Variable jaw protection type helmet

Abstract

The utility model discloses a variable jaw protection type helmet which comprises a helmet shell, a protective cover and a jaw protector, the protective cover is rotationally connected to the helmet shell, and the center of the lower end of the protective cover is connected with an upper locking fastener; the protective jaw is rotationally connected to the helmet shell, the center of the upper end of the protective jaw is connected with a movable lower locking piece, the lower locking piece can be buckled to the upper locking piece and can be pressed to be unlocked, one of the upper locking piece and the lower locking piece is provided with a magnetic attraction piece, the other one of the upper locking piece and the lower locking piece is provided with a magnetic attraction part, the lower locking piece is provided with a first operation part, and the first operation part is provided with a second operation part. The jaw guard is provided with a sliding groove, and the first operation part penetrates through the sliding groove and extends out of the jaw guard. According to the scheme, unlocking can be achieved by pressing the first operation part, operation is convenient, the upper lock catch piece and the lower lock catch piece do not need to adopt slope lock catches, and the buckling force is improved; and when the upper lock catch piece and the lower lock catch piece are buckled, the magnetic attraction effect of the magnetic attraction piece and the magnetic attraction part is utilized, the connection stability is kept, accidental unlocking is prevented, and the safety of a user in the riding process is improved.

Description

Technical Field

[0001] This utility model relates to the field of helmet product technology, and in particular to a variable chin guard helmet. Background Technology

[0002] A variable chin guard helmet is a helmet whose chin guard structure can change its position according to riding needs. Specifically, it refers to a helmet where the chin guard can switch between a full-face helmet position and a half-face helmet position. The half-face helmet position refers to the chin guard being flipped over the visor (especially when the visor is fully open) and across the helmet's dome to reach the rear of the helmet. The biggest advantage of a variable chin guard helmet is that it combines the protective safety of a full-face helmet with the ease of use of a half-face helmet. Therefore, it is safe and reliable to use, and its ease of wearing and comfortable experience make it highly competitive in the market.

[0003] In related technologies, when the chin guard is in the full-face helmet position, a locking structure is provided between the chin guard and the visor to ensure the stability of the usage state. The locking structure can also meet the user's requirement to push open the visor and / or chin guard with one hand. Usually, a slanted buckle is used. During use, users have reported that there is play in the buckle, or even accidental unlocking, which affects the safety of riding. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems in the related art. To this end, the present invention provides a variable chin guard helmet that prevents accidental unlocking by improving the locking structure.

[0005] According to an embodiment of this utility model, a variable chin guard helmet is provided, including a helmet shell, a visor, and a chin guard. The visor is rotatably connected to the helmet shell, and an upper locking fastener is connected to the center of the lower end of the visor. The chin guard is rotatably connected to the helmet shell, and a movable lower locking fastener is connected to the center of the upper end of the chin guard. The lower locking fastener can be fastened to the upper locking fastener. One of the upper locking fastener and the lower locking fastener is provided with a magnetic attraction element, and the other is provided with a magnetic attraction part. The lower locking fastener is provided with a first operating part, and the chin guard is provided with a sliding groove. The first operating part passes through the sliding groove and extends to the outside of the chin guard.

[0006] A variable chin guard helmet according to an embodiment of this utility model has at least the following beneficial effects:

[0007] In this application, the locking buckle can be unlocked by pressing the first operating part of the lower locking buckle, which is convenient to operate. The upper and lower locking buckles do not need to use beveled locking buckles, which improves the locking force. Moreover, when the upper and lower locking buckles are locked, the magnetic attraction of the magnetic part and the magnetic attraction component maintains the stability of the connection, prevents accidental unlocking, and improves the user's safety while riding.

[0008] According to some embodiments of this utility model, the upper locking fastener is connected to a magnet to form the magnetic attraction part, and the lower locking fastener is an iron part or the lower locking fastener is connected to an iron part to form the magnetic attraction part.

[0009] According to some embodiments of the present invention, the lower locking fastener is hinged to the jaw guard, and an elastic element is connected to the back of the lower locking fastener facing the jaw guard. The elastic element contacts the jaw guard, and under the action of the elastic element, the lower locking fastener is held in a position that can be fastened to the upper locking fastener.

