99results about How to "Avoid walking" patented technology

The invention discloses a mobile multi-functional folding ladder. The mobile multi-functional folding ladder comprises two hinged top plates and ladder frames separately arranged at the bottoms of twotop plates, the ladder frames each comprise two parallel supporting legs arranged at the bottom of the corresponding top plate and a plurality of lateral supporting rods arranged between the corresponding two supporting legs, universal wheels are arranged at the bottoms of the supporting legs, movable sleeves are slidably arranged on the supporting legs, positioning sleeves are arranged at the bottoms of the movable sleeves, the universal wheels are located in the positioning sleeves, tension mechanisms are arranged between the movable sleeves or / and the positioning sleeves and the supportinglegs, a connecting mechanism is arranged between the movable sleeves on the two parallel supporting legs of the same ladder frame, an angle positioning mechanism is further arranged between the adjacent two ladder frames, and the angle of unfolding between the two ladder frames is locked by the angular positioning mechanism. The mobile multi-functional folding ladder solves the problem that a current folding ladder cannot meet the requirements of stable movement and continuous work of an operator sitting on the folding ladder, and solves the problems that the folding ladder is turned over dueto center-of-gravity shift during the movement and the folding ladder cannot be stopped and positioned in time during the movement.

The invention discloses a safety protection device of a railroad platform door, relates to the technical field of railroad platform protection equipment, and solves the problems that complex device structure and high construction cost exist when the prior art solving the passenger safety protection problem at the platform door. The safety protection device of the railroad platform door comprises the platform door which devices a platform into a waiting area and a loading area, and the platform door comprises fixed parts on the two sides. A sliding door is arranged on the fixed parts, mountinggrooves used for containing the sliding door are formed in the fixed parts, and strip-shape openings communicating with the mounting grooves are horizontally formed in the side surfaces, located in the loading area, of the fixed parts. Rack mechanisms corresponding to the strip-shape openings are horizontally arranged on the surface of the sliding door. Rotatable stand columns are arranged at thenotches, close to the mounting grooves, of the loading area, half gears matched with the rack mechanisms through strip-shape openings are arranged on one side surfaces of the stand columns, and baffles are fixedly arranged on the other sides of the stand columns.

The invention discloses a concealed wiring keyboard, including a keyboard main body, a storage rotating shaft vertically arranged on the keyboard main body, a storage groove arranged around the storage rotating shaft, a connecting wire connected with the storage rotating shaft and arranged in the storage groove, a connector arranged at the front end of the connecting wire, an outer cover arrangedon the storage groove, and an opening arranged on the rear side of the keyboard main body and communicated with the storage groove. The invention provides a concealed wiring keyboard, which is simplein structure, can effectively store computer connection cables, utilizes space more reasonably, reduces the encroachment of keyboard connection cables on space, and makes the desktop of a user more concise.