Helmet connecting structure

Abstract

A helmet connecting structure, comprising a helmet body (1). A mask (2) and a chin guard (3) are symmetrically hinged to two sides of the helmet body (1) respectively by means of a mask rotating component and a chin guard rotating component; mounting recesses (4) are symmetrically formed in the two sides of the helmet body (1); a mask rotation limiting member (5) and a rotating component mounting plate (6) are mounted in the mounting recesses (4); a mask mounting member (7) in the mask rotating component is mounted on the inner side of the rotating component mounting plate (6); the mask (2) is connected to a linkage guide annular member (8) of the chin guard (3) by means of the mask mounting member (7); the linkage guide annular member (8) is hingedly connected to the rotating component mounting plate (6) by means of a first rotating shaft (9); a driving block (11) matching the inner side of an annular groove (10) is provided in the annular groove (10) on the linkage guide annular member (8); the driving block (11) is connected, by means of a second rotating shaft (12) passing through the rotating component mounting plate (6), to the chin guard rotating component arranged on the outer side of the rotating component mounting plate (6); and the chin guard rotating component is separately connected to the rotating component mounting plate (6) and the chin guard (3).

Description

A connection structure for a helmet Technical Field

[0001] The present invention relates to the technical field of human body safety protection devices, and more particularly to a helmet for protecting the human head, more particularly to a helmet with a jaw protection structure, and more particularly to a chin guard, which can be rotated from the chin area of ​​the helmet to the rear of the helmet and can be rotated in conjunction with the face mask. Background Art

[0002] As we all know, users of various motor vehicles, racing cars, racing boats, balance cars, aircraft and even bicycles should wear helmets to protect the safety of their heads when operating the equipment; in addition, in many special work occasions, such as those working in spray painting workshops, firefighting and disaster relief, anti-terrorism and riot control, as well as mining, coal mining, excavation and other harsh environments, they also need to wear helmets to protect their heads from various unexpected injuries. At present, the structural types of helmets mainly include full-face structural helmets and half-face structural helmets. Among them, the full-face structural helmet is equipped with a chin guard that hugs the user's chin, while the half-face structural helmet does not have such a chin guard. As for the full-face structural helmet, because it has a chin guard structure, it can provide better safety protection for the wearer's head; and for the half-face structural head type helmet, because the wearer's mouth, nose and other organs are not restrained by the chin guard, it shows better user comfort.

[0003] Traditional full-face helmets utilize an integrated chin guard and helmet shell, meaning the chin guard is relatively fixed relative to the main shell. While this integrated structure is undoubtedly sturdy and reliable, providing adequate safety and protection for the wearer, it also has drawbacks. First, from a practical perspective, the wearer must remove the helmet before they can perform activities like drinking, talking on the phone, or resting, making this type of helmet inherently awkward and inconvenient. Second, from a production perspective, the large internal cavity with a small notch makes molds very complex, resulting in low production efficiency. This contributes to the high manufacturing cost of integrated full-face helmets.

[0004] Obviously, traditional one-piece full-face helmets cannot meet the multiple requirements of safety, convenience, and low cost. In view of this, developing a helmet that combines the advantages and features of a full-face helmet structure with the advantages and features of a half-face helmet structure has naturally become the goal currently pursued by helmet researchers and manufacturers.

[0005] Chinese patent application CN105901820A proposes a "Gear-Constrained Variable Chin Guard Helmet." The invention's key features lie in the following: a cylindrical gear-type fixed internal gear is positioned on either side of the helmet shell. Two corresponding cylindrical gear-type rotating external gears are secured to the two forks of the chin guard. A corresponding arc-shaped constraint groove is provided on a base fastened to the helmet shell. These constraint grooves constrain the rotating external gear and the fixed internal gear, maintaining meshing and forming a kinematic pair. This constrains the position and posture of the chin guard according to predetermined process requirements, ultimately enabling the chin guard to follow a planned trajectory between a full-face helmet configuration and a half-face helmet configuration, with reversible transitions. In other words, the chin guard can be opened from a full-face helmet configuration to a half-face helmet configuration, and vice versa, as needed. Furthermore, since the chin guard is no longer integral to the helmet shell, the mold for the helmet is simplified, reducing manufacturing costs and improving production efficiency. Obviously, the gear-constrained variable jaw guard structure solution provided by the above patent application can better address the multi-objective requirements of safety, convenience and low cost, thereby promoting the advancement of helmet technology.

[0006] However, although the variable chin guard structure helmet proposed in Chinese patent application CN105901820A has obvious advantages, it requires a long arc-shaped constraint groove with a through-hole characteristic to maintain the meshing relationship between its rotating external gear and the fixed internal gear, and its rotating external gear swings with the chin guard at a large angle, which also brings several disadvantages. Specifically, it is manifested as follows: 1) The long and arc-shaped constraint groove makes the reliability of the helmet a hidden danger. This is because when the chin guard is in the process of changing its position, especially when the chin guard is in a position between the full helmet structure and the half helmet structure, When the helmet is in a flip-up position to form a so-called flip-up helmet (the helmet in this case is a "quasi-half-helmet structure helmet", which is convenient for the wearer to drink water, talk, and temporarily breathe, and is particularly suitable for tunnel work), the jaw guard cannot completely cover the constraint groove, that is, the jaw guard handle cannot effectively cover the through-shaped long arc-shaped constraint groove, resulting in an opportunity for foreign matter to enter the meshing motion pair composed of the rotating external gear and the fixed internal gear. Once this happens, the gear constraint pair is very likely to get stuck. In other words, there are indeed certain risks to the reliability of the helmet during use; ) The presence of the long, arc-shaped constraint grooves also makes the helmet noisy. This is also because the chin guard needs to be in a position between the full helmet structure and the half helmet structure during the process of changing its position, forming a so-called flip-up helmet. For the rider, the chin guard cannot completely cover the constraint grooves, causing the whistling sound generated by the external airflow flowing through the outer surface of the helmet to be easily transmitted into the interior of the helmet through the through-shaped constraint grooves. It is noted that these constraint grooves are arranged near the wearer's two ears, so the sound insulation effect of the helmet is poor or its comfort is poor; 3) The external gear that rotates like a planet The layout and operation mode weaken the safety of the helmet to a certain extent. This is because when the jaw guard changes its structural position, the external gear moves with the jaw guard and exhibits a planetary rotation behavior. It is not difficult to find that the spatial area it sweeps is relatively large. In the spatial area where the external gear rotates, it is obviously impossible to arrange fastening screws or other fastening structures. At this time, the base with a long arc constraint groove will be forced to be arranged into a thin shell-like component with a larger span. It is well known that the intrinsic stiffness of components in this structural form is relatively small, which means that the stiffness of the helmet shell is weaker. In other words, the safety of the helmet is weakened.

