Multi-functional tool structure

A multi-functional tool structure, comprising:

• a handle, a top part of the handle comprising an annular opening and at least two engaging recesses, each engaging recess recessed equidistantly on an inner surface of the annular opening, each engaging recess comprising a guiding slot and an engaging slot, the guiding slot and the engaging slot recessed on the inner surface of the annular opening, the guiding slot extending downward from a top surface of the annular opening, the engaging slot disposed below the guiding slot, an end of the engaging slot connected to the guiding slot;
• a base, the base comprising multiple stops, multiple slots, and a bottom part, the multiple stops and the multiple slots alternatingly disposed along an outer periphery of the base, and a top end of each stop having a respective first joint, an outer side of one of the stops having an elastic assembly;
• wherein each of the multiple slots is configured for accommodating one of a plurality of tool heads, and the bottom part comprises at least two engaging protrusions and a tool fixing recess, the engaging protrusions configured to engage the engaging recesses on the handle, and the tool fixing recess configured for accepting one of the plurality of tool heads;
• a cover, multiple second joints disposed on a bottom surface of the cover and configured for engaging with the first joints on the base;
• a hollow sleeve comprising a side opening and multiple grooves, the side opening disposed on one side of the sleeve, the multiple grooves disposed on an inner surface of the sleeve, the sleeve disposed on the base and located between the handle and the cover, the elastic assembly abutting the grooves;
• wherein when the sleeve is rotated by an external force, the elastic assembly is deformed in order to switch to one of the corresponding grooves;
• wherein the handle is separable from the base, the side opening is capable of corresponding to the one of the tool heads by rotation of the sleeve, such that the one of the tool heads is accessible from the side opening for fixing to the tool fixing recess on the base.