Flat Cable Take-Up Device With Auxiliary Wound Portion
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Solution Overview
Problem
Conventional flat cable winding devices experience slack issues due to friction resistance, leading to interference with rollers and impeded rotation, and reduced bending durability when the flat cable is wound and unwound.
Innovation Solution
A flat cable winding device with an auxiliary wound portion around the central shaft for more than half a turn, combined with a reversing roller and guide rollers, ensures smooth winding and leading out by minimizing slack through additional turns, thereby preventing interference and maintaining durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the flat cable is wound around the inner annular wall and rollers for multiple turns, then the cable management is improved, but slack is produced when the cable is led out due to friction resistance
Solution Approach 1:
The patent applies preliminary action by pre-winding the flat cable around the central shaft for more than half a turn to create an auxiliary wound portion before the cable is led out. This pre-prepared winding reserve compensates for the slack that would otherwise occur during cable payout, allowing the cable to be smoothly led out without interfering with the rollers while maintaining stable winding configuration
2Ease of operation
If the rotor is rotated in the opposite direction to lead out the flat cable, then the cable can be unwound, but the slackened cable interferes with the rollers and impedes rotation
Solution Approach 1:
The auxiliary wound portion created by pre-winding the cable around the central shaft serves as a preliminary action that ensures sufficient cable length is available during the leading out operation. This prevents the cable from becoming slack and interfering with the rollers, thereby maintaining reliable and smooth rotation of the rotor in the opposite direction
3Stability of the object's composition
If the flat cable is wound tightly to prevent slack, then the cable management is improved, but the bending durability is reduced due to repeated sharp bends
Solution Approach 1:
The patent resolves the contradiction between compact winding and bending durability by utilizing the axial dimension of the central shaft. The cable is wound around the shaft in an axial direction rather than creating tight radial loops, which distributes the bending stress over a longer path and reduces sharp bends while maintaining compact overall configuration
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 auxiliary wound portion significantly reduces slack and prevents interference with rollers, ensuring smooth operation and improved bending durability by providing extra length and reducing friction-induced issues.
Implementation Method 1
a coil spring configured to bias the rotating body in a winding direction of the flat cable
Implementation Method 2
the friction resistance induced in the flat cable wound in an overlapping fashion around the outer circumferences of the plurality of rollers and the friction resistance between the flat cable and the rollers
Data Source
Figure 1
Figure 2~3C
Figure 4~5
AI summary
Provided is a flat cable winding device and an assembling method thereof, which can prevent slack of a flat cable and achieve smooth winding and leading out of the flat cable. A flat cable winding device (1) includes a rotating table (4), a plurality of rollers (5), and a central shaft (7) rotatably and pivotally supporting the rotating table (4). The central shaft (7) includes an auxiliary wound portion (20) in which the flat cable (2) is wound for at least one turn. An inner wound portion (21) is formed along an outer circumference of the auxiliary wound portion (20), and an outer wound portion (22) is formed along outer circumferences of the plurality of rollers (5), thereby preventing the slack at the inner wound portion (21) when leading out the flat cable (2).