CN102918193B - Single-head or multi-head embroidery machine - Google Patents

Single-head or multi-head embroidery machine Download PDF

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Publication number
CN102918193B
CN102918193B CN201180015321.3A CN201180015321A CN102918193B CN 102918193 B CN102918193 B CN 102918193B CN 201180015321 A CN201180015321 A CN 201180015321A CN 102918193 B CN102918193 B CN 102918193B
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China
Prior art keywords
yarn
double
head
pin
embroidery
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CN201180015321.3A
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CN102918193A (en
Inventor
G·施密特
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ZOJE EUROP GmbH
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ZOJE EUROP GmbH
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Priority to DE102010013016.8 priority Critical
Priority to DE102010013016A priority patent/DE102010013016A1/en
Application filed by ZOJE EUROP GmbH filed Critical ZOJE EUROP GmbH
Priority to PCT/EP2011/001369 priority patent/WO2011116912A2/en
Publication of CN102918193A publication Critical patent/CN102918193A/en
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Publication of CN102918193B publication Critical patent/CN102918193B/en
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Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B19/00Programme-controlled sewing machines
    • D05B19/02Sewing machines having electronic memory or microprocessor control unit
    • D05B19/12Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B69/00Driving-gear; Control devices
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05CEMBROIDERING; TUFTING
    • D05C11/00Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/08Thread-tensioning arrangements

Abstract

The invention relates to a single-head or multi-head embroidery machine including stitch-forming tools which are each formed by a thread-guiding needle interacting with a two-thread lockstitch looper for forming stitches, and also including a feeding device for achieving relative movements between the material to be embroidered and the stitch-forming tools, which take place as a function of the movements of the needle. In order to avoid a temporal overlap of the stitch-forming phase with the feeding movement of the material to be embroidered the two-thread lockstitch looper rotates at a speed which corresponds to n times the speed of the main shaft of the machine, where n is a whole number which is greater than the number 2.

