Key switch device, keyboard with the key switch device, and electronic device with the keyboard

摘要

A key switch device, wherein the second cam part (24B) of a second link member (4) is supported on a cantilever member (32) extended from the second link member (4) in the form of a cantilever and the cantilever member (32) is energized by a torsion spring (33) in the direction to allow the first cam part (24A) of a first link member (3) to abut mutually on the second cam part (24B), a cam face (25A) is formed on the second cam part (23B), a cam face (25A) abutting on the linear and punctate contact parts of the cam face (25A) of the second cam part (24B) at an acute angle in plan view and having a slanted surface (60) is formed on the first cam part (24A), and a clearance (63) formed from the contact part to the fixed point (64) of the torsion spring (33) is provided between the cam face (25A) of the second cam part (24B) and the slanted surface (60).