JP7697669B2 - Lighting equipment - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Published in "HABITATION STRUCTURAL LIGHTING 2021-2022 Vol. 186" published by ODELIC Co., Ltd. on May 31, 2021 Published on ODELIC Co., Ltd.'s website on June 14, 2021

The present invention relates to a lighting device.

There is a downlight-type lighting device that includes an angle adjustment device for adjusting the angle of a light source, which includes a frame body, a horizontal rotation unit supported by the frame body so as to be rotatable in the horizontal direction, a vertical rotation unit supported by the horizontal rotation unit so as to be rotatable in the vertical direction and to which the light source is fixed, a first drive unit that drives the horizontal rotation unit, and a second drive unit that drives the vertical rotation unit, and the first drive unit and the second drive unit are arranged symmetrically with respect to the center line of the light source (for example, Patent Document 1).

Patent No. 6254069

However, in the conventional lighting devices described above, all mechanisms must be built inside a frame that is embedded in an existing embedding hole in an indoor ceiling, and the first drive unit that drives the horizontal rotation unit and the second drive unit that drives the vertical rotation unit are arranged symmetrically with respect to the center line of the light source. This results in a problem that the frame becomes large and the embedding hole for embedding the lighting device cannot be made small.

In addition, in conventional lighting devices, the first drive unit and the second drive unit are arranged on the same circumference inside the frame body, so there is no space to insert a light distribution angle variation mechanism for changing the light distribution angle of the light source, which causes the problem that the lighting device is inferior in functionality to a lighting device equipped with a light distribution angle variation mechanism.

The present invention was developed in consideration of these problems, and aims to provide a lighting device that can be installed in a small diameter mounting hole.

The lighting device according to the present invention is a lighting device comprising a lighting fixture body configured to be mountable in a mounting hole formed on an installation surface, the lighting fixture body including a light source unit having a light source and a lens arranged to face the light source, a support arm supporting the light source unit, a horizontal rotation mechanism for rotating the support arm in a direction horizontal to the installation surface, a vertical rotation mechanism for rotating 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 including a horizontal rotation section having a horizontal rotation axis and a first support arm extending from one end of the horizontal rotation section. The horizontal rotation mechanism has a first support arm and a second support arm extending from the other end of the horizontal rotation mechanism and facing the first support arm. The horizontal rotation mechanism is configured to be attachable to the horizontal rotation mechanism and to rotatably support the light source unit between the first support arm and the second support arm. The distance from the first support arm to the horizontal rotation axis of the horizontal rotation mechanism and the distance from the second support arm to the horizontal rotation axis of the horizontal rotation mechanism are configured to be different lengths. The vertical rotation mechanism and the light distribution angle variation mechanism are arranged at different positions in the circumferential direction of the light source unit.

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

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

In the lighting device according to the present invention, the lighting fixture body further includes a heat dissipation section having a plurality of fins, the horizontal rotation shaft of the horizontal rotation section of the support arm is configured in a cylindrical shape through which a cable can be inserted, the heat dissipation section 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.

The lighting device according to the present invention further comprises a fixture mounting frame that can be fixed to the mounting hole and to which the lighting fixture main body can be attached, the lighting fixture main body further comprises a body portion capable of accommodating the light source unit, a fixture that attaches the body portion to the fixture mounting frame, and a mounting auxiliary portion, the fixture mounting frame includes a fixture mounting hole through which the lighting fixture main body can be inserted and a fixture engagement 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 engagement portion after insertion, and the mounting auxiliary portion may be configured to be temporarily fixed so as to maintain the fixture in the deformed state before it is attached to the fixture engagement portion.

In the lighting device according to the present invention, the fixing device may be a torsion coil spring.

The present invention makes it possible to provide a lighting device that can be installed in a small diameter mounting hole.

FIG. 1 is a schematic diagram showing a lighting fixture body of a lighting device according to an embodiment of the present invention; FIG. 1 is an exploded view showing a lighting device according to an embodiment of the present invention; Assembly diagram of the lighting device according to the present embodiment. 1 is a cross-sectional view of a light source unit according to an embodiment of the present invention; FIG. 1 is an exploded view showing a lighting fixture body according to an embodiment of the present invention; FIG. 1 is a schematic diagram showing a horizontal rotation mechanism according to an embodiment of the present invention; FIG. 1 is a schematic diagram showing a vertical rotation mechanism according to the present embodiment; FIG. 1 is a schematic diagram showing a light distribution angle variation mechanism according to an embodiment of the present invention; FIG. 1 is a schematic diagram showing a support arm according to an embodiment of the present invention; FIG. 1 is a plan view showing a support arm according to an embodiment of the present invention; FIG. 1 is a schematic diagram showing a lighting fixture body according to an embodiment of the present invention; FIG. 1 is a schematic diagram showing a lighting fixture body according to an embodiment of the present invention; FIG. 1 is a schematic diagram showing a heat dissipation unit according to an embodiment of the present invention; FIG. 1 is a diagram showing an installation state of a lighting device according to an embodiment of the present invention; FIG. 3 is a cross-sectional view showing the lighting fixture body according to the embodiment. FIG. 1 shows vertical rotation according to the present embodiment. FIG. 1 shows horizontal rotation and vertical rotation according to the present embodiment.

