JP7353477B2 - Lighting equipment, lighting equipment assembly method, and elevator car - Google Patents

Description

The present disclosure relates to a lighting fixture, a method of assembling a lighting fixture, and an elevator car.

A lighting device has been disclosed that includes a light emitting part and a reflector housed inside a cylindrical device main body, and a large number of heat dissipation fins that are integrally formed on the outer peripheral surface and bottom surface of the device main body (for example, the patent (See Reference 1). The light emitting module that constitutes the light emitting section has an LED (Light Emitting Diode) chip mounted thereon as a solid state light emitting element. The reflector is disposed to face the light emitting module, and has a plurality of reflecting parts that reflect light in the emission direction and set the light distribution angle to a predetermined angle.

Japanese Patent Application Publication No. 2014-112567

However, in the technology of Patent Document 1, the light emitting module and the reflector are fastened to the device body from the light emission direction side, but in order to ensure workability during assembly, the light emitting module and the reflector are If you try to fasten it from the side opposite to the light emission direction, it is necessary to widen the interval between the heat dissipation fins extending from the device body or thin out the heat dissipation fins, which causes the problem that the temperature of the light emitting module increases due to the reduction of the heat dissipation area. there were.

The present disclosure has been made in order to solve the above-mentioned problems, and aims to provide a lighting fixture, a method of assembling the lighting fixture, and an elevator car that can ensure heat dissipation efficiency.

A lighting fixture according to the present disclosure includes a light emitting board having a light emitting part that emits light, a bottom part where the light emitting board is placed, a cylindrical side wall part housing the light emitting board, and a heat radiation formed on the outer peripheral surface of the side wall part. a heat sink that has fins and radiates heat generated from the light emitting section; a reflective member that is housed in the side wall and is arranged to surround the light emitting section and reflects light; and a reflective member that is at least partially housed in the side wall. and a mounting spring for fixing the lighting fixture to the mounting hole on the installation surface, and when the direction in which light is emitted is the emission direction and the opposite direction to the emission direction is the counter-emission direction, the side wall part is the bottom part. The light emitting substrate is placed on the emission direction side of the bottom, the reflecting member is placed on the emission direction side of the light emitting substrate, and the case is formed on the emission direction side of the reflecting member. A fastening member that fastens the bottom and the case is placed through the reflective member from the side opposite to the emission direction of the bottom, and a mounting spring is fastened to the outer peripheral surface of the side wall on the side opposite to the emission direction from the bottom. The case has a convex portion that protrudes toward the outside of the case at a position corresponding to the hole of the mounting spring, and the case has a convex portion that protrudes toward the outside of the case at a position corresponding to the hole of the mounting spring. A convex portion is inserted into .

A method for assembling a lighting device according to the present disclosure is the following method for assembling a lighting device, wherein the lighting device includes a light-emitting board having a light-emitting part that emits light, a bottom portion on which the light-emitting board is arranged, and a bottom portion housing the light-emitting board. a heat sink having a cylindrical side wall portion and a heat radiation fin formed on the outer peripheral surface of the side wall portion to radiate heat generated from the light emitting portion; , comprising a reflective member that reflects light and a case at least partially housed in the side wall, and when the direction in which the light is emitted is the emission direction and the opposite direction to the emission direction is the counter-emission direction, the side wall part is formed by extending in the opposite emission direction from the bottom, the light emitting substrate is placed on the emission direction side of the bottom, the reflective member is placed on the emission direction side of the light emitting substrate, and the case A fastening member that is disposed on the side of the light-emitting substrate, that fastens the bottom and the case is disposed through the reflective member from the side of the bottom in the opposite emission direction, and is provided at corresponding positions of the light-emitting board, the bottom of the heat sink, the reflective member, and the case . , a through hole penetrating from the emission direction side to the counter emission direction side is provided, and the heat sink, the light emitting board, the reflective member, and the case are provided in the order of the through hole from the counter emission direction side at a position corresponding to the through hole. The step of assembling the heat sink, light emitting board, reflective member, and case by inserting an assembly jig with guide pins that have been assembled, and the step of assembling the heat sink, light emitting board, reflective member, and case through the through holes of the assembled heat sink, light emitting board, reflective member, and case toward the counter-emission direction side. The process of pulling out the assembly jig, and the assembly jig is pulled out from the through hole and fastened to the assembled heat sink, light emitting board, reflective member, and through hole of the case from the opposite side of the bottom to the through hole of the case. The method includes the steps of inserting the members, fastening the bottom part and the case, and fixing the heat sink, the light emitting board, the reflective member, and the case.

An elevator car according to the present disclosure is an elevator car that includes a car floor, an elevator ceiling, a wall, and a door, and includes the lighting fixture according to the present disclosure installed on the elevator ceiling, and the elevator car has a car floor. , a ceiling plate portion and a ceiling sheet metal are arranged to face each other, the ceiling plate portion is arranged closer to the car floor than the ceiling plate portion, and a space is formed between the ceiling plate portion and the ceiling sheet metal, The lighting fixture is installed in the space through a mounting hole formed in a ceiling metal plate, and does not protrude from the ceiling plate.

According to the present disclosure, heat dissipation efficiency can be ensured.

