| 摘要 |
A spool capsule for a sewing machine for receiving a lower thread spool, having a concentrically disposed bore for mounting the spool capsule on a spool carrier pin, with a spring, serving as a locking device for axially retaining the spool capsule on the spool carrier pin, being inserted into a spool receiving space of the spool capsule. A section of the spring is constructed so that it is elastically displaceable radially, relative to the concentrically disposed bore, penetrating the bore in a manner analogous to a tendon. The locking device includes only a single movable element, which serves for both arresting the spool capsule on the pin of the spool and as an actuating device. This single element includes a spring, which is retained in a centrally-extending groove in a deepening of the spool capsule, and projects outwardly, at one point, through an opening in the surface of the spool capsule. The spring, preferably, has a round wire, which first extends through a multiple bending along the periphery of the central groove of the spool capsule and, then, in one section, tangentially traverses the bore in the spool capsule in order to subsequently exit though an opening partly beyond the surface of the spool capsule.
|
