CN109837660A - A kind of driving device of automatic shearing and automatic needle-foot-lifting - Google Patents
A kind of driving device of automatic shearing and automatic needle-foot-lifting Download PDFInfo
- Publication number
- CN109837660A CN109837660A CN201910143730.XA CN201910143730A CN109837660A CN 109837660 A CN109837660 A CN 109837660A CN 201910143730 A CN201910143730 A CN 201910143730A CN 109837660 A CN109837660 A CN 109837660A
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- China
- Prior art keywords
- trimming
- presser foot
- lifting
- basic circle
- driven pin
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/10—Electrical or electromagnetic drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention belongs to technical field of sewing machines, refer specifically to a kind of simple structure and the automatic shearing of certifiable sewing machine stable operation and the driving device of automatic needle-foot-lifting, including presser foot lifter drive rod, trimming drive rod, stepper motor, setting are in stepper motor overhead cam ontology, presser foot lifter connecting rod and trimming connecting rod；It is provided with the presser foot lifter driving cam surface for including basic circle face and lifting curve on cam body and trimming drives cam surface；The other end of presser foot lifter connecting rod is articulated with one end of presser foot lifter drive rod, and presser foot lifter connecting rod is equipped with the first driven pin；The other end of trimming connecting rod is hinged with trimming drive rod, and trimming connecting rod is equipped with the second driven pin；When stepper motor drives cam body certain angle clockwise, one of them driven pin enters lifting curve from basic circle face, another driven pin slides on basic circle face；When rotating counterclockwise, another driven pin enters lifting curve from basic circle face, and a driven pin slides on basic circle face.
Description
The application is " a kind of automatic shearing and the auto lifting pressure of application number 2016106141869, applying date 2016.07.30
The driving device of foot " divisional application.
Technical field
The invention belongs to technical field of sewing machines, the driving device of a kind of automatic shearing and automatic needle-foot-lifting is referred specifically to.
Background technique
The presser feet pull rod on sewing machine for the hooking bar of trimming and for presser foot lifter passes through two electromagnet respectively at present
It is controlled, when needing to carry out trimming operation, is moved back and forth by a magnet control hooking bar, when needing to carry out presser foot lifter
When, moved back and forth by another magnet control presser feet pull rod.Since electromagnet differs greatly in actuation with speed when flicking,
Therefore biggish sound and shaking are often generated when hooking bar or presser feet pull rod move back and forth, and then is possible to influence sewing machine
Steady operation.
Summary of the invention
In order to overcome the defects of the prior art, the simple and certifiable sewing the purpose of the present invention is to provide a kind of structure
The automatic shearing of machine stable operation and the driving device of automatic needle-foot-lifting.
The object of the present invention is achieved like this:
The driving device of a kind of automatic shearing and automatic needle-foot-lifting, including presser foot lifter drive rod and trimming drive rod；Also wrap
Stepper motor, presser foot lifter connecting rod and trimming connecting rod are included, is provided with presser foot lifter driving machine on the output shaft of the stepper motor
Structure and trimming driving mechanism, the output shaft drive the presser foot lifter driving cam surface and trimming driving mechanism of presser foot lifter driving mechanism
Trimming driving cam surface movement；The hinged presser foot lifter connecting rod in presser foot lifter drive rod one end is arranged in presser foot lifter connecting rod
There is the first driven pin, the first driven pin is slided along presser foot lifter driving cam surface；One end of the trimming drive rod is hinged
The second driven pin is provided in trimming connecting rod, trimming connecting rod, the second driven pin is sliding along trimming driving cam surface
It is dynamic；It includes basic circle face and lifting curve that presser foot lifter, which drives cam surface and trimming driving cam surface,；When presser foot lifter drive rod and cut
When line drive rod is in initial state, two driven pins are born against on corresponding basic circle face；Stepper motor is originating
When state drives the cam body certain angle clockwise, one of them driven pin enters lifting curve from basic circle face, separately
One driven pin slides on basic circle face；Stepper motor drives the cam body certain angle in initial state counterclockwise
When, another driven pin enters lifting curve from basic circle face, and a driven pin slides on basic circle face.
