Lighting fixtures

Abstract

To provide a lighting device which can achieve downsizing without using a fixture, such as a screw, when a reflection member is attached to a device body.SOLUTION: A lighting device includes: a light source part 41 having multiple LED elements 42; a power supply part 31 which supplies electric power to the light source part 41; a cylindrical device body 21 which houses the light source part 41 and the power supply part 31; and a set plate 61 in which the light source part 41 is installed. The set plate 61 is arranged so as to be housed at the inner peripheral surface side of the device body 21. In the device body 21, a positioning part 22a is provided on an inner peripheral surface. The set plate 61 rotates within the device body 21 to contact with the positioning part 22a.SELECTED DRAWING: Figure 2

Description

Technical Field

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

Background Art

[0002] Conventionally, a lighting fixture (ceiling light) described in Patent Document 1 has been used. In Patent Document 1, a thin and small ceiling-mounted lighting fixture is disclosed. This lighting fixture includes a reflector to which a light-emitting portion is attached, a fixture body to which the reflector is detachably attached, and a translucent cover that is detachably attached to the fixture body. Further, this lighting fixture fixes the fixture body to the attachment portion, attaches the reflector to the fixture body using a screw or the like, and then attaches the translucent cover by screwing it into a groove on the side surface of the fixture body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional lighting fixture, since the outer peripheral side of the reflector is attached to the fixture body using a screw or the like, the lighting fixture may be enlarged. Therefore, a lighting fixture that can be miniaturized without using a fixing tool such as a screw is desired.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a lighting fixture that can be miniaturized without using a fixing tool such as a screw when attaching a reflecting member to a fixture body.

Means for Solving the Problems

[0006] The problems to be solved by the present invention are as described above. Next, means for solving this problem will be described.

[0007] In other words, the lighting fixture disclosed in this application is A light source unit having multiple LEDs, A power supply unit that supplies power to the light source unit, A cylindrical fixture body in which the light source unit and the power supply unit are housed, The set plate on which the light source unit is installed comprises, The set plate is arranged to be housed on the inner circumferential side of the main body of the device. The aforementioned device body is provided with a positioning portion on its inner circumferential surface. The set plate rotates within the main body of the device, thereby making contact with the positioning part. death, The device body has a circumferential end that protrudes inward from the end on the irradiation surface side, intersecting with the end on the irradiation surface side. An elastic member is provided between the peripheral end of the main body of the device and the set plate. The restoring force of the elastic member causes the set plate to be pressed in the direction opposite to the irradiation surface and to come into contact with the positioning portion. It is.

[0008] In the lighting fixture disclosed in this application, The set plate has a funnel-shaped reflective surface that surrounds the outer periphery of the light source unit. The power supply unit is preferably positioned on the set plate on the side opposite to the reflective surface.

[0009] In the lighting fixture disclosed in this application, The power supply unit has a power supply circuit section and a power supply cover section that covers the power supply circuit section, The power supply cover portion is preferably engageable with the set plate and fixed to the main body of the device by a fixing member.

[0010] In the lighting fixture disclosed in this application, The set plate has a peripheral edge on the outside of the reflective surface, The peripheral edge has a notch, Preferably, a portion of the power supply unit protrudes from the notch towards the outer circumference of the set plate.

[0011] In the lighting fixture disclosed in this application, The set plate preferably has an extension portion connecting the outer peripheral end of the reflecting surface and the peripheral portion.

[0013] In the lighting fixture disclosed in the present application, a light-transmitting panel is provided at an end portion on the irradiation surface side of the fixture body, the light-transmitting panel is preferably arranged to face the set plate, and has a protruding portion protruding toward the irradiation surface side and a flange portion supported by the peripheral end portion on the outer peripheral side of the protruding portion.

[0015] In the lighting fixture disclosed in the present application, the set plate preferably has a terminal block arrangement portion where a terminal block can be arranged on the side opposite to the reflecting surface.

Advantages of the Invention

[0016] According to the present invention, it is possible to provide a lighting fixture that can be miniaturized without using a fixing tool such as a screw when attaching a reflecting member to a fixture body.

