EP0477292A1 - A gear-wheel drive for a cleaning cassette for use in cassette tape recorders - Google Patents
A gear-wheel drive for a cleaning cassette for use in cassette tape recordersInfo
- Publication number
- EP0477292A1 EP0477292A1 EP90910601A EP90910601A EP0477292A1 EP 0477292 A1 EP0477292 A1 EP 0477292A1 EP 90910601 A EP90910601 A EP 90910601A EP 90910601 A EP90910601 A EP 90910601A EP 0477292 A1 EP0477292 A1 EP 0477292A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cassette
- cleaning
- driven gear
- engagement
- coil drive
- 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.)
- Withdrawn
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 42
- 230000033001 locomotion Effects 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 abstract description 4
- 230000013011 mating Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/41—Cleaning of heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/04—Magazines; Cassettes for webs or filaments
- G11B23/049—Cassettes for special applications not otherwise provided for
Abstract
Une cassette de nettoyage destinée à des enregistreurs de cassettes comprend un élément de nettoyage lequel, lorsque l'on place la cassette dans ledit enregistreur de cassette, est amené en contact avec sa tête d'enregistrement/reproduction, et lequel, par l'intermédiaire d'un dispositif de transmission, est relié à une tige d'entraînement effectif de bobines, se trouvant dans ledit enregistreur de cassettes, de manière à donner audit élément de nettoyage, par la rotation de ladite tige d'entraînement de bobine, un mouvement de balayage effectuant un va-et-vient sur la tête magnétique. Ledit dispositif de transmission comprend deux roues d'engrenage entraînées (14, 16) s'engageant l'une dans l'autre, dont une porte la tête excentrique (8) laquelle, au moyen d'un bras de pivot (5), donne audit élément de nettoyage (1) ledit mouvement de balayage à va-et-vient. Lesdites roues d'engrenage entraînées (14, 16) sont agencées de manière à être applicables dans une connexion d'accouplement unidirectionnel, avec des premier et second pignons (12, 13), montés respectivement et individuellement pour pouvoir se déplacer axialement sur un moyeu fileté (10, 11) en contact avec la tige d'entraînement de bobines, permettant ainsi le déplacement entre des positions dans lesquelles les pignons (12, 13) s'engagent dans ladite roue d'engrenage entraînée et quittent cette dernière. Quel que soit celui desdits moyeux (10, 11) qui est relié à ladite tige principale d'entraînement effectif, l'on obtient une fonction de nettoyage correct sans établir, par l'intermédiaire de ladite cassette de nettoyage, aucune connexion d'entraînement audit second moyeu.A cleaning cassette for cassette recorders comprises a cleaning member which, when placing the cassette in said cassette recorder, is brought into contact with its recording / reproducing head, and which, through of a transmission device, is connected to an effective reel driving rod, located in said cassette recorder, so as to give said cleaning element, by the rotation of said reel driving rod, a movement sweeping back and forth on the magnetic head. Said transmission device comprises two driven gear wheels (14, 16) engaging one in the other, one of which carries the eccentric head (8) which, by means of a pivot arm (5), gives said cleaning element (1) said reciprocating sweeping motion. Said driven gear wheels (14, 16) are arranged so as to be applicable in a one-way mating connection, with first and second pinions (12, 13), respectively and individually mounted to be able to move axially on a hub. thread (10, 11) in contact with the coil drive rod, thereby allowing movement between positions in which the pinions (12, 13) engage with and leave said driven gear wheel. Whichever of said hubs (10, 11) is connected to said effective main drive rod, a correct cleaning function is obtained without establishing, through said cleaning cassette, any drive connection. said second hub.
Description
A gear-wheel drive for a cleaning cassette for use in cassette tape recorders.
