PROBLEM TO BE SOLVED: To provide an exercise-amount measuring instrument, a battery of which is easily exchanged, while executing radiocommunication without any trouble.SOLUTION: The exercise-amount measuring instrument includes a battery storage part in which a button type battery is stored, and a lid member 30 screwed in the battery storage part. The lid member 30 includes attaching/detaching 40 and 41 allowing attachment/detachment of the button type battery, on an inner surface 38 in a screwed state, and an RFID antenna 19 provided to surround the periphery of an attachment area 39 of the button type battery. The attaching/detaching means 40 and 41 include: a pair of guide parts 40a and 41A located adjacent to the attachment area 39 and at least erected at opposite areas respectively, in a diameter direction DL of the attachment area 39 so as to guide attachment/detachment of the button type battery and pawl parts 40B and 41B formed integrally with the pair of guide parts 40a and 41A respectively and locked so as to press the button type battery from the upper side.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2016,JPO&INPIT【課題】無線通信を支障なく行いつつ、電池交換を容易に行える運動量測定装置を提供すること。【解決手段】ボタン型電池が収容される電池収容部と、電池収容部にネジ式となって螺着される蓋部材30とを備え、蓋部材30は、螺着した状態における内面38にボタン型電池が着脱可能な着脱手段40,41と、ボタン型電池の装着領域39の周囲を囲むようにしたRFID用アンテナ19とを有し、着脱手段40,41は、装着領域39に隣接し、少なくとも、装着領域39の直径方向DLにおける正反対の領域の夫々に立設することで、ボタン型電池の着脱を案内する一対のガイド部40a,41Aと、一対のガイド部40a,41Aの夫々と一体的に形成され、ボタン型電池を上から押えるようにして係止する爪部40B,41Bとを有する。【選択図】図5
