EP0081809A2 - Imprimante à aiguilles à construction aisée et sa méthode de fabrication - Google Patents

Imprimante à aiguilles à construction aisée et sa méthode de fabrication Download PDF

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Publication number
EP0081809A2
EP0081809A2 EP82111385A EP82111385A EP0081809A2 EP 0081809 A2 EP0081809 A2 EP 0081809A2 EP 82111385 A EP82111385 A EP 82111385A EP 82111385 A EP82111385 A EP 82111385A EP 0081809 A2 EP0081809 A2 EP 0081809A2
Authority
EP
European Patent Office
Prior art keywords
armature
needle
spring
electromagnets
yoke
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
EP82111385A
Other languages
German (de)
English (en)
Other versions
EP0081809B1 (fr
EP0081809A3 (en
Inventor
Rolf Schäfer
Peter Vogelhuber
Hans Joachim Wysk
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.)
Digital Kienzle Computersysteme GmbH and Co KG
Original Assignee
Kienzle Apparate GmbH
Mannesmann Kienzle 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 Kienzle Apparate GmbH, Mannesmann Kienzle GmbH filed Critical Kienzle Apparate GmbH
Priority to AT82111385T priority Critical patent/ATE15990T1/de
Publication of EP0081809A2 publication Critical patent/EP0081809A2/fr
Publication of EP0081809A3 publication Critical patent/EP0081809A3/de
Application granted granted Critical
Publication of EP0081809B1 publication Critical patent/EP0081809B1/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
    • 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
    • B41J2/28—Actuators for print wires of spring charge type, i.e. with mechanical power under electro-magnetic control
    • 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
    • B41J2/235—Print head assemblies
    • B41J2/25—Print wires
    • B41J2/26—Connection of print wire and actuator

