Helmet adjuster and helmet with same

Abstract

The helmet adjuster comprises an adjusting frame, two mounting frames, a rotator, a steel wire and a limiting frame, the two mounting frames are arranged on the two sides of the adjusting frame respectively, and the rotator is arranged on the upper front portion of the mounting frames; a limiting hole is formed in the limiting frame, an extension arm is arranged in the middle of the top end of the adjusting frame and penetrates through the limiting hole, and the steel wire penetrates through the mounting frame, the adjusting frame and the rotator; the rotator comprises a base, a rotating part, a limiting part, an outer cover and a mounting ring which are sequentially arranged from bottom to top, the base is arranged on the outer surface of the helmet, the mounting ring is arranged on the base, the rotating part is movably arranged in the base and the mounting ring, the limiting part is arranged on the rotating part, and the limiting part is arranged on the outer cover. And the outer cover is mounted on the mounting ring and covers the limiting piece and the rotating piece. The adjustor can be used for adjusting tightness and stretching and retracting, the application range is wider, and the wearing comfort and the flexibility of self-adjustment of a wearer are better.

Description

Technical Field

[0001] The utility model relates to the field of sports goods, in particular to a helmet adjuster and a helmet with the adjuster. Background Art

[0002] In recent years, due to the rise of outdoor cycling activities such as cycling fitness and tourism, as well as the popularity of electric vehicles and other means of transportation, the market for cycling protective products has also risen accordingly; in particular, protective helmets used for cycling are of top importance. In order to make the same helmet suitable for people with different head sizes, adjustable helmets are now available on the market. For example, the simplest one is to have a strap on each side of the helmet, connected by an 8-shaped buckle. However, this type of adjustment buckle is inconvenient to adjust after wearing, and the excess strap head hangs behind the head, touching the head or neck, affecting the wearing comfort.

[0003] There are also some structures that use gears and racks to rotate and move for adjustment, such as the helmet adjuster 20 and helmet of Chinese patent CN202122186230.X, which include: a rotating member, which is located behind the rear shell of the helmet; a transmission member, which is located in front of the rear shell of the helmet, and the transmission member includes a first connecting end, a chain structure and a second connecting end connected in sequence, the first connecting end and the second connecting end are arranged front and back, the first connecting end is connected to the rotating wheel, and the second connecting end is connected to the rotating member, and the chain structure includes at least two chain units hinged in sequence; the rotation of the rotating member can drive the transmission member and the rotating wheel to rotate. However, this type of adjuster 20 can only adjust the tightness of the adjustment belt, and the wearer cannot adjust the upper and lower positions of the adjustment belt according to preferences and needs, and the comfort is poor. Utility Model Content

[0004] Based on this, it is necessary to provide a helmet adjuster and a helmet with the adjuster to address the deficiencies in the prior art.

[0005] A helmet adjuster is installed on a helmet body, comprising an adjusting frame, two mounting frames, a rotator, a steel wire and a limiting frame, wherein the two mounting frames are respectively arranged on both sides of the adjusting frame, and the rotator is arranged on the front upper part of the mounting frame; a limiting hole is arranged on the limiting frame, and an extension arm is arranged at the middle of the top of the adjusting frame, and the extension arm is passed through the limiting hole, and the steel wire is passed through the mounting frame, the adjusting frame and the rotator; the rotator comprises a base, a rotating member, a limiting member, an outer cover and a mounting ring which are arranged in sequence from bottom to top, wherein the base is arranged on the outer surface of the helmet, the mounting ring is installed on the base, the rotating member is movably arranged in the base and the mounting ring, the limiting member is installed on the rotating member, the outer cover is installed on the mounting ring and covers the limiting member and the rotating member, and the inner surface of the outer cover Two limit blocks and two blocking blocks are arranged on the surface, a limit protrusion is arranged on the outer end surface of the rotating part, the two limit blocks extend on both sides of the limit protrusion, the two blocking parts extend on the outside of one end of the limit protrusion, and the two limit parts are distributed in an eight-shaped shape; the limit part includes a C-shaped main body and a clamping part arranged at both ends of the main body, the main body is arranged on the outside of the two limit blocks, and the outer surfaces of the two clamping parts abut against the inner surface of the blocking part; rotating teeth are arranged on the inner side surface of the mounting ring, and a clamping groove is arranged on the outer end of the clamping part, and the clamping groove is clamped on the rotating teeth; two wire entry holes are arranged on the mounting ring, and a wire entry hole and a wire outlet hole are arranged on the rotating part, the steel wire enters the wire entry hole of the self-rotator, and passes through the wire entry hole, the wire outlet hole and the other wire entry hole on the same side.

