JP7042442B2 - Lighting equipment - Google Patents

Description

The present invention relates to a lighting device, and more particularly to a lighting device including a lens for controlling light distribution.

As a conventional example, the lighting device described in Patent Document 1 will be illustrated. The lighting device described in Patent Document 1 is a waterproof emergency light (emergency lighting device) installed on the ceiling of, for example, a clean room. The lighting device described in Patent Document 1 (hereinafter referred to as a conventional example) includes an instrument main body, an LED (Light Emitting Diode), a battery pack, a charging circuit, a lighting circuit, and a lens. The LED is arranged in the fixture body and irradiates light from the opening of the fixture body. The battery pack is placed on the instrument body. The charging circuit is arranged in the main body of the appliance and charges the battery pack with an external power source. The lighting circuit is arranged in the main body of the fixture, and the LED is lit by the power supply of the battery pack. The lens controls the light distribution of the light from the LED.

By the way, in the emergency light, the part exposed in the room needs to be made of non-combustible material. Therefore, even in the conventional example, it is desirable that the lens is made of a translucent incombustible material such as glass.

Japanese Unexamined Patent Publication No. 2016-12215

By the way, as a material for forming a lens, a synthetic resin (for example, acrylic resin) is widely used in addition to glass. However, a lens made of synthetic resin is generally superior in processability to a lens made of glass and has a high degree of freedom in design, but it is difficult to use it as a lens for an emergency light because the synthetic resin is a combustible material.

An object of the present invention is to provide a lighting device capable of improving the workability of a lens and the degree of freedom in design while maintaining safety.

The lighting device according to one aspect of the present invention includes one or more solid-state light sources, a support member that supports the solid-state light source, and one or more lenses arranged on an optical path of light radiated from the solid-state light source. To prepare for. The lighting device includes a lens cover that covers the lens and a holding member that holds the lens cover. The lens cover is formed of a translucent non-combustible material so as to project in a direction away from the solid light source. The support member supports the lens together with the solid light source. The heat-resistant temperature of the synthetic resin material forming the support member is higher than the heat-resistant temperature of the synthetic resin material forming the lens.

The lighting device of the present invention has an effect that the workability of the lens and the degree of freedom in design can be improved while maintaining the safety.

FIG. 1 is a perspective view of a lighting device according to an embodiment of the present invention. FIG. 2 is a front view of the same lighting device. FIG. 3 is a cross-sectional view of a main part of the same lighting device. FIG. 4 is a cross-sectional view of a main part of the same lighting device. FIG. 5 is a cross-sectional view of a main part of the lighting device of the first modification. FIG. 6 is a cross-sectional view of a main part of the lighting device of the second modification. FIG. 7 is a cross-sectional view of a main part of the lighting device of the third modification.

Hereinafter, the lighting device 1 according to the embodiment will be described in detail with reference to FIGS. 1 to 7. In the following description, unless otherwise specified, the front-back, left-right, and up-down directions indicated by the arrows in FIG. 1 are regarded as the front-back, left-right, and up-down directions of the lighting device 1. However, each figure described in the following embodiment is a schematic view, and the ratio of the size and the thickness of each component does not necessarily reflect the actual dimensional ratio. The configuration described in the following embodiments is only an example of the present invention. The present invention is not limited to the following embodiments, and various modifications can be made depending on the design and the like as long as the effects of the present invention can be achieved.

The lighting device 1 of the present embodiment is installed in a building such as a high-rise building or a large commercial facility, and receives power from an emergency power source installed in the building to perform emergency lighting, so-called separate power supply type emergency. Lighting equipment. That is, as shown in FIG. 1, the lighting device 1 is installed in the ceiling material A1 (ceiling) so as to partially embed the embedded hole A11 provided in the ceiling material A1 in the building. However, the lighting device may be a battery-built emergency lighting fixture having an emergency power supply including a storage battery.

As shown in FIGS. 1 to 3, the lighting device 1 includes an LED 2, an LED holder 3, a lens 4, a lens cover 5, and a holding member 6. The lighting device 1 further includes a case 7, a terminal block 10, a cover 80, and a pair of supports 81.

The LED 2 which is a solid-state light source is, for example, a COB (Chip on Board) type white LED for lighting. The LED 2 has a light emitting unit 20 and a mounting board 21 (see FIG. 3). The light emitting unit 20 has one or more blue LED chips (not shown) mounted on the mounting substrate 21 and a sealing unit for sealing one or more blue LED chips. The sealing portion has a translucent synthetic resin (for example, a silicone resin) and a fluorescent substance mixed in the synthetic resin. When a part of the blue light emitted from the blue LED chip passes through the sealing portion, the wavelength is converted into yellow light by the fluorescent substance. As a result, white light is obtained by the blue light and the yellow light emitted from the light emitting unit 20. However, the solid-state light source is not limited to the LED. The solid light source may be a solid light emitting device such as a semiconductor laser device or an organic electroluminescence device.

