CN103469498B - Large stitch feeding mechanism for sewing machine - Google Patents
Large stitch feeding mechanism for sewing machine Download PDFInfo
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- CN103469498B CN103469498B CN201310417007.9A CN201310417007A CN103469498B CN 103469498 B CN103469498 B CN 103469498B CN 201310417007 A CN201310417007 A CN 201310417007A CN 103469498 B CN103469498 B CN 103469498B
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Abstract
The invention provides a large stitch feeding mechanism for a sewing machine comprising a tooth lift shaft, a feeding shaft, a feeding mechanism and a tooth lift mechanism, wherein the feeding mechanism and the tooth lift mechanism are disposed between the tooth lift shaft and the feeding shaft. The tooth lift shaft drives a feeding eccentric of the feeding mechanism, which is fixed on tooth lift shaft so as to drive a feeding connecting rod, a feeding swing plate and later a feeding crank fixed on the feeding shaft to swing; the feeding mechanism drives a swing arm of a tooth holder fixed on the feeding shaft to swing; the tooth lift shaft drives a tooth lift eccentric of the tooth lift mechanism, which is fixed on the tooth lift shaft so as to drive a tooth lift driving seat to move; the swing of the swing arm of the tooth holder and the moving of the tooth lift driving seat enable a tooth rack and feeding teeth on the tooth rack to present trajectory similar to an oval, wherein the tooth rack is connected with the swing arm and the tooth lift driving seat. The large stitch feeding mechanism for the sewing machine is of swing arm length of 30.47 millimeters and swing angle of 12.6 degrees, so that the range of stitch length of the sewing machine is from 1 to 8 millimeters, and thus, large stitch sewing is realized, the sewing machine of small vibration and low noise can be in line with industry standard with no jitter existing in wrench operation, and stitch length of front stitch and backstitch matches well with each other.
Description
Technical field
The present invention relates to industrial sewing machine technical field, particularly relate to a kind of flat seam machine big needle distance feed mechanism.
Background technology
Industrial sewing machine refers to the Sewing machines making workpiece being applicable to a large amount of production in sewing factory or other industrial departments, and the general motor that adopts is as power source.Industrial sewing machine is certain specific workpiece often, or specificly makes operation and custom-designed for a certain, and tailored version is very strong; Industrial sewing machine, according to different purposes and sewing, per minutely can make 1000-10000 stitching, and production efficiency is high; In addition the stitching made of industrial sewing machine and linear slit firm, uniform, sewing quality is good.
Industrial sewing machine mainly comprises thread take-up mechanism, feed mechanism, string-hooking mechanism, thread take-up tension lever mechanism, needle bar mechanism, presser foot device, cutoff device, boring device, automatic thread wiping device, automatic thread trimming device, automatically stops needle device, Oil sucking device, lubricating arrangement and electric control system.
Flat seam machine is one the most frequently used in industrial sewing machine, for making the not high and seam of stitching quality requirements apart from wider sewing, such as tent, woven bag, canopy cloth etc., general employing can be arranged sews compared with the flat seam machine of big needle distance, to improve sewing speed, enhance productivity, reduce manpower consumption, reduce production cost.In prior art, the maximum needle gage of flat seam machine is generally 4.5mm.Along with progress and the development of science and technology, at present, market also there is the flat seam machine of some average needle gage >=5mm, average needle gage >=the 5mm of flat seam machine realizes by adopting the following two kinds scheme in the market: the eccentric offset of feeding of scheme one, increase feed mechanism, thus increases feeding stroke; The length of scheme two, relatively the feeding crank of reduction feed mechanism, or expand the angle of oscillation that needle gage regulates swing seat, thus increase feeding stroke.The drawback of scheme one is, pressure angle in feed mechanism can be caused to increase, and the interaction force be subject in mechanism becomes large, and being finally reflected in whole flat seam machine is exactly that machine vibration is large, noise large, and when backstitching, the spanner of flat seam machine has jumping phenomena.The drawback of scheme two is, have that pressure angle in scheme one increases that the vibration caused is large, noise is large equally, spanner shake or inflexible problem, in addition owing in fact changing the position of zero-bit in former mechanism, machine there will be just to stitch and backstitches greatly little or just stitching and littlely backstitch large phenomenon, causes and just backstitches the unmatched problem of needle gage.
