Lighting fixture

Abstract

To provide a lighting fixture that is light-weight and can reduce cost of manufacture in reducing the diameter of a frame body.SOLUTION: A lighting fixture 100 includes: a cylindrical frame body 70 through which light emitted from a lens 60 passes; and a fitting spring 80 for fixing the lighting fixture 100 to a ceiling embedding hole. A spring receiving metal fitting 90 for holding the fitting spring 80 is installed to an outer periphery of the frame body 70. The spring receiving metal fitting 90 includes a spring holding part 92 that is a flat-surface part having a substantially cylindrical shape and holding the fitting spring 80 to an outer peripheral surface.SELECTED DRAWING: Figure 7

Description

[Technical field]

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

[0002] As a lighting fixture, for example, a small-diameter lighting fixture (downlight) that is installed on the ceiling of a building or the like and irradiates light downward (floor, ground, wall, etc.) is known. A downlight has, for example, a lens that transmits light emitted from a light source, a cylindrical frame through which the light emitted from the lens passes, and an attachment spring for fixing the lighting fixture to a ceiling recess (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-005900 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, ceiling recesses for downlights have become smaller in diameter. However, it is desirable to avoid making the lighting fixture itself smaller in order to maintain heat dissipation. On the other hand, in downlights, a certain gap must be provided between the ceiling recess and the lighting fixture in order to insert the mounting spring into the recess.

[0005] In order to solve the above problem, it is conceivable to mold the frame of the lighting fixture by aluminum die casting, form a flat portion (a straight portion cut out of a circle in a plan view) on the outer periphery, and hold the mounting spring on the flat portion. However, a frame formed by aluminum die casting is heavy and expensive to manufacture.

[0006] Therefore, it is conceivable to form the frame by forming the frame body and the auxiliary reflector by pressing, like the frame plate of a general-purpose lighting fixture. However, it is difficult to form a flat portion on the outer circumferential surface of the frame body and a flange portion at the lower end by pressing. In other words, there is a demand for a lightweight and low manufacturing cost in order to miniaturize the frame body to accommodate small-diameter lighting fixtures.

[0007] In view of the above, an object of the present disclosure is to provide a lighting fixture that can be made lightweight and inexpensive to manufacture even when the diameter of the frame is reduced. [Means for solving the problem]

[0008] The lighting fixture of the present disclosure is a lighting fixture having a cylindrical frame body through which light emitted from a lens passes, and a mounting spring for fixing the lighting fixture to a mounting portion, and is characterized in that a spring receiver for holding the mounting spring is provided on the outer periphery of the frame body. Effect of the Invention

[0009] According to the lighting fixture of the present disclosure, the diameter of the frame can be reduced, resulting in a lighter weight and lower manufacturing costs. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view showing an overall configuration of a lighting fixture according to an embodiment; [Diagram 2] 1 is a side cross-sectional view showing an overall configuration of a lighting fixture according to an embodiment; [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 2 is another perspective view showing the heat sink. [Figure 6] FIG. 2 is an exploded perspective view showing the device body and a heat sink. [Figure 7] 4 is a perspective view showing a frame body, a spring receiving metal fitting, and a mounting spring. FIG. [Figure 8]FIG. 8 is an enlarged perspective view showing a part of FIG. [Figure 9] 4 is an exploded perspective view showing a frame body, a spring receiving metal fitting, and a mounting spring. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] A lighting device 100 as an example of an embodiment will be described below with reference to the drawings. Note that all of the embodiments described below are examples of the present disclosure. Therefore, the numerical values, components, arrangements and connection forms of the components, etc. shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Therefore, among the components in the following embodiments, components that are not described in the independent claims that represent the highest concept of the present disclosure will be described as optional components.

[0012] Note that each figure is a schematic diagram and is not necessarily a precise illustration. In each figure, the same reference numerals are used for substantially the same configurations, and duplicated explanations may be omitted or simplified. In addition, in this specification, the terms "upper" and "lower" do not necessarily refer to the upper direction (vertically upward) and the lower direction (vertically downward) in absolute spatial recognition.

[0013] [Overall configuration of lighting fixtures] The overall configuration of lighting fixture 100 will be described with reference to FIGS.

