Lighting device

Abstract

To provide a lighting device such that a portion as an object of a regulation of a semi-fireproof structure more easily satisfies the regulation of the semi-fireproof structure even when a device body is constituted with aluminum or resin material.SOLUTION: A lighting device 1 is an embedded-type one and is installed into an opening hole formed into a ceiling material having a ceiling surface, and includes: a cylindrical device body 10 made of material at least part of which has a melting point lower than that of steel; a fixation member 60 made of steel material and including a plurality of installation springs 40 for fixing the device body into the opening hole; and a cover member 70 mounted on the fixation member 60 and having heat resistance. The cover member 70 covers at least part of the outer peripheral part of the device body 10, and at least one of the fixation member 60 and the cover member 70 covers almost the whole area of the upper part of the device body 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a lighting device, and more particularly to an embedded lighting device attached to an opening provided in a ceiling material.

Background Art

[0002] Conventionally, a ceiling-embedded lighting device including a light source, a device body to which the light source is attached, and a mounting spring for fixing the device body to an opening provided in a ceiling material has been widely known (see, for example, Patent Document 1). Such a lighting device is generally called a downlight.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When a fire occurs, the temperature inside the building rises to 800°C or higher. In order to ensure the time for people to evacuate in such an environment, a quasi-fire-resistant structure aimed at maintaining the shape of the building for a predetermined time has been defined. Since the quasi-fire-resistant structure is defined for the main structural parts against evacuation and fire prevention from the building such as floors, walls, and roofs, the regulations for the ceiling structure of the building are ambiguous.

[0005] In this context, when the device body of Patent Document 1 is made of a material other than steel, such as aluminum, the body will be placed in a temperature environment far higher than its melting point during a fire and melt, resulting in holes in the ceiling. Therefore, there is a possibility that the fire will spread from the ceiling to the floor space of the upper floor through the holes, failing to meet the criteria for the semi-fire-resistant structure of the floor surface. However, for example, when the device body has a complex shape, it may be difficult to configure the entire device body with steel. In that case, only the part that is not made of steel may melt while leaving the part made of steel, forming a partial passage for fire. Therefore, an object of the present disclosure is to provide a lighting device or the like that can more easily meet the requirements of the semi-fire-resistant structure regulations even when a part of the device body has melted in the event of a fire. Furthermore, it is possible to suppress the collapse of the installed building or, even if the building collapses, extend the time until collapse.

Means for Solving the Problems

[0006] A lighting device according to an aspect of the present disclosure is an embedded lighting device attached to an opening provided in a ceiling material having a ceiling surface. The lighting device includes a cylindrical device body at least partially composed of a material having a melting point lower than that of iron, a fixing member composed of steel and including a plurality of mounting springs for fixing the device body to the opening, and a cover member attached to the fixing member and having heat resistance. The cover member covers at least a part of the outer peripheral portion of the device body, and at least one of the fixing member and the cover member covers substantially the entire upper part of the device body.

Effects of the Invention

[0007] According to the lighting device or the like according to the present disclosure, in the ceiling-embedded lighting device, the flame-blocking performance of the ceiling during a fire can be ensured.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0009] Hereinafter, with reference to the drawings, an example of an embodiment of a lighting device according to the present disclosure will be described in detail. Note that a form formed by selectively combining each component of a plurality of embodiments and modification examples described below is included in the scope of the present disclosure.

[0010] With reference to FIGS. 1 to 4, a lighting device 1 which is an example of an embodiment will be described in detail. FIG. 1 is a perspective view of the lighting device 1 seen from above, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is an exploded perspective view of the lighting device 1.

[0011] As shown in FIGS. 1 to 3, the lighting device 1 includes a cylindrical device body 10, a lamp-type light source unit 20 attached inside the device body 10, a fixing member 50 including two mounting springs 30 for fixing the device body 10 to an opening hole 3 provided in a ceiling material 2, and a heat-resistant cover member 60. The lighting device 1 is an embedded lighting device that irradiates light downward (floor, wall, etc.) by being attached to an opening hole 3 provided in a ceiling material 2 of a building. The lighting device 1 can be attached to, for example, a ceiling material 2 in a living room, corridor, entrance of a house, or a ceiling material 2 in a public facility such as a library, a commercial facility such as a department store, an office, a store, a factory, etc.