Definitions

  • the invention relates to a dot-matrix printing system which is designed in such a way that it has a structure which is as easy to assemble as possible. It also relates to a method for producing such a dot-matrix printing system.
  • the printing elements on the pressure hammers carrying them - segments of the armature disk - do not have a clear, structurally predetermined position, it is extremely difficult to attach the printing elements to the segments in production in such a way that the tips of the printing elements lie in the desired printing position on the recording medium - in one or two rows vertically one above the other - that, on the other hand, they are also guided in the recesses of the segmented front panel in such a way that even air gaps remain between the pressure elements and the slots in the segmented front panel. If these air gaps are missing, the pressure elements obviously cannot move because the front plate is magnetized and holds it in place.
  • the correct fastening becomes particularly difficult supply of the printing elements on the segmented armature disk, if a certain position of the printing elements is to be achieved relative to the recording medium, that is if the printing elements must all be arranged exactly in one or two rows, which is usually required in dot matrix printers. In this case, it is almost impossible to create a faceplate that is designed so that its tolerances force the pressure elements to be attached to the segments of the anchor plate in the correct position.
  • a further disadvantage of the known arrangement is, in particular, that if one of the pressure elements, which, as is known, is not all actuated equally often, is worn out, so that pressure is no longer applied, the entire anchor plate must be replaced with the pressure elements.
  • the object of the invention is to provide a printing system of this type which can be assembled as cheaply as possible with a basically similar construction.
  • the systems should also be designed so that they can either be combined into a needle print head, in which the needles are arranged in one or more rows one below the other, or can also be arranged in a row to build a line printer.
  • the invention consists of a needle printing system consisting of a base plate made of magnetic material and one or more permanent magnets individually or jointly assigned to the printing needles and electromagnets individually assigned to each printing needle, each with a core, yoke parts for bridging the air gaps between the poles of the permanent magnet (s) and the electromagnet, the permanent magnets pulling an armature with the spring under tension against the core of the non-energized electromagnet and the spring allowing the armature to snap forward with the pressure needle when the electromagnet is excited into the pressure position, and is characterized in that, on the one hand, the pole ends of the first yoke parts, the partially bridge the air gap between the permanent magnets and the electromagnets, and the pole ends of the cores of the electromagnets lie in one plane and that on the other hand the armatures are arranged in a further yoke part and that the pole ends of this further yoke part and the pole end of the armature also lies in one plane in its pretensione
  • the arrangement of the pole ends of a first yoke part and the cores of the electromagnets in one plane has the advantage that no tolerances can occur here.
  • the electromagnet If the electromagnet is not energized, the armature lies flat on the core of the electromagnet when the spring is tensioned, without any tilting of the armature occurring. This will be an optimal one System performance achieved and at the same time clearly defined for the assembly of the geometric location of the various points that are decisive for the determination of the air gaps.
  • the permanent magnetic force is hereby exploited to the maximum, and the service life and functional reliability of the individual dot-matrix printing systems are substantially increased, because the armature always hits the core of the electromagnet in a flat manner.
  • the damping stop for damping the kinetic energy of the spring and the armature in the rest position is also arranged in one plane with the pole ends of the first yoke parts and the cores of the electromagnets, so that no tolerance possibilities arise from the arrangement of the damping stop result and no settings are required.
  • each armature is individually assigned the further yoke part, so that individual systems can be installed separately here.
  • the armature when the spring is tensioned, is ground in the yoke part individually assigned to it so that the underside of the yoke part and the armature likewise form a plane such that when the electromagnet is not energized, the armature is positioned precisely without any tilting on the cores of the electromagnets.
  • This method has the additional advantage that the armature can be mounted in the yoke part assigned to it without the force of the permanent magnet having a disadvantageous effect here.
  • Each system has a base plate 1, which consists of a magnetically conductive material.
  • An electromagnetic core 2 is fastened in this base plate 1.
  • a permanent magnet 3 is arranged, which can be individually assigned to each magnet system, but which, as shown in FIG. Figure 3 shows which can take the form of a ring 30 which is axially magnetized.
  • a first yoke part 4 serves to partially close a magnetic circuit between the core 2 of the electromagnet 5, 6, the base plate 1, the permanent magnet 3 and this yoke part 4.
  • a coil carrier 5 is also fastened, on which the electromagnetic coil 6 is wound.
  • a tubular part 7 is arranged on the coil carrier 5 for carrying out the ends of the winding.
  • the further yoke part 8 can be seen in particular from FIG. It has two recesses 10 for its spatial definition on the first yoke part 4 and has two projecting pole ends 11, which surround an armature 12 on both sides, so that a uniform air gap 13 results between the armature 12 and the two pole ends 11 of the yoke part 8.
  • the armature 12 is made of a particularly easily magnetizable material - Vacoflux - as a square part with a round bore.
  • the spring 14 is made of round steel and its end 15 is inserted into a corresponding recess in the second pole part 8.
  • a pinch 16 of the spring 14 ensures that the spring 14 can bend.
  • the pinch also serves to ensure that the armature 12 with the spring 14 in the direction of the two pole ends 11 in the yoke part 8 has the necessary transverse stability so that the armature 12 does not touch these pole ends 11.
  • a further pinch 17 is attached to the spring 14, which runs perpendicular to the pinch 16 and is used for soldering on the pressure needle 18. In between, a smaller pinch ensures that the anchor is stuck.
  • a damping stop 19 is provided, which is fastened on a post 20 in the base plate 1.
  • Two guide stones 21 and 22 are used to feed the printing needles 18 in a manner converging on the printing base.
  • the drawing also shows that by a certain angling of the spring 14 between the pinch 17 and the armature 12, the pressure needle 18 in the rest position, i.e. that is, in the situation in which the electromagnet 6 is not energized, bears against the damping stop 19. Furthermore, the drawing shows that the armature 12, when the spring 14 is in the relaxed position, extends somewhat obliquely with its pole end. This means that the pole end 23 of the yoke part 8 and the pole end 24 of the armature 12 in the relaxed position of the spring 14 - electromagnet 6 excited - is so beveled that when the armature 12 and the magnetic core 2 are in contact, the armature 12 is not tilted and that the two parts lie snugly on top of each other.
  • the performance of the permanent magnet is best utilized, which on the other hand also leads to an improvement in the performance of the entire system, since precisely defined currents are required for the electromagnet 6 in order to cancel the force of the permanent magnet and to cause the pressure of the pressure needle 18.
  • FIG. 1 and 2 A consideration of FIG. 1 and 2 also shows that the system, consisting of spring 14 and armature 12, is essentially symmetrical in the direction of the axis of the spring, so that there are hardly any tilting moments for the armature.
  • a sensing roller 28 is mounted under the mouthpiece 27 and serves to sense the paper thickness and thus to set the exact printing distance between the front edges of the printing needle 18 and the printing pad.
  • the lower part of the housing is provided with dovetail-shaped ribs 29 with which it can be held in a detent. Ribs 31 and recesses 32 in the housing 39 are intended to ensure the best possible cooling of the system, which heats up over longer working hours.
  • a projection 33 which serves to hold the cage member 4 0, the ring magnet 30 and the base plate 1 by means of recesses 34 in position and to lead.
  • a rubber ring 35 is provided between the housing 39 and the yoke part or the yoke parts 8 of the pressure needle system, which holds the systems elastically.
  • a similar rubber ring 36 is also present under the base plate 1, ie an elastic rubber ring 36 is also present between the base plate 1 and a printed circuit board 37 for leading out the connections 38 of the electromagnets 2, 5, 6.
  • the rubber rings 35, 36 hold the parts in their relative position to one another.

