Bullet lock core with double locking device and side unlocking hole

Abstract

The present invention provides a double locking side column cylinder lock core, including lock body, lock core, ball and ball reset spring. It is characterized by that on the inside of circular hole of the lock body a locking position groove is cut, and on the lock core the side column groove and ball hole are cut, inside of the side column groove is communicated with side face of ball hole and roughly perpendicular to the ball hole, the outside of said column groove is correspondent to the locking position groove of inside of circular hole of the lock body. On every ball a recessed groove is set, and in the side column groove a locking side column is set, and between the described locking side column and lock core a spring capable of making the locking side column slided into inside of circular hole of lock body is set. Said invented locking mechanism adopts face-to-face contact mode, so that it can greatly raise its locking reliability and burglary-resisting function.

Description

Technical field: [0001] The invention relates to a lock, in particular to a cylinder of a tumbler lock. Background technique: [0002] At present, in order to improve the anti-theft performance and locking firmness of the tumbler lock cylinder, various improvements are made to the common tumbler lock cylinder, such as the application number is 99115581.5, the announcement number is CN1117911C, and the title of the invention is "A kind of anti-theft tumbler lock head and The invention patent of "Key". The pin lock cylinder of this patent includes a lock body, a lock cylinder, a pin, and a pin return spring. The inner side of the side column groove communicates with the side of the pin hole and is roughly perpendicular to the pin hole. The outer side of the side column groove can correspond to the locking groove inside the round hole of the lock body. There is a circle of V-shaped grooves on each pin. There is a locking side column in the column groove. The inner side of the ...

AI Technical Summary

Problems solved by technology

[0002] At present, in order to improve the anti-theft performance and locking firmness of the tumbler lock cylinder, various improvements are made to the common tumbler lock cylinder, such as the application number is 99115581.5, the announcement number is CN1117911C, and the title of the invention is "A kind of anti-theft tumbler lock head and The invention patent of "Key". The pin lock cylinder of this patent includes a lock body, a lock cylinder, a pin, and a pin return spring. The inner side of the side column groove communicates with the side of the pin hole and is roughly perpendicular to the pin hole. The outer side of the side column groove can correspond to the locking groove inside the round hole of the lock body. There is a circle of V-shaped grooves on each pin. There is a locking side column in the column groove. The inner side of the locking side column is V-shaped, which can be matched with the V-shaped groove on the pin. The outer side of the locking side column is square, which can be matched with the square groove inside the round hole of the lock body. Coordinated, a step is provided on the locking side column, and a pressure plate is fixed on the outside of the side column groove corresponding to the step, and a locking side column return spring is arranged between the pressing plate and the step of the locking side column, and the lock hole on the lock core The edge of the lock cylinder is semi-closed, and the hole tooth surface is perpendicular to the pin group. Since the invention adopts the locking side column as the locking device for controlling the rotation of the lock core, the pins cannot be positioned at the same time with an unlocking tool without a matching key. And make the V-shaped grooves on it all overlap, so the lock cannot be opened, so the anti-theft performance is better than the ordinary pin lock, but the return spring of the locking side column presses the locking side column against the pin, so that the locking side column is always in contact with the pin. The elastic contact of the pins makes it easy for the thief to find the feeling when unlocking the lock with detection means, which reduces the anti-theft performance of the lock cylinder

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