EP0150663B1 - Matrix printer head with adjustable print wire guide - Google Patents
Matrix printer head with adjustable print wire guide Download PDFInfo
- Publication number
- EP0150663B1 EP0150663B1 EP84730139A EP84730139A EP0150663B1 EP 0150663 B1 EP0150663 B1 EP 0150663B1 EP 84730139 A EP84730139 A EP 84730139A EP 84730139 A EP84730139 A EP 84730139A EP 0150663 B1 EP0150663 B1 EP 0150663B1
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- EP
- European Patent Office
- Prior art keywords
- print wire
- armature component
- adjustment
- matrix
- 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 - Lifetime
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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
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
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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
- 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 its side facing away from the pressure needle abutment and a pressure needle adjustment assembly facing the pressure abutment, which has a pressure needle adjustment drive, the pressure needle drive assembly and the pressure needle adjustment assembly being both in a separate housing, the two being in a separate housing are releasably connected to one another, the pressure needle adjusting assembly having an electromagnetic coil with a magnetic core arranged inside its housing, an anchor component, in the housing of the pressure needle adjusting assembly running approximately in the direction of the printing needles, being fastened to pivot about a pivot axis in the direction transverse to the printing needles, wherein the pressure needle guide is attached to the end of the anchor component facing the pressure abutment.
- Such matrix printheads with adjustable print needle guidance are used for writing quick and / or fine writing, the quick writing with the unchanged position of the printing needle guidance being written in successive lines from left to right or right to left, while 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 consists, for example, of seven to nine needles. It is of course possible, provided that the space available in the matrix print head allows for construction, also to provide a plurality of adjacent needle gaps, each with seven to nine printing needles arranged one above the other.
- a matrix print head of the type mentioned are known from DE-A-30 41 877.
- a mouthpiece for printing needles is shown and described there, which is held on an organ transmitting the adjusting drive force, which extends approximately parallel to the printing needles and which forms pole faces which lie opposite the magnetic poles of the electromagnet.
- the electromagnet is arranged transversely, so that two pole gaps arise and the accommodation of the printing needles and their storage is problematic.
- the invention is based on the object of designing a matrix needle printhead of the type mentioned at the outset in such a way that an adaptation of the pressure needle adjusting assembly to the existing pressure needles or their guides, i.e. to the available space. Since a matrix needle print head has a slim front housing for the printing needle group, the printing needle adjustment assembly must be adapted to this housing.
- the armature component runs approximately parallel to the electromagnetic coil, the longitudinal axis of which is arranged approximately parallel to the pressure needles, that a protruding from the interior of the electromagnetic coil, the pressure abutment facing the front end of the magnetic core together with the pivotable armature component a stroke
- the pressure needle adjustment assembly has a pivot bearing for receiving the end of the adjustment armature facing away from the pressure abutment and for enabling the pivoting movement of the armature component, that the armature component in the two pressure needle adjustment devices is under the force of one or more springs, and that the front one End of the magnetic core part of the swivel path of the anchor component limiting device in both directions.
- the advantage achieved with the invention is essentially to be seen in the fact that the printing needle adjustment assembly is optimally adapted to the housing shape of the matrix print head, so that no constructional difficulties arise with the usual course of the printing needles and the construction here allows the needle stroke to be as precise as possible To be able to adjust, so that the displacement of the needle column can be carried out in the desired manner in order to achieve fine writing quality.
- a length adjustment of printing needles which are unevenly worn in their length can, for example, after an improvement of the subject matter of the invention. 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 readjustment of the printing needles or their wear.
- the armature component consists of a metal lever which is pivot-mounted in the area facing the pressure needle drive assembly without play, loaded with a spiral spring.
- the armature component can therefore advantageously run through the adjustment path for the pressure needle guide by means of a slight pitching movement, a considerably large radius being created for this pitching movement, which makes any arch movement of the pressure needle guide negligibly small.
- the anchor component is 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 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.
