Patent ID: 8496172

Claim:
A sensing mechanism comprising: a sheet switch comprising: a contact electrode formed in a dome shape with a conductive metal; a counter electrode disposed facing said contact electrode; and a metal sheet that is disposed on an opposite side of said counter electrode from a side facing said contact electrode, with insulating members interposed between the metal sheet and the counter electrode; wherein said contact electrode and said counter electrode contact each other to become conductive; and a shock-absorbing member which comes into contact with said metal sheet; wherein the sheet switch and the shock absorbing member are placed between a host device and a subordinate device which is mounted on the host device; wherein, in a state in which the subordinate device is mounted on a host device, said contact electrode and said counter electrode are configured to come in contact with each other; and wherein, in a state in which said subordinate device is removed from said host device, said contact electrode and said counter electrode are configured to be separated from each other.