Rotary hook drive device and multi-head sewing machine
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United States of America Patent
Stats
-
Jan 17, 2012
Grant Date -
Dec 24, 2009
app pub date -
Jun 19, 2009
filing date -
Jun 20, 2008
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Rotary hook drive device for a sewing machine includes: a rotary hook rotatably provided on a rotary hook support; a cylindrical grooved cam provided on a drive shaft drivable to rotate in one direction; a cam follower engaged in a cam groove of the cylindrical grooved cam and capable of making reciprocative movement about a support shaft in response to rotation of the cylindrical grooved cam; and a transmission mechanism that transmits the reciprocative movement of the cam follower to the rotary hook to cause the rotary hook to make reciprocative pivoting movement. Such arrangements can prevent deviation in driving timing of the rotary hook and simplify the construction of the rotary hook drive device.
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Family
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Cited Art Landscape
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