A fastening structure and a head protection device using the fastening structure.

Abstract

This utility model discloses a fastening structure and a head protection device using the fastening structure, relating to the field of structural installation technology. The fastening structure includes a first fastener and a second fastener. The second fastener contains a locking component, which is used to lock the first fastener onto the second fastener through a snap-fit ​​engagement, so that the functional components in the first fastener are electrically connected to the electronic components in the second fastener. The second fastener has a limiting platform that engages with the first fastener, limiting the first fastener from unlocking and separating along a first direction, allowing it to unlock and separate along a second direction. The first and second directions are perpendicular to each other. This utility model solves the problems of inconvenient unlocking operations and the easy damage to functional units due to springback separation in existing fastening structures.

Description

Technical Field

[0001] This utility model relates to the field of structural installation technology, and in particular to a fastening structure and a head protection device using the fastening structure. Background Technology

[0002] Head protection devices are protective equipment worn on the user's head, widely used in construction, mining, fire protection, power, transportation, sports, and many other fields. With technological advancements and increasing demands for intelligent and information-based working environments, integrating communication modules (such as wireless intercom modules, Bluetooth modules, sensor data transmission modules, and positioning modules) into these head protection devices has become an important development trend. These communication modules enable real-time communication between workers, remote communication with command centers, environmental data collection and transmission, and personnel location tracking, significantly improving operational efficiency, safety monitoring capabilities, and emergency response speed.

[0003] In the prior art, Chinese invention patent CN119073692B discloses a fastening device, including a method for releasably fastening a functional unit to a receiving unit in the connection direction, wherein a latching element is configured to substantially engage with an engaging element to lock the functional unit to the receiving unit; this fastening device utilizes a fixing element that can move between a fixed position and a released position to fasten or separate the functional unit from the receiving unit. However, in order to separate the functional unit from the receiving unit, the user must first, for example, use his / her fingers, such as his / her thumb, to move the fixing element from its fixed position to its released position, and then, for example, use other fingers of his / her corresponding hand to push the functional unit in the separation direction. On the one hand, this separation method requires the fixing element to be moved to the released position before the functional unit can be separated, which poses a certain difficulty for the user; on the other hand, after the fixing element is pressed to the released position, if the user does not firmly grasp the functional unit and push it, the functional unit can easily fly directly out in the separation direction under the rebound force of the spring-loaded tab, resulting in damage to the functional unit.

[0004] It is evident that the separation method of the fastening structure in the existing technology is inconvenient for unlocking operations, and the functional units are prone to flying out and being damaged due to springback separation. Utility Model Content

[0005] The purpose of this invention is to provide a fastening structure and a head protection device using the fastening structure, which solves the problems of inconvenient unlocking operation and easy damage to functional units due to springback separation in the existing fastening structure.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] According to the first aspect, the present invention provides a fastening structure, including a first fastener and a second fastener, wherein the second fastener is provided with a locking component, the locking component being used to lock the first fastener onto the second fastener by a snap-fit ​​engagement, so that the functional components in the first fastener are electrically connected to the electronic components in the second fastener.

[0008] The second fastener is provided with a limiting platform that engages with the first fastener. The limiting platform is used to restrict the first fastener from unlocking and separating along a first direction, so that the first fastener can be unlocked and separated along a second direction; the first direction and the second direction are perpendicular to each other.

[0009] Optionally, the locking assembly includes a locking seat and a locking push rod respectively movably connected to the second fastener. The locking seat engages with the first fastener, one end of the locking push rod is located inside the second fastener and abuts against the locking seat, and the other end of the locking push rod extends out of the second fastener. The locking push rod is used to unlock the locking seat and the first fastener.

[0010] Optionally, the locking seat is provided with a mounting post, the mounting post is fitted with a reset elastic element, and the second fastener is provided with a mounting surface that abuts against the reset elastic element.

[0011] Optionally, the locking seat is provided with a locking buckle, and the first fastener is provided with a snap-fit ​​part that engages with the locking buckle.

