Yo-yo structure

The structural schematic diagram of Youyou is as follows:

Including wooden bearings, nylon bearings, ball bearings kk bearings, the whole can be disassembled, and the rope is sleeved on the bearings, which can be idle for a long time. Suitable for rope play and sleeping play, it can be used as a variety of fascinating techniques such as "tornado, gale". Suitable for middle and advanced players. Nylon bearings can reduce friction and prolong idling time.

The reason is that the metal shaft is equipped with nylon bearing, and the rope is sleeved in the groove of nylon bearing. The friction between the rope and the shaft is replaced by the lower sliding friction between the bearing and the metal shaft, and the resistance is reduced, so the idling time can be extended by 2-3 times.

The idle time of the ball bearing is longer. The secret lies in that there are many small steel balls that can roll flexibly between the inner and outer shafts. Through the rolling of the small steel balls, the inner and outer bearings can rotate smoothly, effectively reducing the friction resistance.

Extended data

Rules of World Series:

The total score of the contestants will depend on their technical execution (T.E.) and performance style (P.S.), plus compulsory action scores, which will be converted into the total score.

The full score is 100, that is, for the first time, the player was judged by all the judges in terms of technical execution (T.E.) and performance style (P.S.), with a total score of 90 (excluding the highest score and the lowest score), and at the same time he got 10 (50/5) in the compulsory action score.

The total score will be calculated as follows: (If you get 90.66, it will be converted into 90.7; If you get 90.65, it will be converted into 90.6).

In case of a tie, it shall be settled by the competition supervisor and the referee in the form of compulsory score and tiebreaker score.

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