1 is an exploded perspective view showing a lighting fixture according to a first embodiment; FIG. 1 is a schematic diagram showing a lighting fixture according to Embodiment 1. FIG. 1 is a perspective view showing a lighting fixture according to Embodiment 1. FIG. 1 is an exploded perspective view showing a lighting fixture according to a first embodiment; FIG. 1 is a schematic vertical cross-sectional view showing a lighting fixture according to a first embodiment; FIG. 1 is an exploded perspective view showing a lighting fixture according to a first embodiment; FIG. 3 is a schematic diagram showing another lighting fixture according to the first embodiment. FIG. FIG. 2 is an exploded perspective view showing a lighting fixture according to a second embodiment. FIG. 3 is a schematic diagram showing a lighting fixture according to a second embodiment. FIG. 3 is a perspective view showing a lighting fixture according to a second embodiment. FIG. 3 is an exploded perspective view showing a lighting fixture according to a third embodiment. FIG. 3 is a schematic diagram showing a lighting fixture according to a third embodiment. FIG. 7 is a schematic diagram showing an elevator car according to a fourth embodiment. FIG. 7 is a schematic diagram showing the ceiling of an elevator car according to Embodiment 4;

Embodiment 1.
In the drawings shown below, the relative dimensional relationship, shape, etc. of each component may differ from the actual lighting fixture 1. Further, to facilitate understanding, terms expressing directions and positions (for example, "top", "bottom", "right", "left", "front", "back", etc.) are used as appropriate. However, these notations are only described for convenience of explanation, and do not limit the arrangement and orientation of each component. Furthermore, in the following drawings, the same reference numerals are the same or equivalent.

FIG. 1 is an exploded perspective view showing a lighting fixture 1 according to the first embodiment. FIG. 2 is a schematic diagram showing the lighting fixture 1 according to the first embodiment. In FIG. 2, the left side of the lighting fixture 1 from the center axis L1 in the paper is a schematic vertical cross-sectional view showing the lighting fixture 1, and the right side in the paper is a side view showing the lighting fixture 1. FIG. 3 is a perspective view showing the lighting fixture 1 according to the first embodiment.

In FIGS. 1 to 3, the direction in which attachment springs 8 (described later) arranged to face each other are connected is defined as the X-axis, and the direction orthogonal to the X-axis is defined as the Y-axis. The Z axis indicates the height direction of the lighting fixture 1. The X-axis, Y-axis, and Z-axis are orthogonal to each other. The XY plane and the installation surface (for example, the ceiling) on which the lighting fixture 1 is installed are horizontal, and the XZ plane and YZ plane and the installation surface on which the lighting fixture 1 is installed are perpendicular. The directions in which the arrows of the X-axis, Y-axis, and Z-axis face are defined as positive directions, and are respectively referred to as +X-axis, +Y-axis, and +Z-axis. The direction opposite to the direction in which the arrows of the X-axis, Y-axis, and Z-axis face is defined as a negative direction, and is referred to as -X-axis, -Y-axis, and -Z-axis, respectively. The same applies to the following drawings. Hereinafter, the +Z-axis direction in which light is emitted will be referred to as the emission direction, and the direction opposite to the emission direction will be referred to as the counter-emission direction.

The lighting fixture 1 includes a light emitting substrate 2, a heat sink 3, a reflective member 4, and a case 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. The details of the lighting fixture 1 will be explained below.

The light emitting substrate 2 includes a light emitting section 20 and a substrate 21. The light emitting unit 20 is, for example, an SMD (Surface Mount Device). The light emitting section 20 is mounted on the substrate 21. The light emitting unit 20 has an LED chip (blue LED) that emits blue light of approximately 440 nm to 480 nm. The light emitting unit 20 employs a single-chip system that emits white light by combining a blue LED and a yellow phosphor that is its complementary color. The LED chip of the light emitting unit 20 is coated or filled with a sealing member (not shown in FIGS. 1 to 3) in which yellow phosphor is dispersed or mixed. A portion of the blue light emitted from the LED chip excites the yellow phosphor and is converted into yellow light. The blue light and the yellow light converted from the blue light are mixed, and white light is emitted from the light emitting section 20.

The substrate 21 is a plate-shaped glass epoxy substrate. A circuit pattern for power supply is formed on the substrate 21 . In addition to the light emitting section 20, elements such as diodes (not shown in FIG. 1) are mounted on the substrate 21 as necessary. The substrate 21 is connected to a power source (not shown in FIG. 1) via wires and connectors.

The heat sink 3 includes a bottom portion 3a, a cylindrical side wall portion 3b, and radiation fins 3c. The light emitting substrate 2 is placed on the bottom 3a. The side wall portion 3b extends further in the opposite direction than the bottom portion 3a. In other words, the bottom portion 3a is located closer to the emission direction than the end of the side wall portion 3b on the side opposite to the emission direction. Thereby, the heat radiation area of the lighting fixture 1 can be increased. The radiation fins 3c are arranged on the outer peripheral surface of the side wall portion 3b. The radiation fins 3c extend from the end of the side wall 3b on the side of the emission direction to the end on the side of the opposite emission direction. The radiation fin 3c is plate-shaped. The heat sink 3 accommodates the light emitting substrate 2, a reflection member 4, which will be described later, and a diffusion plate 5. Heat sink 3 further accommodates at least a portion of case 6. The heat sink 3 is made of aluminum.

The reflective member 4 is arranged on the light emitting direction side of the light emitting substrate 2 . In the reflecting member 4, a surface that reflects light is referred to as a reflecting surface 4a. The reflective member 4 is arranged so as to surround the light emitting section 20. Thereby, the reflecting member 4 reflects the light emitted from the light emitting section 20 and changes the direction of the light. The reflective member 4 is made of ABS (acrylonitrile butadiene styrene) resin.

