CN103966773B - A kind of sewing-machine automatic needle-foot-lifting device - Google Patents
A kind of sewing-machine automatic needle-foot-lifting device Download PDFInfo
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- CN103966773B CN103966773B CN201410223707.9A CN201410223707A CN103966773B CN 103966773 B CN103966773 B CN 103966773B CN 201410223707 A CN201410223707 A CN 201410223707A CN 103966773 B CN103966773 B CN 103966773B
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Abstract
The invention provides a kind of sewing-machine automatic needle-foot-lifting device, comprise drive source, transmission levers, hoisting frame, depression bar, presser bar spring bracket and presser feet; Drive source and Sewing machines housing are fixed, and drive source comprises telescopic shaft; Transmission levers comprises fulcrum, the long arm of force and the short arm of force, fulcrum and described housing hinge, and the telescopic shaft of the long arm of force and drive source is hinged with the two ends of a connecting rod respectively; Hoisting frame comprises underframe and side frame, side frame upper end and the short arm of force hinged; Presser bar spring bracket, presser feet are all fixed with the depression bar body of rod, depression bar body below presser bar spring bracket coordinates with the first fairlead being fixed on described housing, depression bar upper end coordinates with the second fairlead being fixed on described housing, fits in presser bar spring bracket lower surface and hoisting frame underframe upper end.The present invention makes drive source can realize the automatic needle-foot-lifting action of Sewing machines under the effect of less driving force, thus drive source volume is little, low cost of manufacture, be conducive to Sewing machines attractive in appearance, packaging and transport.
Description
Technical field
The present invention relates to technical field of sewing equipment, particularly relate to a kind of sewing-machine automatic needle-foot-lifting device.
Background technology
Along with the develop rapidly of science and technology, the mechanization degree that clothes manufacture is more and more higher, and in clothes making technology for making field, the sewing device based on industrial sewing machine is very many, such as flat seam machine, overlock machine, flat seaming machine etc.
At present, industrial sewing machine is when charging, and the automated manner that the operation of lifting and depressing of presser feet is generally adopted manual mode or undertaken by automatically controlled signal, namely the presser foot lifting device of industrial sewing machine is hand gear or automatics.
When the presser foot lifting device employing hand gear of industrial sewing machine, then when charging, often need lever assembly knee being close to Sewing machines, raise up to make presser foot lifter, just there is a problem in this: each charging all needs lever assembly knee being close to Sewing machines, thus the labour intensity of operating personnel is large, easily tired.The automatic needle-foot-lifting device of prior art directly makes presser feet lift often through solenoid actuated pull bar, then sewing is put between presser feet and pressing plate, putting down presser feet again makes presser feet push down sewing, make again afterwards, because presser feet lift by solenoid actuated pull bar Direct driver, thus the driving force of electromagnet is very large, volume is also very large, thus the deployment cost of electromagnet is very high, makes the manufacturing cost of automatic needle-foot-lifting device very high.The volume of electromagnet also causes very greatly the volume of industrial sewing machine large in addition, and this not only makes the production cost of industrial sewing machine high, also affects the attractive in appearance of industrial sewing machine, is also unfavorable for the packaging of industrial sewing machine, transport.
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 that a kind of volume is little, the sewing-machine automatic needle-foot-lifting device of low cost of manufacture, 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 sewing-machine automatic needle-foot-lifting device, comprising drive source, transmission levers, hoisting frame, depression bar, presser bar spring bracket and presser feet;
The housing of described drive source and described Sewing machines is fixed, and described drive source comprises telescopic shaft;
Described transmission levers comprises fulcrum, the long arm of force and the short arm of force, the housing hinge of described fulcrum and described Sewing machines, the end of the described long arm of force and one end of a connecting rod hinged, the other end of described connecting rod and the outer end of described telescopic shaft hinged;
Described hoisting frame comprises underframe and side frame, and the lower end of described side frame is connected with one end of described underframe, the upper end of described side frame and the end of the described short arm of force hinged;
The body of rod of described presser bar spring bracket and described depression bar is fixed, and described presser feet is fixed on the lower end of described depression bar, and the depression bar shank portion below described presser bar spring bracket coordinates with the first fairlead, and described first fairlead is fixed on the housing of described Sewing machines; The upper end of described depression bar coordinates with the second fairlead, and described second fairlead is also fixed on the housing of described Sewing machines; Fit in the upper end of the lower surface of described presser bar spring bracket and the underframe of described hoisting frame.