[0014] The lighting fixture 100 is, for example, a downlight that irradiates light downward (floor, ground, wall, etc.). The lighting fixture 100 is, for example, disposed on the ceiling of a building. The lighting fixture 100 of this embodiment is a ceiling recessed lighting fixture, and is disposed, for example, by being recessed into a ceiling recessing hole provided in a ceiling. The ceiling recessing hole of this embodiment is circular in plan view. The lighting fixture 100 of this embodiment is also a small-diameter lighting fixture disposed in a relatively small-diameter ceiling recessing hole (for example, 75 mmΦ). However, the lighting fixture of the present disclosure may be disposed on a mounting portion other than a ceiling. The present disclosure may also be applied to lighting fixtures other than recessed lighting fixtures and lighting fixtures other than downlights.

[0015] The lighting fixture 100 comprises a light source 10 constituted by an LED (Light Emitting Diode), a fixture body 20 to which the light source 10 is attached, a heat sink 30 provided above the fixture body 20 and configured to dissipate heat generated by the light source 10 to the outside, a holder 40 to hold the light source 10, a reflector 50 to reflect light emitted from the light source 10, a lens 60 to transmit the light emitted from the light source 10, a frame body 70 having a flange 72 through which the light emitted from the lens 60 passes, a mounting spring 80 to fix the lighting fixture 100 to a ceiling recessed hole, and a spring support bracket 90 provided on the outer periphery of the frame body 70 as a spring support device for holding the mounting spring 80.

[0016] The lighting fixture 100 also includes grease 101 as a first thermally conductive material arranged between the fixture body 20 and the heat sink 30, and a heat dissipation sheet 102 as a second thermally conductive material arranged between the light source 10 and the fixture body 20.

[0017] Furthermore, the lighting fixture 100 includes a power supply unit (not shown) for supplying power to the light source 10 for making the light source 10 emit light. The power supply unit may be disposed, for example, in the vicinity of the lighting fixture 100 above the ceiling. The power supply unit and the lighting fixture 100 are connected by a power cable 110. In the power cable 110, multiple electric wires are housed in an insulating tube.

[0018] [light source] The light source 10 will be described with reference to FIG.

[0019] As described above, the light source 10 is an LED light source constituted by, for example, an LED, and emits, for example, white light. The light source 10 is held by a holder 40 and fixed to the fixture body 20. The light source 10 has a substrate 11 and a light-emitting section 12. The light source 10 is a COB-type LED light source in which an LED is directly mounted on the substrate 11. In this embodiment, an LED is used as the light-emitting element, but other solid-state light-emitting elements such as a semiconductor light-emitting element such as a semiconductor laser, an organic EL (Electro Luminescence), or an inorganic EL may also be used as the light-emitting element.

[0020] The substrate 11 is a light source substrate on which the light emitting portion 12 is provided. The substrate 11 is a mounting substrate for mounting an LED. The substrate 11 is also a wiring substrate on which metal wiring is formed in a predetermined pattern.

[0021] The light emitting unit 12 has a plurality of LEDs mounted on the substrate 11 and a sealing member that seals the plurality of LEDs. The LED is an example of a light emitting element, and is, for example, a bare chip that emits monochromatic visible light. The LED is, for example, a blue LED chip that emits blue light when energized. For example, a plurality of LEDs are arranged in a matrix on the substrate 11. It is sufficient that at least one LED is arranged.

[0022] The sealing member may be, for example, a light-transmitting resin. The sealing member in this embodiment contains a phosphor as a wavelength conversion material that converts the wavelength of light from the LED. The sealing member may be, for example, a phosphor-containing resin in which a phosphor is dispersed in a silicone resin. When the LED is a blue LED chip that emits blue light, for example, a YAG-based yellow phosphor may be used as the phosphor particles to obtain white light.

[0023] [Main unit] The instrument body 20 will be described with reference to FIGS.

[0024] As described above, the fixture body 20 is a base on which the light source 10 held by the holder 40 described below is attached. The fixture body 20 also transfers heat generated by the light source 10 to the heat sink 30. The fixture body 20 also radiates heat generated by the light source 10 to the outside. The fixture body 20 is made of a material with high thermal conductivity such as a metal material, for example, aluminum die casting.

