Seat+belt+by+Sara+C.

=SEAT BELT BY SARA C. = media type="custom" key="23179414"



=** 1) What do you like/dislike about your product? **=  I don't like specially seat belt, but they are important. They have saved a lot of lifes, and without them, travel in cars would be dagerous.   **2) What is moving in your object?**  The mechanism that have the seat belt is the retractor. It has others mechanism, the pendulum and the centrifugal

= 3) How are the moving parts joined together? =  It has gears, lever, cam, pawl and pin  = 3) What movement is produced? =  The elements that moves in my object are the coil the spring and they move in a circular way  media type="youtube" key="NIfzx9fjRF0" width="200" height="147" **4) Why are the moving parts used?** Because, when the car stop abruptly, the person also stop because of the inertia. The belt has to spread that force on the differents parts of the body for not damage.

= 5) How do they work? = __ The mechanism/s in my object works like this: __  The seat belt is conect with the retractor. The mainly element of the retractor os the coil (that it's hoocked with one end of the belt). Inside the retractor, one spring rotate around a coil with a spring.

As I say before, the retractor has another two mechanisms: - By the movement of the car: it locks the coil when the car suddenly decelerates - By the movement of the belt: it locks the coil when someone pulls the belt media type="youtube" key="WWir1JaZ_Ww" width="200" height="147" **6) Curiosities:** media type="custom" key="23182638" **__8.- Picture Gallery __**