Description

Single head or multi-head embroidery machine
Technical field
The present invention relates to a kind of single head or multi-head embroidery machine, it comprises circle forming and propulsion plant, described circle forming respectively by one with double-locked stitch-yarn gripper acting in conjunction with form coil, guide the pin of yarn to be formed, described propulsion plant is for obtaining the relative motion between embroidery article and circle forming.
Background technology
At the rotation yarn gripper that this double-locked stitch-yarn gripper in most cases used is enforcement two complete rotations for each lopping stage, apply thousands of time as it in Sewing machines as standard yarn gripper and also demonstrate at this extremely successful.This double-locked stitch-yarn gripper is in order to lopping, particularly in order to the yarn stress needing prescribed level drawn in by coil.
Such as by the known such application of double-locked stitch-yarn gripper in Sewing machines of DE4217848C1, this double-locked stitch-yarn gripper each lopping cycle implements two complete rotations and the therefore double rotation of each knitting cycle.
Sewing machines disclosed herein has a substrate, a column and an arm knownly, and this arm terminates at a head.In this arm, support an arm axle, this arm axle with move up and down in head, to be in the shank of the pin guiding yarn and to be in transmission connection.
Support a yarn lever moved up and down with the coefficient enforcement of pin in this external head in known manner, it is driven by arm axle equally.Arm axle is in via the yarn gripper driving shaft supported in belt drive unit or the transmission mechanism via machinery and the substrate at Sewing machines and is in transmission connection and drives this yarn gripper driving shaft with the gearratio of 1:2, thus yarn gripper each lopping cycle enforcement two circle rotates, wherein first lap rotates and is used for catching and widen pin yarn ring, and the second circle rotation is unloaded rotation, it does not have impact for knitting cycle.
Due to the linear slit of sewing and the different objects of linear slit of embroidery, the requirement for Sewing machines or embroidery machine exists significant different.Sewing linear slit forms connection or fixing linear slit substantially, and utilize them that most two or more parts are fixed to one another connection, embroidery linear slit is formed in the decoration (decoration linear slit) that penelope adds, and it is transmitting force not.
The intensity of fixing linear slit reaches thus at this, and the yarn ring namely put down by yarn gripper is by lever jack with the upside tractive of relatively large power towards sewing article, and therefore the node of pin yarn and yarn gripper yarn clings in material layer to be sewed at middle part.Correspondingly also to measure the yarn power of yarn gripper yarn.
Situation when forming embroidery linear slit is completely different.Because at this pin yarn (=embroidery cotton/needle thread/needlework) in order to obtain decorative effect, only abut in neatly on the upside of embroidery article, so yarn stress is kept little as far as possible in embroidering process, make embroidery cotton enough fixing in position on penelope, but can not produce loosening thread segment, and the node between pin yarn and yarn gripper yarn always abuts on the downside of penelope.
For this reason, for embroidery machine, significantly less pin yarn stress is pursued compared with Sewing machines.
Because the kinematics characteristic of double-locked stitch-yarn gripper is not adaptive in an appropriate manner when being implemented two double-locked stitch-yarn grippers rotated each lopping stage and transferring in embroidery machine, even if so in nearest embroidery machine, ahead running for penelope started at a time point already, terminated not yet completely at this time point knitting cycle.This is very disadvantageous, because penelope moved a considerable amount relative to its position when being needled into penelope already being started to carry out time point that yarn draws in by lever jack thus.The arm of the yarn ring guided towards thread storage device by pinprick thus not only from pinprick out time, and directly experience additional turning at it respectively through after penelope.These two turn to the resistance causing adding when being drawn in yarn by lever jack, and this resistance forces the unexpected raising causing the minimum of a value of yarn stress.
This situation has disadvantageous especially effect generally in embroidery machine, and embroidery machine is usually not only with larger loop length work compared with Sewing machines, and with the propulsion plant work extended in different directions.
Summary of the invention
Task of the present invention is, provides a kind of scheme, and it makes to be remained on by minimum yarn stress in the embroidery machine with double-locked stitch-yarn gripper in the significantly lower scope of expectation.
The present invention is from such understanding, namely in double-locked stitch-yarn gripper embroidery machine, knitting cycle (coil becomes seam process) is so overlapping at least partly on the one hand in addition with the ahead running of sewing article on the one hand, make at the end of knitting cycle is still incomplete, namely, when pin yarn is not still drawn in completely by lever jack, the ahead running of sewing article just starts.
To achieve these goals, in order to avoid the ahead running of knitting cycle and penelope is overlapping in time, suggestion double-locked stitch-yarn gripper utilizes a rotating speed to rotate, and this rotating speed equals the n of the rotating speed of the main shaft of embroidery machine doubly, and wherein " n " is the integer being greater than numerical value 2.
Such as rotated with n=3 by double-locked stitch-yarn gripper, with regard to the anglec of rotation of being passed by by machine shaft, the larger angular speed of knitting cycle and the double-locked stitch-yarn gripper 2 formed thus is accordingly than terminating earlier when the double-locked stitch-yarn gripper rotated with " n=2 ".Time window (ahead running of knitting cycle and penelope is activate simultaneously in this time window) is therefore minimized.
Because the double-locked stitch-yarn gripper of each lopping stage double rotation produces definitely satisfactory result in the field of so-called quick Sewing machines with much higher rotating speed, so be clear that, both can not adversely affect the quality of produced linear slit according to the rotating speed of raising double-locked stitch-yarn gripper of the present invention, also can not adversely affect mechanical durability.
In above-mentioned scheme, double-locked stitch-yarn gripper rotates with constant n times of machine shaft rotating speed, and another one solution of the present invention is: double-locked stitch-yarn gripper can the angular speed of periodically-varied rotate relative to machine shaft, wherein the angular speed of double-locked stitch-yarn gripper during its work rotates, there is larger value and its unloaded rotate during there is relatively little value.
