Lighting fixture, method for assembling lighting fixture, and elevator car

Abstract

The lighting fixture (1) includes: a light-emitting substrate (2) having a light-emitting portion (20) that emits light; a heat sink (3) having a bottom portion (3a), heat radiating fins (3c), and a cylindrical side wall portion (3b), which dissipates heat generated from the light-emitting portion (20), the light-emitting substrate (2) is disposed on the bottom portion (3a), the cylindrical side wall portion (3b) houses the light-emitting substrate (2), and the heat radiating fins (3c) are formed on the outer peripheral surface of the side wall portion (3b); a reflection member (4) that is housed in the side wall portion (3b) and is configured to surround the light-emitting portion (20) to reflect light; and a housing (6) at least a part of which is housed in the side wall portion (3b). When the direction in which the light is emitted is defined as the emission direction and the direction opposite to the emission direction is defined as the anti-emission direction, the side wall portion (3b) is formed to extend to a position on the anti-emission direction side of the bottom portion (3a), the light-emitting substrate (2) is disposed on the emission direction side of the bottom portion (3a), the reflection member (4) is disposed on the emission direction side of the light-emitting substrate (2), the housing (6) is disposed on the emission direction side of the reflection member (4), and a fastening member (7) for fastening the bottom portion (3a) and the housing (6) is disposed to pass through the reflection member (4) from the anti-emission direction side of the bottom portion (3a).

Description

Technical Field

[0001] The present invention relates to a lighting fixture, an assembling method of the lighting fixture, and an elevator car. Background Art

[0002] There is disclosed a lighting fixture including: a light-emitting part and a reflector housed inside a cylindrical fixture body; and a plurality of heat sinks integrally formed on the outer peripheral surface and the bottom surface of the fixture body (for example, refer to Patent Document 1). An LED (Light Emitting Diode) chip is mounted as a solid light-emitting element in a light-emitting module constituting the light-emitting part. The reflector is disposed opposite to the light-emitting module and has a plurality of reflecting parts that reflect light toward the emission direction and set the light distribution angle of the light to a specified angle.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2014-112567 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] However, in the technique of Patent Document 1, the light-emitting module and the reflector are fastened to the fixture body from the light emission direction side. If the light-emitting module and the reflector are to be fastened from the light anti-emission direction side in order to ensure workability during assembly, it is necessary to widen the interval between the heat sinks extending from the fixture body or make the heat sinks sparse, and there is a problem that the temperature of the light-emitting module rises due to a reduction in the heat dissipation area.

[0008] The present invention has been made to solve the above problems, and an object thereof is to provide a lighting fixture, an assembling method of the lighting fixture, and an elevator car that can ensure heat dissipation efficiency.

[0009] Means for Solving the Problems

[0010] The lighting fixture of the present invention includes: a light-emitting substrate having a light-emitting portion that emits light; a heat sink having a bottom portion, heat radiating fins, and a cylindrical side wall portion, which dissipates heat generated from the light-emitting portion, the light-emitting substrate is disposed on the bottom portion, the cylindrical side wall portion houses the light-emitting substrate, and the heat radiating fins are formed on the outer peripheral surface of the side wall portion; a reflection member that is housed in the side wall portion and is configured to surround the light-emitting portion to reflect light; and a housing, at least a part of which is housed in the side wall portion. When the direction in which the light is emitted is defined as the emission direction and the direction opposite to the emission direction is defined as the anti-emission direction, the side wall portion is formed to extend to a position on the anti-emission direction side with respect to the bottom portion, the light-emitting substrate is disposed on the emission direction side of the bottom portion, the reflection member is disposed on the emission direction side of the light-emitting substrate, the housing is disposed on the emission direction side of the reflection member, and a fastening member for fastening the bottom portion and the housing is disposed through the reflection member from the anti-emission direction side of the bottom portion.

[0011] The method for assembling the lighting fixture of the present invention is the method for assembling the lighting fixture according to the present invention. The lighting fixture has through holes penetrating from the emission direction side to the reflection direction side at corresponding positions of the light-emitting substrate, the bottom portion of the heat sink, the reflection member, and the housing respectively. The method for assembling the lighting fixture includes the following steps: inserting, in the order of the heat sink, the light-emitting substrate, the reflection member, and the housing, an assembly jig having guide pins provided at positions corresponding to the through holes, from the anti-emission direction side into the respective through holes, to combine the heat sink, the light-emitting substrate, the reflection member, and the housing; pulling out the assembly jig from the through holes of the combined heat sink, light-emitting substrate, reflection member, and housing to the anti-emission direction side; and inserting a fastening member from the anti-emission direction side of the bottom portion into the through hole of the housing in the through holes from which the assembly jig has been pulled out and while maintaining the combination of the heat sink, light-emitting substrate, reflection member, and housing, to fasten the bottom portion and the housing and fix the heat sink, light-emitting substrate, reflection member, and housing.

[0012] The elevator car of the present invention is an elevator car including a car floor portion, an elevator ceiling portion, wall portions, and door portions. The elevator car is provided with the lighting fixture according to the present invention on the elevator ceiling. The elevator ceiling portion has a top plate portion and a ceiling metal plate disposed opposite to each other, the ceiling metal plate is disposed at a position closer to the car floor portion side than the top plate portion, a space portion is formed between the top plate portion and the ceiling metal plate, and the lighting fixture is installed into the space portion from an installation hole formed in the ceiling metal plate and does not protrude from the top plate portion.

[0013] Advantages of the Invention

[0014] According to the present invention, heat dissipation efficiency can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded perspective view showing the lighting fixture according to Embodiment 1.

[0016] Figure 2It is a schematic diagram showing the lighting fixture of Embodiment 1.

[0017] Figure 3 It is a perspective view showing the lighting fixture of Embodiment 1.

