Lighting device

Abstract

To provide a lighting system that can be installed in a small-diameter mounting hole.SOLUTION: In a lighting system including a luminaire body configured so as to be mountable to a mounting hole formed on an installation surface, the luminaire body includes a light source unit, a support arm for supporting the light source unit, a horizontal rotating mechanism, a vertical turning mechanism, and a light distribution angle variation mechanism, the support arm includes a horizontal rotation part having a horizontal rotating shaft, a first support arm part extended from one end of the horizontal rotation part, and a second support arm part that is extended from the other end of the horizontal rotation part and is provided opposite to the first support arm, is configured so as to rotatably support a light source unit between the first support arm and the second support arm, and is configured such that distance from the first support arm part to the horizontal rotational shaft of the horizontal rotation part differs from distance from the second support arm to the horizontal rotational shaft of the horizontal rotation part, and the vertical turning mechanism and the light distribution angle variation mechanism are arranged in different positions in a peripheral direction of the light source unit.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] Conventionally, there has been a downlight-type lighting device including an angle adjustment device for adjusting the angle of a light source, the angle adjustment device including a frame body, a horizontal rotation part rotatably supported in the horizontal direction by the frame body, a vertical rotation part rotatably supported in the vertical direction by the horizontal rotation part and having the light source fixed thereto, a first drive part for driving the horizontal rotation part, and a second drive part for driving the vertical rotation part, wherein the first drive part and the second drive part are arranged symmetrically with respect to the center line of the light source (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above-described conventional lighting device, it is necessary to incorporate all mechanisms inside a frame body that is embedded in a recess provided in an indoor ceiling. Since a first drive part for driving a horizontal rotation part and a second drive part for driving a vertical rotation part are arranged symmetrically with respect to the center line of the light source, the frame body becomes large, and there is a problem that the recess for embedding the lighting device cannot be made small.

[0005] Further, in the conventional lighting device, since the first drive part and the second drive part are arranged on the same circumference inside the frame body, there is no space for incorporating a light distribution angle variation mechanism for changing the light distribution angle of the light source, and there is a problem that it is functionally inferior to a lighting device provided with a light distribution angle variation mechanism.

[0006] The present invention has been made in view of such problems, and an object thereof is to provide a lighting device that can be installed in a mounting hole having a small diameter.

Means for Solving the Problems

[0007] The lighting device according to the present invention is a lighting device including a lighting fixture main body configured to be attachable to a mounting hole formed in an installation surface, wherein the lighting fixture main body includes a light source unit having a light source and a lens provided so as to face the light source, a support arm that supports the light source unit, a horizontal rotation mechanism that rotates the support arm in a direction horizontal to the installation surface, a vertical turning mechanism that turns the light source unit along a direction intersecting the installation surface, and a light distribution angle variation mechanism that varies a distance between the light source and the lens of the light source unit. The support arm has a horizontal rotation part having a horizontal rotation axis, a first support arm part extending from one end of the horizontal rotation part, and a second support arm part extending from the other end of the horizontal rotation part and provided facing the first support arm. The horizontal rotation part is configured to be attachable to the horizontal rotation mechanism, and is configured to rotatably support the light source unit between the first support arm part and the second support arm part. A distance from the first support arm part to the horizontal rotation axis of the horizontal rotation part and a distance from the second support arm part to the horizontal rotation axis of the horizontal rotation part are configured to have different lengths. The vertical turning mechanism and the light distribution angle variation mechanism are arranged at different positions in the circumferential direction of the light source unit.

[0008] In the lighting device according to the present invention, the vertical turning mechanism and the light distribution angle variation mechanism may be arranged to face each other in the circumferential direction of the light source unit.

[0009] In the lighting device according to the present invention, the support arm may be configured such that the first support arm part and the second support arm part have different shapes.

[0010] In the lighting device according to the present invention, the lighting fixture main body further includes a heat radiating portion having a plurality of fins, and the horizontal rotation axis of the horizontal rotation portion of the support arm is configured in a cylindrical shape through which a cable can be inserted into the horizontal rotation axis. The heat radiating portion is disposed at the rear of the light source unit, and a gap through which the cable can be inserted may be provided between the plurality of fins.

[0011] The lighting device according to the present invention further includes a fixture mounting frame that can be fixed to the mounting hole and to which the lighting fixture main body can be mounted. The lighting fixture main body further includes a body portion that can accommodate the light source unit, a fixture for attaching the body portion to the fixture mounting frame, and an attachment auxiliary portion. The fixture mounting frame includes a fixture mounting hole through which the lighting fixture main body can be inserted and a fixture engaging portion that can engage with the fixture. The fixture is configured to be deformable between a deformed state in which it can pass through the fixture mounting hole of the fixture mounting frame and a restored state in which it engages with the fixture engaging portion after insertion. The attachment auxiliary portion may be configured to be temporarily fixed so as to maintain the fixture in the deformed state before being attached to the fixture engaging portion.

[0012] In the lighting device according to the present invention, the fixture may be a torsion coil spring.

Effects of the Invention

[0013] According to the present invention, it is possible to provide a lighting device that can be installed in a mounting hole having a small diameter.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

[0015] Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. Note that the following embodiments do not limit the invention according to each claim, and not all combinations of the features described in the embodiments are essential for the solution means of the invention. Also, the drawings are schematic diagrams that have been appropriately emphasized, omitted, or adjusted in ratio to show the present invention, and may differ from the actual shape, positional relationship, and ratio

[0016] [Configuration of the Lighting Device According to this Embodiment] First, referring to FIGS. 1 to 3, the lighting device 1 according to an embodiment of the present invention will be outlined. As shown in FIG. 1, the lighting device 1 according to the present embodiment is a downlight-type lighting device including a lighting fixture main body 10 configured to be attachable to a mounting hole formed in an installation surface. The lighting fixture main body 10 includes a light source unit 20, a support arm 100 that supports the light source unit 20, a horizontal rotation mechanism 30 that rotates the support arm 100 in a direction horizontal to the installation surface, a vertical turning mechanism 40 that turns the light source unit 20 along a direction intersecting the installation surface, and a light distribution angle variation mechanism 50 that varies the distance between a light source LS and a lens FL (described later) of the light source unit 20. The vertical turning mechanism 40 and the light distribution angle variation mechanism 50 are arranged at different positions in the circumferential direction of the light source unit 20. As shown in FIG. 5, the support arm 100 is attached to a rear housing 25 (described later) of the light source unit 20 of the lighting fixture main body 10. The vertical turning mechanism 40 and the light distribution angle variation mechanism 50 are arranged to face each other in the circumferential direction of the light source unit 20 outside the support arm 100.

