Electric toothbrush head and assembly method therefor

An electric toothbrush head, comprising:

• a housing, defined with a mounting chamber and an accommodating chamber, wherein the accommodating chamber is connected to the mounting chamber;
• a brush head assembly, comprising a bracket and a bristle planting head, wherein the bracket is fixedly disposed inside the mounting chamber, the bracket is defined with a matching hole, the bristle planting head comprises a rotary connecting part, a limiting part and a linkage shaft, the rotary connecting part is rotatably matched with the matching hole, the limiting part is connected to the rotary connecting part, and the linkage shaft is disposed on the limiting part and eccentrically disposed relative to the rotary connecting part;
• a driving assembly, comprising a push rod and an elastic piece, wherein the push rod is movably disposed inside the accommodating chamber, an end of the push rod is rotatably connected to the linkage shaft, another end of the push rod is configured to match with an external main shaft, and the elastic piece is disposed inside the mounting chamber and configured to drive the push rod to move facing away from the linkage shaft;
• and
• wherein the bristle planting head comprises a bristle planting disc, and the bristle planting disc is connected to an end of the rotary connecting part facing away from the limiting part;
• the bracket comprises a matching part, the matching hole is defined in the matching part, the matching part is disposed between the bristle planting disc and the limiting part, and a cross-sectional area of the limiting part is larger than that of the matching hole.