JP2020132277A - Dimming device of lighting device for elevator car - Google Patents

Abstract

To provide a dimming device of a lighting device for an elevator car by that it is not necessary for a user to separately prepare an instrument for reducing blue light.SOLUTION: A dimming device 9 includes a light absorbing member 10. The light absorbing member 10 is arranged to be fixed to an optical path 12 reaching an intra-car space 3 below a lighting device 2 inside a car 1 from a light emitting surface 7 of a light source 4 of the lighting device 2 of the car 1 of an elevator. The transmittance of the light absorbing member 10 with respect to light with a wavelength in the range of blue light among light emitted from the light source 4 is lower than the transmittance of the light absorbing member 10 with respect to visible light with a wavelength that is larger than the wavelength in the range of blue light among light emitted from the light source 4.SELECTED DRAWING: Figure 2

Description

The present invention relates to a dimming device for an elevator car lighting device.

Patent Document 1 describes an example of an elevator lighting device. The lighting device includes a light diffusing member. The light diffusing member covers the light source. The light diffusing member is formed of a material that transmits light rays.

Japanese Unexamined Patent Publication No. 4-75991

However, in the lighting device described in Patent Document 1, the light diffusing member transmits light rays regardless of the wavelength. Therefore, depending on the nature of the light source, the proportion of blue light in the spectrum of light in the car interior space may increase. In this case, a user who does not like blue light needs to individually prepare a device for reducing blue light.

The present invention has been made to solve such a problem. An object of the present invention is to provide a dimming device for an elevator car lighting device, which does not require the user to individually prepare a device for reducing blue light.

The dimming device of the elevator car lighting device according to the present invention is fixed to the light path from the light emitting surface of the light source of the elevator car lighting device to the inside of the car to the car interior space below the lighting device. The light emission from the light source has a transmittance lower than that for visible light having a wavelength longer than the wavelength in the blue light range among the light emitted from the light source. It is equipped with a member.

According to the present invention, the dimming device includes a light absorbing member. The light absorbing member is fixedly arranged in the optical path from the light emitting surface of the light source of the lighting device of the elevator car to the space inside the car below the lighting device. The transmittance of the light-absorbing member for light having a wavelength in the blue light range of the light emitted from the light source is lower than the transmittance of the light-absorbing member for visible light having a wavelength longer than the wavelength in the blue light range of the light emitted from the light source. .. This eliminates the need for the user to individually prepare a device for reducing blue light.

It is a figure inside the car of the elevator which concerns on Embodiment 1. FIG. It is a vertical sectional view of the lighting apparatus which concerns on Embodiment 1. FIG. It is a vertical sectional view of the lighting apparatus which concerns on the modification of Embodiment 1. FIG. It is a vertical sectional view of the lighting apparatus which concerns on Embodiment 2. FIG. It is a vertical sectional view of the lighting apparatus which concerns on the modification of Embodiment 2. It is a vertical sectional view of the lighting apparatus which concerns on Embodiment 3. FIG.

A mode for carrying out the present invention will be described with reference to the accompanying drawings. In each figure, the same or corresponding parts are designated by the same reference numerals, and duplicate description will be appropriately simplified or omitted.

Embodiment 1.
FIG. 1 is a view of the inside of the elevator car according to the first embodiment.

Elevators are installed in buildings. The building has multiple floors. In an elevator, a hoistway (not shown) runs through multiple floors. The elevator is equipped with a car 1. The car 1 is a device that transports users between a plurality of floors by traveling vertically inside the hoistway. The basket 1 has, for example, a rectangular parallelepiped shape. The car 1 includes a lighting device 2. The lighting device 2 is provided on the ceiling of the car 1, for example. The lighting device 2 is a device that illuminates the car interior space 3. The car interior space 3 is a space inside the car 1 and below the lighting device 2. The car interior space 3 is a space on which the user rides.

FIG. 2 is a vertical sectional view of the lighting device according to the first embodiment.

The lighting device 2 includes a light source 4, a cover 5, and a lighting plate 6.

The light source 4 is a device that emits light. The light source 4 has a light emitting surface 7. The light emitting surface 7 is the surface of the light source 4. In this example, the light source 4 is an LED (Light Emitting Diode) light source. The LED light source includes a plurality of LED elements 8. The light emitting surface 7 is the surface of each of the plurality of LED elements 8. The light source 4 is provided on the ceiling of the car 1. The light emitting surface 7 is directed downward. In this example, the LED element 8 is formed by an LED chip enclosed in a resin containing a phosphor. Here, the phosphor is, for example, a yellow phosphor. The LED chip is, for example, a blue LED. The LED element 8 emits pseudo-white light for illumination by emitting light from a blue LED and fluorescence from a yellow phosphor.

