A sewing machine includes a feed dog partially protruding out up and down from a throat plate to feed a workpiece, a sewing needle configured to perform stitch points on the workpiece by moving up and down, and a shuttle configured to capture an upper thread passed through the sewing needle below the throat plate to be entwined with a lower thread. The feed dog includes a top plate having teeth formed on an upper surface thereof, and a support portion to which a feed operation relative to the top plate is input. The top plate includes an insertion hole that the sewing needle penetrates up and down, and a pair of wall portions extending in an up-and-down direction respectively on one side and another side in a feed direction of the workpiece relative to the insertion hole on a lower surface side of the top plate.

A sewing machine includes a feed dog partially protruding out up and down from a throat plate to feed a workpiece, a sewing needle configured to perform stitch points on the workpiece by moving up and down, and a shuttle configured to capture an upper thread passed through the sewing needle below the throat plate to be entwined with a lower thread. The feed dog includes a top plate having teeth formed on an upper surface thereof, and a support portion to which a feed operation relative to the top plate is input. The top plate includes an insertion hole that the sewing needle penetrates up and down, and a pair of wall portions extending in an up-and-down direction respectively on one side and another side in a feed direction of the workpiece relative to the insertion hole on a lower surface side of the top plate.

A suturing device is provided, including a needle and a shuttle. The needle has an elongated shape extending in a predetermined direction and is configured to hold a first thread-like member. The needle is reciprocally movable forward and backward in the predetermined direction and is rotatable about an axis extending in the predetermined direction. Rotation of the needle about the axis permitting the first thread-like member to cross the needle to form a loop in the first thread-like member. The shuttle includes a holding portion. The holding portion is configured to hold a second thread-like member. The shuttle is configured to permit the holding portion to pass through the loop.

A suturing device is provided, including a needle and a shuttle. The needle has an elongated shape extending in a predetermined direction and is configured to hold a first thread-like member. The needle is reciprocally movable forward and backward in the predetermined direction and is rotatable about an axis extending in the predetermined direction. Rotation of the needle about the axis permitting the first thread-like member to cross the needle to form a loop in the first thread-like member. The shuttle includes a holding portion. The holding portion is configured to hold a second thread-like member. The shuttle is configured to permit the holding portion to pass through the loop.

In a suturing device, a casing has an elongated shape extending in a longitudinal direction. A needle is positioned in the casing, is configured to hold a first thread-like member, and has a tip end reciprocally moving along a path extending between a first position and a second position positioned backward than the first position in the longitudinal direction. A depression is formed in a peripheral wall of the casing, is positioned between the first and second positions in the longitudinal direction, and is configured to expose the needle to an outside of the casing. The shuttle includes a holding portion configured to hold a second thread-like member. The shuttle is configured to move within the casing at a third position between the first position and the depression in the longitudinal direction to change relative position between the second thread-like member and a loop formed in the first thread-like member.

In a suturing device, a casing has an elongated shape extending in a longitudinal direction. A needle is positioned in the casing, is configured to hold a first thread-like member, and has a tip end reciprocally moving along a path extending between a first position and a second position positioned backward than the first position in the longitudinal direction. A depression is formed in a peripheral wall of the casing, is positioned between the first and second positions in the longitudinal direction, and is configured to expose the needle to an outside of the casing. The shuttle includes a holding portion configured to hold a second thread-like member. The shuttle is configured to move within the casing at a third position between the first position and the depression in the longitudinal direction to change relative position between the second thread-like member and a loop formed in the first thread-like member.

A lower thread supply device of a sewing machine includes a bobbin, a bobbin case, a magnetic force member, and a magnetic force change portion. The bobbin has a cylindrical portion for inserting into a spindle of a shuttle, a shuttle side flange portion, and a front surface side flange portion which is magnetic, and a lower thread is wound around an outer circumference of the cylindrical portion between the shuttle side flange portion and the front surface side flange portion. The bobbin case has a non-magnetic cover portion having a front surface side part and a side wall part, housing the bobbin and transmitting a magnetic force. The magnetic force member is arranged at the front surface side of the bobbin case and attracts the front surface side flange portion of the bobbin by a magnetic force via the bobbin case.

A lower thread supply device of a sewing machine includes a bobbin, a bobbin case, a magnetic force member, and a magnetic force change portion. The bobbin has a cylindrical portion for inserting into a spindle of a shuttle, a shuttle side flange portion, and a front surface side flange portion which is magnetic, and a lower thread is wound around an outer circumference of the cylindrical portion between the shuttle side flange portion and the front surface side flange portion. The bobbin case has a non-magnetic cover portion having a front surface side part and a side wall part, housing the bobbin and transmitting a magnetic force. The magnetic force member is arranged at the front surface side of the bobbin case and attracts the front surface side flange portion of the bobbin by a magnetic force via the bobbin case.

A lower thread supply device of a sewing machine includes a bobbin, a bobbin case, a magnetic force member, and a magnetic force change portion. The bobbin has a cylindrical portion for inserting into a spindle of a shuttle, a shuttle side flange portion, and a front surface side flange portion which is magnetic, and a lower thread is wound around an outer circumference of the cylindrical portion between the shuttle side flange portion and the front surface side flange portion. The bobbin case has a non-magnetic cover portion having a front surface side part and a side wall part, housing the bobbin and transmitting a magnetic force. The magnetic force member is arranged at the front surface side of the bobbin case and attracts the front surface side flange portion of the bobbin by a magnetic force via the bobbin case.

A lower thread supply device of a sewing machine includes a bobbin, a bobbin case, a magnetic force member, and a magnetic force change portion. The bobbin has a cylindrical portion for inserting into a spindle of a shuttle, a shuttle side flange portion, and a front surface side flange portion which is magnetic, and a lower thread is wound around an outer circumference of the cylindrical portion between the shuttle side flange portion and the front surface side flange portion. The bobbin case has a non-magnetic cover portion having a front surface side part and a side wall part, housing the bobbin and transmitting a magnetic force. The magnetic force member is arranged at the front surface side of the bobbin case and attracts the front surface side flange portion of the bobbin by a magnetic force via the bobbin case.