[0012] In this specification, for convenience of explanation, as shown in each figure, the X-axis direction, Y-axis direction, and Z-axis direction are defined. That is, the ceiling surface 2A of the ceiling material 2 to which the lighting device 1 is attached is taken as the XY plane. And the direction perpendicular to the XY plane is taken as the Z-axis direction. That is, the Z-axis direction coincides with the opening direction of the opening hole 3 provided in the ceiling material 2. Also, in the lighting device, the direction in which the mounting spring 30 extends from the device main body 10 is taken as the X-axis direction, and the direction orthogonal to the X-axis direction and the Z-axis direction is taken as the Y-axis direction. Further, in the state where the lighting device 1 is attached to the ceiling material 2, the upper side in the Z-axis direction of the lighting device 1 is referred to as "up", and the lower side in the Z-axis direction is referred to as "down".

[0013] The lighting device 1 is attached to a ceiling material 2 that is inclined with respect to the horizontal direction and the vertical direction. That is, the opening direction (Z-axis direction) of the opening hole 3 provided in the ceiling material 2 is inclined with respect to the horizontal direction and the vertical direction. Generally, the device main body 10 constituting the lighting device 1 attached to the inclined ceiling material 2 has a more complex shape than the device main body 10 constituting the lighting device 1 attached to the horizontal ceiling material 2. Therefore, it is difficult to fabricate the device main body 10 constituting the lighting device 1 attached to the inclined ceiling material 2 using steel materials, and it is necessary to fabricate it using aluminum, aluminum alloy, or resin materials.

[0014] In this embodiment, the cylindrical device main body 10 extends so as to be inclined toward one side in the Y-axis direction with respect to the Z-axis direction. When the lighting device 1 is attached to the opening hole 3, the extending direction of the device main body 10 substantially coincides with the vertical direction. The extending direction of the device main body 10 is inclined, for example, about 20° toward one side in the Y-axis direction with respect to the Z-axis direction. In other words, the Z-axis direction is inclined about 20° with respect to the vertical direction. Hereinafter, for convenience of explanation, one side in the Y-axis direction is referred to as "front", and the other side in the Y-axis direction is referred to as "rear".

[0015] In this embodiment, the fixing member 50 includes two mounting springs 30 and a connecting member 40 that connects the two mounting springs 30 to each other. The connecting member 40 has a base portion 41 that covers substantially the entire upper portion of the apparatus main body 10, and two hanging portions 42 that extend downward from the base portion 41 and cover a part of the outer peripheral portion of the apparatus main body 10. By fixing the two mounting springs 30 to the hanging portions 42 respectively, the two mounting springs 30 are fixed to each other. Further, the base portion 41 is fixed to the apparatus main body 10 by screws 47. Thereby, the connecting member 40 and the mounting springs 30 are fixed to the apparatus main body 10.

[0016] The cover member 60 is, for example, a sheet material made of an inorganic fiber material and covers most of the outer peripheral portion of the apparatus main body 10. In this embodiment, the cover member 60 includes a first cover member 61 that covers the front side of the outer peripheral portion of the apparatus main body 10 and a second cover member 62 that covers the rear side of the outer peripheral portion of the apparatus main body 10. The cover member 60 is fixed to the hanging portion 42 of the connecting member 40 by, for example, a heat-resistant tape (not shown) or a string-like member.

[0017] The lighting device 1 is preferably used for the ceiling material 2 of a semi-fireproof building. Although it will be described in detail later, at least a part of the apparatus main body 10 constituting the lighting device 1 is made of a material having a lower melting point than iron such as aluminum. On the other hand, the fixing member 50 including the two mounting springs 30 and the connecting member 40 that fixes the two mounting springs 30 to each other is made of a steel material having a high heat-resistant temperature. Further, the cover member 60 is a heat-resistant sheet material. Thereby, even when the lighting device 1 is exposed to high temperature and the apparatus main body 10 melts during a fire, the fixing member 50 and the cover member 60 do not melt and remain in the ceiling space. Further, as described above, the outer peripheral portion and the upper portion of the apparatus main body 10 are covered by the fixing member 50 and the cover member 60. Therefore, when the apparatus main body 10 melts during a fire, the fixing member 50 and the cover member 60 block most of the opening hole 3. As a result, it is possible to suppress the spread of the flame through the opening hole 3.

