Luminaire

Abstract

To provide a luminaire capable of suppressing occurrence of dislocation of a projection region, and deformation or displacement of a projected pattern and the like, by suppressing dislocation of the positional relation between a lens and a plate on which a predetermined pattern or the like is formed.SOLUTION: A luminaire 1 includes a housing 3, an illumination member 5, a lens unit 9, and a lens cover 11. The lens unit 9 includes a collimator lens 51, a magnifying lens 53, and a stamp plate 55 arranged between the collimator lens 51 and the magnifying lens 53. The collimator lens 51 includes a front end wall part 89 protruding toward the magnifying lens 53 side from a front end part of a lens body 57. The magnifying lens 53 includes an elastic deformation part 79 capable of elastically deforming by protruding toward the collimator lens 51 side from a rear end part of a lens body 61. A gap G in the frontward / backward direction of an inner wall of a lens storage part 95 of the lens cover 11 is shorter than a length L from a front end portion to a rear end portion of the lens unit 9.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a lighting device. [Background technology]

[0002] BACKGROUND ART Conventionally, an image projection system (vehicle interior lighting device) for use in a vehicle interior, which includes a projector (lighting device) that projects an image onto a projection target, has been known (see Patent Document 1).

[0003] In conventional vehicle interior lighting devices, the projector (lighting device) includes a light source that emits light, a pattern plate having a pattern for projection, a first lens component that collects the light emitted from the light source and sends it to the pattern plate, and a second lens component that projects the pattern on the pattern plate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2023-159592 Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional lighting devices, the projected image or pattern is magnified at a relatively large ratio by the lens inside the lighting device, so if the positional relationship between the lens and the plate on which the specified image or pattern is formed is misaligned, the projection area may shift, or the projected image or pattern may be deformed or shifted.

[0006] The present invention has been made in view of the problems inherent in the prior art, and an object of the present invention is to provide an illumination device that can suppress misalignment of the projection area and deformation or misalignment of the projected image by suppressing misalignment of the positional relationship between the lens and the plate on which a predetermined image or the like is formed. [Means for solving the problem]

[0007] An illumination device according to an embodiment of the present invention comprises a housing, an illumination member accommodated in the housing and having a light-emitting unit, a lens unit assembled to the housing and transmitting light emitted from the light-emitting unit, and a lens cover attached to the housing and covering the lens unit, wherein the lens unit has a first lens arranged on the optical axis of the light emitted from the light-emitting unit, a second lens arranged on the optical axis opposite the first lens, and a plate arranged between the first lens and the second lens and on which an image to be projected is formed, wherein the first lens has a first lens body and a front end wall portion protruding from a front end of the first lens body toward the second lens, and the second lens has a second lens body and an elastic deformation portion protruding from a rear end of the second lens body toward the first lens and elastically deformable, and the lens cover has a lens accommodating portion that accommodates the lens unit, and the front-to-rear distance between the inner walls of the lens accommodating portion is smaller than the length from the front end to the rear end of the lens unit. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide an illumination device that can suppress misalignment of the projection area and deformation or misalignment of the projected image, etc., by suppressing misalignment of the positional relationship between the lens and the plate on which a specified image, etc. is formed. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view illustrating an example of an illumination device according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the lighting device according to the embodiment. [Figure 3] FIG. 1 is a plan view of an illumination device according to an embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. 2 is a side view of the lighting device according to the embodiment. [Figure 6] FIG. 6 is a cross-sectional view taken along line BB in FIG. 5. [Figure 7] FIG. 2 is a perspective view of a lens unit that constitutes the lighting device. [Figure 8] FIG. 2 is a perspective view of a magnifying lens included in the lens unit. [Figure 9] 4 is a cross-sectional view corresponding to the line AA in FIG. 3 before the lens cover is attached. [Figure 10] 6 is a cross-sectional view corresponding to the line BB in FIG. 5 before the lens cover is attached. DETAILED DESCRIPTION OF THE INVENTION

[0010] The lighting device according to the present embodiment will be described in detail below with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for the sake of explanation and may differ from the actual ratios.

