JP7239063B2 - lighting equipment - Google Patents

Description

The present disclosure relates to lighting devices.

Patent Literature 1 discloses an example of a lighting device. The lighting device includes an LED substrate (LED: Light Emitting Diode), a cylinder, and an end cap. A plurality of LED elements are mounted on the LED substrate. The LED substrate is arranged inside the cylinder. An end cap secures one end of the LED substrate to the end of the cylinder.

Japanese Patent Application Laid-Open No. 2007-207721

In the lighting device of Patent Document 1, the LED substrate is fixed to the end cap with screws. A space is provided between the rear surface of the LED substrate and the inner surface of the cylinder so that the tip of the screw that fixes the LED substrate does not interfere with the cylinder. Therefore, the thickness of the lighting device in the direction perpendicular to the LED substrate is increased.

The present disclosure relates to solving such problems. The present disclosure provides a lighting device that can be made thinner in the direction perpendicular to the LED substrate.

A lighting device according to the present disclosure includes an LED board on which a plurality of LED elements are mounted on the front surface, a rail on which the LED board is attached, a first piece attached to the rail, and a longitudinal end face of the LED board facing an end cap having a second piece that connects and a set screw that passes through the LED board, the rail, and the first piece and tightens them together.

With the lighting device according to the present disclosure, the thickness in the direction perpendicular to the LED substrate can be made thinner.

2 is a cross-sectional view along the longitudinal direction of the lighting device according to Embodiment 1. FIG. 2 is a cross-sectional view perpendicular to the longitudinal direction of the lighting device according to Embodiment 1. FIG. 2 is a cross-sectional view along the longitudinal direction of the lighting device according to Embodiment 1. FIG. 3 is a diagram showing an input system of the lighting device according to Embodiment 1; FIG.

DETAILED DESCRIPTION OF THE INVENTION Embodiments for implementing the present disclosure will be described with reference to the accompanying drawings. In each figure, the same or corresponding parts are denoted by the same reference numerals, and overlapping descriptions are appropriately simplified or omitted.

Embodiment 1.
FIG. 1 is a longitudinal sectional view of a lighting device 1 according to Embodiment 1. FIG.

The lighting device 1 is an LED lighting device. In this example, the lighting device 1 is a line lighting device that is long in one direction. In FIG. 1, a cross-sectional view along the longitudinal direction including the centerline of the lighting device 1 is shown. In this example, the longitudinal direction of the illumination device 1 is oriented in the horizontal direction. The lighting device 1 includes an LED board 2 , rails 3 , two end caps 4 , two fixing screws 5 , two fixing nuts 6 and an illumination plate 7 .

The LED board 2 is a plate-like member elongated in the longitudinal direction of the lighting device 1 . A plurality of LED elements 8 are mounted on the front surface of the LED substrate 2 . Each LED element 8 is a light-emitting element that emits visible light. In this example, the plurality of LED elements 8 are arranged along the longitudinal direction of the lighting device 1 . The LED substrate 2 has through holes 9 at both ends in the longitudinal direction. In this example, one through hole 9 is provided at the left end of the LED board 2 . The other through hole 9 is provided at the right end of the LED substrate 2 . One of the plurality of LED elements 8 is arranged on the distal end side of the through hole 9 in the longitudinal direction. In this example, one of the plurality of LED elements 8 is arranged to the left of the left through hole 9 . Another one of the plurality of LED elements 8 is arranged on the right side of the through hole 9 on the right side. A pair of adjacent LED elements 8 among the plurality of LED elements 8 mounted on the LED substrate 2 are arranged at an interval A. As shown in FIG. In this example, the spacing of the LED elements 8 is, for example, the center-to-center spacing of the LED elements 8 .

