EP0432860A2 - Dispositif support pour une tête d'impression matricielle à aiguilles - Google Patents

Dispositif support pour une tête d'impression matricielle à aiguilles Download PDF

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Publication number
EP0432860A2
EP0432860A2 EP90250297A EP90250297A EP0432860A2 EP 0432860 A2 EP0432860 A2 EP 0432860A2 EP 90250297 A EP90250297 A EP 90250297A EP 90250297 A EP90250297 A EP 90250297A EP 0432860 A2 EP0432860 A2 EP 0432860A2
Authority
EP
European Patent Office
Prior art keywords
print head
matrix
carriage
guide housing
needle guide
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.)
Ceased
Application number
EP90250297A
Other languages
German (de)
English (en)
Other versions
EP0432860A3 (en
Inventor
Günter Dipl.-Ing. Gomoll
Wolfgang Dipl.-Ing. Hauslaib
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
Publication of EP0432860A2 publication Critical patent/EP0432860A2/fr
Publication of EP0432860A3 publication Critical patent/EP0432860A3/de
Ceased 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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/10—Sound-deadening devices embodied in machines

Definitions

  • the invention relates to a matrix printer with a matrix printhead, in particular with a matrix needle printhead, which is mounted on a reciprocating carriage guided on a rail guide, the printing elements being operable with a higher frequency than 1000 Hz and against one another on a ribbon Pressure abutments on record carriers are movable.
  • the matrix print head of such a matrix printer is mounted or fastened on a slide, the slide being guided on a guide axis which runs parallel to the print abutment and the guide axis having a round cross section and guiding and supporting the slide via a plain bearing.
  • Another axis, which runs parallel to the guide axis, is arranged facing away from the pressure abutment.
  • the guide axis and axis are made of metal and are mounted in the printer side walls and determine the possible path of the slide due to their length.
  • the print elements contained in the print head generate vibrations during the printing process due to the needle firing frequency and other frequencies or through the special type of text or graphics. These vibrations stimulate resonance frequencies in the guide axis, in the side parts and in the housing across the printhead and through the carriage. These vibrations are emitted as airborne noise and form part of the noise emitted by the printer.
  • the prior art includes a soundproofed and at the same time soundproofed pressure abutment (DE-35 38 762).
  • the sound absorption consists of a metallic pressure beam, a vibration-reducing damping layer and a metallic intermediate layer.
  • the sound insulation is formed by an insulating layer that decouples frequencies.
  • the insulation layer is formed here from a resilient plastic layer, consisting of a plastic from the polymer group.
  • the present invention is therefore based on the object of also counteracting noise generation via the print head, carriage, guide axis and axis on the frame parts of the printer and to a large extent to also achieve structure-borne noise reduction and structure-borne noise insulation.
  • the object is achieved in that a matrix print head which can be fixed in position for the slide is provided with a structure-borne sound-absorbing layer of an elastic material at least on a reference surface between the matrix print head and slide, and in that the matrix print head and the slide in this area are clamped together.
  • the noise formation on the "second path" from the printhead via the slide and the rail guide is counteracted by a reduced structure-borne noise excitation, and on the other hand a reduction in the excitation of the resonance frequency of the downstream components is achieved.
  • the structure-borne noise insulation can be further improved in that the structure-borne noise-insulating layer is located in the area of a pressure needle guide housing of the matrix print head.
  • structure-borne noise damping and structure-borne sound insulation is also achieved in that the structure-borne sound-absorbing layer is part of a one-piece sleeve surrounding the pressure needle guide housing of the matrix print head on at least three sides (bottom, top and side wall).
  • the printhead is clamped to the carriage via the sleeve in such a way that the pressure needle guide housing of the matrix printhead can be clamped on the carriage by means of a spring clip which engages in recesses in the carriage.
  • the sleeve closes the pressure needle guide housing with the flat underside of a matrix printhead provided with positioning projections, that a cross-sectional area of the sleeve seals one of the support webs of the pressure needle guide housing on one side encloses, to which a cuff part, which partially surrounds the U-cross section of the printing needle guide housing and covers the upper side, is connected and that openings are provided for the positioning projections of the matrix print head.
  • the matrix printer has a matrix print head 1 which is mounted on a carriage 2 which can be moved back and forth.
  • the carriage 2 is guided on a rail guide 3.
  • the printing elements 4 can be actuated at a high frequency, such as, for example, above 1000 Hz, and by means of an ink ribbon 5 against one lying on a pressure abutment 6
  • Record carrier 7 movable, whereby characters or graphics composed of pressure points are created.
  • the matrix print head 1 can be fixed in position for the carriage 2.
  • a reference surface 8 between the matrix print head 1 and the carriage 2 is used for this purpose, the reference surface 8 forming a flat surface 8a on the underside 9 of the matrix print head 1.
  • a structure-borne sound-absorbing layer 10 made of an elastic material is arranged between the flat surface 8a on the underside 9 and a flat surface 2a of the slide 2 opposite it, the matrix print head 1 and the slide 2 in this area of the opposite flat surfaces 8a and 2a connected to each other, ie is a bit resilient.
  • the rail guide 3 can be viewed as a whole or divided into a guide axis 11 which is round in cross section and an axis 12 which is rectangular in cross section.
  • the structure-borne sound-absorbing layer 10 is located in the region of an internally hollow pressure needle guide housing 13 of the matrix print head 1.
  • the structure-borne sound-absorbing layer 10 (FIG. 2) is part of a one-piece sleeve 14 surrounding the pressure needle guide housing 13 of the matrix print head 1 on at least three sides, bottom 10a, top 10b and side wall 10c.
  • the sleeve 14 is shown as a whole in FIG. 3 and will be described in more detail below.
  • the pressure needle guide housing 13 of the matrix print head 1 can also be clamped on the slide 2 by means of a spring clip 17 which engages under recesses 15 and 16 of the slide 2.
  • Spring legs 17a and 17b can be pushed in slightly by the operating personnel, so that a spring leg 17a is pulled upwards through an opening 18 the sleeve 14 or the pressure needle guide housing 13 is pivoted and the matrix print head 1 can be removed.
  • the cuff 14 is shown in more detail in FIG. 3. Its flat underside 10a closes the pressure needle guide housing 13, positioning projections 20 being provided on the pressure needle guide housing 13 and penetrating through the openings 21 in the sleeve 14.
  • the reference surface 8 or the flat surface 8a on the underside 9 of the matrix print head 1 is formed by two support webs 22a, 22b.
  • a cross-sectional area 23 of the sleeve 14 encloses one of the support webs (22b) of the pressure needle guide housing 13 (on one side), to which a sleeve part 24, which partially surrounds the U cross section (FIG. 2) of the needle guide housing 13 and covers the upper side 10b, is connected.
  • the cuff 14 can be folded around the cross-sectional areas 23 like a joint.
  • the cuff part 24 also serves through its thickness and shape to balance the elasticity of e.g. rubber cuff.
  • a further shortened side wall part 10d surrounds the pressure needle guide housing 13 accordingly.

