Connecting structure of helmet

Abstract

The invention discloses a helmet connecting structure which comprises a helmet body, a mask and a jaw shield are symmetrically hinged to the two sides of the helmet body through a mask rotating component and a jaw shield rotating component respectively, and mounting grooves are symmetrically formed in the two sides of the helmet body. A mask rotating limiting piece and a rotating part mounting plate are mounted in the mounting groove, a mask mounting piece in a mask rotating part is mounted on the inner side of the rotating part mounting plate, the mask is connected with a linkage guiding annular piece of the jaw protection cover through the mask mounting piece, and the linkage guiding annular piece is hinged to the rotating part mounting plate through a first rotating shaft. A driving block matched with the inner side of an annular groove is arranged in the annular groove in the linkage guiding annular piece, the driving block penetrates through the rotating part mounting plate through a second rotating shaft to be connected with a jaw protection cover rotating part arranged on the outer side of the rotating part mounting plate, and the jaw protection cover rotating part is connected with the rotating part mounting plate and a jaw protection cover.

Description

Technical Field

[0001] The present invention relates to the technical field of human body safety protection equipment, and more particularly to a helmet for protecting the human head, and more particularly to a helmet with a jaw protection structure, and more particularly to a chin guard, which can be rotated from the chin portion 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 driving the machines; in addition, in many special operations, such as spraying workshops, firefighting and disaster relief, anti-terrorism and riot control, as well as personnel working in harsh environments such as mining, coal mining, and excavation, 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 jaw guard that embraces the user's chin, while the half-face structural helmet does not have such a jaw guard. As for the full-face structural helmet, because it has a jaw 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 jaw guard, it shows better user comfort.

[0003] The jaw guard and the main body of the helmet shell of the traditional full-face helmet are manufactured in an integrated structure, that is, the jaw guard is a relatively fixed structural layout relative to the main body of the helmet shell. Undoubtedly, this integrated structure of the traditional full-face helmet is sturdy and reliable, and therefore it has sufficient safety protection for the wearer. However, from another perspective, the integrated full-face helmet also has defects: first, from the perspective of use, when the wearer needs to do activities such as drinking water, talking on the phone, resting, etc., he must first take off the helmet to complete the corresponding actions. Undoubtedly, this performance of the traditional integrated full-face helmet appears to be relatively dull and inconvenient; secondly, from the perspective of production, the integrated full-face helmet also has a structural feature of a large inner cavity with a small notch, which makes its mold very complicated, so the production efficiency is not high, which is the reason why the manufacturing cost of the integrated full-face helmet is high.

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

[0005] Chinese patent application CN105901820A proposes "a helmet with a variable jaw guard structure based on gear constraints". The biggest feature of this invention is that: a cylindrical gear-type fixed internal gear is arranged on both sides of the helmet shell, and two cylindrical gear-type rotating external gears are fastened and arranged on the two fork handles of the jaw guard in response, and a corresponding arc-shaped constraint groove is provided on the base fastened to the helmet shell. The rotating external gear and the fixed internal gear are restricted by the constraint groove to keep them meshing and forming a kinematic pair, so as to implement the constraints required by the predetermined process on the position and posture of the jaw guard, and finally realize that the jaw guard runs according to the planned trajectory between the full helmet structure position and the half helmet structure position and can be converted in reverse. In other words, the jaw guard can be opened from the full helmet structure position to the half helmet structure position as needed, and vice versa. At the same time, since the jaw guard and the helmet shell body are no longer an integrated structure, the mold for making the helmet is also simpler, so the manufacturing cost can be reduced and the production efficiency can be improved. Obviously, the gear-constrained variable chin guard structure solution provided by the above patent application can better deal with the multi-objective requirements of safety, convenience and low cost, thereby promoting the advancement of helmet technology.