The rail 3 is a member to which the LED board 2 is attached. The rail 3 is a member elongated in the longitudinal direction of the lighting device 1 . In this example, the cross section of the rail 3 is U-shaped with a bottom portion 10 and two side portions 11 facing each other. The width of the bottom portion 10 is wider than the width of the LED substrate 2 . The rail 3 has through holes 12 at both ends in the longitudinal direction of the bottom portion 10 . In this example, one through hole 12 is provided at the left end of the rail 3 . The other through hole 12 is provided at the right end of the rail 3 . The through hole 12 at the left end of the rail 3 is arranged at a position overlapping the through hole 9 at the left end of the LED board 2 . The through hole 12 at the right end of the rail 3 is arranged at a position overlapping the through hole 9 at the right end of the LED board 2 .

Two end caps 4 are arranged at the longitudinal ends of the lighting device 1 . In this example, one end cap 4 is arranged at the left end of the lighting device 1 . The other end cap 4 is arranged at the right end of the illumination device 1 . Each end cap 4 has a first piece 13 and a second piece 14 . The first piece 13 and the second piece 14 are plate-like portions orthogonal to each other. The first piece 13 faces the rear surface of the rail 3 . The first piece 13 has a through hole 15 . The second piece 14 faces the longitudinal end surface of the LED substrate 2 . The second piece 14 is arranged longitudinally outward from the longitudinal end face. A second piece 14 of each end cap 4 prevents light leakage from the end of rail 3 . In this example, the second piece 14 does not wrap around the front surface of the LED substrate 2 . The through hole 15 in the first piece 13 of the end cap 4 arranged at the left end is arranged at a position overlapping the through hole 12 at the left end of the rail 3 . The through hole 15 in the first piece 13 of the end cap 4 arranged at the right end is arranged at a position overlapping the through hole 12 at the right end of the rail 3 . The second piece 14 of the end cap 4 arranged at the left end is arranged on the left side of the end surface of the left end of the LED board 2 . The second piece 14 of the end cap 4 arranged at the right end is arranged on the right side of the end surface of the right end of the LED board 2 .

Two fixing screws 5 are arranged at both longitudinal ends of the lighting device 1 . In this example, one fixing screw 5 is arranged at the left end of the lighting device 1 . The other fixing screw 5 is arranged at the right end of the lighting device 1 . A fixing screw 5 arranged at the left end passes through a through hole 9 at the left end of the LED board 2, a through hole 12 at the left end of the rail 3, and a through hole 15 in the left end cap 4 in this order. The fixing screw 5 arranged at the right end passes through the through hole 9 at the right end of the LED board 2, the through hole 12 at the right end of the rail 3, and the through hole 15 of the right end cap 4 in this order.

Two fixing nuts 6 are attached to one of the fixing screws 5 . In this example, one fixing nut 6 is attached to the left fixing screw 5 . The other fixing nut 6 is attached to the fixing screw 5 on the right side. The LED board 2 , the rail 3 , and the first piece 13 of the end cap 4 are fastened together by a fixing screw 5 and a fixing nut 6 .

The illumination plate 7 is a plate-like member that transmits visible light emitted by the LED elements 8 . The illumination plate 7 is, for example, a diffusion plate that diffuses visible light. The illumination plate 7 is arranged on the front side of the LED substrate 2 . The illumination plate 7 is arranged with a space B between it and the surfaces of the LED elements 8 . Spacing B is a spacing equal to spacing A. Here, the interval A and the interval B need only match within the range of manufacturing tolerances or assembly tolerances of the parts of the lighting device 1 . The illumination plate 7 is arranged between the second pieces 14 of the two end caps 4 . The illumination plate 7 is prevented from being removed from the illumination device 1 by the second piece 14 of each end cap 4 . In this example, the second piece 14 of each end cap 4 does not wrap around the front surface of the illumination plate 7 .

FIG. 2 is a cross-sectional view perpendicular to the longitudinal direction of the lighting device 1 according to Embodiment 1. FIG.

One or more heat-dissipating grooves 16 are symmetrically provided on the outer surface of each of the two side-surface portions 11 of the rail 3 . In this example, each heat dissipation groove 16 is a rectangular groove extending in the longitudinal direction of the lighting device 1 . Triangular grooves 17 are provided symmetrically to each other on the inner surface of each of the two side portions 11 of the rail 3 . Each triangular groove 17 extends in the longitudinal direction of lighting device 1 .

