Patent Publication Number: US-7211058-B1

Title: Electric-powered mechanical single-plank bed

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to an electric-powered mechanical single-plank bed or chair, and more particularly to an electric-powered mechanical single-plank bed or chair driven by a motor installed at a bed base to mechanically drive a cam to move downward, so as to produce a back-and-forth or sideway sway. 
   2. Description of the Related Art 
   Many designs of electric-powered beds provide a more comfortable effect when users lie down on the beds. With a high-tech ergonomic design, a large number of beds with advanced electronic designs are available in the market, and electric powered beds are no exception. There are floating beds designed according to the electromagnetic principle as shown in  FIGS. 1 ,  2 A and  2 B. In other words, a magnetic plate μl is installed under a bed plank A and a plurality of electromagnetic windings B 1  are installed at positions corresponding to the magnetic plate μl installed under the bed base B and the bed plank A, and the bed plank A is hanged to the hanging frame B 2  of the bed base by the suspensor C. When the electromagnetic windings B 1  start producing magnetic force, the magnetism produced by the magnetic force repels the magnetism of the magnetic plate μl under the bed plank A and thus produces a “floating” phenomenon. By then, an auxiliary pushing device D under the bed plank A pushes the bed plank A to move back and forth and thus the bed plank A keeps moving continuously. However, all these electromagnetic products have an arguable problem that their electromagnetic waves may or may not have adverse effects on human bodies. Since these products are driven by electromagnetic waves and the electromagnetic waves are proven to have adverse effect on human bodies, the quantity of energy directly causes brain waves and a change of organs. Although there are still arguments, nobody denies the such effects on human beings psychologically and physiologically, since the interference of these waves have already affected our body regarding the balance of electromagnetic field of the earth. Although we enjoy the convenience brought by these products, yet there exist intangible killers around us. 
   SUMMARY OF THE INVENTION 
   In view of the description above, the inventor of the present invention positively developed the present invention and filed a patent application for the invention. The objective of the present invention is to provide an electric-powered mechanical single plank bed or chair comprising a hanging frame disposed separately at a front left, a front right, a rear left and a rear right positions of a bed base, a suspending stand disposed under a single bed plank, such that a suspensor is installed between the hanging frame and the suspending stand for sustaining a heavy weight, and a plurality of motive power motors are installed in the bed base, and a cam is installed at a spindle of the motive power motor and engaged at a position under the bed plank corresponding to the driving frame for limiting its position, so that when a controller turns on the motive power motor to drive the cam to operate, the bed plank is pushed to move back and forth by the cam to produce a back-and-forth or sideway sway. 
   Another objective of the present invention is to provide an electric-powered mechanical single plank bed or chair, wherein the hanging frame and the suspending stand are provided for hanging the suspensor and the bed plank coupled with the bed plank includes a conical fixing member, and a rod stand of the hanging frame of the bed base includes a conical hole, such that a conical fixing member of the bed plank is installed into the conical hole of the rod stand on the hanging frame, and a turning angle of 360 degrees on a conical surface achieves a free movement without any restricted angle. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of a traditional structure; 
       FIG. 2A  is a schematic view of preparing the movement of a traditional structure; 
       FIG. 2B  is a schematic view of starting the movement of a traditional structure; 
       FIG. 3A  is a perspective view of a structure of the invention; 
       FIG. 3B  is an enlarged view of a portion of a structure of the invention; 
       FIG. 4A  is another enlarged view of a portion of a structure of the invention; 
       FIG. 4B  is a further enlarged view of a portion of a structure of the invention 
       FIG. 5  is a schematic view of back and forth movements of the invention; 
       FIG. 6  is a schematic view of sideway movements of the invention; and 
       FIG. 7  is a schematic view of applying the present invention to a chair. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Referring to  FIGS. 3A ,  3 B,  4 A and  4 B, an electric-powered mechanical single-plank bed or chair comprises a vertical hanging frame  11  installed at the four corner positions of a single bed plank  2  at a bed base  1 , a suspending stand  21  installed at the bottom of the bed plank  2 , and a suspensor  3  hung between the hanging frame  11  and the suspending stand  21  for sustaining a heavy weight. The bed plank  2  includes a conical fixing member  22 . A rod stand  12  of the hanging frame  11  of the bed base  1  includes a conical hole  121 , such that each conical fixing member  22  in the bed plank  2  is installed into the conical hole  121  of a rod stand  12  on the hanging frame  11  of the bed base  1  (as shown in  FIGS. 4A and 4B ). With the design of a turning angle of 360 degrees on the conical surface, a free movement without any restricted angle can be achieved. The bed base  1  includes a plurality of motive power motors  13 , so that the spindle of each motive power motor  13  moves a cam  14  engaged at a position under the bed plank  2  at a position corresponding to the driving frame  23  for limiting its position (as shown in  FIGS. 5 and 6 ). 
   If a controller turns on the motive power motor  13  to drive the cam  14  to operate, the driving frame  23  under the bed plank  2  is pushed by the cam  14  to move back and forth, so that the bed plank  2  moves back and forth accordingly (as shown in  FIG. 5 ). Now, the conical fixing member  22  in the bed plank  2  also can move freely in 360 degrees with respect to the conical surface in the conical hole  121  of the rod stand  12  on the hanging frame  11  of the bed base  1 , so as to achieve the sway without a restricted angle. Similarly, a driving frame  23  at another direction under the bed plank  2  is pushed by a cam  14  at a corresponding direction, and thus the bed plank  2  moves sideways (as shown in  FIG. 6 ). In the meantime, the conical fixing member  22  in the bed plank  2  also can rotate freely with a turning angle of 360 degrees with respect to the conical surface of the conical hole  121  of the rod stand  12  on the hanging frame  11  of the bed base  1 , so as to achieve the sway without a restricted angle. If a user lies down in a bed, the user can move and relax their body and skin, and thus preventing bedsores caused by the hot, windless, moist climate when the user&#39;s body or skin is in touch with the bed plank for a long time. In the meantime, the user&#39;s body and organs obtain a timely moving effect when the user&#39;s body is swayed, so as to maintain the normal functions of each organ. 
   Further, the structure of the invention can be applied for the operation of chairs (as shown in  FIG. 7 ), and a vertical hanging frame  11  and suspending stand  21  are installed at a chair base  1 ′ and a chair plank  2 ′ respectively, and a suspensor  3  is hung between the hanging frame  11  and the suspending stand  21  for sustaining a heavy weight. The chair plank  2 ′ includes a conical fixing member  22  therein, and the chair base  1 ′ includes a conical hole  121  at the rod stand  12  of the hanging frame  11 , such that each conical fixing member  22  in the chair plank  2 ′ is installed in the conical hole  121  of the rod stand  12  on the hanging frame  11  of the chair base  1 ′ as shown in  FIG. 3B . With the design of a turning angle of 360 degrees with respect to a conical surface, a free movement without a restricted angle can be achieved. Further, the chair base  1 ′ includes a plurality of motive power motors  13  therein, so that a spindle of the motive power motor  13  installs a cam  14  engaged at a position under the chair plank and disposed at a position corresponding to the driving frame  23  for limiting its position, so as to achieve the foregoing back-and-forth and sideway swaying effect. 
   Of course, the movements of the cam in accordance with the invention can be achieved by different mechanical methods including gear discs or chains to produce the equivalent effects of the invention, and thus overcoming the problem that comes with the electromagnetic design. 
   In summation of the above description, the present invention herein enhances the performance than the conventional structure and further complies with the patent application requirements and is submitted to the Patent and Trademark Office for review and granting of the commensurate patent rights.