EP0157727A2 - Tête d'impression matricielle - Google Patents

Tête d'impression matricielle Download PDF

Info

Publication number
EP0157727A2
EP0157727A2 EP85730036A EP85730036A EP0157727A2 EP 0157727 A2 EP0157727 A2 EP 0157727A2 EP 85730036 A EP85730036 A EP 85730036A EP 85730036 A EP85730036 A EP 85730036A EP 0157727 A2 EP0157727 A2 EP 0157727A2
Authority
EP
European Patent Office
Prior art keywords
printing
print head
matrix
base plate
housing
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
EP85730036A
Other languages
German (de)
English (en)
Other versions
EP0157727B1 (fr
EP0157727A3 (en
Inventor
Bernd Dipl.-Ing. Gugel
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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT85730036T priority Critical patent/ATE56182T1/de
Publication of EP0157727A2 publication Critical patent/EP0157727A2/fr
Publication of EP0157727A3 publication Critical patent/EP0157727A3/de
Application granted granted Critical
Publication of EP0157727B1 publication Critical patent/EP0157727B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/377—Cooling or ventilating arrangements

Definitions

  • the invention relates to a matrix printhead with printing needles which can be driven for printing by punctiform formation of characters on a recording medium by means of an electromagnetic solenoid associated with each printing needle with an anchor for printing, the printing needles being mounted and guided in a part of the front and the anchors in the rear part Part of the housing and wherein the electromagnetic coils are combined to form a magnetic block on a base plate and the base plate is connected to the housing.
  • Matrix print heads of this type produce, in matrix printers, back and forth movements in front of the parallel printing abutment (platen roller) via an ink ribbon on the recording medium, printing points which result in alphanumeric characters when the recording medium is fed continuously or step by step.
  • the frequency when the individual printing needles are fired is of crucial importance for the printing speed.
  • the structure of the print needle drive assembly is of essential importance.
  • Matrix printheads with printing needles are known, the construction of which is relatively complicated, so that manufacturing inaccuracies occur in several places, which, when added up, represent considerable storage errors for printing needles, magnet armatures and other moving parts. For this reason, such matrix print heads operate relatively imprecisely and are subject to great wear, which is also determined in part by heating, so that the service life of such matrix print heads is limited.
  • the invention is therefore based on the object of proposing a matrix printhead for matrix printers which initially allows economic tolerances in terms of the accuracy of the manufacture of the individual parts or the individual assemblies, which also has functional stability, ie a long service life, and which is ultimately economical is mountable.
  • the stated object is achieved according to the invention in the matrix print head described at the outset in that the base plate of the magnetic block together with the magnetic yokes consists of a one-piece coil holder which receives the electromagnetic coils and that the coil holder is connected to a core bushing which has a stop disk for the magnet armature and which is connected to one Heatsink is further developed with cooling fins.
  • This invention has the advantages of economical production with economical manufacturing tolerance, furthermore the advantage of a reduced assembly time and the matrix print head according to the invention achieves a stability during operation which could not previously be achieved, so that a long service life is achieved.
  • the stability of the magnetic block and the low-wear power transmission from the electromagnetic coils to the pressure wires is achieved according to further features of the invention in that the base plate of the magnetic block has a base-forming ring to which the magnet yokes are integrally formed and made of the same material in the investment casting process or in the sintering process are.
  • the cost-effectiveness of manufacturing an assembly previously composed of several individual parts with appropriate dimensional accuracy, corresponding tolerance quality and corresponding durability is further achieved in that the one-piece coil carrier consists of an iron-silicon alloy.
  • a separate invention which however can also be used in connection with the previous invention, is a matrix print head with damping stop means for the backward movement of the magnet armature. It is advantageous here that a stop disk covers an end face of the core bushing which is made of plastic and is heat-insulating.
  • the print head guide assembly 1 of the matrix print head is opposite the print abutment 2, which consists of the platen roller 2a.
  • the record carrier 3, usually a paper web 3a, is transported through the platen roller 2a.
  • the ribbon 4 is also located in front of the recording medium 3.
  • the print needle guide assembly 1 has a housing 5 a as part of the print head housing 5.
  • the housing 5a there are guides 6 and 7 for the printing needles 8.
  • the column of the printing needles 8, i.e. several, e.g. five to twelve, superimposed printing needles 8 are also guided in the guide mouthpiece 9 very close to the pressure abutment 2.
  • the guide mouthpiece 9 is also fastened to the guide carrier 10 and adjustable in two height positions by means of the stop 11, the spring 12, the electromagnet 13 and the adjustable working air gap 14.
  • the height adjustment is not part of the present invention.
  • the pressure needles 8 can therefore also be guided in a height-adjustable manner in the guide mouthpiece 9.
  • the pressure needle drive assembly 15 has a connection housing 5b which is kept at a distance from the housing 5a by means of shims 16 which allows the position of the pressure needles 8 on the guide mouthpiece 9 to be readjusted or readjusted at any time during the life of the matrix print head.
  • the pressure needles 8 are supported in a rear pressure needle bearing 17 and their needle head 8a abuts against a bearing surface 17a via the compression spring 8b.
  • a magnet armature 13 which bears against the needle head 8a, is also supported on a conventional plastic ring 19 and can be actuated by means of the electromagnet 20.
  • the electromagnetic coils 21 and the magnetic yokes 22a and 22b with further features are combined to form a magnetic block 23 and shown separately in FIG. 2 '. 2, the magnetic block 23 is drawn without the winding 21.
  • the magnet block 23 has a base plate 24, which forms a ring 24a, on which the magnet yokes 22a and 22b are integrally formed, so that the base plate 24 (ring 24a) together with the magnet yokes 22a and 22b form a one-piece coil carrier 25 .
  • the base plate 24 is connected to a core bushing 27 by a press connection 26.
  • the core bushing 27 forms a transition to a receiving collar 27b through ribs 27 1 .
  • the core bushing 27 is machined on the end face 28 or on the face 29, if machining has not already become unnecessary due to the manufacturing process (investment casting process, sintering process). A precise distance 30 arises during machining, the tolerance quality being simple and economical to maintain.
  • the stop disc 31 which consists of a tough and wear-resistant plastic or the like.
  • the core bushing 27 is simultaneously configured to form a heat sink 32 with cooling fins 33.
  • the stop disc 31 forms a centering projection 31a, a stop surface 31b, which is of course at a tolerance distance from the surface 29.
  • the stop disk 31 also forms a recess 31c between two ribs 27a, through which connecting cables 34a and 34b run to the electromagnetic coils 21 (FIG. 3).
  • FIG. 1 Another design of a stop disk 35, which, however, fulfills the same functions and properties of the stop disk 31, is shown in FIG. 1, the only modification being the laying of the recesses 31c: there are other recesses 36 through the ring 24a and through the receiving collar 27b intended. However, both the recess 31c and the recess 36 lie within the largest diameter of the matrix print head.

