Lighting fixture

Abstract

To provide a lighting fixture capable of improving fixing stability of a light source.SOLUTION: A lighting fixture 100 is embedded in a ceiling-embedded hole formed in a ceiling surface, and includes a light source 10, a socket 20 to which the light source 10 is mounted, and a cylindrical frame 30 that is embedded in the ceiling-embedded hole and has a top surface part 31 on a lower surface of which the socket 20 is provided. The light source 10 has two power supply pins 14. The socket 20 has two terminal parts 25B to which the two power supply pins 14 are respectively mounted, and a distance P between the terminal parts 25B is 25 to 40 mm.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture that is embedded and disposed in an embedding hole formed in a surface to be disposed.

Background Art

[0002] As a lighting fixture, for example, a small-diameter lighting fixture (downlight) that is embedded and disposed in a ceiling embedding hole formed in a ceiling surface or the like and irradiates light downward (floor, ground, wall, etc.) is known. On the other hand, among general-purpose lighting fixtures, a light source with a GX53-type base having two electrode pins is known (for example, Patent Document 1). Since the GX53-type base can be designed to have a small base height, the lighting fixture can be designed to be thin.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in recent years, the diameter of the ceiling embedding hole of the downlight has been further reduced. Therefore, for example, in a small-diameter lighting fixture embedded and disposed in a ceiling embedding hole with a diameter of 75 mm, it may be considered to adopt the above-described light source with a GX53-type base. However, in a small-diameter lighting fixture embedded and disposed in a ceiling embedding hole with a diameter of 75 mm, it is difficult to attach a light source with a GX53-type base having a distance of 53 mm between two electrode pins due to restrictions on the dimensions in the radial direction.

[0005] Therefore, even in a small-diameter lighting fixture, a light source having a structure similar to that of the GX53 type is desired. However, when the distance between two electrode pins is reduced, the fixing stability of the light source when the light source is attached to the unit decreases.

[0006] Therefore, an object of the present disclosure is to provide a lighting fixture capable of improving the fixed stability of a light source.

Means for Solving the Problems

[0007] The lighting fixture according to the present disclosure is a lighting fixture embedded and disposed in an embedding hole formed in a surface to be disposed, and includes a light source, a socket on which the light source is mounted, and a cylindrical frame embedded in the embedding hole and having a top surface portion provided with the socket on the lower surface. The light source has two power supply pins, the socket has two pin mounting portions on which the two power supply pins are respectively mounted, and the distance between the pin mounting portions is 25 to 40 mm.

Effects of the Invention

[0008] According to the lighting fixture of the present disclosure, the fixed stability of the light source can be improved.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0010] Hereinafter, a lighting fixture 100 which is an example of an embodiment will be described with reference to the drawings. Note that each of the embodiments described below shows an example of the present disclosure. Therefore, the numerical values, components, arrangements and connection forms of components, etc. shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Thus, among the components in the following embodiments, components not described in the independent claims indicating the most superior concept of the present disclosure are described as optional components.

[0011] Note that each figure is a schematic diagram and is not necessarily drawn precisely. In each figure, the same reference numerals are given to substantially the same configurations, and duplicate explanations may be omitted or simplified. Also, in this specification, the terms "upper" and "lower" do not necessarily refer to the upward (vertically upward) and downward (vertically downward) directions in an absolute spatial sense.

[0012] [Overall Configuration of Lighting Fixture] The overall configuration of the lighting fixture 100 will be described with reference to FIGS. 1 and 2.

[0013] The lighting fixture 100 is, for example, a downlight that irradiates light downward (floor, ground, wall, etc.). The lighting fixture 100 is, for example, disposed on the ceiling surface of a building. The lighting fixture 100 of the present embodiment is a ceiling-embedded lighting fixture, and is, for example, embedded and disposed in a ceiling-embedded hole formed in the ceiling surface. The ceiling-embedded hole of the present embodiment is circular in plan view. Also, the lighting fixture 100 of the present embodiment is a small-diameter lighting fixture disposed in a relatively small-diameter (for example, 75 mm Φ) ceiling-embedded hole. However, the lighting fixture of the present disclosure may be disposed on an attachment surface other than the ceiling-embedded surface. Also, the present disclosure may be applied to lighting fixtures other than ceiling-embedded lighting fixtures, and may be applied to lighting fixtures other than downlights.

