| 摘要 |
PURPOSE:To facilitate replacement of a possible poor magnetic body and enable reuse of a part, by free to dismounting ratchet engagement of the magnetic body with a sliding body borne on a disphragm. CONSTITUTION:A cylindrical parts 2 provided with engagement projections is placed at the outside center of the base bench 1 of a rigid body and bobbin 6 provided with the primary side coil 7 and secondary side coil 8 is fit removably and the system is fastened in its place. And, a sliding body 11 receives floating face of a disphragm 9 with the entire surface of the circular disc body 12 uniformly in such a way that the hollow shaft 13 is held constantly in the vertical direction and allows a bearing opening 4 to displace. A the hollow shaft 13 of the sliding body 11, an adjusting thread 20 rests it end onto the bench 19 and its so engaged that rotations of the screw 20 allows moving piece 11 and magnetic body 17 to make vertical microscopic adjustments. Further, on the circular wall 14, notch 25 and guiding groove 26 are aligned so as positioning of the magnetic body 17 in the constant direction is possible and it can be inserted and fixed free to dimount it. Thus, reuse of many parts, such as diaphragm, etc. can be made.
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