Helmet

Abstract

The utility model provides a helmet and relates to the technical field of riding protection, in order to solve the problem that in the prior art, a jaw protector needs to cross over a protective cover to rotate to the rear side of the protective cover, the helmet comprises a helmet shell body and a protective body, the protective body comprises the protective cover and the jaw protector, the protective cover is rotatably connected to the jaw protector, and the protective body is connected to the protective cover. The jaw guard is rotatably connected to the helmet shell body through a connecting assembly, and a front opening right facing the face of a wearer can be formed between the protective cover and the jaw guard. According to the helmet, the jaw protector does not need to cross over the protective cover and rotate to the rear side of the protective cover, so that the design size of the jaw protector does not need to consider the size of the protective cover, the jaw protector and the protective cover are easy to lift and put down, and the helmet is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of cycling protection, in particular to a helmet. Background Art

[0002] Helmets, as head protection, are widely used in various fields, including transportation. For example, people are required to wear helmets when riding motorcycles, racing cars, electric bikes, or bicycles. Helmets primarily come in two types: full-face and half-face. Full-face helmets feature a chin guard that wraps around the wearer's chin, while half-face helmets lack one. Full-face helmets, with their chin guard, offer superior head protection.

[0003] The jaw guard of a traditional full-face helmet is manufactured as an integrated structure with the main body of the helmet shell, that is, the jaw guard is a fixed structural cloth relative to the main body of the helmet shell. Although this integrated structure of a traditional full-face helmet is strong and reliable, it is not flexible to use. When the wearer needs to drink water, talk on the phone, rest, etc., the helmet must be removed to complete the corresponding action. Therefore, a helmet has emerged in which the jaw guard is separated from the main body of the helmet shell to achieve the conversion between a full helmet and a half helmet. When the jaw guard is closed, it is similar to a full helmet. When the jaw guard is flipped up above the helmet body, it becomes a half helmet. Some helmets are also provided with a shield. The shield and jaw guard are both mounted on the main body of the helmet shell. The shield can be made and presented in an open or closed position relative to the main body of the helmet shell as needed.

[0004] The existing shield and jaw guard rotate on a fixed axis relative to the helmet shell body respectively. When the helmet is opened to form a half helmet, the jaw guard needs to rotate over the shield to the rear side of the shield. The shield and jaw guard need to be rotated separately. In order to ensure that the jaw guard can be rotated to the rear side of the helmet, a space needs to be left between the jaw guard and the shield, so the jaw guard is made larger, and the helmet as a whole appears bulky. When rotating, the jaw guard and the shield are easily stuck due to overlap, and the positioning effect of the shield and the jaw guard relative to the helmet shell body is poor. Utility Model Content

[0005] The purpose of the present invention is to provide a helmet to solve the problem in the prior art that the chin guard needs to be rotated over the shield to the rear side of the shield. The helmet of the present invention does not need the chin guard to be rotated over the shield to the rear side of the shield, so the design size of the chin guard does not need to take into account the size of the shield, making it easier to lift and lower the chin guard and the shield, and convenient to use.

[0006] A helmet provided by the utility model includes a helmet shell main body and a protective body. The protective body includes a mask and a chin guard. The mask is rotatably connected to the chin guard, and the chin guard is rotatably connected to the helmet shell main body through a connecting component, and a front opening facing the wearer's face can be formed between the mask and the chin guard.

[0007] As a preferred solution of the utility model, the connecting component includes a limiting plate connected to the helmet shell main body, and a first limiting column and a second limiting column arranged on the left and right sides of the chin guard. The limiting plate is respectively connected to the left and right sides of the helmet shell main body. The limiting plate is provided with a first limiting groove and a second limiting groove, and the first limiting column and the second limiting column are respectively arranged in the first limiting groove and the second limiting groove.

[0008] As a preferred solution of the utility model, a plurality of first gear grooves are arranged in the first limiting groove, and a plurality of second gear grooves are arranged in the second limiting groove. The second gear grooves are arranged corresponding to the first gear grooves. When the first limiting column is located in one of the first gear grooves, the second limiting column is located in the corresponding second gear groove.

[0009] As a preferred solution of the utility model, the connecting component further includes a connecting shaft mechanism. The left and right sides of the chin guard are respectively connected to the left and right sides of the helmet shell main body through the connecting shaft mechanism passing through the limiting plate. The connection line of the first gear groove and the corresponding second limiting groove is arranged through the connecting shaft mechanism.