Brief Description of the Drawings

[0017] [Figure 1] A perspective view showing a lighting fixture according to an embodiment of the present invention. [Figure 2] A front cross-sectional view showing the lighting fixture attached to the attachment portion. [Figure 3] An exploded perspective view of the lighting fixture as seen obliquely downward. [Figure 4] An exploded perspective view of the lighting fixture as seen obliquely upward. [Figure 5] A perspective view of the set plate as seen obliquely upward. [Figure 6] A perspective view of the set plate as seen obliquely downward. [Figure 7] A plan view of the lighting fixture. [Figure 8] A cross-sectional view taken along line A-A of the lighting fixture. [Figure 9] A bottom view of the lighting fixture. [Modes for carrying out the invention]

[0018] A lighting fixture 11 according to one embodiment of the present invention will be described with reference to Figures 1 to 9. The lighting fixture 11 according to this embodiment is a lighting fixture that uses an LED element 42 as a light source. The lighting fixture 11 can be used as a direct-mount type ceiling light that can be directly attached to a mounting part C such as a ceiling surface. In addition, the lighting fixture 11 can be attached not only to a ceiling surface but also to a wall surface (including an inclined surface) and used as a bracket light. In the following description, the side of the lighting fixture 11 that emits light will be referred to as the illumination surface side of the lighting fixture 11, and the side of the lighting fixture 11 facing the mounting part C will be referred to as the mounting surface side of the lighting fixture 11 (opposite side of the illumination surface side). The mounting surface side of the lighting fixture 11 is the back side (rear side) of the lighting fixture 11. Furthermore, in the state in which the lighting fixture 11 shown in Figure 2 etc. is attached to the mounting part C, if the direction perpendicular to the mounting part C is considered the up and down direction of the lighting fixture 11, the mounting surface side of the lighting fixture 11 will be referred to as the up, and the direction directly below the illumination surface side of the lighting fixture 11 will be referred to as the down. The direction perpendicular to the vertical direction of the lighting fixture 11 will be described as the side of the lighting fixture 11. In the following description, the view of the lighting fixture 11 etc. from above will be referred to as a plan view. The view of the lighting fixture 11 etc. from a direction perpendicular to the vertical direction will be referred to as a side view. The view of the cross-sectional shape of the lighting fixture 11 etc. will be referred to as a cross-sectional view.

[0019] As shown in Figures 1 to 4, the lighting fixture 11 mainly comprises a fixture body 21, a power supply unit 31, a light source unit (LED module) 41, a light-transmitting panel 51, a set plate 61 which is a reflective member, a mounting member 91, and a terminal block 81. The external shape of the lighting fixture 11 is approximately circular in plan view, and the dimension in the height direction (the vertical direction of the lighting fixture 11 in Figure 2) is smaller than the dimension in the radial direction (the direction perpendicular to the vertical direction of the lighting fixture 11 in Figure 2), resulting in a thin, flat, approximately cylindrical shape. The external shape of the lighting fixture 11 is not limited to this embodiment. In addition to being approximately circular in plan view, the external shape of the lighting fixture 11 can also be, for example, elliptical, square, rectangular, polygonal, or sector-shaped, or a combination thereof.

[0020] The fixture body 21 is a component that holds the power supply unit 31, the light source unit (LED module) 41, the light-transmitting panel 51, the set plate 61, and the terminal block 81, and is attached to the mounting member 91. The fixture body 21 is a substantially cylindrical component with an opening on the lower side for exposing the light-transmitting panel 51 and an open upper end. The fixture body 21 houses the power supply unit 31, the light source unit 41, the light-transmitting panel 51, the set plate 61, and the terminal block 81. The fixture body 21 has a cylindrical portion 22 and an annular peripheral portion 23 that extends radially inward from the lower end of the cylindrical portion 22. The fixture body 21 is made of a material with high thermal conductivity, such as metal. In this embodiment, as an example, the fixture body 21 is made of an aluminum alloy, which can dissipate the heat generated from the power supply unit 31 and the light source unit 41. The maximum inner diameter of the fixture body 21 is larger than the outer diameter of the mounting plate member 93 of the mounting member 91, and it can be attached to the irradiation surface side of the mounting member 91.

