CN104131422B - Sewing machine with adjustable needle bar stroke - Google Patents
Sewing machine with adjustable needle bar stroke Download PDFInfo
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- CN104131422B CN104131422B CN201410384680.1A CN201410384680A CN104131422B CN 104131422 B CN104131422 B CN 104131422B CN 201410384680 A CN201410384680 A CN 201410384680A CN 104131422 B CN104131422 B CN 104131422B
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Abstract
The invention discloses a sewing machine with an adjustable needle bar stroke, and belongs to the technical field of sewing machines. The sewing machine comprises a needle bar, a connection bar, a crank, a main shaft and a motor and further comprises an eccentric link pin. The upper end of the connection bar is connected with the crank through the eccentric link pin, the upper end of the connection bar is provided with an axial through hole, a first shaft is matched in the axial through hole in the connection bar in a rotating mode, the outer end of the first shaft is connected with an adjusting screw in a threaded mode in the axial direction and is cushioned with a limiting gasket for preventing the upper end of the connection bar from axial movement, and a left cover of a machine head at the position where the adjusting screw stretches outwards in the axial direction is provided with a screw hole for a screw driver to be inserted so as to screw the adjusting strew conveniently. The sewing machine with the adjustable needle bar stroke has the advantages of being adjustable in the needle bar stroke, simplifying the adjusting mode, saving oil and the like.
Description
Technical field
The invention belongs to sewing machine technique field, more specifically, it relates to a kind of adjustable sewing machine of needle bar stroke.
Background technology
Sewing machine is to use one or more sewing thread, and one or more stitching is formed on sewing, stitches one or more layers
The machine that material interweaves or unites by a seam.Fabric and leather, plastics, the paper such as sewing function sewing cotton, fiber crops, silk, hair, staple fibre
Deng product, the stitching neat appearance stitched out, it is smooth firmly, sewing velocity is fast, easy to use.General sewing machine is all by head, machine
Seat, transmission and the part of adnexa four composition.Head is the major part of sewing machine, and it is by piercing material, hook line, take-up, four machines of feeding
Structure and coiling, binder, Luo Yadeng auxiliary bodies composition, the motion of each mechanism reasonably coordinates, and circulates work, and sewing is sutured
Come.
Needle bar stroke mechanism on existing sewing machine includes shank, connecting rod, crank and the master being arranged on head of sewing machine
Axle, main shaft is arranged on sewing machine fuselage, and one end of main shaft is connected by bearing with crank, and the other end is by Timing Belt and motor
It is connected, connecting rod one end is connected with crank, and the other end is connected with shank；The rotation of main shaft, the rotational band of main shaft are driven by motor
Dynamic crank is rotated, and crank handle turns connecting rod is moved up and down, is connected with shank due to connecting rod, so as to realize that shank does vertical direction
Move back and forth.
Needle bar stroke refers to that shank in the vertical direction is raised to peak and drops to the displacement between minimum point, and by
Above-mentioned mechanism can be seen that shank in the vertical direction is raised to peak and to drop to this 2 points of minimum point be to change
, that is to say, that needle bar stroke is fixed, it is impossible to adjusted.Sewing machine during actual use, the thickness of cloth of sewing
Differ, and the needle bar stroke of sewing machine is closely bound up with the thickness of sewing cloth, therefore existing sewing machine is certain
Scope of application when machine is thin to expect that middle thick material is changed is limited in degree.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of adjustable sewing machine of needle bar stroke,
The adjustable of needle bar stroke can be realized, while convenient when adjusting.
For achieving the above object, the invention provides following technical scheme：A kind of adjustable sewing machine of needle bar stroke, including
Shank on head of sewing machine, connecting rod, crank, main shaft and motor are arranged on, main shaft is arranged on sewing machine fuselage, the one of main shaft
End is connected by bearing with crank, and the other end is connected by Timing Belt with motor, and small end is connected with crank, lower end and shank
It is connected；The rotation of the rotation of main shaft, main shaft is driven to drive crank to rotate by motor, crank handle turns link rotatable, shank is followed
Connecting rod is realized pumping；Also include eccentric ratio pin, described small end Jing eccentric ratio pins are connected with crank, institute
The eccentric ratio pin stated is removable on crank.