The best mode for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention. The drawings are schematic diagrams in which emphasis, omissions, and proportions have been appropriately adjusted to illustrate the present invention, and may differ from the actual shapes, positional relationships, and proportions.

[Configuration of the lighting device according to this embodiment]
First, an illumination device 1 according to an embodiment of the present invention will be outlined with reference to Figs. 1 to 3. The illumination device 1 according to the present embodiment is a downlight type illumination device including an illumination device body 10 configured to be mountable to a mounting hole formed on an installation surface, as shown in Fig. 1. The illumination device body 10 includes a light source unit 20, a support arm 100 supporting the light source unit 20, a horizontal rotation mechanism 30 for rotating the support arm 100 in a direction horizontal to the installation surface, a vertical rotation mechanism 40 for rotating the light source unit 20 along a direction intersecting the installation surface, and a light distribution angle variation mechanism 50 for varying the distance between a light source LS and a lens FL of the light source unit 20, which will be described later. The vertical rotation mechanism 40 and the light distribution angle variation mechanism 50 are disposed at different positions in the circumferential direction of the light source unit 20. As shown in Fig. 5, the illumination device body 10 includes a support arm 100 attached to a rear housing 25 of the light source unit 20, which will be described later. The vertical rotation mechanism 40 and the light distribution angle variation mechanism 50 are disposed on the outer side of the support arm 100 so as to face each other in the circumferential direction of the light source unit 20 .

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

In the following description, the light distribution angle varying mechanism 50 side of the lighting fixture body 10 will be described as the right side, and the vertical rotation mechanism 40 side will be described as the left side.
[Configuration of lighting fixture body]
Next, each component of the lighting fixture body 10 will be described in detail.
4, the light source unit 20 has a light source LS and a lens FL provided to face the light source LS. The light source unit 20 further has a front housing 21 made of resin, a rear housing 25 made of aluminum die-cast, and a lens holder 23 attached to the front housing 21, and the front housing 21 is attached coaxially to the rear housing 25.

As shown in FIG. 8, the front housing 21 is formed in a cylindrical shape and has an inner diameter to which the lens holder 23 can be attached. The front housing 21 also has a slider cover 22 on the right periphery that is connected to one end 56 of a slider 54 of a light distribution angle variation mechanism 50 (described later) so as to be movable relative to the slider cover 22. The lens holder 23 is formed in a cylindrical shape that can be fitted into the front housing 21 and has an inner diameter to which the lens FL can be attached. The lens holder 23 also has a slider fixing portion (not shown) to which one end 56 of the slider 54 can be attached.

As shown in FIG. 4, the rear housing 25 has a light source base 26 on the front surface facing the front housing 21, and a heat dissipation unit 60 on the rear surface (see FIG. 13). A light source LS is attached to the light source base 26. The light source LS is a high-brightness light source of 2500 lm class. In this embodiment, the light source LS is a chip-on-board LED (Light Emitting Diode) that can adjust the brightness and color, but is not limited to this and various arbitrary configurations can be adopted.

A first shaft hole (not shown) and a second shaft hole (not shown) for attaching the support arm 100 are formed on the left and right sides of the rear housing 25, respectively. The first shaft hole and the second shaft hole are formed at positions offset by 180° in the circumferential direction of the rear housing 25, and are formed at the center of gravity 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. With this configuration, the light source unit 20 can rotate vertically with the center of gravity as the center of rotation.

As shown in FIG. 4, the light source base 26 is configured to protrude toward the front housing 21 so as to be positioned within the internal space of the front housing 21 when the front housing 21 and the rear housing 25 are connected. With this configuration, the resin front housing 21 is lighter than the aluminum rear housing 25, so the center of gravity of the entire light source unit 20 is not biased toward the rear housing 25.

As shown in Figs. 4 and 8, the lens FL is attached inside the front housing 21 via the lens holder 23 so as to be freely movable along the irradiation axis direction of the light source LS. In this embodiment, the lens FL is a Fresnel lens, but is not limited to this 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 variation mechanism 50. With such a configuration, the light source unit 20 can change the distance between the lens FL and the light source LS and adjust the light distribution angle of the light emitted by the light source LS.

FIG. 6 is a diagram showing a horizontal rotation motor box of the horizontal rotation mechanism with a portion thereof omitted.
As shown in FIG. 6 , the horizontal rotation mechanism 30 has a horizontal rotation motor box 31, a horizontal rotation motor 32 arranged in the horizontal rotation motor box 31, a horizontal rotation worm gear 33 (a horizontal rotation worm 34 and a horizontal rotation worm wheel 35), a bearing (not shown) that rotatably supports the horizontal rotation shaft 112 of the horizontal rotation section 110 of the support arm 100 described later, a horizontal rotation wave washer (not shown), a horizontal rotation anti-loosening nut 37 attached to the tip of the horizontal rotation shaft 112, an encoder mounting arm 38, and a horizontal rotation encoder (not shown).

