A helmet flight ring assembly and helmet

Abstract

This application discloses a helmet suspension ring assembly, belonging to the field of head protection, used to solve the problem of how to adjust the back head angle and improve the stability of angle maintenance. The helmet suspension ring assembly includes: a strap, a toothed belt, and a back head assembly. The strap is provided with a rotating pivot and a ratchet groove, the ratchet groove having a first tooth facing the rotating pivot. The toothed belt is provided with a pivot latch and elastic ratchet teeth. The pivot latch is rotatably mounted on the rotating pivot about an axis and fixed relative to the rotating pivot in the length direction of the axis. The elastic ratchet teeth have elastic deformation capability and are provided with a second tooth pattern that adapts to and connects with the first tooth pattern. The back head assembly is disposed on the toothed belt. In the initial state, the second tooth pattern is connected to a first position of the first tooth pattern, and the back head assembly is at a first angle; when the toothed belt rotates clockwise, the second tooth pattern elastically deforms and rotates from the first position of the first tooth pattern to a second position, and the back head assembly is at a second angle, which is different from the first angle.

Description

Technical Field

[0001] This application relates to the field of head protection, and in particular to a helmet air suspension assembly and a helmet. Background Technology

[0002] Helmets are protective gear for the head, and industrial helmets, a type of personal protective equipment, are crucial for protecting the head from injuries caused by falling objects, impacts, and electric shocks. They are widely used across various high-risk industries, including construction, manufacturing, power and energy, petrochemicals, transportation, and municipal engineering. The internal structure of an industrial helmet is a suspension system, commonly known as a suspension ring. Common industry requirements include safety and reliability, lightweight comfort, easy disassembly for cleaning and maintenance, a wide range of adjustable head circumference sizes, and adjustable headrest angles to accommodate various head shapes and sizes.

[0003] Currently, the most common and practical suspension system on the market consists of a headband with a front band providing basic head circumference adjustment, and a back band and toothed straps for adjustable head circumference. The headband then connects to a top band, forming a fully functional suspension system. While this suspension system meets basic head circumference adjustment needs, it exhibits some significant drawbacks in practical applications. Specifically, some suspension systems lack adjustable back head angles, making it difficult for some users to achieve a comfortable wearing experience; while others, although offering back head angle adjustment, exhibit inconsistent angle retention during use, affecting both reliability and comfort.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This application provides a helmet air suspension assembly and a helmet, which can solve the problem of how to adjust the back head angle and improve the stability of angle maintenance in the prior art.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0009] According to one aspect of this application, a helmet air suspension assembly is provided for mounting on a helmet body, the helmet air suspension assembly comprising:

[0010] A strap for mounting to the helmet body, the strap having a rotating pivot and a ratchet groove, the ratchet groove having a first tooth facing the rotating pivot;

[0011] The toothed belt is provided with a pivot foot and an elastic ratchet. The pivot foot is rotatably disposed on the rotating pivot about an axis and fixed relative to the rotating pivot in the length direction of the axis. The elastic ratchet has elastic deformation capability and is provided with a second tooth pattern adapted to the first tooth pattern. The second tooth pattern is connected to the first tooth pattern.

[0012] The rear headrest assembly is disposed on the toothed belt;

[0013] In the initial state, the second tooth is connected to the first tooth at a first position, and the headrest assembly is at a first angle; when the toothed belt rotates around the rotation pivot, the second tooth elastically deforms and rotates from the first position of the first tooth to a second position, and the headrest assembly is at a second angle, which is different from the first angle.

[0014] In some embodiments, each end of the band is provided with a toothed band, and the headrest assembly is disposed between the two toothed bands, the band, the toothed band and the headrest assembly forming a ring-shaped structure.

[0015] In some embodiments, the headrest assembly includes: a headrest cover, a gear component, a knob, and a knob shaft; the knob is connected to the gear component, and the knob and gear component are rotatably mounted on the headrest cover via a rotating shaft, and the gear component is provided with a gear; the toothed belt is provided with a rack, and is slidably mounted on the headrest cover along the length direction of the rack, the racks of the two toothed belts are parallel to each other, and both are connected to the gear; the gear component is provided with a cantilever, the cantilever has elastic deformation capability, and is provided with a backstop tooth; the headrest cover is provided with a toothed ring. The inner side of the gear ring is provided with a ratchet pattern, and the anti-reverse tooth is connected to the ratchet pattern, allowing the gear components to rotate relative to each other in a first direction and be relatively fixed in a second direction. The knob is provided with an outer ring column. When the knob rotates in the first direction, the gear drives the two racks to move closer to each other, thus reducing the size of the ring structure. When the knob rotates in the second direction, the outer ring column presses against the cantilever, causing the cantilever to elastically deform. The anti-reverse tooth separates from the ratchet pattern, allowing the gear components to rotate relative to each other in the second direction.

