EP1115933B1 - Betätigungsvorrichtung - Google Patents

Betätigungsvorrichtung Download PDF

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Publication number
EP1115933B1
EP1115933B1 EP99952462A EP99952462A EP1115933B1 EP 1115933 B1 EP1115933 B1 EP 1115933B1 EP 99952462 A EP99952462 A EP 99952462A EP 99952462 A EP99952462 A EP 99952462A EP 1115933 B1 EP1115933 B1 EP 1115933B1
Authority
EP
European Patent Office
Prior art keywords
linear motor
sewing
sewing machine
force
drive rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99952462A
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German (de)
English (en)
French (fr)
Other versions
EP1115933A1 (de
Inventor
Sevki Hosagasi
Helmut Jung
Michael Kilian
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Quick Rotan Elektromotoren GmbH
QUICK ROTAN ELECTROMOTOREN GmbH
Original Assignee
Quick Rotan Elektromotoren GmbH
QUICK ROTAN ELECTROMOTOREN GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Quick Rotan Elektromotoren GmbH, QUICK ROTAN ELECTROMOTOREN GmbH filed Critical Quick Rotan Elektromotoren GmbH
Publication of EP1115933A1 publication Critical patent/EP1115933A1/de
Application granted granted Critical
Publication of EP1115933B1 publication Critical patent/EP1115933B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet
    • D05B29/02—Presser-control devices

Definitions

  • the presser device of a sewing machine (in The following also includes the term "sewing machine” Sewing devices, the present Invention on sewing devices as well Refers to the position of the To fix the sewing material at the needle insertion and on the Sewing material in the transport phase a pressure force to exercise through which a transport device Can push the material.
  • a sewing machine with a Presser device known (US-A1 383 438), which a presser bar, a presser foot and one There is an electromagnet connected to a leaf spring that presses on the upper end of the presser bar.
  • the magnet serves on the one hand Moving the presser foot downwards from the resting to the Working position and on the other hand to generate the Pressure of the presser foot on the one to be sewn Workpiece.
  • a spring arranged on the presser bar Back movement of the presser foot into the rest position.
  • the pressure force caused by the electromagnet is with the help a stop screw set by this one Height-adjustable stop for the magnetic rod forms.
  • Another way to change the pressure is given by another screw that is on a strip-shaped plate acts.
  • a simple switch is provided for electromagnets has only 2 switching states and serves the To close and open the circuit.
  • the presser foot does not have a variable Current supply, but only by changing one Spring force set.
  • the leaf spring is said to cause the presser foot the usual short vertical ups and downs Can make movements while sewing. On this way it is prevented by the Square movement of the slider, not shown caused up and down movements of the presser foot cause corresponding movements of the magnetic rod. Otherwise this would happen with every downward movement hit the stop screw and a loud noise cause.
  • a sewing machine is known (DE-PS 822 190), with the help of a mechanical speed controller Speed dependent, i.e. with increasing speed increasing metabolic force is generated.
  • a mechanical working speed sensor is for fast running Sewing machines unsuitable.
  • the actuator as an actuator for the presser device at least one Has linear motor
  • the drive rod for Controlling the metabolic force that the Presser device exerts on the material, with is connected to the presser device, the power is transmitted to the Presser mechanism on immediate, mechanical simple yet precise way. Since the Force applied to the linear motor from the direction of the Current flow is dependent Presser device in a current flow direction raised and in the other direction of current flow depressed so that the presser device according to the teaching of the present invention by the Linear motor between a raised position and a lowered position is movable.
  • the linear motor is considered direct control element for the Presser device in a particularly convincing way Way appropriate to what is different from that in the past widespread approach, namely the Generation of the contact pressure by means of spring preload, differs in that, as the latter, technically traditional approach to raising the Presser device an additional Actuator, for example an electromagnet, required.
  • the linear motor serves at of the present invention not only for production the metabolic force, but is also used for lifting and lowering the presser device used.
  • the drive rod with the Presser device via at least one resilient low-mass coupling element in connection.
  • the drive rod of the linear motor from the presser device decouples so that the moving masses are kept low.
