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JP-7857166-B2 - Lighting device

JP7857166B2JP 7857166 B2JP7857166 B2JP 7857166B2JP-7857166-B2

Inventors

  • 平 大輔
  • 多田 亮平

Assignees

  • シャープ株式会社

Dates

Publication Date
20260512
Application Date
20220614

Claims (6)

  1. Multiple divided light-emitting parts, A central part connected to each of the plurality of light-emitting parts and supporting the plurality of light-emitting parts , A holding plate that holds the plurality of light-emitting parts from above, Equipped with , The holding plate comprises a plurality of holding parts corresponding to each of the plurality of light-emitting parts, The holding portion includes a hook portion that supports the corresponding light-emitting portion, The lighting device is characterized in that the hook portion is located directly above the outer ring of the corresponding light-emitting portion .
  2. The lighting device according to claim 1, further comprising a tilt prevention mechanism for preventing the plurality of light-emitting parts on the outer ring of the lighting device from tilting downward.
  3. The lighting device according to claim 2, characterized in that the tilt prevention mechanism comprises a connecting portion connected to each of the plurality of light-emitting units, a connected portion provided within the central portion to receive the connecting portion, an adjustment screw that penetrates the connecting portion vertically to adjust the tilt of the plurality of light-emitting units, and an adjustment screw receiver that receives the adjustment screw.
  4. The lighting device according to claim 1 , characterized in that the retaining plate is provided with a gripping portion for gripping the retaining plate.
  5. The lighting device according to claim 1 , characterized in that the retaining plate has a plurality of holes.
  6. The lighting device according to any one of claims 1 to 5, characterized in that the central part is provided with a cover for the central part.

Description

This disclosure relates to lighting devices. In devices such as ceiling lights, reducing glare without changing the brightness requires increasing the area of the light-emitting portion and lowering the brightness of the light-emitting portion. A common method for reducing glare in typical ceiling lights is simply to enlarge the circular or rectangular light-emitting portion to increase its surface area. For example, Patent Document 1 discloses a lighting device comprising a first light distribution section and a second light distribution section, having spectral emission characteristics such as a correlated color temperature of 5400K to 7000K, a Duv of -6 to 5, a chroma value of 2.7 or less, and an average color rendering index Ra of 80 or more. Patent Document 2 discloses a lighting fixture comprising a high-intensity lamp, a reflector, and a glare-cut cap having an auxiliary reflector, characterized in that the auxiliary reflector has a parabolic auxiliary reflective surface with the center of the high-intensity lamp as its focal point, and the axis of the auxiliary reflective surface is inclined with respect to the central axis of the high-intensity lamp in a range of more than 0° to less than 90°. Patent No. 6655832Patent No. 5213253 Figure 1 is a schematic front view showing the lighting device according to this disclosure.Figure 2 is a schematic front view showing the lighting device according to this disclosure.Figure 3 is a schematic front view of a conventional lighting device.Figure 4 is a schematic front view of a conventional lighting device.Figure 5 is a front view of the lighting device according to this disclosure with the central cover attached.Figure 6 is a side view of the lighting device according to this disclosure with the central cover attached.Figure 7 is a side view showing how the light-emitting portion of the outer ring of the lighting device according to this disclosure is tilted downward.Figure 8 is a side view of a lighting device equipped with a tilt prevention mechanism.Figure 9 is a perspective view of a lighting device equipped with a retaining plate.Figure 10 is a side view of a lighting device equipped with a retaining plate.Figure 11A is a magnified view of the area around the hook portion in Figure 10, showing the state before the hook portion supports the light-emitting portion.Figure 11B is a magnified view of the area around the hook portion in Figure 10, showing the state after the hook portion supports the light-emitting portion.Figure 12 is a front view of a retaining plate with holes. The following describes preferred embodiments of this disclosure in detail with reference to the drawings. Note that the embodiments described below are not intended to unduly limit the scope of the claims of this disclosure, and not all configurations described in these embodiments are necessarily essential as solutions to the disclosure. In the drawings, the X and Y axes represent the width direction, and the Z axis represents the height direction. The +Z direction represents the ceiling direction, and the -Z direction represents the floor direction. Figures 1 and 2 are schematic front views of the lighting device 100 according to this disclosure. As shown in Figures 1 and 2, the lighting device 100 according to this disclosure comprises a light-emitting section 10 and a central section 20. The light-emitting unit 10 is divided into multiple parts. In other words, the light-emitting unit 10 itself is not enlarged; instead, multiple conventionally sized light-emitting units 10 are combined. The lighting device 100 shown in Figure 1 has a light-emitting unit 10 divided into four parts, comprising divided light-emitting units 10a, 10b, 10c, and 10d. The lighting device 100 shown in Figure 2 has a light-emitting unit 10 divided into three parts, comprising divided light-emitting units 10a, 10b, and 10c. As shown in Figure 1, the divided light-emitting sections 10a, 10b, 10c, and 10d may be rectangular. Alternatively, as shown in Figure 2, the divided light-emitting sections 10a, 10b, and 10c may be circular. As seen in the conventional lighting devices shown in Figures 3 and 4, one might consider simply increasing the area of the light-emitting part to reduce glare without changing the brightness. However, as the area of the light-emitting part increases, the device becomes larger and heavier, making installation difficult. Furthermore, as the area of the light-emitting part increases, the size of the cover and chassis for the light-emitting part also increases, leading to larger mold sizes and higher mold costs. Part prices also increase. As the area of the light-emitting part increases, the product packaging box also becomes larger, making transportation difficult. Additionally, for patients who have undergone cataract surgery and are using intraocular lenses, the glare from the light-emitting part can cause significant discomfort. Moreover, while it is well known that alertness imp