[0018] Figure 4 It is an exploded perspective view showing the lighting fixture of Embodiment 1.

[0019] Figure 5 It is a schematic longitudinal sectional view showing the lighting fixture of Embodiment 1.

[0020] Figure 6 It is an exploded perspective view showing the lighting fixture of Embodiment 1.

[0021] Figure 7 It is a schematic diagram showing another lighting fixture of Embodiment 1.

[0022] Figure 8 It is an exploded perspective view showing the lighting fixture of Embodiment 2.

[0023] Figure 9 It is a schematic diagram showing the lighting fixture of Embodiment 2.

[0024] Figure 10 It is a perspective view showing the lighting fixture of Embodiment 2.

[0025] Figure 11 It is an exploded perspective view showing the lighting fixture of Embodiment 3.

[0026] Figure 12 It is a schematic diagram showing the lighting fixture of Embodiment 3.

[0027] Figure 13 It is a schematic diagram showing the elevator car of Embodiment 4.

[0028] Figure 14 It is a schematic diagram showing the ceiling of the elevator car of Embodiment 4. Detailed Embodiments

[0029] Embodiment 1

[0030] In the following drawings, there are cases where the relative dimensional relationships and shapes of the respective components are different from those of the actual lighting fixture 1. In addition, for ease of understanding, terms indicating directions and positions (such as "upper", "lower", "right", "left", "front", and "rear", etc.) are appropriately used. However, these expressions are only recorded for the convenience of explanation and do not limit the configuration and orientation of the respective components. In addition, in the following drawings, parts with the same reference numerals are the same or corresponding parts.

[0031] Figure 1 This is an exploded perspective view showing the lighting fixture 1 of Embodiment 1. Figure 2 This is a schematic diagram showing the lighting fixture 1 of Embodiment 1. In Figure 2 this figure, on the left side of the paper surface with respect to the central axis L1 of the lighting fixture 1 is a schematic longitudinal sectional view showing the lighting fixture 1, and on the right side of the paper surface is a side view showing the lighting fixture 1. Figure 3 This is a perspective view showing the lighting fixture 1 of Embodiment 1.

[0032] In Figures 1 - 3 this figure, the direction connecting the oppositely arranged mounting springs 8 (described later) is set as the X-axis, and the direction perpendicular to the X-axis is set as the Y-axis. The Z-axis represents the height direction of the lighting fixture 1. The X-axis, Y-axis, and Z-axis are perpendicular to each other respectively. The XY plane and the installation surface (such as the ceiling) where the lighting fixture 1 is installed are horizontal, and the XZ plane and YZ plane are perpendicular to the installation surface where the lighting fixture 1 is installed. The directions toward which the arrows of the X-axis, Y-axis, and Z-axis point are set as the positive directions, and are represented as +X-axis, +Y-axis, and +Z-axis respectively. The directions opposite to the directions toward which the arrows of the X-axis, Y-axis, and Z-axis point are set as the negative directions, and are represented as -X-axis, -Y-axis, and -Z-axis respectively. These are the same in the following drawings. Hereinafter, the +Z-axis direction in which light is emitted is referred to as the emission direction, and the direction opposite to the emission direction is referred to as the anti-emission direction.

[0033] The lighting fixture 1 includes a light-emitting substrate 2, a heat sink 3, a reflection member 4, and a housing 6. The lighting fixture 1 further includes a diffusion plate 5, a fastening member 7, a mounting spring 8, and a spring fastening member 9. Hereinafter, the lighting fixture 1 will be described in detail.

[0034] The light-emitting substrate 2 has a light-emitting portion 20 and a substrate 21. The light-emitting portion 20 is, for example, an SMD (Surface Mount Device). The light-emitting portion 20 is mounted on the substrate 21. The light-emitting portion 20 has an LED chip (blue LED) that emits blue light of about 440 nm to 480 nm. The light-emitting portion 20 adopts a single-chip method of white light emission by combining a blue LED and a yellow phosphor as its complementary color. On the LED chip of the light-emitting portion 20, a sealing member ([[]] Figures 1 - 3 not shown in this figure) in which a yellow phosphor is dispersed or mixed is coated or filled. A part of the blue light emitted from the LED chip excites the yellow phosphor and converts it into yellow light. The blue light is mixed with the yellow light converted from the blue light, and white light is emitted from the light-emitting portion 20.

[0035] The substrate 21 is a plate-shaped glass epoxy substrate. A circuit pattern for power supply is formed on the substrate 21. On the substrate 21, in addition to the light-emitting portion 20, diodes are also installed as required ( Figure 1components (not shown in the figure), etc. The substrate 21 is connected to a power supply via wires and connectors ( Figure 1 not shown in the figure).

[0036] The radiator 3 includes a bottom portion 3a, a cylindrical side wall portion 3b, and heat radiating fins 3c. The light emitting substrate 2 is disposed on the bottom portion 3a. The side wall portion 3b extends to a position on the side opposite to the light emitting direction with respect to the bottom portion 3a. In other words, the bottom portion 3a is disposed on the light emitting direction side with respect to the end portion on the side opposite to the light emitting direction of the side wall portion 3b. Thereby, the heat dissipation area of the lighting fixture 1 can be increased. The heat radiating fins 3c are disposed on the outer peripheral surface of the side wall portion 3b. The heat radiating fins 3c extend from the end portion on the light emitting direction side of the side wall portion 3b to the end portion on the side opposite to the light emitting direction. The heat radiating fins 3c are plate-shaped. The radiator 3 houses the light emitting substrate 2, a reflection member 4 described later, and a diffusion plate 5. The radiator 3 also houses at least a part of the housing 6. The radiator 3 is formed of aluminum.

