Shock resistance circuit board mounting structure in pit

The utility model discloses a shock resistance circuit board mounting structure in pit, including outer support frame and internal branch strut, outer support frame front end portion, back tip and middle part are integrative to be constituted, and local inside extension of the inner wall of tip forms a ring baffle that has the through -hole before the shaft type, back tip connects with an activity and is connected, the middle part of support frame outside is installed to the internal branch strut, and the both ends of internal branch strut are for the cylindric and install respectively in the inboard of preceding tip with the back tip of outer support frame, and the middle part of internal branch strut is cambered surface shape, and the inboard at internal branch strut both ends is formed with the baffle ring and an annular metal rubber is respectively installed to its inside, including the circuit board is installed on the support frame, it connects to install the multicore contact pin in the preceding tip of support frame outside. The structrual installation is convenient, simple structure, reliable and stable, and whole dismouting is changed conveniently, can furthest reduces shock and vibration and to the influence of circuit board, guarantees the permanent continual and steady work of circuit board.