Locking Cartridge Segmentation Prevents Component Ejection
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Solution Overview
Problem
Traditional interchangeable core lock cylinders face difficulties in pinning due to complex part tolerances and are prone to 'exploding' when the plug is removed, leading to potential damage or loss of components.
Innovation Solution
A modular locking cartridge design featuring a housing with rotatably mounted plates, a blocking member, and a movable member that responds to key cuts to control the rotation and blocking positions, preventing the plates from moving or rotating when the proper key is not inserted, thus maintaining component placement and assembly integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional interchangeable core assemblies are used, then the lock cylinder can function with complex part tolerances and pinning, but the assembly tends to explode when the plug is removed from the shell, causing components to be ejected and lost
Solution Approach 1:
The locking cartridge is divided into separate functional segments: a housing, first and second plates rotatably mounted within the housing, a blocking member, and a movable member. This segmentation allows each component to be independently controlled and contained, preventing the explosive ejection of internal components when the plug is removed from the shell.
Solution Approach 2:
The cam interface is designed to preliminarily constrain the first plate's movement toward the second plate during rotation, while the blocking member is positioned to prevent premature engagement. This preliminary anti-action ensures that components remain contained and properly positioned throughout the operation, preventing the harmful explosion effect when the plug is removed.
2Reliability
If complex part tolerances and pinning are implemented in traditional lock cylinders, then the lock can function properly, but the pinning process becomes difficult and laborious
Solution Approach 1:
The locking mechanism is segmented into modular components (housing, plates, blocking member, movable member) that can be assembled in a standardized sequence. This segmentation simplifies the pinning process by eliminating the need for complex tolerance adjustments and difficult pinning operations, while maintaining reliable lock function through the controlled interaction of segmented parts.
Solution Approach 2:
The cam interface acts as an intermediary mechanism that mediates between the rotating plates and the blocking member. This intermediary controls the sequence of operations and ensures proper engagement without requiring complex part tolerances or difficult pinning, thereby simplifying manufacture while maintaining reliability.
3Ease of operation
If the blocking member is designed to move among blocking and unblocking positions in response to key engagement, then rotation of the first plate can be controlled, but the mechanism becomes more complex
Solution Approach 1:
The blocking member's movement between blocking and unblocking positions is merged with the rotation of the first plate through the cam interface. As the first plate rotates, the cam interface automatically urges the blocking member into or out of the blocking position, eliminating the need for separate control mechanisms and reducing overall device complexity while maintaining ease of operation.
Solution Approach 2:
The cam interface is designed to preliminarily position the blocking member in the blocking position before rotation begins. As the key rotates the first plate, the cam interface automatically transitions the blocking member between positions in the correct sequence, providing automatic rotation control without adding complex external control mechanisms.
Data Source
AI summary
A locking cartridge including a housing, first and second plates rotatably mounted in the housing, a blocking member, and a movable member. The cartridge also includes a cam interface which urges the first plate toward the second plate when the plates are rotated. The blocking member is configured to move among a blocking position and an unblocking position in response to engagement with a first cut on a key. When in the blocking position, the blocking member blocks the first plate from moving toward the second plate. With the second plate blocked from moving toward the first plate, the cam interface prevents rotation of the first plate. The movable member is configured to move among a first position and a second position in response to engagement with a second cut on the key. In certain embodiments, the movable member may be a control pin or a second blocking member.