Helmet rollover fixing device and helmet

Abstract

The present invention discloses a helmet rollover fixing device, comprising: two fixing buckles for connecting the left and right sides of the helmet body respectively; a chin strap, the two ends of which are respectively connected to the two fixing buckles; a forehead strap, the first end of which is connected to one of the fixing buckles, the second end of which is adjustably mounted on the other fixing buckle through a locking mechanism, the middle portion of which is suitable for connecting to the front side of the helmet body and can be pulled relative to the helmet body along the length direction of the forehead strap, and the forehead strap is suitable for being worn on the forehead of the user. The present invention also discloses a helmet. When the front side of the helmet body is subjected to an impact or a backward tilting force, the forehead strap is constrained by the forehead of the user and cannot be flipped backward with the fixing buckles as a fulcrum, thereby preventing the helmet body from flipping backward, ensuring that the helmet body can effectively protect the forehead and face of the user and reducing the occurrence of secondary accidents; the helmet can be easily removed by loosening the forehead strap and the chin strap.

Description

Technical Field

[0001] The invention relates to sports and safety protection equipment, and in particular to a helmet rolling fixing device and a helmet. Background Art

[0002] A helmet is a piece of equipment that protects the head. It can be divided into motorcycle helmets, bicycle helmets and safety helmets, etc. It plays a role in protecting the head from damage caused by impact objects. Therefore, there are high requirements for the helmet's anti-collision and impact properties.

[0003] Generally, helmets have a chin strap, which is worn on the user's chin. The two ends of the chin strap are respectively tied to the fixed buckles on the left and right sides of the helmet body. By adjusting the tightness of the chin strap, the helmet body can be worn relatively stably on the user's head to prevent it from getting loose. Of course, in order to ensure wearing comfort, the user usually leaves a gap of at least 1 cm between the chin strap and the chin when wearing it. However, the chin strap is difficult to solve the problem of the helmet rolling over after being hit. The rolling of the helmet can be generally understood as the helmet body flipping over with the fixed buckle as the fulcrum. Taking into account the actual application scenarios, for example, the user is thrown out of the car forward, trips, etc., it is often the front side of the helmet body that is hit or the force of the rear flip, causing the helmet body to flip backward, exposing the user's forehead and face to danger, which is prone to secondary impact and causes accidents. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a helmet rollover fixing device that can effectively prevent the helmet body from being flipped backward by impact.

[0005] The present invention also provides a helmet with the helmet rolling fixing device.

[0006] According to the first embodiment of the present invention, the helmet roll-over fixing device includes: two fixing buckles for respectively connecting the left and right sides of the helmet body; a chin strap, the two ends of which are respectively connected to the two fixing buckles; a forehead strap, the first end of the forehead strap is connected to one of the fixing buckles, and the second end of the forehead strap is adjustably mounted on the other fixing buckle through a locking mechanism, the middle part of the forehead strap is suitable for connecting to the front side of the helmet body and can be pulled relative to the helmet body along the length direction of the forehead strap, and the forehead strap is suitable for being worn on the forehead of the user.

[0007] At least the following beneficial effects are achieved: the helmet rollover fixing device adds a forehead strap on the basis of the chin strap, the first end of the forehead strap is connected to one of the fixed buckles, and the second end is installed on the other fixed buckle, the middle part of the forehead strap can be connected to the front side of the helmet body and can be pulled relative to the helmet body along the length direction of the forehead strap, the tightness of the forehead strap is adjusted by the locking mechanism, so that the forehead strap is worn on the forehead of the user, when the front side of the helmet body is hit or subjected to a backward force, the forehead strap is constrained by the forehead of the user and cannot be flipped backward with the fixed buckle as the fulcrum, thereby preventing the helmet body from flipping backward, ensuring that the helmet body can effectively protect the forehead and face of the user, and reducing the occurrence of secondary accidents; by loosening the forehead strap and the chin strap, the helmet can be easily taken off.

[0008] According to some embodiments of the present invention, the locking mechanism includes a fixed disk, a knob assembly and a mounting rack, the fixed disk is mounted on the fixed buckle, the knob assembly is rotatably mounted on the fixed disk, a gear is provided on the knob assembly, the gear is engaged with the mounting rack, and one end of the mounting rack is connected to the second end of the forehead strap.

