Dustproof and noise reduction helmet and adjusting method thereof

Abstract

The present application relates to the technical field of noise reduction helmet, specifically relates to a dustproof noise reduction helmet, and specifically relates to a dustproof noise reduction helmet adjusting method, including helmet body, the front side of the helmet body is equipped with first dustproof goggles, both sides of the helmet body are equipped with noise reduction earmuffs, the outside of the first dustproof goggles is equipped with second dustproof goggles that can be vertically extended downward, both sides of the helmet body are respectively equipped with adjusting frame for connecting the noise reduction earmuffs, the noise reduction earmuffs are equipped with earmuff shell and sponge cover, the earmuff shell is connected with the adjusting frame, the sponge cover is arranged on the inside of the earmuff shell, the inside of the earmuff shell is provided with noise reduction adjusting mechanism that can manually adjust the noise reduction degree, the first dustproof goggles and the second dustproof goggles are matched to increase the dustproof area, and the noise reduction adjusting mechanism arranged in the noise reduction earmuffs is used to adjust the noise reduction degree, so as to ensure the safety of the rider.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of noise reduction helmets, in particular to a dustproof noise reduction helmet, and further particularly to a dustproof noise reduction helmet adjusting method. BACKGROUND

[0002] In cycling sports, helmets are key equipment for protecting the safety of cyclists' heads, and the optimization of their performance is directly related to the safety and comfort of cyclists. With the diversification of cyclists' functional needs for helmets, dustproof noise reduction helmets have gradually become the new darling of the market. However, while pursuing the effects of dustproof noise reduction, cyclists also need to consider the weight, breathability, wearing comfort, and adjustability of the noise reduction function of the helmet to ensure safety and comfort in different cycling environments.

[0003] Chinese Publication No. CN213096391U discloses a noise reduction helmet, which includes a helmet body and a noise reduction ear cover. The noise reduction ear cover is arranged near the ears of the wearer on both sides of the helmet body. A through hole is arranged in the center of the noise reduction ear cover, and a filter cotton is arranged inside the through hole near the inner side. A slot is arranged inside the noise reduction ear cover along the vertical direction and penetrates the bottom of the noise reduction ear cover. A plugboard is inserted into the slot. A filter cotton is arranged in the center of the plugboard, and the overall shape of the filter cotton is circular. Two elastic locks are arranged symmetrically inside the plugboard and are inserted into the elastic lock grooves arranged on both sides of the slot. A return spring is arranged between the two elastic locks. The noise reduction helmet provided by the patent not only effectively reduces external noise, but also uses filter cotton that can be repeatedly cleaned and replaced, ensuring the cleanliness of the filter cotton and effectively improving the service life of the sound insulation cotton.

[0004] However, the above-mentioned patent can effectively isolate external noise, but the noise reduction degree cannot be adjusted, which brings inconvenience in the cycling process. For example, in a quiet cycling environment, cyclists need to perceive external sounds such as traffic conditions and pedestrian cues to ensure cycling safety, while traditional ear covers may completely isolate these sounds, increasing the risk of cycling. In addition, as an important part of the cycling helmet, the dustproof goggles have a fixed dustproof range, which cannot be adjusted according to the actual needs of the user. During cycling, cyclists may need to adjust the dustproof range of the dustproof goggles according to different road conditions and weather conditions to achieve the best dustproof effect. However, the dustproof goggles in the prior art mostly lack this adjusting function, resulting in limited dustproof effect and failing to meet the diversified needs of cyclists. Therefore, it is necessary to provide a cycling helmet that is both lightweight and has adjustable noise reduction function and dustproof range. SUMMARY

[0005] To solve the above problems, the application provides a dustproof and noise reduction helmet and an adjusting method thereof, which increases the dustproof area by cooperation of the first and second dustproof goggles and adjusts the noise reduction degree by a noise reduction adjusting mechanism arranged in the noise reduction earmuff, thereby ensuring the safety of the rider.

[0006] To solve the above problems, the application provides a dustproof and noise reduction helmet and an adjusting method thereof, which increases the dustproof area by cooperation of the first and second dustproof goggles and adjusts the noise reduction degree by a noise reduction adjusting mechanism arranged in the noise reduction earmuff, thereby ensuring the safety of the rider.

[0007] Preferably, the noise reduction adjusting mechanism comprises a partition plate, an adjusting sleeve rod and an extension part, the partition plate is arranged in the inside of the earmuff shell, the inside of the earmuff shell is divided into a first cavity and a second cavity by the partition plate, a circular through hole is arranged at the center of the partition plate, the adjusting sleeve rod is arranged in the inside of the earmuff shell and penetrates the circular through hole, one end of the adjusting sleeve rod extends to the direction of the sponge cover and is connected with a framework, the framework is fixedly arranged on the inner wall of the earmuff shell, the other end of the adjusting sleeve rod extends out of the side of the earmuff shell away from the sponge cover, the circular through hole at the center of the partition plate is surrounded by a groove, two movable baffles are arranged in the groove and can move to the center of the circular through hole, and the extension part is sleeved on the adjusting sleeve rod along the axis of the adjusting sleeve rod, when the extension part moves to the two movable baffles and contacts them, the two movable baffles are expanded under the pushing of the extension part and the first cavity and the second cavity are connected, and when the extension part is not moved, the extension part cooperates with the two movable baffles and closes the circular through hole on the partition plate.

