Lighting device

Abstract

To improve heat dissipation performance. [Solution] The lighting device comprises a base 20 connected to a wiring device via a support 23, an arm 15 attached to the base, and a light body 10 rotatably attached to the arm. The light body 10 includes a light source 132, a motor 17 for rotating the light body relative to the arm, a housing 11 with openings at both ends that connect the internal space to the outside and house the light source 132 and motor 17 in the space, and a cover 14 that covers the opening at one end. The housing has an opening on its side, a side opening 112 through which the arm can pass when the light body rotates relative to the arm.

Description

Technical Field

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

Background Art

[0002] Conventionally, there has been disclosed a lighting device including a drive device that includes a support portion containing an electric first drive source, an arm portion having one end in an extending direction supported by the support portion and being rotatable about a first rotation axis along the extending direction by the first drive source, the arm portion containing an electric second drive source, and a reinforcing portion disposed inside the arm portion to reinforce the arm portion, wherein an operation target is attached to the other end side of the arm portion and is rotatable about a second rotation axis intersecting the extending direction by the second drive source (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] Incidentally, in lighting devices, LEDs (Light Emitting Diodes) used as light sources generate heat when emitting light.

[0005] However, for lighting devices equipped with a drive device, thermal design is required to be performed so as not to exceed the upper limit of allowable temperature of motors or other electronic components used in the drive sources, or optical elements such as lenses. For this reason, it is necessary for lighting devices to dissipate the heat generated by the light source to the outside.

[0006] The present invention is made to address the above-mentioned problem as an example, and an object thereof is to provide a lighting device capable of improving heat dissipation performance.

Means for Solving the Problem

[0007] To achieve the above objective, the lighting device according to the present invention comprises a base connected to a wiring device via a support, an arm attached to the base, and a lamp body rotatably attached to the arm, wherein the base has a housing and electronic components housed in the housing, the lamp body has a light source, a motor for rotating the lamp body relative to the arm, a housing having openings at both ends that connect the internal space to the outside and house the light source and the motor in the space, and a cover covering the opening at one end, the housing having an opening on its side, and the side opening through which the arm can pass when the lamp body rotates relative to the arm. [Effects of the Invention]

[0008] According to the lighting device of the present invention, heat dissipation performance can be improved. [Brief explanation of the drawing]

[0009] [Figure 1] This figure shows an example of the configuration of a lighting device according to an embodiment. [Figure 2] This figure shows the state in which the lamp body and base of the lighting device according to the embodiment are in a straight line. [Figure 3] This figure shows the state in which the lamp body and base of the lighting device according to the embodiment are at a certain angle. [Figure 4] This figure shows the state in which the lamp body and base of the lighting device according to the embodiment are at a right angle. [Figure 5] This figure shows the lighting device according to the embodiment with the housing and cover of the light unit omitted. [Figure 6] This diagram shows the light fixture with its housing and cover omitted, while the light fixture and its base are at a certain angle. [Figure 7] This is a perspective view from the cover side showing the state in which the light body and base of the lighting device according to the embodiment are at a certain angle. [Figure 8]This is a side view showing the state in which the lamp body and base of the lighting device according to the embodiment are at a certain angle. [Figure 9] This is a side view showing the state in which the light body and base of the lighting device according to the embodiment are in a straight line. [Modes for carrying out the invention]

[0010] Specific examples of embodiments of the present invention will be described below with reference to the drawings. In the following description, common components in each embodiment will be denoted by the same reference numerals, and repeated explanations will be omitted. It should also be noted that the drawings are schematic, and the dimensional relationships and ratios of each element may differ from reality. There may also be parts where the dimensional relationships and ratios differ between drawings.

[0011] <<Lighting System Configuration>> Figure 1 shows an example of the configuration of a lighting device according to an embodiment. Figure 2 shows a state in which the lamp body and base of the lighting device according to the embodiment are in a straight line. Figure 3 shows a state in which the lamp body and base of the lighting device according to the embodiment are at a certain angle. Figure 4 shows the state in which the lamp body and base of the lighting device according to the embodiment are at a right angle. Figure 5 shows the lighting device according to the embodiment with the housing and cover of the light unit omitted. Figure 6 shows a state in which the housing and cover of the light fixture are omitted, with the light fixture and base having a certain angle.

