Rotatable Sewing Machine Head for Thick Material Handling
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Solution Overview
Problem
Sewing machines face difficulties in handling thick materials due to limited space between the presser foot and needle seat, requiring detaching and reassembling procedures for insertion and removal, and restricting lateral removal of rolled materials.
Innovation Solution
An adjustable positioning device with a main frame, needle seat, and a head that includes a fixed and rotational seat with a shaft sleeve, allowing angular movement to increase the distance between the head and needle seat for easy insertion and removal of thick materials, featuring a ball and retaining member mechanism for secure engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the space between the presser foot and needle seat is kept compact for normal sewing operations, then the sewing machine can handle standard materials efficiently, but thick materials cannot be inserted or removed without detaching and reassembling the needle and presser foot
Solution Approach 1:
The head is made rotatable relative to the fixed seat through a shaft sleeve and shaft mechanism, allowing the distance between the head and needle seat to be dynamically adjusted. During sewing operations, the head rotates to a first position with the needle and presser foot close to the needle seat for normal operations. When thick materials need to be handled, the head rotates to a second position that increases the distance, enabling easy insertion and removal of thick materials without disassembly.
2Adaptability or versatility
If the needle and presser foot are detached for thick material insertion, then thick materials can be inserted, but the detaching and reassembling procedures are troublesome and time-consuming
Solution Approach 1:
Instead of requiring complete disassembly and reassembly, the invention allows the head to be quickly rotated between two positions. The rotational mechanism with shaft sleeve and positioning holes enables rapid repositioning of the head, significantly reducing the time and effort required to handle thick materials compared to full detaching and reassembling procedures.
3Ease of operation
If the material is rolled in the space for sewing, then sewing can proceed, but the rolled material can only be removed in forward/backward direction, not allowing lateral removal
Solution Approach 1:
The rotatable head mechanism enables lateral removal of rolled materials by rotating the head to a second position that increases the distance between the head and needle seat. This creates sufficient clearance for materials to be extracted in lateral directions, not limited to forward/backward removal only, thereby enhancing operational flexibility and ease of material handling.
Data Source
AI summary
A sewing machine includes a main frame including a needle seat, a beam, and a head supported by the beam. The head includes elements for sewing operation in association with the needle seat. A fixed seat is fixed to the beam and a rotational seat is fixed to the head to turn therewith. The rotational seat and the fixed seats include aligned axial holes. A shaft sleeve extends from the rotational seat and rotatably extends through the axial hole of the fixed seat. The head and the rotational seat are movable relative to the fixed seat between an operative position allowing sewing operation and an inoperative position angularly spaced from the operative position. A distance between the head and the needle seat is increased when the head is moved from the operative position to the inoperative position, allowing easy insertion and removal of thick materials during a sewing operation.