  • the DE-A-32 17 826 a hollow presser bar in which an appropriately trained shaft of the Presser foot is slidably received. On one pushes the shaft in the presser bar arranged spring, which in turn on a adjustable rod supports.
  • the shaft of the Presser foot is by means of a mounting plate in a slightly larger slot the hollow Presser bar added, creating a limited vertical movement of the Presser foot relative to the hollow Presser bar is possible.
  • the coupling element advantageously a coil spring. hereby is on the one hand the drive rod of the Linear motor from the presser device decoupled, on the other hand, however, is the desired one direct connection between the drive rod of the Linear motor and the presser device guaranteed.
  • the drive rod over arranged the presser device.
  • Such a configuration is used for power transmission from the drive rod of the linear motor to the Presser mechanism on mechanically special simple yet precise way.
  • Coupling element also in the form of a leaf spring be trained.
  • Such an embodiment is particularly useful if the Drive rod, for example from constructive Reasons, conveniently offset to the side Presser device is arranged.
  • the presser device which expediently program-controlled or button-controlled powerless is switchable, preferably has a Presser bar and a presser foot.
  • the linear motor is according to an advantageous Embodiment of the present invention so trained that the presser device at almost zero current flow in an upper one Position is held.
  • the present invention is the linear motor in essentially ironless. This has not immense advantage that on the moving parts the linear motor no additional magnetic Forces act, as with linear motors Iron parts is undesirably the case.
  • the linear motor has at least two preferably ring-shaped permanent magnets, with which the magnetic field is generated.
  • the material of the permanent magnets can be Iron, neodymium and boron are based on them Magnetic materials under inexpensive conditions very high energy densities can be achieved. With Such very high energy densities can also force required for the presser device are easily generated in an immediate manner.
  • the linear motor expediently has, among other things a housing, a middle piece and an air gap with Reel up.
  • the magnetic circuit can be inside the linear motor conveniently via the housing, over the middle section and over the air gap with Coil are closed.
  • the annular ones Permanent magnets spaced from each other the magnetization of one ring-shaped Permanent magnets advantageously against Magnetization of the other annular Permanent magnet is directed and / or wherein the Location of the annular permanent magnets in the housing of the Linear motor preferably through spacer rings is specified.
  • the coil can be conveniently in at least two sub-coils wound in opposite directions be divided, the total inductance of the Coil significantly smaller due to this type of winding than the inductance of a partial coil, so that a small electrical time constant of the linear motor is guaranteed; this is an angular synchronous Control of the motor power possible, and the Linear motor can be controlled very quickly.
  • split coil generates a force as soon as electrical current flows through the coil is.
  • This force is proportional to the current and regardless of the location of the coil, as long as the coil located in the homogeneous part of the magnetic field; the The direction of the force is of course the direction of the Current flow dependent, the direction and / or the strength of the current flow in the linear motor recommended by at least one Microprocessor is controllable.
  • the drive rod over guided at least two bearing bushes in the center piece.
  • the middle piece can be preferably central have provided opening in which a as Slide stone trained piece of iron is guided advantageously connected to the drive rod is.
  • a as Slide stone trained piece of iron is guided advantageously connected to the drive rod is.
  • / is the opening and / or that Optionally rectangular piece of iron educated.
  • the purpose of this piece of iron consist on the one hand against the drive rod Secure rotation; on the other hand, the Driving force of the coil on the iron piece on the Drive rod are transmitted.
  • this piece of iron can be used to transfer the Driving force on the drive rod via a Coil carrier be connected to the coil.
  • the middle piece can be preferably central have provided opening in which a Expediently made of steel made pin which is advantageously with the drive rod connected is.
  • the opening optionally as an elongated hole and the pin optionally rounded.
  • Sense and purpose of this pen are, on the one hand, the Secure drive rod against twisting; on the other hand, the driving force of the coil is said to be about the pin can be transferred to the actuator stem.
  • the above properties and characteristics are for a presser drive in a convincing way suitable, because this way the press force in Dependence on the speed of the sewing machine is adjustable.
