Primary-Secondary Row Sheet Lock Burglary Resistance
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Solution Overview
Problem
Existing locks fail to provide sufficient burglary resistance to meet the increasing demands for high-end security as they lack advanced mechanisms to prevent unauthorized access and drilling attempts.
Innovation Solution
A burglarproof primary-secondary row sheet lock design featuring a lock body with an outer cylinder, plug, closure plates, sheet return springs, and a key with specific notch and cut configurations that align only with a matched key, allowing the latch to slide out of the trough and enable unlocking, while preventing rotation with non-matched keys, and incorporating drilling-resistant features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional lock mechanisms are used, then the structure is simple and easy to manufacture, but the burglary resistance is insufficient
Solution Approach 1:
The lock mechanism is divided into multiple independent row sheets (primary and secondary) with distinct functions. Each row sheet contains multiple notches that must align simultaneously with the key, creating a segmented security system where each segment contributes to the overall burglary resistance without requiring complete redesign of the entire lock structure.
Solution Approach 2:
The patent implements a nested structure where secondary row sheets are positioned within the plug, and primary row sheets are positioned within the outer cylinder. The latch mechanism nests within the latch trough, creating multiple layers of security that must all be simultaneously compromised for the lock to fail, thereby enhancing burglary resistance without proportionally increasing external complexity.
2Reliability
If more key combinations are provided, then security performance is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The patent transitions from traditional single-dimensional key cuts to a multi-dimensional system with primary and secondary row sheets, each with multiple notches positioned at different depths and locations. This dimensional expansion creates tens of millions of possible key combinations while maintaining a relatively compact lock structure, as the complexity is distributed across multiple spatial dimensions rather than requiring a single complex cutting pattern.
Solution Approach 2:
The row sheets are pre-configured with specific notch patterns during manufacturing, creating a predetermined security landscape. The key must precisely match this pre-established configuration, allowing the system to provide high security performance without requiring complex real-time detection or measurement mechanisms, as the verification is simply whether the key notches align with the pre-set row sheet notches.
3Reliability
If drilling resistant features are added, then burglary resistance is enhanced, but the device complexity increases
Solution Approach 1:
The drilling resistant plate is integrated directly into the lock body structure, merging the drilling protection function with the existing cylindrical chamber design. This combination allows the lock to provide enhanced drilling resistance without adding separate, complex protective mechanisms, as the drilling resistant features are incorporated into the fundamental lock body architecture rather than added as external attachments.
Data Source
AI summary
A burglarproof primary-secondary row sheet lock includes an outer cylinder in which a cylindrical chamber that receives the insertion of a plug and a latch trough are formed. The plug includes row sheet receiving slots, a latch opening, a key way, and a lock bolt. The secondary row sheets each have a side edge in which a first latch notch is formed. The primary row sheets are each formed with a secondary row sheet channel and a second latch notch. The primary row sheets are set in the row sheet receiving slots and the secondary row sheets are received in the secondary row sheet channels. The closure plates cover the row sheet receiving slots with sheet return springs arranged between the closure plates and the primary and secondary row sheets. The latch is received in the latch opening and latch return springs are arranged between the plug and the latch.