CN106637707A - Cloth feeding mechanism of sewing machine - Google Patents

Cloth feeding mechanism of sewing machine Download PDF

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Publication number
CN106637707A
CN106637707A CN201611177750.1A CN201611177750A CN106637707A CN 106637707 A CN106637707 A CN 106637707A CN 201611177750 A CN201611177750 A CN 201611177750A CN 106637707 A CN106637707 A CN 106637707A
Authority
CN
China
Prior art keywords
eccentric wheel
ratchet
main shaft
base
sewing machine
Prior art date
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.)
Granted
Application number
CN201611177750.1A
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Chinese (zh)
Other versions
CN106637707B (en
Inventor
芈韶雷
宋国庆
吴平
赵林蔚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jack Technology Co Ltd
Original Assignee
Jack Sewing Machine Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jack Sewing Machine Co Ltd filed Critical Jack Sewing Machine Co Ltd
Priority to CN201611177750.1A priority Critical patent/CN106637707B/en
Publication of CN106637707A publication Critical patent/CN106637707A/en
Application granted granted Critical
Publication of CN106637707B publication Critical patent/CN106637707B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B27/00Work-feeding means
    • D05B27/02Work-feeding means with feed dogs having horizontal and vertical movements
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B69/00Driving-gear; Control devices
    • D05B69/02Mechanical drives

Abstract

The invention discloses a cloth feeding mechanism of a sewing machine and belongs to the technical field of sewing machines. By means of the cloth feeding mechanism, the problem that an original cloth feeding mechanism of the sewing machine is narrow in application range is solved. The cloth feeding mechanism of the sewing machine comprises a main shaft which is sleeved with a stitch length eccentric wheel, a first eccentric wheel is arranged on the outer side of the stitch length eccentric wheel, the first eccentric wheel is internally provided with a first sliding groove, the stitch length eccentric wheel can slide in the first eccentric wheel, the sliding direction in which the stitch length eccentric wheel slides in the first eccentric wheel is eccentrically arranged relative to the first eccentric wheel, and a cloth feeding connecting rod is arranged outside the stitch length eccentric wheel in a sleeving mode; a base is arranged on the main shaft in a sleeving mode, and the first eccentric wheel is arranged on the base in a sliding mode in the radial direction of the main shaft; a clutch mechanism is arranged between the base and the main shaft. Due to the arrangement of the clutch mechanism between the base and the main shaft, the inclination angle of the elliptical motion track of a cloth feeding dog can be conveniently adjusted by means of the cloth feeding mechanism.

