Patent ID: 6523799
Filing Date: 2003-02-25
Classification: G03B

Abstract:
A stand adapted to support a predetermined device, the stand comprising:a screw rod; a supporting mechanism for supporting the predetermined device; an adjusting mechanism installed on the screw rod and connected to the supporting mechanism for adjusting a height of the supporting mechanism, the adjusting mechanism comprising a hole portion, the adjusting mechanism being installed on the screw rod through the hole portion, the hole portion comprising: an upper U-shaped wall positioned on a front-upper region of the hole portion, the upper U-shaped wall having a first screw thread; a lower U-shaped wall positioned on a back-lower region of the hole portion, the upper and lower U-shaped walls being opposite to each other and capable of separating from the screw rod, the lower U-shaped wall having a second screw thread; and a spring installed between the supporting mechanism and the adjusting mechanism for making the upper and lower U-shaped walls elastically contact the screw rod; wherein when the upper and lower U-shaped walls make contact with the screw rod, the adjusting mechanism is capable of moving up and down by rotating the screw rod, and when the upper and lower U-shaped walls separate from the screw rod, the adjusting mechanism is capable of sliding along the screw rod.