Lifting mechanism and key structure

The invention relates to a lifting mechanism and a key structure. The lifting mechanism comprises a bottom plate, a key cap and the lifting mechanism, the bottom plate comprises a first bottom wall. The key cap is arranged opposite to the bottom plate and comprises a first cap wall. The lifting mechanism is movably connected between the keycap and the bottom plate, so that the keycap can reciprocate relative to the bottom plate, and the lifting mechanism comprises a first lower shaft part and a first upper shaft part which are movably connected to the same side of the bottom plate and the keycap respectively; when the key cap is in a release state, the first upper shaft portion abuts against the first cap wall, but a reserved gap is formed between the first lower shaft portion and the first bottom wall. When the key structure is in a release state, a reserved gap is formed between the lower shaft part of the lifting mechanism and the bottom wall of the bottom plate. Thus, even if the lower shaft part has abra