- This design leads to the desired one Magnetic flux circuit without taking up much space for the structural placement of the parts and without having to accept excessive scattering losses.
- the working air gap between the front end of the magnetic core and the armature component is adjustable by means of an adjusting screw mounted on the housing of the pressure needle adjusting assembly. This feature is of considerable importance with regard to the precision with which the stroke adjustment of the pressure needle guide between two pressure passes, ie before a respective forward and backward pressure pass, has to be carried out in order to produce the fine print.
- the adjustment of the pressure needle guide is also improved for the adjustment path of the pressure needle guide in that the stop 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 supplements 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 parallel and is arranged 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).
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Abstract
Description
Die Erfindung betrifft einen Matrixdruckkopf mit verstellbrer Drucknadelführung bestehend aus einer auf seiner vom Drucknadelwiderlager abgewandten Seite angeordneten Drucknadelantriebsbaugruppe und aus einer dem Druckwiderlager zugewandten Drucknadelverstellbaugruppe, die einen Drucknadelverstellantrieb aufweist, wobei die Drucknadelantriebsbaugruppe und die Drucknadelverstellbaugruppe jeweils in einem getrennten Gehäuse angeorndet sind, wobei die beiden Gehäuse miteinander lösbar verbunden sind, wobei die Drucknadelverstellbaugruppe eine innerhalb ihres Gehäuses angeordnete Elektromagnetspule mit einem Magnetkern aufweist, wobei ein Ankerbauteil, im Gehäuse der Drucknadelverstellbaugruppe etwa in Richtung der Drucknadeln verlaufend, um eine Schwenkachse in Richtung quer zu den Drucknadeln hin- und herschwenkbar befestigt ist, wobei an dem dem Druckwiderlager zugewandten Ende des Ankerbauteils die Drucknadelführung befestigt ist.The invention relates to a matrix print head with an adjustable pressure needle guide consisting of a pressure needle drive assembly arranged on its side facing away from the pressure needle abutment and a pressure needle adjustment assembly facing the pressure abutment, which has a pressure needle adjustment drive, the pressure needle drive assembly and the pressure needle adjustment assembly being both in a separate housing, the two being in a separate housing are releasably connected to one another, the pressure needle adjusting assembly having an electromagnetic coil with a magnetic core arranged inside its housing, an anchor component, in the housing of the pressure needle adjusting assembly running approximately in the direction of the printing needles, being fastened to pivot about a pivot axis in the direction transverse to the printing needles, wherein the pressure needle guide is attached to the end of the anchor component facing the pressure abutment.
Derartige Matrixdruckköpfe mit verstellbarer Drucknadelführung dienen dem Schreiben von Schnell- und/oder Schönschrift, wobei die Schnellschrift mit unveränderter Stellung der Drucknadelführung in aufeinanderfolgenden Zeilen von links nach rechts bzw. rechts nach links geschrieben wird, während die Schönschrift bzw. eine relativ schnell geschriebene Schönschrift durch zweimaliges Überschreiben ein und derselben Zeile in gegenläufigen Druckpässen unter Verstellung der Drucknadelführung geschrieben wird. Hierbei besteht die Nadelspalte z.B. aus sieben bis neun Nadeln. Es ist selbstverständlich möglich, soweit es der konstuktiv zur Verfügung stehende Raum im Matrixdruckkopf zuläßt, auch mehrere nebeneinanderliegende Nadelspalten mit jeweils sieben bis neun übereinander angeordneten Drucknadeln vorzusehen.Such matrix printheads with adjustable print needle guidance are used for writing quick and / or fine writing, the quick writing with the unchanged position of the printing needle guidance being written in successive lines from left to right or right to left, while 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. Here, the needle gap consists, for example, of seven to nine needles. It is of course possible, provided that the space available in the matrix print head allows for construction, also to provide a plurality of adjacent needle gaps, each with seven to nine printing needles arranged one above the other.