Preferably, also comprise infrared receiver and RF transmitter, described RF transmitter is installed on the head of described Sewing machines, and described infrared receiver is installed on the workbench of described Sewing machines, and described infrared receiver is positioned at the range of exposures of described RF transmitter; Described infrared receiver connects the controller of described Sewing machines, and described controller also connects described drive source.
Preferably, described drive source comprises electromagnet and is located at the iron core of described electromagnet endoporus, the telescopic shaft of described iron core and described drive source; Depression bar shank portion between described second fairlead and described presser bar spring bracket is provided with back-moving spring.
Preferably, the angle of the described long arm of force and the short arm of force is 80 °-110 °.
Preferably, described transmission levers comprises the first installing hole, the second installing hole and the 3rd installing hole; It is hinged that described first installing hole realizes with the housing of described Sewing machines by the bearing pin being fixed on the housing of described Sewing machines, the fulcrum of described bearing pin and described transmission levers; The brachium of the centre-to-centre spacing between described first installing hole and described second installing hole and the described long arm of force, one end of described second installing hole and described connecting rod realizes hinged by bearing pin; Centre-to-centre spacing between described first installing hole and described 3rd installing hole and the brachium of the described short arm of force, the upper end of described 3rd installing hole and described side frame realizes hinged by bearing pin.
Preferably, described transmission levers adopts the board making of thinner thickness to form, the curved waist hole that to be provided with the first installing hole between the second installing hole of described transmission levers and the 3rd installing hole be the center of circle; Described curved waist hole and a locating dowel are slidably connected, and described locating dowel is fixed on the housing of described Sewing machines.
Preferably, the underframe upper end of described hoisting frame is provided with a groove, and the lower end of described presser bar spring bracket is located in described groove, and described groove is matched in clearance with the lower end of described presser bar spring bracket in the direction of the width.
As mentioned above, a kind of sewing-machine automatic needle-foot-lifting device of the present invention, has following beneficial effect:
1, the long arm of force of transmission levers and the setting of the short arm of force, make drive source can realize the automatic needle-foot-lifting action of Sewing machines under the effect of less driving force, thus it is low to the requirement of drive source driving force, make the also corresponding reduction of the volume of drive source, thus low cost of manufacture of the present invention, make the production cost of industrial sewing machine low, also help industrial sewing machine attractive in appearance, packaging and transport.
2, the configuration of infrared receiver and RF transmitter, make automatic needle-foot-lifting action of the present invention more accurate, timely, automaticity is higher.
3, transmission levers adopts the board making of thinner thickness to form, and structure is simple, be convenient to manufacture, and manufacturing cost of the present invention is reduced further.
Accompanying drawing explanation
Fig. 1 is shown as the schematic front view of sewing-machine automatic needle-foot-lifting device of the present invention.
Schematic diagram is looked on the right side that Fig. 2 is shown as sewing-machine automatic needle-foot-lifting device of the present invention.
Fig. 3 is shown as the structural representation of the transmission levers of sewing-machine automatic needle-foot-lifting device of the present invention.
Fig. 4 is shown as the transmission levers of sewing-machine automatic needle-foot-lifting device of the present invention and the assembly relation schematic diagram of locating dowel.
Fig. 5 is shown as sewing-machine automatic needle-foot-lifting device of the present invention and is installed on assembling schematic diagram in Sewing machines housing.
Element numbers explanation
The housing 1a head of 1 Sewing machines
1b head cantilever 2 workbench
100 drive source 110 telescopic shafts
200 transmission levers 201 first installing holes
202 second installing hole 203 the 3rd installing holes
204 curved waist hole 210 bearing pins
220 bearing pin 230 bearing pins
The shaft part that 240 locating dowel 241 diameters are larger
The shaft part 242a draw-in groove that 242 diameters are less
243 back-up ring 300 hoisting frames
310 underframe 320 side frames
400 depression bar 500 presser bar spring brackets
600 presser feet 700 connecting rods
810 first fairlead 820 second fairleads
830 back-moving spring L
1the brachium of the long arm of force
L
2the long arm of force of brachium β of the short arm of force and the angle of the short arm of force
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. 5.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.
