US 11,384,461 B2Granted

Sewing machine

AssigneeJanome Sewing Machine Co., Ltd.

InventorsYumiko Kambara, Yoshitaka Bamba, Jun Mafune

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Abstract

In a sewing machine, a plurality of needle plate holes are formed in a needle plate. The needle plate holes are arranged at positions respectively corresponding to a plurality of blade-side rotation positions of a cutwork blade. In this manner, the needle plate hole is formed in a shape corresponding to a shape of a blade portion, and a direction of the needle plate hole can match a direction of the blade portion that is arranged above to face the needle plate hole. Specifically, a linear hole-side cutting surface corresponding to a blade-side cutting surface of the blade portion is formed in the needle plate hole, and the blade-side cutting surface and the hole-side cutting surface can be arranged to face each other in a direction orthogonal to both the surfaces in a plan view.

Claims6

Dependent claims

A sewing machine comprising:

a rotation mechanism configured to include
a base attached to a lower end portion of a needle bar that is moved up and down, and
a rotation body connected to the base to be rotatable around an axis of the needle bar;
a cutwork blade which is provided on the rotation body, and extends downward from the rotation body;
and
a needle plate which is provided below the rotation mechanism, and has a needle plate hole for cutting a cutting target object in cooperation with a blade portion of the cutwork blade when the blade portion is inserted into the needle plate hole,
wherein:
the blade portion of the cutwork blade has a blade-side cutting surface, and the needle plate hole has a hole-side cutting surface corresponding to the blade-side cutting surface:
an axis line of the cutwork blade moves along a rotating direction of the rotation body with respect to the needle plate hole;
and
the blade portion is inserted into the needle plate hole in a state where the hole-side cutting surface of the needle plate hole fits the blade-side cutting surface of the blade portion of the cutwork blade.

8 more elements

Dependencies are inferred from the claim text.