Dustproof noise reduction helmet and adjusting method thereof

Abstract

The invention relates to the technical field of noise reduction helmets, in particular to a dustproof noise reduction helmet and an adjusting method of the dustproof noise reduction helmet. The dustproof noise reduction helmet comprises a helmet body, first dustproof goggles are installed on the front side of the helmet body, and noise reduction earmuffs are installed on the two sides of the helmet body; a first dustproof goggle is arranged on the helmet body, a second dustproof goggle capable of vertically extending downwards is arranged outside the first dustproof goggle, adjusting frames used for being connected with noise reduction earmuffs are arranged on the two sides of the helmet body respectively, each noise reduction earmuff is provided with an earmuff shell and a sponge cover, the earmuff shells are connected with the adjusting frames, and the sponge covers are arranged on the inner sides of the earmuff shells. A noise reduction adjusting mechanism capable of manually adjusting the noise reduction degree is arranged in the earmuff shell, the dustproof area is increased through cooperation of the first dustproof goggles and the second dustproof goggles, the noise reduction degree is adjusted through the noise reduction adjusting mechanism arranged in the noise reduction earmuff, and the safety of a rider is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of noise reduction helmets, in particular to a dust-proof and noise-reduction helmet, and in particular to an adjustment method for the dust-proof and noise-reduction helmet. Background Art

[0002] In cycling, helmets are key equipment to protect riders’ heads, and the optimization of their performance is directly related to riders’ safety and comfort. As riders’ demands for helmet functions diversify, dust-proof and noise-reducing helmets have gradually become the new favorite in the market. However, while pursuing dust-proof and noise-reducing effects, riders 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 riding environments.

[0003] China Publication No. CN213096391U discloses a noise-reducing helmet, comprising a helmet body and noise-reducing earmuffs, wherein the noise-reducing earmuffs are arranged on both sides of the helmet body close to the ears of the wearer, a through hole is arranged in the center of the noise-reducing earmuffs, a sound filter cotton is arranged near the inner side of the through hole, a slot is arranged in the vertical direction inside the noise-reducing earmuffs and passes through the bottom of the noise-reducing earmuffs, a plug-in board is inserted in the slot, a gray filter cotton is arranged in the center of the plug-in board, and the overall shape of the gray filter cotton is set to be circular, two spring locks are arranged inside the top of the plug-in board and are symmetrically arranged and inserted into the spring lock grooves arranged on both sides of the slot, and a reset spring is arranged between the two spring locks. The noise-reducing helmet provided by the patent can not only effectively reduce external noise, but also adopts a gray filter cotton that can be repeatedly cleaned and replaced, which can ensure the cleanliness of the sound filter cotton and effectively improve the service life of the sound insulation cotton.

[0004] However, although the above patent can effectively isolate external noise, its noise reduction degree cannot be adjusted, which brings inconvenience during riding. For example, in a quiet riding environment, riders need to perceive external sounds such as traffic conditions, pedestrian prompts, etc. to ensure riding safety, while traditional earmuffs may completely isolate these sounds, increasing the risk of riding. In addition, dust goggles, as an important part of riding helmets, usually have a fixed dustproof range and cannot be adjusted according to the actual needs of users. During riding, riders may need to adjust the dustproof range of dust goggles according to different road conditions and weather conditions to achieve the best dustproof effect. However, most of the dust goggles in the prior art lack this adjustment function, resulting in limited dustproof effect and unable to meet the diverse needs of riders. Therefore, a riding helmet that is both lightweight and has an adjustable noise reduction function and dustproof range is provided. Summary of the invention

[0005] In view of the above problems, a dustproof and noise-reducing helmet and an adjustment method thereof are provided. The first dustproof goggles and the second dustproof goggles are cooperated to increase the dustproof area, and a noise reduction adjustment mechanism is arranged in the noise reduction earmuffs to adjust the noise reduction degree to ensure the safety of the rider.

[0006] In order to solve the problems of the prior art, the present invention provides a dust-proof and noise-reducing helmet, comprising a helmet body, a first dust-proof goggles is installed on the front side of the helmet body, noise-reducing earmuffs are installed on both sides of the helmet body, a second dust-proof goggles which can be extended vertically downward is arranged outside the first dust-proof goggles, adjustment frames for connecting the noise-reducing earmuffs are respectively arranged on both sides of the helmet body, the noise-reducing earmuffs are provided with an earmuff shell and a sponge cover, the earmuff shell is connected to the adjustment frame, the sponge cover is arranged on the inner side of the earmuff shell, and a noise-reduction adjustment mechanism which can manually adjust the noise reduction degree is arranged inside the earmuff shell.

