Locking Device Guide Pin Mechanism Anti-Picking
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Solution Overview
Problem
Existing locking devices for sliding door or window openings are vulnerable to picking and require additional design features to prevent unauthorized access, such as hollow profiles, which complicate manufacturing and user operation.
Innovation Solution
A locking device featuring a guide pin that moves between a rest and safety position, blocking the rod's translation when in the safety position, requiring the operating member to be actuated to disengage, thus preventing unauthorized movement without additional user maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional locking devices with hooks and latches are used, then the locking function is achieved, but the device is vulnerable to picking and requires hollow profiles to prevent unauthorized access
Solution Approach 1:
A guide pin is introduced as an intermediary element between the operating rod and the external environment. The guide pin translates the rotational motion of the operating member into linear motion of the rod, while its blocked position prevents direct access to the rod's movement, thereby eliminating the need for hollow profiles and providing security against picking.
Solution Approach 2:
The locking mechanism is segmented into distinct functional components: the operating member, the guide pin, the rod with hooks, and the strikers. This segmentation allows the guide pin to independently control the rod's movement, providing security without requiring complex hollow profile structures.
2Reliability
If hollow profiled shapes are used to prevent picking, then security is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The guide pin serves as a mediator that provides security functionality without requiring hollow profiled shapes. By controlling the rod's movement through the guide pin's blocked position, the invention achieves security with simple, easily manufacturable components.
Solution Approach 2:
The guide pin is a simple, inexpensive component that can be easily manufactured and replaced if needed. Its simplicity allows for cost-effective production while providing the required security function, avoiding the need for expensive hollow profiled shapes.
3Reliability
If the guide pin is blocked in both directions in the safety position, then the rod is locked in translation and security is enhanced, but the mechanism requires additional components
Solution Approach 1:
The guide pin performs multiple functions: it translates rotational motion to linear motion during operation, and it blocks the rod's movement in both directions when in its blocked position to provide security. This multi-functionality reduces the need for additional components while enhancing locking reliability.
Solution Approach 2:
The guide pin combines the motion transmission function and the security blocking function into a single component. By merging these functions, the invention achieves enhanced locking reliability without significantly increasing the number of components.
4Reliability
If the guide pin blocks the rod in both directions, then unauthorized movement is prevented, but the operating mechanism must be actuated to disengage
Solution Approach 1:
The guide pin acts as an intermediary that must be disengaged through the proper operating mechanism before the rod can move. This ensures that unauthorized access is prevented while maintaining ease of operation for authorized users who simply need to actuate the operating member.
Data Source
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AI summary
The mechanism has a force transmission mechanism comprising a guide pin. The guide pin is adapted to move between one extreme position corresponding to a passive position of a rod (12), and another extreme position corresponding to a safe locking position of the rod. The rod and the guide pin are locked in direction of movement of the rod. A set of hooks (10) is fixed at the rod. The transmission mechanism is arranged with a cam.