Sewing Machine Thread Guide Partition Wall
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Solution Overview
Problem
The existing sewing machines are prone to thread entanglement with the thread guide body, leading to potential thread breakage due to strong tension applied by the thread take-up lever during sewing.
Innovation Solution
Incorporating a partition wall member between the thread spool pin and the first guide portion, which guides the thread to prevent entanglement with the tensioner and ensure smooth thread flow to the sewing needle, thereby reducing the risk of thread breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the thread is strongly pulled by the thread take-up lever during sewing, then the thread can be fed to the sewing needle, but the thread may become entangled with the thread guide body and cause thread breakage
Solution Approach 1:
The thread guide body is divided into multiple thread guide portions (first, second, third, and fourth thread guide portions) that are spatially separated and arranged in sequence. This segmentation allows the thread to be guided through distinct sections, preventing entanglement while maintaining efficient thread flow to the sewing needle during high-speed operation
Solution Approach 2:
The thread guide portions are arranged in three-dimensional space with specific spatial relationships - the first thread guide portion extends in a first direction, the second in a second direction, and so on. This multi-dimensional arrangement creates a controlled thread path that prevents the thread from contacting the thread spool pin or becoming entangled, while still enabling fast thread delivery
2Ease of operation
If the thread guide body is positioned to the left of the thread spool pin, then the thread can be guided to the bobbin winder spindle, but the thread may become entangled with the thread guide body when strongly pulled
Solution Approach 1:
The first thread guide portion acts as an intermediary element between the thread spool pin and the other thread guide portions. It receives the thread from the thread spool pin and redirects it in a controlled manner, preventing direct contact between the thread and the thread spool pin while guiding the thread smoothly to subsequent guide portions without entanglement
Solution Approach 2:
Each thread guide portion has a specific local function and orientation - the first thread guide portion is configured to receive thread from the spool pin, the second to guide it away from the spool pin area, the third to direct it toward the bobbin winder, and the fourth to finalize the thread path. This localized functional differentiation ensures smooth thread flow while preventing entanglement in critical areas
Data Source
AI summary
A sewing machine includes an arm portion, a thread spool mounting portion, a bobbin winder, a first guide portion, a second guide portion, and a partition wall member. The arm portion is provided with a drive shaft extending in a first direction. The thread spool mounting portion includes a thread spool pin to be inserted through a through hole of a thread spool. The bobbin winder is provided further to one end side of the arm portion than the thread spool mounting portion. The first guide portion is provided further to another end side of the arm portion than the thread spool mounting portion. The second guide portion is provided further to another end side in the first direction of the arm portion than the first guide portion. The partition wall member is disposed between the thread spool pin and the first guide portion in a second direction.