A helmet lens opening and closing connecting structure

Abstract

The utility model discloses a safety helmet, and more particularly relates to a helmet lens open and close connecting structure, the helmet includes the casing, and the face one side of casing is provided with the lens and mouth air window spare, and the left and right sides of lens are hinged with the left and right sides of casing, and mouth air window spare is connected with casing, and the casing is rigid structure, and the lens is transparent body, and the edge of lens is equipped with the lock catch subassembly, and the outside of mouth air window spare is equipped with the clamping piece that cooperates with lock catch subassembly, and lock catch subassembly cooperates with clamping piece, and constitutes the open and close connecting structure between mouth air window spare and lens. The open and close connecting structure between mouth air window spare and lens is mainly used for helmet front lens to be lifted up to the upward, and the downward buckling lock, and the upward lifting of its lens and the downward buckling lock, and it can be completed only need to push lock catch subassembly simply. The helmet lens open and close connecting structure has simple structure, convenient to use, easy to operate, easy to process and manufacture, and relatively lower processing and manufacturing cost etc.

Description

Technical Field

[0001] This utility model relates to safety helmets, and more specifically to a helmet lens opening and closing connection structure with an integrated goggles or face shield. 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] Various forms of visor mounting have been previously proposed. DE 202006000930 U (VOSS HELME GMBH) 20 / 04 / 2006 describes a protective helmet comprising two helmet shells having a front and a rear portion that together form the shell, wherein the front portion covers a cavity immediately below it. The visor is slidably mounted relative to the cavity by means of a pair of arms extending from its upper edge, the arms engaging with a corresponding pair of crossbars. The visor can then be moved from its upper position (within the cavity) to its lower position (in front of the user) without the need for a pivot pin or any other moving parts.

[0006] EP 066029 A (SOCIETE DE NEGOCE ET D'ACAHTS DE MATERIAUX DE L'OUEST) 23 / 08 / 1995 discloses a helmet visor hinged to two side panels that slide on two opposing rails on the inner wall of the helmet. The lower end of each rail remains horizontal with respect to the lower edge of the helmet. Double-headed bolts on each panel engage in windows within the rails and automatically lock the panel in its usable position. The visor is removed by manually sliding the panel downwards. The visor is hinged to each panel via two links, with the upper link spring-loaded to the panel.

[0007] JP 2003082518 A (TANIZAWASEISAKUSHO LTD) disclosed on 19 / 03 / 2003 a helmet with a face shield in the helmet shell body. In this helmet, an arc-shaped guide portion is formed on the surface of the forehead portion of the helmet shell body to guide a sliding member disposed in the almost central portion of the face shield.

[0008] US 5283914 A (COAL INDUSTRY PATENTS LTD) 08 / 02 / 1994 discloses a protective helmet that includes a retractable face shield, a fan that provides filtered airflow to the face shield through ducts within the shell, and ear protectors substantially mounted within the shell's contours.

[0009] EP 0290293 A (HELMETS LTD) 09 / 11 / 1988 discloses a helmet, particularly an aviation helmet, having a rear and a front. The rear includes a shell shaped to extend partially above the wearer's head and to each side of the head. The front is shaped to mate with the rear to complete the helmet shell, and the front is detachably connected to the rear. The front is shaped to accommodate optical protection or enhancement equipment such as a face shield or night vision goggles. A single helmet may have two or more interchangeable fronts with different optical devices. The front can be connected to the rear via releasable buckles located on the top and sides of the helmet. The top buckle allows the front to pivot upwards so that the helmet can be put on and taken off without removing the front.

[0010] EP 2554067 A (OPTICOS SRL) 06 / 02 / 2013 discloses a safety helmet comprising an outer shell having a front opening and being connected to an inner shell constructed of shock-absorbing material. At least one anti-glare visor is constrained to the outer shell and is movable between at least one position engaged with and disengaged from the front opening. An operable portion of the anti-glare visor is integrally formed with the visor and controlled by a control slider via at least one motion transmission cable. This control slider is slidably connected to an associated guide fastened to the outer shell. The control slider can be manually moved between a stationary position and an active position. In the stationary position, the anti-glare visor is arranged in its disengaged position; in the active position, the anti-glare visor is arranged in at least one of the aforementioned engaged positions.

