Door Handle Key-Cylinder Cover Layout for Compact Assemblies
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Solution Overview
Problem
Existing door handle devices are not designed for miniaturization, particularly in the cover of the key cylinder and the cylinder arrangement portion, leading to increased size and potential inefficiencies.
Innovation Solution
The door handle device is designed with a cover that exposes the keyhole via a through-hole, where the attachment hole for the cover is positioned between specific reference lines, allowing for a smaller cover and cylinder arrangement portion, thus reducing the overall size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the attachment hole is positioned below the through-hole as in prior art, then the cover can be securely attached, but the cover and cylinder arrangement portion become larger
Solution Approach 1:
The attachment hole is repositioned from a vertical arrangement (below the through-hole) to a horizontal/intermediate arrangement (between reference lines extending from the through-hole boundaries). This dimensional repositioning allows the cover to be smaller while maintaining attachment security, as the attachment hole can now be placed in intermediate regions that optimize both coverage and attachment functionality.
2Reliability
If the attachment hole is positioned below the through-hole as in prior art, then the cover can be securely attached, but the cylinder arrangement portion becomes larger
Solution Approach 1:
By repositioning the attachment hole to intermediate positions defined by reference lines extending from the through-hole boundaries, the cylinder arrangement portion can be minimized in volume while maintaining secure attachment. This dimensional optimization allows the cylinder arrangement portion to occupy only the necessary space rather than extending vertically below the through-hole.
3Area of stationary object
If the cover size is reduced for miniaturization, then space efficiency improves, but attachment security may be compromised
Solution Approach 1:
The attachment hole is positioned in specific intermediate regions (between reference lines) where it can effectively secure a smaller cover. This localized positioning optimizes the attachment function for miniaturized covers, ensuring that the attachment hole is placed where it provides maximum security for reduced cover dimensions rather than relying on vertical distance below the through-hole.
Data Source
AI summary
A door handle device includes a base including a handle arrangement portion and a cylinder arrangement portion, a handle rotatably attached to the handle arrangement portion, a key cylinder attached to the cylinder arrangement portion, and a cover attached to the cylinder arrangement portion. The cover includes a cover main body and an attachment portion, and the cylinder arrangement portion is provided with an attachment hole. As seen along a direction in which an axis line A of a through-hole extends, the attachment hole is provided such that at least a part thereof is positioned between a first reference line passing through an upper end of the through-hole and extending in a left-right direction and a second reference line passing through a lower end of the through-hole and extending in the left-right direction.