Patent ID: 8957332
Filing Date: 2015-02-17
Classification: H01H

Abstract:
1. A key switch structure, comprising: a key top; a link structure configured to support and guide the key top so that the key top moves in a pushing direction while the key top is pushed, and including a link member that supports the key top; a back plate that supports the link structure; a membrane sheet arranged on the back plate and facing toward the key top, and including a contact portion in the membrane sheet and connectable, in response to a predetermined pressure, to an electrical contact to form at least one closed circuit; an elastic member arranged between the key top and the membrane sheet that pushes and separates the key top from the back plate, and is elastically deformable to transmit the predetermined pressure to the contact portion; an arm bar that is arranged along a longer direction of the key top, and movably supports the key top, a part of the arm bar being supported movably at the back plate; and a pushing member arranged at the arm bar and configured to push the link structure while the key top is pushed, wherein the link member rotates with respect to the back plate while the key top moves in the pushing direction, and includes a receiver that faces toward the pushing member and that is closer to a rotational axis of the link member than an edge of the link member that contacts with the key top is, and the pushing member contacts with the receiver in the middle of the movement of the key to in the pushing direction.