Guide Rail Shielding Curtain for Quiet Retraction and Trunk Access
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Solution Overview
Problem
Existing automobile shielding curtains face issues with load-bearing capacity, noise generation during operation, limited access to trunk contents during driving, interference with rear seat adjustment, and challenges in designing guide rails for non-parallel spaces at the rear of vehicles.
Innovation Solution
A guide rail type shielding curtain with a moving mechanism, including first and second stretching bearing mechanisms composed of V-shaped folding assemblies and guide rail sliding strips, which allow automatic stretching and retraction, enabling access to articles from inside and outside the vehicle while accommodating non-parallel guide rail spaces and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the strength of the rotary torsion spring increases to increase the tension of the shielding curtain cloth, then the load-bearing capacity is improved, but the retraction speed increases causing hard collision force that damages the shielding curtain
Solution Approach 1:
The patent introduces a damping mechanism with damping components (damping springs or viscous dampers) installed in the guide rails to cushion the retraction process. This beforehand cushioning reduces the collision force when the shielding curtain retracts, preventing damage to the curtain and guide rails while allowing the use of stronger torsion springs for better load-bearing capacity.
Solution Approach 2:
The patent employs a dynamic retraction control mechanism where the damping force adjusts during the retraction process. The damping components provide variable resistance that adapts to the retraction speed, allowing controlled deceleration throughout the retraction stroke to prevent hard collisions while maintaining the strength of the torsion spring system.
2Reliability
If various dampers such as reduction planetary gears and damping springs are installed to slow down retraction speed, then the collision force is reduced, but the structural complexity increases and resistance when stretching increases
Solution Approach 1:
The patent extracts only the essential damping function needed to solve the collision problem, implementing simple damping components (damping springs or viscous dampers) directly in the guide rails rather than complex reduction planetary gears. This extraction approach provides the necessary collision protection while minimizing structural complexity and stretching resistance.
Solution Approach 2:
The patent changes the damping parameters (damping coefficient, spring stiffness) to optimize the balance between collision protection and stretching ease. By carefully selecting damping parameters, the system achieves sufficient collision mitigation during retraction while maintaining acceptable stretching performance without requiring complex mechanical structures.
3Ease of operation
If the shielding curtain is designed to retract automatically using a rotary torsion spring, then the ease of operation is improved, but the hard plate pulling block shakes up and down generating noise during automobile running
Solution Approach 1:
The patent introduces guide rails as an intermediary structure between the shielding curtain and the automobile body. The guide rails provide a constrained linear motion path for the shielding curtain, preventing the hard plate pulling block from shaking up and down. This intermediary structure enables automatic retraction while eliminating the noise problem caused by uncontrolled movement.
4Adaptability or versatility
If guide rail sliding strips are made retractable to accommodate non-parallel guide rail spaces, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent makes the guide rail sliding strips dynamic and adjustable, allowing them to change position and angle to accommodate non-parallel guide rail spaces at the rear of the automobile. The sliding strips can be positioned at different angles relative to the guide rails, enabling the system to adapt to the converging geometry of the rear window area while maintaining a relatively simple overall structure.
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 enhances load-bearing capacity, reduces noise, allows easy access to trunk contents during driving, and facilitates rear seat adjustment, with a simpler and safer design that automatically stretches and retracts, improving durability and user convenience.
Implementation Method 1
a stretching spring (13) arranged between the first front folding strip (10) and the first rear folding strip (11), wherein under the action of the stretching spring (13), the first stretching bearing mechanism (3) keeps pulling the first curtain cloth (27) out of the first roller shutter tube (26) and stretching it backward
Implementation Method 2
an automatic roller shutter mechanism, which comprises a rotary torsion spring and a roller shutter tube
Implementation Method 3
first sliding strip springs (16) arranged in the left and right first guide rail sliding strip holes (15) respectively, and the first guide rail sliding strips (12) are movably arranged in the first guide rail sliding strip holes (15) outside the first sliding strip springs (16)
Data Source
AI summary
A guide rail type shielding curtain, comprising guide rail type moving mechanism, shielding curtain frame, first stretching bearing mechanism and second stretching bearing mechanism. Guide rail type moving mechanism comprises first guide rail sliding grooves and first guide rail sliding strips, which are arranged on the inner sides of automobile side plates on two sides; curtain frame mounting holes are formed in front ends of first guide rail sliding grooves; shielding curtain frame is mounted in left and right curtain frame mounting holes; stretching limiting transverse strip is provided on the rear side of first stretching bearing mechanism; first guide rail sliding strip holes are formed on left end and right end of stretching limiting transverse strip respectively; first guide rail sliding strips are arranged in first guide rail sliding strip holes; pulleys are movably arranged at the outer ends of the first guide rail sliding strips.