Lock

Abstract

The invention relates to a lock, in particular to a secondary key lock. The lock comprises a lock body, a lock core, inner cylinders with notches, a code distinguishing chip and a lock core pin or clutch bolt. The improvement of the lock is that: the code distinguishing chip is improved into an axial normally-open code distinguishing chip. A driving device and a lock opening control member are respectively arranged in the lock, wherein the driving device is used for driving the code distinguishing chip, and the lock opening control member is controlled by the code distinguishing chip; the code distinguishing action of the code distinguishing chip is indirectly driven by the driving device through a spring; the driving device is a torsion driving device or a key insertion driving device comprising a line-tooth key; and the lock opening control member is a rigid lock core pin or / and clutch bolt. Further improvement of the lock is that: one or more rows of inner cylinders are radially arranged. The lock consisting of the key insertion driving device, the clutch bolt and a positioning steel ball can be applied to a lock set requiring accurate positioning.

Description

technical field [0001] The present invention relates to a lock head, more precisely to a secondary key lock head (the "secondary key" will be explained in the background art below). Background technique [0002] The structure and working principle of the common tumbler lock that is widely used at present is as follows: the lock cylinder is provided with a rotatable lock cylinder, and a row of pinholes passing through the lock cylinder and the lock body. In each pinhole, Both are equipped with an inner pin (referring to the pin remaining in the lock cylinder after the lock cylinder is turned) and an outer pin (refers to the pin remaining in the lock body after the lock cylinder is turned) and can give the pin an inward (to the lock cylinder) In the keyhole) the pressure pin spring. Usually the lock cylinder is pinned by the pin in the pin hole in the lock body, and the lock cylinder cannot rotate. If the inner and outer pins are regarded as a cylindrical lock cylinder pin i...

AI Technical Summary

Problems solved by technology

The disadvantage is that the steel ball and code identification piece can only move radially in the lock cylinder. Considering the force of the code identification piece, the steel ball has to be set in the marble area, which makes the layout of the parts extremely cramped.

The deficiency of idling lock is: at first, the task of pushing the identification chip (idling lock is called auxiliary marble) away from the password gap (idling lock is called V-shaped ring groove, V-shaped notch) is to rely on the password on the inner slingshot. The notch is completed using the principle of a slope

This will also affect the reliability of the lock

In addition, in order to accommodate the code identification chip, this patent also has an open through long slot on one or both sides of the lock cylinder, resulting in damage to the overall strength of the lock cylinder

[0006] The difference between the code identification chips of the above two patents is that the code identification and return of the code identification chips of the atomic lock move radially, and the code identification chips are operated by the return position except when the lock is unlocked. The spring directly pushes away from the inner pin, so that the return spring away from the inner pin is in a relatively relaxed state most of the time; Except for the time, the rest of the time is pressed on the inner pin. The spring that presses the code disc to the inner pin is in a compressed state most of the time, and the spring is in a compressed state most of the time. For the service life of the lock head is unfavorable

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