Lighting apparatus

Abstract

To provide an embedded luminaire having fire resistance without requiring complicated installation work by providing a fire-resistant cover capable of being easily installed on a luminaire body of the luminaire.SOLUTION: The luminaire body (20) includes a heat radiation plate (21) which is a light source arrangement member on which the LED module (10) is arranged, a frame body (22) having an irradiation opening (23) through which light emitted from the LED module (10) is irradiated, and a fire-resistant frame cover (24) which covers the heat radiation plate (21) and a portion of the frame body (22) arranged on a side of the embedding hole (H).SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] Recessed lighting fixtures, in which the fixture body is attached to a recessed hole in a mounting portion, have been known for some time. For example, the lighting fixture described in Patent Document 1 is a recessed lighting fixture that is recessed in a recessed hole in a ceiling, fixed with a spring, and emits light downward. In addition, a fire-resistant cover is disclosed for recessed lighting fixtures and other fixtures that prevents a fire from spreading to the ceiling space through a hole opened in the ceiling for an electrical equipment module (such as a downlight) (see Patent Document 2). Patent Document 2 also discloses that after the fire-resistant cover is installed in the ceiling space, the electrical equipment module is installed in the recessed hole in the ceiling. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-190214 [Patent Document 2] Japanese Patent Publication No. 2022-183768 Summary of the Invention [Problem to be solved by the invention]

[0004] The installation of fire-resistant covers had to be done for each electrical equipment module, and in the case of electrical equipment modules such as downlights, multiple modules are often installed on the ceiling, which could make the installation process very complicated.

[0005] Therefore, the present invention has been made in consideration of the above-mentioned problems, and aims to provide a fire-resistant recessed lighting fixture that has a fire-resistant cover on the fixture body, thereby eliminating the need for the complicated work of installing a fire-resistant cover on the mounting surface. [Means for solving the problem]

[0006] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0007] That is, the lighting fixture disclosed in the present application has: a light source unit; a fixture body in which the light source unit is disposed; a power supply unit that supplies power to the light source unit, and a recessed lighting fixture that is attached to a recessed hole of a mounting portion, The fixture body includes a light source arrangement member in which the light source unit is arranged; a frame body having an irradiation opening through which light emitted from the light source unit is irradiated; and a fire-resistant frame cover that covers the light source positioning member and the portion of the frame body that is arranged on the embedding hole side.

[0008] In the lighting fixture disclosed in the present application, The frame cover preferably has a flange, and the outer diameter of the flange is larger than the inner diameter of the embedding hole.

[0009] In the lighting fixture disclosed in the present application, The light source mounting member and the frame are preferably made of a metal material with high heat dissipation properties.

[0010] In the lighting fixture disclosed in the present application, The frame cover is preferably provided so as to abut against the light source placement member.

[0011] In the lighting fixture disclosed in the present application, the power supply unit has a fireproof power box, The power supply box may be provided so as to be stacked on the upper surface side of the frame cover. [Effects of the Invention]

[0012] According to the present invention, a fire-resistant lighting fixture can be realized without the need for the complicated work of installing a fire-resistant cover on the mounting surface. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view showing a lighting fixture according to an embodiment of the present invention; [Figure 2] FIG. [Figure 3] FIG. [Figure 4] This is a cross-sectional view of the lighting fixture taken along line AA. [Figure 5] FIG. 5 is an enlarged view of a portion of FIG. 4 showing the configuration of the lighting fixture. [Figure 6] FIG. BB is a cross-sectional view showing the configuration of the lighting fixture. [Figure 7] FIG. 7 is an enlarged view of a portion of FIG. 6 showing the configuration of the lighting fixture. [Figure 8] FIG. 10 is a perspective view showing a lighting fixture according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a lighting fixture 100 according to an embodiment of the present invention. In the following description, the side of the lighting fixture 100 that emits light will be referred to as the irradiation surface side of the lighting fixture 100. The side of the lighting fixture 100 that is inserted into a recessed hole H formed in a mounting portion C of the lighting fixture 100 will be referred to as the mounting surface side (opposite the irradiation surface side) of the lighting fixture 100. In addition, in the state in which the lighting fixture 100 is mounted to the mounting portion C shown in FIG. 4, the direction perpendicular to the mounting portion C will be referred to as the up-down direction of the lighting fixture 100, with the mounting surface side of the lighting fixture 100 being referred to as the upside and the direction directly below the irradiation surface side of the lighting fixture 100 being referred to as the downside. In the following description, the direction perpendicular to the up-down direction of the lighting fixture 100 will be referred to as the side of the lighting fixture 100. In addition, in the following description, a state in which the lighting fixture 100 is viewed from above will be referred to as a plan view. A state in which the lighting fixture 100 is viewed from a direction perpendicular to the up-down direction will be referred to as a side view. A cross-sectional view refers to a state in which the cross-sectional shape of the lighting fixture 100 or the like is viewed.