Die Merkmale eines Matrixdruckkopfes der eingangs genannten Art sind aus der DE-A-30 41 877 bekannt. Es ist dort ein Mundstück für Drucknadeln dargestellt und beschrieben, das an einem die Verstellantriebskraft übertragenden Organ gehalten ist, das sich etwa parallel zu den Drucknadeln erstreckt und das Polflächen bildet, die den Magnetpolen des Elektromagneten gegenüberliegen. Der Elektromagnet ist jedoch quer angeordnet, so daß zwei Polspalte entstehen und die Unterbringung der Drucknadeln sowie ihre Lagerung problematisch ist.The features of a matrix print head of the type mentioned are known from DE-A-30 41 877. A mouthpiece for printing needles is shown and described there, which is held on an organ transmitting the adjusting drive force, which extends approximately parallel to the printing needles and which forms pole faces which lie opposite the magnetic poles of the electromagnet. However, the electromagnet is arranged transversely, so that two pole gaps arise and the accommodation of the printing needles and their storage is problematic.
Der Erfindung liegt die Aufgabe zugrunde, einen Matrixnadeldruckkopf der eingangs genannten Art so auszubilden, daß eine Anpassung der Drucknadelverstellbaugruppe an die vorhandenen Drucknadeln bzw. deren Führungen, d.h. an den zur Verfügung stehenden Raum erreicht wird. Da ein Matrixnadeldruckkopf ein schlankes vorderes Gehäuse für die Drucknadelgruppe aufweist, ist die Drucknadelverstellbaugruppe diesem Gehäuse anzupassen.The invention is based on the object of designing a matrix needle printhead of the type mentioned at the outset in such a way that an adaptation of the pressure needle adjusting assembly to the existing pressure needles or their guides, i.e. to the available space. Since a matrix needle print head has a slim front housing for the printing needle group, the printing needle adjustment assembly must be adapted to this housing.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Ankerbauteil etwa parallel zu der Elektromagnetspule verläuft, deren Längsachse etwa parallel zu den Drucknadeln angeordnet ist, daß ein aus dem Innenraum der Elektromagnetspule herausragendes, dem Druckwiderlager zugewandtes vorderes Ende des Magnetkerns zusammen mit dem schwenkbaren Ankerbauteil einen Hub bestimmenden Arbeitsluftspalt bildet, daß die Drucknadelverstellbaugruppe ein Schwenklager zur Aufnahme des vom Druckwiderlager abgewandten Endes des Verstellankers und zur Ermöglichung der Schwenkbewegung des Ankerbauteils aufweist, daß das Ankerbauteil in den beiden Drucknadel-Verstelleinrichtungen unter der Kraft von einer oder mehreren Federn steht, und daß das vordere Ende des Magnetkerns Teil einer den Schwenkweg des Ankerbauteils in beiden Richtungen begrenzenden Anschlageinrichtung ist.This object is achieved in that the armature component runs approximately parallel to the electromagnetic coil, the longitudinal axis of which is arranged approximately parallel to the pressure needles, that a protruding from the interior of the electromagnetic coil, the pressure abutment facing the front end of the magnetic core together with the pivotable armature component a stroke Determining working air gap forms that the pressure needle adjustment assembly has a pivot bearing for receiving the end of the adjustment armature facing away from the pressure abutment and for enabling the pivoting movement of the armature component, that the armature component in the two pressure needle adjustment devices is under the force of one or more springs, and that the front one End of the magnetic core part of the swivel path of the anchor component limiting device in both directions.
Der mit der Erfindung erzielte Vorteil ist im wesentlichen darin zu sehen, daß die Drucknadelverstellbaugruppe optimal an die Gehäuseform des Matrixdruckkopfes angepaßt ist, so daß bei gewöhnlichem Verlauf der Drucknadeln keinerlei konstruktive Schwierigkeiten entstehen und die hier getroffene Bauweise es erlaubt, den Nadelhub so genau wie möglich einstellen zu können, so daß die Verlagerung der Nadelspalte in gewünschter Weise erfolgen kann, um Schönschriftqualität zu erreichen.The advantage achieved with the invention is essentially to be seen in the fact that the printing needle adjustment assembly is optimally adapted to the housing shape of the matrix print head, so that no constructional difficulties arise with the usual course of the printing needles and the construction here allows the needle stroke to be as precise as possible To be able to adjust, so that the displacement of the needle column can be carried out in the desired manner in order to achieve fine writing quality.