[0011] 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.

[0012] However, the helmet structures disclosed above, as well as the connection structure between the helmet and the visor, are relatively complex and suffer from problems such as difficulty in operation, inconvenience in use, and high manufacturing costs. Therefore, it is necessary to further improve the opening and closing structure of the helmet visor. Utility Model Content

[0013] The purpose of this invention is to overcome the defects in the existing technology and provide a helmet lens opening and closing connection structure that is simple in structure, convenient to use, easy to operate, easy to process and manufacture, and has a relatively low processing and manufacturing cost.

[0014] To achieve the above objectives, the technical solution of this utility model is to design a helmet visor opening and closing connection structure. The helmet includes a shell, with a visor and a mouth vent on the face side of the shell. The left and right sides of the visor are hinged to the left and right sides of the shell, and the mouth vent is connected to the shell. The shell is a rigid structure, and the visor is transparent. A locking assembly is provided on the edge of the visor, and a snap-fit ​​component is provided on the outer side of the mouth vent to cooperate with the locking assembly. The locking assembly and the snap-fit ​​component cooperate to form an opening and closing connection structure between the mouth vent and the visor. This opening and closing connection structure between the mouth vent and the visor is mainly used for lifting the visor upwards and locking it downwards. Lifting the visor upwards and locking it downwards can be accomplished simply by pushing the locking assembly.

[0015] To simplify the structure of the locking assembly and facilitate its installation on the lens, a preferred technical solution is that the locking assembly includes a switch component disposed on the outer side of the lens, a locking component disposed on the inner side of the lens, and an elastic component disposed between the switch component and the locking component. The lens has a first elongated through hole for the connection structure between the switch component and the locking component to pass through, and a second elongated through hole for installing the elastic component. The bottom of the second elongated through hole has a mounting seat for the elastic component, and the elastic component is mounted on the mounting seat.

[0016] The locking assembly is designed with a switch located on the outside of the visor and a locking element on the inside. This allows helmet users to easily control the hook on the inside of the visor to engage or disengage from the visor from the outside. This ensures a secure connection between the visor and the locking element while allowing for easy separation. A first elongated hole in the visor allows the connection structure between the switch and the locking element to pass through the visor and slide on it. A second elongated hole is for installing a spring-loaded element. The spring-loaded element ensures that when the hook engages the locking element, it remains engaged and will not disengage due to vibrations from the helmet shell or visor. The hook will only disengage when the user presses down on the switch, compressing the spring and simultaneously pulling the visor outward.

[0017] To facilitate the engagement of one side of the locking element with the latching element, while the other side is subjected to pressure from the elastic element, ensuring that the hook remains engaged with the latching element during normal helmet use and that it can also connect with the switch element, a further preferred technical solution is that the locking element has a hook on the side facing the latching element, and a raised mounting groove for the elastic element on the side facing the inner side of the lens. The upper part of the elastic element is embedded in the mounting groove. The locking element also has a first connecting hole, the position of which corresponds to the position of the first elongated through hole on the lens. The hook on the side of the locking element facing the latching element is used to engage with the latching element, the raised mounting groove for the elastic element on the side facing the inner side of the lens is used to mount the upper part of the elastic element, and the first connecting through hole on the locking element is used for connection between the locking element and the switch element via the first connecting element.

[0018] To facilitate the connection between the switch and the locking element, and to allow the switch to slide up and down within the first elongated through hole on the lens, a further preferred technical solution includes a protrusion on the side of the switch facing the lens, the protrusion corresponding to the position of the first elongated through hole. The protrusion has a second connecting hole, the position of which corresponds to the position of the first connecting hole on the locking element. The side of the switch facing the lens also has a groove adapted to the mounting groove of the protruding elastic element, and one side of the mounting groove on the locking element is inserted into the groove. The protrusion on the side of the switch facing the lens serves two purposes: firstly, it allows the switch to slide up and down within the first elongated through hole; secondly, it connects the switch to the locking element. The second connecting hole on the protrusion is the connecting hole for connecting the switch and the locking element. The groove on the side of the switch facing the lens is a groove for connecting with the mounting groove of the protruding elastic element on the inner side of the locking element facing the lens.