[0016] In some embodiments, the gear component is provided with a traction hole, and the knob is provided with an inner ring column foot, the inner ring column foot being at least partially disposed in the traction hole.

[0017] In some embodiments, the helmet air ring assembly further includes an inner headrest cover fixedly connected to the outer headrest cover, the inner headrest cover being provided with a pivot limiting groove; the gear component is provided with a central hole passing through the gear axis, the knob is provided with a central hole passing through the gear axis, the knob pivot includes a pivot and a top cover and a locking foot provided at both ends of the pivot, the top cover being located on the side of the knob away from the gear component, the pivot being provided through the central hole and the central hole, and the locking foot being fixedly provided in the pivot limiting groove.

[0018] In some embodiments, the outer headrest cover is provided with a slot, and the inner headrest cover is provided with a tenon, the tenon being fixedly disposed in the slot.

[0019] In some embodiments, the outer headrest cover is provided with a pressure band beam and two limiting ribs, the inner headrest cover is provided with a guide slope and two guide ribs, the guide slope is located between the guide ribs and the limiting ribs, and the toothed belt is slidably disposed between the limiting ribs and the guide ribs, and passes through the pressure band beam.

[0020] In some embodiments, the headrest cover is provided with a shaft ring, the knob is provided with an annular groove adapted to the shaft ring, and the shaft ring is disposed in the annular groove.

[0021] In some embodiments, the band is provided with a plurality of strip holes for connecting the top band, a plurality of first hooks for connecting the top band, a plurality of hooks for connecting the sweatband, and a plurality of second hooks for connecting the chin strap.

[0022] According to another aspect of this application, a helmet is provided, including the helmet air ring assembly and the helmet body as described in any one of the above claims.

[0023] (III) Beneficial Effects

[0024] Compared with the prior art, the beneficial effects of the technical solution provided in this application include at least the following:

[0025] The helmet air suspension assembly and helmet of this application can adjust the angle of the headrest assembly via a toothed belt. Specifically, in the initial state, the second tooth is connected to the first tooth at the first position, and the headrest assembly is at the first angle. When the angle of the headrest assembly needs to be adjusted, the toothed belt is rotated, and the elastic ratchet deforms through the first position of the ratchet groove. After reaching the desired second angle, the second tooth of the elastic ratchet returns to its original shape and re-engages with the first tooth of the ratchet groove, thus maintaining the angle. That is, the elastic deformation of the second tooth rotates from the first position of the first tooth to the second position. At this time, the headrest assembly is at the second angle, which is different from the first angle, thus achieving the adjustment of the headrest assembly angle. The toothed belt is rotatably mounted on the rotating hub of the hoop via a pivot foot around an axis and is fixed relative to the rotating hub in the axial length direction to prevent it from disengaging from the hoop. Through the engagement of the elastic ratchet and the ratchet groove, the second tooth connects with the first tooth, making the toothed belt less prone to rotation after the headrest assembly angle is adjusted, thereby improving the stability of angle maintenance. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an exploded view of the helmet air ring assembly in an embodiment of this application;

[0028] Figure 2 This is an exploded view of the back of the hoop, toothed belt, and rear headrest assembly in the embodiments of this application;

[0029] Figure 3 This is an exploded front view of the hoop, toothed belt, and rear headrest assembly in the embodiments of this application;

[0030] Figure 4 This is a frontal perspective view of the hoop, toothed belt, and rear headrest assembly connected in the first position in the embodiments of this application;

[0031] Figure 5 This is a rear perspective view of the connection between the hoop, toothed belt, and rear headrest assembly in an embodiment of this application.