[0014] The lighting fixture 100 includes a light source 10, a socket 20 on which the light source 10 is mounted, a cylindrical frame 30 having a top surface portion 31 that is embedded in a ceiling recess hole and on which the socket 20 is provided on the lower surface, a top plate 40 provided on the upper surface of the top surface portion 31 of the frame 30, an internal power supply line 51 provided on an extension portion 43 of the top plate 40 and supplying power to the socket 20, a terminal block 50 to which an external power supply line (not shown) for supplying power from the outside is electrically connected, and a mounting spring 60 for fixing the lighting fixture 100 to the ceiling recess hole.

[0015] [Light source unit] The light source 10 will be described with reference to FIGS. 1 to 3.

[0016] The light source 10 is, for example, an LED (Light Emitting Diode) light source. The light source 10 includes a housing 11, a light emitting portion 12 held by the housing 11, a lens 13 disposed below the light emitting portion 12, two power supply pins 14 for receiving power to cause the light emitting portion 12 to emit light, and a drive circuit 15 for driving the light emitting portion 12.

[0017] The housing 11 is a member that constitutes the outer shell of the light source 10. The housing 11 is made of resin or metal and is formed in a substantially cylindrical shape. The housing 11 holds the light emitting portion 12 and the lens 13. Further, a drive circuit 15 is accommodated in the housing 11. A convex portion 11A protruding upward is formed on the top surface of the housing 11. The convex portion 11A is formed in a substantially cylindrical shape. A capacitor 16, which is a part of the drive circuit 15, is accommodated in the convex portion 11A. With such a configuration, the capacitor 16, which is a high-temperature component compared to other components of the drive circuit 15, can be efficiently cooled.

[0018] The light emitting portion 12 emits light by the power supplied from the drive circuit 15. The light emitting portion 12 emits, for example, white light. The light emitting portion 12 is constituted by, for example, LEDs. The light emitting portion 12 includes a substrate and one or a plurality of LED elements mounted on the substrate. The LED element may be a surface mount type LED package or an LED chip.

[0019] The lens 13 is an optical member having translucency and transmits the light emitted from the light emitting part 12. Further, the lens 13 is a condenser lens that condenses the light emitted from the light emitting part 12 and is, for example, a Fresnel lens. The lens 13 is composed of a translucent material having translucency and is composed of, for example, a transparent resin material such as acrylic or polycarbonate, or a glass material.

[0020] The power supply pin 14 is a conductive pin and receives power for causing the light emitting part 12 to emit light from outside the light source 10. The power supply pin 14 and the drive circuit 15 are electrically connected by an electric wire (not shown) housed in the housing 11. The power supply pin 14 is a pin having a T-shaped cross section with a disk-shaped enlarged diameter part at the tip. Also, the distance between the two power supply pins 14 is the same as the distance P between the terminal parts 25B as pin mounting parts, which will be described in detail later.

[0021] Further, the power supply pin 14 is a connection pin for connecting the light source 10 to the socket 20. The power supply pin 14 is electrically connected to the socket 20. Although details will be described later, the power supply pin 14 is locked to the terminal part 25B as the pin mounting part of the connection terminal 25 provided in the socket 20 and is electrically and mechanically connected to the terminal part 25B. Also, when the power supply pin 14 is connected to the terminal part 25B, the light source 10 is held by the socket 20.

[0022] The drive circuit 15 is a power supply circuit for causing the light emitting part 12 to emit light and supplies predetermined power to the light emitting part 12. The drive circuit 15 has a capacitor 16 which is a high-temperature component compared to other components of the drive circuit 15. The drive circuit 15, for example, converts the AC power (for example, commercial AC power of AC100V) received by the power supply pin 14 into DC power and supplies the DC power to the light emitting part 12.

[0023] [Socket] The socket 20 will be described with reference to FIGS. 2 to 5.

