Thread loosening and presser foot lifting mechanism of sewing machine and sewing machine
By introducing a combined drive structure of top plate and thread loosening pin into the sewing machine, the functions of thread loosening and presser foot lifting are simplified and precisely controlled, solving the problem of complex structure in existing sewing machines and improving working accuracy and ease of use.
CN120625267BActive Publication Date: 2026-06-09ZHEJIANG NANYUAN SEWING EQUIPMENT CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG NANYUAN SEWING EQUIPMENT CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
The existing sewing machine's thread loosening and presser foot lifting functions suffer from complex structure and low working accuracy.
Method used
The device uses a combination of a top plate and a wire loosening pin. The lifting and pressing foot assembly drives the device to rotate around a pivot, which in turn causes the wire loosening pin to open the wire clamp and loosen the wire. The height and pressure of the pressing foot can be adjusted by an adjusting component.
Benefits of technology
The simplified drive structure for loosening the line and raising the presser foot improves working accuracy, and the presser foot height and pressure can be adjusted without removing the end cap, thus improving ease of use.
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Smart Images
Figure CN120625267B_ABST
Abstract
This invention relates to the field of sewing machine technology, and discloses a thread-releasing and presser foot lifting mechanism for a sewing machine and a sewing machine. The mechanism includes a thread-releasing assembly for opening the thread clamp and a presser foot lifting assembly. The thread-releasing assembly includes a top plate rotatable around a pivot and a thread-releasing pin. The top plate is driven to rotate around the pivot by the presser foot lifting assembly, thereby causing the thread-releasing pin to open the thread clamp and perform a thread-releasing action. The presser foot assembly includes a presser foot rod and a presser foot. The presser foot lifting assembly includes an adjusting block fixedly mounted on the presser foot rod and a manual presser foot lifting component. A toggle block is provided on the rear side of the adjusting block. The presser foot assembly also includes an adjusting component for adjusting the presser foot lifting height and pressure. By using the top plate and the thread-releasing pin, when the presser foot is lifted by the presser foot lifting assembly, it is driven to rotate around the pivot, thereby causing the thread-releasing pin to open the thread clamp and perform a thread-releasing action. This ensures that the thread clamp automatically completes the thread-releasing action during the presser foot lifting process, thus simplifying the structure and improving working accuracy.
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