Multifunctional protective helmet for engineering construction

Abstract

The invention provides a multifunctional protection helmet for engineering construction, and belongs to the technical field of occupational protection devices. Comprising a helmet body, a supporting frame is fixedly connected to the bottom end of the inner wall of the helmet body, a rotating assembly is fixedly connected to the portion, close to the bottom, of the outer wall of the supporting frame, the rotating assembly is used for assisting in changing the position of an earmuff, and the rotating assembly is connected with the supporting frame; the adjusting assembly is used for adjusting the tightness degree of the mask, and the adjusting assembly is connected with the supporting frame. By arranging the rotating assembly and the adjusting assembly, the rotating assembly not only can support and fix the earmuffs, but also can protect the exposed back side of the head when noise reduction protection is not needed to be carried out on the ears, and the back neck part can be utilized to support the earmuffs, so that the load of the head is reduced; the adjusting assembly not only can quickly fix the mask, but also can conveniently adjust the tightness of the mask to adapt to users with different head circumferences, so that the wearing comfort is improved.

Description

Technical Field

[0001] The invention relates to the technical field of occupational protective equipment, and in particular to a multifunctional protective helmet for engineering construction. Background Art

[0002] During the demolition construction, a large amount of dust will be generated during the demolition process, especially during operations such as cutting, crushing and demolishing walls. The use of mechanical equipment such as cutting machines and breakers will generate high noise, posing a threat to the hearing of workers. In the summer, when performing open-air demolition operations or working in confined spaces, high temperature environments are prone to occur. The working environment of demolition construction is complex and there are many safety hazards.

[0003] In order to solve the above problems, various noise-proof earmuffs and dust-protection masks are available on the market. However, the existing protective helmets are still not comfortable for professionals to wear. When the earmuffs are not needed, the noise-proof earmuffs are rotated and placed on the safety helmet. Since the noise-proof earmuffs have a certain weight, the center of gravity of the safety helmet may change after the earmuffs are placed, resulting in instability when worn, affecting the protective effect. In addition, placing additional earmuffs on the safety helmet will increase the burden on the head and neck, and wearing it for a long time may cause neck fatigue or injury. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a multifunctional protective helmet for engineering construction. By arranging a rotating component and an adjusting component, the rotating component can not only provide support and fixation for the earmuffs, but also protect the exposed back of the head when noise reduction protection for the ears is not needed, and can also support the earmuffs with the back of the neck to reduce the load on the head; the adjusting component can not only quickly fix the mask, but also facilitate the adjustment of the tightness of the mask to adapt to users with different head circumferences, thereby improving wearing comfort. The above settings can solve the problem of poor wearing comfort of professional personnel in existing protective helmets.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A multifunctional protective helmet for engineering construction comprises a helmet body, wherein the bottom end of the inner wall of the helmet body is fixedly connected to a support frame, and the outer wall of the support frame is fixedly connected to a rotating component near the bottom, the rotating component is used to assist in changing the position of the earmuffs, and the rotating component is connected to the support frame; and an adjusting component, the adjusting component is used to adjust the tightness of the mask, and the adjusting component is connected to the support frame.

[0007] Optionally, the rotating assembly includes a telescopic frame fixedly connected to the outer wall of the support frame, the telescopic frame is fixedly connected with fixing clips on both sides close to the support frame and on both sides of the bottom of the helmet body, the two ends of the telescopic frame are slidably connected with earmuffs, the top of the earmuff is fixedly connected with a clamping block, and the top of the earmuff is clamped with the fixing clip through the clamping block.

[0008] Optionally, both ends of the telescopic frame are provided with sliding grooves, and a slider is fixedly connected to the outer wall of the earmuff at a position corresponding to the sliding groove, and the size of the outer wall of the slider is matched with the size of the inner wall of the sliding groove.

[0009] Optionally, the inner wall of the fixing clamp is adapted to the outer wall size of the clamping block, arc-shaped spring pieces are fixedly connected to the centers of both sides of the inner wall of the fixing clamp, and the length of the arc-shaped spring pieces is smaller than the length of the fixing clamp.

[0010] Optionally, the arc-shaped spring pieces are curved elastic structures, and the spacing between the arc-shaped spring pieces distributed opposite to each other is smaller than the size of the outer wall of the block.

