Alps Electric Co., Ltd.

Yukio Saito

Motohiro Shimaoka

Kunihiko Gunji

Masao Okita

Masao Ohkita

Osamu Shigenai

Yasuyuki Hirose

Tadashi Shiraishi

A disk cassette loading mechanism for a disk driving apparatus, capable of preventing the accidental removal of a disk cassette from the disk driving apparatus. The disk cassette loading mechanism comprises a first operating member which engages a disk cassette inserted in the disk driving apparatus upon the arrival of the disk cassette at a predetermined position and remains engaging the disk cassette until the disk cassette becomes ready to be ejected, a second operating member which is turned resiliently in a cassette loading direction after the first operating member has engaged the disk cassette to load the disk cassette, and a third operating member which comes into engagement with the first operating means to turn the first operating member so that the first operating member is disengaged from the disk cassette when the disk cassette is moved to an ejecting position where the disk cassette is ready to be ejected without interfering with any mechanism of the disk driving apparatus by operating the sliding plate of the disk driving apparatus for cassette ejecting operation. Thus, the disk cassette loading mechanism prevents the accidental removal of the disk cassette from the disk driving apparatus.

Disk cassette loading and ejecting mechanism for a magnetic disk

A device for adjusting the position of a sensor corresponding to a predetermined reference track position of a read/write head with respect to a track on a magnetic disk, comprises a chassis, a carriage movably mounted on the chassis and supporting the read/write head, the carriage including a portion to be detected, an adjustment plate supporting a sensor for detecting the portion and having a pivot adjacent to the sensor and by which the adjustment plate is pivotally supported on the carriage, the adjustment plate having an actuating portion in one end thereof remote from the pivot, and a screw adjustably threaded through the adjustment plate into the chassis at a position between the actuating portion and the pivot.

Device for adjusting a sensor at a reference position corresponding to a

A recording and reproducing apparatus using a disk cartridge includes a cartridge holder in which the cartridge is received, a pivotable shutter, and a receiving portion mounted to the front end of the holder and coming into engagement with the shutter. The body of the apparatus is provided with an opening to allow insertion of the cartridge into the apparatus. The shutter is always biased in such a direction as to cover the opening, and is centrally provided with an extension which comes into engagement with the receiving portion, so that the holder is not operatively connected with the apparatus until the shutter is opened.

Disk loading mechanism for recording and reproducing apparatus

A construction for positioning photosensor devices, comprises an attachment having a circular hole, a first photosensor device such as a light-emitting element including a substantially semispherical body having a maximum diameter slightly larger than the diameter of the circular hole, a second photosensor device such as a photodetector element disposed in confronting relation to the circular hole, the semispherical body being partly fitted in the circular hole, thereby providing coaxial alignment between the first and second photosensor devices.

Construction for positioning photosensor devices

A recording and reproducing apparatus using a disk cartridge has a frame provided with angular holes each of which consists of a horizontal portion and a vertical portion. Rollers are disposed on the sides of the cartridge holder, and these rollers are moved vertically in the angular holes when a disk cartridge is inserted into the apparatus. The apparatus includes cam members having flat portions, inclined portions and intermediate edge portions. The apparatus further includes resilient members in resilient contact with the cam members for biasing the edge portions from the sides of the centers of the rollers toward the horizontal portions when the rollers are located in the vertical portions of the angular holes to allow the cartridge holder to be operatively connected with the apparatus.

Recording and reproducing apparatus including a cassette loading device

In a recording and reproducing device to be used with a disc cartridge, a cartridge holder receives the disc cartridge when it is inserted, and moves between an ejecting position and a load position. An eject lever supported by the cartridge holder is rotated when the leading edge of the disc cartridge is brought into contact with an end of the eject lever, and a spring member is provided in combination with the eject lever for urging the eject lever in a direction removing the disc cartridge out of the cartridge holder.

Spring loaded ejector for disc cartridge

In a recording and reproducing device for a magnetic disc, a swingable holder fixedly supports a first magnetic head, while a carriage supporting the holder swingably further supports a second magnetic head in a fixed manner. During a head-load time, the first and second magnetic heads are held in contact with the upper and lower surfaces of the magnetic disc at positions opposite to each other thereby to record or reproduce information to or from the magnetic disc. The recording and reproducing device of the above described construction is further improved by providing a damper device in a moving range of the holder so that the damper device can reduce impact when the first and second magnetic heads are brought into contact with the magnetic disc.

Recording and reproducing device for magnetic disc including a head

In a recording and playback apparatus for a disk cartridge, a loading lever is supported rotatably on a pair of sidewalls, and rotatable between a loading position which it takes when a disk cartridge is inserted into the apparatus and an ejecting position which it takes when the disk cartridge is ejected from the apparatus. A locking member is supported on one of the sidewalls rotatably into engagement with the loading lever to hold it in its ejecting position. A cam plate is also supported on the same sidewall reciprocally movably between its retracted position in which the loading lever is in its ejecting position and its advanced position in which the loading lever is in its loading position. The cam plate has an unlocking device which is engageable with the locking member to disengage it from the loading lever when the cam plate is moved to its advanced position. A locking spring is connected to the locking member for urging it into engagement with the loading lever. A tension spring is connected to the cam plate for urging it into its retracted position.