[0015] The lighting fixture 100 is used as a downlight, for example, and is inserted and fixed into a recessed hole H formed in a mounting portion C such as a ceiling, as shown in Fig. 4. As shown in Fig. 1, the lighting fixture 100 includes an LED module 10 as a light source, a fixture body 20 in which the LED module 10 is housed, a frame cover 24 that covers the fixture body 20, and a power supply unit 30 arranged at a distance from the fixture body 20. Note that in this embodiment, the power supply unit 30 is arranged at a distance from the fixture body 20, but this is not limiting, and the power supply unit 30 may be arranged above the fixture body 20, for example.

[0016] Fig. 2 is an exploded perspective view of the lighting fixture 100. The LED module 10 as a light source and the fixture body 20 will be described in detail with reference to Figs. The LED module 10 serving as a light source is a light source unit including a reflector 11, a module substrate 12, an insulating sheet 13, and a module panel board 14. The LED module 10 has a circular reflector 11 whose illumination surface is covered by the module panel board 14. The reflector 11 has a peripheral wall 11a on its upper surface for arranging the module substrate 12. The peripheral wall 11a is a wall for abutting the outer periphery of the module substrate 12, and a circular hole is formed on the inner surface of the peripheral wall 11a. The module substrate 12 of this embodiment is a substrate having a plurality of SMD (surface-mounted) LED elements mounted on its surface. The module substrate 12 has a power supply unit (not shown) such as a connector on the surface on which the LED elements are mounted. Module wiring 15 is connected to the power supply unit 13, thereby supplying power from a power supply unit 30 to the module substrate 12. An insulating sheet 13 is also provided on the upper surface of the module substrate 12 (the surface opposite to the surface on which the LED elements are mounted).

[0017] The module panel board 14 is a circular plate made of a light-transmitting resin material such as acrylic. The center of the module panel board 14 bulges out toward the irradiation surface. The outer edge of the module panel board 14 abuts against the outer edge of the reflector 11 on the irradiation surface side.

[0018] When the LED module 10 is attached to the fixture body 20, a seal member 16 is fitted between the fixture body 20 and the LED module 10. The seal member 16 seals the gap between the fixture body 20 and the LED module 10, and is made of an elastic material such as rubber. The seal member 16 is placed on a portion of the frame 22 that protrudes inward from the inner circumferential surface of the frame 22.

[0019] The fixture body 20 has a heat sink 21 which is a light source arrangement member for arranging the LED module 10, a frame body 22 which is covered at the top by the heat sink 21 and has an irradiation opening 23 at the bottom for irradiating light emitted from the LED module 10, and a fire-resistant frame cover 24 which covers the heat sink 21 and the part of the frame body 22 which is arranged on the embedding hole H side.

[0020] The heat sink 21 is a light source arrangement member for arranging the LED module 10, and is a member for dissipating heat generated by each component of the module substrate 12. The heat sink 21 is formed, for example, in a flat plate shape. The heat sink 21 is made of a metal material such as aluminum with high thermal conductivity to improve heat dissipation efficiency. The heat sink 21 is arranged to abut against the upper surface of the module substrate 12. The surface of the heat sink 21 on which the module substrate 12 is arranged is formed to have a flat surface to increase the contact area with the module substrate 12 in order to transfer heat generated from the light source (LED element). The heat generated by the LED element when it is lit is transferred to the heat sink 21, and the heat is dissipated. The heat sink 21 has an attachment portion 21a, and the attachment portion 21a has a fixing hole.

