Cam Mechanism and Turning Ring Forced Reset Device of Fingerprint Lock

Abstract

The invention discloses a cam mechanism and rotating ring forced resetting device for a fingerprint lock and relates to the field of anti-theft locks. According to the cam mechanism and rotating ring forced resetting device for the fingerprint lock, the main improvement is that the specific structure and the assembling mode of an overload protection device of the cam mechanism are changed; a collision bead sliding way, a collision bead spring and the like are radially assembled onto a cam shaft which is amplified locally; meanwhile, a collision bead large in diameter is adopted, on one hand, it is guaranteed that the idle function of the cam mechanism is stable and reliable, and on the other hand, space can be saved; the rotating ring forced resetting device which is simple and easy to implement can be arranged conveniently so that potential dangers can be eliminated; in addition, the resetting device is free of wear in routine operation and low in production cost; and meanwhile, axial dimensions and radial dimensions of main components of a double clutch can be increased so that reliability of the double clutch and safety of the lock can be improved.

Description

technical field [0001] The invention relates to the field of anti-theft locks, in particular to a cam mechanism and a rotating ring forced reset device of a fingerprint lock. Background technique [0002] The invention patent of "Cylinder fixed cross mechanical anti-theft lock" (ZL201410020215.X) in the prior art has special structural and performance advantages: technology cannot be opened, force-opening tools cannot be destroyed, large number of keys, and keys can be used digitally Code representation and preparation, the marbles in the lock cylinder are all steel balls, the key can only be inserted or withdrawn, it does not rotate and is easy to insert and pull out, use the rotating handle to unlock or lock, the handle has an overload protection device to idle, unlock or lock operation Simple and easy and more. Because this product is not only used independently for anti-theft doors, safes, vaults, etc., it can also be used in conjunction with fingerprint recognition sys...

AI Technical Summary

Problems solved by technology

If additional relevant components are added on the basis of the two patented technologies to realize the forced reset function of the rotating ring, there are two difficulties involved: one is that there is no space or position for setting the third flange on the driven ring of the cam mechanism, That is to say, it is impossible to complete the forced reset function of the rotating ring by using it with the reset column on the outer rotating ring; the second is that the parts that can be provided with an inclined push surface and matched with the reset lever or the push edge boss only do the unlocking action, not locking Action, so this part cannot be used to realize the forced reset function of the rotating ring

[0007] In addition, in the cam mechanism of the two patent applications "Cam mechanism with fixed lock core and fingerprint lock" and "Cam mechanism of a fingerprint lock", the active plate, touch bead, The driven plate, thrust spring or disc spring are still arranged in the axial direction, occupying more space in the axial direction, forcing the diameter of the bead to be reduced from 8 mm to 6 mm because of the small space

The unfavorable factors of the bead becoming smaller are: the processing accuracy of the parts in contact with the bead is very high, and there are problems in reliability: if the machining error is large, it will either be stuck and cannot idle, or the idling resistance torque is too small, and the lock can be unlocked and locked normally. The lock may also appear idling and affect the normal use; the unfavorable factors of setting the axially moving driven piece are: the radial size of the driven piece is large, the axial displacement is very short, and the matching clearance with the groove inside the driven ring must be If it is large enough, otherwise the driven plate is easy to self-lock with the groove when moving in the axial direction, and the active plate cannot slip, resulting in the consequence that the camshaft cannot idle; use a centered thrust spring or disc spring instead of multiple The unfavorable factors of the first bead spring are: it occupies too much space in the axial center area, and the related parts of the main clutch or auxiliary clutch cannot extend to the axial direction in terms of space design, resulting in the axial and radial dimensions of the related parts being very large. Limited, the reliability of dual clutch disengagement and closure, and the safety of locks are also affected

[0008] To sum up, the related technologies of the above-mentioned two invention patent applications of "fixed cross mechanical anti-theft lock with lock core matched with fingerprint lock" and "cam mechanism of a fingerprint lock" need to be redesigned, not only to solve the problem of forced reset of the rotating ring, It is also necessary to solve the reliability of the idling function of the cam mechanism, the reliability of the double clutch, and the safety of the lock.

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