[0025] A recess 21 that is recessed downward is formed on the top surface of the device body 20 (the surface that abuts against the bottom plate 31 of the heat sink 30). Grease 101 is disposed on the upper surface (outer surface) of the recess 21 as a first thermal conductive material, as will be described in detail later. Furthermore, a protrusion 31A of the bottom plate 31 of the heat sink 30 is fitted into the recess 21, as will be described in detail later. Furthermore, the light source 10 (substrate 11) is provided on the lower surface (inner surface) of the recess 21 via a heat dissipation sheet 102 as a second thermal conductive material.

[0026] The heat dissipation sheet 102 as the second thermally conductive material is disposed between the light source 10 and the fixture body 20 as described above. The grease 101 and the heat dissipation sheet 102 are disposed opposite each other with the recess 21 of the fixture body 20 in between. The heat dissipation sheet 102 can improve the heat transfer performance from the light source 10 to the fixture body 20. The heat dissipation sheet 102 is, for example, a flat sheet having a constant thickness, is made of an insulating material such as an insulating resin material, and has flexibility such as rubber elasticity. The heat dissipation sheet 102 is fixed to the fixture body 20 by being held by the holder 40 together with the light source 10.

[0027] [Heat sink] The heat sink 30 will be described with reference to FIGS.

[0028] As described above, the heat sink 30 is provided above the fixture body 20 and dissipates heat generated by the light source 10 to the outside. The heat sink 30 efficiently dissipates heat generated by the light source 10 to the outside, thereby improving the heat dissipation performance of the lighting fixture 100.

[0029] The heat sink 30 is a single component integrally formed by bending a metal plate such as a steel plate, an aluminum plate, etc. However, the heat sink of the present disclosure only needs to be composed of at least one component, and may be composed of two or more components.

[0030] The heat sink 30 has a bottom plate 31 that abuts against the device body 20 that is formed in a substantially rectangular shape, a first heat sink 32 that is formed in a U-shape in a plan view, and a second heat sink 33 that is formed in a U-shape in a plan view, each of which will be described in detail later. The first heat sink 32 and the second heat sink 33 are arranged so that the first heat sink 32 and the second heat sink 33 form a substantially cylindrical shape. In the first heat sink 32 and the second heat sink 33, the narrow portion 32B that is a flat plate portion facing the first heat sink 32 and the narrow portion 33B that is a flat plate portion facing the second heat sink 33 are arranged so as to be separated by a predetermined gap, and the narrow portion 32C that is a flat plate portion facing the first heat sink 32 and the narrow portion 33C that is a flat plate portion facing the second heat sink 33 are arranged so as to be separated by a predetermined gap.

[0031] By adopting the above-mentioned configuration, in the heat sink 30, many heat sink plates can be erected in a small space, and the heat dissipation area (surface area of ​​the heat sink plate) can be increased, thereby improving the heat dissipation performance. In addition, the heat sink 30 can be molded by press processing. Therefore, compared with heat sinks molded by the conventional die casting method, the manufacturing cost can be reduced. In addition, compared with heat sinks molded by the conventional die casting method, the weight can be reduced.

[0032] Furthermore, narrow portions 32B and 33B are arranged with a predetermined gap therebetween, and narrow portions 32C and 33C are arranged with a predetermined gap therebetween, so that a tool such as a screwdriver can be moved horizontally along the gap. Therefore, for example, when fastening a screw in the center of bottom plate 31, the screwdriver can be moved horizontally in the gap between narrow portions 32B and 33B or the gap between narrow portions 32C and 33C without moving the screwdriver up and down. This allows tools to be easily moved inside heat sink 30, improving the manufacturing efficiency of lighting device 100.

[0033] The bottom plate 31 is formed in a substantially rectangular shape in a plan view. A convex portion 31A is formed in a substantially triangular shape protruding downward (toward the fixture body 20) in the substantially central portion of the bottom plate 31. The convex portion 31A fits into the concave portion 21 of the fixture body 20, as will be described in detail later. A wide portion 32A of the first heat dissipation plate 32 is formed continuously on one long side of the bottom plate 31. A wide portion 33A of the second heat dissipation plate 33 is formed continuously on the other long side of the bottom plate 31.