[0010] According to some embodiments of the present invention, the lower locking fastener includes a pressing member and a locking member, the lower end of the pressing member is hinged to the guard jaw, and the locking member is detachably connected to the upper end of the pressing member.

[0011] According to some embodiments of this utility model, the back of the pressing member is provided with a slot, the locking member is provided with a block installed in the slot, the contact surface between the block and the inner wall of the slot is an arc-shaped surface, the lower part of the locking member is provided with a mounting post, the elastic member is a spring and the spring is fitted onto the mounting post.

[0012] According to some embodiments of the present invention, a positioning post is provided on the back of the pressing member, and a through hole is provided in the middle of the locking member, wherein the minimum cross-section of the through hole is larger than the cross-section of the positioning post.

[0013] According to some embodiments of the present invention, the groove is a through hole penetrating the jaw guard, and a limiting side plate is provided at the outer end of the first operating part, the limiting side plate being able to abut against the jaw guard.

[0014] According to some embodiments of the present invention, the lower end of the jaw guard is connected to an unlocking component, the lower end of the unlocking component is provided with a second operating part, and a linkage mechanism is provided between the unlocking component and the lower locking buckle.

[0015] According to some embodiments of this utility model, the linkage mechanism is a pull ring, the upper end of the unlocking member is provided with a connecting part to connect to the lower end of the pull ring, and the lower locking buckle is provided with an actuating part that cooperates with the pull ring.

[0016] According to some embodiments of this utility model, the actuating part is a pushing inclined surface disposed on the front side of the lower locking fastener, the upper end of the pull ring contacts the pushing inclined surface, the unlocking member is rotatably connected to the jaw guard, and the pull ring is driven to move downward by the unlocking member, and the pull ring cooperates with the pushing inclined surface to drive the lower locking fastener to disengage from the upper locking fastener.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a cross-sectional view of a variable chin guard helmet according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A magnified view of a portion at point A;

[0021] Figure 3 This is a schematic diagram of the connection structure between the protective cover and the jaw guard in an embodiment of this utility model;

[0022] Figure 4 This is an exploded view of the connection structure of the upper locking fastener, lower locking fastener, and unlocking fastener in this embodiment of the utility model. Figure 1 ;

[0023] Figure 5 This is an exploded view of the connection structure of the upper locking fastener, lower locking fastener, and unlocking fastener in this embodiment of the utility model. Figure 2 .

[0024] Explanation of reference numerals in the attached figures:

[0025] Helmet shell 100, visor 200, including upper locking fastener 210, magnetic suction part 211, chin guard 300, lower locking fastener 310, magnetic suction part 311, pressing part 312, slot 3121, positioning post 3122, first operating part 3123, locking part 313, locking block 3131, mounting post 3132, through hole 3133, pushing slope 314, elastic part 320, unlocking part 330, second operating part 331, pull ring 332, connecting part 333, rotating shaft 334. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 5 This utility model proposes a variable chin guard helmet, which not only has the function of flexibly adjusting the chin guard, but also improves convenience and safety through an innovative locking device design.

[0031] The variable chin guard helmet of this application mainly comprises three parts: the shell 100, the visor 200, and the chin guard 300. The shell 100, as the main body of the helmet, is typically made of lightweight, high-strength materials, such as carbon fiber or reinforced plastic, to ensure the helmet's protective performance and wearing comfort. The visor 200 is rotatably connected to the front of the shell 100 to cover the face and protect the eyes and nose from external factors such as wind, sand, and flying debris. The chin guard 300 is rotatably connected to the lower part of the shell 100 to protect the chin and neck area. The shell 100 has a plane of symmetry, where a plane is a plane... Figure 1 (Cross-section): When the user is wearing the helmet normally, the symmetrical plane of the helmet shell 100 passes through the user's mouth, nose and top of the head and separates the user's eyes and ears on both sides of the symmetrical plane. That is, the symmetrical plane is an imaginary plane with the property of splitting the helmet shell 100 in the middle.

