Pet care tool

A pet care tool, comprising:

• a work head, and a handle connected to the work head;
• wherein the handle is pivotally connected to the work head by a pivotal connection mechanism, which comprises an angle locking structure that can lock and unlock the connection angle of the work head and the handle in at least two angular positions, wherein the angle locking structure comprises:
• a plurality of linear inner teeth fixed to the work head and spaced apart in the circumferential direction, a plurality of linear outer teeth fixed to the handle and spaced apart in the circumferential direction, a ring gear adapted to the linear inner and linear outer teeth, and a ring gear drive assembly that drives the ring gear to move so as to be selectively in a first position or a second position;
• when the ring gear is in the first position, the linear inner and linear outer teeth simultaneously mesh with the ring gear;
• and when the ring gear is in the second position, the linear inner teeth mesh with the ring gear while the linear outer teeth are separated from the ring gear, and wherein with the handle comprising two spaced work head connection ends, the pivotal connection mechanism comprises:
• two circular grooves disposed in the work head one in the left and one in the right, with their opening directions away from each other;
• the circular grooves are provided on corresponding circular groove walls with the linear inner teeth extending axially, which are spaced apart in the circumferential direction of the circular groove walls;
• two pin shafts respectively coaxially disposed in the two circular grooves, two outer ring gears respectively projecting into the two circular grooves and respectively movably sleeved outside the two pin shafts, the outer ring gears comprising:
• a circular ring body, the linear outer teeth fixed on the periphery of the circular ring body and extending along the axial direction of the circular ring body, and a limit inner flange fixed at an axially outer end of an inner hole of the circular ring body, with the linear outer teeth spaced apart along the outer circumferential direction of the circular ring body;
• two springs respectively sleeved outside the two pin shafts and axially clamped between the limit inner flange and the bottom wall of the circular grooves;
• central holes disposed through the work head connection ends;
• a plurality of side holes disposed through each of the work head connection ends and spaced apart on the periphery of each of the central holes;
• a plurality of limit engaging teeth disposed on opposite sides of the two work head connection ends and spaced apart along the outer circumferential direction of the central holes;
• and two unlocking buttons respectively axially movably connected to the two work head connection ends and comprising a plurality of bosses movably disposed through the side holes.