Patent Application
20070034125
1. Field of the Invention
The present invention relates to an improved hidden electric power elevating stand structure, and more particularly to an easy-to-install, easy-to-operate, power saving and stable elevating stand structure that can be hidden in a ceiling.
2. Description of the Related Art
In general, the traditional stand for placing a videoconferencing or audio/video equipment such as an overhead projector, a speaker and an optical disk drive is not adjustable regardless of being fixed at a certain height or suspended from a ceiling. Furthermore, objects like an overhead projector usually require an adjustment of their heights according to the actual situations, and thus manufacturers design an elevating stand that can be controlled by a remote control. An example is depicted in
1. It is not easy to install the elevating stand. Fixing plates are secured onto the four corners of a top panel first, and then a wall anchor passes through a fixing hole of the fixing plate to fix the fixing plate onto the ceiling. Since the ceiling is often not level, and the overall structure is quite heavy (over 25 kg), therefore it requires at least three construction workers to adjust the stand. Furthermore, it is unable to fully adjust the horizontal attachment with the ceiling, which may be dangerous to the construction worker to carry out such aerial operation.
2. It is difficult to maintain or repair the elevating stand, since the control circuit and receiver of the remote control are installed inside the elevating stand. If the circuit breaks down and the circuit is in a close circuit, then the maintenance person cannot remove the circuit by itself, but have to remove the whole set for maintenance.
3. The motor consumes much electric power. The screw rod pushes the driving rod at the upper deck to have a linear horizontal movement, and the pushing force is consistent that will diversify the upward pushing force of the frame, which will affect the efficiency of the pushing force of the motor.
It is a primary objective of the present invention to provide an improved hidden electric power elevating stand structure, so that the elevating stand can have an easier installation, a smoother transmission, and an adjustable angle of elevation.
The foregoing elevating stand structure comprises upper and lower frame bodies, upper and lower braking rod crossed with each other and installed longitudinally on the lateral sides of the upper and lower frame bodies; wherein a transversal rod is disposed at the intersection of the bottom of the lower braking rod and the upper braking rod for connecting an electric power screw rod, such that the transversal rod of the lower braking rod is sheathed into a track disposed between two longitudinal sides of the lower frame body, and the extension or withdrawal of the screw rod drive the frame body to ascend or descend respectively. Since the screw rod is moved according to the braking rod to have a consistent pushing force, such arrangement can achieve the long arm moment and power saving effects.
The foregoing elevating stand structure includes dual bearings installed between both ends of the transversal rod at the bottom of the lower braking rod, so that the bearing is situated in the track of the lower frame body to make the braking rods to slide freely and smoothly, so as to prevent the braking rods from being shifted.
The foregoing elevating stand structure includes symmetric microswitches disposed on the internal sides of the track of the lower frame and with an appropriate distance from each other to define a two-way limit positioning.
The foregoing elevating stand structure installs a fixing stand, and the fixing stand has a long hole. The fixing stand is installed onto the ceiling, and then the elevating stand is installed onto the fixing stand. Such arrangement facilitates its installation and maintenance, and the long hole constitutes the adjustment of the angle of elevation.
The foregoing elevating stand structure installs a plurality of sockets and electric connectors at the lower frame body for connecting an external power supply or a control device in a hidden manner, so as to beautify the overall external look.
FIGS. 5 to 6 are schematic views of the movements of an elevating stand of the present invention.
Referring to
The transversal rod 41 disposed at the bottom of the lower braking rod 4 is fixed to an electric screw rod 51 by a U-shape fixing plate 5, so that the front end of the screw rod 51 is connected to a transversal rod 33 disposed at the intersection of the upper braking rod 3. When the screw rod 51 is extended or withdrawn, the upper and lower braking rods 3, 4 are driven to be stacked inwardly or spread out to drive the lower frame body 2 to move vertically up and down.
One of the tracks 21 at the internal side of the lower frame installs two microswitches disposed at an appropriate distance with each other, so that the bottom of the lower braking rod 4 presses against the two microswitches during its sliding to constitute the function of limiting the position of the braking rod 4.
The upper frame body 1 has a plurality of through holes 12 for installing various different sockets 81 or electric connectors 82 and connecting an external power supply or a control device.
A support plate 102 is fixed at an appropriate distance at the bottom side of the lower frame body 2 by a plurality screws at the four corners of a fixing rod 101.
With the foregoing components, the upper and lower frame bodies 1, 2 are covered by a meshed contractible hood 7 to define an elevating stand 100, and the support plate 102 is provided for placing an object such as an overheat projector or a television. The screw rod 51 is an extendible component controlled by a remote control or other electric control, so that the upper and lower braking rods 3, 4 can be stacked or spread out to define the vertical movements of the elevating stand 100, so as to achieve the purposes of hiding the object such as the overhead projector or television as well as adjusting their heights.
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In summation of the above description, the present invention herein complies with the patent application requirements and is submitted for patent application. However, the description and its accompanied drawings are used for describing preferred embodiments of the present invention, and it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