[0008] Preferably, the extension part is integrally formed by a front section and a rear section, the front section faces the movable baffles, the front section is a hemispherical structure, the rear section is a cylindrical structure, the two movable baffles are respectively provided with a front section surface and a rear section surface, when the extension part is not moved, the front section surfaces on the two movable baffles are attached to the front section, when the extension part moves to the two movable baffles and contacts them, the rear section surfaces on the two movable baffles are attached to the rear section, and in the contacting state, the two movable baffles are away from each other and form two through holes under the pushing of the extension part.

[0009] Preferably, the outside of the rear section is inlaid with a first magnet attracting accessory around the circumferential direction of the rear section, and the rear section surface of the movable baffle is inlaid with a first ferrous attracting accessory capable of magnetically attracting the first magnet attracting accessory.

[0010] Preferably, the two movable baffles are respectively provided with first sleeves on the sides away from each other, the deep grooves of the partition plates are provided with second sleeves capable of telescopically connecting with the first sleeves, and springs are sleeved between the first sleeves and the second sleeves.

[0011] Preferably, the adjusting sleeve rod comprises an adjusting sleeve, a screw rod, a screw cap and a knob, one end of the adjusting sleeve is connected with the framework, the other end of the adjusting sleeve penetrates through the ear cover shell and extends outward away from the side of the sponge cover, the expansion part is provided with perforations for avoiding and closely fitting the outer part of the adjusting sleeve, the screw rod is arranged inside the adjusting sleeve along the axis of the adjusting sleeve, one end of the screw rod penetrates through the adjusting sleeve and extends outward away from the end of the framework, the other end of the screw rod is rotationally connected with the inner end of the adjusting sleeve close to the framework, the knob is arranged on the end of the screw rod extending outward, the screw cap is threadedly connected outside the screw rod, the peripheral surface of the screw cap is closely fitted with the inner wall of the adjusting sleeve, the peripheral surface of the screw cap is provided with a radially extending connecting block, one end of the connecting block is connected with the inner wall of the perforation of the expansion part, and the adjusting sleeve is provided with a strip-shaped through hole for the connecting block to move along the axis of the adjusting sleeve.

[0012] Preferably, one of the two movable baffles is provided with a second iron magnetic attraction part on the side close to the other movable baffle, and the other movable baffle is provided with a second magnet attraction part capable of magnetically attracting the second iron magnetic attraction part.

[0013] Preferably, the outer edges of the two sides of the second dustproof goggles are provided with outwardly extending pressing parts, the inner side walls of the second dustproof goggles close to the first dustproof goggles are symmetrically provided with slide blocks, and the vertical surfaces of the first dustproof goggles close to the second dustproof goggles are provided with strip-shaped sliding grooves for the vertical movement of the slide blocks.

[0014] Preferably, the upper edges of the two sides of the first dustproof goggles are symmetrically provided with clamping columns, and the upper edges of the two sides of the second dustproof goggles are provided with buckles for clamping cooperation with the clamping columns.

[0015] A dustproof and noise reduction helmet adjusting method, applied to a dustproof and noise reduction helmet, comprising the following steps:

[0016] S1, the user wears the helmet body on the head, and can extend the second dustproof goggles as needed, when needing to extend, the second dustproof goggles are vertically extended downward to provide more comprehensive dustproof protection and increase the dustproof area.

[0017] S2, when wearing the helmet body, the user stably fixes the noise reduction ear cover on both sides of the head through the connecting frame.

[0018] S3, when wearing the noise reduction earmuffs, the user can manually adjust the noise reduction degree through the noise reduction adjustment mechanism, for example, in a very noisy environment, the user can adjust the noise reduction degree to the highest to maximize the noise interference, and in a relatively quiet environment, the noise reduction degree can be reduced to keep the perception of the surrounding environment, and ensure the safety of riding.

[0019] S4, when it is necessary to adjust the noise reduction degree of the earmuffs, the user drives the extension part to move by manually controlling the one end of the adjusting sleeve rod to extend, when the extension part moves to the position of the two movable baffles, the extension part pushes the two movable baffles to expand, and the opening of the circular through hole is enlarged to allow more sound to enter the inside of the earmuffs, so that the noise reduction effect is reduced, so that the user can better perceive the external sound.

[0020] S5, when it is necessary to increase the noise reduction degree of the earmuffs, the extension part cooperates with the two movable baffles to jointly close the circular through hole on the baffle, and the external noise is effectively blocked outside the earmuffs, so that a more quiet and comfortable environment is provided for the user.

[0021] S6, when it is necessary to reduce the noise reduction degree of the earmuffs, the extension part is moved by operating the adjusting sleeve rod, when the extension part moves forward and contacts the two movable baffles, the extension part pushes the movable baffles to move to the deep part of the empty groove, in this state, the front part gradually moves away from the front end face of the movable baffle, and the rear end part gradually approaches the rear end face of the movable baffle and contacts it, at this time, the two movable baffles are separated from each other and form two through openings, and more sound can enter the inside of the earmuffs through the opening of the two through openings, so that the noise reduction effect is reduced, and the user can better perceive the external sound.

