Sewing machine

Patent metadata

Field	Value
Publication number	US-10443168-B2
Application number	US-201715714855-A
Country	US
Kind code	B2
Filing date	Sep 25, 2017
Priority date	Sep 15, 2015
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A sewing machine includes an arm portion, a thread spool mounting portion, a bobbin winder, a first guide portion, a second guide portion, and a partition wall member. The arm portion is provided with a drive shaft extending in a first direction. The thread spool mounting portion includes a thread spool pin to be inserted through a through hole of a thread spool. The bobbin winder is provided further to one end side of the arm portion than the thread spool mounting portion. The first guide portion is provided further to another end side of the arm portion than the thread spool mounting portion. The second guide portion is provided further to another end side in the first direction of the arm portion than the first guide portion. The partition wall member is disposed between the thread spool pin and the first guide portion in a second direction.

First claim

What is claimed is:

1. A sewing machine comprising:
an arm portion internally provided with a drive shaft extending in a first direction;
a thread spool mounting portion provided on the arm portion and including a thread spool pin configured to be inserted through a through hole of a thread spool around which a thread is wound, the thread spool being mounted on the thread spool mounting portion, the thread spool mounting portion including a thread spool stand configured to fix one end portion of the thread spool pin;
a bobbin winder provided further to one end side in the first direction of the arm portion than the thread spool mounting portion, and configured to wind the thread drawn out from the thread spool onto a bobbin;
a tensioner provided further to another end side in the first direction of the arm portion than the thread spool mounting portion, configured to apply a tension to the thread drawn out from the thread spool, and configured to supply the thread drawn out from the thread spool to the bobbin winder;
a thread hook portion provided further to the another end side in the first direction of the arm portion than the tensioner, and configured to guide the thread drawn out from the thread spool, which is to be supplied to a sewing needle mounted on a needle bar that is configured to move up and down in accordance with rotation of the drive shaft; and
a partition wall member provided on the thread spool stand and disposed between the thread spool pin and the tensioner in a second direction that is orthogonal to the first direction.

2. The sewing machine according to claim 1 , wherein
the partition wall member extends from the thread spool stand along an extending direction of the thread spool pin.

3. The sewing machine according to claim 1 , wherein
a disc-shaped thread spool retainer is configured to be mounted on the thread spool mounting portion, the thread spool retainer being configured to hold the thread spool in a state in which the thread spool pin is inserted through the through hole, and
the partition wall member is disposed between the thread spool pin and the tensioner, further to the outside in a radial direction of the thread spool pin than an outer peripheral edge portion of the thread spool retainer.

4. The sewing machine according to claim 1 , wherein
the partition wall member is configured to rotate around an axis of the thread spool pin.

5. The sewing machine according to claim 4 , wherein
the partition wall member is a plate-shaped member whose axial cross section has a circular arc shape around the axis of the thread spool pin.

6. The sewing machine according to claim 4 , wherein
the partition wall member is configured to rotate between a first position and a second position, the first position being a position of the partition wall member between the thread spool pin and the tensioner, and the second position being a position of the partition wall member at which exposure of the thread spool is larger than that in the first position in a plan view of the sewing machine, and
the sewing machine further comprises an urging member configured to urge the partition wall member from the second position toward the first position.

7. The sewing machine according to claim 1 , wherein
the partition wall member includes:
a first member configured to be disposed between the thread spool pin and the tensioner; and
a second member configured to rotate around an axis of the thread spool pin, and configured to rotate between a third position and a fourth position, the third position being a position of the second member positioned between the thread spool pin and the tensioner in a state in which an end portion of the first member and an end portion of the second member overlap with each other in a radial direction of the thread spool pin, and the fourth position being a position of the second member at which exposure of the thread spool is larger than that in the third position in a plan view of the sewing machine, in a state in which the overlap of the first member and the second member is larger than in the third position.

8. The sewing machine according to claim 1 , wherein
the thread spool mounting portion is configured to rotate between a fifth position and a sixth position, the fifth position being a position of the thread spool mounting portion in which an extending direction of the thread spool pin is along the first direction, and the sixth position being a position of the thread spool mounting portion in which the extending direction of the thread spool pin intersects with the first direction,
the partition wall member is configured to rotate between a first position and a second position, the first position being a position of the partition wall member between the thread spool pin and the tensioner, and the second position being a position of the partition wall member at which exposure of the thread spool is larger than that in the first position in a plan view of the sewing machine,
the sewing machine further comprises a transmission portion configured to be in contact with the thread spool mounting portion, and configured to transmit a driving force generated by rotation of the thread spool mounting portion to the partition wall member, and
the partition wall member is positioned in the first position when the thread spool mounting portion is positioned in the fifth position, rotates from the first position toward the second position due to the driving force transmitted by the transmission portion when the thread spool mounting portion rotates from the fifth position to the sixth position, and is positioned in the second position when the thread spool mounting portion is positioned in the sixth position.

Assignees

• Brother Ind Ltd

Inventors

• Fujihara Shinya

Classifications

• D05B43/00

  Spool-pin assemblies incorporated in sewing machines · CPC title

• D05B47/00

  Needle-thread tensioning devices; Applications of tensometers · CPC title

• D05B59/00 Primary

  Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith · CPC title