EP0267480B1 - Ink ribbon cartridge drive mechanism and cooperating ink ribbon cartridge - Google Patents
Ink ribbon cartridge drive mechanism and cooperating ink ribbon cartridge Download PDFInfo
- Publication number
- EP0267480B1 EP0267480B1 EP87115670A EP87115670A EP0267480B1 EP 0267480 B1 EP0267480 B1 EP 0267480B1 EP 87115670 A EP87115670 A EP 87115670A EP 87115670 A EP87115670 A EP 87115670A EP 0267480 B1 EP0267480 B1 EP 0267480B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive shaft
- cassette
- further characterized
- combination according
- coupling
- 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
-
- 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
- B41J32/00—Ink-ribbon cartridges
-
- 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
- B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
- B41J33/14—Ribbon-feed devices or mechanisms
Definitions
- the invention relates to a combination of the type mentioned in the preamble of claim 1.
- the cassettes of the type mentioned in the preamble of claim 1 have become established, in which the transport roller arranged inside the cassette is coupled to a drive shaft when the cassette is inserted into the cassette device .
- a combination of the generic type is already known, in which the cassette is inserted into and removed from the cassette device in the direction of the transport roller axis (DE-OS 30 15 726).
- a knife-like driver element formed on the end face of the drive shaft engages in a slot formed in the transport roller and couples both together.
- the transport roller and the drive shaft move away from each other again in the axial direction, so that the coupling is released again.
- the drive shaft is axially displaceable. In the decoupling position, it is retracted so far that the cassette can be inserted or pushed out unhindered.
- the cam surface formed at the leading end of the cassette causes the drive shaft to be automatically moved into its uncoupling position when the cassette is inserted. Only when the drive roller is aligned coaxially with the clutch shaft is the latter axially advanced by the spring means and coupled to the drive roller. Due to the coupling between the drive shaft and the transport roller, the cassette is at the same time secured against movement in the push-out direction, so that additional locking or fixing devices need not be provided.
- the drive shaft is shifted into its uncoupling position with the aid of the additional actuating means, which also means the locking the cassette is released so that it can be pushed out again.
- the ramp surface provided according to the invention is structurally very simple and can easily be attached to cassettes of otherwise conventional shape, so that cassettes designed in this way can also be used without problems in connection with known cassette devices.
- the cassette and the receiving compartment are provided with cooperating guide devices for guiding the cassette in the push-in and push-out directions. These ensure an exact guidance of the cassette, so that the cassette cannot deflect when the ramp surface hits the coupling end of the drive shaft; on the other hand, the guide devices ensure precise alignment of the transport roller with the drive shaft.
- the drive shaft protrudes through a through opening in a boundary wall of the receiving compartment and is axially displaceably mounted in a bearing block arranged on the rear side of this boundary wall; it carries a flange in the coupling position against the back of this boundary wall, which therefore defines the coupling position.
- a compression spring Arranged between this flange and a wall of the bearing block is a compression spring which surrounds the drive shaft and loads it in the direction of the coupling position.
- the actuating lever is formed by a pivoting lever which can be pivoted transversely to the drive shaft axis; this carries an actuating wedge which interacts with a wedge arrangement arranged on the drive shaft, as will be described in more detail using an exemplary embodiment.
- a drive pinion coaxial with the drive shaft is mounted on the side of the boundary wall facing the receiving compartment and has a central recess complementary to the cross-sectional profile of the coupling end of this drive shaft; this permits passage and axial displacement of the drive shaft and at the same time effects the rotary coupling between the drive pinion and the drive shaft.
- the drive pinion itself is connected to a drive motor in any way.
- the tape cassette 2 shown in Fig. 1 has a substantially rectangular, flat shape.
- a transport roller 4 is rotatably mounted within the cassette 2 and transports a tape located in the cassette 2, for example an ink ribbon.
- the transport roller 4 is provided with an axial coupling recess 6, which can be blind or continuous.
- the cassette 2 can be inserted or pushed out in the direction of the double arrow 8 into the receiving compartment 10 of a tape device.
- guide webs 14 are formed on the long side edges 12 of the cassette 2; these engage in guide grooves 16 which are formed in the side edges 18 corresponding side walls 18 of the receiving compartment 10.
- a drive shaft 22 projects through the lower boundary wall 20 of the receiving compartment 10. This is axially displaceable in the direction of the double arrow 24 between the fully extended coupling position shown in FIG. 1 and a retracted decoupling position.
- the part of the drive shaft 22 which is visible in FIG. 1 is the coupling end 26, which is profiled approximately in cross shape in cross section.