Summary of the invention
The shortcoming of prior art in view of the above, the technical problem to be solved in the present invention is to provide a kind of vibration of complete machine and noise of making to meet industry standard, just backstitch needle gage coupling, spanner flexibly without the flat seam machine big needle distance feed mechanism of beating, to overcome the above-mentioned defect of prior art.
In order to solve the problems of the technologies described above, the invention provides a kind of flat seam machine big needle distance feed mechanism, comprise the feed lifting rock shaft, a feed spool, the feeding regulating shaft that are parallel to each other; A Tai Ya mechanism is provided with between described feed lifting rock shaft and described feed spool; A feed mechanism is provided with between described feed lifting rock shaft, described feed spool and described feeding regulating shaft;
Described Tai Ya mechanism comprise be fixed on one of described feed lifting rock shaft lift tooth eccentric wheel, be located at described in lift one of tooth eccentric wheel outer rim lift tooth drive seat, be fixed on described feed spool and with the described retainer seat lifted tooth and drive seat relative, described retainer seat comprises a swing arm, described lifting between the tooth driving top of seat and the end of the swing arm of described retainer seat is connected with a retainer, and the top of described retainer is provided with a feeding tooth;
Described feed mechanism comprises the feeding eccentric wheel being fixed on described feed lifting rock shaft, the needle gage being fixed on described feeding regulating shaft regulates swing seat, be fixed on a feeding crank of described feed spool, also comprises two groups of feeding oscillating decks, a feeding connecting rod; One end of described feeding connecting rod is provided with a mounting ring, the mounting ring of described feeding connecting rod one end coordinates with the eccentric outer rim of described feeding, described in the other end of described feeding connecting rod and two groups, one end of feeding oscillating deck is all hinged, wherein the other end of feeding oscillating deck described in a group and described feeding crank hinged, another organizes the other end of described feeding oscillating deck and described needle gage regulates swing seat hinged;
Described feed lifting rock shaft rotate drive described in lift tooth eccentric wheel and described feeding eccentric wheel rotates, described in lift tooth eccentric wheel and drive described retainer to be moved by described Tai Ya mechanism; Described feeding eccentric wheel also drives described retainer to be moved by described feed mechanism simultaneously; Both combine and make described feeding tooth be the orbiting motion of similar ellipse.
Preferably, the gauge range that described feeding tooth provides is 1mm ~ 8mm.
Preferably, the needle gage that described feeding tooth provides is 6.2mm, and the pendulum angle of described feed spool under the eccentric driving of described feeding is 12.6 °, and the swing brachium of described retainer seat is 30.47mm, and the swing brachium of described feeding crank is 18mm.
Preferably, each is organized described feeding oscillating deck and is two pieces, and described feeding crank is clipped in the middle by the two piece described feeding oscillating decks of a group hinged with described feeding crank; The described feeding oscillating deck of another two pieces of organizing regulating swing seat hinged with described needle gage is located at the inner side that described needle gage regulates the two side of swing seat respectively.
Preferably, described in lift tooth eccentric wheel and described tooth of lifting drives between seat and is provided with a bearing, be provided with a bearing between the mounting ring of described feeding connecting rod and described feeding eccentric wheel.
Preferably, lift tooth eccentric wheel and described feeding eccentric wheel described in arrange in 180 ° on described feed lifting rock shaft.
