Pioneer Corporation

Pioneer Electronic Corporation

Hitoshi Ueno

Eiji Hoshinaka

Youichi Konno

Keiichi Takagi

Yukinari Makisaka

Yuji Ikedo

Shigeru Yoshida

Yasuyuki Tashiro

Katsumi Sawada

Yukitada Ayukawa

Shirokazu Yazaki

A recording medium drive includes a disc ejecting mechanism that ejects an optical disc disposed on a turntable to a slot. The disc ejecting mechanism is provided with a first disc feeding mechanism disposed on a rear side in a drive unit body and a second disc feeding mechanism (a disc guide mechanism) that is disposed on a slot side relative to the first disc feeding mechanism and continuously feeding the optical disc fed by the first disc feeding mechanism in a direction toward the slot. The optical disc having a small diameter can be transferred from the turntable to the slot by the first disc feeding mechanism and the second disc feeding mechanism which are respectively disposed on the rear side and a front side of the slot, thereby ejecting the optical disc to the outside.

Recording medium driving device having an improved disc feeding mechanism

A switch () is adapted to be On when a contact point () is at a position to be in contact with a cam surface () and Off when the contact point () is at a position corresponding to a non-cam surface (). In the vicinity of the non-cam surface () of the cam surface (), a rib () is provided which changes a direction of the contact point () when reciprocation of the cam member () is changed. Accordingly, even when the switch () comes into contact with the cam member () moving in a different direction, the direction of the contact point () is changed so as to be the same. Hence, the switch () is prevented from being affected by a hysteresis caused by difference in directions of the contact point ().

Switch mechanism and disk device

Provided are a disc guide mechanismthat is disposed on one end side of a slotA in a drive unit bodyand guides an optical disc; and a disc diameter detecting mechanismthat is disposed on the other side of the slotA in the drive unit bodyand retracts the disc guide mechanismwhen the optical discinserted in the slotA is large and advances the optical discwhen the optical discis small. The disc guide mechanismand the disc diameter detecting mechanismwhich are respectively disposed on sides of the slotA can center the optical discin accordance with a diameter of the optical disc

Recording medium driving device

The disk carrying apparatus includes a lifting portion which carries a disk onto a turntable, a chuck which holds the carried disk on the turntable, and a third switch which detects an intermediate position between a holding operation start position where the chuck starts a disk holding operation and a holding operation end position where the chuck finishes the disk holding operation. After completion of an initial disk holding operation, the chuck returns to the intermediate position detected by the third switch and retries the disk holding operation.

Disk carrying apparatus

A heating element (IC, transistor or the like) is placed on a printed circuit board and silicon grease is coated on the surface of the printed circuit board side of the heating element. The projection portion of a radiator with a step portion is inserted into the through hole of the printed circuit board and closely contacted with the lower portion of the heating element through the silicon grease. As a result, heat generated from the heating element is transferred to the projection portion of the radiator through the silicon grease and then transferred to the entirety of the radiator. Excessive silicon grease is collected in a step portion provided at the base of the projection portion of the radiator and prevented from leaking to other portion such as a portion on the board.

Radiation structure for heating element

A front loading disc player for automatically delivering a disc onto a turntable and playing back the disc includes a disc delivery mechanism for delivering the disc. The disc delivery mechanisms has two trays for carrying respective discs, juxtaposed in a direction substantially normal to the disc carrying surface of the turntable and movable into a projected position out of the player housing and a retracted position in the player housing, and a guide and driver means for guiding and moving the trays into the playback position, the retracted position, and the projected position. While one of the trays is in the playback position, the other tray is positioned in either the stored position or the projected position. While the disc delivered by one of the trays onto the turntable is being played back, therefore, the disc on the other tray can be replaced with a new disc, so that a number of discs can successively be played back.

Front loading disk player

A magazine loading type disk player comprises a magazine mount portion for removably mounting a magazine. The magazine includes a housing and a plurality of plate-like trays for carrying respective disks. The plate-like trays are capable of being projected from and retracted into the housing. The disk player further comprises a pickup and a turntable supported on a supporting member so as to be movable in a direction of the arrangement of the trays for receiving a selected one of the disks from the magazine; a positioning mechanism for positioning the supporting member which carries the pickup and turntable; and a disk moving mechanism for feeding the selected disk from the magazine to the turntable after positioning of the support member, and for retracting the selected disk. The positioning mechanism includes a pair of cross-links for movably supporting the supporting member, and a link driving mechanism for moving the cross-links. Each of the cross-links has a fixed pivot side link and a movable pivot side link pivoted to each other through a pin. The fixed pivot side link of one of the cross-links has a sector gear provided at the free or pivoted end. The link driving mechanism transmits movement to the sector gear to swing the fixed pivot side link.

Magazine loading disk player

A door construction for covering control knobs or the like upon the front panel of the electronic equipment. Hinge members rigidly coupled to the door member have rotatably mounted thereon guide rollers which are disposed into corresponding guide grooves. Each guide groove has a linear guide portion and an enlarged circular guide groove at the front end thereof. Each of the guide rollers has a substantially oblong portion and a coaxial cylindrical portion wherein the door is movable only horizontally when the oblong portions are engaged with the linear grooves and the door is only rotatable when the circular portions are engaged with the enlarged circular grooves.

Growing community of inventors

Tokorozawa, Japan

Hitoshi Ueno