| 摘要 |
Provided is a sewing machine (1) in which a contact member (61) that is in contact with a needle bar (30) when the needle bar (30) is released from connection with a drive source is not in contact with the needle bar (30) when the needle bar (30) is connected to the drive source and made to move vertically. A sector gear (130) is rotated by the driving force of a pulse motor (120). A needle bar release mechanism (50), a switching mechanism (60), and a thread removal mechanism (70) are driven by a cam mechanism and a crank mechanism. While in a connected state, a disconnected state, or a disconnection transition state, the contact member (61) of the switching mechanism (60) is positioned in a first position by a tension spring (68). When the sector gear (130) rotates while in a connection transition state, a second link rod (150) provided with a cam follower (152) for engaging with a groove cam (135) drives the switching mechanism (60) and moves the contact member (61) to a second position. When the needle bar (30) is positioned at top dead center, the contact member (61) is contact with the needle bar (30) while in the second position and not in contact with the needle bar (30) while in the first position. |
