A hopping foot assembly for a sewing machine having a needle comprises a hopping foot base and a hopping foot arm. The hopping foot base is shaped to include a needle opening that extends axially therethrough relative to an axis. The hopping foot arm extends from the hopping foot base. The hopping foot arm is configured to be coupled to the sewing machine to fix the hopping foot base relative to the sewing machine.

Provided with a cloth movement detection device and a sewing machine capable of precisely detecting a movement of a cloth. A cloth movement detection device includes: a light detection portion configured to detect a light for detecting a movement of a cloth; a body portion configured to be detachably attached to a presser bar of a sewing machine, the light detection portion being installed in the body portion; and a pressing support portion configured to be detachably attached to the body portion, a cloth pressing portion capable of contacting with the cloth being formed on the pressing support portion, wherein a window portion capable of transmitting the light is provided on a bottom surface of the body portion, and the cloth pressing portion is located lower than the bottom surface of the body portion in a state that the pressing support portion is attached to the body portion.

Sewing machine ankle assemblies having a resilient member for attaching a presser foot are disclosed. According to an aspect, a sewing machine ankle assembly includes an ankle comprising an upper portion and a lower portion. The lower portion defines at least one structure configured to receive an attachment mechanism of the presser foot. The sewing machine ankle assembly also includes a resilient member comprising an upper end and an opposing lower end. The upper end is attached to the upper portion of the ankle. The lower end is positioned beneath a portion of the attachment mechanism of the presser foot when the attachment mechanism is received by the at least one structure of the ankle such that the lower portion of the resilient member exerts a force on the portion of the attachment mechanism in a direction towards the at least one structure of the ankle.

Sewing machine ankle assemblies having a resilient member for attaching a presser foot are disclosed. According to an aspect, a sewing machine ankle assembly includes an ankle comprising an upper portion and a lower portion. The lower portion defines at least one structure configured to receive an attachment mechanism of the presser foot. The sewing machine ankle assembly also includes a resilient member comprising an upper end and an opposing lower end. The upper end is attached to the upper portion of the ankle. The lower end is positioned beneath a portion of the attachment mechanism of the presser foot when the attachment mechanism is received by the at least one structure of the ankle such that the lower portion of the resilient member exerts a force on the portion of the attachment mechanism in a direction towards the at least one structure of the ankle.

A presser foot device includes a wall portion, a pair of opposed portions, a pin, and an abutting portion. The wall portion extends in a first direction and a second direction intersecting the first direction. The pair of opposed portions extend in one direction of a third direction intersecting the first direction and the second direction from the wall portion, and face each other. The pin extends in the second direction between the pair of opposed portions, and engages with a groove provided in the presser foot holder. The abutting portion is provided with respect to the pin on one direction side of the first direction, and is provided on the one direction side of the third direction of an end surface in the one direction of the third direction, of the pair of opposed portions. The abutting portion abuts against the pressor foot holder in the second direction.

A sewing machine includes an upper feed mechanism, a presser foot mechanism and a control device. The upper feed mechanism feeds a workpiece on a throat plate from above by an upper feed dog. The presser foot mechanism includes a presser foot for pressing the workpiece on the throat plate from above. The control device controls a driving source of the presser foot mechanism. The upper feed mechanism supports the upper feed dog to be vertically movable between an upper retreat position and a lower feed position. The upper feed mechanism includes a detection unit that detects a downward movement of the upper feed dog from the retreat position. The control device controls the driving source to pull the presser foot upward by a detection of the detection unit.

A sewing machine includes an upper feed mechanism, a presser foot mechanism and a control device. The upper feed mechanism feeds a workpiece on a throat plate from above by an upper feed dog. The presser foot mechanism includes a presser foot for pressing the workpiece on the throat plate from above. The control device controls a driving source of the presser foot mechanism. The upper feed mechanism supports the upper feed dog to be vertically movable between an upper retreat position and a lower feed position. The upper feed mechanism includes a detection unit that detects a downward movement of the upper feed dog from the retreat position. The control device controls the driving source to pull the presser foot upward by a detection of the detection unit.

A sewing machine, in which a presser foot and a throat plate are detachable, includes a feed dog bracket, a feeding dog and a mounting portion. The feed dog bracket is driven according to a transfer direction of a fabric. The feeding dog transfers the fabric on the throat plate. The mounting portion detachably mounts the feeding dog on the feed dog bracket. The feeding dog includes a cam portion which is mounted on the mounting portion. The cam portion includes first, second and third cam surfaces. The first cam surface has a surface-contact with a first receiving surface of the mounting portion. The second cam surface has a line-contact with an end portion of a second receiving surface of the mounting portion. The third cam surface is pressed by a pressing member of the mounting portion.

A sewing machine, in which a presser foot and a throat plate are detachable, includes a feed dog bracket, a feeding dog and a mounting portion. The feed dog bracket is driven according to a transfer direction of a fabric. The feeding dog transfers the fabric on the throat plate. The mounting portion detachably mounts the feeding dog on the feed dog bracket. The feeding dog includes a cam portion which is mounted on the mounting portion. The cam portion includes first, second and third cam surfaces. The first cam surface has a surface-contact with a first receiving surface of the mounting portion. The second cam surface has a line-contact with an end portion of a second receiving surface of the mounting portion. The third cam surface is pressed by a pressing member of the mounting portion.

A hopping foot assembly for a sewing machine having a needle comprises a hopping foot base and a hopping foot arm. The hopping foot base is shaped to include a needle opening that extends axially therethrough relative to an axis. The hopping foot arm extends from the hopping foot base. The hopping foot arm is configured to be coupled to the sewing machine to fix the hopping foot base relative to the sewing machine.