[0037] The reflection member 4 is disposed on the light emitting direction side of the light emitting substrate 2. In the reflection member 4, the surface that reflects light is defined as a reflection surface 4a. The reflection member 4 is configured to surround the light emitting portion 20. Thereby, the reflection member 4 reflects the light emitted from the light emitting portion 20 and changes the direction of the light. The reflection member 4 is formed of ABS (Acrylonitrile butadiene styrene) resin.

[0038] The diffusion plate 5 diffuses the light emitted from the light emitting portion 20 to improve the softening of the irradiation image and the color unevenness of the irradiation surface. The diffusion plate 5 is disposed on the light emitting direction side of the light emitting substrate 2 and the reflection member 4. By disposing the diffusion plate 5, the light emitting substrate 2 can be protected. The diffusion plate 5 is formed of acrylic resin.

[0039] The housing 6 changes the direction of the light that has passed through the diffusion plate 5. The housing 6 is disposed on the light emitting direction side of the diffusion plate 5. The housing 6 is formed of ABS resin.

[0040] The mounting spring 8 is in the shape of a leaf spring. The mounting spring 8 is mounted on the outer peripheral surface of the side wall portion 3b of the radiator 3 by a spring fastening member 9. In the lighting fixture 1, a pair of mounting springs 8 are oppositely mounted on the outer peripheral surface of the side wall portion 3b. The spring fastening member 9 is disposed at a position on the light emitting direction side with respect to the end portion on the side opposite to the light emitting direction of the side wall portion 3b and at a position on the side opposite to the light emitting direction with respect to the bottom portion 3a. The mounting spring 8 is inserted into the mounting hole in a state of being bent along the outer peripheral surface of the side wall portion 3b of the radiator 3. When the mounting spring 8 is inserted into the mounting hole in the ceiling, it attempts to return to the Figure 3 shape shown by its own elastic force. Therefore, the mounting spring 8 is pressed against the inner surface of the mounting hole, and the lighting fixture 1 is fixed to the mounting hole by this force.

[0041] As Figure 2As shown, the light-emitting substrate 2, the bottom 3a of the heat sink 3, the reflection member 4, and the diffusion plate 5 each have a through-hole or a cutout (hereinafter collectively referred to as a "through-hole") at the position where the fastening member 7 passes through. The through-holes formed in the light-emitting substrate 2, the bottom 3a of the heat sink 3, the reflection member 4, and the diffusion plate 5 are provided at positions outside the reflection member 4 with respect to the reflection surface 4a.

[0042] The housing 6 has a protrusion 6a, and a nut 6b is embedded in the protrusion 6a. By inserting the fastening member 7 into the nut 6b, the light-emitting substrate 2, the heat sink 3, the reflection member 4, and the diffusion plate 5 are sandwiched and fixed from the emission direction side by the housing 6 and from the anti-emission direction side by the fastening member 7. The light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6 are fastened and positioned by the fastening member 7. By the fastening member 7, the central axis L1 of the light-emitting substrate 2 coincides with or substantially coincides with the central axes of the reflection member 4 and the housing 6. The fastening member 7 is a threaded member. As Figure 2 shown, the front end of the head of the fastening member 7 is located on the emission direction side with respect to the end on the anti-emission direction side of the side wall portion 3b. That is, the end on the anti-emission direction side of the side wall portion 3b extends to the anti-emission direction side with respect to the end on the anti-emission direction side of the fastening member 7.

[0043] Here, the assembly method of the lighting fixture 1 will be described. Figure 4 FIG. is an exploded perspective view of the lighting fixture 1 according to the first embodiment. Figure 5 FIG. is a longitudinal sectional schematic view of the lighting fixture 1 according to the first embodiment. Figure 6 FIG. is an exploded perspective view of the lighting fixture 1 according to the first embodiment.

[0044] Use Figure 4 and Figure 5The lighting fixture 1 is assembled using the assembly jig 600 shown. The assembly jig 600 has a base 600a and a guide pin 600b extending in a direction perpendicular to the direction in which the base 600a extends. The base 600a is, for example, plate-shaped. The guide pin 600b is provided at positions on the base 600a corresponding to the through-holes of the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6, respectively. When assembling the lighting fixture 1, the guide pin 600b is inserted into the through-holes of the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6, respectively. In the lighting fixture 1, since the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6 each have three through-holes, an example in which three guide pins 600b are provided is shown, but the number of guide pins 600b is not limited to this. In addition, regarding the number of guide pins 600b, as long as the central axes of the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6 can be aligned, it may be less than the number of through-holes. In addition, "aligning the central axes" includes the case where the central axes of the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6 are aligned and the case where they are substantially aligned.

[0045] First, the guide pin 600b of the assembly jig 600 is inserted into the through-holes of the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6 from the side opposite to the light-emitting direction. As Figure 4 shown, the assembly jig 600 is arranged, for example, with the base 600a of the assembly jig 600 as the bottom surface. And, as Figure 4 shown by the arrow, as long as the guide pin 600b is inserted into the respective through-holes in the order of the heat sink 3, the light-emitting substrate 2, the reflection member 4, the diffusion plate 5, and the housing 6, the heat sink 3, the light-emitting substrate 2, the reflection member 4, the diffusion plate 5, and the housing 6 can be stacked. Figure 5 The figure shows a situation in which the guide pin 600b is inserted into the through-holes of the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6, and the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6 are combined. By inserting the guide pin 600b into each through-hole, the guide pin 600b becomes a guiding member, and the central axes of the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6 can be aligned. At this time, the lighting fixture 1 can also be temporarily fixed by clamping the heat sink 3 and the housing 6 from the outer peripheral side using a temporary fixing member such as a clip, or temporary fixing portions such as concave and convex shapes that can be temporarily fixed when they are combined can be provided on the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6. Thus, as will be described later, even if the guide pin 600b of the assembly jig 600 is pulled out from each through-hole, the lighting fixture 1 can suppress the deviation of the central axes of the light-emitting substrate 2, the heat sink 3, the reflection member 4, the diffusion plate 5, and the housing 6.