Eine Längenjustierung von in ihrer Länge ungleich abgenutzten Drucknadeln kann nach einer Verbesserung des Erfindungsgegenstandes z.B. dahingehend vorgenommen werden, daß zwischen den Gehäusen der Drucknadelantriebsbaugruppe und der Drucknadelverstellbaugruppe austauschbare Beilagen angeordnet sind. Solche Beilagen können z.B. aus Distanzblechen einer solchen Dicke bestehen, die dem Nachstellen der Drucknadeln bzw. deren Verschleiß entspricht.A length adjustment of printing needles which are unevenly worn in their length can, for example, after an improvement of the subject matter of the invention. 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 readjustment of the printing needles or their wear.
In Weiterbildung der Erfindung ist vorgesehen, daß der Ankerbauteil aus einem Metallhebel besteht, der in dem der Drucknadelantriebsbaugruppe zugewandten Bereich spielfrei, mit einer Biegefeder belastet, schwenkgelagert ist. Der Ankerbauteil kann daher vorteilhafterweise durch eine geringe Nickbewegung den Verstellweg für die Drucknadelführung durchlaufen, wobei ein erheblich großer Radius für diese Nickbewegung entsteht, die eine etwaige Bogenbewegung der Drucknadelführung vernachlässigbar klein macht.In a further development of the invention, it is provided that the armature component consists of a metal lever which is pivot-mounted in the area facing the pressure needle drive assembly without play, loaded with a spiral spring. The armature component can therefore advantageously run through the adjustment path for the pressure needle guide by means of a slight pitching movement, a considerably large radius being created for this pitching movement, which makes any arch movement of the pressure needle guide negligibly small.
Um ein sicheres Feststellen der Drucknadelführung in der jeweils gewählten oberen oder unteren Verstellweglage zu erreichen, wird vorgeschlagen, daß der Ankerbauteil im Bereich der Drucknadelantriebsbaugruppe mittels einer Biegefeder und in dem dem Druckwiderlager zugewandten Bereich mittels einer Druck- oder Zugfeder beaufschlagt ist. Der Elektromagnet hebt daher jeweils die entsprechenden Kräfte der Federn auf, wobei die Biegefeder dazu beiträgt, eine genau definierte Drehachse für den Ankerbauteil um sein hinteres Endlager zu gewährleisten.In order to achieve a secure locking of the pressure needle guide in the respectively selected upper or lower adjustment path position, it is proposed that the anchor component is 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.
Die beschriebenen Nickbewegungen werden außerdem in ihrer Präzision noch dadurch gesteigert, daß der Ankerbauteil zwischen seitlichen Führungen angeordnet ist. Diese Führungen sorgen für eine weitestgehend reibungsarme und somit verschleißarme seitliche Lagerung des Ankerbauteils.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.
In weiterer Verbesserung der Erfindung ist vorgesehen, daß der metallische Magnetkern innerhalb der Elektromagnetspule in einem isolierenden Werkstoff gelagert ist. Diese Maßnahme unterstützt die Bildung eines Lagers für den Magnetkern, und zwar im Sinne einer Festlegung des Magnetkerns, so daß dieser praktisch keine Bewegung ausführen kann und gleichzeitig die erwähnten Streuverluste des magnetischen Flusses vermieden werden.In a further improvement of the invention it is provided that 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.