The horizontal rotation motor box 31 has a hole (not shown) at the bottom through which the horizontal rotation shaft 112 can be inserted. The horizontal rotation motor box 31 is also configured so that the bottom can be attached to the body 70.

The horizontal rotation worm 34 is attached to the horizontal rotation motor 32 and is configured to transmit the rotation of the horizontal rotation motor 32 to the horizontal rotation worm wheel 35. The horizontal rotation worm wheel 35, the bearing, the horizontal rotation wave washer, and the horizontal rotation locking nut 37 have an inner diameter that allows the horizontal rotation shaft 112 to be inserted, and are inserted into the horizontal rotation shaft 112 in the order of the bearing, the horizontal rotation worm wheel 35, the horizontal rotation wave washer, and the horizontal rotation locking nut 37. As a result, the horizontal rotation locking nut 37 is fixed to the horizontal rotation shaft 112, and the horizontal rotation worm wheel 35 and the horizontal rotation locking nut 37 are engaged via the horizontal rotation wave washer. With this configuration, the horizontal rotation shaft 112 is rotatably supported, and the rotation of the horizontal rotation motor 32 can be transmitted to the horizontal rotation shaft 112 via the horizontal rotation worm gear 33 and the horizontal rotation locking nut 37. In addition, because the horizontal rotation worm wheel 35 and the horizontal rotation locking nut 37 are engaged via a horizontal rotation wave washer, when a strong external force is applied to the horizontal rotation shaft 112, the horizontal rotation worm wheel 35 will spin freely, preventing damage to the horizontal rotation mechanism 30.

The horizontal rotation locking nut 37 is also provided integrally with an encoder mounting arm 38. The encoder mounting arm 38 rises upward from the horizontal rotation locking nut 37 and is bent at multiple points, with its tip positioned above the rotation axis of the horizontal rotation shaft 112, the horizontal rotation worm wheel 35, and the horizontal rotation locking nut 37. A horizontal rotation encoder is attached to the tip of the encoder mounting arm 38 to detect the horizontal rotation angle of the horizontal rotation shaft 112, the support arm 100, and the light source unit 20. The horizontal rotation encoder can have a variety of known configurations, so a detailed description thereof will be omitted.

The horizontal rotation mechanism 30 has such a configuration that the driving force of the horizontal rotation motor 32 is transmitted to the horizontal rotation shaft 112 via the horizontal rotation worm gear 33, allowing the support arm 100 and the light source unit 20 to rotate horizontally relative to the installation surface.

FIG. 7 is a diagram showing a vertical rotation motor box of the vertical rotation mechanism with a portion thereof omitted.
As shown in FIG. 7 , the vertical rotation mechanism 40 has a vertical rotation motor box 41, a vertical rotation motor 42 arranged in 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 anti-loosening 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).

The vertical rotation motor box 41 is configured to be mountable to the left side of the rear housing 25 of the light source unit 20, and the surface to which it is mounted to the rear housing 25 is provided with a hole (not shown) through which the fourth shaft 127 of the first support arm 120 can be inserted. In addition, the vertical rotation motor box 41 has a base (not shown) provided on an extension line of the fourth shaft 127 of the first support arm 120.

A vertical rotation encoder is attached to the base to detect the vertical rotation angle of the fourth shaft 127 of the first support arm 120 and thus the light source unit 20. The vertical rotation encoder can have a variety of known configurations, so a detailed description of it will be omitted.

The vertical rotation worm 44 is attached to the vertical rotation motor 42 and is configured to transmit the rotation of the vertical rotation motor 42 to the vertical rotation worm wheel 45. The vertical rotation worm wheel 45, the vertical rotation wave washer, and the vertical rotation locking nut 46 have an inner diameter that allows the fourth shaft portion 127 of the first support arm portion 120 to be inserted therethrough, and are inserted into the fourth shaft portion 127 of the first support arm portion 120 in the order of the vertical rotation worm wheel 45, the vertical rotation wave washer, and the vertical rotation locking nut 46. As a result, the vertical rotation locking nut 46 is fixed to the fourth shaft portion 127 of the first support arm portion 120, and the vertical rotation worm wheel 45 and the vertical rotation locking nut 46 are engaged via the vertical rotation wave washer. With this configuration, the fourth shaft 127 of the first support arm 120 is rotatably supported, and the rotation of the vertical rotation motor 42 can be transmitted to the fourth shaft 127 of the first support arm 120 via the vertical rotation worm gear 43 and the vertical rotation locking nut 46. In addition, since the vertical rotation worm wheel 45 and the vertical rotation locking nut 46 are engaged via the vertical rotation wave washer, when a strong external force is applied to the fourth shaft 127 of the first support arm 120, the vertical rotation worm wheel 45 spins freely, which prevents the vertical rotation mechanism 40 from being damaged.

