Detailed Design

On Figure 1 we illustrate all the modifications, changes, and additions we want to make to the cart while at the same time we are meeting our objectives and constraints for the project.

Moving The Button: Button will be placed directly to the side of Harper’s head to make it almost effortless to turn the car on and off. Also, it will rotate out of the way to make the seat easily removable. To make this modification on the cart we integrate a PVC joint into the seat structure by adding a PVC pipe. While the PVC pipe then modified by heating and bending the pipe in order to be next/close to Harper’s head.

Adding A Basket/Hook: A hook will be added to the lower side of the PVC backrest to ensure the tubing is out of the way, secure, and out of Harper’s reach. This loop will also be closed to ensure the tubing stays put and will not bounce out. The basket attachment will be mounted to the PVC connection point on the back of the cart but the basket itself will be removable. Our client says it is not in the way and how far the basket sticks out is perfectly acceptable. While he showed some concern of the basket at one point detaching and having the item backpack fall. Another hook was added to one of the middle PVC pipes to secure the backpack.

Adding the Seat/Harness: The seat will be set on top of the flat cover that protects the battery compartment. It has buckles that are already installed that wrap around the back of the PVC tower allowing for it to be extremely adjustable while staying sturdy and also is very easy to remove completely.

Moving the Kill Switch: Mount in an easy access spot with the wiring hidden within the tubing to prevent it from being disconnected or damaged.

Adding a Cause/Effect Toy: Mounted to the front of the car using the same button as the on and off button for the movement of the car. Will be removable to change batteries or swap to a different toy.

The following Figure 2 shows all the modifications changes and additions we have done to the cart to meet all the objectives and constraints we set for the project.