Abstract: A method of manufacturing a gas cylinder according to an embodiment of the present invention may include applying a sealant to at least a portion of inner surface of a hollow spindle; inserting a cylinder assembly contacting the inner surface of the spindle through an inlet of the spindle and forming a sealant film on an inner surface of the spindle by frictionally applying the sealant to the inner surface of the spindle; and hardening the sealant film to form a cured film cylinder in contact with the inner surface of the spindle.

Abstract: A height-adjustable desk includes a base, a top board, a link mechanism, a height-adjusting member, and an operating member. The top board is configured to be vertically elevated with respect to the base. The link mechanism is disposed between the base and the top board so as to support the top board such that the top board may be elevated, the link mechanism including a plurality of link members. The height-adjusting member is formed to be extendable at a desired length and determining a height of the top board with respect to the base according to a length thereof. The operating member fixes the height-adjusting member so that the height-adjusting member maintains the desired length.

Abstract: A gas cylinder includes: a base tube including a cavity; a spindle inserted into the cavity and performing a reciprocating motion in a longitudinal direction of the base tube; a cylinder mounted in the spindle and charged with gas; a piston dividing the cylinder into an upper chamber and a lower chamber; a valve portion sealing an upper portion of the cylinder and including a pipe holder having a cavity through which the gas is introduced; a flow prevention portion inserted into the spindle and having an inner surface contacting a surface of the spindle; and a spindle guide disposed between the base tube and the spindle and mounted to include at least a portion of the flow prevention portion.

Abstract: The present invention relates a height-adjustable desk including: a base; a top board provided so as to be vertically elevated with respect to the base; a link mechanism disposed between the base and the top board so as to support a top board such that the top board may be elevated and including a plurality of link members; a height-adjusting means formed to be extendable at a desired length and determining the height of the top board with respect to the base according to a length thereof; and an operating means for fixing the height-adjusting means so that the height-adjusting means maintains the desired length.

Abstract: A spindle motor includes: a rotor; a rotating shaft whose one end is combined with the rotor; a sleeve bearing whose inner circumference rotatably supports the outer circumferential surface of the rotating shaft, and on the outer circumferential surface of which at least one oil circulation recess is provided along the lengthy direction of the sleeve bearing; a bearing housing having a first recess accommodating the sleeve bearing and a second recess that supports the other end of the rotating shaft at a central portion of the first recess, and made of a resin; and a number of protrusions that are protrudingly formed at a gap radially spaced apart from each other around the rotating shaft so that a plurality of guide grooves through which oil passes are formed on the bottom of the first recess, and on which the bottom of the sleeve bearing is mounted.

Abstract: Provided is a spindle motor having an electrostatic discharge (ESD) path that can stably discharge electric charges introduced from the outside to a rotating shaft through a base plate, in a structure of forming a bearing housing by using a resin and insert-molding the base plate. The spindle motor includes: a rotor to the central portion of which one end of a rotating shaft is coupled; a bearing that rotatably supports the rotating shaft; a bearing housing that accommodates the bearing in the inside of a groove and that is made of a resin; and a base plate whose inner circumferential portion is buried and combined in the inside of the bearing housing, wherein part of the base plate is in contact with the bearing to thus discharge externally introduced static electricity through the rotating shaft, bearing, and the base plate.

Abstract: Disclosed are a spindle motor and a method of manufacturing the same. A base plate is integrated with a bearing housing using an insert molding or insert injection method at the same time when the bearing housing is made of resin, thereby being capable of securing the verticality of a bearing and a pivot assembled with the bearing housing and the base plate, reducing the manufacturing cost, and improving the efficiency of a manufacturing process. The motor includes a rotor, a pivot configured to have one end connected to the rotor, a bearing configured to rotatably support the outer circumferential face of the pivot, and a bearing housing made of resin and configured to comprise a first concave groove for receiving the bearing and a second concave groove for supporting the other end of the pivot.

Abstract: The present invention relates to a column unit for a chair, wherein the column unit for a chair is compact and can improve durability against lateral forces. The present invention relates to a column unit for a chair, in which the height thereof is controlled by upward and downward movements of a spindle assembly, wherein the column unit comprises: an outer pipe comprising an inclined portion of which the diameter gradually becomes larger as it approaches a front end thereof; an inner pipe which is inserted into the outer pipe to form a space portion between the inclined portion and the inner pipe; and a spindle guide which is inserted into the inner pipe to guide the upward and downward movements of the spindle assembly.

