The following figure shows a typical mechanical catch common

The following figure shows a typical mechanical catch commonly found in electronic devices You have been requested to analyse and design an appropriate mechanical catch for a television remote controller Part A slides along grooves in the device towards part B Part A flexes as it moves along the bottom horizontal edge of part B before it springs back and hook on part B. Choose and propose a material for Part A. What is the young\'s modulus of this material? If the height of the catch is 2mm. draw the free body diagram of part A when it is sliding along the bottom horizontal edge of part B. Derive the shear force and bending moment equations as a function of the unknown force (F). Draw the shear force and bending moment diagrams Determine the elastic curve of part A and state dearly the boundary conditions for the elastic curve equations Determine the unknown force F if the width of the catch is 6 mm Determine the potential mechanical failures this design (in both part A

Solution

The material that can be used is acrylonitrile butadiene styrene with youngs modulus of 2.0 to 2.6 GPa (0.29 to 0.38 x 106 psi)

Material can be taken off part B. Intsead of having uniform thickness throughout part B can have a curvature to latch onto part A and its thickness can be reduced uniformly throughout.