Lifting device for LCD
First Claim
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1. A parallelepiped lifting device mounted under an element in a storage position, comprising:
- an electric motor capable of rotating clockwise or counterclockwise;
two side adjusting screws;
a transverse bar interconnecting the adjusting screws, the transverse bar being moveable along the adjusting screws as they advance;
a ball-and-socket joint at about the center of the transverse bar;
an LCD coupled to the ball-and-socket joint, the LCD being covered in the storage position;
a post behind the LCD;
an upper dust cover pivotably coupled to the top of the post;
a lower L-shaped foot pivotably coupled to the bottom of the post;
a pair of first rollers at the bottoms of the adjusting screws;
a first belt fitted around the first rollers;
an idler roller on the adjusting screw;
a drive roller fixed at the bottom of the lifting device; and
a second belt fitted around the idler and drive rollers, wherein both the idler and drive rollers are disposed between the transverse bar and the first rollers, in a lifting operation of the LCD, the motor is started in the clockwise rotation for activating the drive roller in order to advance the second belt, the idler roller is then driven by the conveying second belt, the L-shaped foot is pivoted to lower the post, in response, the dust cover is pivoted upward about the post for exposing the LCD, one of the adjusting screws is driven by the idler roller to advance, the advance is in synchronism with that of the other adjusting screw, the advances are converted into an upward movement of the transverse bar for lifting the LCD from the lifting device until a predetermined maximum lifting distance is reached, and in a lowering operation of the LCD, the motor is started in the counterclockwise rotation for activating the drive roller in order to advance the second belt, the idler roller is then driven by the conveying second belt, the L-shaped foot is pivoted to raise the post, in response, the dust cover is pivoted downward about the post for closing the LCD, one of the adjusting screws is driven by the idler roller to advance, the advance is in synchronism with that of the other adjusting screw, the advances are converted into a downward movement of the transverse bar for lowering the LCD into the lifting device until a predetermined maximum lowering distance is reached.
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Abstract
A parallelepiped lifting device mounted under a computer desk in a storage position is disclosed. Prior to using a computer, the device is activated by starting a motor in a clockwise rotation to lift an LCD of the computer from under the desk by means of a mechanism comprising chain wheels, bars, and adjusting screws. A lowering of the device into the desk is performed by starting the motor in a counterclockwise rotation by means of the same mechanism. The invention can save desk space for other purposes in the storage position.
80 Citations
4 Claims
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1. A parallelepiped lifting device mounted under an element in a storage position, comprising:
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an electric motor capable of rotating clockwise or counterclockwise;
two side adjusting screws;
a transverse bar interconnecting the adjusting screws, the transverse bar being moveable along the adjusting screws as they advance;
a ball-and-socket joint at about the center of the transverse bar;
an LCD coupled to the ball-and-socket joint, the LCD being covered in the storage position;
a post behind the LCD;
an upper dust cover pivotably coupled to the top of the post;
a lower L-shaped foot pivotably coupled to the bottom of the post;
a pair of first rollers at the bottoms of the adjusting screws;
a first belt fitted around the first rollers;
an idler roller on the adjusting screw;
a drive roller fixed at the bottom of the lifting device; and
a second belt fitted around the idler and drive rollers, wherein both the idler and drive rollers are disposed between the transverse bar and the first rollers, in a lifting operation of the LCD, the motor is started in the clockwise rotation for activating the drive roller in order to advance the second belt, the idler roller is then driven by the conveying second belt, the L-shaped foot is pivoted to lower the post, in response, the dust cover is pivoted upward about the post for exposing the LCD, one of the adjusting screws is driven by the idler roller to advance, the advance is in synchronism with that of the other adjusting screw, the advances are converted into an upward movement of the transverse bar for lifting the LCD from the lifting device until a predetermined maximum lifting distance is reached, and in a lowering operation of the LCD, the motor is started in the counterclockwise rotation for activating the drive roller in order to advance the second belt, the idler roller is then driven by the conveying second belt, the L-shaped foot is pivoted to raise the post, in response, the dust cover is pivoted downward about the post for closing the LCD, one of the adjusting screws is driven by the idler roller to advance, the advance is in synchronism with that of the other adjusting screw, the advances are converted into a downward movement of the transverse bar for lowering the LCD into the lifting device until a predetermined maximum lowering distance is reached. - View Dependent Claims (2, 3, 4)
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Specification
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Current AssigneeChun-Chung Chang
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Original AssigneeChun-Chung Chang
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InventorsChang, Chun-Chung
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Primary Examiner(s)Cuomo, Peter M.
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Assistant Examiner(s)MCPARTLIN, SARAH BURNHAM
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Application NumberUS10/292,704Publication NumberTime in Patent Office545 DaysField of Search312/7.2, 312/319.5, 312/319.7, 312/223.3, 312/306, 312/312, 312/196US Class Current312/7.2CPC Class CodesA47B 21/0073 liftable above the desk topA47B 2220/0013 Table or cupboards with upw...A47B 81/061 the device supports being a...H04N 5/64 Constructional details of r...