The illumination plate 7 has a triangular end portion perpendicular to the longitudinal direction. The lighting plate 7 is inserted into the rail 3 along the longitudinal direction so that it is held between the triangular grooves 17 in the two side portions 11 of the rail 3 .

FIG. 3 is a cross-sectional view along the longitudinal direction of the lighting device 1 according to Embodiment 1. FIG.
In FIG. 3, a cross-sectional view along the longitudinal direction including the center line of the lighting device 1 is shown. In FIG. 3 the lighting device 1 is shown before the two end caps 4, the two fixing nuts 6 and the lighting plate 7 are attached.

Each fixing screw 5 is passed through the through hole 9 of the LED board 2 and the through hole 12 of the rail 3 . At this time, the tip of the fixing screw 5 protrudes from the rear surface of the rail 3 . In the process of assembling the lighting device 1, the lighting plate 7 is inserted along the triangular groove 17 of the rail 3 in the state shown in FIG. 3, for example. After that, the fixing screw 5 projecting from the rear surface of the rail 3 is passed through the through hole 15 of the end cap 4 . After that, the lighting device 1 is assembled by tightening the fixing nut 6 .

FIG. 4 is a diagram showing an electric power input system of the lighting device 1 according to the first embodiment.

The lighting device 1 includes a first input section 18 and a second input section 19 . The first input section 18 and the second input section 19 may be provided on the LED board 2, for example. The first input section 18 is an input system that supplies power to each LED element 8 . The first input unit 18 is an input system during normal operation. The second input section 19 is an input system that supplies power to each LED element 8 . The second input unit 19 is an input system for emergencies and the like. A second input 19 includes a resistor 20 and a diode 21 in series with the LED element 8 . A resistor 20 is an element that limits the current flowing through the LED element 8 . The diode 21 is provided so that the forward direction is the direction in which the current flows through the LED element 8 . The diode 21 is an element that prevents reverse current flow to the second input section 19 during normal operation.

During normal operation, each LED element 8 emits light due to the current input from the first input section 18 . The light emitted by each LED element 8 illuminates the space on the front side of the lighting device 1 through the lighting plate 7 .

For example, in an emergency such as when an emergency event occurs, the input system to the LED element 8 is switched from the first input section 18 to the second input section 19 . At this time, the current input from the second input section 19 to the LED element 8 is limited by the resistor 20 to be smaller than the current input from the first input section 18 under normal conditions. Therefore, the lighting device 1 in an emergency uses the same LED elements 8 as in a normal state to emit light that is dimmed with reduced power consumption.

As described above, lighting device 1 according to Embodiment 1 includes LED board 2 , rail 3 , end cap 4 , and fixing screw 5 . A plurality of LED elements 8 are mounted on the front surface of the LED substrate 2 . On the rail 3 the LED board 2 is mounted. End cap 4 has a first piece 13 and a second piece 14 . A first piece 13 is attached to the rail 3 . The second piece 14 faces the longitudinal end surface of the LED substrate 2 . The fixing screw 5 penetrates the LED board 2, the rail 3, and the first piece 13 and tightens them together.

Since the screws for fixing the LED board 2 pass through the rail 3 and the first piece 13 of the end cap 4 , no space is required between the rear surface of the LED board 2 and the rail 3 . Therefore, the thickness of the illumination device 1 in the direction perpendicular to the LED substrate 2 can be reduced. Moreover, since it is not necessary to fit the end caps 4 from the ends in the longitudinal direction, the effective length of the LED substrate 2 is not shortened. Further, since the LED board 2 and the rail 3 are fastened together by the fixing screws 5, heat is easily transferred from the LED board 2 to the rail 3. FIG. Therefore, the heat generated from the LED substrate 2 is easily dissipated through the rail 3 . This allows the lighting device 1 to operate even in a high-temperature environment.