[0009] According to some embodiments of the present invention, the inner ring of the fixed disk is provided with an inner ratchet, the knob assembly includes a knob dial and a knob disk, the knob dial is located in the fixed disk, the gear is mounted on the knob dial, the knob dial is provided with a toggle stop portion and an elastic pawl gradually extending outward from the toggle stop portion to the tooth groove of the inner ratchet, a toggle groove is formed between the elastic pawl and the toggle stop portion, a gap is provided between the elastic pawl and the knob dial, and a tool for inserting the gear is installed on the knob disk. The dial post in the toggle slot, when the knob disk rotates in a first direction, the dial post pushes the toggle stop portion and the elastic pawl slides over the back of the teeth of the inner ratchet, so that the knob toggle block rotates in the first direction, and the mounting rack tightens the forehead strap; when the knob disk rotates in a second direction opposite to the first direction, the dial post pushes and squeezes the elastic pawl inward to make the elastic pawl avoid the teeth of the inner ratchet, the knob toggle block rotates in the second direction, and the mounting rack loosens the forehead strap.

[0010] According to some embodiments of the present invention, the locking mechanism includes a fixed clamping block and a movable clamping block, the fixed clamping block is installed on the fixed belt buckle, the movable clamping block is rotatably connected to the fixed clamping block through a first rotating pin, and the upper end of the movable clamping block is provided with an engaging tooth facing the fixed clamping block, and the engaging tooth is used to press the forehead strap onto the fixed clamping block.

[0011] According to some embodiments of the present invention, a first elastic member is further provided between the fixed clamping block and the lower end of the movable clamping block, the first elastic member is used to drive the movable clamping block to rotate in the direction in which the engaging teeth press the forehead band, the locking mechanism also includes a limit block, one end of the limit block is rotatably connected to the fixed clamping block through a second rotating pin, the other end of the limit block is pressed against the lower end of the movable clamping block, one end of the limit block is also connected to the fixed clamping block through a second elastic member, the second elastic member is used to drive the limit block to rotate in a direction away from the lower end of the movable clamping block, so that the engaging teeth press the forehead band onto the fixed clamping block, and a pull rope is also hung on the other end of the limit block, and the pull rope is used to pull the limit block to rotate toward the direction of the lower end of the movable clamping block.

[0012] According to some embodiments of the present invention, the first elastic member is a compression spring, the second elastic member is a torsion spring, and the second elastic member is sleeved on the second rotating pin.

[0013] According to some embodiments of the present invention, the fixing buckle is provided with a limiting hole for the second end of the forehead strap to pass through.

[0014] According to some embodiments of the present invention, a rear drawstring is further included, wherein the first end of the rear drawstring is connected to one of the fixing buckles, and the second end of the rear drawstring is adjustably mounted on the other fixing buckle through a locking mechanism, the middle portion of the rear drawstring is suitable for connecting to the rear side of the helmet body and can be pulled relative to the helmet body along the length direction of the rear drawstring, and the rear drawstring is suitable for being worn on the back of the user's head.

[0015] According to some embodiments of the present invention, a first guide member and a second guide member are further included, the middle portion of the forehead strap is suitable for connecting to the front side of the helmet body through the first guide member, the first guide member is provided with a first guide hole, the first guide hole is for the forehead strap to pass through, the middle portion of the rear pull strap is suitable for connecting to the rear side of the helmet body through the second guide member, the second guide member is provided with a second guide hole, the second guide hole is for the rear pull strap to pass through.

[0016] The helmet according to the second embodiment of the present invention includes: a helmet roll fixing device as described in the first embodiment of the present invention; a helmet body, with two fixing buckles connected to the left and right sides respectively, and the front side of the helmet body connected to the middle part of the forehead strap.

[0017] At least the following beneficial effects are achieved: This helmet has all the beneficial effects brought about by the above-mentioned helmet rollover fixing device, which will not be repeated here.

