CN108625048A - The lift tooth material feeding driving mechanism and sewing machine of sewing machine - Google Patents
The lift tooth material feeding driving mechanism and sewing machine of sewing machine Download PDFInfo
- Publication number
- CN108625048A CN108625048A CN201710164198.0A CN201710164198A CN108625048A CN 108625048 A CN108625048 A CN 108625048A CN 201710164198 A CN201710164198 A CN 201710164198A CN 108625048 A CN108625048 A CN 108625048A
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- CN
- China
- Prior art keywords
- rock shaft
- crank
- lifting rock
- feed lifting
- sewing machine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The present invention provides a kind of bind comprising following steps：1）The default distance stitched at last needle to the selvedge of sew cloth material is the first distance value, presets second distance value, and second distance value is more than the first distance value；2）During sewing, control system detect the selvedge of sew cloth material at needle falling hole at a distance from for second distance value when, it is sewed to the residual needle sum needed at selvedge according to first distance value and the second distance value to calculate needle, while controlling needle and being sewed by the residual needle sum；3）After the completion of sewing, into waiting for shearing condition.The present invention improves sewing efficiency.
Description
Technical field
The present invention relates to the lift tooth feeding actuation techniques of sewing machine, the lift tooth feeding more particularly to a kind of sewing machine drives
Mechanism and sewing machine.
Background technology
In traditional sewing machine structure, main motor (servo motor) is connected with main shaft 1.As shown in Figure 1, main motor drives master
The rotation of axis 1 rotates to the eccentric wheel 2 that driving is fixed on main shaft；The rotation driving work feed of eccentric wheel 2 connecting rod 8 and lift tooth connecting rod 3
Movement；Work feed connecting rod 8 drives cloth pushing shaft 7 to rotate through swinging holder assembly 11, and lift tooth connecting rod 3 drives feed lifting rock shaft 5 to put through feed lifting rock shaft crank 4
It is dynamic；The retainer 9 that the wobble drive of cloth pushing shaft 7 is fixed on cloth pushing shaft 7 swings to provide level of approximation direction for feed dog 12
Movement；Feed lifting rock shaft 5, which is swung, drives the feed lifting fork 6 being fixed on feed lifting rock shaft 5 to swing to provide approximation or more for feed dog 12
The movement in direction.
The final track of feed dog 12 known to above structure is by the horizontal fortune in the front-back direction moved with vertical upper and lower directions
Dynamic circuit connector at into.Since the synchronized relation of lift tooth and work feed is determined not adjusting by 2 size of eccentric wheel.Therefore the same sewing machine
Structure only has a kind of work feed track, can not arbitrarily adjust.
It follows that the work feed of conventional sewing machine and lift tooth driving structure are more complex, and work feed track can not be adjusted,
It is not ideal enough to the thickness adaptability of fabric.
Therefore, it is necessary to a kind of work feeds of the sewing machine of adjustable work feed track and lift tooth driving structure.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of lift tooth feeding of sewing machine drives
Motivation structure and sewing machine, for solving the problems, such as that work feed track is nonadjustable in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a kind of lift tooth material feeding driving mechanism of sewing machine,
It includes lift tooth driving mechanism and material feeding driving mechanism, lifts tooth driving mechanism, including the driving motor of Double-directional rotary and driving electricity
The connected transmission linkage of machine, transmission linkage are connected with one end of retainer, and driving motor drives retainer by being driven linkage
It pumps；Material feeding driving mechanism includes the feed spool being connected with spindle drive with the main shaft that is connected of sewing main motor,
Feed spool is connected with the other end of retainer, and sewing main motor drives retainer front-rear reciprocation movement by feed spool.
Preferably, the transmission linkage includes driving crank, first connecting rod, wobble crank, feed lifting rock shaft and lift tooth bar group
One end of part, the driving crank is connected with the driving motor, turns around the axis of driving motor under the driving of driving motor
It is dynamic, drive the other end of crank hinged with first connecting rod, first connecting rod is hinged with the wobble crank, wobble crank and feed lifting rock shaft
One end fix, the other end of feed lifting rock shaft is connected with lift tooth bar component, and lift tooth bar component and one end of the retainer are hinged.
