Rotation structure of helmet jaw shield

Abstract

The invention discloses a rotating structure of a jaw shield of a helmet, the rotating structure of the jaw shield comprises a driving gear, a driven gear, a rotating part mounting plate and a first rotating shaft, a C-shaped guide groove is formed in the rotating part mounting plate, and a through hole is formed in a mounting plate shell surrounded by the C-shaped guide groove; the driving gear is meshed with the driven gear, the driven gear is fixedly mounted near one end of the C-shaped guide groove of the rotating part mounting plate through a fixing shaft, a stepped hole matched with the first rotating shaft is formed in the center of the driving gear, and the first rotating shaft penetrates through the stepped hole and the through hole to be connected with the helmet body. The structure has the characteristics of simple structure, few parts and the like.

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 operation occasions, such as those working in spray painting workshops, firefighting and disaster relief, 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 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 rotating structure for the upper and lower chin guards of a helmet with a simple structure, a small number of parts, simple processing and manufacturing, convenient 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 rotation structure of a helmet chin guard, characterized in that the chin guard rotation structure includes a driving gear, a driven gear, a rotating component mounting plate, and a first rotating shaft, the rotating component mounting plate is provided with a C-shaped guide groove, and a through hole is provided on the mounting plate shell surrounded by the C-shaped guide groove; the driving gear is meshed with the driven gear, and the driven gear is fixedly mounted on the rotating component mounting plate 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 matching the first rotating shaft, and the first rotating shaft is connected to the helmet body through the stepped hole and the through hole.

[0012] 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, the 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 is provided with a side surface protruding from the driving gear facing the rotating component mounting plate, and slidingly cooperates with the C-shaped guide groove; a radial positioning slider is also connected to the rotating component mounting plate, and the radial positioning groove is snap-fitted with the radial positioning slider; further preferably, the radial positioning slider and the radial positioning slot are slidably cooperated with each other, and 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.

[0013] In order to couple the chin guard with the rotating structure of the chin guard, an inserting groove and a connecting hole of the chin guard are provided on the annular surface between the driving teeth of the driving gear and the stepped hole.

[0014] In order to facilitate the connection between the chin guard and the chin guard rotating part, and at the same time be able to connect the chin guard rotating part with the inner part, for example, the inner part can be a driving block for realizing the linkage between the chin guard and the mask, and at the same time in order to minimize the structural size of the chin guard mounting part and reduce the weight of the chin guard mounting part, the preferred technical solution is that the connecting groove is arranged on the inner side of the driving gear facing the chin guard, and the side of the chin guard facing the driving gear is provided with a connecting tooth matched with the connecting groove, 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.

[0015] In order to ensure that the driving gear is firmly connected to the rotating component mounting plate, the first rotating shaft is a hollow shaft, one end of the first rotating shaft is provided with an end cap that matches the stepped hole, the other end of the first rotating shaft is provided with a radial groove, the other end of the first rotating shaft passes through the stepped hole to match the protrusion provided on the helmet body, and the hollow shaft of the first rotating shaft is connected to the mounting hole on the helmet body through a fastener. When other components are provided on the inner side of the rotating component mounting plate, such as a driving block for realizing the linkage between the chin guard and the mask, the first rotating shaft can also be a through hole passing through other components; the protrusion can be a boss provided in the mounting groove of the helmet body.

[0016] In order to further couple the driving gear with the inner component, a groove is provided on the other side annular surface between the driving tooth of the driving gear and the stepped hole. For example, the inner component may be a driving block for realizing the linkage between the chin guard and the mask; when a convex tooth is provided on the driving block, the groove is engaged with the convex tooth.

[0017] In order to facilitate guiding and limiting the movement trajectory of the drive 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 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 through hole for the first 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 addition, the present invention provides a helmet comprising any of the above-mentioned rotating structures of the chin guard of the helmet.

