Patent ID: 11964365
Assignee: FINE FORGE INDUSTRY CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 4:
5. The hand tool of claim 4, wherein each of the plurality of positioning slots defines a first central line extending between the two side walls, the first central line intersects with the axis, and the two side walls and the first central line are in parallel; the hand tool further includes an elastic member, the elastic member is disposed between the second member and the control member, and the elastic member biases the control member to move toward the lock position; the control member includes a concave-convex structure for frictional grip; the plurality of positioning slots extend from the first end portion to the second end portion, the first member includes a connection hole within which a plurality of meshing teeth are disposed, and the plurality of meshing teeth are configured to be engaged within the plurality of positioning slots so that the first member and the shaft are movable with each other; the at least one tooth includes a plurality of teeth, the plurality of the teeth includes a first tooth and a plurality of second teeth, the plurality of the second teeth are located at opposing sides of the first tooth, a second central line of the first tooth intersects with the axis; when the first tooth in inserted within the positioning slot, portions of the two blocking walls of the first tooth within the positioning slot are in gapless surface contact with the two side walls; when the second tooth is inserted within the positioning slot, the portion of one of the two blocking walls of the second tooth within the positioning slot is in gapless surface contact with one of the two side walls, and the portion of the other of the two blocking walls of the second tooth within the positioning slot and the other of the two side walls form a gap therebetween; the gap is formed between the blocking wall of the second tooth adjacent to the first tooth and one of the two side walls of the positioning slot, and the gap enlarges radially outward relative to the shaft; the number of the plurality of the teeth is odd; the control member further includes a limitation hole, an end of the elastic member is inserted within the limitation hole, another end of the elastic member is abutted against a side wall of the receiving room; the concave-convex structure is in a stepped configuration; the first member includes a first space and a first board, the first board includes the connection hole, the second member includes a second space and a second board, the second board includes the through hole, the first board and the second board are stacked, the first space receives the second board, and the second space receives the first board; the number of the plurality of positioning slots is equal to or less than 72; as viewed along the axis, the gap is triangular; the first member further includes a grip portion, the second member further includes a driving portion; the concave-convex structure is disposed at a rear end portion of the control member; the second end portion of the shaft is disposed through the through hole along the axis, a receiving groove is disposed on the outer circumferential wall of the second end portion, a retainer is engaged within the receiving groove, the retainer partially projects beyond the receiving groove and is blocked axially with the second member so that the shaft is rotatably connected to the second member.