Lighting device

Abstract

To provide a lighting device that can be made smaller and lighter. [Solution] The lighting device 10 comprises a base 16, a light source 17 disposed on the lower side of the base 16, a power supply unit 19 disposed on the upper side of the base 16 and smaller than the base 16 in plan view, and an arm 12 connected to the power supply unit 19.

Description

Technical Field

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[0001] Embodiments of the present invention relate to a lighting device.

Background Art

[0002] Conventionally, there is a high ceiling lighting device used for lighting in high spaces such as factories, warehouses, and other facilities with high ceilings. This lighting device is configured such that an arm is connected to a base having a light source disposed on the lower surface side, and a power supply unit is attached to this arm, and is attached to the ceiling side by the arm. The arm is attached to both side portions of the base and is provided with substantially the same dimensions as the width of the base.

[0003] In such a lighting device, since it is a high-place construction work, miniaturization and weight reduction are desired.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem to be solved by the present invention is to provide a lighting device that can be miniaturized and reduced in weight.

Means for Solving the Problems

[0006] The lighting device of the embodiment includes a light source, a base having a base plate portion on which the light source is disposed on the lower surface and bent downward, a power supply unit disposed on the upper surface of the base, an arm attached to the ceiling side and attached to the base, and a cover that covers the light source.

Effects of the Invention

[0007] According to the lighting device of the embodiment, it can be miniaturized and reduced in weight. [Brief explanation of the drawing]

[0008] [Figure 1] This is a plan view of a lighting device showing the first embodiment. [Figure 2] This is a front view of the same lighting device. [Figure 3] This is a side view of the same lighting device. [Figure 4] This is a bottom view of the same lighting device. [Figure 5] This is a cross-sectional view of a part of the same lighting device. [Figure 6] This is a plan view of a lighting device showing a second embodiment. [Figure 7] This is a cross-sectional view of a part of the same lighting device. [Figure 8] This is a plan view showing a third embodiment. [Modes for carrying out the invention]

[0009] The first embodiment will be described below with reference to Figures 1 to 5.

[0010] As shown in Figures 1 to 4, the lighting device 10 is a high-ceiling lighting device used, for example, to illuminate spaces with high ceilings in factories, warehouses, and other facilities.

[0011] The lighting device 10 comprises a light fixture, which is a light body 11, and an arm 12 that supports the light body 11 and is attached to the ceiling.

[0012] The lighting fixture 11 comprises a fixture body and a base 16 which is a heat sink, a light source 17 disposed on the lower side of the base 16, a cover 18 which covers the light source 17 and is attached to the base 16, and a power supply unit 19 disposed on the upper side of the base 16.

[0013] The base 16 is made of a metal plate. The base 16 is flat and rectangular, and has, for example, a square base plate portion 23, with raised portions 24 bent upwards on all four sides of this base plate portion 23. On two opposing sides of one side of the base plate portion 23, there are fall prevention portions 25 to prevent the cover 18 attached to the base 16 from falling. As shown in Figures 3 and 5, the fall prevention portions 25 are cut and bent from the center of the width direction of the raised portion 24, and bent into a roughly U-shape toward the underside of the base plate portion 23, and are positioned opposite each other on the underside of the base plate portion 23 with a predetermined distance between them. The tip of the fall prevention portion 25 is formed in an arc shape. In addition, a wiring hole is provided in the center of the base plate portion 23 through which a wire for electrically connecting the light source 17 and the power supply unit 19 is inserted.

[0014] Furthermore, a light-emitting module 29 is used as the light source 17. The light-emitting module 29 has a rectangular substrate 30 and a plurality of light-emitting elements 31 mounted on the surface side of the substrate 30. Semiconductor light-emitting elements such as LEDs and organic ELs are used as the light-emitting elements 31. The circuit board 30 is positioned with its back side facing the underside of the base plate portion 23 of the base 16 and is fixed to the base plate portion 23 with multiple screws. In the center of the circuit board 30, there is a wiring hole through which wires for electrically connecting the light source 17 and the power supply unit 19 are inserted, which communicates with the wiring hole in the base plate portion 23. Note that the light source 17 may be something other than the light-emitting module 29, such as a lamp.

[0015] The cover 18 also covers the light-emitting module 29 and is attached to the lower side of the base 16. The cover 18 has a lower portion 35, a side portion 36 provided around the lower portion 35, and a flange portion 37 that protrudes outward from the upper side of the side portion. The cover 18 is translucent in whole or at least on its lower side.

[0016] The side portion 36 has four corners that are curved, and a recessed portion 38 is provided in the center of each side in the width direction.

