Luminaire

Abstract

To provide a low-cost luminaire that enables selection of a plurality of irradiation ranges.SOLUTION: A luminaire 1 comprises: a housing 3; a lighting member 5 which is housed in the housing 3 and which has a light emission part 37; and a lens 9 which is assembled to the housing 3 and which is penetrated by light from the light emission part 37. The lens 9 is provided with a plurality of prism parts 53 that set different irradiation ranges of the transmitted light from the light emission part 37. The plurality of prism parts 53 are arranged so that an arrangement position with respect to the light emission part 37 can be varied.SELECTED DRAWING: Figure 8

Description

[Technical Field]

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

[0002] Conventionally, a known lighting device includes a housing, a circuit board as a lighting member housed in the housing and having a light-emitting diode as a light-emitting portion, and a lens attached to the housing and transmitting light from the light-emitting diode (see Patent Document 1). This lighting device is placed, for example, in the passenger compartment of a vehicle, and transmits light from the light-emitting diode through the lens to illuminate the interior of the passenger compartment. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-13674 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the lighting device such as that disclosed in Patent Document 1, the illumination range where light is irradiated through a lens is limited to a predetermined range. In a conventional lighting device, if multiple illumination ranges were to be selectable, for example, it would be necessary to provide multiple light-emitting units and multiple circuit patterns on the lighting component, which could increase costs.

[0005] The present invention has been made in view of the problems inherent in the conventional technology, and an object of the present invention is to provide a lighting device that is low cost and allows selection of multiple illumination ranges. [Means for solving the problem]

[0006] The lighting device of this embodiment comprises a housing, a lighting member housed in the housing and having a light-emitting portion, and a lens assembled to the housing and transmitting light from the light-emitting portion, the lens having a plurality of prism portions that vary the irradiation range of the light transmitted from the light-emitting portion, and the plurality of prism portions are arranged so that their positions relative to the light-emitting portion can be changed. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a lighting device that allows selection of a plurality of illumination ranges at low cost. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of an illumination device according to an embodiment of the present invention. [Figure 2] 1 is a perspective view of an illumination device according to an embodiment of the present invention. [Figure 3] FIG. 2 is an exploded perspective view of the lighting device according to the embodiment. [Figure 4] FIG. 2 is a top view of the lighting device according to the embodiment. [Figure 5] FIG. 5 is a cross-sectional view of FIG. 4 . [Figure 6] FIG. 6 is an enlarged view of a main part of FIG. 5. [Figure 7] 10 is a bottom view of the lighting device according to the embodiment when the lens is moved to a wide illumination range. FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7. [Figure 9] 10 is a bottom view of the lighting device according to the embodiment when the lens is moved to a narrower illumination range. FIG. [Figure 10] XX cross-sectional view of FIG. 9. [Figure 11] FIG. 2 is a perspective view of an illumination member of the illumination device according to the embodiment. [Figure 12] FIG. 2 is a perspective view of an illumination member of the illumination device according to the embodiment. [Figure 13] FIG. 2 is a perspective view of the lighting device according to the embodiment when it is being mounted on a wall. DETAILED DESCRIPTION OF THE INVENTION

[0009] 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.

[0010] As shown in FIGS. 1, 2, and 13, an illumination device 1 according to this embodiment is applied to, for example, a vehicle illumination device that illuminates the interior of a vehicle. The illumination device 1 is disposed, for example, in an arrangement portion 103 formed by penetrating a wall portion 101 inside the vehicle interior. A vehicle-side connector 107 is disposed near the wall portion 101 and electrically connected to an end portion of an electric wire 105 that is electrically connected to a power source (not shown). Power is supplied to the illumination device 1 by fitting the vehicle-side connector 107. The illumination device 1 turns on and off by interlocking the supply of power with, for example, the operation of a switch portion (not shown) provided on the vehicle side or the operation of an installed component (not shown) such as a door.

[0011] As shown in FIGS. 1 to 13, the lighting device 1 includes a housing 3, a lighting member 5, a bus bar 7, and a lens 9.

[0012] As shown in FIGS. 1 to 10 and 13, the housing 3 includes a first housing 11 and a second housing 13. The first housing 11 and the second housing 13 are made of a plastic.