[0010] As a preferred solution of the utility model, the limiting plate includes a fixing plate and an embedded plate. An embedded groove is arranged on the fixing plate, and a first arc groove and a second arc groove are arranged in the embedded groove. The embedded plate is installed in the embedded groove. The side of the embedded plate is correspondingly arranged on the first arc groove and forms the first limiting groove between the side of the embedded plate and the first arc groove. An inner sliding hole corresponding to the second arc groove is arranged on the embedded plate, and the inner sliding hole and the second arc groove form the second limiting groove.

[0011] As a preferred solution of the utility model, a limiting block is arranged at one end of the first limiting column close to the helmet shell main body. When the first limiting column is connected to the first limiting groove, the limiting block is limited between the embedded plate and the fixing plate.

[0012] As a preferred solution of the utility model, the connecting component further includes a lower limiting member. The lower limiting member is connected to the lower side of the helmet shell main body. A sliding block is arranged on the lower limiting member, and an outer sliding groove with a downward opening is arranged on the bottom edge of the chin guard. The sliding block is slidably connected to the outer sliding groove.

[0013] As a preferred solution of the present utility model, a limiting piece is provided inside the shield. When the shield rotates, the limiting piece can slide over the front top of the helmet shell body and be limited at the rear top of the helmet shell body.

[0014] As a preferred solution of the present utility model, the connecting shaft mechanism includes a bolt, an outer damping member and an inner damping member. The outer damping member includes a columnar portion and a sheet portion. The columnar portion is connected to the sheet portion. A notch is provided at one end of the columnar portion away from the sheet portion. A clamping block corresponding to the notch is provided on the limiting plate. The outer damping member passes through the guard jaw. The sheet portion is located outside the guard jaw and the notch is clamped on the clamping block. The inner damping member is connected to the inner side of the limiting plate. The bolt passes through the outer damping member, the limiting plate and the inner damping member and is connected to the helmet shell body.

[0015] As a preferred solution of the present utility model, mounting grooves are respectively provided on the left and right sides of the guard jaw. The left and right sides of the shield are respectively rotatably connected to the mounting grooves through rotating components. The bottom surface of the mounting groove is a bent curved surface. When the left and right sides of the shield are connected to the mounting grooves, the mounting grooves limit the opening angle between the guard jaw and the shield.

[0016] Compared with the prior art, the present utility model has the following positive effects:

[0017] The helmet provided by the present utility model includes a helmet shell body, a shield and a guard jaw. The shield is rotatably connected to the guard jaw. The guard jaw is rotatably connected to the helmet shell body through a connecting component. And a front opening facing the wearer's face can be formed between the shield and the guard jaw. The helmet of the present utility model drives the shield to rotate relative to the helmet shell body through the guard jaw, and it is not necessary for the guard jaw to rotate over the shield to the rear side of the shield. Therefore, the design size of the guard jaw does not need to consider the size of the shield, enabling the guard jaw to be designed more delicately and beautifully, and avoiding the guard jaw and the shield being stuck at the same position on the helmet shell body. And by rotatably connecting the shield to the guard jaw, only by rotating the guard jaw can the shield be simultaneously rotated. Therefore, the operations of lifting and lowering the guard jaw and the shield are relatively easy and can be completed with only one hand, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Schematic structural diagram of the helmet of the present utility model;

[0020] Figure 2 Exploded schematic diagram of the helmet of the present utility model;

[0021] Figure 3 Top view of the helmet of the present utility model;

[0022] Figure 4 is Figure 3 Cross-sectional view of A-A in

[0023] Figure 5 Exploded schematic diagram of the connecting shaft mechanism in the present utility model;

[0024] Figure 6 Front view of the helmet of the present utility model;

[0025] Figure 7 is Figure 6 Cross-sectional view of B-B in

[0026] Figure 8 is Figure 6 Cross-sectional view of C-C in

[0027] Figure 9 Schematic diagram when the fixing plate and the embedded plate in the present utility model are separated;

[0028] Figure 10 Schematic diagram when the jaw guard and the guard in the present utility model are separated.

