Abstract: A blood check device comprises a needle, a barrel connecting the needle, a check tube inserted in the barrel, a sleeve connecting the barrel, and a connecting hose connecting the sleeve. A rear end of the connecting hose connects an infusion bottle. The barrel has a soft pipe and an annular rib disposed in an inner periphery of the soft pipe. An end flange is disposed on a rear open end of the check tube. A tapered notch is formed on a front close end of the check tube. The tapered notch communicates with a hollow interior of the check tube.

Abstract: The present invention relates to a safety device for a baby walker which has a main wheel and an auxiliary wheel. By using a main wheel lock plate and a telescopic pipe, a ratchet on the main wheel can be prevented from blocking by a lock block under normal circumstances. While moving on a slope the lock plate will block the ratchet by its own weight to control baby walker without sliding. By using an auxiliary wheel lock plate and a fixed spring, the lock can also be blocked in normal circumstances. The auxiliary wheel can be suspended in the air and the movable shaft always faces toward the motion direction. In this way, the baby walker will not fall on a hollow ground (such as stairs) and will automatically stop sliding on a slope, with the lock block blocking the auxiliary wheel ratchet and auxiliary wheel friction surface.