Sewing machine

Patent metadata

Field	Value
Publication number	US-11401641-B2
Application number	US-202017111018-A
Country	US
Kind code	B2
Filing date	Dec 3, 2020
Priority date	Jul 2, 2018
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

In a sewing machine, an arm includes, on one side thereof in a first direction, a head. A needle bar is disposed at the head to reciprocally move in a second direction. A feed mechanism feeds a workpiece from one side toward the other side of the head in a third direction. The projection unit disposed at the head projects a projection image toward a bed. The projection unit includes an emitter for projecting image light of the projection image. The photographing unit disposed at the head captures a photographing target. The photographing unit includes an incident portion on which light reflected by the photographing target is incident. The emitter and the incident portion are disposed further toward the one side of the arm in the first direction than the needle bar, and further toward the one side of the head in the third direction than the needle bar.

First claim

What is claimed is:

1. A sewing machine comprising:
a bed;
an arm extending in a first direction and including, on one side thereof in the first direction, a head;
a needle bar disposed at the head and configured to receive a needle and reciprocally move in a second direction orthogonal to the first direction;
a feed mechanism configured to feed a workpiece, from one side toward the other side of the head, in a third direction orthogonal to the first direction and the second direction;
a projection unit disposed at the head and configured to project a projection image toward the bed, the projection unit including an emitter from which image light of the projection image is emitted;
a photographing unit disposed at the head and configured to capture a photographing target, the photographing unit including an incident portion on which light reflected by the photographing target is incident; and
a first rotation mechanism configured to rotate, about a first axis, an emission direction in which the image light is emitted from the emitter of the projection unit,
wherein the emitter of the projection unit and the incident portion of the photographing unit are disposed further toward the one side of the arm in the first direction than the needle bar, and further toward the one side of the head in the third direction than the needle bar,
wherein the projection unit includes a generator configured to generate the image light, the emitter includes a first lens, and the image light generated by the generator is emitted via the first lens toward the bed, and
wherein the first axis and a first intersection of a plurality of first straight lines defined to extend from the first lens toward the generator along beams of the image light emitted in the emission direction are at a substantially same position in the second direction.

2. The sewing machine according to claim 1 , wherein the emitter of the projection unit is disposed further toward the other side of the arm in the first direction than the incident portion of the photographing unit.

3. The sewing machine according to claim 1 , wherein the emitter of the projection unit is disposed further toward the one side of the head in the third direction than the incident portion of the photographing unit.

4. The sewing machine according to claim 1 , wherein the emitter of the projection unit is disposed farther from the bed in the second direction than the incident portion of the photographing unit.

5. A sewing machine comprising:
a bed;
an arm extending in a first direction and including, on one side thereof in the first direction, a head;
a needle bar disposed at the head and configured to receive a needle and reciprocally move in a second direction orthogonal to the first direction;
a feed mechanism configured to feed a workpiece, from one side toward the other side of the head, in a third direction orthogonal to the first direction and the second direction;
a projection unit disposed at the head and configured to project a projection image toward the bed, the projection unit including an emitter from which image light of the projection image is emitted;
a photographing unit disposed at the head and configured to capture a photographing target, the photographing unit including an incident portion on which light reflected by the photographing target is incident; and
a second rotation mechanism configured to rotate, about a second axis, an incident direction in which the reflected light is incident on the incident portion of the photographing unit,
wherein the emitter of the projection unit and the incident portion of the photographing unit are disposed further toward the one side of the arm in the first direction than the needle bar, and further toward the one side of the head in the third direction than the needle bar,
wherein the photographing unit includes a detector configured to detect the reflected light, the incident portion includes a second lens, and the detector is configured to detect the reflected light incident via the second lens, and
wherein the second axis and a second intersection of a plurality of second straight lines defined to extend from the second lens toward the detector along beams of the reflected light incident in the incident direction are at a substantially same position in the second direction.

6. The sewing machine according to claim 1 , further comprising a threading mechanism disposed at the head and configured to pass a thread through the needle,
wherein the projection unit is disposed at the threading mechanism.

7. The sewing machine according to claim 1 , wherein the projection image projected by the projection unit is included in a photographing area of the photographing unit.

8. A sewing machine comprising:
a bed;
an arm extending in a first direction and including, on one side thereof in the first direction, a head;
a needle bar disposed at the head and configured to receive a needle and reciprocally move in a second direction orthogonal to the first direction;
a feed mechanism configured to feed a workpiece, from one side toward the other side of the head, in a third direction orthogonal to the first direction and the second direction;
a projection unit disposed at the head and configured to project a projection image toward the bed, the projection unit including an emitter from which image light of the projection image is emitted;
a photographing unit disposed at the head and configured to capture a photographing target, the photographing unit including an incident portion on which light reflected by the photographing target is incident;
a take-up unit disposed at the head and configured to reciprocally move in the second direction within a predetermined moving range; and
a partition wall disposed between the projection unit and the moving range in the first direction,
wherein the emitter of the projection unit and the incident portion of the photographing unit are disposed further toward the one side of the arm in the first direction than the needle bar, and further toward the one side of the head in the third direction than the needle bar.

9. The sewing machine according to claim 8 , wherein the partition wall includes a plurality of plate portions extending in different directions from each other and connected to each other, and a connecting portion of the plurality of the plate portions is curved.

10. A sewing machine comprising:
a bed;
an arm extending in a first direction and including, on one side thereof in the first direction, a head;
a needle bar disposed at the head and configured to receive a needle and reciprocally move in a second direction orthogonal to the first direction;
a feed mechanism configured to feed a workpiece, from one side toward the other side of the head, in a third direction orthogonal to the first direction and the second direction;
a projection unit disposed at the head and configured to project a projection image toward the bed, the projection unit including an emitter from which image light of the projection image is emitted;
a photographing unit disposed at the head and configured to capture a photographing target, the photographing unit including an incident portion on which light reflected by the photographing target is incident;
a heat absorber configured to cool the projection unit by absorbing heat of the projection unit; and
a transmitter configured to transmit the heat absorbed by the heat absorber to a support supporting the arm,
wherein the emitter of the projection unit and the incident portion of the photographing unit are disposed further toward the one side of the arm in the first direction than the needle bar, and further toward the one side of the

Assignees

• Brother Ind Ltd

Inventors

• Oka Hidenori
• Iida Mitsuhiro

Classifications

• D05B19/085 Primary

  Physical layout of switches or displays; Switches co-operating with the display · CPC title

• D05B79/00 Primary

  Incorporations or adaptations of lighting equipment · CPC title

• D05D2205/16

  Display arrangements · CPC title

• D05B35/12

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