[0021] The device body 21 has a plurality of convex positioning portions 22a (three in this embodiment) on the inner circumferential surface of the cylindrical portion 22, and a plurality of convex locking portions 22b (three in this embodiment) that are roughly rectangular in shape when viewed from the side and are provided at the upper end of the cylindrical portion 22 corresponding to each positioning portion 22a. The positioning portions 22a and locking portions 22b are formed at approximately equal intervals along the circumferential direction on the inner circumferential surface of the cylindrical portion 22.

[0022] The lower end of the positioning portion 22a restricts the position of the upper end of the set plate 61 when attaching the set plate 61 to the fixture body 21. This allows the set plate 61 to be held in a predetermined position at the bottom of the fixture body 21. The locking portion 22b is the part that locks onto the locking portion 98 of the mounting plate member 93, which will be described later. By attaching the locking portion to the locking portion 98 of the mounting plate member 93, the fixture body 21 is attached to the mounting member 91. In this embodiment, the fixture body 21 also has a protrusion 22c. The protrusion 22c, like the positioning portion 22a, restricts the position of the upper end of the set plate 61. The protrusion 22c is not necessarily an essential component, and multiple protrusions may be provided.

[0023] The fixture body 21 has a peripheral end portion 23 that protrudes vertically from the end on the irradiation surface side toward the inner circumference. The peripheral end portion 23 of the fixture body 21 faces the outer peripheral edge on the irradiation surface side of the light-transmitting panel 51. The peripheral end portion 23 is the part that extends radially inward from the lower end of the fixture body 21. Furthermore, a groove is provided along the circumferential direction at the peripheral end portion 23. An annular packing 24, which is an elastic member, is positioned along the groove at the peripheral end portion 23. Due to the restoring force of the packing 24, the set plate 61 is pressed in the direction opposite to the irradiation surface side and comes into contact with the positioning portion 22a and the protrusion 22c. Furthermore, the packing 24 is intended to cover the gaps between the peripheral edge 23, the light-transmitting panel 51, and the set plate 61, and acts as a so-called airtight packing to prevent water droplets, dust, etc. from entering the interior of the lighting fixture 11.

[0024] One of the positioning portions 22a is provided with a screw fixing portion 25 that protrudes radially inward from the surface of the positioning portion 22a. The screw fixing portion 25 is a part for fixing the screw insertion recess 33b of the power supply cover portion 33 with a mounting member such as a screw.

[0025] The inner circumferential surface of the cylindrical portion 22 is provided with two rows of protruding portions 22d, 22d, which are arranged parallel to each other in the vertical direction. The protruding portions 22d are parts that project radially inward. The protruding portions 22d are the engaged portions to which the elastic engaging portion 95 of the mounting member 91 engages when the fixture body 21 is attached to the mounting member 91.

[0026] The fixture body 21 is designed to be detachable from the mounting member 91. Furthermore, the material of the fixture body 21 may be other than aluminum alloy; for example, other metal materials, resins, etc., can be selected as needed.

[0027] The power supply unit 31 is a power supply device that supplies power to the LED elements 42 of the light source unit 41 to light up the LED elements 42. The power supply unit 31 is located above the light source unit 41 on the fixture body 21 (on the mounting surface side). The power supply unit 31 has a power supply circuit unit 32 and a power supply cover unit 33 that covers the power supply circuit unit 32. The power supply circuit unit 32 has a rectangular parallelepiped insulating case unit 32a and a power supply circuit 32b located inside the case unit 32a, on which multiple electronic components are mounted on a printed circuit board processed to a predetermined shape. The power supply cover unit 33 is located so as to overlap the power supply circuit unit 32 in a plan view.

[0028] Furthermore, the power supply cover portion 33 is engageable with the set plate 61 and is fixed to the fixture body 21 by mounting members such as screws. More specifically, the power supply cover portion 33 has a locking piece 33a and a screw insertion recess 33b. The locking piece 33a is locked to the cover locking portion 63 of the set plate 61. The screw insertion recess 33b is fastened to the screw fixing portion 25 of the fixture body 21 by mounting members such as screws. This configuration fixes the power supply circuit portion 32 and prevents relative rotation of the set plate 61 within the fixture body 21.

[0029] The power supply unit 31 converts the alternating current supplied from an external commercial power source into a predetermined direct current and supplies the converted current to a plurality of LED elements 42 mounted on the circuit board 43.

