| 摘要 |
<p>PROBLEM TO BE SOLVED: To downsize a driven object by allowing relay of a delivery signal between a relayed object and the driven object. SOLUTION: During usage of a battery pack 3, the battery pack 3 is mounted to a power-supply mounting portion 13 of a personal computer body 2 of a driven object, and a direct current is supplied from a secondary battery in the battery pack 3 to an electronic circuit portion in the personal computer body. At this time, the electronic circuit portion is grounded through a ground terminal 18C to recognize mounting of the battery pack 3, and detect residual amount of the secondary battery based on an input voltage. In a keyboard operation, the battery pack 3 is rotated downward to project to the bottom side of the personal computer body 2 to slightly tilt the personal computer body 2 to facilitate the key operation and a slide-resistance rubber R prevents positional displacement. While, in usage of an AC adapter 5, the AC adapter 5 is connected with the already mounted battery pack 3. In addition, a battery pack 4 is connected with the mounted battery pack 3 to double supplied power.</p> |
