Are there any science and technology inventions for middle school students? 50

It's better to say invention than to make.

A small fan, just a small motor, two size 5 batteries, some short wires, a solid plastic foam, a pair of scissors, some pieces of cardboard!

First of all, hollow out the solid foam, connect the small motor with a wire, stuff it into the foam (to keep the rotor shaft of the small motor leaking foam), connect the wire to the battery, also stuff it into the foam, cut the small piece of paper into rows with scissors, and put it on the rotor shaft of the small motor!

Sprinkler bottles. Just take a jar and poke a few holes in the tail.

Take an empty egg shell and coat it with wax (be thin).

Paint on it with a pointed object (to carve through the wax).

Put it in vinegar for a few hours, take it out and get rid of the wax.

The color of the carved place is darkened with acetate.

It's a small production!

Now the popular drying rack, generally do not have a windproof function, users often encounter such annoyance: a piece of clothing that has just been washed, hung on a rope to dry, when the wind blows, it falls to the ground, and it has to be washed again. I invented a self-locking windbreaker hook that can relieve everyone's worries.

The above picture is the schematic diagram of the self-locking windproof hanger: In the above figure, (1) is the lock sleeve and (2) is the lock post, which forms a lever with the crank (4) through the rotating shaft (3), and the lever rotates with (3) as the fulcrum under the action of the counterweight (5). When drying clothes, only need to hold up the crank (4) by hand or hook, under the action of gravity, the lock sleeve (1) and the lock post (2) are automatically separated, the user can hang the clothes hook to the rope smoothly, and then release the crank, under the effect of the counterweight (5), the lock post (2) is automatically combined with the lock sleeve (1) to complete the self-locking process, and the hook (6) forms a lock, no matter how the wind blows, it will not fall automatically.

The process of taking the hanger is also very simple: just lift the crank (4) up with your hand or hook, the lock will open automatically, and the user will easily remove the hanger. The self-locking windproof hanger can not only be hung on a rope by hand to dry clothes, but if you want to hang clothes to a higher place to dry, the user does not need to climb high, just use the hanging hook to support the crank, you can easily hang or remove clothes.

At the same time, the hanger also has the characteristics of simple production, good reliability and low cost. This little invention of mine has obtained a national invention patent.

The lid of this carton is usually covered, which can prevent dirt and dust from entering. When you want to take the paper in the box, as long as you lift the lid, the paper in the box will be automatically lifted as the lid is lifted, which is very convenient to use. When it is finished, it is back in place as soon as it is covered.

This automatic carton is best suited for toilet toilet sheets. The size of the carton can be designed according to your own needs. Provided by the Teaching Resource Library.

I am anxious for how to make a life invention.

A small invention in daily life Set of socks After each laundry, it is often a hassle to pick out pairs of socks to hang up. Although it is possible to fix the pair of socks with a buckle before washing, this method tends to deform the washed socks and makes them uncomfortable to wear, and it is not suitable for women's nylon stockings. Set of socks.

How to make a small invention.

This is not a real invention, the so-called small invention is just a simplification of some everyday objects by one's own peculiar ideas.

Help think of a gizmo.

A small invention in daily life Set of socks After each laundry, it is often a hassle to pick out pairs of socks to hang up. Although it can be washed before using a buckle will become. Jiangnan Times (2004-07-23 32nd Edition) Environmental protection double-layer plastic bag Realization method:

The realization of environmentally friendly double-layer plastic bags is very simple, as long as.

How to make thrifty inventions!

Wrap the cap of the beer bottle in rags and sew it together in the shape you want, which can be made into a glove box or a coaster; The unused straws can be worn as curtains and partitions according to your requirements; Use boxes for large appliances such as refrigerators and TVs to make simple furniture such as bookcases, bedside tables, CD racks, etc. As long as you are a caring person in life, pay attention to ,.. everywhere

Make gizmos who knows.

Come on, come on, let's teach you something that works. The easiest: make a pen holder!!

Do you have any glasses at home that you don't use? Or drop the teacup or something, try it, as long as it's heavy enough to hold the pen. Find a nice piece of cloth, or colored paper, and make a dress for the cup.

Kraft paper is also very good, wrap it on the cup and measure it, cut out a suitable piece, and have more joints.

Please explain how to make a gizmo!

Glue one side of the first sheet of paper to the side of the second, then the third, and then the fourth. Glue them together until they form a ball with a diameter of about 60 centimeters.

Technological gizmos.

The easiest: make a pen holder!! Do you have any glasses at home that you don't use?

Or drop the teacup or something, try it, as long as it's heavy enough to hold the pen. Find a nice piece of cloth, or colored paper, and make a dress for the cup. Kraft paper is also very good, wrap it on the cup and measure it, cut out a suitable piece, and leave an extra centimeter or so at the joint.

Find some glue ,..

Gizmo proposed.

I'll tell you an easy way to put paper on both sides of the inside of the *** box, write your class schedule on the left and your motto on the right. Such a small production is done. The above methods are for reference only!!

Every year, there are projects such as science and technology innovation competitions in various provinces and cities, and you can learn about them.