[0034] In addition, the bottom plate 31 is formed with a first contact portion 31B that abuts against or is adjacent to the narrow width portion 32C (main body abutment portion 32D) of the first heat dissipation plate 32. The bottom plate 31 is formed with a second contact portion 31C that abuts against or is adjacent to the narrow width portion 33B (main body abutment portion 33D) of the second heat dissipation plate 33. This forms a heat transfer path from the bottom plate 31 to one narrow width portion 32C of the first heat dissipation plate 32 and a heat transfer path from the bottom plate 31 to one narrow width portion 33B of the second heat dissipation plate 33, thereby improving the heat dissipation performance of the heat sink 30.

[0035] As described above, the first heat sink 32 is formed in a generally U-shape in plan view, and has a wide portion 32A and two opposing narrow portions 32B, 32C. The vertical length of each of the narrow portions 32B, 32C is smaller than the vertical length of the wide portion 32A, and a space is provided below each of the narrow portions 32B, 32C.

[0036] Wide portion 32A is provided at a position in lighting fixture 100 that is easily visible from the outside, and is a flat end portion having a relatively large area in lighting fixture 100. Therefore, wide portion 32A may be used as a portion to which nameplate N is affixed.

[0037] A body contact portion 32D that contacts or is close to the device body 20 is formed at the tip of the narrow width portion 32C. A bottom plate contact portion 32E that contacts or is close to the bottom plate 31 is formed at the tip of the narrow width portion 32B. This prevents the first heat dissipation plate 32 from being deformed so as to bend downward. In addition, a heat transfer path from the first heat dissipation plate 32 to the device body 20 (a heat transfer path that does not pass through the bottom plate 31) and a heat transfer path from the first heat dissipation plate 32 to the bottom plate 31 (a heat transfer path that does not pass through the continuous portion between the first heat dissipation plate 32 and the bottom plate 31) are formed, and the heat dissipation performance of the heat dissipation body 30 can be improved.

[0038] As described above, the second heat dissipation plate 33 is formed in a generally U-shape in plan view, and has a wide portion 33A and two opposing narrow portions 33B, 33C. The vertical length of each of the narrow portions 33B, 33C is smaller than the vertical length of the wide portion 33A, and a space is provided below each of the narrow portions 33B, 33C.

[0039] Wide portion 33A is provided at a position in lighting fixture 100 that is easily visible from the outside, and is a flat end portion having a relatively large area in lighting fixture 100. Therefore, wide portion 33A may be used as a portion to which nameplate N is attached.

[0040] A body contact portion 33D that contacts or is close to the device body 20 is formed at the tip of the narrow portion 33B. A bottom plate contact portion 33E that contacts or is close to the bottom plate 31 is formed at the tip of the narrow portion 33C. This prevents the second heat sink 33 from being bent downward. A heat transfer path from the second heat sink 33 to the device body 20 (a heat transfer path that does not pass through the bottom plate 31) and a heat transfer path from the second heat sink 33 to the bottom plate 31 (a heat transfer path that does not pass through the continuous portion between the second heat sink 33 and the bottom plate 31) are formed, and the heat dissipation performance of the heat sink 30 can be improved.

[0041] [First heat transfer material] Grease 101 as the first thermal conductive material will be described again with reference to FIG. 2 and FIG.

[0042] As described above, the grease 101 as the first thermal conductive material is disposed between the fixture body 20 and the heat sink 30. The thermal conductive material is also called TIM (Thermal Interface Materials), and fills the gap between the fixture body 20 and the heat sink 30 through which the heat of the light source 10 is transmitted, and promotes the cooling of the fixture body 20 by reducing the contact thermal resistance. This improves the heat transfer performance between the fixture body 20 and the heat sink 30, and improves the heat dissipation performance of the lighting fixture 100.

[0043] The grease 101 is a viscous liquid material in which thermally conductive particles such as metal powder are added to a resin such as silicone. In this embodiment, the grease 101 is used as the first thermally conductive material, but the first thermally conductive material of the present disclosure is not limited to the grease 101. As the first thermally conductive material, a thermally conductive adhesive that is an adhesive with high thermal conductivity properties, a putty with a higher viscosity than the grease 101, a PCM (Phase Change Material) that changes into a solid or liquid depending on the temperature, "solder" that melts at a relatively low temperature, a thermally conductive sheet that is a sheet-shaped resin material filled with a thermally conductive filler, or the like may be used.