Described eccentric ratio pin is axially connected to form by first axle, inclined disk, the second axle, the axis of first axle and the second axle
Axis is not conllinear, and any point is all higher than the diameter of first axle and the second axle to the horizontal range of inclined disk center on inclined disk circumference；
Small end end is provided with an axially extending bore, and first axle is rotatably assorted in the axially extending bore of connecting rod, the outer end axle of first axle
To being bolted with adjusting screw, and the spacing shim for preventing small end axial float is lined with, adjusting screw extends axially outward place
Head left cover be provided with and be easy to screwdriver insertion to twist the screw of adjusting screw；Second axle is removable with crank to be connected, inclined disk
Circumference is less than large circular arc radius by end to end orthodrome, left straight line, small arc-shaped, right rectilinear(-al), roundlet arc radius, partially
After heart link pin is arranged on crank, crank has a limiting platform face below inclined disk, the left straight line or right straight line of inclined disk with
The limiting platform face of crank offsets.
First axle is rotatably assorted and refers to that first axle is cased with needle bearing in the axially extending bore of connecting rod, and needle bearing coordinates
In the axially extending bore of small end, small end portion is provided with the oil-feed groove being easy to needle bearing fuel feeding, and connecting rod sets in hollow
Put, the lower end of connecting rod is provided with an oil outlet, and oil outlet is communicated with oil-feed groove；The side of connecting rod lower end is hinged with shank bundle
Head, shank is pricked head and is plugged on inside the lower end of connecting rod, and shank pricks head connection oil outlet, and shank is pricked head and is clipped on shank, under connecting rod
The opposite side at end is hinged a slide block, and slide block side is provided with a slide, and slide is fixed in casing, and slide is provided with one vertically
Chute, slide block is fitted snugly within the chute of slide.
Copper sheathing is cased with outside described shank top and bottom, copper sheathing is separately mounted to the head top and bottom of casing.
The second described axle is removable with crank to be connected and refers to there is a circular fixture block on crank, at the opening of circular fixture block
Bolt is provided with, the second axle position realizes the clamping or release of circular fixture block in the circular port of circular fixture block by bolt.
Small arc-shaped radian on described inclined disk is 90 °.
Described first axle is identical with the second shaft diameter.
1-2mm is differed between the axis of described first axle and the second axle axis.
The invention has the beneficial effects as follows：
1st, eccentric ratio pin is increased between small end and crank, one end of eccentric ratio pin is connected with connecting rod, separately
One end is connected with crank, and by rotating eccentric ratio pin the radius of link rotatable is changed, and adjusts realizing the stroke of shank successively
Section.
2nd, the circumference of the inclined disk on eccentric ratio pin is divided into orthodrome, left straight line, small arc-shaped, right straight line, small arc-shaped half
Footpath is less than large circular arc radius, and the orthodrome two ends of inclined disk coordinate the planar table on crank, realizes the spacing of two extreme positions,
Carry out the change of precision range successively.
The 3rd, adjusting screw is set outside the first axle of eccentric ratio pin, and the machine at place is extended axially outward in adjusting screw
Head left cover is provided with screw, and convenient screwdriver insertion screw is twisted adjusting screw, drives eccentric ratio pin to rotate, and realizes shank row
The change of journey, the design enormously simplify the operation that existing needle bar stroke changes, and common operating personnel can be adjusted.
4th, the first axle Jing needle bearing of small end and eccentric ratio pin coordinates and rotates, and reduces friction mill between the two
Damage, it is ensured that degree of regulation, while setting oil-feed groove in the upper end of connecting rod, in the lower end of connecting rod oilhole is set out, realize the company of oil circuit
Logical, the unnecessary lubricating oil stream in upper end to lower end pricks head for the shank of lower end and slide block lubrication is used, and saves the consumption of lubricating oil.
Description of the drawings
Fig. 1 is schematic perspective view of the present invention.
Fig. 2 is enlarged drawing at A in Fig. 1.
Fig. 3 is side schematic view of the present invention.
Fig. 4 is that the present invention removes the side schematic view after left cover.
Fig. 5 is this crank and eccentric ratio pin connection schematic diagram.
Fig. 6 is eccentric ratio pin schematic diagram.
Fig. 7 is crank and eccentric ratio pin connection schematic diagram when needle bar stroke is maximum.
Fig. 8 is A-A sectional views in Fig. 7.
Fig. 9 is crank and eccentric ratio pin connection schematic diagram when needle bar stroke is minimum.
Figure 10 is B-B sectional views in Fig. 9.
Figure 11 is inclined disk schematic diagram.
