Let’s all use our brains to think of creative little inventions.

Egg picker

My family is a professional duck farmer, and my grandfather picks up hundreds of duck eggs every day by the p

Let’s all use our brains to think of creative little inventions.

Egg picker

My family is a professional duck farmer, and my grandfather picks up hundreds of duck eggs every day by the pond. Squat down and stand up

Come... ...My grandfather was so tired that his back and legs ached. In order to reduce his workload, I designed an egg picker after many experiments.

Grandpa can pick up the eggs and put them into the basket without having to bend down.

Find a bamboo tube about 25 centimeters long and slightly larger in diameter than a duck egg. One end is sealed with a bamboo knot, and the other end is sawn into a bevel. Follow the bamboo tube Round the end face, saw off the lower 1/4. Then install a wooden handle on the side of the bamboo tube.

The production is completed.

When using, lay the bamboo tube flat On the ground, with the diagonal opening facing the duck eggs, pick the eggs into the tube. You can pick up five eggs at a time and put them into the basket.

Peng Caiyan

Automatically Chicken feeder

While helping my mother feed the chicks, I discovered that adding feed to the chickens is also a skill: if you add too much, the chickens will not be able to finish eating, and the chickens will rise up and mess around. Scratching and scratching wastes feed; if you add too little, the chickens will starve. It would be great if there was a trough that automatically added food

It would automatically add as much food as you eat, and no more food would be added when you are full.< /p>

Based on this idea, I designed an automatic chicken feeder (as shown in the picture): the feed is placed in a rectangular box above

The bottom of the box and the trough are bent by a piece of iron There is a gap between the bottom of the feed box and the front side plate that can just

leak the food. When the chickens peck at food, the trough vibrates, and the feed continues to fall from the gap, replenishing

The feed in the trough. Stop pecking and the feed will not leak down.

Zhu Deluo

Automatic water feeder

This kind The water feeder has a simple structure and is very convenient for poultry and livestock to drink water.

As shown in the picture on the right, nail a column next to the sink, and nail two bottle clips made of bent lead wires to the column.

First pour some water into the sink, then fill the bottle with water, block the mouth of the bottle with your fingers, turn the bottle upside down and place it on the clamp

so that the mouth of the bottle is right next to the slot Release your finger, the water in the bottle will not flow out, this is the atmospheric pressure at work. When the chicken goes to drink water, when the water level in the tank drops to the point that it is away from the mouth of the bottle, the air

The water will enter the water bottle through the bottle mouth, and the water will flow into the trough. When the water surface in the trough is flush with the bottle mouth,

the water will stop flowing. This It is a water feeder that can automatically add water.

If you want to give water to livestock, you can make a large water feeder like the picture on the left. But you should pay attention to:

, the bucket lid behind the wall must be tightly closed, and there should be no air leakage.

Wang Jun

Automatic siphon

The most convenient way to change the water in the fish tank It uses a siphon to suck out the old water and then inject new water. In the past, to fill the siphon, you had to suck it through your mouth or add a piston inside the siphon. Both methods were inconvenient.

So, I designed an automatic siphon.

The automatic siphon is as shown in the picture. At the lower end of a section of latex tube (or plastic tube), install a plastic tube

A screen cover modified from a medicine bottle, with an air bag modified from a rubber ball installed on the upper end of the tube. There are two holes in the rubber ball.

One hole contains the valve tube from the bicycle inner tube, and then the latex tube is placed on the valve tube on; the other hole is used to make a water hole.

When using it, first block the water outlet hole with your fingers, pinch the rubber ball, and immerse the end of the screen cover in the water.

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Slowly relax the rubber ball, and when the water fills the latex tube, droop one end of the water outlet hole, and the water will flow out automatically.

Li Chen

Magnetic grass mixing Stick

In the past, a cow in the production team died of illness, and a lot of iron things were taken out from its stomach. After the responsibility system was implemented,

my family fed a cow. Every time the cow was fed, Dad has to sift carefully to pick out the iron nails, iron wires, and iron filings in the forage.

Eating iron things by mistake is so harmful, how can we get rid of them? Quickly pick it up. I installed a magnet on the reed speaker at the lower end of the grass mixing stick

, and while mixing the grass, it attracted all the iron objects in the grass

.I named it Magnetic Grass Mixing Stick.

