Patent ID: 7895924

Claim:
A socket connection device comprising: a main body having a front end as an insertion end; an axial slide passage being formed in the main body; a through hole being formed on a circumference of the insertion end in communication with the slide passage; a slide rod installed in the slide passage of the main body and slidable along the slide passage; a shallow depression and a deep depression being formed on a circumference of a front end of the slide rod, the deep depression being positioned behind the shallow depression; a resilient member disposed between the main body and the slide rod, whereby in normal state, under resilient force of the resilient member, the slide rod tends to move rearward to an engaging position where the shallow depression is positioned in alignment with the through hole; a ball body inlaid in the through hole of the main body and movable along the through hole, whereby in normal state, a bottom edge of the ball body falls on the shallow depression of the slide rod and a top edge of the ball body protrudes out of the main body; when the slide rod moves forward to a releasing position, the shallow depression moving away from the through hole, while the deep depression approaching the through hole, whereby the ball body moves into the deep depression; and said socket connection device being characterized in that in the normal state, the ball body is positioned in the shallow depression with a center and a bottommost edge of the ball body positioned outside a bottom wall of the shallow depression; in an axial direction of the slide rod, an axial length of the shallow depression is shorter than a radius of the ball body.