A helmet lens lock catch and chin guard switch interlock

Abstract

The utility model discloses a helmet lens lock catch and chin guard switch linkage structure, this helmet includes the casing, the face one side of casing is provided with lens and chin guard, is provided with mouth air window spare on chin guard, and the casing is steel body structure, and the lens adopts transparent material to make, and the lens edge is equipped with the clamping structure, and the chin guard inboard is equipped with the installation support and guide support of lens lock catch subassembly, and the lens lock catch subassembly is installed on installation support and guide support, the inboard of chin guard still is equipped with chin guard switch push rod, and the one end of chin guard switch push rod is equipped with linkage structure between lens lock catch subassembly, and the inboard of chin guard still is equipped with the clamping guide piece of chin guard switch push rod, and the clamping guide piece and mouth air window spare of setting in chin guard outside are connected each other through first connecting piece and pass through chin guard, and chin guard switch push rod slides between the guide groove of guide support and clamping guide piece.

Description

Technical Field

[0001] This utility model relates to safety helmets, and more specifically to a linkage structure for a helmet visor buckle and a chin guard switch that includes an eye shield and a chin guard. Background Technology

[0002] In most jurisdictions worldwide, regulations require workers in potentially hazardous environments such as construction sites, cyclists, and especially motorcyclists to wear safety helmets or "hard hats" to prevent serious head injuries in the event of an accident. Many different types of safety helmets are well-known and widely used across various industries.

[0003] For certain activities where there is a risk of facial injury or where eye protection is required, workers can wear a safety helmet consisting of a helmet shell and a transparent face shield. The face shield is mounted on the helmet shell and can be moved from a raised / folded position to a lowered, operable position in front of or in front of the user, substantially at right angles to the user's line of sight.

[0004] Many different helmets equipped with visors are known and widely used. For example, opposing pivot pins can be mounted on the respective sides of the helmet shell and engage with the opposite side edges of the transparent visor, allowing it to pivot up and down as needed.

[0005] CN 118450828 A discloses a protective helmet suitable for wear by a user to protect the user's head from impact, including a rigid shell defining an internal space designed to accommodate the user's head and including a front opening. The protective helmet also includes a visor removably coupled to the shell and adapted to move at least between an operating position and a non-operating position. In the operating position, the visor covers the front opening and prevents air from entering the internal space. In the non-operating position, the internal space can be accessed from the outside through the front opening. The visor has a front aperture. The protective helmet also includes a locking device designed to lock the visor in the operating position. The locking device is positioned on the shell and includes a rotatable engagement member designed to engage the front aperture of the visor when the visor is in the operating position.

[0006] Most existing helmets operate the visor and chin guard separately, meaning that the chin guard cannot be opened or closed simultaneously with the visor, or vice versa.

[0007] The applicant's Chinese patent CN112568539B, filed in 2020, discloses a helmet with a chin guard and face shield that rotate in conjunction. The helmet includes a helmet body, with a face shield and chin guard symmetrically hinged to a mounting groove on the side of the helmet body. The mounting groove contains a face shield rotation limiting component, a face shield mounting component, a linkage guide ring connected to the face shield mounting component, a drive rod engaging with an annular groove on the linkage guide ring, a chin guard mounting component connected to the drive rod via a hinge, and a chin guard rotation guide clamped between the drive rod and the chin guard mounting component. The chin guard rotation guide has a double-track guide groove for guiding the rotation of the chin guard. Hinges at both ends of the drive rod pass through the double-track guide groove and connect to the chin guard mounting component. The face shield rotation limiting component is mounted on the mounting groove via a connector. The linkage guide ring is hinged to the chin guard rotation guide via a first rotating shaft. The chin guard rotation guide is connected to the mounting groove via a connector. Although the technical solution disclosed in this patent can realize the opening and closing linkage operation of the chin shield and the lens, it is not convenient to realize the independent opening and closing operation of the lens. In addition, the structure of the above technical solution is relatively complex and the processing and manufacturing cost is relatively high. Utility Model Content

[0008] The purpose of this utility model is to overcome the defects in the existing technology and provide a linkage structure for the helmet lens buckle and chin guard switch that can realize both linkage operation and individual lens opening and closing operation of the helmet lens and chin guard. It is simple in structure, convenient to use, easy to operate, easy to process and manufacture, and has a relatively low processing and manufacturing cost.

[0009] To achieve the above objectives, the technical solution of this utility model is to design a linkage structure for a helmet visor latch and a chin guard switch. The helmet includes a shell, with a visor and a chin guard on the face side of the shell. A mouth vent is provided on the chin guard. The left and right sides of the visor and the left and right sides of the chin guard are respectively hinged to the left and right sides of the shell. The shell is a steel structure, and the visor is made of transparent material. A snap-fit ​​structure is provided on the edge of the visor. The inner side of the chin guard is provided with a mounting bracket and a guide bracket for mounting the visor latch assembly. The lens locking assembly is mounted on the mounting bracket and the guide bracket; a chin shield switch push rod is also provided on the inner side of the chin shield, one end of the chin shield switch push rod is linked to the lens locking assembly, and a clamping guide for the chin shield switch push rod is also provided on the inner side of the chin shield, the clamping guide and the mouth window component provided on the outer side of the chin shield are connected to each other through the chin shield via a first connector, and the chin shield switch push rod slides between the guide bracket and the guide groove provided on the clamping guide.

[0010] The visor locking mechanism of this helmet, which links the visor latch to the chin guard switch, can be operated independently to open or close the visor. Alternatively, operating the chin guard switch push rod simultaneously activates the visor locking assembly and opens the visor. Both the visor locking assembly and the chin guard switch push rod are mounted inside the chin guard. This ingeniously designed, simple, and easy-to-operate linkage mechanism between the chin guard unlocking mechanism and the visor locking assembly is cost-effective and easy to manufacture.

