Illuminating device

Abstract

To provide an illuminating device that can restrain a gap from being generated between a flange part and a ceiling member.SOLUTION: An illuminating device comprises: an appliance body comprising a light source part in a lower surface, and to be inserted into an opening part formed in a ceiling member; and a power supply unit to be arranged above the ceiling member, connected to the appliance body, and for supplying electric power to the light source part. The appliance body comprises a flange part to be brought into contact with a lower surface of the ceiling member. One end part of the power supply unit is connected to an upper part of the appliance body so as to be rockable in a vertical direction. A leg part protruding from the power supply unit is provided between the one end part and the other end part of the power supply unit. The leg part is brought into contact with an upper surface of the ceiling member, and supports the power supply unit.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] Patent Document 1 describes a recessed lighting device. This lighting device includes a light-emitting unit, a heat sink, and a power supply unit. The heat sink has an installation section on which the light-emitting unit is installed at the bottom, a plurality of first heat-dissipating fins protruding upward from the installation section, and a plurality of second heat-dissipating fins protruding laterally from above the first heat-dissipating fins. The lighting device is held in place by sandwiching a ceiling member between a flange and a mounting spring. The power supply unit is attached to the tip end of the second heat-dissipating fins so as to be able to swing up and down. The tip end of the power supply unit is in contact with the upper surface of the ceiling member and is supported by the ceiling member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-95981 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned lighting device, a downward load due to the mass of the power supply unit is applied to the second heat dissipation fin section. Because the second heat dissipation fin section is positioned off-center from the central axis of the installation section, when this downward load is applied, a portion of the lighting device's flange section on the power supply unit side may sag downward from the ceiling member against the spring force of the mounting spring. In this case, a gap occurs between the flange section and the ceiling member, which is an issue.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a lighting device that can prevent a gap from occurring between a flange portion and a ceiling member. [Means for solving the problem]

[0006] The lighting device according to the present disclosure comprises a fixture body having a light source unit on its underside and inserted into an opening formed in a ceiling member, and a power supply unit disposed above the ceiling member and connected to the fixture body to supply power to the light source unit, wherein the fixture body has a flange portion that abuts against the underside of the ceiling member, one end of the power supply unit is connected to an upper part of the fixture body so as to be swingable in the vertical direction, and legs protruding from the power supply unit are provided between the one end and the other end of the power supply unit, and the legs abut against the upper surface of the ceiling member to support the power supply unit. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to prevent a gap from occurring between the flange portion and the ceiling member. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a configuration of an illumination device according to a first embodiment. [Figure 2] 1 is a top view showing the configuration of an illumination device according to a first embodiment. [Figure 3] 1 is a side view showing the configuration of an illumination device according to Embodiment 1. FIG. [Figure 4] 1 is an exploded perspective view showing the configuration of an illumination device according to a first embodiment. [Figure 5] 1 is a side view showing a state in which the lighting device according to the first embodiment is installed in an opening in a ceiling member. [Figure 6] 4A and 4B are diagrams illustrating examples of the configuration of the tip end of a leg of the lighting device according to the first embodiment. [Figure 7] 4A and 4B are diagrams illustrating examples of the configuration of the tip end of a leg of the lighting device according to the first embodiment. [Figure 8] 4A and 4B are diagrams illustrating examples of the configuration of the tip end of a leg of the lighting device according to the first embodiment. [Figure 9]10 is a side view showing a case where the thickness of the ceiling member is different in a state in which the lighting device according to the first embodiment is installed in an opening in the ceiling member. FIG. [Figure 10] 10 is a side view showing a case where the thickness of the ceiling member is different in a state in which the lighting device according to the first embodiment is installed in an opening in the ceiling member. FIG. [Figure 11] 10 is a side view showing a case where the thickness of the ceiling member is different in a state in which the lighting device according to the first embodiment is installed in an opening in the ceiling member. FIG. [Figure 12] 10 is a side view showing a process of installing the lighting device according to the first embodiment. FIG. [Figure 13] 10 is a side view showing the configuration of an illumination device according to a modified example of the first embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiments of the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to the following embodiments and can be modified in various ways without departing from the spirit and scope of the present disclosure. Furthermore, the present disclosure includes all possible combinations of the configurations shown in the following embodiments. In particular, the combinations of components are not limited to those in each embodiment; components described in one embodiment can be applied to another embodiment. In the following description, directional terms (e.g., "up," "down," "right," "left," "front," "rear," etc.) are used as appropriate to facilitate understanding, but these are for explanatory purposes and do not limit the present disclosure. In each drawing, components designated with the same reference numerals are identical or equivalent, and this applies throughout the entire specification. Note that the relative dimensional relationships or shapes of each component in each drawing may differ from those in reality.