[0044] The first thermally conductive material is preferably a liquid material. If the first thermally conductive material is a liquid material when the lighting device 100 is manufactured, it may become a solid material thereafter. Specifically, the first thermally conductive material is preferably grease 101, a thermally conductive adhesive, putty, or the like. This eliminates the need for dimensional design as in the case of the first thermally conductive material which is a solid material, and thus eliminates the need for dimensional management of the first thermally conductive material, thereby improving the manufacturing efficiency of the lighting device 100.

[0045] As will be described in detail later, the grease 101 is disposed between the recess 21 formed on the top surface of the fixture body 20 and the protrusion 31A of the bottom plate 31 of the heat sink 30. That is, for example, if the first thermally conductive material is a liquid material such as the grease 101, it is applied to the recess 21, so that the amount of the grease 101 applied becomes approximately uniform for each product, and the variation in the amount of the grease 101 applied can be reduced. In addition, by applying the grease 101 to the recess 21, the application work of the grease 101 can be easily performed, and therefore the manufacturing efficiency of the lighting fixture 100 can be improved.

[0046] Here, in the lighting fixture 100, the heat dissipation path from the light source 10 is formed in the order of the heat dissipation sheet 102, the recess 21 of the fixture body 20, the grease 101, and the heat sink 30. That is, in the lighting fixture 100, the heat dissipation path from the light source 10 has the grease 101 as the first heat conductive material and the heat dissipation sheet 102 as the second heat conductive material. This can improve the heat dissipation performance of the lighting fixture 100.

[0047] [Method of fixing the device body and heat sink] A method for fixing the device body 20 and the heat sink 30 will be described with reference to Figs.

[0048] The fixture body 20 and the heat sink 30 are fastened and fixed by a screw S1 as a fastener. However, the fastener of the present disclosure may be a bolt and a nut. This makes it possible to firmly fasten the fixture body 20 and the heat sink 30, improve the surface contact rate between the fixture body 20 and the grease 101 and the surface contact rate between the heat sink 30 and the grease 101, and improve the heat transfer performance from the fixture body 20 to the heat sink 30.

[0049] The fixture body 20 and the heat sink 30 are fastened together at two locations by screws S1. However, the lighting fixture of the present disclosure may be fastened together at two or more locations by screws S1.

[0050] Furthermore, in plan view, the positions fastened and fixed by the screws S1 are determined so that an imaginary line connecting the positions fastened and fixed by the screws S1 passes through the grease 101 (the convex portion 31A). As a result, the heat sink 30 presses the grease 101 evenly by fastening and fixing the screws S1, improving the surface contact rate between the device body 20 and the grease 101 and the surface contact rate between the heat sink 30 and the grease 101, thereby improving the heat transfer performance from the device body 20 to the heat sink 30.

[0051] As described above, the top surface of the fixture body 20 (the surface that abuts against the bottom plate 31 of the heat dissipation body 30) has a recess 21 that is recessed downward. The recess 21 is formed in a substantially rectangular shape in a plan view. As described above, the bottom plate 31 of the heat dissipation body 30 (the surface that abuts against the fixture body 20) has a protrusion 31A that protrudes downward. The recess 21 of the fixture body 20 is fitted with the protrusion 31A of the bottom plate 31 of the heat dissipation body 30.

[0052] With the above configuration, when attaching the heat sink 30 to the fixture body 20, the convex portion 31A of the heat sink 30 is fitted into the concave portion 21 of the fixture body 20, and the heat sink 30 can be easily positioned relative to the fixture body 20. This can improve the manufacturing efficiency of the lighting fixture 100.

[0053] As described above, the grease 101 is disposed between the recess 21 of the device body 20 and the protrusion 31A of the heat sink 30 as the first heat conductive material. However, the grease 101 may be disposed between the device body 20 and the heat sink 30 in a location other than between the recess 21 of the device body 20 and the protrusion 31A of the heat sink 30.

[0054] With the above configuration, as described above, for example, if the first thermally conductive material is a liquid material such as grease 101, the amount of grease 101 applied becomes approximately uniform for each product by applying grease 101 to recesses 21, and it is possible to reduce variation in the amount of grease 101 applied. Furthermore, when applying grease 101, recesses 21 serve as the application portion for grease 101, facilitating the application of grease 101, and therefore the manufacturing efficiency of lighting device 100 can be improved.