[0012] Optionally, the second fastener has a limiting wall for restricting the movement of the locking buckle, and the end of the locking buckle away from the locking push rod has a movable post, and the second fastener has a movable groove that movably engages with the movable post.

[0013] Optionally, the locking seat is provided with a first contact surface, and the locking push rod is provided with a second contact surface for abutting and engaging with the first contact surface.

[0014] Optionally, the second fastener has a limiting groove for limiting the travel of the locking push rod, and the locking push rod has a pushing part at one end located outside the second fastener.

[0015] Optionally, the number of locking seats and reset elastic elements is set to two, with each locking seat and reset elastic element cooperating with the other, and one end of the locking push rod located inside the second fastener abutting against the two locking seats respectively.

[0016] Optionally, the second fastener includes a first magnetic block and a second magnetic block that are magnetically connected to each other.

[0017] According to a second aspect, the present invention provides a head protection device, including a device body and a fastening structure as described in the first aspect, wherein the second fastener is mounted on the device body.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention provides a fastening structure that, by setting a limiting platform on the second fastener that engages with the first fastener, prevents the first fastener from separating directly along a first direction during unlocking and separation. Instead, it requires separation along a second direction perpendicular to the first direction, thus separating the unlocking and separation actions. On one hand, this structure simplifies the user's unlocking operation, reducing the complex actions of simultaneous pressing and pushing, and improving ease of operation. On the other hand, because the first direction is controlled by the limiting platform, it effectively prevents the first fastener from directly popping out along the first direction under the spring force of the locking component, avoiding damage to functional components due to drops or collisions. Furthermore, this invention improves the safety and service life of the fastening structure while maintaining reliable electrical connection between the functional components in the first fastener and the electronic components in the second fastener. Therefore, this invention solves the problems of inconvenient unlocking operations and the easy damage to functional units due to springback separation in existing fastening structures. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0022] Figure 1 A three-dimensional structural diagram of a fastening structure provided for an embodiment of this utility model;

[0023] Figure 2 An exploded view of a fastening structure provided for an embodiment of this utility model;

[0024] Figure 3 This is a first cross-sectional structural diagram of a fastening structure provided in an embodiment of the present utility model;

[0025] Figure 4 This is a second cross-sectional view of a fastening structure provided in an embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the first fastener in a fastening structure provided by an embodiment of the present utility model;

[0027] Figure 6 A partial explosion diagram of a fastening structure provided in an embodiment of this utility model;

[0028] Figure 7 This is an exploded structural diagram of the locking seat and locking push rod in a fastening structure provided for an embodiment of the present utility model.

[0029] Illustration:

[0030] 10. First fastener; 11. First fastening upper shell; 12. First fastening lower shell; 121. Snap-fit ​​part; 122. Slot;

[0031] 20. Second fastener; 21. Second fastening upper shell; 211. Limiting platform; 212. Mounting plane; 213. Limiting wall; 214. Movable groove; 215. Limiting groove; 22. Second fastening lower shell;

[0032] 30. Locking assembly; 31. Locking seat; 311. Mounting post; 312. Locking buckle; 313. Movable post; 314. First contact surface; 32. Locking push rod; 321. Second contact surface; 322. Pushing part; 323. Limiting part;

[0033] 40. The first magnetic block;

[0034] 50. The second magnetic block. Detailed Implementation

[0035] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0036] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] This utility model embodiment provides a fastening structure, such as Figures 1 to 7 As shown, it includes a first fastener 10 and a second fastener 20. The second fastener 20 is provided with a locking component 30, which is used to lock the first fastener 10 onto the second fastener 20 through a snap-fit ​​engagement, so that the functional components in the first fastener 10 are electrically connected to the electronic components in the second fastener 20. In this embodiment, the functional components can be communication components, camera components, acoustic components, sensor components or other functional components, and the electronic components can be devices such as PCB boards.

