Sewing machine

Patent metadata

Field	Value
Publication number	US-11248324-B2
Application number	US-202016898295-A
Country	US
Kind code	B2
Filing date	Jun 10, 2020
Priority date	Dec 15, 2017
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

A sewing machine includes a bed, a feed unit, a sewing unit, a projector, and a controller. The projector is configured to project a projection image to the bed. The controller is configured to, where the feed unit and the sewing unit do not perform sewing, execute a first control in which the controller causes the projector to project a first image to the bed, the first image including a first object and a second object, the first object indicating a planned sewing position, the second object indicating a reference position to position the workpiece. The controller is configured to, where the feed unit and the sewing unit perform sewing, execute a second control in which the controller causes the projector to project a second image to the bed, the second image including the first object and not including the second object.

First claim

What is claimed is:

1. A sewing machine comprises:
a bed;
a feed unit including a feed dog and configured to allow the feed dog to feed a workpiece placed on the bed in a feed direction;
a sewing unit including a needle bar and a needle attached to the needle bar, the sewing unit being configured to move the needle up and down to form stitches on the workpiece fed by the feed unit;
a projector configured to project a projection image to the bed; and
a controller configured to control the feed unit, the sewing unit, and the projector, the controller being configured to:
where the feed unit and the sewing unit do not perform sewing, execute a first control in which the controller causes the projector to project a first image to the bed, the first image including a first object and a second object, the first object indicating a planned sewing position, the second object indicating a reference position to position the workpiece; and
where the feed unit and the sewing unit perform sewing, execute a second control in which the controller causes the projector to project a second image to the bed, the second image including the first object and not including the second object.

2. The sewing machine according to claim 1 , further comprising an operation unit,
wherein, when receiving a sewing start instruction via the operation unit, the controller causes the feed unit and the sewing unit to perform sewing and executes the second control for the projector.

3. The sewing machine according to claim 2 , wherein, where the feed unit and the sewing unit perform sewing, when the controller receives a sewing stop instruction via the operation unit, the controller executes a stop control to stop sewing and executes the first control.

4. The sewing machine according to claim 1 , further comprising:
a presser bar; and
a presser bar mover configured to move the presser bar between a first position in proximity to the bed and a second position spaced further from the bed than the first position,
wherein, where the feed unit and the sewing unit do not perform sewing and the presser bar is at the second position, the controller executes the first control.

5. The sewing machine according to claim 1 , further comprising:
a presser bar; and
a presser bar mover configured to move the presser bar between a first position in proximity to the bed and a second position spaced from the bed further than the first position,
wherein, where the feed unit and the sewing unit perform sewing, the controller executes the second control, and
wherein, where the feed unit and the sewing unit do not perform sewing and the presser bar mover moves the presser bar from the second position to the first position, the controller executes the second control.

6. The sewing machine according to claim 1 , wherein, in the second control executed by the controller, the second image projected by the projector includes the first object and a third object different from the first object and the second object.

7. The sewing machine according to claim 6 , further comprising a detector configured to detect selection of the third object included in the second image projected by the projector,
wherein, where the detector detects the selection of the third object, the controller executes a stop control to stop sewing.

8. The sewing machine according to claim 7 , wherein, where the detector detects the selection of the third object, the controller further executes the first control.

9. The sewing machine according to claim 6 , wherein, in the second image projected in the second control, the first object and the third object are spaced from each other.

10. The sewing machine according to claim 1 , further comprising a lighting unit having a light source and configured to emit light toward the bed,
wherein the controller is configured to:
during execution of the first control, execute a third control in which the controller causes the lighting unit to emit light with a first light amount of the light source; and
during execution of the second control, execute a fourth control in which the controller causes the lighting unit to emit light with a second light amount of the light source, the second light amount being greater than the first light amount.

11. The sewing machine according to claim 1 , wherein the first object is a line segment extending from a needle drop position of the needle toward an upstream side in the feed direction.

12. The sewing machine according to claim 1 , wherein the first object and the second object are indicated in different colors.

Assignees

• Brother Ind Ltd

Inventors

• Imaizumi Kazutaka

Classifications

• D05B35/12 Primary

  Indicators for positioning work, e.g. with graduated scales · CPC title

• D05B79/00

  Incorporations or adaptations of lighting equipment · CPC title