TWI548837B - Lighting apparatus - Google Patents

Description

Lighting fixture

Embodiments of the present invention relate to a lighting fixture using a semiconductor light emitting element.

In a lighting fixture such as a ceiling light, a plurality of light emitting diode (LED) elements are disposed on a lower surface of the apparatus body, and a lower surface side of the apparatus body is covered with a shade.

Generally, in the center of the instrument body, a protruding portion that protrudes from the lower surface of the instrument body is provided by the device body itself or another cover. The protruding portion is provided with a mounting structure for mounting to a ceiling socket, or a lighting circuit for supplying lighting power to the LED element. Therefore, a plurality of LED elements are arranged on the lower surface of the fixture body in the circumferential direction around the protruding portion.

Background art literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2011-134684

However, since the protruding portion protrudes from the center of the lower surface of the fixture body, and the LED elements are disposed in the circumferential direction on the lower surface of the appliance body around the projection The surface has a problem in that light from the LED element toward the center side of the fixture body is blocked by the protruding portion, and the shadow of the protruding portion that blocks the light is easily mapped to the central portion of the globe.

The problem to be solved by the present invention is to provide a lighting fixture that can prevent the shadow of the protrusion from being mapped on the lamp cover.

The lighting fixture of the embodiment includes an appliance body, a semiconductor light emitting element, and a lamp cover. The fixture body has a projection that protrudes from the center of one side of the fixture body. The semiconductor light emitting element is disposed on one surface of the fixture body in the circumferential direction around the protruding portion. The lamp cover covers one side of the body of the device. The central portion of the globe facing the center of the fixture body is disposed at a position further away from the fixture body side than the position of the intersection point, which is an imaginary line that is connected to the peripheral portion of the projection from the semiconductor light-emitting element on the circumference. The intersection of the central sides of the appliance body.

According to the present invention, the central portion of the globe facing the center of the fixture body is disposed at a position away from the fixture body side from the position of the intersection point from the semiconductor light-emitting element on the circumference to the peripheral portion of the projection portion. The imaginary line that is connected intersects at the intersection of the center side of the appliance body, thereby preventing the shadow of the protrusion from being mapped on the lamp cover.

10‧‧‧Lighting appliances

11‧‧‧ Appliance body

12‧‧‧Substrate

13‧‧‧Lighting cover

14‧‧‧shade

14a‧‧‧Central Part

15‧‧‧ frame

16‧‧‧Box

17‧‧‧Adapter guides

18‧‧‧Lighting circuit

21‧‧‧Protruding

22‧‧‧Substrate Configuration Department

23‧‧‧Flange

24, 42‧‧‧ recess

25, 39‧‧‧ openings

26‧‧‧ window hole

27‧‧‧ claw insertion hole

28‧‧‧Installation holes

29‧‧‧Department

30‧‧‧ convex

31‧‧‧Shade Mounting Accessories

34‧‧‧ fitting holes

35‧‧‧LED components as semiconductor light-emitting elements

35a‧‧ Center

36‧‧‧reflecting surface

40‧‧‧ Cover Department

41‧‧‧Light control body

41a‧‧‧Incoming surface

41b‧‧‧Outlet

43‧‧‧ reference axis

44‧‧‧ claws

46‧‧‧screw insert hole

48‧‧‧ imaginary line

50‧‧‧Sensor window

53‧‧‧ Side wall

54‧‧‧ accommodating space

55‧‧‧ cushioning material

58‧‧‧长明灯

59‧‧‧Remote number switching switch

63‧‧‧ illuminance sensor

65‧‧‧Sensor box

P‧‧‧ intersection

FIGS. 1(a) and 1(b) are cross-sectional views showing a lighting fixture in which the protruding portions are different in height from the fixture body in FIGS. 1(a) and 1(b).

Fig. 2 is a perspective view showing an exploded state of the lighting fixture of the same.

3 is a cross-sectional view of a light distribution control body of the same lighting fixture.

Fig. 4 is a light distribution diagram using the same light distribution control body.

Hereinafter, an embodiment will be described with reference to Figs. 1 to 4 .