[0039] The second fastener 20 is provided with a limiting platform 211 that engages with the first fastener 10. The limiting platform 211 is used to restrict the first fastener 10 from unlocking and separating along a first direction, so that the first fastener 10 can be unlocked and separated along a second direction; the first direction and the second direction are perpendicular to each other. In this embodiment, the first direction is the unlocking direction, and the second direction is the separation direction.

[0040] It should be noted that the fastening structure provided by this utility model, by setting a limiting platform 211 on the second fastener 20 to engage with the first fastener 10, restricts the first fastener 10 from separating directly along the first direction during unlocking and separation. Instead, it requires separation along a second direction perpendicular to the first direction, thereby achieving directional separation between the unlocking and separation actions. On the one hand, this structure simplifies the user's unlocking operation, reduces the complex action of simultaneously pressing and pushing, and improves operational convenience. On the other hand, since the first direction is controlled by the limiting platform 211, it effectively prevents the first fastener 10 from directly popping out along the first direction under the rebound force of the locking component 30, avoiding damage to functional components due to drops or collisions. In addition, this utility model improves the safety and service life of the fastening structure while maintaining reliable electrical connection between the functional components in the first fastener 10 and the electronic components in the second fastener 20. Therefore, this utility model solves the problems of inconvenient unlocking operation and easy damage to functional units due to springback separation in the existing fastening structure.

[0041] like Figures 1 to 7 As shown, the locking assembly 30 includes a locking seat 31 and a locking push rod 32 that are movably connected to the second fastener 20. The locking seat 31 is engaged with the first fastener 10. One end of the locking push rod 32 is located inside the second fastener 20 and abuts against the locking seat 31. The other end of the locking push rod 32 extends out of the second fastener 20. The locking push rod 32 is used to unlock the locking seat 31 and the first fastener 10.

[0042] In practice, the locking seat 31 and the first fastener 10 are engaged to reliably lock the two together. Since one end of the locking push rod 32 is located inside the second fastener 20 and abuts against the locking seat 31, and the other end of the locking push rod 32 extends to the outside of the second fastener 20, the user can directly push the locking push rod 32 to release the engagement between the locking seat 31 and the first fastener 10, thereby completing the unlocking operation. This structure simplifies the unlocking process, allowing users to operate with one hand. It reduces the complex actions required in existing technologies, such as first using one finger to move the fixed component and then using another finger to push the functional unit, thus improving ease of operation and ergonomics. On the other hand, by setting the limiting platform 211 on the second fastener 20, the first fastener 10 can only be removed along the separation direction perpendicular to the unlocking direction. This effectively prevents the first fastener 10 from popping out directly under the rebound force of the locking component 30, avoiding damage to the functional component from falling or collision. This significantly improves the safety and reliability of the fastening structure, while maintaining a stable electrical connection between the functional component and the electronic component, extending the service life of the device.

[0043] like Figures 1 to 7As shown, the locking seat 31 is provided with a mounting post 311, and a reset elastic element (not shown) is sleeved on the mounting post 311. The second fastener 20 is provided with a mounting surface 212 that abuts against the reset elastic element (not shown). In this embodiment, the reset elastic element can be a reset spring or a reset sheet.

[0044] In practical implementation, by setting a mounting post 311 on the locking seat 31 and sleeved the reset elastic element on the mounting post 311, the reset elastic element can apply an elastic restoring force to the locking seat 31 after the locking assembly 30 is unlocked, ensuring that the locking seat 31 automatically returns to its original position and maintains the stability of the structure. One end of the reset elastic element abuts against the mounting plane 212 in the second fastener 20, and the other end is connected to the mounting post 311, so that the reset elastic element can automatically reset the locking seat 31 to its original position after the unlocking action is completed. This design effectively avoids structural instability after the unlocking operation and improves the durability and service life of the device.