[0055] [Holder] The holder 40 will be described again with reference to FIG.

[0056] As described above, the holder 40 holds the light source 10 and the heat dissipation sheet 102. The holder 40 is a resin molded part made of an insulating resin material or the like. The holder 40 is fixed to the fixture body 20 by being fixed to a reflector 50 described later.

[0057] [Reflector] The reflector 50 will be described with reference to FIG.

[0058] As described above, the reflector 50 is a member that reflects the light emitted from the light source 10 and makes it incident on the lens 60. The reflector 50 is a resin molded product made of an insulating resin material or the like, for example, a white resin material. The reflector 50 is formed in a funnel shape. The reflector 50 is fixed to the device body 20 by a screw S2 (see FIG. 3). The reflector 50 also has two support parts 51 that support the lens 60.

[0059] [lens] The lens 60 will be described with reference to FIG.

[0060] As described above, the lens 60 is a light-transmitting optical member that transmits the light emitted from the light source 10. The lens 60 is also a condensing lens that condenses the light emitted from the light source 10, such as a Fresnel lens. The lens 60 is made of a light-transmitting material, such as a transparent resin material such as acrylic or polycarbonate, or a glass material.

[0061] The lens 60 is disposed so as to cover the reflector 50 disposed on the light emission side of the light source 10. Therefore, the lens 60 receives light emitted from the light source 10 that travels without being reflected by the reflector 50, and also receives light emitted from the light source 10 that is reflected by the reflector 50.

[0062] The lens 60 has two locking portions 61. The locking portions 61 are formed in a substantially L-shape and are formed facing outward at the lower end of the lens 60. The locking portions 61 pass through cutouts 73 of a frame 70 (described later) and are locked to the support portions 51 of the reflector 50. In this way, the lens 60 is fixed to the reflector 50.

[0063] [Frame] The frame 70 will be described with reference to FIGS.

[0064] As described above, the frame 70 is a cylindrical member through which the light emitted from the lens 60 passes and has a flange 72. The light from the light source 10 that has passed through the lens 60 passes through the frame 70 and is emitted to the outside of the lighting fixture 100. The frame 70 is made of a metal material such as aluminum. The frame 70 is formed by pressing. The frame 70 expands in diameter downward, and the flange 72 is formed at the lower end.

[0065] In the lighting fixture 100, in order to insert the mounting spring 80 (described later) into the ceiling mounting hole, it is necessary to provide a certain gap between the ceiling mounting hole and the lighting fixture 100. To achieve this, it was previously necessary to form a flat portion on the outer circumferential surface of the frame body, and to hold the mounting spring on the flat portion. However, in order to form the flat portion on the outer circumferential surface of the frame body and to form a flange at the lower end, it was necessary to mold the frame body by die casting.

[0066] According to the frame body 70 of this embodiment, the mounting spring 80 is held by the spring receiving metal fitting 90 described below, so there is no need to hold the mounting spring 80 by the frame body 70. Therefore, there is no need to form a flat portion for holding the mounting spring 80 on the outer circumferential surface, and the frame body 70 can be molded by press working as described above. This makes it possible to reduce the weight and manufacturing costs compared to when it is molded by die casting.

[0067] The frame 70 is formed with a main body 71, a flange portion 72, a notch 73, and a tongue portion 74, each of which will be described in detail later.

[0068] The main body 71 is formed in a funnel shape. The upper end surface of the main body 71 abuts against the top surface 91 of the spring receiving metal fitting 90, so that the frame body 70 supports the spring receiving metal fitting 90 and is positioned relative to the spring receiving metal fitting 90. This makes it easy to position the frame body 70 relative to the spring receiving metal fitting 90, thereby improving the manufacturing efficiency of the lighting device 100.

[0069] Flange portion 72 is formed at the lower end portion of main body 71. Mounting spring 80, which will be described later, is positioned relative to frame body 70 by the lower end portion of mounting spring 80 abutting against flange portion 72. This allows mounting spring 80 to be easily positioned relative to frame body 70, thereby improving the manufacturing efficiency of lighting device 100.

[0070] The notch 73 is formed at the upper end of the main body 71 at a position corresponding to the locking portion 61 of the lens 60. The locking portion 61 of the lens 60 passes through the notch 73 and is locked to the support portion 51 of the reflector 50. The locking portion 61 of the lens 60, the notch 73 and the support portion 51 of the reflector 50 are covered by a light leakage prevention portion 93 of a spring receiving metal fitting 90, which will be described later.