Landscapes

  • Character Spaces And Line Spaces In Printers (AREA)
  • Impact Printers (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
EP19900250297 1989-12-13 1990-11-29 Mounting for a matrix wire print head Ceased EP0432860A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3941598A DE3941598C2 (de) 1989-12-13 1989-12-13 Matrixdrucker mit einem Matrixdruckkopf, insbesondere einem Matrixnadeldruckopf, der auf einem hin- und herbewegbaren Schlitten gelagert ist
DE3941598 1989-12-13

Publications (2)

Publication Number Publication Date
EP0432860A2 true EP0432860A2 (fr) 1991-06-19
EP0432860A3 EP0432860A3 (en) 1991-10-30

Family

ID=6395599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900250297 Ceased EP0432860A3 (en) 1989-12-13 1990-11-29 Mounting for a matrix wire print head

Country Status (3)

Country Link
US (1) US5152620A (fr)
EP (1) EP0432860A3 (fr)
DE (1) DE3941598C2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05177869A (ja) * 1991-12-27 1993-07-20 Rohm Co Ltd Ｌｅｄヘッド
JP3324719B2 (ja) * 1995-03-22 2002-09-17 セイコーエプソン株式会社 インクジェットプリンタ
GB2333266B (en) * 1998-01-14 2002-03-13 Tally Computerdrucker Gmbh Printer with Print Head Distance-setting Device

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8009489U1 (de) * 1980-04-05 1980-07-24 Adlerwerke Vorm. Heinrich Kleyer Ag, 6000 Frankfurt Vorrichtung zur geraeuschdaempfung von nadeldruckkoepfen
US4410288A (en) * 1981-12-14 1983-10-18 Holmes Lawrence Jr Vertical replacement daisy wheel element
DE3313205C1 (de) * 1983-04-12 1984-10-04 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur Fuehrung einer Druckwerkes
JPS6018380A (ja) * 1983-07-11 1985-01-30 Koyo Sangyo Kk 衝撃性印字機の防音処理方法
US4514100A (en) * 1983-08-19 1985-04-30 At&T Teletype Corporation Mounting apparatus for dot matrix print head
US4643597A (en) * 1983-12-28 1987-02-17 Tokyo Electric Co., Ltd. Dot printer
JPS60178078A (ja) * 1984-02-27 1985-09-12 Nec Corp プリンタ
JPS59209176A (ja) * 1984-04-27 1984-11-27 Matsushita Electric Ind Co Ltd 印字装置
JPS61217260A (ja) * 1985-03-23 1986-09-26 Canon Inc ワイヤドツトヘツド
JPH0632968B2 (ja) * 1985-03-26 1994-05-02 セイコーエプソン株式会社 印字ヘツド取り付け機構
JPS6273981A (ja) * 1985-09-27 1987-04-04 Canon Inc 記録装置
DE3538762A1 (de) * 1985-10-31 1987-05-14 Mannesmann Ag Drucker, insbes. matrixdrucker der nadelbauart
JPS62122775A (ja) * 1985-11-25 1987-06-04 Matsushita Electric Works Ltd ドツトプリンタ
JPS62212182A (ja) * 1986-03-14 1987-09-18 Nec Corp プリンタキヤリア
US4818133A (en) * 1986-05-16 1989-04-04 Williams Richard A High speed wire matrix print head
JP2535356B2 (ja) * 1987-07-29 1996-09-18 大川精螺工業株式会社 製品の割れ検出装置

Also Published As

Publication number Publication date
EP0432860A3 (en) 1991-10-30
DE3941598C2 (de) 1994-06-30
DE3941598A1 (de) 1991-06-20
US5152620A (en) 1992-10-06

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