[0011] As shown in FIGS. 1 to 6, the lighting device 1 according to this embodiment is applied, for example, to a vehicle interior lighting device that illuminates the interior of a vehicle. The lighting device 1 is disposed, for example, in a mounting portion formed by penetrating a wall portion of the vehicle interior. A vehicle-side connector (not shown) electrically connected to an end portion of an electric wire electrically connected to a power source is disposed near the wall portion of the vehicle interior. Power is supplied to the lighting device 1 by fitting with the vehicle-side connector. The lighting device 1 turns on or off the power supply in response to, for example, the operation of a switch portion provided on the vehicle side or the operation of an installed component such as a door. Furthermore, the lighting device 1 may be configured to change the color of light from a light-emitting element such as an LED and to change the lighting pattern, such as flashing or constant lighting, depending on the situation.

[0012] 1 to 6 corresponds to the front-to-rear direction (length direction) of the lighting device 1. Furthermore, the Y direction shown in FIGS. 1 to 6 corresponds to the left-to-right direction (width direction) of the lighting device 1 and is perpendicular to the X direction. Furthermore, the Z direction shown in FIGS. 1 to 6 corresponds to the height direction (up-down direction) of the lighting device 1 and is perpendicular to the X and Y directions.

[0013] As shown in FIGS. 1 to 7, the lighting device 1 includes a housing 3, a lighting member 5, a bus bar 7, a lens unit 9, and a lens cover 11.

[0014] As shown in FIGS. 1 to 6, the housing 3 includes a housing main body 13 and a housing cover 15. The housing main body 13 and the housing cover 15 are made of a plastic.

[0015] The housing body 13 is made of an insulating material such as a synthetic resin that does not transmit light. The housing body 13 is formed in a housing shape that can be inserted into a mounting portion on a wall of the vehicle interior. The housing body 13 has an opening on one side in the longitudinal direction and a fitting portion 17 into which a vehicle-side connector (not shown) can be fitted. The housing body 13 has a plurality of (four in this embodiment) busbar mounting portions 19 that communicate with the other side of the fitting portion 17 in the longitudinal direction and in which the busbars 7 are arranged. The housing body 13 has an illumination mounting portion 21 that communicates with one side of the busbar mounting portion 19 in the height direction and in which the illumination member 5 is arranged. A plurality of (two in this embodiment) locking protrusions 23 protrude outward from the outer surface of the housing body 13 as a member continuous with the housing body 13. In addition, a protruding portion 25 extending along the height direction of the housing body 13 is provided on the outer surface of the housing body 13 at a middle portion in the longitudinal direction. Furthermore, a recess 27 is provided on the outer surface of the longitudinal middle portion of the housing body 13, located on one side of the protrusion 25 in the longitudinal direction (the mating portion 17 side), and extending along the height direction of the housing body 13.

[0016] The housing cover 15 is made of an insulating material such as a synthetic resin that does not transmit light. The housing cover 15 is formed in a housing shape that covers the outer surface of the housing main body 13 on the side of the bus bar arrangement portion 19 and the lighting arrangement portion 21. The housing cover 15 is provided on the housing main body 13 side with a plurality of locking holes 29 (two in this embodiment) that can engage with the locking protrusions 23 of the housing main body 13. The engagement between the locking protrusions 23 of the housing main body 13 and the locking holes 29 of the housing cover 15 maintains the assembled state of the housing main body 13 and the housing cover 15. In addition, the inner surface of the housing cover 15 is provided with recesses (not shown) along the height direction of the housing cover 15 that can engage with the protrusions 25 of the housing main body 13. The engagement between the protrusions 25 of the housing main body 13 and the recesses of the housing cover 15 maintains the assembled state of the housing main body 13 and the housing cover 15. Furthermore, on the outer surface of the housing cover 15, a plurality of (two in this embodiment) locking projections 31 are formed as a single member continuous with the housing cover 15 and protrude outward.

[0017] A lens arrangement section 33 in which the lens unit 9 is arranged is provided on the opposite side of the housing cover 15 from the housing main body 13. The lens arrangement section 33 is provided with a cylindrical hood section 35, and the hood section 35 is provided with a circular opening 37 for passing light from the lighting member 5 arranged in the lighting arrangement section 21 of the housing main body 13.

