in a state in which the spatial light modulator 32 is in contact with the peripheral edge 32b of the lamp via the socket 34 is disposed behind the spatial light modulator 32. However, on the rear side of the lamp with respect to the control board 36, a board bracket for supporting the control board 36 in a state of being in contact therewith is arranged. Since the lamp 60 is fixed from the front side of the lamp and the heat sink 50 is fixed from the rear side of the lamp, even when a vibration load or an impact load is applied to the vehicle lamp 10, the control board 36 and the board bracket 40 are fixed. The positional relationship between the spatial light modulator 32 and the control board 36 (that is, the spatial light modulator 32 and the Excessive load connection portion) of the connecting part and socket 34 of the bets 34 and the control board 36 can be controlled so as not to act. Thus, it is possible to effectively prevent the connection portion between the spatial light modulator 32 and the control board 36 from being damaged.

  As described above, according to the present embodiment, in the vehicular lamp 10 including the reflective spatial light modulator 32, the spatial light modulator 32 is damaged by a vibration load or the like, or the spatial light modulator 32 and the control board 36 Can be effectively suppressed from being damaged.

  Moreover, in the present embodiment, the elastic pressing force of the pressing tool 60 on the spatial light modulator 32 is set to a value larger than the elastic pressing force of the heat sink 50 on the spatial light modulator 32. Can be maintained in a state in which the peripheral portion 32b is constantly pressed against the control board 36, so that the electrical connection between the spatial light modulator 32 and the control board 36 can be maintained more reliably. Can be.

  At this time, in the present embodiment, a pair of left and right first stepped bolts 62 for fixing the pressing tool 60 to the board bracket 40 is arranged around the spatial light modulator 32, Each of the first stepped bolts 62 comes into contact with the control board 36 at its distal end surface with its large diameter portion 62b inserted through the bolt insertion hole 60Ba of the pressing tool 60, and its small diameter portion 62a contacts the control board 36. The small diameter portion 62a is screwed into the screw hole 40a formed in the board bracket 40 in a state where the formed bolt insertion hole 36b is inserted, and a pressing tool 60 is attached to the large diameter portion 62b. Since the first spring 64 for elastically pressing backward is attached, the pressing of the spatial light modulator 32 by the pressing tool 60 is performed stably with a predetermined elastic pressing force. It is easily possible.

  Moreover, by adopting such a configuration, the pressing tool 60 can be fixed to the board bracket 40, and at the same time, the control board 36 can be supported by the board bracket 40. The configuration of the lamp 10 can be simplified.

  Further, in the present embodiment, two pairs of left and right second stepped bolts for fixing the heat sink 50 to the board bracket 40 are arranged around the spatial light modulator 32, and on each of the second stepped bolts, The stepped bolt 52 abuts the board bracket 40 at its distal end surface with its large diameter portion 52b inserted through a bolt insertion hole 50a formed in the heat sink 50, and is screwed to the board bracket 40 at the small diameter portion 52a. The second spring 54 for elastically pressing the heat sink 50 toward the front of the lamp is attached to the large diameter portion 52b of the spatial light modulator 32. Pressing can be easily performed stably with a predetermined elastic pressing force.

  Further, in the present embodiment, at the left and right ends of the heat sink 50, projections 50d protruding toward the front of the lamp are formed, respectively, and the left and right ends of the board bracket 40 are engaged with the upper and lower ends of the projection 50d. Since the guide groove 40d extending in the front-rear direction of the lamp is formed as described above, it is possible to prevent the heat sink 50 from rotating vertically with respect to the board bracket 40. Thus, it is possible to easily press the center of the spatial light modulator 32 with a uniform pressure distribution by the heat sink 50.

  In addition, a long hole 50e extending in the front-rear direction of the lamp is formed in each projection piece 50d, and a screw hole 40e is formed in each groove 40d. A screw 42 is formed in each screw hole 40e through each long hole 50e. Since the heat sink 50 is fixed to the board bracket 40 in a state where the heat sink 50 is positioned relative to the board bracket 40 in the lamp front-rear direction by being tightened, the spatial light modulator 32 is disposed from both sides in the lamp front-rear direction. The positional relationship between the members can be fixed while maintaining the state of being pressed by the predetermined elastic pressing force. Thus, even when a vibration load or an impact load acts on the vehicle lamp 10, the load greater than the elastic pressing force of the pressing member 60 or the elastic pressing force of the heat sink 50 is applied to the spatial light modulator 32 and the spatial light modulator. It can be prevented from acting on the connection between the modulator 32 and the control board 36.

  When a screw 42 is tightened into each screw hole 40e through each long hole 50e, a tightening torque is generated. However, each protrusion 50d of the heat sink 50 and the guide groove 40d of the board bracket 40 are engaged. Therefore, the heat sink 50 does not rotate with respect to the board bracket 40 due to the tightening torque.

