Shade Roller Pull Bar Clip Attachment Mechanism
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Solution Overview
Problem
The existing shade roller apparatus for vehicle windows requires multiple components and processes to attach the pull bar to the shading sheet, leading to instability and increased complexity.
Innovation Solution
A shade roller apparatus with a pull bar featuring a clip portion that includes upper and lower clip pieces with a pivot, a retaining piece, and meshing portions to securely attach the shading sheet, eliminating the need for sewing and swaging, and reducing the number of components and processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sewing and swaging processes are used to attach the pull bar to the shading sheet, then the attachment stability is improved, but the number of components and processes increases
Solution Approach 1:
The invention integrates the attachment function into a single integrated pull bar structure that combines the holding portion and positioning function. The C-shaped holding portion directly engages with the shading sheet hem without requiring separate sewing operations or swaging processes, thereby reducing both component count and manufacturing steps while maintaining secure attachment.
Solution Approach 2:
The invention extracts and eliminates unnecessary intermediate components such as separate sewing threads, spindles, and swaging tools. By designing the pull bar with a direct clip-style holding portion that mechanically engages the shading sheet hem, the patent removes these extraneous elements and their associated processes, achieving simpler construction without compromising attachment reliability.
2Reliability
If multiple attachment processes are used, then the attachment stability is improved, but the manufacturing time increases
Solution Approach 1:
The pull bar is pre-formed with the C-shaped holding portion and positioning ends during manufacturing. This preliminary preparation allows the attachment process to proceed directly by simply engaging the holding portion with the shading sheet hem, eliminating the need for time-consuming on-site sewing or swaging operations and significantly reducing assembly time.
Solution Approach 2:
The invention skips traditional time-intensive attachment processes such as sewing multiple stitches and performing swaging operations. Instead, the design enables a rapid single-step attachment where the pull bar is simply clipped or snapped onto the shading sheet hem, dramatically accelerating the manufacturing process while ensuring stable attachment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a stable and secure attachment of the pull bar to the shading sheet, reducing the risk of wrinkling and detachment, while minimizing the number of components and processes required, and enhancing the attachment stability.
Implementation Method 1
upper clip piece (73) and a lower clip piece (74) configured to open/close with one end portions functioning as a pivot (72) to clip the front hem of the shading sheet (51)
Data Source
AI summary
A shade roller apparatus is provided to achieve stable attachment of a pull bar to a shading sheet, and reduce the numbers of components and process steps required for the attachment. The pull bar may include a clip portion clipping a front hem of the shading sheet along an entire length of the pull bar, and a bottom wall below the clip portion. While having a front end retained by the clip portion, the shading sheet can wrapped around the pull bar such that the shading sheet sequentially passes over an upper surface and a front surface of the clip portion and then continues along the bottom wall.