[0046] Next, pull out the guide pin 600b of the assembly jig 600 from the through-holes of the combined light-emitting substrate 2, heat sink 3, reflection member 4, diffusion plate 5, and housing 6 toward the anti-emission direction side. As Figure 5 shown, for example, arrange the combined light-emitting substrate 2, heat sink 3, reflection member 4, diffusion plate 5, and housing 6 in such a way that the base 600a of the assembly jig 600 becomes the upper surface, and pull out the guide pin 600b of the assembly jig 600 from each through-hole.

[0047] Then, as Figure 6 shown, insert the fastening member 7 from the through-hole formed in the heat sink 3 into the through-hole of the housing 6 from the anti-emission direction side to fasten the heat sink 3 and the housing 6, and fix the light-emitting substrate 2, heat sink 3, reflection member 4, diffusion plate 5, and housing 6. Finally, arrange the mounting spring 8 on the side wall portion 3b of the heat sink 3 and fasten it to the heat sink 3 using the spring fastening member 9. Here, a hole portion 8a penetrating in a direction crossing the extending direction of the side wall portion 3b is provided in the mounting spring 8, and a convex portion 6c protruding outward in the direction of the housing 6 is provided on the outer periphery of the housing 6 at a position corresponding to the hole portion 8a of the mounting spring 8. By inserting the convex portion 6c of the housing 6 into the hole portion 8a of the mounting spring 8, even when the nut 6b of the embedded protrusion 6a comes off during the use of the lighting fixture 1, since the housing 6 is supported by the mounting spring 8 through the convex portion 6c, the fall of the housing 6 can be suppressed.

[0048] In this way, the lighting fixture 1 includes: a light-emitting substrate 2 having a light-emitting portion 20 that emits light; a heat sink 3 having a bottom portion 3a, heat radiating fins 3c, and a cylindrical side wall portion 3b, which dissipates heat generated from the light-emitting portion 20, the light-emitting substrate 2 is disposed on the bottom portion 3a, the cylindrical side wall portion 3b houses the light-emitting substrate 2, and the heat radiating fins 3c are formed on the outer peripheral surface of the side wall portion 3b; a reflection member 4 that is housed in the side wall portion 3b and is disposed so as to surround the light-emitting portion 20 and reflects light; and a housing 6 at least a part of which is housed in the side wall portion 3b. When the direction in which the light is emitted is defined as the emission direction and the opposite direction of the emission direction is defined as the anti-emission direction, the side wall portion 3b is formed to extend to a position on the anti-emission direction side with respect to the bottom portion 3a, the light-emitting substrate 2 is disposed on the emission direction side of the bottom portion 3a, the reflection member 4 is disposed on the emission direction side of the light-emitting substrate 2, the housing 6 is disposed on the emission direction side of the reflection member 4, and the fastening member 7 for fastening the bottom portion 3a and the housing 6 is disposed through the reflection member 4 from the anti-emission direction side of the bottom portion 3a.

[0049] According to the above structure, the lighting fixture 1 can ensure the heat dissipation efficiency.

[0050] In addition, the side wall portion 3b of the lighting fixture 1 extends to a position on the side opposite to the light emission direction with respect to the bottom portion 3a, and the front end of the head of the fastening member 7 is located on the light emission direction side with respect to the end portion of the side wall portion 3b on the side opposite to the light emission direction. Therefore, the fastening member 7 can be protected from external impacts by the side wall portion 3b. Thus, when inspecting the lighting fixture 1, even if an operator accidentally contacts the lighting fixture 1, it is difficult for the impact to be transmitted to the fastening member 7.

[0051] In addition, since the side wall portion 3b extends to a position on the side opposite to the light emission direction with respect to the bottom portion 3a, when the mounting spring 8 is mounted on the outer peripheral surface of the side wall portion 3b, the spring fastening member 9 can be fastened to a position on the side opposite to the light emission direction with respect to the bottom portion 3a. Thereby, it is possible to suppress the spring fastening member 9 from blocking the light emitted from the light emitting substrate 2 and to miniaturize the lighting fixture 1.

[0052] In addition, as described above, in the lighting fixture described in Japanese Unexamined Patent Application Publication No. 2014-112567, if the light emitting module and the reflector are to be fastened from the side opposite to the light emission direction, it is necessary to make the heat sink sparse, and there is a problem that the temperature of the light emitting module rises due to a reduction in the heat dissipation area. In this lighting fixture, if it is desired to increase the heat dissipation area, it is necessary to extend the heat sink toward the side opposite to the light emission direction, and the length (overall length) of the lighting fixture in the Z-axis direction becomes longer. However, in the lighting fixture 1, the heat dissipation efficiency can be ensured by the side wall portion 3b that extends to a position on the side opposite to the light emission direction with respect to the bottom portion 3a, and heat dissipation can be performed by the side wall portion 3b and the heat sink 3c. Therefore, compared with the above-described lighting fixture, the overall length of the lighting fixture 1 can be shortened while maintaining the heat dissipation efficiency.

[0053] In addition, the light emitting substrate 2, the bottom portion 3a of the radiator 3, the reflection member 4, and the diffusion plate 5 each have a through hole for the fastening member 7 to pass through at a position outside the reflection member 4 with respect to the reflection surface 4a of the reflection member 4. Thus, the light emitted from the light emitting portion 20 can reach the diffusion plate 5 without being blocked by the through hole. Moreover, since no member or the like is provided at a position inside the reflection member 4 with respect to the reflection surface 4a of the reflection member 4, the degree of freedom in the number or arrangement of the light emitting portions 20 of the lighting fixture 1 is high. Therefore, even when changes such as an increase or change in the number or arrangement of the light emitting portions 20 are added, the lighting fixture 1 does not need to change the shape of the reflection member 4, the mold cost can be suppressed, and various changes can be accommodated.

