PIVOTAL ASSEMBLY FOR HAND TOOL

摘要

A hand tool includes a body and a ratchet head which is pivotably connected to the body. A pawl and a controller are connected to the body. The ratchet head is engaged with the pawl by first and second engaging teeth. The controller has a recess which has two curved faces. The controller has two grooves and each groove has a first stop face and a second stop face. The first and second stop faces contact the two curved faces. The pawl is not moveable, and the first engaging teeth are engaged with the second engaging teeth so as to fix the ratchet head relative to the body at an angle. When the two curved faces are moved to face the two grooves, the controller is moved, and the ratchet head is pivotable relative to the body.

主权项

1. A hand tool comprising:
a body having a pivotal portion on one end thereof, the pivotal portion having a U-shaped recess, a hole defined through the pivotal portion, a first recess extending axially from an inner end of the U-shaped recess along the body, and communicates with the U-shaped recess, a third recess radially defined through the body and communicating with the first recess; a ratchet head having a pivotal end which is pivotally connected to the pivotal portion by extending a pin through the pivotal portion and the pivotal end, multiple first engaging teeth defined in an outer surface of the pivotal end; a pawl having a tubular portion which is located in the first recess, at least one second engaging tooth formed on an end of the tubular portion and engaged with the first engaging teeth, the pawl having a fourth recess and a fifth recess defined transversely therethrough, an axis of the fourth recess being perpendicular to an axis of the fifth recess, the fifth recess defining two curved faces formed on two sidewalls of the fourth recess, a minimum distance being defined between the fourth recess and the curved faces that is located closest to the inner end of the at least one second engaging tooth, the minimum distance being larger than a distance which allows the at least one second engaging tooth to disengaged from the first engaging teeth, and a controller being a cylindrical member and located in the third recess, two grooves separately and radially defined in an outer surface of the controller, a portion of a body of the controller located between the two grooves, a first stop face being defined on the outer surface of the controller and located adjacent to each of the grooves, a second stop face being defined on an outer face of the portion of the body of the controller between the two grooves, the first and second stop faces having the same radius as the curved faces, a minimum width of each of the grooves being larger or equal to a maximum width of each of the two curved faces, when either one of the first stop faces and the second stop face are respectively in contact with the two curved faces, the at least one second engaging tooth is engaged with the first engaging teeth, and one of the two grooves is located corresponding to the fourth recess, when either one of the first stop faces and the second stop face are respectively in contact with the two curved faces, one of the first and second stop faces is located corresponding to the fourth recess, the pawl 30 is pushed toward the groove, the at least one second engaging tooth is disengaged from the first engaging teeth.