EP0371183A1 - Wire matrix print head of the clapper type - Google Patents
Wire matrix print head of the clapper type Download PDFInfo
- Publication number
- EP0371183A1 EP0371183A1 EP88730266A EP88730266A EP0371183A1 EP 0371183 A1 EP0371183 A1 EP 0371183A1 EP 88730266 A EP88730266 A EP 88730266A EP 88730266 A EP88730266 A EP 88730266A EP 0371183 A1 EP0371183 A1 EP 0371183A1
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- EP
- European Patent Office
- Prior art keywords
- needle
- closed
- radially inner
- ring
- hinged
- 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.)
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Classifications
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- 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
-
- 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
Definitions
- the invention relates to a matrix needle printhead of the hinged armature type with a plurality of systems, each consisting of a pair of magnetic yoke legs, an electromagnetic coil, a hinged armature and a pressure needle, also with an electromagnetic coil carrier, which is made of sintered or investment casting, and together with a base plate and the magnetic yoke leg pairs, a one-piece component forms.
- Such a matrix needle printhead is e.g. known from DE-A1-34 12 855 or from US-A1-4,230,038.
- the known solutions have pairs of U-shaped magnet yokes.
- the yoke legs are rectangular in cross section.
- Such a design takes up space and space.
- the problem of position and shape errors arises during manufacture, and in the case of sintered parts or investment castings, filling defects occur in the production tool.
- Such filling defects lead to irregularities in the magnetic flux.
- the magnetic flux depends among other things. on the density of the material. Calibration problems of the workpiece also arise. All difficulties are further increased as the number of systems increases. With 18 or 24 systems and more systems (assuming a constant nominal diameter), it is difficult to assign the anchors laterally to the magnet yoke legs or to guide the anchors.
- the object of the invention is to propose such an anchor guide, in which the individual hinged anchors are mounted in an extremely precise manner, in particular for low-number systems (such as nine needles) without loss of magnetic energy.
- the electromagnetic coil carrier radially outside individual magnetic yoke legs has, which are each aligned with a needle application point or needle attachment point, that the radially inner magnetic yokes are formed into a closed, circular or polygonal ring and that the folding anchors are associated with the pivoting movements of the guide means, which interact with receiving means on the closed ring .
- the magnetic flux is guided precisely and optimally by the closed radially inner ring, and the hinged anchors are supported very precisely by the radially inner ring, which can be produced very precisely, because the receiving means can be positioned very precisely on the closed ring.
- this radially inner, closed ring can also be used for precise positioning of the receiving means, in that the radially inner, closed, circular or polygonal ring has recesses as receiving means, into which guide means for the hinged anchors engage.
- the exact positioning of the hinged anchors while observing economically producible tolerances can be further improved by projecting into the recesses of the radially inner closed ring shape-like projections which protrude with a boundary side in pairs of incisions of mutually adjacent hinged anchors and with a section projecting above the hinged anchors Engage recesses in the radially inner closed ring.
- One measure for optimizing the magnetic flux is that the width of the closed, circular or polygonal ring is adapted to the required magnetic flux.
- the hinged anchor type matrix needle printhead (Fig. 1) has e.g. nine, twelve, 18 or 24 needles 1.
- Each pressure needle 1 is assigned a pair of magnetic yoke legs 2, an electromagnetic coil 3 and a hinged armature 4, the electromagnetic coil 3 being plugged onto a radially outer magnetic yoke leg 2a.
- Nine such systems are shown.
- the pressure needles 1 are guided in a pressure needle guide housing 5 by means of individual guide walls 6, the bores 7 of which define the arcuate course from a needle engagement point 8 of a pressure needle head 8a and the folding anchor 4 to a mouthpiece 9, the mouthpiece 9 being at a distance from the pressure abutment, not shown Needle stroke lies with the record carrier lying on the pressure abutment.
- the needle engagement point 8 can also consist of a needle attachment point 8b, at which the hinged anchor 4 is welded to the pressure needle 2. In the mouthpiece 9, all nine printing needles 1 are guided one above the other to form a vertical needle gap and stored.
- the pressure needle guide housing 5 forms in the area of the hinged armature 4 a shell 5a corresponding to the outer diameter (nominal diameter) of the matrix needle print head, which shell is also equipped with special functions or features.
