LOCKING DEVICE OF BOBBIN CASE

PROBLEM TO BE SOLVED: To provide a locking device of a bobbin case in which the bobbin case is fixed within a bobbin support body, the bobbin case can be taken out without operating a locking means, and further a bobbin or the bobbin case is pressed from a bobbin support body to an axial direction after releasing locking. SOLUTION: In the locking device of the bobbin case 5 for the bobbin within the bobbin support body 1 of a sewing machine which includes a storage part in the bobbin support body 1 for holding the bobbin or the bobbin case 5 and the locking means which locks the bobbin case 5 or the bobbin in the bobbin support body 1 and a center axis, the locking means has a groove 21 formed in the center axis in the bobbin support body 1 and a coil spring 17, which energizes the bobbin case 5 from the lower part in a state that the bobbin case 5 is held, is formed between the upper end part of the center axis and the bobbin case 5. COPYRIGHT: (C)2010,JPO&INPIT