Abstract: A needle bar thread guide for a sewing machine includes a thread guide body mounted on a needle bar and having a threading portion for threading the sewing machine, an introducing portion formed on the thread guide body for introducing a needle thread to the threading portion, and a fall-off preventing member disposed at a position near to spaces over and below the thread guide body. The fall-off preventing member allows the needle thread to be introduced via the introducing portion to the threading portion and prevents the needle thread introduced to the threading portion from falling off from the introducing portion.

Abstract: A sewing machine includes a plurality of thread hooking sections including a thread take-up lever and a thread tension regulator, and a thread guide thread hook mechanism having a thread hook member which is moveable nearly parallel to the vertical surface from a stand-by position to a thread hooking position. The sewing machine is configured to hook the extent of the needle thread from a thread transferring member moved to the vicinity of the eye to the thread take-up lever to hook it onto the needle bar thread guide.

Abstract: A threader for a sewing machine includes a thread tension regulator, a thread take-up spring, a thread take-up lever, a thread transferee setting a needle thread drawn from a thread supply onto the thread tension regulator, the thread take-up spring and the thread take-up lever so that the thread tension regulator, the thread take-up spring and the thread take-up lever are threaded, a path forming member forming a guide path guiding the thread transferee so that the thread transferer is moved, a driving unit driving the thread transferer, and a drive transmitting member transmitting drive of the driving unit to the thread transferee.

Abstract: A sewing machine includes a needle bar holding a sewing needle having an eye hole, a needle threading mechanism including a threading hook passing a needle thread through the eye hole of the sewing needle, a presser bar with a presser foot attached to its lower end, a vertically moving mechanism vertically moving the presser bar, a drive mechanism driving the vertically moving mechanism, a threading operation unit operating the needle threading mechanism, and a drive mechanism controlling unit controlling the drive mechanism vertically moving the presser bar to a position where interference between the presser foot and threading hook is avoided when the needle threading operation unit is operated.

Abstract: A sewing machine includes a thread transferring mechanism automatically hooking onto thread hooking sections a needle thread which extends from a thread supply and which is retained in a predetermined thread preparatory path while retaining the needle thread so that the needle thread can be turned over to a needle threading mechanism, and a control unit which controls a thread tension adjusting unit so that tension applied to the needle thread becomes a predetermined tension that correlates with a transfer position of the needle thread transferred by the thread transferring mechanism.

Abstract: A sewing machine includes a needle bar reciprocally movable up and down, a thread take-up lever reciprocally swingable up and down, a thread supply which supplies a needle thread to the needle bar carrying the sewing needle, a plurality of thread guides including the thread take-up lever, an automatic threading apparatus automatically carrying the needle thread extending from the thread supply and passing the needle thread through the thread guides including the thread take-up lever, a first preparatory path formed for threading so that the needle thread extending from the thread supply can be passed through the thread guides by the automatic threading apparatus, and a second preparatory path formed for threading so that the needle thread extending from the thread supply can manually be passed through the thread guides, The thread take-up lever is displaced within a range of reciprocal swing so that threading is possible for at least one of the first and second preparatory paths.