Lighting fixture

Abstract

To provide a lighting fixture whose height on the upper side of a surface to be mounted is low, and which can be disposed even in an embedded hole of a small diameter.SOLUTION: A lighting fixture 100 which is disposed being embedded in an embedded hole formed in a ceiling surface CS includes: a light source unit 10 having a light source 11; a power source unit 20 for supplying power to the light source 11; a terminal block 30 in which an internal power source line 31 for supplying power to the power source unit 20 and an external power source line for supplying power from the outside are electrically connected; and a terminal block support body 40 provided extending in the horizontal direction from the power source unit 20, and configured for supporting the terminal block 30. The terminal block support body 40 rotates from a state of extending in the horizontal direction from the power source unit 20 to a state of extending in the vertical direction from the power source unit 20.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a lighting fixture that is disposed by being embedded in an embedding hole formed in an attachment surface. [Background technology]

[0002] As a lighting fixture, for example, a small-diameter lighting fixture (downlight) that is embedded in a ceiling embedding hole formed in a ceiling surface or the like and irradiates light downward (floor, ground, wall, etc.) is known. In addition, a downlight may have a light source unit having a light source, a power supply unit that supplies power to the light source, and a terminal block to electrically connect an internal power line that supplies power to the power supply unit and an external power line for supplying power from the outside (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-162564 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in recent years, the diameter of ceiling recesses for downlights has become smaller. For example, if the diameter of the ceiling recess and the diameter of the power supply unit are approximately the same, it is necessary to insert the power supply unit vertically into the ceiling recess. In this case, if the ceiling depth (height above the ceiling surface) is low, it is not possible to place the terminal block on the top surface of the power supply unit.

[0005] On the other hand, in some lighting fixtures, the terminal block is supported by a terminal block support extending horizontally from the power supply unit. In lighting fixtures with such a configuration, if the diameter of the ceiling embedding hole and the diameter of the power supply unit are approximately the same, it is difficult to insert the lighting fixture into the ceiling embedding hole.

[0006] Therefore, an object of the present disclosure is to provide a lighting fixture that can be installed even in an embedding hole with a small diameter and a low upper side of the mounting surface. [Means for solving the problem]

[0007] The lighting fixture of the present disclosure is a lighting fixture that is embedded in an embedding hole formed in an attachment surface, and includes a light source unit having a light source, a power supply unit that supplies power to the light source, a terminal block to which an internal power line that supplies power to the power supply unit and an external power line for supplying power from the outside are electrically connected, and a terminal block support that extends horizontally from the power supply unit and supports the terminal block, and is characterized in that the terminal block support rotates from a state extending horizontally from the power supply unit to a state extending vertically from the power supply unit. Effect of the Invention

[0008] The lighting fixture of the present disclosure can be installed even in an embedding hole with a small diameter and a low height above the mounting surface. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view showing a lighting fixture as an example of an embodiment. [Diagram 2] 1 is a side cross-sectional view showing a lighting fixture as an example of an embodiment. [Diagram 3] FIG. 2 is a side cross-sectional view showing the lighting fixture in a vertically supported state. [Figure 4] FIG. 2 is a side cross-sectional view showing the lighting fixture in a horizontally supported state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A lighting device 100 as an example of an embodiment will be described below with reference to the drawings. Note that all of the embodiments described below are examples of the present disclosure. Therefore, the numerical values, components, arrangements and connection forms of the components, etc. shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Therefore, among the components in the following embodiments, components that are not described in the independent claims that represent the highest concept of the present disclosure will be described as optional components.

[0011] Note that each figure is a schematic diagram and is not necessarily a precise illustration. In each figure, the same reference numerals are used for substantially the same configurations, and duplicated explanations may be omitted or simplified. In addition, in this specification, the terms "upper" and "lower" do not necessarily refer to the upper direction (vertically upward) and the lower direction (vertically downward) in absolute spatial recognition.

[0012] [Overall configuration of lighting fixtures] The overall configuration of lighting fixture 100 will be described with reference to FIGS.