[0054] In addition, in the first embodiment, the lighting fixture 1 may also have a heat conductive sheet 22, which is a heat dissipating member having heat dissipation properties. Figure 7 It is a schematic diagram showing an outline of another lighting fixture 1a of the first embodiment. Figure 7 The portion of the lighting fixture 1a enclosed by the dashed line box is shown enlarged.

[0055] The heat-conducting sheet 22 is disposed between the light-emitting substrate 2 and the bottom 3a of the heat sink. The heat-conducting sheet 22 is made of a highly heat-conductive and flexible material, such as a heat-dissipating silicone sheet with a thickness of about 0.2 mm or more and 2.0 mm or less. In addition, if the surface of the heat-conducting sheet 22 has adhesiveness, it is in close contact with the surface of the light-emitting substrate 2 and the bottom 3a of the heat sink 3 respectively, so that the lighting fixture 1a can improve heat dissipation performance.

[0056] Similar to the light-emitting substrate 2, the bottom 3a of the heat sink 3, the reflection member 4, and the diffusion plate 5, the heat-conducting sheet 22 has through holes for the fastening member 7 to penetrate. In addition, by inserting the fastening member 7 into the nut 6b of the housing 6, the heat-conducting sheet 22, together with the light-emitting substrate 2, the heat sink 3, the reflection member 4, and the diffusion plate 5, is clamped and fixed from the light-emitting direction side by the housing 6 and from the opposite light-emitting direction side by the fastening member 7.

[0057] In addition, as the material of the heat-conducting sheet 22, a heat-dissipating silicone sheet is shown, but the material of the heat-conducting sheet 22 can also be a material mainly composed of acrylic or a material containing carbon fiber, etc. In addition, if the material of the heat-conducting sheet 22 is a material having the property of softening and improving the sealing property through a phase change as the temperature rises, the lighting fixture 1a can further improve the heat dissipation performance.

[0058] In addition, since the heat-conducting sheet 22 is a flexible material, it is flattened by the light-emitting substrate 2 and the bottom 3a when disposed between the light-emitting substrate 2 and the bottom 3a of the heat sink 3. At this time, if the warpage amount of the light-emitting substrate 2 is less than or equal to the compression amount of the heat-conducting sheet 22, the close contact between the bottom 3a of the heat sink 3 and the heat-conducting sheet 22 is ensured over the entire surface of the light-emitting substrate 2, and the lighting fixture 1a can ensure heat dissipation performance.

[0059] In addition, in the first embodiment, an example is shown in which the entire circumference of the cylindrical side wall portion 3b extends toward the opposite light-emitting direction side with respect to the bottom 3a, but a part of the end portion on the opposite light-emitting direction side of the side wall portion 3b may extend to a position on the opposite light-emitting direction side beyond the bottom 3a.

[0060] In addition, in the first embodiment, a lens member may be provided instead of the diffusion plate 5. The lens portion is, for example, a flat plate having a lens at a position opposed to the light-emitting portion 20. By providing the lens member, the lighting fixture 1 can converge the light emitted from the light-emitting portion 20 and can control the light distribution of the lighting fixture 1.

[0061] Embodiment 2

[0062] Figure 8 is an exploded perspective view showing the lighting fixture 10 of the second embodiment. Figure 9 is a schematic diagram showing the lighting fixture 10 of the second embodiment. In Figure 9In [the figure], on the left side of the central axis L1 of the lighting fixture 10 with respect to the paper surface is a schematic longitudinal sectional view showing the lighting fixture 10, and on the right side of the paper surface is a side view showing the lighting fixture 10. Figure 10 is a perspective view showing the lighting fixture 10 of Embodiment 2.

[0063] The difference between the lighting fixture 10 and the lighting fixture 1 is that the radiator 30 has a plate-shaped heat sink 30c and a heat sink 30d (bottom heat sink) formed by extending from the heat sink 30c toward the bottom 30a. The heat sink 30d extends from the end portion on the opposite side of the light-emitting direction of the side wall portion 30b toward the center of the bottom 30a.

[0064] Moreover, the difference between the lighting fixture 10 and the lighting fixture 1 is that a part of the end portion on the opposite side of the light-emitting direction of the side wall portion 30b is formed to extend to a position on the opposite side of the light-emitting direction from the bottom 30a. At the bottom 30a, in the portion where the fastening member 7 is disposed, the heat sink 30d cannot be disposed. Therefore, in the lighting fixture 10, the end portion on the opposite side of the light-emitting direction of the side wall portion 30b between the heat sinks 30d sandwiching the fastening member 7 extends to a position on the opposite side of the light-emitting direction from the bottom 30a. At this time, the front end of the head of the fastening member 7 is located on the light-emitting direction side compared to the end portion on the opposite side of the light-emitting direction of the side wall portion 30b that extends to a position on the opposite side of the light-emitting direction from the bottom 30a. In addition, the spring fastening member 9 is disposed on the light-emitting direction side of the end portion on the opposite side of the light-emitting direction of the side wall portion 30b and on the opposite side of the light-emitting direction of the bottom 30a.

[0065] According to the above structure, the lighting fixture 10 can ensure heat dissipation efficiency.

[0066] In addition, a part of the side wall portion 30b of the lighting fixture 10 extends to a position on the opposite side of the light-emitting direction from the bottom 30a, and the front end of the head of the fastening member 7 is located on the light-emitting direction side compared to the end portion on the opposite side of the light-emitting direction of the side wall portion 30b. That is, the end portion on the opposite side of the light-emitting direction of the fastening member 7 does not protrude to a position on the opposite side of the light-emitting direction from the side wall portion 30b. Therefore, the fastening member 7 can be protected from external impacts by the side wall portion 30b.