[0007] In addition, Chinese patent CN 210124365 U discloses a gear-constrained variable jaw guard structure helmet. It includes a helmet shell body, a jaw guard, and a fork handle on the jaw guard. The base, fork handle, internal gear, external gear, and transmission element form a linkage mechanism. The internal and external gears rotate on fixed axes and form a meshing constraint pair. The internal gear and fork handle slide together to form a sliding constraint pair. The transmission element transmits the motion of the external gear to the fork handle, causing the jaw guard to produce telescopic displacement relative to the helmet shell body. This achieves both a tilting motion of the jaw guard and a reciprocating motion, thereby enabling the jaw guard to switch between a full-face and a half-face position. Because the fork handle can cover the slot on the internal gear during the jaw guard's tilting process, it prevents foreign matter from entering the gear pair, ensuring the helmet's reliability and blocking external noise from entering the helmet, improving the helmet's comfort. The fixed-axis rotating gear occupies less space, creating conditions for increasing the rigidity of related components, thereby improving the helmet's safety. However, the structure of the helmet is very complicated, which makes it difficult to manufacture and use. In addition, the helmet is heavy, has high manufacturing costs, a short service life, and is easily damaged.

[0008] Chinese patent CN111264968A also discloses a chin guard positioning assembly and a helmet having the same. The assembly connects a helmet body that covers the user's head and a chin guard. The chin guard moves from a protective position to an open position or vice versa. The assembly includes: a movable base portion connected to the chin guard and capable of moving with the chin guard; a fixed base portion connected to the helmet body and the movable base portion, serving as a reference for the movable base portion's movement; a fixed magnetic portion fixed to the fixed base portion; and a movable magnetic portion that interacts with the fixed magnetic portion to secure the movable base portion to a first or second position. This helmet also suffers from complex structural design, making it difficult to manufacture and use. Furthermore, it is heavy, expensive to manufacture, has a short service life, and is easily damaged.

[0009] In summary, there is still room for further improvement and enhancement of the existing helmets with variable jaw guard structures. Summary of the Invention

[0010] The purpose of the present invention is to overcome the defects of the prior art and provide a connection structure for a rotating chin guard on a helmet with a simple structure, a small number of parts, simple processing and manufacturing, easy use, long service life and light overall weight of the helmet.

[0011] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a connection structure of a helmet, the helmet includes a helmet main body, a mask and a chin guard are symmetrically hinged on both sides of the helmet main body through a mask rotating part and a chin guard rotating part respectively, mounting grooves are symmetrically provided on both sides of the helmet main body, a mask rotation limiter and a rotating part mounting plate are installed in the mounting grooves, a mask mounting part in the mask rotating part is installed on the inner side of the rotating part mounting plate, the mask is connected to the chin guard through the mask mounting part and the linkage guide ring part of the chin guard, the linkage guide ring part is hinged to the rotating part mounting plate through a first rotating shaft, a driving block matching the inner side of the annular groove is provided in the annular groove on the linkage guide ring part, the driving block passes through the rotating part mounting plate through a second rotating shaft and is connected to the chin guard rotating part arranged on the outer side of the rotating part mounting plate, and the chin guard rotating part is connected to the rotating part mounting plate and the chin guard respectively.

[0012] In order to facilitate hiding the mask rotating component and the chin guard rotating component inside the helmet body to prevent them from being damaged and to achieve an aesthetically pleasing appearance, the preferred technical solution is that the mounting grooves are symmetrically arranged on both sides of the helmet body, and are respectively arranged as inwardly concave grooves, and the grooves have a two-layer stepped groove structure. The two layers of grooves are respectively the mask rotation limiter mounting groove located on the second layer and the rotating component mounting plate mounting groove located on the first layer. The shape of the mask rotation limiter mounting groove is adapted to the shape of the mask rotation limiter, and the shape of the rotating component mounting plate mounting groove is adapted to the shape of the rotating component mounting plate.

[0013] In order to effectively limit the rotation range of the mask, and at the same time ensure that the mask will not automatically slide down after being rotated to a predetermined position, or cause the mask to swing up and down due to the vibration and bumps of the helmet body when the helmet is worn, a preferred technical solution is that the mask rotation limiter includes a strip slider and a strip rod. The two ends of the strip rod are connected to the mounting groove by fasteners, and one side of the strip rod is connected to the strip slider by an elastic member. One side of the strip slider is provided with an arc groove for positioning the mask, and a plurality of arc grooves with different curvature radii are provided on the arc groove to form a toothed arc limiting guide groove. The strip rod and the strip slider are respectively shell structures, and the concave cavity side of the strip rod and the strip slider faces the mounting groove.

[0014] In order to facilitate the connection between the mask and the linkage guide ring part and to simplify the installation operation, a preferred technical solution is that the linkage guide ring part is a C-shaped open ring structure, one end of the linkage guide ring part of the C-shaped open ring structure is connected to the mask mounting part, and a columnar protrusion facing the mounting groove is provided near the connection part, and the columnar protrusion cooperates with the arc groove to form a limit for the mask; a first mounting hole of the first rotating shaft is provided near the other end of the C-shaped open ring linkage guide ring part, and a second mounting hole of the first rotating shaft is provided on the rotating component mounting plate, and the first rotating shaft installs the linkage guide ring part and the mask mounting part on the rotating component mounting plate through the first mounting hole, the second mounting hole and the fastener, and enables the linkage guide ring part and the mask mounting part to rotate on the rotating component mounting plate around the first rotating shaft.