[0022] The beneficial effects of the present application compared with the prior art are:

[0023] 1、The first dustproof goggles mounted on the front side of the helmet body can effectively block dust, splashes and the like from the front, and the second dustproof goggles vertically downwardly extendable are further arranged outside the first dustproof goggles, so that more comprehensive dustproof protection can be provided when needed, and when a windy and dusty environment or a more dusty environment is encountered, the user can extend the second dustproof goggles downward to increase the dustproof area.

[0024] 2、The noise reduction adjustment mechanism arranged in the inside of the earmuff shell can adjust the noise reduction degree according to the needs of the user, for example, in a very noisy environment, the user can adjust the noise reduction degree to the highest to maximize the noise interference, and in a relatively quiet environment, the noise reduction degree can be reduced to keep the perception of the surrounding environment, and ensure the safety of riding.

[0025] 3、The application divides the ear cover shell into two independent first cavities and second cavities by the partition plate, which isolates and reduces the transmission of external noise. When the user needs to adjust the noise reduction degree of the ear cover, the user drives the expansion part to move by manually controlling the one end of the adjusting sleeve rod extending out, and when the expansion part moves to the position of the two movable baffles, the expansion part will push the two movable baffles to expand. In this way, the opening of the circular through hole will be enlarged, allowing more sound to enter the inside of the ear cover, thereby reducing the noise reduction effect, so that the user can better perceive the external sound. When the expansion part is not moved, the expansion part will cooperate with the two movable baffles to close the circular through hole on the partition plate. In this way, the external noise is effectively blocked outside the ear cover, providing a more quiet and comfortable environment for the user. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a three-dimensional structure state of a dustproof and noise reduction helmet Figure 1 .

[0027] Figure 2 It is Figure 1 the enlarged view of A in FIG.

[0028] Figure 3 It is a three-dimensional structure state of a dustproof and noise reduction helmet Figure 2 .

[0029] Figure 4 It is Figure 3 the enlarged view of B in FIG.

[0030] Figure 5 It is a three-dimensional structure state of a dustproof and noise reduction helmet

[0031] Figure 6 It is a structure sectional view of a dustproof and noise reduction helmet

[0032] Figure 7 It is Figure 6 the enlarged view of C in FIG.

[0033] Figure 8 It is a state of a noise reduction ear cover of a dustproof and noise reduction helmet Figure 1 .

[0034] Figure 9 It is a state of a noise reduction ear cover of a dustproof and noise reduction helmet Figure 2 .

[0035] Figure 10 It is a partial three-dimensional structure sectional view of a noise reduction ear cover of a dustproof and noise reduction helmet

[0036] Figure 11 It is a partial three-dimensional structure sectional view of a noise reduction ear cover of a dustproof and noise reduction helmet

[0037] Figure 12 is a partial sectional view of a noise reduction earmuff of a dustproof noise reduction helmet.

[0038] The figure marks are: 1, helmet body; 2, first dustproof goggles; 21, strip-shaped sliding groove; 22, rubber strip; 23, clamping column; 3, noise reduction earmuff; 31, earmuff shell; 311, dust cover; 32, sponge cover; 33, first sound-absorbing cotton; 34, first cavity; 35, second cavity; 4, second dustproof goggles; 41, pressing part; 42, sliding block; 43, buckle; 5, adjusting frame; 6, noise reduction adjusting mechanism; 61, partition; 611, circular through hole; 612, empty slot; 613, second through hole; 614, second sound-absorbing cotton; 615, vertical plate; 616, limiting slot; 617, limiting sliding block; 62, adjusting sleeve rod; 621, adjusting sleeve; 6211, strip-shaped through hole; 622, screw rod; 623, nut; 6231, connecting block; 624, knob; 63, expansion part; 631, front section; 632, rear section; 6321, first magnet attracting accessory; 64, framework; 65, movable baffle; 651, first through hole; 652, front section surface; 653, rear section surface; 6531, first iron attracting accessory; 654, through hole; 655, second iron attracting accessory; 656, second magnet attracting accessory; 66, first sleeve; 67, second sleeve; 671, spring. DETAILED DESCRIPTION

[0039] In order to further understand the features, technical means and specific purposes and functions of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments.

[0040] Referring to Figures 1 to 12 As shown in the figure: a dustproof noise reduction helmet, including helmet body 1, the front side of the helmet body 1 is provided with first dustproof goggles 2, both sides of the helmet body 1 are provided with noise reduction earmuffs 3, the outside of the first dustproof goggles 2 is provided with vertically downwardly extendable second dustproof goggles 4, both sides of the helmet body 1 are respectively provided with adjusting frames 5 for connecting the noise reduction earmuffs 3, the noise reduction earmuffs 3 are provided with earmuff shells 31 and sponge covers 32, the earmuff shells 31 are connected with the adjusting frames 5, the sponge covers 32 are arranged on the inner side of the earmuff shells 31, the inside of the earmuff shells 31 is provided with noise reduction adjusting mechanisms 6 capable of manually adjusting the noise reduction degree.

