Miniature measuring feet of retractable frame device under low clearance condition

The utility model discloses a miniature measuring feet of retractable frame device under low clearance condition relates to bridge constructional survey technical field. This foot rest device includethe panel, with three the leg that the panel is connected, three leg is evenly arranged on the panel, the frame leg is including put on the shelf leg and undercarriage leg, puts the leg suit on the shelf in the undercarriage leg, and leg and the undercarriage leg of putting on the shelf is through the connection of fastening bolt realization retractable, the tip of leg of putting on the shelf is provided with the connection horizontal pole, and the suit is in the hollow tube respectively to connect the both sides of horizontal pole, and the hollow tube is connected with the panel through the 2nd fastening bolt. The utility model discloses stable in structure, reasonable in design, not fragile, portable, accessible adjustment foot rest device highly carry out direct observation to the target, be applicable to the h