Sewing machine

Abstract

A sewing machine includes a bed including a bed surface, a needle bar, a presser bar, a projector, and a controller. A movement detector is attachable to the presser bar. The controller is configured to perform a sewing control of, in a state where the movement detector is attached to the presser bar, controlling an up-down reciprocating speed of the needle bar based on a signal output from the movement detector. The signal corresponds to a movement amount of a sewing workpiece located in a detection region. The controller is configured to perform a projection of, during performing the sewing control, controlling the projector to project an image toward the bed surface.

What is claimed is: 
     
         1 . A sewing machine comprising:
 a bed including a bed surface;   a needle bar;   a presser bar to which a movement detector is attachable;   a projector; and   a controller configured to perform:
 a sewing control of, in a state where the movement detector is attached to the presser bar, controlling an up-down reciprocating speed of the needle bar based on a signal output from the movement detector, the signal corresponding to a movement amount of a sewing workpiece located in a detection region; and 
 a projection of, during performing the sewing control, controlling the projector to project an image toward the bed surface. 
   
     
     
         2 . The sewing machine according to  claim 1 , wherein the controller is configured to project the image including a guide pattern indicating a position of the detection region. 
     
     
         3 . The sewing machine according to  claim 1 , wherein the controller is configured to project the image including a guideline indicating a position of the detection region in a short direction of the bed surface, the guideline extending in a longitudinal direction of the bed surface. 
     
     
         4 . The sewing machine according to  claim 1 , wherein the controller is configured to project the image including a first guideline and a second guideline, the first guideline indicating a position of the detection region in a short direction of the bed surface, the first guideline extending in a longitudinal direction of the bed surface, the second guideline indicating a position of the detection region in the longitudinal direction of the bed surface, the second guideline extending in the short direction of the bed surface. 
     
     
         5 . The sewing machine according to  claim 1 , wherein the controller is configured to project the image including a guideline extending in a longitudinal direction of the bed surface at a position away from the detection region by a particular distance in a forward feed direction, the forward feed direction being a direction from the needle bar toward the presser bar, the forward feed direction being a direction along a short direction of the bed surface. 
     
     
         6 . The sewing machine according to  claim 1 , wherein the controller is configured to project the image including a first guideline and a second guideline, the first guideline extending in a longitudinal direction of the bed surface at a position away from the detection region by a particular distance in a forward feed direction, the second guideline extending in a short direction of the bed surface, the second guideline indicating a position of the detection region in the longitudinal direction of the bed surface, the forward feed direction being a direction from the needle bar toward the presser bar, the forward feed direction being a direction along the short direction of the bed surface. 
     
     
         7 . The sewing machine according to  claim 1 , wherein the controller is configured to project the image including an icon indicating an operating state of the sewing machine. 
     
     
         8 . The sewing machine according to  claim 7 , wherein the controller is configured to:
 in a case where the operating state of the sewing machine is a first operating state, project the image including the icon of a first color; and   in a case where the operating state of the sewing machine is a second operating state different from the first operating state, project the image including the icon of a second color different from the first color.   
     
     
         9 . The sewing machine according to  claim 7 , wherein the controller is configured to:
 in a case where the operating state of the sewing machine is a first operating state, project the image including a first icon; and   in a case where the operating state of the sewing machine is a second operating state different from the first operating state, project the image including a second icon having a different shape from the first icon.   
     
     
         10 . The sewing machine according to  claim 7 , wherein the controller is configured to:
 during a period in which movement of the sewing workpiece is being detected by the movement detector, project the image including the icon in a first mode; and   during a period in which movement of the sewing workpiece is not being detected by the movement detector, project the image including the icon in a second mode different from the first mode.   
     
     
         11 . The sewing machine according to  claim 3 , wherein the controller is configured to project the image including an auxiliary guideline to assist sewing, the auxiliary guideline being thinner than the guideline. 
     
     
         12 . The sewing machine according to  claim 3 , wherein the controller is configured to project the image including the guideline that is thicker than a length of the detection region in the short direction. 
     
     
         13 . The sewing machine according to  claim 2 , wherein the movement detector includes a presser foot configured to contact the sewing workpiece;
 wherein the projector is configured to project the image onto a projection region on the bed surface, the projection region being a region surrounding the presser foot of the movement detector attached to the presser bar; and   wherein the controller is configured to project the image including the guide pattern that is projected onto a particular region in the projection region, the particular region being a region excluding a region in which the presser foot attached to the movement detector is located.   
     
     
         14 . The sewing machine according to  claim 2 , wherein the movement detector includes a housing attachable to the presser bar;
 wherein the projector is configured to project the image onto a projection region on the bed surface, the projection region being a region surrounding the movement detector attached to the presser bar; and   wherein the controller is configured to project the image including the guide pattern that is projected onto a particular region in the projection region, the particular region being a region excluding a region in which the housing of the movement detector is located.   
     
     
         15 . The sewing machine according to  claim 2 , wherein the controller is configured to project the image including the guide pattern with a white outline. 
     
     
         16 . The sewing machine according to  claim 2 , wherein the controller is configured to project the image in which a position of the guide pattern is changed based on a thickness of the sewing workpiece. 
     
     
         17 . The sewing machine according to  claim 1 , wherein the movement detector includes a sensor configured to detect the movement amount of the sewing workpiece located in the detection region; and
 wherein the sensor includes:
 a light emitting element configured to emit light; and 
 a light receiving element configured to receive a reflection light that is reflected by the sewing workpiece located in the detection region. 
   
     
     
         18 . The sewing machine according to  claim 1 , wherein the controller is configured to:
 perform the projection in a case where the sewing control is being performed; and   not perform the projection in a case where the sewing control is not being performed.   
     
     
         19 . The sewing machine according to  claim 1 , further comprising the movement detector attached to the presser bar,
 wherein the movement detector includes:   a housing attachable to the presser bar;   a sensor configured to detect the movement amount of the sewing workpiece located in a detection region; and   a presser foot configured to contact the sewing workpiece.   
     
     
         20 . The sewing machine according to  claim 7 , further comprising a start-stop switch for instructing start and stop of a sewing operation, the start-stop switch including a lamp and configured to notify the operating state of the sewing machine  1  by a lighting state of the lamp,
 wherein, when the sewing control is performed, a projection mode of the icon in the projected image is same as the lighting state of the lamp of the start-stop switch; and 
 wherein, when the sewing control is not performed, the icon is not included in the projected image.