  • the required pressure force for the presser mechanism is relatively high, so that a direct drive, as in this invention there are larger dimensions of the linear motor would require.
  • the actuator in order to have a compact design of the To ensure linear motor is the drive rod according to a particularly inventive development the actuator by at least one Preloaded spring element.
  • At least two spring elements are provided, these spring elements are in preferably on both sides of the center piece arranged to generate additional moments reliable way to prevent.
  • the linear motor should be in a de-energized state the presser device by means of the at least a spring element with a force against one Stitch plate of the sewing machine and against one Material pusher that is in the transport phase with its Teeth protruding above the top of the throat plate, press, preferably in about a third of the maximum force of the presser device is. At slow sewing speeds, this will Pressing force of the at least one spring element sewn, this pressure force if necessary can still be reduced by an appropriate current sent in a negative direction by the linear motor becomes.
  • the sewing machine stops in the corner of the seam Position where the needle is down.
  • the The presser device is then expedient switched off so that the sewing material is more comfortable Way can be rotated in the desired direction. As already indicated above, this can De-energizing the presser mechanism either program controlled or button controlled respectively.
  • the presser device moves at the beginning of the Transport phase up. This movement expresses that Coupling element together so that the force grows according to the hardness of the coupling element.
  • the drive rod of the linear motor would go through this Force difference are accelerated; however, since the Mass of the moving parts of the linear motor in the Compared to the presser bar is relatively large and there is also some friction assume that the drive rod of the Linear motor at the higher speeds of the The sewing machine does not move from its rest position.
  • Electromagnets are preferably low-mass, is sufficient a relatively small force from the linear motor the presser device in a short time Bring starting position.
  • the weaker that Coupling element is designed the better the Decoupling the drive rod of the linear motor from the presser device.
  • this requires a longer path of the drive rod when applying the metabolism, which is why the hardness of the Coupling element from case to case to the respective Application to be adapted.
  • the presser device If the presser device is raised, must the linear motor the preload of the optional provided at least one spring element overcome by which the drive rod is preloaded is. When the Presser device this is at least one Spring element tensioned so that the preload with the stroke of the presser device becomes larger.
  • the linear motor has time to be kept at least one force equivalent to the spring force applied. This is done first with the maximum Current then raised the presser device the current is lowered so that the Presser device in its upper position is held.
  • a magnetic attraction generating part is provided from ferromagnetic material.
  • the protruding part When the presser device is lowered, shows this protruding part has no effect. If the Presser device, however, their upper Approaching end position, the protruding part comes in the effective range of the permanent magnets. A part the magnetic field lines then runs over the protruding part so that an attraction in Direction of the permanent magnets arises; is therefore the direction of that attraction in opposite direction to the force of the preload through the spring elements.
  • the size of the Attraction depends on the mechanical structure:
  • the maximum attraction then occurs if the protruding, the magnetic Attracting part in the top Position of the presser device on the edge of the homogeneous magnetic field.
  • the Dimensioning of this unit should be like this be chosen so that the magnetic Attraction and the force of the bias by almost cancel the spring elements.
  • the fabric pusher turns the presser foot pushes up a certain distance the path change via the coupling element with the Spring constants exert a force on the Drive rod. If the force of the linear motor and the via the coupling element on the drive rod acting force in a preferred amount are approximately the same size, the drive rod remains stand in their rest position.
  • the coupling element at high speeds Sewing machine According to an essential to the invention Development of the present actuator increased preload. This can be accomplished, for example, in that the Current flow in the linear motor at high speeds Sewing machine has a DC component, whereby a constant force component of the linear motor is effected.
  • the DC component of the current flow depends on the time and / or depending on the speed of the Changeable sewing machine.
  • the Force component expediently with the speed, the dependence of the current change on the Speed determined by the construction of the sewing machine is; for this reason it is functional Dependence of the current flow on the speed of the Sewing machine after the first determination in the Sewing machine can be saved.