[0032] Figure label:

[0033] 1. Hoop, 11. Rotating pivot, 12. Racket groove, 121. First tooth pattern, 13. Strip hole, 14. First hanging point, 15. Hook, 16. Second hanging point;

[0034] 2. Toothed belt, 21. Pivot foot, 22. Elastic ratchet, 221. Second tooth pattern, 23.

[0035] 3. Rear headrest cover; 31. Toothed ring; 311. Rattle pattern; 32. Slot; 33. Pressure band beam; 34. Limiting rib; 35. Shaft ring;

[0036] Gear component 4, gear 41, cantilever 42, anti-reverse gear 421, traction hole 43, central hole 44;

[0037] Knob 5, outer ring post 51, inner ring post 52, center hole 53, annular groove 54;

[0038] Knob pivot 6, pivot 61, top cover 62, clip 63;

[0039] 7. Backrest inner cover, 71. Rotary pivot limiting groove, 72. Clip, 73. Guide slope, 74. Guide rib.

[0040] Top belt assembly 8, third hanging point 81.

[0041] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0042] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0043] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0045] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0046] Some existing headrest rings do not allow for adjustment of the back head angle, making it difficult for some people to obtain a good comfort experience when wearing them; while other headrest rings that do have back head angle adjustment functions have unreasonable connection structure designs, and the positions are prone to wear during use, which leads to unstable angle maintenance and affects the reliability and comfort of wearing them.

[0047] To address the aforementioned technical problems, this embodiment provides a helmet air suspension assembly. (See also...) Figures 1 to 5 As shown, Figure 1 This is an exploded view of the helmet air ring assembly in an embodiment of this application. Figure 2 This is an exploded rear view of the hoop, toothed belt, and rear headrest assembly in an embodiment of this application. Figure 3 This is an exploded front view of the hoop, toothed belt, and headrest assembly in an embodiment of this application. Figure 4 This is a front perspective view of the hoop, toothed belt, and rear headrest assembly connected in the first position according to an embodiment of this application. Figure 5 This is a rear perspective view of the connection between the hoop, toothed belt, and rear headrest assembly in an embodiment of this application.

[0048] This embodiment provides a helmet airlock assembly for installation on the helmet body (not shown). The helmet airlock assembly includes: a band 1, a toothed band 2, and a headrest assembly.

[0049] The ferrule 1 is used for mounting to the helmet body. The mounting method can use existing methods, and since it is not an innovation of this application, it will not be described in detail here. The ferrule 1 is provided with a rotating hub 11 and a ratchet groove 12. The ratchet groove 12 is provided with a first tooth 121 facing the rotating hub 11. The toothed belt 2 is provided with a hub catch 21 and an elastic ratchet 22. The hub catch 21 is rotatably mounted on the rotating hub 11 about an axis and fixed relative to the rotating hub 11 in the axial length direction, i.e., it has a degree of freedom of circumferential rotation, but is fixed in the axial length direction, ensuring that the toothed belt 2 rotates only along a set trajectory, avoiding deviation during adjustment. The elastic ratchet 22 has elastic deformation capability and is provided with a second tooth 221 adapted to the first tooth 121, and the second tooth 221 is connected to the first tooth 121. The headrest assembly is disposed on the toothed belt 2.

[0050] Among them, such as Figure 4 As shown, in the initial state, the second tooth 221 is connected to the first tooth 121 at the first position, and the headrest assembly is at the first angle; when the toothed belt 2 rotates around the rotation pivot, the second tooth 221 elastically deforms and rotates from the first position of the first tooth 121 to the second position, that is... Figure 4 The flexible ratchet 22 is positioned to the right of the headrest assembly, which is at a second angle, different from the first angle, thus enabling angle adjustment. The engagement of the flexible ratchet 22 with the ratchet groove 12 provides initial locking; when the user rotates the toothed belt 2, the flexible ratchet 22 deforms, disengages from the current tooth pattern, and slides to an adjacent tooth pattern, realizing graded adjustment of the headrest assembly angle, with each angle automatically locked without additional operation.

[0051] It is understandable that there may be several positions between the first position and the second position, forming different angle positions. The specific number of positions is determined according to the number of the second tooth 221 and the first tooth 121.

[0052] The process of adjusting the headrest angle of the helmet's air-cushion assembly is as follows: Push the entire headrest assembly to drive the toothed belt 2 to rotate along the rotating pivot 11. The elastic ratchet 22 can deform to pass through the tooth position of the ratchet groove 12. After reaching the expected angle, the elastic ratchet 22 returns to its original shape and meshes with the ratchet groove 12 again, thereby playing a retaining role.