[0018] Hereinafter, the structure of the lighting device 1 will be described in detail.

[0019] As shown in FIGS. 1 to 3, the lighting device 1 includes a cylindrical device body 10, a lamp-type light source unit 20 attached inside the device body 10, a fixing member 50 including two attachment springs 30 for fixing the device body 10 to the opening hole 3, and a heat-resistant cover member 60.

[0020] The device body 10 is a cylindrical body with an open lower end, and has a cylindrical wall portion 11 and a flange portion 12 provided at the periphery of the opening. As described above, the device body 10 extends along a direction inclined forward with respect to the opening direction (Z-axis direction) of the opening hole 3. The device body 10 is a cylindrical member having a substantially circular cross-section perpendicular to the vertical direction, and has a flared shape that expands in diameter toward the opening at the lower end.

[0021] Here, at least a part of the device body 10 is made of a material having a melting point lower than that of iron, for example, aluminum, an aluminum alloy, or a resin material. For example, the cylindrical wall portion 11 constituting the device body 10 is made of aluminum, an aluminum alloy, or a resin material. Since aluminum, an aluminum alloy, or a resin material has excellent workability, it can be manufactured even when the device body 10 has a complicated shape.

[0022] Examples of the resin material used for the device body 10 include polyesters such as polybutylene terephthalate (PBT). When the device body 10 is made of aluminum or an aluminum alloy, the aluminum or aluminum alloy is manufactured by press working, hand reaming, or die casting, but preferably by die casting.

[0023] As described above, the cylindrical wall portion 11 is formed along the vertical direction. The cylindrical wall portion 11 has a substantially uniform diameter in the upper region and has a shape that inclines to gradually widen radially outward toward the lower end in the lower region. Note that the lower region of the cylindrical wall portion 11 may be formed along the opening direction (Z-axis direction) of the opening hole 3. Also, the cylindrical wall portion 11 may be curved. Two insertion holes 13 into which screws 67 for fixing the fixing member 50 to the apparatus main body 10 are inserted are provided at the upper part of the cylindrical wall portion 11.

[0024] The inner surface of the cylindrical wall portion 11 facing the inside of the apparatus main body 10 serves as a reflecting surface for the light emitted from the light source unit 20. Therefore, a metal layer may be provided on the inner surface of the cylindrical wall portion 11 by vapor deposition, plating, sputtering, etc. to enhance the light reflectivity, or it may be mirror-finished by polishing or the like. Also, a white coating film containing a white pigment may be provided on the inner surface of the cylindrical wall portion 11, or a colored coating film may be provided so as to be continuous with the color of the ceiling material 2.

[0025] The flange portion 12 is an annular member provided at the periphery of the opening of the apparatus main body 10. The flange portion 12 is provided so as to project radially outward at the periphery of the opening of the apparatus main body 10. Note that at least one of the cylindrical wall portion 11 and the flange portion 12 may be provided with a mechanism for suppressing displacement of the cover member 60. For example, at least one of the cylindrical wall portion 11 and the flange portion 12 may be provided with a recess for sandwiching the cover member 60.

[0026] The light source unit 20 has, for example, a holder 21 that holds a light-emitting module (not shown), a translucent protective member 22 that engages with the holder 21 and covers the light-emitting module and the holder 21, and a control circuit (not shown) that controls the light emission of the light-emitting module. Note that the configuration of the light source unit 20 is not limited to this.

