| 摘要 |
An upper looper control mechanism for sewing machines includes a control member and an end member connected between an active shaft for driving the upper looper and a connection member which is connected with the upper looper. The control member has one end connected to the active shaft or the connection member, and the other end of the control member is connected to a fixed part of the sewing machine. The users operate the control member to transfer the power of the active shaft to the connection member or to disengage the power of the active shaft from the connection member, so as to activate the upper looper or to stop the upper looper.
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