Accompanying drawing explanation
Next the present invention elaborates by means of an embodiment and corresponding accompanying drawing.
The partial sectional view of the front area of the common embroidery head of Fig. 1, it has double-locked stitch-yarn gripper;
Fig. 2, according to the displacement/time diagram of the circle forming of prior art and the motion of propulsion plant, has the temporarily overlapping time window for knitting cycle and ahead running;
Fig. 3 according to the displacement/time diagram of the motion of propulsion plant of the present invention and circle forming,
Fig. 4 is according to prior art, corresponding with the time window 31 in Fig. 2, yarn ring on the rotary support (stop member) of the bobbin case support of double-locked stitch-yarn gripper by time situation;
Fig. 5 as Fig. 4, but illustrates the situation in the other direction of the ahead running for embroidery frame;
Fig. 6 is according to prior art, corresponding with the time window 31 in Fig. 3, yarn ring on the rotary support (stop member) of the bobbin case support of double-locked stitch-yarn gripper by time situation.
Detailed description of the invention
The sectional view of the forepiece 1 of common embroidery head shown in Figure 1, it has double-locked stitch-yarn gripper 2, platen 3 and needle plate 4.Platen 3 reclines on both axes can free-moving embroidery frame 5, and penelope is tightened in this embroidery frame.Double-locked stitch-yarn gripper 2 is common frame mode and has bobbin case support 6 for holding bobbin case 7.In bobbin case 7, rotatably the shuttle of yarn gripper yarn storage is held in supporting.
Coefficient and can be received with the shank 9 of pin 8 vertical motion and be driven device 11 in known manner in basic framework 10 and drive with double-locked stitch-yarn gripper 2, the actuation movement of needle actuating device is passed to shank 9 by it.The forepiece 1 of embroidery head arranges a hold down gag 12 for each embroidery cotton in addition, and it arranges movably and is driven by a driving device 13 on shank 9.The forepiece 1 of this external embroidery head arranges a driven lever jack 14 in known manner for each embroidery cotton, and it can be bearing on axle 15 with deflecting, and this axle self is accommodated on basic framework 10.Finally embroidery head has adjustable yarn brake 16 in known manner, and its position is fixedly mounted on forepiece 1.
The back part be not shown specifically of embroidery head is fixedly connected with machine frame and with the drive unit for shank 9, hold down gag 12 and lever jack 14.The back part of embroidery head is connected with forepiece 1 via a linear guidance device be not shown specifically in addition, thus forepiece can in a vertical plane with the alignment direction of the shank 9 existed on move above double-locked stitch-yarn gripper 2, wherein have a shank 9, hold down gag 12 to be respectively connected with corresponding drive unit with a pin lever 14.
Except the driving of double-locked stitch-yarn gripper 2, the driving of above-mentioned parts is realized by a unshowned machine shaft, and this machine shaft each lopping stage implements a complete i.e. rotary motion of 360 °.In the prior art double-locked stitch-yarn gripper 2 with double rotating speed rotate, i.e. n=2, rotates with n times of rotating speed according to double-locked stitch-yarn gripper 2 of the present invention, its be greater than 2 integer.For this reason in the embodiments of the invention illustrated, the transmission mechanism that has gearratio n=3 is set between machine shaft and double-locked stitch-yarn gripper 2.
In order to understand the present invention, first with reference to accompanying drawing 2, it illustrates pin 8 and revolves motion diagram when turning around according to the synergistic typical motion diagram of known dynamics between the double-locked stitch-yarn gripper 2 of the double rotation of prior art and unshowned propulsion plant and hold down gag 12 at machine shaft.
Curve 17 illustrates the motion of the tip of pin 8 relative to the surface of needle plate.Needle point to lift to the lower face of needle plate 4 on the surface that time point 19 crosses needle plate again through pin hole at time point 18.
Curve 20 illustrates stroke motion and the spacing of bottom side above needle plate 4 of hold down gag 12.
Curve 21 illustrates that embroidery frame motion is relative in the last continuity that be needled into a little of time point 18 on penelope.
Embroidery frame motion start from time point 22 and time point 19(its correspond to pin 8 by needle plate 4 time point out) after soon.The end of embroidery frame motion overlaps with curve sink of graph.All values of this movement function change as constant coefficient linear scale along with variable loop length (=last spacing of thrusting a little between 18 to later being needled into a little).
Curve 23 represents the yarn demand that pin 8 time point 24 starts, and extend into downwards under penelope surface at its shackle of this time point.At time point 25, the tip of double-locked stitch-yarn gripper 2 enters into the pin yarn ring be made up of pin 8, and double-locked stitch-yarn gripper 2 takes over the control to pin yarn thus.Its yarn demand is illustrated by curve 26.First the tip of double-locked stitch-yarn gripper 2 is widened and is presented to its yarn ring by pin 8 and guided by the bobbin case 7 that yarn collar is arranged around the inside of double-locked stitch-yarn gripper 2.Then the yarn demand of double-locked stitch-yarn gripper 2 reduces again, until double-locked stitch-yarn gripper discharges pin yarn again completely at time point 27.With pin yarn contacts in the time of double-locked stitch-yarn gripper 2 only between time point 25 and 27.This is maximum correspond to 360 ° of the lopping stage in 180 °, double-locked stitch-yarn gripper 2 no load movement in remaining time, namely double-locked stitch-yarn gripper 2 only the ensuing lopping stage just again with pin yarn contacts.
The yarn demand of pin 8 and double-locked stitch-yarn gripper 2 is contrary with the yarn feeding of curve 28.This yarn feeding is the function of lever jack 14 around the inflection point of its axis 15.According to the yarn feeding of curve 28 relative to yarn demand (23,26) have one excessive, it is used as storage level, takes out the yarn consumption relevant to loop length by this storage level from embroidery before circulates.
Yarn feeding 28 reduces with the amount of this yarn consumption, thus effective yarn feeding is identical with curve 29.Described yarn consumption is only extracted out by lever jack 14 and is again compensated at the highest inflection point of lever jack 14 at this system length of yarn (the whole length between Yarn Brake 14 to needle plate 4 of=pin yarn) in the time range between time point 30 and lever jack OT from pin yarn stores.
With the length that a difference of the curve map of Sewing machines is the time window moved for embroidery frame.In Sewing machines, this is approximately 120 °.In yarn gripper embroidery machine but be 180 degree or larger.Embroidery frame motion starts at time point 22 and therefore correspondingly in the prior art to move forward in time.Although this is the concession of necessity of embroidery frame drive unit to the numerical control irrelevant with machinery of embroidering, but this causes the technical shortcoming of embroidery of can not ignore in the size of required yarn stress.