[0013] The first housing 11 is made of an insulating material such as a synthetic resin that does not transmit light. The first housing 11 is formed in a housing shape that can be inserted into the arrangement portion 103 of the wall portion 101. The first housing 11 has an opening on one side in the lengthwise direction and is provided with a fitting portion 15 into which a vehicle-side connector 107 can be fitted. The first housing 11 is provided with a plurality (two in this example) of bus bar arrangement portions 17 that communicate with the other side of the fitting portion 15 in the lengthwise direction and in which a bus bar 7 is arranged. The first housing 11 is provided with an illumination arrangement portion 19 that communicates with one side of the bus bar arrangement portion 17 in the height direction and in which an illumination member 5 is arranged. A plurality (two in this example) of locking protrusions 21 protrude outward from the outer surface of the first housing 11 as a member continuous with the first housing 11.

[0014] The second housing 13 is made of an insulating material such as a light-opaque synthetic resin. The second housing 13 covers the outer surface of the first housing 11 on the lighting arrangement portion 19 side and is formed in a plate shape larger than the arrangement portion 103 of the wall portion 101. On the first housing 11 side of the second housing 13, a plurality of (here, two) locking pieces 23 having locking holes engageable with the locking protrusions 21 of the first housing 11 extend elastically toward the first housing 11 side as a member continuous with the second housing 13. The locking pieces 23 have locking holes engageable with the locking protrusions 21 of the first housing 11. The engagement between the locking holes of the locking pieces 23 and the locking protrusions 21 maintains the assembled state of the first housing 11 and the second housing 13. On both longitudinal sides of the second housing 13 on the first housing 11 side, a plurality of locking claws 25 extend elastically toward the first housing 11 side as a member continuous with the second housing 13 (here, two on one longitudinal side and one on the other longitudinal side). The distance between the plate-like portion of the second housing 13 and the locking claw 25 is set to be equal to the thickness of the wall 101. When the first housing 11 is inserted into the arrangement portion 103 of the wall 101, the locking claw 25 engages with the edge of the arrangement portion 103. The engagement between the locking claw 25 and the edge of the arrangement portion 103 makes it possible to maintain the lighting device 1 attached to the wall 101.

[0015] A lens arrangement section 27 in which a lens 9 is arranged is provided on the side of the second housing 13 opposite the first housing 11. The lens arrangement section 27 has an oval through-hole 29 that exposes the lighting arrangement section 19 of the first housing 11. On both sides of the through-hole 29 in the width direction of the lens arrangement section 27, guide engagement sections 31 are provided, each penetrating the plate-shaped portion of the second housing 13 and extending along the length of the plate-shaped portion. An engagement protrusion 33 protrudes inside the guide engagement section 31. On both sides of the length direction of the lens arrangement section 27, display sections 35 that indicate the state of the illumination range of the illumination device 1 are provided. Note that here, one display section 35 indicates a wide illumination range, and the other display section 35 indicates a narrow illumination range.

[0016] As shown in Figures 3, 5, 6, 8, and 10 to 12, the lighting member 5 is made of a circuit board on which a circuit pattern is formed. One surface of the lighting member 5 is provided with one light-emitting unit 37, such as an LED, that illuminates the interior of the vehicle, and multiple (here, two) electronic components 39 for illuminating the light-emitting unit 37. The other surface of the lighting member 5 is provided with multiple (here, two) contact points 41 that are electrically connected to the circuit pattern. The lighting member 5 is inserted through an opening in the lighting arrangement portion 19 so that the contact points 41 are positioned on the outer surface of the lighting arrangement portion 19 of the first housing 11, and is arranged in the lighting arrangement portion 19. At this time, the outer edge of the lighting member 5 is press-fit into a groove formed in a wall that constitutes the lighting arrangement portion 19, and the lighting member 5 is held relative to the first housing 11. The lighting member 5 arranged in the lighting arrangement portion 19 has the light emitting portion 37 arranged in the through hole 29 of the second housing 13 by assembling the second housing 13 to the first housing 11 .