As shown in FIGS. 1 and 2, the lighting fixture 10 is a circular ceiling lamp that is attached to a ceiling socket provided on a ceiling surface via an adapter. Further, a direction in which the illumination device 10 is irradiated with light is referred to as a front side, and a side opposite to the front side is referred to as a back side, and the front side and the back side are opposite to the lower surface side of the installed lighting fixture 10 Corresponding to the upper surface side.

The luminaire 10 includes an luminaire main body 11 on which a substrate 12 of a light-emitting module, a light-transmitting cover 13 and a cover 14 are attached, and a frame 15 is attached to an upper surface side of the luminaire main body 11. And case 16. An adapter guide 17 and a lighting circuit 18, which are instruments mounting portions, are attached to the casing 16.

Further, the luminaire main body 11 is made of metal and formed in a disk shape. On one side, that is, the lower surface of the fixture body 11, a circular projection 21 is integrally formed in the central region The substrate arrangement portion 22 that is an annular semiconductor light-emitting element arrangement portion is formed around the protruding portion 21, and an annular concave portion is formed between the substrate arrangement portion 22 and the flange portion 23 of the peripheral portion. twenty four.

An opening portion 25 into which the adapter guide 17 is fitted is formed in the center of the protruding portion 21, a window hole 26 is formed in a side portion of the opening portion 25, and a plurality of circumferential portions are formed as a mounted portion in the peripheral portion. A long elongated hole-shaped claw insertion hole 27 and a mounting hole 28 for screwing and fixing.

In the substrate arrangement portion 22, an annular land portion 29 for mounting the casing 16 is formed to protrude on the upper surface side of the fixture body 11. A plurality of hemispherical convex portions 30 are protruded from the peripheral portion of the substrate arrangement portion 22, and a plurality of long hole-shaped claw insertion holes 27 that are long in the circumferential direction are formed.

A plurality of globe attachment fittings 31 are attached to the recesses 24, and the shade attachment fittings 31 are detachably attached to the shades 14 by rotating the shade 14 with respect to the fixture body 11. The globe attachment 31 does not protrude from the substrate arrangement portion 22 but is housed in the recess 24 .

Further, the substrate 12 of the light-emitting module is formed in a semi-annular shape, and the pair of substrates 12 are combined in a ring shape by arranging the pair of substrates 12 on the substrate arrangement portion 22 of the luminaire main body 11. The substrate 12 is formed of a material such as metal, ceramics, or resin. A plurality of fitting holes 34 that are fitted to the convex portions 30 are formed in the peripheral portion of the substrate 12 .

A wiring pattern is formed on the front surface of the substrate 12, for example, a plurality of semiconductors including an LED element or an organic electroluminescence (EL). The bulk light-emitting element is connected to the wiring pattern and has a plurality of rows mounted on concentric circles. In the embodiment, as the semiconductor light-emitting element, a surface mount type surface mount device (SMD) package type LED element 35 is used, and the plurality of LED elements 35 are circumferentially formed on the substrate 12. Arrange at equal intervals and have 2 rows arranged on concentric circles. The light-emitting portion of the LED element 35 faces in the opposite direction with respect to the substrate 12 and is in the downward direction in the installed state of the lighting fixture 10. Further, a reflective surface 36 having a high reflectance characteristic covering the wiring pattern is formed on the front surface of the substrate 12.

Further, the light-transmitting cover 13 is made of a transparent resin having light transmissivity and light guiding property, and is formed in a ring shape in which an opening 39 is opened in the center. The light-transmitting cover 13 is formed in an annular shape that can cover the substrate 12 between the device body 11 and has a flat outer cover portion 40.

In the cover portion 40, two rows of annular light distribution control bodies 41 are formed on the concentric circles with respect to the LED elements 35 arranged in two rows on the concentric circles, and the annular light distribution control body 41 is formed. The light distribution of the light emitted by the LED element 35 is controlled. As shown in FIG. 3, the light distribution control body 41 is formed in a mountain shape having a concave portion 42 in which the LED element 35 is housed, and an incident surface 41a that faces the concave portion 42 and receives light from the LED element 35 is formed, and is formed to be incident on the light. An exit surface 41b in which the light in the light control body 41 is emitted to the outer surface.