[0017] As shown in FIGS. 2 and 14, the lighting device 1 further includes a fixture mounting frame 200 that can be fixed to the mounting hole and to which the lighting fixture main body 10 can be attached, a DC power supply device PS that supplies power to the lighting fixture main body 10, and a cable C that connects the lighting fixture main body 10 and the DC power supply device PS. As shown in FIGS. 2 and 3, the lighting fixture main body 10 further includes a heat dissipation part 60, a body part 70 that can accommodate the light source unit 20, a plurality (two in the present embodiment) of fixtures 80 that attach the body part 70 to the fixture mounting frame 200, and an attachment auxiliary part 90. Note that the number of fixtures 80 is not limited to a plurality, and only one may be provided.

[0018] In the following description, the side of the light distribution angle variation mechanism 50 of the lighting fixture main body 10 will be described as the right side, and the side of the vertical turning mechanism 40 will be described as the left side. [Configuration of Lighting Fixture Main Body] Next, details of each component of the lighting fixture main body 10 will be described. As shown in FIG. 4, the light source unit 20 has a light source LS and a lens FL provided so as to face the light source LS. Further, the light source unit 20 further has a resin front housing 21, an aluminum die-cast rear housing 25, and a lens holder 23 attached to the front housing 21, and the front housing 21 is coaxially attached to the rear housing 25.

[0019] As shown in FIG. 8, the front housing 21 is formed in a cylindrical shape and has an inner diameter capable of attaching the lens holder 23. Further, the front housing 21 further has a slider cover 22 that is slidably connected to one end 56 of a slider 54 of a light distribution angle fluctuation mechanism 50 described later at the right circumferential portion. The lens holder 23 is formed in a cylindrical shape that can be fitted into the front housing 21 and has an inner diameter capable of attaching the lens FL. Further, the lens holder 23 further has a slider fixing portion (not shown) to which one end 56 of the slider 54 can be attached.

[0020] As shown in FIG. 4, a light source pedestal 26 is provided on the front surface of the rear housing 25 facing the front housing 21, and a heat radiating portion 60 is provided on the back surface (see FIG. 13). The light source LS is attached to the light source pedestal 26. The light source LS is a high-intensity light source of the 2500 lm class. In the present embodiment, the light source LS is a chip-on-board (COB) light-emitting diode (LED) that can be dimmed and color-adjusted, but is not limited thereto, and various arbitrary configurations can be adopted.

[0021] A first shaft hole (not shown) and a second shaft hole (not shown) for attaching the support arm 100 are respectively formed in the left and right portions of the rear housing 25. The first shaft hole and the second shaft hole are formed at positions shifted by 180° in the circumferential direction of the rear housing 25 and at the center of gravity position of the light source unit 20 in the axial direction of the light source unit 20 formed by connecting the front housing 21 and the rear housing 25. By having such a configuration, the light source unit 20 can perform a vertical turning operation with the center of gravity position as the rotation center.

[0022] As shown in FIG. 4, the light source pedestal 26 is configured to protrude toward the front housing 21 so as to be located within the internal space of the front housing 21 in a state where the front housing 21 and the rear housing 25 are connected. By having such a configuration, since the resin front housing 21 is lighter than the aluminum rear housing 25, the center of gravity of the entire light source unit 20 is prevented from shifting toward the rear housing 25 side.

[0023] As shown in FIGS. 4 and 8, the lens FL is movably attached along the irradiation axis direction of the light source LS via a lens holder 23 inside the front housing 21. In the present embodiment, the lens FL is a Fresnel lens, but it is not limited thereto, and various arbitrary configurations can be adopted. The lens FL is configured to be movable along the irradiation axis direction of the light source LS by driving the light distribution angle fluctuation mechanism 50. By having such a configuration, in the light source unit 20, the distance between the lens FL and the light source LS changes, and the light distribution angle of the light emitted from the light source LS can be adjusted.

[0024] FIG. 6 is a view in which a part of the horizontal rotation motor box of the horizontal rotation mechanism is omitted. As shown in FIG. 6, the horizontal rotation mechanism 30 includes a horizontal rotation motor box 31, a horizontal rotation motor 32 disposed inside the horizontal rotation motor box 31, a horizontal rotation worm gear 33 (horizontal rotation worm 34 and horizontal rotation worm wheel 35), a bearing (not shown) that rotatably supports the horizontal rotation axis 112 of a later-described horizontal rotation portion 110 of the support arm 100, a horizontal rotation wave washer (not shown), a horizontal rotation lock nut 37 attached to the tip of the horizontal rotation axis 112, an encoder attachment arm 38, and a horizontal rotation encoder (not shown).

[0025] The horizontal rotation motor box 31 is provided with a hole (not shown) through which the horizontal rotation axis 112 can be inserted at the bottom. Further, the horizontal rotation motor box 31 is configured to be attachable to the body portion 70 at the bottom.

[0026] The worm 34 for horizontal rotation is attached to the motor 32 for horizontal rotation and is configured to transmit the rotation of the motor 32 for horizontal rotation to the worm wheel 35 for horizontal rotation. The worm wheel 35 for horizontal rotation, the bearing, the wave washer for horizontal rotation, and the lock nut 37 for horizontal rotation have an inner diameter through which the horizontal rotation shaft 112 can be inserted, and are inserted into the horizontal rotation shaft 112 in the order of the bearing, the worm wheel 35 for horizontal rotation, the wave washer for horizontal rotation, and the lock nut 37 for horizontal rotation. As a result, the lock nut 37 for horizontal rotation is fixed to the horizontal rotation shaft 112, and the worm wheel 35 for horizontal rotation and the lock nut 37 for horizontal rotation are engaged with each other via the wave washer for horizontal rotation. By having such a configuration, the horizontal rotation shaft 112 can be rotatably supported, and the rotation of the motor 32 for horizontal rotation can be transmitted to the horizontal rotation shaft 112 via the worm gear 33 for horizontal rotation and the lock nut 37 for horizontal rotation. Further, since the worm wheel 35 for horizontal rotation and the lock nut 37 for horizontal rotation are engaged with each other via the wave washer for horizontal rotation, when a strong external force is applied to the horizontal rotation shaft 112, the worm wheel 35 for horizontal rotation can idle, preventing the horizontal rotation mechanism 30 from being damaged.