The LED holder 3 which is a support member is formed in a frame shape (see FIG. 3). The LED holder 3 supports the LED 2 so as to cover the peripheral portion of the mounting board 21. The LED holder 3 is preferably made of a synthetic resin having a high heat resistant temperature, such as polyethylene resin or polycarbonate resin. The heat resistant temperature of the polyethylene resin is 90 ° C to 110 ° C. The heat resistant temperature of the polycarbonate resin is 120 ° C to 130 ° C.

As shown in FIGS. 3 and 4, the lens 4 is arranged on an optical path of light emitted from the LED 2 (see the solid arrow in FIG. 4). Specifically, the lens 4 is supported by the LED holder 3 so as to cover the light emitting portion 20 of the LED 2.

The lens 4 is made of a translucent synthetic resin. As the synthetic resin material forming the lens 4, for example, an acrylic resin or a silicone resin is preferable. The lens 4 has a hemispherical incident surface 40 and an exit surface 41 formed in a hemispherical shape concentric with the incident surface 40. That is, the lens 4 is formed in a hemispherical shell shape having a uniform thickness. However, the shape of the lens 4 is not limited to the hemispherical shell shape. The lens 4 may have any shape as long as it can realize the light distribution characteristics required for the emergency lighting equipment. In particular, if the lens 4 is made of a synthetic resin material, the degree of freedom in designing the shape of the lens 4 is higher than in the case where the lens 4 is made of a glass material (for example, borosilicate glass).

As shown in FIG. 3, the lens cover 5 has a main body portion 50 and a flange portion 51. The main body 50 is formed in the shape of a hemispherical shell protruding in a direction away from the LED 2 (downward). The flange portion 51 is formed in an annular shape. The flange portion 51 projects outward from the peripheral edge of the main body portion 50. The main body portion 50 and the flange portion 51 are integrally formed of a translucent non-combustible material. As the non-combustible material forming the lens cover 5, for example, glass containing silicon dioxide as a main component (also referred to as inorganic glass) such as borosilicate glass is preferable.

The main body portion 50 has a hemispherical incident surface 500 and an exit surface 501 formed in a hemispherical shape concentric with the incident surface 500. That is, the main body 50 is formed in a hemispherical shell shape having a uniform thickness. Further, it is preferable that the curvature of the exit surface 501 of the main body 50 is equal to the curvature of the exit surface 41 of the lens 4. However, the shape of the main body 50 is not limited to the hemispherical shell shape. For example, the shape of the main body portion 50 may be a truncated cone shape or a cylindrical shape. Further, the thickness of the central portion of the main body portion 50 may be thinner than the thickness of the peripheral portion of the main body portion 50. When the thickness of the central portion of the main body portion 50 is thinner than the thickness of the peripheral portion of the main body portion 50, it is possible to suppress the attenuation of the light transmitted through the central portion of the main body portion 50. As a result, the lighting device 1 can increase the illuminance directly underneath.

The lens cover 5 is held by the main body 50 on the holding member 6 so as to cover the lens 4 (see FIG. 3).

The holding member 6 is formed in a flat plate shape by, for example, a metal material such as aluminum or an aluminum alloy (see FIG. 3). The LED 2 and the lens 4 are attached to the lower surface of the holding member 6 by the LED holder 3 and held by the holding member 6. The LED holder 3 is preferably fixed to the holding member 6 by an appropriate fixing method such as screwing. Further, the lens cover 5 is attached to the lower surface of the holding member 6. Specifically, the lens cover 5 is held by the holding member 6 by screwing the flange portion 51 to the lower surface of the holding member 6.

The case 7 is formed in the shape of a bottomed cylinder having an open lower surface and a long bottom in the vertical direction with the upper portion as the bottom (see FIG. 1). The case 7 is preferably formed of a metal plate such as a zinc steel plate or a stainless steel plate. A square window 70 is opened at the upper part of the front surface of the case 7. The case 7 houses an LED 2, an LED holder 3, a lens 4, a lens cover 5, a holding member 6, a lighting device (not shown) for lighting the LED 2, and a terminal block 10. The holding member 6 is screwed to the case 7 while being housed inside the case 7. Further, one support 81 is attached to each of the left side surface and the right side surface of the case 7 (see FIGS. 1 and 2).