The diffuser plate 5 diffuses the light emitted from the light emitting unit 20 to soften the irradiated image and improve color unevenness on the irradiated surface. The diffuser plate 5 is arranged on the emission direction side of the light emitting substrate 2 and the reflecting member 4. By arranging the diffusion plate 5, the light emitting substrate 2 can be protected. Diffusion plate 5 is made of acrylic resin.

The case 6 changes the direction of the light that has passed through the diffuser plate 5. The case 6 is arranged on the side of the diffusion plate 5 in the emission direction. Case 6 is made of ABS resin.

The attachment spring 8 has a plate spring shape. The attachment spring 8 is attached to the outer peripheral surface of the side wall portion 3b of the heat sink 3 by a spring fastening member 9. In the lighting fixture 1, the pair of attachment springs 8 are attached to the outer circumferential surface of the side wall portion 3b facing each other. The spring fastening member 9 is located closer to the emission direction than the end of the side wall 3b on the side opposite to the emission direction, and is disposed closer to the side opposite to the emission direction than the bottom portion 3a. The attachment spring 8 is inserted into the attachment hole in a bent state so as to follow the outer peripheral surface of the side wall portion 3b of the heat sink 3. When the mounting spring 8 is inserted into the mounting hole in the ceiling, it tries to return to the shape shown in FIG. 3 due to its own elastic force. Therefore, the mounting spring 8 comes into pressure contact with the inner surface of the mounting hole, and the lighting fixture 1 is fixed to the mounting hole by its force.

As shown in FIG. 2, the light emitting substrate 2, the bottom 3a of the heat sink 3, the reflective member 4, and the diffusion plate 5 each have a through hole or a notch (hereinafter collectively referred to as a "through hole") at a 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 reflecting member 4, and the diffusion plate 5 are provided on the outer side of the reflecting member 4 rather than the reflecting surface 4a.

The case 6 has a boss portion 6a, and a nut 6b is inserted into the boss portion 6a. By inserting the fastening member 7 into the nut 6b, the light emitting board 2, heat sink 3, reflective member 4, and diffuser plate 5 are sandwiched by the case 6 from the emission direction side and by the fastening member 7 from the counter-emission direction side, Fixed. The light emitting board 2, heat sink 3, reflection member 4, diffusion plate 5, and case 6 are fastened and positioned by a fastening member 7. Due to the fastening member 7, the central axis L1 of the light emitting board 2 and the central axes of the reflecting member 4 and the case 6 coincide or almost coincide with each other. The fastening member 7 is a screw member. As shown in FIG. 2, the tip of the head of the fastening member 7 is located closer to the emission direction than the end of the side wall 3b on the side opposite to the emission direction. That is, the end of the side wall portion 3b on the side opposite to the emission direction extends further toward the side opposite to the emission direction than the end of the fastening member 7 on the side opposite to the emission direction.

Here, a method for assembling the lighting fixture 1 will be explained. FIG. 4 is an exploded perspective view showing the lighting fixture 1 according to the first embodiment. FIG. 5 is a schematic vertical cross-sectional view showing the lighting fixture 1 according to the first embodiment. FIG. 6 is an exploded perspective view showing the lighting fixture 1 according to the first embodiment.

The lighting fixture 1 is assembled using an assembly jig 600 shown in FIGS. 4 and 5. The assembly jig 600 includes 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 pins 600b are provided on the base 600a at positions corresponding to the respective through holes of the light emitting substrate 2, the heat sink 3, the reflective member 4, the diffusion plate 5, and the case 6. The guide pin 600b is inserted into each through hole of the light emitting board 2, heat sink 3, reflective member 4, diffuser plate 5, and case 6 when the lighting fixture 1 is assembled. In the lighting fixture 1, since the light emitting board 2, heat sink 3, reflection member 4, diffuser plate 5, and case 6 each have three through holes, an example is shown in which three guide pins 600b are used. The number of guide pins 600b is not limited to this. Further, the number of guide pins 600b may be smaller than the number of through holes as long as the central axes of the light emitting board 2, heat sink 3, reflective member 4, diffuser plate 5, and case 6 can be aligned. Note that "to make the central axes coincide" includes both cases where the central axes of the light emitting substrate 2, the heat sink 3, the reflective member 4, the diffuser plate 5, and the case 6 are coincident or almost coincident.

First, the guide pins 600b of the assembly jig 600 are inserted into the respective through holes of the light emitting substrate 2, heat sink 3, reflection member 4, diffuser plate 5, and case 6 from the side opposite to the emission direction. As shown in FIG. 4, for example, the assembly jig 600 is arranged so that the base 600a of the assembly jig 600 is the bottom surface. Then, as shown by the arrows in FIG. 4, while inserting the guide pins 600b into the through holes of the heat sink 3, the light emitting board 2, the reflecting member 4, the diffusion plate 5, and the case 6 in this order, the heat sink 3, the light emitting board 2, What is necessary is just to stack the reflecting member 4, the diffuser plate 5, and the case 6. The guide pin 600b is inserted into the through hole of the light emitting board 2, heat sink 3, reflective member 4, diffuser plate 5, and case 6, and the light emitting board 2, heat sink 3, reflective member 4, diffuser plate 5, and case 6 are combined. is shown in Figure 5. By inserting the guide pins 600b into the respective through holes, the guide pins 600b serve as guides, and the central axes of the light emitting board 2, heat sink 3, reflection member 4, diffuser plate 5, and case 6 can be aligned. At this time, in the lighting fixture 1, the heat sink 3 and the case 6 may be sandwiched between the heat sink 3 and the case 6 from the outer circumferential side with a temporary fixing tool such as a clip, or the light emitting board 2, the heat sink 3, the reflective member 4, the diffuser plate 5, and the case 6, For example, a temporary fixing part having an uneven shape may be provided, which can temporarily fix the parts when combined. As a result, even if the guide pins 600b of the assembly jig 600 are pulled out from their respective through holes, the lighting fixture 1 can be configured to include the light emitting board 2, heat sink 3, reflective member 4, diffuser plate 5, and case 6. It is possible to suppress the central axis of the center axis from shifting.