[0030] The power supply unit 31 is electrically connected to the terminal block 81 via electric wires (not shown). For example, when the lighting fixture 11 is installed on the mounting part C, the power supply unit 31 is electrically connected to the external commercial power supply by connecting the power wires (not shown) of the external commercial power supply on the ceiling side to the terminal block 81. The power supply unit 31 and the light source unit 41 are electrically connected by electric wires (not shown). In this embodiment, a terminal block 81 is used, but this is not a limitation. For example, instead of using a terminal block 81, a configuration using connecting components such as connectors can also be used.

[0031] The light source unit 41 is the part that emits light toward the irradiation surface side of the lighting fixture 11. The light source unit 41 is a light source module having a light-emitting element, which is the light source. In this embodiment, an LED light source module is used as the light-emitting element, in which multiple LED (Light emitting diode) elements 42, which are light sources, are surface-mounted on a substrate 43. Specifically, the LED light source module is a module in which multiple LED elements 42 are arranged on the surface of a substrate 43 that has been processed into a roughly disc shape. The light source unit 41 is positioned on the irradiation surface side of the set plate 61. The multiple LED elements 42 are arranged to face each other near the outer peripheral edge on the mounting surface side of the light-transmitting panel 51.

[0032] In this embodiment, a surface-mount LED element 42 was used as the light source, but the type of light source is not limited to LED elements; for example, it can also be implemented using a COB type light-emitting module or an organic EL element (OLED).

[0033] The light-transmitting panel 51 is attached to the fixture body 21 so as to cover at least the irradiation surface side of the light source unit 41. It is a light-transmitting member that guides the light emitted from the light source unit 41 (LED element 42) while reflecting and diffusing it, and controls the light distribution of the light emitted to the outside of the light-transmitting panel 51. The light-transmitting panel 51 is positioned opposite the set plate 61 and guides the light emitted from the light source unit 41 (LED element 42) positioned on the irradiation surface side of the set plate 61, so that it can be emitted to the outside of the light-transmitting panel 51 as surface light emission. The light-transmitting panel 51 is positioned opposite the set plate 61 and has a protruding portion 51a that protrudes toward the irradiation surface side and a flange portion 51b provided on the outer circumference of the protruding portion 51a. The flange portion 51b is supported by the peripheral end portion 23 of the fixture body 21. The light-transmitting panel 51 is made of a light-transmitting resin material. The light-transmitting panel 51 is subjected to a diffusion treatment. In the translucent panel 51 of this embodiment, a printed layer is formed on the surface of the irradiation side exposed from the opening of the fixture body 21 by white (semi-translucent) silk screen printing in a dot pattern. The translucent panel 51 is not limited to having a printed layer of a dot pattern, but can also be made of a printed layer other than a dot pattern, a panel with a textured surface (frosted surface) with fine irregularities, a panel with a diffusing agent mixed inside, or a panel with a diffuse reflective sheet attached.

[0034] The set plate 61 is a roughly disc-shaped metal component. The set plate 61 has a light source placement surface 62 that extends over substantially the entire surface on the irradiation side and faces the fixture body 21, on which the light source unit 41 is positioned at a predetermined location inside the fixture body 21. The light source unit 41 is placed on the light source placement surface 62 of the set plate 61, and the power supply unit 31 and terminal block 81 are placed on the mounting side. The light source placement surface 62 is formed to have a flat surface in order to increase the contact area with the substrate 43 in order to transfer the heat generated from the light source unit 41.

[0035] As shown in Figures 5 to 9, the set plate 61 has a cover locking portion 63 and a terminal block placement portion 69 in the area corresponding to the reflective surface 66, which will be described later. The cover locking portion 63 is the part to which the locking piece 33a of the power supply cover portion 33 is locked. In this embodiment, the cover locking portion 63 is formed as a hole that penetrates the set plate 61, but it may also be formed as a cut-out shape or the like. By locking the locking piece 33a to the cover locking portion 63, the power supply cover portion 33 can be positioned at an appropriate position on the set plate 61. The terminal block placement portion 69 is the part to which the terminal block 81 is attached. In this embodiment, the terminal block placement portion 69 is formed to protrude towards the mounting surface side of the set plate 61, so that the terminal block 81 can be positioned with minimal tilt relative to the horizontal direction of the device body 21.