The cover 5 is a member that covers the light source 4. The cover 5 covers the light source 4 from below, for example. The cover 5 is made of a material that transmits visible light. The cover 5 may diffuse the visible light to be transmitted.

The lighting plate 6 is a member exposed to the car interior space 3. The lighting plate 6 is provided, for example, below the cover 5. The shape of the portion of the lighting plate 6 exposed to the car interior space 3 is, for example, a rectangular shape. The lighting plate 6 is made of a material that transmits visible light. The lighting plate 6 may diffuse the visible light to be transmitted.

Here, for example, an elevator user or manager may desire to reduce the proportion of blue light in the light in the car interior space 3. At this time, the dimming device 9 is attached to the lighting device 2. Here, the wavelength range of blue light is the wavelength range from 380 nm to 500 nm.

The dimming device 9 includes a light absorbing member 10 and a pressing plate 11.

The light absorbing member 10 is, for example, a sheet made of resin. The transmittance of the light absorbing member 10 with respect to the light having a wavelength in the range of blue light among the light emitted from the light source 4 is such that the light absorbing member 10 has a wavelength longer than the wavelength in the range of blue light among the light emitted from the light source 4. Lower than permeability. Here, the transmittance is the intensity ratio of the incident light to the transmitted light with respect to the light absorbing member 10. The light absorbing member 10 is fixedly provided on the upper surface of the lighting plate 6. The shape of the light absorbing member 10 is matched to the shape of the portion of the lighting plate 6 exposed to the car interior space 3. The shape of the light absorbing member 10 is, for example, a rectangular shape.

The light absorbing member 10 is formed of, for example, a material that selectively absorbs blue light. The light absorbing member 10 may be formed of, for example, a material that selectively reflects blue light. The light absorbing member 10 may be, for example, a resin in which a substance that selectively absorbs blue light is dispersed. The light absorbing member 10 may be, for example, a resin coated with a substance that selectively absorbs blue light by coating or the like. The light absorbing member 10 may be, for example, a resin coated with a substance that selectively reflects blue light by coating or the like.

The pressing plate 11 is a plate that presses the light absorbing member 10. The holding plate 11 is an example of a mounting portion. The pressing plate 11 covers the light absorbing member 10 from above. The shape of the holding plate 11 is, for example, a rectangular shape larger than the light absorbing member 10. The holding plate 11 is made of a material that transmits visible light. The holding plate 11 may diffuse the visible light to be transmitted. The holding plate 11 is attached to, for example, the outer peripheral portion of the lighting plate 6. The holding plate 11 is attached to the lighting plate 6 by, for example, bonding, screwing, or riveting.

Subsequently, the function of the dimming device 9 will be described.

The light emitted from the light source 4 propagates from the light emitting surface 7 to the car interior space 3. The optical path 12 of the light emitted from the light source 4 passes from the light emitting surface 7 in the order of, for example, the cover 5, the holding plate 11, the light absorbing member 10, and the lighting plate 6 to reach the car interior space 3. That is, the light absorbing member 10 is provided in the optical path 12.

The light absorbing member 10 reduces the proportion of blue light in the transmitted light due to the wavelength dependence of the transmittance. The light transmitted through the light absorbing member 10 propagates in the car room space 3. As a result, the proportion of blue light of light in the car interior space 3 becomes lower than the proportion of blue light of light emitted by the light source 4.

The pressing plate 11 may be, for example, a frame or plate that presses the four sides of the light absorbing member 10. At this time, the holding plate 11 may be made of an opaque material. Further, the dimming device 9 does not have to include the holding plate 11. The light absorbing member 10 may be directly attached to the illumination plate 6 by, for example, bonding, screwing, or riveting.

Further, the phosphor of the LED element 8 may be a phosphor of a plurality of colors such as red and green. The LED element 8 may have a phosphor coated on the surface of the LED chip. The LED element 8 may be formed of LED chips having a plurality of colors such as red, green, and blue.

Next, another example of the dimmer 9 will be described with reference to FIG.
FIG. 3 is a vertical sectional view of the lighting device according to the modified example of the first embodiment.