Yang Jianan

Making cats and dogs afraid of chickens

Several families in our team have raised it Cats and dogs. When they see chickens, they catch them and eat them.

In 1981,

a family bought more than 300 chickens, but within 20 days, all of them were eaten by dogs and cats. I also have chickens at home,

and I also have a cat. and dogs. Cats and dogs don’t eat chicks and are a little afraid of them. Why is this?

At first, when my mother bought the chicks, she didn’t dare to put them on the ground. Instead, she put them in a basket and hung them. On a high hook. When I was in school, I saw a swarm of bees and thought: People are bigger than bees, but they are afraid of bees, just because they are afraid of getting stung. Don't we think of a way to scare dogs and cats so that they are afraid of chickens?

I grabbed a chicken with my right hand, let the chicken head stick out from the tiger's mouth, and pinched it with my thumb and index finger. A needle,

the needle tip is a little longer than the chicken's mouth. Then catch the cat and dog, and use the needle hidden under the chicken head to prick the cat and dog's mouths and noses

, pricked it more than a dozen times, for three or four days in a row. Ha! It’s really effective! Cats and dogs are frightened when they see the chicks. Not only do they not dare to pounce on the chicks, they also give way to the chicks. Cats When the dog and the cat were eating, the chicken rushed to eat.

As soon as the cat and dog saw the chicken coming to the bowl, they ran away.

Zang Ronghua

Flip-over mouse trap

After many experiments, I designed a good way to catch mice.

Find a deeper water tank (a bucket is also acceptable) .Use plywood or other thin plates and cut them into discs whose diameter

is about 5 mm smaller than the inner diameter of the water tank. Fix a thin piece longer than the outer diameter of the water tank on the center line of the disc

Rod, used as a flap. The lighter the material of the flap, the better.

After the flap is completed, place the two ends of the thin rod on the mouth of the cylinder, and one side of the flap also on the mouth of the cylinder. , make the board surface

parallel to the cylinder mouth so that the flap can flip freely at the cylinder mouth.

When using, put a little water in the water tank; the flap does not rest on the cylinder There is a small amount of rat's favorite food fixed on the side of the mouth. As long as the gluttonous rat steps on the flap, it will not escape the fate of drowning.

Zhang Tiexiang

Sand sink

Our school pumps water, but after pumping for a while, the water stops flowing. Our science and technology team took the water pump apart and took a look. It turned out that the well The sand brought up by the water accumulated in the water pump, blocking the impeller.

In order to prevent sand from flowing into the water pump, we installed a gauze cover in front of the impeller. Unexpectedly, it took a while

< p>After watering, the water stopped flowing. It turned out that the sand blocked the pipe in front of the gauze cover.

Finally, we installed a vertical downward pipe in front of the gauze cover, with a cap on the lower end of the pipe. Sealing,

made this sand sink. After the sand pumped up with the water was blocked by the gauze cover, it automatically entered the lower pipe

. In this way, the water pump finally worked normally.

Cui Chenghua

Water truck

Can you lift a large bucket of water

I can! Find six strong wooden sticks and Use two axle wheels (other wheels are also acceptable) and install a water truck as shown in the figure. Hang an iron hook on the head of the car. When lifting water, hang the bucket on the hook and use Just push the cart by hand

This kind of cart can also be used to transport coal or other things without any effort.

The water truck uses the principle of leverage.

Guo Hao

Water level alarm

Dad is taking care of the water pump in the nursery. The pump room is down the slope, and the pool is on the high slope, far away

In the computer room, I couldn’t see whether the water in the pool was full, so I often had to run to the pool to check.

In order to avoid running back and forth, I helped my father design a water level monitor. .

As shown in the picture, fix the square wooden board with the contact piece on the edge of the pool, and fix the wooden board with the bell, power supply and electric switch in the machine room. When pumping water , close the blade, pump the water to a certain level, the contacts on the wire rise with the buoyancy of the float, and connect with the fixed contacts, the circuit is connected, and the bell in the machine room rings. ,

You will know that the water in the pool is full.

When the water is not pumped, open the gate knife.