[0013] The lighting fixture 100 is, for example, a downlight that irradiates light downward (floor, ground, wall, etc.). The lighting fixture 100 is disposed, for example, on a ceiling surface CS (see Figs. 3 and 4) of a building. The lighting fixture 100 of this embodiment is a ceiling recessed lighting fixture, and is disposed, for example, by being embedded in a ceiling recessing hole formed in the ceiling surface CS. The ceiling recessing hole of this embodiment is circular in plan view. The lighting fixture 100 of this embodiment is a small-diameter lighting fixture disposed in a ceiling recessing hole of a relatively small diameter (for example, 75 mmΦ). However, the lighting fixture of the present disclosure may be disposed on a mounting surface other than a ceiling surface. The present disclosure may also be applied to lighting fixtures other than ceiling recessed lighting fixtures and lighting fixtures other than downlights.

[0014] The lighting fixture 100 includes a light source unit 10 having a light source 11, and a power supply unit 20 that supplies power to the light source 11. The lighting fixture 100 further includes a terminal block 30 to which an internal power line 31 that supplies power to the power supply unit 20 and an external power line (not shown) for supplying power from the outside are electrically connected, and a terminal block support 40 that extends horizontally from the power supply unit 20 and supports the terminal block 30.

[0015] [Light source unit] The light source unit 10 will be described with reference to FIGS.

[0016] As described above, the light source unit 10 is a member having the light source 11. The light source unit 10 is electrically connected to a power supply unit 20 (described later) by a connecting power line 19. The light source unit 10 has the light source 11, a holder 14, a frame 15, a top plate 16, a light-transmitting cover 17, and an attachment spring 18, each of which will be described in detail below.

[0017] The light source 11 is an LED light source constituted by, for example, an LED, and emits, for example, white light. The light source 11 is held by a holder 14 and fixed to a frame body 15. The light source 11 has a substrate 12 and a light emitting section 13. The light source 11 is a COB type LED light source in which an LED is directly mounted on the substrate 12. In this embodiment, an LED is used as the light emitting element, but other solid-state light emitting elements such as a semiconductor light emitting element such as a semiconductor laser, an organic EL (Electro Luminescence), or an inorganic EL may also be used as the light emitting element.

[0018] The substrate 12 is a light source substrate on which the light emitting portion 13 is provided. The substrate 12 is a mounting substrate for mounting an LED. The substrate 12 is also a wiring substrate on which metal wiring is formed in a predetermined pattern.

[0019] The light emitting unit 13 has a plurality of LEDs mounted on the substrate 12 and a sealing member that seals the plurality of LEDs. The LED is an example of a light emitting element, and is, for example, a bare chip that emits monochromatic visible light. The LED is, for example, a blue LED chip that emits blue light when energized. For example, a plurality of LEDs are arranged in a matrix on the substrate 12. It is sufficient that at least one LED is arranged.

[0020] The sealing member may be, for example, a light-transmitting resin. The sealing member in this embodiment contains a phosphor as a wavelength conversion material that converts the wavelength of light from the LED. The sealing member may be, for example, a phosphor-containing resin in which a phosphor is dispersed in a silicone resin. When the LED is a blue LED chip that emits blue light, for example, a YAG-based yellow phosphor may be used as the phosphor particles to obtain white light.

[0021] As described above, the holder 14 is a member that holds the light source 11. The holder 14 is formed in a substantially cylindrical shape and is a resin molded member made of an insulating resin material or the like. The holder 14 is held by a holder holding portion 15C of the frame 15, which will be described later.

[0022] The frame 15 is embedded in a ceiling embedding hole formed in the ceiling surface CS, and is a member that holds the holder 14, the light-transmitting cover 17, and the mounting spring 18. The frame 15 is substantially cylindrical, and is formed so that the center of the cylindrical shape in the height direction is blocked by a holder holding part 15C, which will be described in detail later. The frame 15 is formed of a metal material such as aluminum. The frame 15 is also formed by die-casting, for example. The frame 15 has a reflecting part 15A, a heat dissipating part 15B, and a holder holding part 15C, which will be described in detail later.