Reference：1st, head, 1.1, screw, 2, shank, 3, connecting rod, 3.1, axially extending bore, 3.2, oil-feed groove, 3.3,
Oil outlet, 4, crank, 4.1, limiting platform face, 4.2, bolt, 5, eccentric ratio pin, 5.1, first axle, 5.2, inclined disk, 5.2.1,
Orthodrome, 5.2.2, left straight line, 5.2.3, small arc-shaped, 5.2.4, right straight line, the 5.3, second axle, 6, adjusting screw, 7, spacing pad
Piece, 8, shank prick head, 9, slide block, 10, slide, 10.1, chute, 11, copper sheathing.
Specific embodiment
The adjustable sewing machine embodiment of needle bar stroke of the present invention is described further referring to figs. 1 to Figure 11.
Needle bar stroke in sewing machine refers to that shank in the vertical direction is raised to peak and drops between minimum point
Displacement, and the shank in the vertical direction on existing sewing machine be raised to peak with drop to this 2 points of minimum point be cannot
Change, that is to say, that needle bar stroke is fixed, it is impossible to adjusted.Sewing machine during actual use, cloth of sewing
Thickness changes again, so only a kind of sewing machine of needle bar stroke cannot be adapted to, so present invention design is a can be according to need
Voluntarily to adjust the sewing machine of needle bar stroke.The adjustable sewing machine of a kind of needle bar stroke, including being arranged on head of sewing machine 1
Shank 2, connecting rod 3, crank 4, main shaft and motor, main shaft is arranged on sewing machine fuselage, and one end of main shaft is by bearing and crank 4
It is connected, the other end is connected by Timing Belt with motor, and the upper end of connecting rod 3 is connected with crank 4, and lower end is connected with shank 2；By motor
The rotation for driving the rotation of main shaft, main shaft drives crank 4 to rotate, and the drivening rod 3 of crank 4 is rotated, and shank 2 follows connecting rod 3 to realize
Pump.
In order to realize the regulation of the stroke of shank 2, present invention additionally comprises eccentric ratio pin 5, described eccentric ratio pin 5
It is removable to refer to it is that eccentric ratio pin 5 has various installation sites on crank 4 on crank 4, so also imply that partially
When heart link pin 5 is rotated, there are the different radiuses of gyration.Described eccentric ratio pin 5 by first axle 5.1, inclined disk 5.2,
Two axle 5.3 is axially connected to form, and first axle 5.1 is located at the side of inclined disk 5.2, and the second axle 5.3 is located at the opposite side of inclined disk 5.2,
And three is integrally formed.
So-called bias, the axis and the axis of the second axle 5.3 for referring to first axle 5.1 be not conllinear, that is to say, that first axle
5.1 axis and the eccentric axis of the second axle 5.3 are designed, and there is certain deviation axial direction between the two, so design be exactly in order to
Change the radius of gyration (because the upper end of connecting rod 3 is connected with first axle 5.1) of the upper end of connecting rod 3, also imply that connecting rod 3 reaches most
The distance between high point and minimum point increased, and what shank 2 and connecting rod 3 were connected to, then shank 2 peak with it is minimum
The distance between point is also increased, i.e. the stroke of shank 2 increased, and adapt to the cloth of different-thickness.
In order to ensure that inclined disk 5.2 can play position-limiting action of the eccentric ratio pin 5 in two extreme positions, the circumference of inclined disk 5.2
Upper any point is all higher than the diameter of the axle 5.3 of first axle 5.1 and second to the horizontal range at the centers of Pian Pan 5.2, mentioned here
The diameter of disk 5.2 partially also refers to that minimum diameter is all big than the diameter of the axle 5.2 of first axle 5.1 and second；The upper end Jing eccentric ratios of connecting rod 3
Pin 5 is connected with crank 4, and the upper end end of connecting rod 3 is provided with an axially extending bore 3.1, and first axle 5.1 is rotatably assorted in the axle of connecting rod 3
Into through hole 3.1, the second axle 5.3 is removable with crank 4 to be connected.