Next, the guide pin 600b of the assembly jig 600 is pulled out from the respective through holes of the combined light emitting substrate 2, heat sink 3, reflection member 4, diffuser plate 5, and case 6 in the opposite direction. As shown in FIG. 5, for example, the combined light-emitting substrate 2, heat sink 3, reflection member 4, diffuser plate 5, and case 6 are arranged so that the base 600a of the assembly jig 600 is on the top surface, and each The guide pin 600b of the assembly jig 600 may be pulled out from the through hole.

Then, as shown in FIG. 6, the fastening member 7 is inserted from the through hole formed in the heat sink 3 into the through hole of the case 6 from the side opposite to the emission direction, the heat sink 3 and the case 6 are fastened, and the light emitting board is 2. Fix the heat sink 3, reflective member 4, diffuser plate 5, and case 6. Finally, the mounting spring 8 is placed on the side wall 3b of the heat sink 3 and fastened to the heat sink 3 using the spring fastening member 9. Here, the mounting spring 8 is provided with a hole 8a that penetrates in a direction crossing the direction in which the side wall 3b extends, and on the outer periphery of the case 6, a hole 8a of the mounting spring 8 is provided at a position corresponding to the hole 8a of the mounting spring 8. A convex portion 6c protruding toward the outside of the case 6 is provided. By inserting the convex part 6c of the case 6 into the hole 8a of the mounting spring 8, even if the nut 6b inserted into the boss part 6a comes off while the lighting fixture 1 is in use, the convex part 6c can be inserted into the hole 8a of the mounting spring 8. Since the case 6 is supported by the mounting spring 8, the case 6 can be prevented from falling.

In this way, the lighting fixture 1 includes a light emitting board 2 having a light emitting part 20 that emits light, a bottom part 3a on which the light emitting board 2 is placed, a cylindrical side wall part 3b that accommodates the light emitting board 2, and a side wall part 3b. A heat sink 3 has heat radiation fins 3c formed on the outer circumferential surface of the heat sink 3, which radiates heat generated from the light emitting part 20, and a heat sink 3, which is housed in the side wall part 3b and is arranged to surround the light emitting part 20, and reflects light. It includes a reflective member 4 and a case 6, at least a part of which is accommodated in the side wall 3b, and when the direction in which light is emitted is an emission direction and the direction opposite to the emission direction is a counter-emission direction, the side wall 3b is , the light emitting board 2 is arranged on the emitting direction side of the bottom part 3a, the reflecting member 4 is arranged on the emitting direction side of the light emitting board 2, and the case 6 is A fastening member 7, which is disposed on the emission direction side of the reflecting member 4 and fastens the bottom portion 3a and the case 6, is disposed through the reflecting member 4 from the opposite emission direction side of the bottom portion 3a.

With the above-described configuration, the lighting fixture 1 can ensure heat dissipation efficiency.

Further, in the lighting fixture 1, the side wall portion 3b extends further in the opposite emission direction than the bottom portion 3a, and the tip of the head of the fastening member 7 extends further than the end portion in the opposite emission direction of the side wall portion 3b. , located on the emission direction side. Therefore, the side wall portion 3b can protect the fastening member 7 from external impact. As a result, even if a worker accidentally touches the lighting device 1 when inspecting the lighting device 1, the impact is less likely to be transmitted to the fastening member 7.

In addition, since the side wall portion 3b extends further in the counter-emission direction than the bottom portion 3a, when attaching the mounting spring 8 to the outer peripheral surface of the side wall portion 3b, the spring fastening member 9 is extended in the counter-emission direction relative to the bottom portion 3a. Can be concluded. Thereby, the spring fastening member 9 can be prevented from blocking the light emitted from the light emitting board 2, and the lighting fixture 1 can be downsized.

Furthermore, as mentioned earlier, in the lighting fixture described in JP-A No. 2014-112567, when trying to connect the light emitting module and the reflector from the side opposite to the light emission direction, it is necessary to thin out the heat dissipation fins, and the heat dissipation area There was a problem in that the temperature of the light emitting module increased due to the decrease in the amount of light. In this lighting fixture, if an attempt is made to increase the heat radiation area, it is necessary to extend the radiation fins in the opposite direction, and the length (total length) of the lighting fixture in the Z-axis direction increases. However, in the lighting fixture 1, heat dissipation efficiency is ensured by the side wall part 3b extending in the opposite direction from the bottom part 3a, and heat can be radiated by the side wall part 3b and the radiation fins 3c. The total length of the lighting fixture 1 can be shortened while maintaining heat radiation efficiency.

Further, the light emitting substrate 2, the bottom 3a of the heat sink 3, the reflecting member 4, and the diffusing plate 5 have through holes for the fastening members 7 to pass through, respectively, on the outer side of the reflecting member 4 than the reflecting surface 4a of the reflecting member 4. By having this, the light emitted from the light emitting section 20 can reach the diffusion plate 5 without being blocked by the through hole. Furthermore, since no member or the like is provided inside the reflective surface 4a of the reflective member 4, the lighting fixture 1 has a high degree of freedom in terms of the number and arrangement of the light emitting parts 20. Therefore, even if variations such as changing the number or arrangement of the light emitting parts 20 are added, the lighting fixture 1 does not need to change the shape of the reflective member 4, which can reduce mold costs and provide a variety of It can accommodate various variations.