[0024] As shown in FIGS. 2 to 5, the socket 20 is a member to which the light source 10 is attached as described above. Further, the socket 20 is a member that supplies power to the light source 10. The socket 20 is fixed to the lower surface of the top surface portion 31 of the frame 30. The socket 20 has a housing 21 and two connection terminals 25, the details of which will be described later.

[0025] As shown in FIGS. 3 to 5, the housing 21 is a member that forms the outer contour of the socket 20. The housing 21 is made of, for example, resin and is formed in a ring shape having a top surface. The housing 21 has an upper cover 21A that covers the upper side of the housing 21 and a lower cover 21B that covers the lower side of the housing 21. Two long holes 22 and a recess 23, the details of which will be described later, are formed in the lower cover 21B. The long holes 22 are formed in a substantially arc shape on the bottom surface of the housing 21. The long holes 22 each have a pin insertion hole 22A, a pin mounting hole 22B, and a pin guide hole 22C, the details of which will be described later.

[0026] As shown in FIG. 4, the pin insertion hole 22A is formed with an enlarged diameter at one end of the long hole 22. The pin mounting hole 22B is formed at the other end of the long hole 22 and is formed at a position where the terminal portion 25B as the pin mounting portion of the connection terminal 25 described later can be seen. The pin guide hole 22C communicates the pin insertion hole 22A and the pin mounting hole 22B and is formed in an arc shape along the pin guide portion 25C of the connection terminal 25 described later.

[0027] Here, when the light source 10 is attached to the socket 20, the light source 10 is inserted into the socket 20 and rotated with respect to the socket 20, whereby the light source 10 is attached to the socket 20. When the light source 10 is inserted into the socket 20, the power supply pin 14 is inserted into the pin insertion hole 22A of the long hole 22. When the light source 10 is rotated with respect to the socket 20, the power supply pin 14 is guided by the pin guide hole 22C of the long hole 22, and after the light source 10 is rotated with respect to the socket 20, the power supply pin 14 reaches the pin mounting hole 22B.

[0028] The recessed portion 23 is formed at approximately the center of the socket 20. The recessed portion 23 is formed in a circular shape in plan view. When the light source 10 is attached to the socket 20, the convex portion 11A of the housing 11 of the light source 10 is fitted into the recessed portion 23. Thereby, the capacitor 16, which is a component of the drive circuit 15 of the light source 10, can be accommodated at approximately the center of the socket 20, and the space occupied by the light source 10 and the socket 20 can be reduced.

[0029] As shown in FIGS. 4 and 5, the connection terminal 25 is a terminal that supplies the power supplied from the internal power line 51 to the power supply pin 14. The connection terminal 25 is a member made of a conductive metal. The connection terminal 25 is accommodated in the upper cover 21A. The connection terminal 25 is accommodated at a position corresponding to the long hole 22 in the housing 21. The connection terminal 25 has a pin introduction portion 25A, a terminal portion 25B as a pin mounting portion, and a pin guiding portion 25C, the details of which will be described later.

[0030] The pin introduction portion 25A is disposed in the middle of the pin guiding hole 22C of the long hole 22, and is the portion into which the power supply pin 14 is introduced while the light source 10 is being inserted into the socket 20 and rotated.

[0031] The terminal portion 25B as a pin mounting portion is disposed at a position corresponding to the pin mounting hole 22B of the long hole 22 as described above, and is the portion where the power supply pin 14 is locked after the light source 10 is rotated with respect to the socket 20. The terminal portion 25B holds the power supply pin 14 and is electrically connected to the power supply pin 14. Further, the terminal portion 25B is electrically connected to the internal power line 51, and the internal power line 51 and the power supply pin 14 are electrically connected via the terminal portion 25B. Further, when the power supply pin 14 is locked to the terminal portion 25B, the light source 10 is held by the socket 20.

[0032] Here, the terminal portion 25B as the pin mounting portion is arranged such that the interval P between the terminal portions 25B is 25 to 40 mm, preferably arranged such that the interval P between the terminal portions 25B is 25 to 30 mm. Thereby, when the light source 10 is mounted on the socket 20, the fixing stability of the light source 10 with respect to the socket 20 can be improved.

