Cushion for protecting spinal posture

Abstract

The cushion for protecting spinal posture is for placing on a flat chair surface and includes a base member, a sacrum support member on the base member perpendicular to the flat chair surface, and a back support element at 90 or 135 degrees from the flat chair surface. The sacrum support member presses against the user's sacrum and forces the user's vertebral column to be perpendicular to the flat chair surface, thereby maintaining the straightness of the user's vertebral column.

I claim: 
     
         1 . A portable cushion for protecting spinal posture, comprising
 a base member for positioning the cushion for protecting spinal posture on a flat chair surface; and   a sacrum support member configured on the base member perpendicular to the flat chair surface against a user's sacrum when the user is seated on the base member;   wherein the base member is formed using thermoplastics with less than 5 m / m  flat piece into a concave shape; a layer of soft foam material is attached to a surface of the base member and a section of the sacrum support member that contacts the user; and both the base member and the sacrum support member are made of a material of Shore hardness greater than 80A.   
     
     
         2 . The cushion for protecting spinal posture according to  claim 1 , wherein the base member and the sacrum support member are integrally formed. 
     
     
         3 . The cushion for protecting spinal posture according to  claim 1 , further comprising a support rod extended vertically through a through opening at a rear central location of the base member and upward above the base member; wherein the sacrum support member is disposed at a top end of the support rod and is located above the base member; the sacrum support member comprises an extension element and a plate element configured on a front side of the extension element; the extension element comprises a movable sleeve having grooves inside; correspondingly, a top section of the support rod is configured with threads; the sacrum support member is movably joined to the top section of the support rod; and the sacrum support member's height is adjustable. 
     
     
         4 . The cushion for protecting spinal posture according to  claim 1 , further comprising a support rod extended vertically through a through opening at a rear central location of the base member and upward above the base member; wherein the sacrum support member is disposed at a top end of the support rod and is located above the base member; the sacrum support member comprises an extension element and a plate element configured on a front side of the extension element; and the extension element comprises a movable sleeve so that the sacrum support member is movably joined to the top section of the support rod. 
     
     
         5 . A portable cushion for protecting spinal posture, comprising
 a base member for positioning the cushion for protecting spinal posture on a flat chair surface;   a sacrum support member configured on the base member perpendicular to the flat chair surface against a user's sacrum when the user is seated on the base member; and   a back support element configured on the base member supporting the user's back when the user is seated on the base member;   wherein the base member is formed using thermoplastics with less than 5 m / m  flat piece into a concave shape; a layer of soft foam material is attached to a surface of the base member and a section of the sacrum support member that contacts the user; and both the base member and the sacrum support member are made of a material of Shore hardness greater than 80A.   
     
     
         6 . The cushion for protecting spinal posture according to  claim 5 , wherein the base member and the back support element are integrally formed; the cushion for protecting spinal posture further comprises a support rod supporting the user's weight extended vertically through a through opening at a rear central location of the base member; and the sacrum support member is disposed at a top end of the support rod. 
     
     
         7 . The cushion for protecting spinal posture according to  claim 5 , wherein the base member and the back support element are integrally formed; the back support element is at an angle of 90 or 135 degrees with the flat chair surface; the cushion for protecting spinal posture further comprises a support rod supporting the user's weight extended vertically through a through opening at a rear central location of the base member; and the sacrum support member is disposed at a top end of the support rod. 
     
     
         8 . The cushion for protecting spinal posture according to  claim 5 , wherein the back support element and the sacrum support member are individually and movably configured on the base member; the cushion for protecting spinal posture further comprises a support rod supporting the user's weight extended vertically through a through opening at a rear central location of the base member; and the sacrum support member is disposed at a top end of the support rod. 
     
     
         9 . The cushion for protecting spinal posture according to  claim 3 ,  4 ,  6 ,  7 , or  8 , further comprising a pedestal joined to a bottom end of the support rod contacting with the flat chair surface, and a reinforcing member sleeved over a bottom section of the support rod between the base member and the pedestal; wherein the reinforcing member comprises a tubular body and a support plate at a top end of the tubular body; the tubular body is sleeved over the bottom section of the support rod; and the support plate is tightly joined to and against a bottom side of the base member. 
     
     
         10 . The cushion for protecting spinal posture according to  claim 1  or  5 , wherein the base member comprises a concaved basin section whose curvature conforms to that of the user's buttocks and a front section contacting the rear sides of the user's thighs; and the front section is forwardly extended from a front edge of the basin section.