[0011] To facilitate individual operation of opening or closing the lens, and to ensure simple opening and closing of the lens, and a secure locking mechanism when closed, the preferred technical solution is as follows: The lens locking assembly includes a rotating shaft, on which a rotating arm and a first reset elastic element are mounted. The end of the rotating arm has a first hook for engaging with the locking structure on the lens. One side of the rotating arm has a groove for engaging with the upper end of the chin guard switch push rod, and a first groove for pressing against the first reset elastic element. The other side of the rotating arm has a lens locking switch button.

[0012] To facilitate the installation of the lens locking assembly, prevent the pivot in the locking assembly from easily falling off, ensure the switch button in the locking assembly automatically resets after being pressed, and facilitate the linkage between the chin guard switch push rod and the locking assembly, a preferred technical solution is as follows: The mounting bracket includes a pair of brackets for supporting the pivot and a pair of limiting members for limiting the pivot. The pair of brackets is disposed between the pair of limiting members, and the guide bracket is disposed between the pair of brackets. The guide bracket has a second groove for the pivot to pass through. The pivot is mounted on the pair of brackets, and the reset elastic member is fitted onto the pivot, with one end of the reset elastic member pressing against the first groove and the other end pressing against the inner side of the chin guard.

[0013] To ensure that when operating the chin guard switch push rod, the latch between the chin guard and the helmet shell can disengage, and simultaneously, the sliding groove on the rotating arm in the latch assembly can be pushed, forcing the rotating arm to rotate around the pivot and disengage the first hook from the lens, a further preferred technical solution is as follows: The chin guard switch push rod has an inverted T-shaped structure. The upper part of the inverted T-shaped chin guard switch push rod is provided with a push rod head for engaging with the sliding groove, and a U-shaped through groove is provided on the upper part of the push rod head. The push rod heads located on both sides of the U-shaped through groove slide in engagement with the sides of the guide bracket.

[0014] To facilitate clamping the inverted T-shaped chin guard switch push rod between the clamping guide and the inner surface of the chin guard, while also allowing it to slide within the guide groove on the clamping guide and enabling the slider hook to engage the reset wire rope, a further preferred technical solution is provided. The lower part of the inverted T-shaped chin guard switch push rod, facing inwards towards the chin guard, has an outwardly protruding push-pull edge. The lower part of the inverted T-shaped chin guard switch push rod, facing inwards towards the housing, has an outwardly protruding frame and reinforcing rib. An outwardly protruding hook-shaped slider is provided on the frame. A slider hook, for engaging the reset wire rope, is provided in the middle of the inverted T-shaped chin guard switch push rod facing towards the housing. The slider hook extends out of the guide groove on the clamping guide and slides within the guide groove.

[0015] To facilitate the installation of the inverted T-shaped chin guard switch push rod and guide its sliding within the chin guard, allowing it to smoothly move up and down to disengage or lock the chin guard from the housing, and simultaneously disengage the lens locking assembly from the lens, a further preferred technical solution includes: The clamping guide has a third groove on its inner side facing the chin guard for engaging with the frame and reinforcing ribs; first through slots on both sides of the third groove for sliding engagement with the hook-shaped slider; at least three first through holes around the clamping guide for the first connecting member to pass through; and reinforcing posts around the first through holes.

[0016] To facilitate the placement of the reset wire rope on the slider hook and guide its placement along the wire rope guide groove, thus preventing the wire rope from becoming uncontrollable, a further preferred technical solution is to attach a reset wire rope to the slider hook and provide reset wire rope guide grooves extending from the sides of the clamping guide on both sides of the guide groove.

[0017] To enable the reset wire rope to pull the second elastic element via the inverted T-shaped chin guard switch push rod, thereby unlocking or locking the chin guard and helmet shell together, a further preferred technical solution is to provide a reset wire rope guide ring and an unlocking assembly for the chin guard, both connected to the inner side of the chin guard. A second elastic element for resetting the reset wire rope is connected to the unlocking assembly.

[0018] To facilitate the control of the mouth vent's ventilation opening via a key located between the mouth vent and the chin guard, thereby controlling the airflow into the helmet or switching between airflow intake and vent closure, a further preferred technical solution includes: a Y-shaped mouth vent key on the side of the mouth vent facing the chin guard; a protrusion on the side of the Y-shaped mouth vent key facing the outer surface of the chin guard; a fourth groove below the protrusion for sliding engagement with a mounting plate that mates with the mouth vent key; a push-pull button protruding outwards on the other side of the Y-shaped mouth vent key; a fourth through groove on the upper part of the mounting plate for sliding engagement with the protrusion; and a connecting plate hook on the side of the mouth vent facing the chin guard for engaging with the upper and lower ends of the mounting plate. The connecting plate hook includes upper and lower hooks, and a lower hook on the lower end of the mounting plate engages with the lower hook on the side of the mouth vent facing the chin guard.

[0019] To facilitate the operation of the lens locking switch button and the inverted T-shaped chin shield switch push rod button, to facilitate the connection of the mouth window component and the clamping guide, and to clamp the inverted T-shaped chin shield switch push rod between the inner side of the chin shield and the clamping guide, and to clamp the Y-shaped mouth window component switch and the connecting plate between the mouth window and the outer side of the chin shield, a further preferred technical solution is also available. The chin guard and the mouth window are respectively provided with a second through hole and a third through hole for the lens locking switch button to pass through. The mouth window is also provided with a fourth through hole for the inverted T-shaped chin guard switch push rod button to pass through. The mouth window is provided with a connecting protrusion for connecting to the connector on the side facing the chin guard. The connecting protrusion has an axial center blind hole. The chin guard is provided with a fifth through hole for the connecting protrusion to pass through. One side of the mounting plate is slidably engaged with the Y-shaped mouth window switch. The upper and lower ends of the mounting plate are engaged with the upper and lower hooks provided on the inner side of the mouth window. The connecting protrusion on the side of the mouth window facing the chin guard passes through the fifth through hole on the chin guard and is connected to the first through hole on the clamping guide by a connector. The chin guard and the mouth window are respectively provided with a sixth through hole and a seventh through hole for the operation of the chin guard switch push rod.