[0017] On each side of the flange portion 37, an engaging portion 39 that engages with and positions on the outer surface of the upright portion 24 of the base 16 is provided to project. The flange portions 37 on both sides of one pair of opposites are arranged in a state of being inserted into the gaps between the fall prevention portions 25 on both sides of the base 16 and the base plate portion 23. With one flange portion 37 inserted into the gap between the fall prevention portion 25 and the base plate portion 23 and the cover 18 shifted to one side, the other flange portion 37 is opposed to the gap between the fall prevention portion 25 and the base plate portion 23, and the cover 18 is moved so as to be shifted to the other side, whereby the flange portions 37 on both sides are arranged in a state of being inserted into the gaps between the fall prevention portions 25 on both sides of the base 16 and the base plate portion 23. By opposing the recessed portions 38 provided on the side surface portion 36 of the cover 18 to the fall prevention portions 25 on both sides of the base 16, it is possible to move the cover 18 to one side or the other. Further, the four corners of the flange portion 37 are attached to the base plate portion 23 with screws 40.

[0018] Also, the power supply unit 19 includes a power supply case 44 that is a power supply box, a terminal block 45 and a power supply circuit 46 housed in the power supply case 44. [[ID=:5]]

[0019] The power supply case 44 is made of metal and is attached to the center of the upper surface side of the base plate portion 23 with screws or the like.

[0020] In plan view, the power supply case 44 has an outer shape smaller than that of the base 16 and is provided in a rectangular shape. In plan view, each side of the power supply case 44 faces parallel to each side of the base 16, and both sides in the longitudinal direction are arranged to face the sides provided with the fall prevention portions 25 of the base 16.

[0021] The power supply case 44 has an upper surface portion 47 and a side surface portion 48, and the lower surface side of the power supply case 44 is open. The side surface portion 48 has first side surface portions 48a on both sides in the longitudinal direction and second side surface portions 48b on both sides in the short side direction. The opening on the lower surface side of the power supply case 44 is closed by the base plate portion 23 by attachment to the base plate portion 23. Note that the power supply case 44 may be configured as a hexahedron with the lower surface side also closed.

[0022] The terminal block 45 is mounted on the power supply case 44 facing an opening provided on one of the second side surfaces 48b of the power supply case 44. Power lines supplying external power from an external power source such as a commercial AC power supply are electrically connected to the terminal block 45.

[0023] The power supply circuit 46 comprises a circuit board and power supply circuit components mounted on this circuit board, and is mounted within the power supply case 44 at a position above the midpoint of the vertical height of the power supply case 44, with at least the circuit board positioned above the midpoint of the vertical height of the power supply case 44. The power supply circuit 46 converts external power supplied through the terminal block 45 into a predetermined lighting power and supplies it to the light-emitting module 29 to light up the light-emitting element 31.

[0024] The arm 12 is made of metal, has a roughly U-shape overall, and is attached to the power supply unit 19. The arm 12 has a pair of arm mounting parts 52 that are attached to the power supply unit 19, an arm body 53 that is attached to the ceiling, and an angle adjustment part 54 that connects the arm mounting parts 52 and the arm body 53 in an angle-adjustable manner.

[0025] The pair of arm mounting portions 52 are attached to the first side portions 48a on both sides of the power supply unit 19 in the longitudinal direction, at their widthwise center positions, by a plurality of screws 55. The upper ends of the arm mounting portions 52 are positioned to protrude above the power supply unit 19.

[0026] The arm body 53 has a long upper arm portion 56 that is attached to the ceiling, and a pair of arm side portions 57 that are bent from both ends in the longitudinal direction of the upper arm portion 56, and is formed in a substantially U shape. The upper arm portion 56 is provided with a pair of mounting holes 58 for attachment to the ceiling. The pitch P of the pair of mounting holes 58 is arranged at a predetermined mounting pitch P for attachment to the ceiling. One of the mounting holes 58 is a round hole, and the other mounting hole 58 is an elongated hole that is long in the width direction and intersects the longitudinal direction. A hole 59 is provided in the center of the upper arm portion 56 between the pair of mounting holes 58, which is used for inserting power lines, etc.

[0027] The angle adjustment section 54 connects the arm mounting section 52 and the arm side portion 57 of the arm body 53, which is positioned to overlap the outside of the arm mounting section 52, in a way that allows for angle adjustment. The angle adjustment section 54 is rotatably connected using a pivot bolt 60 that passes through the arm mounting section 52 and the arm side portion 57 of the arm body 53, and a nut 61 that screws onto the pivot bolt 60, as well as being connected in a way that allows for angle adjustment using an adjustment bolt 62 that passes through the arm mounting section 52 and the arm side portion 57 of the arm body 53, and a nut 63 that screws onto the adjustment bolt 62. The side portion 57 of the arm body 53 is provided with an arc-shaped elongated hole 64 centered on a hole through which the pivot shaft bolt 60 is inserted, and the angle can be adjusted within the range in which the adjustment bolt 62 abuts against each end of the elongated hole 64 in the longitudinal direction.

[0028] Then, during the installation of the lighting device 10, the arm body 53 is attached to the ceiling structure by bolts or the like that are inserted through a pair of mounting holes 58 of the arm body 53.