[0017] As shown in FIGS. 3, 5, and 6, the busbar 7 is made of a conductive material. The busbar 7 is formed in a plate shape and has a length spanning the busbar arrangement portion 17 of the first housing 11 and the fitting portion 15, and a plurality of busbars (two in this example) are used. One longitudinal side of the busbar 7 forms a tab-shaped connection portion 43, and the other longitudinal side forms an elastically deformable resilient contact portion 45. The busbar 7 is inserted through an opening of the busbar arrangement portion 17 of the first housing 11 and arranged in the busbar arrangement portion 17. 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 portion 17, and the busbar 7 is held relative to the first housing 11. The busbar 7 arranged in the busbar arrangement portion 17 is arranged so that the connection portion 43 is arranged inside the fitting portion 15 and the resilient contact portion 45 is exposed to the lighting arrangement portion 19. When the bus bar 7 is placed in the bus bar arrangement section 17 and the lighting member 5 is placed in the lighting arrangement section 19, the elastic contact portion 45 comes into contact with the contact portion 41, and the bus bar 7 is electrically connected to the lighting member 5. When the vehicle-side connector 107 (see FIG. 13 ) is fitted into the fitting portion 15 of the bus bar 7 electrically connected to the lighting member 5, the connection portion 43 is electrically connected to the vehicle-side connector 107, and power can be supplied to the lighting member 5.

[0018] As shown in Figures 1, 3, 5, and 7 to 10, the lens 9 is made of an insulating material such as a light-transmitting synthetic resin. The lens 9 is formed in a plate shape that can be placed in the lens placement portion 27 of the second housing 13 and is set to be shorter than the length of the lens placement portion 27. An illumination unit 47 and an operation unit 49 are provided on the surface of the lens 9 opposite the housing 3. The illumination unit 47 is located in the center of the lens 9 so as to correspond to the light-emitting unit 37 of the illumination member 5 and is formed with a smooth surface. The illumination unit 47 transmits light from the light-emitting unit 37 and illuminates the interior of the vehicle. The operation unit 49 is located on both sides of the lens 9 in the longitudinal direction and consists of multiple protrusions provided across the width of the lens 9 so as to be slightly curved toward the longitudinal direction of the lens 9. The operation unit 49 is operated by, for example, a passenger when moving the lens 9 relative to the housing 3.

[0019] On both widthwise sides of the lens 9 on the housing 3 side, guide engagement pieces 51 are provided. The guide engagement pieces 51 are each a member continuous with the lens 9, protruding toward the second housing 13 and having engagement holes extending along the length of the lens 9. The length of the guide engagement pieces 51 is set shorter than the length of the guide engagement portion 31 of the lens placement portion 27 of the second housing 13. The guide engagement pieces 51 are inserted into the guide engagement portions 31 when the lens 9 is placed in the lens placement portion 27 of the second housing 13. At this time, the engagement holes of the guide engagement pieces 51 engage with the engagement protrusions 33 of the guide engagement portions 31. The engagement between the engagement holes of the guide engagement pieces 51 and the engagement protrusions 33 of the guide engagement portions 31 maintains the lens 9 attached to the second housing 13. Because the length of the guide engagement pieces 51 is shorter than the length of the guide engagement portions 31, the lens 9 can move along the length of the second housing 13 when attached to the second housing 13. At this time, the movement of the lens 9 is guided by the insertion of the guide engagement piece 51 into the guide engagement portion 31. In addition, the movement range of the lens 9 is restricted by the end of the guide engagement piece 51 abutting against the edge of the guide engagement portion 31. Within the movement range of the lens 9, the irradiation portion 47 of the lens 9 is disposed so as to face the through-hole 29 of the second housing 13.

[0020] A plurality of (here, two) prism portions 53 are provided on the second housing 13 side of the illumination portion 47 of the lens 9. The plurality of prism portions 53 are each a member continuous with the lens 9 and protrude toward the light-emitting portion 37 of the illumination member 5 so as to be inserted into the through-hole 29 of the second housing 13. The plurality of prism portions 53 transmit light from the light-emitting portion 37 and have shapes set so as to vary the illumination range of the light emitted from the illumination portion 47. For example, here, one prism portion 53 (the prism portion 53 located on the left side in FIG. 8) diffuses the light from the light-emitting portion 37 widely, causing the illumination portion 47 to illuminate a wide range. The other prism portion 53 (the prism portion 53 located on the right side in FIG. 10) diffuses the light from the light-emitting portion 37 narrowly, causing the illumination portion 47 to illuminate a narrow range.