[0006] Furthermore, the adjustment frame is roughly W-shaped, including a middle frame, two brackets and an extension arm, the two brackets are respectively arranged on the left and right sides of the middle frame and are symmetrically arranged, and the extension arm is arranged on the top of the middle frame and extends upward.

[0007] Furthermore, the middle frame and the two brackets form a groove between the two brackets as a whole, and the groove is located at the bottom end of the middle frame; the middle of the middle frame and the brackets are both provided with through holes.

[0008] Furthermore, a limiting protrusion is provided on the outer surface of the rotating member, a positioning hole is provided in the middle of the limiting protrusion, a guide column is provided at a corresponding position of the outer cover, and the guide column is installed in the positioning hole.

[0009] Furthermore, a first limiting portion and a second limiting portion are provided on both outer sides of the positioning hole, a first limiting groove is provided on two opposite outer sides of the first limiting portion, and a second limiting groove is provided on two opposite outer sides of the second limiting portion.

[0010] Furthermore, two ends of the main body of the limiting member are embedded in the second limiting groove, and one side end of the limiting block is provided with a hook portion, and the hook portion is embedded in the first limiting groove.

[0011] Furthermore, the rotating member is arranged in an I-shape, including a middle limiting shaft and limiting plates arranged at both ends of the limiting shaft, and the outer diameter of the limiting plate is larger than the limiting shaft; the wire entry hole and the wire exit hole are both arranged on the limiting shaft.

[0012] Furthermore, the inner surface of the extension arm is provided with limiting teeth arranged along its extension direction, the extension arm is inserted into the limiting frame, and the limiting frame is provided with an extension block, which extends toward the direction of the limiting teeth and limits the limiting teeth.

[0013] A helmet, which particularly comprises a helmet body and an adjuster mounted on the helmet body, the adjuster comprises an adjusting frame, two mounting frames, a rotator, a steel wire and a limiting frame, the two mounting frames are respectively arranged on both sides of the adjusting frame, and the rotator is arranged at the front upper part of the mounting frame; a limiting hole is arranged on the limiting frame, an extension arm is arranged at the middle of the top of the adjusting frame, the extension arm is passed through the limiting hole, and the steel wire is passed through the mounting frame, the adjusting frame and the rotator; the rotator comprises a base, a rotating member, a limiting member, an outer cover and a mounting ring which are arranged in sequence from bottom to top, the base is arranged on the outer surface of the helmet, the mounting ring is mounted on the base, the rotating member is movably arranged in the base and the mounting ring, the limiting member is mounted on the rotating member, and the outer cover is mounted on the mounting ring and covers the limiting member and the rotating member. The inner surface of the outer cover is provided with two limit blocks and two blocking blocks, and a limit protrusion is provided on the outer end surface of the rotating member, the two limit blocks extend on both sides of the limit protrusion, the two blocking members extend outside one end of the limit protrusion, and the two limit members are distributed in an eight-shaped shape; the limit member includes a C-shaped main body and a clamping part arranged at both ends of the main body, the main body is arranged on the outside of the two limit blocks, and the outer surfaces of the two clamping parts abut against the inner surface of the blocking member; rotating teeth are provided on the inner side surface of the mounting ring, and a clamping groove is provided at the outer end of the clamping member, and the clamping groove is clamped on the rotating teeth; two wire entry holes are provided on the mounting ring, and a wire entry hole and a wire outlet hole are provided on the rotating member, and the steel wire enters the wire entry hole of the self-rotator and passes through the wire entry hole, the wire outlet hole and the other wire entry hole on the same side. The limiting frame is installed in the middle position of the rear side of the helmet body, the extension arm is inserted into the limiting hole from bottom to top, the two mounting frames are respectively installed on both sides of the helmet body, a hollow hole is provided in the middle of the rear side of the helmet body, a mounting strip extending in the front-rear direction is provided in the middle of the hollow hole, and the rotator is installed on the outer surface of the mounting strip.

