Connection component and cart

A connection component, comprising a connection rod and a connection sleeve, wherein the connection rod comprises a first buckle part disposed at a first end and a second buckle part disposed at a second end, the first buckle part comprises a first buckle seat, a first buckle protrusion, and a first connector, and the first buckle protrusion and the first buckle seat are connected by using the first connector;

• the first buckle part and the second buckle part are disposed opposite to each other in a radial direction of the connection rod, an avoidance space fitting with the second buckle part is reserved on the first buckle part, and an avoidance space fitting with the first buckle part is reserved on the second buckle part;
• the second buckle part comprises a second buckle seat, a second buckle protrusion, and a second connector, the second buckle protrusion and the second buckle seat are connected by using the second connector, a distance between the first buckle seat and the first buckle protrusion is less than a distance between the second buckle seat and the second buckle protrusion, and the first connector and the second connector are each made of a plastic material;
• a first opening and a second opening that face opposite directions and are running through are disposed on the connection sleeve, a first limiting part and a second limiting part are disposed on an inner wall of the connection sleeve, the first limiting part is disposed at a middle part of the inner wall, the second limiting part is disposed on the inner wall on a side opposite to the first limiting part, and the second limiting part is flush with an edge of the second opening;
• and
• the first buckle part may be inserted into the connection sleeve through the second opening, the first buckle protrusion is buckled with the first limiting part, the first buckle seat abuts against the edge of the second opening, the second buckle part may be inserted into the connection sleeve through the first opening, the second buckle protrusion is buckled with the second limiting part, and the second buckle seat abuts against an edge of the first opening.