[0019] In order to ensure that the chin guard and the face mask are stably mounted on the helmet body, and that the chin guard and the face mask can be flexibly rotated on the helmet body and can stop at a set position, a further preferred technical solution is that the mask and the chin guard are symmetrically hinged on both sides of the helmet body through a mask rotation structure and a chin guard rotation structure respectively, mounting grooves are symmetrically arranged on both sides of the helmet body, a mask rotation limiter and a rotating component mounting plate are installed in the mounting grooves, a mask mounting member in the mask rotating component is installed on the inner side of the rotating component mounting plate, the mask is connected to a linkage guide ring member of the chin guard through the mask mounting member, the linkage guide ring member is hinged to the rotating component mounting plate through a second rotating shaft, a driving block matching the inner side of the annular groove is provided in the annular groove on the linkage guide ring member, the driving block passes through the rotating component mounting plate through the first rotating shaft and is connected to the chin guard rotation structure arranged on the outer side of the rotating component mounting plate, and the chin guard rotation structure is respectively connected to the rotating component mounting plate and the chin guard.

[0020] 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 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, and 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 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.

[0021] In order to facilitate the driving block to be driven together through the chin guard and the chin guard rotating part, the driving linkage guide ring part rotates 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 part mounting plate.

[0022] 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.

[0023] In order to facilitate the connection between the mask and the linkage guide ring part and to simplify the installation process, 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 on one side facing the mounting groove is provided near the connection part, and the columnar protrusion and the arc-shaped groove cooperate to constitute a limit for the mask; a first mounting hole of the second 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 second rotating shaft is provided on the rotating component mounting plate, and the second 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 second rotating shaft.

[0024] 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.

[0025] Compared with the helmets disclosed in the above background technology with the same or similar use effects, the rotation structure of the chin guard and the face mask of the helmet is greatly simplified in that the various connecting parts and driving wheel parts for the rotation of the chin guard and the face mask are greatly simplified, and the number of parts is reduced to 1 / 3 to 1 / 5 of the number of parts for installing and driving 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

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the helmet in the rotating structure of the chin guard of the helmet of the present invention;

[0027] Figure 2 It is a schematic diagram of the exploded structure of the connecting structure on one side of the rotating structure of the chin guard of the helmet of the present invention;

[0028] Figure 3 For the present invention Figure 2 A partial enlarged view of the connection structure;

[0029] 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 rotating structure of the helmet chin guard of the present invention;

[0030] 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 rotating structure of the helmet chin guard of the present invention;

[0031] Figure 6It 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 rotating structure of the chin guard of the helmet of the present invention;

[0032] Figure 7 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 drives the face mask to be lifted up at the same time in the working principle of the rotating structure of the chin guard of the helmet of the present invention;

[0033] Figure 8 It is a schematic structural 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 upward to the end state of rotation in the working principle of the rotating structure of the chin guard of the helmet of the present invention;

[0034] Fig. 9 It is a schematic structural 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 upward to the end state of rotation in the working principle of the rotating structure of the chin guard of the helmet of the present invention;

[0035] 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 rotating structure of the chin guard of the helmet of the present invention;

[0036] Fig.11 It is a structural schematic 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 rotating structure of the chin guard of the helmet of the present invention;

[0037] 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 rotating structure of the chin guard of the helmet of the present invention, in which the chin guard also rotates backward to the end state after the upward rotation of the face mask is terminated;

[0038] 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 rotating structure of the chin guard of the helmet of the present invention, in which the chin guard also rotates backward to the end state after the upward rotation of the face mask is terminated;

[0039] Fig.14 It is a schematic structural diagram of the inner side of the mounting plate of the rotating component in the working principle of the rotating structure of the chin guard of the helmet of the present invention, in a state where the chin guard rotates backward to the end point and then the chin guard rotates downward to the end point and then starts to rotate upward;

[0040] Fig.15 It is a structural schematic 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 in the working principle of the rotating structure of the chin guard of the helmet of the present invention;

[0041] Fig.16It 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 rotating structure of the chin guard of the helmet of the present invention;

[0042] 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 shield rotates upward to the end point in the working principle of the rotating structure of the chin guard of the helmet of the present invention;

[0043] Fig.18 The invention relates to a rotating structure of the chin guard of the helmet Figure 1 Schematic diagram of the inner structure of the chin guard.

