Vehicle Sunshade Single Rope Force Balance
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Solution Overview
Problem
Existing sunshade apparatuses for vehicles face challenges in adjusting the phase difference between left and right unwinding forces, leading to potential inclination and rucking of the light blocking sheet due to shifting forces and phase differences.
Innovation Solution
A sunshade apparatus with a single rope member that is adjustably engaged with the light blocking sheet's second edge portion, allowing for easy adjustment of phase difference and unwinding forces, featuring an urging member to maintain power equilibrium and stabilize the sheet's position, along with guide rails and hook portions for smooth operation and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If two wires are used to provide unwinding force on both sides of the light blocking sheet, then the unwinding force can be distributed to both sides, but the number of adjusting steps increases and the phase difference between left and right becomes difficult to control
Solution Approach 1:
The patent combines two separate wire systems into a single rope member that spans both sides of the light blocking sheet. This single rope member is wound around a common winding tube, merging the force application mechanism into one unified system. The rope extends from both end portions of the second edge portion toward the light-blocking side and turns at turning members on both sides, allowing both left and right unwinding forces to be controlled through a single adjustment mechanism, thereby reducing the number of adjusting steps while maintaining balanced force distribution.
2Force
If the unwinding forces on the left and right sides are adjusted separately, then each side can be optimized independently, but the operating bar becomes inclined and the light blocking sheet rucks due to phase difference
Solution Approach 1:
By merging the force application into a single rope member system, the patent ensures that both left and right unwinding forces are applied simultaneously and equally. The rope member connects both sides through a common winding mechanism, making it impossible to create phase differences between sides. This eliminates the inclination of the operating bar and prevents rucking of the light blocking sheet, as both sides move together in unison during operation.
Solution Approach 2:
The patent creates an equipotential force distribution system where both sides of the light blocking sheet experience equal unwinding forces at all times. The single rope member wound around the winding tube ensures that force is distributed equally to both turning members, maintaining force equilibrium. This equipotential force application prevents any side from having excessive or insufficient force, thereby maintaining the flatness of the light blocking sheet throughout operation.
3Force
If multiple wires are used for unwinding, then force distribution is possible, but the adjustment of phase difference and unwinding forces becomes complex and time-consuming
Solution Approach 1:
The patent merges multiple wire adjustment operations into a single rope member adjustment. The rope member, being a single continuous element, allows force distribution to both sides through one winding action on the winding tube. This eliminates the need for separate adjustment procedures for left and right sides, dramatically reducing adjustment time while maintaining effective force distribution across both sides of the light blocking sheet.
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
Facilitates easy adjustment of phase difference and unwinding forces, reducing the likelihood of inclination and rucking, improving the sunshade's stability and appearance by simplifying assembly and operation while maintaining the sheet's position effectively.
Implementation Method 1
an urging member configured to urge the winding member to rotate
Implementation Method 2
a single rope member which is adjustably engaged with a second edge portion serving as an blocking side edge portion of the light blocking sheet in the operating direction of the light blocking sheet, extends from both end portions of the second edge portion respectively toward the light-blocking side in the operating direction of the light blocking sheet and turns at both of the turning members respectively toward the opening side in the operating direction of the light blocking sheet
Data Source
Figure 1~2
Figure 3
Figure 4A~4B
AI summary
A sunshade apparatus includes: a light blocking sheet (14) to block light at an opening (2) of a vehicle and open the opening; a winding member (13) to which a first edge (14a) of the sheet (14) is fixed and which is capable of winding and unwinding the sheet (14); turning members (18) disposed on both sides of the opening (2) in the width direction; a single rope member (19) adjustably engaged with a second edge (14b) of the sheet (14) in the operating direction, extending from both end portions of the second edge (14b) respectively toward the light-blocking side in the operating direction, and turning at both of the turning members (18) respectively toward the opening side in the operating direction, and whose both side terminals are respectively fixed to both end portions of the winding member (13) to be capable of being wound and unwound by the winding member (13); and an urging member (20) to urge the winding member to rotate.