[0027] The light-emitting module is held by the holder 21 and is provided inside the lamp-type light source unit 20. The light-emitting module has, for example, a light source and a substrate on which the light source is disposed. The light-emitting element constituting the light source is preferably a semiconductor light-emitting element such as an LED (Light Emitting Diode). The light-emitting element may be encapsulated with a sealing layer containing a phosphor. In this case, part of the blue light of the light-emitting element is converted into light of a longer wavelength by the phosphor, and white light may be emitted by mixing with the remaining part of the blue light. Further, the light-emitting module may have a heat sink for diffusing the heat of the light source.

[0028] The holder 21 includes, for example, an upper holder and a lower holder. A control device including a control circuit of the light-emitting module and the like is disposed in the upper holder. Further, in the lower holder, for example, a reflector is disposed. The reflector has, for example, a flared shape that expands in diameter toward the lower end, and reflects the light emitted from the light-emitting module. In other words, the light-emitting module is disposed in the lower holder with the surface of the substrate on which the light source unit is mounted facing downward so that light is emitted from the opening at the lower end of the reflector. Note that the configuration of the holder 21 is not particularly limited as long as it can hold the light-emitting module. Also, the material of the holder 21 is not particularly limited, but from the viewpoint of workability, it is preferably made of a resin material.

[0029] The protection member 22 is, for example, an opalescent resin-made translucent member containing a filler or void for light diffusion. Alternatively, the protection member 22 may be a transparent member and may have a lens function of shaping light at the incident surface and the exit surface. The protection member 22 has a function of covering and protecting the light-emitting module held by the holder 21 and transmitting or diffusely transmitting the light emitted from the light-emitting module.

[0030] As described above, the fixing member 50 includes two mounting springs 30 and a connecting member 40 that connects the two mounting springs 30 to each other.

[0031] The mounting spring 30 is fixed to a support portion 43 provided on a hanging portion 42 of the connecting member 40. The mounting spring 30 has a leaf spring structure and extends along the X-axis direction. The lighting device 1 is fixed to the ceiling material 2 when the mounting spring 30 abuts against the periphery of the opening hole 3 in the ceiling space. Note that three or more mounting springs 30 may be provided.

[0032] The mounting spring 30 is made of steel material. In this specification, the steel material refers to steel used as an industrial material, including ordinary steel, special steel added with various elements, stainless steel, and steel materials whose surfaces are chemically or physically treated. From the viewpoint of ensuring quasi-fire resistance performance, the heat-resistant temperature of the steel material is preferably 800 °C or higher, and more preferably 900 °C or higher.

[0033] The connecting member 40 is also made of steel material like the mounting spring 30. The connecting member 40 has a base portion 41 that covers substantially the entire upper part of the device body 10, and two hanging portions 42 that extend downward from the base portion 41 and cover at least a part of the outer peripheral portion of the device body 10. In this embodiment, the base portion 41 and the hanging portions 42 are integrally formed from the same member.

[0034] As described above, the base portion 41 covers substantially the entire upper part of the device body 10. Note that covering substantially the entire upper part of the device body 10 means covering so that the upper end face of the device body 10 is not substantially exposed in a top view of the lighting device 1. More specifically, in a top view of the lighting device 1, it means that 90% or more of the area of the upper end face of the device body 10 is covered. When the area of the base portion 41 is 50% or less of the opening area of the opening hole 3, it is preferable that the projected area of the cover member 60 is 40% or more. Thereby, in the event of a fire, it is possible to further suppress the spread of the flame from the opening hole 3 to the ceiling space.

[0035] Further, the base portion 41 is inclined such that the rear side is positioned above the front side. The front side of the base portion 41 has a substantially semicircular shape. Also, the rear side of the base portion 41 has a substantially rectangular shape and extends toward the outside of the opening hole 3. And, a terminal block 70 described later is attached to the lower portion of the rear side of the base portion 41 by a screw 48.

[0036] Note that the shape of the base portion 41 is not particularly limited as long as it has a structure that covers the upper portion of the apparatus main body 10, and for example, it may be circular or rectangular. Also, the base portion 41 may be formed to be parallel to the ceiling surface 2A (see FIG. 2). The base portion 41 has two insertion holes 64 provided at positions corresponding to the insertion holes 13 of the cylindrical wall portion 11, and a screw 47 is inserted into the insertion holes 44.