[0044] In the figure: 1, driving gear; 2, driven gear; 3, fixed shaft; 4, rotating component mounting plate; 5, C-shaped guide groove; 6, first rotating shaft; 7, stepped hole; 8, end cap; 9, radial groove; 10, driving block; 11, through hole; 12, helmet body; 12.1, fastener; 13, mounting groove; 14, boss; 15, bump; 16, mounting hole; 17, plug-in groove; 18, connecting hole; 19, convex tooth; 20, groove; 21, bump; 22, radial positioning groove; 23, radial positioning slider; 2 4. radial positioning groove; 25. elastic member; 26. chin guard; 27. plug-in tooth; 28. mounting hole; 29. ​​mask; 30. mask rotation limiter; 31. mask mounting member; 32. linkage guide ring member; 33. second rotating shaft; 34. annular groove; 35. through hole; 36. mounting hole; 37. fastener; 38. strip slider; 39. fastener; 40. elastic member; 41. strip rod; 42. columnar protrusion; 43. arc-shaped groove; 44. first mounting hole; 45. second mounting hole. DETAILED DESCRIPTION

[0045] 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.

[0046] like Figures 1 to 18As shown, the present invention is a rotation structure of a helmet chin guard, the chin guard rotation structure comprises a driving gear 1, the driving gear 1 is meshed with a driven gear 2, the driven gear 2 is fixedly mounted near one end of a C-shaped guide groove 5 of a rotating component mounting plate 4 through a fixed shaft 3, a stepped hole 7 matching with a first rotating shaft 6 is provided at the center of the driving gear 1, the first rotating shaft 6 is a hollow shaft, one end of the first rotating shaft 6 is provided with an end cap 8 matching with the stepped hole 7, the other end of the first rotating shaft 6 is provided with a radial groove 9, and the other end of the first rotating shaft 6 is provided with a radial groove 9. One end passes through the stepped hole 7 and the through hole 11 on the driving block 10 and cooperates with a protrusion 15 on a boss 14 in the mounting groove 13 set on the helmet body 12, and the hollow shaft of the first rotating shaft 6 is connected to the mounting hole 16 on the boss 14 through a fastener; an insertion groove 17 and a connecting hole 18 for the chin guard 26 are provided on the annular surface between the driving tooth of the driving gear 1 and the stepped hole 7, and a groove 20 that engages with the convex tooth 19 on the driving block 10 is provided on the other side annular surface between the driving tooth of the driving gear 1 and the stepped hole 7.

[0047] In order to facilitate guiding and limiting the movement trajectory of the driving block 10, to facilitate installing the chin guard 26 rotating component on the rotating component mounting plate 4, and at the same time to minimize the structural size and weight of the rotating component mounting plate 4, a preferred embodiment of the present invention is that the driving gear 1 is an incomplete gear, and the incomplete gear is provided with a protrusion 21 on the annular surface without teeth, and the protrusion 21 is provided with a radial positioning groove 22, and the protrusion 21 is provided with a side protruding from the driving gear 1 on the side facing the rotating component mounting plate 4, and is slidably matched with the C-shaped guide groove 5; the radial positioning groove 22 is matched with a radial positioning slider 23, and the radial positioning slider 23 and the radial positioning slot 24 are slidably matched with each other, and the radial positioning slot 24 is installed on the inner side of the rotating component mounting plate 4 by a fastener, and one end of the radial positioning slider 23 passes through the rotating component mounting plate 4 and is located on the outer side of the rotating component mounting plate 4, and an elastic member 25 is provided between the radial positioning slider 23 and the radial positioning slot 24.

[0048] In order to facilitate the connection between the chin guard 26 and the chin guard rotating part, and to be able to connect the chin guard 26 rotating part and the driving block 10 together, and to minimize the structural size of the chin guard mounting part and reduce the weight of the chin guard mounting part, a preferred embodiment of the present invention also has that the connecting groove 17 is arranged on the inner side of the driving gear 1 facing the chin guard 26, and the inner side of the chin guard 26 is provided with a connecting tooth 27 matched with the connecting groove 17, and the chin guard 26 is also provided with a mounting hole 28 corresponding to the connecting hole 18, and fasteners are installed in the connecting hole 18 and the mounting hole 28.