  In the above embodiment, the control board 36 is described as being electrically connected to the spatial light modulator 32 in a state where the control board 36 is in contact with the peripheral portion 32b of the spatial light modulator 32 via the socket 34. The control board 36 may be configured to be electrically connected to the spatial light modulator 32 in a state where the control board 36 is directly in contact with the peripheral portion 32b of the spatial light modulator 32.

  In the above embodiment, the light emitted from the light source 22 reflected by the reflector 26 is reflected by the spatial light modulator 32. However, the light emitted from the light source 22 whose deflection is controlled by a lens or the like is reflected by the spatial light modulator. It is also possible to adopt a configuration in which the light is reflected by the spatial light modulator 32 or a configuration in which the light emitted from the light source 22 is directly reflected by the spatial light modulator 32.

  Next, a modified example of the above embodiment will be described.

  FIG. 12 is a view similar to FIG. 5, showing a main part of a vehicular lamp according to this modification.

  As shown in the figure, the basic configuration of this modification is the same as that of the above embodiment, but the configuration of the spatial light modulator sub-assembly 130 is partially different from that of the above embodiment.

  That is, the spatial light modulator sub-assembly 130 of this modification is different from the above-described embodiment in that the control board 136 and the pressing tool 160 are individually fixed to the board bracket 140.

  Specifically, the width of the control board 136 of the present modified example is smaller than that of the control board 36 of the above embodiment. The control board 136 is formed with a pair of screw insertion holes 136d on both the left and right sides of an opening 136a through which the protrusion 50c of the heat sink 50 is inserted.

  Further, a screw hole 140f is formed in the board bracket 140 of this modification at a position corresponding to the pair of screw insertion holes 136d on the left and right. Then, the screws 146 are tightened from the front side of the lamp into the screw holes 140f of the board bracket 140 via the screw insertion holes 136d of the control board 136 so that the control board 136 is fixed to the board bracket 140. Has become.

  A notch 136e for preventing interference with the boss 140b of the board bracket 140 is formed at a side end of the control board 136.

  The pressing tool 160 of this modification has the same configuration of the main body 160A as the pressing tool 60 of the above embodiment, but partially differs in the configuration of a pair of left and right flange portions 160B. That is, each of the flange portions 160B is formed so as to extend rearwardly from the main body portion 160A to the side while being smaller than in the above-described embodiment, and to extend laterally from the main body portion 160A. It is formed at a position farther from the optical axis Ax than the side end surface of the substrate 136.

  The pressing tool 160 has a pair of left and right first and second flanges 160B in a state where the main body 160A is in contact with the peripheral edge 32b of the spatial light modulator 32 from the lamp front side. It is fixed to the board bracket 140 by one-step bolts 162.

  The large diameter portion 162b of each first stepped bolt 162 is formed to be longer than the large diameter portion 62b of each first stepped bolt 62 of the above embodiment by the thickness of the control board 136. The small-diameter portion 162a is formed shorter than the small-diameter portion 62a of each first stepped bolt 62 of the above-described embodiment, but other configurations are the same as those of the above-described embodiment.

  Each of the first stepped bolts 162 has its large-diameter portion 162b inserted into the bolt insertion hole 160Ba of the pressing member 160, and its distal end surface contacts the board bracket 140, and the small-diameter portion 162a is It is screwed into a screw hole 140a formed in the bracket 140.

  Also in the present modification, the first spring 64 is attached to the large diameter portion 162b of each first stepped bolt 162, so that the pressing tool 160 elastically moves the spatial light modulator 32 toward the rear of the lamp. It is designed to be pressed.

  Note that the support bracket 180 of this modification has the same configuration as the support bracket 80 of the above-described embodiment, except that a pair of left and right openings 180Ac formed in the vertical surface portion 180A is a pair of left and right openings 180Ac. It is formed at a position further away from the optical axis Ax corresponding to the position of the first stepped bolt 162.

  Even when the configuration of the present modification is adopted, in the vehicular lamp provided with the reflection type spatial light modulator 32, the spatial light modulator 32 may be damaged by vibration load or the like, or the spatial light modulator 32 and the control board 136 may be used. It is possible to effectively prevent the connection portion with the device from being damaged.

  When the configuration of the present modification is adopted, the control board 136 and the pressing tool 160 can be sequentially assembled to the board bracket 140.

  It should be noted that the numerical values shown as specifications in the above-described embodiment and its modifications are merely examples, and it is a matter of course that these may be set to different values as appropriate.

  Further, the present invention is not limited to the configurations described in the above-described embodiment and its modifications, and configurations in which various other changes are added can be adopted.