Description

Work-feeding mean of sewing machine
Technical field
The invention belongs to sewing machine technique field, is related to work-feeding mean of sewing machine.
Background technology
Chinese utility model patent (Authorization Notice No.:CN204097699U, authorized announcement date:20160114) one is disclosed Plant overedger cloth feeding mechanism.Mention existing overedger cloth feeding mechanism in its background technology, including it is main shaft, work feed eccentric wheel, little Eccentric wheel, eccentric wheel, the first needle bearing, work feed connecting rod, needle gage eccentric wheel, the 4th pivot pin, screw, slide block, external toothing, bullet Spring, cloth feeding crank, cloth pushing shaft.Wherein first by eccentric wheel, the first needle bearing, work feed connecting rod, needle gage eccentric wheel, the 4th pivot pin, Screw, spring assembling are an entirety (A parts), wherein an also little spring piece.First work feed eccentric wheel is enclosed within into master during installation On axle, after by small eccentricity wheel be arranged on work feed eccentric wheel on, then by A parts be arranged on main shaft on, while ensure small eccentricity wheel It is cylindrical work good with eccentric wheel, then slide block is placed in the chute of needle gage eccentric wheel, external toothing is installed, then by bullet Spring pulls outward, and makes spring push down slide block.It is last again each eccentric wheel relative position is fixed with specific harness after, with screw by work feed Eccentric wheel is fixed on main shaft with external toothing.Wherein by operating to slide block, it is possible to achieve the adjustment of needle gage.
Existing work-feeding mean of sewing machine is similar to said structure.When sewing machine is assembled, lead between work feed eccentric wheel and main shaft Cross screw to fix, the inclination angle of the running orbit of feed dog and horizontal direction when the status requirement directly defines sewing.For The lifting that at present sewing tech is required, simple a certain ellipse inclined trajectory can not fully meet the different classes of cloth in market Sewing.In this cloth feeding mechanism, be susceptible to levels cloth dislocation, same machine cannot be while meet knitting and shuttle Knit, cloth not fold or the low sewing defect of work feed efficiency.Therefore, this cloth feeding mechanism cannot in use to work feed The inclination angle of track is adjusted, and its scope of application is narrower.
The content of the invention
The purpose of the present invention is for the problems referred to above, it is proposed that a kind of wider work-feeding mean of sewing machine of scope of application.
The purpose of the present invention can be realized by following technical proposal:
Work-feeding mean of sewing machine, including main shaft, are arranged with needle gage eccentric wheel on main shaft, it is characterised in that the needle gage is inclined Heart wheel outside is provided with eccentric wheel one, the eccentric wheel one with chute one and needle gage eccentric wheel can slide in chute one, and Glide direction of the needle gage eccentric wheel in chute one is arranged with work feed outward relative to the eccentric setting of eccentric wheel one, the eccentric wheel one Connecting rod;Base is arranged with the main shaft, the eccentric wheel one is radially slidably arranged on base along main shaft;The base and master Clutch is provided between axle.
As general cloth feeding mechanism, the needle gage of sewing machine is can adjust at needle gage eccentric wheel.In sewing machine running, Under the mating reaction of main shaft, needle gage eccentric wheel and eccentric wheel, when the shaft rotates, work feed connecting rod periodic wobble is driven, Work feed connecting rod periodically drives the retainer motion in sewing machine, so as to complete work feed action.An eccentric part on main shaft drives The part up and down motion of retainer, in addition, work feed connecting rod is in swing process, also drives moving forward and backward and another part for retainer Move up and down.
When the Slope angle adjustment to the feed dog elliptical trajectory of sewing machine is needed, clutch is adjusted so that bottom Seat is separated with main shaft, is rotated further main shaft, and eccentric wheel one rotates relative to main shaft, simultaneously as eccentric wheel one, needle gage is inclined There is the movement along main shaft radial direction relative to base in the matching relationship between heart wheel and main shaft, eccentric wheel one.Hereafter, clutch is decontroled Mechanism so that base and main shaft relative positioning again.So, that is, feed dog elliptical trajectory inclining with respect to the horizontal plane is completed Rake angle, so that sewing machine disclosure satisfy that the purposes that the different sewings of different classes of cloth are required so that sewing machine it is suitable It is wider with scope.
