Springs produced by spring machines are widely used in daily necessities, and they provide these products with the necessary functions and convenience. Here are some examples of springs used in daily necessities:

1. Furniture: In furniture such as chairs, sofas, and beds, springs are used to provide support and comfort.

2. Doors and windows: Springs are used in the hinges of doors and windows to ensure smooth opening and closing of doors and windows.

3. Pens: In ballpoint pens and fountain pens, springs are used to control the extension and pressure of the pen tip.

4. Toys: Many toys, such as bouncing balls, toy cars, and dolls, use springs to provide power and movement.

5. Watches: Springs are used in watch straps and in the internal mechanisms of some mechanical watches to keep the watches running.

6. Glasses: Springs are used in the hinges and nose pads of glasses to adapt to different users' face shapes and provide comfort.

7. Backpacks and handbags: Springs are used in the buckles and zipper pulls of bags to ensure easy opening and closing and durability of the bags.

8. Household appliances: In household appliances such as coffee machines, microwave ovens, and washing machines, springs are used to control switches and door retention.

9. Sports equipment: In sports equipment such as treadmills, bicycles, and fitness equipment, springs are used to absorb shock and provide stability.

10. Musical instruments: In some musical instruments, such as the tuning knobs of a guitar and the internal mechanisms of a piano, springs are used to maintain the stability of the tone.

11. Footwear: In sports shoes, springs or spring-like elements are used to provide shock absorption and increase comfort.

12. Clothing: In some types of clothing, such as bras and sportswear, springs are used to provide support and shape retention.

13. Tools: In some hand tools, such as screwdrivers and pliers, springs are used to provide force and maintain the stability of the tool.

14. Locks: In locks, springs are used to control the rotation of the lock cylinder and the extension and retraction of the lock tongue.

15. Car seats: Springs in car seats are used to provide riding comfort and support.

These are just some examples of how springs are used in everyday items. Springs are used in almost every corner of our lives.