In view of presser foot lifting device or the employing hand gear of the industrial sewing machine of prior art, or adopt automatics; When adopting hand gear, often need lever assembly knee being close to Sewing machines, to make presser foot lifter raise up, thus the labour intensity of operating personnel is large, easily tired; When adopting automatics, presser feet is directly made to lift often through solenoid actuated pull bar, thus the driving force of electromagnet is very large, volume is also very large, not only cause that the deployment cost of electromagnet is high, the production cost of industrial sewing machine is high, also affect the attractive in appearance of industrial sewing machine, be also unfavorable for the packaging of industrial sewing machine, transport.The present inventor designs a kind of sewing-machine automatic needle-foot-lifting device, by arranging transmission levers, driving force is made to act on the long arm of force of transmission levers, the short arm of force lifted by transmission levers of presser feet is realized, thus greatly reduce driving force, also make drive source volume little, not only greatly reduce the deployment cost of sewing-machine automatic needle-foot-lifting device, the production cost of industrial sewing machine, also help attractive in appearance, packaging and the transport of industrial sewing machine.
Below, will be described in detail to sewing-machine automatic needle-foot-lifting device of the present invention by specific embodiment.
As shown in Figure 1, Figure 2, Figure 5, a kind of sewing-machine automatic needle-foot-lifting device, comprises drive source 100, transmission levers 200, hoisting frame 300, depression bar 400, presser bar spring bracket 500 and presser feet 600.
Described drive source 100 is fixed with the housing 1 of described Sewing machines, and described drive source 100 comprises telescopic shaft 110.In order to ensure that sewing-machine automatic needle-foot-lifting device reaction of the present invention is sensitive, presser foot lifter action is quick, accurate, reliable and stable, preferably, described drive source 100 comprises electromagnet and is located at the iron core of described electromagnet endoporus, the telescopic shaft 110 of described iron core and described drive source.Certainly, described drive source 100 also can adopt hydraulic cylinder or cylinder, serves as telescopic shaft 110 by the piston rod of hydraulic cylinder or cylinder, in a word, as long as described drive source 100 can realize the expanding-contracting action of telescopic shaft 110.And described drive source 100 is fixed on the housing 1 of described Sewing machines by securing member by the pilot hole of its afterbody.
Described transmission levers 200 comprises fulcrum 210, the long arm of force and the short arm of force, described fulcrum 210 is hinged with the housing 1 of described Sewing machines, the end of the described long arm of force and one end of a connecting rod 700 hinged, the other end of described connecting rod 700 and the outer end of described telescopic shaft 110 hinged.Described hoisting frame 300 comprises underframe 310 and side frame 320, and the lower end of described side frame 320 is connected with one end of described underframe 310, the upper end of described side frame 320 and the end of the described short arm of force hinged.
As shown in Figure 3, described transmission levers 200 comprises the first installing hole 201, second installing hole 202 and the 3rd installing hole 203; It is hinged that described first installing hole 201 realizes with the housing 1 of described Sewing machines by the bearing pin 210 (i.e. described fulcrum 210) being fixed on the housing of described Sewing machines; Centre-to-centre spacing between described first installing hole 201 and described second installing hole 202 and the brachium L of the described long arm of force
1, described second installing hole 202 realizes hinged with one end of described connecting rod 700 by bearing pin 220; Centre-to-centre spacing between described first installing hole 201 and described 3rd installing hole 203 and the brachium L of the described short arm of force
2, described 3rd installing hole 203 realizes hinged with the upper end of described side frame 320 by bearing pin 230.