[0015] In order to minimize the structural size of the linkage guide ring, reduce the weight of the linkage guide ring, facilitate the connection between the linkage guide ring and the rotating component mounting plate, and facilitate the rotation of the mask around the second rotating axis and be able to stay in a predetermined position without slipping, the preferred technical solution is that the mask mounting part is a strip-shaped arc surface structure, the outer arc surface side of the strip-shaped arc surface is used to connect with the mask, and the inner arc surface side of the strip-shaped arc surface is used to connect with the linkage guide ring, or the mask mounting part and the linkage guide ring form an integral structure, the strip-shaped arc surface is provided with a slot and / or a convex edge on the outer arc surface side for connecting with the mask, and the width of the strip-shaped arc surface is greater than the width of the linkage guide ring.

[0016] In order to facilitate the driving block to be driven by the chin guard and the chin guard rotating component, the driving linkage guide ring is driven to rotate around the second rotating shaft and the mask is driven to rotate together, a preferred technical solution is that the driving block is a triangular sheet body, a through hole is provided in the center of the triangular sheet body, and convex teeth are provided on the periphery of the through hole on the side of the triangular sheet body facing the rotating component mounting plate.

[0017] In order to facilitate the guidance and limitation of the motion trajectory of the driving block, and to facilitate the installation of the chin guard rotating component on the rotating component mounting plate, and at the same time to minimize the structural size and weight of the rotating component mounting plate, a further preferred technical solution is that the rotating component mounting plate is a D-shaped shell structure, and the D-shaped shell structure is provided with a flange on the side facing the mounting groove, wherein the flange on the vertical straight side of the D-shaped shell structure is a stepped flange, and a C-shaped guide groove is provided on the rotating component mounting plate of the D-shaped shell structure, and a through hole for the second rotating shaft to pass through is provided on the D-shaped shell surrounded by the C-shaped guide groove, and a mounting hole is also provided on the rotating component mounting plate of the D-shaped shell structure, and the mounting hole fixes the rotating component mounting plate to the mounting groove through a fastener.

[0018] In order to facilitate guiding and limiting the motion trajectory of the driving block, and to facilitate installing the chin guard rotating component on the rotating component mounting plate, and at the same time to minimize the structural size and weight of the rotating component mounting plate, a further preferred technical solution is that the chin guard rotating component includes a driving gear, which is meshed with a driven gear. The driven gear is fixedly installed near one end of the C-shaped guide groove through a fixed shaft. The center of the driving gear is provided with a stepped hole that cooperates with the second rotating shaft. The second rotating shaft is a hollow shaft. One end of the second rotating shaft is provided with an end cap that cooperates with the stepped hole. The other end of the second rotating shaft is provided with a radial groove. The other end of the second rotating shaft passes through the stepped hole and the through hole on the driving block and cooperates with a protrusion on a boss set in the mounting groove. The hollow shaft of the second rotating shaft is connected to the mounting hole on the boss through a fastener; the driving gear is provided with a chin guard plug-in groove and a connecting hole on the annular surface between the driving tooth and the stepped hole, and the driving gear is provided with a groove on the other side annular surface between the driving tooth and the stepped hole that engages with the convex tooth on the driving block.

[0019] In order to facilitate guiding and limiting the motion trajectory of the driving block, and to facilitate installing the chin guard rotating component on the rotating component mounting plate, and at the same time to minimize the structural size and weight of the rotating component mounting plate, a further preferred technical solution is that the driving gear is an incomplete gear, and the incomplete gear is provided with a protrusion on the annular surface without teeth, and the protrusion is provided with a radial positioning groove, and the protrusion protrudes from the side of the driving gear toward the rotating component mounting plate, and slides with the C-shaped guide groove; the radial positioning groove is matched with a radial positioning slider, and the radial positioning slider and the radial positioning slot slide slide with each other, and the radial positioning slot is installed on the inner side of the rotating component mounting plate by a fastener, and one end of the radial positioning slider passes through the rotating component mounting plate and is located on the outer side of the rotating component mounting plate, and an elastic member is provided between the radial positioning slider and the radial positioning slot.

[0020] In order to facilitate the connection between the chin guard and the chin guard rotating component, and to be able to connect the chin guard rotating component and the driving block together, and to minimize the structural size of the chin guard mounting component and reduce the weight of the chin guard mounting component, a further preferred technical solution is that the chin guard is provided with a splicing tooth adapted to the splicing groove on the side facing the driving gear, and the chin guard is also provided with a mounting hole corresponding to the connecting hole, and fasteners are installed in the connecting hole and the mounting hole.

[0021] Compared with the prior art, the beneficial effects of the present invention are: the connection structure of the rotating chin guard on the helmet has the characteristics of simple structure, small number of parts, simple processing and manufacturing, easy use, long service life, and light overall weight of the helmet.

