Knee or elbow pad

Claim 1

A knee or elbow pad comprising: an inverted U-shaped stable member having a curved covering portion, two bending crosswise edges extending inward to fit and move lengthwise in fitting openings in two trapezoidal curved movable members, two end joining portions respectively bored with a rivet hole; two trapezoidal curved movable members to be combined symmetrically with said inverted U-shaped stable member, respectively having a curved crosswise portion, a front and rear curved crosswise blocking fence spaced apart in an intermediate portion, a fitting opening defined by said front and rear blocking fences for the two bending crosswise edges to fit and move therein, a declined crosswise portion opposite the curved crosswise portion, a groove along a bottom edge, and two end joining portions respectively bored with a rivet hole; and said two trapezoidal curved movable members which spread and contract in relation to said stable member with rivets as pivots when the pad is worn on a knee or elbow and the knee or elbow is bent and straightened, said two movable members being sewn on an intermediate portion of a cotton pad, said bending edges of said stable member being blocked by the front blocking fences of said movable members when the knee or elbow is straightened, said bending edges of said stable member being blocked by the rear blocking fences of said movable members when the knee or elbow is bent, said movable members thus being moved to spread and contract in relation to said stable member to conform to the position of the knee or elbow when it is bent and straightened.