Lower thread cutter of sewing machine

Abstract

The invention relates to a lower line shearing device for the sewing machine, comprising a fixing panel group and a shear line group. The fixing panel group comprises a first fixing panel and a second fixing panel, wherein the first fixing panel is fixed onto the platform of the sewing machine, having at least one guidance block and a lock hole, while the second fixing panel is assembled for the line shearing group, and correspondingly disposed on the first fixing panel. The second fixing panel is equipped with a guidance slot, for correspondingly accommodating the guidance block of the firstfixed panel, regulating holes corresponding to position and number of locking holes of the first fixing panel are disposed on the second fixing panel. Thus, the line shearing group is fixed onto the second fixing panel before leaving the factory, and the assembler only need to determine the position for disposing the first fixing panel on the sewing machine platform to fix the second fixing panelequipped with the line shearing group onto the first fixing panel without any operation of assembling or disassembling the line shearing group.

Description

technical field [0001] The invention relates to a lower thread cutter of a sewing machine. Background technique [0002] The lower thread cutter of the existing sewing machine has a fixing plate, which is fixed with the bed of the sewing machine, and is used for assembly and positioning of the thread cutting group. The thread cutting group has a mounting plate, and the mounting plate is fixed on the fixing plate. And a sliding guide is set on the mounting plate, the front end of the sliding guide is provided with a movable cutter, and the mounting plate, sliding guide and movable cutter are linked with a linked swing arm, and the linked swing arm Swing driven by solenoid valve. In this way, when the solenoid valve drives the linked swing arm to move, the linked swing arm will drive the mounting plate, the slide guide and the movable cutter to perform deflecting, moving, thread hooking and thread cutting actions. [0003] When this existing lower thread cutter structure is ...

AI Technical Summary

Problems solved by technology

[0003] When this existing lower thread cutter structure is installed on the bed of the sewing machine, the parts on the thread trimmer must first be removed from the fixing plate to prevent the locking holes on the fixing plate from being cut. The parts on the thread group are covered and cannot be assembled. After the fixed plate is locked on the bed, the thread trimmer is reinstalled on the fixed plate, and the reassembled thread trimmer must be re-calibrated to ensure The thread trimming group can actually perform the action of hooking and trimming the thread, but this situation causes inconvenience and trouble for the assembler when assembling

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