[0007] Preferably, the noise reduction adjustment mechanism includes a partition, an adjustment sleeve rod and an extension part, the partition is arranged inside the earmuff shell, the partition divides the interior of the earmuff shell into a first cavity and a second cavity, a circular through hole penetrating both sides of the partition is arranged at the center, the adjustment sleeve rod passes through the circular through hole and is arranged inside the earmuff shell, one end of the adjustment sleeve rod extends toward the sponge cover and is connected with a frame, the frame is fixedly arranged on the inner wall of the earmuff shell, the other end of the adjustment sleeve rod extends from a side of the earmuff shell away from the sponge cover, an empty groove is arranged around the circular through hole at the center of the partition, two movable baffles that can move toward the center of the circular through hole are arranged in the empty groove, the extension part is slidably mounted on the adjustment sleeve rod along the axis of the adjustment sleeve rod, when the extension part moves toward and contacts the two movable baffles, the two movable baffles are expanded under the push of the extension part, and the first cavity is connected to the second cavity, when the extension part is not moved, the extension part and the two movable baffles cooperate with each other and close the circular through hole on the partition.

[0008] Preferably, the extension part is integrally formed by a front section and a rear section, the front section faces the movable baffle, the front section is a hemispherical structure, and 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 of the two movable baffles are in contact with the front section. When the extension part moves toward and contacts the two movable baffles, the rear section surfaces of the two movable baffles are in contact with the rear section. In this contact state, the two movable baffles are pushed away from each other by the extension part and form two openings.

[0009] Preferably, a first magnetic adsorption component is embedded on the outside of the rear section around its own circumferential direction, and a first iron adsorption component that can be magnetically matched with the first magnetic adsorption component is embedded on the rear section surface of the movable baffle.

[0010] Preferably, a first sleeve is provided on each side of the two movable baffles away from each other, a second sleeve that can be telescopically sleeved with the first sleeve is provided in the deep groove of the partition, and a spring is sleeved between the first sleeve and the second sleeve.

[0011] Preferably, the adjusting sleeve rod comprises an adjusting sleeve, a screw, a nut and a knob, one end of the adjusting sleeve is connected to the frame, the other end of the adjusting sleeve passes through a side of the earmuff shell away from the sponge cover and extends outward, the extension portion is provided with a through hole for avoiding and closely fitting the outside of the adjusting sleeve, the screw is arranged inside the adjusting sleeve along the axis of the adjusting sleeve, one end of the screw passes through the end of the adjusting sleeve away from the frame and extends outward, the other end of the screw is rotatably connected to an inner end of the adjusting sleeve close to the frame, the knob is arranged at the protruding end of the screw, the nut is threadedly connected to the outside of the screw, the circumferential surface of the nut is fitted with the inner wall of the adjusting sleeve, the circumferential surface of the nut is provided with a radially extending connecting block, one end of the connecting block is connected to the perforated inner wall of the extension portion, and the adjusting sleeve is provided with a strip-shaped through hole for allowing the connecting block to move along the axis of the adjusting sleeve.

[0012] Preferably, a second iron adsorption component is provided on a side of one of the two movable baffles close to the other movable baffle, and a second magnetic adsorption component that can magnetically cooperate with the second iron adsorption component is provided on the other movable baffle.

[0013] Preferably, the upper edges on both sides of the second dustproof goggles are provided with pressing portions extending outward, sliding blocks are symmetrically arranged on the inner side wall of the second dustproof goggles close to the first dustproof goggles, and a strip-shaped sliding groove for vertical movement of the sliding block is provided on the vertical surface of the first dustproof goggles close to the second dustproof goggles.

[0014] Preferably, the upper edges on both sides of the first dustproof goggles are symmetrically provided with snap-fitting posts, and the upper edges on both sides of the second dustproof goggles are provided with buckles that snap-fit ​​with the snap-fitting posts.

[0015] A method for adjusting a dustproof and noise-reducing helmet is applied to a dustproof and noise-reducing helmet, comprising the following steps:

[0016] S1. The user wears the helmet body on the head and can extend the second dust-proof goggles as needed. When extension is needed, the second dust-proof goggles are extended vertically downward to provide more comprehensive dust-proof protection to increase the dust-proof area.

[0017] S2. When wearing the helmet, the user securely fixes the noise reduction earmuffs on both sides of the head through the connecting frame.

[0018] S3. When wearing noise-reducing earmuffs, users can manually adjust the noise reduction level through the noise reduction adjustment mechanism. For example, in an extremely noisy environment, users can adjust the noise reduction level to the highest level to minimize noise interference, while in a relatively quiet environment, the noise reduction level can be reduced to maintain awareness of the surrounding environment and ensure riding safety.