[0053] See Figure 1 and Figure 4 As shown, each end of the headband 1 has a toothed band 2, and the headrest assembly is positioned between the two toothed bands 2. The headband 1, toothed bands 2, and headrest assembly together form a ring-shaped structure. The headband 1 improves the helmet's fit through the symmetrical toothed bands 2 on both sides.

[0054] See Figure 2 and Figure 5As shown, the headrest assembly includes: a headrest cover 3, a gear component 4, a knob 5, and a knob shaft 6. The knob 5 is connected to the gear component 4, and the knob 5 and gear component 4 are rotatably mounted on the headrest cover 3 via a rotating shaft, and a gear 41 is provided thereon. A toothed belt 2 is provided with a rack 23, and is slidably mounted on the headrest cover 3 along the length of the rack 23. The racks 23 of the two toothed belts 2 are parallel to each other and are both connected to the gear 41. The gear component 4 is provided with a cantilever 42, which has elastic deformation capability and is provided with a ratchet 421. The headrest cover 3 is provided with a gear ring 31, and the inner side of the gear ring 31 is provided with a ratchet 311. The ratchet 421 connects with the ratchet 311, allowing the gear component 4 to rotate relative to each other in a first direction and be relatively fixed in a second direction. The knob 5 is equipped with an outer ring column base 51. When the knob 5 rotates in the first direction, the gear 41 drives the two racks 23 to move closer to each other, thus reducing the size of the ring structure. When the knob 5 rotates in the second direction, the outer ring column base 51 presses against the cantilever 42, causing the cantilever 42 to elastically deform. The anti-reverse tooth 421 separates from the ratchet 311, allowing the gear component 4 to rotate relative to each other in the second direction. The headrest assembly drives the gear 41 through the knob 5, converting the rotational motion of the knob 5 into the linear motion of the toothed belt 2, controlling the sliding of the toothed belt 2 to adjust the ring diameter to accommodate different head circumferences. The beveled design of the ratchet 311 ensures that the cantilever 42 automatically resets and engages when rotated clockwise, while counterclockwise rotation requires external force to press the cantilever 42 to disengage, preventing accidental loosening and enhancing adjustment reliability. When knob 5 is turned counterclockwise, the outer ring post 51 presses the cantilever 42 to disengage it from the ratchet 311. The rotation angle of knob 5 triggers the deformation of cantilever 42, unlocking the one-way locking function.

[0055] See Figure 2 and Figure 3 As shown, the gear component 4 is provided with a traction hole 43, and the knob 5 is provided with an inner ring column foot 52, which is at least partially located in the traction hole 43. The engagement of the inner ring column foot 52 and the traction hole 43 forms a linkage structure, transmitting the torque of the knob 5 to the gear component 4, ensuring that the knob 5 can drive the gear component 4 to rotate.

[0056] See Figure 2 and Figure 3As shown, the helmet's air suspension assembly also includes an inner headrest cover 7 fixedly connected to the outer headrest cover 3, and the inner headrest cover 7 is provided with a pivot limiting groove 71; the gear component 4 is provided with a central hole 44 passing through the axis of the gear 41, and the knob 5 is provided with a central hole 53 passing through the axis of the gear 41. The knob pivot 6 includes a pivot 61 and top covers 62 and locking feet 63 provided at both ends of the pivot 61. The top covers 62 are located on the side of the knob 5 away from the gear component 4. The pivot 61 is provided through the central hole 44 and the central hole 53, and the locking feet 63 are fixedly provided in the pivot limiting groove 71. The locking feet 63 of the knob pivot 6 are fixed in the pivot limiting groove 71, and their function is to fix the position of the knob pivot 6, prevent axial movement, and realize the axial positioning of the pivot 61. The rotating shaft 61 passes through the central hole 44 of the gear component 4 and the knob 5. The top cover 62 limits the rotation, and the locking foot 63 is fixed to the front cover. This ensures that the knob 5 and the gear component 4 rotate coaxially. That is, the rotating shaft 61 serves as the rotation center axis, and the top cover 62 and the inner cover 7 of the rear headrest restrict the axial displacement of the knob 5 and the gear component 4.

