A sewing machine is provided, which has lower feed teeth which feed a sewing object by a lower feed drive mechanism having a lower drive shaft 92 as a drive source and upper feed teeth which are driven by an upper feed shaft that is coupled to and driven by the lower feed drive mechanism. The sewing machine is provided with an upper feed lower shaft 1 which is supported rotatably on a machine main body and is coupled to the lower feed drive mechanism, an upper feed coupling section which transmits movement of the upper feed lower shaft to the upper feed shaft, and a transmission control section which controls halting and restarting of transmission of movement of the upper feed lower shaft. The upper feed coupling section is held at a movement transmission halt position by operation of the transmission control section.

A sewing machine is provided, which has lower feed teeth which feed a sewing object by a lower feed drive mechanism having a lower drive shaft 92 as a drive source and upper feed teeth which are driven by an upper feed shaft that is coupled to and driven by the lower feed drive mechanism. The sewing machine is provided with an upper feed lower shaft 1 which is supported rotatably on a machine main body and is coupled to the lower feed drive mechanism, an upper feed coupling section which transmits movement of the upper feed lower shaft to the upper feed shaft, and a transmission control section which controls halting and restarting of transmission of movement of the upper feed lower shaft. The upper feed coupling section is held at a movement transmission halt position by operation of the transmission control section.

In a sewing machine, a switching mechanism is coupled to a slide arm of a transmission mechanism included in an upper feed mechanism. When the switching mechanism is operated, the slide arm is switched between a transmission state in which the driving force of a driving cam is transmitted to a feed link mechanism and a non-transmission state in which the driving force of the driving cam is not transmitted to the link mechanism 61. This allows the switching mechanism to switch the slide arm 60A to the non-transmission state. This allows the operation of the feed link mechanism to be suspended, and allows the upper-lower movement of an upper feed dog to be suspended. Accordingly, this contributes to a reduction in vibration and noise in the sewing machine.

In a sewing machine, a switching mechanism is coupled to a slide arm of a transmission mechanism included in an upper feed mechanism. When the switching mechanism is operated, the slide arm is switched between a transmission state in which the driving force of a driving cam is transmitted to a feed link mechanism and a non-transmission state in which the driving force of the driving cam is not transmitted to the link mechanism 61. This allows the switching mechanism to switch the slide arm 60A to the non-transmission state. This allows the operation of the feed link mechanism to be suspended, and allows the upper-lower movement of an upper feed dog to be suspended. Accordingly, this contributes to a reduction in vibration and noise in the sewing machine.

An exemplary sewing machine includes a sewing head, a needle bar holding a needle, a motor for moving the needle during a sewing operation, a user interface, a data gathering device, a data storage device, and a processor. The data gathering device gathers data related to at least one of the sewing machine, an environment surrounding the sewing machine, a sewing material, the sewing operation performed by the sewing machine, and one or more interactions of a user with the sewing machine. The data storage device stores gathered data and data related to a neural network. The processor processes the gathered data through the neural network to generate processed data. Based on the processed data, the processor controls at least one of the user interface, the data storage device, and the motor.

An exemplary sewing machine includes a sewing head, a needle bar holding a needle, a motor for moving the needle during a sewing operation, a user interface, a data gathering device, a data storage device, and a processor. The data gathering device gathers data related to at least one of the sewing machine, an environment surrounding the sewing machine, a sewing material, the sewing operation performed by the sewing machine, and one or more interactions of a user with the sewing machine. The data storage device stores gathered data and data related to a neural network. The processor processes the gathered data through the neural network to generate processed data. Based on the processed data, the processor controls at least one of the user interface, the data storage device, and the motor.

A needle bar mechanism includes a needle bar connecting stud, two needle bars, needle bar clutches, clutch levers, needle bar clutch stoppers, and deactivating members provided two by two at the stud; a slider configured to selectively collide with one clutch lever and one deactivating member at the time of lifting of the stud; and an interlocking mechanism configured to interlock the deactivating members such that the deactivating members move opposite to each other in an upper-to-lower direction. According to the needle bar mechanism, the slider comes, at the time of lifting of the stud, into collision with the clutch lever and the deactivating member, so that one needle bar clutch can be switched from a holding state to a release state by the stud while the other needle bar clutch is switched from the release state to the holding state by the stud.

A needle bar mechanism includes a needle bar connecting stud, two needle bars, needle bar clutches, clutch levers, needle bar clutch stoppers, and deactivating members provided two by two at the stud; a slider configured to selectively collide with one clutch lever and one deactivating member at the time of lifting of the stud; and an interlocking mechanism configured to interlock the deactivating members such that the deactivating members move opposite to each other in an upper-to-lower direction. According to the needle bar mechanism, the slider comes, at the time of lifting of the stud, into collision with the clutch lever and the deactivating member, so that one needle bar clutch can be switched from a holding state to a release state by the stud while the other needle bar clutch is switched from the release state to the holding state by the stud.

In a sewing machine, a switching mechanism is coupled to a slide arm of a transmission mechanism included in an upper feed mechanism. When the switching mechanism is operated, the slide arm is switched between a transmission state in which the driving force of a driving cam is transmitted to a feed link mechanism and a non-transmission state in which the driving force of the driving cam is not transmitted to the link mechanism 61. This allows the switching mechanism to switch the slide arm 60A to the non-transmission state. This allows the operation of the feed link mechanism to be suspended, and allows the upper-lower movement of an upper feed dog to be suspended. Accordingly, this contributes to a reduction in vibration and noise in the sewing machine.

In a sewing machine, a switching mechanism is coupled to a slide arm of a transmission mechanism included in an upper feed mechanism. When the switching mechanism is operated, the slide arm is switched between a transmission state in which the driving force of a driving cam is transmitted to a feed link mechanism and a non-transmission state in which the driving force of the driving cam is not transmitted to the link mechanism 61. This allows the switching mechanism to switch the slide arm 60A to the non-transmission state. This allows the operation of the feed link mechanism to be suspended, and allows the upper-lower movement of an upper feed dog to be suspended. Accordingly, this contributes to a reduction in vibration and noise in the sewing machine.