[0012] First, the configuration of the lighting device 100 according to this embodiment will be described. The lighting device 100 shown in Figures 1 to 6 is, for example, a device connected to a duct rail mounted on the ceiling of a building, which illuminates a specific area of ​​the building. The lighting device 100 comprises a base 20 and a lamp body 10. Specifically, the lighting device 100 is connected to a duct rail via a support 23 attached to a base 20. The lighting device 100 irradiates a specific area of a building with light output from a light source unit 13 included in a lamp unit 10.

[0013] Note that, as shown in FIG. 2 to FIG. 4, an axis passing through the center of the opening surface of the housing 21 of the base 20 is defined as axis X, and an axis passing through the center of the opening surface of the housing 11 of the lamp unit 10 is defined as axis Y. Further, as shown in FIG. 2 to FIG. 4, the direction along the axis Y is defined as axial direction UD, and in the axial direction UD, the side approaching the base 20 is defined as upper U side, and the side moving away from the base 20 is defined as lower D side. Further, the direction perpendicular to the axis Y is defined as direction CO perpendicular to the axis Y, and in the direction CO perpendicular to the axis Y (hereinafter also referred to as "radial direction CO"), the side approaching the axis Y is defined as center C side, and the side moving away from the axis Y is defined as outer O side. The upper U side, lower D side, center C side, and outer O side are also applied to the axis X.

[0014] The base 20 is connected to a duct rail (not shown) via the support 23, and receives power from a wiring fixture (not shown) provided on the duct rail. In addition, the base 20 accommodates a motor as a drive source therein, and can rotate around the axis X. That is, the base 20 can perform a pan operation by the motor. Further, the base 20 is connected to the lamp unit 10 via an arm unit 15. The base 20 has a housing 21, a top plate 22, a support 23, and a bottom plate 24.

[0015] The housing 21 is a cylindrical metal member. The housing 21 accommodates an electronic circuit (not shown) and the motor described above inside. In the present embodiment, the housing 21 is a cylinder, but the shape of the housing 21 is not limited to this, and may be a rectangular tube.

[0016] The top plate 22 is a disk-shaped member attached to the opening on the upper U side of the housing 21. A support bracket 23 is attached to the top plate 22 on the upper U side. The support member 23 is a component for connecting the lighting device 100 (base 20) to the duct rail. The support member 23 has a central hook portion 231 and side hook portions 232.

[0017] The central hook portion 231 is attached to the center of the top plate 22. The central hook portion 231 can connect the lighting device 100 to the duct rail by rotating the base portion 20 about axis X. The central hook portion 231 is equipped with a conductive terminal and can receive power by contacting the conductive part of the duct rail.

[0018] The side hook portion 232 is attached across the housing 21 and the top plate 22. The side hook portion 232, together with the central hook portion 231, is a component for connecting the base portion 20 and the duct rail. In other words, the side hook portion 232 can reinforce the connection between the base portion 20 and the duct rail by the central hook portion 231 by hooking the claw-shaped member onto the lower surface D of the duct rail.

[0019] The bottom plate 24 is a disc-shaped member that is attached to the opening on the lower D side of the housing 21. An arm section 15 is attached to the base plate 24.

[0020] The lighting unit 10 is connected to the base unit 20 via an arm unit 15 it has, and illuminates a specific area of ​​the building with light emitted from the light source unit 13 it has inside. Furthermore, the light unit 10 is rotatable around an axis perpendicular to the axis X along the axial direction of the base unit 20 by a motor 17 housed inside as a drive source. In other words, the light unit 10 can perform a tilt operation around an axis perpendicular to the axis X of the base unit 20 by the motor 17. The light fixture unit 10 includes a housing 11, an optical element 12, a light source unit 13, a cover 14, an arm unit 15, a base unit 16, a motor 17, and an electronic circuit 18.

[0021] The housing 11 is a metal component formed in the shape of a cylinder. The housing 11 has a cylindrical portion 111 and a notched portion 112. In this embodiment, the housing 11 is a cylinder having openings at one end (upper U side) and the other end (lower D side) and having space inside. However, the shape of the housing 11 is not limited to this, and other shapes such as a rectangular tube may be used as long as they have openings at one end and the other end and have space inside.

[0022] The cylindrical portion 111 is a metal component formed in a cylindrical shape, and houses the optical element 12, the light source portion 13, the cover 14, the base portion 16, the motor 17, and the electronic circuit 18 inside. Furthermore, when the angle between axis X and axis Y coincides (see Figure 2), that is, when the angle between axis X and axis Y, where the base 20 and the lamp body 10 are aligned in a straight line, is 0°, the cylindrical portion 111 retracts the arm portion 15 inward. As the angle between axis X and axis Y increases (see Figures 3 and 4), a portion of the arm portion 15 is exposed outward through the notch 112.

