Sewing machine with improved thread cutting mechanism

A sewing machine and thread cutting technology, which is applied in the field of sewing machines, can solve the problems of shortening the thread quantity and unable to maintain the quantity, etc.
CN100363548CInactive Publication Date: 2008-01-23BROTHER KOGYO KK
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Patent Information

Authority / Receiving Office
CN Ā· China
Current Assignee / Owner
BROTHER KOGYO KK
Publication Date
2008-01-23
Estimated Expiration
Not applicable Ā· inactive patent

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Abstract

A sewing machine includes a needle plate having a needle hole through which a sewing needle is allowed to pass, a thread catcher reciprocally moved forward and backward below the needle plate and being elongated in a moving direction, the thread catcher having a frontward end with respect to a direction of forward movement of the thread catcher and including first and second generally hook-shaped catching portions, and a cutting blade located between the first and second catching portions at least during backward movement of the thread catcher to cut a thread caught between the first and second catching portions. The first catching portion is located nearer to the frontward end of the thread catcher than the second catching portion with respect to the moving direction of the thread catcher during forward movement of the thread catcher. The first catching portion is further spaced from and located nearer to the needle hole of the needle plate than the second catching portion with respect to a direction perpendicular to the moving direction of the thread catcher. The thread catcher is moved backward so that the thread caught between the first and second catching portions intersects the cutting blade.
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Description

technical field

[0001] The present invention relates to a sewing machine in which a thread to be cut by a cutting blade is hooked under a needle plate. Background technique

[0002] A conventional sewing machine includes a thread catcher arranged to reciprocate under a needle plate. The thread catcher is moved so that it passes through a loop, whereby the loop is separated by the thread catcher. The thread catcher catches the thread during its return movement. Move the snagged thread to the cutting blade for cutting. Japanese Patent No. 2871201 issued to the assignee of the present application discloses such a tangential method. In the above-mentioned conventional sewing machine, a movable blade 510 as a thread catcher and a fixed blade 520 include corresponding horizontally extending plate-shaped portions, as shown in FIG. 42 . The wires are separated by a stationary blade 520 . The thread amount of the thread end on the cloth side in the sewing bed depends on the posi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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