By having such a configuration, the vertical rotation mechanism 40 is configured to transmit the driving force of the vertical rotation motor 42 to the fourth shaft portion 127 of the first support arm portion 120 via the vertical rotation worm gear 43, thereby allowing the light source unit 20 to rotate in a direction intersecting the installation surface.

FIG. 8 is a diagram in which a part of a lens driving motor box of the light distribution angle variation mechanism is omitted.
8 , the light distribution angle variation mechanism 50 has a lens drive motor box 51, a lens drive motor 52 arranged in 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 translational motion, and a lens drive encoder (not shown). The lens drive motor box 51 is configured to be attachable to the right side of the rear housing 25 of the light source unit 20, and is arranged so as to avoid a second shaft hole provided in the rear housing 25 and so that each component of the light distribution angle variation mechanism 50 is located inside a second support arm portion 130 (described later) of the support arm 100.

The lens drive motor box 51 is also fitted with a lens drive encoder that detects the amount of rotation of the lens drive motor 52 and thus the amount of movement of the lens FL of the light source unit 20. The lens drive encoder can have a variety of known configurations, so a detailed description of it will be omitted.

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

[Support arm configuration]
Next, each component of the support arm 100 will be described in detail.
As shown in Fig. 5 and Fig. 9, the support arm 100 has a horizontal rotation part 110 having a horizontal rotation shaft 112, a first support arm part 120 extending from one end of the horizontal rotation part 110, and a second support arm part 130 extending from the other end of the horizontal rotation part 110 and provided opposite 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. In addition, as shown in Fig. 10, the distance from the first support arm part 120 to the horizontal rotation shaft 112 of the horizontal rotation part 110 and the distance from the second support arm part 130 to the horizontal rotation shaft 112 of the horizontal rotation part 110 are configured to be different lengths.

9, the horizontal rotation unit 110 has a horizontal rotation shaft 112 and a horizontal support arm 114 extending radially from the lower end of the horizontal rotation shaft 112. The horizontal rotation shaft 112 is configured in a cylindrical shape that allows a cable C to be inserted into the horizontal rotation shaft 112. As shown in FIG. 10, the horizontal support arm 114 has different lengths extending from the horizontal rotation shaft 112 on the left and right sides, with the second support arm 130 side (right side) being longer. The horizontal rotation unit 110 having such a configuration is configured to be attached to the horizontal rotation mechanism 30 by inserting the horizontal rotation shaft 112 into a hole provided in the horizontal rotation motor box 31 of the horizontal rotation mechanism 30.

As shown in Figures 9 and 10, the first support arm portion 120 has a first extension portion 122 extending circumferentially from one end of the horizontal support arm portion 114 so as to be perpendicular to the horizontal support arm portion 114, a second extension portion 124 extending vertically from the first extension portion 122, a third extension portion 126 extending from the second extension portion 124 toward the axis of the first axis hole of the rear housing 25 of the light source unit 20, a fourth axis portion 127 which is the tip of the third extension portion 126 and extends outward from the axis of the first axis hole, and a hole 128 provided in the fourth axis portion 127.

As shown in Fig. 9 and Fig. 10, the second support arm 130 has a first extension 132 extending from the other end of the horizontal support arm 114 in the circumferential direction so as to be perpendicular to the horizontal support arm 114, a second extension 134 extending vertically from the first extension 132, a third extension 136 extending from the second extension 134 toward the axis of the second axial hole of the rear housing 25 of the light source unit 20, and a hole 138 at the tip of the third extension 136, which is provided on the axis of the second axial hole. The tip of the first extension 132 is chamfered to follow the arc of the mounting hole. With this configuration, the support arm 100 can rotate horizontally without interfering with the mounting hole.

In the support arm 100 having such a configuration, the first support arm section 120 and the second support arm section 130 are configured to have different shapes. Specifically, the first extension section 122 of the first support arm section 120 and the first extension section 132 of the second support arm section 130 have different lengths, and the first extension section 122 of the first support arm section 120 is longer than the first extension section 132 of the second support arm section 130. In addition, the second extension section 124 of the first support arm section 120 and the second extension section 134 of the second support arm section 130 have different lengths, and the second extension section 134 of the second support arm section 130 is longer than the second extension section 124 of the first support arm section 120. Furthermore, the third extension 126 of the first support arm section 120 and the third extension 136 of the second support arm section 130 have different lengths, with the third extension 126 of the first support arm section 120 being longer than the third extension 136 of the second support arm section 130. Also, the length from one end of the horizontal support arm section 114 of the horizontal rotation section 110 to the tip of the first extension section of the first support arm section 120, and the length from the other end of the horizontal support arm section 114 to the tip of the first extension section 132 of the second support arm section 130 are each shorter than the radius of the body section 70.

Furthermore, the angle between the second extension portion 124 and the third extension portion 126 of the first support arm portion 120 and the angle between the second extension portion 134 and the third extension portion 136 of the second support arm portion 130 are configured to be different angles. Specifically, the angle between the second extension portion 124 and the third extension portion 126 of the first support arm portion 120 is configured to be an angle such that 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 when the light source unit 20 is rotated vertically to its maximum, as shown in FIG. In addition, the angle between the second extension 134 and the third extension 136 of the second support arm 130 is configured so that the second extension 134 and the third extension 136 do not interfere with the lens drive motor box 51 of the light distribution angle variation mechanism 50 when the light source unit 20 is rotated vertically to its maximum, as shown in FIG. 12.