[0021] The positions of the multiple prism units 53 relative to the light-emitting unit 37 are variable by moving the lens 9 relative to the housing 3. For example, as shown in FIGS. 7 and 8 , when one prism unit 53 is positioned opposite the light-emitting unit 37 by moving the lens 9 relative to the housing 3, the illumination unit 47 can illuminate a wide range. At this time, the display unit 35 has an indication indicating a wide illumination range exposed inside the vehicle cabin, indicating that the illumination unit 47 is illuminating a wide range. As shown in FIGS. 9 and 10 , when the other prism unit 53 is positioned opposite the light-emitting unit 37 by moving the lens 9 relative to the housing 3, the illumination unit 47 can illuminate a narrow range. At this time, the display unit 35 has an indication indicating a narrow illumination range exposed inside the vehicle cabin, indicating that the illumination unit 47 is illuminating a narrow range. By arranging the multiple prism units 53 so that their positions relative to the light-emitting unit 37 can be changed in this way, the illumination range of a single light-emitting unit 37 can be changed. Therefore, there is no need to provide multiple light-emitting units 37 or multiple circuit patterns in the illumination member 5, which allows for lower costs. In addition, the multiple prism units 53 are provided integrally with the lens 9 that is movable relative to the housing 3, so that the arrangement position relative to the light-emitting units 37 can be changed by moving the lens 9 relative to the housing 3. Therefore, there is no need to provide a structure between the lens 9 and the multiple prism units 53 that allows the multiple prism units 53 to move, which allows for a simpler structure and lower costs.

[0022] As an example of assembling such lighting device 1, first, the bus bar 7 and the lighting member 5 are assembled to the first housing 11. Next, the second housing 13 is assembled to the first housing 11. Then, the lens 9 is assembled to the second housing 13, thereby completing the assembly of the lighting device 1. Note that the second housing 13 to which the lens 9 has been assembled in advance may be assembled to the first housing 11.

[0023] As an example of assembling the lighting device 1 inside the vehicle interior, first, the housing 3 is inserted into the placement portion 103 of the wall portion 101, and the lighting device 1 is assembled to the wall portion 101. Then, the vehicle-side connector 107 is fitted into the fitting portion 15 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.

[0024] Such lighting device 1 includes a housing 3, a lighting member 5 housed in the housing 3 and having a light-emitting unit 37, and a lens 9 attached to the housing 3 and transmitting light emitted from the light-emitting unit 37. The lens 9 is provided with a plurality of prism portions 53 that vary the illumination range of the light emitted from the light-emitting unit 37. The plurality of prism portions 53 are arranged so that their positions relative to the light-emitting unit 37 can be changed.

[0025] By arranging the multiple prism portions 53 so that their positions relative to the light-emitting portion 37 can be changed, it is possible to change the illumination range with one light-emitting portion 37. This eliminates the need to provide multiple light-emitting portions 37 or multiple circuit patterns in the illumination member 5, thereby reducing costs.

[0026] Therefore, with such lighting device 1, it is possible to select a plurality of illumination ranges at low cost.

[0027] Furthermore, the lens 9 is movably attached to the housing 3. The plurality of prism portions 53 are provided so as to be movable integrally with the lens 9, and the position of the prism portions 53 relative to the light-emitting portion 37 is changed by the movement of the lens 9 relative to the housing 3.

[0028] The multiple prism portions 53 are provided integrally with the lens 9, which is movable relative to the housing 3, and therefore the arrangement position relative to the light-emitting portion 37 can be changed by moving the lens 9 relative to the housing 3. Therefore, there is no need to provide a structure between the lens 9 and the multiple prism portions 53 that allows the multiple prism portions 53 to move, which simplifies the structure and reduces costs.

[0029] 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.

[0030] For example, although the lighting device according to the present embodiment has two prism sections, the number of prism sections may be three or more. In this case, the range of movement of the lens relative to the housing or the range of movement of the prism sections relative to the lens may be increased.

[0031] Furthermore, although the lens is arranged to move linearly relative to the housing, this is not limiting, and the movement of the lens relative to the housing may take any form, such as forming the lens into a disk shape and arranging the lens to rotate relative to the housing. [Explanation of symbols]

[0032] 1. Lighting equipment 3. Housing 5 Lighting components 9 Lenses 37 Light-emitting part 53 Prism part

Claims

1. Housing and an illumination member accommodated in the housing and having a light-emitting portion; a lens attached to the housing and transmitting light emitted from the light emitting unit; Equipped with the lens is provided with a plurality of prism portions that change the irradiation range of the light emitted from the light emitting portion, The prism portions are arranged so that their positions relative to the light-emitting portion can be changed.

2. the lens is movably mounted to the housing; The lighting device according to claim 1 , wherein the plurality of prism portions are provided so as to be movable integrally with the lens, and the positions of the prism portions relative to the light-emitting portion are changed by movement of the lens relative to the housing.

Images