Combination Padlock Annular Clutch Re-coding
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Solution Overview
Problem
Existing combination padlocks are not convenient for re-coding, as the process often requires additional adjustments beyond the locked and unlocked positions, and may be vulnerable to picking techniques.
Innovation Solution
A combination padlock design featuring an annular clutch made of yieldable plastics or rubber material that deforms to allow angular movement of dials relative to locking configurations, enabling re-coding in the open position and incorporating radially extending locking projections with non-uniform spacings to thwart picking attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional combination padlock mechanisms are used, then security is maintained, but re-coding becomes inconvenient and complex
Solution Approach 1:
The clutch member is designed to dynamically change its state between locked and unlocked positions. When the operating member is rotated to the unlocked position, the clutch member shifts from a locked state (where it prevents dial rotation) to an unlocked state (where it allows independent dial rotation for re-coding), enabling convenient code changes without complex additional mechanisms
Solution Approach 2:
The clutch member serves multiple functions: it acts as a locking mechanism during normal operation, transitions to an unlocking mechanism when the operating member is rotated, and enables independent dial rotation for re-coding. This multi-functionality eliminates the need for separate adjustment mechanisms, simplifying the overall device while maintaining security
2Reliability
If standard radial locking configurations are used, then manufacturing is simple, but security against picking is reduced
Solution Approach 1:
The locking configurations on the operating member are designed with non-uniform angular spacing around the circumference, creating an asymmetric pattern. This asymmetry prevents picking techniques that rely on uniform spacing, as each locking configuration engages with the clutch member at different angular positions, making it difficult for pickers to identify and manipulate the correct position
Solution Approach 2:
Different locking configurations are positioned at specific non-uniform angular locations rather than being evenly distributed. This local variation in positioning creates unique engagement points for each locking configuration with the clutch member, enhancing security against picking while remaining compatible with standard manufacturing processes
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
Facilitates easy re-coding without additional adjustment mechanisms and enhances security by making known picking techniques difficult, while maintaining ease of manufacture and aesthetic appeal.
Implementation Method 1
an annular clutch provided in the form of a yieldable member of plastics or rubber material which deforms so as to allow re-coding the dial
Data Source
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AI summary
An improved locking means, such as a combination padlock, is disclosed in which the re-coding thereof can be carried out in a convenient and/or efficient manner. A locking means comprising a body including a plurality of dials (15,16,17,18; 62) disposed to surround a lock member (35; 60) in an axially spaced relationship therealong is disclosed. Relative axial sliding movement is possible between the dials (15,16,17,18; 62) and the lock member (35; 60) between a locked position and a release position and the lock member (35; 60) has at least one generally radially extending exterior locking configuration (46; 61). This locking configuration (46; 61) is received in a corresponding first location at one side of a dial (15,16,17,18; 62) in said locked position, and in a corresponding second location within a dial (15,16,17,18; 62) in said release position, each dial (15, 16, 17, 18 ; 62), in said release position, being angularly movable relative to said at least one locking configuration (46; 61) so as to allow re-coding the dial.