The light distribution control body 41 is formed in a cross-sectional shape that is axially symmetrical with respect to the opposite outer direction in the center side direction of the luminaire main body 11 around the reference axis 43 , and the reference axis 43 is located more than the center 35 a of the light-emitting portion of the LED element 35 . By appliance body 11 The outside direction. In other words, the center 35a of the light-emitting portion of the LED element 35 is located closer to the center side of the luminaire main body 11 than the reference axis 43 of the light distribution control body 41.

In at least one of the incident surface 41a and the exit surface 41b on the outer peripheral side of the reference axis 43 of the light distribution control body 41, for example, a light diffusing surface using a concave-convex pattern is formed. Further, the diffusion characteristic of the light diffusion surface is formed such that the degree of diffusion gradually increases from the center side direction of the luminaire main body 11 toward the outer side direction. In the multi-row light distribution control body 41 on the concentric circle, the light distribution control body 41 on the outer circumference side is formed such that the degree of diffusion of the light diffusion surface is larger than that of the light distribution control body 41 on the inner circumference side.

As shown in FIG. 2, a plurality of claw portions 44 that can be inserted into the respective claw insertion holes 27 of the luminaire main body 11 are integrally formed on the inner circumferential side and the outer circumferential side on the back side of the light-transmitting cover 13. The plurality of claw portions 44 are formed in a substantially L shape toward one of the circumferential directions of the light transmissive cover 13 , that is, the mounting rotation direction. Further, by inserting the claw portions 44 into the respective claw insertion holes 27 of the luminaire main body 11 and rotating the light-transmitting cover 13 in the mounting rotation direction, the front end of each of the claw portions 44 is seated on the shank main body 11. The back side is pulled toward the luminaire body 11 and the claws 44 are caught on the back side of the luminaire main body 11, so as to be fixed by sandwiching the substrate 12 between the luminaire main body 11 and the light-transmitting cover 13. The appliance body 11 and the light transmissive cover 13 are provided.

A screw insertion hole 46 is provided in one portion of the inner peripheral portion of the light-transmitting cover 13 . By passing the screw through the screw insertion hole 46 and screwing into the mounting hole 28 of the fixture body 11, the light-transmitting cover 13 is restricted from being rotated in the disassembly and rotation direction opposite to the mounting rotation direction.

In addition, the lampshade 14 is made of a light-transmissive milky white resin, the above table. The surface side opening is formed, and a mounting step portion attached to each of the globe attachment fittings 31 is formed on the inner peripheral edge portion on the upper surface side. The lower surface of the fixture body 11, the substrate 12, the light transmissive cover 13, and the like are covered by the lamp cover 14 attached to the fixture body 11.

As shown in Fig. 1(a), the central portion 14a of the globe 14 facing the center of the fixture body 11 is disposed at a position further away from the fixture body 11 than the position of the intersection P, which is from the circumference. The LED element 35 serves as a tangent extending from the peripheral portion of the protruding portion 21, that is, an imaginary line 48 intersecting at the center side of the fixture body 11.

Moreover, as shown in FIG. 2, the frame 15 is made of a translucent resin and is formed in a ring shape, and the inner peripheral side edge part is attached to the upper surface side peripheral part of the luminaire main body 11. A pair of sensor window holes 50 are formed at one portion of the lower surface of the casing 15.

Further, the case body 16 is made of metal, and a side wall portion 53 that protrudes toward the lower surface side is formed in the peripheral portion, and the side wall portion 53 is attached to the table portion 29 of the luminaire main body 11. A housing space 54 is formed in the casing 16, and the housing space 54 is mounted to house the adapter guide 17 and the lighting circuit 18 between the upper surface of the fixture body 11. A plurality of cushioning materials 55 are mounted on the upper surface of the casing 16, wherein the cushioning materials 55 are compressed between the ceiling and the ceiling when the lighting fixture 10 is placed on the ceiling surface, thereby preventing the lighting fixture The shaking of 10 or the rotation of the lighting fixture 10 is prevented.