[0033] Further, the terminal portion 25B as the pin mounting portion is arranged such that when a JIS standard test finger contacts the pin mounting hole 22B of the long hole 22, the test finger does not contact the terminal portion 25B. Thereby, accidents such as electric shock when removing the light source 10 from the socket 20 or attaching (mounting) the light source 10 to the socket 20 can be prevented.

[0034] The pin guide portion 25C is arranged at a position corresponding to the pin guide hole 22C of the long hole 22 as described above, and is a portion where the power supply pin 14 is guided when the light source 10 is rotated with respect to the socket 20.

[0035] [Frame] Again, the frame 30 will be described with reference to FIGS. 1 and 2.

[0036] The frame 30 is a member through which the light emitted from the light source 10 passes. The light emitted from the light source 10 is emitted to the outside of the frame 30 through the inside of the frame 30. The frame 30 may be configured such that the inner surface of the frame 30 is a light reflecting surface and reflects the light emitted from the light source 10. The frame 30 is formed of a metal material such as aluminum or iron, for example. However, the frame of the present disclosure may be formed of a resin material such as polybutylene terephthalate (PBT).

[0037] The frame 30 is embedded in the ceiling embedding hole as described above. The frame 30 is formed in a cylindrical shape having a top surface portion 31 provided on the lower surface of the socket 20. More specifically, the frame 30 is formed in a hat shape having a top surface portion 31, and a flange portion 32 is formed at the lower end portion. A packing 35 is provided between the ceiling surface and the flange portion 32 above the flange portion 32.

[0038] [Top plate] Using FIGS. 1 and 2, the top plate 40 will be described.

[0039] The top plate 40 is a member that covers the top surface portion 31 of the frame 30 and a part of the outer peripheral surface of the frame 30. The top plate 40 is made of metal and is formed by pressing or bending a metal plate. According to the top plate 40, by covering the frame 30 with the metal top plate 40, quasi-fire resistance can be ensured. The top plate 40 has a top surface portion 41, a pair of leg portions 42, and an extension portion 43, the details of which will be described later.

[0040] The top surface portion 41 is a portion that covers the top surface portion 31 of the frame 30. An upwardly bulging portion 44 is formed on the top surface portion 41. Inside the bulging portion 44, an internal power line 51 is accommodated. Thereby, an insulation distance between the internal power line 51 and the metal top plate 40 can be ensured. Further, the bulging portion 44 is formed in an elongated hole shape along the extending direction of the extension portion 43, which will be described later, in a plan view. One end side of the bulging portion 44 extends to the vicinity of the outer periphery of the light source 30, and the other end side (the side where the extension portion 43 is formed) is formed to the outside of the frame 30. Thereby, the internal power line 51 can be extended to the outside of the frame 30.

[0041] The leg portion 42 extends downward from the top surface portion 41 and is a portion that covers a part of the outer peripheral surface of the frame 30. Further, a mounting spring 60, which will be described later, is provided at the lower end portion of the leg portion 42. The extension portion 43 extends from the top surface portion 41 to one side and is a portion that holds the terminal block 50 on the lower surface.

[0042] [Terminal block] Using FIGS. 1 and 2, the terminal block 50 will be described.

[0043] As described above, the terminal block 50 is a member that electrically connects the internal power line 51 that supplies power to the socket 20 and the external power line for supplying power from the outside. Further, as described above, the terminal block 50 is provided on the lower surface of the extending portion 43 of the top plate 40. By adopting such a configuration, for example, compared with a lighting fixture in which the terminal block is arranged above the socket, the height of the lighting fixture 100 can be designed to be smaller.

[0044] [Mounting spring] The mounting spring 60 will be described with reference to FIGS. 1 and 2.

[0045] As described above, the mounting spring 60 is a member that fixes the lighting fixture 100 to the ceiling embedding hole. In the present embodiment, for example, two mounting springs 60 are held at the lower ends of the leg portions 42 of the top plate 40. The mounting spring 60 is an elastic member, for example, a leaf spring formed of a long metal plate. When fixing the lighting fixture 100 to the ceiling embedding hole, the flange portion 32 of the frame 30 is locked to the ceiling surface, and the mounting spring 60 is elastically deformed between the side surface of the leg portion 42 of the top plate 40 and the inner surface of the ceiling embedding hole, and the resilience of the mounting spring 60 is utilized to fix the lighting fixture 100 to the ceiling embedding hole.