[0010] Embodiment 1 A lighting device according to embodiment 1 will be described. In this embodiment, a ceiling-embedded lighting device is exemplified as the lighting device. The ceiling-embedded lighting device is installed in an opening formed in a ceiling member. The ceiling-embedded lighting device is also called a downlight.

[0011] Fig. 1 is a perspective view showing the configuration of an illumination device according to the present embodiment. Fig. 2 is a top view showing the configuration of an illumination device according to the present embodiment. Fig. 3 is a side view showing the configuration of an illumination device according to the present embodiment. Fig. 4 is an exploded perspective view showing the configuration of an illumination device according to the present embodiment.

[0012] As shown in Figures 1 to 4, the lighting device 1 has a fixture body 2 and a power supply unit 3. The fixture body 2 is inserted into an opening 51 formed in a ceiling member 5 (see Figure 5). The fixture body 2 has a light source section 20 having a light source board on which light-emitting elements serving as light sources are mounted, a base plate 21 on the underside of which the light source section 20 is disposed, and heat dissipation fins 22 disposed on the upper surface of the base plate 21.

[0013] In this embodiment, light-emitting diodes (LEDs) are used as the light-emitting elements. However, the light-emitting elements are not limited to LEDs, and lasers, organic electroluminescence (EL), quantum dots, and the like can also be used as the light-emitting elements. The base plate 21 is preferably formed using a material with thermal conductivity sufficient to dissipate heat generated by the light-emitting elements, such as aluminum, glass, or steel plate. The heat dissipation fins 22 are formed from a metal material, such as aluminum. The overall shape of the heat dissipation fins 22 is cylindrical, with the center at the central axis 2a of the fixture body 2. Heat generated in the light source unit 20 is transferred to the heat dissipation fins 22 via the base plate 21 and dissipated to the outside from the heat dissipation fins 22.

[0014] A cover 23 is disposed below the light source unit 20. The cover 23 has a function of controlling the light emitted from the light emitting element. The cover 23 is made of a translucent resin material or glass material.

[0015] A light source unit holding member 24 is provided between the base plate 21 and the cover 23. The light source unit holding member 24 holds the base plate 21 on its upper surface side and holds the cover 23 on its lower surface side. An opening 241 is formed in the center of the light source unit holding member 24. The light source of the light source unit 20 provided on the lower surface of the base plate 21 is covered from below by the cover 23 through the opening 241.

[0016] A decorative frame 25 is provided below the light source unit holding member 24 and the cover 23. The decorative frame 25 has a flange portion 251. The flange portion 251 has an outer diameter that is larger than the inner diameter of an opening 51 formed in the ceiling member 5. The upper surface of the flange portion 251 abuts against the lower surface of the ceiling member 5. As a result, when the lighting device 1 is installed in the opening 51, the periphery of the opening 51 is hidden by the flange portion 251.

[0017] Furthermore, a plurality of mounting springs 252 are provided on the upper surface of the flange portion 251 of the design frame 25. When the lighting device 1 is installed in the opening 51, the mounting springs 252 abut against the upper surface of the ceiling member 5. The fixture body 2 is attached to the ceiling member 5 by sandwiching the ceiling member 5 between the mounting springs 252 and the flange portion 251.

