EP0150663B1 - Matrixdruckkopf mit verstellbarer Drucknadelführung - Google Patents

Matrixdruckkopf mit verstellbarer Drucknadelführung Download PDF

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Publication number
EP0150663B1
EP0150663B1 EP84730139A EP84730139A EP0150663B1 EP 0150663 B1 EP0150663 B1 EP 0150663B1 EP 84730139 A EP84730139 A EP 84730139A EP 84730139 A EP84730139 A EP 84730139A EP 0150663 B1 EP0150663 B1 EP 0150663B1
Authority
EP
European Patent Office
Prior art keywords
print
print wire
armature component
adjustment
matrix
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
EP84730139A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0150663A2 (de
EP0150663A3 (en
Inventor
Harald Dipl.-Ing. Niebel
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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
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Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT84730139T priority Critical patent/ATE73394T1/de
Publication of EP0150663A2 publication Critical patent/EP0150663A2/de
Publication of EP0150663A3 publication Critical patent/EP0150663A3/de
Application granted granted Critical
Publication of EP0150663B1 publication Critical patent/EP0150663B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • 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
    • B41J2/255—Arrangement of the print ends of the wires

Definitions

  • the invention relates to a matrix print head with an adjustable pressure needle guide consisting of a pressure needle drive assembly arranged on its side facing away from the pressure needle abutment and a pressure needle adjustment assembly facing the pressure abutment, which has a pressure needle adjustment drive, the pressure needle drive assembly and the pressure needle adjustment assembly being both in a separate housing, the two being in a separate housing are releasably connected to one another, the pressure needle adjusting assembly having an electromagnetic coil with a magnetic core arranged inside its housing, an anchor component, in the housing of the pressure needle adjusting assembly running approximately in the direction of the printing needles, being fastened to pivot about a pivot axis in the direction transverse to the printing needles, wherein the pressure needle guide is attached to the end of the anchor component facing the pressure abutment.
  • Such matrix printheads with adjustable print needle guidance are used for writing quick and / or fine writing, the quick writing with the unchanged position of the printing needle guidance being written in successive lines from left to right or right to left, while fine writing or a relatively quickly written fine writing is carried out by twice overwriting one and the same line is written in opposing pressure passes while adjusting the pressure needle guide.
  • the needle gap consists, for example, of seven to nine needles. It is of course possible, provided that the space available in the matrix print head allows for construction, also to provide a plurality of adjacent needle gaps, each with seven to nine printing needles arranged one above the other.
  • a matrix print head of the type mentioned are known from DE-A-30 41 877.
  • a mouthpiece for printing needles is shown and described there, which is held on an organ transmitting the adjusting drive force, which extends approximately parallel to the printing needles and which forms pole faces which lie opposite the magnetic poles of the electromagnet.
  • the electromagnet is arranged transversely, so that two pole gaps arise and the accommodation of the printing needles and their storage is problematic.
  • the invention is based on the object of designing a matrix needle printhead of the type mentioned at the outset in such a way that an adaptation of the pressure needle adjusting assembly to the existing pressure needles or their guides, i.e. to the available space. Since a matrix needle print head has a slim front housing for the printing needle group, the printing needle adjustment assembly must be adapted to this housing.
  • the armature component runs approximately parallel to the electromagnetic coil, the longitudinal axis of which is arranged approximately parallel to the pressure needles, that a protruding from the interior of the electromagnetic coil, the pressure abutment facing the front end of the magnetic core together with the pivotable armature component a stroke
  • the pressure needle adjustment assembly has a pivot bearing for receiving the end of the adjustment armature facing away from the pressure abutment and for enabling the pivoting movement of the armature component, that the armature component in the two pressure needle adjustment devices is under the force of one or more springs, and that the front one End of the magnetic core part of the swivel path of the anchor component limiting device in both directions.
  • the advantage achieved with the invention is essentially to be seen in the fact that the printing needle adjustment assembly is optimally adapted to the housing shape of the matrix print head, so that no constructional difficulties arise with the usual course of the printing needles and the construction here allows the needle stroke to be as precise as possible To be able to adjust, so that the displacement of the needle column can be carried out in the desired manner in order to achieve fine writing quality.
  • a length adjustment of printing needles which are unevenly worn in their length can, for example, after an improvement of the subject matter of the invention. be carried out in such a way that interchangeable inserts are arranged between the housings of the pressure needle drive assembly and the pressure needle adjustment assembly.
  • Such inserts can e.g. consist of spacer plates of a thickness which corresponds to the readjustment of the printing needles or their wear.
  • the armature component consists of a metal lever which is pivot-mounted in the area facing the pressure needle drive assembly without play, loaded with a spiral spring.