[0041] The first dustproof goggles 2 can effectively block dust, splashes and the like from the front. The first dustproof goggles 2 are externally provided with second dustproof goggles 4 that can be vertically extended downward to provide more comprehensive dustproof protection when needed. When encountering an environment with relatively large wind and sand or a large amount of dust, the user can extend the second dustproof goggles 4 downward to increase the dustproof area. The first dustproof goggles 2 and the second dustproof goggles 4 are both made of fog-proof and dust-proof plastic glass material.

[0042] When wearing the helmet body 1, the user can stably fix the noise reduction earmuffs 3 on both sides of the head through the connecting frame. The connecting frame is mainly used to connect the noise reduction earmuffs 3 to the helmet. The connecting frame can be a support with adjustable length and made of metal or plastic. The application will not be described based on the connecting frame. The inside of the earmuff shell 31 is provided with a noise reduction adjustment mechanism 6 that can manually adjust the noise reduction degree. The noise reduction degree can be adjusted according to the needs of the user. For example, in an extremely noisy environment, the user can adjust the noise reduction degree to the highest to minimize noise interference. In a relatively quiet environment, the noise reduction degree can be reduced to maintain the perception of the surrounding environment and ensure the safety of riding.

[0043] A cutout is formed on the side of the earmuff shell 31 away from the sponge cover 32. The cutout is provided with a dust cover 311. When the user reduces the noise reduction degree, the cutout can transmit sound to the inside of the earmuff shell 31, further maintaining the perception of the surrounding environment. The dust cover 311 is provided to prevent dust from entering the inside of the earmuff shell 31.

[0044] The earmuff shell 31 is provided with a first interlayer. The inside of the first interlayer is filled with first sound-absorbing cotton 33, further increasing the noise reduction effect.

[0045] Reference Figures 6 to 9As shown: the noise reduction adjusting mechanism 6 includes a partition plate 61, an adjusting sleeve rod 62 and an expansion part 63, the partition plate 61 is arranged in the inside of the earmuff shell 31, the partition plate 61 divides the inside of the earmuff shell 31 into a first cavity 34 and a second cavity 35, a circular through hole 611 is arranged in the center of the partition plate 61, the adjusting sleeve rod 62 is arranged in the inside of the earmuff shell 31 through the circular through hole 611, one end of the adjusting sleeve rod 62 extends to the direction of the sponge cover 32 and is connected with a framework 64, the framework 64 is fixedly arranged on the inner wall of the earmuff shell 31, the other end of the adjusting sleeve rod 62 extends out from the side of the earmuff shell 31 away from the sponge cover 32, the circular through hole 611 in the center of the partition plate 61 is provided with a hollow groove 612, two movable baffles 65 which can move to the center of the circular through hole 611 are arranged in the hollow groove 612, the expansion part 63 is sleeved on the adjusting sleeve rod 62 along the axis of the adjusting sleeve rod 62, when the expansion part 63 moves and contacts the two movable baffles 65, at this time, the two movable baffles 65 are unfolded under the pushing of the expansion part 63, and the first cavity 34 and the second cavity 35 are communicated, when the expansion part 63 is not moved, the expansion part 63 cooperates with the two movable baffles 65 to close the circular through hole 611 on the partition plate 61.

[0046] The inside of the earmuff shell 31 is divided into two independent first cavity 34 and second cavity 35 by the partition plate 61, which isolates and reduces the transmission of external noise. When the noise reduction degree of the earmuff needs to be adjusted, the user manually controls the end of the adjusting sleeve rod 62 to drive the expansion part 63 to move, when the expansion part 63 moves to the position of the two movable baffles 65, the expansion part 63 will push the two movable baffles 65 to unfold. In this way, the opening of the circular through hole 611 will be enlarged, allowing more sound to enter the inside of the earmuff, thereby reducing the noise reduction effect, so that the user can better perceive the external sound. When the expansion part 63 is not moved, the expansion part 63 cooperates with the two movable baffles 65 to close the circular through hole 611 on the partition plate 61. The external noise is effectively blocked outside the earmuff, providing a more quiet and comfortable environment for the user.

[0047] The side of the movable baffle 65 away from the circular through hole 611 is provided with a first through hole 651, the partition plate 61 is provided with a second through hole 613 corresponding to the first through hole 651, when the movable baffle 65 is pushed by the expansion part 63 to move to the deepest position, the first through hole 651 is connected with the second through hole 613, at this time, the first through hole 651 and the second through hole 613 are communicated and form a channel, the channel is communicated with the first cavity 34 and the second cavity 35 respectively, so that more sound can enter the first cavity 34 inside the earmuff, the first cavity 34 is close to the sponge cover 32, so that the user can better perceive the external sound, when the two movable baffles 65 are close, the second through hole 613 can be closed by the side wall of the movable baffle 65, blocking the transmission of external noise.

[0048] The partition plate 61 is provided with a second interlayer, and the second interlayer is filled with a second sound-absorbing cotton 614, thereby further increasing the noise reduction effect.