[0032] The guard 200 is connected to the helmet shell 100 via a rotating connection mechanism (such as a hinge or a rotating shaft), allowing the guard 200 to rotate up and down within a certain range, making it easy for the user to open or close the guard 200 as needed. A locking fastener 210 is located at the lower center of the guard 200 (at a position across the plane of symmetry). The locking fastener 210 is a component made of metal or plastic, and its shape and size are designed to easily match and engage with the lower locking fastener 310 of the jaw guard 300.

[0033] The chin guard 300 is also connected to the helmet shell 100 via a rotating connection mechanism, allowing the chin guard 300 to rotate back and forth within a certain range. A movable lower locking fastener 310 is located at the upper center of the chin guard 300 (across the plane of symmetry). The lower locking fastener 310 is a movable component, connected to the chin guard 300 via a spring or other elastic element, so that the lower locking fastener 310 can remain in the position of engaging the upper locking fastener 210 when no external force is applied.

[0034] The upper part of the lower locking fastener 310 matches and engages with the lower part of the upper locking fastener 210, for example, it can be adopted as follows: Figure 2 The hook-and-loop fastener structure shown, or other structures, allows the lower locking fastener 310 to engage with the upper locking fastener 210 when the chin guard 300 is in the full-face helmet position and the visor is closed, thus locking the chin guard 300 to the visor 200. Furthermore, the lower locking fastener 310 can be unlocked by pressing; the user only needs to press a part of the lower locking fastener 310 (such as the top or middle) to separate it from the upper locking fastener 210 and unlock it.

[0035] Understandably, to improve the connection stability and security between the jaw guard 300 and the guard cover 200, a magnetic attraction structure is provided between the upper locking fastener 210 and the lower locking fastener 310. This magnetic attraction structure includes a magnetic attractor 311 and a magnetic attractor portion 211. Specifically, the magnetic attractor 311 is located on one of the upper locking fastener 210 and the lower locking fastener 310, while the magnetic attractor portion 211 is located on the other. The magnetic attractor 311 and the magnetic attractor portion 211 can be made of magnets or magnetic alloys, generating a magnetic attraction force between them. This ensures that the upper locking fastener 210 and the lower locking fastener 310 are tightly engaged when locked, preventing accidental separation.

[0036] The specific positions and shapes of the magnetic element 311 and the magnetic part 211 can be designed according to actual needs. For example, the magnetic element 311 can be set as a small magnet inside the upper locking fastener 210, while the magnetic part 211 can be set as a magnetic area or component of the lower locking fastener 310 corresponding to the magnetic element 311. When the locking part of the lower locking fastener 310 is engaged with the upper locking fastener 210, the magnetic attraction between the magnetic element 311 and the magnetic part 211 will play an auxiliary locking role, making the locking state more secure and reliable.

[0037] To facilitate user operation, the lower locking fastener 310 is provided with a first operating part 3123, and the jaw guard 300 is provided with a sliding groove. The sliding groove can be open or closed. In some embodiments, the sliding groove is a through hole that passes through the jaw guard 300. The first operating part 3123 passes through the through hole and extends to the outside of the jaw guard 300. This not only allows the first operating part 3123 to be exposed within the reach of the user's hand, but also allows the pressing part 312 to be guided by the sliding groove during rotation, thereby ensuring that the pressing part 312 can accurately push the locking part 313 to unlock.

[0038] The variable chin guard helmet of this application has the following significant advantages in terms of ease of operation and safety:

[0039] Easy to operate: Users can unlock the locking buckle 310 with a simple pressing action, without complicated operation steps or tools, which allows users to quickly and conveniently open the guard 200 or adjust the position of the jaw guard 300 during riding to adapt to different riding needs.

[0040] Enhanced fastening force: The addition of a magnetic element 311 and a magnetic part 211 between the upper and lower fasteners 210 generates additional magnetic force when the buckle is engaged, thus improving the fastening force. This allows the helmet to better maintain its integrity during impacts or collisions, preventing accidental unlocking.

[0041] To prevent accidental unlocking: The magnetic attraction between the magnetic component 311 and the magnetic part 211 can effectively prevent the guard 200 and the jaw guard 300 from accidentally shifting or other abnormal situations. Even when encountering bumps or vibrations during riding, it can maintain a stable locking state, improving user safety.