[0018] As shown in FIGS. 2 and 4 , the illumination member 5 includes a circuit board 39 on which a circuit pattern is formed. One surface of the circuit board 39 is provided with a light-emitting unit 41, such as an LED, for illuminating the interior of the vehicle, and multiple (five in this embodiment) electronic components 43 for illuminating the light-emitting unit 41. Also provided on one surface of the circuit board 39 are multiple (four in this embodiment) contact points 45 electrically connected to the circuit pattern. The illumination member 5 is disposed in the illumination arrangement portion 21 so that the light-emitting unit 41 faces outward from the housing main body 13. At this time, the outer edge of the illumination member 5 is press-fitted into a groove formed in a wall portion constituting the illumination arrangement portion 21, thereby holding the illumination member 5 relative to the housing main body 13. When the housing cover 15 is attached to the housing main body 13, the light-emitting unit 41 of the illumination member 5 disposed in the illumination arrangement portion 21 faces the opening 37 of the housing cover 15.

[0019] As shown in FIG. 2 , the busbar 7 is made of a conductive material. The busbar 7 is formed in a plate shape and has a length that spans the busbar arrangement section 19 and the fitting section 17 of the housing main body 13. A plurality of busbars 7 (four in this embodiment) are used. A tab-shaped connection section 47 is provided on one longitudinal side of the busbar 7, and an elastically deformable resilient contact section 49 is provided on the other longitudinal side. The busbar 7 is inserted through an opening in the busbar arrangement section 19 of the housing main body 13 and arranged in the busbar arrangement section 19. At this time, the outer surface of the busbar 7 is inserted so as to be sandwiched and press-fitted between the inner wall surfaces of the busbar arrangement section 19, thereby holding the busbar 7 relative to the housing main body 13. The busbar 7 arranged in the busbar arrangement section 19 is arranged so that the connection section 47 is arranged inside the fitting section 17 and the resilient contact section 49 is exposed to the lighting arrangement section 21. When the busbar 7 is placed in the busbar arrangement section 19 and the lighting member 5 is placed in the lighting arrangement section 21, the elastic contact portion 49 comes into contact with the contact portion 45, and the busbar 7 is electrically connected to the lighting member 5. When the vehicle-side connector (not shown) is fitted into the fitting portion 17 of the busbar 7 electrically connected to the lighting member 5, the connection portion 47 is electrically connected to the vehicle-side connector, thereby enabling the supply of power to the lighting member 5.

[0020] As shown in FIGS. 2, 4, and 6 to 8, the lens unit 9 includes, for example, a collimator lens 51, a magnifying lens 53, and an engraved plate 55.

[0021] Collimating lens 51 is disposed on the optical axis of the light emitted from light-emitting unit 41, and adjusts the light from light-emitting unit 41 to form parallel light. Collimating lens 51 has a rectangular plate-shaped lens body 57 and a plurality of (two in this embodiment) locking frame portions 59 that are a member continuous with lens body 57 and protrude toward magnifying lens 53.

[0022] The magnifying lens 53 is disposed on the optical axis of the light-emitting unit 41 opposite the collimating lens 51, and radially expands the light emitted from the light-emitting unit 41. The magnifying lens 53 has a rectangular plate-shaped lens body 61 and multiple (two in this embodiment) wall portions 63 that are continuous with the lens body 61 and protrude toward the collimating lens 51. On the outer surfaces of the wall portions 63 of the magnifying lens 53, locking protrusions 65 are each continuous with the wall portions 63 and protrude outward. The engagement between the locking frame portions 59 of the collimating lens 51 and the locking protrusions 65 of the magnifying lens 53 maintains the assembled state of the collimating lens 51 and the magnifying lens 53.

[0023] The engraved plate 55 is disposed between the collimator lens 51 and the magnifying lens 53. The engraved plate 55 has a plate body 67 on which a predetermined pattern is formed as a projection image. The plate body 67 has an engraved portion 69 on which the predetermined pattern is engraved. The engraved portion 69 includes a light-transmitting portion that transmits light and a light-non-transmitting portion that does not transmit light. When light passes through the light-transmitting portion of the engraved portion 69, light in the shape of the transmitted pattern is emitted from the magnifying lens 53 of the lens unit 9. By sandwiching the engraved plate 55 between the collimator lens 51 and the magnifying lens 53 and engaging the locking frame portion 59 with the locking protrusion 65, the engraved plate 55 is held between the collimator lens 51 and the magnifying lens 53, and assembly of the lens unit 9 is completed.