[0049] Referring to Figures 6 to 9 As shown: the extension part 63 is integrally formed by a front section 631 and a rear section 632, the front section 631 faces the movable baffle 65, the front section 631 is a hemispherical structure, the rear section 632 is a cylindrical structure, the two movable baffles 65 are respectively provided with a front section surface 652 and a rear section surface 653, the front section surface 652 faces the extension part 63, when the extension part 63 is in a non-moving state, the front section surface 652 on the two movable baffles 65 is in close contact with the front section 631, when the extension part 63 moves and contacts the two movable baffles 65, the rear section surface 653 of the two movable baffles 65 is in close contact with the rear section 632, in this contact state, the two movable baffles 65 are pushed away from each other by the extension part 63 and form two openings 654.

[0050] The front section 631 is a hemispherical structure, so that the front section 631 can be in good contact with the front section surface 652 of the movable baffle 65, thereby effectively closing the circular through hole 611 on the partition plate 61 and reducing the entry of external noise. When the extension part 63 is not moving, the front section surface 652 of the two movable baffles 65 is in close contact with the surface of the front section 631, thereby jointly closing the circular through hole 611 on the partition plate 61, at this time, the two movable baffles 65 are in close contact, effectively blocking the entry of external noise. When the user needs to adjust the noise reduction degree, the extension part 63 is moved by operating the adjusting sleeve rod 62, when the extension part 63 moves forward and contacts the two movable baffles 65, the extension part 63 pushes the movable baffles 65 to move to the deep part of the air slot 612, in this state, the front section 631 gradually moves away from the front end surface 652 of the movable baffle 65, while the rear section 632 gradually approaches the rear section surface 653 of the movable baffle 65 and contacts it, at this time, the two movable baffles 65 are separated from each other and form two openings 654, the opening of the two openings 654 allows more sound to enter the inside of the earmuff, thereby reducing the noise reduction effect, so that the user can better perceive the external sound.

[0051] Referring to Figures 6 to 9 As shown: the outer part of the rear section 632 is provided with a first magnet suction accessory 6321 around the circumferential direction of itself, and the rear section surface 653 of the movable baffle 65 is provided with a first ferrous suction accessory 6531 capable of being magnetically attracted to the first magnet suction accessory 6321.

[0052] When the extension part 63 moves forward and contacts the movable baffle 65, the magnetic attraction force between the first iron attraction part 6531 and the first magnet attraction part 6321 will immediately act, preventing the moving tendency caused by external factors such as vibration, ensuring that the extension part 63 can stably stay in the desired position, and the user can adjust the noise reduction effect of the helmet by adjusting the position of the extension part 63 as needed, without worrying about the extension part 63 moving by itself.

[0053] Referring to Figures 10 to 12 As shown: two movable baffles 65 are respectively provided with first sleeves 66 on the sides away from each other, the deep grooves of the partition plate 61 are provided with second sleeves 67 capable of telescopic sleeving with the first sleeves 66, and springs 671 are sleeved between the first sleeves 66 and the second sleeves 67.

[0054] When it is necessary to adjust the noise reduction effect, the user operates the adjusting sleeve rod 62 to drive the extension part 63 to move and push the two movable baffles 65 to move, and in this process, the first sleeves 66 will perform telescopic movement in the second sleeves 67, and at the same time, the springs 671 will be deformed.

[0055] Specifically, the spring 671 acts as an elastic element, which has two functions here: first, it provides necessary elastic support for the movement of the movable baffle 65, so that the movable baffle 65 can move smoothly when subjected to external force, and in this state, the two movable baffles 65 are away from each other; second, after the external force disappears, the spring 671 can push the movable baffle 65 to return to the original position, and in this state, the two movable baffles 65 are close to each other. Through the cooperation of the first sleeve 66, the second sleeve 67 and the spring 671, the stable connection between the movable baffle 65 and the partition plate 61 is realized.

[0056] The vertical plates 615 are symmetrically arranged on both sides of the movable baffle 65 in the inner empty grooves 612, the side adjacent to the two vertical plates 615 is provided with a limiting groove 616, and the two sides of the movable baffle 65 are provided with limiting sliding blocks 617 capable of limiting movement in the corresponding two limiting grooves 616. During the movement of the movable baffle 65, through the cooperation of the limiting sliding block 617 and the limiting groove 616, the movable baffle 65 can stably move.

[0057] Referring to Figures 7 to 10As shown: the adjusting sleeve rod 62 includes an adjusting sleeve 621, a screw rod 622, a nut 623 and a knob 624, one end of the adjusting sleeve 621 is connected with the framework 64, the other end of the adjusting sleeve 621 extends outwardly through the ear cover shell 31 away from the sponge cover 32, the extension part 63 is provided with a perforation for avoiding and closely fitting the outside of the adjusting sleeve 621, the screw rod 622 is arranged inside the adjusting sleeve 621 along the axis of the adjusting sleeve 621, one end of the screw rod 622 extends outwardly through the adjusting sleeve 621 away from the framework 64, the other end of the screw rod 622 is rotationally connected with the inside end of the adjusting sleeve 621 close to the framework 64, the knob 624 is arranged on the extended end of the screw rod 622, the nut 623 is threadedly connected outside the screw rod 622, the peripheral surface of the nut 623 is closely fitted with the inner wall of the adjusting sleeve 621, the peripheral surface of the nut 623 is provided with a radially extending connecting block 6231, one end of the connecting block 6231 is connected with the inner wall of the perforation of the extension part 63, the adjusting sleeve 621 is provided with a strip-shaped perforation 6211 for moving the connecting block 6231 along the axis of the adjusting sleeve 621.