As mentioned above, flat seam machine big needle distance feed mechanism of the present invention, has following beneficial effect:
The angle that described feeding eccentric wheel drives described feed spool to swing is 12.6 °, be compared with in the of 12.38 ° with the feed spool pendulum angle of the feed mechanism of prior art, pendulum angle merely add 0.22 °, pendulum angle can be considered as constant, be reflected in feed mechanism of the present invention, namely the movement locus of described feed mechanism is constant, thus pressure angle does not increase, avoid the interaction force be subject in mechanism and become large, thus adopt the machine vibration of flat seam machine big needle distance feed mechanism of the present invention little, noise is little, in regulation rotating speed, (3000rpm) meets industry standard, and flat seam machine wrench operated is flexible, non-jitter phenomenon, swing brachium because of described retainer seat is 30.47mm, longer than the swing brachium 24mm of prior art many, therefore, gauge range can reach 1mm ~ 8mm, for making the less demanding and seam of stitching apart from wider sewing, the present invention substantially increases sewing speed and production efficiency, decreases manpower consumption, reduces production cost.In addition, owing to this invention ensures that the position of zero-bit in mechanism, so the present invention can ensure that the needle gage just backstitched in each pin position all mates.
Accompanying drawing explanation
Fig. 1 is shown as the structural representation of a kind of flat seam machine big needle distance feed mechanism of the present invention.
Fig. 2 is shown as the feeding crank of a kind of flat seam machine big needle distance feed mechanism of the present invention and the retainer seat arrangement schematic diagram relative to feed spool.
Element numbers explanation
1 feeding eccentric wheel
2 lift tooth drives seat
2a bearing
3 lift tooth eccentric wheel
4 retainers
5 feeding regulating shafts
6 feeding connecting rods
6a bearing
7 needle gages regulate swing seat
8 feeding oscillating decks
9 feeding cranks
10 feed spools
11 retainer seats
12 feeding teeth
13 feed lifting rock shafts
Detailed description of the invention
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this description can understand other advantages of the present invention and effect easily.
Refer to Fig. 1 to Fig. 2.Notice, structure, ratio, size etc. that this description institute accompanying drawings illustrates, content all only in order to coordinate description to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this description as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
As shown in Figure 1, the invention provides a kind of flat seam machine big needle distance feed mechanism, comprise feed lifting rock shaft 13, feed spool 10, the feeding regulating shaft 5 be parallel to each other.A Tai Ya mechanism is provided with between described feed lifting rock shaft 13 and described feed spool 10; A feed mechanism is provided with between described feed lifting rock shaft 13, described feed spool 10 and described feeding regulating shaft 5.
Described Tai Ya mechanism comprise be fixed on one of described feed lifting rock shaft lift tooth eccentric wheel 3, be located at described in lift one of tooth eccentric wheel 3 outer rim lift tooth drive seat 2, be fixed on described feed spool 10 and with the described retainer seat 11 lifted tooth and drive seat 2 relative, described retainer seat 11 comprises a swing arm, described lifting between the tooth driving top of seat 2 and the end of the swing arm of described retainer seat 11 is connected with a retainer 4, and the top of described retainer is provided with a feeding tooth 12; Wherein, tooth eccentric wheel 3 is lifted described in and described tooth of lifting drives between seat 2 and is provided with a bearing 2a.
Described feed mechanism comprises the feeding eccentric wheel 1 being fixed on described feed lifting rock shaft, the needle gage being fixed on described feeding regulating shaft 5 regulates swing seat 7, be fixed on a feeding crank 9 of described feed spool 10, also comprises two groups of feeding oscillating decks 8, feeding connecting rod 6; One end of described feeding connecting rod 6 is provided with a mounting ring, the mounting ring of described feeding connecting rod 6 one end coordinates with the outer rim of described feeding eccentric wheel 1, the other end of described feeding connecting rod 6 is all hinged by one end of feeding oscillating deck 8 described in bearing pin (not shown) and two groups, wherein feeding oscillating deck 8 described in a group the other end by bearing pin (not shown) and described feeding crank 9 hinged, another other end organizing described feeding oscillating deck 8 regulates swing seat 7 hinged by bearing pin (not shown) and described needle gage.Wherein, a bearing 6a is provided with between the mounting ring of described feeding connecting rod 6 and described feeding eccentric wheel 1.Each is organized described feeding oscillating deck 8 and is two pieces, and described feeding crank 9 is clipped in the middle by the two piece described feeding oscillating decks 8 of a group hinged with described feeding crank 9; The described feeding oscillating deck 8 of another two pieces of organizing regulating swing seat 7 hinged with described needle gage is located at the inner side that described needle gage regulates the two side of swing seat 7 respectively.