[0029] The angle between the arm mounting portion 52 and the arm body 53 is adjusted via the angle adjustment portion 54 so that the light emitted from the lamp body 11 is directed directly downwards. After this adjustment, the pivot shaft bolt 60 and adjustment bolt 62 of the angle adjustment portion 54 are tightened to fix the arm mounting portion 52 and the arm body 53 in a non-rotatable position.

[0030] Connect the power lines to the terminal block 45 of the power supply unit 19, and the installation is complete.

[0031] When external power is supplied to the power supply unit 19, the power supply unit 19 supplies lighting power to the light-emitting module 29, and the light-emitting element 31 lights up.

[0032] When the light is on, the heat generated by the light-emitting element 31 is mainly transferred to the base 16 and dissipated into the air from the base 16. The heat generated by the power supply circuit 46 is mainly transferred to the power supply case 44 and from the power supply case 44 to the arm 12, and dissipated from the power supply case 44 and the arm 12.

[0033] In the lighting device 10 configured in this way, the arm 12 is connected to the power supply unit 19, which has an external shape smaller than the base 16 in a plan view. Therefore, compared to the case where the arm 12 is connected to both sides of the base 16, the length of the upper surface portion 56 of the arm can be shortened, making the arm 12 smaller and lighter. As a result, the lighting device 10 can be made smaller and lighter, improving ease of installation when working at high places.

[0034] Furthermore, in order to accommodate the miniaturization and weight reduction of the power supply unit 19, if the power supply unit 19 is provided in a rectangular shape in plan view, by connecting the arms 12 to both sides in the longitudinal direction of the power supply unit 19, it is possible to secure mounting dimensions for attaching the arms 12 to the ceiling side, that is, it is possible to secure dimensions for providing a pair of mounting holes 58 that are arranged at a predetermined mounting pitch.

[0035] Furthermore, the direction in which the angle can be adjusted, which intersects with the direction in which both ends of the arm 12 are connected, is the direction in which the light fixture 11 is most likely to sway. However, since the power supply unit 19 is positioned so that its shorter side faces the direction in which it is most likely to sway, the center of gravity of the power supply unit 19 is brought closer to the center, thereby suppressing the sway.

[0036] Furthermore, the flange portion 37 of the cover 18, which is attached to the lower surface of the base 16 with screws 40, is positioned between the base plate portion 23 and the fall prevention portion 25. Therefore, even if the flange portion 37, which is under load from tightening the screws 40, deteriorates and breaks, the fall prevention portion 25 can support the flange portion 37, preventing the cover 18 from falling.

[0037] Next, Figures 6 and 7 show a second embodiment.

[0038] The power supply unit 19 has a power supply mounting section 70 that is disposed on the upper side of the base 16. The power supply mounting section 70 is provided on the side surface 48 of the power supply case 44, and is bent outward from the lower side of the first side surface 48a on both sides in the longitudinal direction.

[0039] The arm mounting portion 52 is provided with an arm fixing portion 71 that is bent outward from the lower side of the arm mounting portion 52. The arm fixing portion 71 is positioned on top of the upper side of the power supply mounting portion 70, which is located on the upper side of the base 16.

[0040] The arm fixing part 71, the power supply mounting part 70, and the base 16 are fastened together by a plurality of screws 72, which are fasteners, so that the arm 12 is connected to the power supply unit 19. The circuit board 30 of the light-emitting module 29 may also be fastened together with screws 72.

[0041] As in this configuration, the base 16, power supply unit 19, and arm 12 can be fastened together as a single unit. Compared to configurations where each component is attached individually, the number of parts and assembly man-hours can be reduced, thereby improving manufacturability.

[0042] Furthermore, as shown in the third embodiment in Figure 8, the power supply unit 19 may be provided in a square shape in plan view, provided that its external shape is smaller than that of the base 16 in plan view. Also, the power supply unit 19 may be a rectangle with a longer length in the direction intersecting the direction in which the arms of the power supply unit 19 are connected, provided that its external shape is smaller than that of the base 16 in plan view and that it has sufficient dimensions to provide a pair of mounting holes 58 arranged at a predetermined mounting pitch.

[0043] The angle adjustment section 54 of the arm 12 may be located on the side of the power supply unit 19.

[0044] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0045] 10 Lighting devices 12 arms 16 Bass 17 Light source 19 Power supply section

Claims

1. Light source and; The light source is disposed on the lower surface and the base has a base plate portion that is bent downwards; A power supply unit disposed on the upper surface of the base; An arm that is attached to the ceiling and also to the base; A cover that covers the light source; A lighting device characterized by having the following features.

2. The base is bent in a substantially U-shape toward the lower side of the base plate portion, and is positioned opposite the bent base plate portion at a predetermined distance from the lower surface of the base plate portion. The lighting device according to claim 1, characterized by the features described above.

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