[0014] Furthermore, the adjustment frame is roughly W-shaped, including a middle frame, two brackets and an extension arm, the two brackets are respectively arranged on the left and right sides of the middle frame and are symmetrically arranged, and the extension arm is arranged on the top of the middle frame and extends upward.

[0015] Furthermore, the middle frame and the two brackets form a groove between the two brackets as a whole, and the groove is located at the bottom end of the middle frame; the middle parts of the middle frame and the brackets are both provided with through holes.

[0016] Furthermore, a limiting protrusion is provided on the outer surface of the rotating member, a positioning hole is provided in the middle of the limiting protrusion, a guide column is provided at a corresponding position of the outer cover, and the guide column is installed in the positioning hole.

[0017] Furthermore, a first limiting portion and a second limiting portion are provided on both outer sides of the positioning hole, a first limiting groove is provided on two opposite outer sides of the first limiting portion, and a second limiting groove is provided on two opposite outer sides of the second limiting portion.

[0018] Furthermore, two ends of the main body of the limiting member are embedded in the second limiting groove, and one side end of the limiting block is provided with a hook portion, and the hook portion is embedded in the first limiting groove.

[0019] Furthermore, the rotating member is arranged in an I-shape, including a middle limiting shaft and limiting plates arranged at both ends of the limiting shaft, and the outer diameter of the limiting plate is larger than the limiting shaft; the wire entry hole and the wire exit hole are both arranged on the limiting shaft.

[0020] Furthermore, the inner surface of the extension arm is provided with limiting teeth arranged along its extension direction, the extension arm is inserted into the limiting frame, and the limiting frame is provided with an extension block, which extends toward the direction of the limiting teeth and limits the limiting teeth.

[0021] Furthermore, the middle parts of the middle frame and the bracket are both provided with through holes, and the middle part of the rear bottom end of the helmet body is provided with a receiving groove, and the through hole and the mounting groove are arranged in an inner and outer correspondence.

[0022] In summary, the beneficial effect of the utility model is that by designing an adjuster with elastic expansion effect, the rear head circumference of the helmet can be adjusted in the upper and lower positions and tightness according to the needs and usage habits, and the application range is wider, and the comfort and flexibility are better. In addition, the setting of the through hole 215 on the middle frame 211 is conducive to the long ponytail passing through the hole, so that the long ponytail will not stick to the neck, thereby improving the wearing comfort. The utility model is highly practical and has a strong promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a helmet with an adjuster according to the utility model;

[0024] Figure 2 for Figure 1 Schematic diagram of the exploded view of the helmet;

[0025] Figure 3 for Figure 2 Schematic diagram of the structure of the middle regulator;

[0026] Figure 4 for Figure 3 Partial structural diagram of the middle regulator;

[0027] Figure 5 for Figure 1 Schematic diagram of the internal structure of the helmet;

[0028] Figure 6 for Figure 2 A schematic diagram of the partial exploded structure of the middle rotator and the mounting bar;

[0029] Figure 7 for Figure 6 Exploded diagram of the middle rotator;

[0030] Figure 8 for Figure 6 An exploded diagram of another perspective of the middle rotator;

[0031] Fig. 9 for Figure 8 The structural diagram of the rotating part;

