TWM517286U - Lighting fixture - Google Patents

Description

Lighting fixture

The present invention relates to a lighting fixture.

Solid-state light-emitting elements such as light-emitting diodes (LEDs) are widely used in lighting fixtures. For example, Japanese Laid-Open Patent Publication No. 2012-146666 discloses a lighting fixture in which a light source substrate on which an LED, that is, a light source, is mounted, and a power source substrate on which a power supply component is mounted is connected by a wire harness. The substrates are covered with a metal cover.

The lighting fixture of the present invention includes an appliance body having a device mounting portion at a center portion, a circuit board, a power supply area cover, and a light-transmitting cover. The circuit board has a first surface and a second surface facing away from the first surface, and the first surface has a power supply region in which a plurality of electronic components are mounted and surrounds the device mounting portion, and a plurality of LEDs are mounted and surround the power supply region region. The circuit board is supported by the luminaire main body in a direction opposite to the luminaire main body on the second surface around the appliance mounting portion. The power supply area cover has a frustum shape, has an opening on the bottom surface of the frustum shape, and covers the power supply area with an opening. The translucent cover has an annular shape and has an annular inner peripheral portion that overlaps the peripheral end portion of the opening end of the opening of the power supply region cover and covers the light-emitting region.

With the above structure, a lighting device with a small diameter can be realized.

[Implementation of new forms]

Prior to the description of the embodiments of the present invention, a lighting fixture of the related art will be described.

For example, in the lighting fixture of the invention disclosed in Japanese Laid-Open Patent Publication No. 2012-146666, it is necessary to separately mount a power source substrate and a light-emitting board of the power source electronic component and the light source LED. In order to connect the power supply substrate and the light-emitting substrate, a wire harness is required. Therefore, the number of parts of the lighting fixture increases. In the assembly of lighting fixtures, the connection of the wire harness is required.

Furthermore, in order to arrange the circuit patterns covering the electronic component and the power supply substrate and the power supply substrate, the outer diameter of the lighting fixture is increased.

Hereinafter, the lighting fixture of the embodiment will be described with reference to the drawings. Further, the embodiments described below show one preferred embodiment.

The constituent elements of the independent request items that are not described in the most basic concept of the present invention in the constituent elements of the embodiment are described in arbitrary constituent elements. Therefore, the numerical values, shapes, materials, constituent elements, arrangement positions of the constituent elements, connection forms, engineering, engineering order, and the like shown in the following embodiments are not limited to the present invention.

Further, each drawing is a schematic view, and the drawings are not necessarily shown strictly. In the respective drawings, substantially the same configurations are denoted by the same reference numerals, and the repeated description is omitted or simplified.

(Embodiment) A lighting fixture 10 according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is an exploded perspective view of the lighting fixture 10 viewed from the irradiation direction. 2 is an exploded perspective view of the lighting fixture 10 as viewed from the opposite direction of the illumination direction. 3 is a cross-sectional view showing a state in which the lighting fixture 10 is assembled. Fig. 4 is an enlarged view of a portion I of Fig. 3.

The lighting fixture 10 includes an appliance body 14 having a fixture mounting portion 14A at a center portion, and a circuit board 16 supported by the fixture body 14. The fixture body 14 is mounted to the ceiling 11 of the material.

The circuit board 16 is a circular flat plate having a through hole at the center. The circuit board 16 surrounds and supports and supports the device mounting portion 14A provided in the center portion of the device body 14 having a circular disk shape as a whole. The circuit board 16 has a first surface 16A and a second surface 16B that faces away from the first surface 16A. The circuit board 16 has a power source region 17 surrounding the fixture mounting portion 14A and a light emitting region 18 surrounding the power source region 17 on the first surface 16A. A plurality of electronic components are mounted in the power supply area 17. A plurality of LEDs are mounted in the light emitting region 18. The circuit board 16 is disposed so that the second surface 16B faces the luminaire main body 14 and is disposed around the appliance mounting portion 14A.

A ceiling side mounting member 12 is attached to the ceiling 11. The luminaire side mounting member 15 is attached and housed inside the appliance mounting portion 14A. The lighting fixture 10 can be fixed to the ceiling 11 by attaching the lighting fixture side mounting member 15 to the ceiling side mounting member 12.

In a state where the fixture body 14 is attached to the ceiling 11, the cushion 13 between the ceiling 11 and the fixture body 14 can be interposed to suppress the shake of the fixture body 14.