Further, the adapter guide 17 is formed in a tubular shape and is detachably attached to the connector mounted to a ceiling socket provided on the ceiling surface. Combine. In the adapter guide 17, a long lamp 58 and a remote control number changeover switch portion 59 which face the lower surface side of the window hole 26 of the luminaire main body 11 are disposed. Further, the long light lamp 58 and the remote control number changeover switch unit 59 and the like may be disposed on the substrate of the lighting circuit 18.

Further, the lighting circuit 18 includes a circuit board 62 which is disposed around the adapter guide 17 and is fixed to the casing 16 side, and various electronic components constituting the lighting circuit 18 are mounted on the circuit board 62. The commercial AC power supply is input to the power input side of the lighting circuit 18 via the adapter and the ceiling socket, and the power output side of the lighting circuit 18 is connected to the plurality of LED elements 35 via the wiring pattern of the substrate 12. Further, the lighting circuit 18 rectifies and smoothes the AC power source, converts it into a predetermined DC power source, and supplies it to the LED element 35.

Further, the lighting circuit 18 detects the brightness of the illumination space in which the lighting fixture 10 is provided by the illuminance sensor 63, and has a function of automatically adjusting the output of the LED element 35.

The illuminance sensor 63 is housed in the sensor case 65. The sensor case 65 is mounted on the upper surface of the luminaire body 11 and the frame 15, and the illuminance sensor 63 and the sensor window of the frame 15 are provided. The holes 50 are arranged opposite each other.

Next, when assembling the lighting fixture 10, the casing 16 to which the adapter guide 17, the lighting circuit 18, and the like are attached is attached to the upper surface of the fixture body 11. Further, the frame 15 is mounted on the upper surface of the fixture body 11, the illuminance sensor 63 is electrically connected to the lighting circuit 18, and the sensor housing 65 for holding the illuminance sensor 63 is mounted on the appliance. The upper surface of the body 11 and the frame 15.

In a state in which the substrate arrangement portion 22 of the luminaire main body 11 is vertically reversed, the respective substrates 12 are placed on the substrate arranging portion 22, and the fitting holes 34 of the substrate 12 are concave-convex and fitted to the substrate arranging portion 22 Each convex portion 30. Thereby, the position of the substrate 12 in the direction (horizontal direction) of the surface of the substrate arrangement portion 22 of the luminaire main body 11 is positioned and held. Further, wiring between the two substrates 12 or between the substrate 12 and the lighting circuit 18 is performed.

The light-transmitting cover 13 is covered with the cover substrate 12, and the claw portions 44 of the light-transmitting cover 13 are inserted into the respective claw insertion holes 27 of the device body 11, and the light-transmitting cover 13 is rotated toward the mounting. The direction is rotated, whereby the front end of each of the claw portions 44 rides on the back side of the upper body 11 and the light-transmitting cover 13 is pulled toward the instrument body 11. At this time, the light-transmitting cover 13 abuts against the substrate 12, and the substrate 12 is pressed against the device body 11. Further, when each of the claw portions 44 is caught on the back side of the luminaire main body 11, the luminaire main body 11 and the light transmissive outer cover 13 are fixed in a state in which the substrate 12 is sandwiched between the luminaire main body 11 and the light transmissive outer cover 13.

The screw is inserted through the screw insertion hole 46 of the light-transmitting cover 13 and screwed into the mounting hole 28 of the fixture body 11 to be fixed, thereby restricting the light-transmitting cover 13 from being rotated in the disassembly and rotation direction opposite to the mounting rotation direction. .

The lamp cover 14 is placed on the luminaire main body 11 so as to cover the substrate 12, the light-transmitting cover 13, and the like, and the lamp cover 14 is rotated in a predetermined mounting rotation direction, whereby the lamp cover 14 is attached to the lamp cover mounting metal fitting 31.

Further, the order of assembly of the lighting fixture 10 is not limited to the order described.