[0057] See Figure 2 and Figure 3 As shown, the inner headrest cover 7 is provided with a latch 72, and the outer headrest cover 3 is provided with a slot 32. The latch 72 is fixedly set in the slot 32. The interference fit between the latch 72 and the slot 32 forms a fixed connection, eliminating the need for screws or other additional fasteners, and enabling quick assembly of the inner headrest cover 7 and the outer headrest cover 3.

[0058] See Figure 2 and Figure 3 As shown, the outer headrest cover 3 is provided with a pressure beam 33 and two limiting ribs 34, while the inner headrest cover 7 is provided with a guide slope 73 and two guide ribs 74. The guide slope 73 is located between the guide ribs 74 and the limiting ribs 34. The toothed belt 2 is slidably disposed between the limiting ribs 34 and the guide ribs 74, and passes through the pressure beam 33. The limiting ribs 34 and the inner headrest cover 7 restrict the lateral displacement of the toothed belt 2 during sliding. The pressure beam 33 forms a through hole for the toothed belt 2 to pass through, preventing it from dislodging. The inclined surface design of the guide slope 73 assists the toothed belt 2 in entering the slide rail, and the guide ribs 74 further correct the sliding path.

[0059] See Figure 2 and Figure 3 As shown, the outer cover 3 of the headrest is provided with a shaft ring 35, and the knob 5 is provided with an annular groove 54 that is adapted to the shaft ring 35. The shaft ring 35 is embedded in the annular groove 54 of the knob 5.

[0060] See Figure 1 and Figure 3As shown, the ferrule 1 is provided with several slotted holes 13 for connecting to the top strap, several first hooks 14 for connecting to the top strap, several hooks 15 for connecting to the sweatband, and several second hooks 16 for connecting to the chin strap. It integrates multiple functional interfaces and a standardized connection structure, facilitating quick assembly of other helmet accessories such as sweatbands and chin straps.

[0061] See Figure 1 and Figure 3 As shown, the helmet air ring assembly also includes a top strap assembly 8, which is provided with a third attachment point 81 and is mounted on the strip hole 13 or the first attachment point 14 of the band 1 through the third attachment point 81, so that the two are connected as a whole.

[0062] The assembly process of the helmet air suspension component in this application is as follows:

[0063] Step 1: Assemble the backrest cover 3 assembly. Place the knob 5 onto the shaft ring 35 of the backrest cover 3. Then, insert the gear 4 into the gear ring 31 of the backrest cover 3, ensuring the anti-reverse gear 421 contacts the gear ring 31. Simultaneously, align the knob 5's pin with the gear 41's structure, i.e., insert the inner pin 52 into the traction hole 43, and the outer pin 51 rest against the outside of the rotating arm. Next, pass the knob's rotating shaft 61 through the center hole 53 of the knob 5, and push the retaining pin 63 into the center hole 44 of the gear 41. At this point, the assembly of the backrest cover 3 as the main body is complete.

[0064] Step 2: Assemble the toothed belt 2 assembly. Pass the ends of the left and right toothed belts 2 under the pressure beam 33 of the outer cover of the headrest 3, ensuring the right toothed belt 2 is stacked towards the inside and the left toothed belt 2 towards the outside. Then, engage the teeth at the ends of the left and right toothed belts 2 with the corresponding gears 41. Next, align the pivot limiting groove 71 in the middle of the inner cover of the headrest with the locking foot 63 of the knob pivot 6, and simultaneously align the locking tenons 72 at both ends with the locking grooves 32 of the outer cover of the headrest 3. Press firmly to allow the locking tenons 72 to enter the locking grooves 32, completing the assembly of the toothed belt 2 assembly. Note the vertical orientation of the trademark on the top cover 62 of the knob pivot 6.

[0065] Step 3: Assemble the headband assembly. Pass the elastic ratchet 22 of the toothed belt 2 through the fan-shaped hole of the rotating hub 11 of the corresponding side (left or right), then buckle it into the ratchet groove 12, and press the hub clip 21 into the rotating hub 11. Complete the assembly of the other side (right or left) in the same way. The headband assembly is now complete.

[0066] Step 4: Suspension System Assembly. Install the corresponding hanging points of the top strap assembly 8 onto the strip hole 13 or the first hanging point 14 of the aforementioned hoop 1, connecting the two into a whole. Then, install the sweatband onto the reserved sweatband hook 15, thus forming a complete suspension system, commonly known as the air suspension ring.