Disk cartridge loading and ejecting mechanism in a recording and

A recording and reproducing apparatus comprises a cartridge holder accommodating therein a disk cartridge, a body housing therein the cartridge holder and having a side wall, and a cam slidable on the side wall for moving the cartridge holder from a loaded position back to a position prior to loading, the cam being disposed between the side wall and a side of the cartridge holder and having on a side thereof a plurality of projections held in contact with the side wall.

Recording and reproducing apparatus having sliding loading and unloading

A recording/reproducing device including a cam which permits a cartridge holder to descend and assume a loaded state, a lock for locking the cam so as to hold the cartridge holder in the lock state before loading, and a detector for detecting that a disc cartridge has been inserted up to a predetermined position in the cartridge holder. The locked state of the cam is released upon detection of proper insertion of the cartridge, thereby allowing the cartridge holder to descend until it assumes the loaded state. Unless the disc cartridge is inserted in the predetermined position in the cartridge holder, the cartridge holder cannot assume the loaded state, thus permitting the recording/reproducing device to be used always in a normal condition.

Recording and reproducing apparatus including a cassette loading

A recording and reproducing apparatus has a loading mechanism for loading a disk cartridge, which is inserted in a cartridge holder, between an eject position and an operative load position. The loading mechanism has a load lever which pivots the holder to the load position when the disk cartridge is inserted to push against a portion of a cam plate and move it rearwardly in the apparatus. The apparatus has only one tension spring between the load lever, which is angularly movable between an eject position and a load position, and the cam plate which can bear on the cartridge. The tension spring angularly biases the load lever toward the load position and biases the cam plate toward an opening through which the cartridge is inserted.

Disk cartridge loading mechanism in a recording and reproducing apparatus

A recording and reproducing apparatus for a disk cartridge comprises a cartridge holder for holding the disk cartridge which is movable between an eject position and a loading position. A load lever is provided for resiliently urging the cartridge holder toward the loading position, and a movable lock member engageable with the load lever keeps the cartridge holder in the eject position. A cam plate is resiliently urged forwardly and is movable rearwardly by abutting engagement with the disk cartridge. The cam plate has a first engagement portion, and a lock lever has a second engagement portion engageable with the first engagement portion to hold the cam plate in its rearward position. A solenoid energizable in response to an eject signal moves the lock lever to bring the second engagement portion out of engagement with the first engagement portion of the cam plate, and an eject lever engageable by the inserted disk cartridge serves to eject the disk cartridge. The cam plate has a release member for releasing the load lever from engagement with the lock member to allow the cartridge holder to move to the loading position and a cam surface for causing the load lever to move the cartridge holder from the loading position back to the eject position.

Loading and ejecting mechanism in a recording and reproducing apparatus

Disclosed is a magnetic disk comprising a center hub directly/indirectly fixedly attached to a central hole portion of a disk-like magnetic storage medium, a circular center hole formed at a central portion of the center hub for receiving a driving spindle inserted thereinto, and a groove annularly formed in an inner wall of the center hole for receiving portions of members provided at the driving spindle side. The member may preferably be balls. The balls are sandwiched between a center hub bearer rotatably attached on the driving spindle and a ball pressing fixedly provided on the driving spindle.

Magnetic disk and spindle for driving the same

A recording and reproducing device records and reproduces signals in and from a disk cartridge having slots defined in lateral edges thereof and housing a magnetic disk, a magnetic head insertion hole, a shutter for opening and closing the magnetic head insertion hole, a shutter actuator projection slidably disposed in one of the grooves defined for actuating the shutter. The recording and reproducing device comprises a frame having a cartridge insertion hole for the insertion therein of the disk cartridge, opening and closing actuator projections held in resilient contact with the bottoms of the grooves, respectively, for actuating the shutter actuator projection in engagement therewith while the disk cartridge is inserted through the cartridge insertion hole into the frame, and stopper members disposed laterally of the opening and closing projections for preventing the latter from being laterally displaced beyond a distance smaller than the length of projection of the shutter actuator projection.

Recording and reproducing device

A recording/reproducing device including a detector means for detecting a closed state of a magnetic head insertion aperture opening and closing shutter attached to a disc cartridge when the disc cartridge is inserted into a cartridge holder up to a predetermined position, and a load stopping means for stopping the cartridge from assuming a loaded state upon detection of the closed state of the shutter by the detector means. Since the transfer to the loaded state of the disc cartridge is effected after making sure that the magnetic head insertion aperture is open, the recording and playback can be done always in a proper condition, thus permitting improvement of reliability.

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Furukawa, Japan

Yukio Saito