A PLURALITY OF PIN TYPE UPPER PINS FOR CYLINDRICAL LOCK

摘要

PROBLEM TO BE SOLVED: To provide a plurality of pin type upper pins capable of preventing the running out of an upper pin from an outer barrel even though an inner barrel plug is pulled out thereby permitting to perform a cylindrical lock rearrangement work much easier by arranging a plurality of pins corresponding to multiple element pins placed as built-in elements in a united manner in an inner barrel plug and compression springs exerting the plural pins in a casing arranged in the outer barrel of the cylindrical lock; also to provide a cylindrical lock built with a mechanism for applying a dead lock by utilizing the plurality of the pin type upper pins used for the upper pins for multiple element pins or publicly known upper pins as they are in order to remarkably improve the resisting performance against picking and to create new functions for the upper pins. SOLUTION: The plurality of pins corresponding to the multiple elements in the inner barrel plug and compression springs for exerting the plurality of pins are built in a united manner in the outer barrel of the cylindrical lock. COPYRIGHT: (C)2003,JPO