In-cabin lighting device

Abstract

To provide an in-cabin lighting device that can project a pattern or the like projected from a lighting device onto a projection plane without being affected by obstacles.SOLUTION: An in-cabin lighting device 100 comprises: a projection plane part 101 formed on an interior member 111 of a vehicle; and a lighting device 1 disposed inside the interior member 111 and projecting light onto a rear face 101a of the projection plane part 101. The projection plane part 101 has a level of transparency that allows light from the lighting device 1 radiated onto the rear face 101a of the projection plane part 101 to be visible from a display face 101b side of the projection plane part 101.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] BACKGROUND ART Conventionally, there is known 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 (see Patent Document 1).

[0003] In a conventional vehicle interior lighting device, a projector (lighting device) is installed, for example, inside a door, and light emitted from the projector (lighting device) passes through an opening in the door and is irradiated onto a projection area (projection surface) on the outer surface of the door. [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 vehicle interior lighting devices, the space between an opening in an interior member such as a door trim and the projection surface is the interior space of the vehicle, and if there is an obstacle between the opening and the projection surface, the light may be blocked and not projected correctly.

[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 a vehicle interior lighting device that can project an image or the like from the lighting device onto a projection surface without being affected by obstacles. [Means for solving the problem]

[0007] An interior lighting device according to one aspect of the present invention comprises a projection surface formed in an interior member of a vehicle, and a lighting device disposed inside the interior member and projecting light onto the inner surface of the projection surface, the projection surface having a transparency such that light from the lighting device irradiated onto the inner surface of the projection surface can be seen from the outer surface side of the projection surface. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a vehicle interior lighting device that can project a pattern or the like from the lighting device onto a projection surface without being affected by obstacles. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view illustrating an example of a vehicle interior lighting device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing the vehicle interior lighting device in an off state as seen from inside the vehicle interior. [Figure 3] FIG. 2 is a perspective view showing a lighting state of the vehicle interior lighting device as seen from inside the vehicle interior. [Figure 4] 1 is a schematic plan view of a vehicle interior lighting device according to an embodiment of the present invention; [Figure 5] FIG. 2 is a front view showing the vehicle interior lighting device in an off state as seen from inside the vehicle interior. [Figure 6] FIG. 2 is a front view showing the interior lighting device in a lit state as seen from inside the vehicle interior. [Figure 7] 1 is a perspective view showing an example of a lighting device constituting a vehicle interior lighting device. [Figure 8] FIG. 2 is an exploded perspective view of a lighting device constituting the vehicle interior lighting device. DETAILED DESCRIPTION OF THE INVENTION

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

[0011] [Schematic configuration of vehicle interior lighting device 100] 1 to 6, the vehicle interior lighting device 100 according to this embodiment is disposed inside a vehicle. The vehicle interior lighting device 100 can be applied to locations or parts used in the interior of a vehicle, such as an instrument panel, pillars, dashboard, center console, roof, door trim, luggage space, map lamp, etc.

[0012] The vehicle interior lighting device 100 includes a lighting device 1 and a projection screen unit 101.

[0013] The lighting device 1 is disposed inside an interior member 111 of a vehicle (see FIGS. 1 to 4). The interior member 111 can be applied to, for example, a door trim. The interior member 111 has a projection surface 101 onto which a picture G (see FIGS. 3 and 6) projected from the lighting device 1 is projected.

[0014] The interior member 111 is made of, for example, a synthetic resin material. The interior member 111 has, for example, a member main body 113 having a through-portion connecting the inner surface (rear surface 113a) and the outer surface (front surface 113b) of the interior member 111, and a projection surface portion 101 disposed in the through-portion of the member main body 113. A cylindrical first rib 117 is formed on the periphery of the through-portion of the member main body 113, and the projection surface portion 101 having a cylindrical second rib 119 is disposed inside the first rib 117. The plate-shaped member main body 113 and the cylindrical first rib 117 are integrally formed as a continuous member, and the plate-shaped projection surface portion 101 and the cylindrical second rib 119 are integrally formed as a continuous member. The first rib 117 protrudes inward from the member main body 113, and the second rib 119 protrudes inward from the projection surface portion 101.