In order to the convenient stroke for adjusting shank 2, the present invention is specially axially bolted with regulation in the outer end of first axle 5.1
Screw 6, and the spacing shim 7 for preventing the top axial play of connecting rod 3 is lined with, the head 1 that adjusting screw 6 extends axially outward place is left
Cover and be provided with the screw 1.1 for being easy to screwdriver insertion to twist adjusting screw 6；Only need to screwdriver from the screw of the left cover of head 1
1.1 are inserted into, and turn adjusting screw 6, rotate clockwise or counterclockwise, it is possible to the rotation of straight line eccentric ratio pin 5, realize
The change of the upper end radius of gyration of connecting rod 3, is also achieved that the stroke change of shank 2.So screw 1.1 is opened up in the left cover of head 1,
It is very convenient when stroke is adjusted, it is not necessary to take the cover of head 1 and miscellaneous part apart, so that it may realize the regulation of stroke, and
For the operating personnel for adjusting, it is not necessary to which very professional, common machinist can adjust, and adaptability and convenience are wide.
In order to be able to allow inclined disk 5.2 to realize the limit function of its two extreme positions, the circumference of inclined disk 5.2 is by end to end
Orthodrome 5.2.1, left straight line 5.2.2, small arc-shaped 5.2.3, right straight line 5.2.4 composition, small arc-shaped 5.2.3 radiuses be less than great circle
Arc 5.2.1 radiuses, after eccentric ratio pin 5 is arranged on crank 4, crank 4 has a limiting platform face 4.1 in the lower section of inclined disk 5.2,
The left straight line 5.2.2 or right straight lines 5.2.4 of disk 5.2 partially offsets with the limiting platform face 4.1 of crank 4.When stroke is in maximum,
The left straight line 5.2.2 of disk 5.2 partially offsets with the limiting platform face 4.1 of crank 4.It is inclined disk 5.2 or right when stroke is in minimum
Straight line 5.2.4 offsets with the limiting platform face 4.1 of crank 4.
Small arc-shaped 5.2.3 radians partially on disk 5.2 are 90 °, that is to say, that partially disk 5.2 rotates 90 °, so that it may realize shank 2
The minimum and maximum change of stroke.
In order to reduce the friction between first axle 5.1 and the axially extending bore 3.1 of connecting rod 3, turn to match somebody with somebody compactness also for improving
And service life, first axle 5.1 is cased with needle bearing, and needle bearing coordinates in the axially extending bore 3.1 of the upper end of connecting rod 3, connecting rod 3
Upper end is provided with the oil-feed groove 3.2 being easy to needle bearing fuel feeding, and connecting rod 3 is in hollow setting, and the lower end of connecting rod 3 is provided with one
Oil outlet 3.3, oil outlet 3.3 is communicated with oil-feed groove 3.2；The side of the lower end of connecting rod 3 is hinged with shank bundle 8, shank bundle 8
It is plugged on inside the lower end of connecting rod 3, shank pricks a 8 connection oil outlet 3.3, shank bundle 8 is clipped on shank 2, the lower end of connecting rod 3
Opposite side is hinged a slide block 9, and the side of slide block 9 is provided with a slide 10, and slide 10 is fixed in casing, and slide 10 is provided with one
Vertical chute 10.1, slide block 9 is fitted snugly within the chute 10.1 of slide 10.The upper end of connecting rod 3 sets oil-feed groove 3.2, in connecting rod 3
Lower end set out oilhole 3.3, realize the connection of oil circuit, the unnecessary lubricating oil stream in upper end to lower end pricks 8 He for the shank of lower end
The lubrication of slide block 9 is used, and saves the consumption of lubricating oil.
In order to reduce the friction between shank 2 and casing, it is ensured that the service life of shank 2, outside the top and bottom of shank 2
Copper sheathing 11 is cased with, copper sheathing 11 is separately mounted to the top of head 1 and bottom of casing.
For the ease of the regulation of eccentric ratio pin 5, described eccentric ratio pin 5 is removable on crank 4, that is,
Say that the second axle 5.3 is removable with crank 4 to be connected, refer to there is a circular fixture block on crank 4, at the opening of circular fixture block spiral shell is provided with
Bolt 4.2, the second axle 5.3 is located in the circular port of circular fixture block, and by bolt 4.2 clamping or release of circular fixture block are realized.Institute
The first axle 5.1 stated is identical with the diameter of the second axle 5.3.
1-2mm is differed between the axis and the axis of the second axle 5.3 of described first axle 5.1.First axle 5.1 in the present embodiment
Axis and the axis of the second axle 5.3 between differ 1mm.The radius of gyration of the upper end of connecting rod 3 increased 1mm, and diameter is just the increase in
2mm, the stroke of such shank 2 is equivalent to increased 2mm.