[0027] Further, the lock nut 37 for horizontal rotation is integrally provided with an encoder mounting arm 38. The encoder mounting arm 38 has a bent shape that rises upward from the lock nut 37 for horizontal rotation and bends at a plurality of locations, and its tip is located above the rotation axis of the horizontal rotation shaft 112, the worm wheel 35 for horizontal rotation, and the lock nut 37 for horizontal rotation. A horizontal rotation encoder for detecting the horizontal rotation angle of the horizontal rotation shaft 112, and thus the support arm 100 and the light source unit 20, is attached to the tip of the encoder mounting arm 38. Since various known configurations can be adopted for the horizontal rotation encoder, a detailed description thereof is omitted.

[0028] By having such a configuration, the horizontal rotation mechanism 30 transmits the driving force of the horizontal rotation motor 32 to the horizontal rotation shaft 112 via the horizontal rotation worm gear 33, thereby configuring the support arm 100 and the light source unit 20 to be rotatable in the horizontal direction with respect to the installation surface.

[0029] FIG. 7 is a view in which a part of the vertical rotation motor box of the vertical rotation mechanism is omitted. As shown in FIG. 7, the vertical rotation mechanism 40 includes a vertical rotation motor box 41, a vertical rotation motor 42 disposed within the vertical rotation motor box 41, a vertical rotation worm gear 43 (vertical rotation worm 44 and vertical rotation worm wheel 45), a vertical rotation wave washer (not shown), a vertical rotation lock nut 46 attached to the tip of the fourth shaft portion 127 of the first support arm portion 120 of the support arm 100 described later, and a vertical rotation encoder (not shown).

[0030] The vertical rotation motor box 41 is configured to be attachable to the left side portion of the rear housing 25 of the light source unit 20, and is provided with a hole (not shown) through which the fourth shaft portion 127 of the first support arm portion 120 can be inserted on the surface attached to the rear housing 25. Further, the vertical rotation motor box 41 is provided with a pedestal (not shown) on the extension line of the fourth shaft portion 127 of the first support arm portion 120.

[0031] A vertical rotation encoder for detecting the vertical rotation angle of the fourth shaft portion 127 of the first support arm portion 120 and thus the light source unit 20 is attached to the pedestal. Since various known configurations can be adopted for the vertical rotation encoder, a detailed description thereof is omitted.

[0032] The worm 44 for vertical rotation is attached to the motor 42 for vertical rotation and is configured to transmit the rotation of the motor 42 for vertical rotation to the worm wheel 45 for vertical rotation. The worm wheel 45 for vertical rotation, the wave washer for vertical rotation, and the lock nut 46 for vertical rotation have an inner diameter through which the fourth shaft portion 127 of the first support arm portion 120 can be inserted, and are inserted into the fourth shaft portion 127 of the first support arm portion 120 in the order of the worm wheel 45 for vertical rotation, the wave washer for vertical rotation, and the lock nut 46 for vertical rotation. Thereby, the lock nut 46 for vertical rotation is fixed to the fourth shaft portion 127 of the first support arm portion 120, and the worm wheel 45 for vertical rotation and the lock nut 46 for vertical rotation are engaged with each other via the wave washer for vertical rotation. By having such a configuration, the fourth shaft portion 127 of the first support arm portion 120 is rotatably supported, and the rotation of the motor 42 for vertical rotation can be transmitted to the fourth shaft portion 127 of the first support arm portion 120 via the worm gear 43 for vertical rotation and the lock nut 46 for vertical rotation. Further, since the worm wheel 45 for vertical rotation and the lock nut 46 for vertical rotation are engaged with each other via the wave washer for vertical rotation, when a strong external force is applied to the fourth shaft portion 127 of the first support arm portion 120, the worm wheel 45 for vertical rotation idles, thereby preventing the vertical rotation mechanism 40 from being damaged.

[0033] With such a configuration, the vertical rotation mechanism 40 is configured to be rotatable along a direction intersecting the installation surface of the light source unit 20 by transmitting the driving force of the motor 42 for vertical rotation to the fourth shaft portion 127 of the first support arm portion 120 via the worm gear 43 for vertical rotation.

[0034] FIG. 8 is a diagram in which a part of the motor box for driving the lens of the light distribution angle fluctuation mechanism is omitted. As shown in FIG. 8, the light distribution angle variation mechanism 50 includes a lens drive motor box 51, a lens drive motor 52 disposed within the lens drive motor box 51, a pinion 53 attached to the lens drive motor 52, a slider 54 that converts the rotational motion of the lens drive motor 52 into a translational motion, and a lens drive encoder (not shown). The lens drive motor box 51 is configured to be attachable to the right side portion of the rear housing 25 of the light source unit 20, avoiding the second shaft hole provided in the rear housing 25, and is arranged such that each component of the light distribution angle variation mechanism 50 is positioned inside the second support arm portion 130 of the support arm 100 described later.

[0035] Further, a lens drive encoder for detecting the rotation amount of the lens drive motor 52 and thus the movement amount of the lens FL of the light source unit 20 is attached to the lens drive motor box 51. Since various known configurations can be adopted for the lens drive encoder, a detailed description thereof is omitted.

[0036] The slider 54 has a rack 55 that can mesh with the pinion 53, and one end portion 56 is configured to be attachable to the slider fixing portion of the lens holder 23 of the light source unit 20. With such a configuration, the light distribution angle variation mechanism 50 is configured such that when the lens drive motor 52 rotates, the lens holder 23 moves via the slider 54, and the distance between the lens FL and the light source LS of the light source unit 20 changes.

