1. Lift one end of a waste can (such as Lulu beverage can) and tap the concave surface with a round-headed hammer at the other end. Roll up two 1 batteries with thick corrugated cardboard and put them in a can, with the positive pole facing up and the negative pole facing down.
2. Find a suitable plastic cover (for example, the magic big roll box cover can just be buckled on Lulu's beverage can), and dig a small round hole in the center of the box cover, the size is suitable for the light bulb to be inserted tightly. Insert the bulb base into the small hole.
3. Take a section of heat tracing wire, peel off the silk skin at both ends, wrap one end around the lamp holder, and tie a small hole at the other end from the side of the plastic cover. Put the plastic cover on the jar. Check whether the bulb and battery are in close contact. Disposable flashlights will be ready here.
4. When using, press the wire on the upper side wall of the unpainted weld of the can with your thumb, and the flashlight will glow. When your thumb jumps off the wire, the flashlight will go out, which is very convenient to use.
Invention is the process and achievement of using natural laws to solve unique problems in the technical field and put forward innovative schemes and measures. In the field of intellectual property rights, invention is one of the patent types protected by the patent law, which refers to a new technical scheme proposed for a product, method or its improvement.
In order to meet the needs of people's daily life, the invention provides an unprecedented model of artificial natural objects, new processes and methods for processing and manufacturing, as well as innovations and transformations of mechanical equipment, instruments and various consumer goods, related manufacturing processes, production processes and detection control methods.
1888 Darwin gave a definition to science: "Science is to sort out facts, find laws from them and draw conclusions". Darwin's definition points out the connotation of science, that is, facts and laws. Science should discover unknown facts and seek truth from facts on this basis, instead of pure thinking fantasy divorced from reality.
As for the law, it refers to the internal and essential relationship between objective things. Therefore, science is a knowledge system based on practice, tested by practice, and strictly demonstrated by logic about the nature and laws of motion of various things in the objective world.
Invention is the process and achievement of using natural laws to solve unique problems in the technical field and put forward innovative schemes and measures. The product was invented to meet the needs of people's daily life.
Inventions can be divided into useful inventions and useless inventions. The achievements of the invention either provide an unprecedented model of artificial natural objects or provide new technologies and methods for processing and manufacturing. The innovation and transformation of machinery and equipment, instruments and various consumer goods, as well as related manufacturing processes, production processes and detection and control methods, are all inventions.