Zhong Yongping

Rice field irrigation water level controller

In order to achieve a bumper rice harvest, water managers often have to irrigate the rice fields according to the conditions of the paddy fields. We designed this automatic water level control device based on the buoyancy and lever principles

.install it at the rice border gate

position

, just open the gate and adjust the float according to the required water level, and then you can safely release water. When

the water level reaches the required level, it will automatically close the gate and stop watering. .

The device is as shown in the picture. Use the pull rope to open the gate, then lift the brake lever and pin the stopcock, and you can

fill water. If the water level reaches the predetermined height, Lift the pontoon, press the brake lever downward with the lever, and release the latch. The gate will be pulled down by the elastic band and the water inlet will be closed.

Fengxin County, Jiangxi Province Urban Primary School Science and Technology Group

The Unsinkable Bucket

There is a well at the door of my hometown in the countryside. When fetching water, people often drop buckets into the well.

It took a lot of effort to fish it out. I thought, I thought, I got it! I can make a double-bottomed bucket.

There is a space between the double bottoms so that It does not allow water to enter. If such a bucket is dropped in a well, it will float on the water, and it is very convenient to fish it out. The size of the double-bottom space should make the weight of the water in the bucket greater than that of the iron bucket itself. Weight

Quantity.

Zhang Xiaoge

Water bucket with valve

When drawing well water, swing the well rope to make the bucket fall over Come here. Sometimes the bucket won't fall after swinging for a long time, which is really annoying.

I thought of a way to make a hole larger than an egg in the bottom of the bucket. The hole is covered with a piece of thicker rubber, and one side of the rubber is fixed with nails. In this way, the water bucket is placed in the well, and water pours into the bucket from the hole. The bucket is full of water. When you lift it up, the pressure of the water pushes the rubber down and covers the hole, just like

A valve is installed at the bottom of the bucket.

This kind of bucket is specially used for lifting water. Save time and effort.

Shen Wenhua

Look for buckets with magnets

If the bucket falls in a deep well, it is difficult to salvage it.

If the bucket is For iron, you can tie a magnet with a rope and lower it into the well. After rotating it a few times, it will

touch the iron bucket and then be attracted to the bucket. According to the position indicated by the magnet, lower the fishing hook. , you can

greatly narrow the scope of the search and easily fish out the bucket.

Zheng Atao

Insurance winch

Use The windlass shakes the water, and if you let go, the handle of the windlass will easily injure your arm.

I installed anti-reversal teeth on the windlass as shown in the picture, so that it will not reverse. When placing the water bucket, just hold < /p>

Just move the tripod up.

Tian Yongli

Windmill winding

My mother does handwork at home and often has to wind the wire. .It is not easy to wind a large shaft of "pagoda wire" onto a wooden shaft.

I saw that the front and rear doors of the room were opened, and the draft was very strong, and I also saw "China

p>

Youth Daily introduced a small wind-powered production, so I made a winding machine that uses draft wind.

Please see the picture for how to do it.

Wu Xiangshu

Plastic gluer

If the plastic bag or plastic film is broken, you can repair it yourself. I melt the plastic according to the heat

and apply pressure to glue it. According to the principle, it is designed as a simple adhesive soldering iron. The use effect is better.

Take a copper coin (or a small round iron piece) and drill a small hole in the center of the circle. Find a piece of metal pipe (length from < /p>

Determine), make a groove at one end according to the radius of the copper coin, and drill a pair of small holes at the end of the groove. Put the copper coin into the groove,

align the center hole with the small hole, and use iron wire to Make a shaft, pass through the small hole, and fix the copper coin on the groove end of the metal pipe. Note

The copper coin must be able to roll freely in the groove. Put a section of plastic pipe or bamboo pipe on the other end of the metal pipe as < /p>

Handle.

When gluing, first place the plastic film to be repaired on the table, place a piece of cellophane on top, and heat the

adhesive device When the temperature reaches about 100 degrees Celsius, roll it over the cellophane paper with appropriate pressure. When the temperature is high, the rolling speed should be faster and the pressure can be smaller; when the temperature is low, the rolling speed should be slower and the pressure should be larger.< /p>

Zhu Qingyang

Light-condensing screen

The lights at home are dim, and reading and doing homework at night can easily damage your eyes. I designed a condensing screen,< /p>

It can increase the brightness of the reading area.

