Reinforcement structure for wrench head
View Patent ↗A wrench includes a head with an engaging wheel rotatably received in a through hole in the head and a recess is defined in an inner periphery of the through hole so as to receive two pawls therein. A recessed area is defined in a surface of the head and a bridge portion is located between the through hole and the recessed area. A space is defined in an underside of the bridge portion and in communication with the through hole. Each pawl has a protrusion and the space allows the protrusions of the pawl to be inserted in the recess without any orientation adjustment. A control member is rotatably received in the recessed area and has a concavity for retaining the two protrusions therein.
1. A wrench ( 10 ) comprising:
a head ( 11 ) having a through hole ( 12 ) defined therethrough and a recess ( 14 ) defined in an inner periphery of the through hole ( 12 ), a recessed area ( 13 ) defined in a surface of the head ( 11 ) and a bridge portion ( 16 ) located between the through hole ( 12 ) and the recessed area ( 13 ), a space ( 17 ) defined in an underside of the bridge portion ( 16 ) and in communication with the through hole ( 12 );
an engaging wheel ( 20 ) rotatably received in the through hole ( 12 );
two pawls ( 30 ) and a spring ( 31 ) connected between the two pawls ( 30 ), the two pawls ( 30 ) movably received in the recess ( 14 ), each pawl ( 30 ) having a protrusion ( 303 ) which extends into the recessed area ( 13 ), and
a control member ( 40 ) rotatably received in the recessed area ( 13 ) and having a concavity ( 412 ) in which the two protrusions ( 303 ) are retained, the two pawls ( 30 ) being moved when the control member ( 40 ) is rotated.
2. The wrench as claimed in claim 1 , wherein a central hole ( 130 ) is defined through the recessed area ( 13 ) and the control member ( 40 ) includes a positioning hole ( 410 ), a bolt ( 43 ) extending through the central hole ( 130 ) and the positioning hole ( 410 ).
3. The wrench as claimed in claim 1 , wherein a central hole ( 130 ) is defined through the recessed area ( 13 ) and the control member ( 40 A) includes a rod ( 46 ) extends from an underside thereof, a retaining member ( 47 ) mounted to the rod ( 46 ) so as to position the control member ( 40 A).
4. A wrench comprising:
a head ( 11 ) having a through hole ( 12 ) defined therethrough and a recess ( 14 ) defined in an inner periphery of the through hole ( 12 ), a recessed area ( 13 ) defined in a surface of the head ( 11 ) and a bridge portion ( 16 ) located between the through hole ( 12 ) and the recessed area ( 13 ), a space ( 17 ) defined in an underside of the bridge portion ( 16 ) and in communication with the through hole ( 12 ), the space ( 17 ) allowing protrusions ( 303 ) on pawls ( 30 ) to be inserted in the recess ( 14 ) directly.