The present invention relates to a cleaning cassette for cassette tape recorders comprising a cleaning member which upon placing the cassette in the tape recorder is brought into engagement with its recording/reproducing head and which is subjected to a reciprocating cleaning movement across the recording head by means of a pivot arm, one end of which is pivotal about a stationary axis while the other end is connected with the cleaning member, said pivot arm having a slot engaging an eccentric head connected through a transmission device with hub means for engagement with respective ones of the coil drive shafts of the tape recorder in such a manner that the cleaning member by rotation of an arbitrary one of the coil drive shafts of the tape recorder is subjected to said cleaning movement, the transmission device comprising two mutually engaging driven gear-wheels one of which carries the eccentric head.
From DK patent No. 151,656 such a cleaning cassette is known in which the cleaning member is connected to both coil drives of the cassette by means of a gear-wheel arrangement including pinions communicating with respective coil drives and engaging an idle wheel connected with an eccentric cam device actuating a pivot arm with which the cleaning member is connected.
US patent No. 4 716 485 deals with a gear-wheel coupling with two driven gear-wheels, providing a rotational direction for the gear-wheel that is in engagement with the pivot arm, irrespective of which of the coil drive shafts is operable during the playing function in a cassette tape recorder.
The above designs provide for obtaining a correct cleaning function irrespective of the orientation of the cleaning cassette when positioned in the tape recorder, but the transmission devices suffer from the drawback that they establish a direct driving connection from the first hub means to the second hub means of the cassette, thereby causing the motor of the tape recorder to perform, through the active coil drive shaft, not only the necessary motive power for the cleaning cassette but also a sufficient motive power for the indispensable co-rotation of the second coil drive shaft of the tape recorder and the transmission devices connected therewith.
In a device disclosed in EP patent No. 0,144,364 this drawback has been eliminated in that the reciprocating movement of the cleaning member is provided by means of a spring-biassed pivot arm actuated by a cam device connected with one of the hub means, while a second pivot arm is positioned between a holder for the cleaning member and a cam device connected with the second hub means in such a manner that the second pivot arm which is not directly connected with the holder of the cleaning member by engagement between the second hub means and the effective coil drive shaft of the tape recorder may impart a forward movement to the cleaning member against the spring bias force exerted on the first pivot arm, while the return movement is solely effected by the spring bias force.
Thereby a direct drive connection from the first to the second hub means of the cassette is avoided, but the design of the transmission device with two separate pivot arms in connection with the respective coil drives and a spring bias force acting solely on one of the pivot arms involves a comparatively work consuming mounting and thus also increases the production price of the cleaning cassette.
DK patent application No. 3820/88 likewise deals with a cleaning cassette eliminating the co-rotation of the second coil drive shaft. This is obtained in that a first and a second pinion communicating with a respective one of said hub means are connected directly or through an idle wheel, resp., with a respective one of two transfer gear-wheels independently rotatable about a common axis and which via a respective one-way coupling device with the same coupling direction are connected with the same shaft pin rotatable about the common axis and carrying the eccentric head.
The mechanical mounting of this cassette is also comparatively work-consuming, because gear-wheels, oneway couplings and pivot arm being superposed on three levels.
The object of the invention is to provide a cleaning cassette of the type concerned in which the functional advantage of the latter of the above mentioned known designs is maintained concurrently with obtaining a simpler mounting and a more sturdy design of the transmission device, thereby further compensating more easily for productional tolerances.
This is obtained according to the invention in that the driven gear-wheels are arranged so as to be used in a one-way coupling connection with a first and a second pinion, resp., said one-way coupling being provided in that the pinions are individually mounted axially displaceable on a threaded hub means in engagement with a coil drive shaft, thereby allowing displacement between positions in which the pinion is in engagement and out of engagement, resp., with the actual driven gear-wheel.
The invention will now be explained in more detail with reference to the accompanying schematical drawings, in which
Fig. 1 is a plane view of a cleaning member with an associated transmission device in an embodiment of the cleaning cassette according to the invention,
Fig. 2 is a sectional view along the lines II-II in Fig. 1,
Fig. 3 is a threaded hub means according to the invention,
Fig. 4 is a plane view of a pinion in Fig. 2, and
Fig. 5 is a sectional view of the pinion along the line V-V in Fig. 4.