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

By having the above-mentioned configuration, the support arm 100 can keep the overall width of the lighting fixture body 10 short even if the vertical rotation mechanism 40 is placed on the outside of the first support arm section 120 and the light distribution angle variation mechanism 50 is placed on the inside of the second support arm section 130.

The heat dissipation section 60 has a plurality of fins F, as shown in FIG. 13. The heat dissipation section 60 is disposed at the rear of the light source unit 20, and a gap is provided between the plurality of fins F through which the cable C can be inserted. This gap is configured to serve as a cable guide. The plurality of fins F are disposed asymmetrically on the left and right sides of the gap. Specifically, the plurality of fins F are provided in greater numbers on the right side of the light source unit 20 (the second support arm section 130 side of the support arm 100), and are configured with a shape and arrangement that do not interfere with the support arm 100, the vertical rotation mechanism 40, and the light distribution angle variation mechanism 50. By being configured in this way, the heat dissipation section 60 can dissipate heat generated by the high-brightness light source LS of the 2500 lm class of the light source unit 20 with high heat dissipation efficiency.

As shown in FIG. 2, the body 70 has a circular top plate 72, a peripheral wall 74 extending vertically from the periphery of the top plate 72, an outer edge 76 extending circumferentially outward from the tip of the peripheral wall 74, and a fixture holder 78 disposed on the outside of the peripheral wall 74. The top plate 72 has a hole (not shown) through which the horizontal rotation shaft 112 of the horizontal rotation part 110 of the support arm 100 can be inserted, and is configured so that the horizontal rotation mechanism 30 can be attached to the upper surface.

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

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

As shown in Figures 2 and 3, the attachment auxiliary part 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 fasten the torsion coil spring 80 so as to maintain the deformed state before it is attached to the fixture engagement part 220. Specifically, the attachment auxiliary part 90 has a claw part onto which the tip of the arm part 84 of the torsion coil spring 80 can be hooked, and by hooking the tip of the arm part 84 of the torsion coil spring 80 in a deformed state onto the claw part, the fixture 80 is temporarily fastened in a deformed state by the restoring force of the spring.

The lighting fixture body 10 having the above configuration is configured so that it can be installed in a small diameter mounting hole of 175 mm or less, specifically a mounting hole of 150 mm in diameter, formed on the installation surface via the fixture mounting frame 200.

[Configuration of fixture mounting frame]
The fixture mounting frame 200 is a fixture to be installed on an installation surface having a mounting hole, such as a ceiling, as shown in Fig. 14. The fixture mounting frame 200 includes a fixture mounting hole 210 through which the lighting fixture body 10 can be inserted, and a fixture engagement portion 220 that can engage with the fixture 80, as shown in Fig. 2.

Specifically, as shown in FIG. 2, the fixture mounting frame 200 has a frame portion 230 having a cylindrical portion 232 and an outer edge portion 234 extending circumferentially outward from one end of the cylindrical portion 232, a plurality of (two in this embodiment) fastener engagement portions 220 provided opposite each other in the circumferential direction of the cylindrical portion 232, and a plurality of (three in this embodiment) slide fittings 240 provided between the fastener engagement 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 engagement portions 220 and the slide fittings 240 are not limited to a configuration in which multiple fastener engagement portions 220 and slide fittings 240 are provided, and may be provided in only one location.

The fixing device engagement portion 220 has a claw on the back surface (the inner circumferential surface of the frame portion 230) on which the arm portion 84 of the torsion coil spring 80 can be hooked. The frame portion 230 is formed so 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 that the frame portion 230 can be attached to a mounting hole having a diameter of 150 mm. The slide fitting 240 is configured so that the tip of the slide portion 242 is formed in a hook claw shape and the tip of the slide portion 242 engages with the installation surface.

The fixture mounting frame 200 has such a configuration that the lighting fixture body 10 can be attached to the inside of the frame portion 230, and the sliding portion 242 of the sliding bracket 240 is hooked onto the installation surface, so that the lighting fixture body 10 can be fixed to the mounting hole of the installation surface.

The DC power supply PS converts AC voltage supplied from indoor wiring, etc., into DC voltage, and supplies the DC voltage converted to an appropriate voltage value to the light source unit 20, horizontal rotation mechanism 30, vertical rotation mechanism 40, and light distribution angle variation mechanism 50 of the lighting fixture body 10.

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

[Installation method of lighting device according to this embodiment]
Next, a method for installing the lighting device 1 will be generally described.
In the lighting device 1, first, the fixture mounting frame 200 is fixed to a mounting hole provided on the installation surface. Specifically, the fixture mounting frame 200 is inserted into the mounting hole with the slide portion 242 of the slide fitting 240 folded. Thereafter, the slide portion 242 is slid downward on the slide fitting 240, thereby opening the slide portion 242 and engaging the tip portion of the slide portion 242 with the inner surface of the installation surface. As a result, the installation surface is clamped between the slide portion 242 and the outer edge portion 234, and the fixture mounting frame 200 is fixed to the installation surface.

