Abstract: A rotary recording medium reproducing apparatus comprises a holding mechanism for clamping and holding a lid plate and a rotary recording medium when a case having a jacket accommodating therein the rotary recording medium and the lid plate for closing the jacket is inserted into the reproducing apparatus through an inserting opening, where the lid plate and the rotary recording medium thus clamped and held are recovered within an empty jacket inserted through the inserting opening, a control mechanism for putting the reproducing apparatus in a state possible or not to insert the case or the jacket into the reproducing apparatus through the inserting opening, a detection circuit for detecting whether the rotary recording medium exists within the reproducing apparatus, a single load/eject switch, and a control circuit for controlling the control mechanism by use of a detection output of the detection circuit and an output of the load/eject switch, so that a state possible for inserting the case into the reprod

Abstract: A signal pickup device in a rotary recording medium reproducing apparatus comprises a turntable placed thereon with a rotary recording medium recorded with an information signal as variations in geometrical configuration, for rotating the rotary recording medium, a reproducing stylus provided at a tip end of a cantilever, for making contact with and sliding against a recorded region of the rotary recording medium upon reproduction to reproduce the information signal, a resonator having a resonance frequency which varies in accordance with the above variations in geometrical configuration, and a conductive ribbon having one end connected to the reproducing stylus and the other end connected to the resonator to electrically connect an electrode of the reproducing stylus with the resonator, where the conductive ribbon is in a curved and bent state upon reproduction of the rotary recording medium.

Abstract: An apparatus for detecting position of a reproducing transducer in a rotary recording medium reproducing apparatus which reproduces an information signal recorded in a rotary recording medium by a reproducing transducer which is transferred towards the radial direction of the rotary recording medium, comprises a single photo-detector having a light-emitting element and a light-receiving element, provided in a manner so as to be transferred unitarily with the reproducing transducer, a light interrupting plate provided at a fixed part of the rotary recording medium reproducing apparatus, for operating together with the photo-detector, and a position detection signal producing circuit for producing a position detection output signal according to an output of said photo-detector, to indicate that the reproducing transducer has passed a position corresponding to the outermost peripheral position and the innermost peripheral position of the recorded region in the rotary recording medium.

Abstract: An apparatus for automatically reproducing recorded signals from a rotary recording medium, in accordance with the mode in which signals were recorded. The reproducing apparatus comprises a micro-computer which produces a two-bit mode control signal and a one-bit muting signal. The one-bit muting signal puts one of two processing circuits in a non-operational state, so that the other of the two processing circuits can perform the signal processing in accordance with the mode specified by the two-bit mode control signal. Four codes constituted by the two-bit mode control signal are commonly used to specify four reproducing modes of a video rotary recording medium and four reproducing modes of an audio rotary recording medium.

Abstract: A reproducing apparatus is capable of performing special reproduction of information signals recorded on a rotary recording medium. The information signals are recorded in either spiral track turns or concentric tracks. The reproducing apparatus comprises a detector for generating a rotation detection signal having a frequency which varies proportionally to the rotational speed of the rotary recording medium. A special signal generator generates a special reproduction synchronizing signal and a generator generates an external control signal based on a signal which is obtained by variably controlling the frequency of the special reproduction synchronizing signal. A manual switch varies the frequency of the special reproduction synchronizing signal by controlling the control signal generator responsive to an output code signal corresponding to a position of the manual switch.

Abstract: A high-speed search system in a rotary recording medium reproducing apparatus having a reproducing transducer including a reproducing element for reproducing recorded signals from a rotary recording medium in which an information signal and a chapter address signal including a program number of the information signal are recorded, and transferring mechanism for transferring the reproducing transducer along the radial direction of the rotary recording medium, comprises a designating circuit for designating a program number of a desired program which is to be reproduced, a reproducing circuit for reproducing a chapter address signal from a signal reproduced by the reproducing transducer; and a control circuit for comparing the designated program number with a program number of the reproduced chapter address signal and transferring the reproducing transducer at a high speed by the transferring mechanism towards a direction where the two program numbers coincide when the two program numbers differ, and controllin

Abstract: A case for a disc-shaped recording medium is used in a disc-shaped recording medium reproducing apparatus. The reproducing apparatus is provided with a turntable for rotating the disc-shaped recording medium, closing member locking mechanism provided at the innermost part of the disc-shaped recording medium reproducing apparatus, and N detection switches provided at the innermost part of the reproducing apparatus and disposed asymmetrically on the left and right sides with respect to a line which passes through the center of the turntable in the disc insertion direction. The case comprises a jacket for accommodating the disc-shaped recording medium, and a closing member for closing an opening of the jacket and being locked by the locking mechanism and confront the detection switches upon the disc-shaped recording medium being loaded into the reproducing apparatus.

Abstract: A state indicating device in a reproducing apparatus for reproducing a rotary recording medium recorded with signals which has been accommodated within a case, where the case has a space for accommodating the rotary recording medium, a jacket having an opening through which the rotary recording medium can enter or leave, and a lid plate inserted through the opening of the jacket to close the opening, and the reproducing apparatus has an inserting opening through which the case is inserted, a turntable for rotating the rotary recording medium, a lid plate locking mechanism and a rotary recording medium clamping mechanism respectively provided at the innermost part of the reproducing apparatus opposite to the inserting opening with respect to the turntable, a lowering and raising mechanism for lowering and raising the rotary recording medium between a position clamped by the clamping mechanism and a position on the turntable, reproducing device for reproducing recorded signals from the rotary recording medium,

Abstract: A rotary recording medium reproducing apparatus for reproducing a rotary recording medium in which an information signal consisting of a plurality of program contents and an address signal for discriminating a program number of the information signal are recorded, comprises a reproducing device for reproducing the information signal and the address signal from the rotary recording medium, a detection circuit for detecting the address signal from signals reproduced by the reproducing device, a setting circuit for setting a program number of a program which is to be reproduced after performing an automatic searching operation, a transferring device for transferring the reproducing means towards forward and backward directions on the rotary recording medium, and a comparator for comparing the program number set in the setting circuit with a program number of a program of the information signal being reproduced by the reproducing device, and producing and supplying a search signal to the transferring device so th