In Weiterbildung der Erfindung ist vorgesehen, daß der Magnetkern der Elektromagnetspule in dem der Drucknadelantriebsbaugruppe zugewandten Bereich das Endlager für den Ankerbauteil bildet. Diese Gestaltungsweise führt zu dem gewünschten Magnetflußkreis, ohne großen Raum für die konstruktive Unterbringung der Teile zu beanspruchen und ohne allzu große Streuverluste hinnehmen zu müssen. In weiterer Verbesserung der Erfindung ist vorgesehen, daß der Arbeitsluftspalt zwischen dem vorderen Ende des Magnetkerns und dem Ankerbauteil mittels einer am Gehäuse der Drucknadelverstellbaugruppe gelagerten Einstellschraube einstellbar ist. Dieses Merkmal ist von erheblicher Bedeutung im Hinblick auf die Präzision, mit der die Hubverstellung der Drucknadelführung zwischen zwei Druckpässen, d.h. vor einem jeweiligen Vor- und Rückdruckpaß vorgenommen werden muß, um die Schönschrift zu erzeugen.In a further development of the invention, it is provided that the magnetic core of the electromagnetic coil forms the end bearing for the armature component in the area facing the pressure needle drive assembly. This design leads to the desired one Magnetic flux circuit without taking up much space for the structural placement of the parts and without having to accept excessive scattering losses. In a further improvement of the invention it is provided that the working air gap between the front end of the magnetic core and the armature component is adjustable by means of an adjusting screw mounted on the housing of the pressure needle adjusting assembly. This feature is of considerable importance with regard to the precision with which the stroke adjustment of the pressure needle guide between two pressure passes, ie before a respective forward and backward pressure pass, has to be carried out in order to produce the fine print.
Die Justierung der Drucknadelführung wird außerdem dadurch für den Verstellweg der Drucknadelführung verbessert, indem die Anschlageinrichtung für den Ankerbauteil aus einem den Verstellweg für die Drucknadelführung begrenzenden Anschlag und aus den Mitteln für die Regulierung des Arbeitsluftspaltes besteht. Diese Maßnahmen legen daher die Endstellungen der Drucknadelführung sehr genau fest und lassen im praktischen Betrieb des Matrixdruckers eine äußerst genaue Justierung auf die Druckzelle zu.The adjustment of the pressure needle guide is also improved for the adjustment path of the pressure needle guide in that the stop 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. These measures therefore define the end positions of the printing needle guide very precisely and, in practical operation of the matrix printer, allow an extremely precise adjustment to the printing cell.
Fertigungstechnisch ist außerdem vorteilhaft, daß das Gehäuse für die Drucknadelverstellbaugruppe aus Kunststoff besteht und daß der Magnetkern der Elektromagnetspule an einem Gehäusevorsprung ultraschallgeschweißt ist. Diese Maßnahme vereinfacht die Befestigung des metallischen Magnetkernes der Elektromagnetspule und macht besondere Befestigungsmittel entbehrlich.In terms of production technology, it is also advantageous that 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.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Die einzige Figur der Zeichnung zeigt einen axialen Längsschnitt durch die hintereinander angeordnete Drucknadelantriebsbaugruppe und Drucknadelverstellbaugruppe.An embodiment of the invention is shown in the drawing and will be described in more detail below. The only figure in the drawing shows an axial longitudinal section through the pressure needle drive assembly and pressure needle adjustment assembly arranged one behind the other.
Der Matrixdruckkopf mit verstellbarer Drucknadelführung liegt dem Druckwiderlager 1, hier als Schreibwalze ausgeführt, gegenüber.The matrix print head with adjustable print needle guide lies opposite the platen 1, here designed as a platen roller.