In above-mentioned work-feeding mean of sewing machine, described clutch includes ratchet, and described ratchet is fixed on main shaft On, radially slide along main shaft on the base and be provided with ratchet, it is provided with spring between ratchet and base, and under the action of the spring, Ratchet is engaged on ratchet.
When needing to adjust feed dog elliptical trajectory inclination angle, ratchet is promoted so as to band pawl is along main shaft radial direction phase For base slides, so that ratchet departs from the engagement with ratchet.As needed, by the angle that main axis are certain, make Base rotates relative to main shaft, so that the elliptical trajectory angle of inclination of feed dog changes, finally, unclamps spine Pawl, under the action of the spring, ratchet is engaged on ratchet again so that base is mutually positioned again with main shaft, its adjust operation compared with For convenience.
In above-mentioned work-feeding mean of sewing machine, there is chute two on described base, described detent slide is arranged on In chute two, the glide direction in described chute two along ratchet is provided with oil groove.
Oil groove is set between base and ratchet, facilitates lubricating oil to enter between ratchet and the contact surface of base, so as to side Just ratchet slides on base.
In above-mentioned work-feeding mean of sewing machine, substantially in annular shape, the outside of described base has described base Recess, the one end of the ratchet in glide direction is located at indent, and the ratchet end higher than notched bottoms and less than base circle Ring-type outside;Sewing machine includes frame, and frame is provided with push rod, and the position of the push rod is corresponding with ratchet and indent.
When needing to adjust feed dog elliptical trajectory angle of inclination, push rod is pressed, in general, push rod is inner first It is resisted against on the outside of base, is rotated further main shaft, push rod is inner in the recess of base, now, stops main axis, after Continuous to promote push rod so that the inner of push rod is touched on ratchet, then band pawl leaves ratchet.Because the ratchet end is higher than recessed Mouthful bottom, recess lowest point plays position-limiting action to push rod, and anti-throw-out lever is excessively moved so that the structure of cloth feeding mechanism compared with It is stable.In addition, the ratchet end is less than the circular outside of base, this difference in height plays a buffering between push rod and ratchet and makees With so as to protect ratchet.
In above-mentioned work-feeding mean of sewing machine, described needle gage eccentric wheel outside is arranged with stop collar, the stop collar Between needle gage eccentric wheel and eccentric wheel one, there is the plane one matched with chute one on described stop collar.
Due to having the plane one matched with chute one on stop collar, therefore, stop collar can only be in eccentric wheel one Translation in chute one.In addition, needle gage eccentric wheel is located in stop collar, needle gage eccentric wheel can be rotated in stop collar.
Compared with prior art, this work-feeding mean of sewing machine is between base and main shaft due to being provided with clutch, because This, can conveniently adjust the angle of inclination of feed dog elliptical trajectory.
Description of the drawings
Fig. 1 is a kind of structural representation of embodiment of cloth feeding mechanism;
Fig. 2 is the explosive view of the structure at work feed connecting rod;
Fig. 3 is the structural representation of a state at work feed connecting rod;
Fig. 4 is the structural representation of another state at work feed connecting rod;
Fig. 5 is sectional view at work feed connecting rod;
In figure, 1, main shaft;2nd, needle gage eccentric wheel;3rd, eccentric wheel one;31st, chute one;4th, work feed connecting rod;5th, base;51st, it is sliding Groove two;52nd, oil groove;53rd, recess;6th, ratchet;7th, ratchet;8th, push rod;9th, stop collar;91st, plane one;10th, feed dog;11st, tooth Frame.
Specific embodiment
As shown in figure 1, this work-feeding mean of sewing machine includes the main shaft 1 being arranged in sewing machine frame.
As depicted in figs. 1 and 2, in the present embodiment, ratchet 6, base 5, bias are from left to right arranged with main shaft 1 successively One 3, work feed connecting rod 4 and needle gage eccentric wheel 2 are taken turns, the outside of needle gage eccentric wheel 2 is arranged with stop collar 9, and stop collar 9 is located at eccentric wheel In one 3.Wherein, ratchet 6, base 5, eccentric wheel 1, needle gage eccentric wheel 2 and stop collar 9 cover in annular shape on work feed connecting rod 4 The one end on eccentric wheel 1 is located at also in annular shape.One end of eccentric wheel 1 is radially slidably arranged on base 5 along main shaft.