[0018] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 is a side view of an embodiment of a helmet of the present invention;

[0021] Figure 2 for Figure 1 Schematic cross-sectional view of ;

[0022] Figure 3 A side view of a first embodiment of a helmet rollover securing device according to the present invention;

[0023] Figure 4 Another side view of the first embodiment of the helmet rollover securing device of the present invention;

[0024] Figure 5 This is a schematic structural diagram of a first embodiment of a helmet rollover fixing device according to the present invention;

[0025] Figure 6 This is a schematic structural diagram of the gears and knob blocks in the first embodiment of the helmet rollover fixing device of the present invention;

[0026] Figure 7 This is an exploded schematic diagram of the locking mechanism of the first embodiment of the helmet rollover fixing device of the present invention;

[0027] Figure 8 A rear view of a second embodiment of a helmet rollover securing device according to the present invention;

[0028] Figure 9 A side view of a second embodiment of a helmet rollover securing device according to the present invention;

[0029] Figure 10 Another side view of the second embodiment of the helmet rollover securing device of the present invention;

[0030] Figure 11 It is a structural schematic diagram of a second embodiment of the helmet rollover fixing device of the present invention;

[0031] Figure 12 A side view of a third embodiment of a helmet rollover securing device according to the present invention;

[0032] Figure 13 This is a schematic structural diagram of the third embodiment of the helmet rollover fixing device of the present invention when the locking mechanism fixes the forehead strap;

[0033] Figure 14 This is a schematic structural diagram of the third embodiment of the helmet rollover fixing device of the present invention when the locking mechanism releases the forehead strap;

[0034] Figure 15 2 is a schematic structural diagram of a fourth embodiment of a helmet rollover fixing device according to the present invention.

[0035] Figure numbers: helmet body 1, helmet roll fixing device 2, fixing buckle 21, limiting hole 211, chin strap 22, forehead strap 23, locking mechanism 24, fixing plate 241, knob assembly 242, gear 2421, knob dial block 2422, knob plate 2423, toggle stop 2424, elastic pawl 2425, toggle groove 2426, dial column 2427, mounting rack 243, inner ratchet 244, fixed clamping block 245, movable clamping block 246, first rotating pin 2461, engaging tooth 2462, limiting block 247, second rotating pin 2471, first elastic member 248, drawstring 249, second elastic member 2410, rear pull strap 25, first guide member 26, first guide hole 261, second guide member 27, second guide hole 271. DETAILED DESCRIPTION

[0036] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0038] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Reference Figures 1 to 15 The present invention discloses a helmet roll-over fixing device, the helmet roll-over fixing device 2 includes a chin strap 22, a forehead strap 23 and two fixing buckles 21.

[0041] Among them, reference Figure 1 、 Figure 3 、 Figure 4 and Figure 5 The two fixing buckles 21 are used to connect the left and right sides of the helmet body 1 respectively. The two ends of the chin strap 22 are respectively connected to the two fixing buckles 21. The chin strap 22 is suitable for being worn on the chin of the user, and plays the role of fixing the helmet body 1 to the user's head and being able to adjust the wearing tightness.

[0042] Reference Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 12 The first end of the forehead strap 23 is a fixed end, the first end of the forehead strap 23 is connected to one of the fixed buckles 21, the second end of the forehead strap 23 is an adjustable end, the second end of the forehead strap 23 is adjustably mounted on the other fixed buckle 21 through a locking mechanism 24, the middle portion of the forehead strap 23 is suitable for connecting to the front side of the helmet body 1 and can be pulled relative to the helmet body 1 along the length direction of the forehead strap 23, refer to Figure 2 The forehead band 23 is suitable for being worn on the forehead of the user.

[0043] The helmet rollover fixing device 2 is designed with a forehead strap 23 added on the basis of the chin strap 22. The tightness of the forehead strap 23 is adjusted by the locking mechanism 24 so that the forehead strap 23 is worn on the forehead of the user. When the front side of the helmet body 1 is hit or subjected to a backward tilting force, the forehead strap 23 is constrained by the forehead of the user and cannot be flipped backward with the fixed buckle 21 as a fulcrum, thereby preventing the helmet body 1 from flipping backward, ensuring that the helmet body 1 can effectively protect the forehead and face of the user and reducing the occurrence of secondary accidents. By loosening the forehead strap 23 and the chin strap 22, the helmet can be easily taken off.

[0044] In the first embodiment of the helmet rollover fixing device 2, refer to Figures 3 to 7 The locking mechanism 24 includes a fixed disk 241, a knob assembly 242 and a mounting rack 243. The fixed disk 241 is installed on the fixed buckle 21. The knob assembly 242 is rotatably installed on the fixed disk 241. A gear 2421 is provided on the knob assembly 242. The gear 2421 is engaged with the mounting rack 243. One end of the mounting rack 243 is connected to the second end of the forehead strap 23. The user can manually rotate the knob assembly 242 to drive the gear 2421 to rotate, and then drive the mounting rack 243 to move back and forth, thereby adjusting the tightness of the forehead strap 23.