Next, the DC power supply PS, which is connected to the lighting fixture body 10 by a cable C, is inserted through the fixture mounting hole 210 of the fixture mounting frame 200 into the inside of the installation surface and attached to the inner surface of the installation surface. The lighting fixture body 10 is inserted through the fixture mounting hole 210 with the torsion coil spring 80 on the left side (vertical rotation mechanism 40 side) temporarily fixed in a deformed state to the mounting auxiliary part 90 and the torsion coil spring 80 on the right side (light distribution angle variation mechanism 50 side) held in a deformed state by the user.

After being inserted into the fixture mounting hole 210, first, the arm 84 of the right torsion coil spring 80 is hooked onto one of the fixture engagement parts 220 of the fixture mounting frame 200. Furthermore, the arm 84 of the left torsion coil spring 80, which has been temporarily fixed, is hooked onto the other fixture engagement part 220. As shown in FIG. 14, the left and right torsion coil springs 80 engage with the fixture engagement parts 220 of the fixture mounting frame 200, and the lighting fixture body 10 is fixed to the mounting hole on the installation surface. Through the above steps, the lighting device 1 according to this embodiment is installed.

[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.
As shown in Figures 16 and 17, in the lighting fixture body 10 of 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 relative 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 a direction intersecting the installation surface.

Specifically, the light source unit 20 can rotate along a direction intersecting the installation surface until the angle θ between the vertical central axis (vertical axis) VA of the lighting device body 10 and the optical axis OA of the light source LS of the light source unit 20 is a maximum of 40°, and can rotate horizontally up to 180° left and right. In other words, by combining these movements, the lighting device body 10 can swivel up to a maximum range of 80° vertically and 360° horizontally.

In addition, in the lighting fixture body 10 according to this embodiment, the distance between the lens FL of the light source unit 20 and the light source LS changes as the lens drive motor 52 of the light distribution angle variation mechanism 50 rotates, thereby varying the light distribution angle.

[Method of controlling the lighting fixture body according to the present embodiment]
The control system of the lighting fixture body 10 according to this embodiment is concentrated in the DC power supply PS. The DC power supply PS has 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 control for remote operation, a smartphone, a tablet terminal, or the like. When multiple lighting devices 1 are installed, wireless communication is possible between the communication modules of the DC power supply PS of each lighting device 1, and thus a mesh-type network capable of two-way wireless communication between multiple lighting devices 1 can be constructed.

The main control unit transmits and receives information to and from the communication module, and performs overall control of the lighting fixture body 10. The memory unit stores information sent from the communication module via the main control unit, and also stores various programs required to operate the lighting fixture body 10.

The main control unit also has 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 a posture control unit (not shown) that controls each of the motors 32, 42, and 52 of the lighting fixture body 10. The light source control unit controls the on/off, dimming, and color adjustment of the light source LS.

The attitude control unit controls the motors 32, 42, and 52 to control the horizontal rotation operation, vertical rotation operation, and light distribution 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 controlling the drive of the horizontal rotation motor 32 of the horizontal rotation mechanism 30, controls the vertical rotation operation of the light source unit 20 by controlling the drive of the vertical rotation motor 42 of the vertical rotation mechanism 40, and controls the light distribution angle by controlling the drive of the lens drive motor 52 of the light distribution angle variation mechanism 50.

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

[Advantages of the lighting device according to this embodiment]
As described above, the lighting device 1 according to this embodiment is a lighting device including a lighting fixture body 10 configured to be mountable in a mounting hole formed on an installation surface, and the lighting fixture body 10 includes a light source unit 20 having a light source LS and a lens FL provided to face the light source LS, a support arm 100 supporting 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 rotation 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 includes a horizontal rotation section 110 having a horizontal rotation shaft 112 and a vertical rotation mechanism 40 that rotates the light source unit 20 along a direction intersecting the installation surface. The horizontal rotation unit 110 has a first support arm portion 120 extending from the horizontal rotation unit 110, and a second support arm portion 130 extending from the other end of the horizontal rotation unit 110 and arranged opposite the first support arm portion 120. The horizontal rotation unit 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 unit 110 and the distance from the second support arm portion 130 to the horizontal rotation axis 112 of the horizontal rotation unit 110 are configured to be different lengths, and the vertical rotation 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.

The lighting device 1 according to this embodiment has such a configuration, which allows it to be miniaturized and can be installed in a small mounting hole with a diameter of 175 mm or less, specifically a mounting hole with a diameter of 150 mm, formed on the installation surface, and has the advantage that it can be swiveled and the light distribution angle can be changed within the mounting hole.

In addition, in the lighting device 1 according to this embodiment, the vertical rotation mechanism 40 and the light distribution angle variation mechanism 50 are arranged opposite each other in the circumferential direction of the light source unit 20. With this configuration, it is possible to move the center of gravity of the lighting fixture body 10 closer to the vertical rotation axis of the light source unit 20, which has the advantage that a small motor with reduced driving force can be used for the vertical rotation motor 42.

