Arc Spring Wire Cord Winding Module Miniaturization
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Solution Overview
Problem
Existing cord winding modules for electronic devices are limited in miniaturization due to the space occupied by traditional elastic support structures such as compression or torsion springs in their stopper mechanisms.
Innovation Solution
A cord winding module utilizing a spring wire with an arc shape that cooperates with a stop button to provide elastic support, reducing the module's size by integrating the spring wire into a receiving groove and employing a ratchet pawl mechanism for controlled retraction, while also using damping grease to manage unwinding speed and prevent cord damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compression spring or torsion spring is used as an elastic support device in the stopper structure, then the stopper structure can provide reliable elastic support and braking function, but the module occupies a large space which limits miniaturization
Solution Approach 1:
The patent changes the physical form and parameters of the elastic support device from traditional compression springs or torsion springs to a spring wire with arc shape. This parameter change allows the elastic support function to be achieved with significantly reduced dimensions, enabling miniaturization of the cord winding module while maintaining reliable elastic support and braking functionality
Solution Approach 2:
The patent employs an arc-shaped spring wire instead of linear spring structures. The curvature of the spring wire provides the necessary elastic restoration capability while occupying minimal space. The arc shape allows the spring wire to be integrated into the receiving groove structure, achieving both compactness and functional reliability
2Volume of stationary object
If the spring wire is integrated into the receiving groove structure, then the module achieves miniaturization, but the installation and assembly complexity increases
Solution Approach 1:
The patent merges the spring wire with the receiving groove structure, where the spring wire is installed within the receiving groove and works cooperatively with the stop button. This merging eliminates the need for separate mounting structures and reduces the number of components, thereby simplifying the overall assembly process despite the integrated design
Solution Approach 2:
The spring wire structure is designed to be self-containing within the receiving groove, where its ends can be bent to form engaging portions that secure it in place. This self-service design reduces the need for additional fastening operations or complex installation procedures, making the miniaturized structure easier to manufacture and assemble
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 reduces the module's size, ensures reliable and damage-free cord retraction, and maintains consistent circuit connections through elastic pieces and FPC terminals, enhancing the overall efficiency and durability of the cord management system.
Implementation Method 1
a spring wire working cooperatively with the stop button as an elastic support device, and the stop button automatically brakes the rotary wheel under the action of the elastic force of the spring wire
Implementation Method 2
a coil spring installed in an energy storage chamber, one end of the coil spring is fixed on the rotating shaft, and the other end is fixed on the sidewall of the energy storage chamber
Implementation Method 3
damping grease is provided in the energy storage chamber
Data Source
AI summary
A cord winding module, comprising a rotary wheel (9) on which a cord (11) is wound and a stop button (4) working cooperatively with the rotary wheel. The cord winding module further comprises a spring wire (5) working cooperatively with the stop button as an elastic support device, and the stop button automatically brakes the rotary wheel under the action of the elastic force of the spring wire and prevents the rotary wheel from retracting the cord. The spring wire has an arc shape, or exhibits an arc shape when pre-pressed and deformed by the stop button.