| 摘要 |
A hollow box-shaped mover or a needle is moved, without using a power transmission mechanism midway, to a portion according to a measured value of a graduation portion, by housing the mover between a dial and a surrounding facing and in a guide groove portion formed along a graduation portion, in a manner to move along the guide groove portion, by attaching a needle to the mover, and by moving the mover along the guide groove portion by a linear motor unit, which is constituted to have a multipolar magnet of the guide groove portion and two coils housed in the mover.
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