Patent ID: 6913413

Claim:
A coupling lock, comprising: a barrel shaped lock base having a hole along an axial direction thereof and an annular slot at an outer surface closing to an end thereof; a core member received in said hole of said lock base having a core plug at an end thereof running out of said hole of said lock base and a connecting portion at a distal end of said core plug; a driving member having a connecting hole at center and two driving portions respectively at opposite ends thereof such that said driving member is coupled with said core member by said connecting hole of said driving member receiving said connecting portion of the core member therein; a locking assembly having at least two locking members and at least two elastic members, wherein each of said locking members has two pivoted portions to be received in said slot of said lock base for pivoting said locking members on the opposite sides of said lock base respectively and a hooking portion at an end thereof, and said elastic members have ends thereof fixed on said lock base and other ends thereof resting against said locking members respectively; a housing having a stepped central hole to receive said core member in a larger section thereof and to secure said core member therein, and a locking plug having a head portion at an end thereof, a connecting end at the other end thereof and an annular locking slot closing to said connecting end; whereby said connecting end of said locking plug can be inserted into a smaller section of said central hole of said housing to make said hooking portions of said locking members running into said locking slot of said locking plug and said elastic members will push said locking members respectively to make said hooking portions being received in said locking slot stably.