The present invention is further arranged to: the presser foot lifter driving cam surface and trimming driving cam surface are separately positioned on
In the both ends of the surface of cam body, and cam body is disc cam.
The present invention is further arranged to: the trimming driving cam surface is the track groove to concave.
The present invention is further arranged to: the presser foot lifter driving cam surface includes the first basic circle and the first lifting curve, institute
It states the first basic circle to be arranged concentrically with cam body, the outside eccentric setting of the first lifting curve.
The present invention is further arranged to: the track groove includes the second basic circle and the second lifting curve, second basic circle
It is arranged concentrically with cam body, the central protuberance of the inside cam body of the second lifting curve.
The present invention is further arranged to: the track groove further includes the third lifting curve extended to the first basic circle head end,
The third lifting curve is protruded to the periphery of cam body.
The present invention is further arranged to: the junction of first basic circle and the first lifting curve is with outward extension only
Position portion one.
The present invention is further arranged to: it is movably set with the first driven pin in the middle part of the presser foot lifter connecting rod, first
One end of driven pin is provided with rotatable first runner, and first runner is past along the periphery wall of presser foot lifter driving cam surface
Multiple movement.
The present invention is further arranged to: the second driven pin, the second follower pin are movably set in the trimming connecting rod
One end of son is provided with rotatable second runner, and second runner is adapted to track groove, and second runner is along track groove
Inner wall move back and forth.
The present invention is further arranged to: the trimming connecting rod is slidably connected by joining beam and trimming drive rod spherical shape.
The present invention protrudes compared with prior art and beneficial having the technical effect that replaces traditional approach by a stepper motor
Two high-power electromagnets, reduce the structure of driving device, cam body is installed on the output shaft of stepper motor can be same
When driving cutting facility and presser foot lifting device, the rotation of presser foot lifter driving cam surface and trimming driving cam surface can be kept in this way
Speed keeps identical, and angular speed immobilizes, position it is more reliable, while in sewing machine operating presser foot lifter drive rod,
The pop-up of trimming drive rod is identical with the dynamics of recycling, and whole device stability can in this way improved, makes the shaking of whole device
It is reduced with noise.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is configuration schematic diagram of the invention；
Fig. 3 is the partial structural diagram in a direction of the invention；
Fig. 4 is the partial structural diagram of other direction of the present invention；
Fig. 5 is the structural schematic diagram of presser foot lifter driving cam surface of the present invention；
Fig. 6 is the structural schematic diagram of track groove of the present invention.
Figure label meaning:
1- shell；2- presser foot lifter drive rod；3- trimming drive rod；4- stepper motor；5- cam body；
6- presser foot lifter drives cam surface；The first basic circle of 61-；The first lifting curve of 62-；63- position-arresting part one；
7- track groove；The second basic circle of 71-；The second lifting curve of 72-；73- third lifting curve；
8- presser foot lifter connecting rod；9- trimming connecting rod；The first runner of 10-；The second runner of 11-；12- joining beam；
The driven pin of 13- first；The driven pin of 14- second.
