| 摘要 |
In order to reduce the impact speed of a latch (4) of a needle (1) in back position by reducing the acceleration effect originating from a half stitch (19), the upward jaw slope (8) of the needle (1) is subdivided into different regions. A first section (12) ascends at a relatively large acute angle gamma of, for example, up to 20°, preferably 16°. Just after the half stitch (19) has contacted the inside (14) of the latch (4), said half stitch arrives on a second section (16) of the upward jaw slope (8). The second section (16) is a straight section which ascends at a smaller acute angle beta of, for example, only 14° or less. Consequently, an acceleration effect from the half stitch (19) on the latch (4) is avoided over a wide pivot range of said latch. Preferably, this acceleration-free pivot range is at least 90°, preferably greater than 110°.
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