[0023] The notch 112 is a portion formed by cutting out a part of the cylindrical portion 111. The notch 112 is located on the upper U side of the cylindrical portion 111. Details of the heat dissipation structure provided by the notch 112 will be described later. The size of the notch 112 can be adjusted as needed to match the size of the arm portion 15.

[0024] The optical element 12 is mounted in the opening on the lower D side of the housing 11 and consists of a reflector and a lens. It refracts the light output from the light source unit 13 mounted on the upper U side to adjust the illumination state. However, the configuration of the optical element 12 is not limited to this.

[0025] The light source unit 13 is a component that outputs light to illuminate a specific area of ​​a building. The light source unit 13 includes a light source support 131 and a light source 132.

[0026] The light source support 131 is a component for attaching the light source 132 to the base portion 16. The light source support 131 is attached to the lower D side surface of the base portion 16. The light source 132 is a light-emitting device that emits light to illuminate a specific area of ​​a building. In this embodiment, the light source 132 is an LED, but it is not limited to this, and may be an OLED (Organic Light Emitting Diode), an HID (High Intensity Discharge) lamp, or a laser light source, for example.

[0027] The cover 14 is attached to one end of the housing 11, specifically to the opening on the upper U side, and is a component that protects the motor 17 and electronic circuit 18 from dust. The cover 14 is provided with a slit 141, which serves as a first ventilation opening, and a second ventilation opening 143, for efficiently dissipating the heat generated by the light source unit 13, motor 17, and electronic circuit 18. Details of the heat dissipation structure in the lamp unit 10, including the slit 141 and the second ventilation opening 143, will be described later.

[0028] The arm portion 15 is composed of a metal component for connecting the lamp body portion 10 and the base portion 20. The arm portion 15 is a component for performing the tilting motion of the lamp body portion 10 by the operation of the motor 17. The arm portion 15 includes a connecting portion 151 and a rotating gear 152.

[0029] The connecting portion 151 is a component for connecting the arm portion 15 to the bottom plate 24 and the base portion 16. A rotating gear 152 is provided in the outer O region on the lower D side of the connecting portion 151.

[0030] The rotating gear 152 is the part that rotates the motor 17 side relative to the arm 15 based on the power transmitted from the motor 17. Specifically, the rotating gear 152 has a shape that meshes with a gear connected to the motor 17, and by rotating the motor 17 side relative to the arm 15 using the rotating gear 152, the light body 10 can be rotated relative to the base 20.

[0031] The base portion 16 is mounted approximately in the center of the axial direction UD of the housing 11 and is a member for fixing each component housed inside the housing 11. The base unit 16 includes a lamp base 161, a motor base 162, and a circuit mounting section 163.

[0032] The lamp base 161 is a disc-shaped component to which the optical element 12, light source unit 13, cover 14, and arm unit 15 are attached. Furthermore, the lamp body base 161 is provided with a motor base 162 and a circuit mounting section 163.

[0033] The motor base 162 is provided on the upper U-shaped surface of the lamp body base 161 and is a component for mounting the motor 17.

[0034] The circuit mounting section 163 is provided on the upper U-side surface of the lamp base 161 and is a component for mounting the electronic circuit 18.

[0035] The motor 17 is a component that provides power to rotate the arm portion 15. The motor 17 is attached to the base portion 16 by a motor base 162. In this embodiment, motor 17 is a stepping motor, but motor 17 is not limited to this and may be a servo motor or a DC motor.

[0036] The electronic circuit 18 is a circuit for controlling the light source unit 13 and the motor 17. The electronic circuit 18 is attached to the base unit 16 by the circuit mounting part 163. Note that the electronic circuit 18 is not limited to being housed in the housing 11 of the light body unit 10, but may also be housed in the housing 21 of the base unit 20.

[0037] As shown in Figures 2 to 4, the lamp body 10 tilts around an axis perpendicular to the axis X that runs along the axial direction of the base 20. Specifically, as shown in Figure 2, if the angle at which axis X and axis Y coincide is defined as 0 degrees, the light unit 10 can rotate starting from the base 20 until the angle between axis X and axis Y reaches 90 degrees, as shown in Figure 4.

