A compressed-air height-adjustable safety helmet for building construction

Abstract

The invention belongs to the technical field of safety helmets, in particular to an air-pressure height-adjustable safety helmet for building construction.The air-pressure height-adjustable safety helmet comprises rolling beads, a first cap shell, trigger mechanisms, driving mechanisms, an installation ring, a moving hole, a first spring, a sliding cavity, a second cap shell, a third cap shell, spherical holes, first circular holes, T-shaped grooves, etc. According to the air-pressure height-adjustable safety helmet, the arc inner wall of the third cap shell is evenly provided with four heat dissipation holes in the circumferential direction, so heat dissipation of a head part of a worker wearing the safety helmet is facilitated; andthe function of four T-shaped blocks installed uniformlyon the outer circular face of the third cap shell in the circumferential direction is to be matched with the corresponding T-shaped grooves on the installation ring, so as to guide and restrict the movement of the installation ring. According to the safety helmet, when not in use, the safety helmet space size is small at the moment, so the safety helmet saves space compared with a traditional safety helmet at the moment,and in the use process, increase of the height of the safety helmet can be used as the traditional safety helmet.

Description

[0001] Technical field [0002] The invention belongs to the technical field of safety helmets, and in particular relates to a pneumatic height-adjustable safety helmet for building construction. Background technique [0003] At present, the shell of the existing safety helmet is elliptical or hemispherical, with a smooth surface. When an object falls on the shell, the object cannot stop and slide down immediately; The reduced force of the liner can reach more than 2 / 3, and the rest of the force is transmitted to the human skull through the entire area of ​​the cap liner, so that the focus point becomes the force surface, thereby avoiding the impact force on a certain point on the cap shell. Concentration reduces the force per unit area, but such a structure takes up a lot of space, and at the same time it cannot withstand the impact of large blocks, so it is necessary to design a compressed air height-adjustable building construction hard hat. [0004] The present invention...

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Problems solved by technology

[0003] At present, the shell of the existing safety helmet is elliptical or hemispherical, with a smooth surface. When an object falls on the shell, the object cannot stop and slide down immediately; The reduced force of the liner can reach more than 2 / 3, and the rest of the force is transmitted to the human skull through the entire area of ​​the cap liner, so that the focus point becomes the force surface, thereby avoiding the impact force on a certain point on the cap shell. Concentration reduces the force per unit area, but such a structure takes up a lot of space, and at the same time it cannot withstand the impact of large blocks, so it is necessary to design a compressed air height-adjustable building construction hard hat

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