Further, the lighting fixture 10 includes a power supply area cover 19 that covers the power supply area 17 of the circuit board 16, a light-transmitting cover 23 that covers the light-emitting area 18 of the circuit board 16, and a cover 25 that is attached to the apparatus body 14.

The cover 25 is a milky white translucent member. The cover 25 has an opening 251 and has a hemispherical shape that protrudes in the light emission direction. The cover 25 is attached to the luminaire main body 14 from below (light emission direction). The luminaire main body 14 has a hood attachment member 26 at a peripheral portion of the back surface 142 (surface in the light emission direction) of the ceiling mounting surface 141. The cover 25 has an engaging projection 25A at the end of the opening 251 (three of the six are used). The cover 25 is detachably attached to the luminaire main body 14 by engaging the engagement projection 25A with the cover attachment member 26. The luminaire main body 14, the circuit board 16, the power source area cover 19, and the translucent cover 23 are covered with the cover 25.

The luminaire body 14 has a circular plate shape when viewed in plan, and has a through opening at the center portion. An instrument mounting portion 14A that houses the lighting fixture side mounting member 15 is provided at a central portion (through opening) of the fixture body 14. An annular contact surface 21 that bulges in the direction of the circuit board 16 is provided around the fixture mounting portion 14A in the fixture body 14. The circuit board 16 is joined to the fixture body 14 at least at the contact surface 21.

Further, in the first embodiment, an example in which the luminaire main body 14 having a disk shape viewed in plan is directly attached to the ceiling 11 will be described, but the invention is not limited thereto. The appliance body can also be angled in plan view. The fixture body may be engaged with the ceiling side mounting member 12 by the engaging member. The fixture body can also be suspended by wires by the snap members. The body of the appliance can also be suspended from the ceiling using a chain or a metal wire or the like.

The ceiling side mounting portion 12 is coupled to the electric wire on the back surface of the ceiling 11. At the luminaire side mounting member 15, a wiring (not shown) to which the connector is attached is pulled out below the luminaire body 14. The procedure for attaching the lighting fixture 10 to the ceiling 11 is to connect the lighting fixture side mounting member 15 to the ceiling side mounting member 12, and then connect the connector of the lighting fixture side mounting member 15 to the connector provided on the circuit board 16. 28. By this procedure, the wires of the ceiling 11 can be electrically connected to the circuit board 16.

Further, the ceiling side mounting member 12 and the luminaire side mounting member 15 are omitted in FIGS. 3 and 4 .

The circuit board 16 has an annular shape, and the center portion has an opening formed by the hollow portion 29. The appliance mounting portion 14A of the luminaire main body 14 is disposed in the hollow portion 29 (see FIG. 4). The circuit board 16 is disposed in the luminaire main body 14 so as to surround the fixture mounting portion 14A provided at the center of the luminaire main body 14 .

The first surface 16A, which is the surface of the circuit board 16, has a power supply region 17 and a light-emitting region 18. The back surface, that is, the second surface 16B, has a light-emitting region back surface 16C joined to at least the fixture body 14 at a position facing away from the light-emitting region 18.

The power source region 17 is provided on the first surface 16A of the circuit board 16 at a position closer to the fixture mounting portion 14A than the light-emitting region 18, and the light-emitting region 18 is provided at a position farther from the appliance mounting portion 14A than the power source region 17.

That is, on the circuit board 16, the power source region 17 is disposed to surround the appliance mounting portion 14A (see FIG. 1), and the light-emitting region 18 is disposed to surround the power source region. With this configuration, the power source region 17 and the light-emitting region 18 are disposed so as not to overlap on the same circuit board 16.

A plurality of electronic components 34 (including connectors 28) constituting the power supply unit 33 are mounted in the power supply region 17. The lead protrusions 35 of the electronic component 34 mounted in the power supply area 17 protrude to the second surface 16B of the circuit board 16. A plurality of LEDs 37 constituting the light-emitting portion 36 are mounted on the light-emitting region 18. The LED 37 is electrically connected to the power supply unit 33 via the circuit pattern 38. The LED 37 emits light by the power supplied from the power supply unit 33.

With this configuration, since the power supply region 17 and the light-emitting region 18 can be electrically connected by the circuit pattern 38, it is not necessary to connect the power source region 17 and the light-emitting region 18 with a wire harness. The number of parts can be reduced and the number of combinations can be simplified.

