| 摘要 |
<p>[PROBLEMS] A structure for a small-sized operation key, in which various kinds of inputs by a user can be accurately detected and that imparts the user with a predetermined tactile sensation in correspondence with various kinds of inputs by the user to enable them to recognize their inputs. [MEANS FOR SOLVING PROBLEMS] An operation key has a dome-like structure, a pressure detecting portion provided near the dome-like structure, 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 that are 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.</p> |