- the cross section of the coupling end is complementary to the cross section of the coupling recess 6 of the transport roller 4.
- the coupling end 26 can therefore be coupled to the transport roller 4 in a form-fitting manner.
- a ramp surface 30 is formed which, when the cassette 2 is pushed into the receiving compartment 10, against the drive shaft 22 starts and presses it down so that it does not hinder insertion of the cassette 2.
- the coupling end slides along the underside of the cassette 2 until it comes into coaxial alignment with the transport roller 4, so that the coupling end 26 can snap into the coupling recess 6.
- the coupling end 26 and / or the coupling recess 6 can be chamfered in a known manner.
- an actuating lever 32 is provided which is pivotably mounted in the direction of the double arrow 34 about an articulation point 36.
- the drive shaft 22 is shifted from its illustrated coupling position into the retracted decoupling position, as will be explained with reference to FIGS. 2 to 4.
- the 1 also shows a drive pinion 38 which is coaxial with the drive shaft 22 and which is rotatably mounted on the boundary wall 20.
- the drive pinion has a central recess complementary to the cross-shaped cross-sectional profile of the coupling end 26, which allows the passage and the axial movement of the coupling end 26 and causes a rotary coupling between the drive pinion 38 and the drive shaft.
- the drive pinion 38 is connected to a drive motor in a conventional and therefore not shown manner.
- FIGS. 2 and 3 each show the drive shaft 22, the profiled coupling end 26 of which protrudes through a passage opening 40 formed in the boundary wall 20.
- a bearing block 42 arranged on the rear side of the boundary wall 20 serves for axially displaceable mounting of the drive shaft 22.
- the drive shaft 22 carries in the area in which the profiled coupling end 26 merges into the shaft part of the drive shaft, a flange 44 which, when the drive shaft is in the coupling position (see Fig. 2) bears against the boundary wall 20 and thus defines the coupling position.
- a compression spring 46 is arranged, which always tries to push the drive shaft 22 into its coupling position.
- the end of the drive shaft 22 facing away from the coupling end 26 projects beyond the bearing block 42.
- This end carries a guide block 48 with a guide surface 50 inclined to the axis of the drive shaft 22.
- the actuating lever 32 carries an actuating wedge 52, the wedge surfaces 54 and 56 of which interact with the guide surface 50 and the underside of the bearing block 42.
- the guide block 48 is pressed downward by the wedge action until it assumes the position shown in FIG. 3. This position corresponds to the decoupling position of the drive shaft 22, in which the coupling end 26 is withdrawn from the coupling recess 6 of the cassette 2.
- Fig. 4 shows the operating lever 32 in a rest position shown with full lines and a dash-dotted operating position.
- the actuating wedge 52 is made essentially of two parallel walls 60, 62 bent in the shape of a circular arc, the center of which lies in each case in the bearing 36.
- the upper and lower edges of the two walls 60, 62 form the wedge surfaces 56 and 54, respectively.
- the two walls 60, 62 enclose the guide block 48.
- the guide block 48 has a circular cross section, as can be seen in FIG. 4; in the area above the guide surface 50, however, it is flattened in such a way that the walls 60, 62 forming the actuating wedge 50 nestle against the guide block 48.
- the drive shaft 22 can be rotated relative to the guide block 48.
- the drive shaft 22 is driven in rotation via the drive pinion 38, as has already been explained with reference to FIG. 1.
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- Impression-Transfer Materials And Handling Thereof (AREA)
Description
Die Erfindung betrifft eine Kombination der im Oberbegriff des Anspruches 1 genannten Art.The invention relates to a combination of the type mentioned in the preamble of claim 1.
Neben Kassetten, bei denen der gesamte Bandtransport durch außerhalb der Kassette angeordnete Transportmittel erfolgt, haben sich die Kassetten der im Oberbegriff des Anspruches 1 genannten Art durchgesetzt, bei denen die innerhalb der Kassette angeordnete Transportrolle beim Einsetzen der Kassette in das Kassettengerät mit einer Antriebswelle gekuppelt wird.In addition to cassettes in which the entire tape is transported by means of transport arranged outside the cassette, the cassettes of the type mentioned in the preamble of claim 1 have become established, in which the transport roller arranged inside the cassette is coupled to a drive shaft when the cassette is inserted into the cassette device .
