| 摘要 |
PROBLEM TO BE SOLVED: To establish the constant of spring of the conical spring small, while preventing that the space for housing the conical spring becomes too large. SOLUTION: The battery case 1 comprises in a case body 10 a battery housing chamber 12 in which a long battery 4 and a short battery 5 are selectively inserted. A conical spring 2 that pushes out both batteries 4, 5 from the battery housing chamber 12 in the direction of removing is provided at the bottom of the battery housing chamber 12, and the conical spring 2 has the maximum diameter part 20 faced toward the battery insertion side. At the bottom of the case body 10, a recessed part 11 that is connected to the battery housing chamber 12 and receives the maximum diameter part 20 of the conical spring 2 at the periphery part is formed, In the conical spring 2 that is bending transformed by being pushed by the long battery 4, a large diameter coil part 22 next to the maximum diameter part 20 is inserted in the recessed part 11 going through inside the maximum diameter part 20. COPYRIGHT: (C)2004,JPO
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