[0067] In addition, since the side wall portion 30b extends to a position on the opposite side of the light-emitting direction from the bottom 30a, when the mounting spring 8 is mounted on the outer peripheral surface of the side wall portion 30b, the spring fastening member 9 can be fastened to a position on the opposite side of the light-emitting direction from the bottom 30a. Thereby, it is possible to suppress the spring fastening member 9 from blocking the light emitted from the light-emitting substrate 2 and to miniaturize the lighting fixture 1.

[0068] In addition, by forming the end portion on the opposite side of the light-emitting direction of the side wall portion 30b between the heat sinks 30d sandwiching the fastening member 7 to extend to a position on the opposite side of the light-emitting direction from the bottom 30a, heat dissipation efficiency can be ensured.

[0069] In addition, the lighting fixture 10 can further improve the heat dissipation efficiency by forming a heat sink 30d on the bottom 30a.

[0070] In addition, the lighting fixture 1 can ensure the heat dissipation efficiency through the side wall portion 30b extending to a position on the side opposite to the light emission direction with respect to the bottom 30a, and can dissipate heat through the side wall portion 30b and the heat sink 30c. Therefore, compared with the lighting fixture described in Japanese Unexamined Patent Application Publication No. 2014-112567 described above, the overall length of the lighting fixture 1 can be shortened while maintaining the heat dissipation efficiency.

[0071] Embodiment 3

[0072] Figure 11 FIG. is an exploded perspective view showing the lighting fixture 100 of Embodiment 3. Figure 12 FIG. is a schematic view showing the lighting fixture 100 of Embodiment 3. In Figure 12 FIG., on the left side of the paper surface with respect to the central axis L1 of the lighting fixture 100 is a schematic longitudinal sectional view showing the lighting fixture 100, and on the right side of the paper surface is a side view showing the lighting fixture 100. In Figure 11 and Figure 12 FIG., the structures denoted by the same reference numerals as Figure 1 and Figure 2 FIG. represent the same or corresponding structures, and thus detailed description thereof is omitted. Hereinafter, details of the points different from the lighting fixtures 1, 1a, and 10 in the lighting fixture 100 will be described.

[0073] In the lighting fixture 100, the light-emitting substrate 200 has a light-emitting portion 201 and a substrate 202. Here, the through-hole formed in the substrate 202 is denoted as the through-hole 202a. The light-emitting portion 201 is, for example, a COB (Chip On Board). That is, the light-emitting portion 201 directly mounts a plurality of LED chips (blue LEDs) that emit blue light of about 440 nm to 480 nm on the substrate 202, and is coated or filled with a sealing member in which a yellow phosphor is dispersed or mixed ( Figure 11 and Figure 12 not shown in the figure). A part of the blue light emitted from the LED chips excites the yellow phosphor and converts it into yellow light. The blue light is mixed with the yellow light converted from the blue light, and white light is emitted from the light-emitting portion 201.

[0074] The difference between the reflecting member 400 of the lighting fixture 100 and the reflecting member 4 is that a raised portion 400b is provided at one end of a cylindrical through hole 400a extending from the exit direction side to the anti-exit direction side, and a raised portion 400c is provided at the other end. The raised portion 400b is formed on the side of the lens 500 described later, and the raised portion 400c is formed on the side of the light-emitting substrate 200. The raised portion 400b is combined with the through hole 500a of the lens 500, and the raised portion 400c is combined with the through hole 202a of the light-emitting substrate 200. Thus, the central axis of the light-emitting substrate 200 and the central axis of the lens 500 are positioned by the reflecting member 400.

[0075] The difference between the lighting fixture 100 and the lighting fixtures 1, 1a, and 10 is that instead of the diffusion plate 5, a lens 500, such as a Fresnel lens, is provided. The lens 500 is disposed on the exit direction side of the reflecting member 400. The reflecting member 400 and the lens 500 are formed of, for example, an acrylic resin.

[0076] According to the above structure, the lighting fixture 100 can ensure the heat dissipation efficiency.

[0077] In addition, in the third embodiment, since the light-emitting portion 201 is provided, the area of the portion that emits light is larger than that of the light-emitting portion 20, and a large amount of light can be emitted through one light-emitting portion 201.

[0078] In addition, in order to achieve the desired optical performance, it is necessary to align the central axis of the light-emitting portion 201 with the central axis of the lens 500. However, in the third embodiment, the raised portion 400b and the raised portion 400c provided in the through hole 400a of the reflecting member 400 function as positioning portions for aligning the central axis of the light-emitting portion 201 with the central axis of the lens 500. Therefore, compared with the case where a through hole and a positioning portion are provided separately, the lighting fixture 100 can be prevented from being enlarged and the desired optical performance can be achieved.

[0079] In addition, in the third embodiment, by providing the lens 500, the light emitted from the light-emitting portion 201 can be converged, and the light distribution of the lighting fixture 100 can be controlled. Moreover, by disposing the lens 500, the lighting fixture 100 can protect the light-emitting substrate 200.

[0080] Embodiment 4

[0081] Figure 13 is a schematic diagram showing the elevator car 2000 of the fourth embodiment. Figure 14 is a schematic diagram showing the ceiling of the elevator car 2000 of the fourth embodiment (hereinafter referred to as "elevator ceiling portion 210"). The elevator car 2000 includes an elevator ceiling portion 210, a car floor portion 211, a wall portion 212, and a door portion 213.

