2. You are to design a button that activates a switch after 0.25cm of spring com

Question

2. You are to design a button that activates a switch after 0.25cm of spring compression. The button is used on a toy designed for use by all children 2-5 year olds. (5 pt) Pushing strength with the thumb or two or more fingers F. #25cm =Fmax Pushing with the thumb (N) ushing down al seal pan heigh No. Mean SD Ran 2-5 2680119 13 60 S1 20 8 2416 830 10.30 36.30 6- 10 ms66 62 3128 36.10 104 10 82 75 35 70 | 3550-142 60 a. What is a risk of using the small selection of data available for design purposes? If the button is designed for frequent use and the above values are valid, what operational force should the button have in Newtons? (show calculation) b. To ensure the button force does not exceed the required operational force, what is the maximum required spring constant, K (N/m)? (show calculation) c. NOTE: Assume button has initial spring preload of 1N.

Explanation / Answer

a )

the risk in the above arrangement is

the force applied here is very less so that the sandard devation will be very high .

this will effect in designing the button, that will not activate..

beacuse spring compression is not avercome by some children ...

b )

F = ( 26.8 + 24.16 ) / 2

= 50.96 / 2

F = 25.48 N

c )

from above F = 25.48 N

and here spring preload is 1 N

F = K X 0.0025 - 1

25.48 = K X 0.0025 - 1

k = 26.48 / 0.0025

K = 10592 N/m

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