Abstract: A folding chair, comprising two sets of link assemblies that are connected to each other and are respectively located at two sides of the folding chair, wherein the link assembly comprises a least a backrest tube (2), an armrest (4), a seat tube (7), a front foot tube (8), a rear foot tube (9), a connecting tube (10) and a connecting portion, wherein the armrest (4) is rotatably connected with the backrest tube (2), wherein the connecting tube (10) is connected with the backrest tube (2), wherein the connecting tube (10) is rotatably connected with the backrest tube (2), wherein the connecting tube (10) is rotatably connected with the front foot tube (8), wherein a top end of the front foot tube (8) is rotatably connected with a top end of the rear foot tube (9), wherein the top end of the front foot tube (8) and/or the top end of the rear foot tube (9) is connected with the armrest (4), wherein the seat tube (7) is rotatably connected with the backrest tube (2) and the front foot tube (8), wherein the seat t

Abstract: A protective device is described having a membrane and a support device for the membrane, wherein the support device has an inflatable first support element with a flexible wall which forms a first pressure chamber. The first support element has a first connection port with a first connection opening. The support device has an inflatable second support element with a flexible wall which forms a second pressure chamber. The second support element has a second connection port with a second connection opening. A connection device for connecting the first connection port to the second connection port is provided, wherein the connection device has a first connection part for connecting to the first connection port and a second connection part for connecting to the second connection port. The protective device is characterised in that means are provided for connecting the first and second connection parts to one another in a detachable manner.

Abstract: A protective device is described having a membrane and a support device for the membrane, wherein the support device has an inflatable first support element with a flexible wall which forms a first pressure chamber. The first support element has a first connection port with a first connection opening. The support device has an inflatable second support element with a flexible wall which forms a second pressure chamber. The second support element has a second connection port with a second connection opening. A connection device for connecting the first connection port to the second connection port is provided, wherein the connection device has a first connection part for connecting to the first connection port and a second connection part for connecting to the second connection port. The protective device is characterised in that means are provided for connecting the first and second connection parts to one another in a detachable manner.