Pet cage

A pet cage, comprising

• a plurality of side frames which define a containing space, the plurality of side frames at least comprise a first side frame, a second side frame and a third side frame to define a connecting pore;
• the connecting pore is communicated with the containing space;
• and
• a coupling assembly having an assembled state and a disassembled state;
• when the coupling assembly is in the disassembled state, the coupling assembly is separable from the connecting pore;
• when the coupling assembly is in the assembled state, at least part of the coupling assembly is located in the connecting pore, and the first side frame, the second side frame and the third side frame are positioned and connected together by the coupling assembly;
• wherein the coupling assembly comprises a first piece, a second piece and a third piece;
• when the coupling assembly is in the assembled state, part of the first piece penetrates through the connecting pore, and both ends of the first piece cooperate with the second piece and the third piece respectively, so that part of the first side frame, part of the second side frame and part of the third side frame are simultaneously pressed between the second piece and the third piece;
• and when the coupling assembly is in the disassembled state, the first piece is separable from the connecting pore;
• wherein a rotation centerline is provided in a penetration direction of the connecting pore;
• the first piece comprises a first connecting portion provided to extend towards the connecting pore;
• the first connecting portion is capable of relatively rotating around the rotation centerline to cooperate with the connecting pore;
• the first piece rotates between a disassembled position where the first connecting portion is capable of relatively moving in an extending direction of the rotation centerline and the coupling assembly is in the disassembled state, and an assembled position where the first connecting portion cooperates with the second piece to restrain the first piece from moving in the extending direction of the rotation centerline;
• wherein the second piece comprises a second main body and a second extension body extending outward from the second main body;
• the second extension body is provided within the containing space and abuts against at least one of the first side frame, the second side frame and the third side frame, so as to restrain the second piece from moving in an axial direction of the rotation centerline towards a direction away from the containing space;
• a limiting structure is provided between the first connecting portion and the second main body;
• the limiting structure comprises a convex portion, a first groove and a second groove;
• one of the first connecting portion and the second main body is provided with the convex portion, and the other one of the first connecting portion and the second main body is provided with the first groove and the second groove;
• the first groove extends in an extending direction of the rotation centerline;
• the second groove extends in a circumferential direction of the rotation centerline and communicates with the first groove;
• and when the coupling assembly is switched from the disassembled state to the assembled state, the convex portion first slides in an extending direction of the first groove to be positionally opposite to the second groove, and then the convex portion rotates to the second groove in the circumferential direction of the rotation centerline where the first connecting portion is restrained from moving away from the containing space along the axial direction of the rotation centerline.