Product name：KX2177The bicycle in the painting
"Size"：128*88*80mm
Weight：about30g
Material：wood、Plastic accessories、Metal fittings。
Color：混色
是否使用电池:否
装箱：400 pcs
Box gauge：600*450*550mm
Preface：
Today, with an increasing emphasis on children's education，Scientific enlightenment education has gradually become an important topic pursued and explored in the field of education nowadays。More and more teachers and parents are beginning to pay attention to cultivating children's scientific literacy from an early age，Help children develop good character and behavioral habits from the very beginning。Parent-child interactive handicrafts can enhance the quality of parent-child companionship，Improve parent-child relationships，The time we spend with our children，No mobile phone、ipad、Television，Only joy，Interaction and communication。 It can cultivate children's ability to solve problems by themselves when they encounter problems，Children should first see and experience the solution by themselves，Because this is how my parents and teachers solve problems while doing handicrafts。 It can develop children's imagination，In a child's world，Cars can fly in the sky、The sun can be green...... Play handicraftsDIYChildren's hands-on ability can be cultivated by using different tools，The child's little hands got sufficient exercise。Brush、Pigment、Scissors、Hot-melt gun、Glue.....，Dare to try any tool，It is also developing different skills to a certain extent。 Boosting children's self-confidence during the process of handicrafts，Let's try every possible way together，Have experienced many failures，But it always succeeds，To a certain extent, it enhanced his self-confidence。 Cultivate children's concentration when they are exploring various tools and handicrafts，He is very focused，If there is no external disturbance，He can keep exploring。
1.展示课前制作好的动中画自行车模型
想一想：
1.Take a look at what materials the moving picture bicycle model is made of？
2.What is the working principle of the "Painting in Motion" bicycle？
The motion picture bicycle model we designed is made of pulleys，Yellow rubber band，Nylon column，Axle，It is composed of semi-transparent gaskets, etc。
1.Do you know the working principle of the "Painting in Motion" bicycle？
基本原理
The bicycle in the painting实际上利用的是链条带动齿轮传动的原理，The middle position inside the air bicycle3It is powered by a large vessel，Power is transmitted to both sides through a belt1"Number and2Small wheel，The large wheel in the middle serves a variable-speed function，When the big wheel turns1The small wheel will turn twice。In this way, when we rotate the joystick, the wheels on both sides will rotate faster than the joystick。
What are the differences between the bicycle in motion Painting and the bicycles in our daily life？
In real life, the common bicycles only have the rear wheel as the power wheel，The front wheels are driven wheels，Only when the rear wheels rotate and come into contact with the ground, friction pushes the front wheels to rotate，The front wheels, as driven wheels, can rotate left and right to control the direction。If we want the model of the aerial bicycle we make to have only one wheel rotating, we can remove the belt on the side of the wheel that is not allowed to rotate。
课堂拓展
同学们喜欢Riding a自行车吗?你们认为Riding a自行车有哪些好处？
Do you know?？
The bicycle is one of the best tools to overcome heart problems。More than half of the people in the world die of heart disease。Cycling is not only about compressing blood flow through leg movements，And draw blood back to the heart from the extremities of the blood vessels，In fact, it simultaneously strengthened the microvascular tissue，This is called"Attached loop"。Strengthening blood vessels can protect you from the threat of age，Eternal youth。
In addition，习惯性的Cycling，It can gradually expand your heart。Otherwise, the blood vessels will become thinner and thinner，The heart is deteriorating more and more.，In old age，You will then experience the troubles it brings，Then you will find out，How perfect cycling is。
Cycling同时也能防止高血压，Sometimes it is more effective than medicine。It can also prevent weight gain、Vascular hardening，And make the bones strong。Bicycles enable you to stay healthy without the need for medication，And it does no harm at all。
Bicycles are tools for losing weight，According to statistics，75A person weighing kilograms，Per hour9A speed of one and a half miles，Riding a73Miles，It can reduce half a kilogram of weight，But it must be done consistently every day。
Cycling，Not only can it help lose weight，It can also make your figure more proportionate and charming。That is, losing weight through exercise，Or people who exercise while on a diet，The figure is better than that of people who only lose weight by dieting，More charming。