JP6916148B2 - Lighting device - Google Patents

Description

An embodiment of the present invention relates to a lighting device that uses a light emitting element such as an LED as a light source.

Recently, with the increase in output, efficiency and widespread use of LEDs, lighting devices using LEDs as a light source, which are used indoors or outdoors and can be expected to have a long life, have been developed. In such a lighting device, a plurality of LEDs are mounted on a substrate so as to obtain a predetermined amount of light. For example, the substrate is fixedly arranged in the main body of the lighting device.

In this case, a metal mounting screw is generally used as the fixing means for fixing the substrate in order to maintain a reliable fixing state for a long period of time.

Japanese Patent No. 3972056 Japanese Unexamined Patent Publication No. 2010-282762

However, in the above-mentioned lighting device, for example, the insulation performance is insufficient against a high voltage such as a lightning surge, and when a high voltage is applied to the mounting screw, an overvoltage is applied to the LED via the mounting screw and the LED is used. Had the problem of being destroyed.

The present invention has been made in view of the above problems, and includes a metal device body having a mounting portion at the rear end for fixing the rear end to a support or the like; and a metal mounting plate attached to the device body. And; a substrate which is arranged in the main body of the apparatus, is formed in a rectangular shape, and has mounting holes at both ends in the longitudinal direction; With a wiring pattern having thermal diffusivity formed in; a metal fixing means inserted into a mounting hole of the board and attaching the board to the mounting plate; connected to the wiring pattern in the longitudinal direction of the board. It is an object of the present invention to provide a lighting device including a plurality of light emitting elements mounted along the same; a connection connector provided on one end side of the substrate located on the rear end side of the device body and connected to the power supply side; do.

The lighting device according to the embodiment of the present invention has a mounting portion for fixing the rear end side to a support column, and has a device main body formed in a substantially ship shape with an opening at the bottom; arranged on the opening side of the device main body. In addition, it has a pair of inclined surfaces on both sides of the support column in the traveling direction of the road, does not block the opening on the rear end side of the device main body on the mounting portion side, and does not block the rear end of the device main body. a mounting plate interior space side is attached to the opening side of the body to be opened; disposed pair of inclined surfaces of the mounting plate, and a substrate on which a plurality of light emitting elements for emitting light are mounted; the A lighting device arranged in a space between the mounting plate and the device main body to control lighting of the light emitting element; the mounting plate is mounted so as to cover the opening of the device main body, and the opening of the device main body is blocked by the mounting plate. The central region on the rear end side of the device body, which is not provided, is provided with a glove that has been textured to make it difficult to see the inside of the device body when the device body is looked up from below. It is characterized by.

According to the embodiment of the present invention, a light emitting device capable of improving the heat dissipation of the light emitting element and capable of equalizing the radiation of light from a plurality of light emitting elements and a lighting device provided with the light emitting device. Can be provided.

It is a perspective view which shows the lighting apparatus which concerns on 1st Embodiment of this invention. It is a perspective view which shows the part of the lighting apparatus in an exploded manner. It is a top view which shows the light emitting device. It is a top view which shows the glove. It is a perspective view which shows the glove. It is a side view which shows the state which the lighting device is attached to a utility pole. It is a top view which shows the light emitting device which concerns on 2nd Embodiment of this invention.

Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 6. In this embodiment, a security light is shown as a lighting device. Security lights are used by being installed on utility poles erected on roads, poles in parks, and the outer walls of factories, and are mainly used to ensure the safety of pedestrians.

FIG. 1 is a perspective view showing a security light, FIG. 2 is a partially disassembled perspective view showing the glove removed, and FIG. 3 is a plan view showing a light emitting device. 4 and 5 are a plan view and a perspective view showing the glove viewed from below, and FIG. 6 is a side view showing a state in which the security light is attached to a utility pole. In each figure, the same parts are designated by the same reference numerals, and duplicated description will be omitted.

The security light includes a device main body 1, a glove 2, and a light emitting device 3. The device main body 1 is made of, for example, a synthetic resin such as ASA resin or aluminum die-cast, and is formed in a substantially ship shape with an opening at the bottom, and is provided with a light emitting device 3, a lighting device 4, and an automatic flasher, which will be described later. There is.