The terminal block 10 is, for example, a screwless terminal block (also referred to as a quick-connect terminal block). The terminal block 10 has a rectangular parallelepiped housing. Two pairs of primary side (power supply side) insertion holes 100 and two pairs of secondary side (load side) insertion holes 101 (see FIG. 2) are provided on the front surface of the terminal block 10 housing. Has been done. Two pairs of insertion holes 100 of the terminal block 10 are exposed to the outside of the case 7 through the window 70 of the case 7 (see FIG. 2). That is, the terminal block 10 can complete the electrical connection with the conductor only by inserting a conductor (for example, a single copper wire) into the insertion holes 100 and 101, respectively. One conductor of each of the two electric wires (not shown) on the secondary side is inserted into the insertion hole 101 on the secondary side of the terminal block 10. In the two pairs of insertion holes 100 on the primary side of the terminal block 10, a conductor of a pair of electric wires (not shown) to which power is supplied from an emergency power supply and a pair of electric wires for feed wiring (not shown) One conductor and one conductor are inserted.

The cover 80 is made of a metal material such as aluminum and is formed in a disk shape having a circular window hole 800 in the center (see FIG. 1). The holding member 6 and the case 7 are attached to the upper surface of the cover 80. The holding member 6 is attached to the cover 80 by being screwed to the cover 80 with a plurality of screws. The main body 50 of the lens cover 5 is passed through the window hole 800 and protrudes below the lower surface of the cover 80 (see FIG. 2). The case 7 is held by the cover 80 via the holding member 6.

Here, in the lighting device 1 of the embodiment, the lens 4 is covered with the lens cover 5 made of a noncombustible material. Therefore, since the lens 4 is protected from fire flames and the like by the lens cover 5 made of a non-combustible material, it can be formed of a combustible synthetic resin material. If the lens 4 is made of a synthetic resin material, the performance of the lens 4 can be improved while reducing the manufacturing cost of the lens 4 as compared with the case where the lens 4 is made of a glass material. Therefore, the lighting device 1 of the embodiment can improve the workability of the lens 4 and the degree of freedom in design while maintaining the safety.

Next, some modifications of the lighting device 1 of the embodiment will be described. In the lighting device 1 of the first modification, as shown in FIG. 5, the main body 50 of the lens cover 5 is in contact with the exit surface 41 of the lens 4. Therefore, in the lighting device 1 of the first modification, the size of the lens cover 5 can be reduced while keeping the amount of light emitted from the lens cover 5 and the light distribution characteristics substantially equal to those of the lighting device 1 of the embodiment. can.

As shown in FIG. 6, the lighting device 1 of the second modification has a plurality of (three in the figure) LEDs 2, a plurality of lenses 4 (the same number as the LEDs 2), and a plurality of lenses covers 5 (the same number as the LEDs 2 and the lenses 4). It is equipped with. However, each LED 2, the lens 4, and the lens cover 5 have a common configuration except that they are smaller than the LED 2, the lens 4, and the lens cover 5 in the lighting device 1 of the embodiment. The plurality of lenses 4 are provided in a one-to-one correspondence with the plurality of LEDs 2. Further, the plurality of lens covers 5 are provided in a one-to-one correspondence with the plurality of lenses 4. By providing the lighting device 1 of the second modification with the plurality of LEDs 2 and the plurality of lenses 4, the light distribution characteristics can be finely adjusted as compared with the lighting device 1 of the embodiment.

As shown in FIG. 7, the lighting device 1 of the third modification covers the plurality of LEDs 2 and the plurality of lenses 4 together with one lens cover 5 (main body 50) in the lighting device 1 of the second modification. It is configured as follows. Compared with the lighting device 1 of the second modification, the lighting device 1 of the third modification can reduce the size of the lens cover 5 and the holding member 6 in the front-rear direction and the left-right direction.

By the way, it is preferable that the refractive index of the material forming the lens cover 5 is equal to the refractive index of the material forming the lens 4. For example, it is preferable that the material forming the lens 4 is acrylic resin and the material forming the lens cover 5 is borosilicate glass. Incidentally, the refractive index of the acrylic resin and the refractive index of the borosilicate glass are generally about 1.49.

If the refractive index of each material of the lens 4 and the lens cover 5 is equal as described above, the refractive index of the lens cover 5 is taken into consideration as compared with the case where the refractive index of each material of the lens 4 and the lens cover 5 is not equal. It becomes easy to adjust the light distribution characteristics of the lens 4.