- a guide bush 10 in the center of the shell 5a, which forms an abutment for a compression spring 11, which is assigned to each pressure needle 1. Further features and functions of the shell 5a will be described later.
- a rear housing 12 which accommodates the systems and is made of plastic or aluminum (magnetically non-conductive materials), centers a one-piece electromagnetic coil carrier 13 made of sintered or investment casting.
- the one-piece, very precise and high-quality electromagnetic coil carrier 13 is magnetically insulated by electrically non-conductive fillers 14 within the rear housing 12.
- the housing 12 made of aluminum is also provided with a central, heat-resistant, damped washer 15 on which the radially inner armature arms 4a lie in a basic or rest position.
- the hinged anchors 4 are fixed to the radially inner arm 4a by this damping disc 15 and pivotally supported approximately centrally by an elastic damping ring 16 with a square cross section and by the radially inner magnet yoke leg of the pair of magnet yokes 2.
- the one-piece electromagnetic coil carrier 13 forms the individual magnetic yoke legs 2a radially on the outside and the associated radially inner magnetic yoke legs form a closed ring 17 which is circular or polygonal and shaped according to the number of systems.
- the folding anchors 4 perform pivoting movements in order to give the printing needles 1 a lifting movement. Such stroke movements (forward and return stroke are approximately 0.3 mm) are carried out with a frequency of 2000 to 3000 Hz.
- guide means 18 are required, which interact with receiving means 19 (FIG. 2) on the closed ring 17.
- the receiving means 19 consist of depressions 20, into which protrusions 21 of similar shape protrude as guide means 18 to the depressions 20.
- the projections 21 have a boundary side 21a and a boundary side 21b.
- One of the two boundary sides 21a and 21b protrudes in pairs in cuts 4b, 4c of the hinged anchors 4.
- the projections 21 also protrude beyond the hinged anchors 4 with sections 21c in these cuts 4b, 4c. With these sections 21c, the projections 21 engage in the recesses 20 of the radially inner closed ring 17.
- the projections 21 center both the hinged anchors 4, thus forming guide means 18 which are positioned on their pivoting movements and which cooperate with the receiving means 19 on the closed ring 17.
- the hinged anchors 4 are additionally guided in the region of the radially inner arm 4a by means of cams 22.
- the shell 5a is moved from the inverted position shown in Fig. 3 (for a better view) to the operating position shown in Fig. 4, i.e. placed in the inverted position on the ring 17 in Fig. 2.
- the direction of the course of the printing needles 1 in FIGS. 2 and 3 serves for orientation during this placement process.
- connecting lines 23 are led through the filling compound 14 to a printed circuit board 24.
- the circuit board 24 is protected by a cover 25.
- the pressure needle guide housing 5 or the shell 5a and the rear housing 12 are held together by several screws 26 with nuts 27.
- the width 17a of the ring 17 (FIG. 4) serves as an adjustment measure for the optimization of the magnetic flux in order to work with the most favorable magnetic saturation.
- the entire matrix print head shown in FIG. 1 is placed on a print head carriage by means of a pair of dowel pins 28.
Landscapes
- Impact Printers (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Golf Clubs (AREA)
Abstract
Description
Die Erfindung betrifft einen Matrixnadeldruckkopf der Klappankerbauart mit mehreren Systemen, die jeweils aus einem Magnetjochschenkelpaar, einer Elektromagnetspule, einem Klappanker und einer Drucknadel bestehen, ferner mit einem Elektromagnetspulenträger, der aus Sinter oder Feinguß hergestellt ist und zusammen mit einer Grundplatte und den Magnetjochschenkelpaaren einen einstückigen Bauteil bildet.The invention relates to a matrix needle printhead of the hinged armature type with a plurality of systems, each consisting of a pair of magnetic yoke legs, an electromagnetic coil, a hinged armature and a pressure needle, also with an electromagnetic coil carrier, which is made of sintered or investment casting, and together with a base plate and the magnetic yoke leg pairs, a one-piece component forms.