[0032] Fig.10 for Figure 8 Schematic diagram of the installation structure of the inner and outer covers, mounting rings, limiters and rotating parts. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] like Figures 1 to 10As shown, the utility model provides a helmet adjuster and a helmet 100 having the adjuster, which includes a helmet body 10 and an adjuster 20 installed in the helmet body 10, wherein the adjuster 20 is installed at the rear of the inner side of the helmet body 10. A receiving groove 11 is provided in the middle of the rear bottom end of the helmet body 10, a hollow hole 12 is provided in the middle of the rear side of the helmet body 10, and a mounting strip 13 extending in the front-to-back direction is provided in the middle of the hollow hole 12. In this embodiment, the outer surface of the mounting strip 13 is lower than the outer opening surface of the hollow hole 12. A limiting groove 14 and a mounting groove 15 provided above the limiting groove 14 are also provided in the middle of the inner surface of the rear side of the helmet body 10, a limiting frame 16 is provided in the mounting groove 15, and a limiting hole 161 is provided on the limiting frame 16. The limiting hole 161 extends along the front-back arc direction of the helmet body 10 , an extension block 162 is disposed on the inner side wall of the limiting hole 161 , and a limiting block 163 is disposed on the bottom end surface of the free end of the extension block 162 .

[0035] The regulator 20 includes an adjustment frame 21, two mounting frames 22, a rotator 23 and a steel wire 24. The adjustment frame 21 is installed at the middle position of the rear side of the helmet body 10, the two mounting frames 22 are respectively installed on both sides of the helmet body 10, the rotator 23 is installed on the outer side of the mounting strip 13 of the helmet body 10, and the steel wire 24 is passed through the adjustment frame 21, the mounting frame 22 and the rotator 23. In this embodiment, the steel wire 24 is a thin, flexible, not easy to break, and easy to bend and retract metal wire. It can be understood that in other embodiments, it can also be a wire of other materials, not limited to steel wire.

[0036] The adjustment frame 21 is generally W-shaped, and includes a middle frame 211, two brackets 212, and an extension arm 213. The two brackets 212 are respectively arranged on the left and right sides of the middle frame 211 and are symmetrically arranged. The extension arm 213 is arranged on the top of the middle frame 211 and extends upward. In this embodiment, the middle frame 211 and the two brackets 212 form a groove 214 between the two brackets 212 as a whole, and the groove 214 is located at the bottom end of the middle frame 211. The middle of the middle frame 211 and the bracket 212 are both provided with a through hole 215. The provision of the through hole 215 on the bracket 212 is not only convenient for ventilation, but also can increase the flexibility of the bracket 212.

[0037] The adjusting frame 21 is provided with a plurality of upper wire holes 216 and a plurality of lower wire holes 217. The upper wire holes 216 are provided on the outer surface of the upper frame of the adjusting frame 21, and the lower wire holes 217 are provided on the outer surface of the lower frame. Among them, the plurality of upper wire holes 216 and the plurality of lower wire holes 217 are distributed in a W shape. The mounting frame 22 is provided with an upper mounting hole 221, a lower mounting hole 222 and a limit hook 223. The limit hook 223 is provided with two and is located at the front side end of the mounting frame 22. Specifically, the mounting frame 22 is provided with an extension hole 224, and the limit hook 223 extends from the outer surface of the mounting frame to the extension hole 224. If there is no extension hole 224, the limit hook 223 extends toward the outer surface of the mounting frame 22, and its free end is spaced apart from the outer surface of the mounting frame 22. In addition, a mounting convex buckle 225 is provided on the outer surface of the mounting frame 22 , and a larger protrusion 226 is provided at the outer end of the mounting convex buckle 225 . The protrusion 226 is embedded in the helmet body 10 to limit and fix the mounting frame 22 .