Landscapes

  • Impact Printers (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Magnetic Heads (AREA)
EP85730036A 1984-04-03 1985-03-05 Tête d'impression matricielle Expired - Lifetime EP0157727B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85730036T ATE56182T1 (de) 1984-04-03 1985-03-05 Matrixdruckkopf.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3412855 1984-04-03
DE19843412855 DE3412855A1 (de) 1984-04-03 1984-04-03 Matrixdruckkopf

Publications (3)

Publication Number Publication Date
EP0157727A2 true EP0157727A2 (fr) 1985-10-09
EP0157727A3 EP0157727A3 (en) 1986-12-30
EP0157727B1 EP0157727B1 (fr) 1990-09-05

Family

ID=6232783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85730036A Expired - Lifetime EP0157727B1 (fr) 1984-04-03 1985-03-05 Tête d'impression matricielle

Country Status (4)

Country Link
EP (1) EP0157727B1 (fr)
JP (1) JPS60225764A (fr)
AT (1) ATE56182T1 (fr)
DE (2) DE3412855A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1090099C (zh) * 1997-04-18 2002-09-04 潘尼尼股份公司 一种打印头

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3540761A1 (de) * 1985-11-16 1987-05-21 Mannesmann Ag Matrixdruckkopf
DE3889662D1 (de) * 1988-12-01 1994-06-23 Mannesmann Ag Matrixnadeldruckkopf der Klappankerbauart.
US5163759A (en) * 1990-10-10 1992-11-17 Brady Usa, Inc. Signmaking machine using character forming tool for overlapping impacts and web scoring
CN102744975B (zh) * 2011-04-22 2014-12-03 多美科信息科技（深圳）有限公司 打印头
CN104553346A (zh) * 2013-10-21 2015-04-29 大连中盈科技有限公司 可连续打印的针式打印机打印头