The lighting device 2 includes a light source 4 and a lighting plate 6.

The dimming device 9 includes a light absorbing member 10.

The light absorbing member 10 covers the light source 4 from below, for example. In this example, the light absorbing member 10 is, for example, a cover 5 made of resin. The light absorbing member 10 is provided, for example, in place of the cover 5 of the lighting device 2.

Subsequently, the function of the dimming device 9 in this example will be described.

The light emitted from the light source 4 propagates from the light emitting surface 7 to the car interior space 3. The optical path 12 of the light emitted from the light source 4 passes from the light emitting surface 7 in the order of, for example, the light absorbing member 10 and the lighting plate 6, and reaches the car interior space 3.

The light absorbing member 10 reduces the proportion of blue light in the transmitted light due to the wavelength dependence of the transmittance. The light transmitted through the light absorbing member 10 propagates in the car room space 3. As a result, the proportion of blue light of light in the car interior space 3 becomes lower than the proportion of blue light of light emitted by the light source 4.

The light absorbing member 10 may be a plate-shaped member provided in place of the lighting plate 6 of the lighting device 2.

As described above, the dimming device 9 according to the first embodiment includes the light absorbing member 10. The light absorbing member 10 is fixedly arranged in the optical path 12 from the light emitting surface 7 of the light source 4 of the lighting device 2 of the elevator car 1 to the car interior space 3. The car interior space 3 is a space inside the car 1 and below the lighting device 2. The transmittance of the light absorbing member 10 with respect to the light having a wavelength in the range of blue light among the light emitted from the light source 4 is the transmittance of the absorbing member 10 with respect to visible light having a wavelength longer than the wavelength in the range of blue light among the light emitted from the light source 4. Lower than permeability.

The light emitted from the light source 4 passes through the light absorbing member 10 and reaches the car room space 3. The light absorbing member 10 reduces the proportion of blue light in the transmitted light due to the wavelength dependence of the transmittance. Therefore, the proportion of blue light in the car interior space 3 is lower than the proportion of blue light emitted by the light source 4. This eliminates the need for the user to individually prepare a device for reducing blue light. In addition, the proportion of ultraviolet rays in the car interior space 3 is also reduced. Therefore, the dimming device 9 can suppress the invasion of insects attracted by ultraviolet rays into the car interior space 3.

Further, when the light source 4 is an LED light source, the transmittance of the light absorbing member 10 with respect to the light having a wavelength in the range of the blue light among the light emitted from the LED light source is within the range of the blue light among the light emitted from the LED light source. It is lower than the transmittance of the light absorbing member 10 for visible light having a wavelength longer than the wavelength.

In general, an LED light source for lighting requires an LED element that emits light in a short wavelength region of visible light. The short wavelength region of visible light overlaps the wavelength range of blue light. Therefore, the light emitted from the LED light source for lighting contains a large amount of blue light components. Further, an LED light source that emits pseudo-white light by fluorescence of a phosphor may not include an LED element that emits light having a different wavelength in addition to an LED element that emits light having a short wavelength that excites the phosphor. In the LED light source, it is difficult to control the spectrum of the LED light source by controlling the light emission of the LED element. With respect to the lighting device 2 provided with such an LED light source, the dimming device 9 effectively reduces the proportion of blue light in the car interior space 3.

Further, the dimming device 9 includes a mounting portion. The mounting portion attaches the light absorbing member 10 to the lighting device 2.

As a result, the light absorbing member 10 is more reliably attached to the lighting device 2. Further, the light absorbing member 10 is easily attached to the lighting device 2 by the attaching portion. As a result, the dimming device 9 can be easily applied to the existing lighting device 2.

Embodiment 2.
In the second embodiment, the differences from the examples disclosed in the first embodiment will be described in detail. As for the features not described in the second embodiment, any of the features of the examples disclosed in the first embodiment may be adopted.

FIG. 4 is a vertical sectional view of the lighting device 2 according to the second embodiment.

In this example, the lighting device 2 is an indirect lighting device. The lighting device 2 includes a support portion 13 and a light source 4.

The support portion 13 is provided on the ceiling of the car 1. In this example, the support portion 13 includes a support plate 14. The support plate 14 is a plate-shaped member suspended from the ceiling of the car 1. The shape of the support plate 14 is, for example, a rectangular shape. The lower surface of the support plate 14 faces the car interior space 3. The support plate 14 is made of an opaque material.

