Chair

Abstract

To provide a chair such that, when a person sits thereon, a force in the direction that widens the pelvis to the left and right does not act on the pelvis, and a function of sandwiching the pelvis from both the left and right sides is exerted naturally once a person sits on the chair, left and right pad members ( 20 ) are attached to an upper portion of a leg part ( 16 ), and pad surfaces ( 26 ) of the left and right pad members ( 20 ) that oppose each other face each other and are inclined so as to be closer to each other in a downward direction such that the pad surfaces come into contact with portions of a person in a sitting posture that correspond to left and right sides of the pelvis of the person, and wherein the left and right pad members ( 20 ) support an upper limb weight of a person in a sitting posture without supporting the pair of ischia from below.

1 . A chair comprising:
 a leg part; and   a pad member mounted to an upper portion of the leg part,   wherein the pad member includes left and right pad surfaces which face each other and are inclined so as to be closer to each other in a direction from up to down such that, when a person sits on the chair, the pad surfaces come into contact with portions of the person that correspond to left and right sides of a pelvis of the person, and   wherein the pad member supports an upper limb weight of the person sitting on the chair without supporting a pair of ischia of the person from below.   
     
     
         2 . The chair according to  claim 1 , wherein a lower side of the pad members is opened. 
     
     
         3 . The chair according to  claim 1 , wherein the left and right pad surfaces are inclined so as to be more distant from each other in a direction from rear to front. 
     
     
         4 . The chair according to  claim 1 , wherein the pad member is constituted of left and right individual pad members and is mounted to the leg part via a position adjustment mechanism capable of changing positions of the pad members in a direction to vary a separation distance between the left and right pad surfaces. 
     
     
         5 . The chair according to  claim 1 , wherein the pad member is mounted to the leg part via a coupling mechanism capable of fixedly securing the pad member with an arbitrary inclined attitude. 
     
     
         6 . The chair according to  claim 4 , comprising left and right backrest halves which extend upward from rear end portions of the left and right pad members, respectively, and are inclined so as to be more distant from each other in a direction from rear to front, the backrest halves in cooperation serving as one backrest. 
     
     
         7 . The chair according to  claim 1 , wherein:
 the pad member includes left and right pad members each including a base plate and a sheet-shaped cushion member attached on one face of the base plate, such that the cushion members of the left and right pad members face each other; and   the left and right pad surfaces consist of mutually facing surfaces of the cushion members and are additionally inclined so as to be more distant from each other in a direction from rear to front.   
     
     
         8 . A chair comprising:
 a leg part;   a pad member mounted to an upper portion of the leg part, the pad member including left and right pad surfaces which face each other and are inclined so as to be closer to each other in a direction from up to down; and   left and right backrest halves which extend upward from rear end portions of the left and right pad members, respectively, and are inclined so as to be more distant from each other in a direction from rear to front, the backrest halves in cooperation serving as one backrest.   
     
     
         9 . The chair according to  claim 8 , wherein the left and right pad surfaces are additionally inclined so as to be more distant from each other in a direction from rear to front.