Patent ID: 8864143
Filing Date: 2014-10-21
Classification: B23B,B25B,Y10S,Y10T

Abstract:
1. A small outer diameter quick release extension rod comprising: a sleeve including a through hole, the through hole including a screwdriver head accommodation portion and at least one lateral accommodation portion which is disposed at a circumference of the screwdriver head accommodation portion in a communication manner, the screwdriver head accommodation portion being provided for insertion of a screwdriver head; an operating unit, including: an operating element being a hollow structure and including a first end and a second end that are both open; a connecting rod including a connecting end and an inserting end, the connecting rod being inserted into the operating element, the connecting end extending out of the second end of the operating element for connection to a power tool; a first positioning ring being mounted on the connecting rod; a retuning spring being engaged the first positioning ring and the inserting end of the connecting rod, one end of the returning spring abutting against the first positioning ring; at least one elastic element being elongated sheet-shaped and including a body portion connected between a pushed portion and an engaging portion, an extending direction of the pushed portion being reverse to that of the body portion, and between an extending direction of the engaging portion and the extending direction of the body portion being defined an angle of 45±15 degrees, the at least one elastic element being disposed at an inner side of the operating element, the body portion of the elastic element being abutted against the connecting rod, the pushed portion of the elastic element being abutted against the returning spring, and the engaging portion of the elastic element extending out of the first end of the operating element; and a second positioning ring being connected to an inner surface of the operating element, the second positioning ring encircling the body portion of the respective elastic element and being abutted against the pushed portion of the elastic element, the operating unit being engaged on the second end of the sleeve through the first end of the operating element, and the engaging portion of the elastic element which extends out of the operating element being inserted into the lateral accommodation portion of the sleeve.