Connecting device and robotic tool

A robotic tool, comprising a body (1) and an upper cover (2), wherein

• the robotic tool further comprises a connecting device (3), the connecting device (3) comprising
• a connecting seat, and
• a connecting rod (30), a top of the connecting rod (30) being provided with a connecting head (300);
• wherein
• the connecting seat comprises a locking component (32), the locking component (32) is provided with a column (324), a plurality of elastic connecting walls (323) located in the column (324), there are gaps between adjacent elastic connecting walls (323), so that the elastic connecting walls (323) have elasticity and are capable of deforming outwardly, an annular cavity (320) located between the column (324) and the plurality of elastic connecting walls (323), an inner wall of the column (324) is provided with an internal thread (321), the plurality of elastic connecting walls (323) jointly defines a sunken cavity (322) to house the connecting head;
• when the locking component (32) is in a release position, the elastic connecting walls (323) is outwardly deformable to allow the connecting head (300) to be removed from the sunken cavity (322);
• when the locking component (32) is in a locking position, the elastic connecting wall (323) is capable of being slightly expanded and deformed outward but insufficient to enable the connecting head (300) to be removed from the sunken cavity (322), so the elastic connecting walls (323) are restricted from deforming outwards to keep the connecting head (300) in the sunken cavity (322) and in the locking position the connecting head (300) is movably arranged in the connecting seat to allow the connecting seat to be displaced relative to connecting rod (30) in all directions which is detectable by a collision detection component;
• wherein, the connecting head (300) is spherical, and the sunken cavity (322) is a spherical cavity, the plurality elastic connecting (323) walls is in a surface contact with the connecting head (300);
• wherein the connecting seat is fixed on the upper cover, the locking component is exposed from the upper cover, and the connecting rod (30) is fixed on the body;
• wherein, the connecting seat comprises a bottom plate (33), the bottom plate (33) is provided with a protruding column (331) and an adjustment cavity (333), the adjustment cavity (333) is defined in the protruding column (331), an external thread (332) coupled with the internal thread (321) is arranged on an outer surface of the protruding column (331), the external thread (332) of the protruding column extends into the annular cavity (320) and is connected with the internal thread (321) of the column (324), so that the locking component (32) moves up and down relative to the bottom plate (33) when the locking component (32) rotates;
• wherein, there is a gap between an inner wall surface of the adjustment cavity (333) and an outside surface of the elastic connecting wall (323) which allows the elastic connecting walls (323) to deform outwards so as to enable the connecting head (300) to be separated from the sunken cavity (322).