Bottom thread stand structure and sewing machine

Abstract

The invention belongs to the technical field of sewing equipment and particularly relates to a bottom thread stand structure and a sewing machine. A bottom thread stand component and a driving springare disposed on a bottom thread stand mounting plate; the bottom thread stand component is slidably connected with the bottom thread stand mounting plate; one end of the driving spring is connected tothe bottom thread stand mounting plate, while the other end is abutted to the bottom thread stand component to generate outward push upon the bottom thread stand component; a bottom thread stand lever is arranged below the bottom thread stand component; one end of the bottom thread stand lever is slidably connected with the bottom thread stand mounting plate; a limiter is disposed on the bottom thread stand mounting plate between the bottom thread stand component and the bottom thread stand lever; one end of the limiter is connected with the bottom thread stand lever, while the other end is connected with the bottom thread stand component; one end of the limiter moves with the bottom thread stand lever so as to drive the limiter to rotate, thereby removing the positioning upon the bottomthread stand component; after the limited is returned, the other end of the limiter is connected to the corresponding part of the bottom thread stand component to arrive at positioning. The bottom thread stand structure and the sewing machine have good threading convenience and low production cost.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of sewing equipment, in particular to a bottom thread frame structure and a sewing machine. [0003] Background technique: [0004] The existing lower thread holder assembly is as follows (see figure 1 , 2 ): includes a slide bar seat 1, lower thread holder 2 and two slide bars 3. The bottom thread frame assembly is positioned at the inside during the sewing state, and when threading is required, it needs to be moved to the outside, and the threading hole 4 on the bottom thread frame assembly is moved to the outside to facilitate threading. The overall structure is relatively complicated and the cost is high. In order to ensure that the bottom thread frame assembly can be ejected smoothly, it is necessary to ensure the cooperation relationship between the two slide bars 3, the slide bar seat 1 and the bottom thread frame seat 2. Therefore, the precision requirements for the parts are relatively high...

AI Technical Summary

Problems solved by technology

The overall structure is relatively complicated and the cost is high. In order to ensure that the bottom thread frame assembly can be ejected smoothly, it is necessary to ensure the cooperation relationship between the two slide bars 3, the slide bar seat 1 and the bottom thread frame seat 2. Therefore, the precision requirements for the parts are relatively high. High, which increases the processing difficulty and processing cost

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