Lift tooth eccentric wheel 3 described in of the present invention to arrange in 180 ° on described feed lifting rock shaft 13 with described feeding eccentric wheel 1.The gauge range that described feeding tooth 12 provides is 1mm ~ 8mm.
The needle gage that described feeding tooth 12 of the present invention provides is preferably 6.2mm, then the pendulum angle of described feed spool 10 under the driving of described feeding eccentric wheel 1 is 12.6 °, the swing brachium of described retainer seat 11 is 30.47mm, and the swing brachium of described feeding crank 9 is 18mm.
The operation principle of flat seam machine big needle distance feed mechanism of the present invention is: described feed lifting rock shaft 13 rotate drive described in lift tooth eccentric wheel 3 and described feeding eccentric wheel 1 rotates, because of described in lift tooth eccentric wheel 3 and described feeding eccentric wheel 1 center line all with the axial line disalignment of described feed lifting rock shaft 13, described feeding eccentric wheel 1 drives described retainer 4 to be moved by described feed mechanism: it is main movement that described feeding eccentric wheel 1 drives described feeding connecting rod 6 to do to move horizontally by described bearing 6a, described feeding connecting rod 6 drives described feeding oscillating deck 8 hinged with it, described feeding oscillating deck 8 drives described feeding crank 9 to swing around described feed spool 10 again, because described feeding crank 9 and described feed spool 10 are fixed, therefore described feeding crank 9 drives feed spool 10 to swing, the retainer seat 11 being fixed on described feed spool 10 swings with the swing of described feed spool 10, making the swing arm of described retainer seat 11 drive described retainer 4 to occur to move horizontally is main movement.Simultaneously, described tooth eccentric wheel 3 of lifting drives described retainer 4 to be also moved by described Tai Ya mechanism: described in lift tooth eccentric wheel 3 driven by described bearing 2a described in lift tooth and drive seat 2 to move, described retainer 4 is lifted tooth with described to drive seat 2 to occur to move up and down is main movement.Both combine and make described feeding tooth 12 with the orbiting motion of described retainer 4 in similar ellipse.
As can be seen here, the pendulum angle (angle of also i.e. feed spool 10 swing) of the swing arm of described retainer seat 11 determines the stroke of feeding tooth with the swing brachium of retainer seat 11.
The swing brachium that we define retainer seat 11 is L, and the pendulum angle of the swing arm of retainer seat 11 is θ, and needle gage is T, then wherein, K is empirical coefficient to L × θ=T × K(, generally gets K=1.05 ~ 1.2).
In the present invention, preferably, T=6.2mm, L=30.47mm, separately get K=1.08,
Then θ=T × K/L=6.2mm × 1.08/30.47mm=0.22 ⌒=12.6 °.
θ angle of the present invention is 12.6 °, compared with the θ angle of 12.38 ° of the feed mechanism of prior art, angle can be considered as constant, namely flat seam machine big needle distance feed mechanism of the present invention is compared with the feed mechanism of prior art, pressure angle does not increase, thus the present invention is the same with the feed mechanism of prior art, the interaction force be subject to does not increase, thus machine vibration is little, noise is little, in regulation rotating speed, (3000rpm) meets industry standard, and flat seam machine wrench operated is flexible, non-jitter phenomenon.Compared with the maximum needle gage 4.5mm of prior art, gauge range of the present invention can reach 1mm ~ 8mm, and for making the less demanding and seam of stitching apart from wider sewing, the present invention substantially increases sewing speed and production efficiency, decrease manpower consumption, reduce production cost.
