An arrangement of a pull-out guide can be fastened to a piece of furniture, and the pull-out guide has a first rail, and a second rail that is movably mounted on the first rail, and a rail synchronization device. The rail synchronization device includes a toothed rack connected to the first rail, a toothed wheel meshing with the toothed rack, and a bearing block connected to the second rail. The toothed wheel is rotatably mounted in the bearing block, and a driver for a drawer drive device, wherein the toothed rack of the rail synchronization device is connected to the driver.

An arrangement of a pull-out guide can be fastened to a piece of furniture, and the pull-out guide has a first rail, and a second rail that is movably mounted on the first rail, and a rail synchronization device. The rail synchronization device includes a toothed rack connected to the first rail, a toothed wheel meshing with the toothed rack, and a bearing block connected to the second rail. The toothed wheel is rotatably mounted in the bearing block, and a driver for a drawer drive device, wherein the toothed rack of the rail synchronization device is connected to the driver.

A server apparatus with a horizontal push-pull operating structure includes a chassis having a base plate and chassis plates with guiding slots; a carrying tray on the base plate and inserted into the chassis plates, the carrying tray having carrying board and side boards having sliding slots formed corresponding to the guiding slots; and an operating structure having a moving arm with a gear rack thereon and a gear sector clamped between the moving arm and the side board and having an addendum engaged with the gear rack and a sliding column inserted into the sliding and guiding slots. When the moving arm is horizontally pushed/pulled relative to the side boards, the gear rack drives the gear sector to rotate, and the sliding column moves inside the sliding slot and drives the carrying tray to move in/out of the base plate respectively under guidance of the guiding slot.

A server apparatus with a horizontal push-pull operating structure includes a chassis having a base plate and chassis plates with guiding slots; a carrying tray on the base plate and inserted into the chassis plates, the carrying tray having carrying board and side boards having sliding slots formed corresponding to the guiding slots; and an operating structure having a moving arm with a gear rack thereon and a gear sector clamped between the moving arm and the side board and having an addendum engaged with the gear rack and a sliding column inserted into the sliding and guiding slots. When the moving arm is horizontally pushed/pulled relative to the side boards, the gear rack drives the gear sector to rotate, and the sliding column moves inside the sliding slot and drives the carrying tray to move in/out of the base plate respectively under guidance of the guiding slot.

An engagement assembly, a drawer, and a refrigerator having same. The engagement assembly comprises a first engagement part matching the drawer and a second engagement part matching a refrigerator body; one of the first and second engagement parts is a gear, and the other one is a rack; the rack has a tooth surface that allows the gear to travel; the rack comprises a main rack and an extension rack; when the drawer is in a closed state, the tooth surface has a first stroke length; when the drawer is in an opening process, the extension rack moves to a travel path of the gear so that the tooth surface has a second stroke length; when the drawer is in a closing process, the extension rack is reset the first stroke length is smaller than the second stroke length. The length of the tooth surface increases in the opening process.

An engagement assembly, a drawer, and a refrigerator having same. The engagement assembly comprises a first engagement part matching the drawer and a second engagement part matching a refrigerator body; one of the first and second engagement parts is a gear, and the other one is a rack; the rack has a tooth surface that allows the gear to travel; the rack comprises a main rack and an extension rack; when the drawer is in a closed state, the tooth surface has a first stroke length; when the drawer is in an opening process, the extension rack moves to a travel path of the gear so that the tooth surface has a second stroke length; when the drawer is in a closing process, the extension rack is reset the first stroke length is smaller than the second stroke length. The length of the tooth surface increases in the opening process.

A datacenter rack for vertically stacking a plurality of electronic devices is provided. The rack has a frame assembly having two vertical support components and a plurality of removeable trays configured to be inserted between and supported by the vertical support components. Each tray has a pair of opposing sides extending parallel to a longitudinal axis and each of the pair of opposing sides has a tensioned adjustment mechanism to shorten a length of each side to compress the tray in the longitudinal axis, with the tensioned adjustment mechanisms providing a tensioning force against the compression. Each tray also has a top surface with a movement facilitating arrangement for facilitating movement of an electronic device along the tray in the longitudinal axis.

An extending hanger assembly, for a wardrobe system having an enclosure and a door pivotable between open and closed positions, includes: a base on which an article support peg is mounted for linear translation; a mechanism operative to move the article support peg linearly relative to the base; and a control link coupling the door to the mechanism, whereby, upon opening and closing of the door, the control link operates the mechanism to translate the article support peg in opposing linear directions. The mechanism operative to move the article support peg linearly relative to the base can be a scissor mechanism having a proximal end extending toward the door and a distal end extending away from the door, wherein the distal end is attached to the base, and the proximal end is attached to a traveling bracket that carries the article support peg.

An extending hanger assembly, for a wardrobe system having an enclosure and a door pivotable between open and closed positions, includes: a base on which an article support peg is mounted for linear translation; a mechanism operative to move the article support peg linearly relative to the base; and a control link coupling the door to the mechanism, whereby, upon opening and closing of the door, the control link operates the mechanism to translate the article support peg in opposing linear directions. The mechanism operative to move the article support peg linearly relative to the base can be a scissor mechanism having a proximal end extending toward the door and a distal end extending away from the door, wherein the distal end is attached to the base, and the proximal end is attached to a traveling bracket that carries the article support peg.

A supporting and positioning structure of server chassis including a metal plate combined with the chassis. A supporting body is combined at a lateral side of the mounting plate facing the server rack and includes a base and a pair of supporting plates. The base is fixed on the mounting plate, and the pair of supporting plates are arranged in parallel and at an interval so that a slot is formed therebetween. Moreover, a roller is rotatably disposed in the slot so that the chassis of the server rack can be supported and held.