Pelvis Protecting Chair

Abstract

This invention relates to a pelvis protecting chair composed with elastic seats. This invention is composed of a base ( 10 ) mounted on a stationary part ( 60 ) with a castor ( 66 ) mounted stand ( 65 ), at least one set of seat supports ( 20 ) hinged to the base, a spring ( 30 ) elastically connecting the base ( 10 ) and the seat support ( 20 ), seats ( 50 ) mounted to the seat supports ( 20 ), and armrests ( 75 ) and a backboard ( 70 ) mounted to the base ( 10 ).

1 . A pelvis protecting chair comprising:
 a base having at least one set of base hinges symmetrically located on both sides of the top of a base plate, and mounted on a stationary part at a predetermined height;   at least one set of seat supports with hinges mounted under side thereof and hinged to the base hinge;   a spring installed at a connecting point of the seat support hinge for elastically sustaining the seat support; and   at least one set of seats corresponding to the seat support;   
   
   
       2 . The pelvis protecting chair according to  claim 1 , wherein the seat support hinge of the seat support has a stopper which is in contact with a side of the base for sustaining the seat support in a certain angle. 
   
   
       3 . The pelvis protecting chair according to  claim 1 , wherein the spring is a leaf spring, one side of which is connected to the upper side of the base, and the other side of which is connected to the lower side of the seat support. 
   
   
       4 . The pelvis protecting chair according to  claim 3 , wherein the end portion of the base side of the leaf spring is curved in an upward direction. 
   
   
       5 . The pelvis protecting chair according to  claim 3 , wherein the end portion of the seat support side of the leaf spring is fixed at the seat support. 
   
   
       6 . The pelvis protecting chair according to  claim 1 , further comprising a set of armrests connected to the both sides of the lower part of the base or the stationary part. 
   
   
       7 . The pelvis protecting chair according to  claim 1 , further comprising a backboard connected to rear side of the lower part of the base or the stationary part. 
   
   
       8 . The pelvis protecting chair according to  claim 1 , wherein the stationary part has a height controlling section and a movement allowing caster. 
   
   
       9 . The pelvis protecting chair according to  claim 1 , further comprising a connecting section at the base for connecting the stationary part, and which is positioned lower than the base plate. 
   
   
       10 . The pelvis protecting chair according to  claim 1 , wherein the base hinges and seat supports are 3 sets, respectively.