[0036] The set plate 61 has a funnel-shaped reflective surface 66 that surrounds the outer periphery of the light source unit 41. The funnel-shaped reflective surface 66 is positioned around the light source placement surface 62 on which the light source unit 41 is placed, and is formed to protrude from the light source placement surface 62 while being inclined toward the irradiation surface. With this configuration, the irradiation light emitted from the light source unit 41 is efficiently reflected by the reflective surface 66, and the amount of irradiation light is amplified.

[0037] Furthermore, the power supply unit 31 is positioned on the set plate 61 on the opposite side from the reflective surface 66 and above (towards the mounting surface) the light source unit 41 on the fixture body 21. With this configuration, the light source unit 41 is positioned so as not to overlap with the power supply unit 31 in a plan view, thus minimizing the thermal influence between them.

[0038] Furthermore, the set plate 61 has a peripheral edge 67 on the outside of the reflective surface 66. More specifically, the set plate 61 has an extension 68 connecting the outer peripheral end of the reflective surface 66 and the peripheral edge 67. The extension 68 has a first extension 68a that protrudes outward from the outer peripheral end of the reflective surface 66 so as to be parallel to the light source placement surface 62, and a second extension 68b that is formed to protrude outward from the outer peripheral end of the first extension 68a while being inclined toward the mounting surface. The peripheral edge 67 protrudes outward from the outer peripheral end of the second extension 68b.

[0039] By configuring it in this way, the rigidity of the set plate 61 is increased by providing the extension portion 68.

[0040] The peripheral edge 67 of the set plate 61 has an outer arc portion 67a, which has dimensions approximately the same as the radius of the inner circumferential surface of the cylindrical portion 22 of the fixture body 21, and an inner arc portion 67b, which has a smaller diameter than the outer arc portion 67a and is a notch formed to allow the corresponding positioning portion 22a, etc., to pass through when the set plate 61 is housed inside the fixture body 21. When attaching the set plate 61, to which the light source unit 41 and power supply unit 31 are attached, to the fixture body 21, the positioning portion 22a, etc., is passed through the inner arc portion 67b. After the set plate 61 is placed at the bottom of the fixture body 21, it is rotated by a predetermined distance to one side in the circumferential direction of the fixture body 21 so that the outer arc portion 67a is positioned below the positioning portion 22a, etc. (see Figure 7). Specifically, the portion of the set plate 61 on which the power supply unit 31 is positioned is rotated circumferentially to the position of the screw fixing portion 25 of the fixture body 21. Then, with the screw insertion recess 33b of the power supply cover portion 33 aligned with the screw fixing portion 25 of the fixture body 21, it is fastened with a mounting member such as a screw (see Figure 2). In this way, in this embodiment, the set plate 61 having the light source portion 41 and the power supply unit 31 is positioned relative to the fixture body 21, and the set plate 61 can be stably held on the fixture body 21 with only one screw member for fixing. As a result, the amount of work required for fixing with screw members is reduced, and the installation of the set plate 61 on the fixture body 21 becomes easier.

[0041] Furthermore, a notch 67c is provided in the peripheral edge 67. The notch 67c is formed by cutting out the peripheral edge 67 and the second extension 68b. The case portion 32a of the power supply unit 31 protrudes from the notch 67c toward the outer circumference of the set plate 61. In this embodiment, the two outer corners of the case portion 32a that contact the set plate 61 protrude from the notch 67c toward the outer circumference of the set plate 61. With this configuration, the power supply circuit unit 32 can be easily positioned by the notch 67c of the set plate 61, and its movement within the power supply cover portion 33 can be restricted by the notch 67c. In addition, the power supply circuit unit 32 can be positioned further toward the outer circumference within the fixture body 21, and can be positioned away from the light source arrangement surface 62. This prevents the fixture body 21 from becoming larger, and the power supply circuit unit 32 is less affected by the heat generated from the light source unit 41.

