Roof Window Hinge Fastener with Adjustable Alignment
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Solution Overview
Problem
Existing roof window hinges with pivoting or double-action sashes face issues with inconsistent hole spacing between side members and covering members, leading to improper screw alignment and aesthetic problems during assembly, and previous solutions have not adequately addressed uncontrolled movements causing leaks.
Innovation Solution
A hinge with a fastener composed of a base part and a movable part, connected via a snap-on mechanism and retaining strips, allowing for precise positioning and angular movement, ensuring coaxial holes for screw alignment and a fixed connection to the supporting arm, preventing uncontrolled movements and leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fasteners with fixed-position screw holes are used in the hinge, then the assembly process is simplified, but the hole spacing inconsistency between side members and covering members causes improper screw alignment and aesthetic problems
Solution Approach 1:
The fastener is designed with a movable part that can slide along the supporting arm to adjust the position of the screw hole. This dynamic adjustment capability allows the fastener to adapt to variations in hole spacing between different side members, ensuring proper alignment with covering members while maintaining ease of assembly.
Solution Approach 2:
The position of the screw hole in the fastener can be changed by sliding the movable part along the supporting arm. This parameter change enables the fastener to accommodate different hole spacing requirements of various side members, resolving the inconsistency issue while keeping the assembly process simple.
2Adaptability or versatility
If a fastener with slidable connection to the supporting arm is used, then hole spacing flexibility is improved, but uncontrolled movements of the covering member occur causing leaks
Solution Approach 1:
The fastener includes a positioning mechanism that preliminarily sets the correct position of the movable part relative to the supporting arm. This preliminary positioning ensures that once the fastener is assembled, the screw hole is automatically aligned with the corresponding hole in the side member, preventing uncontrolled movements and potential leaks.
Solution Approach 2:
The positioning mechanism provides feedback by physically constraining the movable part to specific positions where the screw hole aligns with the side member holes. This feedback mechanism prevents uncontrolled sliding and ensures reliable sealing by maintaining precise alignment during assembly and operation.
3Ease of operation
If the fastener allows angular movement for alignment, then ease of assembly is improved, but connection stability may be compromised
Solution Approach 1:
The fastener allows angular movement during the assembly process to facilitate alignment between the screw hole and the side member holes. Once aligned, the positioning mechanism engages to lock the movable part in place, providing stability. This dynamic-to-static transition resolves the contradiction between ease of alignment and connection stability.
Data Source
Figure 1
Figure 2
Figure 3a
AI summary
The fastener for connecting the external member covering the pivoting or double action sash of the roof window with the side member of the sash, the fastener has two functional parts, the base part (3) and the movable part (4), which are connected together during assembly and positioning on the supporting arm (2), in the base part (3) is hole (31) and in movable part (4) is blind hole (41), and both holes in closed position of the fastener are coaxial and define the socket for elements used for fastening the covering member.