pop-up tent       
noun [ C ] uk/ˌpɒp.ʌp ˈtent/ us/ˈpɑːp.ʌp ˌtent/
 弹出式帐篷|充气帐篷
a tent that is ready to use as soon as it is unfolded, without a frame having to be built first
  We got a little pop-up tent to use on the beach. 我们买了一个在沙滩上用的弹出式帐篷。 
 - More examples
 - Pop-up tents can easily get blown away by the wind.
 - This pop-up tent is so easy to use even a child could assemble it.
 - Unlike other pop-up tents, which are designed just for children, this one is large enough to keep the whole family out of the sun's harmful rays.