Durch die US-A-4,350,451 ist bereits eine Antriebseinrichtung sowie eine Farbbandkassette der im Oberbegriff des Anspruches 1 genannten Art bekannt. Die Farbbandkassette wird quer zur Achsenrichtung der Transportrollenachse in das Gerät eingeführt, bis die Aufwickelspule tangential an einer mit einem Motor verbundenen Antriebsrolle zur Anlage kommt, die die Aufwickelspule durch Reibung antreibt. Die Kassette wird durch Federmittel an die Antriebsrolle angedrückt, so daß die Aufwickelspule auch bei sich änderndem Durchmesser stets an der Antriebsrolle anliegt. Eine derartige Einrichtung ist durch den Nachführmechanismus verhältnismäßig aufwendig. Außerdem ist mit einem Reibantrieb nicht die Antriebszuverlässigkeit und -präzision zu erreichen wie mit einer formschlüssigen Antriebskupplung.From US-A-4,350,451 a drive device and an ink ribbon cassette of the type mentioned in the preamble of claim 1 are already known. The ribbon cassette is inserted into the device transversely to the axis direction of the transport roller axis until the take-up reel comes into contact tangentially with a drive roller connected to a motor, which drives the take-up reel by friction. The cassette is pressed against the drive roller by spring means, so that the take-up spool is always in contact with the drive roller even when the diameter changes. Such a device is relatively complex due to the tracking mechanism. In addition, the drive reliability and precision cannot be achieved with a friction drive as with a positive drive clutch.
Es ist auch bereits eine Kombination der gattungsgemäßen Art bekannt, bei welcher die Kassette in Richtung der Transportrollenachse in das Kassettengerät eingesetzt und aus diesem herausgenommen wird (DE-OS 30 15 726). Beim Einsetzen der Kassette greift ein an der Stirnseite der Antriebswelle ausgebildetes, messerartiges Mitnehmerelement in einen in der Transportrolle ausgebildeten Schlitz ein und kuppelt beide miteinander. Beim Herausnehmen der Kassette aus dem Kassettengerät entfernen sich die Transportrolle und die Antriebswelle in axialer Richtung wieder voneinander, so daß die Kupplung wieder gelöst wird.A combination of the generic type is already known, in which the cassette is inserted into and removed from the cassette device in the direction of the transport roller axis (DE-OS 30 15 726). When the cassette is inserted, a knife-like driver element formed on the end face of the drive shaft engages in a slot formed in the transport roller and couples both together. When the cassette is removed from the cassette device, the transport roller and the drive shaft move away from each other again in the axial direction, so that the coupling is released again.
Ein Nachteil der bekannten Anordnung wird darin gesehen, daß zusätzliche, die Kassette an mehreren Stellen haltende Arretiereinrichtungen vorgesehen werden müssen, die die Kassette im Aufnahmefach in ihrer Funktionsstellung fixieren. Zum Lösen dieser räumlich mehr oder weniger weit voneinander entfernten Arretiereinrichtungen müssen relativ aufwendige Betätigungseinrichtungen vorgesehen sein. Außerdem ist es aus konstruktiven Gründen nicht immer möglich, die Kassette in Richtung der Transportrollenachse einzusetzen bzw. zu entnehmen. Eine Einschiebe- bzw. Auswerfbewegung quer zur Transportrollenachse wirft aber neue konstruktive Probleme auf, da der eigentliche Kupplungs- und Entkupplungsvorgang zwischen der Antriebswelle und der vollkommen innerhalb der Außenkontur der Kassette liegenden Transportrolle in jedem Fall in axialer Richtung erfolgen muß.A disadvantage of the known arrangement is seen in the fact that additional locking devices holding the cassette at several points must be provided, which fix the cassette in its functional position in the receiving compartment. Relatively complex actuating devices must be provided to release these locking devices, which are spatially more or less distant from one another. In addition, for design reasons, it is not always possible to insert the cassette in Insert or remove the direction of the transport roller axis. An insertion or ejection movement transversely to the transport roller axis, however, poses new design problems, since the actual coupling and uncoupling process between the drive shaft and the transport roller lying completely inside the outer contour of the cassette must in any case take place in the axial direction.
Es ist die Aufgabe der vorliegenden Erfindung, eine Antriebseinrichtung sowie eine damit zusammenwirkende Kassette der im Oberbegriff des Anspruches 1 genannten Art zu schaffen, die mit möglichst einfachen konstruktiven Mitteln ein Einschieben und Auswerfen der Kassette quer zur Transportrollenachse erlauben.It is the object of the present invention to provide a drive device and a cassette interacting therewith of the type mentioned in the preamble of claim 1, which permit insertion and ejection of the cassette transversely to the transport roller axis with the simplest possible constructional means.
Diese Aufgabe ist erfindungsgemäß durch die im Kennzeichen des Anspruches 1 enthaltenen Merkmale gelöst.This object is achieved by the features contained in the characterizing part of claim 1.