The light source 4 is supported by the support portion 13. The light source 4 is provided on the upper surface of the support plate 14. In this example, the light source 4 is an LED light source. The LED light source includes a plurality of LED elements 8. The light emitting surface 7 is the surface of each of the plurality of LED elements 8. The light emitting surface 7 is directed upward.

The dimming device 9 includes, for example, four light absorbing members 10. The light absorbing member 10 is, for example, a plate-shaped member made of resin. The shape of the light absorbing member 10 is, for example, trapezoidal. The lower end of the light absorbing member 10 is provided along one side of the support plate 14. The light absorbing member 10 is tilted toward the inside of the support plate 14. The upper end of the light absorbing member 10 is fixed to the ceiling. The dimming device 9 surrounds the light source 4 from all sides by four light absorbing members 10.

Subsequently, the function of the dimming device 9 in this example will be described.

The light emitted from the light source 4 is reflected by the ceiling from the light emitting surface 7 and then propagates to the car interior space 3. The optical path 12 of the light emitted from the light source 4 passes through the light absorbing member 10 from the light emitting surface 7 and reaches the car room space 3.

The light absorbing member 10 reduces the proportion of blue light in the transmitted light due to the wavelength dependence of the transmittance. The light transmitted through the light absorbing member 10 propagates in the car room space 3. As a result, the proportion of blue light of light in the car interior space 3 becomes lower than the proportion of blue light of light emitted by the light source 4.

Next, another example of the dimmer 9 will be described with reference to FIG.
FIG. 5 is a vertical sectional view of the lighting device according to the modified example of the second embodiment.

In this example, the sides of the car 1 are made of a material containing ferromagnets such as iron.

In this example, the lighting device 2 is an indirect lighting device. The lighting device 2 includes a support portion 13 and a light source 4.

The support portion 13 is provided on the upper portion of the wall surface of the car 1. The support portions 13 are provided on the four side surfaces of the car 1. The lower surface of the support portion 13 faces the car interior space 3. The support portion 13 includes a light-shielding plate 15 inside the car 1 in the horizontal direction. The light-shielding plate 15 is a plate-shaped member that rises upward from the lower surface of the support portion 13. The light-shielding plate 15 is made of a material containing a ferromagnet such as iron.

The light source 4 is supported by the support portion 13. The light source 4 is provided outside the light-shielding plate 15 in the horizontal direction of the car 1. In this example, the light source 4 is a tubular LED light source. The LED light source includes, for example, a plurality of LED elements 8 inside a tube that transmits visible light. The light emitting surface 7 is a side surface of a tube that transmits visible light.

The dimming device 9 includes a light absorbing member 10 and a magnet 16.

The light absorbing member 10 is, for example, a plate-shaped member made of resin. The light absorbing member 10 is provided from the side surface of the car 1 over the light shielding plate 15 of the support portion 13. The light absorbing member 10 covers the light source 4 from above.

The magnet 16 is provided at the end of the light absorbing member 10. The magnet 16 is attracted to the side surface of the car 1 and the light-shielding plate 15 of the support portion 13 by magnetic force. The magnet 16 is an example of a mounting portion.

Subsequently, the function of the dimming device 9 in this example will be described.

The light-shielding plate 15 shields the direct light emitted by the light source 4 from the car interior space 3. The light emitted from the light source 4 is reflected from the light emitting surface 7 by the ceiling, the light-shielding plate 15, or the like, and then propagates to the car interior space 3. The optical path 12 of the light emitted from the light source 4 passes through the light absorbing member 10 from the light emitting surface 7 and reaches the car room space 3.

The light absorbing member 10 reduces the proportion of blue light in the transmitted light due to the wavelength dependence of the transmittance. The light transmitted through the light absorbing member 10 propagates in the car room space 3. As a result, the proportion of blue light of light in the car interior space 3 becomes lower than the proportion of blue light of light emitted by the light source 4.

As described above, the mounting portion of the dimming device 9 according to the second embodiment attaches the light absorbing member 10 to the lighting device 2 by magnetic force.

This makes it easier to apply the dimming device 9 to the lighting device 2.

Embodiment 3.
In the third embodiment, the differences from the examples disclosed in the first embodiment or the second embodiment will be described in detail. As for the features not described in the third embodiment, any of the features of the examples disclosed in the first embodiment or the second embodiment may be adopted.

FIG. 6 is a vertical sectional view of the lighting device 2 according to the third embodiment.