In the illustrated embodiment a cleaning member 1 is mounted in a holder 2 which in a manner not shown, e.g. by guide tracks in the cassette walls is controlled to effect reciprocating movement in the cleaning cassette in the direction shown by arrows 3. This movement causes the cleaning member, e.g. formed as a felt pad moistened with cleaning liquid, to effect a sweeping movement across the recording/reproducing head not shown of the tape recorder and on which the cleaning member is kept abutting by a pressure spring 4.
Holder 2 is connected with the free end of a pivot arm, 5 the opposite end of which is pivotally journalled on a pivot pin 6 secured on the cassette. The pivot arm 5 is provided with a slot 7 engaging an eccentric head 8 supported on a driven gear-wheel 14 that is in firm engagement with the second driven gear-wheel 16.
For the purpose of engagement with the coil drive shafts, not shown, of the tape recorder the cassette is provided with two hub means 10 and 11 corresponding to the coil drive shafts in a general tape cassette. Each of the hub means 10 and 11 is provided with an external thread for engagement with pins located internally of the pinions 12 and 13 for axial displacement thereof on hub means 10 and 11, between positions in which pinions 12 and 13 engage or disengage, resp., the driven gear-wheels 14 and 16.
When a hub means 10 or 11 upon placing the cassette in the tape recorder is made to communicate with the effective coil drive shaft thereof, the rotation of hub means 10 or 11 in the usual direction of rotation, shown by arrow 18 or 19, will displace pinion 12 or 13 axially to engage the driven gearwheel 14 or 16, thereby also making eccentric head 8 to rotate so that pivot arm 5 is made to effect a reciprocating pivoting movement about pivot pin 6, thereby actuating cleaning member holder 2 to perform the reciprocating sweeping movement illustrated by arrows 3. The other hub means 11 or 10 is connected to the non-effective coil drive shaft of the tape recorder in such a manner that hub means 11 or 10 stands still. As the corresponding pinion 13 or
12 by the driven gear-wheel 15 or 14 is rotated in the direction of arrow 19 or 18, said pinion 12 or
13 is displaced axially out of engagement with the associated driven gear wheel 16 or 14 until it gets stopped by abutting on the cassette wall or, in the illustrated embodiment, on cam 20 protruding downwards therefrom.
This provides for obtaining that solely the hub means which is in engagement with an effective coil drive shaft in the tape recorder is made to rotate without causing any co-rotation of the hub means that is not connected to an effective coil drive shaft. In fact, no driving connection is established between the hub means through the cleaning cassette.
Claims
1. A cleaning cassette for cassette tape recorders comprising a cleaning member (1) which upon placing the cassette in the tape recorder is brought into engagement with its recording/reproducing head and which is subjected to a reciprocating cleaning movement across the recording head by means of a pivot arm (5) one end of which is pivotal about a stationary axis (6) while the other end is connected with the cleaning member (1), said pivot arm (5) having a slot (7) engaging an eccentric head (8) connected through a transmission device with hub means (10, 11) for engagement with respective ones of the coil drive shafts of the tape recorder in such a manner that the cleaning member (1) by rotation of an arbitrary one of the coil drive shafts of the tape recorder is subjected to said cleaning movement, the transmision device including two mutually engaging driven gear-wheels (14, 16) one of which carries the eccentric head (8), characterized in that the driven gear-wheels (14, 16) are arranged so as to be used in a one-way coupling connection with a first and a second pinion (12, 13), resp., said one-way coupling being provided in that the pinions (12, 13) are individually mounted axially displaceable on a threaded hub means (10, 11) in engagement with a coil drive shaft, thereby allowing displacement between positions in which the pinion (12, 13) is in engagement and out of engagement, resp., with the actual driven gear-wheel (14, 16).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK2947/89 | 1989-06-15 | ||
