摘要:
A disk transfer device includes first and second edge supporting transfer elements. First and second edge supporting transfer elements are urged toward each other, thereby supporting a disk between them. When no disk is between them the transfer elements are a predetermined distance apart. That predetermined distance is less than the diameter of a disk. Therefore, when a disk is inserted in the disk transfer device at an eject position by a user, the first and second edge supporting transfer elements are pushed apart until they support the disk at diametrically opposed points on the disk. The movement of the first and second transfer elements is detected and the detector to produce a signal indicating that a disk has been inserted in the disk transfer device. In response to this signal, automatic loading of the disk is initiated.
摘要:
A disk playback device has a magazine for storing a plurality of carriages, each capable of carrying a disk. The magazine moves vertically relative to a chassis to align a playback position with a selected one of the carriages. A selected carriage is moved out the magazine and into the playback position for playing. Carriages selected for playback are in contact with adjacent carriages which tend to shift out of the magazine along with selected carriage. To prevent this unwanted shifting and retain a very compact configuration, the present invention provides a pair of parallel restrainers. The restrainers are mounted vertically on the chassis and fit into notches on the carriages stored in the magazine. A gap between the restrainers is positioned so that when the selected carriage is aligned with the playback position, the selected carriage is free to move into the playback position. The engagements between the notches of the adjacent carriages, however, prevent them from shifting along with the selected carriage. The restrainer is mounted behind the edges of the carriages closest to the playback position and therefor does not take up any room between the playback position and the magazine. Therefore, a high degree of compactness can be achieved.
摘要:
A disc player has a magazine for storing discs and a disc transport mechanism transporting a selected disc between a playback position outside the magazine and a store position located within the magazine. The carriages are stacked upon each other and pivotally supported within the magazine. The carriages are extracted from the stack by lifting a front end of a carriage above a selected carriage. Subsequent to the lifting of the carriage, the selected carriage is withdrawn from the magazine to the playback position. When a selected carriage is moved to the playback position, the discs on carriages above and below the selected carriage are prevented from shifting with the removal of the selected carriage by coaxial opposing shafts which extend through spindle holes in the discs on the carriages above and below the selected disc. A closeable gap between the two shafts permits the selected disc to be shifted. The gap is closed, except when a carriage is being shifted into or out of the magazine, thereby preventing discs and their carriages from shifting due to vibration or tilting of the cabinet. When the device is in a stop mode, the magazine shifts to pierce any carriages capable of holding discs of different sizes, thereby preventing smaller disc from moving into recesses for larger discs.
摘要:
A disc player has a magazine for storing discs and a disc transport mechanism transporting a selected disc between a playback position outside the magazine and a store position located within the magazine. The carriages are stacked upon each other and pivotally supported within the magazine. The carriages are extracted from the stack by lifting a front end of a carriage above a selected carriage. Subsequent to the lifting of the carriage, the selected carriage is withdrawn from the magazine to the playback position. When a selected carriage is moved to the playback position, the discs on carriages above and below the selected carriage are prevented from shifting with the removal of the selected carriage by coaxial opposing shafts which extend through spindle holes in the discs on the carriages above and below the selected disc. A closeable gap between the two shafts permits the selected disc to be shifted. The gap is closed, except when a carriage is being shifted into or out of the magazine, thereby preventing discs and their carriages from shifting due to vibration or tilting of the cabinet. When the device is in a stop mode, the magazine shifts to pierce any carriages capable of holding discs of different sizes, thereby preventing smaller disc from moving into recesses for larger discs.