[0018] The power supply unit 3 is disposed above the ceiling member 5 and is connected to the fixture body 2. The power supply unit 3 has an elongated rectangular parallelepiped shape that is long in one direction. The outer shell of the power supply unit 3 is formed by a metal housing 34. The housing 34 is formed in a cylindrical shape with a rectangular cross section. One longitudinal end 3a of the power supply unit 3 is formed with a connecting portion 31 that is connected to the fixture body 2. The other longitudinal end 3b of the power supply unit 3 is formed with a terminal block 32 to which power is supplied from the outside. The power supply unit 3 generates lighting power using the external power supplied via the terminal block 32. The lighting power generated by the power supply unit 3 is supplied to the light source unit 20 of the fixture body 2 via a power supply line 33.

[0019] A coupled portion 221 to which the connecting portion 31 is coupled is formed in a part of the heat dissipation fin 22. The coupled portion 221 is located at the top of the appliance main body 2. The coupled portion 221 is provided at a position shifted in one direction from the central axis 2a of the appliance main body 2.

[0020] The connecting part 31 is connected to the connected part 221 so as to be rotatable about a rotation axis extending parallel to the surface of the flange part 251. As a result, the power supply unit 3 is connected to the upper part of the fixture body 2 so as to be able to swing up and down. The power supply unit 3 is disposed at a position offset from the central axis 2a in the same direction as the offset direction of the connected part 221 from the central axis 2a. When viewed along the central axis 2a, the longitudinal direction of the power supply unit 3 is aligned with the radial direction of the fixture body 2 centered on the central axis 2a. Legs 35, which will be described later, are provided on a housing 34 of the power supply unit 3 (see FIG. 5).

[0021] In this embodiment, the power supply unit 3 and the fixture body 2 are rotatably connected using a screw, but this is not limiting. If the power supply unit 3 can swing up and down relative to the fixture body 2, the power supply unit 3 and the fixture body 2 may be connected via a member such as a spring.

[0022] FIG. 5 is a side view showing a state in which the lighting device according to this embodiment is installed in an opening in a ceiling member. As shown in FIG. 5, the housing 34 of the power supply unit 3 has a lower surface 34a that faces the upper surface of the ceiling member 5. Legs 35 are provided on the lower surface 34a between one end 3a and the other end 3b of the power supply unit 3. The legs 35 are formed in a rod or plate shape using a resin material or a metal material and are fixed to the power supply unit 3. The legs 35 protrude from the lower surface 34a in a direction approximately perpendicular to the lower surface 34a. A base 351 of the legs 35 is connected to the lower surface 34a. A tip 352 of the legs 35 is in contact with the upper surface of the ceiling member 5. As a result, the power supply unit 3 is supported from the ceiling member 5 by the legs 35. The other end 3b of the power supply unit 3 is not in contact with the ceiling member 5. As a result, a gap 36 is formed between the other end 3b and the ceiling member 5. The power supply unit 3 is tilted with respect to the horizontal plane so that the height position on the other end 3b side is lower than the height position on the one end 3a side.

[0023] Here, the position of the leg 35 will be described. In Fig. 5, for example, the leg 35 is provided at any one of fulcrum P1, P2, and P3. Fulcrum P1 and P2 are located closer to the other end 3b than the center of gravity 3c of the power supply unit 3. Of these, fulcrum P2 is located between fulcrum P1 and the center of gravity 3c. Fulcrum P3 is located closer to the one end 3a than the center of gravity 3c. The length of the leg 35 is set so that the height position on the other end 3b side of the power supply unit 3 is lower than the height position on the one end 3a side of the power supply unit 3.

[0024] Compared to the case where the leg 35 is not provided, i.e., the other end 3b is in contact with the ceiling member 5, whether the leg 35 is provided at the fulcrum P1, P2, or P3, the downward load applied to the fixture body 2 due to the mass of the power supply unit 3 is smaller. Therefore, whether the leg 35 is provided at the fulcrum P1, P2, or P3, it is possible to prevent a gap from being generated between the flange 251 and the ceiling member 5.