[0037] Vertical portions 42 are provided on both sides of the base portion 41 in the X-axis direction. In the present embodiment, the vertical portion 42 includes a first portion 45 having one end connected to the base portion 41 and extending outward along a direction inclined with respect to the Z-axis direction, and a second portion 46 connected to the other end of the first portion 45 and extending downward along the Z-axis direction. The inclination angle of the first portion 45 with respect to the Z-axis direction is, for example, 10° or more and 45° or less. A support portion 43 for fixing the mounting spring 30 is provided in the lower region of the second portion 46. Note that the vertical portion 42 may have only the second portion 46 without having the first portion 45.

[0038] The vertical portion 42 covers a part of the outer peripheral portion of the apparatus main body 10. The covering ratio of the vertical portion 42 is not particularly limited, but for example, it is a region of 5% or more and 30% or less of the entire circumference of the outer peripheral portion of the apparatus main body 10. Note that, among the outer peripheral portion of the apparatus main body 10, the region not covered by the vertical portion 42 is covered by the cover member 60. Thereby, the outer peripheral portion of the apparatus main body 10 can be covered over the entire circumference by the vertical portion 42 and the cover member 60. As a result, since the entire opening hole 3 is covered by the base portion 41, the vertical portion 42, and the cover member 60, it is possible to further suppress the spread of fire from the opening hole 3 to the ceiling space during a fire.

[0039] The cover member 60 has heat resistance and covers at least a part of the outer peripheral portion of the apparatus main body 10. In the present embodiment, the cover member 60 includes a first cover member 61 that covers the front side of the outer peripheral portion of the apparatus main body 10 and a second cover member 62 that covers the rear side of the outer peripheral portion of the apparatus main body 10.

[0040] As described above, the apparatus main body 10 extends along a direction inclined forward with respect to the opening direction (Z-axis direction) of the opening hole 3. Therefore, the second cover member 62 is configured to be wider than the first cover member 61. Note that the cover member 60 may be configured by one member or may be configured by three or more members. By configuring the cover member 60 with a plurality of members, even when the apparatus main body 10 has a complicated shape, it becomes easy to cover the outer peripheral portion of the apparatus main body 10 with the cover member 60.

[0041] Preferably, the cover member 60 covers 70% or more of the entire circumference of the outer peripheral portion of the apparatus main body 10, more preferably 80% or more of the region, and even more preferably 90% or more of the region. By the cover member 60 covering 70% or more of the entire circumference of the outer peripheral portion of the apparatus main body 10, at the time of a fire, it is possible to suppress the flame from spreading through the opening hole 3 to the ceiling space.

[0042] In the present embodiment, the cover member 60 covers a region of the outer peripheral portion of the apparatus main body 10 that is not covered by the hanging portion 42, and the hanging portion 42 is disposed between the first cover member 61 and the second cover member 62. Note that at least one of the first cover member 61 and the second cover member 62 may cover the hanging portion 42. Also, the first cover member 61 and the second cover member 62 may be arranged so as to overlap.

[0043] Further, a cut may be provided at the upper end or the lower end of the cover member 60. By providing a cut in the cover member 60, it becomes easy to deform the cover member 60, and it becomes easy to arrange the cover member 60 on the outer peripheral portion of the apparatus main body 10 according to the shape of the apparatus main body 10.

[0044] The first cover member 61 and the second cover member 62 are fixed to the first portion 45 of the hanging portion 42 by a tape having heat resistance. From the viewpoint of ensuring quasi-fire resistance performance, the heat-resistant temperature of the tape is preferably 800 °C or higher. The type of the tape is not particularly limited, but from the viewpoint of ensuring heat resistance, for example, a silica tape can be mentioned.

[0045] Note that the fixing method of the cover member 60 is not limited to the tape, and for example, it may be fixed by a screw. Further, the fixing position of the cover member 60 is not limited to the connecting member 40, and it may be fixed to the mounting spring 30 by a tape or the like. As described above, since the mounting spring 30 is made of a steel material, it does not melt during a fire. Therefore, even when the cover member 60 is fixed to the mounting spring 30, the cover member 60 can be retained in the ceiling space during a fire.

