The difference between the first gear and the second gear of the X-ray machine exposure hand switch, why is the design divided into two gears

Before clarifying the difference between the first and second gears of the X-ray machine exposure hand  switch, and why the design is divided into two gears, we must first understand the function of these two gears.
The first gear of our Newheek X-ray machine exposure hand switch is used to control the exposure preparation state, and the second gear is used to control the exposure.
As for why the X-ray machine exposure hand switch switch needs to be divided into two positions to complete the exposure, I will give you a simple example below. If the first gear completes the exposure directly, the doctor may unconsciously turn the hand switch switch at hand after the film is taken. If you accidentally touch the gear position, it will cause exposure, and the exposure will definitely produce X-rays. If similar situations occur frequently, it will be harmful to doctors and patients. If the hand switch has two gears To complete the exposure, the probability of triggering this exposure is reduced.
Second, setting two gears serves as a reminder and preparation. For example, before the film is taken, the doctor will tell the patient to set the position and start the exposure. At this time, the doctor can press the next gear to be in the ready state. If the patient’s position is not suitable, the patient can adjust the position in time without pressing again. Lower the second gear, which reduces the X-ray dose.