| 摘要 |
An operation device includes: a key top arranged so that part thereof is inserted into a key arrangement hole formed in a casing of an electronic apparatus and being movable in a given direction on the basis of an initial position at the time of operation; a movable magnet attached to the key top; a magnetic body fixed so as to face the movable magnet and giving a force to move the key top in a direction toward the initial position by absorptivity generated between the magnetic body and the movable magnet; a hall device detecting a movement state of the key top due to a magnetic field generated by the movable magnet; and a circuit substrate on which the hall device is mounted. |
