US 9,556,546 B2Granted

Sewing machine

AssigneeBrother Kogyo Kabushiki Kaisha

InventorsYasuhiko Kawaguchi, Nobuhiko Funato, Toshiyuki Mamiya, Takahira Osamura

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Abstract

A sewing machine includes a sewing machine motor configured to generate drive power to drive a needle bar up-and-down motion mechanism and a cutting unit. The cutting unit includes a cutting needle having a distal end with a blade, and a cutting needle up-and-down motion mechanism having a first motor separate from a sewing machine motor and configured to generate drive power to move the cutting needle independently of the needle bar up-and-down motion mechanism. A cut is formed by the blade as a result of up-and-down motion of the cutting needle while the cutting needle is held in a manner such that an extending direction of the cutting needle corresponds with an extending direction of the needle bar. The cutting unit further includes a cutting needle rotating mechanism configured to rotate the cutting needle about a central axis line of the cutting needle directed to the extending direction.

Claims13

Dependent claims

A sewing machine comprising:

a needle bar to which a sewing needle is attached;
a needle bar up-and-down motion mechanism moving the needle bar up and down;
a sewing machine motor configured to generate drive power to drive the needle bar up-and-down motion mechanism so that the needle bar is moved up and down;
and
a cutting unit including:
a cutting needle having a distal end formed with a blade;
a cutting needle up-and-down motion mechanism having a first motor which is separate from the sewing machine motor and which is configured to generate drive power to move the cutting needle up and down independently of the needle bar up-and-down motion mechanism, so that a cut is formed by the blade as a result of the up-and-down motion of the cutting needle while the cutting needle is held in a manner such that an extending direction of the cutting needle corresponds with an extending direction of the needle bar;
and
a cutting needle rotating mechanism configured to rotate the cutting needle about a central axis line of the cutting needle directed to the extending direction of the needle bar and the cutting needle.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/604,053Filed 23 Jan 2015
Priority: JP 2014-02323510 Feb 2014
Published: US 2015/0225883 A113 Aug 2015
Granted: 31 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

D05B 19/12
Sewing machines having electronic memory or microprocessor control unit: characterised by control of operation of machine
D05B 37/063
With oscillating tools: in synchronism with the movement of the needle bar or the work-feeding means
D05B 81/00
Sewing machines incorporating devices serving purposes other than sewing
D05C 7/04
Special-purpose or automatic embroidering machines: for boring or jogging