[0006] However, although the variable jaw shield structure helmet proposed in Chinese patent application CN105901820A has self-evident advantages, it needs to adopt a long arc-shaped constraint groove with a through-characteristic to maintain the meshing relationship between its rotating external gear and the fixed internal gear, and its rotating external gear swings with the jaw shield at a large angle, which also brings some disadvantages, specifically: 1) The long and arc-shaped constraint groove makes the reliability of the helmet have hidden dangers, because when the jaw shield is in the process of changing its position, especially when the jaw shield is in a certain intermediate position between the full helmet structure and the half helmet structure When the helmet is in a so-called flip-up state (the helmet at this time is a "quasi-half-helmet structure helmet", which is conducive to the wearer's drinking, conversation and temporary ventilation and is particularly suitable for tunnel operations), the jaw guard cannot completely cover the constraint groove, that is, the jaw guard handle is difficult to effectively cover the through-shaped long arc-shaped constraint groove, resulting in an opportunity for foreign matter to enter the meshing motion pair formed by 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 certain risks in the reliability of the helmet during use; 2 ) The existence of the long arc-shaped constraint groove also makes the helmet noisy. This is also because the jaw guard needs to be in a certain intermediate position between the full helmet structure and the half helmet structure during the process of changing its position to form a so-called flip-up helmet. For the rider, the jaw guard cannot completely cover the constraint groove, 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 groove. Note that these constraint grooves are arranged just near the two ears of the wearer, 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 space area it sweeps is relatively large. Obviously, fastening screws or other fastening structures cannot be arranged in the space area where the external gear rotates. 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 this structural form of component is relatively small, which means that the stiffness of the helmet shell is weak. 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, which includes a helmet shell body, a jaw guard and a fork handle on the jaw guard, and adopts a bottom support, a fork handle, an internal gear, an external gear, and a transmission member to form a related mechanism, wherein the internal gear and the external gear both rotate on a fixed axis and form a meshing constraint pair, the internal gear and the fork handle slide with each other and form a sliding constraint pair, and the transmission member transmits the movement of the external gear to the fork handle and causes the jaw guard to produce a telescopic displacement relative to the helmet shell body, thereby achieving the jaw guard to flip and also compound a reciprocating movement, thereby realizing the position conversion of the jaw guard between the full helmet position and the half helmet position. Because the fork handle can cover the through groove on the internal gear during the jaw guard flipping process, it prevents external foreign matter from entering the gear pair to ensure the reliability of the helmet, and can block external noise from invading the helmet to improve the comfort of the helmet. The fixed-axis rotating gear occupies less space and also creates conditions for improving the rigidity of related components, so it also improves the safety of the helmet. However, the structure of the helmet is very complicated, which is not easy to manufacture and use. In addition, it is heavy, has high manufacturing cost, short service life and is easy to damage.

[0008] Chinese patent CN111264968A also discloses a chin guard positioning assembly and a helmet having the same, wherein the helmet main body covering the user's head and the chin guard are connected to each other, and the chin guard moves from the protection position to the open position or from the open position to the protection position, and the chin guard positioning assembly includes: a moving base portion, connected to the chin guard, and can move position together with the chin guard; a fixed base portion, connected to the helmet main body and the moving base portion, and serving as a reference for the moving base portion to move position; a fixed magnetic portion, fixed to the fixed base portion; and a moving magnetic portion, which interacts with the magnetic properties of the fixed magnetic portion and is fixed to the moving base portion, so that the moving base portion is fixed in the first position or the second position. The helmet also has the problems of complex structure, inconvenient processing and manufacturing, inconvenient use, heavy weight, high manufacturing cost, short service life, and easy damage.

[0009] In summary, the existing helmets with variable jaw protection structures still have room for further improvement and enhancement. Summary of the invention

[0010] The purpose of the present invention is to overcome the defects in the prior art and provide a connection structure for a rotating chin guard on a helmet which has a simple structure, a small number of parts, simple processing and manufacturing, convenient use, a long service life and a 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 comprises a helmet body, a mask and a chin guard are symmetrically hinged on both sides of the helmet body through a mask rotating part and a chin guard rotating part respectively, mounting grooves are symmetrically arranged on both sides of the helmet 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 linkage guide ring part of the chin guard through the mask mounting part, 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 respectively connected to the rotating part mounting plate and the chin guard.

[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 recessed grooves, and the grooves have a two-layer stepped groove structure. The two layers of grooves are respectively a mask rotation limiter mounting groove located on the second layer, and a rotating component mounting plate mounting groove located on the first layer. The shape of the mask rotation limiter mounting groove is matched with the shape of the mask rotation limiter, and the shape of the rotating component mounting plate mounting groove is matched with the shape of the rotating component mounting plate.

