Support frame unit, spliced support frame and toy

The utility model discloses a support frame unit, which adopts the arrangement of inserting convex parts and inserting grooves on a unit body to assemble different numbers of support frame units to form spliced support frames with different heights, so that a track can be supported at different heights, and under the condition of ensuring that the number of the support frame units is sufficient, the support frame units can be assembled at different heights. The toy cannot be used when any support frame unit is damaged, so that the experience feeling of customers is ensured. 本实用新型公开了一种支撑架单元，采用单元本体上进行插接凸部和插接凹槽的设置以可将不同数量的支撑架单元进行组装形成不同高度的拼接式支撑架，从而可在不同的高度进行轨道的支撑，且在保证支撑架单元数量充足的情况下，任意支撑架单元的损坏均不会导致玩具无法使用，保证了客户的体验感。