EP0028314B1 - 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

Info

Publication number
EP0028314B1
EP0028314B1 EP80105795A EP80105795A EP0028314B1 EP 0028314 B1 EP0028314 B1 EP 0028314B1 EP 80105795 A EP80105795 A EP 80105795A EP 80105795 A EP80105795 A EP 80105795A EP 0028314 B1 EP0028314 B1 EP 0028314B1
Authority
EP
European Patent Office
Prior art keywords
magnets
magnet
coil
release
arrangement
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
Application number
EP80105795A
Other languages
German (de)
English (en)
Other versions
EP0028314A2 (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

Links

Images

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, 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 biased position by an electromagnet. In the case of printing hammer drives of this type, however, a relatively high amount of energy has to be used to actuate the printing hammer.
  • 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 DE-A-2 837 602 represents an arrangement for a contact-free 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, 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 print 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 magnets 1 and 2.
  • the direction of magnetization of the stationary magnets 1 and 2 is the same and is identified by 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 black) which are essential for the force action during the triggering process have a high magnetic flux within the space enclosed by the magnets 1 and 2 run dense.
  • 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 magnet 3 passes from the area of the cutting forces acting in the direction S via an equilibrium position into the area of the cutting forces acting in the direction D.
  • the movement element 9 experiences the kinetic energy required for the printing process.
  • Magnetic cutting forces are understood to be those which occur in the direction of movement when magnets which are attracting or repelling one another move past.
  • the movement element 9 can be reset in its starting position with the aid of mechanical restoring forces or with the aid of a restoring current to be supplied to the coil 4.
  • the coil part 4-2 would have to be in the deflected position of the movement element 9 in the area of strong magnetic flux density between the magnets 1 and 2.
  • a reset current would then require a force in the 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.
  • each printing hammer consists of a base body in which a magnet and a coil surrounding it are embedded. Every print hammer will 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 via the leaf springs 14-3 and 14-4 to the upper leg of the base body 14-5. The same applies 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 is identified 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 effect in the direction of arrow D for the triggering process.
  • a common return device is provided for the common return of all print hammers of the print hammer bank into their starting position.
  • 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 D acting magnetic cutting forces in the area of the magnetic cutting forces acting in the direction S are withdrawn to their starting position.
  • the starting position is determined by the stops 14-6 and 14-7.
  • FIG. An exploded perspective view of three magnet pairs is shown, 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 moving element 24 are always in an area of high magnetic flux density, which is generated by the magnet pair 22-2 / 22-3 and 21-2 / 21-3 becomes.
  • the magnet pairs 22-2 / 22-3 and 21-2 / 21-3 are arranged adjacent to each other and aligned.
  • the magnets of these pairs of magnets are so far apart from one another that a movement element 24 movable in the direction of arrow D can be arranged between them.
  • This moving 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 movement element 24) have a shorter length than the magnets 22-2, 22-3, 21-2 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.

Claims (7)

1. Dispositif de déclenchement électromagnétique comportant un élément d'entrainement (9) doté d'au moins un premier aimant (3), lequel élément (9) est monté mobile selon des forces de cisaillement magnétiques entre d'autres seconds aimants (1,2)
où ledit premier aimant (3) peut etre déplacé au moyen d'une force de déclenchement résultant de l'amorçage d'une bobine de déclenchement (4) se trouvant dans ledit élément d'entraine- ment (9) et induisant un champ magnétique parallèle aux champs magnétiques desdits seconds aimants (1, 2), laquelle force de déclenchement s'exerce à l'encontre des forces de cisaillement magnétiques, d'une position initiale dans une position à partir de laquelle lesdites forces de cisaillement magnétiques font avancer ledit dispositif d'entainement (9) dans une direction (d) opposée à sa position initiale,
et où ledit dispositif d'entrainement (9) est relié avec un ou plusieurs ressorts (10, 11) dont la force de rappel ramènent partiellement ou entièrement ledit élément d'entrainement (9) d'une position fléchie dans sa position initiale, caractérisé en ce que,
ledit premier aimant (3) peut etre placé par lesdites forces de cisaillement magnétiques dans une position initiale formée par une butée fixe (8) et, en ce que ledit premier aimant (3) est entouré par une bobine de déclenchement (4) induisant un champ magnétique parallelle auxdits champs magnétiques desdits aimants (1, 2, 3), où une partie de ladite bobine (4-1) provoquant une force dans le sens de déclenchement (D) se trouve dans l'espace formé par lesdits aimants (1, 2) entre lesquels se trouve ledit premier aimant (3).
2. Dispositif selon la revendication 1, caractérisé en ce que,
les parties (4-2) de ladite bobine de déclenchement (4) se trouvent dans l'espace entre lesdits aimants (1, 2) lorsque ledit élément d'entraine- ment (9) est dans la position fléchie,
et en ce que, lors de l'amorçage correspondant de ladite bobine de déclenchement (4) pour déplacer ledit élément d'entrainement (9), celui-ci subit une force qui le ramène dans sa position initiale (8).
3. Dispositif selon la revendication 1, caractérisé en ce que,
ledit élément d'entrainement (24) comporte deux aimants disposés l'un après l'autre (22-1,21-1) et une bobine de déclenchement (23) disposée entre ces deux aimants,
en ce que le premier aimant (22-1) est mobile entre deux aimants stationnaires (22-2, 22-3) et le second aimant entre deux seconds aimants stationnaires (21-2, 21-3) et,
en ce que les parties (23-1, 23-2) de ladite bobine provoquant la force pour déclencher ledit élément d'entrainement se trouvent dans l'espace compris entre la première paire d'aimants stationnaires (22-2, 22-3) et la seconde paire d'aimants stationnaires (21-2, 21-3).
4. Dispositif selon une des revendications 1 à 3 ci-dessus permettant d'entrainer des marteaux d'impression.
5. Dispositif selon une des revendications 1 à 4, caractérisé en ce que, ledit élément d'entrai- nement est positionné au moyen de ressorts à lame (10, 11; 14-4, 14-5; 15-3,15-4).
6. Dispositif selon une des revendications 4 ou
5, caractérisé en ce que,
plusieurs éléments d'entrainement (14, 15), chacun représentant un marteau d'impression, sont rassemblés pour former une série de marteaux d'impression,
en ce que lesdits éléments d'entrainement des marteaux d'impression contigues sont disposés opposés les uns aux autres et,
en ce que lesdits marteaux d'impression sont reliés au moyen d'un ressort (16, 17) doté d'un dispositif de rappel commun à commande excentrique (18).
7. Dispositif selon la revendication 4, caractérisé en ce que, des éléments d'entrainement voisins (9, 24) on respectivement en commun un ou plusieurs aimants stationnaires.
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 EP0028314A2 (fr) 1981-05-13
EP0028314A3 EP0028314A3 (en) 1982-09-08
EP0028314B1 true 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)