[0082] The elevator ceiling portion 210 has a top plate portion 210a and a ceiling metal plate 210b. The top plate portion 210a and the ceiling metal plate 210b are arranged opposite to each other. A space portion is formed between the top plate portion 210a and the ceiling metal plate 210b. The ceiling metal plate 210b is arranged on the side of the car floor portion 211. The lighting fixture 1 is provided in the space portion between the top plate portion 210a and the ceiling metal plate 210b. As Figure 14 shown, the height h in the Z-axis direction of the space portion is preferably narrow, for example, about 50 mm. The lighting fixture 1 is inserted into the mounting hole 220 formed in the ceiling metal plate 210b and is supported in the mounting hole 220 by the elastic force of the mounting spring 8 against the force to open. The ceiling metal plate 210b corresponds to the above-mentioned installation surface.

[0083] For example, when the lighting fixture described in Japanese Unexamined Patent Application Publication No. 2014-112567 is provided in the space portion of the present invention, it is possible that the entire length of the fixture cannot be fully accommodated in the space portion, so a hole for the lighting fixture to pass through needs to be formed in the top plate portion. In addition, when inspecting the elevator car, since the operator works on the top plate portion, it is necessary to cover the lighting fixture to protect it so that the operator does not directly contact the lighting fixture protruding from the top plate portion.

[0084] However, since the lighting fixture 1 can shorten its overall length, the lighting fixture 1 does not protrude from the top plate portion 210a, and the lighting fixture 1 can be provided in the space portion of the elevator car 2000.

[0085] In addition, since the lighting fixture 1 can be provided without protruding from the top plate portion 210a, there is no need to form a hole in the top plate portion 210a for the lighting fixture 1 to pass through, nor is it necessary to arrange a cover covering the lighting fixture 1. Thus, the workability of the operator when working on the top plate portion 210a can be improved.

[0086] Moreover, the side wall portion 3b extends to a position on the side of the anti-emission direction beyond the bottom portion 3a, and can protect the head of the fastening member 7, so the workability of the operator when working on the top plate portion 210a can be improved.

[0087] In addition, in the fourth embodiment, an example of fixing the lighting fixture 1 to the ceiling metal plate 210b using the mounting spring 8 is shown, but it may also be a structure with a different fixing method, such as screwing the lighting fixture 1 to the ceiling metal plate 210b using fixing fittings.

[0088] In addition, in the fourth embodiment, an example of providing the lighting fixture 1 in the elevator car 2000 is shown, but it may also be the lighting fixtures 1a, 10 or 100.

[0089] In addition, in the present invention, an example of using a glass epoxy substrate as the substrate 21 is shown, but a metal substrate such as aluminum or iron may also be used, or a phenolic paper material may be used.

[0090] Furthermore, in the present invention, an example of forming the heat sink 3 using aluminum is shown, but it may also be formed of a metal or alloy having good thermal conductivity such as copper. In addition, the heat sink 3 may also be formed of a resin material having good thermal conductivity or the like.

[0091] Furthermore, in the present invention, an example of setting the heat sink 3c and the heat sink 30c to a plate shape is shown, but it is not limited thereto.

[0092] Furthermore, in the present invention, an example of the heat sink 3c extending from the end portion on the light emission direction side of the outer peripheral surface of the side wall portion 3b to the end portion on the opposite light emission direction side is shown, but the heat sink 3c may be formed on the outer peripheral surface of the side wall portion 3b in any manner. In addition, an example of the heat sink 30c extending from the end portion on the light emission direction side of the outer peripheral surface of the side wall portion 30b to the bottom portion 30a is shown, but the heat sink 30c may be formed on the outer peripheral surface of the side wall portion 30b in any manner, and the shape on the bottom portion 30a is not limited.

[0093] Furthermore, in the present invention, an example of forming the reflection member 4 from an ABS resin is shown, but for example, it may also be formed of a resin material obtained by coloring polypropylene or PBT (polybutylene terephthalate) resin or the like white. In addition, the reflection member 4 may also be formed of a metal having a high reflectivity such as aluminum.

[0094] Furthermore, in the present invention, an example of forming the diffusion plate 5 from an acrylic resin is shown, but for example, it may also be formed of a material obtained by mixing fine particles into a transparent resin material such as a polycarbonate resin and having diffusibility. In addition, the diffusion plate 5 may also be formed of a material having fine irregularities imparted to the surface of a transparent material such as an acrylic resin, a polycarbonate resin, or glass and having diffusibility. In addition, it may be configured such that the diffusion plate 5 is formed of a transparent material such as an acrylic resin, a polycarbonate resin, or glass, and a sheet having diffusibility is sandwiched between the diffusion plate 5 and the reflection member 4 or between the diffusion plate 5 and the housing 6, thereby making the diffusion plate 5 have diffusibility. Moreover, the diffusion plate 5 may be formed by placing a film having diffusibility on the surface of a transparent material such as an acrylic resin, a polycarbonate resin, or glass.

[0095] Furthermore, in the present invention, an example of forming the housing 6 from an ABS resin is shown, but for example, it may also be formed of a resin material obtained by coloring polypropylene or PBT resin or the like. In addition, the housing 6 may also be formed of a metal having a high reflectivity such as aluminum. Moreover, the surface state of the housing 6 may be smooth or may have fine irregularities for diffusing light.

[0096] In addition, in the present invention, an example is shown in which the mounting spring 8 is in the form of a leaf spring, but it may also be in the form of a wire spring.

[0097] In addition, in the present invention, an example is shown in which an LED chip is used as the light-emitting part 20 and the light-emitting part 201. However, for example, an LD (Laser Diode) chip may also be used. In addition, a light-emitting element with a large area of a single light-emitting surface may also be used.

[0098] In addition, in the present invention, an example is shown in which the light-emitting part 20 is a single-chip type that emits white light through a blue LED and a yellow phosphor. However, a single-chip type in which a blue LED, a red phosphor, and a green phosphor are mixed may also be used. Moreover, a multi-chip type in which a red LED, a green LED, and a blue LED are mixed may also be used.