Die Antriebswelle ist axial verschiebbar. In der Entkupplungsstellung ist sie soweit zurückgezogen, daß die Kassette unbehindert eingeschoben oder ausgeschoben werden kann. Die am voreilenden Ende der Kassette ausgebildete Nockenfläche bewirkt, daß die Antriebswelle beim Einschieben der Kassette automatisch in ihre Entkupplungsstellung verschoben wird. Erst wenn die Antriebsrolle zur Kupplungswelle koaxial ausgerichtet ist, wird die letztere durch die Federmittel axial vorgeschoben und mit der Antriebsrolle gekuppelt. Durch die Kupplung zwischen Antriebswelle und Transportrolle ist die Kassette gleichzeitig gegen eine Bewegung in Ausschieberichtung gesichert, so daß zusätzliche Arretierungs- oder Fixierungseinrichtungen nicht vorgesehen zu sein brauchen. Um die Kassette entnehmen zu können, wird mit Hilfe der zusätzlichen Betätigungsmittel die Antriebswelle in ihrer Entkupplungs-Stellung verschoben, womit gleichzeitig auch die Verriegelung der Kassette gelöst wird, so daß diese wieder ausgeschoben werden kann.The drive shaft is axially displaceable. In the decoupling position, it is retracted so far that the cassette can be inserted or pushed out unhindered. The cam surface formed at the leading end of the cassette causes the drive shaft to be automatically moved into its uncoupling position when the cassette is inserted. Only when the drive roller is aligned coaxially with the clutch shaft is the latter axially advanced by the spring means and coupled to the drive roller. Due to the coupling between the drive shaft and the transport roller, the cassette is at the same time secured against movement in the push-out direction, so that additional locking or fixing devices need not be provided. In order to be able to remove the cassette, the drive shaft is shifted into its uncoupling position with the aid of the additional actuating means, which also means the locking the cassette is released so that it can be pushed out again.
Die erfindungsgemäß vorgesehene Rampenfläche ist konstruktiv sehr einfach und läßt sich ohne weiteres bei Kassetten von im übrigen herkömmlicher Form anbringen, so daß derartig ausgebildete Kassetten auch ohne weiteres im Zusammenhang mit bekannten Kassettengeräten verwendbar sind.The ramp surface provided according to the invention is structurally very simple and can easily be attached to cassettes of otherwise conventional shape, so that cassettes designed in this way can also be used without problems in connection with known cassette devices.
In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß die Kassette und das Aufnahmefach mit zusammenwirkenden Führungseinrichtungen zum Führen der Kassette in Ein- und Ausschieberichtung versehen sind. Diese gewährleisten eine exakte Führung der Kassette, so daß beim Auflaufen der Rampenfläche gegen das Kupplungsende der Antriebswelle die Kassette nicht ausweichen kann; andererseits stellen die Führungseinrichtungen eine genaue Ausrichtung der Transportrolle zur Antriebswelle sicher.In a further embodiment of the invention, it is provided that the cassette and the receiving compartment are provided with cooperating guide devices for guiding the cassette in the push-in and push-out directions. These ensure an exact guidance of the cassette, so that the cassette cannot deflect when the ramp surface hits the coupling end of the drive shaft; on the other hand, the guide devices ensure precise alignment of the transport roller with the drive shaft.
In weiterer Ausgestaltung der Erfindung ragt die Antriebswelle durch eine Durchtrittsöffnung in einer Begrenzungswand des Aufnahmefaches hindurch und ist in einem auf der Rückseite dieser Begrenzungswand angeordneten Lagerbock axial verschiebbar gelagert; sie trägt einen in der Kupplungsstellung gegen die Rückseite dieser Begrenzungswand anliegenden Flansch, welcher demnach die Kupplungsstellung definiert. Zwischen diesem Flansch und einer Wand des Lagerbockes ist eine die Antriebswelle umgebende, diese in Richtung zur Kupplungsstellung belastende Druckfeder angeordnet.In a further embodiment of the invention, the drive shaft protrudes through a through opening in a boundary wall of the receiving compartment and is axially displaceably mounted in a bearing block arranged on the rear side of this boundary wall; it carries a flange in the coupling position against the back of this boundary wall, which therefore defines the coupling position. Arranged between this flange and a wall of the bearing block is a compression spring which surrounds the drive shaft and loads it in the direction of the coupling position.