[0020] To ensure that the lens locking assembly, mounting bracket, guide bracket, inverted T-shaped chin guard switch push rod, and clamping guide are concealed inside the chin guard and to prevent the pivot in the locking assembly from detaching, a preferred technical solution is to provide an inner protective plate inside the chin guard. This inner protective plate is connected to the inside of the chin guard via a connector, and a limiting mating surface is provided on the inner protective plate to conceal the pivot.

[0021] To facilitate the engagement of the lens edge with the lens locking assembly located within the chin guard, enabling locking and unlocking of the lens, and to enhance the aesthetics of the lens's outer surface, a preferred technical solution is provided. The lens edge is equipped with a snap-fit ​​structure, including a second hook protruding from the center of the inner edge of the lens, and a raised edge also present on the outer side of the lens edge.

[0022] Some helmets have both an outer and an inner lens; the lens described in this application is the outer lens of the helmet.

[0023] The advantages and beneficial effects of this utility model are as follows: the linkage structure between the helmet lens lock and the chin guard switch can realize both linkage opening and closing operation of the helmet lens and the chin guard, as well as lens opening and closing operation independently. Moreover, its structure is simple, convenient to use, easy to operate, easy to process and manufacture, and the processing and manufacturing cost is relatively low.

[0024] The linkage structure between the helmet visor latch and the chin guard switch has a visor latch assembly and a chin guard switch push rod located inside the chin guard. The visor latch assembly has a rotating shaft mounted on a mounting bracket inside the chin guard, with a rotating arm hinged to the shaft. The rotating arm has a groove for engaging with the end of the chin guard switch push rod. When the end of the chin guard switch push rod engages with the groove on the rotating arm, it pushes the rotating arm to rotate around the shaft, causing the first hook at the end of the rotating arm to disengage from the second hook on the visor, allowing the visor to rotate upwards and open. Similarly, the visor latch switch button on the other side of the rotating arm can also push the rotating arm to rotate around the shaft, causing the first hook at the end of the rotating arm to disengage from the second hook on the visor, allowing the visor to rotate upwards and open. After the rotating arm is pushed by the lens locking switch button or rotated by the end of the chin guard switch push rod, it can return to its original position under the action of the first elastic element. This allows the first hook at the end of the rotating arm to securely lock together with the second hook on the lens once the lens has returned to its original position. The slider hook on the chin guard switch push rod can hook onto the middle of a steel cable, the two ends of which are connected to the lower chin guard locking mechanism. A second reset elastic element is located at the lower chin guard locking mechanism connection. When the operator pushes the chin guard switch push rod upwards, the push rod head simultaneously rotates the rotating arm and pulls the steel cable, disengaging the lower chin guard from the locking mechanism on the helmet side, allowing the chin guard to rotate around both sides of the helmet shell. When the operator releases the chin guard switch lever, the lever is forced to reset by the second reset elastic element. After resetting, the chin guard can then be securely locked to the helmet shell, without affecting the lens's secure engagement with the lens locking assembly. Thus, the chin guard switch lever can simultaneously drive both the lens and lens locking assembly, and also control the unlocking of the lock between the chin guard and the helmet shell. After the chin guard switch lever resets under the action of the second reset elastic element and the steel cable, the lens can be securely engaged with the lens locking assembly, and the chin guard can be securely locked to the helmet shell. However, the chin guard switch push rod is installed on the inside of the chin guard via a clamping guide, and the clamping guide is connected to the mouth window component located on the outside of the chin guard. The mouth window component is connected to the clamping guide via a connecting post passing through the chin guard using a first connector, i.e., a screw. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the helmet in the linkage structure of the helmet lens buckle and chin guard switch of this utility model; Figure 2 yes Figure 1A schematic diagram of the AA cross-sectional structure; Figure 3 This is an exploded structural diagram of the chin guard portion in the linkage mechanism between the helmet visor buckle and the chin guard switch. Figure 4 This is a magnified view of a portion of the lens locking assembly in the linkage structure between the helmet lens lock and the chin guard switch; Figure 5 yes Figure 4 A magnified view of the middle lens locking assembly from another perspective; Figure 6 This is a partial enlarged schematic diagram of the inner side of the chin guard in the linkage structure between the helmet visor buckle and the chin guard switch; Figure 7 This is a partial enlarged structural diagram of the inner side of the mouth vent component in the linkage structure between the helmet visor buckle and the chin guard switch; Figure 8 This is an enlarged schematic diagram of the chin guard switch push rod in the linkage structure between the helmet visor buckle and the chin guard switch; Figure 9 This is a partially enlarged schematic diagram of the guide component held in the linkage structure between the helmet visor buckle and the chin guard switch; Figure 10 yes Figure 9 A partially enlarged structural diagram of the guide component held in the middle from another perspective; Figure 11 This is an enlarged schematic diagram of the Y-shaped mouth window switch in the linkage structure between the helmet visor buckle and the chin guard switch; Figure 12 yes Figure 11 A magnified view of the Y-shaped windshield switch from another angle; Figure 13 This is a schematic diagram of the connecting plate in the linkage mechanism between the helmet visor buckle and the chin guard switch.

