Taking the mechanism design of several typical small household appliances as an example

such as the semi-automatic coffee machine

the cookie machine

the mode of innovative thinking of the mechanism design in the small household appliances is refined

including series combination mechanism

parallel combination mechanism

parallel design of the mechanism.And the explanation of the improvements of the relevant part structure is carried out.Geometric programming design and practice analysis of the most widely using gear transmission are presented

by duality principle

the complicated nonlinear programming is transformed into the simple linear programming

iterative computations are avoided

and the optimal parameters are gotten.