Brief description: For each batch of screw“Protection life”test，“Screw protection life”It determines the total number of times of manual operation of the manual care bed to the highest point and the bottom point when manually lifting the back and legs; (screw protection life tester) is equipped with front and rear limit sensor switches, which can be suitable for detecting lengths and strokes. Different screws; operated by the motor, the inductive switch cooperates to realize the dry running protection life from automatic running to the longest stroke and the shortest stroke.

Test standard: The screw running life test is calculated by 8 hours per day, and can run 14400 times before and after the air; after the test is completed, the screw runs smoothly, the lubrication is no abnormal, no card position, and the air runs smoothly.