[0037] [Configuration of Support Arm] Next, the details of each component of the support arm 100 will be described. As shown in FIGS. 5 and 9, the support arm 100 includes a horizontal rotation part 110 having a horizontal rotation axis 112, a first support arm part 120 extending from one end of the horizontal rotation part 110, and a second support arm part 130 that extends from the other end of the horizontal rotation part 110 and is provided opposite to the first support arm part 120. The horizontal rotation part 110 is configured to be attachable to the horizontal rotation mechanism 30. The support arm 100 is configured to rotatably support the light source unit 20 between the first support arm part 120 and the second support arm part 130. Further, as shown in FIG. 10, the distance from the first support arm part 120 to the horizontal rotation axis 112 of the horizontal rotation part 110 and the distance from the second support arm part 130 to the horizontal rotation axis 112 of the horizontal rotation part 110 are configured to have different lengths.

[0038] As shown in FIG. 9, the horizontal rotation part 110 includes a horizontal rotation axis 112 and a horizontal support arm part 114 that extends radially from the lower end of the horizontal rotation axis 112. The horizontal rotation axis 112 is configured in a cylindrical shape through which the cable C can be inserted. As shown in FIG. 10, the horizontal support arm part 114 has different left and right lengths extending from the horizontal rotation axis 112, and the side of the second support arm part 130 (right side) is longer. The horizontal rotation part 110 having such a configuration is configured to be attached to the horizontal rotation mechanism 30 by inserting the horizontal rotation axis 112 into a hole provided in the horizontal rotation motor box 31 of the horizontal rotation mechanism 30.

[0039] As shown in FIGS. 9 and 10, the first support arm part 120 includes a first extension part 122 that extends circumferentially from one end of the horizontal support arm part 114 so as to be orthogonal to the horizontal support arm part 114, a second extension part 124 that extends vertically from the first extension part 122, a third extension part 126 that extends from the second extension part 124 toward the axis center of the first shaft hole of the rear housing 25 of the light source unit 20, a fourth shaft part 127 that is the tip of the third extension part 126 and extends outward from the axis center of the first shaft hole, and a hole 128 provided in the fourth shaft part 127.

[0040] As shown in FIGS. 9 and 10, the second support arm portion 130 includes a first extension portion 132 that extends circumferentially from the other end of the horizontal support arm portion 114 so as to be orthogonal to the horizontal support arm portion 114, a second extension portion 134 that extends vertically from the first extension portion 132, a third extension portion 136 that extends from the second extension portion 134 toward the axis of the second shaft hole of the rear housing 25 of the light source unit 20, and a hole 138 provided at the tip of the third extension portion 136 on the axis of the second shaft hole. The tip of the first extension portion 132 is chamfered along the arc of the mounting hole. By having such a configuration, the support arm 100 can rotate horizontally without interfering with the mounting hole.

[0041] The support arm 100 having such a configuration is configured such that the first support arm portion 120 and the second support arm portion 130 have different shapes. Specifically, the first extension portion 122 of the first support arm portion 120 and the first extension portion 132 of the second support arm portion 130 have different lengths, and the first extension portion 122 of the first support arm portion 120 is longer than the first extension portion 132 of the second support arm portion 130. Also, the second extension portion 124 of the first support arm portion 120 and the second extension portion 134 of the second support arm portion 130 have different lengths, and the second extension portion 134 of the second support arm portion 130 is longer than the second extension portion 124 of the first support arm portion 120. Further, the third extension portion 126 of the first support arm portion 120 and the third extension portion 136 of the second support arm portion 130 have different lengths, and the third extension portion 126 of the first support arm portion 120 is longer than the third extension portion 136 of the second support arm portion 130. Also, the length from one end of the horizontal support arm portion 114 of the horizontal rotation portion 110 to the tip of the first extension portion of the first support arm portion 120 and the length from the other end of the horizontal support arm portion 114 to the tip of the first extension portion 132 of the second support arm portion 130 are each shorter than the radius of the body portion 70.

[0042] Furthermore, the angle formed by the second extension portion 124 and the third extension portion 126 of the first support arm portion 120 is different from the angle formed by the second extension portion 134 and the third extension portion 136 of the second support arm portion 130. Specifically, as shown in FIG. 11, the angle formed by the second extension portion 124 and the third extension portion 126 of the first support arm portion 120 is configured such that when the light source unit 20 is vertically rotated to the maximum extent, the second extension portion 124 and the third extension portion 126 do not interfere with the vertical rotation motor box 41 of the vertical rotation mechanism 40. Also, as shown in FIG. 12, the angle formed by the second extension portion 134 and the third extension portion 136 of the second support arm portion 130 is configured such that when the light source unit 20 is vertically rotated to the maximum extent, the second extension portion 134 and the third extension portion 136 do not interfere with the lens drive motor box 51 of the light distribution angle variation mechanism 50.

[0043] The support arm 100 is configured to rotatably support the light source unit 20 from the left and right sides of the rear housing 25 by inserting a first vertical rotation shaft (not shown) into the hole 128 of the first support arm portion 120 and the first shaft hole of the rear housing 25, and inserting a second vertical rotation shaft (not shown) into the hole 138 of the second support arm portion 130 and the second shaft hole of the rear housing 25.

[0044] By having the above configuration, the support arm 100 can suppress the overall width of the lighting fixture main body 10 to be short even when the vertical rotation mechanism 40 is disposed outside the first support arm portion 120 and the light distribution angle variation mechanism 50 is disposed inside the second support arm portion 130.

[0045] As shown in FIG. 13, the heat radiating portion 60 has a plurality of fins F. The heat radiating portion 60 is arranged at the rear portion of the light source unit 20, and a gap through which the cable C can be inserted is provided between the plurality of fins F. This gap is configured to serve as a cable guide. The plurality of fins F are arranged asymmetrically left and right with the gap as the boundary. Specifically, a larger number of the plurality of fins F are provided on the right side of the light source unit 20 (the side of the second support arm portion 130 of the support arm 100), and are configured in a shape and arrangement that do not interfere with the support arm 100, the vertical turning mechanism 40, and the light distribution angle fluctuation mechanism 50. By having such a configuration, the heat radiating portion 60 can exhaust the heat generated by the high-brightness light source LS of 2500 lm class of the light source unit 20 with high heat radiation efficiency.