DESCRIPTION OF SYMBOLS 10 Vehicle lamp 20 Light source side sub-assembly 22 Light source 24 Reflector 24a Reflection surface 26 Base member 30, 130 Spatial light modulator sub-assembly 32 Spatial light modulator 32a Reflection light control area 32b Peripheral edge 32b1 Positioning hole 32c, 34a Terminal pin 34 Socket 36, 136 Control board 36a, 136a Opening 36b Bolt insertion hole 36c Boss insertion hole 40, 140 Board bracket 40a, 140a, 140f Screw hole 40b, 140b Boss 40c, 136d Screw insertion hole 40d Guide groove 40d1 Horizontal flange Part 40e Screw hole 42, 44, 146 Screw 50 Heat sink 50a Bolt insertion hole 50b Radiation fin 50c Projection part 50d Projection piece 50e Long hole 52 Second stepped bolt 52a, 62a, 162a Small diameter part 52b, 6 b, 162b Large diameter portion 52c, 62c Head 54 Second spring 60, 160 Pressing tool 60A, 160A Main body 60Aa Opening 60Ab, 60Ac Pin insertion hole 60B, 160B Flange 60Ba, 160Ba Bolt insertion hole 62, 162 First Stepped bolt 64 First spring 70 Lens side sub-assembly 72 Projection lens 72A First lens 72B Second lens 74 Lens holder 74A Holder body 74Aa Projection 74B Flange 74Ba Screw insertion hole 74Bb Positioning pin 76 Screw 80, 180 Support bracket 80A , 180A Vertical plane part 80Aa, 80Ac, 80Ba, 180Ac Opening part 80Ab Boss part 80Ad Positioning pin 80B Horizontal plane part 80Bb Boss part 80Bc Long hole 80C Reinforcement flange part 136e Notch part Ax Optical axis Rear focal point

Claims (6)

In a vehicle lamp equipped with a reflective spatial light modulator that reflects light from a light source toward the front of the lamp,
A control board electrically connected to the spatial light modulator in a state in contact with a peripheral portion of the spatial light modulator is disposed on a rear side of the lamp with respect to the spatial light modulator,
A pressing tool that elastically presses the spatial light modulator toward the rear of the lamp while being in contact with the peripheral edge of the spatial light modulator is disposed closer to the front of the lamp than the spatial light modulator,
A heat sink that elastically presses the spatial light modulator toward the front of the lamp while being in contact with the central portion of the spatial light modulator is disposed on a rear side of the lamp with respect to the spatial light modulator,
A board bracket for supporting the control board in a state in contact with the control board is arranged on the rear side of the lamp from the control board,
The vehicular lamp, wherein the pressing tool is fixed to the board bracket from the front side of the lamp and the heat sink is fixed from the rear side of the lamp.   The vehicular lamp according to claim 1, wherein an elastic pressing force of the pressing tool on the spatial light modulator is set to a value larger than an elastic pressing force of the heat sink on the spatial light modulator. . A plurality of first stepped bolts for fixing the pressing tool to the board bracket are arranged around the spatial light modulator,
Each of the first stepped bolts comes into contact with the control board at the distal end surface of the large diameter part in a state where the large diameter part of the first stepped bolt is inserted through the bolt insertion hole of the pressing tool. The small-diameter portion of the one-step bolt is screwed to the board bracket at the small-diameter portion with the small-diameter portion inserted through a bolt insertion hole formed in the control board,
3. The large diameter portion of each of the first stepped bolts is provided with a first spring for elastically pressing the pressing tool rearward of the lamp. Vehicle lighting fixtures. A plurality of second stepped bolts for fixing the heat sink to the substrate bracket are arranged around the spatial light modulator,
Each of the second stepped bolts comes into contact with the board bracket at the distal end surface of the large diameter part in a state where the large diameter part of the second stepped bolt is inserted through the bolt insertion hole formed in the heat sink. The second stepped bolt is screwed to the board bracket at a small diameter portion,
4. A large diameter portion of each of the second stepped bolts is provided with a second spring for elastically pressing the heat sink toward the front of the lamp. Vehicle lighting fixtures. At both left and right ends of the heat sink, projecting pieces protruding toward the front of the lamp are formed, respectively.
5. A guide groove extending in the front-rear direction of the lamp so as to be engaged with both upper and lower end surfaces of the projecting piece at both right and left end portions of the board bracket. Vehicle lighting fixtures. A long hole extending in the front-rear direction of the lamp is formed in each of the projection pieces, and a screw hole is formed in each of the guide grooves.
The screws are tightened into the screw holes via the elongated holes, so that the heat sink is fixed to the board bracket in a state where the heat sink is positioned in the lamp front-rear direction with respect to the board bracket. The vehicular lamp according to claim 5, characterized in that:

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