US 12,270,136 B2Granted

Pressing device supporting presser foot and sewing machine provided with the pressing device

AssigneeBrother Kogyo Kabushiki Kaisha

InventorHiroki Mori

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Abstract

In a pressing device, a first member is movable in an up-down direction along with a presser bar of a sewing machine in a mounted state in which the pressing device is mounted on the presser bar. A second member supports a presser foot. The presser bar applies, through the second member, a presser force to the presser foot downward in the mounted state. A third member is disposed between the first and second members in the up-down direction in the mounted state. A gap-adjusting member adjusts a gap between the first and third members by contacting at least one of the first and third members. An urging member urges the second and third members away from each other with an urging force smaller than the pressing force of the presser bar. A guide part guides movement of the second and third members relative to the first member.

Claims17

Dependent claims

A pressing device to be mounted in a sewing machine, the sewing machine including:

a bed section on which a workpiece is to be placed;
and a presser bar on which the pressing device is to be mounted, the presser bar extending in an up-down direction and being configured to be urged downward, the pressing device comprising:
a first member having a mounting part, the mounting part having a recessed shape and being mountable on the presser bar, the first member being movable in the up-down direction along with the presser bar in a mounted state in which the pressing device is mounted on the presser bar;
a second member to which a presser foot is attachable on a lower side of the second member, the presser foot being configured to press the workpiece placed on the bed section downward, the presser bar being configured to apply, through the second member, a pressing force to the presser foot downward in the mounted state;
a third member disposed between the first member and the second member to connect the first member and the second member in the up-down direction in the mounted state, the third member being movable in the up-down direction in the mounted state;
a gap-adjusting member configured to adjust a gap between the first member and the third member by contacting at least one of the first member and the third member;
an urging member configured to urge the second member and the third member away from each other with an urging force smaller than the pressing force of the presser bar;
and
a guide part configured to guide movement of the second member and the third member relative to the first member.

6 more elements

A sewing machine comprising:

a sewing machine motor;
a needle bar extending in an up-down direction and having a lower end portion on which a needle is to be mounted, the needle bar being configured to be urged downward, the needle bar being configured to be driven by the sewing machine motor to move in the up-down direction;
a throat plate formed with a needle hole and an opening, the needle being configured to pass through the needle hole in accordance with movement of the needle bar in the up-down direction;
a feed dog configured to emerge from and be retracted beneath the opening, the feed dog being configured to feed a workpiece placed on the throat plate;
a feed mechanism configured to be driven by the sewing machine motor to drive the feed dog;
a presser bar extending in the up-down direction and having a lower end portion, the presser bar being configured to move in the up-down direction in synchronization with movement of the feed dog, the presser bar being configured to be urged downward;
and
a pressing device detachably mounted on the lower end portion of the presser bar, the pressing device comprising:
a first member having a mounting part, the mounting part having a recessed shape and being mountable on the presser bar, the first member being movable in the up-down direction along with the presser bar in a mounted state in which the first member is mounted on the presser bar;
a second member to which a presser foot is attachable on a lower side of the second member, the presser foot being configured to press the workpiece placed on the throat plate downward, the presser bar being configured to apply, through the second member, a pressing force to the presser foot downward;
a third member disposed between the first member and the second member to connect the first member and the second member in the up-down direction, the third member being movable in the up-down direction;
a gap-adjusting member configured to adjust a gap between the first member and the third member by contacting at least one of the first member and the third member;
an urging member configured to urge the second member and the third member away from each other with an urging force smaller than the pressing force of the presser bar;
and
a guide part configured to guide movement of the second member and the third member relative to the first member.

12 more elements

Dependencies are inferred from the claim text.