[0024] As shown in FIGS. 1 to 6 , the lens cover 11 is made of an insulating material such as a synthetic resin that does not transmit light. The lens cover 11 is formed in a housing shape that covers the outer surface of the housing cover 15 on the lens placement section 33 side. The lens cover 11 has a plurality of locking holes 71 (two in this embodiment) on the housing 3 side that can engage with the locking protrusions 31 of the housing cover 15. The engagement between the locking holes 71 of the lens cover 11 and the locking protrusions 31 of the housing cover 15 maintains the assembled state of the lens cover 11 and the housing cover 15 of the housing 3. In addition, the lens cover 11 has a protrusion 73 that is a member continuous with the lens cover 11 and protrudes toward the housing main body 13. The engagement between the protrusion 73 of the lens cover 11 and the recess 27 of the housing main body 13 maintains the assembled state of the lens cover 11 and the housing main body 13 of the housing 3. Furthermore, a cylindrical hood portion 75 is provided on the opposite side of the lens cover 11 from the housing 3, and the hood portion 75 has a circular opening 77 for passing light from the lighting member 5 arranged in the lighting arrangement portion 21 of the housing main body 13.

[0025] As shown in FIGS. 2 and 7 to 10, the rear end of the lens body 61 of the magnifying lens 53 is formed with an elastically deformable portion 79, which is a member continuous with the lens body 61 and protrudes toward the collimating lens 51. The elastically deformable portion 79 extends from the lens body 61 in the vertical direction (Z direction), and a protrusion 79a is formed at the tip of the elastically deformable portion 79. Furthermore, rear pillar portions 81, which are members continuous with the lens body 61 and protrude toward the collimating lens 51, are formed on both left and right sides of the rear end of the lens body 61. The rear pillar portions 81 extend from the lens body 61 in the vertical direction (Z direction). Furthermore, front pillar portions 83, which are members continuous with the lens body 61 and protrude toward the collimating lens 51, are formed on both left and right sides of the front end of the lens body 61. The front pillar portions 83 extend from the lens body 61 in the vertical direction (Z direction). At the intersection (corner) between the front surface and the outer surface of the front pillar 83, a front inclined surface 83a is formed, which has an inclined surface that is inclined with respect to the front-to-back direction (X direction). At the intersection (corner) between the rear surface and the inner surface of the front pillar 83, a rear inclined surface 83b is formed, which has an inclined surface that is inclined with respect to the front-to-back direction (X direction). The front inclined surface 83a and the rear inclined surface 83b of the magnifying lens 53 are formed as inclined surfaces that gradually approach the center in the width direction (Y direction) as they move forward along the front-to-back direction (X direction). The front inclined surface 83a and the rear inclined surface 83b of the magnifying lens 53 may each be a chamfered surface (a so-called C-face) that has been chamfered into a flat shape.

[0026] As shown in Figures 2, 4, 6, and 7, a rear pedestal 85 is formed at the rear end of the lens body 57 of the collimating lens 51 as a member continuous with the lens body 57 and protruding toward the side opposite the magnifying lens 53. The rear pedestal 85 extends in the vertical direction (Z direction) from the lens body 57. A front pedestal 87 is formed at the front end of the lens body 57 as a member continuous with the lens body 57 and protruding toward the side opposite the magnifying lens 53. The front pedestal 87 extends in the vertical direction (Z direction) from the lens body 57. A front end wall 89 is formed at the front end of the lens body 57 as a member continuous with the lens body 57 and protruding toward the magnifying lens 53. The front end wall 89 extends in the vertical direction (Z direction) from the lens body 57. Furthermore, on both the left and right sides of the front end of the lens body 57, front-end pillar portions 91 are formed as single members continuous with the lens body 57, protruding toward the magnifying lens 53. The front-end pillar portions 91 extend in the up-down direction (Z direction) from the lens body 57. A front inclined surface portion 91a having an inclined surface inclined with respect to the front-rear direction (X direction) is formed at the intersection (corner) of the front surface and outer surface of the front-end pillar portion 91. A rear inclined surface portion 91b having an inclined surface inclined with respect to the front-rear direction (X direction) is formed at the intersection (corner) of the rear surface and inner surface of the front-end pillar portion 91. The front inclined surface portion 91a and the rear inclined surface portion 91b of the collimating lens 51 are formed as inclined surfaces that gradually approach the center in the width direction (Y direction) as they move forward along the front-rear direction (X direction). The front inclined surface portion 91a and the rear inclined surface portion 91b of the collimator lens 51 may each be a chamfered portion (a so-called C-surface) that is chamfered into a flat surface.

