EP0150663A2 - Tête d'impression matricielle avec guidage réglable des aiguilles d'impression - Google Patents

Tête d'impression matricielle avec guidage réglable des aiguilles d'impression Download PDF

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Publication number
EP0150663A2
EP0150663A2 EP84730139A EP84730139A EP0150663A2 EP 0150663 A2 EP0150663 A2 EP 0150663A2 EP 84730139 A EP84730139 A EP 84730139A EP 84730139 A EP84730139 A EP 84730139A EP 0150663 A2 EP0150663 A2 EP 0150663A2
Authority
EP
European Patent Office
Prior art keywords
pressure
needle
print head
matrix
head according
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
EP84730139A
Other languages
German (de)
English (en)
Other versions
EP0150663A3 (en
EP0150663B1 (fr
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6226705&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0150663(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT84730139T priority Critical patent/ATE73394T1/de
Publication of EP0150663A2 publication Critical patent/EP0150663A2/fr
Publication of EP0150663A3 publication Critical patent/EP0150663A3/de
Application granted granted Critical
Publication of EP0150663B1 publication Critical patent/EP0150663B1/fr
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 the side facing away from the pressure abutment and a pressure needle adjustment assembly facing the pressure abutment, which has a pressure needle adjustment drive.
  • Such matrix print heads with adjustable print needle guidance are used for writing quick and / or fine writing, whereby the quick writing with unchanged position of the printing needle guidance is written in successive lines from left to right or right to left, while the 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 is e.g. from seven to nine needles and can therefore be single column. It is of course possible, provided that the constructively available space in the matrix print head opens up such a construction, also to provide a plurality of adjacent needle gaps, each with seven to nine printing needles arranged one above the other.
  • Such a matrix print head with adjustable print needle guide is known (DE-OS 26 32 293), the print head having print wires arranged equidistantly in two columns and the print wire columns being displaceable in the vertical direction with respect to one another. It is known that the pressure wires of the columns are each arranged on a carrier element, one of which is arranged vertically displaceably on the print head carriage and the other leaf spring-held at the upper end via an electromagnetically or manually operated cam.
  • a particular disadvantage of the known solution is, however, that for one, two or more print needle guides, the matrix print head in the area of the print abutment, i.e. at the point where the characters are written, has an extremely wide design, so that the viewing of the writing printhead is unfavorable, the matrix printhead becomes relatively heavy and certain constructional difficulties for the simultaneous arrangement of the nine or eighteen printing needles in connection leads to difficulties with the pressure needle adjustment assembly.
  • the invention has for its object to provide a matrix printhead in which on the one hand an adaptation of the printing needle adjustment assembly to the existing printing needles or their guides takes place and on the other hand the matrix printhead with regard to the needle stroke, i.e. of the feed of each individual printing needle and with regard to the stroke height when adjusting the printing needle guide can be adjusted extremely precisely, so that the desired fine writing quality is also achieved.
  • the stated object is achieved according to the invention in the matrix printhead mentioned at the outset in that the printing needle drive assembly and the printing needle adjustment assembly are each arranged in a separate housing, that the two housings are detachably connected to one another and that the printing needle adjustment drive runs approximately in the direction of the printing needles in the housing of the printing needle adjustment assembly is arranged.
  • This adjusts the adjustment drive for the adjustment stroke of the printing needle guide to the housing shape of the matrix print head, so that there are no constructional difficulties with the normal course of the long printing needles, and on the other hand it is advantageous that when the housing for the printing needle drive assembly and the printing needle adjustment assembly is separated, a length adjustment of the individual printing needles is made can take place when there is a corresponding wear on the pressure surfaces of the printing needles and such a readjustment is necessary.
  • Such an adjustment of the length of the printing needles which are unevenly worn can, according to an improvement of the invention, e.g. 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 adjustment path of the printing needles or their wear.
  • the printing needle adjustment assembly consists of an armature component extending in the longitudinal direction to the pressure needles, an electromagnet coil extending in parallel, at least one end bearing for the armature component and consists of a locking device for the anchor component, at the front end of the anchor component the pressure needle guide is attached.
  • This armature component which extends in the longitudinal direction, adapts ideally to the course of nine printing needles arranged one above the other or also of a plurality of printing needle gaps, so that the matrix print head only has to be built insignificantly higher than usual.
  • the electromagnetic coil can also be installed in the longitudinal direction and that the required adjustment path for the pressure needle guide results from this basic arrangement for the armature component.
  • the armature component consists of a metal lever which is rotatably supported in the area facing the pressure needle drive assembly.
  • the anchor component can therefore advantageously run through the adjustment path for the pressure needle guide by a slight pitching movement, a considerably large radius being created for this pitching movement, which makes any arch movement of the pressure needle guide negligible.
  • a reliable detection of the pressure needle guide in the respectively selected upper or lower adjustment path position is also achieved in that the anchor component is under the force of one or more springs in the two pressure needle adjustment directions.
  • the anchor component be 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 electromagnetic coil is provided with a metallic magnetic core, which forms the working air gap with the armature component.
  • This design ensures that the working air gap is defined very precisely, which limits losses of the magnetic flux as far as possible, which in turn results in low currents for the application of the electromagnetic coil and thus prevents further heating of the matrix printhead beyond a permissible level.
  • This problem of heating is of particular importance that, as is well known in matrix printheads, further electromagnetic coils are present for each individual printing needle within the printing needle drive assembly and cause a certain, unavoidable heating of the matrix printhead.
  • 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.
  • the working air gap between the magnetic core and the armature component can be adjusted by means of an adjusting screw mounted on the housing of the pressure needle adjusting assembly.
  • the adjustment of the pressure needle guide is also improved for the adjustment path of the pressure needle guide in that the locking 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 inserts 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 in parallel and extends 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 Tête d'impression matricielle avec guidage réglable des aiguilles d'impression Expired - Lifetime EP0150663B1 (fr)

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 true EP0150663A2 (fr) 1985-08-07
EP0150663A3 EP0150663A3 (en) 1986-12-03
EP0150663B1 EP0150663B1 (fr) 1992-03-11

Family

ID=6226705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84730139A Expired - Lifetime EP0150663B1 (fr) 1984-02-01 1984-12-13 Tête d'impression matricielle avec guidage réglable des aiguilles d'impression

Country Status (4)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175763A4 (fr) * 1984-03-22 1987-03-12 Dh Technology Inc Tete d'impression a aiguilles a haute vitesse munie d'un dispositif de decalage de la position d'impression des aiguilles.

Families Citing this family (3)

* 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
EP0314851B1 (fr) * 1987-11-06 1992-02-12 MANNESMANN Aktiengesellschaft Imprimante à matrice d'aiguilles ayant un guidage réglable des aiguilles d'impression
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175763A4 (fr) * 1984-03-22 1987-03-12 Dh Technology Inc Tete d'impression a aiguilles a haute vitesse munie d'un dispositif de decalage de la position d'impression des aiguilles.

Also Published As

Publication number Publication date
DE3403795A1 (de) 1985-08-08
JPS60165256A (ja) 1985-08-28
EP0150663A3 (en) 1986-12-03
DE3485577D1 (de) 1992-04-16
DE3412854C2 (fr) 1987-11-19
DE3412854A1 (de) 1985-10-03
JPH0432744B2 (fr) 1992-06-01
DE3403795C2 (de) 1986-12-18
ATE73394T1 (de) 1992-03-15
EP0150663B1 (fr) 1992-03-11

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