EP0027894A2 - Electro-aimant à armature battante - Google Patents

Electro-aimant à armature battante Download PDF

Info

Publication number
EP0027894A2
EP0027894A2 EP80105724A EP80105724A EP0027894A2 EP 0027894 A2 EP0027894 A2 EP 0027894A2 EP 80105724 A EP80105724 A EP 80105724A EP 80105724 A EP80105724 A EP 80105724A EP 0027894 A2 EP0027894 A2 EP 0027894A2
Authority
EP
European Patent Office
Prior art keywords
armature
yoke
leg
hinged
mounting part
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
EP80105724A
Other languages
German (de)
English (en)
Other versions
EP0027894A3 (en
EP0027894B1 (fr
Inventor
Hans-Werner Volke
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.)
Siemens Nixdorf Informationssysteme GmbH
Original Assignee
Wincor Nixdorf International GmbH
Nixdorf Computer AG
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 Wincor Nixdorf International GmbH, Nixdorf Computer AG filed Critical Wincor Nixdorf International GmbH
Publication of EP0027894A2 publication Critical patent/EP0027894A2/fr
Publication of EP0027894A3 publication Critical patent/EP0027894A3/de
Application granted granted Critical
Publication of EP0027894B1 publication Critical patent/EP0027894B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/24—Parts rotatable or rockable outside coil
    • H01H50/26—Parts movable about a knife edge
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/27—Actuators for print wires
    • B41J2/275—Actuators for print wires of clapper type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures

