| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable switching into at least two states with different heights by changing the attitude of the leg without using the assisting tool for adjusting the height. <P>SOLUTION: A leg 10 is constituted of an X-shaped mold member 13, in which a pair of rectangular plate members 11, 12 having approximately the same size are crossed at the center and fixed. Four V-shaped spaces 15, 16 having a horizontal crossing position 14 of plate members as an apex are formed. The right and left spaces 15 forming a pair are identical, and further the upper and lower spaces 16 forming a pair are identical. Also, the included angles of two V-shaped adjacent spaces 15, 16 are different from each other, and the total sum of adjacent different angles is 180°C. <P>COPYRIGHT: (C)2012,JPO&INPIT |