Take three thin wooden boards of appropriate size (cardboard is also acceptable), and use

The hinges are connected, and one side is covered with tin foil for wrapping cigarettes. When reading at night, pull it open and stand it on the table. The light is reflected by the tin foil, so that it can be concentrated

In the place where books are placed.

Using three mirrors as above to surround them can also focus light.

Zheng Chen

Double-use crutches< /p>

I have a problem with one of my legs, so I have to use crutches to walk. But I am very tired when waiting for the bus and standing in line.

I think other disabled people may also have this difficulty. Why? It would be nice if we could bring a folding chair with us without increasing our burden. So, I pondered on my crutches.

After repeated consideration, I drew a picture , experimented, and finally designed a lightweight and practical dual-purpose crutch (as shown in the picture).

Add a seat plate in the middle of the crutch, the upper part is connected to the double pillars of the crutch with a hinge, and the lower part is connected to the crutch with a hinge.

The single column of the crutch is connected. When stacked, it becomes a single crutch, and when set up, it becomes a folding chair.

Cao Wanyu

Three-legged multi-purpose ladder< /p>

This ladder has only three legs, but it can be used as a double ladder, a single ladder and a trolley.

The three legs are separated and hung with the hook below, just like a four-legged ladder. The same, it becomes a double ladder. Flip the third leg

along the hinge in the middle and insert the latch to fix it. Then you can connect the two sections of the ladder to form two legs

Single ladder. Pull out the shaft of the middle hinge, remove the third leg, and the remaining two-legged ladder becomes a small trolley. This design saves materials and has many uses. It fully utilizes the potential of a tool.

Zhang Zhongzhong

Simple microscope

I designed a simple microscope using all waste products. Find an empty toothpaste shell, cut off the part above the neck, and wash it. Cut a small piece of transparent tape and stick it on the mouth of the toothpaste shell. It is the carrier. Taiwan.

Find an awl to drill a small hole in the center of the top of the toothpaste shell. Gently smash a waste small electric bead, and take out the light-condensing glass ball on the head.

, insert it into the small hole to become an eyepiece. Place the specimen to be observed

(such as spider legs) on the stage, cover the toothpaste shell, and rotate the cover (that is, adjust the focus) ),

Until the object image can be clearly seen.

Chen Ping

Flashlight microscope

Cut one out of cardboard or card A disc of the same size as the flashlight glass, with a condenser in the center

The glass ball in the electric bead is used as a lens. As shown in the picture, place the object to be observed in the center of the flashlight glass.

< p>Put a small spring on the glass piece, put the round piece of paper with the lens on it, and put it on the head of the flashlight

The microscope is ready.

Twist You can adjust the distance between the lens and the object by turning the screw ring on the flashlight head. The flashlight light can

be used for lighting.

李伟贤

Dual-purpose backing plate

When doing homework, I often can’t find a ruler. I thought of a way to borrow a ruler from my classmates, and

draw on the pad according to the scales on the ruler. Mark the numbers. Ha! I have a dual-purpose pad. Students

please give it a try!

Guo Yuefeng

Dual-purpose rubber Erasing

When doing homework, if you write a wrong word or answer a question incorrectly, you have to use an eraser. After erasing, there will always be left some eraser residue and paper wool.

, I have to put down the pen and pat them away with my hands, which is quite annoying.

"It would be great if I had a brush." ??Yes! You can make a dual-purpose eraser by yourself and use the waste brush tip

Tear it down, clean it, and stick it to one end of the eraser. Use one end to erase characters and the other end to sweep away eraser residue and paper fluff. How nice

Yeah.

Chen Xiaoyu

Paper clips

Teachers often print out some handouts and review materials, which are scattered and scattered. They are not only easy to lose and tear,

but also make the school bag messy.

Later, I made two kinds of paper clips. One was to cut two thin pieces of wood or bamboo, slot them in the middle and drill two holes. Between the wood (bamboo) pieces, align the holes on the wood pieces and drill holes on the paper, and tie elastic bands or strings through the holes (picture on the right)

).