  • the armature component can therefore advantageously run through the adjustment path for the pressure needle guide by means of a slight pitching movement, a considerably large radius being created for this pitching movement, which makes any arch movement of the pressure needle guide negligibly small.
  • the anchor component is acted upon in the area of the pressure needle drive assembly by means of a spiral spring and in the area facing the pressure abutment by means of a compression or tension spring.
  • the electromagnet therefore cancels the corresponding forces of the springs, the spiral spring helping to ensure a precisely defined axis of rotation for the armature component around its rear end bearing.
  • the pitching movements described are also increased in their precision in that the armature component is arranged between lateral guides. These guides ensure a largely low-friction and thus low-wear lateral mounting of the anchor component.
  • the metallic magnetic core is mounted in an insulating material within the electromagnetic coil. This measure supports the formation of a bearing for the magnetic core, specifically in the sense of fixing the magnetic core so that it can practically not move and at the same time the aforementioned leakage losses of the magnetic flux are avoided.
  • the magnetic core of the electromagnetic coil forms the end bearing for the armature component in the area facing the pressure needle drive assembly.
  • This design leads to the desired one Magnetic flux circuit without taking up much space for the structural placement of the parts and without having to accept excessive scattering losses.
  • the working air gap between the front end of the magnetic core and the armature component is adjustable by means of an adjusting screw mounted on the housing of the pressure needle adjusting assembly. This feature is of considerable importance with regard to the precision with which the stroke adjustment of the pressure needle guide between two pressure passes, ie before a respective forward and backward pressure pass, has to be carried out in order to produce the fine print.
  • the adjustment of the pressure needle guide is also improved for the adjustment path of the pressure needle guide in that the stop device for the anchor component consists of a stop limiting the adjustment path for the pressure needle guide and of the means for regulating the working air gap.
  • the housing for the pressure needle adjusting assembly consists of plastic and that the magnetic core of the electromagnetic coil is ultrasonically welded to a housing projection. This measure simplifies the fastening of the metallic magnetic core of the electromagnetic coil and makes special fastening means unnecessary.
  • the matrix print head with adjustable print needle guide lies opposite the platen 1, here designed as a platen roller.
  • the matrix print head according to the invention is divided into the print needle drive assembly 2 and the print needle adjustment assembly 3.
  • the structure of the pressure needle adjustment drive 4 will be described in more detail.
  • the pressure needle drive assembly 2 is enclosed by the housing 5 and essentially accommodates components such as the electromagnetic coil 7, yoke body 8, folding armature 9, stop 10, pressure needle head 11, return spring 12 and rear pressure needle bearing 13 associated with each pressure needle 6.
  • the structure of the print needle drive assembly 2, the task of which is to shoot off the existing print needles 6 in order to print printing dots on the recording medium 14, is not directly part of the present invention.
  • the fastening of the housing 5 to the housing 15 with the addition of the exchangeable inserts 16 is important for the invention 1 wear out and can be adjusted by removing one of the supplements 16, after which the printing needles 6 on the ruby 18 are reground to their appropriate length.
  • the printing needle adjusting drive 4 Located within the housing 15 for the printing needle adjusting assembly 3 is the printing needle adjusting drive 4, which extends approximately parallel and is arranged in the longitudinal direction of the printing needles 6. This arrangement saves considerable space and adapts to the elongated shape of the housing 15.
  • the pressure needle adjustment assembly 3 also has the armature component 19, which also runs in parallel, the parallel-extending electromagnetic coil 20, a final bearing 21 for the armature component 19 and a locking device 22 for the armature component 19, the pressure needle guide 23 being adjustably mounted at the front end 19a.
  • the nine superimposed printing needles 6 are guided at their tip in the ruby 18, which itself is mounted in an enclosure and is connected to the anchor component 19.
  • the armature component 19 consists of a metal lever 24 which is rotatably supported at its end 19b.
  • the metal lever 24 is in one of the two pressure needle guide adjustment directions 25 and 26 under the force of the compression spring 27 and abuts the stop 28.
  • the anchor component lies with an angled section in a recess 29 and is secured in this position by the spiral spring 30.
  • Lateral guides 31 ensure movement in the desired plane.
  • the printing needles 6 are guided in the support planes 32, 33 and 34 in addition to the printing needle guide 23.
  • the insulating coil body 35 and the metallic magnetic core 36 are located inside the electromagnetic coil 20. At the front end 36a of the magnetic core 36, the magnetic core together with the armature component 19 forms the working air gap 37.
  • the angled section 19c of the anchor component 19 provides a favorable point of attack for the spiral spring 30.
  • the magnetic core 36 is located on the housing projection 38 made of plastic and is held by an ultrasonically welded fastening 39.
  • an adjusting screw 40 is arranged on the housing 15 of the pressure needle adjustment assembly 3, with which the working air gap 37 and thus the adjustment path of the pressure needle guide 23 can be set precisely.
  • the coil body 35 is provided with a projection 41, so that the adjusting screw 40, which is connected to the plastic housing 15, does not cause any scattering losses of the magnetic flux within the magnetic circuit (consisting of the magnetic core 36 and the armature component 19).