[0029] In the figure: 1. Helmet shell main body; 2. Jaw guard; 21. First limiting column; 211. Limiting block; 22. Second limiting column; 23. Outer sliding groove; 24. Installation groove; 3. Guard; 31. Limiting piece; 4. Front opening; 5. Limiting plate; 51. Fixing plate; 511. Embedded groove; 512. First arc groove; 513. Second arc groove; 514. Clamping block; 52. Embedded plate; 521. Side; 522. Inner sliding hole; 523. Buffer hole; 53. First limiting groove; 531. First gear groove; 54. Second limiting groove; 541. Second gear groove; 6. Lower limiting part; 61. Slide block; 7. Connecting shaft mechanism; 71. Bolt; 72. Outer damping part; 721. Notch; 73. Inner damping part; 8. Rotating component. Specific embodiments

[0030] In the description of the present utility model, it should be noted that unless otherwise specified, the meaning of "multiple" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and for simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] The following further elaborates on the specific implementation manners of the present utility model in conjunction with the drawings.

[0033] Embodiment 1:

[0034] A helmet provided in this embodiment, as Figures 1 - 10 shown, includes a helmet shell main body 1 and a protective body. The protective body includes a face shield 3 and a chin guard 2. The helmet shell main body 1, the face shield 3 and the chin guard 2 can be made of alloy material, having good support strength. The helmet shell main body 1 is used to protect the brain, the face shield is used to protect the face, and the chin guard is used to protect parts such as the chin, mouth and nose, so as to comprehensively protect the head of the wearer.

[0035] The face shield 3 is rotatably connected to the chin guard 2, and the chin guard 2 is rotatably connected to the helmet shell main body 1 through a connecting component, and a front opening 4 facing the face of the wearer can be formed between the face shield 3 and the chin guard 2. When the wearer wears this helmet, corresponding to the front opening 4 on the face, the face shield 3 extends in front of the forehead of the wearer, which can block sunlight and will not affect the driver's line of sight when used in rainy days.

[0036] The helmet of this embodiment, as Figure 6 shown, is in the state of a full-face helmet. To change it into a half-face helmet, rotate the protective body counterclockwise relative to the helmet shell main body 1 until the face shield 3 is at position b of the helmet shell main body 1 and the chin guard 2 is at position a of the helmet shell main body 1, thus achieving the state of a half-face helmet.

[0037] In this embodiment, the helmet rotates the visor 3 relative to the helmet shell body 1 through the jaw guard 2, without the need for the jaw guard to rotate over the visor to the rear side of the visor. Therefore, the design size of the jaw guard 2 does not need to consider the size of the visor, enabling the jaw guard 2 to be designed more delicately and beautifully, and avoiding the jaw guard and the visor from getting stuck at the same position on the helmet shell body 1. And by rotatably connecting the visor 3 to the jaw guard 2, only by rotating the jaw guard 2 can the visor 3 be rotated simultaneously. Therefore, the operations of lifting and lowering the jaw guard 2 and the visor 3 are relatively easy and can be completed with only one hand, which is convenient for use.

[0038] As a preferred embodiment, as Figure 2 and Figure 4 shown, the connecting component includes a limiting plate 5 connected to the helmet shell body 1 and a first limiting column 21 and a second limiting column 22 provided on the left and right sides of the jaw guard 2. The first limiting column 21 and the second limiting column 22 are respectively arranged on the surfaces of the left and right sides of the jaw guard 2 close to each other.

[0039] The limiting plates 5 are respectively connected to the left and right sides of the helmet shell body 1, and the limiting plates 5 can be connected to the helmet shell body 1 by screws. The limiting plates 5 can be made of plastic or metal.

[0040] The limiting plate 5 is provided with a first limiting groove 53 and a second limiting groove 54. The first limiting column 21 and the second limiting column 22 are respectively arranged in the first limiting groove 53 and the second limiting groove 54. The length of the first limiting groove 53 is greater than the length of the second limiting groove 54.

[0041] In this embodiment, the jaw guard 2 is positioned at a certain position on the helmet shell body 1 by the positioning of the first limiting column 21 in the first limiting groove 53 and the positioning of the second limiting column 22 in the second limiting groove 54 at the same time. When the position of the jaw guard 2 needs to be adjusted, the first limiting column 21 slides in the first limiting groove 53, and the second limiting column 22 slides in the second limiting groove 54.