The sart point in time of the ahead running of embroidery frame is advanced to obviously be positioned at the yarn undertaken by lever jack 14 draw in (to complete the embroidery started) end time point before, this causes penelope to move relative to needle plate 4 before end drawn in by yarn.
See in the diagram, in order to bobbin case support 6 is fixedly prevented rotary motion, bobbin case support arranges the groove 34 of a radial directed, the fixing stop member 35 in position is embedded in described groove with a lug, thus pin yarn can be passed in the side of stop member 35 and groove 34 restriction face 36 between motion.
If now when loop length is greater than 2mm, pin 8 last is thrust a little to be moved towards pinprick center according to the motion of curve 21 in time range 31 by penelope at time point 18 and is greater than 1mm, so at two steering positions 32,33(Fig. 4 of producing pin yarn in lever jack 14, path between groove 34 and stop member 35).First on steering position 32 and then also reduced by thread friction in two steps altogether on steering position 33 being arranged in the yarn power F1 of the pin yarn region above penelope towards lever jack 14 orientation.That remaining is power F2, and this power is necessary for the yarn path of opening between the restriction face 36 of the side of stop member 35 and groove 34.
The size of power F2 is made a reservation for by knitting cycle and is therefore unmodifiable.In order to make this size again reach by the predetermined value of system, even if yarn power F1 also must improve with coefficient " K " (being approximately 2.5) when favourable material matches.When the pairing of disadvantageous material (cotton thread/be made up of cotton penelope), this coefficient " K " is tending towards value 4.The yarn power F of raising like this is carrying out by lever jack 14 the minimum stopping power equaling Yarn Brake 16 when yarn is drawn in.
Situation for time window 31 shown in Figure 5, wherein lever jack 14 tractive yarn ring and the yarn path of opening between the restriction face 36 of the side of stop member 35 and groove 34, wherein the ahead running of penelope is contrary relative to its ahead running in the diagram and realizes in the direction of the arrow in Figure 5.This roughly corresponds to such situation, the keyhole needle cycle described in producing when sewing or embroider in this case.Not only be wound around with yarn gripper yarn 37 at this pin yarn, and and wound upon themselves.This transmission direction and situation is there is hardly in this Sewing machines.
Usually this transmission direction and situation is there is in yarn gripper embroidery machine.By the strong winding on yarn steering position 32, coefficient " K " increases further.At pin yarn ring through after yarn path, pin yarn stress is almost reduced to zero.Lever jack 14 further reduces pin yarn ring, until pin yarn ring minimizes completely on position 30.On the path leading to this position pin yarn part 38(its lie in so far on penelope) to be formed at node 39 place and the friction of himself by pin yarn and cross the outstanding yarn coil 40 of penelope.This yarn coil must until lever jack (OT) time range 30 in again drawn in.Pin yarn part 41 goes to needle ring more suddenly, and this is drawn in successfully again, and leaves the surface of penelope at this.This steepness according to trigonometric function rule along with this time point penelope conveying experience displacement and reduce (according to curve 21, there already 75% loop length).According to the coefficient of friction of used pin yarn, reliably drawing in of yarn ring 40 is only possible in the maximum loop length belonging to it.
As the description as can be seen from Figure 4 and 5, improve the situation of necessary yarn stress based on such fact: the yarn path between the restriction face 36 of the side of stop member 35 and groove 34 only occurs in the middle of the current ahead running moved forward of penelope.This is yarn gripper or lopping activity and penelope transmits or the result of the activity overlapping of ahead running.
It is therefore clear that by the ahead running of embroidery frame start be advanced to draw high pin yarn by lever jack 14 time range in cause the inevitable raising of yarn stress.This however be unexpected in embroidery machine.
The movement profiles of the circle forming illustrated corresponding with the present invention in figure 3 corresponds to the curve map according to Fig. 2, except the motion of double-locked stitch-yarn gripper 2 and the distribution of curve 26,28 and 29 that is associated, that represent yarn demand and yarn release.
Because double-locked stitch-yarn gripper 2 such as rotates with " n=3 ", with regard to the anglec of rotation of being passed by by machine shaft, knitting cycle realizes than in the double-locked stitch-yarn gripper rotated with " n=2 " accordingly earlier with the larger angular speed of the double-locked stitch-yarn gripper 2 formed thus.This means, with regard to the anglec of rotation of machine shaft, the yarn ring release undertaken by double-locked stitch-yarn gripper 2 and twice around double-locked stitch-yarn gripper compared with realizes at a time point comparatively early, and therefore represent the position that discharges the time point 27 of yarn ring by double-locked stitch-yarn gripper mark according in the curve map of Fig. 3 relative to according in the curve map of Fig. 2 to shifting left.
Therefore with regard to the anglec of rotation of machine shaft, can starting at a corresponding time point comparatively early for motion that the ring formed of pin yarn and yarn gripper yarn is drawn in of lever jack 14, thus lever jack 14 correspondingly arrive earlier its movement locus top dead-centre (OT) and therefore with regard to the anglec of rotation of machine shaft knitting cycle correspondingly terminate earlier.
Knitting cycle and propelling separate now in time.Result is shown in Figure 6, during yarn path between the restriction face 36 that its remainder illustrating when yarn ring is passed in the side of stop member 35 and groove 34, in the yarn ring situation not long ago of lever jack (top dead-centre).The minimum yarn power (=stress) caused by system when applying rotation yarn gripper is represented by the resistance that yarn is to be overcome at this.
Compared with Figure 4 and 5, on needle plate and in penelope and in the arm of the yarn ring towered towards pin, no longer there is corresponding yarn steering position.Correspondingly owing to eliminating yarn steering position, also eliminate high frictional force and therefore eliminate the raising of 2.5 to 4 times of yam stopper power required so far relative to minimum yarn power.Therefore the present invention allows yarn gripper embroidery machine to run with such yarn stress, and its job security reason due to knitting cycle is only slightly higher than the minimum stress caused by system.