In this example, the lighting device 2 is an indirect lighting device. The lighting device 2 includes a support portion 13 and a light source 4.

The support portion 13 is provided on the upper portion of the wall surface of the car 1. The support portions 13 are provided on the four side surfaces of the car 1. The lower surface of the support portion 13 faces the car interior space 3. The support portion 13 includes a light-shielding plate 15 inside the car 1 in the horizontal direction. The light-shielding plate 15 is a plate-shaped member that rises upward from the lower surface of the support portion 13.

The light source 4 is supported by the support portion 13. The light source 4 is provided outside the light-shielding plate 15 in the horizontal direction of the car 1. In this example, the light source 4 is a tubular LED light source. The LED light source includes, for example, a plurality of LED elements 8 inside a tube that transmits visible light. The light emitting surface 7 is a side surface of a tube that transmits visible light.

The dimming device 9 includes a light absorbing member 10.

The light absorbing member 10 is, for example, a heat shrink film made of resin. The light absorbing member 10 is provided in close contact with the light emitting surface 7 of the light source 4. The light absorbing member 10 is brought into close contact with the light source 4 by, for example, being covered with the light source 4 and then contracting by heating.

Subsequently, the function of the dimming device 9 in this example will be described.

The light-shielding plate 15 shields the direct light emitted by the light source 4 from the car interior space 3. The light emitted from the light source 4 is reflected from the light emitting surface 7 by the ceiling, the light-shielding plate 15, or the like, and then propagates to the car interior space 3. The optical path 12 of the light emitted from the light source 4 passes through the light absorbing member 10 from the light emitting surface 7 and reaches the car room space 3.

The light absorbing member 10 reduces the proportion of blue light in the transmitted light due to the wavelength dependence of the transmittance. The light transmitted through the light absorbing member 10 propagates in the car room space 3. As a result, the proportion of blue light of light in the car interior space 3 becomes lower than the proportion of blue light of light emitted by the light source 4.

As described above, the light absorbing member 10 of the dimming device 9 according to the third embodiment is in close contact with the light emitting surface 7.

As a result, the dimming device 9 does not require a separate member to support the light absorbing member 10. Therefore, the dimmer 9 becomes compact. As a result, the increase in the weight of the car 1 is suppressed. In addition, leakage of blue light into the car interior space 3 is reduced. In particular, when the light source 4 is an LED light source, the amount of heat generated from the light emitting surface 7 of the light source 4 is small. Therefore, the deterioration of the light absorbing member 10 due to the close contact with the light emitting surface 7 is less likely to occur.

Further, the light absorbing member 10 is formed of a heat shrink film.

This facilitates mounting of the light absorbing member 10 on the light emitting surface 7. In particular, it becomes easy to apply the dimming device 9 to the existing lighting device 2.

1 car, 2 lighting device, 3 car room space, 4 light source, 5 cover, 6 lighting board, 7 light emitting surface, 8 LED element, 9 dimming device, 10 light absorbing member, 11 holding plate, 12 optical path, 13 support part, 14 Support plate, 15 Shading plate, 16 Magnet

Claims (6)

It is fixedly arranged in the light path from the light emitting surface of the light source of the lighting device of the elevator car to the inside of the car to the car interior space below the lighting device, and is the range of blue light among the light emitted from the light source. A dimming device for an elevator car illuminator provided with a light absorbing member having a transmittance for light of a wavelength of 1 or less than that for visible light having a wavelength longer than the wavelength in the range of blue light among the light emitted from the light source. When the light source is an LED light source, the transmittance of the light absorbing member with respect to light having a wavelength in the range of blue light among the light emitted from the LED light source is within the range of blue light among the light emitted from the LED light source. The dimming device for an elevator car lighting device according to claim 1, wherein the transmittance is lower than the transmittance of the light absorbing member for visible light having a wavelength longer than the wavelength. The dimming device for an elevator car lighting device according to claim 1 or 2, further comprising a mounting portion for attaching the light absorbing member to the lighting device. The mounting portion is a dimming device for a lighting device for an elevator car according to claim 3, wherein the light absorbing member is attached to the lighting device by magnetic force. The dimming device for an elevator car lighting device according to claim 1 or 2, wherein the light absorbing member is in close contact with the light emitting surface. The light absorbing member is a dimming device for an elevator car lighting device according to claim 5, wherein the light absorbing member is formed of a heat shrink film.

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