[0025] When the fulcrum is located closer to the other end 3b than the center of gravity 3c, the closer the fulcrum is to the center of gravity 3c, the smaller the downward load applied to the tool body 2. That is, when the leg 35 is provided at the fulcrum P2, the downward load applied to the tool body 2 can be made smaller than when the leg 35 is provided at the fulcrum P1.

[0026] On the other hand, when the fulcrum is located closer to the one end 3a than the center of gravity position 3c, the load acting on the fixture body 2 is directed upward. That is, a load is applied to the fixture body 2 in a direction that lifts the flange portion 251. Therefore, when the leg portion 35 is provided on the fulcrum P3, it is possible to more reliably prevent a gap from occurring between the flange portion 251 and the ceiling member 5.

[0027] 6 to 8 are diagrams showing examples of the configuration of the tip of the leg of the lighting device according to this embodiment. In the example shown in Fig. 6, tip 352 of leg 35 is folded back to form a rounded shape. This increases the contact area between tip 352 and ceiling member 5, thereby preventing the load from concentrating on one part of ceiling member 5.

[0028] 7, the tip 352 of the leg 35 is formed in a flat shape so as to be in surface contact with the ceiling member 5. This example also makes it possible to prevent the load from concentrating on one part of the ceiling member 5.

[0029] 8, the legs 35 are formed in the shape of a leaf spring. The legs 35 are bent so that a curved portion is formed at the tip 352. This example also increases the contact area between the tip 352 and the ceiling member 5, thereby preventing the load from concentrating on one part of the ceiling member 5.

[0030] 9 to 11 are side views showing cases where the thickness of the ceiling member is different when the lighting device according to this embodiment is installed in an opening in the ceiling member. As shown in FIGS. 9 to 11, the ceiling member 5 comes in various thicknesses, but the thickness of the ceiling member 5 is generally specified to be in the range of 5 to 25 mm. In this embodiment, the position and length of the legs 35 are set so that the height position on the other end 3b side of the power supply unit 3 is lower than the height position on one end 3a side of the power supply unit 3, even when the thickness of the ceiling member 5 is 25 mm.

[0031] Fig. 12 is a side view showing a process for installing the lighting device according to this embodiment. As shown in Fig. 12, when installing the lighting device 1 through the opening 51 in the ceiling member 5, the power supply unit 3 is first passed through the opening 51. When the power supply unit 3 is passed through the opening 51, the legs 35 may get in the way. For this reason, in this embodiment, the legs 35 have a foldable configuration.

[0032] The leg 35 is rotatably attached to the power supply unit 3, for example, at its base 351. The leg 35 can take at least a first position where it protrudes from the power supply unit 3, and a second position where it extends along the power supply unit 3. In FIG. 12, the leg 35 in the first position is shown by a two-dot chain line, and the leg 35 in the second position is shown by a solid line. The protrusion of the leg 35 from the power supply unit 3 in the second position is smaller than the protrusion of the leg 35 from the power supply unit 3 in the first position.

[0033] The power supply unit 3 is provided with a biasing member 353 such as a spring. The biasing member 353 is configured to bias the leg 35 from the second position toward the first position. When installing the lighting device 1 in the opening 51, the installer applies a force to the leg 35 in the opposite direction to the force of the biasing member 353, moving the leg 35 from the first position to the second position as shown by the thick arrow in FIG. 12 . In this state, the installer passes the power supply unit 3 through the opening 51. When the installer releases the force applied to the leg 35, the force of the biasing member 353 returns the leg 35 from the second position to the first position. Then, the installer inserts the fixture body 2 into the opening 51 and abuts the flange 251 against the ceiling member 5. This places the lighting device 1 in the state shown in FIG. 5 .

[0034] Fig. 13 is a side view showing the configuration of a lighting device according to a modified example of the present embodiment. In the configuration shown in Figs. 1 to 12, one end 3a of the power supply unit 3 is connected to the upper part of the fixture body 2 at a position offset from the central axis 2a. In contrast, one end 3a of the power supply unit 3 in this modified example is rotatably connected to the upper part of the fixture body 2 at a position on the central axis 2a. In other words, the connecting portion 31 formed on the one end 3a is formed at a position on the central axis 2a. The rotation axis of the connecting portion 31 intersects with the central axis 2a.

