The invention discloses a center lock structure, comprises a chassis, rotary sliding sleeve and a center rod, the top of the rotary sliding sleeve is circumferentially and slidely connected with the chassis; and the center rod is extended into the rotary sliding sleeve along the top of the chassis, an elastic member is provided at one side on the bottom of the center rod, the elastic member is exposed outside the center rod when there is no external force, and the elastic member is concealed in the center rod when squeezed by an external force; in the invention, by the center rod, upper and lower rotary sliding sleeve, through holes and the accommodating grooves for pressing or releasing the elastic member, the structure can be unlocked by rotation and pull-down.

A leg tube sliding locking mechanism for opening and closing a folding tent includes a sliding support sleeved on a leg tube, a jump bead, and a V-shaped spring. One end of the V-shaped spring is connected to the jump bead, and the other end of the V-shaped spring is fixed to an inner wall of the leg tube. A bushing is installed on an inner wall of the sliding support in a fitted manner. An upper end of the busing extends downward to form a pressing sheet, and the pressing sheet has a lower end extending outwards to a lower end of the sliding support. The pressing sheet covers the jump bead.

A leg tube sliding locking mechanism for opening and closing a folding tent includes a sliding support sleeved on a leg tube, a jump bead, and a V-shaped spring. One end of the V-shaped spring is connected to the jump bead, and the other end of the V-shaped spring is fixed to an inner wall of the leg tube. A bushing is installed on an inner wall of the sliding support in a fitted manner. An upper end of the busing extends downward to form a pressing sheet, and the pressing sheet has a lower end extending outwards to a lower end of the sliding support. The pressing sheet covers the jump bead.

A portable room includes a number of sides, where a first side of the number of sides includes a first door, a second side of the number of sides includes a port, and the second side is adjacent to the first side. The portable room also includes a roof attached to the number of sides. The portable room further includes a number of pockets integrated with the roof, where each pocket is configured for receiving a filter.

A portable room includes a number of sides, where a first side of the number of sides includes a first door, a second side of the number of sides includes a port, and the second side is adjacent to the first side. The portable room also includes a roof attached to the number of sides. The portable room further includes a number of pockets integrated with the roof, where each pocket is configured for receiving a filter.

Disclosed is a double-spliced foldable tent with central lifting and automatic opening and closing structure, including two groups of central tops, one group of middle frame and two groups of edge frames. Any group of edge frame and middle frame are connected by telescopic fork frame. Two groups of side inclined frames are arranged between a group of central top and middle frame. At least one group of side inclined frame is arranged between a group of central top and a group of edge frame. One group of central tops includes an upper top and a lower support locked or separated by spring pin. One group of side inclined frame includes a first inclined rod hinged on upper top at one end and a second inclined rod hinged on lower support at one end, of which the other end is hinged on the side wall of first inclined rod.

An awning mounting rack includes four stand columns; a first folding bracket is disposed between two adjacent stand columns; each stand column has a top holder. The top holder includes a first pole, a second pole and a support pole. The four stand columns include two first stand columns and two second stand columns; the other ends of the second poles connected to the first stand columns are pivot joined to the first top set, the non-end portions of the second poles connected to the first stand columns are respectively pivot joined to a first support rod, the ends of the first support rods are pivot joined to a first bottom set; the other end of the second poles connected to the second stand column are pivot joined to a second top set, the non-end portions of the second poles are pivot joined to a second support rod.

An awning mounting rack includes four stand columns; a first folding bracket is disposed between two adjacent stand columns; each stand column has a top holder. The top holder includes a first pole, a second pole and a support pole. The four stand columns include two first stand columns and two second stand columns; the other ends of the second poles connected to the first stand columns are pivot joined to the first top set, the non-end portions of the second poles connected to the first stand columns are respectively pivot joined to a first support rod, the ends of the first support rods are pivot joined to a first bottom set; the other end of the second poles connected to the second stand column are pivot joined to a second top set, the non-end portions of the second poles are pivot joined to a second support rod.

Disclosed is a foldable tent with central lifting and automatic opening and closing structure, including a central bracket group and inclined frames. The central bracket group includes an upper frame and a base bracket. The inclined frame includes a first inclined rod hinged with the upper frame at one end, and a second inclined rod hinged with the first inclined rod at one end. The upper frame includes an upper top and a middle piece. The upper top is provided with a mounting hole in a non-circular structure. The middle piece is provided with an upper section and a lower section both in a non-circular structure. The lower section is provided with a spring pin. The base bracket is provided with an insertion hole in a non-circular structure. The side wall of the insertion hole is provided with a pin hole capable of locking the spring pin.

A variable shape three-dimensional structure includes: an upper frame; a lower frame; and a longitudinal coupling member that couples the upper and lower frames. Each of the frames includes cross units and an end coupling portion. Each cross unit is formed by two rigid members crossing each other and pivotally coupled together. The end coupling portion pivotally couples the ends of the rigid members of the cross units. The longitudinal coupling member includes a bent unit comprising a first and second bent rigid members, and a bent portion coupling shaft. The first and second bent rigid members are bent in a V-shape. The bent portion coupling shaft pivotally couples the bent portions of the first and second bent rigid members. The upper end of the bent unit is coupled to the upper frame and the lower end of the bent unit is coupled to the lower frame.