The utility model discloses a single
wave crest dust cover which comprises a first cover body, the top end of the first cover body is fixedly connected with a second cover body, the second cover body is provided with a fixing
pipe, a
protection mechanism is arranged between the second cover body and the fixing
pipe, and the
protection mechanism comprises a first
wave crest part, a second
wave crest part and a
third wave crest part. The second wave crest part is located between the first wave crest part and the
third wave crest part, the first wave crest part, the second wave crest part and the
third wave crest part are arranged in a height progressive mode, and the second wave crest part is connected with the second cover body through the first wave crest part. The first wave crest part, the second wave crest part, the third wave crest part, the first bending groove, the second bending groove and the third bending groove are matched with one another, the first wave crest part, the second wave crest part and the third wave crest part increase the swing angle between the fixing
pipe and the second cover body, and the stretching degree of the fixing pipe and the second cover body is increased; limit pulling of the dust cover can be relieved conveniently, and the service life of the dust cover is prolonged.