Keyboard tray

Abstract

A keyboard tray is disclosed, including: a fixing frame, including a fixing frame body; a movable frame, including a movable frame body, and a sliding mechanism, where the movable frame body is slidable through the sliding mechanism; an angle adjusting mechanism, including a limiting plate, a supporting rod, and a positioning pin, where the limiting plate is connected to the movable frame body, the supporting rod is hinged to the limiting plate, a plurality of first limiting holes are provided in the limiting plate, a second limiting hole is provided in the supporting rod, and the positioning pin is allowed to pass through the first limiting hole and the second limiting hole to achieve locking; a pull rope with both ends being respectively hooked to ends of two positioning pins; and a supporting plate mounted on the supporting rod and configured to support a keyboard.

What is claimed is: 
     
         1 . A keyboard tray, comprising:
 a fixing frame, wherein the fixing frame comprises a fixing frame body, and the fixing frame body is fixed to a bottom of a desktop;   a movable frame, wherein the movable frame comprises a movable frame body and a sliding mechanism, a sliding rail in the sliding mechanism is mounted on the fixing frame body, and a sliding block in the sliding mechanism is connected to the movable frame body;   two angle adjusting mechanisms, wherein each of the angle adjusting mechanisms comprises a limiting plate, a supporting rod, and a positioning pin, the limiting plate is connected to the movable frame body, the supporting rod is hinged to the limiting plate, a plurality of first limiting holes are provided in the limiting plate, distances between each of the first limiting holes and a hinge shaft of the supporting rod are equal, a second limiting hole is correspondingly provided in the supporting rod, and the positioning pin is allowed to pass through the first limiting hole and the second limiting hole to achieve locking;   a pull rope, wherein both ends of the pull rope are respectively hooked to ends of two positioning pins, and the two positioning pins are allowed to be simultaneously driven to withdraw from the first limiting hole or the second limiting hole when a middle portion of the pull rope is pulled by a user; and   a supporting plate, wherein the supporting plate is mounted on the supporting rod and is used to support a keyboard.   
     
     
         2 . The keyboard tray according to  claim 1 , further comprising a height adjusting mechanism, wherein the height adjusting mechanism comprises connecting rod assemblies, a limiting member, and limiting racks, and wherein the limiting racks are fixed to the movable frame body, the connecting rod assemblies are parallelogram connecting rod sets, one end of the limiting member is hinged to the connecting rod assemblies, and the other end of the limiting member is allowed to abut against the limiting racks. 
     
     
         3 . The keyboard tray according to  claim 2 , wherein there are two connecting rod assemblies and two the limiting racks, which are both symmetrically arranged, the limiting member is frame-shaped and hinged to the two connecting rod assemblies, and the limiting member is allowed to simultaneously abut against the two limiting racks. 
     
     
         4 . The keyboard tray according to  claim 3 , wherein a holding rod extends outwards from the limiting member to facilitate holding by a user. 
     
     
         5 . The keyboard tray according to  claim 1 , wherein the fixing frame further comprises at least two clamping mechanisms, which are all connected to the fixing frame body, and the fixing frame body is fixed to the bottom of the desktop through the clamping mechanisms. 
     
     
         6 . The keyboard tray according to  claim 5 , wherein each of the clamping mechanisms comprises a clamping frame, a pushing screw rod, and a pad, the clamping frame has a “C” shape and is clamped with a desktop edge, the clamping frame is provided with a threaded hole for threaded connection with the pushing screw rod, the pad is mounted on a first end of the pushing screw rod, and the pad is allowed to be driven close to the desktop and to clamp and fix the desktop together with the clamping frame by screwing the pushing screw rod. 
     
     
         7 . The keyboard tray according to  claim 6 , wherein the clamping mechanism further comprises a screwing handle, and the screwing handle is fixed to a second end of the pushing screw rod to facilitate holding by a user. 
     
     
         8 . The keyboard tray according to  claim 1 , wherein each of the angle adjusting mechanisms further comprises a reset member, both ends of the reset member are respectively connected to the positioning pin and the limiting plate, and the reset member is configured to drive the positioning pin to pass through the first limiting hole and the second limiting hole. 
     
     
         9 . The keyboard tray according to  claim 1 , wherein: a barrier strip is mounted on the supporting plate, and the barrier strip protrudes outwards to prevent the keyboard from sliding off the supporting plate. 
     
     
         10 . The keyboard tray according to  claim 9 , wherein the barrier strip is an elastic piece.