Preferably, the lift tooth bar component includes lift tooth connecting rod and feed lifting rock shaft crank, one end of the feed lifting rock shaft crank with it is described
The other end of feed lifting rock shaft is fixed, and the other end of feed lifting rock shaft crank and one end of the retainer are hinged.
Preferably, one end of the feed lifting rock shaft crank has the through-hole of the other end of the fixed feed lifting rock shaft.
Preferably, the transmission linkage includes drive link, intermediate connecting rod, swing connecting bar, feed lifting rock shaft and feed lifting rock shaft crank
Component, the drive link are connected with the driving motor, are rotated around the axis of driving motor under the driving of driving motor, drive
Dynamic connecting rod, intermediate connecting rod and swing connecting bar are hinged successively, and swing connecting bar and one end of the feed lifting rock shaft are fixed, feed lifting rock shaft it is another
One end is connected with the feed lifting rock shaft crank component, and feed lifting rock shaft crank component is connected with one end of the retainer.
Preferably, the feed lifting rock shaft crank component includes feed lifting rock shaft crank and the sliding block with feed lifting rock shaft crank sliding setting, the lift
The groove that tooth crank has through-hole and intersects with through-bore axis, the other end of the feed lifting rock shaft are fixed in the through-hole, institute
It states sliding block sliding to be set in groove, and one end of sliding block and the retainer is hinged.
Preferably, the material feeding driving mechanism further includes the feeding eccentric wheel being fixed on the main shaft, and and feeding
The hinged feeding connecting rod of eccentric wheel, the hinged feeding crank with the feeding connecting rod, the feeding crank are solid with the feed spool
It is fixed to be connected.
The present invention also provides a kind of sewing machine, the sewing machine has the lift tooth feeding driving machine of sewing machine as described above
Structure.
As described above, the lift tooth material feeding driving mechanism and sewing machine of the sewing machine of the present invention, have the advantages that：This
Invention is moved up and down using independent driving motor driving retainer, completes lift tooth, realizes the lift tooth amount for quickly adjusting retainer,
To with material feeding driving mechanism be coordinated, have the function that change feeding tooth feeding track, to adapt to different sewings.
Description of the drawings
Fig. 1 is shown as sewing machine feed lifting feed mechanism schematic diagram in the prior art.
Fig. 2 is shown as the lift tooth material feeding driving mechanism first embodiment schematic diagram of the sewing machine of the present invention.
Fig. 3 is shown as lifting tooth bar component diagram in the first embodiment of the present invention.
Fig. 4 is shown as the lift tooth material feeding driving mechanism second embodiment schematic diagram of the sewing machine of the present invention.
Fig. 5 is shown as the feed lifting rock shaft crank component diagram of the present invention.
Component label instructions
1 main shaft
2 eccentric wheels
3 lift tooth connecting rods
4 feed lifting rock shaft cranks
5 feed lifting rock shafts
6 feed lifting forks
7 cloth pushing shafts
8 work feed connecting rods
9 retainers
11 swing holder assembly
12 feed dogs
13 feeding eccentric wheels
14 feeding connecting rods
15 feeding cranks
16 feed spools
17 retainers
18 driving motors
19 intermediate connecting rods
20 swing connecting bars
21 feed lifting rock shafts
22 drive links
23 feed lifting rock shaft cranks
231 grooves
232 through-holes
24 sliding blocks
25 cam pins
26 connecting cranks
27 driving cranks
28 first connecting rods
29 wobble cranks
30 feed lifting rock shafts
31 feed lifting rock shaft cranks
32 lift tooth connecting rods
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this explanations by particular specific embodiment below
Content disclosed by book understands other advantages and effect of the present invention easily.