[0019] S4. When the noise reduction degree of the earmuff needs to be adjusted, the user manually controls the extended end of the adjustment sleeve to drive the extension part to move. When the extension part moves toward the position of the two movable baffles, the extension part will push the two movable baffles to unfold, and the opening of the circular through hole 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.

[0020] S5. When the noise reduction level of the earmuffs needs to be increased, the extension part will cooperate with the two movable baffles to close the circular through holes on the baffles. The external noise will be effectively blocked outside the earmuffs, providing users with a quieter and more comfortable environment.

[0021] S6. When the noise reduction degree of the earmuff needs to be lowered, the extension part is moved by operating the adjustment sleeve rod. When the extension part moves forward and contacts the two movable baffles, the extension part will push the movable baffles to move deeper into the slot. In this state, the front section gradually moves away from the front end surface of the movable baffle, while the rear end gradually approaches the rear end surface of the movable baffle and contacts it. At this time, the two movable baffles will separate from each other and form two through openings. By opening the two through openings, more sound can enter the inside of the earmuff, thereby reducing the noise reduction effect and enabling the user to better perceive external sounds.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The first dust-proof goggles installed on the front side of the helmet body of the present invention can effectively block dust, splashes, etc. from the front, and the second dust-proof goggles that can be extended vertically downward are also provided outside the first dust-proof goggles, which can provide more comprehensive dust-proof protection when needed. When encountering an environment with strong winds or more dust, the user can extend the second dust-proof goggles downward to increase the dust-proof area.

[0024] 2. The present invention can adjust the noise reduction degree according to the needs of the user through the noise reduction adjustment mechanism arranged inside the earmuff shell. For example, in an extremely noisy environment, the user can adjust the noise reduction degree to the highest level to minimize noise interference, while in a relatively quiet environment, the noise reduction degree can be reduced to maintain awareness of the surrounding environment and ensure riding safety.

[0025] 3. The present invention divides the interior of the earmuff shell into two independent first cavities and second cavities through a partition, and its function is to isolate and reduce the introduction of external noise. When the noise reduction degree of the earmuff needs to be adjusted, the user drives the extension part to move by manually controlling the extended end of the adjustment sleeve rod, and when the extension part moves to the position of the two movable baffles, the extension part will push the two movable baffles to unfold. In this way, the opening of the circular through hole will be enlarged, allowing more sound to enter the interior of the earmuff, thereby reducing the noise reduction effect, so that the user can better perceive the external sound. When the extension part does not move, the extension part will cooperate with the two movable baffles to jointly close the circular through hole on the partition. In this way, the external noise is effectively blocked outside the earmuff, providing a quieter and more comfortable environment for the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structure of a dust-proof and noise-reducing helmet Figure 1 .

[0027] Figure 2 yes Figure 2 Enlarged view of point A in the middle.

[0028] Figure 3 It is a three-dimensional structure of a dust-proof and noise-reducing helmet Figure 2 .

[0029] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0030] Figure 5 The invention discloses a three-dimensional structural schematic diagram of a first dustproof goggles and a second dustproof goggles of a dustproof and noise reduction helmet.

[0031] Figure 6 The present invention is a structural cross-sectional view of a dust and noise reduction helmet.

[0032] Figure 7 yes Figure 6 Enlarged view of center C.

[0033] Figure 8 It is a state of noise reduction earmuffs for dust and noise reduction helmets Figure 1 .

[0034] Fig. 9 It is a state of noise reduction earmuffs for dust and noise reduction helmets Figure 2 .

[0035] Fig.10 The present invention is a partial three-dimensional structural cross-sectional view of a noise reduction earmuff of a dust-proof and noise-reducing helmet.

[0036] Fig.11 The present invention is a schematic diagram of the partial three-dimensional structure of the noise reduction earmuffs of a dust-proof and noise-reducing helmet.

[0037] Fig.12 The invention discloses a partial cross-sectional view of a noise reduction earmuff of a dust and noise reduction helmet.