[0067] The head circumference adjustment process for the helmet's air suspension assembly in this application is as follows:

[0068] Adjusting the head circumference size: Hold the pinch part of knob 5 and rotate it clockwise. At this time, the inner ring post 52 acts on the traction hole 43, driving gear 41 to rotate around the rotating shaft 61. Gear 41 further drives the toothed belt, causing the toothed belt 2 to move in the opposite direction along the predetermined track under the combined action of the limiting rib 34, the pressure beam 33, the guide slope 73, and the guide rib 74. Because the rotating arm is elastic, it will deform during rotation and will not hinder the clockwise rotation of gear 41. When the toothed belt 2 moves to the expected head circumference position, stop rotating. At this time, the anti-reverse tooth 421 at the end of the rebounding rotating arm will lock onto the toothed ring 31, playing a locking role and preventing the head circumference size from being stretched by the head when worn.

[0069] Adjusting the head circumference size: Hold the knob 5 by the same hand, but this time rotate it counterclockwise. The inner ring post 52 acts on the traction hole 43, driving the gear 41 to rotate around the shaft 61. At the same time, the outer ring post 51 presses against the rotating arm, deforming it and causing the anti-reverse tooth 421 at the end of the rotating arm to disengage from the gear ring 31, thus releasing the locking state. The gear 41 further drives the belt teeth, causing the belt 2 to move in the opposite direction along the predetermined track under the combined action of the limiting rib 34, the pressure beam 33, the guide slope 73, and the guide rib 74. When the belt 2 moves in the opposite direction to the expected head circumference position, it stops rotating. At this time, the anti-reverse tooth 421 at the end of the spring-back rotating arm will lock onto the gear ring 31 again, acting as a lock to prevent the head circumference size from being stretched open by the head when worn.

[0070] Throughout the entire head circumference adjustment process, the locking foot 63 of the knob shaft 6 is always locked by the shaft limiting groove 71 of the inner cover of the headrest, and the knob shaft 6 will not rotate. Therefore, it can be ensured that the trademark on the top cover 62 remains in the correct orientation, making it easy for users to identify.

[0071] This embodiment provides a helmet, including the helmet airlock assembly and helmet body described in the above embodiments. The helmet airlock assembly, through its modular design, enables rapid helmet production and is compatible with different helmet types.

[0072] The helmet air suspension assembly and helmet of this application can adjust the angle of the headrest assembly via the toothed belt 2. Specifically, in the initial state, the second tooth 221 is connected to the first tooth 121 at the first position, and the headrest assembly is at the first angle. When it is necessary to adjust the angle of the headrest assembly, the toothed belt 2 is rotated, and the elastic ratchet 22, through elastic deformation, passes through the first position of the ratchet groove 12 to the desired second angle. After reaching the desired second angle, the second tooth 221 of the elastic ratchet 22 returns to its original shape and re-engages with the first tooth 121 of the ratchet groove 12, thus maintaining the angle. That is, the elastic deformation of the second tooth 221 rotates from the first position of the first tooth 121 to the second position. At this time, the headrest assembly is at the second angle, which is different from the first angle, thereby realizing the adjustment of the headrest assembly angle. The toothed belt 2 is rotatably mounted on the rotating hub 11 of the hoop 1 via the pivot foot 21 around an axis and is fixed relative to the rotating hub 11 in the axial length direction to prevent it from detaching from the hoop 1. It also engages with the ratchet groove 12 via the elastic ratchet 22 and the second tooth pattern 221 connects with the first tooth pattern 121, so that the toothed belt 2 is not easy to rotate after the angle of the back head assembly is adjusted, thereby improving the stability of angle maintenance.

[0073] Equally important, the connection between the hoop 1 and the toothed belt 2 utilizes a rotating hub 11 and a hub clamp 21, allowing for tool-free assembly by hand, significantly improving ease of assembly. The elastic ratchet 22, rotating around the connection hub, provides the rear headrest assembly with an adjustable angle that follows the toothed belt 2; moreover, the elastic ratchet 22 is less prone to wear, resulting in higher reliability. The gear 41 employs an externally pressurized rotating arm, providing superior torque compared to the more common internally pull type, making operation more convenient and effortless.

