Abstract: A pole base loading apparatus and a main chassis for a magnetic recording/reading device having an improved structure. The pole base loading apparatus includes a pair of pole base units for guiding a tape so that the tape is wound around a head drum as it reciprocates on a main chassis, a pair of loading gears respectively linked to the pole base units and gear-engaged with each other, and a loading unit for rotating the loading gears. At least one of the pair of loading gears has a hook installed therein so that the loading gear is coupled to the main chassis.

Abstract: Provided are a magnetic recording and/or reading apparatus and a method of manufacturing a power transmitting gear. The magnetic recording and/or reading apparatus includes a power transmitting gear. The power transmitting gear has one end coupled to a loading motor and the other end coupled to a plurality of link gears to transmit power from a loading motor to drive components during loading and unloading of a magnetic tape. The power transmitting gear includes a first gear engaged with a motor gear coupled to a shaft of the loading motor. The power transmitting gear also includes a second gear engaged with one of the plurality of link gears and a shaft member coupling the first and second gears. A space is formed inside the shaft member to prevent the shaft member from deforming during manufacture of the shaft member.

Abstract: A disk loading apparatus, such as is disposed on a mobile electronic device to load a disk in a position to record information to or reproduce information from the disk, includes a main chassis, a loader assembly disposed on the main chassis to raise and lower the disk, and having a chucking unit, conveying rollers disposed to the main chassis to move the disk, a guide unit to guide ascending and descending movements of the loader assembly, so that the chucking unit compresses and chucks the disk, and a power transmitting unit to transmit power to the conveying rollers and the guide unit. With this, the mobile electronic device, such as a camcorder or the like, can implement a conveyance of the disk while satisfying such characteristics as a quality in appearance thereof, and a miniaturization in size thereof.

Abstract: A lever fixing apparatus of a cassette housing has at least one lever for connecting a cassette holder to a chassis and at least one snap fixing unit for connecting the lever to at least one of the cassette holder and the chassis in a snap manner to hingedly fix the lever thereto. The lever fixing apparatus can fix the lever to the chassis without using additional coupling parts. Accordingly, the number of processes for assembling the cassette holder to the housing bracket can be reduced and the working time is saved, thereby the productivity being increased.

Abstract: A head drum assembly for a tape recorder maintains a substantially constant preload and reduces manufacturing costs. The head drum assembly includes a shaft fixed to a center of a stationary drum, a rotary drum installed to an upper portion of the stationary drum to be rotated by the shaft and having a rotor, a stator installed to an upper portion of the rotary drum to face the rotor, a bearing interposed between the shaft and the rotary drum that rotatably supports the rotary drum, a spring resiliently supporting an inner race of the bearing, and a drum cover fixed with the stator and fixed to the shaft to apply a substantially constant pressure to the bearing and to substantially constantly maintain a spacing between the stator and the rotor.

Abstract: Disclosed is a deck for a magnetic recording/reproducing apparatus. The deck has a chassis in which a plurality of structures constituting a mechanical mechanism for loading a tape and recording or reproducing information; and a switch/sensor circuit board in which a plurality of switches and sensors constituting an electronic mechanism for detecting an operation of the deck and a state of the structures. The switch/sensor circuit board is formed of a PCB and assembled to a lower surface of the chassis.

Abstract: A stator assembly of a motor for a head drum is provided to generate a driving force disposed opposite to a motor rotor. The stator motor includes a double sided flexible printed circuit (FPC). A signal line is formed in a pattern is formed on both sides of the flexible printed circuit (FPC) for inputting an electrical signal. A plurality of wound driving coils are connected to a first side of the flexible printed circuit (FPC) to electrically connect with the signal line. A yoke is connected to a second side of the flexible printed circuit (FPC).

Abstract: A head drum assembly for a compact-size camcorder such as a digital video camera comprised of a drum cover, stationary and rotating drum, a subcircuit board, a stationary and rotating transformer and a motor stator and rotor. By forming the drum cover, which is attached to the shaft of the rotary drum above the rotary drum, with a conductive material such as an aluminum alloy, the need for a conductive bushing member and earthing plate for the insulating drum cover of the head drum assembly can be omitted, resulting in an overall simpler. As the number of components and manufacturing steps decreases, the manufacturing costs decrease and productivity increases.

Abstract: A reel driving apparatus and a magnetic recording and reproducing device including the reel driving apparatus, where the reel driving apparatus includes: a driver including at least a portion protruding under a deck chassis; a power transmitting unit transmitting a power to the driver; a power changing unit gearing with the driver and selectively transmitting a power to a plurality of reel tables according to a direction along which the driver rotates; and a fixing unit supporting the driver.

Abstract: A head drum assembly for a compact-size camcorder such as a digital video camera comprised of a drum cover, stationary and rotating drum, a subcircuit board, a stationary and rotating transformer and a motor stator and rotor. By forming the drum cover, which is attached to the shaft of the rotary drum above the rotary drum, with a conductive material such as an aluminum alloy, the need for a conductive bushing member and earthing plate for the insulating drum cover of the head drum assembly can be omitted, resulting in an overall simpler. As the number of components and manufacturing steps decreases, the manufacturing costs decrease and productivity increases.