[0038] The numbers in the figure are: 1. Helmet body; 2. First dustproof goggles; 21. Strip slide; 22. Rubber strip; 23. Snap-on column; 3. Noise reduction earmuffs; 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 bar block; 43. Buckle; 5. Adjustment frame; 6. Noise reduction adjustment 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 , limit slider; 62, adjustment sleeve rod; 621, adjustment sleeve; 6211, strip through-hole; 622, screw rod; 623, nut; 6231, connection block; 624, knob; 63, extension part; 631, front section; 632, rear section; 6321, first magnet adsorption member; 64, skeleton; 65, movable baffle; 651, first through-hole; 652, front section surface; 653, rear section surface; 6531, first iron adsorption member; 654, through-hole; 655, second iron adsorption member; 656, second magnet adsorption member; 66, first sleeve; 67, second sleeve; 671, spring. DETAILED DESCRIPTION

[0039] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] Reference Figures 1 to 12 As shown: a dust-proof and noise-reducing helmet, comprising a helmet body 1, a first dust-proof goggles 2 is installed on the front side of the helmet body 1, noise-reducing earmuffs 3 are installed on both sides of the helmet body 1, a second dust-proof goggles 4 that can be extended vertically downward is arranged outside the first dust-proof goggles 2, adjustment frames 5 for connecting the noise-reducing earmuffs 3 are respectively arranged on both sides of the helmet body 1, the noise-reducing earmuffs 3 are provided with earmuff shells 31 and sponge covers 32, the earmuff shells 31 are connected to the adjustment frames 5, the sponge covers 32 are arranged on the inner side of the earmuff shells 31, and a noise-reduction adjustment mechanism 6 capable of manually adjusting the degree of noise reduction is arranged inside the earmuff shells 31.

[0041] The front side of the helmet body 1 is provided with a first dustproof goggles 2, which can effectively block dust, splashes, etc. from the front. The first dustproof goggles 2 are also provided with a second dustproof goggles 4 that can be extended vertically downward outside, which can provide more comprehensive dust protection when needed. When encountering a windy or dusty environment, 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 anti-fog and dustproof plastic glass.

[0042] When wearing the helmet body 1, the user firmly fixes 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 bracket with adjustable length and made of metal or plastic. This application will not be elaborated based on the connecting frame. 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 level to minimize noise interference, and in a relatively quiet environment, the noise reduction degree can be reduced to maintain awareness of the surrounding environment and ensure riding safety.

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

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

[0045] Reference Figures 6 to 9As shown, the noise reduction adjustment mechanism 6 includes a partition 61, an adjustment sleeve rod 62 and an extension portion 63. The partition 61 is arranged inside the earmuff shell 31. The partition 61 divides the inside of the earmuff shell 31 into a first cavity 34 and a second cavity 35. A circular through hole 611 penetrating both sides of the partition 61 is arranged at the center. The adjustment sleeve rod 62 penetrates the circular through hole 611 and is arranged inside the earmuff shell 31. One end of the adjustment sleeve rod 62 extends toward the sponge cover 32 and is connected to a frame 64. The frame 64 is fixedly arranged on the inner wall of the earmuff shell 31. The other end of the adjustment sleeve rod 62 extends from the earmuff shell 31 to a side away from the sponge cover 32. The circular through hole 611 at the center of the partition 61 is extended out, and a groove 612 is provided around it. Two movable baffles 65 that can move toward the center of the circular through hole 611 are provided in the groove 612. The extension part 63 is slidably mounted on the adjusting sleeve rod 62 along the axis of the adjusting sleeve rod 62. When the extension part 63 moves toward and contacts the two movable baffles 65, the two movable baffles 65 are unfolded under the push of the extension part 63, and the first cavity 34 is connected with the second cavity 35. When the extension part 63 is not moved, the extension part 63 and the two movable baffles 65 cooperate with each other to close the circular through hole 611 on the partition 61.

[0046] The interior of the earmuff shell 31 is divided into two independent first cavities 34 and second cavities 35 by the partition 61, which is used to isolate and reduce the introduction of external noise. When the noise reduction degree of the earmuff needs to be adjusted, the user manually controls the extended end of the adjustment sleeve rod 62 to drive the extension part 63 to move. 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 unfold. In this way, the opening of the circular through hole 611 will be enlarged, allowing more sound to enter the interior of the earmuff, thereby reducing the noise reduction effect, so that the user can better perceive the external sound. When the extension part 63 does not move, the extension part 63 will cooperate with the two movable baffles 65 to jointly close the circular through hole 611 on the partition 61. The external noise is effectively blocked outside the earmuff, providing a quieter and more comfortable environment for the user.

[0047] A first through hole 651 is provided on the side of the movable baffle 65 away from the circular through hole 611, and a second through hole 613 corresponding to the first through hole 651 is provided on the partition 61. When the movable baffle 65 is pushed to the deepest part of the depth by the extension part 63, the first through hole 651 is docked with the second through hole 613. At this time, the first through hole 651 is connected with the second through hole 613 to form a channel, and the channel is respectively connected with the first cavity 34 and the second cavity 35, 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 to block the entry of external noise.