[0013] In order to effectively limit the rotation range of the mask, while ensuring that the mask does not automatically slide down after being rotated to a predetermined position, or cause the mask to swing up and down due to 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, and the two ends of the strip rod are connected to the mounting groove by fasteners, 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-shaped groove to constitute 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 dimensions of the linkage guide ring member, reduce the weight of the linkage guide ring member, facilitate the connection between the linkage guide ring member and the rotating component mounting plate, and facilitate the mask to rotate around the second rotating axis and be able to stay in a predetermined position without slipping, a preferred technical solution is that the mask mounting member 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 member, or the mask mounting member and the linkage guide ring member 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, and the width of the strip-shaped arc surface is greater than the width of the linkage guide ring member.

[0016] In order to facilitate the driving block to be driven together by the chin guard and the chin guard rotating part, the driving linkage guide ring part rotates around the second rotating shaft and drives the mask 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 part mounting plate.

[0017] In order to facilitate guiding and limiting the movement 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 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 movement 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, the driving gear is meshed with a driven gear, and the driven gear is fixedly installed near one end of the C-shaped guide groove through a fixed shaft, and 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, and 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, the through hole on the driving block and cooperates with a protrusion on a boss set in the mounting groove, and 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 plug-in groove and a connecting hole of the chin guard 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 movement trajectory of the driving block, 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, 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 cooperates with a radial positioning slider, the radial positioning slider and the radial positioning slot slide slide with each other, the radial positioning slot is installed on the inner side of the rotating component mounting plate by a fastener, 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 part, and to be able to connect the chin guard rotating part and the driving block together, and to minimize the structural size of the chin guard mounting part and reduce the weight of the chin guard mounting part, a further preferred technical solution is that the chin guard is provided with a splicing tooth matched with 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 as follows: 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, convenient use, long service life, and light overall weight of the helmet.

[0022] Compared with the helmets disclosed in the above background technology with the same or similar use effects, the connection structure of the chin guard and the face mask is greatly simplified, and the number of parts is reduced to 1 / 3 to 1 / 5 of the number of parts used to install and drive the chin guard and the face mask on the existing similar helmets. At the same time, the complexity of each part is also greatly simplified, so that the helmet product has a greatly improved use performance. Due to the small number of parts and the simple structure of each part, the processing and manufacturing cost of the helmet will be lower, the reliability of use is improved, the service life is extended, the assembly and disassembly of the helmet is more convenient, and the opening / closing operation of the chin guard and the face mask during use is more convenient, faster, and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the helmet in the connection structure of the helmet of the present invention;

[0024] Figure 2 It is a schematic diagram of the exploded structure of a connecting structure on one side of the connecting structure of the helmet of the present invention;

[0025] Figure 3 For the present invention Figure 2 A partial enlarged view of the connection structure;

[0026] Figure 4 It is a structural schematic diagram of the outer side of the mounting plate of the rotating component in the initial state in the working principle of the connection structure of the helmet of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the inner side of the mounting plate of the rotating component in the initial state in the working principle of the connection structure of the helmet of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the outer side of the mounting plate of the rotating component in the state where the chin guard drives the face mask to be lifted up at the same time in the working principle of the connection structure of the helmet of the present invention;

[0029] Figure 7 It 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 at the same time in the working principle of the connection structure of the helmet of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the inner side of the mounting plate of the rotating component in which the chin guard drives the face shield to be lifted up to the end of rotation in the working principle of the connection structure of the helmet of the present invention;

[0031] Fig. 9It is a structural schematic diagram of the inner side of the mounting plate of the rotating component in which the chin guard drives the face shield to be lifted up to the end of rotation in the working principle of the connection structure of the helmet of the present invention;

[0032] Fig.10 It is a structural schematic 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 stops in the working principle of the connection structure of the helmet of the present invention;

[0033] Fig.11 It is a schematic structural diagram 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 stops in the working principle of the connection structure of the helmet of the present invention;

[0034] Fig.12 It is a schematic structural diagram 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 also rotates backward to the end point after the mask rotates upwards to the end point;

[0035] Fig.13 It 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 which the chin guard also rotates backward to the end point after the mask stops rotating upward;