Specific embodiment
With specific embodiment, the invention will be further described with reference to the accompanying drawing:
Embodiment one:
Referring to shown in Fig. 1 to Fig. 6, the driving device of a kind of automatic shearing and automatic needle-foot-lifting, including presser foot lifter drive rod
2, trimming drive rod 3, stepper motor 4, cam body 5, presser foot lifter connecting rod 8 and trimming connecting rod 9, the cam body 5 are set
It sets on the output shaft of stepper motor 4；Presser foot lifter driving cam surface 6 and trimming driving cam are provided on the cam body 5
Face；One end of the presser foot lifter connecting rod 8 is articulated on sewing machine shell 1, and the other end of presser foot lifter connecting rod 8 is articulated with lift pressure
One end of foot drive rod 2, the first driven pin 13 is additionally provided in presser foot lifter connecting rod 8, and the first driven pin 13 is pressed along lift
Foot drives cam surface 6 to slide；One end of the trimming connecting rod 9 is articulated on sewing machine shell 1, trimming connecting rod 9 it is another
End is hinged with the trimming drive rod 3, and the second driven pin 14, the second driven 14 edge of pin are additionally provided in trimming connecting rod 9
Trimming driving cam surface sliding；It includes basic circle face and lifting curve that presser foot lifter, which drives cam surface 6 and trimming driving cam surface,；
When presser foot lifter drive rod 2 and trimming drive rod 3 are in initial state, two driven pins are born against in corresponding basic circle
On face；Stepper motor 4 when initial state drives 5 certain angle of cam body clockwise, one of them driven pin from
Basic circle face enters lifting curve, another driven pin slides on basic circle face；Stepper motor 4 drives counterclockwise in initial state
When 5 certain angle of cam body, another driven pin enters lifting curve from basic circle face, and a driven pin is in basic circle
It is slided on face, two high-power electromagnets of traditional approach is replaced by a stepper motor 4, reduce the knot of driving device
Structure, cutting facility and presser foot lifting device can be driven simultaneously by installing cam body 5 on the output shaft of stepper motor 4, in this way can be with
Whole device stability is improved, the shaking of whole device and noise are reduced.
Be further arranged to: the cam body 5 is disc cam, and an end face of cam body 5 is provided with the lift pressure
Foot drives cam surface 6, and the other end of cam body 5 is provided with the trimming driving cam surface.
Be further arranged to: the trimming driving cam surface is the track groove 7 to concave.
Be further arranged to: the presser foot lifter driving cam surface 6 includes the first basic circle 61 and the first lifting curve 62, described
First basic circle 61 is arranged concentrically with cam body 5, the outside eccentric setting of the first lifting curve 62.
Be further arranged to: the track groove 7 includes the second basic circle 71 and the second lifting curve 72, second basic circle 71
It is arranged concentrically with cam body 5, the central protuberance of the inside cam body 5 of the second lifting curve 72.
Be further arranged to: the track groove 7 further includes the third lifting curve 73 extended to 61 head end of the first basic circle, institute
It states third lifting curve 73 to protrude to the periphery of cam body 5, such third lifting curve 73 can be to the fortune of trimming connecting rod 9
Dynamic rail mark plays a protective role, and in trimming connecting rod 9, third lifting curve 73 can connect trimming after the second lifting curve 72
Extension bar 9 plays buffering effect, avoids 9 trimming of trimming connecting rod driving trimming drive rod 3 from moving, protects cutting facility.
It is further arranged to: the junction stop bit with outward extension of first basic circle 61 and the first lifting curve 62
Portion 1, position-arresting part 1 can carry out a limit to the rotation of cam body 5, avoid cam body 5 from rotating excessive to lift
Foot device damages.
Be further arranged to: the middle part of the presser foot lifter connecting rod 8 is movably set with the first driven pin 13, and first is driven
One end of pin 13 is provided with rotatable first runner 10, and first runner 10 is along the periphery of presser foot lifter driving cam surface 6
Wall moves back and forth.
It is further arranged to: being movably set with the second driven pin 14, the second driven pin 14 in the trimming connecting rod 9
One end be provided with rotatable second runner 11, second runner 11 is adapted to track groove 7, and second runner 11 is along rail
The inner wall of road slot 7 moves back and forth.
Be further arranged to: the trimming connecting rod 9 is slidably connected by joining beam 12 and 3 spherical shape of trimming drive rod.
It can keep the presser foot lifter on cam body 5 that the rotation speed of cam surface 6 and track groove 7 is driven to keep complete in this way
It is identical, and angular speed immobilizes, positioning is more reliable, while presser foot lifter drive rod 2, trimming drive rod 3 in sewing machine operating
Pop-up is identical with the dynamics of recycling, and whole device stability can in this way improved, and reduces the shaking of whole device and noise.