[0046] As shown in FIG. 2, the body portion 70 has a circular top plate portion 72, a peripheral wall portion 74 extending vertically from the periphery of the top plate portion 72, an outer edge portion 76 extending outward in the circumferential direction from the tip of the peripheral wall portion 74, and a fixture holding portion 78 arranged outside the peripheral wall portion 74. The top plate portion 72 has a hole (not shown) through which the horizontal rotation axis 112 of the horizontal rotation portion 110 of the support arm 100 can be inserted, and is configured such that the horizontal rotation mechanism 30 can be attached to the upper surface.

[0047] The peripheral wall portion 74 can accommodate the light source unit 20 to which the support arm 100, the vertical turning mechanism 40, and the light distribution angle fluctuation mechanism 50 are attached inside, and is configured to be insertable into an appliance mounting hole 210 (to be described later) of the appliance mounting frame 200. The outer diameter of the outer edge portion 76 is larger than that of the appliance mounting hole 210. The fixture holding portion 78 is provided at a plurality of locations (two locations in this embodiment) and is arranged opposite to each other in the circumferential direction of the peripheral wall portion 74. Note that the fixture holding portion 78 is not limited to a configuration in which a plurality are provided, and may be provided at only one location.

[0048] The fixture 80 is configured to be deformable between a deformed state in which it can pass through the fixture mounting hole 210 of the fixture mounting frame 200 and a restored state in which it engages with a fixture engaging portion 220 (to be described later) of the fixture mounting frame 200 after insertion. In the present embodiment, the fixture 80 is a torsion coil spring. As shown in FIG. 2, the torsion coil spring 80 has a coil portion 82 attached to the fixture holding portion 78 of the body portion 70. It is inserted into the fixture mounting hole 210 in a state where the spring is compressed (deformed state), and the body portion 70 is configured to be attached to the fixture mounting frame 200 by engaging the arm portion 84 with the fixture engaging portion 220 by the restoring force of the spring (see FIG. 3).

[0049] As shown in FIGS. 2 and 3, the attachment auxiliary portion 90 is provided on the left side of the horizontal rotation motor box 31 of the horizontal rotation mechanism 30, and is configured to be able to temporarily fix the torsion coil spring 80 before being attached to the fixture engaging portion 220 so as to maintain it in a deformed state. Specifically, the attachment auxiliary portion 90 has a claw portion capable of hanging the tip of the arm portion 84 of the torsion coil spring 80. By hanging the tip of the arm portion 84 of the torsion coil spring 80 in the deformed state on the claw portion, the fixture 80 is temporarily fixed in the deformed state by the restoring force of the spring.

[0050] The lighting fixture main body 10 having the above configuration is configured to be installable in a small-diameter mounting hole with a diameter of 175 mm or less, specifically, a mounting hole with a diameter of 150 mm, formed in the installation surface via the fixture mounting frame 200.

[0051] [Configuration of Fixture Mounting Frame] As shown in FIG. 14, the fixture mounting frame 200 is a mounting fixture installed on an installation surface having a mounting hole such as a ceiling. The fixture mounting frame 200 includes a fixture mounting hole 210 through which the lighting fixture main body 10 can be inserted and a fixture engaging portion 220 that can engage with the fixture 80.

[0052] The fixture mounting frame 200 specifically includes, as shown in FIG. 2, a frame portion 230 having a cylindrical portion 232 and an outer edge portion 234 extending outward in the circumferential direction from one end of the cylindrical portion 232, a plurality (two in this embodiment) of fixture engaging portions 220 provided opposite to each other in the circumferential direction of the cylindrical portion 232, and a plurality (three in this embodiment) of slide fittings 240 provided between the fixture engaging portions 220 in the circumferential direction of the cylindrical portion 232. The cylindrical portion 232 of the frame portion 230 has a fixture mounting hole 210 through which the peripheral wall portion 74 of the body portion 70 of the lighting fixture main body 10 can be inserted. Note that the fixture engaging portions 220 and the slide fittings 240 are not limited to a configuration in which a plurality are provided, and may be provided at only one location.

[0053] The fixture engaging portion 220 is provided with claws on the back surface (the inner side in the circumferential direction of the frame portion 230) that can hook the arm portion 84 of the torsion coil spring 80. The frame portion 230 is formed such that the outer diameter of the cylindrical portion 232 is smaller than the diameter of the mounting hole, and the outer diameter of the outer edge portion 234 is larger than the diameter of the mounting hole. In this embodiment, the frame portion 230 has an outer diameter of the cylindrical portion 232 less than 150 mm and an outer diameter of the outer edge portion 234 larger than 150 mm so as to be mounted in a mounting hole with a diameter of 150 mm. The tip of the slide portion 242 of the slide fitting 240 is formed in a key claw shape, and is configured such that the tip of the slide portion 242 engages with the installation surface.

[0054] With such a configuration, the fixture mounting frame 200 can mount the lighting fixture main body 10 inside the frame portion 230, and by the slide portion 242 of the slide fitting 240 resting on the installation surface, the lighting fixture main body 10 is configured to be fixable to the mounting hole in the installation surface.

[0055] The DC power supply device PS converts the AC voltage supplied from indoor wiring or the like into a DC voltage, and supplies the DC voltage transformed to an appropriate voltage value to the light source unit 20, the horizontal rotation mechanism 30, the vertical turning mechanism 40, and the light distribution angle fluctuation mechanism 50 of the lighting fixture main body 10.

[0056] As shown in FIGS. 14 and 15, one end of the cable C is connected to the DC power supply device PS, and the other end passes through the gap between the horizontal rotation motor box 31 of the horizontal rotation mechanism 30 of the lighting fixture main body 10, the horizontal rotation shaft 112 of the horizontal rotation portion 110 of the support arm 100, and the heat dissipation portion 60 and is connected to the light source unit 20.

[0057] [Installation Method of the Lighting Device According to the Present Embodiment] Next, the installation method of the lighting device 1 will be outlined. First, the lighting device 1 is fixed to the mounting holes provided on the installation surface by the fixture mounting frame 200. Specifically, the fixture mounting frame 200 is inserted into the mounting holes with the slide portion 242 of the slide fitting 240 folded. Then, by sliding the slide portion 242 below the slide fitting 240, the slide portion 242 opens, and the tip of the slide portion 242 engages with the inner surface of the installation surface. As a result, the installation surface is clamped by the slide portion 242 and the outer edge portion 234, and the fixture mounting frame 200 is fixed to the installation surface.