[0011] Optionally, the adjustment component includes a supporting bracket fixedly connected to the bottom of the outer wall of the support frame, the supporting bracket having warped edge portions at both ends, limiting holes are provided at both ends of the supporting bracket near the warped edge portions, an adjustment belt is passed through the limiting hole, and evenly distributed limit blocks are fixedly connected at the center of the outer wall of the adjustment belt.

[0012] Optionally, the support bracket is a curved arc structure, and evenly distributed lightweight grooves are opened through the support bracket, and the edges of the lightweight grooves are all rounded.

[0013] Optionally, the inner wall size of the limiting hole is larger than the outer wall size of the adjusting belt, and the outer wall size of the limiting block is larger than the inner wall size of the limiting hole.

[0014] Optionally, masks are fixedly connected to both ends of the adjustment belt, the mask, the adjustment belt and the limit block are an integrated structure, and filter elements are connected to both sides of the mask.

[0015] Optionally, the support frame is a curved arc structure, and the support frame, telescopic frame and supporting frame are an integrated structure.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above scheme, by setting a rotating component and an adjusting component, the rotating component can not only provide support and fixation for the earmuffs, but also change the state of the earmuffs by the rotating component when noise reduction protection for the ears is not needed, thereby protecting the exposed back of the head, and supporting the earmuffs with the back of the neck to reduce the load on the head; the adjusting component can not only quickly fix the mask, but also facilitate the adjustment of the tightness of the mask to adapt to users with different head circumferences. Compared with directly hanging the mask on the ears, the adjusting component can avoid certain pressure and discomfort on the ears, thereby improving the wearing comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0019] Figure 1 This is a schematic diagram of a three-dimensional structure of the present invention in a first state and a first viewing angle;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention in the first state and the second viewing angle;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention in the first state and the third viewing angle;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention in the second state at the first viewing angle;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention in the second state and the second viewing angle;

[0024] Figure 6 It is a schematic diagram of an enlarged three-dimensional structure of the earmuff and the supporting assembly of the present invention;

[0025] Figure 7 It is a schematic diagram of an enlarged three-dimensional structure of the supporting frame and the adjusting belt of the present invention;

[0026] Figure 8 It is an enlarged three-dimensional structural schematic diagram of the earmuff and the fixing clip of the present invention in a separated state.

[0027] Reference numerals:

[0028] 1. Helmet body; 2. Support frame; 3. Telescopic frame; 4. Slide slot; 5. Earmuffs; 6. Block; 7. Slider; 8. Fixing clip; 9. Arc-shaped spring piece; 10. Support frame; 11. Warped edge; 12. Limiting hole; 13. Adjusting belt; 14. Limiting block; 15. Mask; 16. Filter element; 17. Lightweight slot.

[0029] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0030] The following is a detailed description of a multifunctional protective helmet for engineering construction provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0031] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0032] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0033] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0034] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0035] like Figures 1 to 8 As shown, an embodiment of the present invention provides a multifunctional protective helmet for engineering construction, including a helmet body 1, a support frame 2 is fixedly connected to the bottom end of the inner wall of the helmet body 1, a rotating component is fixedly connected to the outer wall of the support frame 2 near the bottom, the rotating component is used to assist in changing the position of the earmuffs 5, and the rotating component is connected to the support frame 2; an adjusting component, the adjusting component is used to adjust the tightness of the mask 15, and the adjusting component is connected to the support frame 2, the support frame 2 is a curved arc structure, and the support frame 2, the telescopic frame 3 and the supporting frame 10 are an integrated structure.

[0036] The multifunctional protective helmet for engineering construction provided in this application is suitable for complex working environments with multiple safety hazards such as demolition engineering construction. In engineering construction, commonly used anti-noise earmuffs models mainly come from well-known brands such as 3M. ​​This device also uses the same brand 3M earmuffs. The specific structure of the anti-noise earmuffs and their working principle are disclosed as prior art and will not be elaborated on here. In addition, this helmet is also provided with a strap to ensure that the helmet will not get loose during wearing. The specific structure, installation position and working principle of the strap are disclosed as prior art and will not be elaborated on here.