In addition, in Embodiment 1, the lighting fixture 1 may have the heat conductive sheet 22 which is a heat dissipation member which has heat dissipation property. FIG. 7 is a schematic diagram showing another lighting fixture 1a according to the first embodiment. FIG. 7 shows an enlarged view of the portion of the lighting fixture 1a enclosed within the broken line frame.

The thermally conductive sheet 22 is placed between the light emitting substrate 2 and the bottom 3a of the heat sink. The thermally conductive sheet 22 is a highly thermally conductive and flexible material, and is, for example, a heat dissipating silicone sheet with a thickness of approximately 0.2 mm or more and 2.0 mm or less. Moreover, if the surface of the thermally conductive sheet 22 has adhesiveness, it will come into close contact with the surface of the light emitting substrate 2 and the bottom 3a of the heat sink 3, so that the lighting fixture 1a can improve heat dissipation.

The heat conductive sheet 22 has a through hole through which the fastening member 7 passes, similar to the light emitting substrate 2, the bottom 3a of the heat sink 3, the reflective member 4, and the diffusion plate 5. Further, by inserting the fastening member 7 into the nut 6b of the case 6, the heat conductive sheet 22 is connected to the light emitting board 2, the heat sink 3, and the reflective It is sandwiched and fixed together with the member 4 and the diffusion plate 5.

Although a heat dissipating silicone sheet is shown as the material of the heat conductive sheet 22, the material of the heat conductive sheet 22 may be a material containing acrylic as a main component, a material containing carbon fiber, or the like. Moreover, if the material of the thermally conductive sheet 22 is a material that has the property of softening due to a phase change as the temperature rises and improving adhesion, the lighting equipment 1a can further improve heat dissipation.

Furthermore, since the thermally conductive sheet 22 is made of a flexible material, when it is placed between the light emitting substrate 2 and the bottom 3a of the heat sink 3, it is crushed by the light emitting substrate 2 and the bottom 3a. At this time, if the amount of warpage of the light emitting board 2 is set to be less than the crushing margin of the heat conductive sheet 22, the adhesion between the bottom 3a of the heat sink 3 and the heat conductive sheet 22 can be ensured over the entire surface of the light emitting board 2. , the lighting fixture 1a can ensure heat dissipation.

Further, in the first embodiment, an example was shown in which the entire circumference of the cylindrical side wall portion 3b extends in the opposite emission direction with respect to the bottom portion 3a, but the end of the side wall portion 3b on the opposite emission direction side has been shown. A part of the portion may extend toward the opposite side of the emission direction than the bottom portion 3a.

Further, in the first embodiment, a lens member may be provided instead of the diffuser plate 5. The lens section is, for example, a flat plate having a lens at a position facing the light emitting section 20. By providing the lens member, the lighting fixture 1 can condense the light emitted from the light emitting section 20 and control the light distribution of the lighting fixture 1.

Embodiment 2.
FIG. 8 is an exploded perspective view showing the lighting fixture 10 according to the second embodiment. FIG. 9 is a schematic diagram showing a lighting fixture 10 according to the second embodiment. In FIG. 9 , the left side of the lighting fixture 10 from the central axis L1 in the paper is a schematic vertical cross-sectional view showing the lighting fixture 10, and the right side of the paper is a side view showing the lighting fixture 10. FIG. 10 is a perspective view showing a lighting fixture 10 according to the second embodiment.

The lighting fixture 10 differs from the lighting fixture 1 in that the heat sink 30 includes a plate-shaped radiation fin 30c and a radiation fin 30d (bottom radiation fin) extending from the radiation fin 30c to the bottom 30a. The radiation fin 30d extends from the end of the side wall 30b on the side opposite to the emission direction toward the center of the bottom 30a.

Furthermore, the lighting fixture 10 differs from the lighting fixture 1 in that a part of the end portion of the side wall portion 30b on the opposite side of the emission direction is formed to extend further toward the opposite side of the emission direction than the bottom portion 30a. In the bottom portion 30a, the radiation fins 30d cannot be placed in the portion where the fastening member 7 is placed. Therefore, in the lighting fixture 10, the end portion of the side wall portion 30b on the side opposite to the emission direction between the radiation fins 30d sandwiching the fastening member 7 is extended further toward the side opposite to the emission direction than the bottom portion 30a. At this time, the tip of the head of the fastening member 7 is located on the emission direction side with respect to the end portion of the side wall portion 30b on the side opposite to the emission direction, where the bottom portion 30a also extends in the side opposite to the emission direction. Further, the spring fastening member 9 is disposed on the emission direction side of the end portion of the side wall portion 30b on the side opposite to the emission direction, and on the side opposite to the emission direction of the bottom portion 30a.

With the above-described configuration, the lighting fixture 10 can ensure heat dissipation efficiency.

Further, in the lighting fixture 10, a part of the side wall portion 30b extends in the opposite direction from the bottom portion 30a, and the tip of the head of the fastening member 7 is located at the end of the side wall portion 30b in the opposite direction. It is located on the side of the emission direction than the part. That is, the end portion of the fastening member 7 on the side opposite to the emission direction does not protrude further toward the side opposite to the emission direction than the side wall portion 30b. Therefore, the side wall portion 30b can protect the fastening member 7 from external impact.

