First, hollow out the solid foam, connect the small motor with wires and stuff it into the foam (to prevent the rotor shaft of the small motor from leaking foam). Connect the wire to the battery, plug it into the foam, cut the small pieces of paper into rows with scissors and put them on the rotor shaft of the small motor!
Sprinkle a water bottle. Take a jar and poke some holes in the tail.
Take an empty eggshell and coat it with wax (thin)
Draw a picture on it with something sharp (cut the wax)
Soak in vinegar for a few hours, and remove the wax.
The carved place was darkened by acetic acid.
Turned into a small production!
Nowadays, popular clothes hangers generally have no windproof function, and users often encounter such troubles: a newly washed dress hangs on a rope to dry, and when the wind blows, it falls to the ground and needs to be washed again. The self-locking windbreaker hook I invented can relieve everyone's troubles. The above picture is a schematic diagram of the self-locking windproof clothes hanger: in the above picture, (1) is a lock sleeve, (2) is a lock column, and a lever is formed by a rotating shaft (3) and a crank (4), and the lever rotates with (3) as a fulcrum under the action of a counterweight (5). When hanging clothes, just lift the crank (4) by hand or hook. Under the action of gravity, the lock sleeve (1) and the lock column (2) are automatically separated. The user can hang the clothes hook on the rope smoothly and then loosen the crank. Under the action of the counterweight (5), the lock post (2) is automatically connected with the lock sleeve (1). The process of taking out the clothes hanger is also very simple: just lift the crank (4) upward by hand or hook, the lock will automatically open, and the user can conveniently take off the clothes hanger. This self-locking windproof clothes rack can not only be hung on the rope by hand to dry clothes, but also the user does not need to climb up if he wants to dry clothes in a higher place. He can hang or take off his clothes easily just by holding the crank with the hook. At the same time, the clothes hanger also has the characteristics of simple manufacture, good reliability and low cost. My little invention won the national invention patent.
The lid of this carton is usually covered to prevent dirt and dust from entering. When you want to take the paper in the box, just lift the lid. With the lifting of the lid, the paper in the box will be lifted automatically, which is very convenient to pick up. After use, once the lid is closed, it will return to its original position. This kind of automatic paper box is most suitable for holding toilet paper. The size of the carton can be designed according to your own needs. Multimedia teaching resource library provided by China Education Star.
Interviewee: FQ Chenguang-Assistant Level 2 7- 13 23:26
Ordinary protractor is inconvenient to use. First of all, there are many steps to measure and draw an angle. Second, it has two scales, internal and external, and beginners are prone to make mistakes; Third, the corners with short sides must be extended before reading.
In view of the above shortcomings, we designed a new protractor, which is easy to use and can measure and draw angles in one go.
Rivet two identical protractors at the center of the circle and make them rotate flexibly. Cut the upper protractor along the right end with a gap 1 cm long (as shown in the figure). When measuring an angle, make its opening coincide with both sides of the measured angle, and the scale indicated by the notch is the degree of this angle; When drawing a corner, first aim the notch at a specified proportion, and then draw two rays along the opening. This protractor can also measure the angle of solid objects (such as nuts).
Because this protractor works like scissors, we call it "scissors protractor".
This is a toy made of a drink bottle and a bamboo tube. When the water bottle is filled with water, it will spray water and keep spinning, forming a circle of water curtain. Very beautiful. Would you like to do it with me?
1. First, prepare an empty plastic bottle for drinks and a bamboo tube with a diameter of 20mm and a length of 250 mm. It is best to use a bigger bottle for drinks, so that more water can be filled.
When making, first saw two saws between the two ends of the bamboo tube according to figure 1, and then saw off the upper part with a knife (pay attention to safety when operating with a knife! )。
2. Then drill a 5mm hole in the opposite direction slightly above the bamboo joints at both ends of the bamboo tube, and then plug it with two rubber or wooden plugs.
3. Unscrew the cover, drill a hole with a diameter of 2mm on the cover, pass through a section of 500mm long nylon rope and wrap a bamboo stick with a diameter of 4-5 (mm) long 15mm (Figure 2).
4. Drill a round hole with a diameter of 20mm at the corresponding position on both sides of the lower end of the beverage bottle. According to Figure 3, the length of the two exposed ends of the bamboo tube should be equal, and then paraffin (or glue) should be poured to block the joint to prevent water leakage.
Interviewee: Pikachu Pokemon-gatekeeper level 2 7- 14 16:5 1
Homemade flashlight
The specific manufacturing method is: lift one end of an abandoned can (such as Lulu beverage can) and beat the other end with a round hammer. 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. Find a suitable plastic cover (for example, the magic big roll cover can just be buckled on Lulu's beverage can), and dig a round hole in the center of the cover, the size of which is suitable for the light bulb to be inserted tightly. Insert the bulb base into the small hole. Take a section of tracing wire, peel off the wire skin at both ends, wrap one end around the lamp cap, 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. When in use, the flashlight will glow when you press the wire on the upper side wall of the unpainted weld of the pop-top can with your thumb, and the flashlight will go out when your thumb jumps off the wire, which is very convenient to use.
Aerospace 777 | 2009-09- 17
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Self-made badminton
Preparation materials: an empty beverage bottle, two foam fruit nets, a rubber band and a glass ball.
Production process:
1. Take an empty 250ml beverage bottle and cut off the upper part of the bottle body;
2. Divide the cut part into 8 parts, cut it to the bottleneck with scissors, and then cut each part into a petal shape with the same size;
3. Cover the foam fruit net outside the bottle and fix it at the mouth of the bottle with a rubber band;
4. Wrap a glass marble with another foam fruit net and plug it into the bottle mouth until it is exposed about1cm;
5. Cut off half a table tennis ball, cover the bottom of the hemisphere on the bottle mouth, cut the four sides into whiskers, cover the bottle mouth and fix it with rubber bands.
6. After beautification, a homemade badminton is finished. Hit a dozen with a badminton racket and see how it works.