| 摘要 |
In a pattern cam selecting device of a sewing machine having a plurality of stacked pattern cams, a swingable element is provided, which can be moved in one direction to disengage a cam follower from one of the stacked pattern cams. The cam selecting device further includes a locking element, a clutch mechanism, and actuating mechanism, and a cam rotated upon the rotation of a main shaft of the sewing machine. The swingable element is locked in the follower-disengaging position by the locking element while clutch mechanism is held in an inoperative position by a holding element. The locking element which normally engages the actuating mechanism includes a follower element which is held in a position out of a rotation path of the cam. The locking element releases the actuating mechanism to allow the follower element to come into the rotation path of the cam when the locking element is operated to lock the swingable element while the clutch means is operated in association with the movement of the actuating mechanism to move to an operative position. The clutch mechanism is operated to cause the locking element to unlock the swingable element as the cam starts to rotate and moves the follower element toward the position out of the rotation path of the cam.
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