Cylinder Lock Keyway Segmentation for Multi-Thickness Keys
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Solution Overview
Problem
Existing cylinder locks are incompatible with both thick and thin keys, leading to unstable locking and unlocking when the wrong type of key is used, as they are designed for specific key thicknesses.
Innovation Solution
A cylinder lock design with a rotatable rotor and keyway that includes multiple cavities to accommodate keys of different thicknesses, featuring a first cavity for the base, second cavities for serrated walls, and third cavities for ribs, allowing both thick and thin keys to be used effectively by adjusting the key's shape and rib placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cylinder lock is designed for thick keys, then thick keys can be used effectively, but thin keys become loose and unstable in the lock
Solution Approach 1:
The keyway is divided into multiple cavities with different functions: a first cavity for receiving the base of the key, a second cavity for receiving the serrated wall, and a third cavity for receiving the rib. This segmentation allows each cavity to be optimized for specific key features, enabling the lock to accommodate both thick and thin keys effectively.
Solution Approach 2:
The keyway is designed with multi-functional cavities that can accommodate different key types. The first cavity accepts the base of both thick and thin keys, the second cavity engages the serrated wall for locking/unlocking operation, and the third cavity receives the rib when present. This universal design allows the same keyway to work with both thick keys (box-type portable devices) and thin keys (card-type portable devices).
2Adaptability or versatility
If a cylinder lock is designed for thin keys, then thin keys can be inserted, but thick keys cannot be inserted due to space constraints
Solution Approach 1:
The keyway is divided into multiple cavities with different functions: a first cavity for receiving the base of the key, a second cavity for receiving the serrated wall, and a third cavity for receiving the rib. This segmentation allows each cavity to be optimized for specific key features, enabling the lock to accommodate both thick and thin keys effectively.
Solution Approach 2:
The keyway design utilizes three-dimensional space efficiently by creating cavities at different depths and positions. The first cavity extends to receive the key base, the second cavity is positioned to engage the serrated wall, and the third cavity accommodates the rib protrusion. This dimensional arrangement allows the keyway to accommodate thick keys without increasing the overall footprint of the lock.
Data Source
AI summary
A cylinder lock provided with a thick key including an elongated base having two surfaces. A serrated wall extends from one surface of the base. A key groove is formed by the serrated wall. A rib is formed on the other surface of the base. The cylinder lock is further provided with a rotatable rotor including a keyway into which the thick key is inserted. A first cavity is formed in the keyway and shaped to enable insertion of the base of the thick key. A second cavity is formed in the keyway and shaped to enable insertion of the serrated wall of the thick key. A third cavity is formed in the keyway and shaped to enable insertion of the rib of the thick key. The keyway enables insertion of a thin key in lieu of the thick key.