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You are an expert at summarizing long articles. Proceed to summarize the following text: 
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a lifted upright post device with multidirectional joints, and, particularly to a lifted upright post device, in which at least a lifted device is provided so as to lift or descend a spacing board connected to the lifted device. 
     2. Description of Related Art 
     Due to fast development of the industrial and the commercial businesses and the population aggregating in the city, we have confronted an extreme challenge with regard to a limited living space and office space. Besides, increasing frequencies of moving and temporary space needs make the traditional stationary partition or screen system unavailable for meeting the necessity. Thus, the so-called flexible partition or screen system arises at the right time. 
     Because the partition system or the screen system is lack of openness and mobility, it is getting declining along with the change of job style and a screen system emphasizing opening space is used instead. Although the screen system available in the market provides sight obstacle less environment and an office can be partitioned as several semi-opening rooms as long as several worktables are assorted with the conventional screen system, the deficiency of the conventional screen system is it is unmoved so that it is incapable of being adjustably lifted as the actual need. Besides, the upright post in the screen system mostly can be continuously extended transversely, but L shaped, T shaped or cross-shaped switch upright posts have to be prepared for making turns. In order to meet the necessity of corner turns, the fabrication and the inventory for more upright posts are required such that the expenditure of additional molding tools has to be increased largely and the structure of the product becomes more complicated. 
     In order to improve the conventional screen system, the present inventor has filed U.S. patent application Ser. No. 09/838,302 now U.S. Pat. No. 6,612,670 entitled LIFTED SCREEN and U.S. patent application Ser. No. 10/002,228 now U.S. Pat. No. 6,634,824 entitled CONNECTING DEVICE FOR A SCREEN SYSTEM. The present inventor has aimed at the preceding deficiency and develops the invention. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to provide a lifted upright post device with multidirectional joints, in which the upright post can be joined vertically or transversely optionally and at least a lifted device is arranged in each of the upright posts in a screen system so that it is possible to be lifted or descended along the desired direction with spacing boards therein moving synchronously. 
     In order to reach the preceding object, the lifted upright post device with multidirectional joints according to the present invention includes at least one upright post and a lifted device. The upright post is elongated with a homogeneous cross section, having longitudinal engaging slide grooves disposed at a circumferential periphery thereof and each of the slide grooves has an outer opening to communicate with the outside. The lifted device is selectively disposed in the slide grooves with a slide part being connected to a spacing board. Once the lifted device is actuated, the slide part can move upward or downward in the slide grooves longitudinally so as to move the spacing board synchronously. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The present invention can be more fully understood by reference to the following description and accompanying drawings, in which: 
     FIG. 1 is an exploded perspective view of an upright post and a lifted device according to the present invention; 
     FIG. 2 is an exploded perspective view of relay stuffs, spacing board and the lifted device according to the present invention; 
     FIG. 3 is a perspective view of a modularized table unit composed of lifted upright posts of the present invention; 
     FIG. 4 is a plan view illustrating a table board with a lower joint piece for engaging with a relay stuff in the present invention; and 
     FIG. 5 is a perspective view illustrating an office furniture system set up by way of the lifted upright posts of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to FIGS. 1 and 2, a lift upright post device with multidirectional joints according to the present invention comprises an upright post  1 , a lifted device  6  and a spacing board  7 . 
     Wherein, the upright post  1  is elongated with homogeneous cross section and the periphery thereof has a plurality of engaging slide grooves  11  with an outer opening  111  along each of the slide grooves  11 . In fact, the upright post  1  basically is the same as that disclosed in U.S. patent application Ser. No. 10/002,228 filed by the present inventor so that it is mentioned here as a reference. That is, each of the engaging slide grooves  11  at two inner lateral sides thereof has a side groove  112  respectively so as to be inserted with and locate two side juts  23  of an insert bar  2  such that a front arctic projection  21  thereof can be located at the outer opening  111  with a line of equidistantly longitudinally disposed hanging holes  22 . 
     Besides, the upright post  1  at the upper and the lower ends thereof has two opposite lock pins  3  inserted in two of the engaging slide grooves  11  and a relay piece  5  is connected to each of the lock pins  3  and the corresponding lock pin  3  in a neighboring upright post  1  to form a frame. Thus, a panel board can be held by the relay pieces  5  (not shown) to form a screen. 
     Further, the upright post  1  at the center thereof is provided with an axial through hole  12  for being passed by wires and the upper and the lower ends thereof are attached with a top end piece  13  and a bottom end piece  14  to block the openings thereon. An adjustable leg  15  is connected to the bottom of the upright post  1  so that the upright post  1  can be adjusted the elevation thereof. 
