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 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 stator assembly for a drum motor to generate a driving force in a motor rotor. A frequency printed circuit (FPC) is patterned with a plurality of main driving coils, and a yoke is connected to the FPC. The FPC may include a first substrate and a second substrate that are preferably attached by adhesive to each other. An upper side of the first substrate is patterned with the plurality of main driving coils. A frequency generation coil and a phase generation coil are patterned on the upper side of the first substrate to control driving velocity of the drum motor and a rotational position of the stator assembly, respectively. A cover layer may be attached to the upper side of the first substrate to shield the coils patterned on the first substrate. An upper side of the second substrate, which faces the first substrate, is patterned with sub driving coils. The sub driving coils are formed to substantially correspond to the main driving coil to enhance a driving force of the main driving coils.

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 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 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: 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.

Abstract: A method for assembling a head-drum assembly for a magnetic recording/reproducing apparatus is provided. The head-drum assembly is assembled by inserting a shaft to a fixed drum first, setting up a motor stator in the fixed drum, and putting a rotary drum assembly and drum cover assembly into the shaft sequentially. The method can reduce the number of part to be abandoned due to a defect caused in the assembly process by performing a process of assembling the shaft and the fixed drum first, an area in which most defects are caused, and then proceeding to the subsequent assembly processes.

Abstract: A head drum assembly and method of a magnetic recording/reproducing apparatus are disclosed. In the assembly, for application of a pre-load on the upper and the lower bearings, the upper and the lower bearings are installed in a loosely fitting manner on the shaft. An elastic member for applying a load on an inner ring of either of the upper and the lower bearings is provided so that simplification of the manufacturing process of the head drum assembly, cost reduction, and productivity improvement are achieved.

Abstract: A deck plate integrally forming the drum base and the guide rail, and a magnetic recording/playing apparatus having the same are disclosed. The deck plate has a chassis integrally forming a drum base for slopingly supporting a head drum assembly in a predetermined angle together with a guide rail for guiding at least one pole base assembly.

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: 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 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: A noise prevention apparatus and a magnetic recording and reproducing apparatus having the same are provided to such that a microphone unit records sound produced from outside the magnetic recording and reproducing apparatus in an optimum state. The noise prevention apparatus includes a noise damping part installed adjacent to at least one noise source that produces a noise when the image and sound signals are recorded and reproduced for damping and discharging the noise produced from the noise source. The noise damping part includes a noise collecting member for collecting the noise and a noise damping member for damping and discharging the noise collected by the noise collecting member to the outside. The noise produced from the noise source when the image and sound signals are recorded and reproduced is collected by the noise collecting member and then damped to a minimum size by the noise damping member, so that the microphone unit may record the sound in the optimum state.

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 magnetic recording/reproducing apparatus includes a shaft on which a rotary drum is rotatably supported, and a fixed drum firmly fixed to the shaft and supported on a main deck. The fixed drum includes a fixed drum body facing the rotary drum and a fastening part extending from a lower side of the fixed drum body. The fastening part is supported by the main deck. A flange part extends from an outer circumference of the fastening part and is coupled to the main deck by screws.

Abstract: A magnetic recording/reading apparatus comprises a head drum disposed on a deck to record or read information on/from a magnetic tape. An FPC fixing member is disposed on the deck to fix an FPC having a signal line to transmit a signal. The apparatus is configured to prevent noise generated between the head drum and the magnetic tape from transmitting to the outside and to a microphone. Thus, quality of recorded sound is improved.

Abstract: A magnetic recording and reading apparatus includes a noise preventing member provided to at least one of a deck and a holder to cover an upper side of a head drum. Noise generated by the contact between the head drum and the magnetic tape is substantially prevented from being transmitted outside of the magnetic recording and reading apparatus and to a microphone in recording operation, thereby improving the quality of recorded sound.