In FIG. 2, a metal mounting plate 11 having inclined surfaces on both sides is attached to the opening side of the apparatus main body 1, and the light emitting device 3 is attached to the inclined surface of the mounting plate 11 as shown by an arrow. It has become like. The mounting plate 11 may be configured as a reflector.

The lighting device 4 is arranged on the back side of the mounting plate 11, and is configured by accommodating a circuit board and circuit components mounted on the circuit board in a box-shaped case, and powers the commercial AC power supply AC. It is connected by a line and receives an AC power supply AC to generate a DC output.

The lighting device 4 is configured, for example, by connecting a smoothing capacitor between the output terminals of a full-wave rectifier circuit and connecting a DC voltage conversion circuit and a current detecting means to the smoothing capacitor. Therefore, the lighting device 4 is connected to the light emitting device 3 by a wiring connecting member such as a lead wire, supplies the DC output thereof, and controls the lighting of the light emitting device 3.

The glove 2 is formed in a substantially hull shape with an upper opening attached so as to cover the lower opening of the device main body 1. The front end side of the glove 2 is connected to the device main body 1 by a hinge 21 so as to be openable and closable, and the rear end side is screwed.

As shown in FIGS. 4 and 5, the glove 2 is made of a translucent material such as acrylic resin, and prisms 22 composed of a plurality of ridges are integrated on both side surfaces of the inner surface in the longitudinal direction. Is formed in. The prism 22 is formed so that the ridge lines are continuous in the longitudinal direction, and has a function of refracting the light emitted from the light emitting device 3 and distributing the light mainly to the side (direction orthogonal to the longitudinal direction). ing.

On the other hand, the prism 22 is not formed in the central portion 23 (directly downward direction) in the longitudinal direction of the glove 2. The central portion 23 is appropriately textured or the like.

Therefore, the light emitted from the light emitting device 3 is refracted laterally by the prism 22 and irradiated, and is effectively irradiated in the direction directly below (indicated by the arrow in FIG. 5). Further, when the security light is viewed from below, the internal parts such as the light emitting device 3 are difficult to see due to the embossing or the like.

As shown in FIG. 3, the light emitting device 3 includes a substrate 31, a plurality of light emitting elements 32 mounted on the substrate 31, and a plurality of fixing means 33 provided on the outer peripheral edge of the substrate 31. Further, on the front surface side of the substrate 31, a lens member formed of a transparent material such as acrylic resin, in which a lens portion is formed so as to face each light emitting element 32 and is not shown, is arranged. ..

The substrate 31 is formed in a substantially rectangular shape, is made of a flat plate of a glass epoxy substrate (FR-4) or a glass composite substrate (CEM-3) which is an insulating material, and is a wiring formed of copper foil on the surface side. The pattern 34 is formed. When the material of the substrate 31 is an insulating material, a ceramic material or another synthetic resin material can be applied. Further, when it is made of metal, a metal base substrate in which an insulating layer is laminated on one surface of a base plate having good thermal conductivity and excellent heat dissipation such as aluminum can be applied.

The wiring pattern 34 is formed on the surface of the substrate 31 in a substantially rectangular shape inward at a predetermined distance from the peripheral edge of the substrate 31 over the entire surface. Further, the wiring pattern 34 is formed in a block shape corresponding to each light emitting element 32, and insulation is ensured between the blocks by an elongated insulating space S. Specifically, nine blocks are formed, and a plurality of light emitting elements 32 are connected so as to straddle each of the blocks. The wiring pattern 34 has thermal conductivity and also has thermal diffusivity to diffuse heat generated from the light emitting element 32.

The light emitting element 32 is an LED, which is a surface mount type LED package. Generally, it is composed of an LED chip arranged on a main body made of ceramics or a heat-resistant synthetic resin, and a translucent resin for molding such as an epoxy resin or a silicone resin that seals the LED chip. Has been done.

The LED chip is a blue LED chip that emits blue light. A phosphor is mixed in the translucent resin, and in order to be able to emit white light, a yellow phosphor that emits yellowish light, which has a complementary color relationship with blue light, is used. There is.

The LED may be a cannonball-shaped LED, and the mounting method and format are not particularly limited.