[0042] Flexible adjustment: The connection structure between the guard 200 and the chin guard 300 allows users to flexibly choose to lock or unlock them according to actual needs. This provides users with greater comfort and convenience, especially during long rides or when frequent head movements are required.

[0043] In some embodiments of this utility model, the locking fastener 210 is cleverly designed to be connected with one or more magnets, which constitute the magnetic attraction part 211. The magnets not only have a strong attraction force, but also ensure that the connection can be quickly and stably achieved when the chin guard 300 part of the helmet needs to be adjusted or fixed.

[0044] Meanwhile, the lower locking fastener 310 is made of iron, or an iron component is attached to a suitable position on the lower locking fastener 310, thus forming a magnetic attraction component 311 corresponding to the magnet of the upper locking fastener 210. When the lower locking fastener 310 and the upper locking fastener 210 are close together, they can immediately achieve a tight connection through the magnetic attraction force, without the need for additional mechanical operation or tool assistance. In practical applications, users can easily adjust the position of the chin guard 300 as needed and quickly fix it through magnetic attraction, which not only improves the flexibility and convenience of the helmet, but also effectively reduces the difficulty of operation and enhances the user experience.

[0045] Reference Figure 1 and Figure 2 In some embodiments of this utility model, the lower locking fastener 310 is connected to the jaw guard 300 by a hinge. The hinge structure allows the lower locking fastener 310 to rotate relative to the jaw guard 300 within a certain range, thereby facilitating the engagement or disengagement of the lower locking fastener 310 and the upper locking fastener 210.

[0046] An elastic element 320 is connected to the back of the lower locking fastener 310 facing the chin guard 300. The elastic element 320 is in direct contact with the chin guard 300, and its elastic force keeps the lower locking fastener 310 in a position that allows it to be fastened to the upper locking fastener 210. This design ensures that the lower locking fastener 310 can automatically remain in the locked state without manual operation, thereby improving the stability and safety of the helmet.

[0047] In practical applications, when users need to adjust the position of the cover 200 or fix it, they only need to press the lower locking fastener 310 lightly to overcome the elastic force of the elastic element 320 and separate the lower locking fastener 310 from the upper locking fastener 210. The operation is simple and quick, improving the user experience.

[0048] Furthermore, based on the above embodiments, the lower locking fastener 310 is designed as a combination structure of pressing member 312 and locking member 313. The pressing member 312 and locking member 313 can be separated, making the structure of the lower locking fastener 310 more flexible and convenient for maintenance and replacement.

[0049] Specifically, the lower end of the pressing member 312 is hinged to the jaw guard 300, while the locking member 313 is detachably connected to the upper end of the pressing member 312. This allows the locking member 313 to be easily removed from the pressing member 312 as needed, facilitating cleaning, maintenance, or replacement. When the user needs to unlock, simply pressing the pressing member 312 will separate the locking member 313 from the locking buckle 210.

[0050] Reference Figure 4 and Figure 5 The pressing member 312 has a slot 3121 on its back, while the locking member 313 has a locking block 3131 installed in the slot 3121. The contact surface between the locking block 3131 and the inner wall of the slot 3121 is designed as an arc surface, and the inner wall of the slot 3121 can also be an arc surface. This design allows the locking member 313 to rotate relative to the pressing member 312 within a certain angle, so that even if the jaw guard 300 is deformed due to prolonged use or impact, it can still be unlocked at any time, improving security. A mounting post 3132 is provided at the lower part of the locking member 313, and the elastic member 320 (such as a spring) is fitted onto the mounting post 3132. This installation method allows the spring to be stably fixed between the locking member 313 and the jaw guard 300, providing continuous elastic support for the lower locking buckle 310. At the same time, the design of the mounting post 3132 also facilitates the replacement and maintenance of the spring. The 300 jaw guard also features grooves to position the spring, preventing it from shifting and improving reliability.