Ein derartiger Matrixnadeldruckkopf ist z.B. aus der DE-A1-34 12 855 oder aus der US-A1-4,230,038 bekannt. Die bekannten Lösungen weisen U-förmige Magnetjochschenkelpaare auf. Die Jochschenkel sind hierbei im Querschnitt rechteckförmig. Eine solche Gestaltung ist jedoch raum- und flächenbeanspruchend. Bei der Herstellung tritt das problem von Lage- und von Formfehlern auf und bei Sinterteilen bzw. Feingußteilen treten Füllungsmängel in dem Herstellungswerkzeug auf. Derartige Füllungsmängel führen zu Ungleichmäßigkeiten des magnetischen Flusses. Der magnetische Fluß hängt u.a. von der Dichte des Werkstoffes ab. Außerdem entstehen Kalibrierungsprobleme des Werkstückes. Sämtliche Schwierigkeiten werden bei Steigerung der Anzahl der Systeme noch weiter erhöht. So ist es bei 18 oder 24 Systemen und mehr Systemen (gleichbleibender Nenndurchmesser vorausgesetzt) nur noch schwierig möglich, die Anker seitlich den Magnetjochschenkeln zuzuordnen bzw. die Anker zu führen.Such a matrix needle printhead is e.g. known from DE-A1-34 12 855 or from US-A1-4,230,038. The known solutions have pairs of U-shaped magnet yokes. The yoke legs are rectangular in cross section. Such a design, however, takes up space and space. The problem of position and shape errors arises during manufacture, and in the case of sintered parts or investment castings, filling defects occur in the production tool. Such filling defects lead to irregularities in the magnetic flux. The magnetic flux depends among other things. on the density of the material. Calibration problems of the workpiece also arise. All difficulties are further increased as the number of systems increases. With 18 or 24 systems and more systems (assuming a constant nominal diameter), it is difficult to assign the anchors laterally to the magnet yoke legs or to guide the anchors.
Der Erfindung liegt die Aufgabe zugrunde, insbesondere für niedrigzahlige Systeme (wie z.B. neun Nadeln) ohne Einbuße von magnetischer Energie eine solche Ankerführung vorzuschlagen, bei der die einzelnen Klappanker äußerst genau bestimmt gelagert sind.The object of the invention is to propose such an anchor guide, in which the individual hinged anchors are mounted in an extremely precise manner, in particular for low-number systems (such as nine needles) without loss of magnetic energy.
Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Elektromagnetspulenträger radial außen einzelne Magnetjochschenkel aufweist, die jeweils auf eine Nadelangriffsstelle bzw. Nadelbefestigungsstelle ausgerichtet sind, daß die radial inneren Magnetjoche zu einem geschlossenen, kreisrunden oder polygonalen Ring geformt sind und daß den Klappankern jeweils auf deren Schwenkbewegungen abgestellte Führungsmittel, die mit Aufnahmemittel an dem geschlossenen Ring zusammenwirken, zugeordnet sind. Durch den geschlossenen radial inneren Ring wird der Magnetfluß genau und optimal geführt, und die Klappanker werden durch den sehr genau herstellbaren radial inneren Ring sehr genau gelagert, weil die Aufnahmemittel an dem geschlossenen Ring sehr genau positioniert werden können.The object is achieved in that the electromagnetic coil carrier radially outside individual magnetic yoke legs has, which are each aligned with a needle application point or needle attachment point, that the radially inner magnetic yokes are formed into a closed, circular or polygonal ring and that the folding anchors are associated with the pivoting movements of the guide means, which interact with receiving means on the closed ring . The magnetic flux is guided precisely and optimally by the closed radially inner ring, and the hinged anchors are supported very precisely by the radially inner ring, which can be produced very precisely, because the receiving means can be positioned very precisely on the closed ring.
Die genaue Herstellung dieses radial inneren, geschlossenen Rings kann außerdem zu einer genauen Positionierung der Aufnahmemittel eingesetzt werden, indem der radial innere, geschlossene, kreisrunde oder polygonale Ring als Aufnahmemittel Vertiefungen aufweist, in die jeweils Führungsmittel für die Klappanker eingreifen.The exact manufacture of this radially inner, closed ring can also be used for precise positioning of the receiving means, in that the radially inner, closed, circular or polygonal ring has recesses as receiving means, into which guide means for the hinged anchors engage.