[0099] In addition, in the present invention, there is no particular limitation on the arrangement of the LED chips on the light-emitting substrate 2.

[0100] In addition, in the present invention, the outer shapes of the side wall part 3b (side wall part 30b), the reflection member 4, and the housing 6, and the shape of the lighting fixture 1 may be circular, elliptical, or polygonal, without any particular limitation.

[0101] In addition, in the present invention, a heat-conducting material or an adhesive material such as heat-conducting grease or a heat-conducting sheet may be interposed between the light-emitting substrate 2 and the bottom 3a (bottom 30a). Whether to use these adhesive materials may be determined according to the heat-resistant temperature, lifespan, strength, etc. of the LED chips or circuit elements used.

[0102] In addition, in the present invention, within the scope of the invention, the various embodiments can be freely combined, or the various embodiments can be appropriately modified or omitted.

[0103] Reference Numeral Explanation

[0104] 1, 10, 100: Lighting fixture; 2, 200: Light-emitting substrate; 3, 30: Radiator; 4, 400: Reflection member; 5: Diffusion plate; 6: Housing; 7: Fastening member; 8: Mounting spring; 9: Spring fastening member; 20, 201: Light-emitting part; 21, 202: Substrate; 22: Heat-conducting sheet; 210: Elevator ceiling part; 211: Car floor part; 212: Wall part; 213: Door part; 220: Mounting hole; 500: Lens; 600: Assembly auxiliary tool; 2000: Elevator car.

Claims

1. A lighting fixture, comprising: A light-emitting substrate having a light-emitting portion that emits light; A heat sink having a bottom portion, heat radiating fins, and a cylindrical side wall portion, which dissipates heat generated from the light-emitting portion. The light-emitting substrate is disposed on the bottom portion, the cylindrical side wall portion houses the light-emitting substrate, and the heat radiating fins are formed on the outer peripheral surface of the side wall portion; A reflection member housed in the side wall portion and configured to surround the light-emitting portion to reflect the light; And A housing, at least a part of which is housed in the side wall portion, When the direction in which the light is emitted is defined as the emission direction and the direction opposite to the emission direction is defined as the anti-emission direction, the side wall portion is formed to extend to a position on the anti-emission direction side beyond the bottom portion, The light-emitting substrate is disposed on the emission direction side of the bottom portion, the reflection member is disposed on the emission direction side of the light-emitting substrate, and the housing is disposed on the emission direction side of the reflection member, A fastening member for fastening the bottom portion and the housing is disposed through the reflection member from the anti-emission direction side of the bottom portion, The lighting fixture includes a mounting spring that is fastened to a position on the anti-emission direction side of the outer peripheral surface of the side wall portion beyond the bottom portion and fixes the lighting fixture to a mounting hole on a mounting surface, The mounting spring has a hole portion that penetrates in a direction intersecting the direction in which the side wall portion extends, and the housing has a convex portion that protrudes outward from the housing at a position corresponding to the hole portion of the mounting spring, The convex portion is inserted into the hole portion of the mounting spring.

2. The lighting fixture according to claim 1, wherein The entire circumference of the end portion of the side wall portion on the anti-emission direction side extends to a position on the anti-emission direction side beyond the bottom portion.

3. The lighting fixture according to claim 1, wherein The heat sink has bottom heat radiating fins formed by extending from the heat radiating fins toward the bottom portion.

4. The lighting fixture according to any one of claims 1 to 3, wherein The lighting fixture further includes a heat dissipating member having heat dissipation properties, The heat dissipating member is sandwiched between the light-emitting substrate and the bottom portion of the heat sink.

5. The lighting fixture according to any one of claims 1 to 3, wherein The end portion of the side wall portion on the anti-emission direction side extends to a position on the anti-emission direction side beyond the end portion of the fastening member on the anti-emission direction side.

6. The lighting fixture according to any one of claims 1 to 3, wherein The lighting fixture includes a diffusion plate that is disposed on the emission direction side of the reflection member and on the anti-emission direction side of the housing to diffuse the light emitted from the light-emitting portion.

7. An assembling method of a lighting fixture, which is an assembling method of the lighting fixture according to claim 1. The lighting fixture has through holes that penetrate from the emission direction side to the reflection direction side at corresponding positions of the light-emitting substrate, the bottom portion of the heat sink, the reflection member, and the housing. The assembling method of the lighting fixture includes the following steps: Insert an assembly jig having guide pins provided at positions corresponding to the through holes into the respective through holes in the order of the radiator, the light-emitting substrate, the reflection member, and the housing from the anti-emission direction side, and combine the radiator, the light-emitting substrate, the reflection member, and the housing; Pull out the assembly jig from the through holes of the combined radiator, light-emitting substrate, reflection member, and housing toward the anti-emission direction side; And In the through holes of the combined radiator, light-emitting substrate, reflection member, and housing from which the assembly jig has been pulled out and maintained, insert a fastening member from the anti-emission direction side of the bottom into the through hole of the housing, fasten the bottom and the housing, and fix the radiator, the light-emitting substrate, the reflection member, and the housing.

8. An elevator car, comprising a car floor portion, an elevator ceiling portion, a wall portion, and a door portion, The elevator car is provided with the lighting fixture according to any one of claims 1 to 6 provided on the elevator ceiling portion, The elevator ceiling portion has a top plate portion and a ceiling metal plate arranged opposite to each other, The ceiling metal plate is arranged at a position closer to the car floor portion than the top plate portion, a space portion is formed between the top plate portion and the ceiling metal plate, the lighting fixture is provided into the space portion from an installation hole formed in the ceiling metal plate, and does not protrude from the top plate portion.

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