[0042] As a preferred embodiment, a plurality of first gear grooves 531 are provided in the first limiting groove 53, and the width of the first gear grooves 531 is greater than the width of the remaining sections of the first limiting groove 53. A plurality of second gear grooves 541 are provided in the second limiting groove 54, and the width of the second gear grooves 541 is greater than the width of the remaining sections of the second limiting groove 54.

[0043] The second gear grooves 541 are arranged corresponding to the first gear grooves 531. When the first limiting column 21 is located in a first gear groove 531, the second limiting column 22 is located in the corresponding second gear groove 541.

[0044] In this embodiment, the first gear slot 531 and the second gear slot 541 are provided to position the first limiting column 21 and the second limiting column 22 respectively. When the first limiting column 21 and the second limiting column 22 are located in the gear slots of different gears, the jaw guard 2 is positioned at different positions on the main body 1 of the helmet shell.

[0045] As a preferred embodiment, the connecting component further includes a connecting shaft mechanism 7. The left and right sides of the jaw guard 2 are respectively connected to the left and right sides of the main body 1 of the helmet shell through the connecting shaft mechanism 7 passing through the limiting plate 5. The connection line between the first gear slot 531 and the corresponding second limiting slot 54 is arranged through the connecting shaft mechanism 7.

[0046] The jaw guard 2 rotates relative to the main body 1 of the helmet shell with the connecting shaft mechanism 7 as the center. The first limiting slot 53 and the second limiting slot 54 are different arc segments centered on the connecting shaft mechanism 7. The second limiting slot 54 is arranged close to the connecting shaft mechanism 7.

[0047] In this embodiment, the jaw guard 2 and the main body 1 of the helmet shell are connected through the connecting component, ensuring a tight connection between the jaw guard 2 and the main body 1 of the helmet shell, making the connection more stable, and effectively preventing loosening caused by vibration or wind resistance.

[0048] As a preferred embodiment, as Figure 4 and Figure 5 shown, the limiting plate 5 includes a fixing plate 51 and an embedded plate 52. An embedded slot 511 is provided on the fixing plate 51, and the embedded plate 52 is installed in the embedded slot 511 to position and install the embedded plate 52. Both the embedded slot 511 and the embedded plate 52 are in a fan-shaped structure.

[0049] A first arc-shaped slot 512 and a second arc-shaped slot 513 are provided in the embedded slot 511. The side 521 of the embedded plate 52 is correspondingly arranged on the first arc-shaped slot 512, and a first limiting slot 53 is formed between the side 521 of the embedded plate 52 and the first arc-shaped slot 512. The length of the first arc-shaped slot 512 is greater than the length of the second arc-shaped slot 513.

[0050] An inner sliding hole 522 corresponding to the second arc-shaped slot 513 is provided on the embedded plate 52, and the inner sliding hole 522 and the second arc-shaped slot 513 form a second limiting slot 54. As Figure 9 shown, a buffer hole 523 is also provided on the embedded plate 52. A buffer hole 523 is provided near the side 521 of the embedded plate 52, and a buffer hole 523 is provided on each side of the inner sliding hole 522, making the sliding of the first limiting column 21 and the second limiting column 22 along the first limiting slot 53 and the second limiting slot 54 smoother, and the positioning effect of the first gear slot 531 and the second gear slot 541 on the first limiting column 21 and the second limiting column 22 better.

[0051] As a preferred embodiment, asFigure 2 As shown, a limiting block 211 is provided on one end of the first limiting column 21 close to the helmet shell body 1. When the first limiting column 21 is connected to the first limiting groove 53, the limiting block 211 is limited between the embedded plate 52 and the fixed plate 51, so that the jaw guard 2 is clamped with the limiting plate 5 through the first limiting column 21, and the rotation process of the jaw guard 2 is more stable, thereby preventing the jaw guard 2 from falling off when rotating relative to the helmet shell body 1.

[0052] As a preferred embodiment, Figure 1 and Figure 2 As shown, the connecting assembly also includes a lower stopper 6, which is connected to the underside of the helmet shell body 1. A slider 61 is provided on the lower stopper 6. A downwardly opening outer slot 23 is provided on the bottom edge of the jaw guard 2 and extends upward for a certain length. The slider 61 is slidably connected to the outer slot 23.

[0053] When the jaw guard 2 rotates downward relative to the helmet shell body 1 until the slider 61 slides to the top of the outer slide groove 23, the jaw guard cannot slide downward any further. Therefore, the downward rotation angle of the jaw guard 2 is limited by the structure of the slider 61 and the outer slide groove 23.