[0026] In the diagram: 1. Housing; 2. Lens; 21. Second hook; 22. Protruding edge; 3. Chin protector; 31. Mounting bracket; 311. A pair of brackets; 312. A pair of limiting members; 32. Guide bracket; 321. Second groove; 33. Second through hole; 34. Fifth through hole; 35. Sixth through hole; 4. Mouth vent; 41. Third through hole; 42. Fourth through hole; 43. Connecting protrusion; 431. Axial center blind hole; 44. Connecting plate hook; 45. Seventh through hole; 5. Lens locking assembly; 51. Rotating shaft; 52. Rotating arm; 521. Slide groove; 522. First groove; 523. Lens locking switch button; 53. First reset elastic member; 54. First hook. 6. Chin guard switch push rod; 61. Push rod head; 62. U-shaped through groove; 63. Push-pull protrusion; 64. Frame; 641. Hook-shaped slider; 65. Reinforcing rib; 66. Slider hook; 7. Clamping guide; 71. Guide groove; 72. Third groove; 73. First through groove; 74. First through hole; 75. Reinforcing column; 76. Reset wire rope guide groove; 8. First connector; 9. Reset wire rope guide ring; 10. Unlocking component; 11. Mouth window component switch; 111. Protrusion; 112. Fourth groove; 113. Push-pull button; 12. Mounting plate; 121. Fourth through groove; 122. Mounting plate lower hook; 13. Inner protective plate; 131. Limiting mating surface. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0028] according to Figures 1-3As shown, this utility model is a linkage structure for a helmet visor latch and a chin guard switch. The helmet includes a shell 1, with a visor 2 and a chin guard 3 on the face side of the shell 1. A mouth vent 4 is provided on the chin guard 3. The left and right sides of the visor 2 and the left and right sides of the chin guard 3 are respectively hinged to the left and right sides of the shell 1. The shell 1 is a steel structure, and the visor 2 is made of transparent material. A snap-fit ​​structure is provided on the edge of the visor 2. The inner side of the chin guard 3 is provided with a mounting bracket 31 and a guide bracket 32 ​​for mounting the visor latch assembly 5. The visor latch assembly 5 is mounted on... The chin shield is mounted on the mounting bracket 31 and the guide bracket 32. A chin shield switch push rod 6 is also provided on the inner side of the chin shield 3. One end of the chin shield switch push rod 6 is linked to the lens locking assembly 5. A clamping guide 7 for the chin shield switch push rod 6 is also provided on the inner side of the chin shield 3. The clamping guide 7 and the mouth window 4 provided on the outer side of the chin shield 3 are connected to each other through the chin shield 3 via the first connector 8. The chin shield switch push rod 6 slides between the guide bracket 32 ​​and the guide groove 71 provided on the clamping guide 7.

[0029] The helmet shell 1 is a steel structure, which can be made of metal, fiberglass, carbon fiber, or plastic. The lens 2 can be made of transparent acrylic or other transparent plastic materials. The chin guard 3 can be made of the same material as the helmet shell 1, or it can be made of injection-molded plastic. The lens 2 and chin guard 3 are connected to both sides of the helmet shell 1 by a hinge structure, and the specific connection structure can adopt existing connection structures. The preferred structure for the lens edge is to provide an inwardly protruding hook edge, namely the second hook 21, on the inner edge of the lens. The mounting bracket 31 and the guide bracket 32 ​​are set on the inner side of the chin guard 3, firstly to improve the appearance of the chin guard, and secondly to facilitate the linkage with the chin guard switch push rod 6 for unlocking the chin guard 3. The guide bracket 32 ​​is mainly used to guide the sliding of the chin guard switch push rod 6 and to slide in the groove 521 in the lens locking assembly 5, while also strengthening the support of the pivot 51 in the lens locking assembly 5. The clamping guide 7 is used to guide the chin guard switch push rod 6 to slide up and down inside the chin guard 3, and a guide groove 71 is provided on the clamping guide 7. The mouth vent 4 is used to control the amount of ventilation in the helmet mouth guard 3, and can also control the opening or closing of the vent. The mouth vent 4 is also connected to the clamping guide 7 through the chin guard 3 via a connecting post and a first connector (screw).

[0030] The lens locking assembly 5 in the linkage structure between the helmet lens latch and the chin guard switch can be operated independently to open or close the lens 2. Alternatively, by operating the chin guard switch push rod 6, the lens locking assembly 5 is simultaneously activated by opening the chin guard unlocking assembly 10, thus opening the lens 2. Both the lens locking assembly 5 and the chin guard switch push rod 6 are installed inside the chin guard 3. This linkage structure, where the chin guard unlocking assembly 10 opens and the lens locking assembly 5 opens the lens 2, is ingeniously designed, simple in structure, easy to operate, easy to manufacture, and inexpensive to produce.

[0031] To facilitate independent operation of opening or closing lens 2, and to ensure simple opening and closing operation of lens 2, and a secure locking mechanism after closing, the preferred embodiment of this utility model is as follows: Figure 4 , 5 As shown, the lens locking assembly 5 includes a rotating shaft 51, on which a rotating arm 52 and a first reset elastic member 53 are provided. The end of the rotating arm 52 is provided with a first hook 54 for engaging with the snap-fit ​​structure provided on the lens 2. One side of the rotating arm 52 is provided with a sliding groove 521 for engaging with the upper end of the chin shield switch push rod 6, and a first groove 522 for pressing against the first reset elastic member 53. The other side of the rotating arm 52 is provided with a lens locking switch button 523.