[0058] Next, the DC power supply device PS connected by the lighting fixture main body 10 and the cable C is inserted from the fixture mounting hole 210 of the fixture mounting frame 200 to the inside of the installation surface and mounted on the inner surface of the installation surface. The lighting fixture main body 10 is inserted into the fixture mounting hole 210 with the torsion coil spring 80 on the left side (vertical turning mechanism 40 side) temporarily fixed in a deformed state to the mounting auxiliary portion 90 and the torsion coil spring 80 on the right side (light distribution angle fluctuation mechanism 50 side) held in a deformed state by the user.

[0059] After being inserted into the fixture mounting hole 210, first, the arm portion 84 of the torsion coil spring 80 on the right side is hung on one of the fixture engaging portions 220 of the fixture mounting frame 200. Further, the arm portion 84 of the temporarily fixed torsion coil spring 80 on the left side is hung on the other fixture engaging portion 220. As shown in FIG. 14, the lighting fixture main body 10 is fixed to the mounting hole of the installation surface by the left and right torsion coil springs 80 engaging with the fixture engaging portions 220 of the fixture mounting frame 200. Through the above steps, the lighting device 1 according to the present embodiment is installed.

[0060] [Operation of the lighting fixture body according to this embodiment] Next, the operation of the lighting fixture body 10 according to this embodiment will be described with reference to FIGS. 16 and 17. As shown in FIGS. 16 and 17, in the lighting fixture body 10 according to this embodiment, when the horizontal rotation motor 32 of the horizontal rotation mechanism 30 is driven, the support arm 100 and the light source unit 20 rotate horizontally with respect to the installation surface, and when the vertical rotation motor 42 of the vertical rotation mechanism 40 is driven, the light source unit 20 rotates along the direction intersecting the installation surface.

[0061] Specifically, the light source unit 20 can rotate along the direction intersecting the installation surface until the angle θ formed by the vertical central axis (vertical axis) VA of the lighting fixture body 10 and the optical axis OA of the light source LS of the light source unit 20 becomes at most 40°, and can rotate 180° to the left and right in the horizontal direction. That is, by combining these movements, the lighting fixture body 10 can perform a nodding operation within a range of 80° in the maximum vertical direction and 360° in the horizontal direction.

[0062] In addition, in the lighting fixture body 10 according to this embodiment, when the lens drive motor 52 of the light distribution angle fluctuation mechanism 50 rotates, the distance between the lens FL of the light source unit 20 and the light source LS changes, and the light distribution angle fluctuates.

[0063] [Control method of the lighting fixture body according to this embodiment] The control system of the lighting fixture body 10 according to this embodiment is integrated in the DC power supply device PS. The DC power supply device PS includes a communication module (not shown), a main control unit (not shown), and a storage unit (not shown). The communication module performs two-way wireless communication with, for example, a remote controller for remote operation, a smartphone, a tablet terminal, etc. When a plurality of lighting devices 1 are installed, wireless communication is possible between the communication modules of the DC power supply devices PS of each lighting device 1, and thus a mesh-type network enabling two-way wireless communication between the plurality of lighting devices 1 can be constructed.

[0064] The main control unit transmits and receives information to and from the communication module, and controls the entire lighting fixture body 10. The storage unit stores information and the like sent from the communication module via the main control unit, and also stores various programs and the like necessary for operating the lighting fixture body 10.

[0065] In addition, the main control unit includes a light source control unit (not shown) that controls the light source LS of the light source unit 20 of the lighting fixture body 10, and an attitude control unit (not shown) that controls each motor 32, 42, 52 of the lighting fixture body 10. The light source control unit performs on / off control, dimming control, and color temperature control of the light source LS.

[0066] The attitude control unit controls each motor 32, 42, 52 to perform horizontal rotation operation control, vertical swivel operation control, and light distribution control of the lighting fixture body 10. Specifically, the attitude control unit controls the horizontal rotation operation of the support arm 100 and the light source unit 20 by performing drive control of the horizontal rotation motor 32 of the horizontal rotation mechanism 30, controls the vertical swivel operation of the light source unit 20 by performing drive control of the vertical swivel motor 42 of the vertical swivel mechanism 40, and performs light distribution angle control by performing drive control of the lens drive motor 52 of the light distribution angle variation mechanism 50.

[0067] [Applications of the lighting device according to the present embodiment] The lighting device 1 according to the present embodiment is, for example, a lighting fixture installed in general houses, public facilities such as schools, art museums, museums, and libraries, or commercial facilities such as showrooms and retail stores. It is not limited to the use as a downlight that illuminates the floor surface from the ceiling, and can also be used to illuminate exhibits like a spotlight or as indirect lighting to illuminate the wall surface. In addition, since it can be installed in a small-diameter mounting hole formed in the installation surface, it can be used for various beautiful lighting effects without damaging the appearance of the installation surface.

[0068] [Advantages of the lighting device according to the present embodiment] As described above, the lighting device 1 according to the present embodiment is a lighting device including a lighting fixture main body 10 configured to be attachable to a mounting hole formed in an installation surface. The lighting fixture main body 10 includes a light source unit 20 having a light source LS and a lens FL provided so as to face the light source LS, a support arm 100 that supports the light source unit 20, a horizontal rotation mechanism 30 that rotates the support arm 100 in a direction horizontal to the installation surface, a vertical turning mechanism 40 that turns the light source unit 20 along a direction intersecting the installation surface, and a light distribution angle variation mechanism 50 that varies the distance between the light source LS and the lens FL of the light source unit 20. The support arm 100 has a horizontal rotation portion 110 having a horizontal rotation axis 112, a first support arm portion 120 extending from one end of the horizontal rotation portion 110, and a second support arm portion 130 that extends from the other end of the horizontal rotation portion 110 and is provided facing the first support arm portion 120. The horizontal rotation portion 110 is configured to be attachable to the horizontal rotation mechanism 30, and is configured to rotatably support the light source unit 20 between the first support arm portion 120 and the second support arm portion 130. The distance from the first support arm portion 120 to the horizontal rotation axis 112 of the horizontal rotation portion 110 and the distance from the second support arm portion 130 to the horizontal rotation axis 112 of the horizontal rotation portion 110 are configured to have different lengths. The vertical turning mechanism 40 and the light distribution angle variation mechanism 50 are arranged at different positions in the circumferential direction of the light source unit 20.