The plurality of fixing means 33 provided on the outer peripheral edge of the substrate 31 are metal mounting screws. The board 31 is mounted and fixed to the inclined surface of the mounting plate 11 by the mounting screws. That is, a mounting hole is formed in the substrate 31, and the mounting screw is screwed into the mounting plate 11 side through the mounting hole. Here, the outer peripheral edge portion of the substrate 31 means a range having a predetermined width from the outer peripheral edge of the substrate 31.

Further, an insulating region 36a to 36f is formed and secured in a predetermined range from the mounting screw, specifically, a range of 15 mm or more around the mounting screw. The insulating regions 36a to 36f are formed in an arc shape and are formed so as to penetrate the wiring pattern 34. Therefore, the insulating regions 36a to 36f, that is, the insulating distance can be surely secured by effectively utilizing the space on the surface of the substrate 31, and the size of the substrate 31 can be reduced.

Further, a plurality of light emitting elements 32, specifically, eight light emitting elements 32 are arranged so as to be arranged in two substantially cross shapes. Here, the light emitting element 32 located on the outer peripheral side of the substrate 31 is arranged between the adjacent insulating regions 36a to 36f that have penetrated the wiring pattern 34. For example, the specific light emitting element 32a located on the outer peripheral side of the substrate 31 is arranged between the insulating regions 36a and 36b, and the light emitting element 32b is arranged between the insulating regions 36b and 36c. There is.

Therefore, it is possible to realize miniaturization while securing the insulating regions 36a to 36f, and the light emitting element 32 can be evenly distributed on the surface of the substrate 31.

The fact that the light emitting element 32 is arranged between the adjacent insulating regions 36a to 36f includes a case where the outer shape of the light emitting element 32 is completely located between the insulating regions 36a to 36f or a case where a part of the light emitting element 32 is located between the insulating regions 36a to 36f. Is done.

Next, the electrical connection relationship of the light emitting device 3 will be described with reference to FIG. A connector 35 connected to the power supply side is provided on the end side of the board 31. Then, the positive electrode side terminal of the connection connector 35 is connected to the first block of the wiring pattern 34, and is sequentially connected from this block to the anode side terminal, the cathode side terminal, and the next block of the light emitting element 32. Finally, it is connected to the negative electrode side terminal of the connection connector 35. As a result, the light emitting elements 32 are connected in series, and when the power is supplied, the light emitting elements 32 are turned on all at once and function as a planar light emitting source.

It is preferable to form a white resist layer on the entire surface of the substrate 31. This resist layer acts as a reflective layer, and among the light emitted from the light emitting element 32, the light directed to the surface of the substrate 31 can be reflected to the front side, and the light emitted from the light emitting element 32 can be effectively used. It can be used.

As shown in FIG. 6, for example, the security light configured as described above is fixed by winding the rear wall portion of the device main body 1 around a utility pole 6 erected on the road via a mounting band 5 and fixed from the ground. It can be installed at a height of about 5 m.

In the security light installed in this way, when the outdoors become dark, the switch of the automatic flasher is automatically turned on, power is supplied to the light emitting device 3 from the power supply side via the lighting device 4, and the light emitting element 32 is turned on. .. Further, when the outdoors become bright, the switch of the automatic flasher is automatically turned off, and the light emitting element 32 is turned off.

In the lighting state of the security light, the light emitted from the light emitting element 32 passes through a lens member (not shown), passes through the translucent glove 2, and is radiated to the outside. More specifically, the light emitted from the light emitting element 32 is refracted sideways by prisms 22 formed on both side surfaces in the longitudinal direction of the globe 2 and is sent in the traveling direction of the road to illuminate the traveling direction of the road. do.

Further, from the central portion 23 in the longitudinal direction of the glove 2, the glove 2 is blown in the direct downward direction and irradiates in the direct downward direction. Therefore, the traveling direction and the direction directly below the road are effectively irradiated.

On the other hand, while the light emitting element 32 is lit, heat is generated from the light emitting element 32. This heat is conducted to the wiring pattern 34 which has thermal conductivity and thermal diffusivity, is transmitted to the substrate 31, is conducted from the back surface side of the substrate 31 to the mounting plate 11, and is dissipated. In this case, since the wiring pattern 34 has an area of a predetermined area, it functions as a heat spreader and promotes the heat dissipation action of the heat generated from the light emitting element 32.