  • the force of the linear motor as a function of the angular position of the Main shaft of the sewing machine or also depending on the time to be able to change, can be used to so-called wiper function also with a linear motor operated presser device
  • the thread start after the Conventionally, cutting through a Wiper device in the direction of the seamstress on the Presser device placed.
  • Thread end from the presser device pinched that would be for looping the required amount of thread is deducted from the thread supply, see above that the pinched thread end remains visible.
  • the presser device is especially the presser foot, according to one essential development of the present invention Actuator at the first stitch formation switched off, for example by the force of the at least one spring element with the force of Linear motor is compensated. If now at the beginning of sewing the needle thread end under the presser device the needle thread end of the Presser device no longer held and can therefore do the same with the first stitch formation be pulled down as if it were on the Presser device would lie. After the first The linear motor is then preferred in stitch formation Switched to the normal sewing area.
  • Figure 1 shows a first embodiment of a Actuator according to the present Invention.
  • the for a sewing machine also includes sewing devices, whereby the present invention relates both to Sewing devices and sewing machines
  • actuator has a Presser device 3 for holding down the Sewing material during stitch formation and Sewing material transport on.
  • the linear motor presses 1 in the de-energized state, the presser device 3 with a force against a needle plate 4 Sewing machine and against a slider 5, which in the transport phase with his teeth over the Top of the throat plate 4 protrudes.
  • presser device 3 has one Presser bar 31 and a presser foot 32 on, the fabric slide 5 in the in Figure 1 shown raised position at the bottom of the presser foot 32 abuts (see also FIG. 2).
  • the actuator has Adjustment element for the presser device 3 Linear motor 1, the drive rod 10 for Controlling the metabolic force that the Presser device 3 exerts on the material, over a resilient low-mass coupling element 2 with the Presser device 3 is connected. On in this way the drive rod 10 of the Linear motor 1 from the presser device 3 decoupled so that the masses to be moved are small are held.
  • This coupling element 2 is the first embodiment shown in FIG an actuator around a coil spring. On the one hand, this results in the drive rod 10 of the linear motor 1 from the presser device 3 decoupled, on the other hand, however, is the desired one direct connection between the drive rod 10 of the Linear motor 1 and the presser device 3 guaranteed.
  • the drive rod 10 is above the Presser device 3 arranged. At a Such a configuration is used for power transmission from the drive rod 10 of the linear motor 1 on the Presser device 3 on mechanically special simple yet precise way.
  • Figure 2 is a second embodiment Actuator according to the present Invention shown.
  • This second embodiment differs from the first embodiment shown in Figure 1 essentially in that the coupling element 2 is in the form of a leaf spring.
  • a Such an embodiment is particularly useful then when the drive rod 10, for example for constructional reasons, laterally offset to Presser device 3 is arranged, such as this is shown in Figure 2.
  • Figure 3 shows a first in longitudinal section Embodiment of the linear motor 1, the Actuating device from Figure 1 or the Actuating device from Figure 2 assigned can; in FIG. 4 the linear motor 1 from FIG. 3 is in Supervision along the line IV - IV in Figure 3 shown.
  • the linear motor 1 has two rectangular ones Permanent magnets 11a, 11b with which the magnetic field is generated.
  • the material of the Permanent magnets 11a, 11b are based on iron, Neodymium and boron, as with these magnetic materials inexpensive conditions very high energy densities are achievable. With such very high ones Energy densities can also be used for Presser device 3 required force without be generated in an immediate manner.
  • the linear motor 1 also has, among other things Housing 12, a center piece 13 and an air gap with the coil 14. As a result, the magnetic circuit inside the linear motor 1 via the housing 12, over the middle piece 13 and over the air gap with Coil 14 are closed.
  • a force is hereby generated in the coil 14, once the coil 14 of electrical current is flowed through.
  • This force is proportional to Current and regardless of the location of the coil 14, as long as the coil 14 in the homogeneous part of Magnetic field is located; the direction of force is naturally by the direction of the current flow dependent, the direction and / or the strength of the Current flow in the linear motor 1 through a (in the Drawing not for the sake of clarity pictured) microprocessor is controllable.
