Ball bearing slide

A ball bearing slide, comprising:

• at least one outer slide (1), an inner slide (2) located within the outer slide (1), a ball cage (4) located between the inner slide (2) and the outer slide (1), and three rows of balls (3) rollably arranged in the ball cage (4);
• wherein the inner slide (2) is supported by the balls (3) to slide relative to the outer slide (1) along an arrangement direction of the three rows of the balls (3);
• the outer slide (1) comprises a bottom wall (13), as well as a long wall portion (14) and a short wall portion (15) which are formed by integrally extending both sides of the bottom wall (13) and are arranged along a length direction of the bottom wall (13);
• the three rows of the balls (3) comprises a first ball row (31) and a second ball row (32) contacting an interior side of the long wall portion (14), and a third ball row (33) contacting an interior side of the short wall portion (15) and located between the first ball row (31) and the second ball row (32) in a vertical direction;
• wherein the inner slide (2) comprises a first curved part (24) against a curved surface of the first ball row (31) facing the inner slide (2), a second curved part (25) against a curved surface of the second ball row (32) facing the inner slide (2), and a third curved part (26) against a curved surface of the third ball row (33) facing the inner slide (2);
• the third curved part (26) is located between the first ball row (31) and the second ball row (32) in the vertical direction, and is symmetrically arranged relative to a symmetry axis of a line connecting centers of the first ball row (31) and the second ball row (32);
• wherein the third curved part (26) has a bottom side (263) in a width direction perpendicular to the vertical direction;
• the inner slide (2) has a central axis C-C extending in the vertical direction and passing through a central point of the inner slide (2);
• and the bottom side (263) exceeds the central axis C-C in the width direction;
• wherein a tail portion (261) of the third curved part (26) is cocked towards the third ball row (33);
• a tangent line of the tail portion (261) of the third curved part (26) and a tangent line of the short wall portion (15) together form an opening (262) with a first angle (a);
• an end of a fourth holding portion (44) extends out through the opening (262).