A noise-reducing helmet for civil aircraft maintenance personnel

Abstract

This utility model discloses a noise-reducing helmet for civil aviation aircraft maintenance personnel, including a helmet body (1), with two shielding areas (2) on both sides of the helmet body (1) to shield the wearer's ears; an adjustment wheel (3) is provided on the outer wall of the shielding area (2); the adjustment wheel (3) includes an adjustment wheel housing (31) rotatably connected to the outer wall of the shielding area (2); an annular cavity is formed between the adjustment wheel housing (31) and the outer wall of the shielding area (2); multiple filling sectors (4) are provided in the annular cavity; an opening (32) communicating with the atmosphere is provided on the inner wall of the adjustment wheel housing (31) corresponding to each filling sector (4); at least one sound guide hole (5) penetrating through its side wall is provided on the shielding area (2). This utility model can adjust the filling material facing the ears for different scenarios to meet the needs of aircraft maintenance personnel in different scenarios.

Description

Technical Field

[0001] This utility model relates to the field of helmet technology for civil aviation, specifically a noise-reducing helmet for civil aviation maintenance personnel. Background Technology

[0002] Helmets are tools used to protect the head. While modern helmets offer a certain level of comfort and safety, their applicability remains significantly limited, especially in the specialized fields of civil aviation. Single-function helmets are no longer sufficient for the complexities of modern work. Aircraft maintenance personnel work long hours on airport tarmacs, exposed to extremely harsh noises from aircraft engines, auxiliary power units, and ground power equipment. Prolonged exposure to this noise not only reduces hearing sensitivity but also significantly impacts their physical and mental health. Furthermore, working in high-noise environments reduces efficiency and increases the probability of maintenance errors. Human error is extremely dangerous in civil aviation maintenance; numerous air disasters in history have been caused by human error by maintenance personnel. Existing noise-canceling helmets for maintenance personnel simply completely seal the ears, offering poor adaptability to various scenarios. Utility Model Content

[0003] The purpose of this invention is to solve the technical problems existing in the prior art and provide a noise-reducing helmet for civil aviation maintenance personnel. This invention can adjust the filling material facing the ear for different scenarios. By utilizing the different porosities of different filling materials, the noise level entering the ear can be switched to meet the needs of maintenance personnel in different scenarios.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A noise-reducing helmet for civil aviation maintenance personnel includes a helmet body, with shielding areas on both sides of the helmet body to shield the wearer's ears; an adjusting wheel is provided on the outer wall of the shielding area; the adjusting wheel includes an adjusting wheel housing rotatably connected to the outer wall of the shielding area; an annular cavity is formed between the adjusting wheel housing and the outer wall of the shielding area; multiple filling sectors are provided in the annular cavity; an opening communicating with the atmosphere is provided on the inner wall of the adjusting wheel housing corresponding to each filling sector; and at least one sound guide hole is provided on the shielding area through its side wall.

[0005] As an optimization, all sound guide holes are located inside the annular cavity, and when the adjusting wheel housing is rotated, any filling sector can be rotated to cover all sound guide holes.

[0006] As an optimization, the adjusting wheel housing is rotatably connected to the outer wall of the shielding area by a bolt located at its center; the outer surface of the outer wall of the shielding area that is in close contact with the inner end face of the adjusting wheel housing is a plane.

[0007] As an optimization, the material filling the filled sector is a porous material; at least two filled sectors are filled with porous materials with different pore densities. Specifically, this can be a foamed material, such as sound-absorbing sponges with different pore densities.

[0008] As an optimization, the annular cavity is provided with three filling sectors; two of these sectors are filled with sound-absorbing sponges of different pore densities. These sound-absorbing sponges of different pore densities are commercially available and are materials already in the art.

[0009] As an optimization, the sound-absorbing sponge is fixed relative to the adjusting wheel housing, and the sound-absorbing sponge can rotate along with the adjusting wheel housing, closely adhering to the outer wall of the shielding area.

[0010] As an optimization, the helmet body is equipped with a forward-facing searchlight.

[0011] As an improvement, the helmet body is equipped with goggles.

[0012] The beneficial effects of this utility model are: the adjustment wheel of this utility model can accommodate a variety of filling materials, preferably sound-absorbing sponges with different pore densities as filling materials, and one area can be left unfilled. By rotating the adjustment wheel to adjust the filling material in the sound guide hole, different noise reduction levels can be adjusted, which greatly improves the adaptability of the helmet to meet the needs of maintenance personnel in different scenarios. When it is necessary to talk, the adjustment wheel can be adjusted to the area without filling material without taking off the helmet. Attached Figure Description

[0013] Figure 1 This is a left view of the helmet in Example 1.

[0014] Figure 2 This is the front view of the helmet in Example 1.

[0015] Figure 3 This is a partial cross-sectional view of the helmet in Example 1.

[0016] Figure 4 for Figure 3 A magnified view of a portion of area A in the middle.

[0017] Figure 5 This is a partial cross-sectional view of the helmet in Example 1.