Der erfindungsgemäße Matrixdruckkopf ist in die Drucknadelantriebsbaugruppe 2 und in die Drucknadelverstellbaugruppe 3 gegliedert. Der Drucknadelverstellantrieb 4 wird in seinem Aufbau noch genauer beschrieben werden. Die Drucknadelantriebsbaugruppe 2 wird durch das Gehäuse 5 umschlossen und nimmt im wesentlichen Bauteile, wie die jeder Drucknadel 6 zugeordnete Elektromagnetspule 7, Jochkörper 8, Klappanker 9, Anschlag 10, Drucknadelkopf 11, Rückholfeder 12 und hinteres Drucknadellager 13 auf. Der Aufbau der Drucknadelantriebsbaugruppe 2, deren Aufgabe es ist, die vorhandenen Drucknadeln 6 abzuschießen, um Druckpunkte auf dem Aufzeichnungsträger 14 abzudrucken, ist nicht unmittelbar Teil der vorliegenden Erfindung. Von Bedeutung für die Erfindung ist hingegen die Befestigung des Gehäuses 5 mit dem Gehäuse 15 unter Hinzufügung der austauschbaren Beilagen 16. Die Hereinnahme der austauschbaren Beilagen 16 stellt einen ersten Schritt zur genauen Justierung der Drucknadeln 6 dar, die in ihrer Länge im Bereich 17 des Druckwiderlagers 1 verschleißen und nachgestellt werden können, indem eine der Beilagen 16 entnommen, wonach die Drucknadeln 6 am Rubin 18 auf ihre zweckmäßige Länge nachgeschliffen werden.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
Innerhalb des Gehäuses 15 für die Drucknadelverstellbaugruppe 3 befindet sich der Drucknadelverstellantrieb 4, der sich etwa parallel erstreckend und in der Längsrichtung der Drucknadeln 6 verlaufend angeordnet ist. Diese Anordnung erspart erheblich an Raum und paßt sich an die langgestreckte Form des Gehäuses 15 an.Located within the
Die Drucknadelverstellbaugruppe 3 weist ferner den ebenfalls parallel verlaufenden Ankerbauteil 19 auf, die sich parallel erstreckende Elektromagnetspule 20, ein Endlager 21 für den Ankerbauteil 19 sowie eine Feststelleinrichtung 22 für den Ankerbauteil 19, wobei am vorderen Ende 19a die Drucknadelführung 23 verstellbar gelagert ist. Die neun übereinanderliegenden Drucknadeln 6 sind an ihrer Spitze in dem Rubin 18 geführt, der selbst in einer Einfassung gelagert ist und mit dem Ankerbauteil 19 verbunden ist. Der Ankerbauteil 19 besteht aus einem Metallhebel 24, der an seinem Ende 19b drehgelagert ist. Der Metallhebel 24 steht in einer der beiden Drucknadelführung-Verstellrichtungen 25 und 26 unter der Kraft der Druckfeder 27 und liegt an dem Anschlag 28 an. Am Ende 19b liegt der Ankerbauteil mit einem abgewinkelten Abschnitt in einer Ausnehmung 29 und wird in dieser Lage durch die Biegefeder 30 gesichert. Seitliche Führungen 31 sorgen für eine Bewegung in der gewünschten Ebene.The pressure needle adjustment assembly 3 also has the
Die Drucknadeln 6 sind außer in der Drucknadelführung 23 in den Stützebenen 32, 33 und 34 geführt.The
Innerhalb der Elektromagnetspule 20 befindet sich der isolierende Spulenkörper 35 und in dessen Innenraum der metallische Magnetkern 36. An dem vorderen Ende 36a des Magnetkerns 36 bildet der Magnetkern zusammen mit dem Ankerbauteil 19 den Arbeitsluftspalt 37.The
Der abgewinkelte Abschnitt 19c des Ankerbauteils 19 ergibt eine günstige Angriffsstelle für die Biegefeder 30. Der Magnetkern 36 befindet sich an dem Gehäusevorsprung 38 aus Kunststoff und ist durch eine ultraschallverschweißte Befestigung 39 gehalten.The
Zur Einjustierung des Ankerbauteils 19 und damit der Drucknadelführung 23 als zweiten Schritt für die Genauigkeit des Schriftbildes ist eine Einstellschraube 40 auf dein Gehäuse 15 der Drucknadelverstellbaugruppe 3 angeordnet, womit der Arbeitsluftspalt 37 und damit der Verstellweg der Drucknadelführung 23 präzise eingestellt werden können. Der Spulenkörper 35 ist mit einem Vorsprung 41 versehen, so daß auch die mit dem aus Kunststoff bestehenden Gehäuse 15 in Verbindung stehende Einstellschraube 40 keine Streuverluste des Magnetflusses innerhalb des Magnetkreises (bestehend aus dem Magnetkern 36 und dem Ankerbauteil 19) verursacht.To adjust the
Claims (10)