It please refers to Fig.1 to Fig. 5.It should be clear that structure, ratio, size etc. depicted in this specification institute attached drawing, only to
Coordinate the revealed content of specification, so that those skilled in the art understands and reads, being not limited to the present invention can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, should all still fall in disclosed skill
In the range of art content can cover.Meanwhile in this specification it is cited as "upper", "lower", "left", "right", " centre " and
The term of " one " etc. is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, relativeness
It is altered or modified, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the present invention.
As shown in Figures 2 to 5, the present invention provides a kind of lift tooth material feeding driving mechanism of sewing machine comprising lift tooth driving
Mechanism and material feeding driving mechanism, wherein
Lift tooth driving mechanism, including the driving motor 18 of Double-directional rotary, the transmission linkage that is connected with driving motor 18, biography
Lever mechanism is connected with one end of retainer 17, and driving motor 18 drives retainer 17 to pump by being driven linkage；
Material feeding driving mechanism, includes the main shaft 1 being connected with sewing main motor, is driven the feed spool 16 being connected with main shaft 1, send
Material axis 16 is connected with the other end of retainer 17, and sewing main motor drives 17 front-rear reciprocation movement of retainer by feed spool 16.
The present invention drives retainer to pump using independent driving motor 18, makes the drive motion of lift tooth and send
Material driving mechanism is driven using different motors, and the lift tooth amount for quickly adjusting retainer is realized with this, thus and feeding driving machine
Structure is coordinated, and has the function that change feeding tooth feeding track, to adapt to different sewings
As an embodiment of above-mentioned lift tooth driving mechanism, see shown in Fig. 4 and Fig. 5, the transmission linkage in the present embodiment
Including driving crank 27, first connecting rod 28, wobble crank 29, feed lifting rock shaft 30 and lift tooth bar component, the one of the driving crank 27
End is connected with the driving motor 18, is rotated around the axis of driving motor 18 under the driving of driving motor 18, drives crank 18
The other end and first connecting rod 28 it is hinged, first connecting rod 28 is hinged with the wobble crank 29, wobble crank 29 and feed lifting rock shaft 30
One end fix, the other end of feed lifting rock shaft 30 is connected with lift tooth bar component, and lift tooth bar component and one end of the retainer 17 are hinged.
The present embodiment uses toggle, by driving the rotation of crank to realize the lifting and swinging of feed lifting rock shaft, with this passing power
To retainer, pumping for retainer is realized, that is, complete lift agomphiasis and make.
Above-mentioned lift agomphiasis is better achieved to make, the lift tooth bar component in the present embodiment can be that lift tooth connecting rod 32 and lift tooth are bent
Handle 31, one end of feed lifting rock shaft crank 31 and the other end of feed lifting rock shaft 30 are fixed, one end of the other end and retainer 17 of feed lifting rock shaft crank 31
It is hinged.Using the bending of itself of feed lifting rock shaft crank 31 in the present embodiment, the driving to 17 oscilaltion of retainer is preferably realized.
To realize being fixedly connected for feed lifting rock shaft and feed lifting rock shaft crank, one end of the feed lifting rock shaft crank 31 in the present embodiment has fixed
The through-hole of the other end of feed lifting rock shaft 30 need to only extend to the other end of feed lifting rock shaft in through-hole, and preferably to realize the tight of the two
Gu there is fastener in the side of through-hole, through-hole internal diameter can be reduced by the adjusting of fastener, make it that feed lifting rock shaft limit to exist
In through-hole.
The lift tooth driving principle of the present embodiment is：The output shaft of driving motor 18 at an angle in one direction and with
This side is reciprocating in the opposite direction, to drive driving crank 27 to make reciprocally swinging.By being hinged on driving crank
First connecting rod 28 on 27, transfers the motion to wobble crank 29, and the reciprocating motion of wobble crank 29 drives feed lifting rock shaft 30 to carry out
Reciprocating rotation.Feed lifting rock shaft crank 31 is fixed on feed lifting rock shaft 30 and reciprocally swinging, and then the up and down motion of realization retainer 17 therewith.
