摘要:
The two-sided magnetic recording and reproduction device according to the present invention is very simple in structure in which a single negative pressure generating type stabilizing plate is used to achieve good contact of two magnetic heads with the front and backside of a magnetic disc, whereby position adjustment and assembly work of the individual members can be simplified to achieve a reduction in cost, the frictional resistance of the stabilizing plate to the magnetic disc can be reduced to reduce the driving torque, and abrasion to the magnetic disc and the magnetic heads can be suppressed. Furthermore, since the upper and lower heads are inclined to the inside and outside with respect to the magnetic disc, or, the surface of the stabilizing plate opposing the magnetic disc is inclined in the direction to the inner and outer peripheral sides, the gaps of the upper and lower magnetic heads are caused over their entire widths to come in sliding contact, thereby achieving a very good and stable head contact.In addition, since there is provided supporting means for elastically supporting one of the upper and lower magnetic heads, a good contact of the magnetic heads following the magnetic disc is achieved, thereby enabling stable recording and reproduction.
摘要:
A cartridge is composed of a cartridge body and a shutter. A hologram recording disk is rotatably contained in a disk recess formed in the cartridge body. The shutter comprises upper and lower shutter plates between which the cartridge body is interposed. The shutter opens and closes openings formed in both surfaces of the cartridge body. When the shutter is kept in a closed position where the openings are closed, the edges of the shutter are inserted into slits formed around the opening. Further, a groove is formed at an end portion of the shutter. Into the groove, a ridge formed on the cartridge body is inserted.
摘要:
An instant film pack includes a plurality of instant photo films. A case contains the instant photo films being stacked. An exit slot is formed in the case, for exiting the instant photo films to an outside of the case one after another. A claw path opening is formed in the case, for receiving insertion of an advancing claw mechanism for advancing the instant photo films by one photo film to move to the exit slot. A thrust preventing flap is disposed on an inside of the exit slot, for closing the exit slot at the middle, to prevent the instant photo films from coming through the exit slot. Furthermore, a light shielding sheet of aluminum foil closes the claw path opening in a light-tight manner, and is released to open the claw path opening upon advance of the advancing claw mechanism.
摘要:
A lens-fitted photo film unit has a pre-loaded cassette. A roll of unexposed photo film is drawn out of the cassette. After photography, an exposed portion of the photo film is wound into a cassette shell around a spool. A stopper level, inside the cassette shell, is swingable from a position of latching the spool immovably on the cassette shell, to a position of unlatching. A shutter plate, inside a photo film passage port in the cassette, closes to block ambient light from entering the passage port, and opens the passage port to allow photo film to pass. A bottom lid closes a cassette containing chamber. A lock slider is mounted in the bottom lid in order to lock and unlock the bottom lid on the chamber. The stopper lever is connected to the lock slider, and latches the spool while the bottom lid is unlocked, and leaves the spool unlatched while the lock slider locks the bottom lid. A rear lock bar on the bottom lid locks and unlocks the bottom lid. The rear lock bar is engaged with the shutter plate, and closes the shutter plate while the bottom lid is unlocked, and opens the shutter plate while the rear lock bar locks the bottom lid. A pointer is disposed on an end of the spool. An associated face of the cassette shell has four indicative areas, and are pointed by the pointer, to indicate one of four graded statuses of use of the photo film.
摘要:
A photographic camera includes a cassette chamber for containing a film cassette having a fork provided therein which is coupled to a spool in order to rotate the spool. After loading the film cassette in the cassette chamber, the fork is rotated by a motor in the winding direction for tightening a roll of the photographic film in order to prevent a film from jamming when advancing the film leader. The fork is then rotated in a normal or forward direction for advancing the film leader. In a preferred embodiment, a photosensor detects the photographic film fed from the film cassette and generates a detection signal. The fork is rotated in the normal direction before the reverse rotation. It is then determined whether the photographic film is advanced. If not, the fork is rotated in the reverse direction.
摘要:
A cartridge (2) is composed of a lower shell (30), an upper shell (31), a shutter 10 and a lock mechanism (11). A hologram recording disk (4) is rotatably contained in a disk recess (3) of a cartridge body (25) formed by joining the lower shell (30) and the upper shell (31). Inner surfaces of the lower shell (30) and the upper shell (31) are provided with a first concave portion (34), a second concave portion (35), a first convex portion (42) and a second convex portion (43). When the lower shell (30) and the upper shell (31) are joined, the concave portions and the convex portions engage to form a labyrinth-like light-shielding structure. In virtue of this, light and dust are prevented from entering through a gap residing between the lower shell (30) and the upper shell (31).
摘要:
A cartridge shell includes a film take-up unit for containing a cassette shell with a rotatable spool and a film supply unit for containing a roll of photo filmstrip one end of which is secured to the spool. Inside the film supply unit, light shielding members are provided in order to prevent an unexposed photo film roll from being exposed. Each of the film take-up unit and the film supply unit has a bridge, and the both bridges are movably fitted into each other. When the photo film cartridge is not used, both of the bridges are completely overlapped each other so that the cartridge shell becomes small in size for convenience of portability.
摘要:
A cassette for containing photographic film has a spool which is provided with retaining claws for retaining a trailer of the photographic film. A cassette port communicates the spool chamber to the outside. To load the photographic film into a cassette, a loading apparatus picks up the trailer with an inserter jig. The inserter jig is passed through the passage port, and is brought to the spool so as to insert the trailer into the cassette shell. The trailer is retained on the spool with the retaining claws. The inserter jig is then drawn out of the cassette shell. Then the spool is rotated in order to wind the photographic film around the spool, fully into the cassette shell. To remove exposed photographic film from such a cassette, the photographic film is drawn and unwound. A separator jig, as passed through the passage port, is brought to the spool. The trailer is released from retention on the retaining claws by use of the separator jig. Then the photographic film is drawn out so as to separate the trailer from the spool.
摘要:
A photographic film cassette comprises a locking member pivotally movable into engagement with a spool to inhibit rotation of the spool. The locking member is moved by a light-shielding door member through a cam. A cam follower surface of the locking member is brought into contact with the cam in the closed position of the light-shielding door member, such that force biasing the light-shielding door member toward the closed position is applied from the locking member to the light-shielding door member in the closed position. The locking member is provided with a hook for engagement with a recessed portion formed in an inner wall of a cassette shell. The hook is engaged with the recessed portion when the locking member is placed in an initial assembled position. Thereafter, the locking member is rotated about the hook from the initial assembled position into a final assembled position where a smaller clearance is provided between the hook and the recessed portion compared with the initial assemble position.
摘要:
A photographic film cassette has a rotatable spool on which photographic film is wound. A leader of the photographic film is advanced outward through a passage port by rotation of the spool in an unwinding direction. A shutter rod is arranged in the passage port, and is rotated between closed and open positions. When assuming the closed position, the shutter rod blocks the passage port to shield the ambient light. When the shutter rod assumes the open position, the photographic film is allowed to pass. An externally operable locking lever regulates rotation of the shutter rod, and is swingable with resilience between a locking position, where the shutter rod is locked in the closed position, and an unlocking position, where the shutter rod is unlocked. When the spool is rotated, the lever rotates the shutter rod to the open position. An exposure status indicating device is arranged on an end face of a cassette shell, and has a pointer, which points a plurality of indicative areas and indicates the present status of the photographic film.