[0038] <<Configuration of the heat dissipation structure of the light fixture>> Figure 7 is a perspective view from the cover 14 side showing the state in which the lamp body 10 and base 20 of the lighting device 100 are at a certain angle. Figure 8 is a side view showing the state in which the lamp body 10 and base 20 of the lighting device 100 are at a certain angle. Figure 9 is a side view showing the state in which the lamp body 10 and base 20 of the lighting device 100 are in a straight line.

[0039] The heat dissipation structure of the lamp body 10 in the lighting device 100 will be described with reference to Figures 1 to 9.

[0040] As shown in Figures 1 and 9, in the lighting device 100, the housing 11 of the lamp body 10 is a metal member formed in a cylinder having a cylindrical portion 111 and a notched portion 112, as described above.

[0041] The cylindrical portion 111 is a side portion formed on the cylinder of the housing 11. The cylindrical portion 111 is provided with openings at both ends that connect the inner space to the outside. The cylindrical portion 111 houses the optical element 12, the light source unit 13, the cover 14, the base unit 16, the motor 17, and the electronic circuit 18 in its inner space.

[0042] The notch 112 is a portion formed by cutting out a part of the side surface of the cylindrical portion 111, centered on the axis Y. The notch 112 is located on the upper U side of the cylindrical portion 111. The longitudinal direction of the notch 112 extends from the upper U end of the cylindrical portion 111 toward the lower D side, covering a length of more than half, specifically about 60%, of the axial direction UD of the cylindrical portion 111. The short direction of the notch 112 is formed by cutting out a portion extending in the circumferential direction of the cylindrical portion 111. In the housing 11, the notch 112 forms a side opening that connects the inner space to the outside.

[0043] As shown in Figure 5, the light source unit 13 is located inside the opening at the other end of the housing 11, specifically on the lower D side. The light source unit 13 is attached to the base unit 16 inside the housing 11. As shown in Figure 6, the light source 132 is attached to the lamp body base 161 of the base unit 16 via a light source support 131. The light source 132 is located at the center of the radial CO of the lamp body base 161 that constitutes the base unit 16. The lamp body base 161 is attached approximately in the center of the axial UD of the housing 11. In other words, the light source 132 is located at the position of axis Y passing through the center of the opening surface of the housing 11 of the lamp body unit 10.

[0044] As shown in Figures 2 to 4 and Figure 7, in the lamp unit 10, the cover 14 attached to one side of the housing 11, specifically the opening on the upper U side, is provided with a slit 141 as a first ventilation opening and a second ventilation opening 143.

[0045] As shown in Figure 7, the slit 141 connects the inside and outside of the housing 11 in the cover 14 that closes the opening on the upper U side of the housing 11. The slit 141 is located on the main surface (the surface with the largest area on the cover 14) of the cover 14 that extends in the radial direction CO perpendicular to the axial direction UD, at a position corresponding to the upper U side of the motor 17. The slit 141 is formed so that the longitudinal direction of the opening faces up and down when the lighting device 100 is mounted on the duct rail. The number of openings in the slit 141, as well as the width and length of the openings, are not particularly limited.

[0046] As shown in Figures 2 to 4 and Figure 7, the second vent 143 is provided on the side of the cover 14. The second vent 143 connects the inside and outside of the housing 11. The number, size, and shape of the second vent 143 are not particularly limited.

[0047] The motor 17 is located in the space of the housing 11, via the motor base 162 and the lamp body base 161, on the side O of the axis Y passing through the center of the space in the radial direction CO perpendicular to the axial direction UD. Here, the light source 132 is located at the position of the axis Y passing through the center of the opening surface of the housing 11 of the lamp body 10. In other words, the motor 17 is located at a distance in the radial direction CO from directly above the light source 132.

[0048] The motor base 162 is a component for attaching the motor 17 to the arm portion 15. The motor base 162 is made of resin and has a motor holding portion 164 formed to surround the case of the motor 17. The position of the motor 17 may be directly above the light source 132 if the motor base 162 is present.

[0049] <<Operation of Lighting Devices>> Next, the operation of the lighting device 100 having the configuration described above will be explained.

[0050] The housing 11 of the lamp body 10 has an opening in the cylindrical portion 111 on the side, and has a notch 112 through which the arm portion 15 can pass when the lamp body 10 rotates relative to the arm portion 15. As shown in Figure 9, air AI from the outside can be efficiently drawn into the housing 11 through the notch 112. Air AI can be efficiently drawn into the housing 11 from the outside through the notch 112, especially when the angle between the base portion 20 and the lamp body 10 is 0° or close to it.