[0027] 2, 4, 6, and 7, plate-side inclined surface portions 93 having inclined surfaces inclined with respect to the front-rear direction (X direction) are formed on both left and right sides of the front end portion of the plate body 67 of the engraved plate 55. The plate-side inclined surface portions 93 are formed as inclined surfaces that gradually approach the center in the width direction (Y direction) as they move forward along the front-rear direction (X direction). The plate-side inclined surface portions 93 may be chamfered into a flat shape (a so-called C-surface).

[0028] As shown in FIGS. 2 to 6, the lens cover 11 has a lens housing portion 95 that covers the lens unit 9. The lens housing portion 95 is configured to have a front wall portion 95a, a rear wall portion 95b, and a pair of left and right side wall portions 95c. A cover-side inclined surface portion 99 having an inclined surface inclined with respect to the front-rear direction (X direction) is formed at the intersection of the inner surface of the front wall portion 95a and the rear wall portion 95b of the lens cover 11. The cover-side inclined surface portion 99 is formed as an inclined surface that gradually approaches the center in the width direction (Y direction) as it extends forward along the front-rear direction (X direction). In addition, the distance G (see FIG. 4) between the front wall portion 95a and the rear wall portion 95b of the lens cover 11 in the front-rear direction (X direction) is set to be smaller (shorter) than the length L (see FIG. 9) of the lens unit 9 in the front-rear direction (X direction). In this embodiment, for example, the front end wall 89 of the collimator lens 51 forms the front end portion of the lens unit 9, and the protrusion 79a of the elastic deformation portion 79 of the magnifying lens 53 forms the rear end portion of the lens unit 9. Therefore, the length L of the lens unit 9 in the front-to-rear direction (X direction) is the length from the front end wall 89, which is the front end portion of the lens unit 9, to the protrusion 79a of the elastic deformation portion 79, which is the rear end portion of the lens unit 9 (see FIG. 4).

[0029] As an example of assembling such a lighting device 1, first, the bus bar 7 and the lighting members 5 are assembled to the housing main body 13 of the housing 3. Next, the housing cover 15 is assembled to the housing main body 13. Then, the lens unit 9 is assembled to the housing cover 15 of the housing 3, and further, the lens cover 11 is assembled to the housing 3, thereby completing the assembly of the lighting device 1. Note that the housing cover 15 to which the lens unit 9 and lens cover 11 have been assembled in advance may be assembled to the housing main body 13.

[0030] The magnifying lens 53 is formed with an elastic deformation portion 79. The collimating lens 51, the engraved plate 55, the magnifying lens 53, and the lens cover 11 are each formed with an inclined surface portion (front inclined surface portion 91a, rear inclined surface portion 91b, plate-side inclined surface portion 93, front inclined surface portion 83a, rear inclined surface portion 83b, and cover-side inclined surface portion 99). When the lens unit 9 is attached to the lens cover 11, the protrusion portion 79a of the elastic deformation portion 79 provided on the magnifying lens 53 comes into contact with the inner wall (rear wall portion 95b) of the lens cover 11 (see FIGS. 4 and 6).

[0031] At this time, the elastic deformation portion 79 provided on the magnifying lens 53 presses the engraved plate 55 in the opposite direction (forward) from the elastic deformation portion 79, and the engraved plate 55 is pressed against a front end wall portion 89 provided on the magnifying lens 53. The magnifying lens 53 is pressed in the opposite direction (forward) from the elastic deformation portion 79 by the elastic deformation portion 79 of the magnifying lens 53 via the engraved plate 55, and the front end wall portion 89 provided on the magnifying lens 53 is pressed against a front wall portion 95a of a lens housing portion 95 provided on the lens cover 11. As a result, the components constituting the lens unit 9 (collimator lens 51, magnifying lens 53, engraved plate 55) are centered and positioned mainly in the front-to-rear direction (X direction).