Die genaue Positionierung der Klappanker unter Einhaltung wirtschaftlich herstellbarer Toleranzen läßt sich noch dadurch verbessern, daß in die Vertiefungen des radial inneren geschlossenen Rings formähnliche Vorsprünge ragen, die mit einer Begrenzungsseite in paarweise Einschnitte zueinander benachbarter Klappanker ragen und mit einem die Klappanker jeweils überragenden Abschnitt in die Vertiefungen des radial inneren geschlossenen Rings eingreifen.The exact positioning of the hinged anchors while observing economically producible tolerances can be further improved by projecting into the recesses of the radially inner closed ring shape-like projections which protrude with a boundary side in pairs of incisions of mutually adjacent hinged anchors and with a section projecting above the hinged anchors Engage recesses in the radially inner closed ring.
Eine Maßnahme zur Optimierung des Magnetflusses besteht noch darin, daß die Breite des geschlossenen, kreisrunden oder polygonalen Rings dem erforderlichen Magnetfluß angepaßt ist.One measure for optimizing the magnetic flux is that the width of the closed, circular or polygonal ring is adapted to the required magnetic flux.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen
- Fig. 1 einen axialen Längsschnitt durch den Matrixnadeldruckkopf,
- Fig. 2 eine perspektivische Darstellung des einstückigen Elektromagnetspulenträgers mit zwei einzelnen Klappankern und Drucknadeln,
- Fig. 3 eine perspektivische Darstellung des im montierten Zustand dem Elektromagnetspulenträger aus Fig. 2 gegenüberliegenden Teils eines Nadelführungsgehäuses und
- Fig. 4 einen axialen Teillängsschnitt mit einstückigem Elektromagnetspulenträger, Klappanker und dem Nadelführungsgehäuse.
- 1 shows an axial longitudinal section through the matrix needle print head,
- 2 is a perspective view of the one-piece electromagnetic coil carrier with two individual folding anchors and pressure needles,
- Fig. 3 is a perspective view of the part of a needle guide housing opposite the electromagnetic coil carrier from Fig. 2 in the assembled state and
- Fig. 4 is an axial partial longitudinal section with one-piece electromagnetic coil carrier, hinged armature and the needle guide housing.
Der Matrixnadeldruckkopf der Klappankerbauart (Fig. 1) weist z.B. neun, zwölf, 18 oder 24 Drucknadeln 1 auf. Jeder Drucknadel 1 ist ein Magnetjochschenkelpaar 2, eine Elektromagnetspule 3 und ein Klappanker 4 zugeordnet, wobei die Elektromagnetspule 3 auf einen radial äußeren Magnetjochschenkel 2a aufgesteckt ist. Es sind neun solcher Systeme dargestellt.The hinged anchor type matrix needle printhead (Fig. 1) has e.g. nine, twelve, 18 or 24
Die Drucknadeln 1 sind in einem Drucknadelführungsgehäuse 5 mittels einzelner Führungswände 6 geführt, deren Bohrungen 7 den bogenförmigen Verlauf von einer Nadelangriffsstelle 8 eines Drucknadelkopfes 8a und dem Klappanker 4 bis zu einem Mundstück 9 festlegen, wobei das Mundstück 9 gegenüber einem nicht gezeichneten Druckwiderlager mit Abstand des Nadelhubes bei auf dem Druckwiderlager aufliegenden Aufzeichnungsträger liegt. Die Nadelangriffsstelle 8 kann auch aus einer Nadelbefestigungsstelle 8b bestehen, an der der Klappanker 4 mit der Drucknadel 2 verschweißt ist. Im Mundstück 9 sind sämtliche neun Drucknadeln 1 zu einer senkrechten Nadelspalte übereinander geführt und gelagert.The
Das Drucknadelführungsgehäuse 5 bildet im Bereich der Klappanker 4 eine dem äußeren Durchmesser (Nenndurchmesser) des Matrixnadeldruckkopfes entsprechende Schale 5a, die noch mit besonderen Funktionen oder Merkmalen ausgestattet ist. So befindet sich im Zentrum der Schale 5a eine Führungsbuchse 10, die ein Widerlager für eine Druckfeder 11 bildet, die jeder Drucknadel 1 zugeordnet ist. Weitere Merkmale und Funktionen der Schale 5a werden später beschrieben.The pressure needle guide housing 5 forms in the area of the hinged
