Cylinder Lock Bridge Assembly With Fixed-Pin Rotational Alignment
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Solution Overview
Problem
The assembly of existing cylinder locks requires dexterity and experience due to unstable component alignment during the insertion of locking pins, making it difficult for inexperienced users.
Innovation Solution
The cylinder lock design features fixed locking pins and a bridge with flattened sides, allowing components to be easily aligned and secured through rotational positioning, simplifying assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If removable locking pins are used in existing cylinder locks, then the lock can be disassembled and reassembled, but the assembly process requires dexterity and experience due to unstable component alignment
Solution Approach 1:
The bridge is provided with a flattened side that extends from the free end to the locking pin recess, creating an asymmetric geometry. This asymmetric shape guides the bridge during insertion, ensuring proper rotational positioning relative to the cylinder housing and locking pin, thereby eliminating the need for dexterity or experience during assembly.
Solution Approach 2:
The locking pin is fixedly received in the locking pin bore before the bridge is inserted. This preliminary positioning of the locking pin creates a reference feature that the flattened side of the bridge aligns with during insertion, automatically establishing the correct rotational position and stable alignment without requiring manual adjustment by the assembler.
2Reliability
If locking pins are inserted during assembly, then components can be connected, but unstable alignment during insertion requires great dexterity
Solution Approach 1:
The flattened side on the bridge creates an asymmetric insertion path that naturally guides the bridge into the correct rotational position. As the flattened side engages with the cylindrical recess, it prevents rotation and ensures the locking pin recess aligns precisely with the locking pin, providing stable alignment during the entire insertion process without requiring assembler skill.
Solution Approach 2:
The flattened side acts as an intermediary guiding feature between the bridge and the cylinder housing. During insertion, the flattened side interfaces with the cylindrical recess to establish proper orientation, mediating the alignment between the bridge's locking pin recess and the fixed locking pin, thereby ensuring reliable connection with minimal assembler intervention.
3Adaptability or versatility
If the bridge is rotatable during insertion, then alignment can be adjusted, but this requires great dexterity and experience
Solution Approach 1:
The flattened side creates an asymmetric geometry that provides controlled adaptability. The bridge can be inserted at any rotational position, but the flattened side's interaction with the cylindrical recess automatically guides it to the correct orientation, maintaining alignment flexibility while eliminating the need for assembler skill to achieve proper positioning.
Solution Approach 2:
The asymmetric flattened side enables the bridge to self-align during insertion. As the bridge is pushed into the cylindrical recess, the flattened side's geometry causes it to naturally rotate or position itself so that the locking pin recess aligns with the fixed locking pin, making the alignment process self-serviceing and independent of assembler dexterity or experience.
Data Source
AI summary
A cylinder lock that can be simply assembled and disassembled has a cylinder housing, a bridge and a cam. In the cylinder housing, a first locking pin is fixedly received in a locking pin bore. The locking pin passes a cylindrical recess in the cylinder housing transversely. A first cylindrical end of the bridge is provided with a locking pin recess and with a flattened side which extends at least from a free end, remote from a central part of the bridge, of the first cylindrical end of the bridge up to and including a first locking pin recess. The bridge can be simply connected with the cylinder housing by inserting the first cylindrical end of the bridge into the cylindrical recess in the cylinder housing and by thereupon rotating the bridge through an angle, such that the locking pin extends in the locking pin recess in the bridge. After that, with a locking bolt the thus assembled whole can be locked.