Families Citing this family (10)

* 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
US4973634A (en) * 1989-05-19 1990-11-27 E. I. Du Pont De Nemours And Company Preparation of bromo-containing perfluoropolymers having iodine curesites
US9692275B2 (en) 2014-06-11 2017-06-27 Aston Gustavous Farquharson Alternative energy generator
US10110109B2 (en) * 2014-06-11 2018-10-23 Aston Gustavous Farquharson Self-powered alternative energy machine to generate electricity
CN113346673A (zh) * 2014-11-07 2021-09-03 纳斯佩谢丝全球机械公司 产生电力的自供电的替代能量机器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (4)

* 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
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
BE757078A (fr) * 1969-10-06 1971-03-16 Ncr Co Procede destine a lier une piece metallique et une matiere polymere moulee

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
CA1150338A (fr) 1983-07-19
EP0028314A2 (fr) 1981-05-13
DE3070166D1 (en) 1985-03-28
DE2944287A1 (de) 1981-05-14
US4343239A (en) 1982-08-10
EP0028314A3 (en) 1982-09-08

Similar Documents

Publication Publication Date Title
DE1122588B (de) Elektromagnetischer Vielfachschalter fuer Fernmelde-, insbesondere Fernsprechanlagen
EP0028314B1 (fr) Dispositif de déclenchement électromagnétique, en particulier pour l'actionnement de marteaux d'impression
DE3715304C2 (fr)
DE69918197T2 (de) Hybrid-Typ Magnet und diesen enthaltender Schrittmotor
DE2652339C2 (de) Elektrodynamische Betätigungsvorrichtung für einen Drucker
DE2629235A1 (de) Druckvorrichtung fuer rechen-, buchhaltungs- und aehnliche druckmaschinen
DE2817623A1 (de) Drahtdrucker
EP0063233B1 (fr) Elément d'actionnement électromagnétique
EP0134827A1 (fr) Entraînement électromagnétique pour mouvements linéaires ou rotatifs continus et pas à pas
EP0014737B1 (fr) Commande électromagnétique
DE2452325A1 (de) Elektromagnetische anschlagvorrichtung fuer drucker
DE2249125B1 (de) Drucker mit einer auswaehlanordnung fuer druckelemente
DE2305362A1 (de) Elektromagnetische betaetigungsvorrichtung fuer einen schreibstift eines punktdruckgeraetes
DE2235225A1 (de) Verfahren und vorrichtung zum einlesen bei kartenschlagmaschinen, jacquardmaschinen oder dgl
EP0021335A1 (fr) Dispositif électromagnétique pour actionner un élément d'impression
DE3502469C2 (fr)
DE19637077A1 (de) Permanentmagnet für den magnetischen Kreis eines vorzugsweise in einem Fehlerstromschutzschalter einsetzbaren Magnetauslösers
DE1474164C3 (de) Vorrichtung zum Lochen von Auf zeichnungstragern
DE3018407A1 (de) Elektromagnetisch betaetigbarer stoesselantrieb, insbesondere fuer anschlagdrucker
EP0012812A1 (fr) Actionneur électro-magnétique à modulation de flux
EP0174381B1 (fr) Banc de marteaux d'impression de construction modulaire
DE3402621A1 (de) Druckkopf fuer einen schlagenden mosaikzeilendrucker
DE1965577C3 (de) Betätigungsanordnung für eine Anzahl von Betätigungsgliedern
EP0108159A1 (fr) Entraînement électromagnétique à mouvement de balancier, en particulier pour imprimantes à percussion
DE2845806C2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19810807

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB IT

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19850213

REF Corresponds to:

Ref document number: 3070166

Country of ref document: DE

Date of ref document: 19850328

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900803

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900828

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19901004

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910925

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920602

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST