Magnetic Cord Reeling Module for Miniaturized Stopper Design
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Solution Overview
Problem
Conventional cord winding modules with elastic support structures, such as compression or torsion springs, occupy significant space, limiting miniaturization due to their height and size requirements.
Innovation Solution
A magnetic attraction type cord winding module utilizing magnet blocks that work cooperatively with a stop button to brake the rotary wheel, reducing the height of the stopper structure and thus the overall module size, while using a lever structure and U-shaped members to integrate the magnets, allowing for a compact design.
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 stop button can provide elastic force to brake the rotary wheel, but the spring occupies a large space and increases the height of the stopper structure
Solution Approach 1:
The patent replaces the mechanical spring-based elastic support device with a magnetic field-based elastic support device. Magnets mounted on the rotary wheel interact with a magnetic component on the stop button, providing elastic force through magnetic attraction or repulsion without requiring physical spring structures. This substitution eliminates the space-consuming compression or torsion springs while maintaining the braking function.
Solution Approach 2:
The patent changes the physical state and interaction mechanism from mechanical contact (springs) to magnetic field interaction. By adjusting magnetic field strength, pole configurations (attractive or repulsive), and spacing, the system achieves the required elastic force with minimal space occupation, reducing the height and volume of the stopper structure.
2Reliability
If the stopper structure is designed with sufficient height to accommodate elastic support devices, then reliable braking can be achieved, but the overall height of the cord winding module increases
Solution Approach 1:
The patent replaces mechanical springs with magnetic field interactions, allowing the stopper structure to achieve stable braking without requiring sufficient height to accommodate physical spring structures. The magnetic component can be mounted on the stop button and interact with magnets on the rotary wheel at minimal spacing, dramatically reducing the required height.
Solution Approach 2:
The patent transitions from a height-dependent mechanical spring system to a magnetic field system that operates effectively in reduced spatial dimensions. The magnetic interaction can occur across small gaps perpendicular to the rotation axis, allowing reliable braking with minimal height while maintaining structural stability.
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 magnetic attraction type cord winding module effectively reduces the occupied space, allowing for miniaturization and maintaining reliable cord retraction functionality without affecting circuit signal integrity through the use of damping grease and FPC connection terminals.
Implementation Method 1
at least one pair of magnet blocks, the at least one pair of magnet blocks comprise a first magnet disposed on the stop button and a second magnet disposed on the rotary wheel, and the stop button automatically brakes the rotary wheel under the action of an attractive force or a repulsive force of the magnet blocks
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A magnetic attraction type cord winding module, comprising a rotary wheel (9) on which a cord (10) is wound and a stop button (4) working cooperatively with the rotary wheel (9). The cord winding module further comprises at least one pair of magnet blocks, and the at least one pair of magnet blocks comprise a first magnet (3) disposed on the stop button (4) and a second magnet (5) disposed on the rotary wheel (9). The stop button (4) automatically brakes the rotary wheel (9) under the action of an attractive force or a repulsive force of the magnet blocks and prevents the rotary wheel (9) from retracting the cord (10). The magnet block disposed on the stop button (4) does not protrude from the upper surface of the stop button (4), and the magnet block disposed on the rotary wheel (9) is flattened. This design can effectively reduce the height of the stopper structure and thus reduce the space to be occupied, thereby reducing the size of the cord winding module.