| 摘要 |
<p>A movable magnet type measuring instrument capable of suppressing, with a reduced cost, the leakage of damper oil while reducing an effect on the operating characteristics of a needle, comprising a magnet rotor (2) having a rotating shaft (1), a frame body (4) having a hollow part (3) for storing the magnet rotor (2) and supporting the rotating shaft (1), coils (5, 6) disposed on the outer periphery of the frame body (4) and driving the magnet rotor (2), and damper oil (D) contained in the hollow part (3), wherein a rough surface part (S) for suppressing the movement of the damper oil (D) is provided on at least either of the outer wall surface (21) of the magnet rotor (2) and the inner wall surface (31) of the hollow part (3).</p> |