[0022] Compared to helmets with the same or similar effects disclosed in the aforementioned background art, the connection structure for the rotating chin guard on this helmet significantly simplifies the various connecting components and drive wheel structures for rotating the chin guard and visor. The number of components is reduced to 1 / 3 to 1 / 5 of the number of components used to install and drive the chin guard and visor in existing similar helmets. The complexity of each component is also greatly simplified, significantly improving the performance of the helmet product. Due to the small number of components and the relatively simple structure of each component, the manufacturing cost of the helmet is reduced, the reliability of use is improved, the service life is extended, the assembly and disassembly of the helmet is more convenient, and the opening and closing of the chin guard and visor during use is more convenient, faster, and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic diagram of the three-dimensional structure of a helmet in the connection structure of the helmet of the present invention;

[0024] FIG2 is a schematic diagram of an exploded structure of a connection structure on one side of the connection structure of the helmet of the present invention;

[0025] FIG3 is a partial enlarged view of the connection structure of FIG2 of the present invention;

[0026] FIG4 is a schematic structural diagram of the outer side of the mounting plate of the rotating component in the initial state of the working principle of the connection structure of the helmet of the present invention;

[0027] FIG5 is a schematic structural diagram of the inner side of the mounting plate of the rotating component in the initial state of the working principle of the connection structure of the helmet of the present invention;

[0028] FIG6 is a schematic structural diagram of the outer side of the mounting plate of the rotating component in a state where the chin guard drives the face mask to be lifted up simultaneously in the working principle of the connection structure of the helmet of the present invention;

[0029] FIG7 is a schematic structural diagram of the inner side of the mounting plate of the rotating component in a state where the chin guard drives the face mask to be lifted up simultaneously in the working principle of the connection structure of the helmet of the present invention;

[0030] FIG8 is a schematic diagram showing the structure of the inner side of the mounting plate of the rotating component in the working principle of the connection structure of the helmet of the present invention, in which the chin guard drives the face shield to be lifted up simultaneously to the end of rotation;

[0031] FIG9 is a schematic diagram showing the structure of the inner side of the mounting plate of the rotating component in the working principle of the connection structure of the helmet of the present invention, in which the chin guard drives the face shield to be lifted up simultaneously to the end of rotation;

[0032] FIG10 is a schematic structural diagram of the outer side of the mounting plate of the rotating component in the state where the chin guard continues to rotate backward after the upward rotation of the face mask is terminated in the working principle of the connection structure of the helmet of the present invention;

[0033] FIG11 is a schematic diagram illustrating the structure of the inner side of the mounting plate of the rotating component in the state where the chin guard continues to rotate backward after the upward rotation of the face mask is terminated in the working principle of the connection structure of the helmet of the present invention;

[0034] FIG12 is a schematic diagram showing the structure of the outer side of the mounting plate of the rotating component in the working principle of the connection structure of the helmet of the present invention, in which the chin guard rotates backward to the end point after the face mask stops rotating upward;

[0035] FIG13 is a schematic diagram illustrating the structure of the inner side of the mounting plate of the rotating component in the working principle of the connection structure of the helmet of the present invention, in a state where the chin guard also rotates backward to the end point after the face mask stops rotating upward;

[0036] FIG14 is a schematic structural diagram of the inner side of the mounting plate of the rotating component in the working principle of the connection structure of the helmet of the present invention, in a state where the chin guard rotates backward to the end point and then the mask rotates downward to the end point and then begins to rotate upward;

[0037] FIG15 is a schematic diagram illustrating the structure of the inner side of the mounting plate of the rotating component when the chin guard begins to rotate forward and the face mask rotates upward in the working principle of the connection structure of the helmet of the present invention;

[0038] FIG16 is a schematic diagram illustrating the structure of the inner side of the mounting plate of the rotating component during the working principle of the connection structure of the helmet according to the present invention, when the chin guard begins to rotate forward and when the face shield reaches the end of its upward rotation;

[0039] FIG17 is a schematic diagram illustrating the structure of the inner side of the mounting plate of the rotating component when the chin guard begins to rotate forward to the end point and the face mask rotates upward to the end point in the working principle of the connection structure of the helmet of the present invention;

[0040] FIG18 is a schematic diagram of the inner structure of the chin guard of FIG1 in the connection structure of the helmet of the present invention.

[0041] Figure: 1. Helmet body; 2. Face shield; 3. Chin guard; 4. Mounting slot; 5. Face shield rotation limiter; 6. Rotating component mounting plate; 7. Face shield mounting member; 8. Linkage guide ring member; 9. First rotating shaft; 10. Annular groove; 11. Drive block; 12. Second rotating shaft; 12.1 Fastener; 13. Fastener; 14. Strip slider; 15. Elastic member; 16. Strip rod; 17. Arc groove; 18. Columnar protrusion; 19. First mounting hole; 20. Second mounting hole; 21. Through hole; 22. Protruding tooth; 23. C-shaped guide groove; 24. Through hole; 25. Mounting hole; 26. Fastener; 27. Driving gear; 28. Driven gear; 29. ​​Fixed shaft; 30. Stepped hole; 31. End cap; 32. Radial groove; 33. Boss; 34. Bump; 35. Mounting hole; 36. Plug-in groove; 37. Connecting hole; 38. Groove; 39. Bump; 40. Radial positioning groove; 41. Radial positioning slider; 42. Radial positioning slide; 43. Elastic member; 44. Plug-in tooth; 45. Mounting hole. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] As shown in Figures 1 to 18, the present invention is a connection structure for rotating a chin guard on a helmet, the helmet comprising a helmet body 1, a mask 2 and a chin guard 3 symmetrically hinged on both sides of the helmet body 1 through a mask rotating part and a chin guard rotating part respectively, mounting grooves 4 are symmetrically provided on both sides of the helmet body 1, a mask rotation limiter 5 and a rotating part mounting plate 6 are installed in the mounting groove 4, a mask mounting part 7 in the mask rotating part is installed on the inner side of the rotating part mounting plate 6, the mask 2 is connected to a linkage guide ring part 8 of the chin guard 3 through the mask mounting part 7, the linkage guide ring part 8 is hinged to the rotating part mounting plate 6 through a first rotating shaft 9, a driving block 11 that cooperates with the inner side of the annular groove 10 is provided in the annular groove 10 on the linkage guide ring part 8, the driving block 11 passes through the rotating part mounting plate 6 through a second rotating shaft 12 and is connected to the chin guard rotating part arranged on the outside of the rotating part mounting plate 6, the chin guard rotating part is respectively connected to the rotating part mounting plate 6 and the chin guard 3.