  • the drive rod 10 is two Bearing bushes 15a, 15b guided in the middle piece 13.
  • the Center piece 13 has a centrally provided opening 13a, in which a formed as a sliding block Iron piece 16 is guided with the drive rod 10 is connected.
  • the opening 13a and the iron piece 16 is rectangular.
  • this piece of iron 16 is on the one hand, the drive rod 10 against rotation to back up; on the other hand, the driving force is said to Transfer iron piece 16 to the drive rod 10 become.
  • This piece of iron 16 is for the transmission of Driving force on the drive rod 10 via a Coil carrier 17 connected to the coil 14.
  • FIGS. 3 and 4 16 At the left end of the iron piece in FIGS. 3 and 4 16 is a protruding one (see FIG. 3), one magnetic attraction generating part 16a ferromagnetic material, in the present case made of steel, arranged.
  • Figure 5 shows a second in longitudinal section Embodiment of the linear motor 1, the Actuating device from Figure 1 or the Actuating device from Figure 2 assigned can; in Figure 6 is a sectional view of a Cable entry for the linear motor from Figure 5 shown.
  • FIGS. 3 and 4 illustrates second embodiment of the Linear motor 1 from FIGS. 3 and 4 illustrated first embodiment of the Linear motor 1 differs.
  • the second embodiment shown in Figure 5 of the linear motor 1 has two annular, radial magnetized and spaced apart Permanent magnets 11a, 11b with which the magnetic field is generated and its location in the Housing of the linear motor 1 through spacer rings 18a, 18b, 18c is specified.
  • the direction of the differs here Magnetization of the two permanent magnets if for example in one ring Permanent magnet 11a magnetically the inner surface South pole and the outer surface magnetically the north pole has, the direction of the magnetization at another annular permanent magnet 11b reversed.
  • the total inductance of the Coil 14 is essential due to this type of winding smaller than the inductance of a partial coil 14a, 14b is so that the linear motor 1 can be controlled very quickly is.
  • the partial coils 14a, 14b are on a coil carrier 17 wound from non-magnetic material.
  • This Coil carrier 17 is fixed with the aid of a pin 26 connected to the drive rod 10.
  • the drive rod 10 is hollow.
  • the sink 14 with the bobbin 17 is the movable part of the linear motor 1, the power supply to movable coil 14 according to the invention Figure 6 is solved, which is a sectional view of a Cable entry for the linear motor 1 from FIG. 5 illustrates:
  • An electrical, for example two-wire Connection line 21 for the coil 14 is through a Recess 13b of the middle piece 13 and through the hollow drive rod 10 outwards. Since the Coil carrier 17 with the help of the pin 26 firmly with the Drive rod 10 is connected to act in the Movement of the coil 14 on the electrical Connection line 21 no tensile forces.
  • the end of Connection line 21 is with a plug 20th connected, which at the same time the strain relief of Mating connector includes.
  • the first shown in Figures 3 and 4 Embodiment of the linear motor 1 and in the Figures 5 and 6 shown second Embodiment of the linear motor 1 is common, that the drive rod 10 via two bearing bushes 15a, 15b in the middle piece 13 out.
  • the middle piece 13 has a centrally provided opening 13a, in which is a steel pin 26 guided with the Drive rod 10 is connected.
  • the Opening 13a as an elongated hole and the pin 26 round educated.
  • this pen 26 exists - as does with respect to the iron piece 16 according to the in the Figures 3 and 4 shown first embodiment of the linear motor 1 - in it, on the one hand the Secure drive rod 10 against rotation; on the other hand, the driving force via the pin 26 are transmitted to the drive rod 10.
  • the drive rod 10 at illustrated with reference to Figures 3 and 4 Embodiment of the linear motor 1 by two Spring elements 19a, 19b biased to both Sides of the center piece 13 are arranged around a additional torque generation in a reliable way to prevent; when using FIGS. 5 and 6 illustrated second embodiment of the Linear motor 1 is the drive rod 10 through one Spring element 19 biased.