[0021] The frame 22 includes a cylindrical portion 22a that houses the LED module 10, an expanded diameter portion 22b that continues from the lower end of the cylindrical portion 22a, a flange 22c provided on the outer peripheral surface of the lower end of the expanded diameter portion 22b, a plurality of reinforcing portions 22d provided on the outer peripheral surfaces of the cylindrical portion 22a and the expanded diameter portion 22b, and a fixing member insertion portion 22e for inserting screws 28 that serve as fixing members. The frame 22 of this embodiment is made of a metal material such as aluminum with high thermal conductivity to improve heat dissipation efficiency. A portion of the heat generated by the LED element when it is lit is transferred to the heat sink 21 and then to the frame 22. When the ambient temperature is low, the heat transferred to the frame 22 is transferred to the surrounding air and dissipated.

[0022] An irradiation opening 23 is provided on the lower surface of the expanded diameter portion 22b of the frame body 22. When the device main body 20 is attached to the attachment portion C, the irradiation opening 23 is provided so as to be at the same height as the lower surface of the attachment portion C in the vertical direction.

[0023] The flange 22c is provided on the outer peripheral surface of the lower end of the expanded diameter portion 22b, and the outer diameter of the flange 22c is larger than the inner peripheral diameter of the embedding hole H. An outer edge portion 22f for positioning is provided at the outermost end of the flange 22c. In addition, a plurality of reinforcing portions 22d are erected from the upper surface of the flange 22c to the outer peripheral surfaces of the cylindrical portion 22a and the expanded diameter portion 22b. Two fixing member insertion portions 22e are provided on the outer peripheral surfaces of the cylindrical portion 22a and the expanded diameter portion 22b. The flange 22c has an outer edge portion 22f formed on its outer periphery, extending continuously upward from the flange 22c.

[0024] The frame cover 24 is a cylindrical member with a bottom and an upper surface. The frame cover 24 is a member that covers the heat sink 21 of the fixture body 20 and the portion of the frame body 22 that is located on the embedding hole H side, and is made of a fire-resistant material. Fire-resistant materials include metal and flame-retardant resin. The material that forms the frame cover 24 is preferably a material with high heat dissipation properties, and a metal material is more preferable. In this embodiment, the frame cover 24 is made of iron.

[0025] The frame cover 24 is formed in a substantially circular shape in a plan view. A flange 24a is provided on the outer peripheral surface of the lower end of the frame cover 24. The flange 24a is a member that is disposed on the upper surface of the flange 22c of the frame body 22. As shown in FIG. 7, the flange 24a is positioned by being disposed between the reinforcing portion 22d and the outer edge portion 22f. The outer diameter of the flange 24a is larger than the inner diameter of the embedding hole H.

[0026] Furthermore, flat portions 24b are formed in two locations on the outer peripheral surface of frame cover 24. Chamfered portions 24b are portions formed in a straight line by cutting off an arc in a plan view, and elastic member 26 is disposed on flat portions 24b. Providing flat portions 24b makes it possible to provide space for disposing elastic member 26, thereby preventing lighting fixture 1 from becoming larger.

[0027] In addition, a packing 27 is provided on the upper surface of the flange 24a of the frame cover 24. The packing 27 is formed in an annular shape and is placed between the periphery of the embedding hole H and the upper surface of the flange 24a, sealing the space between the irradiation surface side and the mounting surface side. The packing 27 is provided with a plurality of lips 27a that protrude upward from the upper surface.

[0028] As shown in Figures 1, 3, and 4, the power supply unit 30 has a fire-resistant power supply box 31. The power supply unit 30 is positioned so that the power supply box 31 is spaced apart from the fixture body 20. An end face 32 on one end of the power supply box 31 is inclined with respect to a direction perpendicular to the mounting surface. By forming the end face 32 in this manner, the power supply unit 30 is less likely to get caught on the edge of the recessed hole H when the lighting fixture 100 is inserted into the recessed hole H, making it easier to place in the space above the mounting portion C. The power supply box 31 is formed by an upper cover and a lower cover.

