Safety hook

A safety hook comprising:

• a hook body having a base segment, a hook segment cooperating with said base segment to define a hook mouth of said hook body, and an arm segment extending between said base segment and said hook segment;
• a latch unit pivoted to said base segment so as to be rotatable relative to said hook body in a rotational direction between closed and opened positions for covering and uncovering said hook mouth, respectively, said latch unit being formed with a guiding groove which has an arcuate section and an end section that turns from said arcuate section and that is defined by an abutting wall;
• and
• a latch-locking unit connected to said latch unit and pivoted to said arm segment so as to be rotatable relative to said hook body between locked and unlocked positions for locking and unlocking said latch unit when said latch unit is disposed at the closed position, said latch-locking unit including an operating lever pivoted to said arm segment, and a limiting rod extending through said operating lever and said guiding groove, co-rotatable with said operating lever, and abutting slidingly against said arm segment, said limiting rod being received in said end section of said guiding groove when said latch-locking unit is disposed at the locked position so as to permit abutment between said limiting rod and said abutting wall, thereby blocking said latch unit from rotating in the rotational direction.