Frame structure of game fence

A frame structure of a game fence, including a set of bottom connecting rods (1), a set of upper connecting rods (2), and a set of support connecting rods (3), each bottom connecting rod (1) is hinged with a respective bottom end of one of the support rods (3) and each upper connecting rod (2) is hinged with a respective top end of one of the support rods (3) to form the frame structure;

• a first control joint (4) is provided in the middle of one of the upper connecting rods (2), allowing two ends of said upper connecting rod (2) to move toward each other or away from each other, wherein a second control joint (5) is provided in the middle of one of the bottom connecting rods (1), allowing two ends of said bottom connecting rod (1) to move toward each other or away from each other, causing the frame structure to contract or expand, and after the frame structure is completely expanded, said one bottom connecting rod (1) can be locked by the second control joint (5);
• wherein the second control joint (5) includes a first connecting base (51) and a second connecting base (52) that are mutually hinged, said one bottom connecting rod (1) is structurally hollow, said one bottom connecting rod (1) includes a first bar member (11) connected to the first connecting base (51) and said one bottom connecting rod (1) includes a second bar member (12) connecting to the second connecting base (52), the first connecting base (51) is movably provided with a locking member (53) that can move relative to the first connecting base (51) between a position where the locking member (53) partially extends into the second bar member (12) and a position where the locking member (53) withdraws from the second bar member (12), and after the locking member (53) partially extends into the second bar member (12), the locking member (53) can lock the first connecting base (51) and the second connecting base (52), thereby locking the first bar member (11) and the second bar member (12);
• wherein a top spring (54) is also provided within the second control joint (5) for applying elastic force to the locking member (53) so that the locking member (53) can move in a direction of local extension into an interior of the second bar member (12);
• wherein the top spring (54) is located inside the first bar member (11), the top spring being entirely exposed within the interior of the first bar member (11), the first bar member (11) is provided with a pin that can partially pass through the first bar member (11), one end of the top spring (54) is in contact with the pin, and the other end of the top spring is elastically in contact with a terminal end of the locking member (53) that faces away from the second bar member (12).