[0032] Furthermore, the elastic deformation portions 79 provided on the magnifying lens 53 press the engraving plate 55 toward the opposite side (forward side) from the elastic deformation portions 79, and the engraving plate 55 is pressed against a pair of left and right front pillar portions 83 provided on the magnifying lens 53. The magnifying lens 53 is pressed toward the opposite side (forward side) from the elastic deformation portions 79 by the elastic deformation portions 79 of the magnifying lens 53 via the engraving plate 55. As a result, the pair of left and right front pillar portions 83 provided on the magnifying lens 53 are pressed against a pair of left and right front end pillar portions 91 provided on the collimating lens 51. The collimating lens 51 is pressed toward the opposite side (forward side) from the elastic deformation portions 79 by the elastic deformation portions 79 of the magnifying lens 53 via the engraving plate 55 and the magnifying lens 53. As a result, the pair of left and right front end column portions 91 provided on the collimator lens 51 are pressed against the intersection of the inner surfaces of the front wall portion 95a and the side wall portion 95c that constitute the lens accommodating portion 95 provided on the lens cover 11.

[0033] Specifically, the elastic deformation portion 79 provided on the magnifying lens 53 presses the engraving plate 55 toward the opposite side from the elastic deformation portion 79 (forward), and the plate-side inclined surface portion 93 provided on the engraving plate 55 is pressed against the rear-side inclined surface portion 83b provided on the magnifying lens 53. The magnifying lens 53 is pressed toward the opposite side from the elastic deformation portion 79 (forward) by the elastic deformation portion 79 of the magnifying lens 53 via the engraving plate 55, and the front-side inclined surface portion 83a provided on the magnifying lens 53 is pressed against the rear-side inclined surface portion 91b provided on the collimating lens 51. The collimating lens 51 is pressed toward the opposite side from the elastic deformation portion 79 (forward) by the elastic deformation portion 79 of the magnifying lens 53 via the engraving plate 55 and the magnifying lens 53. Then, the front-side inclined surface portion 91a provided on the collimating lens 51 is pressed against the cover-side inclined surface portion 99 provided on the lens cover 11. As a result, the components (collimator lens 51, magnifying lens 53, and engraved plate 55) that make up the lens unit 9 are centered and positioned mainly in the left-right direction (Y direction).

[0034] That is, the distance G in the front-to-rear direction between the front wall portion 95a and the rear wall portion 95b of the lens cover 11 is smaller (shorter) than the length L in the front-to-rear direction of the magnifying lens 53. Therefore, the collimating lens 51, the engraving plate 55, and the magnifying lens 53 are pushed toward the cover-side inclined surface portion 99 of the lens cover 11, which is the side opposite to the elastic deformation portion 79. As a result, the elastic deformation portion 79 provided on the magnifying lens 53 aligns the collimating lens 51, the engraving plate 55, and the magnifying lens 53 all at once, and the collimating lens 51, the engraving plate 55, and the magnifying lens 53 can be positioned in predetermined positions. Therefore, it is possible to significantly reduce misalignment between the lenses (collimating lens 51, magnifying lens 53) and the plate (engraving plate 55) on which a predetermined image or the like is formed, and to suppress the occurrence of misalignment of the projection area and deformation or misalignment of the projected image or the like.

[0035] As an example of assembling the lighting device 1 inside the vehicle interior, first, the lighting device 1 is mounted to a mounting portion on a wall inside the vehicle interior. Then, a vehicle-side connector (not shown) is fitted into the fitting portion 17 of the housing 3, enabling the supply of power to the lighting device 1, and the installation of the lighting device 1 inside the vehicle interior is completed.

