| 摘要 |
PURPOSE: A sewing machine and a needle switching device suitable for thereof are provided to transfer a pair of a spool base supporting a pair of a spool corresponding to a pair of a needle bar by a one control screw. CONSTITUTION: A sewing machine comprises a table, a support post, a upper beam, a head unit, and a bed unit. The head unit is fixed to an upper beam. A head unit rotating means and a needle bar driving means are formed in the head unit. The head unit rotating means circulates a sewing head within a fixed range. The bed part is installed at a lower part of the head unit. The bed part comprises a bed part rotating means and a pair of a spool. The bed part rotating means circulates a sewing bed within a fixed range. A pair of the spool corresponds to a pair of needle bar driving means.
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