[0058] When it is needed to drive the extension part 63 to move, the user only needs to operate the knob 624 to drive the screw rod 622 to rotate, in the process of rotating the screw rod 622, the connecting block 6231 and the strip-shaped perforation 6211 cooperate to limit the movement of the nut 623, the limiting effect makes the nut 623 only move along the axis direction of the screw rod 622, but not rotate with the screw rod 622, so that the extension part 63 can smoothly move along the axis of the adjusting sleeve 621 and cooperate with the two movable baffles 65.

[0059] Referring to Figure 12 As shown: one of the two movable baffles 65 is provided with a second iron suction accessory 655 close to the side of the other movable baffle 65, and the other movable baffle 65 is provided with a second magnet suction accessory 656 capable of being magnetically attracted to the second iron suction accessory 655.

[0060] When the two movable baffles 65 need to be closed, the movable baffle 65 with the second iron suction accessory 655 approaches the movable baffle 65 with the second magnet suction accessory 656, due to the magnetic attraction, the second iron suction accessory 655 and the second magnet suction accessory 656 are quickly and firmly attracted together, so that the two movable baffles 65 are tightly closed.

[0061] Referring to Figures 1 to 4 As shown: the second dustproof goggles 4 are provided with outwardly extending pressing parts 41 on the upper edges of the two sides, the second dustproof goggles 4 are symmetrically provided with slide blocks 42 on the inner side walls close to the first dustproof goggles 2, and the first dustproof goggles 2 are provided with strip-shaped sliding grooves 21 for vertically moving the slide blocks 42 on the vertical surfaces close to the second dustproof goggles 4.

[0062] When it is needed to extend the second dustproof goggles 4 downward, the user only needs to press the pressing part 41 to move the second dustproof goggles 4 downward, and when the second dustproof goggles 4 move downward, the sliding block 42 provided on the second dustproof goggles 4 moves vertically along the corresponding strip-shaped sliding groove 21 on the first dustproof goggles 2, the strip-shaped sliding groove 21 does not penetrate the lower side of the first dustproof goggles 2, so when the sliding block moves to the lowest position of the strip-shaped sliding groove 21 and abuts against one end inside the strip-shaped sliding groove 21, the second dustproof goggles 4 is prevented from being separated from the first dustproof goggles 2. The material of the sliding block 42 is rubber, and when the sliding block 42 moves along the strip-shaped sliding groove 21 and moves to the required position, since the sliding block 42 is made of rubber, the contact area between the sliding block 42 and the inner wall of the strip-shaped sliding groove 21 is increased, so that the sliding block 42 will not move along the strip-shaped sliding groove 21 without external force. The lower side of the first dustproof goggles 2 is provided with a rubber strip 22 capable of contacting the inner side wall of the second dustproof goggles 4, and when the second dustproof goggles 4 is extended to the lowest position, the rubber strip 22 can abut against the inner side wall of the second dustproof goggles 4, which not only supports the second dustproof goggles 4, but also has a certain buffering effect, so that the second dustproof goggles 4 can stably be in the extended state and avoid shaking when the second dustproof goggles 4 is extended and used.

[0063] Referring to Figures 1 to 4 As shown in the figure: the upper edges of the two sides of the first dustproof goggles 2 are symmetrically provided with clamping columns 23, and the upper edges of the two sides of the second dustproof goggles 4 are provided with buckles 43 matched with the clamping columns 23.

[0064] When the user does not extend the second dustproof goggles 4, the clamping columns 23 on the first dustproof goggles 2 are matched with the buckles 43 on the second dustproof goggles 4, so that the first dustproof goggles 2 and the second dustproof goggles 4 are connected, and at this time the first dustproof goggles 2 and the second dustproof goggles 4 form an integral whole. The buckle 43 is of elastic structure, and can tightly clamp the clamping column 23 when the first dustproof goggles 2 and the second dustproof goggles 4 are clamped, so as to avoid separation of the first dustproof goggles 2 and the second dustproof goggles 4 when connected.

[0065] Referring to Figures 1 to 12 As shown in the figure: a method for adjusting a dustproof and noise reduction helmet, applied to a dustproof and noise reduction helmet, comprising the following steps:

[0066] S1, the user wears the helmet body 1 on the head, and can extend the second dustproof goggles 4 as needed, and when it is needed to extend, the second dustproof goggles 4 is extended vertically downward to provide more comprehensive dustproof protection and increase the dustproof area.

[0067] S2, when wearing the helmet body 1, the user stably fixes the noise reduction ear cover 3 on the two sides of the head through the connecting frame.

