Prevent the appearance box pnematic sample presentation send-receiver device who scurries out

The utility model provides a prevent the appearance box pnematic sample presentation send-receiver device who scurries out which includes: the receiving and dispatching seat of honour, the central passage is established along the axial in the middle part, establishes the installation through-hole on the lateral wall, receiving and dispatching are lower, upper end and receiving and dispatching seat of honour bottom cooperation, and the through-hole is established at the middle part, proximity switch, the insert is in the installation through-hole, the cylinder, the piston supports foot stall portion under receiving and dispatching, establish the recess on the inner wall of central passage one side, the blind hole is established to recess bottom lower part, forms L shape structure, and the recess leans on blind hole side inner wall to establish the passageway, a inner wall of the port recess of limiting on the passageway, eccentric dog is L shape, corresponds the recess, including backstop portion and connecting portion, and in backstop portion locates the recess, connecting portion and blind hole inner wall pivoted joint, eccentric dog focus and connecting portion pivoted joint point be not on same straight line, a push rod, insert are in the passageway, and the lower extreme exposes in the receiving and dispatching seat of honour, the upper end tip side spacing portion of projected. Said device need not control and power, and receiving and dispatching are during lower improper opening, prevents effectively that appearance from box scurrying out, ensures the operating personnel personal safety.