Abstract: An embodiment solid electrolyte includes a first compound and a second compound. The first compound is represented by a first chemical formula Li7-aPS6-a(X11-bX2b)a, wherein X1 and X2 are the same or different and each represents F, Cl, Br, or I, and wherein 0<a?2 and 0<b<1, and the second compound is represented by a second chemical formula Li7-cP1-2dMdS6-c-3d(X11-eX2e)c, wherein X1 and X2 are the same or different and each represents F, Cl, Br, or I, wherein M represents Ge, Si, Sn, or any combination thereof, and wherein 0<c?2, 0<d<0.5, and 0<e<1.

Abstract: A fluid level measurement system using a buoyant body includes a guide part installed in a direction perpendicular to the bottom surface of a fluid storage tank, and provided with a space in which a fluid can move therein; a buoyant body inserted into the guide part, and configured to float along the surface of the fluid inside the guide part; and a measurement part coupled to the top end of the guide part, and configured to measure the level of the surface of the fluid inside the fluid storage tank by transmitting a signal toward the buoyant body in the inner space of the guide part and then receiving a signal reflected from the buoyant body.

Abstract: A brush head assembly for a vacuum cleaner having an improved structure. The brush head assembly has a brush head body having a triangle structure including a vertical plane to which an upholstery brush is attached, a lower plane horizontally which is formed at a lower portion of the vertical plane and having a dusting brush attached thereunder, and an inclined plane which is formed between the vertical plane and the lower plane, has a connecting pipe integrally formed on the inclined plane of the brush head body and extending upward at an angle of 90 degrees with respect to the inclined plane, and a neck pipe having a front end portion having a hemisphere shape which is inserted into the connecting pipe, a rear end portion which is inserted into an extension bar, and an inlet hole which is formed below the hemisphere shaped front end portion.

Abstract: A vacuum cleaner having a cord fixing apparatus. The vacuum cleaner has a body having a rear wall having an opening, a brush assembly connected to the body through a flexible hose and making contact with a floor, for sucking dust and impurities, a blower assembly which is installed at an inner side of the body, for generating a suction force, an extensible cord for supplying an external electric power to the blower assembly, a reel installed at an inner side of the body, for winding the cord, a rectangular-shaped plate for fixing the cord, a fixing rib for hingedly supporting the rectangular-shaped plate, an elastic material for biasing the rectangular-shaped plate to allow the rectangular-shaped plate to make contact with the cord, and a supporting rib for supporting the elastic material to allow the elastic material to apply a biasing force to the rectangular-shaped plate.

Abstract: Disclosed is an apparatus in which various types of power control switches are selectively fixed to a vacuum cleaner. The apparatus for fixing a power control switch to a vacuum cleaner according to the present invention includes a pair of first bosses for fixing a first power control switch which is selected from the various types of power control switches to a body of the vacuum cleaner, and a pair of brackets which are integrally formed together with the first bosses, respectively, for enclosing and supporting the first power control switch. The apparatus also includes a pair of second bosses for fixing a second power control switch which is selected from the various types of power control switches to the body of the vacuum cleaner.

Abstract: Disclosed is a sound absorbing assembly for a vacuum cleaner, which has a simple internal structure and a low manufacturing cost and is convenient to assemble. A front cap of the sound absorbing assembly supports a front end of a motor assembly and alleviates a vibration which is generated during the operation of the motor assembly. A first taper portion extends radially inwards from an inner end of the front cap. A plurality of engaging protrusions are formed on an outer periphery of the first taper portion. Motor assembly is inserted into the inner end of the front cap at a front end thereof. An air guide encloses a part of a half rear portion of the motor assembly and guides air exhausted from the motor assembly. A rear casing encloses the motor assembly and the air guide. The rear casing is engaged with the inner end of the front cap at an opening end thereof. For this purpose, a second taper portion is formed at an opening end of the rear casing.

Abstract: Disclosed is an indicator device for visually denoting the amount of filled dust in a dust container of a vacuum cleaner. The indicator device operates based on a vacuum pressure difference created between an air suction port and an outlet of the vacuum cleaner. When a vacuum pressure difference is created between the air suction port and the outlet of the vacuum cleaner, a disc-shaped colored film and a circular rotating member positioned in an upper cap of the indicator device receive an atmosphere air from the exterior of the indicator device and denotes the amount of dust filled in the dust container. For this purpose, a colored film is separated by 3.times.N (N is an integer) times and colored in three primary colors of light of red, green and blue or in three primary colors of red, yellow and blue.

Abstract: Disclosed is a wheel of a vacuum cleaner which can be easily assembled and disassembled. The wheel has a hollow cylindrical hub incorporated with a cleaner body, a roller supporting the cleaner body while rolling on a floor, a support member, and a cap. The support member and the cap are fixed by a plurality of key protuberances and snap protuberances formed on the cap. The roller is rotatably supported by the support member while being in sliding contact with a plurality of ridges formed on a cylindrical outer surface of a support ring of the support member. The wheel enables a vacuum cleaner to be minimized in size.

Abstract: Disclosed is an indicator device for visually in detail denoting the amount of filled dust in a dust container of a vacuum cleaner with time. The indicator device operates based on a vacuum pressure difference created between an air suction port and an outlet of the vacuum cleaner. A first plunger and a second plunger slidablely positioned in a first cylinder primarily decrease the vacuum degree in a dust collecting compartment and continuously display the amount of filled dust in the dust container. For this purpose, the first plunger is colored red and the second plunger is colored green. A third plunger slidablely positioned in a second cylinder secondarily decreases the vacuum degree in a dust collecting compartment. The user of the vacuum cleaner can notice the operating state of the vacuum cleaner or the replacement time of the dust container by observing the first plunger and the second plunger through a transparent window installed at a hood of the vacuum cleaner.

Abstract: Disclosed is a cleaner having a switch button for operating a power on/off switch and a cord-winding unit, which comprises a switch button for operating the power on/off switch and the cord-winding unit by performing seesaw movements of the switch button, and a body having a switch button receiving recess for receiving the switch button therein, to thereby enable the assembly processes of the button to become simpler and require less of a time period therefor.