Abstract: An improved cleaning robot that uses a simple structure to sense an obstacle is disclosed. The cleaning robot includes a robot main body comprising a driving unit to drive the cleaning robot, and a cleaning unit to remove dust, a bumper unit which is movably mounted in the robot main body to protect the robot main body from collision with an obstacle, a sensor unit which supports the bumper unit movably in a plurality of directions to sense the collision of the bumper unit and the obstacle, and a control unit which controls the driving unit on the basis of a signal sensed by the sensor to avoid the obstacle.

Abstract: A robot cleaner system is disclosed. The robot cleaner system includes a robot cleaner to carry out a cleaning operation while automatically traveling around along a surface to be cleaned, and a charging station connectable with the robot cleaner to charge a charging battery mounted in the robot cleaner with electricity. The charging station includes a setting switch to selectively set up a value of threshold height.

Abstract: An apparatus for inducing an automatic docking of a robot is disclosed. The apparatus induces connecting terminals of the robot having a receiving unit to connect with docking terminals disposed on one surface of a docking object, and includes a plurality of transmitting units disposed on the same surface as that of the docking object on which the docking terminals are disposed. The plurality of transmitting units is arranged in different angles to one another to transmit signals in different directions to one another, respectively.

Abstract: A vacuum cleaner comprises a cleaner body where a dust separator is mounted to extract dust from dust-laden air. A dust receptacle is detachably mounted in the cleaner body. A locking unit locks the dust separator and the dust receptacle together. In an exemplary embodiment, an opening unit rotates the dust separator by a predetermined angle when the dust separator and the dust receptacle are unlocked.

Abstract: A control method for a robot cleaner that includes: driving a driving part to move the robot cleaner by a predetermined distance in an opposite direction to a proceeding direction thereof when a bumper sensor detects a collision with an obstacle, measuring the number of times in which the robot cleaner repeats moving in real-time, comparing the measured number with a predetermined reference number, and stopping the robot cleaner when the measured number is more than the reference number. With this method, the robot cleaner can diagnose a breakdown of the bumper sensor to stop the cleaner, and inform a user of the breakdown.

Abstract: A vacuum cleaner having a blade, which rotates, is disclosed. The vacuum cleaner includes a body, a blade attached to a lower end of the body, and a rotating unit attached to the body so as to rotate the blade.

Abstract: Disclosed is a multi-cyclone dust separating apparatus including a primary cyclone for centrifugally separating impurities from the sucked air, a plurality of secondary cyclones for centrifugally separating impurities from the air supplied from the primary cyclone, inflow guide paths for guiding the air discharged from the primary cyclone to the plurality of secondary cyclones, and discharge guide tubes partially inserted into the secondary cyclones, for externally discharging the air of the secondary cyclones. The discharge guide tubes include cylindrical portions having a predetermined height, and intercepting portions extended from the bottom ends of the cylindrical portions by a predetermined length, for preventing the air supplied to the secondary cyclones from being directly discharged to the discharge guide tubes.

Abstract: Disclosed are a dust receptacle fixing/separating apparatus that fixes and separates a dust receptacle with respect to a cyclone unit, and a cyclone dust collecting device having the same. The dust receptacle fixing/separating apparatus comprises a fixing/separating handle, a locking/unlocking part, and a fixing part. The fixing/separating handle pivots between a first position and a second position, the first position in which the cyclone unit and the dust receptacle are fixed to each other and the second position in which the cyclone unit and the dust receptacle can be separated from each other. The locking/unlocking part fixes and releases the fixing/separating handle when the fixing/separating handle is in the first position. The fixing part pivotably mounting the fixing/separating handle releases connection between the cyclone unit and the dust receptacle when the fixing/separating handle is in the second position.

Abstract: A vacuum cleaner comprises a cleaner body where a dust separator is mounted to extract dust from dust-laden air. A dust receptacle is detachably mounted in the cleaner body. A locking unit locks the dust separator and the dust receptacle together. In an exemplary embodiment, an opening unit rotates the dust separator by a predetermined angle when the dust separator and the dust receptacle are unlocked.

Abstract: The present invention relates to a fluorescent tube structure, which fluoresces when connecting electric power, including a base plate and an upper cover forming a enclosed discharge chamber, wherein pellicles applied inside to enable an illuminant to project to the curved surface of the upper cover and then be reflected to the base plate, which enhances illumination and also reduces illumination loss to the lateral, thereby improving illuminant efficiency. The present invention can be used as a backlight on illuminating and electronic display devices.