The other is to use iron wire to bend a frame, reinforce it with iron sheets at both ends, and install elastic bands and snap buttons. When used

when using it, paper is sandwiched in the middle and the buttons are put on clasp, it becomes a very good handout folder (pictured on the left).

Yang Dongqun

"Bookfold"

I bought a new book. I spread it on the table and read it. As I looked, the book closed automatically. I used an ink bottle to press the open pages. After a while, the ink bottle slipped down again.

I found four or five rubber bands and tied them into a long strip, about one and a half times the height of the book. I then used wire to bend a small hook

and used it to cover the spread. The open book will never close automatically.

After the book is closed, I also know which page I have read.

Su Shanglai

< p>A good way to hang charts on the blackboard

When I was in class, I saw that some teachers found it very difficult and laborious to hang charts. So I made a simple chart flipper on the blackboard

Find two spools, one fixed on the upper right corner of the blackboard and one fixed on the top of the blackboard. On the right side of the blackboard

, nail two nails, one high and one low ( The position is customized), the lower nail is the first hanging point, and the upper nail is the second hanging point.

Take a thin rope (or strong thread) about 2 meters long ), tie a small iron hook to one end, and tie a wooden bar about 18 cm long, 5 cm wide, and 0.5 cm thick to the other end. The thread should be tied in the middle of the wooden bar.

p>

Fix a clamp at an equal distance on both sides of the wooden bar.

When using it, wrap the string around the two spools. The iron hook is first hung on the second hanging point to make the strap With clips

Lower the wooden bar and clip the picture to be hung. Then, hang the iron hook at the first hanging point. The students can see clearly

Here comes the picture hanging on the blackboard.

Xu Hai Wang Xiang

The line ruler on the blackboard

I am the scribe of the school blackboard newspaper. Every time I publish On the blackboard, the most troublesome thing is drawing lines and making grids.

I figured out a simple way to draw lines.

Nail four small letters on the wall at the four corners of the blackboard. Nail, take thin wire (or thicker wire) and wrap it around the nail

Enclose a rectangle, use a few white wires to connect the wires up and down, left and right (as shown in the picture). Copied horizontally

When copying vertically, move the connections on the left and right wires up and down; when copying vertically, move the connections on the upper and lower wires

to the left and right. If the lines around the blackboard (or on the wire ), symmetrically lighten the landmarks

It would be better if the length is increased (do not affect the appearance).

After copying the blackboard newspaper, move the lines upward (or downward) and towards Move left (or right) to the end,

for future use.

Healthy

Simple ruler

Primary school students cannot write without checking. However, checking is very troublesome and often uneven. If you check squares, it will be even more troublesome.

The simple ruling ruler I designed As shown in the picture. Once the ruler is set up, many lines can be drawn quickly and evenly.

It can also draw squares, rectangles, and squares, which is very convenient to use. Letter grid arrangement< /p>

When I saw my sister doing English exercises, she had to type the letter grid by herself. She used a ruler to compare and draw four horizontal lines to form a row of letters. I thought about it for my sister. I found a way: I found four ballpoint pen refills,

wrap each one with tape, line them up, and line them with a flat piece of bamboo or iron, and wrap them

Apply three or four layers of tape to make a convenient arranging pen. Use the arranging pen to type letters, which is fast and accurate. When using it,

change the angle of holding the arranging pen and adjust it. The width of the grid.

Wide the distance between the pens to draw horizontal grids and squares; use a pen arrangement with five refills to draw five lines

Level grid.

p>

Teng Xiaonan

Homemade compass

Find two used ballpoint pen refills (one of which can be used for writing), three broken saw blades, and one broken saw blade

With a sewing machine needle, you can make a small compass yourself.

Put three broken saw blades on the grinding wheel and grind them into the shape shown on the left. Take a ballpoint pen refill that cannot write,

Put it on a low fire for a while, then pull off the copper head and insert the big end of the sewing machine needle.

Make it fixed. Insert the two long hacksaw blades into the ends of the two ballpoint pen refills as shown on the right. Finally, use screws to fix the round holes of the three saw blades

together. Don't fix it too tightly. It's better to be able to move it flexibly without loosening it.

