Automatic detaching structure for a hook device

An automatic detaching structure for a hook device, comprising a hook, a power unit, a tongue plate and an off-hook member, wherein said hook having a hook end and an opening and said tongue plate corresponding to said opening of said hook;

• and characterized by:
• said power unit being disposed on said hook and comprising a motor, a rotating lever, a transmission lever, and a pair of transmission wheels at respective ends of said transmission lever;
• said tongue plate being secured to said rotating lever of said power unit and driven by said rotating lever to close or to open said opening of said hook;
• and
• said off-hook member having a first end and a second end, said first end being fixed to said transmission wheel, said second end being fixed to said hook end of said hook.