[0032] The rotating shaft 51 and rotating arm 52 in the lens locking assembly 5 can both be made of injection molded parts. The first reset elastic element 53 is preferably a torsion spring. The first hook 54 is located at the upper end of the rotating arm 52. This hook can engage with the second hook 21 on the lens 2. The slide groove 521 on one side of the rotating arm 52 is used to engage with the push rod head 61 at the end of the chin shield switch push rod 6 to push the rotating arm 52 to rotate around the rotating shaft 51, so that the first hook 54 and the second hook 21 are disengaged. Similarly, the lens locking switch button 523 on the other side of the rotating arm 52 can also push the rotating arm 52 to rotate around the rotating shaft 51, so that the first hook 54 and the second hook 21 are disengaged. The first reset elastic element 53 is used for automatic reset after the rotating arm 52 is pushed and rotated. After the rotating arm 52 is reset, the opened lens 2 can still be firmly locked together with the first hook 54 on the lens locking assembly 5.

[0033] To facilitate the installation of the lens locking assembly 5, prevent the pivot 51 in the locking assembly 5 from easily falling off, ensure that the locking switch button 523 in the locking assembly 5 automatically resets after being pressed, and facilitate the linkage between the chin guard switch push rod 6 and the locking assembly 5, the preferred embodiments of this utility model include, for example... Figure 3-6As shown, the mounting bracket 31 includes a pair of brackets 311 for supporting the rotating shaft 51 and a pair of limiting members 312 for limiting the rotating shaft 51. The pair of brackets 311 are disposed between the pair of limiting members 312. The guide bracket 32 ​​is disposed between the pair of brackets 311. The guide bracket 32 ​​is provided with a second groove 321 for the rotating shaft 51 to pass through. The rotating shaft 51 is mounted on the pair of brackets 311. The reset elastic member 53 is fitted on the rotating shaft 51, and one end of the reset elastic member 53 is pressed against the first groove 522, while the other end of the reset elastic member 53 is pressed against the inner side of the chin guard 3.

[0034] The mounting bracket 31 and the guide bracket 32 ​​can both be injection molded integrally with the chin guard. The mounting bracket 31, with its pair of brackets 311 supporting the rotating shaft 51 and its pair of limiting members 312 for positioning the rotating shaft 51, is arranged laterally inside the chin guard. The guide bracket 32 ​​can be a pair of brackets arranged symmetrically vertically. The pair of limiting members 312 restricts the axial movement of the rotating shaft 51, and the pair of guide brackets 32 limits the radial movement of the rotating shaft 51. The reset elastic member 53 is preferably a torsion spring, which can be fitted onto the rotating shaft 51. One end of the reset elastic member 53 is engaged in the second groove 321, and the other end presses against the inner surface of the chin guard 3. The reset elastic member 53 is used to reset the rotating arm 52 after it has been pushed or pressed and rotated.

[0035] To ensure that when the chin guard switch push rod 6 is operated, the latch between the chin guard 3 and the helmet shell 1 can be disengaged, and simultaneously the sliding groove 521 on the rotating arm 52 in the latch assembly 5 can be pushed in conjunction, forcing the rotating arm 52 to rotate around the pivot 51, thereby disengaging the first hook 54 from the second hook 21 on the lens 2, a further preferred embodiment of this utility model includes, for example... Figure 3-6 As shown in Figure 8, the chin shield switch push rod 6 has an inverted T-shaped structure. The upper part of the inverted T-shaped chin shield switch push rod 6 is provided with a push rod head 61 for cooperating with the slide groove 521, and a U-shaped through groove 62 is provided on the upper part of the push rod head 61. The push rod heads 61 located on both sides of the U-shaped through groove 62 are slidably engaged with the two sides of the guide bracket 32.

[0036] The push rod head 61 is designed with a U-shaped through groove 62, primarily to allow it to slide against the guide bracket 32 ​​located inside the chin shield. The guide bracket 32 ​​guides the sliding direction of the push rod head 61 of the chin shield switch push rod 6. The chin shield switch push rod 6 can also be made of injection molded material.

[0037] To facilitate clamping the inverted T-shaped chin guard switch push rod 6 between the clamping guide 7 and the inner surface of the chin guard 3, and to allow it to slide within the guide groove 71 on the clamping guide 7, while also enabling the slider hook 66 to hook the reset steel wire rope (not shown in the figure), a further preferred embodiment of this utility model includes, for example... Figure 8-10 As shown, the lower part of the inverted T-shaped chin guard switch push rod 6 has an outwardly protruding push-pull protrusion 63 on the side facing the inside of the chin guard 3. The lower part of the inverted T-shaped chin guard switch push rod 6 has an outwardly protruding frame 64 and a reinforcing rib 65 on the side facing the inside of the housing 1. An outwardly protruding hook-shaped slider 641 is provided on the frame 64. A slider hook 66 for hooking with the reset wire rope is provided in the middle part of the inverted T-shaped chin guard switch push rod 6 facing the inside of the housing 1. The slider hook 66 extends out of the guide groove 71 on the clamping guide member 7 and slides in cooperation with the guide groove 71.

[0038] The chin guard switch push rod 6 is made into an inverted T-shape to simplify its structural dimensions and facilitate its installation with the clamping guide 7, which can be injection molded. A protruding push-pull edge 63 is provided on the lower part of the chin guard switch push rod 6 facing the inner side of the chin guard 3, facilitating manual pushing and pulling. An outwardly protruding frame 64 and reinforcing rib 65 are provided on the lower part of the inverted T-shaped chin guard switch push rod 6 on the inner side of the housing 1 to reduce its weight, save injection molding material, and ensure sufficient strength. An outwardly protruding hook-shaped slider 641 is provided on the frame 64 to facilitate engagement with the first through groove 73 on the clamping guide 7. The slider hook 641 serves two purposes: firstly, it slides within the guide groove 71 on the clamping guide 7, and secondly, it hooks the steel wire rope (not shown) used for resetting.

