Abstract: A cleaning cassette for cassette tape recorders comprises a cleaning member which engages the recording/reproducing head of the tape recorder upon placing the cassette in the recorder. Through a first and second transmission device the cleaning member is connected with an operative coil drive shaft in the tape recorder to impart to the cleaning member by the rotation of the coil drive shaft a reciprocating sweeping movement across the recording head. The first and second transmission devices each include a one-way coupling device connected with a common shaft pin carrying an eccentric head engaging a slot in a pivot arm whose free end is connected with the cleaning member. Each of the transmissions provides for a correct cleaning function irrespective of which of the two transmissions is connected with the operative coil drive shaft without establishing drive connection with the other transmission.

Abstract: A clean cassette for cassette tape recorders comprising a holder for a cleaning member, which holder is pivotally connected at one end with a spring-biased pivot arm. The opposite end of the spring-biased pivot arm engages a cam device which in the operative position of the cassette is engaged by one coil shaft of the tape recorder. The opposite end of the holder is intermittently engageable with a second pivot arm. The second pivot arm is influenced in the operative position by a second cam device engaged by the second coil shaft of the tape recorder. Upon actuation of the second coil shaft, an end of the second pivot arm moves the holder against the action of the spring bias of the first pivot arm.