[0045] Specific reference Figure 6 and Figure 7The inner ring of the fixed disk 241 is provided with an inner ratchet 244, and the knob assembly 242 includes a knob block 2422 and a knob disk 2423. The knob block 2422 is located in the fixed disk 241, and the gear 2421 is installed on the knob block 2422. The knob block 2422 is provided with a toggle stop portion 2424 and an elastic pawl 2425 gradually extending outward from the toggle stop portion 2424 to the tooth groove of the inner ratchet 244. A toggle groove 2426 is formed between the elastic pawl 2425 and the toggle stop portion 2424. There is a gap between the elastic pawl 2425 and the knob block 2422, so that the elastic pawl 2425 and the knob block 2422 can be compressed, and a dial column 2427 for inserting into the toggle groove 2426 is installed on the knob disk 2423.

[0046] When the knob 2423 rotates in the first direction, Figure 7 In the counterclockwise direction, the dial column 2427 pushes the dial stop portion 2424 and the elastic pawl 2425 slides over the tooth back of the inner ratchet 244, so that the knob dial block 2422 rotates in the first direction, installing the rack 243 to tighten the forehead strap 23.

[0047] When the knob disk 2423 rotates in a second direction opposite to the first direction, Figure 7 In the clockwise direction, the dial column 2427 pushes and squeezes the elastic pawl 2425 inward to make the elastic pawl 2425 avoid the gear teeth of the inner ratchet 244, and the knob dial block 2422 rotates in the second direction to install the rack 243 to loosen the forehead strap 23.

[0048] Therefore, refer to Figure 7 Only when the knob disk 2423 is manually rotated in the second direction, the gap between the elastic pawl 2425 and the knob dial block 2422 is compressed, so that the elastic pawl 2425 avoids the gear teeth of the inner ratchet 244 and the rack 243 is installed, can the forehead strap 23 be loosened. In other non-active adjustment situations, such as when the front side of the helmet body 1 is hit or tilted backward, the forehead strap 23 is subjected to a large tension, but the elastic pawl 2425 is blocked by the gear teeth of the inner ratchet 244 and cannot be rotated in the second direction. In other words, the elastic pawl 2425 cannot rotate in the second direction. Figure 7 If the helmet body 1 is rotated clockwise in the middle, the forehead strap 23 cannot be loosened without active adjustment. When the front side of the helmet body 1 is hit or tilted backward, the forehead strap 23 is always constrained by the user's forehead and will not loosen automatically, making it impossible for the helmet body 1 to flip backward with the fixed buckle 21 as the fulcrum, thereby preventing the helmet body 1 from flipping backward and ensuring that the helmet body 1 can effectively protect the user's forehead and face.

[0049] The second embodiment of the helmet rollover fixing device 2 is different from the first embodiment in that a rear pull strap 25 is added.

[0050] Reference Figures 8 to 11 The first end of the rear pull strap 25 is connected to one of the fixed buckles 21, and the second end of the rear pull strap 25 is adjustably mounted on the other fixed buckle 21 through a locking mechanism 24. The middle part of the rear pull strap 25 is suitable for connecting to the rear side of the helmet body 1 and can be pulled relative to the helmet body 1 along the length direction of the rear pull strap 25. The rear pull strap 25 is suitable for being worn on the back of the user's head.

[0051] It can be understood that the rear pull strap 25 will be constrained by the back of the user's head. First, it can assist the forehead strap 23 to a certain extent to prevent the front side of the helmet body 1 from flipping backward when it is hit or flipped backward; secondly, it can also prevent the back side of the helmet body 1 from flipping forward when it is hit or flipped forward, thereby protecting the back of the user's head.

[0052] Reference Figure 10 and Figure 11 In the second embodiment, a locking mechanism 24 is provided with two mounting racks 243 to respectively connect the forehead strap 23 and the rear strap 25. A gear 2421 is simultaneously engaged with the two mounting racks 243. By manually rotating the knob 2423 on one side, the tightness of the forehead strap 23 and the rear strap 25 can be adjusted simultaneously. The adjustment is simple and efficient, and it is very convenient to use.

[0053] In the third embodiment of the helmet rollover fixing device 2 , the locking mechanism 24 adopts a pulling adjustment structure, which is different from the rotation adjustment structure of the locking mechanism 24 in the first embodiment.