[0044] In order to facilitate hiding the mask rotating parts and the chin guard rotating parts inside the helmet body so that they are not damaged and at the same time achieve an aesthetically pleasing appearance, a preferred embodiment of the present invention is that the mounting grooves 4 are symmetrically arranged on both sides of the helmet body 1, and are respectively arranged as inwardly recessed grooves, and the grooves have a two-layer stepped groove structure. The two layers of grooves are respectively the mask rotation limiter 5 mounting groove 4 located on the second layer and the rotating part mounting plate 6 mounting groove located on the first layer. The shape of the mask rotation limiter 5 mounting groove 4 is adapted to the shape of the mask rotation limiter 5, and the shape of the rotating part mounting plate 6 mounting groove is adapted to the shape of the rotating part mounting plate 6.

[0045] In order to effectively limit the rotation range of the mask and at the same time ensure that the mask will not automatically slide down after being rotated to a predetermined position, or the mask will swing up and down due to the vibration and bumps of the helmet body when the helmet is worn, a preferred embodiment of the present invention is that the mask rotation limiter 5 includes a strip slider 14 and a strip rod 16. The two ends of the strip rod 16 are connected to the mounting groove 4 by fasteners 13, and one side of the strip rod 16 is connected to the strip slider 14 by two elastic members (springs) 15. One side of the strip slider 14 is provided with an arc groove 17 for positioning the mask 2, and a plurality of arc grooves with different curvature radii are provided on the arc groove 17 to form a toothed arc limiting guide groove. The strip rod 16 and the strip slider 14 are respectively shell structures, and the concave cavity side of the strip rod 16 and the strip slider 14 faces the mounting groove 4.

[0046] In order to facilitate the connection between the mask and the linkage guide ring 8 and to simplify the installation operation, a preferred embodiment of the present invention is that the linkage guide ring 8 is a C-shaped open ring structure, one end of the linkage guide ring 8 of the C-shaped open ring structure is connected to the mask mounting member 7, and a columnar protrusion 18 is provided on one side facing the mounting groove 4 near the connection portion (as shown in Figure 18), and the columnar protrusion 18 cooperates with the arc-shaped groove 17 to constitute a limit for the mask; a first mounting hole 19 of the first rotating shaft 9 is provided near the other end of the C-shaped open ring linkage guide ring 8, and a second mounting hole 20 of the first rotating shaft 9 is provided on the rotating component mounting plate 6, and the first rotating shaft 9 installs the linkage guide ring 8 and the mask mounting member 7 on the rotating component mounting plate 6 through the first mounting hole 19, the second mounting hole 20 and the fastener, and makes the linkage guide ring 8 and the mask mounting member 7 rotate around the first rotating shaft 9 on the rotating component mounting plate 6.

[0047] In order to minimize the structural size of the linkage guide ring 8, reduce the weight of the linkage guide ring 8, facilitate the connection between the linkage guide ring 8 and the rotating component mounting plate 6, and facilitate the rotation of the mask around the second rotating shaft 12, and be able to stay in a predetermined position without slipping, a preferred embodiment of the present invention is that the mask mounting part 7 is a strip-shaped arc surface structure, the outer arc surface side of the strip-shaped arc surface is used to connect with the mask 2, and the inner arc surface side of the strip-shaped arc surface is used to connect with the linkage guide ring 8, or the mask mounting part 7 and the linkage guide ring 8 constitute an integral structure, the strip-shaped arc surface is provided with a slot and / or a convex edge on the outer arc surface side for connecting with the mask 2, and the width of the strip-shaped arc surface is greater than the width of the linkage guide ring 8.

[0048] In order to facilitate the driving block 11 to be driven by the chin guard 3 and the chin guard rotating component, the driving linkage guide ring 8 is driven to rotate around the second rotating shaft 12 and the mask is driven to rotate together, a preferred embodiment of the present invention is that the driving block 11 is a triangular sheet body, and a through hole 21 is provided in the center of the triangular sheet body, and a convex tooth 22 is provided on the periphery of the through hole 21 on the side of the triangular sheet body facing the rotating component mounting plate 6.

[0049] In order to facilitate the guidance and limitation of the movement trajectory of the driving block 11, to facilitate the installation of the chin guard rotating component on the rotating component mounting plate 6, and at the same time to minimize the structural size and weight of the rotating component mounting plate 6, a further preferred embodiment of the present invention is that the rotating component mounting plate 6 is a D-shaped shell structure, and the D-shaped shell structure is provided with a flange on the side facing the mounting groove 4, wherein the flange on the vertical straight side of the D-shaped shell structure is a stepped flange, and a C-shaped guide groove 23 is provided on the rotating component mounting plate 6 of the D-shaped shell structure, and a through hole 24 for the second rotating shaft 12 to pass through is provided on the D-shaped shell surrounded by the C-shaped guide groove, and a mounting hole 25 is also provided on the rotating component mounting plate 6 of the D-shaped shell structure, and the mounting hole 25 fixes the rotating component mounting plate 6 to the mounting groove 4 through a fastener 26.

[0050] In order to facilitate the guidance and limitation of the motion trajectory of the driving block 11, it is convenient to install the chin guard rotating component on the rotating component mounting plate 6, and at the same time to minimize the structural size and weight of the rotating component mounting plate 6, the present invention further preferably comprises a scheme in which the chin guard rotating component includes a driving gear 27, the driving gear 27 is engaged with the driven gear 28, and the driven gear 28 is fixedly mounted near one end of the C-shaped guide groove 23 by a fixed shaft 29, and the center of the driving gear 27 is provided with a stepped hole 30 that cooperates with the second rotating shaft 12, the second rotating shaft 12 is a hollow shaft, and one end of the second rotating shaft 12 is provided with a stepped hole 30 that cooperates with the second rotating shaft 12 0, a radial groove 32 is provided at the other end of the second rotating shaft 12, and the other end of the second rotating shaft 12 passes through the stepped hole 30, the through hole 21 on the driving block 11, and cooperates with a protrusion 34 on a boss 33 set in the mounting groove 4. The hollow shaft of the second rotating shaft 12 is connected to the mounting hole 35 on the boss 33 via a fastener 12.1; the driving gear 27 is provided with an insertion groove 36 and a connecting hole 37 for the chin guard 3 on the annular surface between the driving tooth and the stepped hole 30, and a groove 38 is provided on the annular surface on the other side between the driving tooth and the stepped hole 30, which engages with the protruding tooth 22 on the driving block 11.