摘要:
A device for opening a shutter of a disc cartridge along with insertion of the disc cartridge into a holder of a recording and/or reproducing apparatus for performing recording and/or reproducing operation is disclosed. The device includes at least one arm member freely rotatable about a pivot provided at one end thereof and having at the other end a first engaging portion adapted to be in engagement with the shutter substantially during insertion of the disc cartridge. A guide means or a slot extending in an oblique direction between the cartridge inserting direction and a direction in which said shutter is slided to open is provided for guiding therealong a second engaging portion of the arm member during first-step advancement of the disc cartridge into the holder from an unloaded position to a half-loaded position, thereby rotating the arm member to open the shutter due to continued engagement thereof with the first engaging portion. The pivot of the arm member is supported by a sliding member and is sliding therewith in the cartridge inserting direction during second-step advancement of the disc cartridge from the unloaded position to a full-loaded position. A spring is connected between the arm member and the holder or apparatus for biasing the arm member toward a direction opposite to the cartridge inserting direction.
摘要:
A changer-equipped player uses an n number of carriages which can hold up to an n number of discs in storage positions in a stocker. These carriages carry discs between the stocker and a movable tray for play and for loading and unloading. One of the n number of carriages, carriage S, is usable in a single-play mode, allowing the player to be used as a tray equipped single-play device. Carriage S may be selected for single-play regardless of the number of discs stored in the remaining n-1 number of carriages. The remaining n-1 number of carriages are usable only in changer-play operation. Loading discs into the device is accomplished by placing discs into empty carriages as each is held in the tray in an eject position. The stocker is not removed for loading discs or for removing or replacing the discs stored within it. During changer-playback operation, the device selects and plays all stored discs in a predetermined sequence. During single-play operation the device plays only the disc in carriage S.
摘要:
A D/A converter divides an input digital data into at least two overlapping digital ranges. The data in the two ranges are converted separately from digital to analog by a low-range and a high-range DAC. The resulting analog signals are then added with a weighting that maintains the proper loudness relationships in the final combined analog output. In a low range of amplitudes, only the low-range DAC performs D/A conversion. Above a predetermined amplitude threshold, some of the high significant bits to the low-range DAC are frozen, while a remaining low significant bits of the low-range DAC are permitted to vary with the input digital data. Above the predetermined amplitude threshold, a digital value is subtracted from the data fed to the high-range DAC. The subtracted value is equal to the frozen value in the low-range DAC. In some embodiments, one or more supplementary bits are developed to smooth the transition between ranges. In other embodiments, more than two DACs receive overlapping ranges of the input digital data. In some of the embodiments, positive and corresponding negative analog representations of the ranges are connected in push-pull.
摘要:
A device for actuating a shutter of a disc cartridge along with insertion of the disk cartridge into a holder of a recording and/or reproducing apparatus is disclosed. The device includes an engaging pin mounted on a lever member and adapted to be in engagement with one end of the shutter during the travel of the cartridge from a half-loaded position to a full-loaded position. The engaging pin extends downwardly through an oblique-inwardly engaging slot and protrudes into a cartridge accommodating space within the holder. A very small force is needed to smoothly actuate the shutter because a guide pin secured to the cassette or disc cartridge holder will act as an axis of rotation for the lever member 14 by vitrue of a slot provided in the other end of the lever member from the engaging pin. The guide pin is rotatably and linearly displaced with regard to the slot in the lever member. In a second embodiment of the invention, a second pin is placed in the lever member in place of the slot and a platform having a slot in the cartridge inserting direction engages said second pin.
摘要:
A linear motion guide unit having a rack and pinion mechanism for preventing slippage in relative sliding motion is provided. The linear motion guide unit includes a table elongated in shape and having a generally U-shaped cross section and a bed elongated in shape and having a generally U-shaped cross section which is oriented with its inner surface facing the inner surface of the table. The unit also includes a plurality of balls sandwiched between the table and the bed so as to provide a rolling contact therebetween. Also provided is a retainer having a horizontal section and a pair of vertical sections extending from the opposite sides of the horizontal section and formed with a plurality of windows for receiving therein the balls. The horizontal section of the retainer is formed with a slot and a pinion gear is rotatably supported on the retainer as extending partly through the slot and at the center in the widthwise direction of the retainer. A pair of top and bottom racks are mounted on the table and the bed, respectively, such that the pinion gear is in mesh with both of the top and bottom racks.