[0029] The power supply unit 30 is a power supply device that supplies power to the LED module 10 to light up the module substrate 12. The power supply unit 30 converts AC current supplied from an external commercial power source into a predetermined DC current, and supplies the converted current to the LED module 10. As shown in FIG. 4 , the power supply unit 30 has a power supply circuit unit 34.

[0030] The elastic member 26 is releasably engaged with the embedding hole H. When the fixture body 20 is inserted into the embedding hole H, the elastic member 26 abuts against the edge of the embedding hole H and elastically deforms, fixing the fixture body 20 to the embedding hole H. The elastic member 26 is formed by bending a strip-shaped elastic plate material such as stainless steel at its middle, and has a substantially V-shape.

[0031] The tip of one end of the elastic member 26 is fixed to the upper surface of the frame cover 24 by a fixing member, that is, a screw 28. With the elastic member 26 fixed to the frame cover 24, the other end extends so as to protrude toward the outer diameter side of the frame cover 24.

[0032] (Assembly Procedure of the LED Module 10 and the Fixture Body 20 of the Present Embodiment) An example of a procedure for installing the lighting fixture 100 of this embodiment will be described with reference to FIGS. 1, 2, and 4. FIG.

[0033] 2, the module substrate 12 is mounted on the reflector 11 by being placed so as to abut against the peripheral wall 11a provided on the upper part of the reflector 11. The LED module 10 is created by attaching a module panel board 14 to the underside of the reflector 11 on which the module substrate 12 is mounted.

[0034] The LED module 10 is stored in a frame 22 of the fixture main body 20. A seal member 16 is placed on the portion of the frame 22 that protrudes inward from the inner circumferential surface, and the outer edge of the module panel board 14 of the LED module 10 is abutted onto the seal member 16 to seal it. Next, a heat sink 21 is attached to the frame 22 that stores the LED module 10 inside. Furthermore, a frame cover 24 is attached so as to cover the heat sink 21 and the frame 22 from above.

[0035] 5, the power supply unit 30 and the module board 12 in the fixture main body 20 are connected by module wiring 15. The module wiring 15 extending from the upper surface of the module board 12 is taken out to the outside of the fixture main body 20 through an insertion portion 21b provided in the heat sink 21 and a wiring hole 24c provided in the frame cover 24. A wiring cover 24d is attached to the upper surface of the wiring hole 24c, and covers the insertion portion 21 of the heat sink 21 and the upper part of the wiring hole 24c of the frame cover 21.

[0036] Additionally, an elastic member 26 is placed and attached to a flat portion 24b provided on the outer peripheral surface of the frame cover 24. A screw 28 is inserted into the tip of one end of the elastic member 26. The screw 28 is inserted into a hole provided in the tip of the elastic member 26, a hole provided in the frame cover 24, a fixing hole provided in the heat sink 21, and a hole provided in the fixing member insertion portion 22e, and fastened. This fixes the frame body 22, the heat sink 21, the frame cover 24, and the elastic member 26 together.

[0037] 2, by fixing the frame body 22, heat sink 21, frame cover 24, and elastic member 26 with screws 28, the heat sink 21 comes into contact with the upper surface of the frame cover 24. As a result, heat conducted to the heat sink 21 is further conducted to the frame cover 24 and released to the outside. Because the frame cover 24 is made of iron, a material with good thermal conductivity, heat can be efficiently released throughout the entire frame cover 24.

