Pioneer Electronic Corporation

Pioneer Corporation

Other

Kenji Uchiyama

Susumu Yoshida

Tomomichi Kimura

Toru Suzuki

Kenjiro Ido

Takashi Mizoguchi

Kenji Nakamura

Yasuhiro Shinkai

Shigeru Kojima

Sei Onishi

Takashi Sasaki

Shinichi Naohara

Kazunori Matsuo

Kaoru Takemasa

Masao Yoshida

Masami Fujimoto

Yasuhisa Okamoto

Akihiro Muto

Tetsuya Niino

Takashi Komiyama

Tetsuya Uchiyama

Yasuo Ogiwara

Michihiro Satoh

A clamp/alignment mechanism has: a turntable on which a recording medium is mounted, the turntable being rotated by a rotation driving device; a holding device for holding the recording medium mounted on the turntable; an aligning device for aligning the recording medium mounted on the turntable; and a driving device for driving both the holding device and the alignment device. The driving device is configured to drive the aligning device in an aligning direction along which the recording medium is subjected to alignment thereof, in cases where the holding device is driven in a holding direction in which the recording medium is to be held.

Clamp and alignment mechanism, and information recording and reproducing mechanism using the same

An information reproducing apparatus is provided with: a clamping device () capable of clamping and clamp-releasing a recording medium (); a rotating device () for rotating the recording medium clamped by the clamping device; a reading device () disposed opposite to an information record surface of the recording medium for reading information recorded on the information record surface of the recording medium; a driving device (D,) capable of moving the reading device in a radial direction of the recording medium; and a linkage device () for linking a clamping or clamp-releasing action by the clamping device with a movement of the reading device by the driving device. The driving device moves the reading device as a first driving voltage is supplied to the driving device upon reading the information recorded on the information record surface, the first driving voltage including such a value that the action of the clamping device is not linked with the movement of the reading device by the linkage device.

Information reproducing apparatus and method, and drive control system

The optical pickup moving mechanism includes: a feed screw and a guide shaft, which are arranged in parallel with each other, for movably supporting an optical pickup; and a drive motor for giving a drive force to the feed screw so that the optical pickup can be moved along a recording medium. The skew adjusting mechanism of the optical pickup for adjusting a skew of the optical pickup adjusts a skew of the optical pickup when the feed screw and the guide shaft are respectively moved and adjusted.

Optical pickup apparatus

A disc storage is provided for storing a plurality of trays, each for holding a disc. The trays are stacked in the storage. A movable member is provided to be moved in the vertical direction. A disc player, a tray moving device are mounted on the movable member. The tray moving device is provided to be engaged with trays for moving the trays and for increasing a space between a desired tray and an adjacent disc for receiving disc player, and for decreasing the space during the reproduction of the desired disc.

Disc reproducing device

A disc storage stores a plurality of discs. A pair of driving rollers are provided for carrying a disc inserted from an opening to the disc storage. Each of the driving rollers is provided to be moved between a disc carrying position and a retracted position by a moving device.

Disc changer for a disc player

A supporting mechanism is provided to be moved between a disc insertion opening and a disc storing device, and a driving roller is rotatably mounted on the supporting mechanism for carrying a disc inserted in the opening toward the disc storing device. The supporting mechanism is moved between the opening and the disc storing device, and the driving roller is driven for carrying the disc from the opening to the disc storing device.

Apparatus for reproducing an optical disc

A disc storage is provided for storing a plurality of trays, each for holding a disc. The trays are stacked in the storage. A movable member is provided to be moved in the vertical direction. A disc player, a tray moving device are mounted on the movable member. The tray moving device is provided to be engaged with trays for moving the trays and for forming spaces between trays for receiving disc player. A driving device is provided for vertically moving the movable member.

An optical pickup sending device comprises: an optical pickup for reading information from an information recording medium; a rack member provided in connection with the optical pickup; and a screwed shaft engaged with the rack member for sending the optical pickup along the screwed shaft. In particular, the rack member is formed with a plurality of curved teeth each having a radius of curvature larger than that of the screwed shaft.

Optical pickup sending device

A plurality of trays, each for holding a disc, are arranged in a disc arranging direction in a disc storage. A movable base is provided to be rotated about a shaft and a disc player having a turntable, a disc clamper and a pickup, is mounted on the movable base. A driving device is provided for rotating the movable base between a retracted position and a disc reproducing position. A lock device is provided on the chassis for engaging with the movable base at the disc reproducing position to minimize external vibrations to the movable base during disc reproduction.

A device for detecting the end of the tape indicating that the tape cassette is entirely wound on one reel so that the reels are prevented from rotating further and such that the driving direction is reversed. The tape end detecting device includes a switch for indicating the end of the tape, a rotatable wheel responsive to the driving of the tape so as to rotate in a predetermined direction irrespective of the direction in which the tape is driven, a pivotable arm engageable at one end with the rotatable wheel and movable in a forward and backward direction, a rotatable cam member including a movable cam engageable with a pin of the pivotable arm to pivotably move the pivotable arm and an urging cam for urging the pin when the pivotable arm does not pivot and an operating portion mounted on the pivotable arm operating the switch when the pin is urged by the urging cam.

Tape end switch detecting device for tape player

An improved detection device for detecting whether a tape is a normal tape or a chrome or metallic tape and for detecting whether the recording head is at an eject position, a stop position or a recording/reproducing position. The device includes an operating piece movable in accordance with the movement of the recording head, a switching piece for turning ON and OFF a switch, the switching piece having a cam surface engageable with the operating piece, a detecting piece having a cam surface engageable with the operating piece and having a detecting portion insertable into a tape characteristic hole formed in a cassette half, and a second switch adapted to be turned ON and OFF in accordance with the movement with the head.

Growing community of inventors

Saitama-ken, Japan

Kenji Uchiyama