Landscapes

  • Impact Printers (AREA)
  • Sewing Machines And Sewing (AREA)
  • Manufacturing Of Electric Cables (AREA)
EP82111385A 1981-12-12 1982-12-08 Imprimante à aiguilles à construction aisée et sa méthode de fabrication Expired EP0081809B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82111385T ATE15990T1 (de) 1981-12-12 1982-12-08 Nadeldrucksystem mit montageguenstigem aufbau und verfahren zur herstellung desselben.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813149300 DE3149300A1 (de) 1981-12-12 1981-12-12 Nadeldrucksystem mit montageguenstigem aufbau und verfahren zur herstellung desselben
DE3149300 1981-12-12

Publications (3)

Publication Number Publication Date
EP0081809A2 true EP0081809A2 (fr) 1983-06-22
EP0081809A3 EP0081809A3 (en) 1984-04-25
EP0081809B1 EP0081809B1 (fr) 1985-10-09

Family

ID=6148576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82111385A Expired EP0081809B1 (fr) 1981-12-12 1982-12-08 Imprimante à aiguilles à construction aisée et sa méthode de fabrication

Country Status (4)

Country Link
US (1) US4521122A (fr)
EP (1) EP0081809B1 (fr)
AT (1) ATE15990T1 (fr)
DE (2) DE3149300A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146751A1 (fr) * 1983-11-23 1985-07-03 HONEYWELL BULL ITALIA S.p.A. Méthode de fabrication d'un ensemble d'armatures pour tête d'impression mosaique
EP0189792A3 (en) * 1985-01-28 1987-08-26 International Business Machines Corporation Wire matrix printer apparatus

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772141A (en) * 1982-10-27 1988-09-20 Royden C. Sanders, Jr. Dot matrix printhead pin driver and method of assembly
DE3644185C1 (de) * 1986-12-23 1991-05-29 Mannesmann Ag Matrixdruckkopf
US4634301A (en) * 1983-10-20 1987-01-06 Nippon Telecommunication Engineering Company Print head with torsion spring
US4647236A (en) * 1984-12-07 1987-03-03 Citizen Watch Co., Ltd. Print head
US4755068A (en) * 1987-01-30 1988-07-05 Dh Technology, Inc. Dot matrix print head assembly
DE3715304A1 (de) * 1987-05-08 1988-12-01 Protechno Entwicklungsbuero Gm Nadeldruckkopf mit klappankermagneten und ansteuerverfahren dafuer
JPH02215543A (ja) * 1989-02-16 1990-08-28 Seiko Epson Corp インパクトドットヘッド

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3592311A (en) * 1968-10-02 1971-07-13 Ibm Wire printing head
US4044668A (en) * 1975-05-16 1977-08-30 Printronix, Inc. Print hammer mechanism
SE7606042L (sv) * 1975-10-10 1977-04-11 Florida Data Corp Snabbarbetande elektromagnetiskt skrivhuvud
US4230038A (en) * 1977-06-23 1980-10-28 Helmut Falk Matrix print head assembly
US4233894A (en) * 1978-06-02 1980-11-18 Printronix, Inc. Print hammer mechanism having dual pole pieces
US4225250A (en) * 1978-10-10 1980-09-30 Tally Corporation Segmented-ring magnet print head
GB2049557B (en) * 1979-05-11 1983-03-16 Oki Electric Ind Co Ltd Dor printer head
JPS5843037B2 (ja) * 1979-08-15 1983-09-24 日本電信電話株式会社 ワイヤドツト式印字ヘツド
FR2469288B1 (fr) * 1979-11-16 1986-10-10 Impression Enregistre Resultat Tete d'impression matricielle pour imprimante par points
US4389127A (en) * 1979-12-10 1983-06-21 Florida Data Corporation High speed dot matrix impact printer
JPS56135080A (en) * 1980-03-27 1981-10-22 Oki Electric Ind Co Ltd Wire dot head
JPS5715980A (en) * 1980-07-02 1982-01-27 Nec Corp Printing head of printer
JPS5793168A (en) * 1980-12-03 1982-06-10 Nec Corp Wire dot type printer head

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146751A1 (fr) * 1983-11-23 1985-07-03 HONEYWELL BULL ITALIA S.p.A. Méthode de fabrication d'un ensemble d'armatures pour tête d'impression mosaique
US4750259A (en) * 1983-11-23 1988-06-14 Honeywell Bull Italia S.P.A. Method of making armature group for mosaic printing head
EP0189792A3 (en) * 1985-01-28 1987-08-26 International Business Machines Corporation Wire matrix printer apparatus

Also Published As

Publication number Publication date
US4521122A (en) 1985-06-04
DE3266871D1 (en) 1985-11-14
EP0081809B1 (fr) 1985-10-09
EP0081809A3 (en) 1984-04-25
ATE15990T1 (de) 1985-10-15
DE3149300A1 (de) 1983-06-23

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