Sewing machine

Abstract

A sewing machine includes a plurality of types of embroidery frames having respective holding parts holding workpiece cloth, the holding parts having forms differing from one type of embroidery frame to another, a carriage to which one of the embroidery frames is selectively attached, the carriage being configured to transfer the embroidery frame, a projector configured to project an image onto the workpiece cloth, a detector configured to detect a type of the embroidery frame attached to the carriage, a storage unit configured to store frame information set for every type of embroidery frame, a setting unit configured to read the frame information according to result of detection by the detector and to set a projection region for an image to be projected, based on the frame information, and a control unit configured to control the projector so that the projector projects the image onto the set projection region.

We claim: 
     
         1 . A sewing machine comprising:
 a plurality of types of embroidery frames having respective holding parts which hold a workpiece cloth, the holding parts having forms differing from one type of embroidery frame to another;   a carriage to which one of the embroidery frames is selectively attached, the carriage being configured to transfer the embroidery frame attached thereto;   a projector configured to project an image onto the workpiece cloth held on the holding part of the embroidery frame attached to the carriage;   a detector configured to detect a type of the embroidery frame attached to the carriage;   a storage unit configured to store frame information set for every type of embroidery frame;   a setting unit configured to read the frame information from the storage unit according to a result of detection by the detector and to set a projection region for an image to be projected by the projector, based on the frame information; and   a control unit configured to control the projector so that the projector projects the image onto the projection region set by the setting unit.   
     
     
         2 . The sewing machine according to  claim 1 , wherein:
 the frame information includes at least size data representing a size of a sewable region set inside each holding part and position data representing a position of the sewable region in an attached state where the embroidery frame is attached to the carriage; and   the setting unit is configured to set the projection region based on the size data and the position data.   
     
     
         3 . The sewing machine according to  claim 2 , wherein the image to be projected by the projector includes at least an image representing a desirable embroidery pattern selected by a user or an image representing the sewable region. 
     
     
         4 . The sewing machine according to  claim 3 , wherein the control unit is configured to control the projector so that the projector projects an outline of the projection region as the image representing the sewable region.