Then, when the lighting fixture 10 is set, the lampshade 14 will be removed in advance. The adapter guide 17 of the lighting fixture 10 is mounted on an adapter that is mounted on a ceiling socket on the ceiling. The wiring led out from the adapter is connected to the lighting circuit 18 side to electrically connect the ceiling socket to the lighting circuit 18. The lamp cover 14 is mounted on the fixture body 11.

Then, by supplying the commercial alternating current power to the lighting circuit 18, the lighting power is supplied to the plurality of LED elements 35 from the lighting circuit 18, thereby lighting the plurality of LED elements 35.

The light generated by the plurality of LED elements 35 is controlled by the light distribution control body 41 of the light-transmitting cover 13 to be incident on the cover 14 and transmitted through the cover 14 to the illumination space.

Further, the luminance of the illumination space in which the lighting fixture 10 is provided is detected by the illuminance sensor 63, and the lighting circuit 18 automatically adjusts the output of the LED element 35.

Further, the heat generated by the LED element 35 is thermally conducted from the substrate 12 to the fixture body 11 and efficiently dissipated heat from the fixture body 11. On the other hand, the heat generated by the lighting circuit 18 is transmitted to the casing 16 to efficiently dissipate heat from the casing 16. Therefore, the heat generated by the LED elements 35 and the heat generated by the lighting circuit 18 are less likely to interfere with each other, and the heat generated by each of them can be efficiently dissipated.

In the lighting fixture 10 configured as described above, as shown in Fig. 1(a), the central portion 14a of the globe 14 facing the center of the fixture body 11 is disposed further away from the fixture body 11 side than the position of the intersection P. In the position, the intersection P is a tangent extending from the LED elements 35 on the circumference to the peripheral portion of the protruding portion 21, that is, the imaginary line 48 intersecting at the center side of the fixture body 11.

Assuming that the central portion 14a of the globe 14 is located closer to the fixture body 11 than the position of the intersection P, the shadow generated by the light from the LED element 35 being blocked by the projection 21 is mapped to the central portion 14a of the globe 14. The central portion 14a of the globe 14 is darkened.

By arranging the central portion 14a of the globe 14 at a position away from the apparatus body 11 side from the position of the intersection point P, it is possible to prevent the shadow from being mapped on the globe 14, so that the brightness of the entire globe 14 can be made uniform.

Further, in Fig. 1(a), the lighting fixture 10 having a wide distance between the ceiling surface and the LED element 35 and having a small projection amount from the lower surface of the fixture body 11 is shown in Fig. 1 (Fig. 1 (a). The lighting fixture 10 in which the distance between the ceiling surface and the LED element 35 is narrow and the protruding portion 21 protrudes from the lower surface of the fixture body 11 is shown in b). In the case of the lighting fixture 10 shown in FIG. 1(b), by arranging the central portion 14a of the globe 14 at a position away from the apparatus body 11 side from the position of the intersection P, it is possible to prevent the shadow from being mapped on the globe 14. Therefore, the brightness of the entire cover 14 can be made uniform.

In addition, when the LED elements 35 are arranged in a plurality of rows on the concentric circles, the intersection point P of the imaginary line 48 that is brought into contact with the peripheral portion of the protruding portion 21 from the innermost circumferential LED element 35 is used as a reference. The shadow can be prevented from being mapped on the lamp cover 14, so that the brightness of the lamp cover 14 can be uniform.

Further, the light distribution control body 41 is formed in a cross-sectional shape that is axially symmetrical with respect to the outer side direction of the luminaire main body 11 in the center direction of the luminaire main body 11 and the reference shaft 43 is located at the center of the light-emitting portion of the LED element 35. 35a depends on the appliance The outer direction of the body 11. The light distribution diagram using the light distribution control body 41 is shown in Fig. 4 . In FIG. 4, 0° is the direct downward direction, the plus angle side is the center side direction of the luminaire main body 11, and the minus angle side is the outer side direction of the luminaire main body 11.