[0046] The cover member 60 is, for example, a sheet material made of an inorganic fiber material. The sheet material made of an inorganic fiber material has flexibility. Therefore, when the sheet material is used as the cover member 60, it becomes easy to arrange the cover member 60 on the outer peripheral portion of the apparatus main body 10 in accordance with the shape of the apparatus main body 10. Note that the material of the cover member 60 is not particularly limited as long as it has heat resistance and can cover the outer peripheral portion of the apparatus main body 10, and for example, it may be made of a steel material.

[0047] Examples of the inorganic fiber material include rock wool, glass wool, and ceramic fiber. When the surface of the inorganic fiber material is heated, since it has excellent heat insulation performance, even if there is shrinkage on the surface, it takes time until the back surface is heated and shrunk. Therefore, the shape of the inorganic fiber material can be maintained for the time required for the quasi-fire resistance structure of the building.

[0048] The lighting device 1 further includes a terminal block 70. The terminal block 70 is a member to which an internal power supply line for supplying power to electronic devices and the like inside the device main body 10 and an external power supply line for supplying power from the outside are electrically connected. The terminal block 70 is attached to the lower surface on the rear side of the base portion 41.

[0049] FIG. 4 is a cross-sectional view showing a state in which the fixing member 50 and the cover member 60 are arranged on the ceiling material 2 during a fire.

[0050] As shown in FIG. 4, even when the lighting device 1 is exposed to high temperature and the device main body 10 melts during a fire, the fixing member 50 including the mounting spring 30 and the connecting member 40 and the cover member 60 do not melt. Therefore, the mounting spring 30 is fixed to the ceiling material 2 by abutting against the periphery of the opening hole 3 in the ceiling space. And since the cover member 60 is fixed to the mounting spring 30 via the connecting member 40, the mounting spring 30, the connecting member 40, and the cover member 60 can be retained in the ceiling space even during a fire.

[0051] As described above, the fixing member 50 and the cover member 60 are arranged so as to cover the outer peripheral portion and the upper portion of the device main body 10. Therefore, when the device main body 10 melts during a fire, the fixing member 50 and the cover member 60 function as a lid having a convex shape that closes most of the opening hole 3. As a result, it is possible to suppress the spread of flames through the opening hole 3.

[0052] Note that the above-described embodiment can be appropriately modified in design without impairing the object of the present disclosure. For example, the lighting device 1 may be attached to a horizontal ceiling material 2. In that case, the Z-axis direction and the vertical direction substantially coincide, and the device main body 10 extends along the Z-axis direction. The lamp-type light source unit may also be configured to incorporate a light-emitting module and a control device inside the lighting device, or the fixing member 50 in which the mounting spring 30 and the connecting member 40 are integrated may be used.

[0053] In the above-described embodiment, the upper part of the apparatus main body 10 is covered by the fixing member 50, but the upper part of the apparatus main body 10 may be covered by the cover member 60. In that case, for example, the widths (vertical lengths) of the first cover member 61 and the second cover member 62 are increased, and the first cover member 61 and the second cover member 62 are bonded to each other by tape or the like at the upper part of the apparatus main body 10, so that the cover member 60 may cover the upper part of the apparatus main body 10.

[0054] Alternatively, separately from the first cover member 61 and the second cover member 62, a third cover member for covering the upper part of the apparatus main body 10 is prepared, and the third cover member is bonded to the first cover member 61 and the second cover member 62 by tape or the like, so that the cover member 60 may cover the upper part of the apparatus main body 10. Note that when the cover member 60 covers the upper part of the apparatus main body 10, the fixing member 50 does not have to cover the upper part of the apparatus main body 10.

[0055] In the above-described embodiment, the cover member 60 is fixed to the hanging part 42 by tape or the like, but the cover member 60 may be fixed to the base part 41. Also, in the above-described embodiment, the terminal block 70 is attached to the lower surface on the rear side of the base part 41, but the attachment position of the terminal block 70 is not limited to this. The terminal block 70 may be provided, for example, on the upper surface of the base part 41. Further, in the above-described embodiment, the control device including the control circuit of the light-emitting module and the like is provided inside the holder 21 constituting the light source unit 20, but the control device may be arranged outside the holder 21.