[0015] The member body 113 is opaque and lacks transparency to the extent that the image G from the lighting device 1 cannot be seen from the front surface 113b side when projected onto the back surface 113a of the member body 113. On the other hand, the projection surface 101 is transparent or translucent and has transparency to the extent that the image G from the lighting device 1 projected onto the back surface 101a of the projection surface 101 can be seen from the front surface 101b side.

[0016] The projection surface 101 is formed inside the interior member 111 and is configured so that a picture G from the lighting device 1 is projected onto it. At least the projection surface 101 of the interior member 111 may be formed in, for example, milky white or clear black. Furthermore, the projection surface 101 of the interior member 111 may be subjected to, for example, a grained finish or a lens cut finish. The picture-shaped light irradiated from the lighting device 1 reaches the rear surface 101a of the projection surface 101, and the picture G projected onto the rear surface 101a appears on the front surface 101b (see FIGS. 3 and 6).

[0017] The projection screen 101 may be molded integrally with the member main body 113 by two-color molding or the like. However, the method of fixing the projection screen 101 to the member main body 113 is not limited to two-color molding. The projection screen 101 may be adhered to the member main body 113, attached to the member main body 113, or engaged with the member main body 113. Alternatively, the projection screen 101 and the member main body 113 may be molded integrally using a transparent material, and a skin made of resin or the like may be provided on the surface 113b of the member main body 113.

[0018] The lighting device 1 is disposed, for example, in a mounting portion 103 (see FIGS. 1 to 4) formed inside an interior member 111. A vehicle-side connector (not shown) is disposed near the mounting portion 103 and is electrically connected to an end portion of an electric wire electrically connected to a power source. The lighting device 1 is supplied with power by mating with the vehicle-side connector. The lighting device 1 turns on and off the supply of power and is turned on or off in conjunction with, for example, the operation of a switch provided on the vehicle side or the operation of an installed component such as a door. The lighting device 1 may also 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.

[0019] In the vehicle interior lighting device 100 according to this embodiment, the lighting device 1 is disposed inside an interior member 111, and the projection surface 101 onto which the image G projected from the lighting device 1 is projected has transparency. Therefore, the image G projected from the lighting device 1 onto the back surface 101a of the projection surface 101 appears to emerge on the front surface 101b side of the projection surface 101 (see FIGS. 3 and 6). Because the lighting device 1 is disposed inside the interior member 111, no obstacles or the like come between the lighting device 1 and the back surface 101a of the projection surface 101, and the image G or the like projected from the lighting device 1 can be projected onto the projection surface (projection surface 101) as intended.

[0020] [Lighting equipment 1] As shown in FIGS. 7 and 8, 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.

[0021] The housing 3 includes a housing body 13 and a housing cover 15 .

[0022] 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 box-like shape. One side of the housing body 13 is open in the longitudinal direction, and a fitting portion 17 is provided therein, into which a vehicle-side connector (not shown) can be fitted. The housing body 13 is provided with a plurality of (four in this embodiment) busbar arrangement 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 is provided with an illumination arrangement portion 21 that communicates with one side of the busbar arrangement 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.

[0023] 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.

[0024] 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.

[0025] The lighting 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 a plurality of (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 a plurality of (four in this embodiment) contact points 45 electrically connected to the circuit pattern. The lighting member 5 is disposed in the lighting 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 lighting member 5 is press-fitted into a groove formed in a wall portion constituting the lighting arrangement portion 21, thereby holding the lighting 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 lighting arrangement portion 21 faces the opening 37 of the housing cover 15.

[0026] 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.

[0027] The lens unit 9 includes, for example, a collimator lens 51, a magnifying lens 53, and an engraved plate 55.

[0028] 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.

[0029] 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.

[0030] 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 G (see FIGS. 3 and 6) is formed as a projection image. The plate body 67 has an engraved portion 69 on which the predetermined pattern G 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.

[0031] 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 portion 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.

[0032] 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.

[0033] As an example of assembling the lighting device 1 inside the vehicle interior, first, the lighting device 1 is assembled to the placement portion 103 inside the vehicle interior (see FIGS. 1 to 4). 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 assembly of the lighting device 1 inside the vehicle interior is completed.