Furthermore, since the side wall portion 30b extends further in the counter-output direction than the bottom portion 30a, when attaching the mounting spring 8 to the outer peripheral surface of the side wall portion 30b, the spring fastening member 9 is extended in the counter-output direction relative to the bottom portion 30a. Can be concluded. Thereby, the spring fastening member 9 can be prevented from blocking the light emitted from the light emitting board 2, and the lighting fixture 1 can be downsized.

Further, by forming the end portion of the side wall portion 30b on the side opposite to the radiation direction between the radiation fins 30d that sandwich the fastening member 7 to extend further toward the side opposite to the radiation direction than the bottom portion 30a, heat radiation efficiency can be ensured.

Moreover, the lighting fixture 10 can further improve heat radiation efficiency by forming the radiation fins 30d on the bottom portion 30a.

Furthermore, the lighting fixture 1 ensures heat dissipation efficiency by the side wall portion 30b extending in the opposite emission direction than the bottom portion 30a, and can dissipate heat by the side wall portion 30b and the heat dissipation fins 30c. Compared to the lighting equipment described in the above, the total length of the lighting equipment 1 can be shortened while maintaining heat dissipation efficiency.

Embodiment 3.
FIG. 11 is an exploded perspective view showing the lighting fixture 100 according to the third embodiment. FIG. 12 is a schematic diagram showing a lighting fixture 100 according to the third embodiment. In FIG. 12, the left side of the lighting fixture 100 from the central axis L1 in the paper is a schematic vertical cross-sectional view showing the lighting fixture 100, and the right side in the paper is a side view showing the lighting fixture 100. In FIG. 11 and FIG. 12, components designated by the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding components, and therefore detailed description thereof will be omitted. Hereinafter, in the lighting fixture 100, details of differences from the lighting fixtures 1, 1a, and 10 will be explained.

In the lighting fixture 100, the light emitting board 200 has a light emitting section 201 and a board 202. Here, the through hole formed in the substrate 202 is referred to as a through hole 202a. The light emitting unit 201 is, for example, a COB (Chip On Board). That is, in the light emitting unit 201, a large number of LED chips (blue LEDs) that emit blue light of about 440 nm to 480 nm are mounted directly on a substrate 202, and a sealing member (see Fig. 11 and 12) is applied or filled. A portion of the blue light emitted from the LED chip excites the yellow phosphor and is converted into yellow light. The blue light and the yellow light converted from the blue light are mixed, and white light is emitted from the light emitting unit 201.

The reflective member 400 of the lighting fixture 100 has a boss portion 400b at one end of a cylindrical through hole 400a extending from the emission direction side to the counter-emission direction side, and a boss portion 400c at the other end. Different from 4. The boss portion 400b is formed on the lens 500 side, which will be described later, and the boss portion 400c is formed on the light emitting substrate 200 side. The boss portion 400b is combined with the through hole 500a of the lens 500, and the boss portion 400c is combined with the through hole 202a of the light emitting substrate 200. Thereby, the central axis of the light emitting substrate 200 and the central axis of the lens 500 are positioned by the reflecting member 400.

Lighting fixture 100 differs from lighting fixtures 1, 1a, and 10 in that it includes a lens 500, such as a Fresnel lens, instead of diffuser plate 5. The lens 500 is arranged on the side of the reflection member 400 in the emission direction. The reflective member 400 and the lens 500 are made of, for example, acrylic resin.

With the above-described configuration, the lighting fixture 100 can ensure heat dissipation efficiency.

Furthermore, in the third embodiment, since the light emitting section 201 is included, the area of the light emitting part is larger than that of the light emitting section 20, and one light emitting section 201 can emit a large amount of light.

Furthermore, in order to achieve the desired optical performance, it is necessary that the central axes of the light emitting section 201 and the lens 500 coincide; The boss portions 400b and 400c serve as positioning portions for aligning the central axis of the light emitting portion 201 and the central axis of the lens 500. Therefore, compared to the case where the through hole and the positioning part are provided separately, the lighting fixture 100 can suppress the increase in size and can achieve desired optical performance.

Furthermore, in the third embodiment, by including the lens 500, the light emitted from the light emitting section 201 can be condensed and the light distribution of the lighting fixture 100 can be controlled. Furthermore, the lighting fixture 100 can protect the light emitting substrate 200 by disposing the lens 500.

Embodiment 4.
FIG. 13 is a schematic diagram showing an elevator car 2000 according to the fourth embodiment. FIG. 14 is a schematic diagram showing the ceiling of elevator car 2000 (hereinafter referred to as "elevator ceiling section 210") according to the fourth embodiment. The elevator car 2000 includes an elevator ceiling 210, a car floor 211, a wall 212, and a door 213.

The elevator ceiling section 210 has a ceiling plate section 210a and a ceiling metal plate 210b. The ceiling plate portion 210a and the ceiling metal plate 210b are arranged to face each other. A space is formed between the ceiling plate part 210a and the ceiling metal plate 210b. The ceiling sheet metal 210b is arranged on the car floor section 211 side. The lighting fixture 1 is installed in a space between the ceiling plate part 210a and the ceiling metal plate 210b. As shown in FIG. 14, the height h of the space in the Z-axis direction is desirably narrow, for example, about 50 mm. The lighting fixture 1 is inserted into a mounting hole 220 made in the ceiling metal plate 210b, and is supported by the mounting hole 220 by the force of the mounting spring 8 that tends to open due to its elastic force. The ceiling metal plate 210b corresponds to the above-mentioned installation surface.