[0038] The extension arm 213 is arranged in a long strip shape, and the inner surface thereof is provided with limiting teeth 218 arranged along the extension direction thereof, and the limiting teeth 218 is arranged in an outwardly convex arc shape, so that the extension arm 213 can be smoothly pulled out or clamped in for adjustment. The free end of the extension arm 213 is provided with a bayonet 219, and the bayonet 219 is provided with a clamping block 220 extending on the inner surface of one side of the free end, and the clamping block 220 is arranged at intervals from other side surfaces. The free end of the clamping block 220 extends obliquely toward the surface of one side of the extension wall limiting teeth 218 and extends outward. The extension arm 213 is inserted into the limiting frame 16, and the limiting block 163 is clamped on the limiting teeth 218. The clamping block 220 is used to limit the limiting block 163 to a maximum distance, which is the maximum distance of the limiting frame 16 pulled out by the extension arm 213. When the extension arm 213 needs to be taken out, the clamping block 220 can be taken out from the limiting frame 16 by pressing upward.

[0039] The rotator 23 includes a base 231, a rotating member 232, a stopper 233, an outer cover 235 and a mounting ring 236 which are sequentially arranged from bottom to top. The base 231 is arranged on the mounting bar 13, and further, the base 231 is integrally formed on the mounting bar 13. The mounting ring 236 and the rotating member 232 are both mounted on the base 231, and the rotating member 232 is located in the mounting ring 236. The outer cover 235 covers the rotating member 232, and the stopper 233 is arranged on the rotating member 232 and is located between the outer cover 235 and the rotating member 232. Specifically, a hollow guide column 2351 is arranged in the middle of the inner side surface of the outer cover 235, and two symmetrical stopper blocks 2352 are arranged on the outer side of the guide column 2351. The stopper blocks 2352 are arranged in an arc shape, and one end thereof is extended inwardly to be provided with a hook portion 2353. The outer cover 235 is also provided with two blocking blocks 2354, which are arranged on the outer side of the other end of the two limit blocks 2532 without the hook portion 2353, and the two blocking blocks 2354 are distributed in an eight-shaped shape. In addition, the bottom end of the inner side wall of the outer cover 235 is also provided with a plurality of flanges 2355, and the flanges 2355 are spaced apart from the inner bottom surface of the outer cover 235.

[0040] An annular mounting groove 2361 is provided on the outer surface of the mounting ring 236, the outer cover 235 is mounted on the mounting ring 236, the flange 2355 is clamped in the clamping groove 2361, and the outer cover 235 can rotate along the clamping groove 2361. The inner surface of the mounting ring 236 is provided with rotating teeth 2362 distributed in an annular shape, and the mounting ring 236 is also provided with two wire entry holes 2363. The limiting member 233 includes a main body 2331 arranged in a C shape and a clamping portion 2332 extending at both ends of the main body 2331, and the two clamping portions 2332 extend in opposite directions; the outermost end of the clamping portion 2332 is provided with a clamping groove 2333. In addition. A mounting column 2334 is also provided on the outer surface of the end of the main body 2331.

[0041] The rotating member 232 is arranged in an I-shape, and includes a limiting shaft 2321 in the middle and limiting plates 2322 arranged at both ends of the limiting shaft 2321, and the outer diameter of the limiting plate 2322 is larger than the limiting shaft 2321. The limiting shaft 2321 is also provided with a wire hole group, and the wire hole group includes a first wire inlet 2326, a second wire inlet 2325, a first wire outlet 2324 and a second wire outlet. Among them, the first wire inlet 2326 and the second wire inlet 2325 are located on the same side, the first wire outlet 2324 and the second wire outlet are located on the same side, and the distance between the first wire inlet 2326 and the second wire inlet 2325 is greater than the distance between the first wire outlet 2324 and the second wire outlet. The outer surface of the rotating member 232 is provided with a limiting protrusion, the middle of the limiting protrusion is provided with a positioning hole 2327, and the guide column 2351 of the outer cover 235 is installed in the positioning hole.

[0042] The first limiting portion 2328 and the second limiting portion 2329 are disposed on both outer sides of the positioning hole 2327. The first limiting portion 2328 is provided with first limiting grooves 23281 on two opposite outer sides, and the second limiting portion 2329 is provided with second limiting grooves 23291 on two opposite outer sides. In addition, the second limiting portion 2329 is provided with assembly holes 2330 on both outer sides, and the mounting posts 2334 of the limiting member 233 are mounted in the assembly holes 2330.