[0049] In order to ensure that the chin guard 26 and the face mask 29 are stably mounted on the helmet body 12, and that the chin guard 26 and the face mask 29 can be flexibly rotated on the helmet body 12 and can stop at a set position, a further preferred embodiment of the present invention is that the face mask 29 and the chin guard 26 are symmetrically hinged on both sides of the helmet body 12 through a face mask rotating structure and a chin guard rotating structure, and mounting grooves 13 are symmetrically arranged on both sides of the helmet body 12, and a face mask rotation limiter 30 and a rotating component mounting plate 4 are installed in the mounting grooves 13, and the rotating component mounting plate 4 A mask mounting part 31 in the mask rotating part is installed on the inner side, the mask 29 is connected to the linkage guide ring part 32 of the chin guard 26 through the mask mounting part 31, the linkage guide ring part 32 is hinged to the rotating part mounting plate 4 through the second rotating shaft 33, and the annular groove 34 on the linkage guide ring part 32 is provided with a driving block 10 that cooperates with the inner side of the annular groove 34, the driving block 10 passes through the rotating part mounting plate 4 through the first rotating shaft 6 and is connected to the chin guard rotating structure arranged on the outer side of the rotating part mounting plate 4, and the chin guard rotating structure is respectively connected to the rotating part mounting plate 4 and the chin guard 26.

[0050] In order to facilitate hiding the mask rotating component and the chin guard rotating component inside the helmet body 12 to prevent them from being damaged and to achieve an aesthetically pleasing appearance, a preferred embodiment of the present invention also has that the mounting grooves 13 are symmetrically arranged on both sides of the helmet body 12, 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 30 mounting groove 13 located on the second layer and the rotating component mounting plate 4 mounting groove located on the first layer, the shape of the mask rotation limiter 30 mounting groove 13 is adapted to the shape of the mask rotation limiter 30, and the shape of the rotating component mounting plate 4 mounting groove is adapted to the shape of the rotating component mounting plate 4.

[0051] In order to facilitate the driving block 10 to be driven together through the chin guard 26 and the chin guard rotating part, the driving linkage guide ring 32 is driven to rotate around the second rotating shaft 33 and drive the mask to rotate together, a preferred embodiment of the present invention also has that the driving block 10 is a triangular sheet body, a through hole 11 is provided in the center of the triangular sheet body, and a convex tooth 19 is provided on the periphery of the through hole 11 on the side of the triangular sheet body facing the rotating part mounting plate 4.

[0052] In order to facilitate guiding and limiting the movement trajectory of the driving block 10, to facilitate installing the chin guard rotating component on the rotating component mounting plate 4, and at the same time to minimize the structural size and weight of the rotating component mounting plate 4, a further preferred embodiment of the present invention is that the rotating component mounting plate 4 is a D-shaped shell structure, and the D-shaped shell structure is provided with a flange on the side facing the mounting groove 13, wherein the flange on the vertical straight side of the D-shaped shell structure is a stepped flange, and a C-shaped guide groove 5 is provided on the rotating component mounting plate 4 of the D-shaped shell structure, and a through hole 35 for the first rotating shaft 6 to pass through is provided on the D-shaped shell surrounded by the C-shaped guide groove, and a mounting hole 36 is also provided on the rotating component mounting plate 4 of the D-shaped shell structure, and the mounting hole 36 fixes the rotating component mounting plate 4 on the mounting groove 13 through a fastener 37.

[0053] In order to effectively limit the rotation range of the mask 29 and at the same time ensure that the mask 29 will not automatically slide down after rotating to a predetermined position, or cause the mask 29 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 30 includes a strip slider 38 and a strip rod 41. The two ends of the strip rod 41 are connected to the mounting groove 13 by fasteners 39, and one side of the strip rod 41 is connected to the strip slider 38 by an elastic member 40. One side of the strip slider 38 is provided with an arc groove 43 for positioning the mask 29, and a plurality of arc grooves with different curvature radii are provided on the arc groove 43 to form a toothed arc limiting guide groove. The strip rod 41 and the strip slider 38 are respectively shell structures, and the concave cavity side of the strip rod 41 and the strip slider 38 faces the mounting groove 13.

[0054] In order to facilitate the connection of the mask and the linkage guide ring member 32 together, and to simplify the installation operation process, a preferred embodiment of the present invention is that the linkage guide ring member 32 is a C-shaped open ring structure, one end of the linkage guide ring member 32 of the C-shaped open ring structure is connected to the mask mounting member 31, and a columnar protrusion 42 on one side facing the mounting groove 13 is provided near the connection position, and the columnar protrusion 42 cooperates with the arc-shaped groove 43 to constitute a limit for the mask; a first mounting hole 44 of the second rotating shaft 33 is provided near the other end of the C-shaped open ring linkage guide ring member 32, and a second mounting hole 45 of the second rotating shaft 33 is provided on the rotating component mounting plate 4, and the second rotating shaft 33 is installed on the rotating component mounting plate 4 through the first mounting hole 44, the second mounting hole 45 and the fastener 12.1 to install the linkage guide ring member 32 and the mask mounting member 31 on the rotating component mounting plate 4, and make the linkage guide ring member 32 and the mask mounting member 31 rotate around the second rotating shaft 33 on the rotating component mounting plate 4.