[0042] Furthermore, the set plate 61 has a terminal block placement section 69 on the opposite side of the reflective surface 66, where the terminal block 81 can be placed. This configuration makes it easier to place the terminal block 81 in the terminal block placement section 69, which is a predetermined position. Furthermore, the terminal block arrangement section 69 bulges outward toward the mounting surface compared to the other surfaces of the reflective surface 66, and is formed to appear as a recess when viewed from the illumination surface side. The terminal block arrangement section 69 is provided with leg insertion holes 69a for inserting the legs 81a of the terminal block 81. In this embodiment, a terminal block with grounding is used as the terminal block 81. The terminal block arrangement section 69 has a grounding section 69b at a position corresponding to the grounding electrode 81b of the terminal block 81. The terminal block 81 is fixed to the terminal block arrangement section 69 by inserting the legs 81a into the leg insertion holes 69a, and the grounding electrode 81b and the grounding section 69b are connected, allowing for electrical conductivity with the set plate 61. With this configuration, even when the legs 81a are inserted into the leg insertion holes 69a and the grounding electrode 81b is inserted into the grounding section 69b, the legs 81a and grounding electrode 81b are housed in the recess when viewed from the illumination surface side, making it easier to achieve a uniform light-emitting surface with less shadowing. In this embodiment, a terminal block with grounding was used as the terminal block 81, but it is not limited to this, and a terminal block without grounding may also be used. Furthermore, it is not limited to fixing using the legs 81a of the terminal block 81, but can also be attached using fixing members such as screw members.

[0043] The mounting member 91 is a member that is pre-attached to the mounting part C by screws or the like (not shown) when attaching the lighting fixture 11 to the mounting part C. The mounting member 91 has a mounting plate member 93 that is pre-attached to the mounting part C and a disc-shaped packing 92 that covers the mounting surface side of the mounting plate member 93. The mounting plate member 93 is a member that is pre-attached to the mounting part C and has a through hole 93a for inserting power wires (not shown) of an external commercial power supply and a lever relief hole 93b that is cut out at a position that overlaps with the release lever 81c of the terminal block 81.

[0044] The upper packing 92 is roughly disc-shaped and covers the mounting surface side of the fixture body 21 and the mounting plate member 93 when the mounting member 91 is attached to the mounting part C. The upper packing 92 can prevent foreign matter such as water and dust from entering the fixture body 21. For this reason, it is preferable to use it when installing the lighting fixture 11 outdoors. The upper packing 92 has a through hole 92a for inserting power wires (not shown) from an external commercial power supply. Note that the upper packing 92 is not an essential component and can be omitted depending on the installation location, such as indoors.

[0045] Furthermore, the mounting plate member 93 is provided with an elastic engagement portion 95 and a plurality of locking portions 98 (three in this embodiment). The elastic engagement portion 95 has a spring portion 96 which is substantially U-shaped in plan view and a spring holding portion 97 which holds the spring portion 96. The elastic engagement portion 95 is held by the spring holding portion 97 such that a pressing force acts radially outward on the spring portion 96. The elastic engagement portion 95 is also configured to extend and retract in response to the radially inward force applied when the radially outward tip of the spring portion 96 contacts the protruding portion 22d of the device body 21. The locking portion 98 is provided at a position corresponding to the locking portion 22b of the fixture body 21. By engaging the locking portion 98 with the locking portion 22b, the locking portion 98 can position and support the fixture body 21 to a predetermined position. When the fixture body 21 is rotated relative to the mounting member 91, the elastic engaging portion 95 provided on the mounting member 91 moves circumferentially while pressing against the inner circumferential surface of the fixture body 21. At the same time, the locking portion 22b of the fixture body 21 is guided to a predetermined position by the locked portion 98 of the mounting plate member 93. When the elastic engaging portion 95 approaches the protruding portion 22d, the tip of the elastic engaging portion 95 moves radially inward along the protruding portion 22d. Further rotation causes the elastic engaging portion 95 to move over the top of the protruding portion 22d and return to its original shape due to the restoring force of the spring portion 96, and the tip returns to its original position. This prevents the fixture body 21 from rotating in the release direction (opposite direction to the mounting direction) relative to the mounting member 91. In addition, the locking portion 22b of the fixture body 21 is supported by the locked portion 98 of the mounting plate member 93. As a result, the fixture body 21 can be attached to the mounting member 91.