[0039] To facilitate the installation of the inverted T-shaped chin guard switch push rod 6, and to guide its sliding within the chin guard 3, allowing it to smoothly move up and down, the chin guard switch push rod 6 disengages or locks the chin guard 3 from the housing 1, and also disengages the lens locking assembly 5 from the lens 2, a further preferred embodiment of this invention includes... Figure 8-10 As shown, the clamping guide 7 has a third groove 72 on the side facing the inner side of the chin guard 3 for cooperating with the frame 64 and the reinforcing rib 65. On both sides of the third groove 72, there are first through grooves 73 for sliding cooperation with the hook-shaped slider 641. At least three first through holes 74 for the first connector 8 to pass through are provided around the clamping guide 7. Reinforcing posts 75 are provided around the first through holes 74.

[0040] The third groove 72, on the side of the guide member 7 facing the inner side of the chin shield 3, is designed to mate with the frame 64 and reinforcing rib 65. It primarily accommodates the chin shield switch push rod 6, facilitating its connection to the inner side of the chin shield 3. The first through groove 73 engages with the hook-shaped slider 641 on the chin shield switch push rod 6, allowing the hook-shaped slider 641 to slide up and down within the first through groove 73. The first through hole 74 is a connecting hole through which the first connector 8 passes and connects to the connecting post on the mouth window member 4. The reinforcing post 75 is the reinforcing material surrounding the first through hole 74.

[0041] To facilitate the placement of the reset wire rope on the slider hook 66 and to guide the wire rope along the wire rope guide groove 76, thus preventing the wire rope from becoming uncontrollable, a further preferred embodiment of this utility model includes, for example... Figure 8-10 As shown, a reset wire rope is hung on the slider hook 66, and reset wire rope guide grooves 76 extending out of the sides of the clamping guide 7 are provided on both sides of the guide groove 71.

[0042] The main function of the reset wire rope guide groove 76 is to guide the reset wire rope to prevent it from interfering with the movement of other components after it loses its restraint, thus avoiding potential safety hazards.

[0043] In order to enable the reset wire rope to pull the second elastic element through the inverted T-shaped chin guard switch push rod 6, so that the chin guard 3 and the helmet shell 1 can be unlocked or locked together, a further preferred embodiment of this utility model includes, for example... Figure 3 As shown, a reset wire rope guide ring 9 and an unlocking assembly 10 of the chin shield 3 are also provided on the inner side of the chin shield 3 and connected to the inner side of the chin shield 3. The second elastic element (not shown in the figure) for resetting the reset wire rope is connected to the unlocking assembly 10.

[0044] The reset wire rope guide ring 9 is also used to guide the reset wire rope to prevent it from interfering with other components and causing safety hazards after it loses its restraint. The unlocking component 10 is mainly used as a locking and unlocking component for the rotating structure between the chin guard 3 and the shell 1. This component is not the technical problem to be solved by this utility model, so it will not be described further here.

[0045] To facilitate the control of the mouth vent 4 ventilation opening by the mouth vent switch 11 located between the mouth vent 4 and the chin guard 3, thereby controlling the air intake within the helmet shell 1 or switching between air intake and vent closure, a further preferred embodiment of this utility model includes... Figure 7, 12 As shown in Figure 13, a Y-shaped mouth window switch 11 is provided on the side of the mouth window component 4 facing the chin guard 3. A protrusion 111 is provided on the side of the Y-shaped mouth window switch 11 facing the outer surface of the chin guard 3. A fourth recess 112 is provided below the protrusion 111. The fourth recess 112 is used to slide with the mounting plate 12 that cooperates with the mouth window switch 11. A push-pull button 113 protruding outward is provided on the other side of the Y-shaped mouth window switch 11. A fourth through groove 121 is provided on the upper part of the mounting plate 12 for sliding with the protrusion 111. A connecting plate hook 44 is also provided on the side of the mouth window component 4 facing the chin guard 3 for engaging with the upper and lower ends of the mounting plate 12. The connecting plate hook 44 includes upper and lower hooks. A mounting plate lower hook 122 is provided at the lower end of the mounting plate 12 for engaging with the lower hook on the side of the mouth window component 4 facing the chin guard 3. The vent switch 11 can also be made of injection molding, forming a Y-shaped structure. This is primarily to mate with the air inlets located on both sides of the vent 4. The protrusion 111 and the fourth groove 112 are mainly for sliding engagement with the mounting plate 12, and also serve to guide and limit the vent switch 11. The fourth through groove 121 on the mounting plate 12 is a sliding groove for sliding engagement with the protrusion 111.

[0046] To facilitate the operation of the lens locking switch button 523 and the inverted T-shaped chin guard switch push rod pushing and pulling the protruding edge 63, to facilitate the connection of the mouth window component 4 and the clamping guide component 7, and to clamp the inverted T-shaped chin guard switch push rod 6 between the inner side of the chin guard 3 and the clamping guide component 7, and to clamp the Y-shaped mouth window component switch 11 and the connecting plate 12 between the mouth window 4 and the outer side of the chin guard 3, a further preferred embodiment of this utility model includes, for example... Figure 3-6As shown in Figures 11-13, the chin guard 3 and the mouth window 4 are respectively provided with a second through hole 33 and a third through hole 41 for the lens locking switch button 523 to pass through. The mouth window 4 is also provided with a fourth through hole 42 for the push-pull button 113 to pass through. The mouth window 4 has a connecting protrusion 43 for connecting with the connector 8 on the side facing the chin guard 3. The connecting protrusion 43 has an axial center blind hole 431. The chin guard 3 has a fifth through hole 34 for the connecting protrusion 43 to pass through. The mouth window 4 also has a connecting protrusion 8 on the side facing the chin guard 3 for connecting with the connector 8. The mounting plate 12 is connected to the upper and lower ends of the connecting plate hook 44. One side of the mounting plate 12 is slidably engaged with the Y-shaped mouth window component switch 11. The upper and lower ends of the mounting plate 12 are engaged with the upper and lower hooks provided on the inner side of the mouth window component 4. The connecting protrusion 43 of the mouth window component 4 facing the chin shield 3 passes through the fifth through hole 34 provided on the chin shield 3 and is connected to the first through hole 74 on the clamping guide 7 by the connecting member 8. The chin shield 3 and the mouth window component 4 are respectively provided with a sixth through hole 35 and a seventh through hole 45 for operating the chin shield switch push rod 6.

