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EP0164445B1 - Ensemble pour la fixation et la connexion d'éléments moteurs piézoélectriques dans la tête d'enregistrement d'une imprimante à jet d'encre - Google Patents

Ensemble pour la fixation et la connexion d'éléments moteurs piézoélectriques dans la tête d'enregistrement d'une imprimante à jet d'encre Download PDF

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Publication number
EP0164445B1
EP0164445B1 EP84115418A EP84115418A EP0164445B1 EP 0164445 B1 EP0164445 B1 EP 0164445B1 EP 84115418 A EP84115418 A EP 84115418A EP 84115418 A EP84115418 A EP 84115418A EP 0164445 B1 EP0164445 B1 EP 0164445B1
Authority
EP
European Patent Office
Prior art keywords
drive elements
contact
piezoelectric drive
arrangement
fixing
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
Application number
EP84115418A
Other languages
German (de)
English (en)
Other versions
EP0164445A2 (fr
EP0164445A3 (en
Inventor
Wilfried Dipl.-Ing. Kindler
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0164445A2 publication Critical patent/EP0164445A2/fr
Publication of EP0164445A3 publication Critical patent/EP0164445A3/de
Application granted granted Critical
Publication of EP0164445B1 publication Critical patent/EP0164445B1/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
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14201—Structure of print heads with piezoelectric elements
    • B41J2/1429—Structure of print heads with piezoelectric elements of tubular type

Definitions

  • the invention relates to an arrangement for fixing and contacting tubular piezoelectric drive elements according to the preamble of claim 1.
  • writing heads which contain a plurality of writing nozzles in the form of ink channels which take up writing liquid, which in turn are formed by shapes in the writing head (DE-C-25 43 451).
  • piezoelectric drive elements which enclose the ink channels in a cylindrical manner over part of their length and which deform under suitable control, ink is ejected drop by drop.
  • Such a construction allows the write head to be produced by casting the drive elements while simultaneously forming the ink channels.
  • the high demands placed on the formation of the ink channels require a very large manufacturing effort. To reduce this effort, it is known to combine several piezoelectric drive elements into a so-called piezo tube group (DE-A-32 34 408).
  • the known measure provides that the piezo tube group is inserted into a mold and that contact springs are provided for contacting the piezoelectric drive elements, which produce the electrical connection when a housing cap is placed on the piezo tube group.
  • This also applies to another known measure in which the piezo tubes forming a group are applied individually to a printed circuit board by means of resilient holding and contact elements (US Pat. No. 4,430,594).
  • the object of the invention is to provide an arrangement with which the fixing and the contacting of the piezoelectric drive elements is further improved, especially with regard to the production of print heads with a large number of ink channels.
  • An important advantage of the invention is that the manufacture of print heads can be automated and that the piezoelectric drive elements are always fixed in the correct position and can be contacted by the use of contact clips and printed circuit boards.
  • each of the contact clamps 2 is assigned to one another in pairs and serve as receiving and contacting elements for piezoelectric drive elements in the form of piezo tubes.
  • the contact clamps 2 are connected to contact banks 3, 4 provided on both sides of the printed circuit board 1, this connection being carried out in a manner known per se, for example by wave soldering.
  • the contact banks 3, 4 each have a connecting web, which is removed mechanically, for example by trimming, after a soldering process.
  • these outer detachable parts of the contact banks 3 and 4 are shown hatched. The separation of the outer parts means that the contact clips 2 are separated.
  • Each of the contact clamps 2 has a small contact extension 5, via which the contacting connection with the conductor tracks, not shown here, takes place on the printed circuit board 1 and thus with the inner and outer electrodes of each piezo tube used.
  • each of the circuit boards 1 preassembled in this way receives a row of eight piezo tubes 7, the position of which is precisely defined both with respect to one another and with respect to their arrangement in a write head.
  • the preassembled printed circuit boards 1 are then, as shown in FIG. 3, inserted into a corresponding basic printed circuit board 8 which has receiving and holding slots.
  • four printed circuit boards 1 are inserted into the basic printed circuit board 8, that is to say that the exemplary embodiment shows a possibility of constructing a 32-nozzle writing head.
  • the contact clips 2 of the printed circuit boards 1 each hold and contact the piezo tubes 7, with the connection with the inner electrode 9 being connected via the one contact clip and the connection with the outer electrode 10 of each piezo tube 7 being connected via the other contact clip is made.
  • the main circuit board 8 is also provided on one or both sides with a plug connector 11, to whose outward-facing plug connections 12 the feeds for the control lines are connected. After inserting the printed circuit boards 1 and inserting the plug strips 11 into the basic printed circuit board 8, the unit is wave soldered.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Claims (2)

