LIQUID CRYSTAL DISPLAY AND HEIGHT
ADJUSTABLE BASE OF THE PANEL
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a liquid crystal display and particularly to liquid crystal display with a height adjustable base for the panel thereof capable of releasing or restoring an elastic ascending force needed by the lifted operation with an elastic locating device provided for the liquid crystal display.
2. Brief Description of the Related Art
Due to information technology being developed progressively, the monitor with screen display is widely applied for showing pictures such as graphical images. The traditional cathode ray tub (CRT), which has been popularly used for a long time, has been largely replaced with the liquid crystal display (LCD), which is light in weight and thin in thickness.
When the liquid crystal display is placed on the desktop for the liquid crystal panel thereof being adjusted to lift a height or to incline an angular position based on the preference of the user, an adjustment device is arranged to meet the need of the user's comfort.
The conventional liquid crystal display provides a height adjustable base for adjusting the liquid crystal panel and a locating spring is arranged to supply an elastic ascending force to lift the liquid crystal panel. However, the height adjustable base is operated to locate the liquid crystal panel by means of balancing the gravity of the liquid crystal display and the elastic ascending force of the locating spring such that the liquid crystal panel can only be operated to ascend or descend at the time of the liquid crystal display being used at a normal condition. When the liquid crystal display is packed for delivery, the liquid crystal panel is disposed at the lowest position as possible under a condition of the torsion of the locating spring being released. In this way, the liquid crystal panel is easy to bounce out suddenly to hurt people at the time of the liquid crystal display is unpacked.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a liquid crystal display with a height adjustable base for a liquid crystal panel thereof which provides an elastic locating device to release or restore an elastic ascending force needed by the operation of lifting the liquid crystal panel such that it is capable of preventing the liquid crystal panel from bouncing out suddenly at the time of unpacking and it is easy for restoring the lifted operation automatically.
In order to achieve the preceding object, a liquid crystal display according to the present invention includes a liquid crystal display and a height adjustable base and the height adjustable base further includes a main base, a fixing frame and an elastic locating device.
Wherein, the main base provides at least a sliding rail, which has a stationary member attached to the main base and a movable member capable of sliding along the stationary member; the fixing frame is connected to the movable member for being mounted with the liquid crystal panel; and the elastic locating device provides an acting end, which is disposed against the fixing frame for supplying an elastic ascending force to the fixing frame, and a joining end, which is detachably connected to the main base with an elastic coupling force for restoring the elastic ascending force automatically.
In a preferred embodiment of the present invention, the fixing frame further comprises a frame member fastened to the movable member with a stop-rotation shaft hole; a spring locating seat attached the lower side of the frame member for
5 being joined to the acting end of the elastic locating device; a shaft passing through the stop-rotation shaft hole to connect with said frame member; a brake device disposed next to said frame member; and a fixing plate member being braked with the brake device and rotationally connected to the shaft such
10 that the fixing frame is capable of rotating with respect to the main base to adjust the angular displacement of the liquid crystal panel relative to the main base in addition to the liquid crystal panel moving upward or downward with respect to the main base.
15 In the preferred embodiment of the present invention, the main base has an engaging hole and the elastic locating device further comprises a spring force releasing base with a central through hole and two threaded holes; a locating sheet spring having a middle hole and two side holes at the acting end for
20 supplying the elastic ascending force; a sliding pin base providing a locating pin and two base holes; two coil springs for supplying the elastic coupling force; and two screws passing through the two coil springs, the two base holes, the two threaded holes and the side holes for engaging with the two
25 threaded holes respectively.
In the preferred embodiment of the present invention, when the liquid crystal display is in a state of normal use, the locating pin is capable of passing through the middle hole of the locating sheet spring, the central through hole of the
30 spring force releasing base and the engaging hole of the main base to connect with the main base. At this time, if the liquid crystal panel is operated to ascend or descend, in addition to the fixing frame moving along the stationary member with the movable member, the locating pin, which is disposed at the
35 joining end of the elastic locating device, is incapable of moving because of being joined to the engaging hole; but the acting end of the locating sheet spring of the elastic locating device is capable of moving along with the movable member due to being disposed against the spring locating seat such
40 that the elastic ascending force can be provided to balance the gravity of the liquid crystal panel for the liquid crystal panel being able to be operated to move upward or downward normally.
In the preferred embodiment of the present invention, when
45 the liquid crystal display is packed, the locating pin of the elastic locating device can be disengaged from the engaging hole of the main base with a tool to achieve the purpose of disengagement. Meanwhile, if fixing frame is operated to ascend or descend the liquid crystal panel, the entire elastic
50 locating device is capable of moving with the frame member to release the elastic ascending force of the locating sheet spring such that the liquid crystal panel is incapable of bouncing out accidentally to hurt people at the time of the liquid crystal device being unpacked.
55 In the preferred embodiment of the present invention, when the liquid crystal display is unpacked, the liquid crystal panel can be pushed to move upward to the top end for the locating pin of the locating elastic locating device aligning with the engaging hole of the main base such that the elastic forces of
60 the two coil springs of the elastic locating device push the locating pin into the engaging hole to engage with the main base and restore the function of lifting automatically.