  • the linear motor 1 presses in the de-energized state Condition the presser device 3 by means of Spring elements 19a, 19b (see FIGS. 3 and 4) or by means of the spring element 19 (see FIG. 5) a force against the throat plate 4 (see FIG. 1 and 2) the sewing machine, which is in about a third of the maximum force of the presser device 3 is.
  • this pressing force of the spring elements 19a, 19b (cf. Figures 3 and 4) and the spring element 19 (see. Figure 5) sewn, this pressure force if necessary can still be reduced by a corresponding current in the negative direction through the Linear motor 1 is sent.
  • the presser device 3 then becomes weak switched so that the sewing material in a comfortable way the desired direction can be turned.
  • This De-energizing the presser device 3 can either program controlled or button controlled respectively.
  • the well-known transport mechanism of the sewing machine presses at a known angular position Main shaft of the sewing machine with the fabric pusher 5 the presser foot 32 by the distance ⁇ s (cf. the Figures 1, 2 and 8) upwards, the teeth of the Slider 5 grasp the material. After that is done depending on the stitch length set linear movement in the direction of transport. Subsequently the slider 5 is lowered.
  • the drive rod 10 of the linear motor 1 makes the movement of the presser foot 32 at slow speeds n of the sewing machine. This means that when the presser foot 32 goes up by the distance ⁇ s, the drive rod 10 also moves up by the same distance ⁇ s because the time of the transport phase is long enough.
  • the actual stitch length L remains constant in a lower speed range from n 0 to n 1 of the sewing machine (cf. FIG. 7, in which a diagram of the size of the actual stitch length L as a function of the speed n of the sewing machine is shown).
  • the up and down movement of the drive rod 10 causes vibrations and noises.
  • the opposite winding direction of the partial coils 14a, 14b ensures a small electrical time constant of the linear motor 1, so that the above-described angularly synchronous control of the motor force is possible.
  • the motor current is reduced (see FIG. 8, in which a diagram of the motor current I as a function of the angle of rotation ⁇ of the main shaft of the sewing machine is shown), which at the same time keeps the heating of the partial bobbins 14a, 14b (see FIG. 5) low becomes.
  • the pretensioning of the coupling element 2 must be increased. This is achieved by means of a constant force component of the linear motor 1 by means of a DC component I G which can be varied as a function of the speed (cf. FIG. 8). This force increases with the speed n of the sewing machine, the dependence of the current change ⁇ I on the speed n being determined by the design of the sewing machine; For this reason, this functional dependency is determined once and saved.
  • L 1 shows the curve of the actual stitch length L without control corrections
  • L 2 shows the curve of the actual stitch length L, in which the "dent", that is the temporary decrease in the actual stitch length L in the middle speed range from n 1 to n 3 Sewing machine is eliminated by applying the counterforce explained above and in which the drop in the curve of the actual stitch length L "to the right", that is to say shifted to a higher speed range n> n 3 of the sewing machine, due to the DC component I G (cf. FIG.
  • the electrical time constant of the linear motor 1 has a disadvantageous effect on the current build-up.
  • the time in which the fabric pusher 5 moves the fabric presser foot 32 becomes shorter than the time for the current increase in the linear motor 1.
  • the switch-on angle 3 of the current is advanced by ⁇ depending on the speed at high speeds n> n 3 of the sewing machine (cf. FIG. 8). This ensures that the linear motor 1 can achieve the required counterforce when the presser foot 32 begins to move.
  • the force of the linear motor 1 as a function of the angular position the main shaft of the sewing machine or also time-dependent to be able to change can be used to so-called wiper function also with one linear motor operated presser foot 32 too fulfill.
  • wiper function also with one linear motor operated presser foot 32 too fulfill.
  • Thread end pinched by the presser foot 32 see above would be the one needed for looping Thread quantity deducted from the thread supply, so that pinched thread end remains visible.
  • the linear motor 1 When the presser device 3 is raised, the linear motor 1 must have the pretensioning force Spring elements 19a, 19b (see FIGS. 3 and 4) or the spring element 19 (see FIG. 5), through which the drive rod 10 is biased. at an upward movement of the presser device 3 these spring elements 19a, 19b or will Spring element 19 tensioned so that the biasing force with the lifting of the presser device 3 larger becomes.
