| 摘要 |
A small-sized operation key, permits various kinds of inputs by a user to be detected and imparts the user with a tactile sensation in correspondence with each input to enable him/her to recognize his/her input. An operation key has a dome-like structure, a pressure detecting portion, a sheet member placed on the dome-like structure and pressure detecting portion, having a plate-like portion, and further having at least one first pusher and at least one second pusher formed on the lower surface of the plate-like portion, and an operating portion provided on the upper surface of the sheet member. In the operation key structure, the dome-like structure and the first pusher face each other and the pressure detecting portion and the second pusher face each other, and an initial load is applied to the pressure detecting portion by the second pusher. |
