Tokyo Shibaura Denki Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Kaoru Morinaga

Yoshihiro Kotoda

Seiji Tomita

Takuro Ono

Noboru Aoyama

Hiroshi Kawakami

Takamasa Kurafuzi

Kazuo Takamori

Akira Seino

An optical disc player for playing optical discs includes a disc compartment for accommodating an optical disc, a disc holding mechanism for holding an optical disc accommodated in the disc compartment, a disc rotation drive mechanism for rotating the optical disc held by the disc holding mechanism, an optical pickup device which is radially movable in respect to the optical disc rotated by the disc rotation drive mechanism for optically tracing the optical disc and a pickup locking mechanism which is responsive to the disc holding mechanism for locking the optical pickup device during a non-operation of the tracing operation.

Optical disc player

An optical disc player for playing optical discs includes a disc compartment for accomodating an optical disc, a disc holding mechanism for holding an optical disc accomodated in the disc compartment, a disc rotation drive mechanism for rotating the optical disc held by the disc holding mechanism, an optical pickup device which is radially movable in respect to the optical disc rotated by the disc rotation drive mechanism for optically tracing the optical disc and a pickup locking mechanism which is responsive to the disc holding mechanism for locking the optical pickup device during a non-operation of the tracing operation.

An autochanger type disc player for playing compact audio discs includes a disc storage area able to store a plurality of closely spaced discs, a disc playing mechanism, and a mechanism for transferring a selected disc from the disc storage area to the disc playing mechanism. During transfer of the selected disc from the disc storage area to the disc playing mechanism, the selected disc passes through a disc inlet that includes a restraining member permitting only the selected disc to pass through to the disc playing mechanism and a buffer part preventing the recorded portion of the disc from contacting non-resilient components of the disc player.

Autochanger type disc player

A tape recorder has a forward/reverse switching mechanism for switching tape travel at normal speed in the forward and reverse directions. Tape guides are disposed at two sides of a recording/playback head of the tape recorder. In response to the switching operation of the forward/reverse switching mechanism, a tape guide drive mechanism is driven. When a tape is driven at normal speed in one of the forward or reverse directions, one of the tape guides which is located in the upstream side of the tape travel with respect to the recording/playback head guides the tape, while the other one of the tape guides does not guide the tape.

Cassette tape recorder

Tape recorder

A tape drive spindle for driving a reel hub rotatably mounted within a tape housing of a cartridge type tape. The tape drive spindle is provided with a base member, a spindle shaft member and a resilient joint member interposed between the base member and the spindle shaft member. The base member is adapted for rotation about an axis thereof by a driving source. The spindle shaft member is concentric with the base member and adapted to engage with the reel hub. The resilient joint member couples the spindle shaft member to the base member.

Tape drive spindle

A tape recorder has a forward/reverse switching mechanism for switching between forward travel and reverse travel at normal speed, and a track switching mechanism for supporting a recording/playback head to be pivotal between positions where the recording/playback head is aligned with tracks of the tape in forward travel and reverse travel at normal speed. In response to the switching operation of the forward/reverse switching mechanism, a control lever is pivoted in one direction by a cam portion of a gear to selectively engage projections with projections of a driving shaft to rotate it in different directions. The track switching mechanism is driven by the drive slider which is slid in different directions upon movement of the driving shaft.

A disc clamper includes a clamp member for holding a disc against a turntable and a support member for supporting the clamp member. The clamp member is provided with a permanent magnet, and the support member has a winding. The winding is coaxially arranged to the magnet. When a certain DC current is applied to the winding, the clamp member is subjected to an electromagnetic repelling force effected between the winding and the magnet. Then, the disc is fixed to the turntable by means of the electromagnetic repelling force, and the clamp member is mechanically free from the support member.

Disc player apparatus with an improved disc clamper

A disc rotating apparatus for use in a dic player. The disc rotating apparatus is provided with a turntable adapted for receiving a disc and a clamping mechanism for clamping the disc against the turntable in cooperation with the turntable. The disc clamping mechanism includes a plunger slidable along an axis of the plunger and rotatable about the same axis, a holder for holding the plunger and a magnetic propelling mechanism for propelling the plunger toward the disc received on the turntable. The magnetic propelling mechanism urges the plunger against the disc by means of magnetic force caused by a permanent magnet.

Disc rotating apparatus

Disclosed is a rotation signal detection device for use with a circuit for driving a DC motor with brushes, the device comprises a differential amplifier for detecting a pulse signal component of a waveform of the current supplied to the motor, a circuit for shaping an output of the differential amplifier, thereby actuating a logic circuit for controlling rotation of the motor by a DC level signal obtained from said shaped waveform.

Rotation signal detection device of DC motor with brushes

A tape recorder has an automatic repeating function, and includes a switching lever (435) displaceable between a first position to render a rewinding mechanism operable and a reproduction driving mechanism inoperable, and a second position to render said fast feeding mechanism inoperable and said reproduction driving mechanism operable, a rotary body (281) for operably connecting with said switching lever so as to perform said displacement of the switching lever by its torque and to rotate independently of the tape travel, and an automatic stop detection mechanism (39) for detecting the end of a tape so as to displace the switching lever from the second position to the first position.

Growing community of inventors

Yokohama, Japan

Kaoru Morinaga