  • Linear motor 1 At least one of the spring force equivalent force.
  • the maximum current is used first Presser device 3 raised and then the Current lowered so that the Presser device 3 in its upper position is held.
  • a magnetic attraction generating part 16a made of ferromagnetic material is provided. If the presser device 3 is lowered, this protruding part 16a shows no effect. If the presser device 3, however, is approaching its upper end position projecting part 16a in the scope of Permanent magnets 11a, 11b. Part of the magnetic Field lines then run over the protruding part 16a, so that an attraction in the direction of Permanent magnets 11a, 11b are created; therefore it is Direction of this attraction in opposite Direction to the force of the preload by the Spring elements 19a, 19b (see FIGS. 3 and 4).
  • the magnitude of the attraction depends on the mechanical Construction from. The maximum attraction occurs here then when the protruding, the magnetic Attraction generating part 16a in the top Position of the presser 3 on the edge of homogeneous magnetic field.
  • the Dimensioning of this unit should be like this be chosen so that the magnetic Attraction and the force of the bias by the spring elements 19a, 19b (see FIGS. 3 and 4) almost cancel.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Control Of Linear Motors (AREA)
  • Press Drives And Press Lines (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Massaging Devices (AREA)
  • Valve Device For Special Equipments (AREA)
EP99952462A 1998-09-26 1999-09-22 Betätigungsvorrichtung Expired - Lifetime EP1115933B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19844201 1998-09-26
DE19844201 1998-09-26
PCT/EP1999/007061 WO2000018997A1 (de) 1998-09-26 1999-09-22 Betätigungsvorrichtung

Publications (2)

Publication Number Publication Date
EP1115933A1 EP1115933A1 (de) 2001-07-18
EP1115933B1 true EP1115933B1 (de) 2003-12-17

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EP99952462A Expired - Lifetime EP1115933B1 (de) 1998-09-26 1999-09-22 Betätigungsvorrichtung

Country Status (12)

Country Link
US (1) US6564732B1 (cs)
EP (1) EP1115933B1 (cs)
JP (1) JP2002525185A (cs)
KR (1) KR20010082212A (cs)
CN (1) CN1218077C (cs)
AT (1) ATE256779T1 (cs)
BR (1) BR9914052A (cs)
CZ (1) CZ2001967A3 (cs)
DE (2) DE19945443A1 (cs)
ES (1) ES2213392T3 (cs)
MX (1) MXPA01003083A (cs)
WO (1) WO2000018997A1 (cs)

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US8329217B2 (en) 2001-11-06 2012-12-11 Osmotica Kereskedelmi Es Szolgaltato Kft Dual controlled release dosage form
US6930411B2 (en) * 2002-11-19 2005-08-16 Quick-Rotan Elektromotoren Gmbh Linear motor
CN1807738B (zh) * 2006-01-26 2010-11-10 浙江新杰克缝纫机有限公司 缝纫机针杆驱动装置
DE102007052876A1 (de) * 2007-11-07 2009-05-20 Dürkopp Adler AG Nähmaschine
DE102007057833A1 (de) * 2007-11-30 2009-06-04 Etel S.A. Linearführung mit integriertem Linearmotor
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CN104862886B (zh) * 2015-06-12 2017-06-16 吴江市震宇缝制设备有限公司 一种辅助压脚静电除尘器
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US6564732B1 (en) 2003-05-20
ATE256779T1 (de) 2004-01-15
CN1218077C (zh) 2005-09-07
CN1320181A (zh) 2001-10-31
JP2002525185A (ja) 2002-08-13
ES2213392T3 (es) 2004-08-16
EP1115933A1 (de) 2001-07-18
BR9914052A (pt) 2001-11-20
CZ2001967A3 (cs) 2001-11-14
DE59908131D1 (de) 2004-01-29
DE19945443A1 (de) 2000-07-13
MXPA01003083A (es) 2003-03-27
WO2000018997A1 (de) 2000-04-06

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