44results about How to "Easy to fold and place" patented technology

The invention discloses a tool ruler which comprises a first ruler body, a second ruler body and a locking structure. The first ruler body is provided with a first scale part, the second ruler body is provided with a second scale part, the second ruler body is slidably connected to the first ruler body, and the second ruler body can slide relative to the first ruler body in the length direction of the first scale part. The second scale part can stretch out and draw back in the length direction of the first scale part, and the first ruler body and the second ruler body can be locked or unlocked through the locking structure. By means of the telescopic movement between the second scale part and the first scale part, line segments with different lengths can be measured or drawn, good adaptability is achieved, carrying and folding placement can be convenient, and use is convenient.

The invention discloses a foldable one-piece teaching desk comprising a vertical main board body fixed on the ground; the middle of left side wall of the vertical main board body is provided with a backrest placing groove; a backrest plate is arranged in the backrest placing groove; the top of the backrest plate is hinged to the top surface of the backrest placing groove; the inner side wall of the middle of the backrest placing groove is provided with a placing slot; a buffer spring is plugged and sleeved in the placing slot; one end of the buffer spring is fixed on the side wall surface of the placing slot, and the other end of the buffer spring is fixed on a push block; the push block presses against the backside of the backrest plate; a seat board is hinged to the lower portion of the left side wall of the vertical main board body, and presses against the left side wall and the backrest plate of the vertical main board body; the top of the seat board is fixedly provided with a plurality of positioning columns; the left side on the top surface of the vertical main board body is provided with a left positioning column; a buckle is hinged to the left positioning column; the positioning column is clamped in a hook portion of the buckle; the foldable one-piece teaching desk is small in land occupation, convenient in folding and placement, so students can conveniently walk in a classroom.

The invention discloses an agricultural airing device which comprises a first storing groove. The first storing groove is internally provided with a first annular limiting strip. A first filtering netis arranged on the upper surface of the first annular limiting strip. First sliding blocks are arranged on the front and rear portions of the left end of the upper surface of the first storing groovecorrespondingly. A second storing groove is formed in the left side of the upper portion of the first storing groove. First sliding grooves are formed in the front and rear portions of the right sideof the lower surface of the second storing groove correspondingly. Each first sliding block is connected with the corresponding first sliding groove. First strip-shaped grooves are formed in the front and rear portions of the left side of the lower surface of the second storing groove correspondingly. A first supporting rod is connected to the left end in each first strip-shaped groove through arotating shaft. A second annular limiting strip is arranged in the second storing groove. A second filtering net is arranged on the upper surface of the second annular limiting strip. The agriculturalairing device has the beneficial effects that grain is conveniently filtered, the agricultural airing device is placed in a folded mode conveniently and folded in time conveniently when it rains, andneatening is facilitated.

The invention relates to a combined fast blocking device based on an arched roadway, which includes a temperature-sensitive airbag, a combined bracket and an automatic inflation system, the combined bracket is arranged inside the temperature-sensitive airbag to support and fix the temperature-sensitive airbag, the temperature-sensitive airbag and the automatic inflation system connection. The temperature-sensing airbag is an airbag with an arched top, and its material can sense the surrounding temperature, and present different colors according to different surrounding ambient temperatures to achieve multi-stage color change. The automatic inflation system includes a temperature sensor, a pressure sensor, a computer, an inflation device, an inflation solenoid valve, and an exhaust solenoid valve. The invention has a simple structure, can realize fast assembly and disassembly, and can realize automatic inflation and deflation according to the set temperature and pressure.

The invention discloses a freely-matched assembled high-protection table trolley. The trolley comprises a trolley body, wherein a first main mounting frame is arranged in the trolley body; a front endof the first main mounting frame is fixedly connected with a first hinge; a lock catch is fixedly mounted at the front end of a second protective door; the first protection door and the second protection door are detachably connected through a lock cylinder and the lock catch; and a right end of the second protection door is movably connected with a second main mounting frame through the first hinge, the inner sides of the second main mounting frame and the first main mounting frame are fixedly connected with a second hinge, the rear end of the second hinge is fixedly connected with a rear protection frame, and inner portions of the second main mounting frame and the first main mounting frame are detachably connected with a placement plate. According to the freely-matched assembled high-protection table trolley, an angle of the placement plate is adjusted, overall flexibility is improved, an object damage probability is reduced, and overall practicability is improved, the freely-matched assembled high-protection table trolley is stable after being installed, and the overall stability is improved.