In the second surface 16B of the circuit board 16, the light-emitting region back surface 16C contacts the contact surface 21 of the fixture body 14 (see FIG. 4). The contact surface 21 is in contact with the light-emitting region back surface 16C at a portion corresponding to the circuit pattern 38 of the light-emitting portion 36. With this configuration, the heat emitted from the light-emitting portion 36 can be conducted to the contact surface 21 with good efficiency by the circuit pattern 38.

A heat sink may be disposed between the rear surface 16C of the light emitting region and the contact surface 21 (the second surface 16B). With this configuration, even if the contact surface 21 or the circuit board 16 has irregularities and curvatures, the contact area between the contact surface 21 and the circuit board 16 can be increased. That is, the heat dissipation effect can be improved.

The light-emitting region 18 of the circuit board 16 is covered with a resin-made light-transmitting cover 23. The translucent cover 23 is an annular member and covers the light-emitting region 18 that is arranged in a ring shape on the circuit board 16 . An annular outer peripheral portion 51 and an annular inner peripheral portion 52 are provided on the outer circumference and the inner circumference of the translucent cover 23. The annular outer peripheral portion 51 and the annular inner peripheral portion 52 are in contact with the first surface 16A of the circuit board 16 . In the translucent cover 23, a dome portion 53 in which a plurality of LEDs 37 are collectively covered in a non-contact manner is provided between the annular outer peripheral portion 51 and the annular inner peripheral portion 52. The translucent cover 23 has a plurality of standing portions 54 connected to the circuit board 16 in the dome portion 53. The annular inner peripheral portion 52 of the translucent cover 23 projects from the inner peripheral edge 53A of the dome portion 53 toward the power source region 17 (i.e., the power source region cover 19). The power source region 17 of the circuit board 16 is covered with a metal power source region cover 19 to ensure incombustibility. The power supply area cover 19 has a frustum shape having an opening 19A on the bottom surface. The power supply area cover 19 covers the power supply area 17 with the opening 19A facing the power supply area 17. The power supply area cover 19 has an open end peripheral portion 43 extending in the direction of the light emitting region 18, a side surface of the frustum shape, that is, an inclined surface 44, and a top surface 45 of the frustum shape. The cover bottom 45 has a surface having a through hole 19B at the center. The position of the lighting fixture side mounting member 15 can be visually confirmed by the opening 19A and the through hole 19B in a state where the cover 25 is removed. Further, in the present embodiment, an example in which the power source region cover 19 has a truncated cone shape will be described, but the present invention is not limited thereto. The power supply area cover 19 may also have other shapes such as a polygonal frustum.

The open end peripheral portion 43 of the power supply area cover 19 is annular in plan view. The translucent cover 23 and the power source area cover 19 are superposed on the first surface 16A of the circuit board 16 in the order of the translucent cover 23 and the power source area cover 19. The open end peripheral portion 43 is disposed on the first surface 16A of the circuit board 16 via the annular inner peripheral portion 52 of the light-transmitting cover 23 . In other words, the annular inner peripheral portion 52 of the translucent cover 23 is interposed between the first surface 16A of the circuit board 16 and the open end peripheral portion 43 of the power source region cover 19.

With this configuration, since the power supply area cover 19 is not directly joined to the circuit board 16, the insulating form of the power supply area cover 19 and the circuit pattern 38 is maintained. It is not necessary to increase the opening diameter of the power supply area cover 19 to open the circuit pattern 38 of the open end portion 43 and the power supply area 17. Therefore, the diameter of the appliance can be suppressed to a small diameter.

The power supply area cover 19 may also have at least one of light reflectivity and light diffusibility. The light that is incident on the LEDs 37 of the power source area cover 19 can be reflected and diffused toward the cover 25.

The translucent cover 23 may have an upright portion 54 that protrudes from the inner peripheral edge 52A in the opposite direction of the circuit board 16 in the annular inner peripheral portion 52. The standing portion 54 protrudes in the opposite direction of the circuit board 16 along the inclined surface 44 of the power source area cover 19 to come into contact with the inclined surface 44.

With this configuration, when the power supply area cover 19 is mounted, the side surface of the power supply area cover 19, that is, the inclined surface 44 contacts the vertical portion 54, the vertical portion 54 can be positioned to position the power supply area cover 19, and the power supply area cover 19 can be easily assembled.

A sleeve 47 is disposed between the lid bottom 45 and the luminaire body 14. The sleeve 47 has a cylindrical shape and surrounds the luminaire side mounting member 15.