It should be noted that: the size of L is not arbitrarily get, as shown in Figure 1, needle gage regulates swing seat 7 to correspond to a zero-bit, and under this zero-bit, corresponding needle gage is 0.And under other pin positions, needle gage regulates swing seat 7 to be departed to both sides by zero-bit respectively when just backstitching.Under same pin position, when just backstitching, needle gage adjustment swing seat 7 should be close relative to the angle of oscillation of zero-bit.Pressure angle approximately equal when so just can ensure just to backstitch, otherwise it is large just to there will be vibration when just stitching or backstitching.By carrying out metering needle with spanner swivel feeding regulating shaft 5 apart from the amplitude of oscillation regulating swing seat 7 with feeding oscillating deck 8, the amplitude of oscillation is larger, and needle gage is also larger.
As mentioned above, zero-bit is a very important position, in order to the zero-bit making the present invention not change prior art, must have such constraints: when feed spool 10 must be positioned at zero-bit feeding crank 9 swinging track on.Thus, as shown in Figure 2, some A place be feeding crank 9 when zero-bit and the pin joint of feeding oscillating deck 8, put the axle center that B place is feed spool 10 of the present invention, point C place is the axle center of the feed spool of prior art, and some D place is the tie point position of retainer seat 11 and retainer 4 when zero-bit.As shown in Figure 2, flat seam machine big needle distance feed mechanism of the present invention is identical with the zero-bit of the feed mechanism of prior art, thus the needle gage that the present invention is just backstitching in each pin position all mates.
In sum, the angle that the described feeding eccentric wheel of flat seam machine big needle distance feed mechanism of the present invention drives described feed spool to swing is 12.6 °, compared with the pendulum angle of 12.38 ° of the feed mechanism of prior art, pressure angle does not increase, thus the present invention is the same with the feed mechanism of prior art, and the interaction force be subject to does not increase, thus machine vibration is little, noise is little, in regulation rotating speed, (3000rpm) meets industry standard, and flat seam machine wrench operated is flexible, non-jitter phenomenon.Compared with the maximum needle gage 4.5mm of prior art, gauge range of the present invention can reach 1mm ~ 8mm, and for making the less demanding and seam of stitching apart from wider sewing, the present invention substantially increases sewing speed and production efficiency, decrease manpower consumption, reduce production cost.In addition, owing to this invention ensures that the position of zero-bit in mechanism, so the present invention can ensure that the needle gage just backstitched in each pin position all mates.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (6)
1. a flat seam machine big needle distance feed mechanism, comprises the feed lifting rock shaft (13), a feed spool (10), the feeding regulating shaft (5) that are parallel to each other; It is characterized in that, between described feed lifting rock shaft (13) and described feed spool (10), be provided with a Tai Ya mechanism; A feed mechanism is provided with between described feed lifting rock shaft (13), described feed spool (10) and described feeding regulating shaft (5);
Described Tai Ya mechanism comprise be fixed on one of described feed lifting rock shaft lift tooth eccentric wheel (3), be located at described in lift one of tooth eccentric wheel (3) outer rim lift tooth drive seat (2), be fixed on described feed spool (10) and with the described retainer seat (11) lifted tooth and drive seat (2) relative, described retainer seat (11) comprises a swing arm, be connected with a retainer (4) between described end of lifting the top of tooth driving seat (2) and the swing arm of described retainer seat (11), the top of described retainer is provided with a feeding tooth (12);
Described feed mechanism comprises the feeding eccentric wheel (1) being fixed on described feed lifting rock shaft, the needle gage being fixed on described feeding regulating shaft (5) regulates swing seat (7), be fixed on a feeding crank (9) of described feed spool (10), also comprises two groups of feeding oscillating decks (8), a feeding connecting rod (6); One end of described feeding connecting rod (6) is provided with a mounting ring, the mounting ring of described feeding connecting rod (6) one end coordinates with the outer rim of described feeding eccentric wheel (1), described in the other end of described feeding connecting rod (6) and two groups, one end of feeding oscillating deck (8) is all hinged, wherein the other end of feeding oscillating deck (8) described in a group and described feeding crank (9) hinged, another organizes the other end of described feeding oscillating deck (8) and described needle gage regulates swing seat (7) hinged;
Described feed lifting rock shaft (13) rotate drive described in lift tooth eccentric wheel (3) and described feeding eccentric wheel (1) rotation, described in lift tooth eccentric wheel (3) and drive described retainer (4) to be moved by described Tai Ya mechanism; Described feeding eccentric wheel (1) also drives described retainer (4) to be moved by described feed mechanism simultaneously; Both combine and make the orbiting motion of described feeding tooth (12) in similar ellipse.
