Embroidery frame attachment/detachment device and embroidery sewing machine provided with same

An embroidery frame driving device to and from which an embroidery frame is attachable and detachable, the embroidery frame driving device comprising:

• a base plate that is firmly fixed to an X-Y driving unit of the embroidery frame driving device;
• a fixation arm that is pivotally supported by a shaft provided in the base plate;
• a substantially triangular attachment/detachment cam that is pivotally supported by the base plate;
• a removing link that is pivotally supported by the base plate;
• and
• a coupling link that couples one end of the removing link and a cam partial piece portion of the attachment/detachment cam to each other, wherein
• the embroidery frame includes a fixation groove that is pressed and fixed by one end of the fixation arm and a fixation part having a pressing part formed at a tip thereof,
• the embroidery frame is slid against the base plate to rotate the attachment/detachment cam through pressing of the pressing part of the fixation part to rotate the fixation arm via the other end of the fixation arm and press and fix the one end of the fixation arm to the fixation groove of the fixation part in attachment of the embroidery frame, and
• the removing link is operated to rotate the attachment/detachment cam via the coupling link and the cam partial piece portion to rotate the fixation arm and release pressing and fixation of the fixation groove of the fixation part by the one end of the fixation arm in detachment of the embroidery frame.