[0056] The present disclosure will be further described by the following embodiments. Configuration 1: An embedded lighting device attached to an opening provided in a ceiling member having a ceiling surface, comprising a cylindrical device body at least partially made of a material with a melting point lower than iron, a fixing member made of steel and including a plurality of mounting springs for fixing the device body to the opening, and a cover member attached to the fixing member and having heat resistance. The cover member covers at least a part of the outer peripheral portion of the device body, and at least one of the fixing member and the cover member covers substantially the entire upper part of the device body. Configuration 2: The lighting device according to Configuration 1, wherein the cover member is a sheet material made of an inorganic fiber material. Configuration 3: The lighting device according to Configuration 1 or 2, wherein the cover member covers an area of 70% or more of the entire circumference of the outer peripheral portion of the device body. Configuration 4: The lighting device according to any one of Configurations 1 to 3, wherein the device body is covered by the fixing member and the cover member over the entire circumference of the outer peripheral portion of the device body. Configuration 5: The lighting device according to any one of Configurations 1 to 4, wherein the fixing member includes a base portion covering substantially the entire upper part of the device body and a hanging portion extending downward from the base portion and covering at least a part of the outer peripheral portion of the device body. Configuration 6: The lighting device according to Configuration 2, wherein the cover member includes a plurality of the sheet materials. Configuration 7: The lighting device according to Configuration 6, wherein the fixing member includes a base portion covering the upper part of the device body and a hanging portion extending downward from the base portion and covering at least a part of the outer peripheral portion of the device body. In a side view of the lighting device, the hanging portion is disposed between a plurality of the sheet materials. Configuration 8: The lighting device according to any one of Configurations 1 to 7, wherein the device body extends along a direction inclined with respect to the normal direction of the surface of the ceiling surface.

Explanation of Reference Numerals

[0057] 1 Lighting device, 2 Ceiling material, 3 Opening hole, 10 Device body, 11 Cylindrical wall portion, 12 Flange portion, 13 Insertion hole, 20 Light source unit, 21 Holder, 22 Protection member, 30 Mounting spring, 40 Connecting member, 41 Base portion, 42 Hanging portion, 43 Support portion, 44 Insertion hole, 45 First portion, 46 Second portion, 47, 48 Screws, 50 Fixing member, 60 Cover member, 61 First cover member, 62 Second cover member, 70 Terminal block

Claims

1. An embedded lighting device attached to an opening provided in a ceiling material having a ceiling surface, a cylindrical device body at least partially composed of a material with a melting point lower than that of iron, a fixing member composed of a steel material and including a plurality of mounting springs for fixing the device body to the opening, a cover member attached to the fixing member and having heat resistance, comprising: the cover member covers at least a part of the outer peripheral portion of the device body, at least one of the fixing member and the cover member covers substantially the entire upper part of the device body, a lighting device.

2. The lighting device according to claim 1, wherein the cover member is a sheet material composed of an inorganic fiber material.

3. The lighting device according to claim 1, wherein the cover member covers a region of 70% or more of the entire circumference of the outer peripheral portion of the device body.

4. The lighting device according to claim 1, wherein the device body is covered by the fixing member and the cover member over the entire circumference of the outer peripheral portion of the device body.

5. The fixing member is: a base portion covering substantially the entire upper part of the device body, a hanging portion extending downward from the base portion and covering at least a part of the outer peripheral portion of the device body, The lighting device according to claim 1, including.

6. The lighting device according to claim 2, wherein the cover member includes a plurality of the sheet materials.

7. The fixing member is: a base portion covering substantially the entire upper part of the device body, a hanging portion extending downward from the base portion and covering at least a part of the outer peripheral portion of the device body, including, In a side view of the lighting device, the hanging portion is disposed between a plurality of the sheet materials. The lighting device according to claim 6.

8. The lighting device according to claim 1, wherein the device body extends along a direction inclined with respect to the normal direction of the surface of the ceiling surface.

Images