     The lifted device  6  is a sleeve type extension device such as an air cylinder  40  or a hydraulic cylinder  42  or a cylinder associated with a sleeve  46  a spring  44  and a lever. As shown in FIGS. 1 and 2, the lifted device  6  is a cylindrical pipe (slide part) fitting with a lever (stationary part)  62 , which is received in one of the engaging slide grooves  11  between another two of the engaging slide grooves  11  attached with the lock pins  3 . The lever  62  at the lower end thereof is a fixing end  621 , which passes through the bottom end piece  14  and is fastened with a nut  622  to form a stationary part. The cylindrical pipe  61  at the upper and the lower ends thereof has a pivot  611  joined to the spacing board  7  such that it is possible that the spacing board  7  can be lifted or descended with cylindrical pipe  61  along the engaging slide groove  11 . 
     The spacing board  7  is disposed and taken in a frame enclosed by two upright posts. In practice, the spacing board  7  can be a writing board such as an electronic whiteboard, a display panel or an illumination panel so that characters or pictures can be shown on the board or an effect of illumination can be performed. Besides, the spacing board  7  can be applied to a counter in a bank or a commercialized counter or used for a dressing table in a beauty salon as a lifted mirror. 
     In order to protect the upper and the lower sides of the spacing board  7 , a T shaped edge sealing plate  71  can be used as a side cover respectively. The upper side thereof is provided with a lock  72  and the lock  72  extends laterally a key plug  721  to engage with a preset engaging hole  31  in the respective engaging pin  3  such that the spacing board  7  can be fastened firmly and it becomes unable to be lifted. Once the lock  72  is unlocked, the cylindrical pipe  61  is free from being caught and moves upward along the engaging slide groove  11  to allow the spacing board  7  lifting synchronously so as to attain an expected effect. Further, an upper cover  73  can be connected to the upper side of the spacing board  7  for a purpose of beautification. 
     Referring to FIGS. 1 to  4  again, in order to form a table, two brackets  24  with tenons thereof are engaged to corresponding hanging holes  22  in the two insert bars  2  such that the table board  25  can be placed on the two spaced apart brackets  24  to constitute a firmer connection with the relay piece  5  with a forked upper joining piece  26  at an end thereof having hooks  261  to engage with the relay piece  5 . Further, the upper joining piece  26  at a lateral side thereof extends a stretch plate  262  to be inserted into the relay piece  5  and a screw passes through the upper joining piece  26  so as to be fastened to the table board  25  so that the table board  25  can be effectively supported in place horizontally. As soon as the table is set up, the configuration thereof is as shown in FIG.  5 . Besides, in order to set up an open type office system furniture as shown in FIG. 5, a plurality of upright posts  1  and table boards  25  can be used to be associated with each other. Moreover, once the spacing board  7  is lifted, a screen system can be formed. Further, a conference room or private space can be formed without any sight obstacle based on the actual need as desired. 
     It is appreciated that the advantages of the present invention are listed hereinafter: 
     1) The lifted upright post device with multidirectional joints of the present invention can be assembled fast and located accurately. Due to all parts thereof having been designed with modularization and the parts being fixed by way of insertion, the upright post device is possible to be set up fast and flexibly to reach the best effect during the assembly job being performed. 
     2) The lifted upright post device with multidirectional joints of the present invention provides a function of multiple direction stretching. The upright post is specially designed so that it is possible to have a function of performing multiple direction extensions easily under a condition of not switching the upright post. 
     3) The upright post device with multidirectional joints of the present invention has a function of extending the spacing board thereof so that the spacing board can be selectively lifted to form a screen system or an open space so as to offer a communication environment for human relationship. 
     4) The upright post device with multidirectional joints of the present invention can be detached or assembled easily. The purpose for lifting and descending the spacing board can be reached even if the parts thereof are simply fabricated. Further, the parts can be reused over and over again after being detached so that the pursuit of environmental protection can be actually achieved. 
     While the invention has been described with reference to a preferred embodiment thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined in the appended claims.

Summary:
A lifted upright post device with multidirectional joints includes at least one upright post and a lifted device. The upright post is elongated with a homogeneous cross section, having longitudinal engaging slide grooves disposed at a circumferential periphery thereof and each of the slide grooves has an outer opening to communicate with the outside. The lifted device is selectively disposed in the slide grooves with a slide part being connected to a spacing board. Once the lifted device is actuated, the slide part can move upward or downward in the slide grooves longitudinally so as to move the spacing board synchronously.