Retention assembly and chassis having the same

A retention assembly for positioning a mounting component slidably arranged on a frame, comprising:

• a main body defining a receiving cavity, the receiving cavity defines a first opening at a first end of the main body, the main body is connected to the frame at the first end;
• a retention ball received in the receiving cavity, a diameter of the retention ball is larger than a diameter of the first opening;
• and
• an elastic member located in the receiving cavity, the elastic member is arranged between the retention ball and a bottom of the receiving cavity for pressing the retention ball towards the first opening, the elastic member is configured for pressing the retention ball to protrude from the receiving cavity and insert into a positioning hole of the mounting component when the positioning hole is aligned with the retention ball.

A chassis comprising:

• a frame;
• a mounting component slidably mounted on the frame, the mounting component is configured for carrying electronic components, and the mounting component defines a positioning hole;
• and
• a retention assembly comprising:
• a detent cylinder comprises a first end and a second end opposite to the first end, the first end defines a first opening, the second end defines a second opening, the detent cylinder defines a receiving hole communicates with the first opening and the second opening, and a diameter of the receiving hole gradually decreases towards the first opening, the detent cylinder is connected to the frame at the first end;
• a cap connected to the second end of the detent cylinder for covering the second opening and enclosing the receiving hole;
• a retention ball located in the receiving hole, a diameter of the retention ball is larger than a diameter of the first opening, and
• an elastic member located in the receiving hole, the elastic member is arranged between the retention ball and the cap for pressing the retention ball towards the first opening, the elastic member is configured for pressing the retention ball to protrude from the receiving hole and insert into the positioning hole of the mounting component when the positioning hole is aligned with the retention ball.