Abstract: Provided is a spindle motor having an electrostatic discharge (ESD) path that can stably discharge electric charges introduced from the outside to a rotating shaft through a base plate, in a structure of forming a bearing housing by using a resin and insert-molding the base plate. The spindle motor includes: a rotor to the central portion of which one end of a rotating shaft is coupled; a bearing that rotatably supports the rotating shaft; a bearing housing that accommodates the bearing in the inside of a groove and that is made of a resin; and a base plate whose inner circumferential portion is buried and combined in the inside of the bearing housing, wherein part of the base plate is in contact with the bearing to thus discharge externally introduced static electricity through the rotating shaft, bearing, and the base plate.

Abstract: Provided is a high-speed rotating spindle motor that achieves a smooth circulation of oil without any congestion regions of oil on an oil path taking place in a bearing housing.

Abstract: The present invention relates to a motor, particularly, to a spindle motor and a method of manufacturing the same, in which a base plate is integrated with a bearing housing an insert molding or insert injection method at the same time when the bearing housing is made of resin, thereby being capable of securing the verticality of a bearing and a pivot assembled with the bearing housing and the base plate, reducing the manufacturing cost, and improving the efficiency of a manufacturing process. The motor of the present invention includes a rotor, a pivot configured to have one end connected to the rotor, a bearing configured to rotatably support the outer circumferential face of the pivot, and a bearing housing made of resin and configured to comprise a first concave groove for receiving the bearing and a second concave groove for supporting the other end of the pivot.

Abstract: Provided is a spindle motor on which an optical disc is put, rotated and operated. The spindle motor includes a rotor, a stator, a stop washer, and a cap. The cap is put on a thrust supporter that supports a rotation shaft of the rotor, and the cap is pressed into a bearing housing and is closely attached to the bearing housing so that the cap can be easily, closely attached to the bearing housing and due to a press fit force, the cap can be coupled to the bearing housing without formation of a gap between the bearing and the bearing housing and leakage of oil can be prevented, and a press fit force of the bearing and a press fit force of the cap itself act on the cap so that the cap can be prevented from upward separation from the bearing housing.

Abstract: A gas cylinder includes a spindle vertically reciprocating along a center shaft, a cylinder installed in the spindle and filled with gas, a piston member sectioning an inside of the cylinder into an upper portion and a lower portion, and a valve member sealing an upper end of the cylinder and controlling flow of the gas filling the inside of the cylinder. The valve member includes a pipe holder sealing an upper end of the cylinder, an open pin inserted in the pipe holder by penetrating the pipe holder, and a sealing member provided at an end portion of the open pin to contact the pipe holder. When the open pin is inclined by a predetermined angle with respect to the center shaft, a gap is formed between the sealing member and the pipe holder so that the flow of the gas is controlled.

Abstract: A cable operated gas cylinder comprises: a base tube; a spindle which is inserted at hollow part in said base tube; a cylinder which is mounted within said spindle; a piston dividing the gas-filled space within said cylinder into upper part and lower part; a pipe holder sealing airtight the upper part of said cylinder; a gas opening/closing pin which is mounted penetratingly through central part of said pipe holder and for controlling getting in and out of the gas filled within said cylinder; a release arm for controlling the opening/closing of said gas opening/closing pin; a cable for controlling turning of said release arm when being pulled by external force; and a taper holder which receives said release arm therein and rotationally intervenes within said spindle, wherein said release arm and said taper holder are capable of rotating together as said cable rotates.

Abstract: Provided is a spindle motor on which an optical disc is put, rotated and operated. The spindle motor includes a rotor, a stator, a stop washer, and a cap. The cap is put on a thrust supporter that supports a rotation shaft of the rotor, and the cap is pressed into a bearing housing and is closely attached to the bearing housing so that the cap can be easily, closely attached to the bearing housing and due to a press fit force, the cap can be coupled to the bearing housing without formation of a gap between the bearing and the bearing housing and leakage of oil can be prevented, and a press fit force of the bearing and a press fit force of the cap itself act on the cap so that the cap can be prevented from upward separation from the bearing housing.

Abstract: The present invention relates to a column unit which connects a chair sheet to a base in which a wheel is installed. The present invention provides a column unit which comprises a base tube having a lower end portion vertically fixed to a base of a chair and having the hollow interior; a spindle having the interior filled with a pressure gas and divided to upper and lower chambers by a piston, an upper end portion of a piston rod being connected to the piston, a lower end portion of the piston rod being rotatably installed at the lower end portion of the inner side of the base tube, the upper and lower chambers are communicated by a bypass, a valve being installed at the bypass; and a guide sleeve installed between the base tube and the spindle and engaged with the spindle to be integrally moved upward and downward together with the spindle.