Heavy Duty Lock Case Anti-Pick Mechanism
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Solution Overview
Problem
Existing heavy duty lock cases with anti-theft latches are inconvenient to use because the anti-theft latch must be manually moved to a non-anti-theft position to open the door, even when the door is closed and the latch is picked.
Innovation Solution
The heavy duty lock case incorporates an anti-pick latch and an anti-pick member that automatically pivot between positions based on the door's state, allowing the latch to move to the unlatching position when the door is closed and preventing unauthorized opening when the door is closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the anti-theft latch is added to prevent unauthorized door opening, then the security is improved, but the ease of operation deteriorates because the anti-theft latch must be manually moved to a non-anti-theft position to open the door
Solution Approach 1:
The anti-pick member is preliminarily positioned by the anti-pick latch based on the door's closed or open state. When the door is closed, the anti-pick latch moves the anti-pick member to the anti-pick position to prevent picking. When the door is open, the anti-pick latch moves the anti-pick member to the non-anti-pick position automatically, so no manual intervention is needed to open the door.
Solution Approach 2:
The anti-pick latch automatically adjusts the anti-pick member's position based on the door state without requiring user intervention. The system self-regulates by detecting whether the door is closed or open and相应地 positioning the anti-pick member, thereby providing both security and convenience.
2Reliability
If the anti-pick member is always in the anti-pick position to prevent picking, then the security is improved, but the ease of operation deteriorates because the door cannot be opened even when not closed
Solution Approach 1:
The anti-pick member's position is made dynamic rather than fixed. It automatically switches between the anti-pick position and the non-anti-pick position based on the door state. The anti-pick latch acts as a dynamic control mechanism that responds to door position changes, ensuring security when closed and operability when open.
Solution Approach 2:
The system incorporates feedback through the anti-pick latch that detects the door state (closed or open) and相应地 adjusts the anti-pick member's position. This feedback mechanism ensures the anti-pick member is in the correct position for the current door state, providing both security and operational convenience.
Data Source
AI summary
A heavy duty lock case is mounted on a door and includes a latch coupled with a door frame for retaining the door in a closed position. An anti-theft latch can be operated to engage with the door frame. The latch cooperates with an anti-pick member to avoid the latch from being picked to disengage from the door frame when the door is in the closed position. When normally operated, an inner operating device or an outer operating device can be operated to disengage the latch from the door frame while disengaging the anti-theft latch from the door frame, permitting easy, convenient opening of the door.