[0074] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0076] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A helmet air suspension assembly for mounting on the helmet body, characterized in that, The helmet air-cushion assembly includes: A strap for mounting to the helmet body, the strap having a rotating pivot and a ratchet groove, the ratchet groove having a first tooth facing the rotating pivot; The toothed belt is provided with a pivot foot and an elastic ratchet. The pivot foot is rotatably disposed on the rotating pivot about an axis and fixed relative to the rotating pivot in the length direction of the axis. The elastic ratchet has elastic deformation capability and is provided with a second tooth pattern adapted to the first tooth pattern. The second tooth pattern is connected to the first tooth pattern. The rear headrest assembly is disposed on the toothed belt; In the initial state, the second tooth is connected to the first tooth at a first position, and the headrest assembly is at a first angle; when the toothed belt rotates around the rotation pivot, the second tooth elastically deforms and rotates from the first position of the first tooth to a second position, and the headrest assembly is at a second angle, which is different from the first angle.

2. The helmet air-cushion assembly according to claim 1, characterized in that, Each end of the band has a toothed band, and the headrest assembly is disposed between the two toothed bands. The band, toothed band, and headrest assembly are arranged to form a ring structure.

3. The helmet airborne ring assembly according to claim 2, characterized in that, The headrest assembly includes: a headrest cover, a gear assembly, a knob, and a knob shaft; the knob is connected to the gear assembly, and the knob and gear assembly are rotatably mounted on the headrest cover via a shaft, and a gear is provided thereon; the toothed belt is provided with a rack, and is slidably mounted on the headrest cover along the length direction of the rack, the racks of the two toothed belts are parallel to each other, and both are connected to the gear; the gear assembly is provided with a cantilever, the cantilever has elastic deformation capability, and is provided with a backstop tooth; the headrest cover is provided with a toothed ring, the toothed ring... The inner side is provided with a ratchet pattern, and the anti-reverse tooth is connected to the ratchet pattern, so that the gear component can rotate relative to each other in a first direction and be relatively fixed in a second direction; wherein, the knob is provided with an outer ring column foot, when the knob is rotated in the first direction, the gear drives the two racks to move towards each other to reduce the ring structure; when the knob is rotated in the second direction, the outer ring column foot compresses the cantilever, causing the cantilever to elastically deform, the anti-reverse tooth separates from the ratchet pattern, so that the gear component can rotate relative to each other in the second direction.

4. The helmet airborne ring assembly according to claim 3, characterized in that, The gear component is provided with a traction hole, and the knob is provided with an inner ring column foot, with the inner ring column foot at least partially located in the traction hole.

5. The helmet airborne ring assembly according to claim 3, characterized in that, The helmet air suspension assembly also includes an inner headrest cover fixedly connected to the outer headrest cover, the inner headrest cover being provided with a pivot limiting groove; the gear component is provided with a central hole passing through the gear axis, and the knob is provided with a central hole passing through the gear axis; the knob pivot includes a pivot and top covers and locking feet provided at both ends of the pivot, the top covers being located on the side of the knob away from the gear component, the pivot passing through the central hole and the central hole, and the locking feet being fixedly provided in the pivot limiting groove.

6. The helmet airborne ring assembly according to claim 5, characterized in that, The outer cover of the headrest is provided with a slot, and the inner cover of the headrest is provided with a tenon, which is fixedly disposed in the slot.

7. The helmet airborne ring assembly according to claim 5, characterized in that, The outer headrest cover is provided with a pressure band beam and two limiting ribs, and the inner headrest cover is provided with a guide slope and two guide ribs. The guide slope is located between the guide ribs and the limiting ribs. The toothed belt is slidably disposed between the limiting ribs and the guide ribs and passes through the pressure band beam.

8. The helmet air suspension assembly according to claim 3, characterized in that, The outer cover of the headrest is provided with a shaft ring, the knob is provided with an annular groove that fits the shaft ring, and the shaft ring is disposed in the annular groove.

9. The helmet airborne ring assembly according to claim 1, characterized in that, The band is provided with several strip holes for connecting the top band, several first hooks for connecting the top band, several hooks for connecting the sweatband, and several second hooks for connecting the chin strap.

10. A helmet, characterized in that, Includes the helmet air suspension assembly and helmet body as described in any one of claims 1 to 9.

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