[0051] In order to facilitate guiding and limiting the motion trajectory of the driving block 11, and to facilitate installing the chin guard rotating component on the rotating component mounting plate 6, and at the same time to minimize the structural size and weight of the rotating component mounting plate 6, a further preferred embodiment of the present invention is that the driving gear 27 is an incomplete gear, and the incomplete gear is provided with a protrusion 39 on the annular surface without teeth, and the protrusion 39 is provided with a radial positioning groove 40, and the protrusion 39 protrudes from the side of the driving gear 27 toward the rotating component mounting plate 6, and slides with the C-shaped guide groove 23; the radial positioning groove 40 cooperates with a radial positioning slider 41, and the radial positioning slider 41 and the radial positioning slide groove 42 slide with each other, and the radial positioning slide groove 42 is installed on the inner side of the rotating component mounting plate 6 by a fastener, and one end of the radial positioning slider 41 passes through the rotating component mounting plate 6 and is located on the outer side of the rotating component mounting plate 6, and an elastic member 43 is provided between the radial positioning slider 41 and the radial positioning slide groove 42.

[0052] In order to facilitate the connection between the chin guard 3 and the chin guard rotating component, and to be able to connect the chin guard rotating component and the driving block 11 together, and to minimize the structural size of the chin guard mounting component and reduce the weight of the chin guard mounting component, a further preferred embodiment of the present invention is that the chin guard 3 is provided with a splicing tooth 44 that is compatible with the splicing groove 36 on the side facing the driving gear 27, and the chin guard 3 is also provided with a mounting hole 45 corresponding to the connecting hole 37, and fasteners are installed in the connecting hole 37 and the mounting hole 45.

[0053] The working principle of the connection structure of the rotating chin guard on this helmet is as follows:

[0054] As shown in Figures 1 to 18, the helmet body 1 is injection molded by injection molding, and mounting grooves 4 are injection molded on both sides of the helmet body 1. The second layer of the mounting groove 4 is used to install the mask rotation limiter 5, and the first layer of the mounting groove 4 is used to install the rotating component mounting plate 6. A linkage guide ring 8 is hingedly installed on the side of the rotating component mounting plate 6 facing the mounting groove 4. The linkage guide ring 8 is a C-shaped ring structure. One end of the C-shaped ring structure linkage guide ring 8 is connected to the rotating component mounting plate 6 through a first rotating shaft 9, and the other end of the C-shaped ring structure linkage guide ring 8 is connected to the mask mounting part 7. The mask mounting part 7 is an arc-shaped strip structure, and the mask 2 is installed on the outer arc surface of the arc-shaped strip structure mask mounting part 7. Near the other end of the C-shaped annular structure linkage guide ring 8, a cylindrical projection 18 is provided on the side facing the mounting groove 4. This cylindrical projection 18 slidably engages with an arcuate groove 17 on the strip slider 14 of the mask rotation limiter 5 within the mounting groove 4. The arcuate groove 17 on the strip slider 14 is provided with multiple arcuate grooves of varying curvature radii, forming a toothed arcuate limit guide groove. This serves to position the mask 2, allowing it to remain in different positions without slipping. The strip slider 14 slidably engages with a strip rod 16 in the mask rotation limiter 5 via an elastic member (spring) 15. The strip rod 16 is secured to the mounting groove 4 via fastener screws. When the mask 2 is pushed to slide up and down, the mask 2 rotates on the rotating component mounting plate 6 around the first rotating shaft 9 through the mask mounting member 7 and the linkage guide ring member 8. Near the other end of the C-shaped ring structure linkage guide ring member 8, the columnar protrusion 18 on one side of the mounting groove 4 will slide in the arc groove 17 on the strip slider 14. Under the action of the elastic member (spring) 15, the strip slider 14 always maintains a pressed contact with the columnar protrusion 18. A guide groove and a guide strip are also provided between the strip slider 14 and the strip rod 16.

[0055] A driving block 11 is also provided inside the ring of the C-shaped annular structure linkage guide ring 8. The driving block 11 has a triangular structure and can be used to drive the C-shaped annular structure linkage guide ring 8. Initially, the chin guard 3 and the mask 2 are both at the lowest end. When the chin guard 3 needs to be lifted upward, the right top corner of the triangular structure driving block 11, driven by the second rotating shaft 12, contacts the inner ring of the C-shaped annular straight edge section of the C-shaped annular structure linkage guide ring 8 close to the first rotating shaft 9. The right top corner of the triangular structure driving block 11 presses the C-shape to rotate clockwise around the first rotating shaft 9, which will push the mask 2 to lift up together. When the mask 2 is lifted up to the end point, the right top corner of the triangular structure driving block 11 has rotated to the arc section of the C-shaped ring. At this time, the mask 2 can be rotated downward or upward alone, and the chin guard 3 can continue to flip upward or backward. When the chin guard 3 flips backward to the end point, the triangular structure driving block 11 is rotated to the arc section of the C-shaped ring. The right top corner of the structural driving block 11 has been rotated to the left side of the arc segment of the C-shaped ring, and the left top corner of the triangular structural driving block 11 has been rotated to the right side of the arc segment of the C-shaped ring. If the chin guard 3 needs to be flipped upward and forward, at this time, if the mask 2 is located at the lower end of the helmet body 1, the triangular structural driving block 11 rotates counterclockwise under the drive of the second rotating shaft 12, and the left top corner of the triangular structural driving block 11 will contact and press with the inner ring of the C-shaped straight edge segment of the linkage guide ring 8, so that the mask 2 is lifted upward to the end point, or the mask 2 is lifted upward to the upward end position in advance, and then the left top corner of the triangular structural driving block 11 rotates back to the left side of the original position in the opening section of the C-shaped ring. At this time, the mask 2 can be rotated downward to the initial position again.