[0048] The partition 61 is provided with a second interlayer, and the interior of the second interlayer is filled with second sound-absorbing cotton 614, which further increases the noise reduction effect.

[0049] Reference Figures 6 to 9 As shown: the extension portion 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, and 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 portion 63, when the extension portion 63 is in a non-moving state, the front section surfaces 652 on the two movable baffles 65 are in contact with the front section 631, when the extension portion 63 moves toward and contacts the two movable baffles 65, the rear section surfaces 653 of the two movable baffles 65 are in contact with the rear section 632, in this contact state, the two movable baffles 65 are pushed away from each other by the extension portion 63 and form two through openings 654.

[0050] The front section 631 is a hemispherical structure, so that the front section 631 can be well fitted with the front section surface 652 of the movable baffle 65, thereby effectively closing the circular through hole 611 on the partition 61 and reducing the entry of external noise. When the extension portion 63 is not moved, the front section surfaces 652 of the two movable baffles 65 are tightly fitted with the surface of the front section 631, thereby jointly closing the circular through hole 611 on the partition 61. At this time, the two movable baffles 65 are tightly fitted, effectively blocking the entry of external noise. When the user needs to adjust the degree of noise reduction, the user moves the extension part 63 by operating the adjustment 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 deeper into the 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 separate from each other and form two through openings 654. By opening the two through openings 654, more sound can enter the inside of the earmuff, thereby reducing the noise reduction effect and enabling the user to better perceive external sounds.

[0051] Reference Figures 6 to 9 As shown, a first magnetic adsorption component 6321 is embedded on the outside of the rear section 632 around its own circumferential direction, and a first iron adsorption component 6531 that can magnetically cooperate with the first magnetic adsorption component 6321 is embedded on the rear section surface 653 of the movable baffle 65.

[0052] When the extension part 63 moves forward and contacts the movable baffle 65, the magnetic attraction between the first iron adsorption part 6531 and the first magnetic adsorption part 6321 will immediately take effect to prevent the movement tendency caused by external factors such as vibration, thereby ensuring that the extension part 63 can stay stably in the desired position. 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 on its own.

[0053] Reference Figures 10 to 12 As shown, a first sleeve 66 is provided on the side of the two movable baffles 65 away from each other, a second sleeve 67 which can be telescopically sleeved with the first sleeve 66 is provided in the deep groove of the partition 61, and a spring 671 is sleeved between the first sleeve 66 and the second sleeve 67.

[0054] When the noise reduction effect needs to be adjusted, the user operates the adjustment sleeve 62 to move the extension part 63 and push the two movable baffles 65 to move. During this process, the first sleeve 66 will perform telescopic movement in the second sleeve 67, and the spring 671 will deform.

[0055] Specifically, the spring 671, as an elastic element, plays two roles 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, in which case the two movable baffles 65 move away from each other; second, after the external force disappears, the spring 671 can push the movable baffle 65 to return to its original position, in which case the two movable baffles 65 move closer to each other. Through the cooperation of the first sleeve 66, the second sleeve 67 and the spring 671, a stable connection between the movable baffle 65 and the partition 61 is achieved.

[0056] Vertical plates 615 are symmetrically arranged on both sides of the movable baffle 65 in the empty slot 612, and limiting slots 616 are arranged on the adjacent sides of the two vertical plates 615. Limiting sliders 617 that can move in a limited position in the corresponding two limiting slots 616 are arranged on both sides of the movable baffle 65. When the movable baffle 65 moves, the limiting sliders 617 cooperate with the limiting slots 616 to enable the movable baffle 65 to move stably.

[0057] Reference Figures 7 to 10As shown in the figure, the adjustment sleeve rod 62 includes an adjustment sleeve 621, a screw rod 622, a nut 623 and a knob 624. One end of the adjustment sleeve 621 is connected to the frame 64, and the other end of the adjustment sleeve 621 passes through the earmuff shell 31 away from the sponge cover 32 and extends outward. The extension portion 63 is provided with a perforation for avoiding and closely fitting the outside of the adjustment sleeve 621. The screw rod 622 is arranged inside the adjustment sleeve 621 along the axis of the adjustment sleeve 621. One end of the screw rod 622 passes through the end of the adjustment sleeve 621 away from the frame 64 and extends outward. The other end of the rod 622 is rotatably connected to the inner end of the adjusting sleeve 621 close to the skeleton 64, the knob 624 is arranged at the protruding end of the screw rod 622, the nut 623 is threadedly connected to the outside of the screw rod 622, the circumference of the nut 623 is fitted with the inner wall of the adjusting sleeve 621, the circumference of the nut 623 is provided with a radially extending connecting block 6231, one end of the connecting block 6231 is connected to the perforated inner wall of the extension part 63, and the adjusting sleeve 621 is provided with a strip-shaped through-hole 6211 for allowing the connecting block 6231 to move along the axis of the adjusting sleeve 621.