[0037] By setting a rotating component and an adjusting component, the rotating component and the adjusting component are respectively set on the ears and the back of the neck of the user. The rotating component can not only provide support and fixation for the earmuffs 5, but also when there is no need for noise reduction protection for the ears, the state of the earmuffs 5 can be changed by the rotating component, thereby protecting the exposed back of the head, and the back of the neck can be used to support the earmuffs 5 to reduce the load on the head; the adjusting component can not only quickly fix the mask 15, but also facilitate the adjustment of the tightness of the mask 15 to adapt to users with different head circumferences. Compared with directly hanging the mask 15 on the ears, the adjusting component can avoid certain pressure and discomfort on the ears, thereby improving the wearing comfort.

[0038] like Figures 1 to 8As shown, the rotating assembly includes a telescopic frame 3 fixedly connected to the outer wall of the support frame 2, and the telescopic frame 3 is fixedly connected with fixing clips 8 on both sides close to the support frame 2 and the bottom sides of the helmet body 1, and the two ends of the telescopic frame 3 are slidably connected with earmuffs 5, and the top of the earmuffs 5 is fixedly connected with a clamping block 6, and the top of the earmuffs 5 is clamped with the fixing clip 8 through the clamping block 6. Both ends of the telescopic frame 3 are provided with a slide groove 4, and the outer wall of the earmuffs 5 is fixedly connected with a slider 7 at the position corresponding to the slide groove 4. The outer wall size of the slider 7 is adapted to the inner wall size of the slide groove 4, and the inner wall of the fixing clip 8 is adapted to the outer wall size of the clamping block 6. Arc-shaped spring pieces 9 are fixedly connected at the centers of both sides of the inner wall of the fixing clip 8. The length of the arc-shaped spring piece 9 is less than the length of the fixing clip 8. The arc-shaped spring piece 9 is a curved elastic structure, and the spacing between the oppositely distributed arc-shaped spring pieces 9 is less than the outer wall size of the clamping block 6.

[0039] Specifically, the two ends of the telescopic frame 3 fixedly connected to the bottom of the support frame 2 can be telescoped, so as to adjust the position of the earmuff 5 to adapt to users with different head shapes. The telescopic frame 3 includes a fixed end and a telescopic end. The slide groove 4 is arranged between the fixed end and the telescopic end. The shape and size of the slide groove 4 are adapted to the slider 7, so that the slider 7 can only slide along the direction of the slide groove 4 to change the specific position of the earmuff 5, and the slider 7 can drive the earmuff 5 to rotate on the slide groove 4. The position of the earmuff 5 is adjusted by the cooperation of the slider 7 and the slide groove 4 (such as Figure 6 As shown), the earmuff 5 is fixed by the fixing clip 8 (as shown Figure 8 As shown in the figure), the length of the fixing clip 8 is greater than the length of the card block 6, so as to facilitate the position of the earmuff 5.

[0040] At the positions of the block 6 at the bottom of both sides of the helmet body 1 and at the connection between the telescopic frame 3 and the support frame 2, fixing clips 8 are fixedly connected on both sides. The openings of the fixing clips 8 at the bottom of both sides of the helmet body 1 face downward (such as Figure 8 As shown, the earmuff 5 is used in conjunction with the fixing clip 8 in the vertical state, and the opening of the fixing clip 8 at the connection between the telescopic frame 3 and the support frame 2 faces the free end of the telescopic frame 3 in the fully stretched state (as shown in FIG. Figure 6 As shown), it is convenient for the earmuff 5 to be used in conjunction with the fixing clip 8 in the horizontal state.

[0041] The shape and size of the fixing clip 8 are adapted to the outer contour size of the card block 6. Since a groove is provided through the center of the card block 6, arc-shaped spring pieces 9 are arranged opposite to each other on both sides of the inner wall of the fixing clip 8. The cooperation between the arc-shaped spring pieces 9 and the groove facilitates the fixing of the earmuffs 5 by the fixing clip 8 to maintain the stability of the entire helmet. The arc-shaped spring piece 9 is a curved elastic structure. Such a structural setting makes the overall structure of the arc-shaped spring piece 9 elastic. Under the elastic action, the arc-shaped spring piece 9 can be deformed under the extrusion of an external force, and recover the deformation after the extrusion of the external force ends, so as to facilitate the installation and removal of the earmuffs 5 and the fixing clip 8, and the operation is simple and quick.