Ein die Systeme aufnehmendes hinteres Gehäuse 12, das aus Kunststoff oder Aluminium (magnetisch nicht leitenden Werkstoffen) hergestellt ist, zentriert einen einstückigen Elktromagnetspulenträger 13 aus Sinter oder Feinguß. Der einteilige, sehr genau und von hoher Oberflächengüte hergestellte Elktromagnetspulenträger 13 liegt magnetisch durch elektrisch nicht leitende Füllstoffe 14 isoliert innerhalb des hinteren Gehäuses 12. Das Gehäuse 12 aus Aluminium ist außerdem mit einer zentrischen, wärmebeständig aufgeklebten Dämpfungsscheibe 15 versehen, auf der die radial inneren Ankerarme 4a in einer Grund- oder Ruhestellung aufliegen.A
Die Klappanker 4 sind mit den radial inneren Ankerarmen 4a durch diese Dämpfungsscheibe 15 festgelegt und etwa mittig durch einen im Querschnitt quadratischen elastischen Dämpfungsring 16 sowie durch den radial inneren gegenüberliegenden Magnetjochschenkel des Magnetjochschenkelpaares 2 schwenkgelagert.The hinged
Der einstückige Elektromagnetspulenträger 13 bildet radial außen die einzelnen Magnetjochschenkel 2a und die zugehörigen radial inneren Magnetjochschenkel bilden einen geschlossenen Ring 17, der kreisrund oder polygonal und nach der Anzahl der Systeme geformt ist.The one-piece
Die Klappanker 4 führen Schwenkbewegungen aus, um den Drucknadeln 1 eine Hubbewegung zu erteilen. Derartige Hubbewegungen (Vor- und Rückhub betragen ca. 0,3 mm) werden mit einer Frequenz von 2000 bis 3000 Hz ausgeführt. Um die Klappanker-Schwenkbewegungen schwingungstechnisch einwandfrei auszuführen, sind Führungsmittel 18 notwendig, die mit Aufnahmemitteln 19 (Fig. 2) an dem geschlossenen Ring 17 zusammenwirken.The
Im konkreten Ausführungsbeispiel (Fig. 2 bis 4) bestehen die Aufnahmemittel 19 aus Vertiefungen 20, in die als Führungsmittel 18 zu den Vertiefungen 20 formähnliche Vorsprünge 21 ragen. Die Vorsprünge 21 weisen eine Begrenzungsseite 21a und eine Begrenzungsseite 21b auf. Eine der beiden Begrenzungsseiten 21a bzw. 21b ragt in paarweise Einschnitte 4b, 4c der Klappanker 4. Die Vorsprünge 21 überragen jedoch auch in diesen Einschnitten 4b, 4c die Klappanker 4 mit Abschnitten 21c. Mit diesen Abschnitten 21c greifen die Vorsprünge 21 in die Vertiefungen 20 des radial inneren geschlossenen Rings 17 ein. Die Vorsprünge 21 zentrieren sowohl die Klappanker 4, bilden somit auf deren Schwenkbewegungen abgestellte Führungsmittel 18, die mit den Aufnahmemitteln 19 an dem geschlossenen Ring 17 zusammenwirken.In the specific exemplary embodiment (FIGS. 2 to 4), the receiving means 19 consist of
Die Klappanker 4 sind im Bereich des radial inneren Ankerarmes 4a jeweils mittels Nocken 22 zusätzlich geführt. Die Schale 5a wird von der in Fig. 3 dargestellten umgedrehten Lage (für einen besseren Einblick) in die in Fig. 4 gezeigte Betriebslage, d.h. in umgedrehter Lage auf den Ring 17 in Fig. 2 aufgesetzt. Zur Orientierung bei diesem Aufsetzvorgang dient die Richtung des Verlaufs der Drucknadeln 1 in den Fig. 2 und 3.The hinged
Von den Elektromagnetspulen 3 sind (Fig. 1) Anschlußleitungen 23 durch die Füllmasse 14 zu einer Leiterplatine 24 geführt. Die Leiterplatine 24 wird durch einen Deckel 25 geschützt. Das Drucknadelführungsgehäuse 5 bzw. die Schale 5a und das hintere Gehäuse 12 werden durch mehrere Schrauben 26 mit Muttern 27 zusammengehalten.From the electromagnetic coils 3 (FIG. 1), connecting
Die Breite 17a des Ringes 17 (Fig. 4) dient als Einstellungsmaßnahme für die Optimierung des Magnetflusses, um mit der günstigsten magnetischen Sättigung zu arbeiten.The
Der gesamte in Fig. 1 dargestellte Matrixdruckkopf wird mittels eines Paares von Paßstiften 28 auf einen Druckkopfschlitten aufgesetzt.The entire matrix print head shown in FIG. 1 is placed on a print head carriage by means of a pair of
