Elevation adjusting mechanism and display device using the same

Abstract

An elevation adjusting mechanism used for ascending or descending a monitor includes a base, a first thread bushing, a second thread bushing, a guiding bushing and a second gear. The first thread bushing including a first gear is movably connected to the base. The second thread busing is connected to the first thread busing. One end of the first thread bushing is contained in the second thread bushing. The monitor is disposed on the second thread busing. The guiding bushing is fixed at the base and covers the second thread bushing, so that the second thread bushing only moves along an elevating direction. The second gear is movably connected to the guiding busing and meshes with the first gear. When the second gear is rotated and drives the first thread bushing to rotate, the second thread busing moves along the elevating direction to ascend or descend the monitor.

1 . An elevation adjusting mechanism for ascending or descend a monitor, comprising:
 a base;   a first thread bushing movably connected to the base and comprising a first gear;   a second thread bushing connected to the first thread bushing, wherein one end of the first thread bushing is contained in the second thread bushing, and the monitor is disposed on the second thread bushing;   a guiding bushing fixed at the base and covering the second thread bushing, so that the second thread bushing only moves along an elevating direction; and   a second gear movably connected to the guiding bushing and meshing with the first gear, wherein when the second gear is rotated and drives the first thread bushing to rotate, the second thread bushing moves along the elevating direction to ascend or descent the monitor.   
   
   
       2 . The elevation adjusting mechanism according to  claim 1 , wherein the base comprises:
 a weight portion disposed at a side of the base for counterbalancing the weight of the monitor; and   a containing portion disposed relatively to and coupled to the weight portion, wherein the containing portion has a recess and the first thread bushing rotates within the recess.   
   
   
       3 . The elevation adjusting mechanism according to  claim 1 , further comprising:
 a buffer spring surrounding a buffer positioning shaft of the first thread bushing for supporting the monitor.   
   
   
       4 . The elevation adjusting mechanism according to  claim 3 , wherein the buffer spring is substantially compressed. 
   
   
       5 . The elevation adjusting mechanism according to  claim 1 , wherein the guiding bushing has at least one guiding rib disposed on an inner wall of the guiding bushing, and the second thread bushing has at least one guiding groove positioned on an outer wall of the second thread bushing for cooperating with the guiding rib, so that the second thread bushing only moves along the elevating direction. 
   
   
       6 . The elevation adjusting mechanism according to  claim 5 , wherein one end of the guiding groove has a side wall for preventing the second thread bushing from separating from the guiding bushing when elevating. 
   
   
       7 . The elevation adjusting mechanism according to  claim 5 , wherein the guiding bushing has a plurality of guiding ribs, the second thread bushing has a plurality of guiding grooves, and the number of the guiding grooves corresponds to the number of the guiding ribs. 
   
   
       8 . The elevation adjusting mechanism according to  claim 1 , wherein the guiding bushing is composed of two cases, the cases have at least one hook and at least one groove respectively, the hook is disposed with respect to the groove, and the hook is used for inserting into the groove so as to combine the cases. 
   
   
       9 . The elevation adjusting mechanism according to  claim 1 , further comprising a handle, wherein the handle disposed on the same axis with the second gear is used for driving the second gear to rotate. 
   
   
       10 . The elevation adjusting mechanism according to  claim 9 , wherein the guiding bushing has a handle receiver positioned at an outer wall of the guiding bushing, wherein the guiding bushing is used for containing the handle. 
   
   
       11 . The elevation adjusting mechanism according to  claim 1 , further comprising:
 a rotation mechanism disposed on the second thread bushing and coupled to a back side of the monitor, wherein the rotation mechanism is used for adjusting an inclination angle of the monitor.   
   
   
       12 . The elevation adjusting mechanism according to  claim 1 , wherein the first thread bushing has an external thread surface, the second thread bushing has an internal thread surface, and the external thread surface is connected to the internal thread surface. 
   
   
       13 . A display device, comprising:
 a monitor; and   an elevation adjusting mechanism for ascending or descending the monitor, the elevation adjusting mechanism as claimed in  claim 1 .