Keyboard with buffer structure

A keyboard comprising:

• a base having a bottom wall and an inner periphery wall connected to an outer periphery of the bottom wall to form an accommodation space with the bottom wall;
• a key module disposed in the accommodation space of the base and having a printed circuit board assembly and a plurality of keys connected to the printed circuit board assembly;
• a top cover mounted on the base and having a plurality of hollow areas to expose the keys;
• and
• a buffer unit disposed in the accommodation space of the base and including a cantilever having a support portion connected to a bottom surface of the printed circuit board assembly, an inclined extension arm having a top end connected to the support portion, and a shaft portion connected to a bottom end of the inclined extension arm and spaced from the bottom wall of the base, and a torsion spring sleeved on the shaft portion and having two end portions abutted against the bottom wall of the base and the inner periphery wall of the base, respectively.