As another embodiment of above-mentioned lift tooth driving mechanism, the present embodiment and a upper embodiment the difference is that：See
Shown in Fig. 2 and Fig. 3, the transmission linkage in the present embodiment includes drive link 22, intermediate connecting rod 19, swing connecting bar 20, lift tooth
Axis 21 and feed lifting rock shaft crank component, the drive link 22 are connected with the driving motor 18, under the driving of driving motor 18 around
The axis of driving motor 18 rotates, and drive link 22, intermediate connecting rod 19 and swing connecting bar 20 are hinged successively, and three forms connecting rod
Structure, swing connecting bar 20 and one end of feed lifting rock shaft 21 are fixed, and the other end of feed lifting rock shaft 21 is connected with feed lifting rock shaft crank component, and lift tooth
Crank assemblies are connected with one end of retainer 17.The biography that driving motor 18 rotates is realized by three-link articulated structure in the present embodiment
It passs, and then realizes swinging up and down for feed lifting rock shaft 21, pumping for retainer 17 is realized with this.
Feed lifting rock shaft crank component in the present embodiment may include feed lifting rock shaft crank 23 and the cunning with the sliding setting of feed lifting rock shaft crank 23
Block 24, the feed lifting rock shaft crank 23 have through-hole 232 and the groove 231 that intersects with through-bore axis, the feed lifting rock shaft 21 it is another
End is fixed in the through-hole 232, and the sliding of the sliding block 24 is set in groove 231, and one end of sliding block 24 and the retainer 17
It is hinged.The present invention is connected using sliding block 24 with the sliding of feed lifting rock shaft crank 23, realizes the setting of the retainer amount of moving up and down.
The principle that tooth drives is lifted in the present embodiment is：The output shaft of driving motor 18 in one direction and with this direction
Opposite direction moves back and forth, to drive drive link 22 back and forth to be transported in the opposite direction in one direction and with this side
It is dynamic, by the intermediate connecting rod 19 being hinged in drive link 22, power is transferred to swing connecting bar 20, swing connecting bar 20 it is reciprocal
Movement drives feed lifting rock shaft 21 to move back and forth, and the up and down motion of retainer is realized by feed lifting rock shaft crank component.
In the present embodiment the output shaft of driving motor in one direction and with this side in the opposite direction primary reciprocal
Movement, the rotation of cooperation sewing main motor, you can be converted to the reciprocating motion twice of retainer, such mode can substantially reduce motor
Load, increase the service life of motor.And other, using the kind of drive of the present embodiment, it can reach variation sewing work feed
The effect of track greatly improves adaptability of the sewing machine to different fabrics, improves working efficiency.
Lift tooth driving mechanism in the present invention is not limited to above-mentioned two embodiment, and transmission mechanism therein is only needed to realize and be incited somebody to action
The output power of driving motor is transferred to retainer, and can control retainer and complete to move up and down.
As an embodiment of above-mentioned material feeding driving mechanism, see shown in Fig. 2 to Fig. 5, above-mentioned material feeding driving mechanism further includes
The feeding eccentric wheel 13 being fixed on main shaft 1, and the feeding connecting rod 14 hinged with feeding eccentric wheel 13, with the feeding connecting rod
14 hinged feeding cranks 15, the feeding crank 15 are fixedly linked with the feed spool 16.It is inclined using feeding in the present embodiment
Heart wheel realizes the power output of main shaft, and power is transferred to feed spool by feeding connecting rod, feeding crank, then realizes retainer
Front and back reciprocating movement.To realize that the connection of feed spool and retainer, the end of feed spool are installed with connecting crank 26 in the present embodiment,
Connecting crank 26 is hinged by cam pin 25 and retainer 17, and the drive connection of feed spool 16 and retainer is realized with this.
