Key Cylinder Lock Structure for Easier Removal With Fewer Parts
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Solution Overview
Problem
The existing lock device has a large number of components, making it difficult to remove the key cylinder, as it requires the upper member to be detached from the lower member before the key cylinder can be replaced.
Innovation Solution
A lock device design with a key cylinder accommodated in the operation member, where the key plate is engaged with the opening portion on the rear side of the cylinder accommodation part, allowing for removal via a release tool inserted through a base member opening, reducing the need for additional components and simplifying the removal process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the key cylinder is accommodated in a separate upper member that must be detached from the lower member, then the key cylinder can be removed, but the number of components increases and the removal process becomes complex
Solution Approach 1:
The patent merges the key cylinder accommodation function directly into the operation member, eliminating the need for a separate upper member. The key cylinder is now integrated within the operation member structure itself, allowing direct access and removal through the operation member without requiring detachment of additional components.
Solution Approach 2:
The patent extracts the key cylinder from a separate housing structure and integrates it directly into the operation member. This extraction simplifies the overall structure by removing the upper member while maintaining the key cylinder's functionality and accessibility for removal purposes.
2Device complexity
If the key cylinder is integrated into the operation member, then the number of components is reduced, but access for removal becomes more difficult
Solution Approach 1:
The operation member is segmented into functional zones, with a specifically designed opening or access point that allows the key cylinder to be removed independently. This segmentation enables the key cylinder to be accessed and removed without disassembling the entire operation member, maintaining both integration and accessibility.
3Reliability
If a separate upper member with connecting claw is used to hold the key cylinder, then the key cylinder is secured, but the removal process requires multiple steps and additional components
Solution Approach 1:
The operation member incorporates self-contained retention and release mechanisms for the key cylinder, eliminating the need for separate upper members with connecting claws. The design allows the key cylinder to be retained securely during normal operation but enables straightforward removal through the integrated structure's own features, such as push buttons or release levers built into the operation member.
Data Source
AI summary
Provided is a lock device for an opening/closing body, the device having a reduced number of parts and enabling a key cylinder to be removed with greater ease. The lock device comprises a lock part, a lock member which is operated via a manipulation member, a base member, and a key cylinder, wherein: the manipulation member comprises a cylinder housing part; the base member comprises a cylinder arrangement space in which the cylinder housing part is arranged, a wall part located at the tip side of the manipulation member, and an opening formed in the wall part; the key cylinder comprises a key plate; the key plate comprises a pressing surface; and the pressing surface is exposed inside the cylinder arrangement space and disposed further to the base end part side of the manipulation member than the edge part of the opening in the wall part.