| 摘要 |
The present invention relates to a structure of racks . The present invention comprises; the first joint housing; and the first connecting end formed to fix the first joint housing t n external fixed point; and the first joining rotary body providing a rotating structure by joining the first joint housing and the first connecting end; and the first joint part including the first shock absorber to restrict upper and lower rotating radii where the first joint housing is rotated from the first connecting end while being formed inside the first joint housing; and the second connecting end formed to fix the second joint housing on the first joint housing; and the second joining rotary body providing a rotating structure by joining the second joint housing and the second connecting end; and the second joint part including the first shock absorber to restrict upper and lower rotating radii where the second joint housing is rotated from the second connecting end while being formed inside the second joint housing. |