[0043] During installation, the mounting ring 236 is mounted on the base 231, the rotating member 232 is installed in the mounting ring 236, and then the limiting member 233 is mounted on the outer surface of the rotating member 232 and sleeved on the outer side of the limiting protrusion of the rotating member 232, the two ends of the main body 2331 are embedded in the second limiting groove 2391 on the outer side of the rotating member 232, and the clamping groove 2333 is clamped in the rotating teeth 2362 of the mounting ring 236. The outer cover 235 is mounted on the mounting ring 236, the guide column 2351 of the outer cover 235 is mounted in the positioning hole 2327 of the rotating member 232, the two limiting blocks 2352 are located on the two outer sides of the limiting protrusion of the rotating member 232, and the main body 2331 of the limiting member 233 is located on the outer side of the two limiting blocks 2352, and the outer side surface of the clamping portion 2332 of the limiting member 233 contacts the inner surface of the blocking block 2354 of the outer cover 235.

[0044] The two ends of the steel wire 24 respectively pass through the lower wire hole 217 and the lower mounting hole 222 in two opposite directions, are hung in the limit hook 223, and then extend toward the middle extension arm 213 through a plurality of upper mounting holes 221, and then pass upward through the first wire entrance 2326 and the second wire entrance 2325 on both sides of the rotator 23; pass through the first wire outlet 2324 and the second wire outlet; then, the two ends are connected and fixed to form a complete annular steel wire structure.

[0045] When working, the outer cover 235 is rotated, and the blocking block 2354 in the outer cover 235 pushes the rotating member 232 to rotate, and the steel wire 24 is wound around the rotating member, so that the distance between the adjustment frame 21 and the mounting frame 22 can be shortened, and the wearing circumference can be reduced. Reverse rotation will relax the wearing circumference. During the rotation adjustment process, the blocking block 2354 rotates and squeezes the limit member 233, and the locking portion 2332 of the limit member 233 moves inward, and the locking portion 2332 escapes from the rotating tooth 2362, so that the limit member 233 can achieve synchronous rotation with the rotating member. When the rotation is paused, the slot 2333 of the locking portion 2332 will be inserted into the corresponding rotating tooth 2362, so as to achieve positioning. In addition, by adjusting the length of the limit hole 161 extending upward from the extension arm 213, the upper and lower positions of the adjustment frame 21 can be adjusted. By adjusting the tightness, it can be suitable for people with different head circumferences and different back of the head heights. It has a wider range of applications and more precise adjustability. This manual adjustment method allows the wearer to adjust according to preference and comfort.

[0046] In summary, the beneficial effect of the utility model is that by designing an adjuster with elastic expansion effect, the rear head circumference of the helmet can be adjusted in the upper and lower positions and tightness according to the needs and usage habits, and the application range is wider, and the comfort and flexibility are better. In addition, the setting of the through hole 215 on the middle frame 211 is conducive to the long ponytail passing through the hole, so that the long ponytail will not stick to the neck, thereby improving the wearing comfort. The utility model is highly practical and has a strong promotion significance.

