Sewing machine

Abstract

To provide a sewing machine which reduces labor in the assembly of a driving means for driving a thread cutter mechanism and a presser bar lifter mechanism, and brings about a reduction in cost, savings in space and an improvement in beauty. This sewing machine is equipped with: a sewing-machine head 1 which is composed of a sewing-machine bed 2, a sewing-machine vertical body 3 and a sewing-machine arm 4; the thread cutter mechanism 10; the presser bar lifter mechanism 30; and the driving means for driving both the mechanisms 10 and 30. A single stepping motor 6 is used as the driving means, and arranged near a rear side wall 3a of the body 3. The turning and driving force of the stepping motor 6 is transferred to the mechanisms 10 and 30 via a cam member, a thread-cutter coupling member and a presser-bar-lifter coupling member, so as to drive both the mechanisms 10 and 30.

Description

technical field [0001] The invention relates to a sewing machine with a thread cutting mechanism and a presser foot lifting mechanism. Background technique [0002] In recent years, there has been proposed a driving mechanism that has a thread cutting mechanism for cutting the thread after sewing and a presser foot lifting mechanism that lifts the presser foot and drives the two mechanisms respectively, and controls the driving mechanism and drives the sewing machine of the two mechanisms, and has been proposed. Practical. [0003] In the conventional device, separate driving mechanisms such as the solenoid for driving the thread trimming mechanism and the solenoid for driving the presser foot lifting mechanism were used to drive, so the number of parts was large and the cost was high, and the sewing machine was also large and heavy. As a result, women, who are the main operators of sewing factory owners, have become a burden. [0004] In addition, when these multiple driv...

AI Technical Summary

Problems solved by technology

[0003] In the conventional device, separate driving mechanisms such as the solenoid for driving the thread trimming mechanism and the solenoid for driving the presser foot lifting mechanism were used to drive, so the number of parts was large and the cost was high, and the sewing machine was also large and heavy. As a result, women who are the main operators of sewing factory owners have become a burden

[0004] In addition, when these multiple driving mechanisms are installed in a sewing machine having a relatively narrow sewing machine head represented by backtacking sewing machines, the needles are moved up and down for arrangement in the longitudinal body portion of the sewing machine and inside the sewing machine head. Spindle or various components, it requires extremely complicated operations

[0005] On the other hand, when the plurality of driving mechanisms are arranged outside the longitudinal body of the sewing machine, it is difficult to achieve space-saving of the sewing machine head depending on the arrangement space.

Moreover, if a plurality of driving mechanisms are arranged outside the longitudinal body of the sewing machine, the shape of the head of the sewing machine will be skewed due to space constraints, which will damage the appearance.

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