[0051] Reference Figure 4 and Figure 5 A positioning post 3122 is provided on the back of the pressing member 312, while a through hole 3133 is provided in the middle of the locking member 313. The positioning post 3122 passes through the through hole 3133, so that the locking member 313 can be guided by the positioning post 3122 during rotation, thereby ensuring that the locking member 313 can accurately engage with the slot 3121. The minimum cross-section of the through hole 3133 is designed to be larger than the cross-section of the positioning post 3122. This not only ensures that the positioning post 3122 can pass smoothly through the through hole 3133, but also gives the locking member 313 a certain degree of freedom during rotation. The locking member 313 has a seesaw-like function. Even if the pressing member 312 is misaligned due to the deformation of the guard jaw 300, the locking member 313 can still accurately engage with the upper locking fastener 210, meeting the usage requirements.

[0052] Furthermore, the first operating part 3123 is located at the upper end of the pressing member 312, and the user operates the pressing by operating the first operating part 3123. The first operating part 3123 can be brightly colored for easy user identification, and the first operating part 3123 is a protruding structure for easy user location. The outer end of the first operating part 3123 is also provided with a limiting side plate, which can abut against the guard 300 to prevent the first operating part 3123 from being completely retracted into the slide groove, thereby improving the reliability of use.

[0053] When the user needs to unlock, they simply press the first operating part 3123 with their finger, causing the pressing part 312 to rotate and compress the spring, thereby disengaging the locking part 313 from the locking buckle 210, thus unlocking the helmet and allowing the helmet visor 200 to be pushed open. After the user releases their hand, the spring returns to its original position, causing the locking part 313 to return to the engaged position. When the user needs to lock the chin guard 300 and the helmet visor 200, they simply press the first operating part 3123 again, move the helmet visor 200 to the closed position, and release their hand. The spring then pushes the locking part 313 to automatically engage with the locking buckle 210. The operation method is not only simple and quick, but also greatly improves the convenience and practicality of the helmet.

[0054] Reference Figure 3 In some embodiments of this utility model, an unlocking component 330 is connected to the lower end of the jaw guard 300. The lower end of the unlocking component 330 is provided with a second operating part 331, which is a part that is easy for the user to press to initiate the unlocking action. In addition, a linkage mechanism is provided between the unlocking component 330 and the lower locking buckle 310. The unlocking component 330 drives the lower locking buckle 310 through the linkage mechanism, thereby realizing unlocking.

[0055] Understandably, linkage mechanisms have various structural forms to choose from, such as Figure 4 and Figure 5 As shown, the specific structure of the linkage mechanism can adopt a pull ring 332. The upper end of the unlocking member 330 is provided with a connecting part 333, which is used to connect the lower end of the pull ring 332. For example, the connecting part 333 is provided with three staggered locking arms, which are L-shaped. The lower end of the pull ring 332 forms a first crossbar, which passes through the limiting groove formed by the three locking arms. The pull ring 332 is driven by the unlocking member 330 and can rotate relative to the unlocking member 330, facilitating installation and disassembly. Hooks are also provided below the three unlocking members 330, allowing the pull ring 332 to be hooked. Due to differences in height, different lower locking fasteners 310 are used, improving versatility.

[0056] The middle part of the unlocking component 330 is hinged to the jaw guard 300 via a pivot 334. When the user presses the second operating part 331, the unlocking component 330 rotates and drives the pull ring 332 to move down. The lower locking buckle 310 is provided with an action part that cooperates with the pull ring 332. The movement of the pull ring 332 can be effectively transmitted to the lower locking buckle 310, thereby triggering unlocking.

[0057] The actuating part is set as a pushing ramp 314 located on the front of the lower locking fastener 310. This design cleverly transforms the linear motion of the pull ring 332 into the rotational motion of the lower locking fastener 310, thereby achieving unlocking. A second crossbar is formed at the upper end of the pull ring 332 to contact the pushing ramp 314. When the user presses the second operating part 331, the unlocking part 330 drives the pull ring 332 to move downward. The second crossbar at the upper end of the pull ring 332 slides along the pushing ramp 314. This sliding process generates a lateral or downward component force, which acts on the lower locking fastener 310, causing it to disengage from the locked state with the upper locking fastener 210.

[0058] It is worth noting that the unlocking element 330 is designed to be rotatably connected to the jaw guard 300. When the pull ring 332 applies force by pushing the inclined plane 314, the unlocking element 330 can not only transmit this force but also rotate at a certain angle around its rotation axis. This design enhances the flexibility and reliability of the unlocking action. Furthermore, due to the reaction force of the elastic element 320, the user can feel a clear feedback when operating the unlocking element 330, which helps confirm whether the jaw guard 300 has been successfully unlocked.