[0068] S3、When wearing the noise reduction earmuffs 3, the user can manually adjust the noise reduction degree through the noise reduction adjustment mechanism 6, for example, in a very noisy environment, the user can adjust the noise reduction degree to the highest to maximize the reduction of noise interference, and in a relatively quiet environment, the noise reduction degree can be reduced to maintain the perception of the surrounding environment and ensure the safety of riding.

[0069] S4、When it is necessary to adjust the noise reduction degree of the earmuffs, the user moves the extension part 63 by manually controlling the end of the adjusting sleeve rod 62 to extend, when the extension part 63 moves to the position of the two movable baffles 65, the extension part 63 will push the two movable baffles 65 to expand, the opening of the circular through hole 611 will be enlarged, allowing more sound to enter the inside of the earmuffs, thereby reducing the noise reduction effect, so that the user can better perceive the external sound.

[0070] S5、When it is necessary to increase the noise reduction degree of the earmuffs, the extension part 63 cooperates with the two movable baffles 65 to jointly close the circular through hole 611 on the baffle 61, and the external noise is effectively blocked outside the earmuffs, providing a more quiet and comfortable environment for the user.

[0071] S6、When it is necessary to reduce the noise reduction degree of the earmuffs, the extension part 63 is moved by operating the adjusting sleeve rod 62, when the extension part 63 moves forward and contacts the two movable baffles 65, the extension part 63 will push the movable baffles 65 to move to the deep part of the empty slot 612, in this state, the front section 631 gradually moves away from the front end surface of the movable baffle 65, and the rear end part gradually approaches the rear end surface of the movable baffle 65 and contacts it, at this time, the two movable baffles 65 will be separated from each other and form two through openings 654, through the opening of the two through openings 654, more sound can enter the inside of the earmuffs, thereby reducing the noise reduction effect, so that the user can better perceive the external sound.

[0072] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A dustproof and noise reduction helmet, comprising a helmet body (1), a first dustproof goggles (2) is installed on the front side of the helmet body (1), and a noise reduction earmuff (3) is installed on both sides of the helmet body (1), characterized in that, The first dustproof goggles (2) are externally provided with the second dustproof goggles (4) which can be vertically extended downward, the helmet body (1) is respectively provided with the adjusting frame (5) for connecting the noise reduction earmuffs (3) on both sides, the noise reduction earmuffs (3) are provided with the earmuff shell (31) and the sponge cover (32), the earmuff shell (31) is connected with the adjusting frame (5), the sponge cover (32) is arranged on the inner side of the earmuff shell (31), and the inside of the earmuff shell (31) is provided with the noise reduction adjusting mechanism (6) which can manually adjust the noise reduction degree; The noise reduction adjusting mechanism (6) comprises a partition plate (61), an adjusting sleeve rod (62) and an expansion part (63), the partition plate (61) is arranged in the inside of the earmuff shell (31), the partition plate (61) divides the inside of the earmuff shell (31) into a first cavity (34) and a second cavity (35), a circular through hole (611) is arranged at the center of the partition plate (61) and penetrates the two surfaces of the partition plate (61), the adjusting sleeve rod (62) is arranged in the inside of the earmuff shell (31) and penetrates the circular through hole (611), one end of the adjusting sleeve rod (62) extends to the direction of the sponge cover (32) and is connected with a framework (64), the framework (64) is fixedly arranged on the inner wall of the earmuff shell (31), the other end of the adjusting sleeve rod (62) extends out from the side of the earmuff shell (31) away from the sponge cover (32), the circular through hole (611) at the center of the partition plate (61) is provided with a hollow groove (612), two movable baffles (65) which can move to the center of the circular through hole (611) are arranged in the hollow groove (612), and the expansion part (63) is slidably sleeved on the adjusting sleeve rod (62) along the axis of the adjusting sleeve rod (62); when the expansion part (63) moves and contacts the two movable baffles (65), the two movable baffles (65) are expanded under the pushing of the expansion part (63), and the first cavity (34) and the second cavity (35) are communicated; when the expansion part (63) is in the state of not moving, the expansion part (63) cooperates with the two movable baffles (65) and closes the circular through hole (611) on the partition plate (61).

2. A dust-proof and noise reduction helmet according to claim 1, characterized in that, The expansion part (63) is integrally formed by a front section (631) and a rear section (632), the front section (631) faces the movable baffles (65), the front section (631) is a hemispherical structure, the rear section (632) is a cylindrical structure, the two movable baffles (65) are respectively provided with a front section face (652) and a rear section face (653), when the expansion part (63) is in the state of not moving, the front section face (652) on the two movable baffles (65) is attached to the front section (631), when the expansion part (63) moves and contacts the two movable baffles (65), the rear section face (653) of the two movable baffles (65) is attached to the rear section (632), and in the contacting state, the two movable baffles (65) are away from each other under the pushing of the expansion part (63) and form two through openings (654).

3. A dust-reducing, noise-reducing helmet according to claim 2, characterized in that The outer part of the rear section (632) is provided with a first magnetic attraction member (6321) around the circumference thereof, and the rear section face (653) of the movable baffle (65) is provided with a first ferrous attraction member (6531) capable of being magnetically attracted to the first magnetic attraction member (6321).