[0054] As a preferred embodiment, a limiting plate 31 is provided on the inner side of the shield 3, and the limiting plate 31 is located on the rear side of the shield 3. The limiting plate 31 has a certain elasticity, and when the limiting plate 31 is abutted against the top of the helmet shell body 1, it plays a damping and positioning role.

[0055] like Figure 6 As shown, when the shield 3 rotates, the limiting piece 31 can slide over the front top of the helmet shell body 1, that is, point a, and be limited at the rear top of the helmet shell body 1, that is, point b.

[0056] As a preferred embodiment, Figure 5 and Figure 7 As shown, the connecting shaft mechanism 7 includes a bolt 71, an external damping member 72, and an internal damping member 73. The external damping member 72 includes a columnar portion and a sheet-like portion. The columnar portion is connected to the sheet-like portion. A notch 721 is provided on the columnar portion at the end facing away from the sheet-like portion. A block 514 corresponding to the notch 721 is provided on the limiting plate 5. The external damping member 72 is disposed through the jaw guard 2 to provide a certain damping effect on the jaw guard 2. The sheet-like portion is located on the outside of the jaw guard 2, and the notch 721 is locked on the block 514 to prevent the external damping member 72 from rotating. The external damping member 72 can be made of an elastic, non-slip material. The internal damping member 73 is connected to the inside of the limiting plate 5 to provide a damping effect on the fixing plate 51. The bolt 71 passes through the external damping member 72, the limiting plate 5, and the internal damping member 73 to connect to the helmet shell body 1.

[0057] The connecting shaft mechanism 7 of this embodiment enables the jaw guard 2 to rotate relative to the helmet shell body 1, and at the same time plays a certain positioning role in the rotation position of the jaw guard 2, enabling the jaw guard 2 to open relative to the helmet shell body 1 and maintain a certain angle.

[0058] As a preferred embodiment, as Figure 10 shown, mounting grooves 24 are respectively provided on the left and right sides of the jaw guard 2, and the left and right sides of the guard 3 are respectively rotatably connected to the mounting grooves 24 through rotating components 8. The bottom surface of the mounting groove 24 is a bent curved surface. When the left and right sides of the guard 3 are connected to the mounting groove 24, the mounting groove 24 limits the opening angle between the jaw guard 2 and the guard 3. The guard 3 can rotate relative to the jaw guard 2 to the rear side of the helmet shell body 1. The bent curved surface structure of the mounting groove 24 limits the downward rotation angle of the guard 3, so that when the wearer uses it as a full-face helmet, the mounting groove 24 plays a good supporting role for the guard 3, preventing the guard 3 from falling and blocking the line of sight.

[0059] The rotating component 8 includes an inner damping member 73 and a bolt 71. The inner damping member 73 is arranged in the connecting hole of the jaw guard 2, and the bolt 71 passes through the guard 3 and the inner damping member 73. A serrated structure is arranged on the side of the inner damping member 73 contacting the jaw guard 2.

[0060] The helmet in this embodiment allows the wearer to quickly and easily adjust the opening states of the jaw guard and the guard through simple actions. In hot weather, the wearer can rotate the jaw guard and the guard to enjoy the cool breeze. At the same time, the hollow design of the helmet shell body 1, the jaw guard and the guard also ensures sufficient ventilation, avoiding the stuffy feeling caused by wearing the helmet for a long time. In case of strong sunlight or when sunshade is needed, the wearer can quickly close and lower the jaw guard and the guard to form a full-face helmet, which has excellent sunshade effect, can effectively prevent direct sunlight from shining into the eyes, and improve driving safety.

[0061] The helmet in this embodiment not only provides comprehensive safety protection for the wearer, but also integrates humanized design, making the ventilation and sunshade effects good. The helmet shell body 1, the jaw guard and the guard of the helmet are made of lightweight but strong materials, ensuring the comfort and safety of wearing.

[0062] The above is only the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can make several deformations and improvements without departing from the creative concept of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. A helmet, characterized in that: The invention comprises a helmet shell body (1) and a protective body, wherein the protective body comprises a protective shield (3) and a jaw guard (2), wherein the protective shield (3) is rotatably connected to the jaw guard (2), and the jaw guard (2) is rotatably connected to the helmet shell body (1) via a connecting assembly, and a front opening (4) facing the wearer's face can be formed between the protective shield (3) and the jaw guard (2).

