| 摘要 |
An upper decorative stitching device is designed to make it possible to precisely transmit the swing movement of a first lever which is capable of swing movements widthwise in a pendulum manner to horizontal reciprocating motion of a second lever, which is provided with a spreader. The device facilitates the operation of switching between an upper decorative stitching and no upper decorative stitching. A connecting rod ( 9 ) is provided at both ends with spherical bearings ( 10, 11 ) to provide a connection between the first lever ( 3 ) and the second lever ( 8 ), thereby converting the rotation of the upper shaft into the reciprocal movement of the spreader.
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