| 摘要 |
A bobbin thread holder of a sewing machine is provided to perform the next sewing work after the cutting the bobbin thread, thereby enhancing the sewing quality. A bobbin case(51) receives a bobbin(56) including a wound bottom thread(D). A medium-sized bobbin case(52) rotates around the bobbin case. A driver(53) transmits the driving force from the bobbin shaft to the midium-sized bobbin case. A large-sized bobbin case(54) maintains the medium-sized bobbin case at the inside thereof. A medium-sized bobbin case presser(55) maintains the medium-sized bobbin case at the inside of the large-sized bobbin case.
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