[0023] The reflecting portion 15A is a portion that reflects the light emitted from the LED element of the light source 11. The reflecting portion 15A is formed in an umbrella shape extending downward from the holder holding portion 15C, and a flange portion 15D is formed at the lower end. A reflective surface is formed on the inner peripheral surface of the reflecting portion 15A. An attachment spring holding portion 15E that holds the attachment spring 18 is formed on the outer peripheral surface of the reflecting portion 15A.

[0024] The heat dissipation section 15B is a section that dissipates heat generated by the light source 11 to the outside. The heat dissipation section 15B is formed in a cylindrical shape extending upward from the holder holding section 15C. The heat dissipation section 15B also has a rib that protrudes toward the center inside the cylindrical shape. A top plate 16 is provided on the top of the heat dissipation section 15B.

[0025] As described above, the holder holding portion 15C is a portion that holds the holder 14 and the light-transmitting cover 17. The holder holding portion 15C is formed in the center in the height direction of the cylindrical frame 15 so as to separate the reflecting portion 15A and the heat dissipating portion 15B.

[0026] Top plate 16 is a member that covers the upper surface of heat dissipation section 15B of frame body 15. Top plate 16 is made of iron, aluminum, or another metal material.

[0027] The light-transmitting cover 17 is a member that transmits and diffuses the light emitted from the light source 11. The light-transmitting cover 17 is formed in a cylindrical shape with a bottom. The light-transmitting cover 17 is held by the holder holding part 15C of the frame body 15 so as to cover the holder 14 from below. The light-transmitting cover 17 may be made of a light-transmitting resin material such as acrylic or polycarbonate, or a light-transmitting material such as a glass material. The light-transmitting cover 17 is a diffusion cover having light diffusibility, but may also be a transparent cover having no light diffusibility.

[0028] As described above, the mounting spring 18 fixes the light source unit 10 to the ceiling embedding hole. In this embodiment, for example, two mounting springs 18 are held by the mounting spring holding portion 15E of the frame body 15. The mounting springs 18 are elastic members, and are, for example, leaf springs formed of a long metal plate. When fixing the lighting fixture 100 to the ceiling embedding hole, the flange portion 15D of the frame body 15 is engaged with the ceiling surface CS, and the mounting spring 18 is elastically deformed between the side surface of the frame body 15 and the inner surface of the ceiling embedding hole, and the restoring force of the mounting spring 18 is used to fix the lighting fixture 100 to the ceiling embedding hole.

[0029] [Power supply unit] The power supply unit 20 will be described with reference to FIGS.

[0030] The power supply unit 20 is a unit that supplies power to the LED elements of the light source 11 to light up the LED elements. As described above, the power supply unit 20 is electrically connected to the light source unit 10 by the interconnecting power line 19. In addition, a terminal block support 40 that supports the terminal block 30 is provided on the upper surface of the power supply unit 20.

[0031] The power supply unit 20 has a substantially cylindrical power supply case 21 and a drive circuit 22 in which a plurality of electronic components are mounted on a printed wiring board housed in the power supply case 21. The drive circuit 22 converts, for example, AC power (e.g., commercial AC power of AC 100V) received via a terminal block 30 and an internal power supply line 31 into DC power, and supplies the DC power to the light source unit 10 via the interconnecting power supply line 19. In addition, heat generated by the plurality of electronic components is dissipated from the power supply case 21.

[0032] [Terminal block] The terminal block 30 will be described with reference to FIGS.

[0033] As described above, the terminal block 30 is a member that electrically connects the internal power line 31 that supplies power to the power supply unit 20 and the external power line for supplying power from the outside. The terminal block 30 is supported by a terminal block support 40, which will be described later. With this configuration, the height of the power supply unit 20 can be designed to be lower than that of a lighting fixture in which the terminal block is disposed on top of the power supply unit.

