Drawing device and drawing method of the same

1. A drawing device, comprising:

a drawing unit which holds a drawing tool for drawing on a drawing target surface in contact with the drawing target surface and moves the drawing tool; and

a control unit which controls the drawing unit,

wherein:

the drawing target surface has a curved shape along a first direction,

the control unit controls the drawing unit to move the drawing tool to draw a plurality of lines in at least one drawing region on the drawing target surface,

the plurality of lines are adjacent to each other, are at least partially in contact with each other in the first direction, and extend in a second direction which crosses the first direction,

the drawing unit is operable to set the drawing tool in a first state in which the drawing tool is in contact with the drawing target surface and a second state in which the drawing tool is separated from the drawing target surface, and

the control unit controls the drawing unit to:

set the drawing tool in the first state at a start point position of a first line among the plurality of the lines in the drawing region, and move the drawing tool, while the drawing tool is in the first state, along the second direction from the start point position of the first line to an end point position of the first line in the drawing region, so as to draw the first line,

set the drawing tool in the second state after drawing the first line, and move the drawing tool, while the drawing tool is in the second state, from the end point position of the first line to a start point position of a second line among the plurality of lines in the drawing region, the second line being adjacent to the first line and at least partially in contact with the first line, and

set the drawing tool in the first state at the start point position of the second line and move the drawing tool, while the drawing tool is in the first state, along the second direction from the start point position of the second line to an end point position of the second line in the drawing region, so as to draw the second line.

2. The drawing device according to claim 1 , wherein:

the drawing target surface is a surface a nail of a finger or a toe, and the first direction is a width direction of the nail, and

the curved shape of the drawing target surface is convexly curved along the first direction.

3. The drawing device according to claim 1 , wherein:

the control unit divides the drawing target surface into a first target region and a second target region,

the first target region is a region from a first end in the first direction on the drawing target surface to a center line passing through a center in the first direction on the drawing target surface and the second target region is a region from the center line to a second end in the first direction in the drawing target surface, and

in a case where the control unit performs the drawing on the drawing target surface in a direction from a side of the first end toward a side of the second end in the first direction on the drawing target surface, (A) the control unit controls the drawing unit such that a first operation in which the drawing tool draws the first and second lines while the drawing tool is set in the first state and a second operation in which the drawing tool is moved from the end point position of the first line to the start point position of the second line while the drawing tool is set in the second state are performed by the drawing unit in the first target region, and (B) the control unit controls the drawing unit such that the second operation is not performed in the second target region.

4. The drawing device according to claim 1 , wherein:

the control unit divides the drawing target surface into a first target region, a second target region, and a third target region,

the first target region is a region on a first end side in the first direction on the drawing target surface, the second target region is a region on a second end side in the first direction in the drawing target surface, and the third target region is a region sandwiched between the first target region and the second target region,

the first target region includes an edge on the first end side in the drawing target surface and is provided on first one end side from a center line passing through a center in the first direction in the drawing target surface,

the second target region includes an edge on the second end side in the drawing target surface and is provided on the second end side from the center line, and

in a case where the control unit performs the drawing on the drawing target surface in a direction from the first end side toward the second end side in the first direction on the drawing target surface, (A) the control unit controls the drawing unit such that the drawing unit performs a first operation in which the drawing tool draws the first and second lines while the drawing tool is set in the first state and a second operation in which the drawing tool is moved from the end point position of the first line to the start point position of the second line while the drawing tool is set in the second state in the first target region, and (B) the control unit controls the drawing unit such that the second operation is not performed in the second target region and the third target region.

5. The drawing device according to claim 4 , wherein the control unit obtains information on a curving level of the curved shape in the drawing target surface based on an image obtained by imaging the drawing target surface, and the control unit determines, based on the obtained information on the curving level of the drawing target surface, a value of a width along the first direction from an end on the first end side in the first direction in the drawing target surface in the first target region and a value of a width along the first direction from an end of the second end side in the first direction in the drawing target surface in the second target region.

6. A drawing method for a drawing device, the drawing device including a drawing unit which holds a drawing tool for drawing on a drawing target surface in contact with the drawing target surface and moves the drawing tool, wherein (i) the drawing target surface has a curved shape along a first direction, (ii) the drawing target surface has at least one drawing region in which the drawing tool draws a plurality of lines which are adjacent to each other, at least partially in contact with each other in the first direction, and extend in a second direction which crosses the first direction, and (iii) the drawing unit is operable to set the drawing tool in a first state in which the drawing tool is in contact with the drawing target surface and a second state in which the drawing tool is separated from the drawing target surface, the drawing method comprising:

performing a first operation which comprises setting the drawing tool in the first state at a start point position of a first line among the plurality of the lines in the drawing region, and moving the drawing tool, while the drawing tool is in the first state, along the second direction from the start point position of the first line to an end point position of the first line in the drawing region, so as to draw the first line;

performing a second operation which comprises setting the drawing tool in the second state after drawing the first line, and moving the drawing tool, while the drawing tool is in the second state, from the end point position of the first line to a start point position of a second line among the plurality of lines in the drawing region, the second line being adjacent to the first line and at least partially in contact with the first line; and

performing a third operation which comprises setting the drawing tool in the first state at the start point position of the second line and moving the drawing tool, while the drawing tool is in the first state, along the second direction from the start point position of the second line to an end point position of the second line in the drawing region, so as to draw the second line.

7. The drawing method for the drawing device according to claim 6 , further comprising dividing the drawing target surface into a first target region and a second target region,

wherein:

the first target region is a region from a first end in the first direction on the drawing target surface to a center line passing through a center in the first direction on the drawing target surface and the second target region is a region from the center line to a second end in the first direction in the drawing target surface, and

in a case where the drawing tool performs the drawing on the drawing target surface in a direction from a side of the first end toward a side of the second end in the first direction on the drawing target surface, (A) the first operation, the second operation, and the third operation are performed in the first target region, and (B) the second operation is not performed in the second target region.

8. The drawing method for the drawing device according to claim 6 , further comprising dividing the drawing target surface into a first target region, a second target region, and a third target region,

wherein:

the first target region is a region on a first end side in the first direction on the drawing target surface, the second target region is a region on a second end side in the first direction in the drawing target surface, and the third target region is a region sandwiched between the first target region and the second target region,

the first target region includes an edge on the first end side in the drawing target surface and is provided on the first end side from a center line passing through a center in the first direction in the drawing target surface, the second target region includes an edge on the second end side in the drawing target surface and is provided on the second end side from the center line in the drawing target surface, and

in a case where the drawing tool performs the drawing on the drawing target surface in a direction from the first end side toward the second end side in the first direction in the drawing target surface, (A) the first operation, the second operation, and the third operation are performed in the first target region, and (B) the second operation is not performed in the second target region and the third target region.