Bottom thread control mechanism for sewing machine

A control mechanism and technology for sewing machines, which are applied to the ferrule mechanism for sewing machines, sewing machine components, sewing equipment, etc., can solve the problems of inconvenient disassembly and maintenance, poor operability, etc., and achieve convenient disassembly and maintenance, improve production efficiency, and reduce costs. Effect

Active Publication Date: 2015-09-02
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure has poor operability when threading, and it is inconvenient to disassemble and maintain

Method used

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  • Bottom thread control mechanism for sewing machine
  • Bottom thread control mechanism for sewing machine
  • Bottom thread control mechanism for sewing machine

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0019] The present invention will be further described below with specific embodiment, see figure 1 -6:

[0020] A bottom thread control mechanism of a sewing machine, which includes a pin shaft with one end fixed on the casing 1, on the pin shaft is provided a threading frame wrench 3 that rotates around it and is driven by the first return torsion spring 2 to automatically reset. One side of the frame wrench 3 is provided with a wire frame 4, the wire frame 4 is connected with the block 5, the block 5 is fixed on the casing 1, the wire frame 4 rotates around the block 5 and is driven by the second reset torsion spring 6 The drive automatically resets, the wire frame wrench 3 is provided with a card slot 7, and the wire frame 4 is provided with a limit pin 8, and the limit pin 8 is in the working state when it is arranged in the card slot 7 of the wire frame wrench 3 , the limit pin 8 is in the threading state of the wiring frame 4 after disengaging from the card slot 7 .

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PUM

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Abstract

The invention belongs to the technical field of sewing machines, and particularly relates to a bottom thread control mechanism for a sewing machine. The bottom thread control mechanism comprises a pin shaft with one end fixed on a casing, wherein a stitching frame spanner which rotates around the pin shaft and is driven by a first reset spring to perform automatic resetting is arranged on the pin shaft, a stitching frame is arranged on one side of the stitching frame spanner and connected with a stop block fixed on the casing, the stitching frame rotates around the stop block and is driven by a second reset torsional spring to perform automatic resetting, a clamping groove is formed in the stitching frame spanner, a limiting pin is arranged on the stitching frame, and the stitching frame is in a working state when the limiting pin is arranged in the clamping groove of the stitching frame spanner and is in a threading state after the limiting pin is separated from the clamping groove. Automatic resetting structures of two torsional springs are arranged, the threading state and the working state of the stitching frame can be conveniently switched by simply operating the stitching frame spanner, and when a stitching cam is wound with a thread, dismounting and maintaining are very convenient.

Description

Technical field: [0001] The invention belongs to the technical field of sewing machines, in particular to a bottom thread control mechanism of a sewing machine. Background technique: [0002] The existing sewing machine bottom thread control mechanism is to fix the threading frame on the sheet metal part through the axial screw, and then fix the sheet metal part on the casing, and the threading frame rotates around the axial screw. The position pin is provided with a wire frame wrench below the wire frame, and is in working condition when the manual operation limit pin is stuck on the wire frame wrench. Manually disengage the limit pin from the punching frame wrench, and turn it upward around the shaft screw to thread. This structure has poor operability when threading, and it is inconvenient to disassemble and maintain. Invention content: [0003] The purpose of the present invention is to provide a sewing machine bobbin thread control mechanism which is simple and conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B63/00
Inventor 刘小刚王志宋兴健王恒
Owner JACK SEWING MASCH CO LTD
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