Abrégé

The present invention relates to an eccentrically fully vertically rotating shuttle having: a structure in which a needle thread loop smoothly performs a jump rope exercise with respect to a bobbin case without being interrupted by a first and a second rotor in a state where a hook body is driven in a full rotation by the first and the second rotor of a driver rotated while having a rotation center axis line which is eccentric to a rotation center axis line of the hook body by less than 0.5 mm; and a structure in which only a lockstitch, which is a perfect stitch, is always implemented even though a fabric is moved forward or backward in all of directions of the hour hand of a clock when a needle plate is seen from above with reference to a needle plate hole, so that the shuttle is applicable to a sewing machine, a pattern sewing machine, an embroidery machine, a quilting machine, and the like.

Classes IPC  ?

• D05B 57/14 - Navettes avec crochets rotatifs
• D05B 57/26 - Porte-canettes ou boîtes à canetteProtection de porte-canettes ou de boîtes à canetteDispositifs d'évacuation de la canette
• D05B 55/14 - Commandes des barres à aiguilles
• D05B 75/04 - Châssis, socles, tables ou autres mobiliers conçus pour supporter les machines à coudre avec dispositifs pour amortir le bruit

Abrégé

The present invention relates to a setting structure for a lower thread supply device of a sewing machine, and a setting method, the structure allowing: a first index groove part (220) to be formed on the front surface of a power transmitting rotary part (200) in a circular shape at a predetermined radius from a center axis of the power transmitting rotary part (200); a second index groove part (781) to form a circular arc, at the same radius as that of the first index groove part (220) of the power transmitting rotary part (200), on the front surface of a non-cut region at the rear part of a bobbin case base (700); a housing (100) to be coupled to a main body of the sewing machine by means of a housing mounting bracket (130), wherein the housing mounting bracket (130) has a first slot hole (131) through which a bolt coupled to the main body of the sewing machine passes and a second slot hole (132) through which a bolt coupled to the housing (100) passes; and the first slot hole (131) and the second slot hole (132) to have a free space in which bolt movement is enabled within a predetermined range, such that, in a state in which the power transmitting rotary part (200) is mounted at a power shaft of the sewing machine, the position of the housing (100) is determined such that the first index groove part (220) of the power transmitting rotary part (200) and the second index groove part (781) of the bobbin case base (700) are connected so as to form a perfect circular shape, and then the bolt is fastened to the first slot hole (131) and the second slot hole (132) so as to fix the housing (100) to the main body of the sewing machine.

Classes IPC  ?

• D05B 59/02 - Dispositifs pour déterminer ou indiquer la longueur de fil restant encore sur la canette
• D05B 59/00 - Adaptations de dispositifs de bobinage de la canette ou de changement de canette des machines à coudreDispositifs indicateurs ou de commande associés à ces dispositifs

Abrégé

The present invention relates to a lockstitch lower thread supply device including a bobbin case base, the device comprising: a first oil supply hole (150) positioned to face a hook body guide rail (340)on an inner surface (152) of a housing (100) so as to supply a lubricant to the inner surface of the housing (100); and at least one second oil supply hole (350) passing through an inner surface of a hook body (300) through the inside of the hook body (300) from an outer surface of the hook body (300), wherein the lubricant is supplied through the first and the second oil hole such that the hook body (300), which rotates at a high speed between the inside of the fixed housing (100) and the outer peripheral surface of a fixed bobbin case base (700) in a sewing process, rotates without abrasion thereof.

Classes IPC  ?

• D05B 59/02 - Dispositifs pour déterminer ou indiquer la longueur de fil restant encore sur la canette
• D05B 71/00 - Dispositifs de lubrification ou de refroidissement pour machines à coudre

Abrégé

The present invention relates to a vertical full-rotation shuttle, which leads a feed-side string portion of a needle thread loop to be wound around and hooked to a bobbin thread from one side of a bobbin case to the other side thereof according to the rotation of a hook part, and leads a stitch-side string portion of a needle thread to the surface of the bobbin case at one side of the bobbin case, such that the feed-side string portion of the needle thread turns the bobbin thread around and the needle thread loop jumps over the bobbin case so as to form complete stitches.

Classes IPC  ?

• D05B 57/28 - Adaptations de canettes pour loger le fil du dessous
• D05B 57/10 - Navettes

Produits et services

Bobbin cases for sewing machine for household purposes; yarn feeding devices for sewing machine for household purposes; bobbins for sewing machine for household purposes; yarn feeding devices for sewing machine for industrial purposes; bobbins for sewing machine for industrial purposes; bobbin cases for sewing machine for industrial purposes; thread quantity sensing devices for sewing machine; sewing machines; bobbins for sewing machine.

Abrégé

The present invention relates to a lower thread supply apparatus in which, unlike existing methods, if a rotating hook (310) passes through and drags a "U" shaped loop of an upper thread made when a needle descends to the lowest point and rises during a sewing process, and the upper thread is hooked upward through thread take-up of the rising needle, an upper thread (a) at the front side from the perspective of the hook (310) is dragged by an upper thread hanging protrusion (820), passes through the front region of a cap (500) through thread take-up, and entwines around a lower thread to form a noose, and simultaneously an upper thread (b) at the rear side from the perspective of the hook (310) passes through the rear region of a hook body (300) and escapes from a gap between a power transfer protrusion part (210) and a power transfer protrusion reception part (320) to form a lower thread and a stitch, the lower thread supply apparatus being characterized in that the upper threads intersect in an "X" shape during a sewing process and are perfectly coupled with the lower thread; thereby, twisting of the upper threads does not occur unlike existing methods, and therefore stitches do not come undone and puckering is greatly reduced.

Classes IPC  ?

• D05B 59/02 - Dispositifs pour déterminer ou indiquer la longueur de fil restant encore sur la canette
• D05B 59/00 - Adaptations de dispositifs de bobinage de la canette ou de changement de canette des machines à coudreDispositifs indicateurs ou de commande associés à ces dispositifs