| 摘要 |
PROBLEM TO BE SOLVED: To prevent the pattern on a substrate from being damaged at the replacement of a battery. SOLUTION: A printed board 34 is provided in a case 30. The board 34 comprises an electronic circuit, having two power source terminals. A battery 52 is provided in the case 30, allowing its removal. The battery 52 supplies operation power source to the electronic circuit. One end of a connection terminal 40 is connected to one of the two power source terminals, while a negative pole connection terminal 42 integrated with the connection terminal 40 makes contact with the negative pole of the battery 52. The one end side of the connection terminal 40 and the printed board 34 are embedded inside a fixing material 56.
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