[0069] And, by having such a configuration, the lighting device 1 according to the present embodiment can be miniaturized, and can be installed in a mounting hole having a small diameter of 175 mm or less, specifically a mounting hole having a diameter of 150 mm, formed in the installation surface, and has the advantages that it can perform a nodding operation and change the light distribution angle within the mounting hole.

[0070] Further, in the lighting device 1 according to the present embodiment, the vertical turning mechanism 40 and the light distribution angle variation mechanism 50 are arranged to face each other in the circumferential direction of the light source unit 20. By having such a configuration, since it is possible to bring the center of gravity of the lighting fixture main body 10 closer to the rotation axis of the vertical turning of the light source unit 20, there is an advantage that a small motor with a reduced driving force can be adopted for the vertical turning motor 42.

[0071] Furthermore, in the lighting device 1 according to the present embodiment, the support arm 100 is configured such that the first support arm portion 120 and the second support arm portion 130 have different shapes. By providing such a configuration, there is an advantage that the lighting fixture main body 10 can be miniaturized by shaping the first support arm portion 120 and the second support arm portion 130 to match the movable ranges of the vertical turning mechanism 40 and the light distribution angle fluctuation mechanism 50, respectively.

[0072] Moreover, in the lighting device 1 according to the present embodiment, the lighting fixture main body 10 further includes a heat radiating portion 60 having a plurality of fins F. The horizontal rotation axis 112 of the horizontal rotation portion 110 of the support arm 100 is configured in a cylindrical shape through which a cable C can be inserted. The heat radiating portion 60 is disposed at the rear of the light source unit 20, and a gap through which the cable C can be inserted is provided between the plurality of fins F. By providing such a configuration, when the light source unit 20 is vertically turned, the bent cable C can be accommodated in the gap, so that the overall length of the lighting fixture main body 10 can be shortened and the twisting of the cable C can be suppressed.

[0073] In addition, the lighting device 1 according to the present embodiment further includes a fixture mounting frame 200 that can be fixed to the mounting hole and to which the lighting fixture main body 10 can be mounted. The lighting fixture main body 10 further includes a body portion 70 that can accommodate the light source unit 20, a fixture 80 that attaches the body portion 70 to the fixture mounting frame 200, and an attachment auxiliary portion 90. The fixture mounting frame 200 includes a fixture mounting hole 210 through which the lighting fixture main body 10 can be inserted and a fixture engaging portion 220 that can engage with the fixture 80. The fixture 80 is configured to be deformable between a deformed state in which it can pass through the fixture mounting hole 210 of the fixture mounting frame 200 and a restored state in which it engages with the fixture engaging portion 220 after insertion. The attachment auxiliary portion 90 is configured to be able to temporarily fix the fixture 80 before being attached to the fixture engaging portion 220 so as to maintain it in the deformed state. By having such a configuration, compared with the case where the lighting fixture main body 10 is directly fixed to the mounting hole with a leaf spring or the like, it has the advantage of being able to suppress vibration during the pitching operation. Also, it has the advantage of improving workability when installing in a mounting hole with a small diameter.

[0074] Furthermore, in the lighting device 1 according to the present embodiment, the fixture 80 is a torsion coil spring. By having such a configuration, since the lighting fixture main body 10 and the fixture mounting frame 200 can be fixed with a small engaging portion, it has the advantage of being able to miniaturize the lighting fixture main body 10 and the fixture mounting frame 200.

[0075] In addition, the lighting device 1 according to the present embodiment, by having the above configuration, can achieve the minimum volume with a maximum vertical swing of 40° within a mounting hole with a diameter of 150 mm while mounting a high-brightness LED light source LS in the 2500 lm class, a heat dissipation portion 60 that exhausts the heat of the light source LS, and three motors including a horizontal rotation motor 32, a vertical rotation motor 42, and a lens drive motor 52.

[0076] Furthermore, the lighting device 1 according to the present embodiment is configured to be attachable to a mounting hole with a diameter of 150 mm. Thus, compared with a conventional lighting device attachable to a mounting hole with a diameter of 175 mm, the mounting hole provided in the installation surface can be made smaller. As a result, the lighting device 1 can achieve miniaturization of the mounting hole that meets the needs of the current housing situation where high airtightness and heat insulation are emphasized, and has the advantage that it can be installed without impairing the airtightness of the house.

[0077] [Modification Example] As described above, the preferred embodiments of the present invention have been described. However, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be made to the above embodiments.

[0078] For example, in the above-described embodiment, the vertical turning mechanism 40 and the light distribution angle fluctuation mechanism 50 have been described as being arranged to face each other in the circumferential direction of the light source unit 20. However, the present invention is not limited to this, and they may not be arranged to face each other in the circumferential direction.

[0079] In the above-described embodiment, the support arm 100 has been described as having the first support arm portion 120 and the second support arm portion 130 configured in different shapes. However, the present invention is not limited to this, and the first support arm portion 120 and the second support arm portion 130 may be configured in the same shape.

[0080] In the above-described embodiment, the lighting fixture main body 10 further includes a heat dissipation portion 60 having a plurality of fins F. The horizontal rotation axis 112 of the horizontal rotation portion 110 of the support arm 100 is configured in a cylindrical shape through which a cable C can be inserted. The heat dissipation portion 60 is arranged at the rear of the light source unit 20 and has been described as having a gap through which the cable C can be inserted between the plurality of fins F. However, the present invention is not limited to this. The lighting fixture main body 10 may not include the heat dissipation portion 60, and the horizontal rotation axis 112 of the horizontal rotation portion 110 of the support arm 100 may be a solid axis.

