Anti-Picking Lock Set Using Ring-Groove Pin Interference
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Solution Overview
Problem
Conventional locks are vulnerable to picking, allowing unauthorized access due to the ease with which upper pins can be manipulated and rotated without the correct key, leading to increased theft risk.
Innovation Solution
The anti-picking lock set incorporates a lock sleeve with ring protrusions in upper slots and ring grooves on upper pins, creating an illusion of complete pin insertion during picking, thereby making it difficult to determine the exact position of upper pins and increasing the difficulty of unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional cylindrical upper pins are used in the lock set, then the lock set is easy to be picked by locksmiths or thieves, but the lock set lacks anti-picking security
Solution Approach 1:
The upper pin structure is modified with a ring groove at a specific location, and the upper slot is designed with a corresponding ring protrusion. This local structural modification creates a specific interaction between the pin and slot that prevents the pin from being fully inserted during picking attempts, while maintaining the overall simplicity of the lock mechanism.
Solution Approach 2:
The ring groove and ring protrusion act as intermediary elements between the upper pin and upper slot. These features create a mechanical interference that prevents the pin from reaching its final position during picking, effectively blocking the unlocking process without requiring complex additional components.
2Measurement precision
If the upper pin is pushed into the upper slot during picking, then the pin appears to be in the correct position, but the pin actually stops short due to the ring groove and ring protrusion interaction
Solution Approach 1:
The ring groove and ring protrusion create a beneficial mechanical interference that converts the picker's insertion force into a stopping mechanism. The picker perceives the pin as being in the correct position (which would normally indicate successful unlocking), but the ring groove-protrusion interaction prevents actual insertion, effectively using the picker's own action against them.
3Reliability
If multiple upper pins are used in the lock set, then the security against picking is enhanced, but the complexity of the lock mechanism increases
Solution Approach 1:
The anti-picking feature is segmented into discrete elements: the ring groove on each upper pin and the corresponding ring protrusion in the upper slot. This segmentation allows the feature to be implemented on individual pins without requiring a complete redesign of the entire lock mechanism, maintaining simplicity while enhancing security.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design prevents unauthorized unlocking by creating a tilting effect when attempting to pick the pins, requiring multiple attempts and increasing the time needed to unlock, thus enhancing security against picking.
Implementation Method 1
a plurality of upper pins respectively disposed between the corresponding plurality of lower pins and the corresponding plurality of elastic members and being pushed against by the plurality of elastic members
Data Source
AI summary
An anti-picking lock set is provided and includes a lock sleeve, a lock core inserted in the lock sleeve, a plurality of elastic members accommodated in a plurality of upper slots of the lock sleeve, a plurality of lower pins accommodated in a plurality of lower slots of the lock core, and a plurality of upper pins disposed between the elastic members and the lower pins. When the lock set is unlocked by picking pins, a twisting force is first exerted on the lock core, and then the upper pins are pushed toward the upper slots. During the pushing process, since a ring groove of the upper pin moves to and is engaged with a side of a ring protrusion of the lock sleeve, an illusion of the upper pin being completely pushed into the upper slot is generated, which makes it difficult to complete the unlocking.