Further, the lighting fixture of the present invention is not limited to the embodiment, and can be appropriately modified or improved. For example, a lighting fixture, a building material, an appliance body, a circuit board, a power supply area, a light emitting area, a power area cover, a translucent cover, a wire, a power supply part, an electronic part, a light emitting part, an LED, and a power area cover flange portion The shape and structure of the inner flange portion and the standing portion of the light-transmitting cover can be appropriately changed.

10‧‧‧Lighting appliances
11‧‧‧ ceiling
12‧‧‧Ceiling side mounting members
13‧‧‧ cushion
14‧‧‧ Appliance body
14A‧‧‧Equipment Installation Department
15‧‧‧Lighting side mounting members
16‧‧‧ circuit board
16A‧‧‧1st
16B‧‧‧2nd
16C‧‧‧Back of the illuminated area
17‧‧‧Power area
18‧‧‧Lighting area
19‧‧‧Power area cover
19A‧‧‧ Opening
19B‧‧‧through holes
21‧‧‧Contact surface
23‧‧‧Translucent cover
25‧‧ hood
25A‧‧‧ snap protrusion
26‧‧‧ hood mounting components
28‧‧‧Connector
29‧‧‧ Hollow
33‧‧‧Power Supply Department
34‧‧‧Electronic parts
35‧‧‧Wire protrusion
36‧‧‧Lighting Department
37‧‧‧LED
38‧‧‧ circuit graphics
43‧‧‧Open end
44‧‧‧ sloped surface
45‧‧‧ Cover bottom
47‧‧‧ casing
51‧‧‧Circular outer circumference
52‧‧‧Circular inner circumference
52A‧‧‧ inner circumference
53‧‧‧round cover
53A‧‧‧ inner periphery
54‧‧‧ erection
141‧‧‧Ceiling mounting surface
142‧‧‧Back face
251‧‧‧ openings

Fig. 1 is an exploded perspective view of the lighting fixture of the present invention viewed from the direction of illumination. Figure 2 is an exploded perspective view of the lighting fixture of Figure 1 as seen from the opposite direction of the illumination direction. Fig. 3 is a cross-sectional view showing a state in which the lighting fixture of Fig. 1 is assembled. Fig. 4 is an enlarged view of a portion I of Fig. 3.

11‧‧‧ ceiling

13‧‧‧ cushion

14‧‧‧ Appliance body

14A‧‧‧Equipment Installation Department

16‧‧‧ circuit board

16A‧‧‧1st

16B‧‧‧2nd

16C‧‧‧Back of the illuminated area

17‧‧‧Power area

18‧‧‧Lighting area

19‧‧‧Power area cover

21‧‧‧Contact surface

23‧‧‧Translucent cover

29‧‧‧ Hollow

33‧‧‧Power Supply Department

34‧‧‧Electronic parts

35‧‧‧Wire protrusion

36‧‧‧Lighting Department

37‧‧‧LED

43‧‧‧Open end

44‧‧‧ sloped surface

45‧‧‧ Cover bottom

47‧‧‧ casing

51‧‧‧Circular outer circumference

52‧‧‧Circular inner circumference

52A‧‧‧ inner circumference

53‧‧‧round cover

53A‧‧‧ inner periphery

54‧‧‧ erection

Claims (5)

A lighting fixture comprising: an appliance body having an appliance mounting portion at a central portion thereof; and a circuit board having a first surface and a second surface facing away from the first surface, wherein the first surface includes a plurality of The electronic component surrounds a power supply area of the appliance mounting portion, and a light-emitting area in which a plurality of LEDs are mounted and surrounds the power supply area, and the circuit board faces the appliance body around the appliance mounting portion The method is supported by the main body of the appliance; the power supply area cover is in the shape of a frustum, has an opening on the bottom surface of the frustum shape, and covers the power supply area; and the translucent cover has an annular inner circumference for the inner circumference The light-emitting cover is overlapped with the light-emitting area; the light-transmitting cover and the power supply area cover the first surface of the circuit board, and the light-transmitting cover and the power supply area cover are overlapped in this order. The annular inner peripheral portion of the cover is interposed between the first surface of the circuit board and the peripheral end portion of the opening end of the power supply region cover. The lighting fixture of claim 1, wherein the light-transmitting cover has an upright portion that protrudes in a direction opposite to the circuit board in the annular inner peripheral portion. The lighting fixture of claim 2, wherein the standing portion is joined to a side of the power supply area cover. The lighting fixture of claim 1, wherein the power supply area cover has at least one of light reflectivity and light diffusibility. The lighting fixture of claim 1, wherein a heat sink is disposed between the back surface of the light emitting region and the second surface.