Specifically, as shown in figure 5, having chute 1 and needle gage eccentric wheel 2 to slide in chute 1 in eccentric wheel 1 It is dynamic, and glide direction of the needle gage eccentric wheel 2 in chute 1 is relative to the eccentric setting of eccentric wheel 1.On stop collar 9 have with The plane 1 that chute 1 matches.Due to having the plane 1 matched with chute 1 on stop collar 9, therefore, limit Translate in the chute 1 that position set 9 can only be in eccentric wheel 1.In addition, needle gage eccentric wheel 2 is located in stop collar 9, needle gage is eccentric Wheel 2 can be rotated in stop collar 9.
Clutch is provided between base 5 and main shaft 1.Clutch includes ratchet 6, and ratchet 6 is fixed on main shaft 1, bottom Radially slide along main shaft 1 on seat 5 and be provided with ratchet 7, there is chute 2 51 on base 5, ratchet 7 is slidably arranged in chute 2 51, Glide direction in chute 2 51 along ratchet 7 is provided with oil groove 52.Oil groove 52 is set between base 5 and ratchet 7, facilitates lubricating oil Into between the contact surface of ratchet 7 and base 5, so as to facilitate ratchet 7 to slide on base 5.In addition, between ratchet 7 and base 5 Spring is provided with, and under the action of the spring, ratchet 7 is engaged on ratchet 6.
When needing to adjust 10 elliptical trajectory inclination angle of feed dog, ratchet 7 is promoted so as to band pawl 7 is along main shaft 1 Slide radially with respect to base 5, so that ratchet 7 departs from the engagement with ratchet 6.As needed, main shaft 1 is rotated necessarily Angle, base 5 is rotated relative to main shaft 1 so that the elliptical trajectory angle of inclination of feed dog 10 changes, Finally, ratchet 7 is unclamped, under the action of the spring, ratchet 7 is engaged on ratchet 6 again so that base 5 is again mutually fixed with main shaft 1 Position, it is more convenient that it adjusts operation.
As shown in Figure 3 and Figure 4, substantially in annular shape, the outside of base 5 has recess 53 to base 5, and ratchet 7 is in slip side One end upwards is located at recess 53, and the end of ratchet 7 is higher than the bottom of recess 53 and less than the circular outside of base 5;Sewing machine Including frame, frame is provided with push rod 8, and the position of push rod 8 is corresponding with ratchet 7 and recess 53.
When needing to adjust 10 elliptical trajectory angle of inclination of feed dog, push rod 8 is pressed, in general, in push rod 8 End is first resisted against on the outside of base 5, is rotated further main shaft 1, and push rod 8 is inner in the recess 53 of base 5, now, is stopped Main shaft 1 is rotated, and continues to press on push rod 8 so that the inner of push rod 8 is touched on ratchet 7, and then band pawl 7 leaves ratchet 6. As shown in figure 4, because the end of ratchet 7 is higher than the bottom of recess 53, the lowest point of recess 53 plays position-limiting action, anti-thrust to push rod 8 Bar 8 is excessively mobile, so that the structure of cloth feeding mechanism is relatively stable.In addition, the end of ratchet 7 is less than the circular outside of base 5, This difference in height plays a cushioning effect between push rod 8 and ratchet 7, so as to protect ratchet 7.
As general cloth feeding mechanism, the needle gage of sewing machine is can adjust at needle gage eccentric wheel 2.Needle gage eccentric wheel 2 and main shaft 1 Between be provided with another clutch.In sewing machine running, in main shaft 1, needle gage eccentric wheel 2 and eccentric wheel with cooperation With under, when main shaft 1 is rotated, the periodic wobble of work feed connecting rod 4, work feed connecting rod 4 is driven periodically to drive the retainer in sewing machine 11 motions, so as to complete work feed action.An eccentric part on main shaft 1 drives the part up and down motion of retainer 11, in addition, sending Cloth connecting rod 4 drives moving forward and backward and another part up and down motion for retainer 11 in swing process, also.
When the Slope angle adjustment to the elliptical trajectory of feed dog 10 of sewing machine is needed, clutch is adjusted so that Base 5 is separated with main shaft 1, is rotated further main shaft 1, and eccentric wheel 1 rotates relative to main shaft 1, simultaneously as eccentric wheel one There is the movement along the radial direction of main shaft 1 relative to base 5 in the 3rd, matching relationship between needle gage eccentric wheel 2 and main shaft 1, main shaft 1.This Afterwards, clutch is decontroled so that base 5 and main shaft 1 relative positioning again.So, that is, the elliptical trajectory of feed dog 10 is completed Angle of inclination with respect to the horizontal plane, so that sewing machine disclosure satisfy that the mesh that the different sewings of different classes of cloth are required So that the scope of application of sewing machine is wider.