[0042] By providing the telescopic frame 3 and the fixing clip 8, the earmuffs 5 and the fixing clip 8 can cooperate in two states: when the earmuffs 5 and the fixing clips 8 at the bottom of the two sides of the helmet body 1 cooperate with each other and are fixed, the earmuffs 5 fit the ears of the user (such as Figures 1 to 3 As shown in the figure, the telescopic frame 3 is stretched to the outside of the ear to adapt to the position of the earmuff 5, and the block 6 is fixed with the fixing clips 8 at the bottom of both sides of the helmet body 1 to limit the earmuff 5, thereby achieving the effect of noise reduction; when the earmuff 5 is not needed, the earmuff 5 is separated from the fixing clip 8 and rotated and slid toward the back of the head, the earmuff 5 is fixed with the fixing clip 8 fixedly connected to the telescopic frame 3, and then the telescopic frame 3 is extended and retracted toward the position of the slider 7. At this time, the earmuff 5 fits the back of the user's head (as shown in the figure). Figures 4 to 5 As shown in the figure, as the earmuff 5 rotates from the ear to the back of the head, the free end of the telescopic frame 3 shrinks toward the center of the telescopic frame 3 to adapt to the position of the earmuff 5. At this time, the clamping block 6 cooperates with the fixing clip 6 on the telescopic frame 3 to fix the earmuff 5, thereby achieving a protective effect on the head. In actual operation, the user can adjust and fix the earmuff 5 with the above two states, and this fixing method is not only simple in structure and low in cost, but also highly efficient. More importantly, this fixing method will not cause damage to the ear and is suitable for users with different head shapes.

[0043] like Figures 2 to 7 As shown, the adjustment component includes a support bracket 10 fixedly connected to the bottom of the outer wall of the support frame 2, and warping portions 11 are provided at both ends of the support bracket 10. Limiting holes 12 are opened at the positions near the warping portions 11 at both ends of the support bracket 10, and an adjusting belt 13 is penetrated inside the limiting hole 12. The center of the outer wall of the adjusting belt 13 is fixedly connected with a uniformly distributed limiting block 14. The support bracket 10 is a curved arc structure, and a uniformly distributed lightweight groove 17 is penetrated on the support bracket 10. The edges of the lightweight groove 17 are all rounded. The inner wall size of the limiting hole 12 is larger than the outer wall size of the adjusting belt 13, and the outer wall size of the limiting block 14 is larger than the inner wall size of the limiting hole 12. Masks 15 are fixedly connected to both ends of the adjusting belt 13. The mask 15, the adjusting belt 13 and the limiting block 14 are an integrated structure, and filter elements 16 are connected to both sides of the mask 15.

[0044] The supporting frame 10 is fixedly connected to the bottom of the supporting frame 2, the telescopic frame 3 is fixedly connected to the supporting frame 2 and the telescopic frame 3 is close to the supporting frame 10, the supporting frame 2, the telescopic frame 3 and the supporting frame 10 are an integrated manufacturing structure, such a setting makes the processing technology of the three simpler during the production process, easier to be manufactured, and reduces the capital investment of the manufacturer, and the three are all made of ABS material, ABS (acrylonitrile-butadiene-styrene copolymer) is a common engineering plastic with the characteristics of high strength, impact resistance, and lightness. The supporting frame 2 is a curved structure that matches the curvature of the human head. The connection between the supporting frame 2 and the helmet body 1 is flush with the inner wall of the helmet body 1 to prevent compression damage to the head, and there is a certain distance between the top of the supporting frame 2 and the top of the inner wall of the helmet body 1, which is convenient for ventilation and can alleviate the high temperature state during summer operations to a certain extent.

[0045] The support frame 10 is a curved structure, and the curvature of the support frame 10 matches the curvature of the human neck, which improves the comfort of the user wearing the device and conforms to the ergonomic design. The two ends of the support frame 10 are provided with warping portions 11. By providing the warping portions 11 that bend outward at the two ends of the support frame 10, it is possible to prevent the two ends of the support frame 10 from compressing and damaging the human neck. Moreover, the cross section of the support frame 10 is also a wavy curved surface, and the top and bottom of the cross section have an outward curvature, which is also to reduce the compression and damage to the human neck at the edge of the support frame 10. The entire outer contour of the support frame 10 is rounded, making the contour of the support frame 10 more rounded and minimizing compression damage. In addition, a uniformly distributed lightweight groove 17 is provided at the center of the support frame 10, which can not only reduce the dead weight of the support frame 10 and improve its portability, but also the hollow lightweight groove 17 can ventilate and cool to a certain extent, improving the comfort in a high-temperature working environment.