[0058] When it is necessary to drive the extension part 63 to move, the user only needs to operate the knob 624 to drive the screw 622 to rotate. During the rotation of the screw 622, the cooperation between the connecting block 6231 and the strip-shaped through-hole 6211 plays a limiting role in the movement of the nut 623. This limiting role enables the nut 623 to only move along the axial direction of the screw 622, and will not rotate with the rotation of the screw 622, so that the extension part 63 can move smoothly along the axis of the adjusting sleeve 621 and cooperate with the two movable baffles 65.

[0059] Reference Fig.12 As shown, one of the two movable baffles 65 is provided with a second iron adsorption component 655 on one side close to the other movable baffle 65 , and the other movable baffle 65 is provided with a second magnetic adsorption component 656 that can magnetically cooperate with the second iron adsorption component 655 .

[0060] When the two movable baffles 65 need to be closed, the movable baffle 65 with the second iron adsorption component 655 is close to the movable baffle 65 with the second magnetic adsorption component 656. Due to the effect of magnetic attraction, the second iron adsorption component 655 and the second magnetic adsorption component 656 will be quickly and firmly adsorbed together, so that the two movable baffles 65 are tightly closed.

[0061] Reference Figures 1 to 4 As shown: the upper edges of both sides of the second dustproof goggles 4 are provided with pressing parts 41 extending outward, the inner wall of the second dustproof goggles 4 close to the first dustproof goggles 2 is symmetrically provided with sliding blocks 42, and the vertical surface of the first dustproof goggles 2 close to the second dustproof goggles 4 is provided with a strip-shaped sliding groove 21 for the sliding block 42 to move vertically.

[0062] When the second dustproof goggles 4 need to be extended downward, the user only needs to press the pressing part 41 to move the second dustproof goggles 4 downward. When the second dustproof goggles 4 move downward, the slider block 42 provided on the second dustproof goggles 4 moves vertically along the corresponding strip groove 21 on the first dustproof goggles 2. The strip groove 21 does not penetrate the lower side of the first dustproof goggles 2. Therefore, when the slider block moves to the lowest position of the strip groove 21, it abuts against one end of the inner side of the strip groove 21 to prevent the second dustproof goggles 4 from being separated from the first dustproof goggles 2. The slider block 42 is made of rubber material. When the slider block 42 moves along the strip groove 21 and moves to the required position, since the slider block 42 is made of rubber material, the contact area between the slider block 42 and the inner wall of the strip groove 21 is increased, so that the slider block 42 will not move along the strip groove 21 without being affected by external force. The lower side of the first dustproof goggles 2 is provided with a rubber strip 22 that can contact the inner wall of the second dustproof goggles 4. When the second dustproof goggles 4 are extended to the lowermost position, the rubber strip 22 can abut against the inner wall of the second dustproof goggles 4, which can not only provide a certain support for the second dustproof goggles 4, but also provide a certain buffering effect, so that the second dustproof goggles 4 are stably in an extended state, avoiding shaking of the second dustproof goggles 4 when used after being extended.

[0063] Reference Figures 1 to 4 As shown: the first dustproof goggles 2 are symmetrically provided with clamping posts 23 on both sides of the upper edges, and the second dustproof goggles 4 are provided with buckles 43 that are clamped and matched with the clamping posts 23 on both sides of the upper edges.

[0064] When the user does not extend the second dustproof goggles 4, the first dustproof goggles 2 are connected to the second dustproof goggles 4 by the coupling of the coupling column 23 on the first dustproof goggles 2 and the buckle 43 on the second dustproof goggles 4. At this time, the first dustproof goggles 2 and the second dustproof goggles 4 form a whole. The buckle 43 is an elastic structure, which can tightly clamp the coupling column 23 when the first dustproof goggles 2 and the second dustproof goggles 4 are coupled, so as to prevent the first dustproof goggles 2 and the second dustproof goggles from being separated when connected.

[0065] Reference Figures 1 to 12 As shown: A method for adjusting a dustproof and noise-reducing helmet, applied to a dustproof and noise-reducing helmet, comprises 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. When extension is needed, the second dustproof goggles 4 are extended vertically downward to provide more comprehensive dustproof protection to increase the dustproof area.