Furthermore, in the lighting device 1 according to this embodiment, the support arm 100 is configured such that the first support arm section 120 and the second support arm section 130 have different shapes. This configuration has the advantage that the lighting fixture body 10 can be made smaller by making the first support arm section 120 and the second support arm section 130 shaped to match the movable ranges of the vertical rotation mechanism 40 and the light distribution angle variation mechanism 50, respectively.

Furthermore, in the lighting device 1 according to this embodiment, the lighting fixture body 10 further includes a heat dissipation section 60 having a plurality of fins F, and the horizontal rotation shaft 112 of the horizontal rotation section 110 of the support arm 100 is configured in a cylindrical shape so that the cable C can be inserted into the horizontal rotation shaft 112, and the heat dissipation section 60 is disposed at the rear of the light source unit 20, and a gap is provided between the plurality of fins F so that the cable C can be inserted therein. With this configuration, when the light source unit 20 is rotated vertically, the bent cable C fits into the gap, which has the advantage that the overall length of the lighting fixture body 10 can be shortened and twisting of the cable C can be suppressed.

The lighting device 1 according to this embodiment further includes a fixture mounting frame 200 that can be fixed to a mounting hole and can mount the lighting fixture main body 10. 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 a mounting 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 engagement 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 engagement portion 220 after insertion. The mounting auxiliary portion 90 is configured to be temporarily fixed so as to maintain the fixture 80 in a deformed state before being attached to the fixture engagement portion 220. By providing such a configuration, it has the advantage that vibration during the swing operation can be suppressed compared to when the lighting fixture main body 10 is directly fixed to the mounting hole with a leaf spring or the like. Another advantage is that it is easier to install in small diameter mounting holes.

Furthermore, in the lighting device 1 according to this embodiment, the fixing device 80 is a torsion coil spring. With this configuration, the lighting fixture body 10 and the fixture mounting frame 200 can be fixed with a small engagement portion, which has the advantage that the lighting fixture body 10 and the fixture mounting frame 200 can be made smaller.

In addition, by being configured as described above, the lighting device 1 according to this embodiment has the advantage that the volume of the housing can be made the minimum volume possible to accommodate a high-brightness LED light source LS of 2500lm class, a heat dissipation section 60 that dissipates heat from the light source LS, and three motors, a horizontal rotation motor 32, a vertical rotation motor 42, and a lens drive motor 52, while still allowing vertical rotation of up to 40° within a mounting hole with a diameter of 150 mm.

Furthermore, the lighting device 1 according to this embodiment is configured to be mountable in a mounting hole with a diameter of 150 mm, which allows the mounting hole to be made smaller on the installation surface compared to conventional lighting devices that are mounted in mounting holes with a diameter of 175 mm. This allows the lighting device 1 to realize a smaller mounting hole that meets the needs of today's housing conditions, where high airtight construction and insulation are important, and has the advantage of being able to be installed without compromising the airtightness of the home.

[Modification]
Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above-mentioned embodiments. Various modifications and improvements can be made to the above-mentioned embodiments.

For example, in the above-described embodiment, the vertical rotation mechanism 40 and the light distribution angle variation mechanism 50 are described as being arranged opposite each other in the circumferential direction of the light source unit 20, but this is not limited thereto, and they do not have to be arranged opposite each other in the circumferential direction.

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 to have different shapes, but this is not limited thereto, and the first support arm portion 120 and the second support arm portion 130 may be configured to have the same shape.

In the above-described embodiment, the lighting device body 10 further includes a heat dissipation section 60 having a plurality of fins F, the horizontal rotation shaft 112 of the horizontal rotation section 110 of the support arm 100 is configured as a cylinder into which the cable C can be inserted, and the heat dissipation section 60 is disposed at the rear of the light source unit 20 and has a gap between the plurality of fins F into which the cable C can be inserted. However, this is not limited to the above. The lighting device body 10 does not need to include the heat dissipation section 60, and the horizontal rotation shaft 112 of the horizontal rotation section 110 of the support arm 100 may be a solid shaft.

In the above-described embodiment, the lighting device 1 further includes a fixture mounting frame 200 that can be fixed to a mounting hole and can mount the lighting fixture main body 10, and the lighting fixture main body 10 further includes a body portion 70 that can accommodate the light source unit 20, a fixing device 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 main body 10 can be inserted and a fixing device engagement portion 220 that can engage with the fixing device 80. The fixing device 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 fixing device engagement portion 220 after insertion. The mounting auxiliary portion 90 has been described as being configured to be temporarily fixed so as to maintain the fixing device 80 in a deformed state before being attached to the fixing device engagement portion 220, but is not limited thereto. The lighting device 1 can adopt various arbitrary configurations as long as it is configured to be able to fix the lighting fixture main body 10 to the mounting hole. For example, the lighting fixture body 10 may be configured to be fixed directly to the mounting hole.