In weiterer Ausgestaltung ist vorgesehen, daß an dem dem Kupplungsende der Antriebswelle abgewandten Teil derselben ein Betätigungshebel zur axialen Verschiebung der Antriebswelle angreift; dieser dient insbesondere zur Entkupplung der Transportrolle von der Antriebswelle und zur Entriegelung der Kassette, wie weiter vorne schon beschrieben wurde. Der Betätigungshebel ist in einer Ausgestaltung der Erfindung durch einen quer zur Antriebswellenachse schwenkbaren Schwenkhebel gebildet; dieser trägt einen Betätigungskeil, der mit einer an der Antriebswelle angeordneten Keilanordnung zusammenwirkt, wie anhand eines Ausführungsbeispieles genauer beschrieben wird.In a further embodiment it is provided that on the part of the drive shaft facing away from the coupling end there is an actuating lever for the axial displacement of the drive shaft attacks; this is used in particular to decouple the transport roller from the drive shaft and to unlock the cassette, as has already been described above. In one embodiment of the invention, the actuating lever is formed by a pivoting lever which can be pivoted transversely to the drive shaft axis; this carries an actuating wedge which interacts with a wedge arrangement arranged on the drive shaft, as will be described in more detail using an exemplary embodiment.
In weiterer Ausgestaltung der Erfindung ist auf der dem Aufnahmefach zugewandten Seite der Begrenzungswand ein zur Antriebswelle koaxiales Antriebsritzel gelagert, welches eine zum Querschnittsprofil des Kupplungsendes dieser Antriebswelle komplementäre zentrale Ausnehmung aufweist; diese erlaubt einen Durchtritt und eine axiale Verschiebung der Antriebswelle und bewirkt gleichzeitig die Drehkupplung zwischen Antriebsritzel und Antriebswelle. Das Antriebsritzel selbst ist in beliebiger Weise mit einem Antriebsmotor verbunden.In a further embodiment of the invention, a drive pinion coaxial with the drive shaft is mounted on the side of the boundary wall facing the receiving compartment and has a central recess complementary to the cross-sectional profile of the coupling end of this drive shaft; this permits passage and axial displacement of the drive shaft and at the same time effects the rotary coupling between the drive pinion and the drive shaft. The drive pinion itself is connected to a drive motor in any way.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und im folgenden näher beschrieben. Es zeigen:
- Fig. 1
- in einer perspektivischen, fragmentarischen Darstellung eine Kassette sowie ein zur Aufnahme dieser Kassette bestimmtes Aufnahmefach;
- Fig. 2
- einen Schnitt entsprechend der Linie II - II in Fig. 1;
- Fig 3
- eine Darstellung gemäß
Figur 2, wobei die Antriebswelle ihre Entkupplungsstellung einnimmt; - Fig. 4
- eine Ansicht des Betätigungshebels zur Verschiebung der Antriebswelle in Richtung des Pfeiles IV in Fig. 1.
- Fig. 1
- in a perspective, fragmentary representation, a cassette and a receiving compartment intended for receiving this cassette;
- Fig. 2
- a section along the line II - II in Fig. 1;
- Fig. 3
- a representation according to Figure 2, wherein the drive shaft assumes its decoupling position;
- Fig. 4
- a view of the operating lever for moving the drive shaft in the direction of arrow IV in Fig. 1st
Die in Fig. 1 dargestellte Bandkassette 2 hat eine im wesentlichen rechteckige, flache Form. Innerhalb der Kassette 2 ist eine Transportrolle 4 drehbar gelagert, welche ein in der Kassette 2 befindliches Band, beispielsweise ein Farbband, transportiert. Die Transportrolle 4 ist mit einer axialen Kupplungsausnehmung 6 versehen, die blind oder durchgehend ausgebildet sein kann. Die Kassette 2 kann in Richtung des Doppelpfeils 8 in das Aufnahmefach 10 eines Bandgerätes eingeführt oder ausgeschoben werden. Zur exakten Führung der Kassette 2 im Aufnahmefach 10 sind an den langen Seitenkanten 12 der Kassette 2 jeweils Führungsstege 14 ausgebildet; diese greifen in Führungsnuten 16 ein, die in den Seitenkanten 12 entsprechenden Seitenwänden 18 des Aufnahmefaches 10 ausgebildet sind.The
