Abstract: A diffractive deflection beam scanning system including: a plurality of light sources; a deflection disc rotatably mounted over the light sources, having patterns capable of diffracting and deflecting beams emitted from the light sources; a plurality of first reflecting mirrors for changing the traveling paths of beams diffracted and deflected by the deflection disc; a plurality of second reflecting mirrors for reflecting the beams reflected by the first reflecting mirrors in a beam scan direction, wherein the light sources are disposed in a straight line along a bisecting line of the deflection disc, perpendicular to the beam scan direction, and the second reflecting mirrors are arranged over the center of the deflection disc at different heights.

Abstract: A laser scanning unit (LSU) in a structure capable of radiating heat generated by a light source. The LSU includes at least one light source, a driving source for providing rotational force, and a deflection disk installed on a rotary shaft of the driving source, for diffracting and deflecting light incident from the light sources. The deflection disk has at least one radiating portion which is depressed in and/or protrudes from the surface of the deflection disk facing the light source and induces air flow by contact with air, such that the heat generated by the light sources is radiated by the air flow induced due to the radiating portion.

Abstract: A multi-laser scanning unit (LSU) in which scanning lines incident parallel onto a photoreceptor have the same scanning direction. The multi-laser scanning unit includes: a driving source for providing a rotatory force; a deflection disk installed around a rotary shaft of the driving source having a plurality of sectors each with a hologram pattern for diffracting and deflecting incident light, for scanning light through rotation; a plurality of light sources installed facing one surface of the deflection disk for irradiating a plurality of light lines onto predetermined points of the deflection disk; and a light path changing portion for changing traveling paths of the plurality of scanning lines formed by the rotation of the deflection disk, wherein the plurality of light sources are arranged such that two incident points which are the farthest from each other among the plurality of incident points formed on the deflection disk form 180° with the center point of the deflection disk.

Abstract: A multi-laser scanning unit (LSU) in which scanning lines incident parallel onto a photoreceptor have the same scanning direction.

Abstract: A beam scanning apparatus of an electrophotographic color printer having first and second light sources, and a deflecting unit including a driving source and first and second beam deflectors. The driving source has a rotation shaft and the first and second beam deflectors are coaxially installed on the rotation shaft and respectively deflect and scan beams of light emitted from the first and second light sources. First and second beam correcting units are arranged along the path of light between the deflecting unit and a photoreceptor and respectively correct the beams deflected by the first and second beam deflectors.

Abstract: In a beam scanning apparatus of an electrophotographic color printer, at least two beam deflectors, each having a deflection disk consisting of at least two sectors and a driving source for rotating the deflection disk, deflect and scan an incident beam. The deflection disk has a pattern formed thereon for diffracting and scanning the incident beam. A plurality of light sources, arranged between the beam deflector and a photoreceptor, emit light to the deflection disk. A beam path changing unit changes a proceeding path of the beam deflected by the respective beam deflectors to proceed toward the photoreceptor. A beam correcting unit, arranged between the respective beam deflectors and the photoreceptor, corrects the input beam having its path changed by the beam path changing unit.

Abstract: A beam scanning apparatus includes an optical source, a beam deflector having a deflection disk which is comprised of a plurality of sectors patterned to diffract a beam emitted from the optical source and has a reflective layer for reflecting an incident beam formed on the bottom surface of the beam deflector, and a driving source for rotating the deflection disk. A beam corrector is provided for correcting the beam deflected by the beam deflector.

Abstract: A belt steering apparatus for controlling inclined movement of the belt in, for example, a printer. The belt steering apparatus includes a first frame supporting a cylindrical roller having a predetermined portion which contacts an endless rotating belt, a second frame hinged to the center of the first frame, and a sliding member capable of sliding linearly, installed at one side of the first frame, and having an upper surface supporting a rotary shaft formed at one end of the roller, inclined from the direction of linear movement by a predetermined angle. A rack gear is provided on one side of the sliding member, and a pinion gear is connected to a rotary shaft of a motor mounted to the first frame, contacting a predetermined portion of the rack gear to linearly move the sliding member. Thus, the roller is easily tilted to forcibly raise and lower one side of the roller, and the pressure transferred from the belt can be withstood reliably.

Abstract: A frame structure of a printing apparatus is provided with a main frame having a developer unit and a paper supply and output unit, a subframe installed in the main frame, having a printing unit, and a damping member installed between the main frame and the subframe, for absorbing vibration which would otherwise be transferred from the main frame to the subframe. Thus, the damping member can prevent the vibration generated by the developer unit or the paper supply and output unit from being transferred to the printing unit.

