LOW PROFILE SCREW BASE AND ASSEMBLY METHOD FOR POSITIONING COMPRESSION RING

摘要

A low profile screw base and an assembly method for a positioning compression ring thereof. The low profile screw base comprises a screw base body (3) and a positioning compression ring (4). An assembly hole penetrates longitudinally through the screw base body (3). A U-shaped slot (2) for a connecting rod to pass through is provided on an upper portion of the screw base body (3). The inner wall of the screw base body (3) on the opposite sides of the U-shaped slot (2) is provided with internal threads (1). Snap tabs (6) are formed on the inner wall of the screw base body (3) on the opposite sides of the U-shaped slot (2) below the internal threads (1). A lower ball socket matched with the round head of the round head screw is arranged in the assembly hole of the lower portion of the screw base body (3). The positioning compression ring (4) used for compressing the round head is snap fitted above the lower ball socket and below the snap tabs (6). The positioning compression ring (4) comprises a cylindrical annular body (7). An upper ball socket matched with the round head is provided at a lower end of the annular body (7). A rod containing groove (10) matched with the connecting rod is provided at an upper end of the annular body (7). Limiting flange rings (8) matched with the snap tabs (6) are provided on the upper portion of the annular body (7) on the left side and right side of the rod containing groove (10). A rotation-preventing lug (9) is provided on the outer wall of the annular body (7) above the limiting flange rings (8), and a rotation-preventing groove (5) matched with the rotation-preventing lug (9) is provided on the snap tabs (6). The screw base has the advantages of small diameter and low profile.