Durch die untere Begrenzungswand 20 des Aufnahmefaches 10 ragt eine Antriebswelle 22 hindurch. Diese ist zwischen der in Fig. 1 dargestellten, vollständig ausgefahrenen Kupplungsstellung und einer zurückgezogenen Entkupplungsstellung in Richtung des Doppelpfeiles 24 axial verschiebbar. Der in Fig. 1 sichtbare Teil der Antriebswelle 22 ist das Kupplungsende 26, welches im Querschnitt etwa kreuzförmig profiliert ist. Der Querschnitt des Kupplungsendes ist komplementär zum Querschnitt der Kupplungsausnehmung 6 der Transportrolle 4. Das Kupplungsende 26 kann demnach formschlüssig mit der Transportrolle 4 gekuppelt werden.A
An der voreilenden kurzen Seitenkante 28 der Kassette 2 ist eine Rampenfläche 30 ausgebildet, die beim Einschieben der Kassette 2 in das Aufnahmefach 10 gegen die Antriebswelle 22 anläuft und diese nach unten drückt, so daß sie ein Einschieben der Kassette 2 nicht behindert. Bei der weiteren Einschiebebewegung der Kassette 2 gleitet das Kupplungsende auf der Unterseite der Kassette 2 entlang, bis es in koaxiale Ausrichtung mit der Transportrolle 4 kommt, so daß das Kupplungsende 26 in die Kupplungsausnehmung 6 einrasten kann. Um ein Einrasten auch bei verdrehter Stellung des Kupplungsendes 26 gegenüber der Kupplungsausnehmung 6 zu erleichtern, kann das Kupplungsende 26 und/oder die Kupplungsausnehmung 6 in bekannter Weise angefast sein.On the leading
Nach dem Einrasten des Kupplungsendes 26 in die Kupplungsausnehmung 6 ist die Kassette 2 auch gegen Ausschieben gesichert. Um die Kassette 2 aus dem Aufnahmefach 10 entnehmen zu können, ist ein Betätigungshebel 32 vorgesehen, welcher in Richtung des Doppelpfeiles 34 um einen Gelenkpunkt 36 schwenkbar gelagert ist. Beim Einschwenken des Betätigungshebels 32 aus der dargestellten Stellung wird die Antriebswelle 22 aus ihrer dargestellten Kupplungsstellung in die zurückgezogene Entkupplungsstellung verschoben, wie anhand der Figuren 2 bis 4 erläutert wird.After the
Fig. 1 zeigt außerdem ein zur Antriebswelle 22 koaxiales Antriebsritzel 38, welches auf der Begrenzungswand 20 drehbar gelagert ist. Das Antriebsritzel weist eine zum kreuzförmigen Querschnittsprofil des Kupplungsendes 26 komplementäre zentrale Ausnehmung auf, die den Durchtritt und die axiale Bewegung des Kupplungsendes 26 erlaubt und eine Drehkupplung zwischen dem Antriebsritzel 38 und der Antriebswelle bewirkt. Das Antriebsritzel 38 ist in herkömmlicher und deshalb nicht näher dargestellter Weise mit einem Antriebsmotor verbunden.1 also shows a
Die Figuren 2 und 3 zeigen jeweils die Antriebswelle 22, deren profiliertes Kupplungsende 26 durch eine in der Begrenzungswand 20 ausgebildete Durchtrittsöffnung 40 hindurchragt. Ein auf der Rückseite der Begrenzungswand 20 angeordneter Lagerbock 42 dient zur axial verschiebbaren Lagerung der Antriebswelle 22. Die Antriebswelle 22 trägt in dem Bereich, in welchem das profilierte Kupplungsende 26 in den Schaftteil der Antriebswelle übergeht, einen Flansch 44, welcher bei der Kupplungsstellung der Antriebswelle (siehe Fig. 2) gegen die Begrenzungswand 20 anliegt und so die Kupplungsstellung definiert. Zwischen dem Flansch 44 und der unteren Wand des Lagerbockes 42 ist eine Druckfeder 46 angeordnet, die die Antriebswelle 22 stets in ihre Kupplungsstellung zu schieben versucht.FIGS. 2 and 3 each show the
Das dem Kupplungsende 26 abgewandte Ende der Antriebswelle 22 ragt über den Lagerbock 42 hinaus. Dieses Ende trägt einen Führungsblock 48 mit einer zur Achse der Antriebswelle 22 geneigten Führungsfläche 50.The end of the
Der Betätigungshebel 32 trägt einen Betätigungskeil 52, dessen Keilflächen 54 bzw. 56 mit der Führungsfläche 50 bzw. der Unterseite des Lagerbockes 42 zusammenwirken. Bei einer Verschiebung des Betätigungskeiles 52 in Richtung des Pfeiles 58 infolge einer Betätigung des Betätigungshebels 32 wird der Führungsblock 48 durch die Keilwirkung nach unten gedrückt, bis er die in Figur 3 dargestellte Stellung einnimmt. Diese Stellung entspricht der Entkupplungsstellung der Antriebswelle 22, bei welcher das Kupplungsende 26 aus der Kupplungsausnehmung 6 der Kassette 2 zurückgezogen ist.The actuating
Fig. 4 zeigt den Betätigungshebel 32 in einer mit ganzen Linien dargestellten Ruhestellung und einer strichpunktiert dargestellten Betätigungsstellung. Der Betätigungskeil 52 besteht im wesentlichen aus zwei kreisbogenförmig gebogenen, parallelen Wänden 60, 62, deren Mittelpunkt jeweils im Lager 36 liegt. Die obere und untere Kante der beiden Wände 60, 62 bilden jeweils die Keilflächen 56 bzw. 54. Die beiden Wände 60, 62 umfassen den Führungsblock 48. Der Führungsblock 48 hat an sich einen kreisförmigen Querschnitt, wie Fig. 4 erkennen läßt; im Bereich oberhalb der Führungsfläche 50 ist er jedoch jeweils so abgeflacht, daß sich die den Betätigungskeil 50 bildenden Wände 60, 62 an den Führungsblock 48 anschmiegen.Fig. 4 shows the operating
