Patent ID: 8858479

Claim:
A joint Positioning device comprising: a restriction frame having a first straight section, a second straight section and two transverse sections, the two transverse sections connected between the first and second straight sections and each of the two transverse sections including multiple connection plates which are pivotably connected to each other, each of the connection plates including a pivot portion and a reception portion on two ends thereof, the reception portion having a slot with which the pivot portion is pivotably engaged, the first straight section having two pivot portions on two ends thereof and the second straight section having two reception portions on two ends thereof, the pivot portions of the first straight section and the reception portions of the second straight portion located corresponding to the two transverse sections respectively, the pivot portions of the first straight section each being connected with the reception portions of the connection plates on the transverse sections, the reception portions of the second straight section each having a slot with which the pivot portion of each of the transverse sections is engaged, the pivot portion of each connection plate having a flange extending therefrom and the reception portion of each connection plate having an engaging groove with which the flange is engaged to connect the two adjacent connection plates, multiple through holes defined through a body of the connection plate and the through holes located beside the pivot portion corresponding thereto, at least one semi-closed slot defined in the reception portion, a block portion formed at the reception hole and the at least one semi-closed slot, multiple hooks formed at the reception portion that has no semi-closed slot and the hook being located corresponding to the at least one through hole.