Claims (5)

1. work-feeding mean of sewing machine, including main shaft (1), is arranged with needle gage eccentric wheel (2), it is characterised in that described on main shaft (1) Needle gage eccentric wheel (2) outside is provided with eccentric wheel one (3), the eccentric wheel one (3) has chute one (31) and needle gage eccentric wheel (2) can slide in chute one (31), and glide direction of the needle gage eccentric wheel (2) in chute one (31) is relative to eccentric wheel one (3) it is arranged with work feed connecting rod (4) outside eccentric setting, the eccentric wheel one (3);Base (5), institute are arranged with the main shaft (1) State eccentric wheel one (3) and radially slide along main shaft (1) and be arranged on base (5);Be provided between the base (5) and main shaft (1) from Close mechanism.
2. work-feeding mean of sewing machine according to claim 1, it is characterised in that described clutch includes ratchet (6), Described ratchet (6) is fixed on main shaft (1), is radially slided along main shaft (1) on the base (5) and is provided with ratchet (7), ratchet (7) spring is provided with and base (5) between, and under the action of the spring, ratchet (7) is engaged on ratchet (6).
3. work-feeding mean of sewing machine according to claim 2, it is characterised in that there is chute two on described base (5) (51), described ratchet (7) is slidably arranged in chute two (51), along the slip side of ratchet (7) in described chute two (51) To being provided with oil groove (52).
4. the work-feeding mean of sewing machine according to Claims 2 or 3, it is characterised in that described base (5) is substantially in annulus Shape, the outside of described base (5) has recess (53), and the one end of the ratchet (7) in glide direction is located at recess (53) Place, and ratchet (7) end is higher than recess (53) bottom and less than the circular outside of base (5);Sewing machine includes frame, in frame Push rod (8) is provided with, the position of the push rod (8) is corresponding with ratchet (7) and recess (53) place.
5. the work-feeding mean of sewing machine according to claim 1 or 2 or 3, it is characterised in that described needle gage eccentric wheel (2) Outside be arranged with stop collar (9), the stop collar (9) between needle gage eccentric wheel (2) and eccentric wheel one (3), described limit There is the plane one (91) matched with chute one (31) on position set (9).
CN201611177750.1A 2016-12-19 2016-12-19 Work-feeding mean of sewing machine Active CN106637707B (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107059267A (en) * 2017-06-16 2017-08-18 杰克缝纫机股份有限公司 A kind of simple take-up governor motion of sewing machine and sewing machine
CN107558015A (en) * 2017-10-23 2018-01-09 杰克缝纫机股份有限公司 A kind of needle gage governor motion of sewing machine and its sewing machine
CN109371575A (en) * 2018-07-11 2019-02-22 杰克缝纫机股份有限公司 The feed device and sewing machine of sewing machine
CN109505072A (en) * 2019-01-14 2019-03-22 杰克缝纫机股份有限公司 The cloth feeding mechanism and sewing machine of sewing machine
CN109706627A (en) * 2019-01-14 2019-05-03 杰克缝纫机股份有限公司 A kind of sewing machine and its feeding mechanism
CN109750422A (en) * 2019-03-15 2019-05-14 杰克缝纫机股份有限公司 The cloth feeding mechanism and sewing machine of sewing machine
CN109778436A (en) * 2019-03-15 2019-05-21 杰克缝纫机股份有限公司 Work feed control mechanism, sewing machine and the work feed control method of sewing machine
CN109881376A (en) * 2019-03-18 2019-06-14 拓卡奔马机电科技有限公司 Sewing length adjustment device and its operational method
CN109972299A (en) * 2019-03-12 2019-07-05 杰克缝纫机股份有限公司 The cloth feeding mechanism and sewing machine of sewing machine
CN110670248A (en) * 2019-11-08 2020-01-10 杰克缝纫机股份有限公司 Adjustable cloth feeding mechanism and sewing machine
CN111020892A (en) * 2019-12-18 2020-04-17 杰克缝纫机股份有限公司 Sewing machine with adjustable tooth track
CN111663254A (en) * 2019-03-05 2020-09-15 杰克缝纫机股份有限公司 Sewing machine and needle pitch adjusting structure thereof
CN111850845A (en) * 2019-04-24 2020-10-30 杰克缝纫机股份有限公司 Sewing machine
CN114000266A (en) * 2020-07-28 2022-02-01 杰克缝纫机股份有限公司 Adjusting structure in cloth feeding mechanism of sewing machine

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JP2000176189A (en) * 1998-12-21 2000-06-27 Brother Ind Ltd Mechanism for suppressing vibration of reverse stitching lever of sewing machine
CN201952612U (en) * 2010-12-10 2011-08-31 精机机械厂股份有限公司 Feed adjusting mechanism for lower cloth feeding tooth
CN202039191U (en) * 2010-12-10 2011-11-16 精机机械厂股份有限公司 Swinging stroke adjusting device of upper auxiliary cloth feeding claw of sewing machine
CN204058891U (en) * 2014-09-30 2014-12-31 浙江万维机械有限公司 A kind of feed dog of Sewing machines rises and falls adjustable apparatus
CN204530136U (en) * 2014-12-01 2015-08-05 精机机械厂股份有限公司 The cloth conveying teeth adjusting device for travel of Sewing machines

