US 12,286,737 B2Granted

Needle plate construction for sewing machine and sewing machine

AssigneeTism Co., Ltd.

InventorsShinko Egami, Takahiro Yoshida, Tatsuya Yamashita

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Abstract

A needle plate has a needle hole and a guide hole communicating with the needle hole. The guide hole is located near a front side of a sewing machine and positionally deviated from an up-down movement trajectory of a sewing needle in a rotating direction of a rotary hook. The needle plate has a groove formed in front of the needle hole and extending from the guide hole in a direction opposite to the rotating direction of the rotary hook. While the groove is open upward and at its portion leading to the guide hole, the other portions of the groove are defined by a bottom surface and side walls. In a sewing operation, depending on a direction in which a member holding a sewing workpiece moves, the lower thread passes through the guide hole to be guided to the front of the needle hole via the groove.

Claims9

Dependent claims

A needle plate construction for a sewing machine, including a needle plate having a needle hole for passage therethrough of a sewing needle moving up and down, the needle plate construction characterized in that

the needle plate has a guide hole provided near a front surface of the sewing machine and in communication with the needle hole, the guide hole being located at a position deviated from an up-and-down movement trajectory of the sewing needle substantially in the rotating direction of a rotary hook of the sewing machine, and that
the needle plate has a groove portion provided in front of the needle hole and extending from the guide hole in a direction opposite to the rotating direction of the rotary hook, the groove portion opening upward and at a part thereof leading to the guide hole and having a bottom surface and side walls,
wherein a lower thread having moved out of the rotary hook to extend upward is guided to a front of the needle hole through the guide hole via the groove portion.

Dependencies are inferred from the claim text.