Also, one of the plurality of LED elements 8 is arranged on the front end side of the LED board 2 in the longitudinal direction from the fixing screw 5 .

As a result, even the edge of the lighting device 1 can be made to emit light uniformly.

Moreover, the rail 3 has heat radiation grooves 16 on its outer surface.

Since the surface area of the outer surface of the rail 3 is increased, the heat generated from the LED substrate 2 is more easily dissipated through the rail 3. - 特許庁This allows the lighting device 1 to operate even in a higher temperature environment.

Also, the second piece 14 is arranged outside the tip of the illumination plate 7 in the longitudinal direction of the LED board 2 . The illumination plate 7 is arranged on the front side of the LED substrate 2 .

Since the light emission from the LED substrate 2 is not blocked by the second piece 14, the lighting device 1 can emit light evenly to the edge.

A pair of LED elements 8 adjacent to each other among the plurality of LED elements 8 are arranged at an interval A equal to the interval B between the plurality of LED elements 8 and the illumination plate 7 .

As a result, a pair of adjacent LED elements 8 complement each other in projection angles for projecting visible light. Therefore, non-uniformity of light emission through the illumination plate 7 is suppressed.

The rail 3 also has a triangular groove 17 for holding the illumination plate 7 .

This facilitates the insertion of the illumination plate 7 into the rail 3 .

The illumination device 1 also includes a first input section 18 and a second input section 19 . A first input 18 supplies power to each LED element 8 . A second input 19 includes a resistor 20 . A second input 19 supplies power to each LED element 8 . The input voltage of the second input section 19 is approximately the same voltage as the input voltage of the first input section 18, for example. The current supplied by the second input 19 is limited by the resistor 20 to be less than the current supplied by the first input 18 .

As a result, the illumination device 1 in an emergency can use the same LED elements 8 as in normal times to emit light with reduced power consumption and reduced brightness. As a result, there is no need to separately prepare the LED elements 8 for normal and emergency situations, so an increase in the number of parts, an increase in material and assembly costs, and an increase in the space of the lighting device 1 can be suppressed. In addition, when the illumination device 1 is battery-driven, the battery driving time becomes longer.

The lighting device according to the present disclosure can be applied, for example, to lighting in places where thinness in the direction perpendicular to the LED substrate of the lighting device is required.

REFERENCE SIGNS LIST 1 illumination device 2 LED substrate 3 rail 4 end cap 5 fixing screw 6 fixing nut 7 illumination plate 8 LED element 9 through hole 10 bottom 11 side portion 12 through hole 13 first piece , 14 second piece, 15 through hole, 16 heat dissipation groove, 17 triangular groove, 18 first input section, 19 second input section, 20 resistor, 21 diode

Claims (7)

an LED substrate on which a plurality of LED elements are mounted on the front surface;
a rail to which the LED board is attached;
an end cap having a first piece attached to the rail and a second piece facing a longitudinal end face of the LED substrate;
a fixing screw that passes through the LED board, the rail, and the first piece and fastens them together;
A lighting device. 2. The lighting device according to claim 1, wherein one of the plurality of LED elements is arranged on the front end side of the LED board in the longitudinal direction from the fixing screw. The lighting device according to claim 1 or 2, wherein the rail has a heat dissipation groove on an outer surface. The lighting device according to any one of claims 1 to 3, wherein the second piece is arranged outside the tip of the LED board in the longitudinal direction of the lighting plate arranged on the front side of the LED board. A set of LED elements adjacent to each other among the plurality of LED elements is arranged at an interval equal to an interval between the plurality of LED elements and the illumination plate arranged on the front side of the LED substrate. 4. The lighting device according to any one of 3. The lighting device according to any one of claims 1 to 3, wherein the rail has a triangular groove that holds a lighting plate arranged on the front side of the LED board. a first input that supplies power to each of the plurality of LED elements;
a second input including a resistor for powering each of the plurality of LED elements to a limited current less than the current supplied by the resistor from the first input;
7. A lighting device according to any one of claims 1 to 6, comprising:

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