[0046] According to the lighting fixture 11 of this embodiment described above, it comprises a light source unit 41 having a plurality of LED elements 42, a power supply unit 31 that supplies power to the light source unit 41, a cylindrical fixture body 21 that houses the light source unit 41 and the power supply unit 31, and a set plate 61 on which the light source unit 41 is installed. The set plate 61 is arranged to be housed on the inner circumferential surface side of the fixture body 21, the fixture body 21 is provided with a positioning portion 22a on its inner circumferential surface, and the set plate 61 rotates within the fixture body 21 to come into contact with the positioning portion 22a. As a result, with the light source unit 41 installed on the set plate 61, the set plate 61 can be rotated within the fixture body to make contact with the positioning unit 22a. Therefore, the light source unit 41 can be easily positioned within the fixture body 21. Furthermore, the set plate 61 can be easily removed by rotating it in the opposite direction within the fixture body 21. Consequently, when attaching the set plate 61, which is a reflective member, to the fixture body 21, it is possible to achieve miniaturization without using fasteners such as screws. In addition, when installing the lighting fixture 11, it is possible to secure a large space for connecting to an external commercial power supply, making the installation work of the lighting fixture 11 easier.

[0047] Furthermore, in the lighting fixture 11 according to this embodiment, the set plate 61 has a funnel-shaped reflective surface 66 that covers the light source unit 41, and the power supply unit 31 is positioned on the set plate 61 on the opposite side from the reflective surface 66. This makes it possible to efficiently reflect light emitted from the light source unit 41 located on the central side of the illumination surface of the set plate 61, thereby reducing the number of LED elements 42 used in the light source unit. Furthermore, it is possible to provide a lighting fixture 11 that has LED elements 42 as a light source and can obtain thin, uniform illumination light. In addition, since the light source unit 41 located on the central side in a plan view and the power supply unit 31 located on the mounting surface side of the reflective surface 66 surrounding it are arranged so as not to overlap in a plan view, they are less likely to be affected by each other's heat.

[0048] Furthermore, in the lighting fixture 11 according to this embodiment, the power supply unit 31 has a power supply circuit unit 32 and a power supply cover unit 33 that covers the power supply circuit unit 32, the power supply cover unit 33 is engageable with a set plate 61 and is fixed to the fixture body 21 by a fixing member 71. This fixes the power supply circuit section 32 of the power supply unit 31 inside the fixture body 21 and prevents relative rotation of the set plate 61 within the fixture body 21.

[0049] Furthermore, in the lighting fixture 11 according to this embodiment, the set plate 61 has a peripheral edge 67 outside the reflective surface 66, and the peripheral edge 67 has a notch 67c, and a part of the power supply unit 31 protrudes from the notch 67c toward the outer circumference of the set plate 61. As a result, the movement of the power supply unit 31 is restricted by the notch 67c, making it easier to position the power supply unit 31. In addition, the power supply circuit unit 32 can be positioned further outward within the fixture body 21, and can be positioned away from the light source arrangement surface 62. This prevents the fixture body 21 from becoming larger, and the power supply circuit unit 32 is less affected by the heat generated from the light source unit 41.

[0050] Furthermore, in the lighting fixture 11 according to this embodiment, the set plate 61 has an extension portion 68 that connects the outer peripheral end and the peripheral edge portion 67 of the reflective surface 66. This improves the rigidity of the set plate 61 by adding the extension 68.

[0051] Furthermore, in the lighting fixture 11 according to this embodiment, the fixture body 21 has a peripheral end portion 23 that protrudes vertically from the end on the irradiation surface side toward the inner circumference. In addition, an annular packing 24, which is an elastic member, is arranged along the groove of the peripheral end portion 23. As a result, the packing 24 covers the gap between the light-transmitting panel 51 and the set plate 61, preventing water droplets, dust, etc. from entering the interior of the lighting fixture 11. In addition, the restoring force of the packing 24 presses the light-transmitting panel 51 and the set plate 61 toward the mounting surface. Therefore, the peripheral edge 67 of the set plate 61 is pressed against the positioning part 22a of the fixture body 21, etc., so that the set plate 61 can be positioned within the fixture body 21 without rattling. In this embodiment, the peripheral end portion 23 is provided to protrude vertically from the end portion of the device body on the irradiation surface side toward the inner circumference side. However, this is not the only option, and the shape can be modified as appropriate, for example, to widen toward the irradiation surface side or to have a stepped shape.