[0036] Fig.14 It is a structural schematic 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 the mask rotates downward to the end point and then starts to rotate upward;

[0037] Fig.15 It is a schematic structural diagram of the inner side of the mounting plate of the rotating component when the chin guard starts 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] Fig.16 It is a schematic structural diagram of the inner side of the mounting plate of the rotating component when the chin guard starts to rotate forward and the face shield rotates upward to the end point in the working principle of the connection structure of the helmet of the present invention;

[0039] Fig.17 It is a schematic structural diagram of the inner side of the mounting plate of the rotating component when the chin guard starts 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] Fig.18 In the connection structure of the helmet of the present invention Figure 1 Schematic diagram of the inner structure of the chin guard.

[0041] In the figure: 1. Helmet body; 2. Face mask; 3. Chin guard; 4. Mounting slot; 5. Face mask rotation limiter; 6. Rotating component mounting plate; 7. Face mask mounting member; 8. Linkage guide annular member; 9. First rotating shaft; 10. Annular groove; 11. Driving 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. convex 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 described clearly and completely 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] like Figures 1 to 18 As shown, the present invention is a connection structure for rotating a chin guard on a helmet, the helmet comprises a helmet body 1, a mask 2 and a chin guard 3 are symmetrically hinged on both sides of the helmet body 1 through a mask rotating component and a chin guard rotating component respectively, mounting grooves 4 are symmetrically arranged on both sides of the helmet body 1, a mask rotation limiter 5 and a rotating component mounting plate 6 are installed in the mounting grooves 4, a mask mounting member 7 in the mask rotating component is installed 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 through the mask mounting member 7, the linkage guide ring member 8 is hinged to the rotating component mounting plate 6 through 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 through a second rotating shaft 12 and is connected 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 respectively connected to the rotating component mounting plate 6 and the chin guard 3.

[0044] 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, a preferred implementation scheme 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, and the two layers of grooves are respectively the mask rotation limiter 5 mounting groove 4 located on the second layer and the rotating component 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 component mounting plate 6 mounting groove is adapted to the shape of the rotating component 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 rotating 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 embodiment of the present invention is that the mask rotation limiter 5 includes a strip slider 14 and a strip rod 16. The strip rod 16 is connected to the mounting groove 4 by fasteners 13 near both ends, 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 of the mask and the linkage guide ring 8 together and 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 (such as a cylindrical protrusion 18) on one side facing the mounting groove 4 is provided near the connection portion. Fig.18 As shown), 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-shaped 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. The first rotating shaft 9 installs the linkage guide ring 8 and the mask mounting component 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 component 7 rotate around the first rotating shaft 9 on the rotating component mounting plate 6.

[0047] In order to minimize the structural dimensions 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 mask to rotate around the second rotating shaft 12, and be able to stay in a predetermined position without slipping, a preferred embodiment of the present invention also has that the mask mounting member 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 member 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 together through 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 drive the mask to rotate together, a preferred embodiment of the present invention is that the driving block 11 is a triangular sheet body, 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 guiding and limiting the movement trajectory of the driving block 11, 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 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 guiding and limiting 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 that the chin guard rotating component includes a driving gear 27, the driving gear 27 is meshed 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, 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, 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 arranged in the mounting groove 4, and the hollow shaft of the second rotating shaft 12 is connected with the mounting hole 35 on the boss 33 through a fastener 12.1; the driving gear 27 is provided with a plug-in groove 36 and a connecting hole 37 of the chin guard 3 on the annular surface between the driving tooth and the stepped hole 30, and a groove 38 that is engaged with the protruding tooth 22 on the driving block 11 is provided on the other side annular surface between the driving tooth and the stepped hole 30.