Abstract: A head drum assembly of a tape recorder in which an inner race and an outer race of an upper bearing are press-fitted onto a shaft and a rotary drum, respectively, thereby applying a preload. A resilient body, such as a compressed coil spring, is disposed between a lower bearing disposed between the rotary drum and the shaft and a stationary drum. The resilient body upwardly presses the inner race of the lower bearing, thereby applying a preload. Accordingly, the head drum assembly of the tape recorder provides enhanced assembling efficiency and reduced manufacturing costs.

Abstract: A head drum assembly for a compact-size camcorder such as a digital video camera comprised of a drum cover, stationary and rotating drum, a subcircuit board, a stationary and rotating transformer and a motor stator and rotor. By forming the drum cover, which is attached to the shaft of the rotary drum above the rotary drum, with a conductive material such as an aluminum alloy, the need for a conductive bushing member and earthing plate for the insulating drum cover of the head drum assembly can be omitted, resulting in an overall simpler. As the number of components and manufacturing steps decreases, the manufacturing costs decrease and productivity increases.

Abstract: A reel driving apparatus and a magnetic recording and reproducing device including the reel driving apparatus, where the reel driving apparatus includes: a driver including at least a portion protruding under a deck chassis; a power transmitting unit transmitting a power to the driver; a power changing unit gearing with the driver and selectively transmitting a power to a plurality of reel tables according to a direction along which the driver rotates; and a fixing unit supporting the driver.

Abstract: Disclosed is a head drum assembly of a tape recorder. An elastic body is mounted between upper and lower bearings as preloading means, in which the upper and lower bearings are interposed between a rotary drum and the shaft. As a result, the elastic body elastically biases the inner races of the upper and lower bearings upwardly and downwardly, respectively, whereby preload can be applied to each of the upper and lower bearings.

Abstract: A head drum assembly comprises a stationary drum, a rotary drum, and a self-compensating dynamic balancer. The stationary drum is fixed to a shaft, and the rotary drum is rotatably mounted to the shaft so that it faces the stationary drum. The rotary drum supports a magnetic head. The self-compensating dynamic balancer automatically compensates for any eccentricity between the rotational axis and the centroid of the rotary drum by using the centrifugal force of the rotary drum being rotated.

Abstract: A magnetic recording and reproducing device for enhancing the operation efficiency by reducing the number of parts and providing an improved structure is provided. The magnetic recording and reproducing device includes a pole base assembly for loading a magnetic tape by guiding the magnetic tape so that the magnetic tape is wound on a head drum and for unloading the magnetic tape by returning the magnetic tape from the head drum; a deck having a guide rail formed thereon, the guide rail including an insertion recess into which the pole base assembly is inserted and a slit connected to the insertion recess to guide the loading and unloading of the pole base assembly; and a deviation preventing unit for preventing the deviation of the pole base assembly inserted into the guide rail.

Abstract: A head drum assembly and a method for cutting a rotary drum for the head drum assembly are provided. The head drum assembly includes a stationary drum fixed around a shaft, and a rotary drum rotatably mounted around the shaft. A magnetic head unit is mounted to the rotary drum and has a magnetic head. A head distancing groove is formed on a bottom part of the rotary drum in a circumferential direction of the rotary drum to substantially prevent the magnetic head from contacting the rotary drum. At least one head window is connected with the head distancing groove. The magnetic head protrudes out through the head window. Because the head distancing groove is formed in a circumferential direction of the shaft of the rotary drum, the head distancing groove may be processed by lathing. Thus, the number of processes required to form the rotary drum may be reduced, thereby saving manufacturing costs.

Abstract: A head drum assembly of a magnetic recording and reproducing apparatus includes a fixed drum secured to a shaft and a rotary drum rotatably fitted on the shaft to be opposite to the fixed drum. A motor rotor is supported in the rotary drum. A stator is installed on the fixed drum to be opposite to the motor rotor. A yoke is secured to the fixed drum so that a predetermined air gap is provided between the stator and the yoke.

Abstract: A stator assembly of a motor for a head drum is provided to generate a driving force disposed opposite to a motor rotor. The stator motor includes a double sided flexible printed circuit (FPC). A signal line is formed in a pattern is formed on both sides of the flexible printed circuit (FPC) for inputting an electrical signal. A plurality of wound driving coils are connected to a first side of the flexible printed circuit (FPC) to electrically connect with the signal line. A yoke is connected to a second side of the flexible printed circuit (FPC).

Abstract: An apparatus and method for compensating a gray-scale CCT in an LCD are provided. In the apparatus, a camera captures an external image, a memory stores the captured image and other image data, and a video processor compensates the correlated color temperature (CCT) of the image received from the camera and the image data read from the memory according to a gray-scale CCT compensation control signal, and outputs a compensated RGB signal. A display receives the compensated RGB signal and displays the image on the LCD according to the RGB colors. A controller controls the video processor by the gray-scale CCT compensation control signal for the image data received from the camera and the memory.