[0045] like Figures 3 to 7 As shown, the locking seat 31 is provided with a locking buckle 312, and the first fastener 10 is provided with a snap-fit ​​part 121 that snaps into the locking buckle 312. The first fastener 10 includes a first fastening upper shell 11 and a first fastening lower shell 12 that are connected to each other. The connection relationship between the first fastening upper shell 11 and the first fastening lower shell 12 is not limited. The first fastening upper shell 11 and the first fastening lower shell 12 can be snap-fitted, ultrasonically welded, or fastened with screws. The first fastening lower shell 12 is provided with a slot 122 that engages with the limiting platform 211. The snap-fit ​​part 121 is provided in the first fastening lower shell 12. The snap-fit ​​part 121 and the first fastening lower shell 12 are integrally formed. The functional element is fixedly installed between the first fastening upper shell 11 and the first fastening lower shell 12. When the locking push rod 32 moves along the first direction, it pushes the locking seat 31 to move along the third direction, causing the locking buckle 312 to separate from the locking part 121. The first direction, the second direction, and the third direction are perpendicular to each other.

[0046] In this embodiment, a secure locking connection between the first fastener 10 and the second fastener 20 is achieved by providing a locking buckle 312 on the locking seat 31 and a locking part 121 on the first fastener 10 that engages with it. Because the locking part 121 and the first fastening lower shell 12 are integrally formed, the overall structure has high strength and good assembly precision, making it less prone to loosening or deformation due to long-term use. The first fastener 10 consists of an interconnected first fastening upper shell 11 and a first fastening lower shell 12, which can be connected by snap-fitting, ultrasonic welding, or screw fastening, providing greater flexibility and adaptability for production and assembly. The functional component is fixedly installed between the first fastening upper shell 11 and the first fastening lower shell 12, effectively preventing direct intrusion of external impacts, dust, and moisture into the functional component, thus improving the protective performance and service life of the functional component.

[0047] like Figures 3 to 7 As shown, the second fastener 20 has a limiting wall 213 for restricting the movement of the locking buckle 312. The end of the locking buckle 312 away from the locking push rod 32 has a movable post 313, and the second fastener 20 has a movable groove 214 that movably engages with the movable post 313. In this embodiment, the second fastener 20 includes a second upper fastening shell 21 and a second lower fastening shell 22 connected to each other. Electronic components are fixedly installed between the second upper fastening shell 21 and the second lower fastening shell 22. The number of movable posts 313 and movable grooves 214 are both two, with the two movable grooves 214 spaced apart on the same side wall of the second upper fastening shell 21. The connection relationship between the second upper fastening shell 21 and the second lower fastening shell 22 is not limited; the second upper fastening shell 21 and the second lower fastening shell 22 can be snap-fitted, ultrasonically welded, or fastened with screws.

[0048] In practical implementation, regarding structural safety, the second fastener 20 is equipped with a limiting wall 213. The limiting wall 213 is used to limit the movement of the locking buckle 312, preventing the locking buckle 312 from moving excessively or not in place during the unlocking process. A movable post 313 is provided at the end of the locking buckle 312 away from the locking push rod 32, and it movably engages with a movable groove 214 within the second fastener 20. There are two movable grooves 214, spaced apart on the same side wall of the second fastening upper shell 21. This multi-point positioning improves the stability and durability of the locking assembly 30 during the unlocking and locking processes.

[0049] like Figure 3 , Figure 4 and Figure 7As shown, the locking seat 31 is provided with a first contact surface 314, and the locking push rod 32 is provided with a second contact surface 321 for abutting and engaging with the first contact surface 314. In this embodiment, both the first contact surface 314 and the second contact surface 321 can be inclined surfaces, or both the first contact surface 314 and the second contact surface 321 can be arc surfaces.

[0050] When the user pushes the locking push rod 32 along the first direction, the second contact surface 321 slides along the first contact surface 314, smoothly converting the axial thrust of the locking push rod 32 into a thrust acting on the locking seat 31 along the third direction, thereby achieving smooth movement of the locking seat 31 and release of the latch. This structure optimizes the force transmission path of the unlocking action, making the operation smoother and more stable, and effectively avoiding the jamming and impact problems caused by traditional vertical or direct collision drive methods. On the other hand, the gradual transmission of force is achieved through the inclined surface cooperation, reducing the structural stress concentration during the unlocking process, extending the service life of the locking assembly 30, and improving the feel and controllability of the unlocking operation.