2. A helmet according to claim 1, characterized in that: The connecting assembly comprises a limiting plate (5) connected to the helmet shell body (1) and a first limiting column (21) and a second limiting column (22) arranged on the left and right sides of the jaw guard (2); the limiting plate (5) is respectively connected to the left and right sides of the helmet shell body (1); a first limiting groove (53) and a second limiting groove (54) are arranged on the limiting plate (5); the first limiting column (21) and the second limiting column (22) are respectively arranged in the first limiting groove (53) and the second limiting groove (54).

3. A helmet according to claim 2, characterized in that: A plurality of first gear slots (531) are provided in the first limiting slot (53), and a plurality of second gear slots (541) are provided in the second limiting slot (54). The second gear slots (541) are provided corresponding to the first gear slots (531). When the first limiting column (21) is located in one of the first gear slots (531), the second limiting column (22) is located in the corresponding second gear slot (541).

4. A helmet according to claim 3, characterized in that: The connecting assembly further comprises a connecting shaft mechanism (7), and the left and right sides of the jaw guard (2) are respectively connected to the left and right sides of the helmet shell body (1) through the connecting shaft mechanism (7) and the limiting plate (5), and the connecting line between the first gear slot (531) and the corresponding second limiting slot (54) is set through the connecting shaft mechanism (7).

5. A helmet according to claim 2, characterized in that: The limiting plate (5) comprises a fixed plate (51) and an inner embedded plate (52), wherein an inner embedded groove (511) is provided on the fixed plate (51), wherein a first arc-shaped groove (512) and a second arc-shaped groove (513) are provided in the inner embedded groove (511), wherein the inner embedded plate (52) is installed in the inner embedded groove (511), wherein a side edge (521) of the inner embedded plate (52) is correspondingly provided on the first arc-shaped groove (512) so that the first limiting groove (53) is formed between the side edge (521) of the inner embedded plate (52) and the first arc-shaped groove (512), wherein an inner sliding hole (522) corresponding to the second arc-shaped groove (513) is provided on the inner embedded plate (52), and the inner sliding hole (522) and the second arc-shaped groove (513) form the second limiting groove (54).

6. A helmet according to claim 5, characterized in that: A limiting block (211) is provided on one end of the first limiting column (21) close to the helmet shell body (1); when the first limiting column (21) is connected to the first limiting groove (53), the limiting block (211) is limited between the inner panel (52) and the fixing plate (51).

7. A helmet according to claim 1, characterized in that: The connecting assembly further comprises a lower limiting member (6), the lower limiting member (6) being connected to the lower side of the helmet shell body (1), a slider (61) being provided on the lower limiting member (6), and an outer sliding groove (23) opening downwardly being provided on the bottom edge of the jaw guard (2), the slider (61) being slidably connected in the outer sliding groove (23).

8. A helmet according to claim 1, characterized in that: A limiting plate (31) is provided on the inner side of the shield (3); when the shield (3) rotates, the limiting plate (31) can slide over the front top of the helmet shell body (1) and be limited to the rear top of the helmet shell body (1).

9. A helmet according to claim 4, characterized in that: The connecting shaft mechanism (7) includes a bolt (71), an external damping member (72) and an internal damping member (73), the external damping member (72) includes a columnar portion and a sheet portion, the columnar portion is connected to the sheet portion, a notch (721) is provided on the end of the columnar portion away from the sheet portion, a clamping block (514) corresponding to the notch (721) is provided on the limiting plate (5), the external damping member (72) is arranged through the jaw guard (2), the sheet portion is located on the outside of the jaw guard (2) and the notch (721) is clamped on the clamping block (514), the internal damping member (73) is connected to the inside of the limiting plate (5), the bolt (71) passes through the external damping member (72), the limiting plate (5) and the internal damping member (73) and is connected to the helmet shell body (1).

10. A helmet according to claim 1, characterized in that: Mounting grooves (24) are respectively provided on the left and right sides of the guard jaw (2); the left and right sides of the guard cover (3) are rotatably connected to the mounting grooves (24) through a rotating assembly (8); the bottom surface of the mounting groove (24) is a bent curved surface; when the left and right sides of the guard cover (3) are connected to the mounting grooves (24), the mounting grooves (24) limit the opening angle between the guard jaw (2) and the guard cover (3).

Images