[0034] [Actions and Effects] As described above, the vehicle interior lighting device 100 according to this embodiment includes the projection surface 101 formed in the interior member 111 of the vehicle, and the lighting device 1 disposed inside the interior member 111 and projecting light onto the inner surface (rear surface 101a) of the projection surface 101. The projection surface 101 has a transparency such that the light from the lighting device 1 irradiated onto the inner surface (rear surface 101a) of the projection surface 101 can be seen from the outer surface (front surface 101b) side of the projection surface 101.

[0035] In the vehicle interior lighting device 100 according to this embodiment, the lighting device 1 is disposed inside an interior member 111, and the projection surface 101 onto which the light (pattern G) projected from the lighting device 1 is projected has transparency. Therefore, the pattern G or the like projected from the lighting device 1 onto the rear surface 101a of the projection surface 101 appears on the front surface 101b of the projection surface 101 (see FIGS. 3 and 6). Because the lighting device 1 is disposed inside the interior member 111, no obstacles or the like come between the lighting device 1 and the rear surface 101a of the projection surface 101, and the pattern G or the like projected from the lighting device 1 can be projected onto the projection surface (projection surface 101) as intended.

[0036] As described above, according to this embodiment, it is possible to provide the vehicle interior lighting device 100 that can project the image G or the like from the lighting device 1 onto the projection surface (projection surface unit 101) without being affected by obstacles.

[0037] In the vehicle interior lighting device 100, the interior member 111 has a member body 113, and the member body 113 may have a through-hole formed therein that penetrates from the inner surface (back surface 113a) to the outer surface (front surface 113b) of the member body 113. A cylindrical first rib 117 may be formed on the periphery of the through-hole, and a projection surface portion 101 having a cylindrical second rib 119 may be disposed inside the first rib 117.

[0038] By having the cylindrical first rib 117 and second rib 119 in the interior member 111, the strength of the periphery of the interior member 111 formed in the interior member 111 can be ensured.

[0039] In the vehicle interior lighting device 100, the member body 113 does not need to be transparent to the extent that light from the lighting device 1 cannot be seen from the outer surface (surface 113b) side of the member body 113.

[0040] While the projection surface 101 is transparent, the main body 113 of the interior member 111 is not transparent, so that the image G or the like projected from the lighting device 1 appears only on the projection surface 101 side between the main body 113 and the projection surface 101 (see Figures 3 and 6).

[0041] In the vehicle interior lighting device 100, the projection surface portion 101 may be formed in milky white or clear black.

[0042] By using projection screen 101 having a predetermined color (milky white or clear black) in this way, it is possible to project image G or the like from lighting device 1 onto projection screen 101 as intended.

[0043] In the vehicle interior lighting device 100, the projection surface 101 may be subjected to a textured finish or a lens cut finish.

[0044] By using a projection surface 101 that has been subjected to a predetermined process (embossing or lens cutting) in this manner, the image G or the like projected from the lighting device 1 can be projected onto the projection surface 101 as intended.

[0045] 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]

[0046] 1. Lighting equipment 100 Vehicle interior lighting system 101 Projection surface section 101a Back side 101b surface 111 Interior materials 113 Component body 113a back side 113b surface 117 First Rib 119 Second Rib

Claims

1. a projection surface portion formed on an interior member of a vehicle; a lighting device disposed inside the interior member and configured to project light onto the inner surface of the projection screen, the projection screen has a transparency such that light from the lighting device irradiated onto the inner surface of the projection screen can be seen from the outer surface side of the projection screen. Vehicle interior lighting system.

2. The interior member has a member body, The member body has a through-hole formed therein that penetrates the inner surface and the outer surface of the member body, a cylindrical first rib is formed on the periphery of the through-hole, and the projection surface portion having a cylindrical second rib is disposed inside the first rib. The vehicle interior lighting device according to claim 1 .

3. 3. The vehicle interior lighting device according to claim 2, wherein the member body is opaque to the extent that light from the lighting device cannot be seen from the outer surface side of the member body.

4. The vehicle interior lighting device according to claim 1 , wherein the projection surface portion is formed in a milky white or clear black color.

5. The vehicle interior lighting device according to claim 1 , wherein the projection surface is textured or lens-cut.

Images