- A matrix print head with adjustable print wire guide (23), consisting of print wire drive components (2) located on its side remote from the print counter-surface (1) and of print wire adjustment components (3) close to the print counter-surface (1), which adjustment components have a print wire adjustment drive (4), the print wire drive components (2) and the print wire adjustment components (3) each being arranged in a separate housing (5 and 15 respectively), both housings (5 and 15) being connected together in detachable manner, the print wire adjustment components (3) having an electromagnetic coil (20) with a magnet core (36) located within their housing (15), an armature component (19) being attached so as to pivot back and forth about a pivot axis in a direction transverse to the print wires (6), running approximately in the direction of the print wires (6) in the housing (15) of the print wire adjustment components (3), the print wire guide (23) being attached to the end (19a) of the armature component (19) close to the print counter-surface (1),
characterised in that
the armature component (19) runs approximately parallel to the electromagnetic coil (20), the longitudinal axis of which is approximately parallel to the print wires (6), that a front end (36a) of the magnet core (36) projecting out of the interior of the electromagnetic coil (20) and close to the print counter-surface (1), together with the pivotable armature component (19), forms an operating air gap (37) which determines lift, that the print wire adjustment components (3) have a pivot bearing (21) to receive the end (19b) of the adjustment armature (19) which is remote from the print counter-surface and to permit the pivot movement of the armature component (19), that the armature component (19) is under the force of one or more springs (27) in the two print wire adjustment directions (25, 26), and that the front end (36a) of the magnet core (36) forms part of a stop means (22) limiting the pivot path of the armature component (19) in both directions. - A matrix print head according to Claim 1, characterised in that interchangeable shims (16) are arranged between the housings (5 and 15 respectively) of the print wire drive components (2) and of the print wire adjustment components (3).
- A matrix print head according to Claims 1 and 2, characterised in that the adjustment armature (19) consists of a metal lever (24) which is pivotably mounted without play, loaded by a bending spring (30), in the region close to the print wire drive components (2).
- A matrix print head according to Claims 1 to 3, characterised in that the armature component (19) in the region of the print wire drive components (2) is acted upon by means of a bending spring (30) and in the region close to the print counter-surface (1) by means of a pressure spring or tension spring (27).
- A matrix print head according to Claims 1 to 4, characterised in that the armature component (19) is arranged between lateral guides (31).
- A matrix print head according to Claims 1 to 5, characterised in that the metallic magnet core (36) is mounted in an insulating material within the electromagnetic coil (20).
- A matrix print head according to Claims 1 to 6, characterised in that the magnet core (36) of the electromagnetic coil (20) in the region close to the print wire drive components (2) forms the end bearing (21) for the armature component (19).
- A matrix print head according to Claims 1 to 7, characterised in that the operating air gap (37) between the front end (36a) of the magnet core (36) and the armature component (19) can be set by means of a setting screw (40) mounted on the housing (15) of the print wire adjustment components (3).
- A matrix print head according to Claims 1 to 8, characterised in that the stop means (22) for the armature component (19) consists of a stop (28) delimiting the path of adjustment for the print wire guide (13) and of the means for controlling the operating air gap (37).
