Stitch adjustment locking device and sewing machine

Abstract

The invention discloses a needle pitch adjusting and locking device which comprises a stud, a knob base, a feeding pitch knob, a button, a limiting piece, a clamping spring and a spring. The knob base is arranged on the outer side of the stud in a sleeved manner and fixedly connected with the head of a sewing machine, the feeding pitch knob is fixedly connected with the stud through a screw, the button comprises a head portion and a connecting rod, the limiting piece, the clamping spring and the spring are arranged on the connecting rod in a sleeved manner, the feeding pitch knob comprises a connecting ring sleeving the stud and a handle ring provided with a button sliding groove, the connecting ring and the handle ring are fixedly connected and coaxially arranged, the head portion and the button sliding groove are in slidable fit, a clamping spring groove is formed in the connecting rod arranged on the undersurface of the head portion, width of the limiting piece is larger than that of the head portion, one end, extending into the knob base, of the limiting piece is abutted against and positioned with the knob base under the action of the spring arranged between the limiting piece and the connecting ring, the clamping spring arranged in the clamping spring groove is positioned between two adjacent circles of the spring, and width of the clamping spring is smaller than outer diameter of the spring. The needle pitch adjusting and locking device is simple to use, and the problem of failing of a locking function due to wearing is solved. The invention further provides the sewing machine.

Description

technical field [0001] The invention relates to the technical field of sewing machines, more specifically, to a stitch length adjusting and locking device, and also to a sewing machine. Background technique [0002] Such as figure 1 with figure 2 As shown in , in the existing sewing machine, the needle distance adjustment locking device includes a feeding adjustment stud 02, a feeding distance locking spring 03, a stop pin 04, a needle distance button spring 05, a button 06, a feeding distance knob 07 and a screw 08. The feeding adjustment stud 02 is connected with the needle pitch adjustment mechanism in the sewing machine head 01, and an internal thread hole cooperating with the screw 8 is arranged in the center thereof. The needle distance button spring 05, the button 06 and the feed distance knob 07 are sleeved on the feed adjustment stud 02 in turn, and fixed with the screw 08. The sewing machine head 01 is also provided with an installation hole for installing the ...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a stitch length adjustment locking device for sewing machines to solve the problem that the existing device is prone to wear and tear to cause the locking function to fail, and the use method is cumbersome

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