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Publication number Priority date Publication date Assignee Title
JP2000176189A (en) * 1998-12-21 2000-06-27 Brother Ind Ltd Mechanism for suppressing vibration of reverse stitching lever of sewing machine
CN201952612U (en) * 2010-12-10 2011-08-31 精机机械厂股份有限公司 Feed adjusting mechanism for lower cloth feeding tooth
CN202039191U (en) * 2010-12-10 2011-11-16 精机机械厂股份有限公司 Swinging stroke adjusting device of upper auxiliary cloth feeding claw of sewing machine
CN204058891U (en) * 2014-09-30 2014-12-31 浙江万维机械有限公司 A kind of feed dog of Sewing machines rises and falls adjustable apparatus
CN204530136U (en) * 2014-12-01 2015-08-05 精机机械厂股份有限公司 The cloth conveying teeth adjusting device for travel of Sewing machines

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107059267B (en) * 2017-06-16 2019-07-12 杰克缝纫机股份有限公司 A kind of simple take-up regulating mechanism of sewing machine and sewing machine
CN107059267A (en) * 2017-06-16 2017-08-18 杰克缝纫机股份有限公司 A kind of simple take-up governor motion of sewing machine and sewing machine
CN107558015A (en) * 2017-10-23 2018-01-09 杰克缝纫机股份有限公司 A kind of needle gage governor motion of sewing machine and its sewing machine
CN107558015B (en) * 2017-10-23 2020-07-07 杰克缝纫机股份有限公司 Sewing machine and needle pitch adjusting mechanism thereof
CN109371575A (en) * 2018-07-11 2019-02-22 杰克缝纫机股份有限公司 The feed device and sewing machine of sewing machine
WO2020134508A1 (en) * 2018-07-11 2020-07-02 杰克缝纫机股份有限公司 Feeding device of sewing machine, and sewing machine
CN109505072A (en) * 2019-01-14 2019-03-22 杰克缝纫机股份有限公司 The cloth feeding mechanism and sewing machine of sewing machine
CN109505072B (en) * 2019-01-14 2021-04-06 杰克缝纫机股份有限公司 Cloth feeding mechanism of sewing machine and sewing machine
WO2020147585A1 (en) * 2019-01-14 2020-07-23 杰克缝纫机股份有限公司 Cloth feeding mechanism of sewing machine and sewing machine
CN109706627A (en) * 2019-01-14 2019-05-03 杰克缝纫机股份有限公司 A kind of sewing machine and its feeding mechanism
CN111663254A (en) * 2019-03-05 2020-09-15 杰克缝纫机股份有限公司 Sewing machine and needle pitch adjusting structure thereof
CN109972299A (en) * 2019-03-12 2019-07-05 杰克缝纫机股份有限公司 The cloth feeding mechanism and sewing machine of sewing machine
CN109972299B (en) * 2019-03-12 2021-12-21 杰克缝纫机股份有限公司 Cloth feeding mechanism of sewing machine and sewing machine
CN109750422A (en) * 2019-03-15 2019-05-14 杰克缝纫机股份有限公司 The cloth feeding mechanism and sewing machine of sewing machine
CN109778436B (en) * 2019-03-15 2021-02-05 杰克缝纫机股份有限公司 Cloth feeding control mechanism of sewing machine, sewing machine and cloth feeding control method
CN109778436A (en) * 2019-03-15 2019-05-21 杰克缝纫机股份有限公司 Work feed control mechanism, sewing machine and the work feed control method of sewing machine
CN109881376A (en) * 2019-03-18 2019-06-14 拓卡奔马机电科技有限公司 Sewing length adjustment device and its operational method
CN109881376B (en) * 2019-03-18 2021-04-27 拓卡奔马机电科技有限公司 Needle pitch adjusting device and operating method thereof
CN111850845A (en) * 2019-04-24 2020-10-30 杰克缝纫机股份有限公司 Sewing machine
CN110670248A (en) * 2019-11-08 2020-01-10 杰克缝纫机股份有限公司 Adjustable cloth feeding mechanism and sewing machine
CN111020892A (en) * 2019-12-18 2020-04-17 杰克缝纫机股份有限公司 Sewing machine with adjustable tooth track
CN111020892B (en) * 2019-12-18 2022-06-21 杰克科技股份有限公司 Sewing machine with adjustable tooth track
CN114000266A (en) * 2020-07-28 2022-02-01 杰克缝纫机股份有限公司 Adjusting structure in cloth feeding mechanism of sewing machine

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