The present invention operation principle be：If the stroke of the shank 2 of original state is minimum, as shown in Figure 9 and Figure 10,
When the thicker cloth of thickness of sewing, need to increase needle bar stroke, operate as follows：The bolt 4.2 on crank 4 is unclamped first, that
Eccentric ratio pin 5 can have rotated, then insert the screw 1.1 of the left cover of head 1, end and the regulation of screwdriver by screwdriver
Screw 6 matches, and drives adjusting screw 6 to rotate counterclockwise, and the rotation of adjusting screw 6 has driven turning counterclockwise for eccentric ratio pin 5
Dynamic, the rotation of eccentric ratio pin 5, inclined disk 5.2 also follows rotation, and the left end of the orthodrome 5.2.1 on inclined disk 5.2 on circumference turns
Move until encountering the limiting platform face 4.1 on crank 4, as shown in Figure 7 and Figure 8；Now the axis of first axle 5.1 is than the second axle
5.3 axis high 1mm (eccentric throw set in the present embodiment), so the rotation diameter of the upper end of connecting rod 3 just becomes greatly
2mm, needle bar stroke increased 2mm naturally；After the completion of regulation, bolt 4.2 is tightened again, the second axle 5.3 is clamped.
If the stroke of the shank 2 of original state is highest, then like above, clockwise by adjusting screw 6
Rotate, limiting platform face 4.1 is encountered at the right straight line 5.2.4 ends of the orthodrome 5.2.1 sides on inclined disk 5.2, this first axle 5.1
Same level is in the second axle 5.3, that is to say, that the axis of first axle 5.1 and the axis of the second axle 5.3 are in same level
Face, the radius of gyration is reduced, and needle bar stroke have also been smaller.
Certainly between two extreme positions for rotating of eccentric ratio pin 5, also multiple travel positions, that is eccentric
Link pin 5 does not go to extreme position just to be stopped, and the present embodiment simply schematically illustrates minimum and maximum stroke.
Claims (6)
1. the adjustable sewing machine of a kind of needle bar stroke, including the shank (2), connecting rod (3) being arranged on head of sewing machine (1), bent
Handle (4), main shaft and motor, main shaft is arranged on sewing machine fuselage, and one end of main shaft is connected by bearing with crank (4), another
Synchronized band is held to be connected with motor, connecting rod (3) upper end is connected with crank (4), lower end is connected with shank (2)；Driven by motor
The rotation of main shaft, the rotation of main shaft drives crank (4) to rotate, and crank (4) drivening rod (3) is rotated, and shank (2) follows connecting rod
(3) realize pumping；It is characterized in that：Also include eccentric ratio pin (5), described connecting rod (3) upper end Jing is eccentric even
Lever pin (5) is connected with crank (4), and described eccentric ratio pin (5) is removable on crank (4)；Described eccentric ratio
Pin (5) is axially connected to form by first axle (5.1), inclined disk (5.2), the second axle (5.3), the axis and second of first axle (5.1)
Axle (5.3) axis is not conllinear, and any point is all higher than first to the horizontal range at inclined disk (5.2) center on inclined disk (5.2) circumference
The diameter of axle (5.1) and the second axle (5.3)；Connecting rod (3) upper end end is provided with an axially extending bore (3.1), and first axle (5.1) turns
Dynamic to coordinate in the axially extending bore (3.1) of connecting rod (3), the outer end of first axle (5.1) is axially bolted with adjusting screw (6), and pads
Having prevents the spacing shim (7) of connecting rod (3) top axial play, and adjusting screw (6) extends axially outward head (1) left cover at place
It is provided with the screw (1.1) for being easy to screwdriver insertion to twist adjusting screw (6)；Second axle (5.3) and the removable phase of crank (4)
Even, inclined disk (5.2) circumference is straight by end to end orthodrome (5.2.1), left straight line (5.2.2), small arc-shaped (5.2.3), the right side
Line (5.2.4) is constituted, and small arc-shaped (5.2.3) radius is less than orthodrome (5.2.1) radius, and eccentric ratio pin (5) is installed in crank
(4) after on, crank (4) has a limiting platform face (4.1), the left straight line (5.2.2) of inclined disk (5.2) below inclined disk (5.2)
Or right straight line (5.2.4) offsets with the limiting platform face (4.1) of crank (4)；Described first axle (5.1) is rotatably assorted in connecting rod
(3) refer to that first axle (5.1) is cased with needle bearing in axially extending bore (3.1), needle bearing coordinates the axle in connecting rod (3) upper end
Into through hole (3.1), connecting rod (3) upper end is provided with the oil-feed groove (3.2) being easy to needle bearing fuel feeding, during connecting rod (3) is in
Sky is arranged, and the lower end of connecting rod (3) is provided with an oil outlet (3.3), and oil outlet (3.3) is communicated with oil-feed groove (3.2)；Connecting rod
(3) side of lower end is hinged with shank and pricks head (8), and shank is pricked head (8) and is plugged on inside the lower end of connecting rod (3), and shank pricks head (8)
Connection oil outlet (3.3), shank is pricked head (8) and is clipped on shank (2), and the opposite side of connecting rod (3) lower end is hinged a slide block (9), sliding
Block (9) side is provided with a slide (10), and slide (10) is fixed in casing, and slide (10) is provided with a vertical chute
(10.1), slide block (9) is fitted snugly within the chute (10.1) of slide (10).
