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

Definitions

• a gear-wheel drive for a cleaning cassette for use in cassette tape recorders is provided.
• 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.
• 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.
• 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.
• 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.
• 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
• Fig. 5 is a sectional view of the pinion along the line V-V in Fig. 4.
• 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.
• the cassette 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.
• hub means 10 or 11 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

Landscapes

• Accessory Devices And Overall Control Thereof (AREA)
• Impression-Transfer Materials And Handling Thereof (AREA)
• Transmission Devices (AREA)
• Mechanical Coupling Of Light Guides (AREA)
• Detergent Compositions (AREA)
• Automatic Tape Cassette Changers (AREA)
• Replacement Of Web Rolls (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8117458

Family Applications (1)

Country Status (9)

Family Cites Families (3)

• 1989
  • 1989-06-15 DK DK294789A patent/DK163462C/da not_active IP Right Cessation
• 1990
  • 1990-06-14 WO PCT/DK1990/000150 patent/WO1990016064A1/en not_active Application Discontinuation
  • 1990-06-14 DE DE9090075U patent/DE9090075U1/de not_active Expired - Lifetime
  • 1990-06-14 CA CA002056615A patent/CA2056615A1/en not_active Abandoned
  • 1990-06-14 KR KR1019910701865A patent/KR920702788A/ko not_active Application Discontinuation
  • 1990-06-14 AU AU59645/90A patent/AU635548B2/en not_active Expired - Fee Related
  • 1990-06-14 JP JP2509934A patent/JPH04506128A/ja active Pending
  • 1990-06-14 EP EP90910601A patent/EP0477292A1/en not_active Withdrawn
• 1991
  • 1991-12-13 FI FI915898A patent/FI915898A0/fi not_active Application Discontinuation

Non-Patent Citations (1)

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