[0038] (Installation procedure for the lighting fixture of this embodiment) Next, a method for mounting the assembled LED module 10, the fixture body 20, and the power supply unit 30 into the recessed hole H will be described. Electrical wires, such as power supply wires and feed wiring wires (hereinafter simply referred to as electrical wires), arranged on the upper surface of the embedding hole H provided in the mounting portion C are connected to the power supply unit 30. Next, the power supply unit 30 is inserted upward through the embedding hole H and placed on the upper surface of the mounting portion C. Next, the installer elastically deforms the two elastic members 26 so that their tips approach the frame cover 24 side, and then inserts the fixture body 20 into the embedding hole H. At this time, the elastic members 26 abut against the inner wall of the embedding hole H while still elastically deforming toward the frame cover 24. Next, the installer moves the fixture body 20 toward the mounting surface while the elastic members 26 are abutting against the embedding hole H. By moving the fixture body 20 toward the mounting surface, the tips of the elastic members 26 expand outward. With the fixture body 20 inserted into the embedding hole H, the elastic members 26 abut against the edge of the embedding hole H and elastically deform, fixing the fixture body 20 to the embedding hole H. This fixes the fixture body 20 to the mounting portion C. Furthermore, when the fixture body 20 is fixed to the mounting portion C, the multiple lips 27a of the packing 27 come into contact with the mounting surface of the mounting portion C, as shown in Figs. 6 and 7, thereby sealing the embedding hole H.

[0039] As shown in Figure 6, the opening of the recessed hole H in the mounting portion C of the lighting fixture 100 is covered with a fire-resistant frame cover 24. This prevents a fire that breaks out inside the room from spreading to the ceiling, and meets the requirements for a quasi-fire-resistant structure, which is one of the fire resistance standards for buildings. A quasi-fire-resistant structure is a structure required to suppress the spread of a normal fire; specifically, in steel-framed or wooden buildings, it is a structure that can suppress the spread of fire within the building and to neighboring houses for 30 to 60 minutes or more and maintain the building without collapsing for a certain period of time.

[0040] 7, a gap is provided between the inner surface of the frame cover 24 and the reinforcing portion 22d, which allows for more efficient insulation between the frame cover 24 and the appliance body 20.

[0041] In this way, because frame cover 24 is made of a fire-resistant metal material, by covering heat sink 21 and frame body 22 with frame cover 24, lighting fixture 100 can be installed in an installation location that requires a quasi-fireproof structure. Furthermore, because frame cover 24 is made of iron, which has high heat dissipation properties, heat conducted from heat sink 21 is efficiently dissipated by frame cover 24. In this embodiment, frame cover 24 is made of an iron plate material, but this is not limiting and frame cover 24 can also be made of a steel plate material shaped to suit various properties.

[0042] (Installation procedure for lighting fixtures according to other embodiments) Furthermore, the power supply box 31 of the power supply unit 30 may be provided so as to be stacked on the upper surface side of the frame cover 24 . As shown in Fig. 8, a flange portion 33 is provided on the underside of the power supply box 31. Fixing holes are provided in the flange portion 33, and the frame body 22, the heat sink 21, the frame cover 24, and the elastic member 26 are fixed together with screws 28. Because the power supply box 31 and the frame cover 24 are made of a fire-resistant metal material, the lighting fixture 100 can be installed in an installation location that requires a quasi-fireproof structure. Furthermore, since the power supply box 31 is made of iron, which has high heat dissipation properties, the heat conducted from the heat sink 21 is transferred to the power supply box 31 via the frame cover 24, and is dissipated efficiently. Furthermore, with this configuration, the module wiring 15 that electrically connects the LED module 10 and the power supply circuit unit 34 and the wiring hole 24c for pulling out the module wiring 15 are not exposed. This allows the length of the module wiring 15 to be set short, eliminates the need for a separate wiring cover, and reduces the number of parts.

[0043] The lighting fixture 100 according to the present embodiment described above is a recessed lighting fixture 100 that includes an LED module 10 as a light source unit, a fixture body 20 in which the LED module 10 is arranged, and a power supply unit 30 that supplies power to the LED module 10, and is mounted in a recessed hole H of a mounting portion C. The fixture body 20 includes a heat sink 21 that is a light source mounting member in which the LED module 10 is arranged, a frame body 22 having an irradiation opening 23 through which light emitted from the LED module 10 is irradiated, and a fire-resistant frame cover 24 that covers the heat sink 21 and the portion of the frame body 22 that is arranged on the recessed hole H side. By configuring it in this manner, the frame cover 24 is made of a fire-resistant metal material, so by covering the heat sink 21 and the frame body 22 with the frame cover 24, the lighting fixture 100 can be placed in an installation location where a semi-fireproof structure is required.