[0056] The triangular structure driving block 11 is a hollow shaft mechanism. The hollow shaft is provided with a convex tooth 22 at the port portion facing the rotating component mounting plate 6. The rotating component mounting plate 6 is a D-shaped shell structure. The D-shaped shell structure is provided with a flange on the side facing the mounting groove 4, wherein the flange on the vertical straight side of the D-shaped shell structure is a stepped flange. A C-shaped guide groove 23 is provided on the rotating component mounting plate 6 of the D-shaped shell structure, and a through hole 24 for the second rotating shaft 12 to pass through is provided on the D-shaped shell surrounded by the C-shaped guide groove. A mounting hole 25 is also provided on the rotating component mounting plate 6 of the D-shaped shell structure. The mounting hole 25 fixes the rotating component mounting plate 6 to the mounting groove 4 through a fastener (screw) 26. The chin guard rotating part includes a driving gear 27, which is engaged with a driven gear 28. The driven gear 28 is fixedly installed near one end of the C-shaped guide groove 23 through a fixed shaft 29. The center of the driving gear 27 is provided with a stepped hole 30 that cooperates with the second rotating shaft 12. The second rotating shaft 12 is a hollow shaft. One end of the second rotating shaft 12 is provided with an end cap 31 that cooperates with the stepped hole 30. The other end of the second rotating shaft 12 is provided with a radial groove 32. The other end of the second rotating shaft 12 passes through the stepped hole 30. The through hole 21 on the driving block 11 cooperates with a protrusion 34 on a boss 33 provided in the mounting groove 4, and the hollow shaft of the second rotating shaft 12 is connected to the mounting hole 35 on the boss 33 via a fastener (screw) 12.1; the driving gear 27 is provided with a plug-in groove 36 and a connecting hole 37 for the chin guard 3 on the annular surface between the driving tooth and the stepped hole 30, and the driving gear 27 is provided with a groove 38 on the other side of the annular surface between the driving tooth and the stepped hole 30, which engages with the protruding tooth 22 on the driving block 11. The drive gear 27 is an incomplete gear. A protrusion 39 is provided on its toothless annular surface. This protrusion 39 is provided with a radial positioning groove 40. The protrusion 39 protrudes from the side of the drive gear 27 on the side facing the rotating component mounting plate 6 and slidably engages with the C-shaped guide groove 23. The radial positioning groove 40 engages with a radial positioning slider 41, which slidably engages with a radial positioning groove 42. The radial positioning groove 42 is mounted on the inner side of the rotating component mounting plate 6 via fasteners. One end of the radial positioning slider 41 passes through the rotating component mounting plate 6 and is located on the outer side of the rotating component mounting plate 6. An elastic member (spring) 43 is provided between the radial positioning slider 41 and the radial positioning groove 42. The chin guard 3 has a splice tooth 44 on the side facing the drive gear 27 that mates with the splice groove 36. The chin guard 3 also has a mounting hole 45 corresponding to the connecting hole 37. Fasteners are installed in both the connecting hole 37 and the mounting hole 45.

[0057] When the chin guard 3 is rotated, the internally mounted splice teeth 44 and fasteners (screws) connect to the splice slots 36 and connection holes 37 on the opposite side of the drive gear 27, pushing the drive gear 27 to rotate. Meanwhile, the grooves 38 on the other side of the drive gear 27 engage with the protruding teeth 22 on the drive block 11, causing the drive block 11 to rotate. Because the drive gear 27 is an incomplete gear, it cannot rotate a full revolution, thus preventing the chin guard 3 from rotating a full revolution. Furthermore, a protrusion 39 is provided at one end of the incomplete gear teeth, which also includes a radial positioning groove 40. Once the radial positioning groove 40 reaches a set position, it is locked by a radial positioning slider 41, preventing further rotation. The radial positioning slider 41 slidably engages with a radial positioning groove 42 mounted on the inner side of the rotating component mounting plate 6 via an elastic member (spring) 43. Second rotating shaft 12 is hollow and is connected via fasteners (screws) 12.1 through hollow second rotating shaft 12, triangular drive block 11, and mounting holes provided in the bosses on mounting slot 4. When drive gear 27 rotates, one side of a boss 39 on one end of the incomplete gear teeth slides into a C-shaped guide slot 23 provided on rotating component mounting plate 6.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A connection structure for a helmet, comprising a helmet body (1), a face mask (2) and a chin guard (3) being symmetrically hinged on both sides of the helmet body (1) through a face mask rotating part and a chin guard rotating part, and mounting grooves (4) being symmetrically arranged on both sides of the helmet body (1), characterized in that: A mask rotation limiter (5) and a rotating component mounting plate (6) are mounted in the mounting groove (4); a mask mounting member (7) in the mask rotating component is mounted on the inner side of the rotating component mounting plate (6); the mask (2) is connected to a linkage guide ring member (8) of the chin guard (3) via the mask mounting member (7); the linkage guide ring member (8) is hinged to the rotating component mounting plate (6) via a first rotating shaft (9); a driving block (11) matched with the inner side of the annular groove (10) is arranged in the annular groove (10) on the linkage guide ring member (8); the driving block (11) passes through the rotating component mounting plate (6) via a second rotating shaft (12) and is connected to a chin guard rotating component arranged on the outer side of the rotating component mounting plate (6); and the chin guard rotating component is respectively connected to the rotating component mounting plate (6) and the chin guard (3).

2. The connection structure of the helmet as claimed in claim 1, characterized in that: The mounting grooves (4) are symmetrically arranged on both sides of the helmet body (1) and are respectively arranged as inwardly recessed grooves, the grooves presenting a two-layer stepped groove structure, the two layers of grooves respectively being a mask rotation limiter (5) mounting groove (4) located on the second layer and a rotating component mounting plate (6) mounting groove located on the first layer, the shape of the mask rotation limiter (5) mounting groove (4) being adapted to the shape of the mask rotation limiter (5), and the shape of the rotating component mounting plate (6) mounting groove being adapted to the shape of the rotating component mounting plate (6).

