| 摘要 |
PROBLEM TO BE SOLVED: To allow an electronic key to be further smoothly operated.SOLUTION: An electronic key 10 has an operation surface 16 on which a convex curve surface part 16a and a concave curve surface part 16b are formed. The formation of the convex curve surface part 16a makes it possible to reduce a torque component and, eventually, torque applied to the electronic key 10 in the case where the convex curve surface part 16a is pressed down. Thereby, operation to a first switch 11 is enabled in a further stable state of the electronic key 10. The formation of the concave curve surface part 16b makes it possible to restrain a thumb from being largely apart from the operation surface 16 even when sliding the thumb on the concave curve surface part 16b side. Thereby, operation of pressing down a fourth switch 14 is enabled without labor of extending the thumb, shifting a hold on the electronic key 10, and the like. |
