It will take a lot of time to take your umbrella out of your bag when it suddenly rains,so by the time you take your umbrella out, you have already been wet in the rain.Also,it is very inconvenient with one hand holding an umbrella,which will definitely constrict your movement.Moreover, it is dangerous to ride bicycles while lifting an umbrella and holding the bike at the same time.In a nutshell, designing an umbrella installed in a bag which can automatically open and close is a necessity.

The bag with an automatically folded umbrella enables you to liberate your hands to do other things and prevent your muscle from feeling sour due to the long-lasting lift of the umbrella.With just a easy move---click the bottom,you can prevent yourself from rain at short notice because the umbrella will unfold itself to cover you and your bag,and another click, the umbrella can fold itself automatically into the bag.Also the umbrella is made of water-proof material,so feel no worry your bag will get wet when the umbrella is returned to it.

(1).The bag with an automatically folded umbrella has the function to fold itself.This is very important because it is the core function of our design.The ideal fold rate is 30 percent.

(2).The design can survive the wind.It is important because this is the basic demand of an umbrella.The ideal firmness is the umbrella can survive the wind at the speed of 12m/s.

(3).The design can prevent the bag from getting wet.It is important.The ideal wet rate of the bag is only 10 percent of the bag is wet.

(4).It can go up and down smoothly.It is relatively important because it determines the time the umbrella can cover you.The ideal time is 5 seconds.

(5).It have a long-lasting battery.It is a considering factor because it is awkward if the battery is dead when needed.The ideal lasting time is 10 hours.

(6).The umbrella can fully cover the person and the bag inside.It is important because it is the basic function of the design.The ideal measure of area is 1.5 square meters.

(7).It can be separated from the bag.It is less important because it is not our main function.

(8).It is light.It is less important.The ideal price is 3 kg.

(9).It is cheap.It is less important.The ideal price is 500 yuan.

(10).It can fold automatically.It is relatively important because it is one of our functions.

(11).It have appealing outlook.It is a considering factor.

(12).It is water proof.It is important because it is the main function of our design.The ideal wet rate of the umbrella after using is 10 percent.

First of all, we did market research and user demand analysis. And the QFD diagram is used to convert the requirements into visual data for our later design and manufacturing. After that, we designed three kinds of products and carried out horizontal comparative analysis according to the research. Finally, we will determine one as the original model of our product. According to the original model, we have carried out solidworks modeling and engineering drawing, which is the first generation product.On the basis of the first generation products, we carried out a series of simulations and determined the final product model. According to the final product model, we purchased raw materials and described the assembly process in detail. After completing these tasks, we conducted simulation tests on the product and found that the product met the user's needs. Finally, we evaluate the products and give reasonable suggestions.