[0034] [Terminal block support] The terminal block support 40 will be described with reference to FIGS.

[0035] As described above, the terminal block support 40 is a member that extends horizontally from the upper surface of the power supply unit 20 and supports the terminal block 30. The terminal block support 40 is configured to rotate from a state in which it extends horizontally from the power supply unit 20 (hereinafter, referred to as a horizontal support state (see FIG. 4)) to a state in which it stands vertically from the power supply unit 20 (hereinafter, referred to as a vertical support state (see FIG. 3)).

[0036] In other words, in the lighting fixture 100, the terminal block support 40 can be switched between a horizontal support state and a vertical support state. As a result, the lighting fixture 100 can be installed even in a ceiling recess hole with a small diameter and a low height above the ceiling surface CS, as will be described in detail later.

[0037] The terminal block support 40 has a power supply unit fixing plate 41 fixed to the upper surface of the power supply case 21 of the power supply unit 20, a connecting plate 42 supported for free rotation relative to the power supply unit fixing plate 41 by a first rotating shaft 44, and a terminal block support plate 43 supported for free rotation relative to the connecting plate 42 by a second rotating shaft 45, and has the terminal block 30 fixed to its underside, as will be described in detail later.

[0038] When the terminal block support body 40 extends horizontally from the power supply unit 20, rotation of the connecting plate 42 relative to the power supply unit fixing plate 41 is restricted, and rotation of the terminal block support plate 43 relative to the connecting plate 42 is restricted. On the other hand, when the terminal block support body 40 extends vertically from the power supply unit 20, rotation of the connecting plate 42 relative to the power supply unit fixing plate 41 is restricted, and rotation of the terminal block support plate 43 relative to the connecting plate 42 is restricted.

[0039] The power supply unit fixing plate 41 is, for example, made of metal and is an L-shaped plate. The power supply unit fixing plate 41 is fixed to the upper surface of the power supply case 21 of the power supply unit 20. A first rotating shaft 44 is supported at the tip of the power supply unit fixing plate 41. A horizontal restriction portion 41A that restricts the rotation of the connecting plate 42 in a horizontally supported state is formed at the tip of the power supply unit fixing plate 41. The horizontal restriction portion 41A is formed by bending a part of the power supply unit fixing plate 41 upward.

[0040] The connecting plate 42 is, for example, made of metal and is a plate material formed in a short shape. A first rotating shaft 44 is journaled at the base end of the connecting plate 42. A vertical regulating portion 42A that regulates the rotation of the connecting plate 42 in a vertically supported state is formed at the base end of the connecting plate 42. The vertical regulating portion 42A is formed by bending a part of the connecting plate 42 upward. A second rotating shaft 45 is journaled at the tip of the connecting plate 42. A vertical regulating portion 42B that regulates the rotation of the terminal block support plate 43 in a vertically supported state is formed at the tip of the connecting plate 42. The vertical regulating portion 42B is formed by bending a part of the connecting plate 42 downward.

[0041] The terminal block support plate 43 is, for example, made of metal, and is a plate material formed in a long shape longer than the connecting plate 42. The terminal block 30 is fixed to the upper surface of the tip of the terminal block support plate 43. A second rotating shaft 45 is supported at the base end of the terminal block support plate 43. A horizontal regulating portion 43A is formed at the base end of the terminal block support plate 43. The horizontal regulating portion 43A is formed by bending a part of the terminal block support plate 43 upward. The horizontal regulating portion 41A and the horizontal regulating portion 43A can ensure a constant insulation distance between the terminal block 30 and, for example, a ceiling material regulated by the Electrical Safety Act, regardless of the height above the ceiling.

[0042] [How to install lighting fixtures] A method for installing lighting fixture 100 will be described with reference to FIGS.

