| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a coordinate input device which does not deteriorate the operability of an operation member, by changing the shape of the operation member. SOLUTION: An input member N for inputting coordinates to a display portion (not shown in the drawing), and an operation member S for operating this input member N, are provided. The input member N can be operated with the operation member S by pressing an operation face on its surface with a thumb by single hand operation, and the operation member S is approximately in an oval shape. The operation member S is formed so as to satisfy the relation of R1<R2, when the dimension from one-side peripheral surface of the operation member S up to the center line T passing the center of the operation member S on a side near to the display portion is represented as R1, and the dimension from the other-side peripheral surface of the operation member S up to the center line T on the side distant from the display portion is represented as R2.</p> |