Main motor rotation of sewing drives main shaft 1 to rotate, and the rotation of main shaft 1 drives the rotation of feeding eccentric wheel 13, feeding inclined
The rotation of heart wheel 13 drives feeding connecting rod 14 to move, and the movement of feeding connecting rod 14 drives feeding crank 15 to swing and drives feed spool 16
Reciprocating rotation in a certain range makes retainer 17 do front-rear reciprocation movement.
The present invention also provides a kind of sewing machine, the sewing machine has the lift tooth feeding driving machine of sewing machine as described above
Structure.Lift tooth driving mechanism in the present invention is used as power source using driving motor 18, and material feeding driving mechanism is using main electricity of sewing
Machine is made as power source, the rotation of feed lifting rock shaft and then the lift agomphiasis for driving retainer 17 to do upper and lower directions, the rotation driving of feed spool
Retainer 17 does feeding action in the front-back direction, the final work feed track for synthesizing feed dog.
Above-mentioned driving motor can be stepper motor, realize that tooth is lifted in stepping, stepping lift tooth can directly control on retainer
The height of feeding tooth, feeding tooth can directly be fallen when not sewing, and cloth taken out or distributing in this way
Tooth will not be all fed when below to needle to be suspended to.
In conclusion the lift tooth material feeding driving mechanism and sewing machine of the sewing machine of the present invention, using independent driving motor
Retainer is driven to move up and down, completion lift tooth realizes the lift tooth amount for quickly adjusting retainer, to be carried out with material feeding driving mechanism
Cooperation has the function that change feeding tooth feeding track, to adapt to different sewings.So the present invention effectively overcome it is existing
Various shortcoming in technology and have high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (8)
1. a kind of lift tooth material feeding driving mechanism of sewing machine, which is characterized in that including lifting tooth driving mechanism and material feeding driving mechanism,
Lift tooth driving mechanism, including the driving motor of Double-directional rotary, the transmission linkage that is connected with driving motor, transmission linkage
It is connected with one end of retainer, driving motor drives retainer to pump by being driven linkage；
Material feeding driving mechanism includes the main shaft being connected with sewing main motor, the feed spool being connected with spindle drive, feed spool and tooth
The other end of frame is connected, and sewing main motor drives retainer front-rear reciprocation movement by feed spool.
2. the lift tooth material feeding driving mechanism of sewing machine according to claim 1, it is characterised in that：The transmission linkage packet
Include driving crank, first connecting rod, wobble crank, feed lifting rock shaft and lift tooth bar component, one end of the driving crank and the driving
Motor is connected, and is rotated around the axis of driving motor under the driving of driving motor, and the other end of crank is driven to be cut with scissors with first connecting rod
It connects, first connecting rod is hinged with the wobble crank, and one end of wobble crank and feed lifting rock shaft is fixed, the other end and the lift tooth of feed lifting rock shaft
Bar assembly is connected, and lift tooth bar component and one end of the retainer are hinged.
3. the lift tooth material feeding driving mechanism of sewing machine according to claim 2, it is characterised in that：The lift tooth bar component packet
Include lift tooth connecting rod and feed lifting rock shaft crank, one end of the feed lifting rock shaft crank and the other end of the feed lifting rock shaft fix, feed lifting rock shaft crank it is another
One end and one end of the retainer are hinged.
4. the lift tooth material feeding driving mechanism of sewing machine according to claim 3, it is characterised in that：The one of the feed lifting rock shaft crank
Hold the through-hole of the other end with the fixed feed lifting rock shaft.
5. the lift tooth material feeding driving mechanism of sewing machine according to claim 1, it is characterised in that：The transmission linkage packet
Include drive link, intermediate connecting rod, swing connecting bar, feed lifting rock shaft and feed lifting rock shaft crank component, the drive link and the driving motor
It is connected, is rotated around the axis of driving motor under the driving of driving motor, drive link, intermediate connecting rod and swing connecting bar phase successively
Hinged, swing connecting bar and one end of the feed lifting rock shaft are fixed, and the other end of feed lifting rock shaft is connected with the feed lifting rock shaft crank component, and are lifted
Tooth crank assemblies are connected with one end of the retainer.