The movement of sewing machine is divided into two: trimming and presser foot lifter.
When presser foot lifter drives cam surface 6 to install towards the outside of stepper motor 4:
When stepper motor 4 inverts, the periphery wall fortune of first basic circle 61 of first runner 10 on presser foot lifter driving cam surface 6
Dynamic, since the first circular arc and cam body 5 are arranged concentrically, the first runner 10 does not drive the movement of presser foot lifter connecting rod 8, presser foot lifter without
Movement；And the second runner 11 in the track groove 7 of 5 another side of cam body then enters the second lift song along the second basic circle 71
Face 72,11 running track of the second runner change, and so that the second runner 11 is shortened at a distance from 5 center of cam body, thus band
One end of dynamic trimming connecting rod 9 drives joining beam 12, and joining beam 12 drives trimming drive rod 3 that cutting facility is driven to generate trimming action；
When stepper motor 4 rotates forward, the second runner 11 is operated along the second circular arc, and presser foot lifter drives the first base on cam surface 6
The periphery wall movement of circle 61, since the second circular arc and cam body 5 are arranged concentrically, the second runner 11 does not drive trimming connecting rod 9
Movement, cutting facility attonity；And the first runner 10 then enters the first lifting curve 62, the first runner along the first basic circle 61
10 running tracks change, and it is elongated at a distance from 5 center of cam body to make the first runner 10, to drive presser foot lifter connecting rod
8 one end driving presser foot lifter drive rod 2 drives presser foot lifting device to realize presser foot lifter.
When presser foot lifter drives cam surface 6 to install towards the inside of stepper motor 4: when stepper motor 4 rotates forward, presser foot lifter is without dynamic
Make, cutting facility generates trimming action；When stepper motor 4 inverts, cutting facility attonity, presser foot lifting device realizes presser foot lifter.
Embodiment two:
The present embodiment is basically the same as the first embodiment, and difference is: presser foot lifter drives cam surface 6 and trimming driving convex
Wheel face is independently arranged, i.e. the presser foot lifter and trimming of presser foot lifter driving mechanism and trimming driving mechanism independent control sewing machine.
In addition, the opposite installation position of driving cam surface and driven pin in presser foot lifter driving mechanism and trimming driving mechanism
Setting can be interchanged, such as: trimming driving cam surface is provided in the trimming connecting rod 9, trimming driving cam surface concaves
Track groove 7；The second driven pin 14, one end setting of the second driven pin 14 are provided on the output shaft of the stepper motor 4
There is rotatable second runner 11, second runner 11 is adapted to track groove 7, and second runner 11 is along track groove 7
Wall moves back and forth.
Above-described embodiment is only presently preferred embodiments of the present invention, is not limited the scope of the invention according to this, therefore: it is all according to
The equivalence changes that structure of the invention, shape, principle are done, should all be covered by within protection scope of the present invention.
Claims (10)
1. the driving device of a kind of automatic shearing and automatic needle-foot-lifting, including presser foot lifter drive rod and trimming drive rod；Its feature
It is: further includes stepper motor, presser foot lifter connecting rod and trimming connecting rod, lift pressure is provided on the output shaft of the stepper motor
Foot driving mechanism and trimming driving mechanism, the output shaft drive the presser foot lifter driving cam surface and trimming of presser foot lifter driving mechanism
The trimming driving cam surface movement of driving mechanism；The hinged presser foot lifter connecting rod in presser foot lifter drive rod one end, presser foot lifter connection
The first driven pin is provided on bar, the first driven pin is slided along presser foot lifter driving cam surface；The trimming drive rod
One end is hinged on trimming connecting rod, and the second driven pin is provided in trimming connecting rod, and the second driven pin drives along trimming
Cam surface sliding；It includes basic circle face and lifting curve that presser foot lifter, which drives cam surface and trimming driving cam surface,；When presser foot lifter passes
When lever and trimming drive rod are in initial state, two driven pins are born against on corresponding basic circle face；Stepping electricity
For machine when initial state drives the cam body certain angle clockwise, one of them driven pin enters lift from basic circle face
Curved surface, another driven pin slide on basic circle face；Stepper motor drives the cam body one in initial state counterclockwise
When determining angle, another driven pin enters lifting curve from basic circle face, and a driven pin slides on basic circle face.