[0047] The above-mentioned embodiment only expresses one implementation method of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A helmet adjuster, mounted on a helmet body, characterized in that: It includes an adjusting frame, two mounting frames, a rotator, a steel wire and a limiting frame, the two mounting frames are respectively arranged on both sides of the adjusting frame, and the rotator is arranged on the front upper part of the mounting frame; the limiting frame is provided with a limiting hole, and the middle part of the top of the adjusting frame is provided with an extension arm, the extension arm is passed through the limiting hole, and the steel wire is passed through the mounting frame, the adjusting frame and the rotator; the rotator includes a base, a rotating member, a limiting member, an outer cover and a mounting ring which are arranged in sequence from bottom to top, the base is arranged on the outer surface of the helmet, the mounting ring is installed on the base, the rotating member is movably arranged in the base and the mounting ring, the limiting member is installed on the rotating member, the outer cover is installed on the mounting ring and covers the limiting member and the rotating member, and the inner surface of the outer cover is provided with two limiting blocks and two A blocking block, a limiting protrusion is arranged on the outer end surface of the rotating member, two limiting blocks extend on both sides of the limiting protrusion, two blocking members extend outside one end of the limiting protrusion, and the two limiting members are distributed in an eight-shaped shape; the limiting member includes a C-shaped main body and a clamping part arranged at both ends of the main body, the main body is arranged on the outside of the two limiting blocks, and the outer surfaces of the two clamping parts abut against the inner surface of the blocking member; rotating teeth are arranged on the inner side surface of the mounting ring, and a clamping groove is arranged at the outer end of the clamping member, and the clamping groove is clamped on the rotating teeth; two wire entry holes are arranged on the mounting ring, and a wire entry hole and a wire outlet hole are arranged on the rotating member, the steel wire enters the wire entry hole of the self-rotator, and passes through the wire entry hole, the wire outlet hole and the other wire entry hole on the same side.

2. The helmet adjuster according to claim 1, characterized in that: The adjustment frame is roughly W-shaped, including a middle frame, two brackets and an extension arm. The two brackets are respectively arranged on the left and right sides of the middle frame and are symmetrically arranged. The extension arm is arranged on the top of the middle frame and extends upward.

3. The helmet adjuster according to claim 2, characterized in that: The middle frame and the two brackets form a groove between the two brackets, and the groove is located at the bottom end of the middle frame; the middle of the middle frame and the brackets are both provided with through holes.

4. The helmet adjuster according to claim 1, characterized in that: The outer surface of the rotating member is provided with a limiting protrusion, the middle of the limiting protrusion is provided with a positioning hole, and a guide column is provided at a corresponding position of the outer cover, and the guide column is installed in the positioning hole.

5. The helmet adjuster according to claim 4, characterized in that: A first limiting portion and a second limiting portion are disposed on both outer sides of the positioning hole, a first limiting groove is disposed on two opposite outer sides of the first limiting portion, and a second limiting groove is disposed on two opposite outer sides of the second limiting portion.

6. The helmet adjuster according to claim 5, characterized in that: Both ends of the main body of the limiting member are embedded in the second limiting groove, and one side end of the limiting block is provided with a hook portion, and the hook portion is embedded in the first limiting groove.

7. The helmet adjuster according to claim 5, characterized in that: The rotating member is arranged in an I-shape, and includes a middle limiting shaft and limiting plates arranged at both ends of the limiting shaft. The outer diameter of the limiting plate is larger than the limiting shaft. The wire entry hole and the wire exit hole are both arranged on the limiting shaft.

8. The helmet adjuster according to claim 5, characterized in that: The inner surface of the extension arm is provided with limiting teeth arranged along the extension direction thereof, the extension arm is inserted into the limiting frame, and the limiting frame is provided with an extension block, which extends toward the direction of the limiting teeth and limits the limiting teeth.

9. A helmet, characterized in that: It includes a helmet body and an adjuster installed on the helmet body, the adjuster is the helmet adjuster according to any one of claims 1 to 8, the limit frame is installed in the middle position of the rear side of the helmet body, the extension arm is inserted into the limit hole from bottom to top, the two mounting frames are respectively installed on both sides of the helmet body, a hollow hole is provided in the middle of the rear side of the helmet body, a mounting strip extending in the front-rear direction is provided in the middle of the hollow hole, and the rotator is installed on the outer surface of the mounting strip.

10. The helmet according to claim 9, characterized in that: The adjustment frame includes a middle frame and two brackets. The middle of the middle frame and the brackets are both provided with through holes. The middle of the rear bottom end of the helmet body is provided with a receiving groove. The through hole and the mounting groove are arranged in an inner and outer correspondence.

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