▎ 摘　　要

NOVELTY - The baby carriage has a lever that is located below an air rotating rod (2), and the upper end of the straight wheel is fixed with a round top rod (10). A support rod (1) is fixed to the lower end of the vehicle portion The round head push rod is clamped with the support rod, and the round head push rod is located in the support rod. The inner wall of the vertical section of the support rod is connected with two middle-shrinkable snap rings (5), and an upper baffle (6) is provided above the upper middle-shrinkable snap ring. A lower baffle ring is provided below the centrally retracted snap ring, and the lower baffle ring and the upper baffle are fixed to the inner wall of the support rod. The end of the air rotating rod close to the supporting rod is fixed with an air sealing sheet (7). A lower repelling ball (8) is fixed to the end of the air-sealing sheet close to the support rod, and the ends of the lower repelling ball and the round top rod are matched with each other. USE - High-stability baby carriage convenient for going up and down the escalator. ADVANTAGE - The baby carriage effectively avoids the situation that the wheels hang in the air or the baby basket is tilted when going up and down the escalator, and significantly improve the stability and safety when going up and down the escalator. The difficulty of operation is significantly reduced, and the convenience of operation for parents traveling alone with a baby is improved. The vehicle portion is lifted up, so that the round-headed jack rod leaves the centrally-retracted snap ring and snaps into the lower centrally-retracted snap ring, which significantly reduces the difficulty of operation and realizes the change of its height. The lower repelling ball moves upward and jams into the card slot, so that the lower repelling ball is not easy to be squeezed back into the air rotating rod. The carriage effectively guarantees the repulsive force generated by the push rod, reduces the difficulty of the user's operation, and the card slot matches the lower repelling ball. The support rod is communicated with the air-rotating rod, which effectively prevents the air from leaking out of the air-rotating rod. The compressed air increases the impact on the air seal, is convenient for the lower repelling ball to enter the support rod, and the generated repulsive force effectively assists the stretching of the support rod and the round head top rod, reduces the force that the user needs to apply, and improves the convenience of operation. The baby carriage effectively ensures that the lower repelling ball enters the top of the round head plunger. The flat structure of the lever lever facilitates the rapid longitudinal deformation of the pneumatic lever, and facilitates the leveraging of force to reduce the difficulty for the user to change the position between the round head top lever and the centrally retracted snap ring. The carriage effectively avoid a large positional deviation between the air rotating rod and the lever lever during stepping, and effectively ensure the smooth transfer of the air in the pre-flat bag. The variable strut is made of silicone rubber material, which provides a certain degree of elasticity. The graphene powder inside is dropped, thereby effectively reducing the friction between the round-head plunger and the shrink-shaped snap ring. The carriage reduce the difficulty of extending the support rod. The diameter of the dynamic seal ring is larger than the radial span of the powder outlet ring hole, so that the dynamic seal ring is not easy to fall off, and effectively ensures the blockage of the graphene powder. DESCRIPTION OF DRAWING(S) - The drawing shows a structure schematic diagram of the connecting portion of the air rotating rod and the supporting rod of a baby carriage with high stability convenient for upper and lower stairs. Supporting rod (1) Air rotating rod (2) Middle-shrinkable snap ring (5) Upper baffle (6) Air sealing sheet (7) Lower repelling ball (8) Round top rod (10)