Landscapes

  • Impact Printers (AREA)
  • Common Mechanisms (AREA)
  • Coating With Molten Metal (AREA)
EP84730139A 1984-02-01 1984-12-13 Matrixdruckkopf mit verstellbarer Drucknadelführung Expired - Lifetime EP0150663B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84730139T ATE73394T1 (de) 1984-02-01 1984-12-13 Matrixdruckkopf mit verstellbarer drucknadelfuehrung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3403795 1984-02-01
DE3403795A DE3403795C2 (de) 1984-02-01 1984-02-01 Matrixnadeldruckkopf mit einem in Spaltenrichtung verstellbaren Mundstück

Publications (3)

Publication Number Publication Date
EP0150663A2 EP0150663A2 (de) 1985-08-07
EP0150663A3 EP0150663A3 (en) 1986-12-03
EP0150663B1 true EP0150663B1 (de) 1992-03-11

Family

ID=6226705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84730139A Expired - Lifetime EP0150663B1 (de) 1984-02-01 1984-12-13 Matrixdruckkopf mit verstellbarer Drucknadelführung

Country Status (4)

Country Link
EP (1) EP0150663B1 (enrdf_load_stackoverflow)
JP (1) JPS60165256A (enrdf_load_stackoverflow)
AT (1) ATE73394T1 (enrdf_load_stackoverflow)
DE (3) DE3403795C2 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403795C2 (de) * 1984-02-01 1986-12-18 Mannesmann AG, 4000 Düsseldorf Matrixnadeldruckkopf mit einem in Spaltenrichtung verstellbaren Mundstück
US4640633A (en) * 1984-03-22 1987-02-03 Dh Technology, Inc. High-speed wire print head with wire print position shift apparatus
ATE72545T1 (de) * 1987-11-06 1992-02-15 Mannesmann Ag Matrixnadeldrucker mit verstellbarer drucknadelfuehrung.
DE4020010A1 (de) * 1990-06-21 1992-01-09 Mannesmann Ag Matrixnadeldruckkopf

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2108006C3 (de) * 1971-02-19 1974-12-12 Walther-Bueromaschinen Gmbh, 7921 Gerstetten Mosaik-Drahtdruckkopf
US4010835A (en) * 1975-08-01 1977-03-08 International Business Machines Corporation Matrix print head
DE2535699C3 (de) * 1975-08-09 1978-12-14 Olympia Werke Ag, 2940 Wilhelmshaven Verfahren und Drucker zur Herstellung von feingerasterten Schriftzeichen auf einem Aufzeichnungsträger
DE2927385C2 (de) * 1979-07-04 1986-01-16 Mannesmann AG, 4000 Düsseldorf Klappanker-Druckkopf für einen Nadeldrucker
JPS5627363A (en) * 1979-08-15 1981-03-17 Canon Inc Wire dot printing head
JPS5662165A (en) * 1979-10-29 1981-05-27 Seikosha Co Ltd Serial dot printer
DE3041877A1 (de) * 1980-11-06 1982-05-13 Mannesmann AG, 4000 Düsseldorf Matrixdrucker und zugehoeriger nadeldruckkopf
JPS57201669A (en) * 1981-06-04 1982-12-10 Tokyo Electric Co Ltd Printing head for dot printer
DE3403795C2 (de) * 1984-02-01 1986-12-18 Mannesmann AG, 4000 Düsseldorf Matrixnadeldruckkopf mit einem in Spaltenrichtung verstellbaren Mundstück

Also Published As

Publication number Publication date
DE3485577D1 (de) 1992-04-16
EP0150663A2 (de) 1985-08-07
ATE73394T1 (de) 1992-03-15
EP0150663A3 (en) 1986-12-03
JPH0432744B2 (enrdf_load_stackoverflow) 1992-06-01
JPS60165256A (ja) 1985-08-28
DE3412854C2 (enrdf_load_stackoverflow) 1987-11-19
DE3403795C2 (de) 1986-12-18
DE3412854A1 (de) 1985-10-03
DE3403795A1 (de) 1985-08-08

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