Rekeyable Lock Pin Plug Structure for Stable Pin Replacement
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Solution Overview
Problem
Existing locks require complex and difficult processes for replacing pins, and pin plugs are prone to being pushed out, leading to functional failures.
Innovation Solution
A rekeyable lock design featuring a lock casing, lock cylinder, pin set, outer casing, and pin plug with a protruded block and elastic material, allowing for stable fixation and simplified pin replacement without disassembling the lock cylinder, and incorporating a transmission rod for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the lock cylinder is pulled out to replace pins, then pin replacement can be performed, but the replacement process becomes complex and difficult
Solution Approach 1:
The lock system is divided into distinct components: lock casing, lock cylinder, pin set, outer casing, and pin plug. The pin replacement hole provides segmented access to the pin chamber, allowing pin replacement without complete disassembly of the lock cylinder, thus simplifying the replacement process while maintaining security.
Solution Approach 2:
The pin plug is extracted from the lock cylinder through the pin replacement hole, enabling access to the pin chamber for pin replacement. This extraction mechanism allows maintenance and key replacement without removing the entire lock cylinder, reducing the complexity of the replacement process.
2Reliability
If a pin plug is added to block pins, then pins can be retained in the lock cylinder, but the pin plug is easy to be pushed out causing lock failure
Solution Approach 1:
The pin plug features an asymmetric design with a protruded block that fits into a corresponding recess in the lock cylinder. This asymmetric geometry prevents the pin plug from being accidentally pushed out while still allowing intentional removal through the pin replacement hole, thus maintaining both pin retention and operational stability.
Solution Approach 2:
The pin plug is nested within the lock cylinder structure, with the protruded block fitting into a recessed area. This nesting arrangement secures the pin plug in place to prevent accidental dislodging while maintaining easy access for intentional removal during pin replacement operations.
3Ease of operation
If the lock cylinder remains in place for pin replacement, then replacement is simplified, but access to pins becomes difficult
Solution Approach 1:
The pin replacement hole serves as an intermediary access path between the external environment and the pin chamber. This hole allows pins to be accessed and replaced without removing the lock cylinder from the lock casing, simplifying the replacement process while maintaining the structural integrity and security of the lock system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Simplifies the pin replacement process, stabilizes the pin plug, and prevents detachment, ensuring reliable lock functionality.
Implementation Method 1
the pin plug is made of an elastic material
Data Source
AI summary
A lock includes a lock casing having a lock cylinder hole, a pin replacing hole and a plurality of first pin holes; a lock cylinder rotatably arranged in the lock cylinder hole and formed with a plurality of second pin holes; a pin set including a plurality of first pins respectively accommodated in the first pin holes, and a plurality of second pins respectively accommodated in the second pin holes; an outer casing having an inner wall defining an accommodation space for accommodating the lock casing; and a pin plug including a main body having a first side abutting against the lock casing and a second side abutting against the inner wall, and a protruded block protruded from the first side for closing the pin replacing hole. The second side is opposite to the first side, and a shape of the second side corresponds to the inner wall.