[0046] By setting the support frame 2 and the support bracket 10, not only can the overall deadweight be dispersed to the head and neck, reducing the single pressure of the helmet on the head, but also the structural characteristics of the support frame 2 and the support bracket 10 are utilized to facilitate ventilation and cooling, thereby improving the wearing comfort during summer construction. The curvature of the support frame 2 and the support bracket 10 are consistent with the curvature of the human head and neck, and meet the requirements of ergonomic design. The curved surface shape of the support frame 10 and the setting of the warped edge 11 are also to reduce the compression damage to the human neck at the edge of the support frame 10, and the entire outer contour of the support frame 2 and the support bracket 10 is filleted to make the outer contour more rounded, thereby minimizing compression damage and improving wearing comfort.

[0047] The two ends of the support bracket 10 are provided with limiting holes 12, and an adjusting belt 13 is inserted between the limiting holes 12. The center of the adjusting belt 13 is fixedly connected with evenly distributed limiting blocks 14. The outer contour size of the limiting block 14 is larger than the inner wall size of the limiting hole 12. The limiting block 14 can pass through the limiting hole 12 by external force, and the limiting blocks 14 at different positions cooperate with the limiting holes 12 (such as Figure 7 As shown), to adjust the tightness of the mask 15, the adjustment belt 13, the mask 15 and the limit block 14 are an integrated manufacturing structure and are all made of silicone. The silicone material is not only soft and light and fits the skin, but also can be repeatedly cleaned and disinfected. Conveniently removable filter elements 16 are provided on both sides of the mask 15 to facilitate the replacement of the filter element 16. The structure and working principle of the silicone mask 15 and the conveniently removable filter element 16 are disclosed in the prior art and will not be described in detail here.

[0048] By setting an adjustment belt 13 and a limit block 14, the adjustment belt 13 passes through the limit holes 12 at both ends of the support bracket 10, and the adjustment belt 13 on the outside of the support bracket 10 is pulled by hand. The limit blocks 14 at different positions cooperate with the limit holes 12 to adjust the tightness of the mask 15 to ensure the wearing comfort of different groups of people. Not only does the support bracket 10 provide neck support for the entire helmet, but the mask 15 is also worn and fixed to prevent compression damage to the ears caused by wearing the mask 15.

[0049] The workflow of the technical solution provided by the present invention is as follows:

[0050] When in use, first adjust the mask 15 to the maximum looseness and retract the telescopic frame 3 to the shortest distance to facilitate wearing the helmet from top to bottom. When wearing the helmet on the head, make sure it covers the forehead and is about 1-2 cm away from the eyebrows. The helmet should be worn horizontally and cannot be tilted back or forward. Gently turn the head to ensure that there is no pressure or discomfort inside the helmet, then stretch both sides of the telescopic frame 3 outward, adjust the position of the earmuffs 5 and the ears, ensure that the earmuffs 5 completely wrap the ears and fit the ears to ensure the noise reduction effect. After adjusting the position of the earmuffs 5, fix the card block 6 with the fixing clip 8, and then wear the mask 15 in place, and adjust it by hand. The strap 13 is adjusted by using the limiting blocks 14 on the outside of the adjusting strap 13 to cooperate with the limiting holes 12 at both ends of the supporting frame 10 to adjust the tightness of the mask 15 to ensure the comfort of wearing. After ensuring that the helmet is fully worn, the strap of the helmet is pulled under the chin to ensure that the strap is moderately tight and will not get loose during wearing. When the earmuffs 5 are not needed, the earmuffs 5 are separated from the fixing clips 8 and rotated and slid toward the back of the head, the earmuffs 5 are fixed with the fixing clips 8 fixedly connected to the telescopic frame 3, and then the telescopic frame 3 is extended toward the position of the slider 7. At this time, the earmuffs 5 have a protective effect on the back of the user's head.

[0051] By setting the support frame 2 and the support bracket 10, not only can the overall deadweight be dispersed to the head and neck, reducing the single pressure of the helmet on the head, but also the structural characteristics of the support frame 2 and the support bracket 10 are utilized to facilitate ventilation and cooling, thereby improving the wearing comfort during summer construction. The curvature of the support frame 2 and the support bracket 10 are consistent with the curvature of the human head and neck, and meet the requirements of ergonomic design. The curved surface shape of the support frame 10 and the setting of the warped edge 11 are also to reduce the compression damage to the human neck at the edge of the support frame 10, and the entire outer contour of the support frame 2 and the support bracket 10 is filleted to make the outer contour more rounded, thereby minimizing compression damage and improving wearing comfort.

