The structure of the umbrella is composed of:

1. Umbrella surface: The umbrella surface is the main part of the umbrella, which is usually made of waterproof materials, such as nylon, polyester, etc. The surface of a modern umbrella may also be treated with a special coating to enhance its water and sun protection properties.

2. Umbrella bone: The umbrella bone is the skeleton that supports the umbrella surface, usually made of metal or plastic. The number of umbrella bones and the design of the structure determine the sturdiness and durability of the umbrella.

3. Umbrella handle: The umbrella handle is the holding part of an umbrella and is usually made of plastic, metal, or wood. The design of the handle also reflects the beauty and comfort of the umbrella.

4. Umbrella tip: The umbrella tip is located at the end of the umbrella handle, which is used to protect the umbrella bone and umbrella surface, and at the same time plays a fixed role when the umbrella is closed.

5. Umbrella buckle: The umbrella buckle is used to secure the umbrella surface and umbrella bone to ensure that the umbrella will not accidentally open or close when in use.

 Functions of the umbrella:

1. Rainproof: The most basic function of an umbrella is to protect people from rain when it rains.

2. Sun protection: Many umbrellas also have sun protection, which blocks UV rays and protects the skin from sun damage.

3. Decoration: Umbrellas also have a decorative function, and many umbrellas are beautifully designed and can be used as fashion accessories.

 Use and maintenance of umbrellas:

1. Proper use: When using umbrellas, avoid using them in strong winds to avoid damaging the umbrella bones.

2. Dry in time: The umbrella should be dried after use to avoid damage to the umbrella surface and bone caused by long-term moisture.

3. Regular cleaning: Clean the umbrella regularly to keep the surface clean and prolong the service life.

4. Proper storage: When not in use, umbrellas should be stored in a dry and ventilated place to avoid deformation caused by long-term squeezing.