2. flat seam machine big needle distance feed mechanism according to claim 1, is characterized in that: the gauge range that described feeding tooth (12) provides is 1mm ~ 8mm.
3. flat seam machine big needle distance feed mechanism according to claim 2, it is characterized in that: the needle gage that described feeding tooth (12) provides is 6.2mm, the pendulum angle of described feed spool (10) under the driving of described feeding eccentric wheel (1) is 12.6 °, the swing brachium of described retainer seat (11) is 30.47mm, and the swing brachium of described feeding crank (9) is 18mm.
4. flat seam machine big needle distance feed mechanism according to claim 1, it is characterized in that: each is organized described feeding oscillating deck (8) and is two pieces, described feeding crank (9) is clipped in the middle by the two piece described feeding oscillating decks (8) of a group hinged with described feeding crank (9); The described feeding oscillating deck (8) of another two pieces of organizing regulating swing seat (7) hinged with described needle gage is located at the inner side that described needle gage regulates the two side of swing seat (7) respectively.
5. flat seam machine big needle distance feed mechanism according to claim 1, it is characterized in that: described in lift tooth eccentric wheel (3) and described tooth of lifting drives between seat (2) and is provided with a bearing (2a), be provided with a bearing (6a) between the mounting ring of described feeding connecting rod (6) and described feeding eccentric wheel (1).
6. flat seam machine big needle distance feed mechanism according to claim 1, is characterized in that: described in lift tooth eccentric wheel (3) and described feeding eccentric wheel (1) described feed lifting rock shaft (13) is upper and arrange in 180 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310417007.9A CN103469498B (en) | 2013-09-12 | 2013-09-12 | Large stitch feeding mechanism for sewing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310417007.9A CN103469498B (en) | 2013-09-12 | 2013-09-12 | Large stitch feeding mechanism for sewing machine |
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| CN103469498A CN103469498A (en) | 2013-12-25 |
| CN103469498B true CN103469498B (en) | 2015-04-08 |
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| CN201310417007.9A Active CN103469498B (en) | 2013-09-12 | 2013-09-12 | Large stitch feeding mechanism for sewing machine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350186B (en) * | 2015-09-30 | 2018-12-14 | 杰克缝纫机股份有限公司 | Sewing machine feeding mechanism and sewing machine |
| CN107090670B (en) * | 2017-07-05 | 2020-08-21 | 杰克缝纫机股份有限公司 | Thick material sewing machine |
| CN109056197B (en) * | 2018-10-12 | 2024-04-09 | 台州市泓列缝纫机有限公司 | Needle pitch adjustable precision reverse and forward seam driving mechanism of electric sewing machine |
| CN112626725B (en) * | 2019-09-24 | 2022-08-23 | 杰克科技股份有限公司 | Feeding tooth lifting tooth height adjustable mechanism and sewing machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2357023Y (en) * | 1998-06-29 | 2000-01-05 | 蔡荣枝 | Driving structure for feeding mechanism of industrial sewing machine |
| JP4624169B2 (en) * | 2004-09-22 | 2011-02-02 | Ｊｕｋｉ株式会社 | Sewing machine feeder |
| JP2006247044A (en) * | 2005-03-09 | 2006-09-21 | Brother Ind Ltd | Adjusting mechanism of cloth feeding in sewing machine |
| JP2008259752A (en) * | 2007-04-13 | 2008-10-30 | Juki Corp | Feeder of sewing machine |
| CN201512670U (en) * | 2009-08-19 | 2010-06-23 | 曾德松 | Feeding structure of horizontal cylindrical sewing machine |
| CN203475105U (en) * | 2013-09-12 | 2014-03-12 | 新杰克缝纫机股份有限公司 | Large-needle-pitch feeding mechanism of lockstitch sewing machine |
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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |
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