Abstract: An improved clamping device includes a clamping body, a clamp bolt, and a clamping plate. The clamping body has an open lower portion and a top plate at an upper portion. The top plate is formed with a top hole, a depression being formed at an outer periphery of the top hole and being provided with at least two depression holes. The clamping bolt has a clamping rod connected to a bolt plate. The bolt plate has an outwardly projecting bolt post. The clamping rod has an outer diameter smaller than an inner diameter of the top hole and is provided with threads. The bolt plate is sized to match the depression and provided with bolt holes corresponding to the depression holes. The clamping plate includes a bottom clamping portion, a top clamping portion, and a clamping wall, each of which is bent in a right-angle. The top clamping portion has a through hole sized to match the clamping rod and is provided with threads corresponding to those of the clamping rod. The clamping rod passes through the top hole.

Abstract: A keyboard support adjusting device includes a rotary frame, two frame plates, a connecting seat, and two brackets. A shaft connects the frame plates to the rotary frame. The connecting seat is pivotally connected at one end to the rotary frame. The other end of the connecting seat has a projecting extension seat with a through seat hole in a transverse direction and a curved groove. A tightening device passes through the frame plates, the brackets and the curved groove. The brackets are disposed on both sides of the extension seat, each of which includes a vertical portion provided with a through hole and a curved opening, and a horizontal portion defining a bracket face that may be connected to a keyboard support.

Abstract: An improved adjustable keyboard shelf includes a tray assembly and a palm rest assembly. The tray assembly includes a support plate having a top face provided with a planar portion adapted for placement of a computer keyboard. The support plate has a front side connected to a frame that is internally provided with a longitudinally oriented through frame groove. The palm rest assembly includes a support frame of a size larger than or equivalent to the length of the keyboard for resting of the user's palms. The support frame is provided with two clamping faces that bend downwardly and that correspond to both ends of the frame, respectively. The clamping faces each have an axial hole and a curved slot. The palm rest assembly further includes an adjusting device that has a frame rod passing through the curved slots and the frame groove therebetween. One end of the frame rod is secured on an outer side of one of the curved slots, with the other end lockably coupled with a knob.

Abstract: A knife holder has a hollow casing, a positioning plate disposed in the hollow casing, and a base plate disposed on a bottom of the hollow casing. The base plate has a periphery recess. The positioning plate has a center hole, an oblong aperture, and a plurality of slot apertures. An oblong hole is formed on a top portion of the hollow casing. A plurality of slot apertures are formed on the top portion of the hollow casing. A post extends downward from the top portion of the hollow casing. The post has a threaded end inserted in the center hole and fastened by a nut. The hollow casing has a periphery flange engaging with the periphery recess.

Abstract: A dimensional adjusting device for computer keyboard racks including a displacement device, a rotary device, a connecting plate, an elevating device, an elevation device, and a positioning device. The invention is characterized in that a relay plate is disposed between a fixed track and movable track of one of two slide track units, the relay plate being connected to the movable track and having two plate wings at both sides thereof. The plate wings pass through corresponding track holes in the movable track to be further connected to a plate flap at either side of a fixed plate. The invention is further characterized in that the fixed plate has a positioning device disposed therein. The positioning device is comprised of a bottom cover disposed over a front portion of the fixed plate, and two trigger pieces. The bottom cover has a partition rib defining a clearance with a front wall of the bottom cover for receiving two oppositely disposed rods with a spring sandwiched therebetween.

Abstract: A dimensional adjusting device for computer keyboard racks includes a displacement device, a rotary device, a connecting plate, an elevating device, an elevation device, and a positioning device. A relay plate is disposed between a fixed track and movable track of one of two slide track units, the relay plate being connected to the movable track and having two plate wings at both sides thereof. The plate wings pass through corresponding track holes in the movable track to be further connected to a plate flap at either side of a fixed plate. In addition is further characterized in that the fixed plate has a positioning device disposed therein. The positioning device includes of a bottom cover disposed over a front portion of the fixed plate, and two trigger pieces. The bottom cover has a partition rib defining a clearance with a front wall of the bottom cover for receiving two oppositely disposed rods with a spring sandwiched therebetween.

Abstract: An adjustable keyboard rack mounting structure which includes a sliding track unit having two parallel fixed rails coupled to two transverse track mount fixed to the bottom side of the desk top of a computer deck and a sliding plate moved back and force between the fixed rails, a retainer plate coupled to one track mount and adapted to releasably lock the sliding plate when the sliding plate is moved to a front limit position, a swivel frame pivoted to the sliding plate, a connecting plate pivoted to the swivel frame and releasably locked by an elevation control device, two brackets pivoted to the connecting plate at two opposite sides and releasably locked by an angle control device and adapted to hold a keyboard carrier and a keyboard on the keyboard carrier.

Abstract: A computer rack for placement on a desk surface including a top plate and two side plates. The top plate has a plate surface with a top side and a bottom side. At least one corner of the top side is sunken to form a plate ring with a central ring hole. The bottom side of the plate surface has criss-cross partition ribs. The two side plates face each other and are fixedly provided at both sides of the top plate. A plate post is disposed at a front end and a rear end of each side plate, each plate post having a curved hole at an upper end for matching the ring holes, and a post leg at a lower end for contacting the desk surface. Each side plate further has criss-cross plate ribs at an inner wall thereof. Support shafts of computer peripheral devices may be inserted into the ring holes and the curved holes for positioning purposes and for enhancing connection between the computer rack and computer peripheral devices.

Abstract: A keyboard slide structure which includes a keyboard slide having a top side provided with multiple holes at a front edge thereof, a palm rest removably locked to the holes of the keyboard slide by snap hooks thereof. A sliding mouse pad may be slidably connected to either the left or the right side of the keyboard slide by means of a slide rail means such that the mouse slide may be slid out or in under the keyboard slide in a retractable manner.

Abstract: A sliding track assembly including a track frame secured to a fixed member and defining two substantially C-shaped sliding grooves longitudinally disposed at two opposite sides and being each other, and a sliding frame fixedly secured to a movable member and having two outward flanges at two opposite sides respectively slidably coupled to the sliding grooves of the track frame, wherein two sliding wings are respectively fastened to the two outward flanges of the sliding frame and moved with the sliding frame in the sliding grooves of the track frame, each of the sliding wing having a longitudinal mounting groove at an inner side, which receives one outward flange of the sliding frame, an outward flange at an outer side, two horizontal springy ribs longitudinally disposed at two opposite sides of the outward flange of the respective sliding wing and defining a respective longitudinal slot, and two arched projections respectively and outwardly raised from the horizontal springy ribs and stopped at a vertical si