For example, when installing the lighting fixture described in JP-A No. 2014-112567 in the space of the present disclosure, there is a risk that the entire length of the fixture will not fit in the space, so the lighting fixture may penetrate the ceiling panel. You need to make a hole for it. Additionally, when inspecting elevator cars, workers work on the ceiling panel, so it is necessary to protect the lighting fixtures by covering them so that workers do not come into direct contact with the lighting fixtures that protrude from the ceiling panel. There is.

However, since the overall length of the lighting fixture 1 can be shortened, the lighting fixture 1 can be installed in the space of the elevator car 2000 without the lighting fixture 1 protruding from the ceiling plate portion 210a.

In addition, since the lighting fixture 1 can be installed without protruding from the ceiling plate portion 210a, there is no need to make a hole through the lighting fixture 1 in the ceiling plate portion 210a, and there is no need to arrange a cover to cover the lighting fixture 1. Thereby, the work efficiency when the worker works on the ceiling plate portion 210a can be improved.

Further, since the side wall portion 3b extends in the opposite direction than the bottom portion 3a and can protect the head of the fastening member 7, it is possible to improve workability when an operator works on the ceiling plate portion 210a.

In addition, in Embodiment 4, an example was shown in which the lighting fixture 1 is fixed to the ceiling metal plate 210b by the mounting spring 8. It can be different.

Further, in the fourth embodiment, an example was shown in which the lighting fixture 1 is installed in the elevator car 2000, but the lighting fixture 1a, 10, or 100 may be installed.

Note that in this disclosure, an example is shown in which a glass epoxy substrate is used as the substrate 21, but a metal substrate such as aluminum or iron may be used, or a paper phenolic material may be used.

Further, in the present disclosure, an example is shown in which the heat sink 3 is made of aluminum, but it may be made of a metal or alloy with good thermal conductivity such as copper. Further, the heat sink 3 may be formed of a resin material with good thermal conductivity or the like.

Further, in the present disclosure, an example is shown in which the radiation fins 3c and the radiation fins 30c are plate-shaped, but the present disclosure is not limited to this.

Further, in the present disclosure, an example has been shown in which the radiation fins 3c extend from the end on the emission direction side of the outer circumferential surface of the side wall portion 3b to the end on the counter emission direction side. It can be formed in any way. Furthermore, although an example has been shown in which the radiation fins 30c extend from the end of the outer peripheral surface of the side wall portion 30b on the emission direction side to the bottom portion 30a, the radiation fins 30c may be formed in any manner on the outer peripheral surface of the side wall portion 30b. However, no restrictions are placed on the shape on the bottom portion 30a.

Further, in the present disclosure, an example is shown in which the reflective member 4 is made of ABS resin, but it may be made of a white colored resin material such as polypropylene or PBT (polybutylene terephthalate) resin, for example. Further, the reflective member 4 may be formed of a metal with high reflectivity such as aluminum.

Further, in the present disclosure, an example has been shown in which the diffusion plate 5 is made of acrylic resin, but for example, it may be made of a material made by mixing microparticles into a transparent resin material such as polycarbonate resin to give it diffusivity. You may. Alternatively, the diffusion plate 5 may be formed of a transparent material such as acrylic resin, polycarbonate resin, or glass, which has minute irregularities on its surface to impart diffusivity. Further, the diffuser plate 5 is formed of a transparent material such as acrylic resin, polycarbonate resin, or glass, and the diffusion property is increased between the diffuser plate 5 and the reflective member 4 or between the diffuser plate 5 and the case 6. The diffusion plate 5 may be configured to have diffusive properties by sandwiching a sheet therebetween. Furthermore, the diffusion plate 5 may be formed by placing a diffusive thin film on the surface of a transparent material such as acrylic resin, polycarbonate resin, or glass.

Further, in the present disclosure, an example is shown in which the case 6 is made of ABS resin, but it may be made of a colored resin material such as polypropylene or PBT resin, for example. Further, the case 6 may be formed of a metal with high reflectivity such as aluminum. Furthermore, the surface condition of the case 6 may be smooth or may have minute irregularities for diffusing light.

Further, in the present disclosure, an example is shown in which the attachment spring 8 is shaped like a plate spring, but it may also be shaped like a wire spring.

Further, in the present disclosure, an example is shown in which LED chips are used as the light emitting section 20 and the light emitting section 201, but an LD (Laser Diode) chip may be used, for example. Further, the light emitting element may have one light emitting surface having a large area.

Further, in the present disclosure, an example has been shown in which the light emitting unit 20 is a single-chip system in which white light is emitted by a blue LED and a yellow phosphor, but a single chip in which a blue LED, a red phosphor, and a green phosphor are mixed together is shown. It may also be a method. Furthermore, a multi-chip system may be used in which a red LED, a green LED, and a blue LED are mixed.

Further, in the present disclosure, no particular restrictions are placed on the arrangement of the LED chips on the light emitting substrate 2.

Further, in the present disclosure, the outer shapes of the side wall portion 3b (side wall portion 30b), the reflective member 4, and the case 6, and the shape of the lighting fixture 1 may be circular, elliptical, or polygonal, and there are no particular restrictions. do not have.

Further, in the present disclosure, a thermally conductive material such as thermally conductive grease or a thermally conductive sheet, or an adhesive may be interposed between the light emitting substrate 2 and the bottom portion 3a (bottom portion 30a). Whether or not to use these adhesives may be determined based on the heat resistance, lifespan, strength, etc. of the LED chip or circuit element used.

