| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a battery pack having a board holder, a circuit board, and a cap attached at the end face of a battery, the cap having a notch formed at its end part and being designed to restrain a crack from occurring in its notch wall part, etc. due to impact shock when, for example, the battery pack is dropped.SOLUTION: Referring to the transverse section at the left end part of a cap 50, in front of a central recess 54a of a notch 54, a front wall part 57a is opposed to a peripheral plate part 52 with a space 55a therebetween. At the back of the central recess 54a, a rear wall part 57b is opposed to the peripheral plate part 52 with a space 56b therebetween. A board holder 20 is provided with a rib 27, in which the tip of a front rib part 271 has its entry position in the space 55a on the inner surface side at a spot where the front wall part 57a, a front top plate part 55 and the peripheral plate part 52 are connected in form of the letter U, and the tip of a rear rib part 272 has its entry position in the space 56a on the inner surface side at a spot where the front wall part 57b, a rear top plate part 56 and the peripheral plate part 52 are connected in form of the letter U.</p> |
