Sunshade Fastener Rigid Projections Tool-Free Installation
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Solution Overview
Problem
Existing sunshade fasteners for glazed balconies have exposed gripping projections that impair appearance and are prone to unfastening due to elasticity, requiring complex installation procedures.
Innovation Solution
A fastener with a bracket part featuring rigid, plate-like fastening projections that are substantially smaller in width than length, allowing for secure and tool-free installation and reliable attachment to the edge rail of a sunshade, utilizing a trough-like fastening element for secure engagement with the glazing edge profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If elastic tongues with gripping projections are used for tool-free installation, then ease of operation is improved, but reliability deteriorates due to bending under load and wind stresses
Solution Approach 1:
The patent changes the physical state of the fastening projections from elastic (flexible) to rigid, fundamentally altering the mechanical properties to eliminate bending under load while maintaining installation ease through the rigid structure's geometric design
2Reliability
If locking pins are added to prevent tongue bending, then reliability is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The patent removes the locking pin component entirely from the design, extracting the problematic element that required additional installation steps while maintaining reliability through the rigid fastening projection design
Solution Approach 2:
The patent combines the fastening function and the anti-bending function into a single rigid structure, eliminating the need for separate locking components by integrating all functions into the unified fastener body
3Ease of operation
If exposed gripping projections are used for fastening, then ease of operation is improved, but appearance deteriorates due to visible projections
Solution Approach 1:
The patent removes the exposed gripping projections from the visible surface, extracting the aesthetic problem while maintaining the fastening function through the rigid projection design that can be positioned or concealed
Data Source
Figure 1~2a
Figure 2b~2c
Figure 3a~3b
AI summary
The fastening for a sunshade comprises a bracket part (20), a first fastening projection (12) projecting in the first direction from the level of the bracket part, and a second fastening projection (14) projecting in the second direction from the level of the bracket part. The width of the first and the second fastening projections is sub-stantially smaller than the length of the fastener. The first fastening projection is at the first end of the fastener when viewed in the longitudinal direction of the fastener, and the second fastening projection is at the second end of the fastener when viewed in the longitudinal direction of the fastener. The bracket part may be a plate-like element with a first edge (16), into which the first fastening projection and the second fastening projection are arranged. Preferably, the first and the second fastening projection are substantially parallel, plate-like elements, and the first fastening projection turns at the first edge of the bracket part to the first direction, and the second fastening projection turns at the first edge of the bracket part to the second direction. The bracket part may comprise a second edge (18) with a fastening element (22) for fastening into the edge profile of a glazing.