摘要:
The present invention relates to a magnetic recording and reproducing device wherein reproduction monitoring can be made directly after recording, and more particularly to a construction of a rotary drum for the same. The magnetic recording and reproducing device includes a single recording channel for n recording magnetic heads, and n reproducing channels for n reproducing magnetic heads. The recording channel is provided either on an innermost circumference side or on an outermost circumference side of a rotary transformer. Since the device has such a reduced number of recording channels, the distance between adjacent channels can be increased and the transmission loss of a reproduction signal can be reduced.
摘要:
As a method of increasing the storage capacity of a magnetic recording and reproducing apparatus for recording and reproducing information to and from a magnetic tape in a cartridge, there is a helical scan recording method in which the magnetic tape is diagonally wound around a drum which rotates a magnetic head. With an apparatus adapted to this method, the disposition of the cartridge and the take-up reel for taking up the magnetic tape on the same plane arises a necessity of considerably bending the magnetic tape at the drum portion and, accordingly, the magnetic tape is damaged. In order to prevent the damage of the foregoing type, the tape passage surface from the cartridge to the drum and the tape passage from the drum to the take-up reel are formed by an angle at which the direction in which the magnetic tape is moved is changed due to winding of the magnetic tape around the drum so that the magnetic tape is not bent excessively. A threading device capable of three-dimensionally controlling the position of the magnetic tape in accordance with a predetermined tape passage is provided for the apparatus structured as described above. The threading device is formed by a link mechanism to be moved along the locus of a cam groove so that the three-dimensional position control can be performed.
摘要:
A tape run control unit in the magnetic recording/reproducing apparatus is provided with a discrimination element and a control element. The discrimination element detects a stand-by time until a signal to be recorded is received in repositioning of the tape and generates a discrimination signal for discriminating the length of the stand-by time. The control element controls tape run driving unit such as a capstan motor during the reposition and controls the stop position of the tape such that a magnetic head scans the portion of the tape where no data is recorded. After completion of repositioning, furthermore, the control element works according to a discrimination signal so as to select the stop mode which involves the release of pinch roller when the stand-by time is long and to select the mode for simply stopping only the capstan when the stand-by time is short.
摘要:
A tape cartridge is arranged so that when an upper lid of a pocket portion of the tape cartridge is in a position for opening the upper side of the pocket portion, the upper lid is positioned above an upper surface of a casing body so that a lower surface of the upper lid faces the upper surface of the casing body through a gap in which a member of a recording/reproduction apparatus for depressing the cartridge can be placed. When the upper lid is in the position for opening the upper side of the pocket, the cartridge depressing member of the recording/reproduction apparatus is placed in the gap to depress the cartridge, whereby the cartridge can be stably depressed to and mounted in a predetermined position in the recording/reproduction apparatus when the cartridge is loaded in the apparatus.
摘要:
A magnetic recording and reproducing apparatus of rotary head type such as a rotatable video tape recorder has a tape guide for guiding the magnetic tape when the tape runs on and around a cylinder carrying rotary heads. A tape loading movable member carries the tape guide. A tape loading drive is provided for driving the tape loading movable member so as to move the tape guide between a tape loading position where it places the magnetic tape in contact with the cylinder through a predetermined angle and an unloading position where it keeps the magnetic tape away from the cylinder. A locating unit is provided on at least one of the cylinder and a cylinder base carrying the cylinder. The locating unit is adapted for engaging with the tape loading movable member in the tape loading position so as to locate the tape guide with respect to the cylinder. The tape loading drive drives the tape loading movable member by making use of the mechanical motion of a cassette holder for mounting the cassette on a predetermined portion of the apparatus.
摘要:
A tape run control unit in a magnetic recording and reproducing apparatus is provided with a discriminator and on a controller. The discriminator detects a stand-by time until a signal to be recorded is received in repositioning of the tape and generates a discrimination signal for discriminating the length of the stand-by time. The controller controls tape driving unit such as a capstan motor during the reposition and controls the stop position of the tape such that a magnetic head scans the portion of the tape where no data is recorded. After completion of repositioning, furthermore, the controller is responsive to a discrimination signal so as to select the stop mode which involves the release of pinch roller when the stand-by time is long and to select the mode for simply stopping only the capstan when the stand-by time is short.
摘要:
It is an object to provide a cooling device for optimally cooling a semiconductor device on a CPU blade which is detachable with respect to an electronic apparatus using the cooling device with compact structure for reducing power consumption. A cooling device for cooling a semiconductor device disposed on an electronic circuit substrate in a casing of an electronic apparatus, comprising a first cooling unit comprising a first heat absorbing portion and a first heat releasing portion, and a second cooling unit comprising a second heat absorbing portion and a second heat releasing portion, wherein the first heat absorbing portion is disposed in contact with the semiconductor device, the second heat absorbing portion is detachably disposed in contact with the first heat releasing portion, a phase-change refrigerant is contained in the first cooling unit, and the second heat releasing portion is disposed outside the casing.
摘要:
A liquid crystal display apparatus, comprises: a liquid crystal display (3); and a plural numbers of light emitting diodes (7), as a directly underlying type backlight, which is disposed on a rear surface of the liquid crystal display, so as to irradiate lights upon said liquid crystal display, wherein a translucent light guidance member (5), which is provided at least corresponding to each one or more of the plural numbers of light emitting diodes, and the translucent light guidance member (5) is in a cylindrical configuration, and reflection surfaces are defined on each of outer wall surfaces (53) and inner wall surfaces (52) of the cylindrical light guidance member, so as to reflect the lights from the light emitting diodes upon those reflection surfaces, and thereby guiding them onto a side of the liquid crystal display by those reflection surfaces.
摘要:
A tape guide moving mechanism for use with magnetic tape reproducing apparatus having a cylindrical cylinder mounted with a rotatable magnetic head thereon, and adapted to draw a magnetic tape from a tape cartridge and wound the magnetic tape on the cylindrical outer surface of said cylinder, comprising: a plurality of tape guides having a first group of tape guides and a second group of tape guides, drawing out the magnetic tape in a direction parallel to a plane perpendicular to the rotating axes of said supply and take-up reels; and drawing out the magnetic tape through said second position in slanting relation to a plane perpendicular to the rotating axis of said supply and take-up reel and winding said thus drawn magnetic tape around said cylinder in slanting relation to the plane section thereof.
摘要:
A recording tape cartridge which comprises a lid member mounted on a cartridge case to rotate between a closed position and an opened position, clearance means defined in one corner of the cartridge case and a lid locking means provided in the clearance means for locking the lid member in the closed position. The lateral width of the clearance means is wider in its front portion than that in its rear portion.