[0035] The legs 35 are provided closer to the one end 3a than the center of gravity 3c of the power supply unit 3. As a result, an upward load is applied to the fixture body 2. In this modification, the one end 3a of the power supply unit 3 is connected to the central axis 2a, so tilting of the fixture body 2 and the flange portion 251 due to the load can be prevented. Therefore, according to this modification, it is possible to more reliably prevent a gap from occurring between the flange portion 251 and the ceiling member 5.

[0036] As described above, the lighting device 1 according to this embodiment includes the fixture body 2 and the power supply unit 3. The fixture body 2 has the light source unit 20 on its underside. The fixture body 2 is inserted into the opening 51 formed in the ceiling member 5. The power supply unit 3 is disposed above the ceiling member 5 and connected to the fixture body 2. The power supply unit 3 supplies power to the light source unit 20. The fixture body 2 has a flange portion 251 that abuts against the underside of the ceiling member 5. One end 3a of the power supply unit 3 is connected to the upper part of the fixture body 2 so as to be swingable in the up and down direction. Between the one end 3a and the other end 3b of the power supply unit 3, a leg portion 35 is provided that protrudes from the power supply unit 3. The leg portion 35 abuts against the upper surface of the ceiling member 5 to support the power supply unit 3.

[0037] According to this configuration, the leg 35 is provided between the one end 3a and the other end 3b, which reduces the downward load applied to the fixture body 2 due to the mass of the power supply unit 3. Therefore, it is possible to prevent a gap from being generated between the flange portion 251 and the ceiling member 5.

[0038] In the lighting device 1 according to the present embodiment, the leg portion 35 is provided closer to the one end portion 3a than the center of gravity 3c of the power supply unit 3.

[0039] According to this configuration, the load acting on the fixture body 2 due to the mass of the power supply unit 3 can be directed upward. Therefore, it is possible to more reliably prevent a gap from occurring between the flange portion 251 and the ceiling member 5.

[0040] In the lighting device 1 according to this embodiment, one end 3a of the power supply unit 3 is connected to an upper portion of the fixture body 2 at a position on the central axis 2a of the fixture body 2.

[0041] This configuration can prevent the fixture body 2 and the flange portion 251 from tilting due to the load. Therefore, it is possible to more reliably prevent a gap from being generated between the flange portion 251 and the ceiling member 5.

[0042] In the lighting device 1 according to the present embodiment, the leg 35 is configured to take at least a first position where it protrudes from the power supply unit 3, and a second position where it extends along the power supply unit 3. The power supply unit 3 is provided with a biasing member 353 that biases the leg 35 from the second position toward the first position.

[0043] According to this configuration, when the power supply unit 3 is passed through the opening 51 in the process of installing the lighting device 1, the legs 35 can be prevented from getting in the way.

[0044] In the lighting device 1 according to this embodiment, the leg portion 35 has a tip portion 352 that abuts against the ceiling member 5. The tip portion 352 is folded back so as to form a rounded shape.

[0045] According to this configuration, the contact area between the tip 352 and the ceiling member 5 can be increased, and therefore the load can be prevented from concentrating on one part of the ceiling member 5.

[0046] In the lighting device 1 according to this embodiment, the leg portion 35 has a tip portion 352 that abuts against the ceiling member 5. The tip portion 352 is formed in a flat shape so as to be in surface contact with the ceiling member 5.

[0047] According to this configuration, the contact area between the tip 352 and the ceiling member 5 can be increased, and therefore the load can be prevented from concentrating on one part of the ceiling member 5.

[0048] In the lighting device 1 according to the present embodiment, the leg 35 is formed in the shape of a leaf spring. The leg 35 has a tip 352 that abuts against the ceiling member 5. The leg 35 is bent so that a curved portion is formed at the tip 352.

[0049] According to this configuration, the contact area between the tip 352 and the ceiling member 5 can be increased, and therefore the load can be prevented from concentrating on one part of the ceiling member 5.