4. The dust-proof and noise reduction helmet according to claim 1, wherein, The side of each of the two movable baffles (65) away from each other is provided with a first sleeve (66), and the deep groove of the partition plate (61) is provided with a second sleeve (67) capable of being telescopically connected to the first sleeve (66), and the first sleeve (66) and the second sleeve (67) are sleeved with a spring (671).

5. The dust-proof and noise reduction helmet according to claim 1, wherein, The adjusting sleeve rod (62) comprises an adjusting sleeve (621), a screw rod (622), a nut (623) and a knob (624), one end of the adjusting sleeve (621) is connected with the framework (64), the other end of the adjusting sleeve (621) penetrates through the ear cover shell (31) and extends outward away from the side of the sponge cover (32) away from the sponge cover (32), the expansion part (63) is provided with a perforation for avoiding and closely fitting the outer part of the adjusting sleeve (621), the screw rod (622) is arranged inside the adjusting sleeve (621) along the axis of the adjusting sleeve (621), one end of the screw rod (622) penetrates through the adjusting sleeve (621) and extends outward away from the end of the adjusting sleeve (621) away from the framework (64), the other end of the screw rod (622) is rotationally connected with the inner end of the adjusting sleeve (621) close to the framework (64), the knob (624) is arranged on the end of the screw rod (622) extending outward, the nut (623) is threadedly connected to the outside of the screw rod (622), the peripheral surface of the nut (623) is closely fitted with the inner wall of the adjusting sleeve (621), the peripheral surface of the nut (623) is provided with a radially extending connecting block (6231), one end of the connecting block (6231) is connected with the inner wall of the perforation of the expansion part (63), and the adjusting sleeve (621) is provided with a strip-shaped perforation (6211) for moving the connecting block (6231) along the axis of the adjusting sleeve (621).

6. The dust-proof and noise reduction helmet according to claim 1, wherein, One side of one of the two movable baffles (65) close to the other movable baffle (65) is provided with a second ferrous attraction member (655), and the other movable baffle (65) is provided with a second magnetic attraction member (656) capable of being magnetically attracted to the second ferrous attraction member (655).

7. The dust-proof and noise reduction helmet according to claim 1, wherein, The upper edges of the two sides of the second dustproof goggles (4) are provided with outwardly extending pressing parts (41), and the inner side walls of the second dustproof goggles (4) close to the first dustproof goggles (2) are symmetrically provided with slide blocks (42), and the vertical faces of the first dustproof goggles (2) close to the second dustproof goggles (4) are provided with strip-shaped sliding grooves (21) for vertical movement of the slide blocks (42).

8. A dust-reducing, noise-reducing helmet according to claim 7, characterized in that The upper edges of the two sides of the first dustproof goggles (2) are symmetrically provided with clamping columns (23), and the upper edges of the two sides of the second dustproof goggles (4) are provided with buckles (43) clamped with the clamping columns (23).

9. The adjusting method of the dustproof and noise reduction helmet, applied to the dustproof and noise reduction helmet in any one of claims 1-8, characterized in that, The steps include: S1, the user wears the helmet body (1) on the head, and can extend the second dustproof goggles (4) according to needs, when it is needed to be extended, the second dustproof goggles (4) are vertically extended downward to provide more comprehensive dustproof protection, so as to increase the dustproof area; S2, when wearing the helmet body (1), the user can firmly fix the noise reduction earmuffs (3) on both sides of the head through the connecting frame; S3, when wearing the noise reduction earmuffs (3), the user can manually adjust the noise reduction degree through the noise reduction adjustment mechanism (6). In a very noisy environment, the user can adjust the noise reduction degree to the highest to minimize noise interference. In a relatively quiet environment, the noise reduction degree can be reduced to maintain the perception of the surrounding environment and ensure the safety of cycling; S4, when the noise reduction degree of the earmuffs needs to be adjusted, the user moves the extension part (63) by manually controlling the extension end of the adjusting sleeve rod (62), when the extension part (63) moves to the position of the two movable baffles (65), the extension part (63) will push the two movable baffles (65) to expand, the opening of the circular through hole (611) will be enlarged, allowing more sound to enter the inside of the earmuffs, thereby reducing the noise reduction effect, so that the user can better perceive the external sound; S5, when the noise reduction degree of the earmuffs needs to be increased, the extension part (63) will cooperate with the two movable baffles (65) to close the circular through hole (611) on the baffle (61), and the external noise is effectively blocked outside the earmuffs, providing a more quiet and comfortable environment for the user; S6, when the noise reduction degree of the earmuffs needs to be reduced, the extension part (63) is moved by operating the adjusting sleeve rod (62), when the extension part (63) moves forward and contacts the two movable baffles (65), the extension part (63) will push the movable baffles (65) to move to the deep part of the empty slot (612), in this state, the front section (631) gradually moves away from the front end face of the movable baffle (65), while the rear end part gradually approaches the rear end face of the movable baffle (65) and contacts it, at this time, the two movable baffles (65) will separate from each other and form two through openings (654), through the opening of the two through openings (654), more sound can enter the inside of the earmuffs, thereby reducing the noise reduction effect, so that the user can better perceive the external sound.

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