Locking Device Blade Blocks Key Slot View
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Solution Overview
Problem
Conventional locking devices have insufficient burglarproof effects due to the exposure of the key slot, allowing the internal structure to be viewed and enabling unauthorized unlocking.
Innovation Solution
A locking device design featuring a blade and attachment where the blade is slidably received in the key slot, with a guiding piece and blocker that blocks the key slot when the blade is inserted, preventing viewing of the internal structure and unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the key slot is exposed and accessible, then the ease of operation for legitimate key insertion is improved, but the burglarproof effect deteriorates due to visibility of internal structure and unauthorized access
Solution Approach 1:
The blade serves as an intermediary component that blocks the key slot when not in use, preventing direct viewing of the lockpin unit while still allowing legitimate key insertion. The blade is positioned between the external environment and the internal lock mechanism, acting as a mediator that controls access and visibility.
Solution Approach 2:
The blade is designed to be movable, transitioning between a blocking position (when removed) and a non-blocking position (when inserted with a legitimate key). This dynamic behavior allows the system to adapt between security mode and operational mode, resolving the contradiction between security and ease of use.
2Reliability
If the key slot is blocked by the blade, then the burglarproof effect is improved by preventing viewing of internal structure, but the ease of operation may deteriorate due to additional components
Solution Approach 1:
The blade performs multiple functions: it blocks the key slot to prevent unauthorized access and viewing, guides the legitimate key during insertion, and transmits operational force to the lockpin unit. By consolidating these functions into a single component, the design avoids adding excessive complexity while achieving enhanced security.
Solution Approach 2:
The guiding piece is integrated with the blade structure, combining the blocking function and the guiding function into a unified component. This merging reduces the number of separate parts and simplifies the overall structure while maintaining the burglarproof effect and operational ease.
3Ease of operation
If the blade is slidably received in the key slot with guiding piece, then the smooth operation is improved, but the device complexity increases due to additional guiding mechanisms
Solution Approach 1:
The guiding piece provides localized guidance only at the critical interface between the blade and key slot, rather than requiring comprehensive guiding mechanisms throughout the entire assembly. This targeted approach ensures smooth operation where needed while minimizing overall structural complexity.
Solution Approach 2:
The blade's own structure, including its shape and the integrated guiding piece, provides the guidance function without requiring external guiding mechanisms. The blade essentially guides itself through the key slot using its geometric features, reducing the need for additional complex guiding components.
Data Source
AI summary
A locking device includes a lock, a blade and an attachment. The lock includes a key slot and a lockpin unit. The key slot extends from a key insertion face to an interior of the lock. The lock includes an inner wall. The lockpin unit is in the lock and extends into the key slot from the inner wall of the lock. The blade includes a guiding end, a control end, a receiving portion located between the guiding and control ends, and a guiding piece. The guiding piece is arranged at the guiding end. The guiding end is located in the key slot, and the control end is located outside the key slot. The attachment is detachably attached to the receiving portion. The blade is slid to drive the attachment to be in or off contact with the lockpin unit.