Definitions

  • the invention relates to a hinged armature magnet for a mosaic printhead with a hinged armature, which carries a pressure needle at its free end and is pivotally clamped against spring force at one end of the magnet yoke by means of a mounting part, the pivoting path being limited by a stop.
  • Such a hinged armature magnet is known for example from DE-OS 27 17 077.
  • the hinged anchor rests with its clamped end directly on the end face of the leg of the magnetic yoke near the mounting part, a pivot axis of the hinged anchor being determined in that the corner edge of the end face of the yoke leg near the mounting part is chamfered. This creates a tipping edge around which the hinged anchor swings.
  • the invention has for its object to provide a hinged armature of the type mentioned a storage for the hinged armature, which is easy and inexpensive to manufacture and in which the position of the pivot axis of the hinged armature can be maintained exactly.
  • hinged armature abuts near its clamped end and the mounting part together on a substantially cylindrical pin which is arranged with its cylinder axis substantially parallel to the pivot axis of the hinged armature in the region of the corner edge of the magnetic yoke near this pivot axis.
  • a cylindrical pin can be manufactured in a simple manner at low manufacturing costs with high precision, for example from steel. Since both the hinged anchor and the mounting part lie together on the same pin, the length of the lever arm between the point of application of the mounting part and the contact line of the hinged anchor on the pin is precisely defined. This length varies during the pivoting movement of the hinged anchor in a precisely defined manner such that the lever arm between the point of application of the mounting part and the support line of the hinged anchor on the pin and thus also the torque to be overcome by the magnetic force in the open position of the hinged anchor is less than in its closed position, in which it is held by the magnetic force on the magnetic yoke.
  • the mounting part is formed on one leg of a U-shaped spring clip that at least partially encompasses the magnet yoke, the other leg of which carries a guide part for the free end of the hinged armature that includes the stop, the legs of the spring clip opposite the magnet yoke are resiliently movable.
  • other spring means can also be provided which exert the required restoring force on the mounting part.
  • the end face of the yoke leg facing the hinged anchor forms the tangent plane to the pin.
  • the pin is expedient if the pin is arranged in a recess in the yoke leg in such a way that it rests with its surface in each case protrudes slightly beyond the surface of the yoke leg facing the hinged anchor or the mounting part. This ensures that the hinged anchor and the mounting part each have line contact with the pin.
  • the projection of the pin surface over the end face of the yoke leg facing the hinged anchor should be so small that the hinged anchor lies essentially flat on the end face of the yoke leg in its tightened position.
  • the pin expediently has on its surface a recess intended for engagement with the recess in the yoke leg, the axial extent of which is substantially equal to the width of the yoke leg measured in the axial direction.
  • the assembly of the pin on the magnetic yoke is considerably simplified if the assembly part is prestressed in the direction of the yoke leg adjacent to it. As a result, the mounting part rests against the pin surface under spring preload and holds the pin in the recess in the yoke leg.
  • the assembly part is arranged on a U-leg of a U-shaped spring clip, the previously required guidance of the U-leg of the spring clip in grooves which were formed parallel to the longitudinal direction of the yoke leg adjacent to the U-leg is also eliminated.
  • the hinged armature magnet shown in FIGS. 1 to 3 and generally designated 10 essentially comprises a U-shaped magnet yoke 12 made of sintered metal with two yoke legs 14 and 16, of which the yoke leg designated 16 has a magnet coil 18 with leads 20, 22 carries, a sintered metal folding anchor 24, which carries a pressure needle 26 at a free end, a U-shaped spring yoke 28 enclosing the magnetic yoke 12 and finally a spring 32 fastened to a free resilient first U-leg 30 of the spring yoke 28 by means of a screw 32 , made of shock-absorbing plastic guide part 34.
  • the screw 32 engages through an elongated hole 36 formed in the guide part and into a threaded bore 38 of the first U-leg 30 of the spring clip 28. Because of the elongated hole 36, the guide part 34 can be parallel to the first U-leg 30 moved and locked in its respective position by means of the screw 32.
  • the guide part 34 has an opening 40 in its upper part, through which the hinged anchor 24 projects with its free end, one in the upper part of the through Refraction inserted stop piece 42, which is also made of plastic and is glued to the guide member 34, for example, serves as a stroke limitation of the hinged armature 24.
  • the first U-leg 30 of the spring clip 28 is fork-shaped at its free end (cf. FIGS. 1 and 3), the hinged anchor 24 reaching through between the fork ends 44.
