| 摘要 |
PURPOSE:To absorb a distortion caused by a cartridge case and the like and a distortion due to an error in attaching a leaf spring support member by a coil spring and make a stable control operation possible by supporting an end of the leaf spring support member supporting a cantilever by a coil spring and applying constantly a fixed tension. CONSTITUTION:An end of a support member supporting a cantilever is fixed to an end of a coil spring. When a force T from an outside is applied to a cartridge case 6, a connecting section A of a support member and a coil spring is changed to a position of A'. Since a vertical stiffness Ks with respect to the cantilever 2 of the support member 5 is considerably largely set in comparison with the stiffness Kc of the coil spring, the stiffness Ks is substantially fixed and the external force T is absorbed by a change of the coil spring. In this manner, a distortion by an external force is absorbed by a coil spring, so that an influence applied to an axial control operation in a direction of the cantilever 3 is scarcely present.
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