[0044] In this embodiment, the frame cover 24 has a flange 24a, and the outer diameter of the flange 24a is preferably larger than the inner diameter of the embedding hole H. With this configuration, the flange portion 22c of the frame body 22 and the frame cover 24 arranged on its upper surface can abut against the recessed hole H via the packing 27. Therefore, by installing the lighting fixture 100 in the recessed hole H, the recessed hole H of the mounting portion C can be covered. This prevents fire from passing through the recessed hole H of the mounting portion C, and improves the quasi-fire resistance of the recessed lighting fixture 100.

[0045] In this embodiment, the frame cover 24 is preferably provided so as to abut against the heat sink 21. With this configuration, the frame cover 24 is made of iron, which has high heat dissipation properties, and therefore the heat conducted from the heat sink 21 is efficiently dissipated by the frame cover 24.

[0046] The power supply unit 30 also has a fireproof power supply box 31 , which may be provided so as to be stacked on the upper surface side of the frame cover 24 . With this configuration, the power supply box 31 and frame cover 24 are made of a fire-resistant metal material, allowing the lighting fixture 100 to be installed in an installation location requiring a quasi-fireproof structure. Furthermore, the power supply box 31 is made of iron, which has high heat dissipation properties, so heat conducted from the heat sink 21 is efficiently dissipated via the frame cover 24. Furthermore, the module wiring 15 that electrically connects the LED module 10 and the power supply circuit unit 34 and the wiring hole 24c for pulling out the module wiring 15 are not exposed. This allows the length of the module wiring 15 to be set short, and there is no need to provide a separate wiring cover, reducing the number of parts.

[0047] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and various modifications are possible. For example, the heat sink 21 and the frame 22, which are light source arrangement members, are configured as separate members, but the present invention is not limited to this. For example, the heat sink and the frame may be integrally formed into a cylindrical shape with a bottom.

[0048] Furthermore, in the above embodiment of the present invention, the module substrate 12 having a plurality of SMD (Surface Mount Device) type LED elements mounted on its surface has been described as the light source of the lighting fixture 100. However, the light source of the lighting fixture 100 of the present invention is not limited to this, and light sources such as COB (Chip On Board) type LEDs, flat lamps (e.g., GX53 lamps), LED bulbs, and organic EL may also be used. When a flat lamp or an LED bulb (hereinafter collectively referred to as a lamp) is used as the light source, the power supply circuit unit 34 is provided inside the lamp. The module wiring 15 described in the above embodiment electrically connects the module substrate 12 and the power supply unit 30, but when a lamp is used as the light source, it is electrically connected to an external commercial power supply. Furthermore, lighting fixture 100 may be provided with functional units such as a motion sensor, an illuminance sensor, and a wireless communication unit. [Explanation of symbols]

[0049] 10 LED module (light source) 20. Instrument body 21 Heat sink (light source placement component) 22 Frame 24 Frame Cover 24a Tsuba 30 Power supply section 31 Power Box 100 lighting fixtures C Mounted part H Embedded hole

Claims

1. a light source unit; a fixture body in which the light source unit is disposed; a power supply unit that supplies power to the light source unit, and a recessed lighting fixture that is attached to a recessed hole of a mounting portion, The fixture body includes a light source arrangement member in which the light source unit is arranged; a frame body having an irradiation opening through which light emitted from the light source unit is irradiated; a fire-resistant frame cover that covers the light source positioning member and the portion of the frame body that is positioned on the embedding hole side.

2. The lighting fixture according to claim 1 , wherein the frame cover has a flange, and the outer diameter of the flange is larger than the inner diameter of the recessed hole.

3. 3. The lighting fixture according to claim 2, wherein the light source arrangement member and the frame are made of a metal material with high heat dissipation properties.

4. The lighting fixture according to claim 3 , wherein the frame cover is provided so as to abut against the light source positioning member.

5. the power supply unit has a fireproof power box, The lighting fixture according to claim 1 , wherein the power supply box is provided so as to be stacked on an upper surface side of the frame cover.

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