| 摘要 |
An under thread bobbin exchange device for an industrial embroidery machine or sewing machine of a type having a hook shaft adapted for driving a shuttle, includes a carriage having at least two coupling shafts in parallel disposition to the hook shaft, each of said coupling shafts having a hook shaft distal end and a hook shaft proximal end, with the hook shaft proximal end capable of being coupled to the hook shaft such that the carriage is positioned at a right angle to the hook shaft when the hook shaft is at a standstill and capable to reciprocate in parallel disposition to a throat plate plane by the distance of the coupling shafts, and with each one of the hook shaft distal ends carrying a shuttle.
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