EP0028314A2 - Dispositif de déclenchement électromagnétique, en particulier pour l'actionnement de marteaux d'impression - Google Patents

Dispositif de déclenchement électromagnétique, en particulier pour l'actionnement de marteaux d'impression Download PDF

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Publication number
EP0028314A2
EP0028314A2 EP80105795A EP80105795A EP0028314A2 EP 0028314 A2 EP0028314 A2 EP 0028314A2 EP 80105795 A EP80105795 A EP 80105795A EP 80105795 A EP80105795 A EP 80105795A EP 0028314 A2 EP0028314 A2 EP 0028314A2
Authority
EP
European Patent Office
Prior art keywords
magnets
magnet
coil
arrangement according
movement
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.)
Granted
Application number
EP80105795A
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German (de)
English (en)
Other versions
EP0028314B1 (fr
EP0028314A3 (en
Inventor
Hans-Gordon Dr. Seifert
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0028314A2 publication Critical patent/EP0028314A2/fr
Publication of EP0028314A3 publication Critical patent/EP0028314A3/de
Application granted granted Critical
Publication of EP0028314B1 publication Critical patent/EP0028314B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/38—Electromagnetic means

Definitions

  • the invention relates to an electromagnetic release device which can be used in particular for driving pressure hammers.
  • a large number of printing hammer drives are known, including from German Patent 1,276,380 (Docket 25 450a), in which the printing hammer is carried by two parallel leaf springs clamped on one side. The energy stored in the deflected state of the print hammer is used to actuate the print hammer. The print hammer is held in a pre-tensioned position by an electromagnet. In the case of printing hammer drives of this type, however, a relatively high amount of energy must be used to actuate the printing hammer.
  • German Offenlegungsschrift 28 37 550 (Docket GE 978 023) and 28 37 602 (Docket GE 978 024) arrangements for use in printers are described which make use of so-called rare earth magnets.
  • the arrangement according to OS 28 37 550 describes a method for operating a holding system for release devices with a moving element, which is characterized in that the released moving element is accelerated in the direction of action by the action of magnetic forces or by the action of a spring, and that for the holding state by Superposition of the potential field based on one or more magnetic cutting edges with another potential field on a mechanical bias of the movement element by the spring and / or on a magnet, an overall potential distribution with a relatively stable holding position of high potential energy for the movement element is generated, from which the movement element is triggered by the application of a triggering force that overcomes the holding position.
  • An arrangement for carrying out this method is characterized in that a moving element provided with a first magnet is provided, which can be moved past one or more other magnets, and in that a further magnet which determines the relatively stable holding position is provided.
  • the arrangement according to OS 28 37 602 represents an arrangement for a contactless conversion of rotational energy into energy of a translational or pivoting movement of a spring-mass oscillator, which is characterized in that a first magnet is arranged on the spring-mass oscillator that a second magnet is arranged on a rotatable shaft such that the second magnet or a magnetically conductive element connected to it can be moved past the first magnet with the formation of magnetic cutting forces, as a result of which the spring-mass oscillator can be deflected.
  • FIG. 1 an electrically controlled hard hammer release device is shown in a schematic sectional view.
  • a coil-wound magnet 3 is movably arranged between two stationary magnets 1 and 2.
  • the magnet 3 is shorter in the direction of movement D than the stationary one Magnets 1 and 2.
  • the direction of magnetization of the stationary magnets 1 and 2 is the same and marked M1 and M2.
  • the magnetization direction M3 of the movable magnet 3 is opposite to the magnetization direction of the first two magnets 1 and 2.
  • the magnetization direction of all magnets 1, 2, 3 is perpendicular to the direction of movement D of the magnet 3.
  • a coil 4 is arranged around the magnet 3.
  • this coil is subject to the condition that the winding parts 4-1 (drawn in black) which are essential for the force action during the triggering process run within the space of high magnetic flux density enclosed by the magnets 1 and 2.
  • the part of the coil marked with 4-2 outside this space lies in an area of lower magnetic flux density and therefore only makes a minor contribution to the release force.
  • Magnets that are difficult to demagnetize must be used as magnets. These conditions are met in particular by rare earth magnets. Because of their large magnetic energy density, only small magnet volumes are required and the magnets maintain their magnetization even in open magnetic circuits with repulsive magnets.
  • the movable action member 9 is forced into a stop position 8 indicated by the arrow S.
  • This stop position can be formed, for example, by an adjusting screw 7, which is attached in the sole of the U-shaped support 6 for the magnets 1 and 2.
  • the movable magnet 3 and the coil 4 are cast into a base body with a hammer head 5 (see also FIG. 3), which in its entirety forms the action member 9.
  • the coil 4 is acted upon by a trigger current.
  • the coil part 4-1 in the magnetic field Magnets 1 and 2 generate the essential force to act in the direction of arrow D (this force would be canceled if the coil part 4-2 were also in the same field between magnets 1 and 2).
  • the magnet 3 arrives from the area of the cutting forces acting in the direction S via an equilibrium position in the area of the cutting forces acting in the direction D.
  • the action element 9 experiences the kinetic energy required for the printing process through these cutting forces.
