Motorized Thread Tensioner for Sewing Machines
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Solution Overview
Problem
Users of traditional sewing machines face difficulties in achieving optimal thread tension due to the manual adjustment process, which can be cumbersome and prone to errors, especially when switching between different types of threads.
Innovation Solution
A motorized thread tensioner system that includes disks, a spring, and an electric motor, allowing for controlled friction adjustment on the thread, with preset tension controls and a graphical user interface for easy operation and optimal tension setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a manual knob is used to adjust thread tension, then the user can control the tension on the top thread, but the user must remember the number of rotations and partial rotations to achieve optimal tension when switching between different types of thread
Solution Approach 1:
The patent replaces the manual mechanical knob adjustment system with an automated motorized system. The motorized thread tensioner uses an electric motor to rotate the tensioning mechanism, eliminating the need for manual knob rotation and memory of rotation counts. The system automatically adjusts tension based on programmed parameters for different thread types.
Solution Approach 2:
The patent implements preset tension settings that are pre-programmed for different types of thread. When a user selects a specific thread type, the corresponding preset tension parameters are automatically applied, eliminating the need to manually adjust and remember rotation counts for each thread type. The optimal tension settings are prepared in advance and readily available.
2Adaptability or versatility
If a manual knob is used to adjust thread tension, then the user can vary the tension on the top thread, but the process is cumbersome and prone to errors
Solution Approach 1:
The patent replaces the manual mechanical adjustment process with an automated motorized control system. This substitution eliminates human errors associated with manual knob rotation, such as over-rotation, under-rotation, or inconsistent positioning. The motorized system provides precise and repeatable tension adjustments based on programmed parameters.
Solution Approach 2:
The patent incorporates feedback mechanisms that monitor and verify the tension settings. The system can detect the actual tension applied and compare it with the target tension from preset parameters, making necessary adjustments to ensure accurate and reliable tension control. This feedback loop prevents errors and ensures consistent results.
3Ease of operation
If a motorized thread tensioner is used, then the user can easily achieve optimal tension, but the device complexity increases
Solution Approach 1:
The patent introduces a motorized system to replace manual adjustment mechanisms, which simplifies the user interface while adding automated components. The motorized thread tensioner includes an electric motor, control circuitry, and preset memory, but these additions are integrated into the existing tensioner structure, balancing automation benefits with structural considerations.
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 users to easily achieve consistent and optimal thread tension across different types of threads, reducing the complexity and error associated with manual adjustment.
Implementation Method 1
a spring configured to exert a force against the second disk to cause friction on the thread
Data Source
AI summary
Motorized thread tensioner for a sewing machine. In one example embodiment, a motorized thread tensioner for a sewing machine may include a first disk, a second disk, a spring, a shaft having threads on a distal end, a nut threaded onto the threads of the shaft, and an electric motor. The shaft may be through the first disk, the second disk, and the spring. The electric motor may be coupled to the nut and configured to rotate the nut in a first rotational direction and a second rotational direction that is opposite to the first rotational direction. The rotation of the nut in the first rotational direction may cause the shaft to travel toward the electric motor. The rotation of the nut in the second rotational direction may cause the shaft to travel away from the electric motor.