By the way, the heat-resistant temperature of the synthetic resin material (polycarbonate resin or polyethylene resin) forming the LED holder 3 is higher than the heat-resistant temperature of the synthetic resin material (acrylic resin) forming the lens 4. For example, the heat-resistant temperature of the polycarbonate resin is 120 ° C. to 130 ° C., and the heat-resistant temperature of the acrylic resin is generally 70 ° C. to 90 ° C. As described above, if the heat-resistant temperature of the material forming the LED holder 3 is higher than the heat-resistant temperature of the material forming the lens 4, the LED holder 3 may be deformed when the temperature inside the case 7 rises abnormally. The possibility of occurrence can be reduced.

Further, in the lighting device 1 of the embodiment and each modification, the curvature of the emission surface 501 of the main body 50 of the lens cover 5 and the curvature of the emission surface 41 of the lens 4 are equal, and the thickness of the lens cover 5 is uniform. .. Therefore, in the lighting device 1 of the embodiment and each modification, the arrangement of the lens 4 in consideration of the lens cover 5 is compared with the case where the curvature of the emission surface 501 of the main body 50 and the curvature of the emission surface 41 of the lens 4 are not equal. It becomes easy to adjust the optical characteristics.

As described above, the lighting device (1) according to the first aspect includes one or more solid-state light sources (LED2), a support member (LED holder 3) that supports the solid-state light source, and light emitted from the solid-state light source. It comprises one or more lenses (4) arranged on the optical path. The lighting device (1) according to the first aspect includes a lens cover (5) that covers the lens (4) and a holding member (6) that holds the lens cover (5). The lens cover (5) is formed of a translucent non-combustible material so as to project in a direction away from the solid light source.

In the lighting device (1) according to the first aspect, since the lens (4) can be protected by the lens cover (5) made of a noncombustible material, the lens (4) can be formed of a combustible synthetic resin material. .. Therefore, the lighting device (1) according to the first aspect has the performance of the lens (4) while lowering the manufacturing cost of the lens (4) as compared with the case where the lens (4) is made of a nonflammable glass material. It can be improved. As a result, the lighting device (1) according to the first aspect can improve the workability and the degree of freedom in design of the lens (4) while maintaining the safety.

The lighting device (1) according to the second aspect can be realized in combination with the first aspect. In the lighting device (1) according to the second aspect, it is preferable that the refractive index of the material forming the lens cover (5) is equal to the refractive index of the material forming the lens (4).

The illuminating device (1) according to the second aspect is a lens in consideration of the refractive index of the lens cover (5) as compared with the case where the refractive indexes of the respective materials of the lens (4) and the lens cover (5) are not equal. The light distribution characteristic of (4) can be easily adjusted.

The lighting device (1) according to the third aspect can be realized in combination with the second aspect. In the lighting device (1) according to the third aspect, it is preferable that the material forming the lens (4) is acrylic resin and the material forming the lens cover (5) is borosilicate glass.

The lighting device (1) according to the third aspect can easily and inexpensively equalize the refractive indexes of the material forming the lens (4) and the material forming the lens cover (5).

The lighting device (1) according to the fourth aspect can be realized by a combination with any one of the first to third aspects. In the lighting device (1) according to the fourth aspect, it is preferable that the support member supports the lens (4) together with the solid-state light source. The heat-resistant temperature of the material forming the support member is preferably higher than the heat-resistant temperature of the material forming the lens (4).

The lighting device (1) according to the fourth aspect can reduce the possibility that a defect such as deformation occurs in the support member when the temperature rises abnormally.

The lighting device (1) according to the fifth aspect can be realized by a combination with any one of the first to fourth aspects. In the lighting device (1) according to the fifth aspect, it is preferable that the support member supports the lens (4) together with the solid-state light source. It is preferable that the material forming the support member is a metal material.

The lighting device (1) according to the fifth aspect can further reduce the possibility that a defect such as deformation occurs in the support member due to the temperature rise.

The lighting device (1) according to the sixth aspect can be realized by a combination with any one of the first to fifth aspects. In the lighting device (1) according to the sixth aspect, the heat resistant temperature of the material forming the holding member (6) is preferably higher than the heat resistant temperature of the material forming the lens (4).

The lighting device (1) according to the sixth aspect can reduce the possibility that a defect such as deformation occurs in the holding member (6) due to a temperature rise.

The lighting device (1) according to the seventh aspect can be realized in combination with the sixth aspect. In the lighting device (1) according to the seventh aspect, the material forming the holding member (6) is preferably a metal material.