[0055] In order to minimize the structural dimensions of the linkage guide ring 32, reduce the weight of the linkage guide ring 32, facilitate the connection between the linkage guide ring 32 and the rotating component mounting plate 4, and facilitate the mask to rotate around the second rotating shaft 33, 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 31 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 29, and the inner arc surface side of the strip-shaped arc surface is used to connect with the linkage guide ring 32, or the mask mounting member 31 and the linkage guide ring 32 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 29, and the width of the strip-shaped arc surface is greater than the width of the linkage guide ring 32.

[0056] The working principle of the rotating structure of the helmet chin guard is as follows:

[0057] like Figures 1 to 18 As shown, the helmet body 12 is injection molded by injection molding, and stepped mounting grooves 13 are injection molded on both sides of the helmet body 12. The second layer of the stepped mounting grooves 13 is used to install the mask rotation limiter 30, and the first layer of the stepped mounting grooves 13 is used to install the rotating component mounting plate 4. A linkage guide ring 32 is hingedly installed on the side of the rotating component mounting plate 4 facing the stepped mounting groove 13. The linkage guide ring 32 is a C-shaped ring structure. The C-shaped ring structure linkage guide ring 32 is connected to the rotating component mounting plate 4 near one end through a second rotating shaft 33, and the other end of the C-shaped ring structure linkage guide ring 32 is connected to the mask mounting member 31. The mask mounting member 31 is an arc-shaped strip structure, and a mask 29 is installed on the outer arc surface of the arc-shaped strip structure mask mounting member 31. Near the other end of the C-shaped annular structure linkage guide ring 32, a columnar protrusion 42 is provided on the side facing the stepped mounting groove 13, and the columnar protrusion 42 slides with the arc groove 43 on the strip slider 41 in the mask rotation limiter 30 in the stepped mounting groove 13, and the arc groove 43 on the strip slider 41 is provided with multiple arc grooves with different curvature radii to form a toothed arc limit guide groove for positioning the mask 29, that is, the mask 29 can stay at different positions without slipping. The strip slider 38 slides with the strip rod 41 in the mask rotation limiter 30 through the elastic member (spring) 40, and the strip rod 41 is screw-mounted in the stepped mounting groove 13 by the fastener 39. When the mask 29 is pushed to slide up and down, the mask 29 rotates on the rotating component mounting plate 4 around the second rotating shaft 33 through the mask mounting member 31 and the linkage guide ring member 32. Near the other end of the C-shaped ring structure linkage guide ring member 32, the columnar protrusion 42 on one side of the step mounting groove 13 will slide in the arc groove 43 on the strip slider 38. Under the action of the elastic member (spring) 40, the strip slider 38 always maintains a pressing contact with the columnar protrusion 42. A guide groove and a guide strip are also provided between the strip slider 38 and the strip rod 41.

[0058] A driving block 10 is also provided inside the ring of the C-shaped annular structure linkage guide ring member 32. The driving block 10 is in a triangular structure and can be used to drive the C-shaped annular structure linkage guide ring member 32. When the chin guard 26 and the mask 29 are initially located at the lowest end, when the chin guard 26 needs to be lifted upward, the right vertex corner of the driving block 10 in the triangular structure, driven by the first rotating shaft 6, contacts the inner ring of the C-shaped straight edge section of the C-shaped annular structure linkage guide ring member 32 close to the second rotating shaft 33. The right vertex corner of the driving block 10 in the triangular structure presses the C-shaped structure to rotate clockwise around the second rotating shaft 33, which pushes the mask 29 to be lifted upward together. When the mask 29 is lifted upward to the end point, the right vertex corner of the driving block 10 in the triangular structure has rotated to the arc section of the C-shaped ring. At this time, the mask 29 can be rotated downward or upward alone, and the chin guard 26 can also continue to flip upward and backward. When the chin guard 26 flips backward to the end point, the three The right top corner of the angular structure driving block 10 has been rotated to the left side of the arc segment of the C-shaped ring, and the left top corner of the triangular structure driving block 10 has been rotated to the right side of the arc segment of the C-shaped ring. If the chin guard 26 needs to be flipped upward and forward, if the mask 29 is located at the lower end of the helmet body 12, the triangular structure driving block 10 rotates counterclockwise under the drive of the first rotating shaft 6, and the left top corner of the triangular structure driving block 10 will contact and press with the inner ring of the C-shaped straight edge segment of the linkage guide ring 32, so that the mask 29 is lifted upward to the end point, or the mask 29 is lifted upward to the upward end position in advance, and then the left top corner of the triangular structure driving block 10 rotates and resets to the left side of the original position in the opening section of the C-shaped ring. At this time, the mask 29 can be rotated downward to the initial position again.

