Foot-operated sewing machine controller with integrated pedal detection
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Solution Overview
Problem
The complexity of preparation work before sewing is increased due to the need for separate signal transmission cables for the control pedal and thread cutting pedal in existing foot-operated sewing machine controllers, especially when the thread cutting pedal is positioned on either side of the control pedal.
Innovation Solution
A foot-operated controller design that includes a main body with integrated detection elements for both pedals, allowing a single cable connection to the sewing machine, with a support unit and transmission member that enables detection of the thread cutting pedal's pressing regardless of its position relative to the control pedal, using a symmetrical and attachable/detachable structure to maintain uniform operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the control pedal and thread cutting pedal are provided in separate housings to allow flexible positioning, then adaptability is improved, but device complexity increases due to multiple signal transmission cables
Solution Approach 1:
The patent combines the control pedal and thread cutting pedal into a single integrated housing structure. The pedal operation detection elements are integrated within this single housing, allowing both pedals to share common structural support and signal transmission pathways, thereby reducing the need for separate cable connections while maintaining positioning flexibility
Solution Approach 2:
The single housing structure serves multiple functions: it houses both the control pedal and thread cutting pedal, provides common mounting support for detection elements, and facilitates unified signal transmission to the sewing machine control device. This multi-functional design reduces overall system complexity while preserving adaptability
2Ease of operation
If the thread cutting pedal is positioned on either left or right side to accommodate different users, then ease of operation is improved, but device complexity increases when using separate housings
Solution Approach 1:
The patent employs asymmetric positioning of the thread cutting pedal relative to the control pedal within the single housing. The thread cutting pedal can be positioned on either the left or right side depending on user preference, creating an asymmetric layout that adapts to different users while maintaining a unified housing structure, thereby improving ease of operation without increasing device complexity
Data Source
AI summary
A foot-operated controller of a sewing machine including a first pedal that input a number of revolution of a sewing machine motor by stepping of a user, a second pedal pressed by the user, a main body that supports the first pedal, and a support unit that supports the second pedal, in which the support unit is selectively attachable in disposition where the second pedal is on the left side of the first pedal and disposition where the second pedal is on the right side of the first pedal. In both cases where the second pedal is on the left side of the first pedal and the right side of the first pedal, across an interval between the main body and the support unit, it is possible to detect the pressing to the second pedal with respect to the second element.