[0071] The tongue portion 74 is formed at the upper end of the frame body 70 so as to protrude above the frame body 70. For example, four tongue portions 74 are formed. The tongue portions 74 are formed in a short shape. The tongue portions 74 are fastened to a protrusion 95 (described later) in a notch 94 of a spring receiving metal fitting 90 (described later). This causes the frame body 70 to be fastened to the spring receiving metal fitting 90. The spring receiving metal fitting 90 is fastened to the instrument main body 20 by a screw S3 (see FIG. 3).

[0072] [Mounting spring] The mounting spring 80 will be described again with reference to FIGS.

[0073] As described above, the mounting spring 80 fixes the lighting fixture 100 to the ceiling embedding hole. In this embodiment, for example, two mounting springs 80 are provided on the spring holding portion 92 of the spring receiving metal fitting 90 described later. The mounting spring 80 is an elastic member, for example, a leaf spring made of a long metal plate. When fixing the lighting fixture 100 to the ceiling embedding hole, the flange portion 72 of the frame body 70 is engaged with the ceiling surface, and the mounting spring 80 is elastically deformed between the side surface of the frame body 70 and the inner surface of the ceiling embedding hole, and the restoring force of the mounting spring 80 is used to fix the lighting fixture 100 to the ceiling embedding hole. Note that the mounting spring 80 is positioned relative to the frame body 70 by abutting against the flange portion 72 of the frame body 70 as described above.

[0074] [Spring support bracket] The spring receiving metal fitting 90 will be described with reference to FIGS.

[0075] As described above, the spring receiving metal fitting 90 as a spring receiving device is provided on the outer periphery of the frame body 70 and holds the mounting spring 80. The spring receiving metal fitting 90 is formed from a metal material such as aluminum. The spring receiving metal fitting 90 is formed by press working. The spring receiving metal fitting 90 has a spring holding portion 92 which is a substantially annular flat portion that holds the mounting spring 80 on its outer periphery. The spring holding portion 92 is formed as a straight portion obtained by cutting out a circle in a plan view. The spring receiving metal fitting 90 is fastened and fixed to the instrument body 20 by a screw S3 (see FIG. 3).

[0076] As described above, the manufacturing cost of the spring receiving metal fitting 90 can be reduced by forming the spring receiving metal fitting 90 by press working. Also, by forming the spring receiving metal fitting 90 into a substantially cylindrical shape with the spring holding portion 92 being a flat portion on the outer circumferential surface, the mounting spring 80 can be held by the spring receiving metal fitting 90. Furthermore, by forming the frame body 70 by press working as described above, the frame body 70 can be made lighter than when it is formed by die casting. This allows the frame body (frame body 70 and spring receiving metal fitting 90) to be made lighter and at lower manufacturing costs when the diameter of the frame body is reduced to accommodate a small-diameter lighting fixture 100.

[0077] The spring receiving metal fitting 90 is formed with a top surface portion 91, a spring holding portion 92, a light leakage prevention portion 93, a notch 94, and a protrusion 95, each of which will be described in detail later.

[0078] The top surface portion 91 forms the top surface of the spring receiving metal fitting 90. As described above, the upper end surface of the main body 71 of the frame body 70 abuts against the top surface portion 91, and the frame body 70 is positioned with respect to the spring receiving metal fitting 90.

[0079] As described above, the spring holding portion 92 is a flat portion that holds the mounting spring 80. The spring holding portion 92 is formed with a pair of engagement portions 92A that engage with the mounting spring 80. The engagement portion 92A is formed in an L-shape that protrudes outward from the spring holding portion 92 and is bent toward the other engagement portion 92A in a cross-sectional view perpendicular to the vertical direction.

[0080] The light leakage prevention portion 93 covers the cutout 73 of the frame body 70 and the locking portion 61 of the lens 60. This makes it possible to prevent light leaking from the locking portion 61 of the lens 60 from leaking outside (above the ceiling). The light leakage prevention portion 93 is formed in a U-shape in a cross section perpendicular to the vertical direction. The lower end of the light leakage prevention portion 93 is the lower end of the spring receiving metal fitting 90 and does not abut against the flange portion 72 of the frame body 70. This makes it possible to prevent rattling between the lower end of the spring receiving metal fitting 90 and the frame body 70.