2. the adjustable sewing machine of needle bar stroke according to claim 1, it is characterised in that：Described shank (2) upper end and
Copper sheathing (11) is cased with outside lower end, copper sheathing (11) is separately mounted to head (1) top and bottom of casing.
3. the adjustable sewing machine of needle bar stroke according to claim 1, it is characterised in that：Described the second axle (5.3) with
Crank (4) removable connected referring to has a circular fixture block on crank (4), bolt (4.2) is provided with the opening of circular fixture block, the
Two axles (5.3) realize the clamping or release of circular fixture block in the circular port of circular fixture block by bolt (4.2).
4. the adjustable sewing machine of needle bar stroke according to claim 1, it is characterised in that：On described inclined disk (5.2)
Small arc-shaped (5.2.3) radian is 90 °.
5. the adjustable sewing machine of needle bar stroke according to claim 1, it is characterised in that：Described first axle (5.1) and
Second axle (5.3) diameter is identical.
6. the adjustable sewing machine of needle bar stroke according to claim 1, it is characterised in that：Described first axle (5.1)
1-2mm is differed between axis and the second axle (5.3) axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410384680.1A CN104131422B (en) | 2014-07-29 | 2014-07-29 | Sewing machine with adjustable needle bar stroke |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410384680.1A CN104131422B (en) | 2014-07-29 | 2014-07-29 | Sewing machine with adjustable needle bar stroke |
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| Publication Number | Publication Date |
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| CN104131422A CN104131422A (en) | 2014-11-05 |
| CN104131422B true CN104131422B (en) | 2017-05-03 |
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| CN201410384680.1A Active CN104131422B (en) | 2014-07-29 | 2014-07-29 | Sewing machine with adjustable needle bar stroke |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706643B (en) * | 2019-01-24 | 2021-08-31 | 李永坚 | Sewing machine needle bar part connecting assembly |
| CN110055690B (en) * | 2019-04-29 | 2024-05-28 | 吴江阳光科技缝纫机有限公司 | Lubricating device of wrist bending machine |
| CN110804808A (en) * | 2019-11-04 | 2020-02-18 | 辽宁银河新星轨道交通装备有限公司 | Sewing machine for locomotive air filter element |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11226283A (en) * | 1998-02-17 | 1999-08-24 | Yamato Sewing Mach Co Ltd | Needlebar stroke adjusting device of sewing machine |
| JP3646067B2 (en) * | 2001-01-26 | 2005-05-11 | ペガサスミシン製造株式会社 | Sewing machine needle bar stroke changing device |
| CN201495386U (en) * | 2009-08-10 | 2010-06-02 | 浙江宝石缝纫机股份有限公司 | Flat seaming machine needle bar stroke adjustable mechanism |
| JP2013208335A (en) * | 2012-03-30 | 2013-10-10 | Brother Ind Ltd | Sewing machine |
| CN204058912U (en) * | 2014-07-29 | 2014-12-31 | 杰克缝纫机股份有限公司 | The Sewing machines that needle bar stroke is adjustable |
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Address after: 318010 Taizhou Airport Road, Jiaojiang District, Zhejiang, No. 15 Applicant after: JACK SEWING MACHINE CO., LTD. Address before: 318010 Taizhou Airport Road, Jiaojiang District, Zhejiang, No. 15 Applicant before: New Jack Sewing Machine Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: NEW JACK SEWING MACHINE CO., LTD. TO: JACK SEWING CO., LTD. |
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Address after: 318014 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. |