Sewing machine
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United States of America Patent
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-
Mar 28, 2017
Issued Date -
N/A
app pub date -
Dec 1, 2014
filing date -
Jun 6, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A sewing machine includes an upper shaft rotatable so as to drive a needle bar, a lower shaft rotatable so as to drive a hook, an upper-shaft pulley attached to the upper shaft, a lower-shaft pulley attached to the lower shaft, a belt linking the upper-shaft pulley and the lower-shaft pulley, and synchronizing a rotation of the upper-shaft pulley and a rotation of the lower-shaft pulley with each other, a belt adjusting mechanism contacting the belt and changing a belt length at a tensioned side at which the belt is drawn, and a tensioner tensioning the belt in accordance with the change in the belt length of the belt at the tensioned side.
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Family
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