[0047] The second through hole 33 is located on the upper part of the chin guard 3, and the third through hole 41 is located on the upper part of the mouth window 4. Both the second through hole 33 and the third through hole 41 are through holes through which the lens locking switch button 523 passes. Their function is to allow the user to press the lens locking switch button 523, causing the first hook 54 and the second hook 21 to disengage and unlock, facilitating the opening and flipping of the lens 2. The fourth through hole 42 is located on the mouth window 4 and is through which the push-pull button 113 in the Y-shaped mouth window switch 11 passes. The push-pull button 113 is used to control the amount of air intake inside the helmet, or as a switch to turn the air intake on and off. The connecting protrusion 43 and the axial center blind hole 431 located on one side of the mouth window 4 are used to connect the mouth window 4 through the fifth through hole 34 on the chin guard 3 to the clamping guide 7. The upper and lower ends of the mounting plate 12 are snapped into the inner side of the mouth window component 4 and are provided with upper and lower hooks. Its function is to install the Y-shaped mouth window component switch 11 on the inner surface of the mouth window component 4.

[0048] In order to conceal the lens locking assembly 5, mounting bracket 31, guide bracket 32, inverted T-shaped chin guard switch push rod 6, and clamping guide 7 inside the chin guard 3, and to ensure that the pivot 51 in the locking assembly 5 does not fall off, the preferred embodiment of this utility model further includes, for example... Figure 3As shown, an inner protective plate 13 is also provided on the inner side of the chin shield 3. The inner protective plate 13 is connected to the inner side of the chin shield 3 through a connector 8. A limiting mating surface 131 for covering the rotating shaft 51 is provided on the inner protective plate 13.

[0049] The inner protective plate 13 can also be made of injection molding material. The main function of the inner protective plate 13 is to cover the latch assembly 5, the mounting bracket 31, the guide bracket 32, the inverted T-shaped chin guard switch push rod 6 and the clamping guide 7, and also to ensure that the pivot 51 in the latch assembly 5 will not fall off.

[0050] To facilitate the interaction between the edge of the lens 2 and the lens locking assembly 5 located inside the chin guard 3, enabling locking and unlocking of the lens 2, and to enhance the aesthetics of the lens 2's outer surface, the preferred embodiment of this invention further includes... Figure 2 , 3 As shown, the edge of the lens 2 is provided with a snap-fit ​​structure, including a second snap hook 21 that protrudes from the middle of the inner edge of the lens 2, and a protruding edge 22 is also provided on the outer side of the edge of the lens 2.

[0051] The second hook 21 is set on the inner edge of the lens 2 so that the snap-fit ​​structure is hidden inside the helmet shell, making its external structure simple and beautiful and not easily damaged. The protruding edge 22 on the outer edge of the lens 2 is to facilitate the pushing and pulling of the lens 2 and its rotation. The lens 2 can be made of transparent plastic by injection molding.

[0052] Some helmets have both an outer lens and an inner lens. The lens 2 described in this application is the outer lens of the helmet.

[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A linkage structure for a helmet lens latch and a chin guard switch, the helmet comprising a shell (1), a lens (2) and a chin guard (3) being provided on the face side of the shell (1), a mouth vent (4) being provided on the chin guard (3), the left and right sides of the lens (2) and the left and right sides of the chin guard (3) being hinged to the left and right sides of the shell (1) respectively, the shell (1) being a steel structure, and the lens (2) being made of a transparent material, characterized in that, A snap-fit ​​structure is provided on the edge of the lens (2). The inner side of the chin shield (3) is provided with a mounting bracket (31) and a guide bracket (32) for mounting the lens locking assembly (5). The lens locking assembly (5) is mounted on the mounting bracket (31) and the guide bracket (32). The inner side of the chin shield (3) is also provided with a chin shield switch push rod (6). One end of the chin shield switch push rod (6) is connected to the lens locking assembly (5) through a linkage structure. The inner side of the chin shield (3) is also provided with a clamping guide (7) for the chin shield switch push rod (6). The clamping guide (7) and the mouth window component (4) located on the outside of the chin shield (3) are connected to each other through the chin shield (3) via a first connector (8). The chin shield switch push rod (6) slides between the guide bracket (32) and the guide groove (71) provided on the clamping guide (7).

2. The linkage structure between the helmet visor latch and the chin guard switch according to claim 1, characterized in that, The lens locking assembly (5) includes a rotating shaft (51), on which a rotating arm (52) and a first reset elastic member (53) are provided. The end of the rotating arm (52) is provided with a first hook (54) for engaging with the snap-fit ​​structure provided on the lens (2). One side of the rotating arm (52) is provided with a sliding groove (521) for engaging with the upper end of the chin shield switch push rod (6), and a first groove (522) for the first reset elastic member (53) to press against it. The other side of the rotating arm (52) is provided with a lens locking switch button (523).