[0046] [Summary] The present disclosure will be further described by the following embodiments. Configuration 1: A lighting fixture embedded and disposed in an embedding hole formed in a surface to be disposed, a light source, a socket to which the light source is mounted, a cylindrical frame embedded in the embedding hole and having a top surface portion with the socket provided on the lower surface, comprising the light source has two power supply pins, the socket has two pin mounting portions to which the two power supply pins are respectively mounted, the distance between the pin mounting portions is 25 to 40 mm, lighting fixture. Configuration 2: The lighting fixture according to Configuration 1, The distance between the pin mounting parts is 25 to 30 mm, Lighting fixture. Configuration 3: The lighting fixture according to Configuration 1 or Configuration 2, A long hole for looking at the pin mounting part is formed in the socket, When a JIS standard test finger contacts the long hole, the test finger does not contact the pin mounting part, Lighting fixture. Configuration 4: The lighting fixture according to any one of Configurations 1 to 3, A top plate provided above the top surface of the frame, An internal power supply line provided on the top plate and electrically connected to a terminal block to which an external power supply line for supplying power from outside and the socket are electrically connected, Further comprising, Lighting fixture. Configuration 5: The lighting fixture according to any one of Configurations 1 to 4, A bulging part for ensuring a predetermined distance between the top plate and the internal power supply line is formed on the top plate, Lighting fixture. Configuration 6: The lighting fixture according to any one of Configurations 1 to 5, A concave part into which a convex part of the light source fits is formed between the pin mounting parts in the socket, Lighting fixture.

[0047] As described above, the present disclosure has been described based on the embodiments. However, the present disclosure is not limited to the above embodiments. In addition, forms obtained by applying various modifications conceivable by those skilled in the art to each embodiment, and forms realized by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present disclosure are also included in the present disclosure.

Explanation of reference numerals

[0048] 10 Light source, 11 Housing, 11A Protrusion, 12 Light emitting part, 13 Lens, 14 Power supply pin, 15 Drive circuit, 16 Capacitor, 20 Socket, 21 Housing, 21A Upper cover, 21B Lower cover, 22 Long hole, 22A Pin insertion hole, 22B Pin mounting hole, 22C Pin guiding hole, 23 Recess, 25 Connecting terminal, 25A Pin introduction part, 25B Terminal part (pin mounting part), 25C Pin guiding part, 30 Frame, 31 Top surface part, 32 Flange part, 35 Packing, 40 Top plate, 41 Top surface part, 42 Leg part, 43 Extension part, 44 Bulge part, 50 Terminal block, 51 Internal power line, 60 Mounting spring, 100 Lighting fixture

Claims

1. A lighting fixture embedded and disposed in an embedding hole formed on a disposed surface, comprising: a light source; a socket to which the light source is attached; a cylindrical frame embedded in the embedding hole and having a top surface portion with the socket provided on the lower surface; The lighting fixture is provided with: The light source has two power supply pins; The socket has two pin mounting portions to which the two power supply pins are respectively mounted; The distance between the pin mounting portions is 25 to 40 mm. Lighting fixture.

2. The lighting fixture according to Claim 1, wherein the distance between the pin mounting portions is 25 to 30 mm. Lighting fixture.

3. The lighting fixture according to Claim 1, wherein a long hole is formed in the socket to look into the pin mounting portion, and when a JIS standard test finger contacts the long hole, the test finger does not contact the pin mounting portion. Lighting fixture.

4. The lighting fixture according to Claim 1, further comprising: a top plate provided above the top surface portion of the frame; and a terminal block provided on the top plate, to which an internal power supply line for supplying power to the socket and an external power supply line for supplying power from the outside are electrically connected. Lighting fixture.

5. The lighting fixture according to Claim 4, wherein a bulging portion is formed on the top plate to ensure a predetermined distance between the top plate and the internal power supply line. Lighting fixture.

6. The lighting fixture according to any one of Claims 1 to 5, wherein a concave portion is formed in the socket for fitting a convex portion of the light source between the pin mounting portions. Lighting fixture. ​

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