[0036] As described above, the lighting device 1 according to this embodiment includes a housing 3 and an illumination member 5 accommodated in the housing 3 and having a light-emitting unit 41. The lighting device 1 also includes a lens unit 9 assembled to the housing 3 and transmitting light emitted from the light-emitting unit 41, and a lens cover 11 attached to the housing 3 and covering the lens unit 9. The lens unit 9 includes a first lens (collimating lens 51) disposed on the optical axis of the light emitted from the light-emitting unit 41, and a second lens (magnifying lens 53) disposed on the optical axis opposite the first lens (collimating lens 51). The lens unit 9 includes a plate (engraved plate 55) on which an image to be projected is formed, disposed between the first lens (collimating lens 51) and the second lens (magnifying lens 53). The first lens (collimating lens 51) includes a first lens body (lens body 57) and a front end wall portion 89 protruding from the front end of the first lens body (lens body 57) toward the second lens (magnifying lens 53). The second lens (magnifying lens 53) has a second lens body (lens body 61) and an elastically deformable portion 79 that protrudes from the rear end of the second lens body (lens body 61) toward the first lens (collimating lens 51) and is elastically deformable. The lens cover 11 has a lens housing portion 95 that houses the lens unit 9. The distance (distance G) between the inner walls of the lens housing portion 95 in the front-to-rear direction is smaller than the length L from the front end to the rear end of the lens unit 9.

[0037] An elastic deformation portion 79 is formed on the magnifying lens 53, and a front end wall portion 89 is formed on the collimating lens 51. When the lens unit 9 is attached to the lens cover 11, the protrusion 79a of the elastic deformation portion 79 provided on the magnifying lens 53 abuts against the inner wall (rear wall portion 95b) of the lens cover 11 (see FIGS. 4 and 6). At this time, the elastic deformation portion 79 provided on the magnifying lens 53 presses the engraving plate 55 toward the opposite side (forward) from the elastic deformation portion 79, and the engraving plate 55 is pressed against the front end wall portion 89 provided on the magnifying lens 53. The magnifying lens 53 is pressed toward the opposite side (forward) from the elastic deformation portion 79 by the elastic deformation portion 79 of the magnifying lens 53 via the engraving plate 55, and the front end wall portion 89 provided on the magnifying lens 53 is pressed against the front wall portion 95a of the lens housing portion 95 provided on the lens cover 11. As a result, the components (collimator lens 51, magnifying lens 53, and engraved plate 55) that make up the lens unit 9 are centered and positioned mainly in the front-rear direction (X direction).

[0038] As described above, according to this embodiment, by suppressing misalignment in the positional relationship between the lenses (collimator lens 51, magnifying lens 53) and the engraved plate 55 on which a predetermined pattern or the like is formed, it is possible to suppress misalignment of the projection area and deformation or misalignment of the projected pattern or the like.

[0039] In the lighting device 1, the plate (engraved plate 55) may have a plate main body 67. The first lens (collimating lens 51) may have first lens side pillars (front end pillars 91) that protrude from both left and right sides of the front end of the first lens main body (lens main body 57) toward the second lens (magnifying lens 53) and are arranged in front of the plate main body 67. The second lens (magnifying lens 53) may have second lens side pillars (front end pillars 83) that protrude from both left and right sides of the front end of the second lens main body (lens main body 61) toward the first lens (collimating lens 51). The second lens side pillars (front end pillars 83) may be arranged between the plate main body 67 and the first lens side pillars (front end pillars 91). The lens cover 11 may have a front wall 95a, a rear wall 95b, and a pair of left and right side wall portions 95c that constitute the lens housing portion 95. The intersections of the plate body 67, the second lens side column portion (front side column portion 83), the first lens side column portion (front end side column portion 91), and the front wall portion 95a and the side wall portion 95c of the lens cover 11 may each have an inclined surface portion inclined in the front-to-back direction.