As can be seen from FIG. 4, the illuminance in the center side direction of the luminaire main body 11 becomes larger than the illuminance in the outer direction. This is because the light-emitting portion of the LED element 35 is close to the inner peripheral side of the light distribution control body 41, so that the light emitted from the inner peripheral side of the light distribution control body 41 becomes more light emitted from the outer peripheral side. Since the mounting structure for mounting to the ceiling socket or the protruding portion 21 for accommodating the lighting circuit 18 is provided in the center of the fixture body 11, the central portion 14a of the globe 14 is provided from the LED element 35 disposed around the protruding portion 21. The distance between them is opened, but by having such a light distribution characteristic, the central portion 14a of the globe 14 is brightened, so that the brightness of the entire cover 14 can be made uniform.

Further, the peak of the light distribution of the light distribution control body 41 toward the center side of the luminaire main body 11 coincides with the intersection point P. Therefore, the central portion 14a of the globe 14 can be made bright, so that the brightness of the entire cover 14 can be made uniform.

In addition, since the light diffusing surface is formed in at least one of the incident surface 41a and the emitting surface 41b on the outer peripheral side of the light distribution control body 41, the unevenness of brightness in the peripheral portion of the globe 14 can be reduced. Thereby, the brightness of the entire cover 14 can be made uniform.

Further, the diffusion characteristic of the light diffusion surface is formed such that the degree of diffusion gradually increases from the center side direction of the luminaire main body 11 toward the outer direction. Further, in the multi-row light distribution control body 41 on the concentric circle, the light distribution control body 41 on the outer circumference side and the inside The light distribution control body 41 on the circumferential side is formed to have a larger degree of diffusion of the light diffusion surface. Thereby, the presence or absence of the boundary of the diffusion characteristics is not conspicuous, and the brightness of the entire globe 14 can be made uniform.

Further, the lighting fixture is not limited to a circular ceiling lamp, and may be applied to a quadrilateral or polygonal lighting fixture.

The embodiments of the present invention have been described by way of example only, and are not intended to limit the scope of the invention. The present invention may be embodied in various other forms, and various omissions, substitutions and changes may be made without departing from the scope of the invention. The invention and its modifications are intended to be included within the scope of the invention and the scope of the invention.

10‧‧‧Lighting appliances

11‧‧‧ Appliance body

12‧‧‧Substrate

13‧‧‧Lighting cover

14‧‧‧shade

14a‧‧‧Central Part

16‧‧‧Box

17‧‧‧Adapter guides

18‧‧‧Lighting circuit

21‧‧‧Protruding

22‧‧‧Substrate Configuration Department

23‧‧‧Flange

24‧‧‧ recess

29‧‧‧Department

35‧‧‧LED components as semiconductor light-emitting elements

41‧‧‧Light control body

48‧‧‧ imaginary line

54‧‧‧ accommodating space

P‧‧‧ intersection

Claims (3)

A lighting fixture characterized by comprising: an appliance body having a protruding portion protruding from a center of one surface; a semiconductor light emitting element disposed on a side of the fixture body in a circumferential direction around the protruding portion; and a lamp cover covering One side of the apparatus body and a central portion opposed to the center of the apparatus body are disposed at a position away from the apparatus body side from a position of the intersection point, the intersection point being the semiconductor light emission from the circumference An element intersects an imaginary line that is in contact with a peripheral portion of the protruding portion at an intersection of a center side of the fixture body, wherein a circuit board of the lighting circuit housed in the protruding portion is disposed to be mounted with a light emitting mode The substrate of the semiconductor light emitting element of the group is further above, and the semiconductor light emitting element of the light emitting module is covered with a light transmissive cover having light diffusibility. The lighting fixture according to claim 1, wherein the semiconductor light emitting element has a concentric shape around the protruding portion and a plurality of rows are disposed on one surface of the fixture body; and the imaginary line An imaginary line that is in contact with a peripheral portion of the protruding portion from the semiconductor light-emitting element that is the innermost circumference. The lighting fixture according to claim 1 or 2, wherein the light-emitting portion includes a light distribution control body that faces the semiconductor light-emitting element and controls light distribution; The light distribution control body is formed to be axially symmetrical with respect to the center side direction of the luminaire main body and the opposite outer side direction around the reference axis, and the reference axis is located outside the center of the semiconductor light emitting element.