2. the driving device of a kind of automatic shearing according to claim 1 and automatic needle-foot-lifting, it is characterised in that: the lift
Presser foot driving cam face and trimming driving cam surface are separately positioned in the both ends of the surface of cam body, and cam body is disk
Shape cam.
3. the driving device of a kind of automatic shearing according to claim 1 or 2 and automatic needle-foot-lifting, it is characterised in that: institute
Stating trimming driving cam surface is the track groove to concave.
4. the driving device of a kind of automatic shearing according to claim 1 or 2 and automatic needle-foot-lifting, it is characterised in that: institute
Stating presser foot lifter driving cam surface includes the first basic circle and the first lifting curve, and first basic circle is arranged concentrically with cam body,
The outside eccentric setting of first lifting curve.
5. the driving device of a kind of automatic shearing according to claim 3 and automatic needle-foot-lifting, it is characterised in that: the rail
Road slot includes the second basic circle and the second lifting curve, and second basic circle is arranged concentrically with cam body, the second lifting curve to
The central protuberance of cam ring ontology.
6. the driving device of a kind of automatic shearing according to claim 5 and automatic needle-foot-lifting, it is characterised in that: the rail
Road slot further includes the third lifting curve extended to the first basic circle head end, and the periphery of third lifting curve to the cam body is convex
Out.
7. the driving device of a kind of automatic shearing according to claim 4 and automatic needle-foot-lifting, it is characterised in that: described
The junction of one basic circle and the first lifting curve position-arresting part one with outward extension.
8. the driving device of a kind of automatic shearing according to claim 1 or 2 and automatic needle-foot-lifting, it is characterised in that: institute
It states and is movably set with the first driven pin in the middle part of presser foot lifter connecting rod, one end of the first driven pin is provided with rotatable
One runner, first runner are moved back and forth along the periphery wall of presser foot lifter driving cam surface.
9. the driving device of a kind of automatic shearing according to claim 1 and automatic needle-foot-lifting, it is characterised in that: described to cut
The second driven pin is movably set in line connecting rod, one end of the second driven pin is provided with rotatable second runner, institute
It states the second runner to be adapted to track groove, second runner is moved back and forth along the inner wall of track groove.