  • the guide part 34 ensures by its elastically resilient mounting of the spring clip 28 is a very good rebound damping for the hinged armature 24 and allows Einstel- lun g of the stroke of the hinged armature 24th
  • the spring clip 28 has a longitudinal slot 50 (FIG. 2) in the area of its U-cross leg and in each case in an adjacent part of the first U-leg 30 and the second U-leg 48 narrow web 52 (Fig. 1) is interrupted.
  • the magnetic yoke 12 has on its side remote from the hinged armature 24 a step 54, in which the web 52 engages in such a way that its outer surface is flush with the outer surface of the magnetic yoke 12.
  • the magnetic yoke 12 engages in the slot 50 in the manner shown in FIG. 1.
  • the spring clip 28 is held on the magnetic yoke 12 by a nut 56 which is screwed onto a threaded pin 58 which is formed in one piece with the magnetic yoke 12 and extends in the opposite direction to the central yoke leg 16. With the lower end of this threaded pin 58, the entire hinged armature magnet 10 can be inserted into a bore 60 of a print head carrier 62 and locked by means of a nut 64.
  • the bore 60 points a section 66 closer to the hinged armature magnet 10, in which a compression spring 68 is arranged, which is supported on the one hand on a shoulder 70 of the bore 60, 66 and on the other hand on the nut 55 or the underside of the hinged armature magnet 10.
  • the hinged armature magnet 10 is adjustable in height relative to the pressure head carrier 62.
  • the hinged armature magnet 10, 10 is secured against lateral rotation relative to the printhead carrier S2 by lateral stops 72 on the surface of the printhead carrier 62.
  • the second U-leg 48 of the spring clip 28 has an opening 74 near its free end, through which the hinged anchor 24 engages with its end remote from the pressure needle 26.
  • a bearing tongue 76 of the U-leg 48 which engages in a recess 78 on the hinged armature 24 with spring tension and thus presses the end of the hinged armature 24 against a cylindrical bearing pin 80, which in a stepped recess 82 on the U - Leg 48 zugewanaten upper corner edge of the yoke leg 14 is inserted.
  • the bearing pin 80 has a recess or notch 84 (FIG. 1), the axial dimension of which is equal to the thickness of the magnetic yoke 12, so that the bearing pin 30 is axially immovably attached to the magnetic yoke 12.
  • the bearing pin 80 protrudes slightly with its surface over the surface of the magnetic yoke 12 facing the U-leg 48 of the spring clip 28 and over the end face of the yoke leg 14 facing the hinged armature 24, so that a line contact between the bearing pin 80 and the U-leg 48 or the hinged anchor 24 is ensured.
  • the projection of the bearing pin 80 over that facing the hinged anchor 24 The end face is so small that the air gap between the end face of the yoke leg 14 and the hinged armature 24 is negligible for the magnetic flux.
  • the U-Schenkei 48 is biased towards the magnet yoke 12 so that it bears against the bearing pin 80 under this bias.
  • the hinged anchor 24 rolls on the surface of the pivot pin 80, the distance between the line of contact of the hinged anchor 24 with the surface of the pivot pin 80 and the abutment formed by the bearing tongue 76 being precisely defined in each position of the hinged anchor 24 .
  • the restoring moment with which the spring clip 28 acts on the hinged anchor 24 and which must be overcome by the magnet for pivoting the hinged anchor 24 is precisely defined in each position of the hinged anchor 24.
  • the restoring element is smaller in the open position of the hinged armature 24 because of the then shorter lever arm than in the closed position of the hinged armature 24.
  • bearing pins 80 can be manufactured very precisely in a simple and inexpensive manner, folding armature magnets can now be produced with little effort, in which the previously usual manufacturing accuracies in the region of the bearing point of the folding armature 24 become practically negligible.
  • FIG. 1 when the magnetic coil 18 is energized, a magnetic force flow is generated in the magnetic yoke 12, which closes via the hinged armature 24.
  • the folding anchor 24 is thereby ge from the position shown in FIG. 1 against the magnetic yoke 12 pulled.
  • the spring clip 28 is stressed by the tilting of the hinged armature 24 around the bearing pin 80, which is counteracted by a spring force which results in particular from the curved sections of the spring clip 28 which delimit the slot 50 and are shown in FIGS. 1 and 2, which according to Fig. 2 have a distance from the magnetic yoke 12 and thus can perform a spring movement with respect to the lower horizontal part of the spring clip 28.
  • the spring clip 28 is thereby shifted slightly laterally on the magnetic yoke 12 in its longitudinal direction.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Impact Printers (AREA)
  • Electromagnets (AREA)
EP80105724A 1979-10-26 1980-09-24 Electro-aimant à armature battante Expired EP0027894B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2943440 1979-10-26
DE2943440A DE2943440C2 (de) 1979-10-26 1979-10-26 Klappankermagnet

