Conical Roller Presser Foot for Straight and Curve Sewing
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Solution Overview
Problem
Conical roller-type sewing machine presser feet are unsuitable for straight sewing due to varying outer diameters along the axial direction, causing feed discrepancies and fabric wrinkling.
Innovation Solution
A sewing machine presser foot with a support part and a roller part comprising multiple rotating members with different diameters, allowing independent rotation to maintain consistent outer circumferential speed, and featuring intermediate support members and protruding pieces to prevent interference and ensure smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conical roller presser foot with varying outer diameters is used, then curve sewing capability is improved, but straight sewing quality deteriorates due to feed amount discrepancies and fabric wrinkling
Solution Approach 1:
The roller presser foot is divided into multiple independently rotatable rotating members (at least two) along the axial direction. Each rotating member can rotate independently around the axial direction, allowing different sections of the roller to have different rotational characteristics while maintaining overall conical shape for curve sewing capability.
Solution Approach 2:
The rotating members are configured to rotate independently rather than as a fixed rigid structure. This dynamic independence allows each rotating member to adjust its rotation to maintain consistent outer circumferential speed across different diameters, preventing fabric feed discrepancies during straight sewing while preserving the conical shape needed for curve sewing.
2Adaptability or versatility
If a conical roller with different outer diameters at different positions is used, then the presser foot is suited for curve sewing, but feed amount varies between pressing points causing fabric wrinkling
Solution Approach 1:
The roller is segmented into multiple rotating members that can rotate independently. This segmentation allows each member to compensate for the varying diameter effect, ensuring uniform fabric feed across different radial positions while maintaining the conical outer shape for curve sewing adaptability.
Solution Approach 2:
The rotational parameters (rotation speed, direction) of each rotating member can be independently controlled or adjusted. By changing the rotation parameters of individual members, the system maintains consistent outer circumferential speed across all pressing points, eliminating fabric wrinkling while preserving the conical geometry for curve sewing.
3Adaptability or versatility
If multiple rotating members with different diameters are used to form a conical roller, then both curve and straight sewing become possible, but device complexity increases
Solution Approach 1:
The roller presser foot is divided into multiple rotating members (at least two) that can rotate independently around the axial direction. Each member has a different diameter, and together they form the conical roller structure. This segmentation enables both curve and straight sewing capabilities while keeping the structural complexity manageable through modular design.
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
Enables seamless straight sewing without fabric wrinkling by ensuring equal outer circumferential speed across rotating members, making the presser foot suitable for both curve and straight sewing.
Implementation Method 1
each of the plurality of rotating members individually rotating and pressing a fabric to be sewn
Data Source
AI summary
A sewing machine presser foot includes a support part having a support base member, and a roller part including a plurality of rotating members rotatably supported at the support base member and having different diameters so that the roller part is conical as a whole. Each of the plurality of rotating members individually rotates and presses a fabric to be sewn.