Sewing machine

Abstract

The invention provides a sewing machine (100) including: a middle presser foot (29) pressing a sewing article on the needle plate for avoiding by the way of ascending together with the sewing article kept on the needle plate and the machine needle; a lower position height adjustment mechanism (H1) for adjusting the lower position height of the middle presser foot (29); a sewing pattern preselecting mechanism (200) for preselecting the sewing pattern by the user's input; a lower position height preselecting mechanism (200) for preselecting the lower position height of the middle presser foot (29) by driving the lower position height adjustment mechanism (H1) of the user's input. The sewing machine (100) is sewing based on sewing pattern preselecting mechanism (200) and the sewing pattern preselected by the lower position height preselecting mechanism (200) and the lower position height of the middle presser foot (29), in which, with the lower position height preselecting request mechanism (200), when the sewing pattern is preselected by the sewing pattern preselecting mechanism (200), the lower position height of the middle presser foot (29) is preselected by the lower position height preselecting mechanism (200).

Description

technical field [0001] The present invention relates to a sewing machine provided with an intermediate presser device. Background technique [0002] Conventionally, in a sewing machine with a frame-shaped clamp, in order to prevent the object to be sewn from rising together with the needle due to friction with the needle and shaking, there is a needle penetration portion that presses the fabric downward when the needle is raised. middle presser device. [0003] The intermediate presser device makes the intermediate presser rise together with the needle after the needle is fully lifted from the fabric. [0004] In such an intermediate presser device, the height (lower position height) of the bottom dead center of the vertical motion path of the intermediate presser from the upper surface of the needle plate can be adjusted so as to be able to cope with various thicknesses of fabrics (for example, refer to Patent Document 1). . [0005] Usually, the height of the lower posi...

AI Technical Summary

Problems solved by technology

[0007] However, in conventional sewing machines, the setting of the height of the lower position of the intermediate presser foot is set separately from the setting of the sewing pattern, so when the user completes the setting of the sewing pattern, he sometimes forgets to The setting of the height of the lower position, or mistakenly think that it is over, start sewing directly without setting the height of the lower position

[0008] In such a case, if the lower end of the intermediate presser foot is in contact with the upper surface of the needle plate and sewing is carried out as it is, the fabric may be damaged by pressing the material too much, or excessive pressure on the intermediate presser foot may occur. Deformation or breakage due to heavy load

In addition, even when there is a slight gap between the intermediate presser foot and the needle plate, if the gap is not correct, the fabric will float and skip stitches will occur, which will reduce the quality of the sewn product.

[0009] In addition, the operator must always pay attention so as not to forget the setting of the height of the lower position, which causes an unnecessary burden on the operator and reduces the operability.

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