Publications (3)

Publication Number Publication Date
EP0027894A2 true EP0027894A2 (fr) 1981-05-06
EP0027894A3 EP0027894A3 (en) 1981-11-25
EP0027894B1 EP0027894B1 (fr) 1984-05-09

Family

ID=6084509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105724A Expired EP0027894B1 (fr) 1979-10-26 1980-09-24 Electro-aimant à armature battante

Country Status (3)

Country Link
US (1) US4338585A (fr)
EP (1) EP0027894B1 (fr)
DE (1) DE2943440C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2510810A1 (fr) * 1981-07-31 1983-02-04 Bernier Raymond Organe mecanique de maintien en contact, sur l'arete d'un couteau, d'une piece mobile oscillant librement autour de ladite arete, en vue de la commande d'un contact electrique et son application a la construction de relais ou interrupteurs
EP0188672A1 (fr) * 1985-01-25 1986-07-30 MANNESMANN Aktiengesellschaft Tête d'impression en matrice
EP0251034A1 (fr) * 1986-06-23 1988-01-07 Siemens Aktiengesellschaft Relais électromagnétique
EP0166266A3 (en) * 1984-06-13 1988-03-23 Brown, Boveri & Cie Aktiengesellschaft Pivot for a clapper-type armature

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4515251A (en) * 1983-01-26 1985-05-07 Warner Electric Brake & Clutch Company Electromagnetic brake with improved armature mounting
US4585361A (en) * 1984-02-16 1986-04-29 Dataproducts, Inc. Actuator for dot matrix printhead
US4670727A (en) * 1985-07-18 1987-06-02 Siemens Aktiengesellschaft Electromagnetic relay
EP0214469B1 (fr) * 1985-08-09 1990-11-28 Siemens Aktiengesellschaft Relais électromagnétique
US5002412A (en) * 1986-10-08 1991-03-26 Alps Electric Co., Ltd. Armature guide for wire dot print head
JPH0611789Y2 (ja) * 1987-04-20 1994-03-30 アルプス電気株式会社 ワイヤドツトプリンタ用ヘツド
DE19814399C1 (de) * 1998-03-31 1999-10-21 Moeller Gmbh Elektromagnetisches Schaltgerät
DE10009168A1 (de) * 2000-02-26 2001-09-13 Bosch Gmbh Robert Messvorrichtung und Verfahren zur Erfassung einer Kraft

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2056364A1 (de) * 1970-11-17 1972-05-18 Wilhelm Harting Werk F Elektro Elektromagnetsystem für Mosaik-Druckwerke
FR2154202A5 (fr) * 1971-09-24 1973-05-04 Philips Nv
FR2276679A1 (fr) * 1974-06-24 1976-01-23 Felten & Guilleaume Schaltanl Ensemble magnetique pour relais a induit basculant
US3991869A (en) * 1975-12-15 1976-11-16 General Electric Company Print head improvement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1048317B (fr) * 1959-01-08
US995255A (en) * 1908-08-01 1911-06-13 Kellogg Switchboard & Supply Electromagnet.
NL183132B (nl) * 1954-01-25 Greiner Kg Stapelbare sluithuls, alsmede combinatie van een magazijn gevuld met dergelijke sluithulzen.
DE2717077C3 (de) * 1977-04-18 1980-10-23 Nixdorf Computer Ag, 4790 Paderborn Halterung für einen Klappankermagneten eines Mosaikdruckkopfes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2056364A1 (de) * 1970-11-17 1972-05-18 Wilhelm Harting Werk F Elektro Elektromagnetsystem für Mosaik-Druckwerke
FR2154202A5 (fr) * 1971-09-24 1973-05-04 Philips Nv
FR2276679A1 (fr) * 1974-06-24 1976-01-23 Felten & Guilleaume Schaltanl Ensemble magnetique pour relais a induit basculant
US3991869A (en) * 1975-12-15 1976-11-16 General Electric Company Print head improvement

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2510810A1 (fr) * 1981-07-31 1983-02-04 Bernier Raymond Organe mecanique de maintien en contact, sur l'arete d'un couteau, d'une piece mobile oscillant librement autour de ladite arete, en vue de la commande d'un contact electrique et son application a la construction de relais ou interrupteurs
EP0166266A3 (en) * 1984-06-13 1988-03-23 Brown, Boveri & Cie Aktiengesellschaft Pivot for a clapper-type armature
EP0188672A1 (fr) * 1985-01-25 1986-07-30 MANNESMANN Aktiengesellschaft Tête d'impression en matrice
EP0251034A1 (fr) * 1986-06-23 1988-01-07 Siemens Aktiengesellschaft Relais électromagnétique
US4818965A (en) * 1986-06-23 1989-04-04 Siemens Aktiengesellschaft Electromagnetic relay

Also Published As

Publication number Publication date
EP0027894A3 (en) 1981-11-25
EP0027894B1 (fr) 1984-05-09
DE2943440A1 (de) 1981-05-07
US4338585A (en) 1982-07-06
DE2943440C2 (de) 1984-09-06

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