[0051] In order to facilitate guiding and limiting the movement trajectory of the driving block 11, 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, 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 by 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, 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 plug-in tooth 44 that is compatible with the plug-in 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 the helmet is as follows:

[0054] like Figures 1 to 18 As shown, 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 part 8 is hingedly installed on the side of the rotating component mounting plate 6 facing the mounting groove 4. The linkage guide ring part 8 is a C-shaped ring structure. One end of the C-shaped ring structure linkage guide ring part 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 part 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 columnar protrusion 18 is provided on the side facing the installation groove 4, and the columnar protrusion 18 slides with the arc groove 17 on the strip slider 14 in the mask rotation limiter 5 in the installation groove 4. The arc groove 17 on the strip slider 14 is provided with multiple arc grooves with different curvature radii to form a toothed arc limit guide groove, which is used for positioning the mask 2, that is, the mask can stay at different positions without slipping. The strip slider 14 slides with the strip rod 16 in the mask rotation limiter 5 through the elastic member (spring) 15, and the strip rod 16 is installed in the installation groove 4 through the fastener screw. 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 pressing 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. When the chin guard 3 and the mask 2 are initially located at the lowest end, when the chin guard 3 needs to be lifted upward, the right vertex corner of the driving block 11 with a triangular structure 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 under the drive of the second rotating shaft 12. The right vertex corner of the driving block 11 with a triangular structure presses the C-shape to rotate clockwise around the first rotating shaft 9, which pushes the mask 2 to be lifted upward together. When the mask 2 is lifted upward to the end point, the right vertex corner of the driving block 11 with a triangular structure 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 also continue to flip upward and backward. When the chin guard 3 flips backward to the end point, the triangular structure The right vertices of the structural drive block 11 have been rotated to the left side of the circular arc segment of the C-shaped ring, and the left vertices of the triangular structural drive block 11 have been rotated to the right side of the circular arc segment of the C-shaped ring. If the chin guard 3 needs to be flipped upward and forward, if the mask 2 is located at the lower end of the helmet body 1, the triangular structural drive block 11 rotates counterclockwise under the drive of the second rotating shaft 12, and the left vertices of the triangular structural drive 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 vertices of the triangular structural drive block 11 are rotated and reset 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, and a convex tooth 22 is provided at the port portion of the hollow shaft facing the rotating component mounting plate 6. 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 on the mounting groove 4 through a fastener (screw) 26. The chin guard rotating part includes a driving gear 27, which is meshed 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 matches 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 matches 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 arranged 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 through a fastener (screw) 12.1; the driving gear 27 is provided with a plug-in groove 36 and a connecting hole 37 of 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 is engaged with the protruding tooth 22 on the driving block 11. The driving gear 27 is an incomplete gear. A protrusion 39 is provided on the annular 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 facing 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. The radial positioning slider 41 and the radial positioning slide groove 42 slide 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 (spring) 43 is provided between the radial positioning slider 41 and the radial positioning slide groove 42. A plug-in tooth 44 matching the plug-in groove 36 is provided on the side of the chin guard 3 facing the driving gear 27. A mounting hole 45 corresponding to the connecting hole 37 is also provided on the chin guard 3. Fasteners are installed in the connecting hole 37 and the mounting hole 45.

[0057] When the chin guard 3 is pushed to rotate, the chin guard 3 is connected with the plug-in groove 36 and the connecting hole 37 on the opposite surface of the driving gear 27 through the plug-in teeth 44 and the fasteners (screws) arranged on the inner side, so as to push the driving gear 27 to rotate, and the groove 38 arranged on the other side of the driving gear 27 is engaged with the convex teeth 22 on the driving block 11 to rotate the driving block 11. Since the driving gear 27 is an incomplete gear, it cannot rotate one circle, and thus the chin guard 3 cannot rotate one circle. In addition, a protrusion 39 is arranged at one end of the incomplete gear tooth, and a radial positioning groove 40 is also arranged on the protrusion 39. After the radial positioning groove 40 rotates to the set position, it is stuck by a radial positioning slider 41 and cannot continue to rotate. The radial positioning slider 41 slides with the radial positioning slide groove 42 installed on the inner side of the rotating component mounting plate 6 through an elastic member (spring) 43. The second rotating shaft 12 is a hollow shaft, which is connected to the mounting hole of the boss provided on the mounting groove 4 through a fastener (screw) 12.1 passing through the hollow second rotating shaft 12, the triangular driving block 11. When the driving gear 27 rotates, one side of the protrusion 39 at one end of the incomplete gear tooth slides with the C-shaped guide groove 23 provided on the rotating component mounting plate 6.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope 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 according to 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 according to 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 according to 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 according to 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 according to 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 according to 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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