Abstract: In a heel piece of a ski binding of the type wherein the fore end of the heel piece is pivotally connected to a base plate which is secured to the ski, a locking member is provided for releasably locking the heel piece to the base plate. When the heel piece is locked it is impossible for the skier to vertically rotate the heel piece so that the state of the ski becomes suitable for climbing up a slope, whereas when the heel piece is unlocked, it is possible to vertically rotate the heel piece so that the state of the ski becomes suitable for walking or running on a horizontal surface.

Abstract: A heel piece of a ski safety binding which automatically opens when an excessive force is exerted on the ski boot. The heel piece includes a pair of arms pivotally connected to a base plate, a frame pivotally connected to a pivot pin extending between the pair of arms, which frame is displaceable along the axis of the ski, a heel holding member provided at the front end of the frame and a lock piece disposed in the frame and being displaceable along the axis of the ski relative to the frame. The lock piece has a cam surface which engages a lock pin provided between the pair of arms in a normal state of use. When a strong upwardly directed force is applied to the heel holding member as in a case of a forward fall of the skier, the frame and lock piece displace rearwardly and thereby brings the lock pin out of engagement with the cam surface of the lock piece, enabling the heel piece to rotate for releasing the heel of the ski boot.

Abstract: A ski binding is provided with a front metal fitting which comprises a base plate secured to the ski, a block and a spring seat slidably mounted on the base plate, a compression spring interposed between the block and the spring seat, a lever pivotally mounted on the base plate and connected to the spring seat and a locking mechanism interposed between the block and the lever so that the lever is released when an excessive force is applied to the block from the heel piece in the rearward direction, thus safeguarding the skier.