In the above embodiment, the fixing device 80 is described as a torsion coil spring, but is not limited to this and may be a leaf spring, etc.

In the above embodiment, the light source unit 20 is described on the assumption that it has one lens FL, but this is not limited thereto, and the light source unit 20 may have multiple lenses.

In the above-described embodiment, the installation surface is described as being the ceiling of a building, but this is not limited thereto, and the installation surface may be the floor or wall surface of a building, etc.

LIST OF SYMBOLS 1 Illumination device 10 Illumination fixture body 20 Light source unit 21 Front housing 22 Slider cover 23 Lens holder 25 Rear housing 26 Light source base 30 Horizontal rotation mechanism 31 Horizontal rotation motor box 32 Horizontal rotation motor 33 Horizontal rotation worm gear 34 Horizontal rotation worm 35 Horizontal rotation worm wheel 37 Horizontal rotation anti-loosening nut 38 Encoder mounting arm 40 Vertical rotation mechanism 41 Vertical rotation motor box 42 Vertical rotation motor 43 Vertical rotation worm gear 44 Vertical rotation worm 45 Vertical rotation worm wheel 46 Vertical rotation anti-loosening nut 50 Light distribution angle variation mechanism 51 Lens drive motor box 52 Lens drive motor 53 Pinion 54 Slider 55 Rack 56 One end of slider 60 heat dissipation portion 70 body portion 72 top plate portion 74 peripheral wall portion 76 outer edge portion 78 fixture holding portion 80 torsion coil spring (fixture)
Description of the Reference Signs 82 Coil portion 84 Arm portion 90 Mounting auxiliary portion 100 Support arm 110 Horizontal rotation portion 112 Horizontal rotation axis 114 Horizontal support arm portion 120 First support arm portion 122 First extension portion 124 Second extension portion 126 Third extension portion 127 Fourth axis portion 128 Hole 130 Second support arm portion 132 First extension portion 134 Second extension portion 136 Third extension portion 138 Hole 200 Equipment mounting frame 210 Equipment mounting hole 220 Fixture engagement portion 230 Frame portion 232 Cylindrical portion 234 Outer edge portion 240 Slide fitting 242 Slide portion C Cable F Fin FL Lens LS Light source OA Optical axis PS DC power supply unit VA Vertical axis

Claims (6)

A lighting device including a lighting fixture body configured to be mountable to a mounting hole formed on an installation surface,
The lighting fixture body includes:
a light source unit having a light source and a lens provided to face the light source;
A support arm for supporting the light source unit;
a horizontal rotation mechanism that rotates the support arm in a direction horizontal to the installation surface;
a vertical rotation mechanism that rotates the light source unit along a direction intersecting the installation surface;
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 includes:
a horizontal rotation unit having a horizontal rotation shaft for rotating the device in a direction parallel to the installation surface ;
A first support arm portion extending from the horizontal rotation portion ;
a second support arm portion extending from the horizontal rotation portion and facing the first support arm portion,
The horizontal rotation unit is configured to be attachable to the horizontal rotation mechanism,
The light source unit is configured to be rotatably supported between a tip end of the first support arm portion and a tip end of the second support arm portion,
a distance from the tip of the first support arm to an extension line of an axis of the horizontal rotation shaft of the horizontal rotation part in a direction horizontal to the installation surface and a distance from the tip of the second support arm to the extension line in a direction horizontal to the installation surface are configured to be different lengths,
The lighting device, wherein the vertical rotation mechanism and the light distribution angle variation mechanism are disposed at different positions in a circumferential direction of the light source unit. The lighting device according to claim 1 , wherein the vertical rotation mechanism and the light distribution angle variation mechanism are disposed opposite to each other in a circumferential direction of the light source unit. The lighting device according to claim 1 , wherein the first support arm portion and the second support arm portion of the support arm are configured to have different shapes. The lighting fixture body further includes a heat dissipation portion having a plurality of fins,
the horizontal rotation shaft of the horizontal rotation part of the support arm is configured in a cylindrical shape so that a cable can be inserted into the horizontal rotation shaft,
The lighting device according to any one of claims 1 to 3, characterized in that the heat dissipation portion is arranged at the rear of the light source unit, and a gap is provided between the multiple fins through which the cable can be inserted. The lighting fixture further includes a fixture mounting frame that can be fixed to the mounting hole and to which the lighting fixture body can be attached,
The lighting fixture body includes:
A body portion capable of accommodating the light source unit;
A fixture for attaching the body portion to the instrument mounting frame;
and a mounting assistant part;
The fixture mounting frame includes a fixture mounting hole through which the lighting fixture 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 the fixture can pass through the fixture mounting hole of the fixture mounting frame and a restored state in which the fixture engages with the fixture engaging portion after insertion,
The lighting device according to any one of claims 1 to 4, characterized in that the mounting auxiliary portion is configured to be temporarily fixed so as to maintain the fastener in the deformed state before being attached to the fastener engagement portion. The lighting device according to claim 5 , wherein the fixing device is a torsion coil spring.

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