[0018] The components include: 1. Helmet body; 2. Covering area; 3. Adjustable wheel; 31. Adjustable wheel housing; 32. Opening; 4. Filling sector; 5. Sound guide hole; 6. Searchlight; 7. Goggles. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0020] Example 1

[0021] Now combined Figure 1-5 This invention describes a noise-reducing helmet for civil aviation aircraft maintenance personnel, comprising a helmet body 1, with ear-covering areas 2 on both sides of the helmet body 1; an adjustment wheel 3 is provided on the outer wall of the ear-covering area 2; the adjustment wheel 3 includes an adjustment wheel housing 31 rotatably connected to the outer wall of the ear-covering area 2; an annular cavity is formed between the adjustment wheel housing 31 and the outer wall of the ear-covering area 2; three filling sectors 4 are provided within the annular cavity; each filling sector is filled with sound-absorbing sponge of different pore densities. The sound-absorbing sponges of different pore densities are commercially available and belong to the prior art. Specifically, the sponge with a specific pore density can be selected as needed to switch between different levels of noise reduction. This utility model does not limit the filling material. The inner wall of the adjusting wheel housing 31 corresponding to each filling sector 4 is provided with an open opening 32 that connects to the atmosphere, so that external sound can pass through the corresponding filling sector 4. The sound-absorbing sponge is fixed relative to the adjusting wheel housing 31, and the sound-absorbing sponge can rotate with the adjusting wheel housing 31, closely adhering to the outer wall of the shielding area 2. The shielding area 2 is provided with 3 sound guide holes 5 penetrating its side wall. When the adjusting wheel housing 31 is rotated, any filling sector 4 can be switched to cover these 3 sound guide holes 5.

[0022] The adjusting wheel housing 31 is rotatably connected to the outer wall of the shielding area 2 by a bolt located at its center; the outer surface of the outer wall of the shielding area 2 that is in close contact with the inner end face of the adjusting wheel housing 31 is a plane.

[0023] The helmet body 1 is equipped with a forward-facing searchlight 6. The helmet body 1 is also equipped with goggles 7. Preferably, the helmet body 1 also has a flexible liner inside to increase the fit with the wearer's ears and head. The liner inside the helmet body 1 fits snugly against the wearer's ears.

[0024] In this embodiment, the noise-reducing helmet for civil aviation maintenance personnel can be adjusted by rotating the adjustment wheel 3 to align sound-absorbing sponges with different pore densities facing the sound guide hole 5. This allows for targeted switching of noise levels in different scenarios, adjusting the degree of shielding the ears from environmental noise. For example, in areas with high noise levels, rotating the sound-absorbing sponge with a higher pore density and poorer sound transmission to face the sound guide hole 5 will cover the helmet's sound guide hole 5, improving the noise reduction effect. In areas with lower noise levels, rotating the sound-absorbing sponge with a lower pore density and better sound transmission to face the sound guide hole 5 will reduce the noise reduction effect and facilitate conversation, thus greatly improving the helmet's adaptability.

[0025] Example 2

[0026] Unlike Example 1, four filling sectors 4 are set up, of which the sound-absorbing sponge of three filling sectors 4 is the same as that of Example 1, and the newly added filling sector 4 is not filled with any material; this allows the ear to directly receive ambient sound for communication in noise-free environments.

[0027] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Again, the present invention does not limit the filling material, but only protects a helmet structure that can adjust the noise reduction level of the helmet by filling different materials so that different materials are positioned directly in front of the ears. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0028] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be considered as covering all changes and modifications that encompass the true intent and scope of this utility model. Any and all equivalent scope and content within the scope of the claims should be considered as still falling within the intent and scope of this utility model.

Claims

1. A noise-reducing helmet for civil aviation aircraft maintenance personnel, comprising a helmet body (1), wherein the helmet body (1) has covering areas (2) on both sides for covering the wearer's ears; characterized in that, An adjusting wheel (3) is provided on the outer wall of the shielding area (2); the adjusting wheel (3) includes an adjusting wheel housing (31) rotatably connected to the outer wall of the shielding area (2); an annular cavity is formed between the adjusting wheel housing (31) and the outer wall of the shielding area (2); a plurality of filling sectors (4) are provided in the annular cavity; an opening (32) communicating with the atmosphere is provided on the inner wall of the adjusting wheel housing (31) corresponding to each filling sector (4); at least one sound guide hole (5) penetrating its side wall is provided on the shielding area (2).

2. The noise-reducing helmet for civil aviation maintenance personnel according to claim 1, characterized in that, All sound guide holes (5) are located inside the annular cavity. When the adjusting wheel housing (31) is rotated, any filling sector (4) can be rotated to cover all sound guide holes (5).

3. The noise-reducing helmet for civil aviation maintenance personnel according to claim 1, characterized in that, The adjusting wheel housing (31) is rotatably connected to the outer wall of the shielding area (2) by a bolt located at its center; the outer surface of the outer wall of the shielding area (2) that is in close contact with the inner end face of the adjusting wheel housing (31) is a plane.

4. The noise-reducing helmet for civil aviation maintenance personnel according to claim 3, characterized in that, The filling sector (4) is filled with a porous material; at least two filling sectors (4) are filled with porous materials with different pore densities.

5. The noise-reducing helmet for civil aviation aircraft maintenance personnel according to claim 1, characterized in that, The annular cavity is provided with three filling sectors (4); two of the filling sectors (4) are filled with sound-absorbing sponges with different pore densities.

6. The noise-reducing helmet for civil aviation maintenance personnel according to claim 5, characterized in that, The sound-absorbing sponge is fixed relative to the adjusting wheel housing (31), and the sound-absorbing sponge can rotate along with the adjusting wheel housing (31) in close contact with the outer wall of the shielding area (2).

7. The noise-reducing helmet for civil aviation maintenance personnel according to claim 6, characterized in that, The helmet body (1) is equipped with a forward-facing searchlight (6).

8. The noise-reducing helmet for civil aviation maintenance personnel according to claim 7, characterized in that, The helmet body (1) is equipped with goggles (7).

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