[0059] The triangular structure driving block 10 is a hollow shaft structure, and a convex tooth 19 is provided at the port portion of the hollow shaft facing the rotating component mounting plate 4. The rotating component mounting plate 4 is a D-shaped shell structure, and the D-shaped shell structure is provided with a flange on the side facing the mounting groove 13, wherein the flange on the vertical straight side of the D-shaped shell structure is a stepped flange, and a C-shaped guide groove 5 is provided on the rotating component mounting plate 4 of the D-shaped shell structure, and a through hole 35 for the first rotating shaft 6 to pass through is provided on the D-shaped shell surrounded by the C-shaped guide groove, and a mounting hole 36 is also provided on the rotating component mounting plate 4 of the D-shaped shell structure, and the mounting hole 36 fixes the rotating component mounting plate 4 on the mounting groove 13 through a fastener (screw) 37. The chin guard rotating part includes a driving gear 1, which meshes with a driven gear 2. The driven gear 2 is fixedly installed near one end of a C-shaped guide groove 5 through a fixed shaft 3. A stepped hole 7 is provided at the center of the driving gear 1 to cooperate with a first rotating shaft 6. The first rotating shaft 6 is a hollow shaft. An end cap 8 is provided at one end of the first rotating shaft 6 to cooperate with the stepped hole 7. A radial groove 9 is provided at the other end of the first rotating shaft 6. The other end of the first rotating shaft 6 passes through the stepped hole 7 and a through hole 11 on a driving block 10 to cooperate with a protrusion 15 on a boss 14 arranged in a mounting groove 13. The hollow shaft of the first rotating shaft 6 is connected to the mounting hole 16 on the boss 14 through a fastener (screw) 12.1; the driving gear 1 is provided with a plug-in groove 17 and a connecting hole 18 for a chin guard 26 on the annular surface between the driving tooth and the stepped hole 7, and a groove 20 is provided on the other side annular surface of the driving gear 1 between the driving tooth and the stepped hole 7 to engage with the protruding tooth 19 on the driving block 10. The driving gear 1 is an incomplete gear. A protrusion 21 is provided on the annular surface without teeth of the incomplete gear. A radial positioning groove 22 is provided on the protrusion 21. The protrusion 21 protrudes from the side of the driving gear 1 toward the rotating component mounting plate 4 and slides with the C-shaped guide groove 5. The radial positioning groove 22 cooperates with a radial positioning slider 23. The radial positioning slider 23 and the radial positioning slide groove 24 slide with each other. The radial positioning slide groove 24 is installed on the inner side of the rotating component mounting plate 4 through a fastener. One end of the radial positioning slider 23 passes through the rotating component mounting plate 4 and is located on the outer side of the rotating component mounting plate 4. An elastic member (spring) 25 is provided between the radial positioning slider 23 and the radial positioning slide groove 24. A plug-in tooth 18 matching the plug-in groove 17 is provided on the side of the chin guard 26 facing the driving gear 1. A mounting hole 45 corresponding to the connecting hole 18 is also provided on the chin guard 26. Fasteners are installed in the connecting hole 18 and the mounting hole 28.

