Thread Holding Slider for One-Handed Sewing Machine Operation
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Solution Overview
Problem
Conventional thread standing devices require both hands to apply tension to the thread, making the operation less workable and prone to errors, especially during multicolor sewing and embroidery where thread replacement is frequent.
Innovation Solution
A thread standing device with a spool pin, thread hooking base, and a thread holding slider that is slidable between two positions, allowing the thread to be held and released with one-hand operation by sliding the slider, which includes engagement portions and a cutting blade for thread management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thread is held by sandwiching it between an O-ring and a mounting part, then the thread can be securely held, but both hands are required to apply tension to the thread making the operation complex
Solution Approach 1:
A thread holding slider is introduced as an intermediary component between the thread and the mounting part. The slider includes a through hole that receives the thread, and when moved to the first position, it covers the thread hooking portion to secure the thread without requiring manual tension application. This mediator automates the thread holding function while simplifying the operation to one-handed use.
Solution Approach 2:
The thread holding slider is preliminarily positioned at the second position where the through hole is exposed, allowing easy thread insertion. After the thread is inserted and hooked on the thread hooking portion, the slider is then moved to the first position to cover and secure the thread. This preliminary positioning enables simple one-handed operation while maintaining reliable thread holding.
2Manufacturing precision
If both hands are used to grasp the thread ends for tension application, then the thread can be properly installed, but the workability decreases and errors increase
Solution Approach 1:
The thread holding slider performs the thread securing function automatically without requiring manual tension application. The slider's movement to the first position self-secures the thread in the through hole, eliminating the need for two-handed operation. This self-service mechanism maintains installation precision while significantly improving productivity during thread replacements.
Solution Approach 2:
The tension application function is extracted from the manual operation and transferred to the mechanical structure of the thread holding slider. The slider's design inherently provides the necessary tension and positioning when moved to the first position, removing the need for operator intervention in tension application and enabling faster, more accurate thread installations.
3Reliability
If the thread holding slider covers the thread hooking portion, then the thread is held securely, but the structure becomes more complex
Solution Approach 1:
The thread holding slider integrates multiple functions into a single component: it guides the thread through its through hole, secures the thread by covering the hooking portion, and can be easily moved between positions. This multi-functional design achieves reliable thread holding without proportionally increasing device complexity, as the slider is a simple movable component with a through hole and engagement features.
Data Source
AI summary
Provided with a thread standing device capable holding a thread with excellent workability and a sewing machine provided with the thread standing device. A thread standing device includes: a spool pin around which a thread reel is inserted; a thread hooking base on which a thread wound around the thread reels is hooked; and a thread holding slider which is slidable with respect to the thread hooking base, the thread holding slider being movable between a first position for covering a thread hooking portion of the thread hooking base and a second position for exposing the thread hooking portion, the thread being hooked on the thread hooking portion, wherein the thread hooked on the thread hooking portion is held when the thread holding slider is slid to the first position.