[0054] Reference Figures 12 to 14 The locking mechanism 24 includes a fixed clamping block 245 and a movable clamping block 246. The fixed clamping block 245 is installed on the fixed belt buckle 21. The movable clamping block 246 is rotatably connected to the fixed clamping block 245 through a first rotating pin 2461. The upper end of the movable clamping block 246 is provided with an engaging tooth 2462 facing the fixed clamping block 245. The engaging tooth 2462 is used to press the forehead strap 23 onto the fixed clamping block 245. By controlling the rotation of the movable clamping block 246, the forehead strap 23 can be fixed or loosened. When the forehead strap 23 is loosened, the tightness of the forehead strap 23 can be adjusted by first pulling the forehead strap 23 and then fixing the forehead strap 23.

[0055] Reference Figure 13 and Figure 14 A first elastic member 248 is also provided between the lower ends of the fixed clamping block 245 and the movable clamping block 246. The first elastic member 248 is used to drive the movable clamping block 246 to rotate in the direction of the engaging teeth 2462 to press the forehead band 23. The first elastic member 248 is specifically a compression spring; in addition, a first elastic member 248 in the form of a torsion spring can also be installed at the first rotating pin 2461.

[0056] In order to conveniently control the rotation of the movable clamping block 246, the locking mechanism 24 also includes a limit block 247, one end of the limit block 247 can be rotatably connected to the fixed clamping block 245 through a second rotating pin 2471, and the other end of the limit block 247 is pressed against the lower end of the movable clamping block 246. One end of the limit block 247 is also connected to the fixed clamping block 245 through a second elastic member 2410. The second elastic member 2410 is used to drive the limit block 247 to rotate in a direction away from the lower end of the movable clamping block 246, so that the engaging teeth 2462 press the forehead band 23 against the fixed clamping block 245. A pull rope 249 is also hung on the other end of the limit block 247, and the pull rope 249 is used to pull the limit block 247 to rotate toward the lower end of the movable clamping block 246.

[0057] Reference Figure 13 and Figure 14 By pulling the pull rope 249 downward, the limit block 247 can be moved along Figure 13 Rotate clockwise to Figure 14 The movable clamping block 246 is also rotated in the clockwise direction, thereby causing the engaging teeth 2462 to loosen the forehead strap 23.

[0058] It can be understood that the other end of the limit block 247 presses against the lower end of the movable clamping block 246, which means that the other end of the limit block 247 contacts the lower end of the movable clamping block 246 and has a tendency to drive the lower end of the movable clamping block 246 to compress the first elastic member 248.

[0059] Furthermore, the second elastic member 2410 can be specifically a torsion spring. The second elastic member 2410 is mounted on the second rotating pin 2471, with its ends respectively pressing against the fixed clamping block 245 and the stop block 247. The fixed buckle 21 is provided with a stop hole 211 through which the second end of the forehead strap 23 can pass. The stop hole 211 not only serves as a guide, but also prevents the second end of the forehead strap 23 from completely detaching from the fixed buckle 21 by virtue of the thickened design on the second end of the forehead strap 23.

[0060] The fourth embodiment of the helmet rollover fixing device 2 is different from the third embodiment in that a rear pull strap 25 is added.

[0061] Reference Figure 15 The first end of the rear pull strap 25 is connected to another fixed buckle 21, and the second end of the rear pull strap 25 is adjustably mounted on one of the fixed buckles 21 through a locking mechanism 24. The middle part of the rear pull strap 25 is suitable for connecting to the rear side of the helmet body 1 and can be pulled relative to the helmet body 1 along the length direction of the rear pull strap 25. The rear pull strap 25 is suitable for being worn on the back of the user's head.

[0062] In order to prevent the two locking mechanisms 24 from interfering with each other, the two locking mechanisms 24 can be installed on the two fixing buckles 21 respectively.

[0063] In some embodiments of the present invention, reference Figure 2 and Figure 8 , also includes a first guide member 26 and a second guide member 27. The middle part of the forehead strap 23 is suitable for connecting to the front side of the helmet body 1 through the first guide member 26. The first guide member 26 is provided with a first guide hole 261, and the first guide hole 261 is for the forehead strap 23 to pass through. The middle part of the back strap 25 is suitable for connecting to the back side of the helmet body 1 through the second guide member 27. The second guide member 27 is provided with a second guide hole 271, and the second guide hole 271 is for the back strap 25 to pass through. The first guide member 26 and the second guide member 27 can guide the forehead strap 23 and the back strap 25 respectively, and can also locate and correct the wearing positions of the forehead strap 23 and the back strap 25 so that they can be correctly worn on the forehead and back of the head of the user respectively.

