Watch Clasp Key Lock Mechanism
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Solution Overview
Problem
Classic folding watch clasps can be easily unlocked by malicious individuals, posing a risk of theft, as they require user intervention to secure the buckle.
Innovation Solution
A deployant buckle with a unique locking system that can only be unlocked using a removable external key, featuring a sliding drawer with a locking pin and a spring-loaded mechanism, ensuring the buckle remains secure without visible anti-theft devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional folding clasp with push buttons or flap is used, then the buckle can be easily unlocked by users, but it can also be easily unlocked by malicious individuals, compromising security
Solution Approach 1:
A key is introduced as an intermediary element between the user and the locking mechanism. The key operates a cam mechanism that rotates to move the locking arm from the locked to unlocked position. This intermediary device allows legitimate users to unlock the clasp while preventing unauthorized access by pickpockets who cannot manipulate the key-cam system.
Solution Approach 2:
The conventional push-button or flap-based mechanical release system is replaced with a key-operated cam mechanism. The key rotates a cam that translates rotational motion into linear motion of the locking arm, providing a more secure mechanical system that resists unauthorized manipulation while maintaining controlled access for legitimate users.
2Reliability
If a key-operated locking system is implemented, then security against pickpocketing is improved, but the device complexity increases
Solution Approach 1:
The key-operated cam mechanism is integrated directly into the existing folding clasp structure. The cam is mounted on the locking arm assembly, and the key hole is positioned within the clasp body. This merging of the key-cam mechanism with the folding clasp components minimizes additional complexity while achieving enhanced security functionality.
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
Prevents unauthorized opening of the watch by requiring a unique external key for unlocking, enhancing security against pickpocketing and theft while allowing the wearer to leave the key behind.
Implementation Method 1
a return spring arranged to return the drawer to its initial position
Implementation Method 2
a locking pin arranged to engage with the locking recess when the buckle is in the folded position
Data Source
Figure 1~2
Figure 3
Figure 4~5b
AI summary
The invention provides a folding clasp (1) comprising a lower arm (10) and an upper arm (12) hinged relative to each other, and a return loop (20) hinged on the upper arm (12). The folding clasp (1) can assume a folded position in which the upper arm is folded onto the lower arm and the return loop is folded onto the upper arm, in a longitudinal direction of the folding clasp (1). A locking system (30) is partially housed between the return loop (20) and the upper arm (12) to lock the folding clasp (1) in the folded position. The locking system includes a spring-loaded pin lock (40) and can be unlocked by means of a removable key (90) whose pattern is associated with the lock (40).