[0081] In the above-described embodiment, the lighting device 1 further includes a fixture mounting frame 200 that can be fixed to the mounting hole and to which the lighting fixture body 10 can be mounted. The lighting fixture body 10 further includes a body portion 70 that can accommodate the light source unit 20, a fixture 80 that attaches the body portion 70 to the fixture mounting frame 200, and a mounting auxiliary portion 90. The fixture mounting frame 200 includes a fixture mounting hole 210 through which the lighting fixture body 10 can be inserted and a fixture engaging portion 220 that can engage with the fixture 80. The fixture 80 is configured to be deformable between a deformed state in which it can pass through the fixture mounting hole 210 of the fixture mounting frame 200 and a restored state in which it engages with the fixture engaging portion 220 after insertion. The mounting auxiliary portion 90 is configured to be able to temporarily fix the fixture 80 before it is attached to the fixture engaging portion 220 so as to maintain the deformed state. However, the present invention is not limited to this. The lighting device 1 can adopt various arbitrary configurations as long as it can fix the lighting fixture body 10 to the mounting hole. For example, it may be configured to directly fix the lighting fixture body 10 to the mounting hole.

[0082] In the above-described embodiment, the fixture 80 has been described as a torsion coil spring, but the present invention is not limited to this, and a leaf spring or the like may also be used.

[0083] In the above-described embodiment, the lens FL of the light source unit 20 has been described on the premise that it is a single lens, but the present invention is not limited to this, and the light source unit 20 may have a plurality of lenses.

[0084] In the above-described embodiment, the installation surface has been described on the premise that it is the ceiling of a building, but the present invention is not limited to this, and the installation surface may be the floor or wall surface of a building or the like.

Explanation of Reference Numerals

[0085] 1 Lighting device 10 Lighting fixture body 20 Light source unit 21 Front housing 22 Slide cover 23 Lens holder 25 Rear housing 26 Light source pedestal 30 Horizontal rotation mechanism 31 Motor box for horizontal rotation 32 Motor for horizontal rotation 33 Worm gear for horizontal rotation 34 Worm for horizontal rotation 35 Worm wheel for horizontal rotation 37 Locknut for horizontal rotation 38 Encoder mounting arm 40 Vertical swivel mechanism 41 Motor box for vertical swivel 42 Motor for vertical swivel 43 Worm gear for vertical swivel 44 Worm for vertical swivel 45 Worm wheel for vertical swivel 46 Locknut for vertical swivel 50 Light distribution angle variation mechanism 51 Motor box for lens drive 52 Motor for lens drive 53 Pinion 54 Slider 55 Rack 56 One end of the slider 60 Heat dissipation part 70 Body part 72 Top plate part 74 Peripheral wall part 76 Outer edge part 78 Fixture holding part 80 Torsion coil spring (fixture) 82 Coil part 84 Arm part 90 Mounting auxiliary part 100 Support arm 110 Horizontal rotation part 112 Horizontal rotation shaft 114 Horizontal support arm part 120 First support arm part 122 First extension part 124 Second extension part 126 Third extension part 127 Fourth shaft part 128 Hole 130 Second support arm part 132 First extended part 134 Second extended part 136 Third extended part 138 Hole 200 Appliance mounting frame 210 Appliance mounting hole 220 Fixture engaging part 230 Frame part 232 Cylindrical part 234 Outer edge part 240 Slide fitting 242 Slide part C Cable F Fin FL Lens LS Light source OA Optical axis PS DC power supply device VA Vertical axis

Claims

1. A lighting device comprising a lighting fixture body configured to be attachable to an attachment hole formed on an installation surface, wherein the lighting fixture body includes a light source unit having a light source and a lens provided so as to face the light source, a support arm for supporting the light source unit, a horizontal rotation mechanism for rotating the support arm in a direction horizontal to the installation surface, a vertical swing mechanism for swinging the light source unit along a direction intersecting the installation surface, and a light distribution angle variation mechanism for varying the distance between the light source and the lens of the light source unit ; the support arm has a horizontal rotation part having a horizontal rotation axis for rotating in a direction horizontal to the installation surface, a first support arm part extending from the horizontal rotation part, and a second support arm part extending from the horizontal rotation part and provided opposite to the first support arm part ; the horizontal rotation part is configured to be attachable to the horizontal rotation mechanism, and is configured to swingably support the light source unit between the tip of the first support arm part and the tip of the second support arm part, and the distance in the direction horizontal to the installation surface from the tip of the first support arm part to the extension line of the axis of the horizontal rotation axis of the horizontal rotation part is different from the distance in the direction horizontal to the installation surface from the tip of the second support arm part to the extension line, and the vertical swing mechanism and the light distribution angle variation mechanism are arranged at different positions in the circumferential direction of the light source unit characterizing the lighting device.

2. The vertical swing mechanism and the light distribution angle variation mechanism are arranged opposite to each other in the circumferential direction of the light source unit characterizing the lighting device according to Claim 1.

3. The support arm is configured such that the first support arm part and the second support arm part have different shapes characterizing the lighting device according to Claim 1 or 2.

4. The lighting fixture body further includes a heat dissipation part having a plurality of fins, the horizontal rotation axis of the horizontal rotation part of the support arm is configured in a cylindrical shape through which a cable can be inserted into the horizontal rotation axis, and the heat dissipation part is arranged at the rear of the light source unit and provided with a gap through which the cable can be inserted between the plurality of fins characterizing the lighting device according to any one of Claims 1 to 3.

5. The lighting device further includes a fixture attachment frame that can be fixed to the attachment hole and to which the lighting fixture body can be attached, wherein the lighting fixture body a body part capable of accommodating the light source unit, a fixture for attaching the body part to the fixture mounting frame, and an attachment assisting part are further included, the fixture mounting frame includes a fixture mounting hole through which the lighting fixture main body can be inserted and a fixture engaging part capable of engaging with the fixture, the fixture is configured to be deformable between a deformed state in which it can pass through the fixture mounting hole of the fixture mounting frame and a restored state in which it engages with the fixture engaging part after insertion, the attachment assisting part is configured to be capable of temporarily fixing the fixture before being attached to the fixture engaging part so as to maintain the deformed state, The lighting device according to any one of claims 1 to 4, characterized in that.

6. The fixture is a torsion coil spring The lighting device according to claim 5, characterized in that. ​

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