Claims (4)
dadurch gekennzeichnet,
daß der Elektromagnetspulenträger (13) radial außen einzelne Magnetjochschenkel (2a) aufweist, die jeweils auf eine Nadelangriffsstelle (8) bzw. Nadelbefestigungsstelle (8b) ausgerichtet sind, daß die radial inneren Magnetjoche zu einem geschlossenen, kreisrunden oder polygonalen Ring (17) geformt sind und daß den Klappankern (4) jeweils auf deren Schwenkbewegungen abgestellte Führungsmittel (18), die mit Aufnahmemitteln (19) an dem geschlossenen Ring (17) zusammenwirken, zugeordnet sind.1. matrix needle printhead of the hinged armature type with several systems, each consisting of a pair of magnetic yoke legs (2), an electromagnetic coil (3), a hinged armature (4) and a pressure needle (1), further with an electromagnetic coil carrier (13) made of sintered or investment casting is produced and forms a one-piece component together with a base plate and the magnetic yoke leg pairs (2),
characterized,
that the electromagnetic coil support (13) has radially outer individual magnetic yoke legs (2a), each of which is aligned with a needle engagement point (8) or needle attachment point (8b), that the radially inner magnetic yokes are formed into a closed, circular or polygonal ring (17) and that the folding anchors (4) are each assigned to their pivoting movement guide means (18) which cooperate with receiving means (19) on the closed ring (17).
dadurch gekennzeichnet,
daß der radial innere, geschlossene, kreisrunde oder polygonale Ring (17) als Aufnahmemittel (19) Vertiefungen (20) aufweist, in die jeweils Führungsmittel (18) für die Klappanker (4) eingreifen.2. matrix needle printhead according to claim 1,
characterized,
that the radially inner, closed, circular or polygonal ring (17) has, as receiving means (19), depressions (20) which engage in the respective guide means (18) for the hinged anchors (4).
dadurch gekennzeichnet,
daß in die Vertiefungen (20) des radial inneren, geschlossenen Rings (17) formähnliche Vorsprünge (21) ragen, die mit einer Begrenzungsseite (21a bzw. 21b) in paarweise Einschnitte (4b,4c) zueinander benachbarter Klappanker (4) ragen und mit einem die Klappanker (4) jeweils überragenden Abschnitt (21c) in die Vertiefungen (20) des radial inneren, geschlossenen Rings (17) eingreifen.3. matrix needle printhead according to claims 1 and 2,
characterized,
that form-like projections (21) protrude into the recesses (20) of the radially inner, closed ring (17), which protrude with a limiting side (21a or 21b) into incisions (4b, 4c) adjacent to one another in pairs (4b, 4c) and with a section (21c) projecting above the hinged anchors (4) engages in the recesses (20) of the radially inner, closed ring (17).
dadurch gekennzeichnet,
daß die Breite (17a) des geschlossenen, kreisrunden oder polygonalen Rings (17) dem erforderlichen Magnetfluß angepaßt ist.4. matrix needle printhead according to claims 1 to 3,
characterized,
that the width (17a) of the closed, circular or polygonal ring (17) is adapted to the required magnetic flux.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP88730266A EP0371183B1 (en) | 1988-12-01 | 1988-12-01 | Wire matrix print head of the clapper type |
| DE3889662T DE3889662D1 (en) | 1988-12-01 | 1988-12-01 | Folding anchor type matrix needle printhead. |
| AT88730266T ATE105782T1 (en) | 1988-12-01 | 1988-12-01 | MATRIX PIN PRINT HEAD OF FLAP ANCHOR DESIGN. |
| JP1310461A JPH02188266A (en) | 1988-12-01 | 1989-11-29 | Dot matrix printing head of flap type amateur structure |
| US07/443,754 US5009529A (en) | 1988-12-01 | 1989-11-30 | Matrix print head of hinged-clapper-armature construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP88730266A EP0371183B1 (en) | 1988-12-01 | 1988-12-01 | Wire matrix print head of the clapper type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0371183A1 true EP0371183A1 (en) | 1990-06-06 |