[0051] like Figures 3 to 6 As shown, the second fastener 20 has a limiting groove 215 for limiting the travel of the locking push rod 32, and the locking push rod 32 has a pushing part 322 at one end outside the second fastener 20. In this embodiment, the pushing part 322 and the locking push rod 32 are integrally formed, and the pushing part 322 has anti-slip protrusions.

[0052] In practical implementation, by setting a limiting groove 215 within the second fastener 20, the travel distance of the locking push rod 32 can be limited, making the displacement range of the locking push rod 32 controllable during unlocking operations. This avoids damage to the internal structure or incomplete separation of the latch due to excessive pushing, thereby improving the accuracy and safety of the unlocking action. The locking push rod 32 has a pushing part 322 at one end outside the second fastener 20. The pushing part 322 is integrally formed with the locking push rod 32, ensuring the strength and durability of the overall structure. The anti-slip protrusions on the pushing part 322 increase the friction with the user's fingers during operation, effectively preventing slippage even when hands are wet, gloves are worn, or the environment is harsh, thus improving the stability and reliability of the operation. This design not only optimizes the ergonomic experience but also further improves the safety and adaptability of the fastening structure.

[0053] like Figure 1 and Figure 2As shown, there are two locking seats 31 and two reset elastic elements. Each locking seat 31 and reset elastic element is paired individually. One end of the locking push rod 32, located within the second fastener 20, abuts against both locking seats 31, achieving a dual-point locking and dual-spring reset structure. On one hand, this design allows for simultaneous activation of both locking seats 31 during unlocking, resulting in a more even release of the latching engagement and avoiding jamming or misalignment caused by single-point force. On the other hand, the reset force provided by the dual springs is more evenly distributed and has higher redundancy, maintaining stable locking and reset performance even under long-term use or local component wear. Furthermore, the dual-locking structure has stronger resistance to loosening under external vibration or impact, significantly improving the reliability, safety, and service life of the fastening structure.

[0054] like Figure 6 As shown, the second fastener 20 contains a first magnetic block 40 and a second magnetic block 50 that are magnetically connected to each other. In this embodiment, the first fastener 10 contains a third magnetic block that magnetically engages with the first magnetic block 40 and a fourth magnetic block that magnetically engages with the second magnetic block 50.

[0055] In specific implementation, a multi-point magnetic positioning structure is achieved by setting a first magnetic block 40 and a second magnetic block 50 that are magnetically connected to each other within the second fastener 20, and installing a third magnetic block and a fourth magnetic block that magnetically cooperate with them within the first fastener 10. On the one hand, this structure can generate a guiding and adsorption effect during the assembly process of the first fastener 10 and the second fastener 20, so that the two automatically align and stably fit together when they are close together, reducing the difficulty of manual alignment and improving assembly efficiency and accuracy. On the other hand, the magnetic attraction can generate adhesion before the mechanical buckle is fully engaged, preventing parts from being misaligned or falling off due to hand slippage or external vibration during operation. In addition, the multi-point magnetic structure can provide moderate damping during unlocking and separation, preventing functional components from flying out instantly due to inertia or rebound, thereby further improving the safety and service life of the fastening structure.

[0056] Working Principle: This utility model provides a fastening structure in which a first fastener 10 and a second fastener 20 are locked together by a locking assembly 30. A limiting platform 211 is provided on the second fastener 20 to engage with the first fastener 10, preventing the first fastener 10 from separating directly along a first direction during unlocking. Instead, it must separate along a second direction perpendicular to the first direction, thus achieving directional separation between the unlocking and separating actions. Therefore, this utility model solves the problems of inconvenient unlocking operations and the potential for functional units to fly out and be damaged due to springback separation in existing fastening structures.