6. the lift tooth material feeding driving mechanism of sewing machine according to claim 5, it is characterised in that：The feed lifting rock shaft crank component
Sliding block including feed lifting rock shaft crank and with feed lifting rock shaft crank sliding setting, the feed lifting rock shaft crank have through-hole and intersect with through-bore axis
Groove, the other end of the feed lifting rock shaft is fixed in the through-hole, and the sliding block sliding is set in groove, and sliding block with it is described
One end of retainer is hinged.
7. the lift tooth material feeding driving mechanism of sewing machine according to claim 1, it is characterised in that：The material feeding driving mechanism
Further include the feeding eccentric wheel being fixed on the main shaft, and the feeding connecting rod hinged with feeding eccentric wheel, with the feeding
The hinged feeding crank of connecting rod, the feeding crank are fixedly linked with the feed spool.
8. a kind of sewing machine, it is characterised in that：The sewing machine has such as claim 1 to claim 7 any one of them
The lift tooth material feeding driving mechanism of sewing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164198.0A CN108625048A (en) | 2017-03-20 | 2017-03-20 | The lift tooth material feeding driving mechanism and sewing machine of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164198.0A CN108625048A (en) | 2017-03-20 | 2017-03-20 | The lift tooth material feeding driving mechanism and sewing machine of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108625048A true CN108625048A (en) | 2018-10-09 |
Family
ID=63686333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710164198.0A Pending CN108625048A (en) | 2017-03-20 | 2017-03-20 | The lift tooth material feeding driving mechanism and sewing machine of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108625048A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111197202A (en) * | 2020-03-19 | 2020-05-26 | 杰克缝纫机股份有限公司 | Feed lifting shaft assembly and sewing machine with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1256647A3 (en) * | 2001-05-09 | 2004-12-01 | Schips Ag Nähautomation | Method for operating a sewing machine with upper and lower transport bands |
| CN102154787A (en) * | 2011-04-07 | 2011-08-17 | 上海富山精密机械科技有限公司 | Dual-motor driven computerized sewing machine |
| CN105088547A (en) * | 2015-09-30 | 2015-11-25 | 杰克缝纫机股份有限公司 | Dog lifting feeding mechanism of sewing machine and sewing machine |
| CN105113136A (en) * | 2015-09-30 | 2015-12-02 | 杰克缝纫机股份有限公司 | Feed mechanism of sewing machine and sewing machine |
| CN105113152A (en) * | 2015-09-30 | 2015-12-02 | 杰克缝纫机股份有限公司 | Sewing machine |
-
2017
- 2017-03-20 CN CN201710164198.0A patent/CN108625048A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1256647A3 (en) * | 2001-05-09 | 2004-12-01 | Schips Ag Nähautomation | Method for operating a sewing machine with upper and lower transport bands |
| CN102154787A (en) * | 2011-04-07 | 2011-08-17 | 上海富山精密机械科技有限公司 | Dual-motor driven computerized sewing machine |
| CN105088547A (en) * | 2015-09-30 | 2015-11-25 | 杰克缝纫机股份有限公司 | Dog lifting feeding mechanism of sewing machine and sewing machine |
| CN105113136A (en) * | 2015-09-30 | 2015-12-02 | 杰克缝纫机股份有限公司 | Feed mechanism of sewing machine and sewing machine |
| CN105113152A (en) * | 2015-09-30 | 2015-12-02 | 杰克缝纫机股份有限公司 | Sewing machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111197202A (en) * | 2020-03-19 | 2020-05-26 | 杰克缝纫机股份有限公司 | Feed lifting shaft assembly and sewing machine with same |
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Application publication date: 20181009 |
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