Over-insertion prevention mechanism

The utility model aims to provide the over-insertion prevention mechanism which is good in stability, high in safety and capable of effectively preventing PCBA products from being damaged. The side insertion module comprises a mounting plate and a side insertion module body, the side insertion module body and a carrier plate are both arranged on the mounting plate, the side insertion module body is matched with PCBA products on the carrier plate, a throttling valve is arranged on the mounting plate, the side insertion module body comprises a first driving air cylinder, a movable plate, a plurality of fixed connectors and a plurality of movable connector assemblies, and the movable connector assemblies are arranged on the movable plate. The first driving air cylinder is in transmission connection with the movable plate, the multiple fixed connectors are all matched with the PCBA product, the multiple movable connector assemblies and the multiple fixed connectors are all arranged on the movable plate, and the t