Claims (3)

1. single head or multi-head embroidery machine, it comprises circle forming and propulsion plant, described circle forming respectively by one with double-locked stitch-yarn gripper acting in conjunction to form coil, the pin of yarn is guided to form, described propulsion plant is for obtaining the relative motion between embroidery article and circle forming, the motion of described relative motion and pin realizes relatively, it is characterized in that, in order to reduce lopping stage and embroidery article ahead running between time-interleaving, double-locked stitch-yarn gripper rotates with the n rotating speed doubly that equals the speed of mainshaft, wherein " n " be greater than 2 integer.
2. single head or multi-head embroidery machine, it comprises circle forming and propulsion plant, described circle forming respectively by one with double-locked stitch-yarn gripper acting in conjunction with form coil, guide the pin of yarn to be formed, described propulsion plant is for obtaining the relative motion between embroidery article and circle forming, the motion of described relative motion and pin realizes relatively, it is characterized in that, time-interleaving between lopping stage and the ahead running of embroidery article, double-locked stitch-yarn gripper with relative to main shaft angular speed can periodically-varied angular speed rotate.
3. single head as claimed in claim 1 or multi-head embroidery machine, is characterized in that, between machine shaft and double-locked stitch-yarn gripper (2), arrange the transmission device that gearratio is 1:3.
CN201180015321.3A 2010-03-24 2011-03-19 Single-head or multi-head embroidery machine Active CN102918193B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE102010013016.8 2010-03-24
DE102010013016A DE102010013016A1 (en) 2010-03-24 2010-03-24 Single or multi-head embroidery machine with lockstitch circular gripper
PCT/EP2011/001369 WO2011116912A2 (en) 2010-03-24 2011-03-19 Single-head or multi-head embroidery machine having a two-thread lockstitch rotary looper