[0060] When the chin guard 26 is pushed to rotate, the chin guard 26 is connected with the plug-in groove 17 and the connecting hole 18 on the ring surface of the driving gear 1 through the plug-in teeth 27 and the fasteners (screws) arranged on the inner side, so as to push the driving gear 1 to rotate, and the groove 20 arranged on the other side of the driving gear 1 is engaged with the convex teeth 19 on the driving block 10 to rotate the driving block 10. Since the driving gear 1 is an incomplete gear, it cannot rotate one circle, so the chin guard 26 cannot rotate one circle. In addition, a protrusion 21 is arranged at one end of the incomplete gear tooth, and a radial positioning groove 22 is also arranged on the protrusion 21. After the radial positioning groove 22 rotates to the set position, it is stuck by a radial positioning slider 23 and cannot continue to rotate. The radial positioning slider 23 slides with the radial positioning slide groove 24 installed on the inner side of the rotating component mounting plate 4 through the elastic member (spring) 25. The first rotating shaft 6 is a hollow shaft, which is connected to the mounting hole of the boss provided on the mounting groove 13 through the fastener (screw) 12.1 passing through the hollow first rotating shaft 6, the triangular driving block 10. When the driving gear 1 rotates, one side of the protrusion 21 at one end of the incomplete gear tooth slides with the C-shaped guide groove 5 provided on the rotating component mounting plate 4.

[0061] 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 rotating structure of a helmet chin guard, characterized in that: The chin guard rotating structure comprises a driving gear (1), a driven gear (2), a rotating component mounting plate (4), and a first rotating shaft (6); the rotating component mounting plate (4) is provided with a C-shaped guide groove (5); a through hole (35) is provided on the mounting plate shell surrounded by the C-shaped guide groove (5); the driving gear (1) is meshed with the driven gear (2); the driven gear (2) is fixedly mounted near one end of the C-shaped guide groove (5) of the rotating component mounting plate (4) through a fixed shaft (3); a stepped hole (7) matched with the first rotating shaft (6) is provided at the center of the driving gear (1); the first rotating shaft (6) passes through the stepped hole (7) and the through hole (35) to be connected with the helmet body.

2. The rotating structure of the helmet chin guard as claimed in claim 1, characterized in that: The driving gear (1) is an incomplete gear. A protrusion (21) is provided on a ring surface without teeth of the incomplete gear. A radial positioning groove (22) is provided on the protrusion (21). A side of the protrusion (21) facing the rotating component mounting plate (4) is provided with a side surface protruding from the driving gear (1) and slidingly engaged with the C-shaped guide groove (5). A radial positioning slide block (23) is also connected to the rotating component mounting plate (4). The radial positioning groove (22) is engaged with the radial positioning slide block (23).

3. The rotating structure of the helmet chin guard as claimed in claim 2, characterized in that: The radial positioning slider (23) and the radial positioning slot (24) are slidably matched with each other. The radial positioning slot (24) is installed on the inner side of the rotating component mounting plate (4) through a fastener. One end of the radial positioning slider (23) passes through the rotating component mounting plate (4) and is located on the outer side of the rotating component mounting plate (4). An elastic member (25) is provided between the radial positioning slider (23) and the radial positioning slot (24).

4. The rotating structure of the helmet chin guard as claimed in claim 1, characterized in that: An inserting groove (17) and a connecting hole (18) of a chin guard (26) are arranged on the annular surface between the driving tooth of the driving gear (1) and the stepped hole (7).

5. The rotating structure of the helmet chin guard as claimed in claim 4, characterized in that: The plug-in slot (17) is arranged on the inner side of the driving gear (1) facing the chin guard (26), and a plug-in tooth (27) matching the plug-in slot (17) is arranged on the inner side of the chin guard (26). The chin guard (26) is also provided with a mounting hole (28) corresponding to the connecting hole (18), and fasteners are installed in the connecting hole (18) and the mounting hole (28).

6. The rotating structure of the helmet chin guard as claimed in claim 1, characterized in that: The first rotating shaft (6) is a hollow shaft. One end of the first rotating shaft (6) is provided with an end cap (8) that matches the stepped hole (7). The other end of the first rotating shaft (6) is provided with a radial groove (9). The other end of the first rotating shaft (6) passes through the stepped hole (7) and matches with a protrusion (15) provided on the helmet body (12). The hollow shaft of the first rotating shaft (6) is connected to a mounting hole (16) on the helmet body (12) via a fastener.

7. The rotating structure of the helmet chin guard as claimed in claim 1, characterized in that: A groove (20) is provided on the other side annular surface between the driving tooth of the driving gear (1) and the stepped hole (7).