Die Antriebswelle 22 ist gegenüber dem Führungsblock 48 verdrehbar. Der Drehantrieb der Antriebswelle 22 erfolgt über das Antriebsritzel 38, wie anhand der Fig. 1 bereits erläutert wurde.The
Claims (10)
- A combination of a drive arrangement for a ribbon cassette, insertable in the cassette receiving compartment of a printer or typewriter, with a ribbon cassette, including a transport roll arranged inside the cassette which is mechanically drivingly couplable with the coupling end of a drive shaft which is co-axial with the transport roll when the cassette is inserted, characterized in that the drive shaft (22) is axially shiftable between a coupled position and a decoupled position at which it is backwardly spaced relative to the coupled position against the force of spring means (46), that a cam surface (30) is formed on the forward end of the cassette (2) which is inserted perpendicular to the transport roll axis, which cam surface, as a result of the insertion movement of the cassette (2), runs against the drive shaft (22) and shifts it into its decoupled position, and that the drive shaft (22) has additional actuating means (36) associated with it for moving the drive shaft (22) to its decoupled position.
- A combination according to claim 1 further characterized in that the cam surface is formed as a ramp surface (30) which extends in the insertion direction of the cassette (2) from the cassette upper surface rearwardly to the cassette lower surface.
- A combination according to claim 1 or 2 further characterized in that the cassette (2) and the receiving compartment (10) are provided with cooperating guide arrangements (14, 16) for guiding the cassette in the insertion and ejection direction.
- A combination according to one of claims 1 to 3 further characterized in that the drive shaft (22) has, in the area of its coupling end (26), a cross-sectional profile which is complementary to an axially extending coupling recess (6) formed in the transport roll (4).
- A combination according to one of claims 3 and 4 for a cassette with an essentially rectangular periphery, further characterized in that cassette guide ribs (14) are arranged along the longitudinal side edges (12) of the cassette and that guide grooves (16) are provided on the side walls (18) of the receiving compartment (10) corresponding to the side edges (12), and that a ramp surface (30) is arranged on one (28) of the short side edges of the cassette.
- A combination according to one of claims 1 to 5 further characterized in that the drive shaft (22) extends through and beyond a passage opening (40) in one boundary wall (20) of the receiving compartment (10) and is axially shiftably supported by a bearing block (42) arranged on the rear side of the aforementioned boundary wall (20).
- A combination according to claim 6, further characterized in that the drive shaft (22) carries a flange (44) which engages the rear side of the boundary wall (20) in the coupling position, and that, between the flange (44) and a wall of the bearing block (42), there is a compression spring (46) which surrounds the drive shaft (22).
- A combination according to one of claims 6 and 7, further characterized in that, on the portion of the drive shaft (22) opposite from its coupling end (26), the drive shaft engages with an actuating lever (32) for axially shifting the drive shaft (22).
- A combination according to claim 8, further characterized in that the drive shaft (22) projects beyond the bearing block (42) with its portion which is opposite the coupling end (26) and that the drive shaft on this portion carries a guide block (48) rotatable relative to the drive shaft and having a guide surface (50) inclined relative to the drive shaft axis, and that the actuating lever (32) is formed as a pivotal lever pivoted perpendicular to the drive shaft axis and engaging with an actuating wedge (52) between the inclined guide surface (50) and an opposite surface formed on the bearing block (42).
