Multifunctional chair

Abstract

The present invention relates to a multifunctional chair which is configured to train, rehabilitate, and correct the back spine, pelvis and knee joints of the user. The angle of inclination of a seat member can be adjusted arbitrarily to the front, rear, left and right, thereby preventing back injury due to a sharp angle of inclination from the outset, while at the same time completely preventing rocking of the seat member when back exercises are not being carried out and thus allowing the chair to be used as a general chair. A rolling member provided in a lower part of the seat is improved, thereby imparting a cushioned feel to the seat while restricting the range of tilting movement of the seat to only front-and-back, left-and-right and multidirectional and preventing rotation in such a way as to limit excessive rocking of the seat overall and hence prevent side effects from seated exercises.

1 . A multifunctional chair which includes a support member having a moving means at its lower side; an ascending and descending member which is upwardly installed from the center of the support member and serves to adjust the height with the aid of an operation rod in the interior of a gas cylinder; a rolling member which is installed at the top of the ascending and descending member and is installed in a rolling possible way in a forward, backward, leftward or rightward direction, and a seat member which is installed at the top of the rolling member and allows a user to sit in safe, comprising:
 a fixing bracket which is installed at the top of an operation rod of the ascending and descending member and in which an arm rest is fixed at either side of it, a vertical rod with a certain height is installed at its central, upper side, and at the top of the vertical rod is installed a seat plate engaged and installed at the lower surface of the seat member and at the top of the fixing bracket;   a rolling adjusting means in which a cylindrical adjusting part is integrally ford at its peripheral portion with a certain interval from the vertical rod at the top of the fixing bracket, and a plurality of fixing shoulders are formed at inclined angles in multiple steps at the outer surface of the adjusting part, and a height adjusting part is installed at the outer surface of the fixing shoulder in such a way to slide-rotate together with it, and a stopper is formed at an inner surface of the height adjusting part and slides along a plurality of fixing shoulders, and as the lever of one side of the height adjusting part is tilted, its upper side comes into contact with a circular protrusion part provided beneath the seat plate or comes separated from it for thereby preventing the rolling of the seat member or adjusting the rolling angle of it; and   a rolling member in which a spring serving the rolling of the seat member is installed at an outer surface of the vertical rod between the fixing shoulder and the seat plate, and a spherical plane, which is kind of a bearing, is installed at a bearing hole of the seat plate, and the top of the vertical rod is engaged by an engaging bolt at the ball bearing.   
     
     
         2 . A multifunctional chair according to  claim 1 , wherein a spring is elastically installed between the fixing shoulder and the seat plate, and a lower end portion of the spring is engaged to a fixing groove formed at one side of the fixing shoulder, and an upper end portion of the spring is engaged to a fixing groove formed at one side of the fixing shoulder of the lower side of the seat plate, so the seat member of the upper side of the seat plate is always positioned in normal place. 
     
     
         3 . A multifunctional chair according to  claim 1 , wherein an operation space part into which the top of the operation rod of the ascending and descending member is inserted is formed at the lower side of the fixing bracket, and at one side of the operation space part is installed an operation lever as a two-stage operation hole is formed in a lateral direction, and one end of the operation lever inserted into the interior of the two-stage operation hole comes into contact with the gas absorber of the operation rod or comes separated from it for thereby controlling the ascending and descending operations of the ascending and descending member or obtaining a continuous ascending operation. 
     
     
         4 . A multifunctional chair according to  claim 1 , wherein a wrinkle tube made from a rubber material is installed between the upper side of the height adjusting part and the protrusion part of the lower side of the seat plate for improving the lowering operation of the height adjusting part. 
     
     
         5 . A multifunctional chair which includes a moving means  110  supporting from a lower surface for movements, an ascending and descending member  120  which is upright installed at the moving means  110  and serves to adjust the height of the sitting seat, a fixing bracket  130  which is installed at the top of the ascending and descending member  120  and has at its outer surface a height adjusting part  132  with a three-stage fixing shoulder  131  and integrally has at its central upper portion a vertical rod  133  with a connection hole  133   a , a seat plate  140  which has a connection boss part  141  having at its central portion an installation hole  141   a  guiding the vertical rod  133  provided at the center of the fixing bracket  130 , with the upper side of the seat plate  140  being connected with the lower side of the sitting seat, a rolling adjusting means  160  which passes through the rolling member  150  installed between the seat plate  140  and the fixing bracket  130  and integrally has a slope adjusting shoulder  162  at its inner diameter for being selectively engaged from the three-stage fixing shoulder  131  of the height adjusting part  132  for thereby adjusting in multiple steps the height of the seat plate  140  with respect to the rolling member  150 , and a spherical plane  320  and a spherical ball bearing  321  which are engaged at the engaging bolt  170  engaged to the vertical rod  133  of the fixing bracket  130  from the upper side of the seat plate  140  and at the end portion of the vertical rod  133  for thereby guiding the movements at the central portions of the seat plate  140 , comprising:
 hexagonal engaging grooves  140   a  and  130   a  which are provided correspondingly at the inner diameter of the height adjusting part  132  of the fixing bracket  130  corresponding to the connection boss part  141  of the seat plate  140  engaging the rolling member  150 , and said rolling member  150  is characterized in that a hexagonal engaging part  152  is formed at the upper and lower portions in a hollow shape to accommodate therein the vertical rod, and a spiral body  154  is formed between the hexagonal engaging part  152 , and a compression spring  156  is provided at the inner side of the body  154  for preventing the twisting of the rolling member  150  together with the cushion function of the sitting seat. 
 
     
     
         6 . A multifunctional chair according to  claim 5 , wherein said body  154  of the rolling member  150  is made from a rubber material of a urethane for thereby providing a rotation prevention function of a seat during a sitting type exercise.