The method of trimming the thread and lifting the presser foot to adjust the stitch distance of the sewing machine
A technology for lifting the presser foot and adjusting the stitch distance, which is applied in the direction of sewing machine components, sewing machine control devices, sewing equipment, etc., can solve the problems of complex structure and low transmission efficiency, and achieve high transmission efficiency, simple and compact structure, and simplified structure. Effect
Active Publication Date: 2021-06-04
JACK SEWING MASCH CO LTD
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Problems solved by technology
This driving method has the disadvantages of complex structure and low transmission efficiency.
Method used
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[0051] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, not to limit the present invention.
[0052] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying Describes, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate in a specific orientation, and therefore should not be construed as limiting the inventio...
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The present invention relates to the technical field of sewing machines, in particular to a method for adjusting the stitch distance of a sewing machine by lifting the presser foot for thread trimming, which is mainly performed by driving the stitch distance adjustment mechanism through the stitch distance adjustment section of the stitch distance contour surface of the cam before sewing starts Needle pitch adjustment action to obtain the required initial stitch pitch value; after sewing is completed, the thread trimming mechanism can be driven by the thread trimming segment on the thread trimming profile surface of the cam to perform the thread trimming action, and then the thread trimming action can be performed by the first presser foot lifting profile surface of the cam The first presser foot lifter drives the presser foot lifter mechanism to perform the presser foot lifter action, or does not perform the thread trimming action, and the second presser foot lifter section drives the presser foot lifter mechanism to perform the presser foot lifter action through the presser foot lifter contour surface of the cam, or After the thread trimming action is completed, the machine does not perform the presser foot lifting action, and directly reverses and resets. A cam is driven by a power unit to realize the three functions of thread trimming, presser foot lifting and stitch distance adjustment, with simple structure and high transmission efficiency.
Description
technical field [0001] The invention relates to the technical field of sewing machines, in particular to a method for thread trimming and lifting of a presser foot of a sewing machine to adjust stitch distance. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the cloth to interweave or sew one or more layers of sewing materials. The sewing machine usually consists of four parts: feeding device, base, transmission and accessories. The movement of each mechanism is reasonably coordinated, and the cycle works to sew the sewing materials together. [0003] At present, the sewing machine will use the functions of automatic thread trimming, automatic presser foot lift and automatic stitch length adjustment during the sewing process. Commonly, two electromagnets with different powers are used to drive the thread trimming mechanism and the presser foot lifting mechanism respectively to realize the funct...
Claims
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IPC IPC(8): D05B27/22D05B29/02D05B69/02
CPCD05B27/22D05B29/02D05B69/02
Inventor 刘强管建平林晓晓
Owner JACK SEWING MASCH CO LTD