Joint mechanism

A joint mechanism of a knee orthosis or knee prosthesis, comprising:

• a first part;
• a second part being pivotable relative to the first part;
• a connector configured to fasten the joint mechanism on a user of the knee orthosis or knee prosthesis;
• a locking mechanism having a positive locking element and a recess, the recess being formed in the first part, and the positive locking element being mounted on the second part and having a locking portion arranged to engage the recess to prevent pivoting of the first and second parts relative to one another in a flexion direction when the positive locking element is in a locked position, and the locking portion permits the first part to pivot relative to the second part when the positive locking element is in a released position;
• wherein the positive locking element includes a bolt with a round or oval cross section, which when engaged in the recess provides the locked position, and a flattened portion which when aligned with the recess provides the released position.

A joint mechanism of a knee orthosis or knee prosthesis, comprising:

• a locking mechanism having a positive locking element and a recess;
• a first part carrying the recess;
• a second part pivotably mounted to the first part and carrying the positive locking element;
• wherein the positive locking element includes a locking portion and is rotationally movable between a locked position in which the locking portion engages the recess to restrict relative pivotal movement between the first and second parts in a flexion direction, and a released position in which the locking portion is removed from the recess to permit relative pivotal movement between the first and second parts in the flexion direction;
• wherein the positive locking element includes a bolt with a round or oval cross section, which when engaged in the recess provides the locked position, and a flattened portion which when aligned with the recess provides the released position.