knuckle joint
Fist's bending point
A knuckle joint is a hinged connection where two parts interlock like bent fingers, allowing movement in one plane.
In anatomy, knuckle joints are the finger joints themselves.
In engineering, the term describes mechanical linkages using this principle—coupling rods, toggle mechanisms, or the articulated connections between rail cars.
- handGrasping body part
- ball and socketJoint allowing rotation
- fingerHand's grasping extension
- clevisU-shaped connector with pin
- flexionDecreasing a joint angle
articulation · prosthetic limb · thumb · digit · anatomy · range of motion · robotic arm · trunnion · bone · pin · pivot · rotational motion · pipe fitting · clenching · power transfer · mechanical engineering · hinge · drive shaft