A threading device of a sewing machine includes a flow path switching member, a base portion, and a plurality of thread introducing portions. The flow path switching member includes a gaseous body inlet portion for receiving a compressed gaseous body, a gaseous body outlet portion provided to communicate with the gaseous body inlet portion for exhausting the gaseous body, and a cylindrical outer surface portion at which the gaseous body outlet portion is opened. The base portion includes a cylindrical inner surface portion into which the cylindrical outer surface portion of the flow path switching member is inserted and for supporting the flow path switching member in a rotatable manner, and a plurality of flow paths formed to communicate with the cylindrical inner surface portion. The plurality of thread introducing portions are provided at the base portion to communicate with respective outlet sides of the plurality of flow paths.

A threading device of a sewing machine includes a flow path switching member, a base portion, and a plurality of thread introducing portions. The flow path switching member includes a gaseous body inlet portion for receiving a compressed gaseous body, a gaseous body outlet portion provided to communicate with the gaseous body inlet portion for exhausting the gaseous body, and a cylindrical outer surface portion at which the gaseous body outlet portion is opened. The base portion includes a cylindrical inner surface portion into which the cylindrical outer surface portion of the flow path switching member is inserted and for supporting the flow path switching member in a rotatable manner, and a plurality of flow paths formed to communicate with the cylindrical inner surface portion. The plurality of thread introducing portions are provided at the base portion to communicate with respective outlet sides of the plurality of flow paths.

The needle-threading device includes a needle-threading shaft that is parallel to a vertically-moving needle bar and that is vertically movable and rotatable, a control lever that lowers and rotates the needle-threading shaft, a needle-threading end section provided at a lower end of the needle-threading shaft and having a needle-threading hook, and a needle-threading stopper provided at the needle bar and defining a lowered stoppage position of the needle-threading shaft. The needle-threading end section lowered by operating the control lever rotates at the lowered stoppage position and causes the needle-threading hook to be inserted through a needle hole of one needle of a plurality of needles provided at the needle bar. The needle-threading end section includes a sliding body that vertically moves relative to the needle-threading shaft, a positioning body slidable relative to the sliding body, and an interlocking mechanism that vertically moves the sliding body.

The needle-threading device includes a needle-threading shaft that is parallel to a vertically-moving needle bar and that is vertically movable and rotatable, a control lever that lowers and rotates the needle-threading shaft, a needle-threading end section provided at a lower end of the needle-threading shaft and having a needle-threading hook, and a needle-threading stopper provided at the needle bar and defining a lowered stoppage position of the needle-threading shaft. The needle-threading end section lowered by operating the control lever rotates at the lowered stoppage position and causes the needle-threading hook to be inserted through a needle hole of one needle of a plurality of needles provided at the needle bar. The needle-threading end section includes a sliding body that vertically moves relative to the needle-threading shaft, a positioning body slidable relative to the sliding body, and an interlocking mechanism that vertically moves the sliding body.

A device for assisting with threading an eyed needle with the eye being of a type peripherally delimited by a rim extending substantially in a plane includes a solid body forming an eye receiving portion designed to receive the eye of the needle and to keep the needle in position in relation to the solid body. A passage in the solid body includes a guide portion that forms a first funnel for guiding the hook to bring the hook out of a retracted position and into a threading position. The guide portion also forms a second funnel for returning the hook to the retracted position from the threading position. Each time the hook transitions from and back to the retracted position, the hook moves through the eye of the needle, drawing the thread through the eye when the hook returns to the retracted position from the threading position.

A device for assisting with threading an eyed needle with the eye being of a type peripherally delimited by a rim extending substantially in a plane includes a solid body forming an eye receiving portion designed to receive the eye of the needle and to keep the needle in position in relation to the solid body. A passage in the solid body includes a guide portion that forms a first funnel for guiding the hook to bring the hook out of a retracted position and into a threading position. The guide portion also forms a second funnel for returning the hook to the retracted position from the threading position. Each time the hook transitions from and back to the retracted position, the hook moves through the eye of the needle, drawing the thread through the eye when the hook returns to the retracted position from the threading position.

A device for assisting with threading an eyed needle with the eye being of a type peripherally delimited by a rim extending substantially in a plane includes a solid body forming an eye receiving portion designed to receive the eye of the needle and to keep the needle in position in relation to the solid body. A passage in the solid body includes a guide portion that forms a first funnel for guiding the hook to bring the hook out of a retracted position and into a threading position. The guide portion also forms a second funnel for returning the hook to the retracted position from the threading position. Each time the hook transitions from and back to the retracted position, the hook moves through the eye of the needle, drawing the thread through the eye when the hook returns to the retracted position from the threading position.