[0043] When installing the lighting fixture 100 in a ceiling recessed hole, first, as shown in FIG. 3, the terminal block support 40 is supported vertically and inserted into the ceiling recessed hole from the terminal block 30, then the terminal block support 40 is rotated from the vertical support state to the horizontal support state while the power supply unit 20 is inserted into the ceiling recessed hole, and then, as shown in FIG. 3, the light source unit 10 is inserted into the ceiling recessed hole and fixed to the ceiling recessed hole by the mounting spring 18.

[0044] In recent years, the diameter of the ceiling recession hole of a downlight has become smaller. For example, when the diameter of the ceiling recession hole and the diameter of the power supply unit are approximately the same, it is necessary to insert the power supply unit vertically into the ceiling recession hole. In this case, when the ceiling depth (the height of the upper side of the ceiling surface CS) is low, it is not possible to place the terminal block on the upper surface of the power supply unit. On the other hand, in lighting fixtures, the terminal block is sometimes supported by a terminal block support member extending horizontally from the power supply unit. When the diameter of the ceiling recession hole and the diameter of the power supply unit are approximately the same, it is very difficult to insert a lighting fixture with such a configuration into the ceiling recession hole.

[0045] According to the lighting fixture 100 of this embodiment, as described above, the power supply unit 20 can be inserted into the ceiling recess hole while rotating the terminal block support 40 from a vertical support state to a horizontal support state, so that the lighting fixture can be installed even when the ceiling depth is low.

[0046] [summary] The present disclosure is further illustrated by the following embodiments. Configuration 1: A lighting fixture that is embedded in an embedding hole formed in a mounting surface, a light source unit having a light source; a power supply unit for supplying power to the light source; a terminal block to which an internal power supply line for supplying power to the power supply unit and an external power supply line for supplying power from an external source are electrically connected; a terminal block support member extending horizontally from the power supply unit and supporting the terminal block; Equipped with the terminal block support rotates from a state in which it extends horizontally from the power supply unit to a state in which it extends vertically from the power supply unit; Lighting fixtures. Configuration 2: The terminal block support is restricted from rotating when extended horizontally from the power supply unit. 1. The lighting device according to claim 1, Lighting fixtures. Configuration 3: 3. The lighting device according to claim 1 or 2, The terminal block support is restricted from rotating when extended vertically from the power supply unit. Lighting fixtures.

[0047] Although the present disclosure has been described above based on the embodiments, the present disclosure is not limited to the above-mentioned embodiments. In addition, the present disclosure also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art can conceive, and forms realized by arbitrarily combining the components and functions of each embodiment within the scope of the present disclosure. [Explanation of symbols]

[0048] 10 light source unit, 11 light source, 12 board, 13 light emitting portion, 14 holder, 15 frame, 15A reflecting portion, 15B heat dissipation portion, 15C holder holding portion, 15D flange portion, 15E mounting spring holding portion, 16 top plate, 17 light-transmitting cover, 18 mounting spring, 19 connecting power line, 20 power supply unit, 21 power supply case, 22 drive circuit, 30 terminal block, 31 internal power line, 40 terminal block support, 41 power supply unit fixing plate, 41A horizontal regulation portion, 42 connecting plate, 42A vertical regulation portion, 42B vertical regulation portion, 43 terminal block support plate, 43A horizontal regulation portion, 100 lighting fixture, CS ceiling surface

Claims

1. A lighting fixture that is embedded in an embedding hole formed in a mounting surface, a light source unit having a light source; a power supply unit for supplying power to the light source; a terminal block to which an internal power supply line for supplying power to the power supply unit and an external power supply line for supplying power from an external source are electrically connected; a terminal block support member extending horizontally from the power supply unit and supporting the terminal block; Equipped with the terminal block support rotates from a state in which it extends horizontally from the power supply unit to a state in which it extends vertically from the power supply unit; Lighting fixtures.

2. 2. A lighting device according to claim 1, The terminal block support is restricted from rotating when extended horizontally from the power supply unit. Lighting fixtures.

3. 3. A lighting device according to claim 1 or 2, The terminal block support is restricted from rotating when extended vertically from the power supply unit. Lighting fixtures.

Images