[0052] By setting the telescopic frame 3 and the supporting frame 10, the telescopic frame 3 and the supporting frame 10 are respectively arranged on the ears and the back of the neck of the user. The telescopic frame 3 can not only provide support and fixation for the earmuffs 5, but also when there is no need for noise reduction protection for the ears, the state of the earmuffs 5 can be changed by the telescopic frame 3, so as to protect the exposed back of the head, and the earmuffs 5 can be supported by the back of the neck to reduce the load on the head; the supporting frame 10 can not only quickly fix the mask 15, but also facilitate the adjustment of the tightness of the mask 15 to adapt to users with different head circumferences. Compared with directly hanging the mask 15 on the ears, the supporting frame 10 can avoid certain pressure and discomfort on the ears, thereby improving the wearing comfort.

[0053] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multifunctional protective helmet for engineering construction, comprising a helmet body, characterized in that: The bottom end of the inner wall of the helmet body is fixedly connected to a support frame, and the outer wall of the support frame is fixedly connected to a rotating assembly near the bottom, the rotating assembly is used to assist in changing the position of the earmuffs, and the rotating assembly is connected to the support frame; An adjustment component is used to adjust the tightness of the mask, and the adjustment component is connected to the support frame.

2. The multifunctional protective helmet for engineering construction according to claim 1, characterized in that: The rotating assembly includes a telescopic frame fixedly connected to the outer wall of the support frame, the telescopic frame is fixedly connected to fixing clips on both sides close to the support frame and on both sides of the bottom of the helmet body, the two ends of the telescopic frame are slidably connected to earmuffs, the top of the earmuff is fixedly connected to a clamping block, and the top of the earmuff is clamped with the fixing clip through the clamping block.

3. The multifunctional protective helmet for engineering construction according to claim 2, characterized in that: Both ends of the telescopic frame are provided with sliding grooves, and a sliding block is fixedly connected to the outer wall of the earmuff at a position corresponding to the sliding groove, and the size of the outer wall of the sliding block is adapted to the size of the inner wall of the sliding groove.

4. The multifunctional protective helmet for engineering construction according to claim 2, characterized in that: The inner wall of the fixing clamp is adapted to the outer wall size of the clamping block, and arc-shaped spring pieces are fixedly connected to the centers of both sides of the inner wall of the fixing clamp, and the length of the arc-shaped spring pieces is smaller than the length of the fixing clamp.

5. The multifunctional protective helmet for engineering construction according to claim 4, characterized in that: The arc-shaped spring pieces are curved elastic structures, and the spacing between the arc-shaped spring pieces distributed opposite to each other is smaller than the outer wall size of the block.

6. The multifunctional protective helmet for engineering construction according to claim 1, characterized in that: The adjustment component includes a support bracket fixedly connected to the bottom of the outer wall of the support frame, and warped edges are provided at both ends of the support bracket. Limiting holes are provided at positions close to the warped edges at both ends of the support bracket, and an adjustment belt passes through the limiting hole. The center of the outer wall of the adjusting belt is fixedly connected with evenly distributed limiting blocks.

7. The multifunctional protective helmet for engineering construction according to claim 6, characterized in that: The support frame is a curved arc structure, and is penetrated by evenly distributed lightweight grooves, and the edges of the lightweight grooves are all rounded.

8. The multifunctional protective helmet for engineering construction according to claim 6, characterized in that: The inner wall size of the limiting hole is larger than the outer wall size of the adjusting belt, and the outer wall size of the limiting block is larger than the inner wall size of the limiting hole.

9. The multifunctional protective helmet for engineering construction according to claim 6, characterized in that: The two ends of the adjustment belt are fixedly connected with masks, the mask, the adjustment belt and the limit block are an integrated structure, and the two sides of the mask are connected with filter elements.

10. The multifunctional protective helmet for engineering construction according to claim 1, characterized in that: The support frame is a curved arc structure, and the support frame, the telescopic frame and the supporting frame are an integrated structure.

Images