  • Magnetic cutting forces are understood to be those which occur when magnets which are attracting or repelling each other move in the direction of movement.
  • the resetting of the action member 9 can tion g angsposi- in its off with the aid of mechanical return forces or with the aid of a carried to the spool 4 to be given return current.
  • the coil part 4-2 would have to be in the deflected position of the action member 5 in the area of strong magnetic flux density between the magnets 1 and 2.
  • a reset current would then be one Apply force in direction of arrow S. This would overcome the magnetic cutting forces acting in the direction of the arrow D until the magnetic cutting forces acting in the direction of the arrow S between the magnets 1 and 3 or 2 and 3 would force the action member 9 into its stop position.
  • a print hammer bank is shown in an exploded, perspective view.
  • the adjusting screw 7 for the stop position of the action member 9 is omitted in this illustration.
  • the action member 9 is designed as a pressure hammer; it is supported in a known manner on two leaf springs 10 and 11.
  • the coil connections are marked with 12 and 13, they can be connected to the leaf springs 10 and 11, via which the current supply would then take place.
  • the base body of this link could be constructed in a plastic shell construction including the magnet 3 and the coil 4.
  • the print hammer head 9 could have a metallized surface on its face.
  • the leaf springs 10 and 11 can, for. B.
  • each printing hammer consists of a base body in which a magnet and a coil surrounding it are embedded. Each print hammer is guided by two leaf springs. The two print hammers are offset from one another in such a way that their leaf springs are fixed at opposite points on the print hammer bank and that their hammer heads are aligned in a row.
  • the base body of the print hammer bank is identified by 14-5, the two print hammers by 14 and 15.
  • the print hammer 14 contains the magnet 14-1 with the coil 14-2 surrounding it. It is connected to the upper leg of the base body 14-5 via the leaf spring 14-3 and 14-4. The same applies correspondingly to the hammer 15 lying under the hammer 14 in the illustration according to FIG. 4, the magnet of which is identified by 15-1 and the coil surrounding this magnet by 15-2.
  • the leaf springs 15-3 and 15-4 supporting it are connected to the lower leg of the base body 14-5.
  • the illustration of the stationary magnets enclosing the magnets 14-1 and 15-1 has been omitted for reasons of simplification. With a corresponding current flow of the coils 14-2 or 15-2, the corresponding pressure hammer experiences a force in the direction of arrow D for the triggering process.
  • a common return device is provided for the common resetting of all print hammers of the print hammer bank into their starting position seen.
  • This consists of a guide piece 18 which is movably arranged to and fro in a guide 23 and which is connected to the rear ends of the pressure hammers 14 and 15 via elastic elements 16 and 17. These elastic elements can be tension springs.
  • the guide piece 18 is driven by an eccentric drive 21/20. This eccentric drive (stationary axis 21 with an eccentric eccentric disc) acts in a recess 19 in the guide piece 18.
  • the guide piece 18 executes a lifting movement within the guide 23, as a result of which the deflected pressure hammers are moved by the elastic elements over the range of the direction
  • the magnetic cutting forces acting in the direction of the magnetic cutting forces acting in the direction S are withdrawn into their starting position.
  • the starting position is determined by the stops 14-6 and 14-7.
  • FIG. 5 shows an exploded perspective view of three magnet pairs, one of which is movably arranged connected to a coil between the remaining stationary other magnet pairs.
  • both sides (23-1 and 23-2) of the coil 23 of the action member 24 are always in an area of high magnetic; Flux density that is generated by the magnet pair 22-2 / 22-3 or 21-2 / 21-3 1.
  • the magnet pairs 22-2 / 22-3 and 21-2 / 21-3 are arranged adjacent to each other and aligned.
  • the magnets of these magnet pairs are spaced apart from one another to such an extent that an action element 24 movable in the direction of arrow D can be arranged between them.
  • This action element consists of the sequence of a magnet 22-1, a coil 23 and a magnet 21-1.
  • the magnet 22-1 is located between the magnets 22-2 and 22-3, the magnet 21-1 between the magnets 21-2 and 21-3.
  • the magnets 22-1 and 21-1 (seen in the direction of movement of the action member 24) have a shorter length than the magnets 22-2, 22-3, 2,1-2 and 21-3.
  • the coil 23 arranged between the magnets 22-1 and 21-1 remains sufficient space, on the one hand, with its coil parts 23-1 and 23-2, which are decisive for the force action in the direction of arrow D, between the magnets 22-2 and 22-3 and on the other hand to lie between the magnets 21-2 and 21-3.
  • the magnetization direction M22-2 and M22-3 of the magnets 22-2 and 22-3 is the same and the magnetization direction M22-1 of the magnet 22-1 arranged between them is opposite.
  • the magnetization direction M21-2 and M21-3 of the magnets 21-2 and 21-3 is the same and directed opposite to the M21-1 of the magnet 21-1 lying between them; however, the magnetization directions M22-1 and M22-2 are opposite to each other.
  • Such an arrangement results in a force effect in the direction of the arrow D when a current flows in the coil parts 23-1 and 23-2.
  • the special configuration of this arrangement according to FIG. 5 makes it possible for both coil parts 23-1 to be triggered when the action member 24 is triggered and 23-2 to participate equally (in contrast to the arrangement according to FIG. 1). However, this possibility requires a higher design effort.
EP80105795A 1979-11-02 1980-09-25 Dispositif de déclenchement électromagnétique, en particulier pour l'actionnement de marteaux d'impression Expired EP0028314B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2944287 1979-11-02
DE19792944287 DE2944287A1 (de) 1979-11-02 1979-11-02 Elektromagnetische ausloesevorrichtung, insbesondere fuer den antrieb von druckhaemmern