Further, for example, even if a high voltage such as a lightning surge is applied to the fixing means 33, the insulating regions 36a to 36f are secured, so that the overvoltage is applied to the light emitting element 32 and the light emitting element 32 is destroyed. It becomes possible to avoid it. In this case, since the insulating regions 36a to 36 are formed so as to penetrate the wiring pattern 34, the limited space of the substrate 31 can be effectively used to reduce the size.

Further, among the plurality of light emitting elements 32, for example, some of the light emitting elements 32a are arranged between the insulating regions 36a and 36b, so that the light emitting elements 32 can be evenly distributed on the surface of the substrate 31. It is possible to equalize the radiation of light from the plurality of light emitting elements 32.

As described above, according to the present embodiment, it is possible to prevent the light emitting element 32 from being destroyed by the overvoltage, and it is possible to effectively utilize the space of the substrate 31 to reduce the size of the light emitting element. The heat dissipation of 32 can be improved. Further, it is possible to provide a light emitting device 3 and a lighting device capable of equalizing the radiation of light from a plurality of light emitting elements 32.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a plan view showing the light emitting device 3. The same or corresponding parts as those in the first embodiment are designated by the same reference numerals, and duplicated description will be omitted.

The light emitting device 3 includes a substrate 31, four light emitting elements 32 mounted on the substrate 31 in a substantially cross shape, and a plurality of fixing means 33 provided on the outer peripheral edge of the substrate 31.

The substrate 31 is formed in a substantially square shape, and the wiring pattern 34 is formed on the surface of the substrate 31 over substantially the entire surface. Further, the wiring pattern 34 is formed in a block shape corresponding to each light emitting element 32.

Fixing means 33 is provided on the outer peripheral edge portion of the substrate 31, specifically, each corner portion. Further, insulating regions 36a to 36d are formed from the fixing means 33 over a predetermined range. The insulating regions 36a to 36d are formed in an arc shape in a 1/4 circular shape, and are formed by biting into the wiring pattern 34. Therefore, the space on the surface of the substrate 31 can be effectively used to secure the insulating regions 36a to 36d, and the substrate 31 can be miniaturized.

Further, all of the plurality of light emitting elements 32 are arranged between the adjacent insulating regions 36a to 36d that have penetrated the wiring pattern 34.

As described above, according to the present embodiment, it is possible to prevent the light emitting element 32 from being destroyed by the overvoltage.

At the same time, the space of the substrate 31 can be effectively used to reduce the size. In addition, the heat dissipation of the light emitting element 32 can be improved, and the radiation of light from the plurality of light emitting elements 32 can be equalized.

The present invention is not limited to the configuration of the above embodiment, and various modifications can be made without departing from the gist of the invention. For example, the number of light emitting elements mounted is not particularly limited as long as it is a plurality.

Further, the lighting device is not limited to the one used outdoors, and may be used indoors. It can be applied to various lighting devices used outdoors or indoors.

1 ... device body, 2 ... glove, 3 ... light emitting device, 4 ... lighting device, 11 ... mounting plate, 31 ... board, 32 ... light emitting element (LED), 33 ... Fixing means (mounting screw), 34 ... Wiring pattern, 36a to 36f ... Insulation area

Claims (1)

With a device body that has a mounting part for fixing the rear end side to the support and is formed in a substantially ship shape with an opening at the bottom;
It is arranged on the opening side of the device main body, has a pair of inclined surfaces on both sides in the traveling direction of the road with respect to the support column, and has an opening on the rear end side which is the mounting portion side of the device main body. With a mounting plate attached to the opening side of the main body so that the internal space on the rear end side of the main body of the device is opened without blocking the device;
Disposed on a pair of inclined surfaces of the mounting plate, and a substrate on which a plurality of light emitting elements for emitting light are mounted;
A lighting device that is arranged in the space between the mounting plate and the main body of the device and controls lighting of the light emitting element;
When the instrument body is looked up from below, the central region on the rear end side of the device body, which is attached so as to cover the opening of the device body and the opening of the device body is not blocked by the mounting plate, is described. With gloves that have been textured to make it difficult to see the inside of the instrument body;
A lighting device characterized by comprising.

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