Put the short saw blade on top to make a handle, and the two longer saw blades are the two legs of the compass.< /p>

Fan Jianjiang

Homemade "ellipse compass"

Usually when drawing an ellipse, you first drive a nail at each of the two focal points of the ellipse, and draw a line Wrap the two ends

around the nails and then draw them with strokes, which is very troublesome. I made an oval compass, which is more

convenient to use.

Find Take two waste ballpoint pen refills, poke off the small ball at the tip, and drill a small hole in the lower end of the pen refill.

Take some thin iron sheets and make the "feet" and "" of the oval gauge as shown in the picture. The head" and feet are rolled into a cylindrical shape, with ballpoint pen refills inserted inside. Fix them with screws.

Use a smooth, strong thin wire about 50 cm long, respectively. Pass the ballpoint pen refill through the small hole at the tip of the pen

, and then take it out from the small hole at the lower end of the pen. Find two small clips and clamp them on the legs of the oval gauge respectively. Tie the thread

Wrap your head around the clip.

When drawing an ellipse, first determine the focal points F1 and F2 on the paper, and press the two feet of the elliptical compass on the two focal points

, adjust the length of the thin line according to the size of the ellipse, and tighten the thin line with a pen to draw an ellipse.

If you use a ballpoint pen to draw an ellipse, you can cut off a line to prevent the line from slipping out of the end of the pen. A small piece of ballpoint pen

The core plastic tube is placed on the pen tip.

Chen Dong

Crayons made from colored chalk

There was a power outage. I lit a red candle and did my homework under the candlelight. I accidentally knocked the candle over

and the wax oil spilled on the table. I picked up a piece of chalk and used it to absorb ink, like a piece of chalk. Dip it out

of the wax oil poured on the table.

The next day, I accidentally used this piece of chalk dipped in red wax oil to draw on the paper. , the color is bright

It’s so bright and easier to use than red crayons. I thought: Can I use chalk soaked in wax oil to make crayons? I

Put the candle in the iron bowl Boil it in the water and soak the chalk in wax oil. Let it cool and try it. It is really good. But the wax oil only soaked the surface of the chalk. What should I do? Simply put the chalk in Cook in wax oil at over 60 degrees

over low heat until the chalk no longer bubbles, and the wax is indeed soaked in.

Powder crayons are very easy to use, compared with ordinary crayons. , it has the advantages of bright colors, uniform coating, not easy

breaking, low cost, and convenient production.

Zhang Wenkui

Ink delivery tube

What should you do if you want to pour ink from a large bottle into a small bottle without leaking?

Take a wooden stopper (or rubber stopper) with the same diameter as the mouth of the large bottle. Place it on the stopper Drill two holes and insert two thin plastic tubes (other thin tubes will also work). One of the tubes is shorter and one end is higher than the liquid level. One end is used for blowing air; the other pipe is longer, one end is inserted deeply into the bottom of the ink,

one end is bent over and stretched towards the mouth of the small bottle as the water outlet pipe.

This way , as long as you blow into the blow pipe, the ink will be transported to the small bottle through the water outlet pipe, and not a drop will be wasted

The air blow pipe is preferably thicker than the water outlet pipe, which saves effort and allows the water to flow out easily. Enough.

Zhao Laijun

Made-made small measuring cups and small funnels

When our science and technology team does experiments, we often use small measuring cups and small funnels. If only I had them Small

Measuring cups and small funnels are so good, you can also do small experiments at home.

One day, I saw a plastic medicine bottle with a scale, ah, it has many upper parts Like a small upside-down

funnel!

I used a knife to cut the bottle open, haha, the lower part happened to be a small measuring cup.

I again Find a cork, open an eye in the middle, insert a piece of hard plastic tube, and put the cork on the mouth of the bottle. The small funnel will be more useful.

Chen Xiaowu< /p>

Square funnel

The lower end of the funnel is generally round. Use this funnel to fill water or other liquids into bottles, often

>

Always lift the funnel so that there is a gap between the funnel and the mouth of the bottle. Otherwise, bubbles will pop out

and the liquid will flow very slowly or even not. .

If you change the lower end of the funnel to a square shape (as shown in the picture), when you pour liquid into the bottle, the gas in the bottle

will escape along the gap at the mouth of the bottle. There is no need to Let’s talk about the funnel again.

Fang Li