Abstract: A tow hook device includes a tow ball body, a tow ball hitch and a tow arm. The tow ball body includes at least one tow ball and a tow ball rod connected to the at least one tow ball, and the tow ball body further includes at least one plunger disposed on the tow ball rod. The tow ball hitch is connected to the tow ball body by the at least one plunger. The tow ball hitch is fixedly connected to the tow arm. The tow hook device has a reasonable structure, great practicality, flexible installment and disassembly, convenient use and improved work efficiency.

Abstract: An anti-collapse inflatable air mattress includes an inflatable air mattress body. The inflatable air mattress body includes a top sheet, a side sheet and a bottom sheet. The top sheet, side sheet and bottom sheet define an inflatable cavity. The anti-collapse inflatable air mattress includes at least one elastic support device in the inflatable cavity, an end of the at least one elastic support device is connected to the top sheet, and another end of the at least one elastic support device is connected to the bottom sheet. The at least one elastic support device are two elastic support devices juxtaposed with each other, and each elastic support device includes a spring wire or a spring column. The anti-collapse inflatable air mattress has advantages of reasonable structure, strong practicability, convenient use and safety, and the anti-collapse inflatable air mattress can prevent collapse and prolong the service life.