Abstract: A multi-beam scanning apparatus includes at least two optical sources, a beam deflector having a deflection disc with a plurality of sectors for diffracting and transmitting incident beams, and a driving source for rotating the deflection disc, for deflecting and projecting beams emitted from the optical sources. A beam corrector installed along a light path, for correcting the beams deflected by the beam deflector.

Abstract: An electrophotographic printer including a backup roller for supporting a photosensitive belt, a pressing roller for pressing a supplied paper, a transfer roller selectively contacting or being separated from the backup roller and the pressing roller while moving forward or backward between the backup roller and the pressing roller, and a driving unit for moving the transfer roller forward and backward. The transfer roller, the backup roller and the pressing roller are easily aligned with accuracy, and the impacts occurring when the rollers contact each other and are separated from each other are made less severe.

Abstract: A fluid bearing apparatus includes a thrust load supporting portion formed between an external side surface of a fixing shaft and an internal side wall of an opening in a bushing; the surface and wall facing each other. The thrust load supporting portion includes a ball inserting groove formed on the external side surface of the fixing shaft and/or the internal side wall of the bushing and a ball inserted into the ball inserting groove. The upper end portion of the shaft is lower than the upper end portion of the bushing. Since the thrust load is supported by the balls instead of by the upper end portion of the fixing shaft, it is possible to prevent movement of the fixing shaft when the fluid bearing apparatus starts to rotate. The frictional resistance of the upper end portion of the fixing shaft can be reduced when the fluid bearing apparatus starts to rotate and stops its rotation.

Abstract: A clothes washing machine includes a water tub, a spin basket, and a clothes agitator. A vertical dehydrating shaft is fixed to the spin basket, and a laundering shaft extends coaxially within the dehydrating shaft. Upper and lower ends of the laundering shaft are connected to the agitator and a motor respectively, whereby rotation of the motor is always transmitted to the agitator. In order to selectively connect the dehydrating shaft to the laundering shaft (e.g., during a spin-drying operation), a connecting gear is mounted on the dehydrating shaft for rotation therewith and for vertical movement relative thereto. A power-driven actuator is provided for selectively moving the connecting gear up or down. When the connecting gear moves down, lower teeth thereon become operably connected to the motor so that the dehydrating shaft and laundering shaft rotate together.

Abstract: A fluid bearing apparatus having an increased contact area between a body and a bushing and having a compact size. In the fluid bearing apparatus according to the present invention, a body extends from a shaft fixed to a lower bearing bracket in a lengthwise direction, which has a conical groove at one end and a truncated cone at the other end. An upper bushing includes a recess for receiving the one end of the body and having a conical protrusion formed therein. The conical protrusion is inserted into the conical groove of the body. A lower bushing has a recess receiving the other end of the body and a through hole extending through the lower bushing. The shaft is slidably inserted into the through hole. The upper bushing is separately combined with the lower bushing. Accordingly, the bushing which receives the body, may be decreased in volume, so that a motor to which the fluid bearing apparatus is applied, can be reduced in a total size.

Abstract: A reel table moving mechanism selectively receives tape cassettes having different sizes. The mechanism includes a deck member in which a head drum and a tape guiding unit are installed and having first and second openings formed to be spaced from each other, each having a predetermined length. A pair of reel tables, operative to move along the first and second openings, selectively receive first and second tape cassettes of a different size. Each reel table has a stopper for locking a pair of reels and a releasing lever for releasing the stopper. A pair of first and second reel bases on which the reel tables are mounted are slidably supported to the deck member. First and second shafts are supported by a supporting mechanism at one side of each of the first and second openings and are slidably connected to the first and second bases. A mechanism moves the first and second reel bases, and first and second releasing devices release each releasing lever of the first and second tape cassettes from being locked.

Abstract: A deck mechanism has a tape-guiding unit including a pinch roller, pole bases, a tension lever and an impedance roller. The tape-guiding unit is interlocked with a master cam gear and a main slide member. The deck mechanism is simple and can be accurately controlled.

Abstract: A cartridge inserting/extracting apparatus for use in a magnetooptical disk player for recording and/or reproducing information of a magnetooptical disk using an optical pickup and magnetic head uses a cartridge holder rotationally opened and/or closed on a deck for loading a minidisk, and includes an extracting member for extracting the minidisk received in the cartridge holder, a locking release member, and a locking lever member. The apparatus prevents a disk from being removed in a state where the magnetic head will be damaged.