Adjustable end cup for linear guide way structure

An adjustable end cup in combination with a linear guide way structure, said linear guide way structure comprising a guide rail, a slider (20) with guide way slot (21) moveably mounted on said guide rail, and two said adjustable end cups (30);

• said slider (20) having ball return holes (22) having first-end-openings (221), and ball grooves (25) having second-end-openings (251);
• said adjustable end cup (30) having an end face rested on an end face of said slider (20) and provided with ball direction changing paths (31) each having a first-mating-end-opening (311) abutting said first-end-opening (221) of said ball return hole (22), and a second-mating-end-opening (312) abutting said second-end-opening (251) of said ball groove (25), wherein,
• said adjustable end cup (30) is provided with a adjusting slit (33) which has a determined depth so that said adjustable end cup (30) is made flexible at said adjusting slit (33), thereby adjusting the distance between said two first-mating-end-openings (311) of each of said two ball direction changing paths (31) of said adjustable end cup (30), so that said first-mating-end-opening (311) of each of said two ball direction changing paths (31) of said adjustable end cup (30) can be engaged with said first-end-opening (221) of said ball return hole (22) of said slider (20), and said second-mating-end-opening (312) of each of said two ball direction changing path (31) of said adjustable end cup (30) can be engaged with said second-end-opening (251) of said ball groove (25) of said slider (20) better.