Further, in the present disclosure, it is possible to freely combine the embodiments, and to modify or omit the embodiments as appropriate within the scope of the invention.

1, 10, 100 lighting equipment, 2, 200 light emitting board, 3, 30 heat sink,
4,400 reflective member, 5 diffuser plate, 6 case, 7 fastening member, 8 mounting spring,
9 spring fastening member, 20, 201 light emitting part, 21, 202 substrate, 22 heat conductive sheet, 210 elevator ceiling, 211 car floor, 212 wall, 213 door,
220 Mounting hole, 500 Lens, 600 Assembly jig, 2000 Elevator car.

Claims (8)

a light emitting substrate having a light emitting part that emits light;
a heat sink having a bottom portion where the light emitting substrate is placed, a cylindrical side wall portion accommodating the light emitting substrate, and a heat radiation fin formed on an outer peripheral surface of the side wall portion to radiate heat generated from the light emitting portion;
a reflecting member that is housed in the side wall portion, is arranged to surround the light emitting portion, and reflects the light;
a case at least partially accommodated in the side wall;
a mounting spring that fixes the lighting fixture to the mounting hole on the installation surface;
Equipped with
When the direction in which the light is emitted is defined as an emission direction, and the direction opposite to the emission direction is defined as a counter-emission direction, the side wall portion is formed to extend further toward the counter - emission direction than the bottom portion,
The light emitting substrate is disposed on the emission direction side of the bottom, the reflecting member is disposed on the emission direction side of the light emitting substrate, and the case is disposed on the emission direction side of the reflecting member,
A fastening member that fastens the bottom part and the case is arranged from the opposite side of the bottom part in the emission direction through the reflective member ,
The mounting spring is fastened to the outer circumferential surface of the side wall portion on a side opposite to the emission direction from the bottom portion, and has a hole portion that penetrates in a direction intersecting a direction in which the side wall portion extends, and the case includes: a convex portion protruding toward the outside of the case at a position corresponding to the hole of the mounting spring;
The lighting fixture , wherein the convex portion is inserted into the hole of the mounting spring . The entire circumference of the end portion of the side wall portion on the opposite side of the emission direction extends further toward the opposite side of the emission direction than the bottom portion.
The lighting fixture according to claim 1. The heat sink has a bottom heat dissipation fin extending from the heat dissipation fin to the bottom.
The lighting fixture according to claim 1. Further comprising a heat dissipating member having heat dissipating properties,
the heat dissipation member is sandwiched between the light emitting substrate and the bottom of the heat sink;
The lighting fixture according to any one of claims 1 to 3. The end portion of the side wall portion on the counter -emission direction side extends further toward the counter-emission direction side than the end portion of the fastening member on the counter- emission direction side.
The lighting fixture according to any one of claims 1 to 4. a diffuser plate disposed on the emission direction side of the reflective member, disposed on the opposite emission direction side of the case, and diffusing the light emitted from the light emitting part;
The lighting fixture according to any one of claims 1 to 5. A method for assembling a lighting fixture, the method comprising:
The lighting equipment includes:
a light emitting substrate having a light emitting part that emits light;
a heat sink having a bottom portion where the light emitting substrate is placed, a cylindrical side wall portion accommodating the light emitting substrate, and a heat radiation fin formed on an outer peripheral surface of the side wall portion to radiate heat generated from the light emitting portion;
a reflecting member that is housed in the side wall portion, is arranged to surround the light emitting portion, and reflects the light;
a case at least partially accommodated in the side wall;
Equipped with
When the direction in which the light is emitted is defined as an emission direction, and the direction opposite to the emission direction is defined as a counter-emission direction, the side wall portion is formed to extend further toward the counter-emission direction than the bottom portion,
The light emitting substrate is disposed on the emission direction side of the bottom, the reflecting member is disposed on the emission direction side of the light emitting substrate, and the case is disposed on the emission direction side of the reflecting member,
A fastening member that fastens the bottom part and the case is arranged from the opposite side of the bottom part in the emission direction through the reflective member,
Through holes penetrating from the emission direction side to the counter- emission direction side are provided at corresponding positions of the light emitting substrate, the bottom part of the heat sink, the reflection member, and the case,
An assembly jig having a guide pin provided at a position corresponding to the through hole is inserted into the through hole of each of the heat sink, the light emitting board, the reflective member, and the case from the side opposite to the emission direction in this order. a step of combining the heat sink, the light emitting substrate, the reflective member, and the case;
pulling out the assembly jig from the through hole of the combined heat sink, light emitting board, reflective member, and case in the opposite direction;
The assembly jig is pulled out from the through hole, and the through hole of the heat sink, the light emitting board, the reflective member, and the case are inserted into the through hole of the case from the opposite side of the bottom of the case. inserting the fastening member into the hole, fastening the bottom part and the case, and fixing the heat sink, the light emitting board, the reflective member, and the case;
How to assemble lighting equipment. An elevator car comprising a car floor, an elevator ceiling, a wall, and a door,
comprising the lighting fixture according to any one of claims 1 to 6 installed on the elevator ceiling,
The elevator ceiling part has a ceiling plate part and a ceiling metal plate arranged to face each other,
The ceiling metal plate is disposed closer to the car floor than the ceiling plate part, a space is formed between the ceiling plate part and the ceiling metal plate, and the lighting fixture is formed on the ceiling metal plate. installed in the space through the mounting hole and does not protrude from the ceiling board;
elevator car.

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