Wiper connector and bolt-stabilizing sleeve adaptor

A bolt-stabilizing sleeve adaptor engaged with a wiper arm for adapting a base of a wiper connector onto a bolt of the wiper arm, comprising:

• a sleeve tube having a tube body, a first flange, and a second flange respectively extending from two ends of the tube body, wherein the sleeve tube has a pivoting hole defined therein, and an opening formed at one end of the pivoting hole being accommodatable for a bolt of the wiper arm, wherein a hollow interior inside the first flange is formed with a receiving compartment;
• a fastening member having a circular ring body, an interfering portion and a plurality of flexible abutting portions;
• wherein the circular ring body is a continuous ring-shaped structure without gaps;
• wherein the abutting portions are inwardly protruding from an inner fringe of the circular ring body, wherein the fastening member is fixed in the receiving compartment of the first flange, wherein the interfering portion is extended outward from an outer circumferential portion of the circular ring body, and the interfering portion is fixedly mounted in an inner wall of the receiving compartment through frictional contact, wherein the abutting portions extend slantingly towards an inserting direction of the bolt slanted to the circular ring body, and the interfering portion extends away from the inserting direction of the bolt slanted to the circular ring body;
• wherein the bolt is insertable into the pivoting hole via the fastening member from the first flange of the sleeve tube, and the bolt contacts the flexible abutting portions and pushes the flexible abutting portions to incline toward the pivoting hole;
• wherein a circumferential portion of the bolt is tightly engaged by the plurality of abutting portions;
• and
• wherein the first flange has a diameter larger than a diameter of the second flange.