| 摘要 |
PROBLEM TO BE SOLVED: To reduce a cover space and make the shape of a main body compact by assembling cylindrical batteries in a lattice shape of two rows right and left and two steps up and down in a simple terminal mechanism using a coil terminal of a battery holder in which four cylindrical batteries are housed in series. SOLUTION: Guide recesses 22, 22 of two rows right and left are formed in each of a front side wall 23 and a rear side wall 24 of a battery holder 21. The recess width of each of the guide recesses 22 is made two steps up and down, and the upper step is made larger than the lower step. Positive coil parts 29a, 32a and negative coil parts 29b, 31b having large diameter are engaged in the upper steps of the guide recesses 22, 22..., positive coil parts 30a, 31a and negative coil parts 30b, 33b having small diameter are engaged in the lower steps. Electrodes in the upper and lower steps of each guide recess 22 are formed in the same. |