[0052] Furthermore, in the lighting fixture 11 according to this embodiment, a light-transmitting panel 51 is provided at the end of the fixture body 21 on the irradiation surface side. The light-transmitting panel 51 is positioned opposite the set plate 61 and has a projection 51a that protrudes toward the irradiation surface side and a flange 51b on the outer circumference of the projection 51a that is supported by the peripheral end 23. This allows the protruding portion 51a of the light-transmitting panel 51 to be positioned to match the inner opening of the peripheral edge 23 of the fixture body 21, making assembly easier. Furthermore, compared to a flat, translucent panel, the presence of a protruding portion 51a, which is at least treated for diffusion, allows for a greater distance from the LED element 42 of the light source unit 41. This enables uniform diffusion of the highly directional light emitted from the LED element 42 of the light source unit 41.

[0053] Furthermore, in the lighting fixture 11 according to this embodiment, the set plate 61 has a terminal block arrangement portion 69 on the opposite side of the reflective surface 66, on which a terminal block 81 can be arranged. This makes it easier to position the terminal block 81 in the terminal block placement section 69, which is the predetermined location.

[0054] Furthermore, the lighting fixture 11 according to this embodiment has a mounting member 91 fixed to the mounting part C, and the fixture body 21 is detachably attached to the mounting member 91. By engaging the elastic engaging part 95 with the protruding part 22d of the fixture body 21, the fixture body 21 is fixed in a position that prevents rotation with respect to the mounting member 91. In addition, a lever relief hole 93b is provided for operating the release lever 81c of the terminal block 81 when the fixture body 21 is attached to the mounting plate member 93. This prevents accidental operation of the release lever 81c and enables miniaturization of the lighting fixture. [Explanation of symbols]

[0055] 11 Lighting fixtures 21. Main body of the device 22a Positioning section 23 Peripheral end 24. Packing (elastic material) 31 Power supply section 32 Power supply circuit section 33 Power supply cover 41 Light source section 42 LED elements 51 Translucent Panel 51a Protrusion 61 Set Plates 66 Reflector 67 Peripheral area 67c Notch 68 Extension 69 Terminal block arrangement area 71 Fixing member 81 Terminal block 91 Mounting components C Mounted part

Claims

1. A light source unit having multiple LEDs, A power supply unit that supplies power to the light source unit, A cylindrical fixture body in which the light source unit and the power supply unit are housed, The set plate on which the light source unit is installed comprises, The set plate is arranged to be housed on the inner circumferential side of the main body of the device. The aforementioned device body is provided with a positioning portion on its inner circumferential surface. The set plate rotates within the main body of the device, thereby contacting the positioning portion. The device body has a circumferential end that protrudes inward from the end on the irradiation surface side, intersecting with the end on the irradiation surface side. An elastic member is provided between the peripheral end of the main body of the device and the set plate. A lighting fixture in which the set plate is pressed in the direction opposite to the illumination surface side by the restoring force of the elastic member and comes into contact with the positioning part.

2. The set plate has a funnel-shaped reflective surface that surrounds the outer periphery of the light source unit. The lighting fixture according to claim 1, wherein the power supply unit is arranged on the set plate on the side opposite to the reflective surface.

3. The power supply unit has a power supply circuit section and a power supply cover section that covers the power supply circuit section, The lighting fixture according to claim 1, wherein the power supply cover portion is engageable with the set plate and is fixed to the fixture body by a fixing member.

4. The set plate has a peripheral edge on the outside of the reflective surface, The peripheral edge has a notch, The lighting fixture according to claim 2, wherein a part of the power supply unit protrudes from the notch toward the outer circumference of the set plate.

5. The lighting fixture according to claim 4, wherein the set plate has an extension that connects the outer peripheral end of the reflective surface to the peripheral edge.

6. The end of the main body of the device on the irradiation surface side is provided with a light-transmitting panel. The light-transmitting panel is arranged to face the set plate and has a projection that protrudes toward the illumination surface and a flange that is supported by the peripheral end on the outer circumference of the projection, according to claim 1.

7. The lighting fixture according to claim 2, wherein the set plate has a terminal block arrangement portion on the side opposite to the reflective surface on which a terminal block can be arranged.

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