Patent ID: 11873591
Assignee: JANOME CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D | IPC D

Claim 0:
1. An embroidery unit attaching and detaching device enabling to detachably attach an embroidery unit to a sewing machine, comprising:
a lock mechanism configured to operate in association with a motion of the embroidery unit in an attaching direction to restrict the motion of the embroidery unit in a detaching direction with respect to the sewing machine;
a first recessed portion provided on one of the sewing machine and the embroidery unit; and
a first protruded portion provided on the other of the sewing machine and the embroidery unit;
a second recessed portion provided on one of the sewing machine and the embroidery unit;
a second protruded portion provided on the other of the sewing machine and the embroidery unit;
a third recessed portion provided on one of the sewing machine and the embroidery unit; and
a third protruded portion provided on the other of the sewing machine and the embroidery unit, wherein
the first recessed portion and the first protruded portion are configured to engage with each other, the second recessed portion and the second protruded portion are configured to engage with each other and the third recessed portion and the third protruded portion are configured to engage with each other to form a support mechanism for restricting a relative motion of the sewing machine and the embroidery unit in a vertical direction,
the first protruded portion and the second protruded portion are protruded in a front/rear direction of the sewing machine and movable in the front/rear direction, and
the third protruded portion is protruded in a left/right direction of the sewing machine.