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230038A (en) * 1977-06-23 1980-10-28 Helmut Falk Matrix print head assembly
DE2800218C2 (de) * 1978-01-04 1980-02-07 Triumph Werke Nuernberg Ag, 8500 Nuernberg Nadeldruckkopf
US4230412A (en) * 1978-03-17 1980-10-28 Helmut Falk Matrix print head assembly
JPS6212613Y2 (fr) * 1980-08-11 1987-04-01
JPS5734979A (en) * 1980-08-11 1982-02-25 Brother Ind Ltd Type head for dot printer
DE3164230D1 (en) * 1980-12-05 1984-07-19 Tokyo Electric Co Ltd Printing head of dot printer
JPS57201669A (en) * 1981-06-04 1982-12-10 Tokyo Electric Co Ltd Printing head for dot printer
JPS5818373U (ja) * 1981-07-24 1983-02-04 日本電気株式会社 電子機器装置
JPS58117935U (ja) * 1982-02-05 1983-08-11 東芝テック株式会社 ドツトプリンタの印字ヘツド
JPS58145737U (ja) * 1982-03-26 1983-09-30 東芝テック株式会社 ドツトプリンタの印字ヘツド
JPS58177373A (ja) * 1982-04-12 1983-10-18 Hitachi Ltd 印字ヘツド
DE3243475C2 (de) * 1982-11-22 1987-02-26 Mannesmann AG, 4000 Düsseldorf Nadeldruckkopf für Matrixdrucker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1090099C (zh) * 1997-04-18 2002-09-04 潘尼尼股份公司 一种打印头

Also Published As

Publication number Publication date
DE3412855C2 (fr) 1991-06-13
ATE56182T1 (de) 1990-09-15
DE3412855A1 (de) 1985-10-03
DE3579487D1 (de) 1990-10-11
EP0157727B1 (fr) 1990-09-05
EP0157727A3 (en) 1986-12-30
JPS60225764A (ja) 1985-11-11
JPH0481513B2 (fr) 1992-12-24

Similar Documents

Publication Publication Date Title
DE3133083C2 (fr)
DE2456816C3 (de) Druckkopf für Drahtdrucker
DE3715304C2 (fr)
EP0157727B1 (fr) Tête d'impression matricielle
DE2629267A1 (de) Antriebsvorrichtung fuer einen draht-matrixdrucker
EP0112273B1 (fr) Tête d'impression à aiguilles pour imprimante à matrice de points
DE3400888A1 (de) Druckstiftbetaetigungsvorrichtung fuer punktmatrixdrucker und verfahren zu ihrer herstellung
EP0338176B1 (fr) Tête d'impression pour imprimante matricielle à aiguilles
DE3502472C2 (de) Verfahren zum Herstellen einer Ankerbaugruppe eines Matrixdruckkopfes
DE2445438A1 (de) Elektromagnetisches antriebselement fuer den schreibkopf eines punktmatrixschreibers sowie fuer eine verwendung des antriebselementes geeigneter schreibkopf
EP0098316B1 (fr) Dispositif à cadre oscillant pour les éléments d'impression d'une imprimante matricielle à la ligne
DE3040399C2 (de) Antriebsmodul für einen mehrere Moduln umfassenden Druckkopf eines Nadeldruckers
DE3402621C2 (fr)
EP0150663B1 (fr) Tête d'impression matricielle avec guidage réglable des aiguilles d'impression
EP0188672B1 (fr) Tête d'impression en matrice
DE3305703A1 (de) Druckkopf fuer einen punktdrucker
EP0157725B1 (fr) Tête d'impression matricielle avec guidage réglable des aiguilles d'impression
DE3141816C2 (fr)
DE3435344C2 (fr)
EP0189119A1 (fr) Tête d'impression pour une imprimante à matrice, notamment pour une imprimante à matrice sérielle
DE3531885A1 (de) Druckwerkskopf fuer einen punkt-linien-drucker
DE3243476C2 (de) Nadeldruckkopf für Matrixdrucker
EP0163592B1 (fr) Tête d'impression matricielle avec guidage réglable des aiguilles d'impression
EP0272999A1 (fr) Tête d'impression à matrice
EP0408158A2 (fr) Tête d'impression par matrice de points

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): AT BE CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19850907

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI NL

17Q First examination report despatched

Effective date: 19880411

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL

REF Corresponds to:

Ref document number: 56182

Country of ref document: AT

Date of ref document: 19900915

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3579487

Country of ref document: DE

Date of ref document: 19901011

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910219

Year of fee payment: 7

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

Ref country code: AT

Payment date: 19910226

Year of fee payment: 7

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

Ref country code: BE

Effective date: 19910331

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
BERE Be: lapsed

Owner name: MANNESMANN A.G.

Effective date: 19910331

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

Ref country code: NL

Effective date: 19911001

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19920305

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

Ref country code: LI

Effective date: 19920331

Ref country code: CH

Effective date: 19920331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950213

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: 19950217

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: 19960305

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960305

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

Ref country code: FR

Effective date: 19961129

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: DE

Payment date: 19980415

Year of fee payment: 14

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

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000101