[0057] Specifically, when the first fastener 10 is unlocked and separated, the pushing part 322 of the locking push rod 32 is pushed, causing the second contact surface 321 to press against the first contact surface 314 of the locking seat 31. At the same time, the reset elastic element (not shown) contracts, and the locking push rod 32 moves along the third direction, causing the locking buckle 312 of the locking seat 31 to separate from the locking part 121 of the first fastening lower shell 12. At this time, due to the limiting engagement between the limiting platform 211 and the slot 122, the first fastener 10 cannot move and separate along the first direction. By moving the first fastener 10 along the second direction, the slot 122 of the first fastening lower shell 12 is separated from the limiting platform 211, thereby realizing the unlocking and separation of the first fastener 10.

[0058] This embodiment of the invention also provides a head protection device, including a device body and a fastening structure as described above, with a second fastener 20 mounted on the device body. The connection between the second fastener 20 and the device body is not limited; it can be magnetically attached or snap-fitted, etc. The device body can be a helmet, safety helmet, or other device worn on a user's head.

[0059] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fastening structure characterized by comprising: It includes a first fastener (10) and a second fastener (20). The second fastener (20) is provided with a locking component (30). The locking component (30) is used to lock the first fastener (10) onto the second fastener (20) by a snap-fit ​​engagement, so that the functional components in the first fastener (10) are electrically connected to the electronic components in the second fastener (20). The second fastener (20) is provided with a limiting platform (211) that is inserted and cooperates with the first fastener (10). The limiting platform (211) is used to restrict the first fastener (10) from being unlocked and separated along the first direction so that the first fastener (10) can be unlocked and separated along the second direction; the first direction and the second direction are perpendicular to each other.

2. The fastening structure according to claim 1, wherein The locking assembly (30) includes a locking seat (31) and a locking push rod (32) movably connected to the second fastener (20). The locking seat (31) engages with the first fastener (10). One end of the locking push rod (32) is located inside the second fastener (20) and abuts against the locking seat (31). The other end of the locking push rod (32) extends out of the second fastener (20). The locking push rod (32) is used to unlock the locking seat (31) and the first fastener (10).

3. The fastening structure according to claim 2, wherein The locking seat (31) is provided with a mounting post (311), and a reset elastic element is sleeved on the mounting post (311). The second fastener (20) is provided with a mounting surface (212) that abuts against the reset elastic element.

4. The fastening structure according to claim 2 or 3, characterized in that, The locking seat (31) is provided with a locking buckle (312), and the first fastener (10) is provided with a snap-fit ​​part (121) that snaps into the locking buckle (312).

5. The fastening structure according to claim 4, characterized in that, The second fastener (20) is provided with a limiting wall (213) for limiting the movement of the locking buckle (312). The locking buckle (312) is provided with a movable post (313) at one end away from the locking push rod (32). The second fastener (20) is provided with a movable groove (214) that movably engages with the movable post (313).

6. The fastening structure according to claim 5, characterized in that, The locking seat (31) is provided with a first contact surface (314), and the locking push rod (32) is provided with a second contact surface (321) for abutting and cooperating with the first contact surface (314).

7. The fastening structure according to claim 4, characterized in that, The second fastener (20) is provided with a limiting groove (215) for limiting the movement of the locking push rod (32), and the locking push rod (32) is provided with a pushing part (322) at one end outside the second fastener (20).

8. The fastening structure according to claim 3, characterized in that, The number of the locking seat (31) and the reset elastic element are both set to two. The locking seat (31) and the reset elastic element cooperate one by one. The locking push rod (32) located in the second fastener (20) abuts against the two locking seats (31) respectively.

9. The fastening structure according to claim 1, characterized in that, The second fastener (20) is provided with a first magnetic block (40) and a second magnetic block (50) that are magnetically connected to each other.

10. A head protection device, characterized in that, Includes a device body and a fastening structure as described in any one of claims 1 to 9, wherein the second fastener (20) is mounted on the device body.

Images