- A combination according to one of claims 6 to 9, further characterized in that a drive pinion (38) is supported on the side of the boundary wall (20) turned toward the receiving compartment (10), said drive pinion (38) being co-axial to the drive shaft (22) and having a central recess, complementary to the cross-sectional profile of the coupling end (26) of the drive shaft (22), which permits the drive shaft (22) to pass through it and move axially and which effects a rotatable coupling between the drive pinion (38) and the drive shaft (22).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3638344 | 1986-11-10 | ||
| DE3638344A DE3638344C1 (en) | 1986-11-10 | 1986-11-10 | Drive device for a ribbon cassette |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0267480A2 EP0267480A2 (en) | 1988-05-18 |
| EP0267480A3 EP0267480A3 (en) | 1989-03-22 |
| EP0267480B1 true EP0267480B1 (en) | 1992-04-29 |
Family
ID=6313610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87115670A Expired - Lifetime EP0267480B1 (en) | 1986-11-10 | 1987-10-26 | Ink ribbon cartridge drive mechanism and cooperating ink ribbon cartridge |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4822189A (en) |
| EP (1) | EP0267480B1 (en) |
| DE (2) | DE3638344C1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5238314A (en) * | 1990-07-13 | 1993-08-24 | Tokyo Electric Co., Ltd. | Transfer printer with ribbon lock |
| US5921687A (en) * | 1991-05-24 | 1999-07-13 | Mitsubishi Denki Kabushiki Kaisha | Printing apparatus |
| JPH09240090A (en) * | 1996-03-12 | 1997-09-16 | Brother Ind Ltd | Printer, recorder and ribbon cassette |
| JP4291778B2 (en) * | 2002-12-24 | 2009-07-08 | ダイモ | Printing device and cassette |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2879341A (en) * | 1954-05-06 | 1959-03-24 | Ford Motor Co | Tape recorder and player |
| US3401899A (en) * | 1965-12-30 | 1968-09-17 | Columbia Broadcasting Syst Inc | Cartridge and cartridge carrier |
| US3514050A (en) * | 1968-02-26 | 1970-05-26 | Matsushita Electric Ind Co Ltd | Fast forwarding and rewinding mechanism in tape recorder of magazine type |
| FR2050895A5 (en) * | 1969-06-27 | 1971-04-02 | Radiotechnique Compelec | |
| US3643779A (en) * | 1970-12-14 | 1972-02-22 | Scm Corp | Ribbon mechanism for cartridge supported ribbons |
| US3813057A (en) * | 1971-12-01 | 1974-05-28 | Matsushita Electric Ind Co Ltd | Reel mount elevating mechanism |
| US3804227A (en) * | 1972-05-03 | 1974-04-16 | Scm Corp | Typewriter ribbon cartridge |
| US3830351A (en) * | 1972-09-13 | 1974-08-20 | Scm Corp | Typewriter ribbon cartridge for endless loop ribbon |
| US3945040A (en) * | 1974-02-15 | 1976-03-16 | Staar Development Company, S.A. | Push-push locking and release mechanism for tape cartridge players |
| US3967790A (en) * | 1974-03-07 | 1976-07-06 | Qume Corporation | Cartridge drive apparatus |
| JPS51127824A (en) * | 1975-04-28 | 1976-11-08 | Dezain Fuoo Asoshieetsu | Printer |
| US3993182A (en) * | 1975-10-14 | 1976-11-23 | Trw Inc. | Endless inked ribbon cartridge |
| GB1556666A (en) * | 1976-06-23 | 1979-11-28 | Scm Corp | Type writer ribboncartridges |
| US4350451A (en) * | 1980-02-14 | 1982-09-21 | General Electric Company | Slidably positionable cartridge having skewed ribbon feed |
| DE3015726C2 (en) * | 1980-04-24 | 1985-07-11 | Olympia Werke Ag, 2940 Wilhelmshaven | Ribbon cassette with a continuous fabric tape for a typewriter or similar office machine |
| JPS61125877A (en) * | 1984-11-26 | 1986-06-13 | Matsushita Electric Ind Co Ltd | Ribbon end detector for thermal transfer printer |
-
1986
- 1986-11-10 DE DE3638344A patent/DE3638344C1/en not_active Expired
-
1987
- 1987-10-22 US US07/112,367 patent/US4822189A/en not_active Expired - Fee Related
- 1987-10-26 EP EP87115670A patent/EP0267480B1/en not_active Expired - Lifetime
- 1987-10-26 DE DE8787115670T patent/DE3778648D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0267480A3 (en) | 1989-03-22 |
| EP0267480A2 (en) | 1988-05-18 |
| DE3778648D1 (en) | 1992-06-04 |
| US4822189A (en) | 1989-04-18 |
| DE3638344C1 (en) | 1988-06-01 |
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