Abstract: A light bead, a light plate, and a display device are disclosed. The light bead includes a light bead main body, a buffer portion, and a mating portion. The light bead main body includes a first end and a second end that are spaced apart from each other. The first end is the end of the light bead main body adjacent to a light-emitting side. The second end is the end of the light bead main body opposite to the light-emitting side. The buffer portion is arranged on the first end of the light bead main body and fits around the first end of the light bead main body. The mating portion is arranged on the second end of the light bead main body and is configured to mate with the light plate to install the light bead onto the light plate.

Abstract: In a safety device for an elevator, on one car door among a pair of car doors, a light-emitting/light-receiving unit is disposed facing downward at an upper end position of a vertical line separated by a predetermined distance from an end face in a closing direction, which is to abut the other car door, toward the side of the other car door, and a first reflecting member is disposed facing upward at a lower end position of the vertical line. A housing space that houses the light-emitting/light-receiving unit in a state where both car doors are closed is formed on the other car door, and a second reflecting member is disposed facing upward at a bottom portion of the housing space and extends from the same position as an end face in a closing direction of the other car door toward the back of the housing space.

Abstract: In a safety device for an elevator, on one car door among a pair of car doors, a light-emitting/light-receiving unit is disposed facing downward at an upper end position of a vertical line separated by a predetermined distance from an end face in a closing direction, which is to abut the other car door, toward the side of the other car door, and a first reflecting member is disposed facing upward at a lower end position of the vertical line. A housing space that houses the light-emitting/light-receiving unit in a state where both car doors are closed is formed on the other car door, and a second reflecting member is disposed facing upward at a bottom portion of the housing space and extends from the same position as an end face in a closing direction of the other car door toward the back of the housing space.