[0040] The collimating lens 51, the engraving plate 55, the magnifying lens 53, and the lens cover 11 each have an inclined surface (front inclined surface 91a, rear inclined surface 91b, plate-side inclined surface 93, front inclined surface 83a, rear inclined surface 83b, and cover-side inclined surface 99). When the lens unit 9 is attached to the lens cover 11, the protrusion 79a of the elastic deformation portion 79 provided on the magnifying lens 53 comes into contact with the inner wall (rear wall portion 95b) of the lens cover 11 (see FIGS. 4 and 6). At this time, the elastic deformation portion 79 provided on the magnifying lens 53 presses the engraving plate 55 toward the side opposite to the elastic deformation portion 79 (toward the front), and the plate-side inclined surface 93 provided on the engraving plate 55 is pressed against the rear inclined surface 83b provided on the magnifying lens 53. The magnifying lens 53 is pressed toward the opposite side (forward) from the elastic deformation portion 79 by the elastic deformation portion 79 of the magnifying lens 53 via the engraved plate 55, and the front inclined surface portion 83a of the magnifying lens 53 is pressed against the rear inclined surface portion 91b of the collimating lens 51. The collimating lens 51 is pressed toward the opposite side (forward) from the elastic deformation portion 79 by the elastic deformation portion 79 of the magnifying lens 53 via the engraved plate 55 and the magnifying lens 53. Then, the front inclined surface portion 91a of the collimating lens 51 is pressed against the cover-side inclined surface portion 99 of the lens cover 11. As a result, the components constituting the lens unit 9 (collimating lens 51, magnifying lens 53, engraved plate 55) are centered and positioned mainly in the left-right direction (Y direction).

[0041] In the lighting device 1, the first lens (collimator lens 51) and the second lens (magnifying lens 53) may each be formed with a locking portion (locking frame portion 59, locking protrusion portion 65). The locking portion (locking frame portion 59) of the first lens (collimator lens 51) and the locking portion (locking protrusion portion 65) of the second lens (magnifying lens 53) may be locked together. This allows a plate (engraved plate 55) to be held between the first lens (collimator lens 51) and the second lens (magnifying lens 53).

[0042] The assembly of the magnifying lens 53 to the collimating lens 51 is completed by sandwiching the engraved plate 55 between the collimating lens 51 and the magnifying lens 53 and engaging the locking frame portion 59 of the collimating lens 51 with the locking protrusion portion 65 of the magnifying lens 53. This holds the engraved plate 55 between the collimating lens 51 and the magnifying lens 53, completing the assembly of the lens unit 9.

[0043] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment. [Explanation of symbols]

[0044] 1. Lighting equipment 3. Housing 5 Lighting components 9 Lens unit 11 Lens cover 41 Light-emitting part 51 Collimating Lens 53 Magnifying Lens 55 Engraved Plate 57 Lens body 59 Locking frame 61 Lens body 65 Locking protrusion 67 Plate body 79 Elastic deformation part 83 Front column 83a Front slope section 83b Rear slope section 89 Front end wall 91 Front end side pillar part 91a Front inclined surface section 91b Rear inclined surface section 93 Plate side inclined surface 95 Lens housing 95a Front wall 95b Rear wall 95c side wall section 99 Cover side inclined surface part G interval L length

Claims

1. Housing and an illumination member accommodated in the housing and having a light-emitting portion; a lens unit attached to the housing and transmitting light emitted from the light emitting unit; a lens cover attached to the housing and covering the lens unit, The lens unit comprises: a first lens disposed on an optical axis of light emitted from the light emitting unit; a second lens disposed on the optical axis and facing the first lens; a plate disposed between the first lens and the second lens and on which an image to be projected is formed; the first lens has a first lens body and a front end wall portion that protrudes from a front end portion of the first lens body toward the second lens side, the second lens has a second lens body and an elastically deformable portion that protrudes from a rear end of the second lens body toward the first lens and is elastically deformable; the lens cover has a lens housing portion that houses the lens unit, a front-rear distance between the inner walls of the lens housing portion is smaller than a length from a front end portion to a rear end portion of the lens unit; Lighting equipment.

2. The plate has a plate body, the first lens has first lens side pillar portions that protrude from both left and right sides of a front end portion of the first lens body toward the second lens and are disposed in front of the plate body, the second lens has second lens side pole portions that protrude from both left and right sides of a front end portion of the second lens body toward the first lens side and are disposed between the plate body and the first lens side pole portions, The lens cover has a front wall portion, a rear wall portion, and a pair of left and right side wall portions that constitute the lens housing portion, An inclined surface portion inclined with respect to the front-rear direction is formed at each of the intersections of the front wall portion and the side wall portion of the plate body, the second lens side pillar portion, the first lens side pillar portion, and the lens cover. The lighting device according to claim 1 .

3. The first lens and the second lens each have a locking portion formed thereon, The plate is held between the first lens and the second lens by engaging the locking portion of the first lens with the locking portion of the second lens.

3. The lighting device according to claim 1 or 2.

Images