Sewing Machine Thread Take-Up Cover Segmentation
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Solution Overview
Problem
Existing sewing machines require laborious and time-consuming processes for setting and maintaining the thread take-up lever, as the entire thread system must be dismantled and reassembled for maintenance, and adjusting spring resilience is cumbersome due to interference between components.
Innovation Solution
The sewing machine design includes a support member with independently detachable cover members that allow easy thread insertion and maintenance, featuring a thread take-up spring with adjustable resilience without removing threads, and a prevention member to prevent thread slippage and rearward flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the thread take-up lever cover is integrally covering multiple thread take-up levers, then the structure is compact and integrated, but maintenance becomes laborious and time-consuming as all threads must be removed and reassembled
Solution Approach 1:
The thread take-up lever cover is divided into multiple independently detachable cover members, each corresponding to a specific thread take-up lever. This segmentation allows individual covers to be removed for maintenance without affecting other parts of the system, resolving the contradiction between integrated structure and maintenance convenience.
2Adaptability or versatility
If the disk has multiple holes formed along the same imaginary circle, then spring resilience is adjustable by changing the hole position, but the operation becomes cumbersome due to interference between holding plates
Solution Approach 1:
The disk is extracted from the holding plate assembly, allowing it to be detached and repositioned independently. This enables adjustment of spring resilience by changing the hole position on the disk without being constrained by the holding plate structure, resolving the contradiction between adjustability and operational convenience.
3Ease of operation
If the thread is directed along the recessed groove into the triangular thread take-up hook section, then the thread setting process is simplified, but the thread may slack during sewing operation
Solution Approach 1:
A prevention member is introduced as an intermediary element between the thread and the thread take-up spring. This prevention member prevents the thread from flowing rearward and slipping off during sewing operations, while still allowing the simplified thread setting process through the recessed groove and triangular hook section.
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
Facilitates easy thread setting and maintenance by allowing independent detachment of cover members and adjustable spring resilience without disassembling the entire thread system, reducing operational time and effort.
Implementation Method 1
a thread take-up spring (15; 37) disposed on the front surface of the support member cover (7; 31)
Data Source
AI summary
Sewing machine includes, in association with each thread take-up levers: a thread take-up member provided on the front surface of a support member cover and having a thread take-up spring; a prevention member for preventing a thread, put on the thread take-up spring, from flowing rearward; a cover member provided in front of the thread take-up member and independently detachable in a forward direction; and a guide section having a valley portion formed therein for receiving therein a distal end portion of the thread take-up spring and movably guiding the received distal end portion. The cover member has a lower end portion opened to permit insertion therein of a thread and is constructed to guide the thread from the lower end portion to the thread take-up spring. The cover member may further include a guide wall for guiding the thread from the lower end portion to the thread take-up spring.