[0067] S2. When wearing the helmet body 1, the user firmly fixes the noise reduction earmuffs 3 on both 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 an extremely noisy environment, the user can adjust the noise reduction degree to the highest level to minimize noise interference, while in a relatively quiet environment, the noise reduction degree can be reduced to maintain awareness of the surrounding environment and ensure riding safety.

[0069] S4. When the noise reduction degree of the earmuff needs to be adjusted, the user manually controls the extended end of the adjustment sleeve rod 62 to drive the extension part 63 to move. When the extension part 63 moves toward the position of the two movable baffles 65, the extension part 63 will push the two movable baffles 65 to unfold, and 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.

[0070] S5. When the noise reduction level of the earmuff needs to be increased, the extension portion 63 will cooperate with the two movable baffles 65 to jointly close the circular through hole 611 on the partition 61, so that the external noise is effectively blocked outside the earmuff, providing a quieter and more comfortable environment for the user.

[0071] S6. When the noise reduction degree of the earmuff 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 deeper into the slot 612. In this state, the front section 631 gradually moves away from the front end surface of the movable baffle 65, while the rear end gradually approaches the rear end surface 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. The opening of the two through openings 654 allows more sound to enter the interior of the earmuff, thereby reducing the noise reduction effect and enabling the user to better perceive external sounds.

[0072] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A dustproof and noise-reducing helmet, comprising a helmet body (1), a first dustproof goggles (2) being mounted on the front side of the helmet body (1), and noise-reducing earmuffs (3) being mounted on both sides of the helmet body (1), characterized in that: A second dustproof goggle (4) which can be extended vertically downward is arranged outside the first dustproof goggle (2); adjustment frames (5) for connecting noise reduction earmuffs (3) are respectively arranged on both sides of the helmet body (1); the noise reduction earmuffs (3) are provided with an earmuff shell (31) and a sponge cover (32); the earmuff shell (31) is connected to the adjustment frame (5); the sponge cover (32) is arranged on the inner side of the earmuff shell (31); and a noise reduction adjustment mechanism (6) capable of manually adjusting the degree of noise reduction is arranged inside the earmuff shell (31).

2. A dust and noise reduction helmet according to claim 1, characterized in that: The noise reduction adjustment mechanism (6) comprises a partition (61), an adjustment sleeve rod (62) and an extension part (63); the partition (61) is arranged inside the earmuff shell (31); the partition (61) divides the inside of the earmuff shell (31) into a first cavity (34) and a second cavity (35); a circular through hole (611) penetrating through both sides of the partition (61) is arranged at the center of the partition (61); the adjustment sleeve rod (62) penetrates the circular through hole (611) and is arranged inside the earmuff shell (31); one end of the adjustment sleeve rod (62) extends toward the sponge cover (32) and is connected to a frame (64); the frame (64) is fixedly arranged on the inner wall of the earmuff shell (31); the other end of the adjustment sleeve rod (62) extends from one end of the earmuff shell (31) away from the sponge cover (32) The expansion portion (63) is slidably mounted on the adjustment sleeve (62) along the axis of the adjustment sleeve (62); when the expansion portion (63) moves toward and contacts the two movable baffles (65), the two movable baffles (65) are deployed under the push of the expansion portion (63), and the first cavity (34) is connected to the second cavity (35); when the expansion portion (63) is not moved, the expansion portion (63) and the two movable baffles (65) cooperate with each other to close the circular through hole (611) on the partition (61).

3. A dust and noise reduction helmet according to claim 2, characterized in that: The expansion part (63) is formed integrally with 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, and 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). When the expansion part (63) is in a non-moving state, the front section surfaces (652) on the two movable baffles (65) are in contact with the front section (631). When the expansion part (63) moves toward and contacts the two movable baffles (65), the rear section surfaces (653) of the two movable baffles (65) are in contact with the rear section (632). In this contact state, the two movable baffles (65) are pushed away from each other by the expansion part (63) and form two through openings (654).

4. A dust and noise reduction helmet according to claim 3, characterized in that: A first magnetic adsorption component (6321) is inlaid on the outside of the rear section (632) around its own circumferential direction, and a first iron adsorption component (6531) capable of magnetically matching with the first magnetic adsorption component (6321) is inlaid on the rear section surface (653) of the movable baffle (65).

5. The dust and noise reduction helmet according to claim 2, characterized in that: A first sleeve (66) is respectively provided on one side of the two movable baffles (65) away from each other, a second sleeve (67) capable of being telescopically sleeved with the first sleeve (66) is provided in the deep groove of the partition (61), and a spring (671) is sleeved between the first sleeve (66) and the second sleeve (67).