10. the driving device of a kind of automatic shearing according to claim 1 and automatic needle-foot-lifting, it is characterised in that: described
Trimming connecting rod is slidably connected by joining beam and trimming drive rod spherical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143730.XA CN109837660B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610614186.9A CN106012323B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
| CN201910143730.XA CN109837660B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610614186.9A Division CN106012323B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109837660A true CN109837660A (en) | 2019-06-04 |
| CN109837660B CN109837660B (en) | 2021-06-18 |
Family
ID=57114573
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910138764.XA Active CN109680415B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatic thread trimming and automatic presser foot lifting |
| CN201610614186.9A Active CN106012323B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
| CN201910143730.XA Active CN109837660B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910138764.XA Active CN109680415B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatic thread trimming and automatic presser foot lifting |
| CN201610614186.9A Active CN106012323B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN109680415B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021072971A1 (en) * | 2019-10-16 | 2021-04-22 | 浙江美机缝纫机有限公司 | Thread trimming and presser foot mechanism of sewing machine |
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| CN106400340A (en) * | 2016-11-28 | 2017-02-15 | 浙江美机缝纫机有限公司 | Sewing machine starting and presser foot lifting mechanism |
| CN108118450B (en) * | 2016-11-29 | 2020-06-09 | 拓卡奔马机电科技有限公司 | Buttonhole sewing machine |
| CN108118469B (en) * | 2016-11-29 | 2020-06-12 | 拓卡奔马机电科技有限公司 | Buttonhole sewing machine |
| CN106637735B (en) * | 2016-12-07 | 2020-01-31 | 杰克缝纫机股份有限公司 | Thread trimming and presser foot lifting mechanism and sewing machine |
| CN106757831B (en) * | 2016-12-20 | 2019-03-05 | 石狮市伟马智能科技有限公司 | Neckline sewing machine |
| CN107190429B (en) * | 2017-05-10 | 2020-01-14 | 杰克缝纫机股份有限公司 | Sewing machine trimming and presser foot lifting device and sewing machine |
| CN109023736B (en) * | 2018-09-29 | 2023-12-01 | 浙江美机缝纫机有限公司 | Automatic presser foot lifting and wire bonding mechanism and sewing machine |
| CN109537194B (en) * | 2018-11-30 | 2023-10-27 | 浙江翔科缝纫机股份有限公司 | Sewing machine and automatic presser foot lifting and thread cutting control method |
| CN111501222B (en) * | 2019-01-31 | 2021-12-21 | 浙江杰克智能缝制科技有限公司 | Thread trimming and stitch length adjusting device of sewing machine and sewing machine |
| CN109554849A (en) * | 2019-02-02 | 2019-04-02 | 叶朋成 | A kind of automatic shearing of flat seam machine and the synchronization mechanism of automatic needle-foot-lifting |
| CN110468506A (en) * | 2019-07-26 | 2019-11-19 | 上海鲍麦克斯电子科技有限公司 | A kind of control system of full-automatic flat seaming machine |
| CN112391745B (en) * | 2019-08-17 | 2022-09-09 | 杰克科技股份有限公司 | Presser foot lifting and trimming driving structure of sewing machine and control method thereof |
| CN110878450B (en) * | 2019-12-23 | 2021-11-02 | 杰克缝纫机股份有限公司 | Sewing machine trimming lifting presser foot and presser foot pressure adjusting device and sewing machine |
| CN114150446A (en) * | 2020-09-07 | 2022-03-08 | 杰克科技股份有限公司 | Sewing machine trimming and presser foot lifting device and sewing machine |
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| JP2007014810A (en) * | 2006-10-26 | 2007-01-25 | Juki Corp | Sewing machine |
| CN101519834A (en) * | 2009-03-16 | 2009-09-02 | 中捷缝纫机股份有限公司 | Trimming, pressure-lifting and linear-sweeping drive mechanism in sewing machine |
| CN101634086A (en) * | 2009-06-06 | 2010-01-27 | 浙江新杰克缝纫机股份有限公司 | Novel driving structure of sewing machine for thread trimming and presser foot lift |
| CN201395702Y (en) * | 2009-06-06 | 2010-02-03 | 浙江新杰克缝纫机股份有限公司 | Dual motor drive structure for trimming and lifting presser foot for electronic tacking machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021072971A1 (en) * | 2019-10-16 | 2021-04-22 | 浙江美机缝纫机有限公司 | Thread trimming and presser foot mechanism of sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106012323B (en) | 2020-10-09 |
| CN109837660B (en) | 2021-06-18 |
| CN106012323A (en) | 2016-10-12 |
| CN109680415A (en) | 2019-04-26 |
| CN109680415B (en) | 2021-11-16 |
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Denomination of invention: A driving device for automatic thread cutting and automatic presser foot lifting Effective date of registration: 20210913 Granted publication date: 20210618 Pledgee: Zhejiang Tailong commercial bank Taizhou branch of Limited by Share Ltd. Pledgor: ZHEJIANG DUMA SEWING MACHINE Co.,Ltd. Registration number: Y2021330001536 |
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