Passive infrared ray reflection small ball

The utility model discloses a passive infrared ray reflection small ball. The passive infrared ray reflection small ball comprises a ball body, an antimicrobial coating, reflection coating film, an installation base inlet, an installation base and an installation support. The small ball is reasonable in structure and lower in manufacturing cost. Compared with an active infrared ray reflection small ball, the passive infrared ray reflection small ball does not need electric power to provide infrared rays, so that a set composed of the small ball is small in size, limitation of electric wires is avoided, and the small ball can be flexibly and freely placed at any position of surgical instruments. It is more important that the passive infrared ray reflection small ball cannot generate an infrared source so that other surgical instruments cannot be disturbed, the shape and the position of the passive infrared ray reflection small ball set can be customized according to requirements of doctors, and the visible scopes of the surgical instruments are expanded. The whole ball body is wrapped by the reflection coating film, so that it can be guaranteed that infrared rays transmitted from various directions can be well reflected back, and the position installation of the passive infrared ray reflection small ball is more flexible and convenient. Meanwhile, the antimicrobial coating is used, so that it can be guaranteed that bacteria cannot be bred easily, and the operation effect can be better guaranteed.