1. Dispositif pour fixer et connecter un grand nombre d'éléments piézoélectriques tubulaires d'entraînement (7) dans la tête d'impression de dispositifs d'enregistrement à encre, dans lequel pour chaque groupe d'éléments piézoélectriques d'entraînement (7), il est prévu une plaquette à circuits imprimés (1) comportant un nombre d'éléments de maintien et de contact destinés à recevoir les éléments piézoélectriques d'entraînement (7), correspondant au nombre des éléments piézoélectriques d'entraînement (7) réunis dans le groupe, caractérisé par le fait que les éléments de maintien et de contact sont réalisés sous la forme de pinces de contact (2), qui reçoivent les éléments piézoélectriques d'entraînement (7), de manière qu'ils puissent s'y encliqueter, que chaque série des pinces de contact (2) est pourvue d'une rangée de contacts (3, 4), dont les barrettes de liaison peuvent être séparées, et qu'il est prévu une plaquette à circuits imprimés de base (8), dans laquelle respectivement plusieurs plaquettes à circuits imprimés (1) équipées d'éléments piézoélectriques d'entraînement (7) peuvent être insérées.
2. Dispositif suivant la revendication 1, caractérisé par le fait que la plaquette à circuits imprimés de base (8) comporte des bornes de raccordement à enfichage (11, 12) et peut être insérée, après avoir été équipée de ses composants, sous la forme d'un groupe complet de tubes piézoélectriques, dans une coque d'enrobage ou de moulage par injection.
EP84115418A 1984-05-16 1984-12-14 Ensemble pour la fixation et la connexion d'éléments moteurs piézoélectriques dans la tête d'enregistrement d'une imprimante à jet d'encre Expired EP0164445B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3418202 1984-05-16
DE3418202 1984-05-16

Publications (3)

Publication Number Publication Date
EP0164445A2 EP0164445A2 (fr) 1985-12-18
EP0164445A3 EP0164445A3 (en) 1986-05-21
EP0164445B1 true EP0164445B1 (fr) 1989-04-26

Family

ID=6236032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84115418A Expired EP0164445B1 (fr) 1984-05-16 1984-12-14 Ensemble pour la fixation et la connexion d'éléments moteurs piézoélectriques dans la tête d'enregistrement d'une imprimante à jet d'encre

Country Status (4)

Country Link
US (1) US4584591A (fr)
EP (1) EP0164445B1 (fr)
JP (1) JPS60259460A (fr)
DE (1) DE3477902D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4698644A (en) * 1986-10-27 1987-10-06 International Business Machines Drop-on-demand ink jet print head

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4158847A (en) * 1975-09-09 1979-06-19 Siemens Aktiengesellschaft Piezoelectric operated printer head for ink-operated mosaic printer units
SE7603784L (sv) * 1975-09-29 1977-03-30 Siemens Ag Anordning for kontaktering av elektriska komponenter for ingjutning i arbetsstycken
DE2740773A1 (de) * 1977-09-09 1979-03-15 Siemens Ag Vorrichtung zum kontaktieren von im schreibkopf von tintenschreibeinrichtungen zu vergiessenden piezowandlern
JPS55150376A (en) * 1979-05-14 1980-11-22 Canon Inc Liquid ejection recording head
US4385304A (en) * 1979-07-09 1983-05-24 Burroughs Corporation Stacked drop generators for pulsed ink jet printing
JPS5677156A (en) * 1979-11-28 1981-06-25 Ricoh Co Ltd Ink jet recorder
DE3019822A1 (de) * 1980-05-23 1981-12-03 Siemens AG, 1000 Berlin und 8000 München Anordnung fuer einen schreibkopf in tintenmosaikschreibeinrichtungen
DE3208679A1 (de) * 1982-03-10 1983-09-22 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum kontaktieren von in kunststoff zu vergiessenden roehrenfoermigen piezowandlern
US4502059A (en) * 1982-08-20 1985-02-26 Xerox Corporation Electrical interconnection system
DE3234408C2 (de) * 1982-09-16 1986-01-09 Siemens AG, 1000 Berlin und 8000 München Schreibkopf mit piezoelektrischen Antriebselementen für Tintenschreibeinrichtungen

Also Published As

Publication number Publication date
EP0164445A2 (fr) 1985-12-18
DE3477902D1 (en) 1989-06-01
US4584591A (en) 1986-04-22
JPS60259460A (ja) 1985-12-21
EP0164445A3 (en) 1986-05-21

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