Dynamic magnetic information storage or retrieval – Head – Head accessory
Patent
1985-01-16
1987-06-02
Wolff, John H.
Dynamic magnetic information storage or retrieval
Head
Head accessory
360137, 15210R, G11B 541
Patent
active
046708081
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present relates to cleaning cassettes for use in a cassette tape recorders generally and more particularly, to cleaning cassettes having a cleaning member which undergoes movement during cleaning operations.
BACKGROUND OF THE INVENTION
From DE-A-1,937,152 and U.S. Pat. Nos. 3,955,214 and 4,149,206 cleaning cassettes of this kind are known, in which the drive means for the movable cleaning member, i.e. the pivot arm and the cam device, are brought into engagement with one of the coil shafts of the tape recorder introduced into the cassette casing in the operative position of the cassette. In non-reversing cassette tape recorders, in which only the shaft for the winding coil of a usual tape cassette is in drive connection with the motor of the tape recorder, the cleaning function with such cassettes can only be obtained by correct orientation of the cleaning cassette when in position in the cassette chamber of the tape recorder. For tape recorders having an automatic stop function erroneous positioning will cause stopping of the tape recorder and/or ejection of the cleaning cassette to the discomfort and irritation of the user.
From DK-A-4683/81 a cleaning cassette is known, in which this operational disadvantage is remedied by a double drive arrangement for the cleaning member in the form of a gear drive with two gears journalled in the cassette to enter into drive connection with respective ones of the coil shafts of the tape recorder in the operative position and an intermediate gear engaging both of said gears and being connected with an eccentric cam device acting on the pivot arm for the cleaning member.
Thereby, the operation is facilitated so that a correct cleaning function is obtained independent of the orientation of the cleaning cassette, when it is positioned in the tape recorder, this being obtained, however, at the expense of a more complicated and expensive construction which, moreover, as a result of the drive connection established through the gear drive has the disadvantage that the motor of the tape recorder shall operate through the driven shaft for the winding coil not only the drive arrangement in the cleaning cassette but also the shaft of the tape recorder for the feed or unwinding coil and the transmission members connected therewith. In case of excessive friction in the gear drive or the cleaning movement this may cause stopping of the tape recorder.
OBJECTS AND SUMMARY OF THE INVENTION
It is the object of the invention to remedy the operational disadvantages of non-reversing cleaning cassettes with a simpler and cheaper construction with which no drive connection from the driven to the non-driven coil shaft of the tape recorder is established in use of the cleaning cassette.
In order to achieve this object, a cleaning cassette according to the invention is characterized in that the holder for the cleaning member is pivotally connected with said pivot arm in one end, whereas in the other end it engages a further pivot arm which in said operative position is influencable by a second cam device engaging the other coil shaft of the tape recorder to perform a pivotal movement by rotation of said cam device, whereby the holder is caused to move against the spring-bias acting on the first pivot arm.
BRIEF DESCRIPTION OF THE DRAWING
The invention will be further explained with reference to the drawing which is a side view of a cleaning cassette constructed according to a preferred embodiment of the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The cleaning cassette according to a preferred embodiment of the present invention has a cassette casing 1 of the same shape and proportions as a usual tape cassette. In one longitudinal side 2 of the casing 1, openings 3, 4 and 5 are provided in a usual manner through which the recording/reproducing head, the capstan and the pinch roller of the tape recorder is brought into engagement with cleaning members in the cassette.
The cleaning member for the recording/reproducing head comprises a cleani
REFERENCES:
patent: 3761994 (1973-10-01), Becht
patent: 3955214 (1976-05-01), Post et al.
patent: 4141053 (1979-02-01), Kara
patent: 4149206 (1979-04-01), Loiselle
patent: 4272796 (1981-06-01), Van Kreuningen
patent: 4454551 (1984-06-01), Clausen et al.
AM/KEMI A/S
Wolff John H.
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