[0051] The cover 14 of the light unit 10 has a slit 141 that connects the inside and outside of the housing 11. The slit 141 is provided on the surface of the cover 14 that closes the opening on the upper U side of the housing 11 (the upper U side surface), and connects the inside and outside of the housing 11. As shown in Figures 7 and 8, the slit 141 promotes ventilation, and the air AO, whose temperature has risen due to the heat emitted by the light source 132 of the light source unit 13, is released to the outside of the housing 11. The slit 141 can efficiently release the air AO to the outside, especially when the angle between the base 20 and the light unit 10 is 45° or close to it, as shown in Figures 7 and 8.

[0052] The slit 141 is located in the radial direction CO perpendicular to the axial direction UD in the cover 14, at a position corresponding to the upper U side of the motor 17. The slit 141 promotes ventilation in the lighting device 100, allowing the air AO, whose temperature has risen due to the heat emitted by the light source 132, to be efficiently released from around the motor 17 to the outside of the housing 11. In other words, the lighting device 100 provides a housing 11 with a thermal design that does not exceed the upper limit of the allowable temperature of the motor 17 or other electronic components, or optical elements such as lenses.

[0053] In the lighting device 100, the motor 17 is positioned away from directly above the light source 132. Therefore, the lighting device 100 can avoid heat generated from the light source 132 directly rising to the motor 17. In other words, the lighting device 100 can provide a housing 11 with a thermal design that does not exceed the upper limit of the motor 17's allowable temperature.

[0054] In the lighting device 100, the lamp body 10 has a resin motor base 162 for attaching the motor 17 to the arm 15. The motor base 162 has a motor holding portion 164 formed to surround the case of the motor 17. According to the lighting device 100, the motor base 162 is made of resin, which has a lower thermal conductivity than metal, and the case of the motor 17 is housed in the motor holding portion 164 of the motor base 162, thereby shielding the motor 17 from the heat emitted from the light source 132.

[0055] In the lighting device 100, the cover 14 has a second ventilation opening 143 on its side that connects the inside and outside of the housing 11. The second ventilation opening 143 promotes ventilation, allowing air whose temperature has risen due to the heat emitted by the light source 132 of the light source unit 13 to be released to the outside of the housing 11. The second ventilation opening 143 can efficiently release air to the outside and promote heat dissipation, especially when the angle between the base 20 and the lamp body 10 is 0° or close to it.

[0056] As explained above, the lighting device 100 can improve heat dissipation performance.

[0057] Furthermore, those skilled in the art may modify the present invention as appropriate in accordance with prior art knowledge. Such modifications, insofar as they still possess the configuration of the present invention, are of course included within the scope of the present invention. [Explanation of symbols]

[0058] 10...Lighting unit, 11...Housing, 12...Optical element, 13...Light source unit, 14...Cover, 15...Arm unit, 16...Base unit, 17...Motor, 18...Electronic circuit, 20...Base unit, 21...Housing, 22...Top plate, 23...Support, 24...Bottom plate, 100...Lighting device, 111...Cylindrical unit, 112...Notch (side opening), 131...Light source support, 132...Light source, 141...Slit (first ventilation opening), 143...Second ventilation opening, 151...Connection unit, 152...Rotating gear, 161...Lighting unit base, 162...Motor base, 163...Circuit mounting unit, 164...Motor holding unit, 231...Center hook unit, 232...Side hook unit

Claims

1. A base that is connected to the wiring device via a support, The arm portion attached to the base, A light fixture is rotatably mounted to the aforementioned arm portion, It is a lighting device equipped with, The lamp body comprises a light source, a motor for rotating the lamp body relative to the arm, a housing having openings at both ends that connect the internal space to the outside and housing the light source and the motor in the internal space, and a cover that covers the opening at one end. The housing has an opening on its side, which allows the light body to pass through when it rotates relative to the arm. Lighting device.

2. The cover has a first ventilation opening that connects the inside and outside of the housing. The lighting device according to claim 1.

3. The first ventilation opening is provided on the main surface of the cover, above the motor. The lighting device according to claim 2.

4. The lamp body has a resin motor base for attaching the motor to the arm portion. The motor base has a motor holding portion formed to surround the motor case. The lighting device according to claim 1 or 2.

5. The cover has a second ventilation opening on its side that connects the space within the housing to the outside. The lighting device according to claim 1 or 2.

6. The light source is provided in the opening on the other end, The motor is located inside the housing, in a direction perpendicular to the axial direction, and outside the center of the space within the housing. The lighting device according to claim 1 or 2.

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