Abstract: A suction brush for a vacuum cleaner has a bottom plate rotatably disposed under a cover to contact with a cleaning surface. Even when the rear end of the suction brush separates apart from the cleaning surface during the cleaning operation, the bottom plate maintains the close contact with the cleaning surface by rotating downward, thus enhancing the cleaning efficiency.

Abstract: The present invention relates to a fluorescent tube structure, which fluoresces when connecting electric power, including a base plate and an upper cover forming a enclosed discharge chamber, wherein pellicles applied inside to enable an illuminant to project to the curved surface of the upper cover and then be reflected to the base plate, which enhances illumination and also reduces illumination loss to the lateral, thereby improving illuminant efficiency. The present invention can be used as a backlight on illuminating and electronic display devices.

Abstract: A light emitting panel module utilized to provide a light emitting source for a back-lighted panel, and having a modularized structure. Upon vacuum pressing and molding under a high temperature, a sheet light emitting tube is formed thereof, and enables forming of a plurality of variant shapes according to requirements of actual practical applications. The light emitting tube is further adapted to provide uniform light color and long life usage having an upper panel and a lower panel, with the upper panel being formed as the light emitting tube from variant shape arrangements according to requirements of actual practical applications. The lower panel is bonded to the upper panel, thereby forming a sealed light emitting panel module. A space between the upper panel and the lower panel forms a hollow receptacle space, whereby providing filling of a noble gas therein, thus enhancing lifespan of the light emitting tube.

Abstract: A dust container having a handle which self recovers and a vacuum cleaner having the same, to thereby conveniently pull the dust container from a cleaner body. The dust container includes a container body and a handle pivotably disposed at the dust container. A guide incline slidably contacts with and resiliently deforms the handle in a pivotal axis direction while the handle pivots. A fixing rib is disposed at the guide incline to restrain a pivoting angle of the handle.

Abstract: An investment consulting system executable on a computer can provide personalized investment service to a plurality of users through a network. The system includes an investment performance estimating part for periodically calculating a performance index based on a return and a risk for each investment. It also includes a client's attitude analysis part for calculating performance ranks by quantitatively grasping and synthesizing a client's investment attitude received from a communicating part, and obtaining a client index by calculating the performance ranks in terms of the same dimension as the investment performance. An asset allocation part calculates investment allocations for each kind of investment in accordance with the client's performance ranks, and reports the investment allocations to the client through the communication part.

Abstract: Methods for annealing and pickling high manganese cold rolled steel sheets for use in automobiles and electronic panels in which a superior formability and high strengths are required are disclosed. That is, the invention provides a method for annealing a cold rolled high manganese steel sheet, in which, after cold-rolling a high manganese steel of Fe--Mn--Al--C series, the annealing atmospheric gas is adjusted during an annealing so as to minimize the thickness of a surface oxide layer, and an oxide layer removing agent such as aluminum nitride is spread into the oxide layer, so that the surface oxide layer can be easily removed. The invention further provides a method for pickling a cold rolled high manganese steel sheet, in which the surface oxide layer formed on the cold rolled high manganese steel sheet is uniformly removed with a mild aqueous solution of chloric acid, thereby improving the surface quality of the steel sheet, and saving the pickling facility cost.

Abstract: A high manganese steel having superior hot workability is disclosed, in which small amounts of the alloying elements are added into a high manganese steel of Fe-Mn-Al-C system, so that the rupture strength of the grain boundaries of columnar crystals can be improved, thereby realizing an improved hot workability. Further, a process for manufacturing a high manganese hot rolled steel sheet is disclosed, in which the above mentioned high manganese steel is subjected to be controlled the initial hot rolling conditions during a hot rolling, so that large cracks would not be generated on the edges and on the surface of the hot rolled steel sheet. The process for manufacturing a hot rolled high manganese steel without any cracks includes the following the steps. That is, the process includes the steps of: preparing the ingot or the continuous casting slabs of the conventional Fe-Mn-Al-C steel with one or more elements selected from a group consisting of 0.0005-0.04% of B, 0.0005-0.050% of Ti, 0.0005-0.