Sewing Machine Cutting Needle Rotation Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sewing machines require separate devices for cutting and embroidery, leading to complex and inaccurate position adjustments for filling cut parts of workpieces with embroidery patterns.
Innovation Solution
A sewing machine with a needle bar and up-and-down motion mechanism, equipped with both a sewing needle and a cutting unit having a separate motor for independent cutting needle motion and rotation, allowing for simultaneous cutting and sewing operations with precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a chain stitch sewing machine is diverted to include a cutting needle for cutting workpiece cloth, then cutting function is achieved, but separate embroidery sewing machine is still required for filling cut parts, leading to complex position adjustment
Solution Approach 1:
The patent combines the cutting needle mechanism and embroidery sewing needle mechanism into a single integrated system. The cutting needle and sewing needle share the same needle bar and drive mechanism, allowing both cutting and embroidery functions to be performed by one machine without requiring separate devices or complex position adjustments between them.
Solution Approach 2:
The needle bar mechanism is designed to perform multiple functions: it can drive both the cutting needle for cutting workpiece cloth and the embroidery sewing needle for filling cut parts with patterns. This multi-functional design eliminates the need for separate cutting and embroidery machines, simplifying the overall system while maintaining versatility.
2Ease of operation
If manual position adjustment is used to match sewing location to cut position, then flexibility is maintained, but accurate positioning is difficult to achieve
Solution Approach 1:
The system automatically performs position matching between cutting and embroidery operations through integrated control. The control unit coordinates the cutting needle and sewing needle operations based on predetermined patterns, eliminating the need for manual position adjustment while ensuring accurate positioning through automated control mechanisms.
3Reliability
If separate cutting and embroidery devices are used, then each device can be optimized for its specific function, but the overall process becomes complex and time-consuming
Solution Approach 1:
The patent merges the cutting and embroidery functions into a single integrated machine with shared components including the needle bar, drive mechanism, and control system. This integration allows both functions to be performed in sequence without the need for transferring workpieces between separate devices, significantly improving productivity while maintaining the reliability of function-specific operations.
Data Source
AI summary
A sewing machine includes a sewing machine motor configured to generate drive power to drive a needle bar up-and-down motion mechanism and a cutting unit. The cutting unit includes a cutting needle having a distal end with a blade, and a cutting needle up-and-down motion mechanism having a first motor separate from a sewing machine motor and configured to generate drive power to move the cutting needle independently of the needle bar up-and-down motion mechanism. A cut is formed by the blade as a result of up-and-down motion of the cutting needle while the cutting needle is held in a manner such that an extending direction of the cutting needle corresponds with an extending direction of the needle bar. The cutting unit further includes a cutting needle rotating mechanism configured to rotate the cutting needle about a central axis line of the cutting needle directed to the extending direction.