Abstract: Provided are a pulse wave signal analyzer and an analysis method capable of determining a state of atrial fibrillation. The analyzer comprises a pulse wave detection unit for non-invasively detecting a pulse wave signal according to heartbeat of a living body; a spectrum generation unit for generating a frequency spectrum by Fourier transforming signal detected by the pulse wave detection unit; and an atrial fibrillation detection unit for detecting a state of atrial fibrillation based on the frequency spectrum generated by the spectrum generation unit. The spectrum generation unit repeatedly performs Fourier transform of the pulse wave signal at a predetermined time frame while shifting the time frame in a range of 0.005 to 0.02 seconds. The analyzer further comprises a filter for filtering the signal detected by the pulse wave detection unit, and the spectrum generation unit generates the frequency spectrum from signal output from the filter.

Abstract: A needle bar case has a plurality of needle bars. As a main shaft is rotated by a main shaft motor (first drive source), the needle bars are driven in an up-down direction so that a sewing operation is carried out in a conventionally-known manner. Ascending/descending bars are supported on the needle bar case in corresponding relation to the needle bars, and each of the ascending/descending bars is driven in the up-down direction by a motor (second drive source). A cord guide member for guiding a cord material onto a workpiece is mounted to the lower end of any of the ascending/descending bars, in place of a conventional presser foot. Cord sewing or loop sewing of cord material can be performed selectively by changing an ascending/descending stroke of the ascending/descending bar. Thus, cord sewing and loop sewing of the chord material can be performed selectively with a simple construction.

Abstract: A needle bar case has a plurality of needle bars. As a main shaft is rotated by a main shaft motor (first drive source), the needle bars are driven in an up-down direction so that a sewing operation is carried out in a conventionally-known manner. Ascending/descending bars are supported on the needle bar case in corresponding relation to the needle bars, and each of the ascending/descending bars is driven in the up-down direction by a motor (second drive source). A cord guide member for guiding a cord material onto a workpiece is mounted to the lower end of any of the ascending/descending bars, in place of a conventional presser foot. Cord sewing or loop sewing of cord material can be performed selectively by changing an ascending/descending stroke of the ascending/descending bar. Thus, cord sewing and loop sewing of the chord material can be performed selectively with a simple construction.

Abstract: An inner rotary hook has a needle drop hole, and side wall portions formed over the drop hole and defining a space for passage therethrough of a sewing needle. The side wall portions are located adjacent to opposite sides of the needle passing through the space and extend from a region in front of the needle to a region behind the needle. The side wall portions can abut against an upper thread, passed through a hole of the needle, near a bottom dead point of the needle. If any of two portions of the thread located forward and rearward of the needle has strayed laterally, it can abut against one of the wall portions. Consequently, it is possible to prevent the front-side upper thread portion from circling around behind the needle, but also prevent the rear-side upper thread portion from straying laterally to form a laterally-protruding loop.

Abstract: An inner rotary hook has a needle drop hole, and side wall portions formed over the drop hole and defining a space for passage therethrough of a sewing needle. The side wall portions are located adjacent to opposite sides of the needle passing through the space and extend from a region in front of the needle to a region behind the needle. The side wall portions can abut against an upper thread, passed through a hole of the needle, near a bottom dead point of the needle. If any of two portions of the thread located forward and rearward of the needle has strayed laterally, it can abut against one of the wall portions. Consequently, it is possible to prevent the front-side upper thread portion from circling around behind the needle, but also prevent the rear-side upper thread portion from straying laterally to form a laterally-protruding loop.