| DK294789A DK163462C (en) | 1989-06-15 | 1989-06-15 | GEAR WHEELS FOR CLEANING CASSETTE FOR CASSETTE TAPE RECORDERS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0477292A1 true EP0477292A1 (en) | 1992-04-01 |
Family
ID=8117458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90910601A Withdrawn EP0477292A1 (en) | 1989-06-15 | 1990-06-14 | A gear-wheel drive for a cleaning cassette for use in cassette tape recorders |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0477292A1 (en) |
| JP (1) | JPH04506128A (en) |
| KR (1) | KR920702788A (en) |
| AU (1) | AU635548B2 (en) |
| CA (1) | CA2056615A1 (en) |
| DE (1) | DE9090075U1 (en) |
| DK (1) | DK163462C (en) |
| FI (1) | FI915898A0 (en) |
| WO (1) | WO1990016064A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4716485A (en) * | 1985-03-29 | 1987-12-29 | Recoton Corporation | Cartridge-shaped cleaning device with a rotable cleaning assembly |
| CH679814A5 (en) * | 1987-09-21 | 1992-04-15 | Manfred Baumann | |
| DK162665C (en) * | 1988-07-08 | 1992-04-13 | Am Kemi As | CLEANING CASSETTE FOR TAPE RECORDERS |
-
1989
- 1989-06-15 DK DK294789A patent/DK163462C/en not_active IP Right Cessation
-
1990
- 1990-06-14 KR KR1019910701865A patent/KR920702788A/en not_active Application Discontinuation
- 1990-06-14 AU AU59645/90A patent/AU635548B2/en not_active Expired - Fee Related
- 1990-06-14 WO PCT/DK1990/000150 patent/WO1990016064A1/en not_active Application Discontinuation
- 1990-06-14 JP JP2509934A patent/JPH04506128A/en active Pending
- 1990-06-14 DE DE9090075U patent/DE9090075U1/de not_active Expired - Lifetime
- 1990-06-14 EP EP90910601A patent/EP0477292A1/en not_active Withdrawn
- 1990-06-14 CA CA002056615A patent/CA2056615A1/en not_active Abandoned
-
1991
- 1991-12-13 FI FI915898A patent/FI915898A0/en not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9016064A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1990016064A1 (en) | 1990-12-27 |
| DK163462B (en) | 1992-03-02 |
| AU5964590A (en) | 1991-01-08 |
| DK294789A (en) | 1990-12-16 |
| DE9090075U1 (en) | 1992-01-30 |
| KR920702788A (en) | 1992-10-06 |
| DK294789D0 (en) | 1989-06-15 |
| CA2056615A1 (en) | 1990-12-16 |
| AU635548B2 (en) | 1993-03-25 |
| FI915898A0 (en) | 1991-12-13 |
| DK163462C (en) | 1992-07-20 |
| JPH04506128A (en) | 1992-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4442468A (en) | Cassette cleaning device | |
| EP0477292A1 (en) | A gear-wheel drive for a cleaning cassette for use in cassette tape recorders | |
| US5243484A (en) | Cleaning cassette for cassette tape recorders | |
| JPH0660341A (en) | Head-drum cleaning device of magnetic record regenerator | |
| JPS6338451Y2 (en) | ||
| JPH0118919Y2 (en) | ||
| US6254024B1 (en) | Rotational load applying mechanism for a tape recorder | |
| JPH0198156A (en) | Reel driving device | |
| JPS639857Y2 (en) | ||
| JPH0225211Y2 (en) | ||
| KR940001748B1 (en) | Tape recorder reel driving device | |
| JPS6280233U (en) | ||
| CN2266605Y (en) | Device for preventing rotor from back turning on spinning hank reeling machine | |
| JPH0124749Y2 (en) | ||
| JPS6232365Y2 (en) | ||
| JPS6248035U (en) | ||
| JPS6039561Y2 (en) | rotary drive device | |
| SU773716A1 (en) | Tape-driving mechanism driving unit | |
| JPH0239325U (en) | ||
| JPS60175340U (en) | Tape recorder switching device | |
| PL132686B1 (en) | Braking unit,especially in tape recorders | |
| JPS636538U (en) | ||
| JPS6280224U (en) | ||
| JPH0310332U (en) | ||
| JPH0327976B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19910923 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE |
|
| 17Q | First examination report despatched |
Effective date: 19921014 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19930707 |