Consider from production cost, preferably, described transmission levers 200 adopts the board making of thinner thickness to form, in order to ensure the stable transmission adopting the transmission levers 200 be made compared with light sheet, do not swing to rocking outside two plate faces, preferably, the curved waist hole 204 that to be provided with the first installing hole 201 between described second installing hole 202 of described transmission levers 200 and the 3rd installing hole 203 be the center of circle; As shown in Figure 1, described curved waist hole 204 and a locating dowel 240 are slidably connected, and described locating dowel 240 is fixed on the housing 1 of described Sewing machines.As shown in Figure 4, described locating dowel 240 comprises one section of secondary multidiameter, the shaft part 241 that the diameter of described secondary multidiameter is larger is fixed with the housing 1 of described Sewing machines, the step surface of described secondary multidiameter coordinates with a plate face of described transmission levers 200, the shaft part 242 that the diameter of described secondary multidiameter is less passes described curved waist hole 204, the shaft part 242 that the diameter of described secondary multidiameter is less is provided with a draw-in groove 242a, a back-up ring 243 is provided with in described draw-in groove 242a, described back-up ring 243 coordinates with another plate face of described transmission levers 200, thus realize the location of described transmission levers 200, described transmission levers 200 is avoided to swing to rocking outside two plate faces.Due to the restriction of industrial sewing machine self installing space, and from the optimized design of driving force, preferably, the angle β of the described long arm of force and the short arm of force is 80 °-110 °.
As shown in Figure 1 and Figure 2, described presser bar spring bracket 500 is fixed with the body of rod of described depression bar 400, described presser feet 600 is fixed on the lower end of described depression bar 400, depression bar shank portion below described presser bar spring bracket 500 coordinates with the first fairlead 810, and described first fairlead 810 is fixed on the housing of described Sewing machines; The upper end of described depression bar 400 coordinates with the second fairlead 820, and described second fairlead 820 is also fixed on the housing of described Sewing machines; Fit in the upper end of the lower surface of described presser bar spring bracket 500 and the underframe 310 of described hoisting frame.Wherein said first fairlead 810, second fairlead 820 all can be fixed on the housing 1 of described Sewing machines by clip.Because described presser bar spring bracket 500 does rectilinear motion with described depression bar 400 under the guiding of the first fairlead 810, second fairlead 820, described hoisting frame 300 then moves in a circle around described fulcrum 210 under the effect of the short arm of force of described transmission levers 200, in order to make described hoisting frame 300 can successfully presser bar spring bracket 500 described in lifting, avoid interfering phenomenon in lifting process, preferably, the upper end of the underframe 310 of described hoisting frame is provided with a groove (not shown), and the lower surface of described presser bar spring bracket 500 is relative with described groove.The width of described groove is greater than the width of the lower end of described presser bar spring bracket 500, makes the lower end of described groove and described presser bar spring bracket 500 be matched in clearance, thus the lower end of described presser bar spring bracket 500 relative, on width movement can occur in described groove.When described drive source 100 adopts electromagnet structure, depression bar shank portion between described second fairlead 820 and described presser bar spring bracket 500 is provided with back-moving spring 830, described back-moving spring 830 is stage clip, under the effect of described back-moving spring 830, the lower surface of described presser bar spring bracket 500 keeps fitting with the groove bottom of described groove all the time.
In order to make sewing-machine automatic needle-foot-lifting plant automation degree of the present invention higher, and presser foot lifter action is more quick, accurate, reliable and stable, as shown in Figure 5, preferably, sewing-machine automatic needle-foot-lifting device of the present invention also comprises infrared receiver (not shown) and RF transmitter (not shown), described RF transmitter is installed on the head 1a of described Sewing machines, described infrared receiver is installed on the workbench 2 of described Sewing machines, and described infrared receiver is positioned at the range of exposures of described RF transmitter; Described infrared receiver connects the controller of described Sewing machines, and described controller also connects described drive source 100.
