Button fastening machine and stitch length adjusting and control mechanism thereof

Abstract

The invention discloses a button fastening machine and a stitch length adjusting and control mechanism thereof. The button fastening machine comprises a housing, a feeding adjusting plate, an adjusting handle and a fastener. Scales and a sliding groove are formed in a surface of the feeding adjusting plate; one end of the adjusting handle is used for being connected to a feeding sliding plate, theother end of the adjusting handle extends below the feeding adjusting plate, and an adjustment groove extending in the length direction of the adjusting handle is formed in the other end of the adjusting handle; the fastener includes an adjustment screw and a nut; a lower end of the adjustment screw passes through the adjustment groove and is slidingly connected to the adjustment groove, and an upper end of the adjustment screw passes through the adjustment groove and is screwed and fixed on the feeding adjusting plate through the nut; the nut is loosened to allow the adjusting handle and thefastener to move along the sliding groove to perform longitudinal feeding adjustment; the adjustment handle can be stopped at any position to achieve the linear adjustment range; when the adjusting handle moves to a designated scale, the nut is screwed tightly, and at this time, a horizontal right of the adjusting handle is fixed, the stitch length is fixed, and the adjusting handle can move backand forth along the axial portion of the adjustment screw, and a transmission requirement of vertical feeding is satisfied.

Description

technical field [0001] The invention relates to the technical field of sewing equipment, in particular to a needle distance regulating mechanism of a button sewing machine. In addition, the present invention also relates to a button sewing machine comprising the above-mentioned needle distance regulating mechanism. Background technique [0002] The button sewing machine is a special automatic sewing equipment, which is mainly used to complete the sewing of buttons with regular shapes. [0003] At present, the scale of the longitudinal feeding adjustment dial of the button sewing machine is increased from 0.5 mm to 4.5 mm. The adjustment handle is stuck in the dial slot under the action of the pre-tightening force. When using it, press the handle down and move the handle to different dials. In the card slot, the stitch length can be adjusted. However, for some irregular buttons such as buttonhole size 2.7, 3.2, etc., it is impossible to ensure that the needle is in the cent...

AI Technical Summary

Problems solved by technology

However, for some irregular buttons such as buttonhole size 2.7, 3.2, etc., it is impossible to ensure that the needle is in the center of the button, resulting in scratches on the needle and buttonhole, and poor stitching; in addition, the adjustment handle is stuck on the scale In the disc groove, there is a certain pre-tightening elastic force, which will increase the torque of the machine, or even get stuck. When the pre-tightening elastic force of the adjusting handle is not enough, the handle will move from the dial slot, which will cause the machine to break the needle.

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