The lighting device (1) according to the seventh aspect can further reduce the possibility that a defect such as deformation occurs in the holding member (6) due to a temperature rise.

The lighting device (1) according to the eighth aspect can be realized by a combination with any one of the first to seventh aspects. In the lighting device (1) according to the eighth aspect, the curvature of the surface of the lens cover (5) (exit surface 501 of the main body 50) is equal to the curvature of the surface of the lens (4) (emission surface 41), and , It is preferable that the thickness of the lens cover (5) is uniform.

The illuminating device (1) according to the eighth aspect has a lens (5) in consideration of the lens cover (5) as compared with the case where the curvature of the surface of the lens cover (5) and the curvature of the surface of the lens (4) are not equal. 4) The light distribution characteristics can be easily adjusted.

The lighting device (1) according to the ninth aspect can be realized by a combination with any one of the first to seventh aspects. In the lighting device (1) according to the ninth aspect, it is preferable that the thickness of the central portion of the lens cover (5) is thinner than the thickness of the peripheral portion of the lens cover (5).

The lighting device (1) according to the ninth aspect can suppress the attenuation of the light transmitted through the central portion of the lens cover (5) to increase the illuminance.

The lighting device (1) according to the tenth aspect can be realized by the combination with the eighth or the ninth aspect. In the lighting device (1) according to the tenth aspect, it is preferable that the lens cover (5) is in contact with the surface of the lens (4).

In the lighting device (1) according to the tenth aspect, the amount of light emitted from the lens cover (5) and the light distribution characteristics are substantially equal to those when the lens cover (5) does not come into contact with the surface of the lens (4). The size of the lens cover (5) can be reduced while maintaining the size.

The lighting device (1) according to the eleventh aspect can be realized by a combination with any one of the first to tenth aspects. In the lighting device (1) according to the eleventh aspect, it is preferable to provide each of a plurality of solid-state light sources and lenses (4). It is preferable that each of the plurality of lenses (4) is arranged on the optical path of the light emitted from one solid-state light source having a one-to-one correspondence among the plurality of solid-state light sources.

The lighting device (1) according to the eleventh aspect can finely adjust the light distribution characteristics by providing a plurality of solid-state light sources and a plurality of lenses (4).

The lighting device (1) according to the twelfth aspect can be realized in combination with the eleventh aspect. In the lighting device (1) according to the twelfth aspect, it is preferable that the lens cover (5) covers a plurality of lenses (4).

In the lighting device (1) according to the twelfth aspect, the lens cover (5) and the holding member (6) can be miniaturized in the front-rear direction and the left-right direction.

1 Lighting device 2 LED (solid-state light source)
3 LED holder (support member)
4 Lens 5 Lens cover 6 Holding member 41 Emission surface 50 Main body 501 Emission surface

Claims (10)

With one or more solid light sources,
A support member that supports the solid light source and
One or more lenses arranged on the optical path of light emitted from the solid-state light source, and
The lens cover that covers the lens and
A holding member for holding the lens cover is provided.
The lens cover is made of a translucent non-combustible material and is formed in a shape that protrudes in a direction away from the solid light source .
The support member supports the lens together with the solid light source.
The heat-resistant temperature of the synthetic resin material forming the support member is higher than the heat-resistant temperature of the synthetic resin material forming the lens.
Lighting equipment. The refractive index of the material forming the lens cover is equal to the refractive index of the material forming the lens.
The lighting device according to claim 1. The material forming the lens is acrylic resin, and the material forming the lens cover is borosilicate glass.
The lighting device according to claim 2. The heat-resistant temperature of the material forming the holding member is higher than the heat-resistant temperature of the material forming the lens.
The lighting device according to any one of claims 1 to 3 . The material forming the holding member is a metal material.
The lighting device according to claim 4 . The curvature of the exit surface of the lens cover is smaller than the curvature of the exit surface of the lens, and the thickness of the lens cover is uniform.
The lighting device according to any one of claims 1 to 5 . The thickness of the central portion of the lens cover is thinner than the thickness of the peripheral portion of the lens cover.
The lighting device according to any one of claims 1 to 5 . The incident surface of the lens cover is in contact with the exit surface of the lens.
The lighting device according to claim 6 or 7 . A plurality of each of the solid light source and the lens are provided.
Each of the plurality of lenses is arranged on the optical path of light emitted from one solid-state light source having a one-to-one correspondence among the plurality of solid-state light sources.
The lighting device according to any one of claims 1 to 8 . The lens cover covers the plurality of lenses.
The lighting device according to claim 9 .

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