| 摘要 |
The present invention relates to a seesaw which is an exercise and playing tool. The seesaw is an interesting playing tool, but it is hard for two persons with different body weight to use. Usually, several seats are arranged back and forth to adjust the weight of both sides by the theory of lever. But, then a person moved to the front loses interest because up and down movement distance becomes short. In order to solve the problem a sliding bar is installed in the center of a seesaw plate, and a sliding weight with proper weight is installed in the sliding bar. And, if the sliding weight is moved to the left and right to adjust the weight of both sides by using the theory of lever, two persons at both sides can enjoy the seesaw pleasantly. |