| EP0371183B1 EP0371183B1 (en) | 1994-05-18 |
Family
ID=8200564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88730266A Expired - Lifetime EP0371183B1 (en) | 1988-12-01 | 1988-12-01 | Wire matrix print head of the clapper type |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5009529A (en) |
| EP (1) | EP0371183B1 (en) |
| JP (1) | JPH02188266A (en) |
| AT (1) | ATE105782T1 (en) |
| DE (1) | DE3889662D1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004028904A1 (en) * | 2004-06-15 | 2006-01-12 | Tallygenicom Computerdrucker Gmbh | Print head for use particularly with a needle matrix printer has ring formed yoke with non ferro-magnetic carrier |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5215389A (en) * | 1990-02-28 | 1993-06-01 | Citizen Watch Co., Ltd. | Print head for a dot matrix printer |
| CA2284621C (en) | 1997-03-21 | 2003-10-14 | The Procter & Gamble Company | Absorbent article wrapper comprising a side flap fastener cover |
| CN102744974A (en) * | 2011-04-19 | 2012-10-24 | 多美科信息科技（深圳）有限公司 | Needle type printing head |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273452A (en) * | 1978-09-29 | 1981-06-16 | Tokyo Shibaura Denki Kabushiki Kaisha | Print head for a dot printer |
| US4407591A (en) * | 1980-08-21 | 1983-10-04 | Ing. C. Olivetti & C., S.P.A. | Ballistic wire matrix print head |
| EP0110662A2 (en) * | 1982-12-01 | 1984-06-13 | Tokyo Electric Co. Ltd. | Dot printer head |
| EP0141522A1 (en) * | 1983-09-26 | 1985-05-15 | Tokyo Electric Co. Ltd. | Dot printer head |
| EP0155816A2 (en) * | 1984-03-15 | 1985-09-25 | Tokyo Electric Co., Ltd. | Dot printer head |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3340596A1 (en) * | 1982-11-16 | 1984-05-24 | Tokyo Electric Co., Ltd., Tokyo | MATRIX PRINTER |
| JPS60189457A (en) * | 1984-03-08 | 1985-09-26 | Tokyo Electric Co Ltd | Dot printer head |
| DE3412855A1 (en) * | 1984-04-03 | 1985-10-03 | Mannesmann AG, 4000 Düsseldorf | MATRIX PRINT HEAD |
| US4594010A (en) * | 1984-04-23 | 1986-06-10 | Bsr, Ltd. | Wire matrix print head |
-
1988
- 1988-12-01 AT AT88730266T patent/ATE105782T1/en not_active IP Right Cessation
- 1988-12-01 EP EP88730266A patent/EP0371183B1/en not_active Expired - Lifetime
- 1988-12-01 DE DE3889662T patent/DE3889662D1/en not_active Expired - Fee Related
-
1989
- 1989-11-29 JP JP1310461A patent/JPH02188266A/en active Pending
- 1989-11-30 US US07/443,754 patent/US5009529A/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273452A (en) * | 1978-09-29 | 1981-06-16 | Tokyo Shibaura Denki Kabushiki Kaisha | Print head for a dot printer |
| US4407591A (en) * | 1980-08-21 | 1983-10-04 | Ing. C. Olivetti & C., S.P.A. | Ballistic wire matrix print head |
| EP0110662A2 (en) * | 1982-12-01 | 1984-06-13 | Tokyo Electric Co. Ltd. | Dot printer head |
| EP0141522A1 (en) * | 1983-09-26 | 1985-05-15 | Tokyo Electric Co. Ltd. | Dot printer head |
| EP0155816A2 (en) * | 1984-03-15 | 1985-09-25 | Tokyo Electric Co., Ltd. | Dot printer head |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004028904A1 (en) * | 2004-06-15 | 2006-01-12 | Tallygenicom Computerdrucker Gmbh | Print head for use particularly with a needle matrix printer has ring formed yoke with non ferro-magnetic carrier |
| DE102004028904B4 (en) * | 2004-06-15 | 2006-08-17 | Tallygenicom Computerdrucker Gmbh | Print head for use particularly with a needle matrix printer has ring formed yoke with non ferro-magnetic carrier |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0371183B1 (en) | 1994-05-18 |
| ATE105782T1 (en) | 1994-06-15 |
| US5009529A (en) | 1991-04-23 |
| DE3889662D1 (en) | 1994-06-23 |
| JPH02188266A (en) | 1990-07-24 |
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