| 摘要 |
PURPOSE: To support bending and stretching sections of a body positionally different depending on a user, on a curved bottom without any feeling of physical disorder, and improve strength. CONSTITUTION: A curved bottom 21 is laid and mounted on a recess formed on a joint section of a knee bottom 14a and a leg bottom 14b. Also, surfaces of the joint section of the knee bottom 14a and the leg bottom 14b faced to the curved bottom 21 are formed to be cylindrical, and the cylindrical surfaces are kept in contact with the curved bottom 21, thereby supporting the bottom 21 in a curved state having the prescribed radius of curvature. Also, a contact area between the cylindrical external surface and the curved bottom 21 is established, so as to give a maximum value when the bottoms 14a and 14b are displaced maximally. According to this construction, Ell; stretching and bending sections of a body can be supported on the curved bottom 21 without any feeling of physical disorder. Also, strength is substantially improved, due to an enlarged contact area between the curved bottom 21 and a joint section for the support thereof. |
