Sewing Machine Integrated Pull Rod for Thread Trimming and Transport
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Solution Overview
Problem
Conventional sewing machines have a bulky design that limits access to difficult-to-reach sewing areas and often require separate components for thread cutting and material transport, leading to inefficiencies and complications in complex sewing tasks.
Innovation Solution
A compact sewing machine design that utilizes a pull rod for both thread cutting and transporter transmission, eliminating the need for a separate bearing rod, with adjustable elements for the thread trimming knife and feed dog, allowing for independent positioning and decoupling of thread trimming from material transport, enabling more accessible and versatile sewing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a separate bearing rod is used for the transporter transmission mechanism, then the machine structure is stable and reliable, but the housing becomes bulky and less accessible in difficult-to-reach sewing areas
Solution Approach 1:
The patent combines the bearing body for the transporter transmission mechanism with the pull rod of the thread trimming knife transmission mechanism into a single integrated component. This merging eliminates the need for a separate bearing rod, reducing the housing volume and improving accessibility to difficult-to-reach sewing areas while maintaining structural stability through the integrated design
Solution Approach 2:
The pull rod is designed to serve dual functions: actuating the thread trimming knife and simultaneously serving as the bearing body for the transporter transmission mechanism. This multi-functionality reduces the number of separate components needed, making the housing more compact and accessible while maintaining reliable operation of both the thread trimming and material transport functions
2Volume of moving object
If the bearing body is connected to the pull rod, then the housing becomes compact and accessible, but the transporter may be accidentally actuated during thread trimming
Solution Approach 1:
The patent segments the functional connections by using a securing body that can selectively engage with the bearing body. This allows the bearing body to be positioned on the pull rod for compact housing design, while the securable connection enables independent control - the transporter can be locked in place during thread trimming operations, preventing accidental actuation while maintaining the compact integrated structure
3Device complexity
If thread cutting and material transport are coupled, then the machine structure is simplified, but independent adjustment of thread trimming blade and feed dog positions is lost
Solution Approach 1:
The patent implements dynamic adjustability by providing separate adjusting elements for the thread trimming blade and feed dog positions. These adjusting elements allow independent positioning while the components remain part of an integrated transmission mechanism. The bearing body can be positioned at different locations on the pull rod, and both the thread trimming blade and feed dog can be independently adjusted, providing operational flexibility within the simplified coupled structure
Data Source
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AI summary
The machine has a needle bar mounting a sewing needle for formation of a joint in a passing region, and transporters transporting a sewing material at the passing region. A bearing support (27) of a transporter-transmission mechanism is mounted on a connecting rod (28) for material transportation of the transporters. The bearing support is movably connected with the connecting rod such that the bearing support axially forms a transmission mechanism (29) of a thread-sectioned blade (49) during axial displacement of the connecting rod.