[0081] The notch 94 is formed in the top surface portion 91 at a position corresponding to the tongue portion 74 of the frame body 70. As described above, the tongue portion 74 of the frame body 70 is bent outward at the notch 94 and crimped to the spring receiving metal fitting 90. In this way, the frame body 70 is fixed to the spring receiving metal fitting 90.

[0082] The protrusion 95 is formed near the outer side of the cutout 94. The tongue piece portion 74 of the frame body 70 is bent and tightened at the protrusion 95. This makes it possible to prevent rattling between the tongue piece portion 74 and the spring receiving metal fitting 90 when the tongue piece portion 74 is tightened. As a result, rattling between the spring receiving metal fitting 90 and the frame body 70 can be prevented.

[0083] [summary] The present disclosure is further illustrated by the following embodiments. Configuration 1: a cylindrical frame through which the light emitted from the lens passes and which has a flange; A mounting spring for fixing the lighting fixture to the mounting part; a spring receiver provided on an outer periphery of the frame body and configured to hold the mounting spring; Equipped with Lighting fixtures. Configuration 2: 1. The lighting device according to claim 1, The spring receiver is generally cylindrical and has a flat surface on its outer circumferential surface that holds the mounting spring. Lighting fixtures. Configuration 3: 3. A lighting device according to claim 1 or 2, The lens is provided on the frame, The spring receiver is formed with a light leakage prevention portion that covers a portion of the outer peripheral surface of the frame where the lens is exposed. Lighting fixtures. Configuration 4: A lighting device according to any one of claims 1 to 3, The frame is formed with a tongue portion protruding upward, The tongue portion is crimped to a protrusion provided on a top surface of the spring receiving device. Lighting fixtures. Configuration 5: A lighting device according to any one of claims 1 to 4, The lower end of the spring receiver does not contact the frame body. Lighting fixtures.

[0084] Although the present disclosure has been described above based on the embodiments, the present disclosure is not limited to the above-mentioned embodiments. In addition, the present disclosure also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art can conceive, and forms realized by arbitrarily combining the components and functions of each embodiment within the scope of the present disclosure. [Explanation of symbols]

[0085] 10 light source, 11 board, 12 light emitting portion, 20 fixture body, 21 recess, 30 heat sink, 31 bottom plate, 31A convex portion, 32 first heat sink, 32A wide portion, 32B narrow portion, 32C narrow portion, 32D body contact portion, 32E bottom plate contact portion, 33 second heat sink, 33A wide portion, 33B narrow portion, 33C narrow portion, 33D body contact portion, 33E bottom plate contact portion, 40 holder, 50 reflector, 51 support portion, 60 lens, 61 locking portion, 70 frame body, 71 main body, 72 flange portion, 73 notch, 74 tongue portion, 80 mounting spring, 90 spring receiving bracket (spring receiving tool), 91 top surface portion, 92 Spring holding portion, 92A engagement portion, 93 light leakage prevention portion, 94 notch, 95 protrusion, 100 lighting fixture, 101 grease (first thermal conductive material), 102 heat dissipation sheet (second thermal conductive material), 110 power cable, S1 screw (fixing device), S2 screw, S3 screw

Claims

1. a cylindrical frame through which the light emitted from the lens passes and which has a flange; A mounting spring for fixing the lighting fixture to the mounting part; a spring receiver provided on an outer periphery of the frame body and configured to hold the mounting spring; Equipped with Lighting fixtures.

2. 2. A lighting device according to claim 1, The spring receiver is generally annular and has a flat surface on its outer circumferential surface that holds the mounting spring. Lighting fixtures.

3. 2. A lighting device according to claim 1, The lens is provided on the frame, The spring receiver is formed with a light leakage prevention portion that covers a portion of the outer peripheral surface of the frame where the lens is exposed. Lighting fixtures.

4. 2. A lighting device according to claim 1, The frame is formed with a tongue portion protruding upward, The tongue portion is crimped to a protrusion provided on a top surface of the spring receiving device. Lighting fixtures.

5. 2. A lighting device according to claim 1, The lower end of the spring receiver does not contact the frame body. Lighting fixtures.

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