Movable contact element and switch using the same
View Patent ↗A movable contact element including a lower sheet having a bottom surface, to which a substantially dome-shaped movable contact is bonded, is provided. The movable contact is made of a conductive thin metal plate, and an upper sheet with a light reflection property is disposed above the lower sheet. A space is formed between the lower sheet and the upper sheet, and a light transmitting portion is provided at the upper sheet. Light of a light emitting element from the side surface of the sheet propagates through the space between the upper sheet and the lower sheet with a light reflection property, while being reflected in a vertical direction, and lighting is performed through the light transmitting portions. Such a structure can perform lighting without unevenness by using one or two light emitting elements.
1. A movable contact element comprising:
a lower sheet having a bottom surface to which a substantially dome-shaped movable contact is bonded, the movable contact being made of a conductive thin metal plate; and
an upper sheet with a light reflection property that is disposed above the lower sheet,
wherein a space is formed between the lower sheet and the upper sheet, and a light transmitting portion is provided at the upper sheet above the movable contact,
wherein the upper sheet has a substantially dome-shaped portion corresponding to the substantially dome-shaped movable contact.
2. The movable contact element according to claim 1 ,
wherein the lower sheet is formed to have a light reflection property.
3. The movable contact element according to claim 1 ,
wherein a light diffusion layer is provided so as to face the space above the movable contact.
4. The movable contact element according to claim 1 ,
wherein the upper sheet and the lower sheet are swollen upward in the vicinity of the light transmitting portions.
5. A switch comprising:
the movable contact element according to claim 1 bonded to a top surface of a substrate having a fixed contact formed on the top surface thereof, the fixed contact facing the movable contact.
6. The movable contact element according to claim 1 ,
wherein the light transmitting portion comprises a hole formed in the upper sheet.
7. The movable contact element according to claim 1 ,
wherein the movable contact element has an end portion light-receiving from a light emitting element;
the movable contact is one of a plurality of movable contacts,
the plurality of movable contacts include a first movable contact and a second movable contact distant to the end portion more than the first movable contact;
the light transmitting portion is one of a plurality of light transmitting portions,
the plurality of light transmitting portions include a first light transmitting portion disposed at a position of corresponding to the first movable contact and a second light transmitting portion disposed at a position of corresponding to the second movable contact; and
an area of the second light transmitting portion is larger than an area of the first light transmitting portion.
8. A movable contact element comprising:
a lower sheet having a bottom surface to which a substantially dome-shaped movable contact is bonded, the movable contact being made of a conductive thin metal plate; and
an upper sheet with a light reflection property that is disposed above the lower sheet,
wherein a space is formed between the lower sheet and the upper sheet, and a plurality of light transmitting portions are provided at the upper sheet above the movable contact,
wherein the upper sheet has a substantially dome-shaped portion corresponding to the substantially dome-shaped movable contact.