3. The linkage structure between the helmet visor latch and the chin guard switch according to claim 2, characterized in that, The mounting bracket (31) includes a pair of brackets (311) for supporting the rotating shaft (51) and a pair of limiting members (312) for limiting the rotating shaft (51). The pair of brackets (311) are disposed between the pair of limiting members (312). The guide bracket (32) is disposed between the pair of brackets (311). The guide bracket (32) is provided with a second groove (321) for the rotating shaft (51) to pass through. The rotating shaft (51) is mounted on the pair of brackets (311). The reset elastic member (53) is fitted on the rotating shaft (51). One end of the reset elastic member (53) is pressed against the first groove (522), and the other end of the reset elastic member (53) is pressed against the inside of the chin guard (3).

4. The linkage structure between the helmet visor latch and the chin guard switch according to claim 2, characterized in that, The chin shield switch push rod (6) has an inverted T-shaped structure. The upper part of the inverted T-shaped chin shield switch push rod (6) is provided with a push rod head (61) for cooperating with the slide groove (521). A U-shaped through groove (62) is provided on the upper part of the push rod head (61). The push rod heads (61) located on both sides of the U-shaped through groove (62) are slidably engaged with both sides of the guide bracket (32).

5. The linkage structure between the helmet visor latch and the chin guard switch according to claim 4, characterized in that, The lower part of the inverted T-shaped chin guard switch push rod (6) facing the inner side of the chin guard (3) is provided with an outwardly protruding push-pull protrusion (63). The lower part of the inverted T-shaped chin guard switch push rod (6) is provided with an outwardly protruding frame (64) and reinforcing rib (65) on the inner side of the housing (1). An outwardly protruding hook-shaped slider (641) is provided on the frame (64). A slider hook (66) for hooking with the reset wire rope is provided in the middle part of the inverted T-shaped chin guard switch push rod (6) facing the inner side of the housing (1). The slider hook (66) extends out of the guide groove (71) on the clamping guide (7) and slides in cooperation with the guide groove (71).

6. The linkage structure between the helmet visor latch and the chin guard switch according to claim 5, characterized in that, The clamping guide (7) has a third groove (72) on the side facing the inner side of the chin guard (3) for cooperating with the frame (64) and the reinforcing rib (65). On both sides of the third groove (72), there are first through slots (73) for sliding cooperation with the hook-shaped slider (641). At least three first through holes (74) for the first connector (8) to pass through are provided around the clamping guide (7). Reinforcing posts (75) are provided around the first through holes (74).

7. The linkage structure between the helmet visor latch and the chin guard switch according to claim 5, characterized in that, A reset wire rope is hung on the slider hook (66), and reset wire rope guide grooves (76) extending out of the sides of the clamping guide (7) are provided on both sides of the guide groove (71).

8. The linkage structure between the helmet visor latch and the chin guard switch according to claim 5, characterized in that, Inside the chin guard (3), there is also a reset wire rope guide ring (9) connected to the inside of the chin guard (3) and an unlocking component (10) of the chin guard (3). A second elastic element for resetting the reset wire rope is connected to the unlocking component (10).

9. The linkage structure between the helmet visor latch and the chin guard switch according to claim 5, characterized in that, A Y-shaped mouth window switch (11) is provided on the side of the mouth window component (4) facing the chin guard (3). A protrusion (111) is provided on the side of the Y-shaped mouth window switch (11) facing the outer surface of the chin guard (3). A fourth groove (112) is provided below the protrusion (111). The fourth groove (112) is used to slide with the mounting plate (12) that mates with the mouth window switch (11). An outwardly protruding push is provided on the other side of the Y-shaped mouth window switch (11). Pull button (113), the upper part of the mounting plate (12) is provided with a fourth through groove (121) for sliding cooperation with the protrusion (111), and the mouth window component (4) facing the chin guard (3) is also provided with a connecting plate hook (44) for engaging with the upper and lower ends of the mounting plate (12). The connecting plate hook (44) includes upper and lower hooks. The lower end of the mounting plate (12) is provided with a mounting plate lower hook (122) for cooperating with the lower hook on the side of the mouth window component (4) facing the chin guard (3).

10. The linkage structure between the helmet visor latch and the chin guard switch according to claim 9, characterized in that, The chin guard (3) and the mouth window (4) are respectively provided with a second through hole (33) and a third through hole (41) for the lens latch switch button (523) to pass through. The mouth window (4) is also provided with a fourth through hole (42) for the push-pull button (113) to pass through. The mouth window (4) facing the chin guard (3) is provided with a connecting protrusion (43) for connecting with the connector (8). The connecting protrusion (43) is provided with an axial center blind hole (431). The chin guard (3) is provided with a fifth through hole (34) for the connecting protrusion (43) to pass through. The mounting plate ( 12) One side is slidably engaged with the Y-shaped mouth window switch (11). The upper and lower ends of the mounting plate (12) are engaged with the upper and lower hooks provided on the inner side of the mouth window (4). The connecting protrusion (43) of the mouth window (4) facing the chin shield (3) passes through the fifth through hole (34) provided on the chin shield (3) and is connected to the first through hole (74) on the clamping guide (7) by a connector (8). The chin shield (3) and the mouth window (4) are respectively provided with a sixth through hole (35) and a seventh through hole (45) for the operation of the chin shield switch push rod (6).

11. The linkage structure between the helmet visor latch and the chin guard switch according to claim 2, characterized in that, An inner protective plate (13) is also provided on the inner side of the chin shield (3). The inner protective plate (13) is connected to the inner side of the chin shield (3) through a connector (8). A limiting mating surface (131) for covering the rotating shaft (51) is provided on the inner protective plate (13).

12. The linkage structure between the helmet visor latch and the chin guard switch according to claim 1, characterized in that, The edge of the lens (2) is provided with a snap-fit ​​structure, including a second snap hook (21) that protrudes in the middle of the inner edge of the lens (2), and a protruding edge (22) is also provided on the outer side of the edge of the lens (2).

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