Sunshade Guide Channel Locking Mechanism for Edge Retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sunshade guides with flexible sunscreens face issues with lateral pull-out forces due to inadequate cooperation between guide locking and edge locking members, leading to unpredictable dimensions and manufacturing challenges, causing the guides to fail in maintaining the sunscreen edges within the guide channels.
Innovation Solution
The use of separate plastic parts with guide locking members that engage the guide legs, providing a stable and consistent guide channel while allowing for manufacturing flexibility, with features like protrusions, shaped ends, and movable parts to secure the sunscreen edges, and optional flexible lips for accommodating larger dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the guide channel entrance opening size is reduced to prevent sunscreen edges from coming out, then the guide locking capability is improved, but the guide cannot accommodate larger dimensioned members and manufacturing tools are prone to collapse
Solution Approach 1:
The guide is divided into two functional segments: a rigid guide body made of metal that provides structural strength and maintains the guide channel geometry, and a separate plastic guide locking member that provides the locking function. This segmentation allows each part to be optimized independently - the metal guide maintains a large opening for versatility while the plastic locking member provides reliable edge retention.
Solution Approach 2:
The guide system combines two different materials with complementary properties: metal (aluminium) for the guide body providing rigidity and strength, and plastic for the guide locking member providing flexibility and locking capability. This composite approach resolves the contradiction by allowing the metal guide to maintain a large opening while the plastic component ensures reliable locking.
2Manufacturing precision
If the guide dimensions are maintained precisely through manufacturing tool control, then the guide channel geometry is consistent, but manufacturing tools wear and dimensions become unpredictable
Solution Approach 1:
The guide system is segmented into a metal guide body and a separate plastic guide locking member. The plastic component is designed with tolerance compensation features that absorb dimensional variations from metal guide manufacturing. This allows the metal guide to be manufactured with standard tolerances while the plastic part ensures consistent functional performance.
Solution Approach 2:
The plastic guide locking member incorporates design parameters that compensate for metal guide dimensional variations. The plastic material's inherent flexibility and the component's geometric design allow it to adapt to a range of metal guide dimensions, effectively decoupling the functional consistency from the manufacturing precision requirements of the metal guide.
3Device complexity
If the guide locking members are integrated into the metal guide, then the guide structure is simplified, but the guide cannot withstand sufficient lateral pull out forces
Solution Approach 1:
The guide system uses a composite construction where the metal guide body provides structural framework and the plastic guide locking member provides the actual locking function. The plastic material offers superior friction characteristics and elasticity for engaging the sunscreen edge, while the metal provides overall structural support. This composite approach significantly enhances lateral pull-out force resistance compared to metal-only designs.
Solution Approach 2:
The plastic guide locking member acts as an intermediary between the metal guide structure and the sunscreen edge. It transfers and amplifies the locking action, providing enhanced friction and elastic engagement that pure metal-to-metal contact cannot achieve. This intermediary component is key to withstanding high lateral pull-out forces.
Data Source
AI summary
A guide is presented intended for use in a sunshade assembly of the type comprising a flexible sunscreen having opposed longitudinal edges and two opposed longitudinal guides each comprising at least two spaced guide legs for defining there between a guide channel for receiving therein and guiding corresponding ones of the opposed longitudinal edges of the sunscreen. The guides and longitudinal edges are provided with cooperating guide locking members and edge locking members for preventing the longitudinal edges of the sunscreen from moving out of the guide channels. The guide locking members are defined on separate parts engaging the guides.