The operation principle of sewing-machine automatic needle-foot-lifting device of the present invention is: when industrial sewing machine is in holding state, described infrared receiver receives the signal that described RF transmitter is launched, when sewing covers described infrared receiver, described infrared receiver cannot receive the signal that described RF transmitter is launched again, this change is transferred to the controller of described Sewing machines by described infrared receiver, described controller transmission of signal gives described drive source 100, arranged by relative program in controller, make described drive source 100 within the scheduled time (such as 1 second), described telescopic shaft 110 is retracted, described telescopic shaft 110 drives described connecting rod 700, described connecting rod 700 drives described transmission levers 200 to rotate around fulcrum 201 again, the short arm of force of described transmission levers 200 drives described hoisting frame 300 to move up again, the underframe 310 of described hoisting frame 300 drives described presser bar spring bracket 500 to move up, described presser bar spring bracket 500 is made to drive again described depression bar 400 along described first fairlead 810, second fairlead 820 moves up, realize the action of presser foot lifter 600, within the time of presser foot lifter 600, operating personnel complete sewing from the action infrared receiver moves to presser feet, described drive source 100 is after the scheduled time, described telescopic shaft 110 stretches out, presser feet 600 falls, presser foot lifter release, presser feet 600 compresses the sewing below it.When described drive source 100 of the present invention adopts electromagnet structure, controller controls described electromagnet and is energized in the given time, described iron core 110 is retracted under the effect of electromagnet, after the scheduled time terminates, described electromagnet dead electricity, described iron core 110, under the promotion of back-moving spring 830, stretches out fast, realizes homing action.
As shown in Fig. 3, Fig. 5, sewing-machine automatic needle-foot-lifting device of the present invention, because the brachium L of the long arm of force of described transmission levers 200
1than the brachium L of the short arm of force
2long, so in automatic needle-foot-lifting process, the driving force of described drive source 100 can be less than the lifting force of hoisting frame 300, thus compared with the automatic needle-foot-lifting device of prior art, the present invention reduces the driving force needed for presser foot lifter greatly, thus make drive source smaller volume, make described drive source 100 can be arranged on housing 1 inside of Sewing machines, and be positioned at the head cantilever 1b near described depression bar 400.
In sum, sewing-machine automatic needle-foot-lifting device of the present invention, low to the requirement of drive source driving force, make the also corresponding reduction of the volume of drive source, thus low cost of manufacture of the present invention, make the production cost of industrial sewing machine low, and the inside of Sewing machines housing can be located at, thus be conducive to industrial sewing machine attractive in appearance, packaging and transport.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 (7)
1. a sewing-machine automatic needle-foot-lifting device, it is characterized in that, comprise drive source (100), transmission levers (200), hoisting frame (300), depression bar (400), presser bar spring bracket (500) and presser feet (600);
Described drive source (100) is fixed with the housing (1) of described Sewing machines, and described drive source (100) comprises telescopic shaft (110);
Described transmission levers (200) comprises fulcrum (210), the long arm of force and the short arm of force, described fulcrum (210) is hinged with the housing (1) of described Sewing machines, the end of the described long arm of force and one end of a connecting rod (700) hinged, the other end of described connecting rod (700) and the outer end of described telescopic shaft (110) hinged;
Described hoisting frame (300) comprises underframe (310) and side frame (320), the lower end of described side frame (320) is connected with one end of described underframe (310), the upper end of described side frame (320) and the end (202) of the described short arm of force hinged;
Described presser bar spring bracket (500) is fixed with the body of rod of described depression bar (400), described presser feet (600) is fixed on the lower end of described depression bar (400), the depression bar shank portion of described presser bar spring bracket (500) below coordinates with the first fairlead (810), and described first fairlead (810) is fixed on the housing (1) of described Sewing machines; The upper end of described depression bar (400) coordinates with the second fairlead (820), and described second fairlead (820) is also fixed on the housing (1) of described Sewing machines; Fit in the upper end of the lower surface of described presser bar spring bracket (500) and the underframe (310) of described hoisting frame.
2. sewing-machine automatic needle-foot-lifting device according to claim 1, it is characterized in that: also comprise infrared receiver and RF transmitter, described RF transmitter is installed on the head (1a) of described Sewing machines, described infrared receiver is installed on the workbench (2) of described Sewing machines, and described infrared receiver is positioned at the range of exposures of described RF transmitter; Described infrared receiver connects the controller of described Sewing machines, and described controller also connects described drive source (100).
3. sewing-machine automatic needle-foot-lifting device according to claim 1 and 2, it is characterized in that: described drive source (100) comprises electromagnet and is located at the iron core of described electromagnet endoporus, the telescopic shaft (110) of described iron core and described drive source; Depression bar shank portion between described second fairlead (820) and described presser bar spring bracket (500) is provided with back-moving spring (830).
