| 摘要 |
<p>PURPOSE:To prevent unjust lock release by a picking tool by fixing one end of a thin-walled cylindrical part fittingly to, a cylindrical key shank rigidly fixed to a key plate, and inserting a slider slidably into the other end of the cylindrical part. CONSTITUTION:One end of a thin-walled cylindrical part 37 is fittingly fixed to the fit-in outer peripheral surface 34 of a key shank 32 rigidly fixed to the key plate 31 of a key K, and the tip part 40 of the key plate 31 having guide protrusions 41, 42, inserted in a key guide groove, on the inside and outside thereof is inserted through in the elongated hole 38 of the cylindrical part 37. A slider 43 having a fit-in protrusion 44 to be fitted into the guide recessed part of a cylinder lock is slidably inserted into the other end of the cylindrical part 37, and both end parts of a slider spring 47 are inserted in the spring bearing seat 36 of the key shank 32 and the spring bearing seat 46 of the slider 43. Both end parts of the cylindrical part 37 are thereby protected by the key shank 32 and the slider 43 so as to be prevented from being deformed, and the clearance of a key hole can be made such a clearance as to inhibit the insertion of a picking tool, so that unjust lock release can be prevented.</p> |
