Instep flexion -extension movement ware of countable

Instep flexion -extension movement ware of countable is including bottom plate, commentaries on classics board, extension spring, the spacing support of front bearing frame and back, change the boardthrough pivot movable mounting at the bottom plate middle part to separate the bottom plate upper surface for regional A and regional B, front bearing frame rigid coupling is on the bottom plate, andextension spring one end is connected on the regional A of bottom plate, and the other end is connected on changeing the board, and it forces through the pulling force changes the board and support onthe front bearing frame, the spacing support rigid coupling in back on the bottom plate, when changeing the board and overcome tension of a tension spring under the exogenic action and rotates to regional B direction, final spacing support counterbalance after and maxmizing stroke. The utility model has the advantages of, patient's accessible the utility model discloses be instep flexion -extension movement, the counter ca