4. sewing-machine automatic needle-foot-lifting device according to claim 1 and 2, is characterized in that: the angle (β) of the described long arm of force and the short arm of force is 80 °-110 °.
5. sewing-machine automatic needle-foot-lifting device according to claim 4, is characterized in that: described transmission levers (200) comprises the first installing hole (201), the second installing hole (202) and the 3rd installing hole (203); It is hinged that described first installing hole (201) realizes with the housing (1) of described Sewing machines by the bearing pin (210) being fixed on the housing of described Sewing machines, described bearing pin (210) the i.e. fulcrum (210) of described transmission levers; Centre-to-centre spacing between described first installing hole (201) and described second installing hole (202) and the brachium (L of the described long arm of force
1), described second installing hole (202) realizes hinged with one end of described connecting rod (700) by bearing pin (220); Centre-to-centre spacing between described first installing hole (201) and described 3rd installing hole (203) and the brachium (L of the described short arm of force
2), described 3rd installing hole (203) realizes hinged with the upper end of described side frame (320) by bearing pin (230).
6. sewing-machine automatic needle-foot-lifting device according to claim 5, it is characterized in that: described transmission levers (200) adopts the board making of thinner thickness to form, the curved waist hole (204) that to be provided with the first installing hole (201) between second installing hole (202) of described transmission levers (200) and the 3rd installing hole (203) be the center of circle; Described curved waist hole (204) and a locating dowel (240) are slidably connected, and described locating dowel (240) is fixed on the housing (1) of described Sewing machines.
7. sewing-machine automatic needle-foot-lifting device according to claim 1 and 2, it is characterized in that: underframe (310) upper end of described hoisting frame is provided with a groove, the lower end of described presser bar spring bracket (500) is located in described groove, and described groove is matched in clearance with the lower end of described presser bar spring bracket (500) in the direction of the width.
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| CN201410223707.9A CN103966773B (en) | 2014-05-23 | 2014-05-23 | A kind of sewing-machine automatic needle-foot-lifting device |
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| CN103966773B true CN103966773B (en) | 2015-11-04 |
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| CN105350187B (en) * | 2015-09-29 | 2018-08-07 | 浙江美机缝纫机有限公司 | Has the mechanism for lifting pressre of sewing machine of locking device |
| CN105887351B (en) * | 2016-06-24 | 2018-11-27 | 天津市中马骏腾精密机械制造有限公司 | A kind of single pedal overedger |
| CN107217396B (en) * | 2017-05-18 | 2020-04-14 | 杰克缝纫机股份有限公司 | Hemming machine pressure bar mechanism and hemming machine |
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| CN103215758A (en) * | 2013-04-02 | 2013-07-24 | 新杰克缝纫机股份有限公司 | Built-in type automatic pressure foot lifting mechanism of sewing machine |
| CN103437079A (en) * | 2013-08-23 | 2013-12-11 | 新杰克缝纫机股份有限公司 | Automatic lifting mechanism for presser foot of sewing machine |
| CN203855785U (en) * | 2014-05-23 | 2014-10-01 | 新杰克缝纫机股份有限公司 | Automatic presser foot uplifting device of sewing machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3652794B2 (en) * | 1996-06-14 | 2005-05-25 | 株式会社バルダン | Presser foot device in sewing machine |
| JP2009112325A (en) * | 2007-11-01 | 2009-05-28 | Brother Ind Ltd | Presser foot device for sewing machine and sewing machine |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215758A (en) * | 2013-04-02 | 2013-07-24 | 新杰克缝纫机股份有限公司 | Built-in type automatic pressure foot lifting mechanism of sewing machine |
| CN103437079A (en) * | 2013-08-23 | 2013-12-11 | 新杰克缝纫机股份有限公司 | Automatic lifting mechanism for presser foot of sewing machine |
| CN203855785U (en) * | 2014-05-23 | 2014-10-01 | 新杰克缝纫机股份有限公司 | Automatic presser foot uplifting device of sewing machine |
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