[0050] Various aspects of the present disclosure are described below.

[0051] (Appendix 1) a fixture body having a light source unit on its underside and inserted into an opening formed in a ceiling member; a power supply unit that is disposed above the ceiling member and connected to the fixture body and supplies power to the light source unit; Equipped with The fixture body has a flange portion that abuts against the lower surface of the ceiling member, One end of the power supply unit is connected to the upper part of the appliance body so as to be swingable in the up and down direction, a leg portion protruding from the power supply unit is provided between the one end and the other end of the power supply unit; The leg portion abuts against the upper surface of the ceiling member to support the power supply unit. (Appendix 2) 2. The lighting device according to claim 1, wherein the leg is provided closer to the one end than the center of gravity of the power supply unit. (Appendix 3) 3. The lighting device according to claim 1, wherein the one end of the power supply unit is connected to an upper portion of the fixture body at a position on the central axis of the fixture body. (Appendix 4) the legs are configured to take at least a first position protruding from the power supply unit and a second position extending along the power supply unit; 4. The lighting device according to claim 1, wherein the power supply unit is provided with a biasing member that biases the leg portion from the second position toward the first position. (Appendix 5) the leg has a tip that abuts against the ceiling member, 5. The lighting device according to claim 1, wherein the tip is folded back to form a rounded shape. (Appendix 6) the leg has a tip that abuts against the ceiling member, 5. The lighting device according to claim 1, wherein the tip portion is formed in a flat shape so as to be in surface contact with the ceiling member. (Appendix 7) The leg portion is formed in a leaf spring shape, the leg has a tip that abuts against the ceiling member, 5. The lighting device according to claim 1, wherein the leg is bent so that a curved surface is formed at the tip. [Explanation of symbols]

[0052] 1 lighting device, 2 fixture body, 2a central axis, 3 power supply unit, 3a one end, 3b other end, 3c center of gravity position, 5 ceiling member, 20 light source unit, 21 base plate, 22 heat dissipation fin, 23 cover, 24 light source unit holding member, 25 decorative frame, 31 connecting portion, 32 terminal block, 33 power supply line, 34 housing, 34a underside, 35 leg portion, 36 gap, 51 opening, 221 connected portion, 241 opening, 251 flange portion, 252 mounting spring, 351 base portion, 352 tip portion, 353 biasing member, P1, P2, P3 fulcrum.

Claims

1. a fixture body having a light source unit on its underside and inserted into an opening formed in a ceiling member; a power supply unit that is disposed above the ceiling member and connected to the fixture body and supplies power to the light source unit; Equipped with The fixture body has a flange portion that abuts against the lower surface of the ceiling member, One end of the power supply unit is connected to the upper part of the appliance body so as to be swingable in the up and down direction, a leg portion protruding from the power supply unit is provided between the one end and the other end of the power supply unit; The leg portion abuts against the upper surface of the ceiling member to support the power supply unit.

2. The lighting device according to claim 1 , wherein the leg portion is provided closer to the one end portion than the center of gravity of the power supply unit.

3. The lighting device according to claim 2 , wherein the one end of the power supply unit is connected to an upper portion of the fixture body at a position on a central axis of the fixture body.

4. the legs are configured to take at least a first position protruding from the power supply unit and a second position extending along the power supply unit; 4. The lighting device according to claim 1, wherein the power supply unit is provided with a biasing member that biases the leg portion from the second position toward the first position.

5. the leg has a tip that abuts against the ceiling member, 4. The lighting device according to claim 1, wherein the tip portion is folded back so as to form a rounded shape.

6. the leg has a tip that abuts against the ceiling member, The lighting device according to any one of claims 1 to 3, wherein the tip portion is formed in a flat shape so as to be in surface contact with the ceiling member.

7. The leg portion is formed in a leaf spring shape, the leg has a tip that abuts against the ceiling member, 4. The lighting device according to claim 1, wherein the leg portion is bent so that a curved portion is formed at the tip end.

Images