Structure for controlling multiple sewing actions by one motor and sewing machine

Abstract

The invention provides a structure for controlling multiple sewing actions by one motor, and particularly relates to the technical field of sewing machine manufacturing. The structure comprises a motor, a pressure foot lifting mechanism, a backstitch mechanism and a trimming mechanism. The motor comprises an electromagnet and / or relay, an encoder, a front output shaft and a rear output shaft, thefront output shaft of the motor controls the trimming mechanism, the rear output shaft of the motor controls the pressure foot lifting mechanism and the backstitch mechanism, a pressure foot lifting cam and a backstitch cam are fixed to the rear output shaft, the rear output shaft of the motor penetrates through the electromagnet, a tangent curved rod is fixed to the front output shaft, the frontoutput shaft of the motor penetrates through the encoder, the rear output shaft of the motor repeatedly rotates clockwise and anti-clockwise in a corner to output power to realize the backstitch (stitch adjusting) action, and the trimming action of the front output shaft of the motor is realized in the corner through one clockwise rotation. The sewing actions of backstitch, pressure foot lifting and trimming are realized through the operation of the motor, so that the structure of the sewing machine is more compact, and the production cost of the sewing machine is greatly reduced.

Description

technical field [0001] The application consists of a structure and a sewing machine that controls multiple sewing actions by one motor, and specifically relates to the technical field of sewing machine manufacturing. Background technique [0002] Existing sewing machines basically control sewing actions such as reverse sewing, presser foot and thread trimming through electromagnets, and the realization of each function requires an electromagnet or a motor to control. At present, there is a function of controlling the presser foot, thread trimming and reverse stitching (needle pitch adjustment) through a stepping motor in the market. One of the stepping motors controls the thread trimming and lifting the presser foot through forward and reverse rotation, and the other motor independently Control reverse stitching (adjust stitch distance). This kind of sewing machine needs to be installed with two stepping motors to control the reverse sewing, presser foot, and thread trimmin...

AI Technical Summary

Problems solved by technology

[0003] In view of the defects of high cost and complex production in the above-mentioned sewing machine technology, a structure of multiple sewing actions controlled by one motor is proposed in the present application, which is characterized in that it includes a motor, a presser foot lifting mechanism, a reverse sewing mechanism and a thread trimming mechanism, The motor includes an electromagnet and an encoder, the motor has a front output shaft and a rear output shaft, an electromagnet is installed on the rear end cover of the motor, and the electromagnet is connected with a sliding pin. There are presser foot lifting cam and reverse stitching cam fixed on the rear output shaft

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