Enhanced safety hook

An enhanced safety hook, comprising:

• a hook body having a front side and a rear side, wherein said hook body has a hook hole, a pin slot and a guide slot penetrating said front side and said rear side, wherein said hook hole has a hook opening provided along a first side edge of said hook body, wherein said hook body comprises a hook end formed at a top end thereof, wherein said pin slot is provided at a position below said hook opening;
• a latch member, wherein said latch member comprises:
• a main plate and two side plates defining an upside-down U-shape frame;
• a peripheral edge bridged between said two side plates in such a manner that a top end of said latch member constructs a mouth for receiving said hook end;
• a guide arm connected to said two side frames to couple with said guide slot;
• and a pin element coupling with said pin slot, wherein said pin element is movably provided in said pin slot in such a manner that said mouth of said latch member is capable of detaching from said hook end so that said latch member unlocks said hook opening by means of a rotation of said pin element in said pin slot, whereby said guide arm slides in said guide slot for preventing said latch member from having contact with said inner wall of said hook body along said hook hole;
• an operation handle pivotally connected to said hook body by a pivot arm, wherein said operation handle has a rotation hole for said pin element to pass through so as to enable said pin element to move in said pin slot;
• and a spring member retaining said latch member in a position that said latch member tends to lock said hook hole, wherein said guide slot forms an arc shape path with said pin hole as an arc center, wherein a side of said guide slot is communicating with said hook hole, wherein when said pin element is in said pin slot, said guide arms are in said hook hole, wherein when said pin element moves from said pin slot into said pin hole, said guide arm moves to a position corresponding to said guide slot, so that said guide arm moves in said guide slot during said latch member locking or unlocking said hook opening.

An enhanced safety hook, comprising:

• a hook body having a front side and a rear side, wherein said hook body has a hook hole, a pin slot and a guide slot penetrating said front side and said rear side, wherein said hook hole has a hook opening provided along a first side edge of said hook body, wherein said hook body comprises a hook end formed at a top end thereof, wherein said pin slot is provided at a position below said hook opening;
• a latch member, wherein said latch member comprises:
• a main plate and two side plates defining an upside-down U-shape frame;
• a peripheral edge bridged between said two side plates in such a manner that a top end of said latch member constructs a mouth for receiving said hook end;
• a guide arm connected to said two side frames to couple with said guide slot;
• and a pin element coupling with said pin slot, wherein said pin element is movably provided in said pin slot in such a manner that said mouth of said latch member is capable of detaching from said hook end so that said latch member unlocks said hook opening by means of a rotation of said pin element in said pin slot, whereby said guide arm slides in said guide slot for preventing said latch member from having contact with said inner wall of said hook body along said hook hole;
• an operation handle pivotally connected to said hook body by a pivot arm, wherein said operation handle has a rotation hole for said pin element to pass through so as to enable said pin element to move in said pin slot;
• a spring member retaining said latch member in a position that said latch member tends to lock said hook hole, and a trigger arrangement having two stoppers outwardly protruded on said two side panels respectively and two indents formed in said two side plates of said latch member corresponding to said two stoppers, wherein when said spring member retains said operation handle in position, said two stoppers engage with said two indents respectively, so that said end panel of said operation handle is retained in said slot opening so as to retain said pin element in said pin hole, wherein when a predetermined force which overcomes said resilient force of said spring member is applied to press said operation handle, said two stoppers escapes from said two indents with respect to said pivot arm respectively.

An enhanced safety hook, comprising:

• a hook body having a front side and a rear side, wherein said hook body has a hook hole, a pin slot and a guide slot penetrating said front side and said rear side, wherein said hook hole has a hook opening provided along a first side edge of said hook body, wherein said hook body comprises a hook end formed at a top end thereof, wherein said pin slot is provided at a position below said hook opening;
• a latch member, wherein said latch member comprises:
• a main plate and two side plates defining an upside-down U-shape frame;
• a peripheral edge bridged between said two side plates in such a manner that a top end of said latch member constructs a mouth for receiving said hook end;
• a guide arm connected to said two side frames to couple with said guide slot;
• and a pin element coupling with said pin slot, wherein said pin element is movably provided in said pin slot in such a manner that said mouth of said latch member is capable of detaching from said hook end so that said latch member unlocks said hook opening by means of a rotation of said pin element in said pin slot, whereby said guide arm slides in said guide slot for preventing said latch member from having contact with said inner wall of said hook body along said hook hole;
• an operation handle pivotally connected to said hook body by a pivot arm, wherein said operation handle has a rotation hole for said pin element to pass through so as to enable said pin element to move in said pin slot;
• and a spring member retaining said latch member in a position that said latch member tends to lock said hook hole, wherein said hook body further has a receiving slot penetrating said front side and said rear side of said hook body, wherein said receiving slot has a slot opening along a second side edge of said hook body, wherein said operation handle comprises an end panel, two side panels connected to said end panel, a pivot arm coupled with said two side panels, and a rotation hole provided in said two side panels, wherein said spring member retains said end panel to be in said slot opening, wherein when an end of said operation handle swings towards said receiving slot about said pivot arm, said pin element is driven to bring said mouth of said latch member away from said hook end, wherein when said end panel returns to be positioned in said slot opening, said operation handle just drives said pin element to make said mouth of said latch member be back to engage with said hook end.