3. The connection structure of the helmet as claimed in claim 1, characterized in that: The mask rotation limiting member (5) comprises a strip-shaped slider (14) and a strip-shaped rod (16). The two ends of the strip-shaped rod (16) are connected to the mounting groove (4) via fasteners (13). One side of the strip-shaped rod (16) is connected to the strip-shaped slider (14) via an elastic member (15). One side of the strip-shaped slider (14) is provided with an arc-shaped groove (17) for positioning the mask (2). The arc-shaped groove (17) is provided with a plurality of arc-shaped grooves with different curvature radii to form a toothed arc-shaped limiting guide groove. The strip-shaped rod (16) and the strip-shaped slider (14) are respectively shell structures. The concave cavity side of the strip-shaped rod (16) and the strip-shaped slider (14) faces the mounting groove (4).

4. The connection structure of the helmet as claimed in claim 3, characterized in that: The linkage guide ring member (8) is a C-shaped open ring structure. One end of the linkage guide ring member (8) of the C-shaped open ring structure is connected to the mask mounting member (7), and a columnar protrusion (18) facing the mounting groove (4) is provided near the connection portion. The columnar protrusion (18) cooperates with the arc-shaped groove (17) to form a limit for the mask. A first mounting hole (19) of the first rotating shaft (9) is provided near the other end of the C-shaped open ring linkage guide ring member (8). A second mounting hole (20) of the first rotating shaft (9) is provided on the rotating component mounting plate (6). The first rotating shaft (9) mounts the linkage guide ring member (8) and the mask mounting member (7) on the rotating component mounting plate (6) through the first mounting hole (19), the second mounting hole (20) and the fastener, so that the linkage guide ring member (8) and the mask mounting member (7) rotate around the first rotating shaft (9) on the rotating component mounting plate (6).

5. The connection structure of the helmet as claimed in claim 1, characterized in that: The mask mounting member (7) is in the form of a strip-shaped arc surface structure, wherein the outer arc surface of the strip-shaped arc surface is used to connect with the mask (2), and the inner arc surface of the strip-shaped arc surface is used to connect with the linkage guide ring member (8), or the mask mounting member (7) and the linkage guide ring member (8) form an integral structure, and the strip-shaped arc surface is provided with a slot and / or a convex edge on the outer arc surface side for connecting with the mask (2), and the width of the strip-shaped arc surface is greater than the width of the linkage guide ring member (8).

6. The connection structure of the helmet as claimed in claim 1, characterized in that: The driving block (11) is in the form of a triangular sheet, a through hole (21) is provided at the center of the triangular sheet, and convex teeth (22) are provided around the through hole (21) on the side of the triangular sheet facing the rotating component mounting plate (6).

7. The connection structure of the helmet as claimed in claim 1, characterized in that: The rotating component mounting plate (6) is in the form of a D-shaped shell structure, wherein a flange is provided on one side of the D-shaped shell structure facing the mounting groove (4), wherein the flange on the vertical straight side of the D-shaped shell structure is a stepped flange, a C-shaped guide groove (23) is provided on the rotating component mounting plate (6) of the D-shaped shell structure, a through hole (24) for the second rotating shaft (12) to pass through is provided on the D-shaped shell surrounded by the C-shaped guide groove, and a mounting hole (25) is also provided on the rotating component mounting plate (6) of the D-shaped shell structure, wherein the mounting hole (25) is used to fix the rotating component mounting plate (6) on the mounting groove (4) via a fastener (26).

8. The connection structure of the helmet as claimed in claim 6, characterized in that: The chin guard rotating component comprises a driving gear (27), the driving gear (27) meshing with a driven gear (28), the driven gear (28) being fixedly mounted near one end of the C-shaped guide groove (23) through a fixed shaft (29), a stepped hole (30) matching with the second rotating shaft (12) being provided at the center of the driving gear (27), the second rotating shaft (12) being a hollow shaft, an end cap (31) matching with the stepped hole (30) being provided at one end of the second rotating shaft (12), a radial groove (32) being provided at the other end of the second rotating shaft (12), and the other end of the second rotating shaft (12) passing through the stepped hole (31). The hole (30), the through hole (21) on the driving block (11) cooperate with a protrusion (34) on a protrusion (33) arranged in the installation groove (4), and the hollow shaft of the second rotating shaft (12) is connected with the installation hole (35) on the protrusion (33) through a fastener; the driving gear (27) is provided with a chin guard plug groove (36) and a connecting hole (37) on the annular surface between the driving tooth and the stepped hole (30), and the driving gear (27) is provided with a groove (38) on the other side annular surface between the driving tooth and the stepped hole (30) to engage with the protruding tooth (22) on the driving block (11).

9. The connection structure of the helmet as claimed in claim 8, characterized in that: The driving gear (27) is an incomplete gear. A protrusion (39) is provided on a ring surface without teeth of the incomplete gear. A radial positioning groove (40) is provided on the protrusion (39). The protrusion (39) protrudes from the side of the driving gear (27) toward the rotating component mounting plate (6) and is slidably matched with the C-shaped guide groove (23). The radial positioning groove (40) is matched with a radial positioning slider (41). The radial positioning slider (41) and the radial positioning slide groove (42) are slidably matched with each other. The radial positioning slide groove (42) is installed on the inner side of the rotating component mounting plate (6) through a fastener. One end of the radial positioning slider (41) passes through the rotating component mounting plate (6) and is located on the outer side of the rotating component mounting plate (6). An elastic member (43) is provided between the radial positioning slider (41) and the radial positioning slide groove (42).

10. The connection structure of the helmet as claimed in claim 8, characterized in that: The chin guard (3) is provided with a plug-in tooth (44) matched with the plug-in groove (36) on one side facing the driving gear (27), and the chin guard (3) is also provided with a mounting hole (45) corresponding to the connecting hole (37), and fasteners are installed in the connecting hole (37) and the mounting hole (45).

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