摘要 |
<p>[Problem] In relation to a sewing machine having a function of rotating a sewing needle in order to prevent occurrence of hitch stitches, there are provided a needle bar that obviates a necessity for an additional rotation mechanism for rotating the sewing needle; that facilitates attachment and replacement of the needle bar; that allows the sewing needle to make smooth rotation easily; and that is easily applied to existing sewing machines, as well as a sewing machine equipped with the needle bar. [Means for Solution] A needle bar 5 includes: a needle bar body 10 having a vertically-movable sleeve 12 and a guide bush 14; a sleeve 20 provided in the needle bar body 10 and having openings 20a, and the like, where balls 22 are to be placed; a cam shaft 30 that has a disc-shaped portion 32 which is provided in the needle bar body 10, an upper shaft 34 which is provided with a pair of grooves 36a or the like having helical grooves and which is inserted in the sleeve 20, and a lower shaft 38 which is formed so as to protrude downward from a guide bush 14; and a joint 50 secured to the lower shaft 38 for securing a sewing needle 60.</p> |