- A matrix print head according to Claims 1 to 9, characterised in that the housing (15) for the print wire adjustment components (3) is made of plastic and that the magnet core (36) of the electromagnetic coil (20) is ultrasound-welded to a housing projection (38).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84730139T ATE73394T1 (en) | 1984-02-01 | 1984-12-13 | MATRIX PRINT HEAD WITH ADJUSTABLE NEEDLE GUIDE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3403795A DE3403795C2 (en) | 1984-02-01 | 1984-02-01 | Matrix needle printhead with a mouthpiece that can be adjusted in the direction of the columns |
DE3403795 | 1984-02-01 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0150663A2 EP0150663A2 (en) | 1985-08-07 |
EP0150663A3 EP0150663A3 (en) | 1986-12-03 |
EP0150663B1 true EP0150663B1 (en) | 1992-03-11 |
Family
ID=6226705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84730139A Expired - Lifetime EP0150663B1 (en) | 1984-02-01 | 1984-12-13 | Matrix printer head with adjustable print wire guide |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0150663B1 (en) |
JP (1) | JPS60165256A (en) |
AT (1) | ATE73394T1 (en) |
DE (3) | DE3403795C2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3403795C2 (en) * | 1984-02-01 | 1986-12-18 | Mannesmann AG, 4000 Düsseldorf | Matrix needle printhead with a mouthpiece that can be adjusted in the direction of the columns |
US4640633A (en) * | 1984-03-22 | 1987-02-03 | Dh Technology, Inc. | High-speed wire print head with wire print position shift apparatus |
ATE72545T1 (en) * | 1987-11-06 | 1992-02-15 | Mannesmann Ag | DOTS MATRIX PRINTER WITH ADJUSTABLE PIN GUIDE. |
DE4020010A1 (en) * | 1990-06-21 | 1992-01-09 | Mannesmann Ag | MATRIX NEEDLE PRINT HEAD |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2108006C3 (en) * | 1971-02-19 | 1974-12-12 | Walther-Bueromaschinen Gmbh, 7921 Gerstetten | Mosaic wire print head |
US4010835A (en) * | 1975-08-01 | 1977-03-08 | International Business Machines Corporation | Matrix print head |
DE2535699C3 (en) * | 1975-08-09 | 1978-12-14 | Olympia Werke Ag, 2940 Wilhelmshaven | Method and printer for producing fine-screen characters on a recording medium |
DE2927385C2 (en) * | 1979-07-04 | 1986-01-16 | Mannesmann AG, 4000 Düsseldorf | Hinged anchor printhead for a dot matrix printer |
JPS5644676A (en) * | 1979-09-20 | 1981-04-23 | Canon Inc | Wire matrix printer |
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 (en) * | 1980-11-06 | 1982-05-13 | Mannesmann AG, 4000 Düsseldorf | MATRIX PRINTER AND RELATED NEEDLE PRINT HEAD |
JPS57201669A (en) * | 1981-06-04 | 1982-12-10 | Tokyo Electric Co Ltd | Printing head for dot printer |
DE3403795C2 (en) * | 1984-02-01 | 1986-12-18 | Mannesmann AG, 4000 Düsseldorf | Matrix needle printhead with a mouthpiece that can be adjusted in the direction of the columns |
-
1984
- 1984-02-01 DE DE3403795A patent/DE3403795C2/en not_active Expired
- 1984-04-03 DE DE19843412854 patent/DE3412854A1/en active Granted
- 1984-12-13 DE DE8484730139T patent/DE3485577D1/en not_active Expired - Fee Related
- 1984-12-13 EP EP84730139A patent/EP0150663B1/en not_active Expired - Lifetime
- 1984-12-13 AT AT84730139T patent/ATE73394T1/en not_active IP Right Cessation
-
1985
- 1985-01-18 JP JP60007336A patent/JPS60165256A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0150663A3 (en) | 1986-12-03 |
DE3403795C2 (en) | 1986-12-18 |
EP0150663A2 (en) | 1985-08-07 |
JPS60165256A (en) | 1985-08-28 |
DE3412854A1 (en) | 1985-10-03 |
ATE73394T1 (en) | 1992-03-15 |
DE3485577D1 (en) | 1992-04-16 |
JPH0432744B2 (en) | 1992-06-01 |
DE3412854C2 (en) | 1987-11-19 |
DE3403795A1 (en) | 1985-08-08 |
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