Improved lock adopting external milling blade idling lock cylinder

Abstract

The invention discloses an improved lock adopting an idle-rotating lock cylinder with external milling tooth blades, which includes front and rear lock cylinders arranged in the lock body; the front lock cylinder is provided with a locking side column with tooth openings and a blade pin with notches Matching; there is a lock hole in the middle of the blade marble, and a protrusion that can be matched with the boss with teeth on the key is provided on the side of the lock hole; the rear lock cylinder is provided with a lock pin, and the tail of the lock body is provided with a rear lock The step of the core stop position; the sleeve is fixed on the front lock core and is sleeved on the rear lock core, and an elastic positioning bead is arranged between the sleeve and the rear lock core; the tail of the lock pin is tapered; the lock The step at the tail of the body is provided with a tapered groove matching with the tail of the lock pin. The present invention cancels the lock pin return spring in the prior art, so it can completely solve the problem that the lock cannot be used normally due to the loss of elasticity of the lock pin return spring, improves the reliability of the lock, and prolongs the service life.

Description

technical field [0001] The invention belongs to a mechanical lock, and relates to an improved lock adopting an idle-rotating lock core of an outer milling tooth blade. Background technique [0002] There is a class of locks in mechanical locks that use idling lock cylinders. The lock cylinders of these locks are composed of front and rear lock cylinders. The clutch between the front lock cylinder and the rear lock cylinder is usually realized by a clutch structure. Chinese patent applications 200710035819.1 and 200810031196.5 disclose clutch structures related to idling lock cylinders. Include the lock pin and the lock pin back-moving spring that are located in the rear lock core in these clutch structures, the clutch of front and back lock core is exactly to enter or withdraw from the front lock core by lock pin and realize. This clutch structure has found some shortcomings during the use process. Due to the frequent unlocking and closing for a long time, the lock pin retu...

AI Technical Summary

Problems solved by technology

This clutch structure has found some shortcomings during the use process. Due to the frequent unlocking and closing for a long time, the lock pin return spring will have metal fatigue and the elasticity will be weakened. In addition, the dirt formed by the wear debris and dust of the parts will further weaken its elasticity. As a result, the lock pin cannot be reset when the lock is unlocked, and the lock is always in an idling state, and the lock cannot be opened, which affects the reliability of the lock.

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