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CN102918193A CN102918193A (en) 2013-02-06
CN102918193B true CN102918193B (en) 2015-06-10

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EP (1) EP2550387B1 (en)
JP (1) JP5828884B2 (en)
KR (1) KR101951200B1 (en)
CN (1) CN102918193B (en)
DE (1) DE102010013016A1 (en)
ES (1) ES2606033T3 (en)
TW (1) TWI530602B (en)
WO (1) WO2011116912A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013001346A1 (en) 2013-01-28 2014-07-31 Zoje Europe Gmbh Embroidery machine with at least one lockstitch circular gripper

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US5860377A (en) * 1996-11-19 1999-01-19 Brother Kogyo Kabushiki Kaisha Sewing machine with a speed correcting unit and an independently driven main shaft and loop taker
CN200967877Y (en) * 2006-11-03 2007-10-31 中捷缝纫机股份有限公司 Differential feeding device for sewing machine

Also Published As

Publication number Publication date
EP2550387A2 (en) 2013-01-30
CN102918193A (en) 2013-02-06
JP5828884B2 (en) 2015-12-09
TW201139775A (en) 2011-11-16
DE102010013016A1 (en) 2011-09-29
WO2011116912A2 (en) 2011-09-29
WO2011116912A3 (en) 2012-04-05
KR20130009991A (en) 2013-01-24
EP2550387B1 (en) 2016-08-31
ES2606033T3 (en) 2017-03-17
KR101951200B1 (en) 2019-04-22
JP2013521957A (en) 2013-06-13
TWI530602B (en) 2016-04-21

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