Publications (3)

Publication Number Publication Date
EP0028314A2 true EP0028314A2 (fr) 1981-05-13
EP0028314A3 EP0028314A3 (en) 1982-09-08
EP0028314B1 EP0028314B1 (fr) 1985-02-13

Family

ID=6084986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105795A Expired EP0028314B1 (fr) 1979-11-02 1980-09-25 Dispositif de déclenchement électromagnétique, en particulier pour l'actionnement de marteaux d'impression

Country Status (4)

Country Link
US (1) US4343239A (fr)
EP (1) EP0028314B1 (fr)
CA (1) CA1150338A (fr)
DE (2) DE2944287A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990014368A1 (fr) * 1989-05-19 1990-11-29 E.I. Du Pont De Nemours And Company Preparation de cyano perfluoropolymeres contenant des sites de durcissement iodiques

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935939A1 (de) * 1979-09-06 1981-03-26 AEG Olympia Office GmbH, 26419 Schortens Elektrodynamische anschlagvorrichtung fuer ein druckwerk
US4420714A (en) * 1981-10-02 1983-12-13 Polaroid Corporation Apparatus for continuously incrementing an output member
DE3147449C2 (de) * 1981-12-01 1984-03-08 Olympia Werke Ag, 2940 Wilhelmshaven Elektrodynamische Anschlagvorrichtung für ein Druckwerk in Schreib- oder ähnlichen Büromaschinen
US4458227A (en) * 1982-04-12 1984-07-03 Polaroid Corporation Electromagnetic actuators
US4531820A (en) * 1983-06-22 1985-07-30 Polaroid Corporation Electromagnetic actuator generating equal and opposing force vectors
US4558937A (en) * 1984-02-06 1985-12-17 Polaroid Corporation Electromagnetic blade mechanism
US10110109B2 (en) * 2014-06-11 2018-10-23 Aston Gustavous Farquharson Self-powered alternative energy machine to generate electricity
US9692275B2 (en) 2014-06-11 2017-06-27 Aston Gustavous Farquharson Alternative energy generator
WO2016085643A1 (fr) * 2014-11-07 2016-06-02 NuSpecies Global Machines Corporation Machine à énergie de substitution auto-alimentée pour produire de l'électricité

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459976A (en) * 1966-07-05 1969-08-05 Mohawk Data Sciences Corp Rotary electrodynamic driver
US3606834A (en) * 1969-06-24 1971-09-21 Mohawk Data Sciences Corp Printer having a permanent magnet hammer mechanism
US3635156A (en) * 1969-10-06 1972-01-18 Ncr Co Fatigue-resistant attachment for highly stressed members such as print hammers
EP0008660A1 (fr) * 1978-08-29 1980-03-19 International Business Machines Corporation Structure en forme d'un système magnétique symétrique d'arrêt pour un dispositif de déclenchement ayant un élément mobile, p. ex. marteau de frappe

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1264120B (de) * 1964-07-25 1968-03-21 Ibm Deutschland Druckhammerwerk und Verfahren zum Justieren seiner Magnetjoche

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459976A (en) * 1966-07-05 1969-08-05 Mohawk Data Sciences Corp Rotary electrodynamic driver
US3606834A (en) * 1969-06-24 1971-09-21 Mohawk Data Sciences Corp Printer having a permanent magnet hammer mechanism
US3635156A (en) * 1969-10-06 1972-01-18 Ncr Co Fatigue-resistant attachment for highly stressed members such as print hammers
EP0008660A1 (fr) * 1978-08-29 1980-03-19 International Business Machines Corporation Structure en forme d'un système magnétique symétrique d'arrêt pour un dispositif de déclenchement ayant un élément mobile, p. ex. marteau de frappe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990014368A1 (fr) * 1989-05-19 1990-11-29 E.I. Du Pont De Nemours And Company Preparation de cyano perfluoropolymeres contenant des sites de durcissement iodiques

Also Published As

Publication number Publication date
DE2944287A1 (de) 1981-05-14
CA1150338A (fr) 1983-07-19
US4343239A (en) 1982-08-10
DE3070166D1 (en) 1985-03-28
EP0028314B1 (fr) 1985-02-13
EP0028314A3 (en) 1982-09-08

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