Button assembly

A button assembly, comprising:

• a first-button assembly, comprising a first button, and a first-mounting frame defining a void therein with edges of the first-mounting frame surrounding the first button therein, the first-mounting frame comprising a plurality of latching poles projecting therefrom, the first-button assembly further comprising a plurality of first-supporting arms extending from the first-mounting frame and connecting with the first button for holding the first button in the void;
• a second-button assembly, the second-button assembly comprising a second-mounting frame defining a void therein, the second-mounting frame comprising a plurality of latching holes to cooperate with the latching poles for fixing the first-button assembly with the second-button assembly, the second-button assembly further comprising a plurality of second buttons extending from the second-mounting frame into the void of the second frame;
• wherein the first-button assembly is attached to a back of the second-button assembly with the first button passing through the void of the second-mounting frame and protruding among the second buttons.