[0064] Reference Figures 1 to 3 The present invention also discloses a helmet, comprising the above-mentioned helmet roll fixing device 2 and a helmet body 1, wherein the left and right sides of the helmet body 1 are respectively connected to two fixing buckles 21, and the front side of the helmet body 1 is connected to the middle of the forehead band 23.

[0065] When the front side of the helmet body 1 is hit or subjected to a backward tilting force, the forehead strap 23 is constrained by the user's forehead and cannot be flipped backward with the fixed buckle 21 as a fulcrum, thereby preventing the helmet body 1 from flipping backward, ensuring that the helmet body 1 can effectively protect the user's forehead and face, and reducing the occurrence of secondary accidents; by loosening the forehead strap 23 and the chin strap 22, the helmet can be easily taken off.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A helmet roll fixing device, characterized in that: include: Two fixed buckles, used to connect the left and right sides of the helmet respectively; A chin strap, with two ends respectively connected to the two fixing buckles; a forehead strap, wherein a first end of the forehead strap is connected to one of the fixing buckles, and a second end of the forehead strap is adjustably mounted on the other fixing buckle via a locking mechanism; a middle portion of the forehead strap is adapted to connect to the front side of the helmet body and can be pulled relative to the helmet body along the length of the forehead strap, and the forehead strap is adapted to be worn on the forehead of the user; The locking mechanism comprises a fixed clamping block, a dynamic clamping block and a limit block, the fixed clamping block is installed on the fixed belt buckle, the dynamic clamping block is rotatably connected to the fixed clamping block by a first rotating pin, the upper end of the dynamic clamping block is provided with a bite tooth facing the fixed clamping block, the bite tooth is used to press the forehead strap onto the fixed clamping block, and a first elastic member is further provided between the fixed clamping block and the lower end of the dynamic clamping block, the first elastic member is used to drive the dynamic clamping block to rotate along the direction in which the bite tooth presses the forehead strap, and the limit One end of the block is rotatably connected to the fixed clamping block through a second rotating pin, and the other end of the limit block is pressed against the lower end of the dynamic clamping block. One end of the limit block is also connected to the fixed clamping block through a second elastic member, and the second elastic member is used to drive the limit block to rotate in a direction away from the lower end of the dynamic clamping block, so that the engaging teeth press the forehead band onto the fixed clamping block, and a pull rope is hung on the other end of the limit block, and the pull rope is used to pull the limit block to rotate toward the direction of the lower end of the dynamic clamping block.

2. The helmet rollover fixing device according to claim 1, characterized in that: The first elastic member is a compression spring, the second elastic member is a torsion spring, and the second elastic member is sleeved on the second rotating pin.

3. The helmet rollover fixing device according to claim 1, characterized in that: The fixing buckle is provided with a limiting hole for the second end of the forehead strap to pass through.

4. The helmet rollover fixing device according to any one of claims 1 to 3, characterized in that: It also includes a rear drawstring, a first end of which is connected to one of the fixing buckles, and a second end of which is adjustably mounted on the other fixing buckle through a locking mechanism. The middle portion of the rear drawstring is suitable for connecting to the rear side of the helmet body and can be pulled relative to the helmet body along the length direction of the rear drawstring, and the rear drawstring is suitable for being worn on the back of the user's head.

5. The helmet rollover fixing device according to claim 4, characterized in that: It also includes a first guide member and a second guide member, the middle part of the forehead strap is suitable for connecting to the front side of the helmet body through the first guide member, the first guide member is provided with a first guide hole, the first guide hole is for the forehead strap to pass through, the middle part of the rear pull strap is suitable for connecting to the rear side of the helmet body through the second guide member, the second guide member is provided with a second guide hole, the second guide hole is for the rear pull strap to pass through.

6. A helmet, characterized in that include: The helmet rollover fixing device according to any one of claims 1 to 5; The left and right sides of the helmet body are respectively connected to the two fixing buckles, and the front side of the helmet body is connected to the middle part of the forehead strap.

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