[0059] Alternatively, the linkage mechanism can be a cable, with its two ends connected to the unlocking component 330 and the locking buckle 310, respectively. When the user presses the second operating part 331, the unlocking component 330 drives the locking buckle 310 via the cable, thus unlocking the device. Alternatively, the linkage mechanism can be a transmission rod. When the user presses the second operating part 331, the unlocking component 330 pushes the locking buckle 310 via the transmission rod, thus unlocking the device.

[0060] In actual use, when the user needs to unlock, he / she only needs to press the second operating part 331 below the jaw guard 300. The second operating part 331 is a protruding structure, which is easy to find and operate. The unlocking part 330 drives the pull ring 332 to move down. As the pull ring 332 moves down, the second horizontal bar at its upper end slides along the pushing slope 314 on the front of the lower locking fastener 310, so that the lower locking fastener 310 is pushed to disengage from the contact with the upper locking fastener 210, thereby unlocking.

[0061] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A variable chin guard helmet, characterized in that, include: Helmet shell; A protective cover is rotatably connected to the helmet shell, and a locking fastener is connected to the center of the lower end of the protective cover; The chin guard is rotatably connected to the helmet shell. A movable lower locking fastener is connected to the center of the upper end of the chin guard. The lower locking fastener can be fastened to the upper locking fastener. One of the upper locking fastener and the lower locking fastener is provided with a magnetic attraction element, and the other is provided with a magnetic attraction part. The lower locking fastener is provided with a first operating part. The chin guard is provided with a sliding groove. The first operating part passes through the sliding groove and extends to the outside of the chin guard.

2. A variable chin guard helmet according to claim 1, characterized in that, The upper locking fastener is connected to a magnet to form the magnetic attraction part, and the lower locking fastener is made of iron or is connected to an iron part to form the magnetic attraction part.

3. A variable chin guard helmet according to claim 1, characterized in that, The lower locking fastener is hinged to the jaw guard, and an elastic element is connected to the back of the lower locking fastener facing the jaw guard. The elastic element contacts the jaw guard, and under the action of the elastic element, the lower locking fastener is held in a position that can be fastened to the upper locking fastener.

4. A variable chin guard helmet according to claim 3, characterized in that, The lower locking fastener includes a pressing member and a locking member. The lower end of the pressing member is hinged to the guard jaw, and the locking member is detachably connected to the upper end of the pressing member.

5. A variable chin guard helmet according to claim 4, characterized in that, The pressing member has a slot on its back, the locking member has a block installed in the slot, the contact surface between the block and the inner wall of the slot is an arc-shaped surface, the lower part of the locking member has a mounting post, the elastic member is a spring and the spring is fitted onto the mounting post.

6. A variable chin guard helmet according to claim 5, characterized in that, The pressing member has a positioning post on its back side, and the locking member has a through hole in its middle part. The minimum cross-section of the through hole is larger than the cross-section of the positioning post.

7. A variable chin guard helmet according to claim 4, characterized in that, The groove is a through hole that passes through the jaw guard, and a limiting side plate is provided at the outer end of the first operating part, which can abut against the jaw guard.

8. A variable chin guard helmet according to claim 1, characterized in that, The lower end of the jaw guard is connected to an unlocking component, and the lower end of the unlocking component is provided with a second operating part. A linkage mechanism is provided between the unlocking component and the lower locking buckle.

9. A variable chin guard helmet according to claim 8, characterized in that, The linkage mechanism is a pull ring, the upper end of the unlocking component is provided with a connecting part to connect to the lower end of the pull ring, and the lower locking buckle is provided with an actuating part that cooperates with the pull ring.

10. A variable chin guard helmet according to claim 9, characterized in that, The actuating part is a pushing ramp provided on the front of the lower locking fastener. The upper end of the pull ring contacts the pushing ramp. The unlocking part is rotatably connected to the jaw guard. The unlocking part drives the pull ring to move down. The pull ring cooperates with the pushing ramp to drive the lower locking fastener to disengage from the upper locking fastener.

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