Preparation process of individual noise-reducing earmuffs with pull-out grid

Abstract

The invention provides a withdrawing grid type individual noise reduction ear muff and a preparation process thereof, belonging to the technical field of occupational health. The withdrawing grid type individual noise reduction ear muff comprises a left ear muff and right ear muff connecting piece, a withdrawing slot, a withdrawing button, an external sound insulation piece, a sound insulation underframe and a photosensitive composite resin layer, wherein the two ends of the left ear muff and right ear muff connecting piece are respectively connected with the sound insulation underframe; the withdrawing slot is in a slide way structure and is in slide connection with the withdrawing button; the external sound insulation piece is arranged at the lower part of the withdrawing button; the sound insulation underframe comprises an upper-layer frame, a middle-layer frame and a lower-layer frame; the upper-layer frame is movably connected with the external sound insulation piece; the photosensitive composite resin layer is continuously distributed on the raised skeleton structure of the external edge of the lower-layer frame of the sound insulation underframe; and the thickness of the photosensitive composite resin layer is 0.5-3cm. The withdrawing grid type individual noise reduction ear muff meets the requirement of operating personnel for protective efficiency of noise control equipment under different conditions, avoids the damage of the internal acoustic meatus and hearing loss of the operating personnel, and basically arouses the enthusiasm of the operating personnel for using individual noise control articles so as to achieve the aim of individual noise control.

Description

technical field [0001] The invention belongs to the technical field of occupational hygiene, and in particular relates to a pull-out noise reduction earmuff. Background technique [0002] At present, there are a large number of workers in China who are exposed to noise with different spectrum characteristics for a long time in the workplace. On-site investigations found that in the workplaces of most industrial enterprises, the noise intensity exceeds the "Occupational Exposure Limits of Hazardous Factors in the Workplace". Noise intensity specified in Part Two: Physical Factors (GBZ 2.2-2007). At present, there are a large number of workers in China who suffer from hearing loss or even noise deafness due to excessive noise in the workplace. [0003] The on-site investigation found that at present, most large and medium-sized enterprises have equipped their workers with individual noise-proof earplugs of qualified quality and sufficient quantity, but it is rare for workers ...

AI Technical Summary

Problems solved by technology

[0005] At present, the existing external earmuffs on the market are only for home use, and cannot fully fit the shape of the user's ear, oppress the outer auricle and reduce the noise effect, and are not suitable for workers to wear in the workplace

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