6. The dust and noise reduction helmet according to claim 2, characterized in that: The adjusting sleeve rod (62) comprises an adjusting sleeve (621), a screw (622), a nut (623) and a knob (624); one end of the adjusting sleeve (621) is connected to the frame (64); the other end of the adjusting sleeve (621) passes through a side of the earmuff shell (31) away from the sponge cover (32) and protrudes outward; the extension portion (63) is provided with a through hole for avoiding and closely fitting the outside of the adjusting sleeve (621); the screw (622) is arranged inside the adjusting sleeve (621) along the axis of the adjusting sleeve (621); one end of the screw (622) passes through an end of the adjusting sleeve (621) away from the frame (64) and protrudes outward; The other end of (622) is rotatably connected to the inner end of the adjusting sleeve (621) close to the frame (64), the knob (624) is arranged at the protruding end of the screw rod (622), the nut (623) is threadedly connected to the outside of the screw rod (622), the circumference of the nut (623) is in contact with the inner wall of the adjusting sleeve (621), the circumference of the nut (623) is provided with a radially extending connecting block (6231), one end of the connecting block (6231) is connected to the perforated inner wall of the extension part (63), and the adjusting sleeve (621) is provided with a strip-shaped through-hole (6211) for allowing the connecting block (6231) to move along the axis of the adjusting sleeve (621).

7. The dust and noise reduction helmet according to claim 2, characterized in that: A second iron adsorption component (655) is provided on one side of the two movable baffles (65) close to the other movable baffle (65), and a second magnetic adsorption component (656) capable of magnetically cooperating with the second iron adsorption component (655) is provided on the other movable baffle (65).

8. The dust and noise reduction helmet according to claim 1, characterized in that: The upper edges of both sides of the second dustproof goggles (4) are provided with pressing portions (41) extending outwards, the inner side wall of the second dustproof goggles (4) close to the first dustproof goggles (2) is symmetrically provided with sliding blocks (42), and the vertical surface of the first dustproof goggles (2) close to the second dustproof goggles (4) is provided with a strip-shaped sliding groove (21) for the sliding block (42) to move vertically.

9. The dust and noise reduction helmet according to claim 8, characterized in that: The upper edges of both sides of the first dustproof goggles (2) are symmetrically provided with clamping posts (23), and the upper edges of both sides of the second dustproof goggles (4) are provided with buckles (43) that are clamped and matched with the clamping posts (23).

10. A method for adjusting a dustproof and noise-reducing helmet, applied to a dustproof and noise-reducing helmet as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The user wears the helmet body (1) on the head and can extend the second dustproof goggles (4) as needed. When extension is required, the second dustproof goggles (4) are extended vertically downward to provide more comprehensive dustproof protection and increase the dustproof area. S2. When wearing the helmet body (1), the user securely fixes the noise reduction earmuffs (3) on both sides of the head via the connecting frame. S3. When wearing the noise reduction earmuffs (3), the user can manually adjust the noise reduction level through the noise reduction adjustment mechanism (6). For example, in an extremely noisy environment, the user can adjust the noise reduction level to the highest level to minimize noise interference, while in a relatively quiet environment, the user can reduce the noise reduction level to maintain awareness of the surrounding environment and ensure riding safety. S4. When the noise reduction degree of the earmuff needs to be adjusted, the user manually controls the extended end of the adjusting sleeve rod (62) to drive the extension part (63) to move. When the extension part (63) moves toward the position of the two movable baffles (65), the extension part (63) pushes the two movable baffles (65) to expand, and the opening of the circular through hole (611) is enlarged, allowing more sound to enter the earmuff, thereby reducing the noise reduction effect, so that the user can better perceive the external sound. S5. When the noise reduction degree of the earmuff needs to be increased, the extension part (63) cooperates with the two movable baffles (65) to jointly close the circular through hole (611) on the partition (61), so that the external noise is effectively blocked outside the earmuff, providing a quieter and more comfortable environment for the user. S6. When the noise reduction degree of the earmuff needs to be reduced, the expansion part (63) is moved by operating the adjustment sleeve rod (62). When the expansion part (63) moves forward and contacts the two movable baffles (65), the expansion part (63) pushes the movable baffles (65) to move deeper into the empty slot (612). In this state, the front section (631) gradually moves away from the front end surface of the movable baffle (65), while the rear end gradually approaches the rear end surface of the movable baffle (65) and contacts it. At this time, the two movable baffles (65) are separated from each other and form two through openings (654). The opening of the two through openings (654) allows more sound to enter the interior of the earmuff, thereby reducing the noise reduction effect and enabling the user to better perceive external sounds.

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