8. The rotating structure of the helmet chin guard as claimed in claim 1, characterized in that: The rotating component mounting plate (4) is in the form of a D-shaped shell structure. The D-shaped shell structure is provided with flanges on one side facing the mounting grooves (13) on both sides of the helmet body, wherein the flanges on the vertical straight side of the D-shaped shell structure are stepped flanges. The rotating component mounting plate (4) of the D-shaped shell structure is also provided with mounting holes (36). The mounting holes (36) are used to fix the rotating component mounting plate (4) on the mounting grooves (13) via fasteners (37).

9. A helmet, characterized in that: The helmet comprises the rotating structure of the helmet chin guard according to any one of claims 1-8.

10. The helmet according to claim 9, characterized in that The helmet comprises a helmet body (12), a mask (29) and a chin guard (26) are symmetrically hinged on both sides of the helmet body (12) through a mask rotating structure and a chin guard rotating structure, mounting grooves (13) are symmetrically arranged on both sides of the helmet body (12), a mask rotating limiter (30) and a rotating component mounting plate (4) are mounted in the mounting grooves (13), a mask mounting member (31) in the mask rotating component is mounted on the inner side of the rotating component mounting plate (4), and the mask (29) is connected to the chin guard through the mask mounting member (31). The linkage guide ring member (32) is connected to the rotating component mounting plate (26), the linkage guide ring member (32) is hinged to the rotating component mounting plate (4) through a second rotating shaft (33), a driving block (10) matched with the inner side of the annular groove (34) is provided in the annular groove (34) on the linkage guide ring member (32), the driving block (10) passes through the rotating component mounting plate (4) through the first rotating shaft (6) and is connected to the chin guard rotating structure arranged on the outer side of the rotating component mounting plate (4), and the chin guard rotating structure is respectively connected to the rotating component mounting plate (4) and the chin guard (26).

11. The helmet according to claim 10, characterized in that The mounting grooves (13) are symmetrically arranged on both sides of the helmet body (12), 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 (30) mounting groove (13) located on the second layer, and a rotating component mounting plate (4) mounting groove located on the first layer, the shape of the mask rotation limiter (30) mounting groove (13) being adapted to the shape of the mask rotation limiter (30), and the shape of the rotating component mounting plate (4) mounting groove being adapted to the shape of the rotating component mounting plate (4).

12. The helmet according to claim 10, characterized in that The driving block (10) is in the form of a triangular sheet, a through hole (11) is provided at the center of the triangular sheet, and convex teeth (19) are provided around the through hole (11) on the side of the triangular sheet facing the rotating component mounting plate (4).

13. The helmet according to claim 10, characterized in that The mask rotation limiting member (30) comprises a strip-shaped slider (38) and a strip-shaped rod (41). The two ends of the strip-shaped rod (41) are connected to the mounting groove (13) via fasteners (39). One side of the strip-shaped rod (41) is connected to the strip-shaped slider (38) via an elastic member (40). One side of the strip-shaped slider (38) is provided with an arc-shaped groove (43) for positioning the mask (29). The arc-shaped groove (43) 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 (41) and the strip-shaped slider (38) are respectively shell structures. The concave cavity side of the strip-shaped rod (41) and the strip-shaped slider (38) faces the mounting groove (13).

14. The helmet according to claim 13, characterized in that The linkage guide ring member (32) is a C-shaped open ring structure. One end of the linkage guide ring member (32) of the C-shaped open ring structure is connected to the mask mounting member (31), and a columnar protrusion (42) facing the mounting groove (13) is provided near the connection portion. The columnar protrusion (42) cooperates with the arc-shaped groove (43) to form a limit for the mask. A first mounting hole (44) of the second rotating shaft (33) is provided near the other end of the C-shaped open ring linkage guide ring member (32). A second mounting hole (45) of the second rotating shaft (33) is provided on the rotating component mounting plate (4). The second rotating shaft (33) is installed on the rotating component mounting plate (4) through the first mounting hole (44), the second mounting hole (45) and the fastener to install the linkage guide ring member (32) and the mask mounting member (31) on the rotating component mounting plate (4), so that the linkage guide ring member (32) and the mask mounting member (31) rotate on the rotating component mounting plate (4) around the second rotating shaft (33).

15. The helmet according to claim 10, characterized in that The mask mounting member (31) 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 (29), and the inner arc surface of the strip-shaped arc surface is used to connect with the linkage guide ring member (32), or the mask mounting member (31) and the linkage guide ring member (32) 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 (29), and the width of the strip-shaped arc surface is greater than the width of the linkage guide ring member (32).

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