Anti-loosening structure

The utility model provides an anti-loosening structure. The anti-loosening structure comprises a locking block, an inserting block and a fixing block. The locking block comprises a first connecting part and a second connecting part connected with the first connecting part; the first connecting part is inserted into the inserting block and is in threaded connection with the inserting block; the fixing block is provided with a through hole, one end of the through hole penetrates through one end face of the fixing block, the other end of the through hole penetrates through the other end face of the fixing block and faces the inserting block, and the second connecting part is inserted into the through hole and connected with the fixing block in a clamped mode. The connecting piece solves the problem that a traditional connecting piece cannot achieve looseness prevention and adjustment of the locking degree, and has the advantages of being simple in structure and low in manufacturing cost. 本实用新型提供了一种防松结构，锁紧块、插接块与固