[0019] To facilitate the connection between the switch and the locking mechanism, a connector can be used to connect them. A further preferred embodiment involves a protrusion on the lens-facing side of the switch passing through a first elongated hole on the lens and a first connecting hole on the locking mechanism, connected by a first connector. This first connector passes through the first connecting hole on the locking mechanism and a second connecting hole on the protrusion, thus connecting the switch and the locking mechanism to the lens. The switch and locking mechanism can be connected through these installation steps.

[0020] To ensure a secure connection between the lens and the mouth window component while allowing for easy separation as needed, and to achieve a compact, aesthetically pleasing, and functionally diverse mouth window component, a preferred technical solution is that the mouth window component has a three-dimensional triangular shell structure. The front of the mouth window component with this three-dimensional triangular shell structure protrudes outwards from the center, forming a shell structure with at least four faces: an upper triangular face, a lower rectangular face, a left triangular face, and a right triangular face. The middle portions of the left and right triangular faces are recessed inwards, each forming two triangles. The upper part of the upper triangular face is the longer side, and the lower part is the shorter side of the lower rectangular face. A groove is provided on the upper triangular face for engaging with the locking assembly and the snap-fit ​​component. The mouthpiece is designed as a three-dimensional triangular shell structure to conform to ergonomics, mimicking the shape of the human mouth and nose. The front of the mouthpiece bulges outwards from the center to ensure the helmet's internal cavity accommodates the mouth and nose, preventing interference during opening and closing. The shell structure on its four sides is designed to minimize external volume without compromising the accommodating cavity or interfering with the mouth and nose, while also maintaining aesthetic appeal. The upper triangular face has its long side at the top and its lower rectangular face has its short side at the bottom. A groove is provided on the upper triangular face for engaging with the locking assembly and the snap-fit ​​component. This structure allows the locking assembly to be embedded within the mouthpiece, enhancing safety and reliability during helmet installation and use, while also improving the overall aesthetics.

[0021] To facilitate easy and convenient installation of the snap-fit ​​component on the helmet and ensure a tight fit with the hook component in the buckle assembly, a further preferred technical solution includes a third connecting hole on the upper triangular recess and a fourth connecting hole on the snap-fit ​​component. The size and position of the third and fourth connecting holes are compatible. The snap-fit ​​component is elongated, with its length slightly shorter than the length of the recess. The snap-fit ​​component is connected to the recess via a second connector passing through the fourth and third connecting holes. For ease of manufacturing, installation, use, adjustment, and maintenance / replacement, the snap-fit ​​component should be manufactured as a separate part, rather than being integrated with the mouthpiece / vent component.

[0022] To enable the hook in the latch assembly to move flexibly within the groove on the upper triangular surface, a further preferred technical solution is that a secondary groove or a third connecting hole is provided inwardly at the lower part of the latching member within the groove on the upper triangular surface. The secondary groove or third connecting hole is used to accommodate the hook of the latching member facing the latching member. The secondary groove or third connecting hole can be an integrally formed structure with the vent component.

[0023] To reduce the structural size of the lens and make the lens structure more delicate and compact, a further preferred technical solution is to provide a downwardly protruding tab in the middle of the lower part of the lens edge, the locking assembly is mounted on the downwardly protruding tab, and the first elongated through hole and the second elongated through hole are also provided on the downwardly protruding tab.

[0024] To facilitate the up-and-down sliding operation of the lens and to protect the switch, a further preferred technical solution includes outwardly protruding edges on the lower and side edges of the downwardly protruding tab. These edges surround the switch, and the upper part of the edges slopes from high to low. The tab at the lower edge of the lens is used to install the locking assembly. This structure also facilitates a good seal between the lower edge of the lens and the mouthpiece window, and the protruding edges prevent accidental operation of the switch.

[0025] To facilitate the operator's fingers in pushing and pulling the switch, a further preferred technical solution is that the lower and side edges of the outer surface of the switch are also provided with outwardly protruding edges. These protruding edges can be integrally formed with the switch.

[0026] For helmets that have both an inner and an outer lens, a preferred technical solution is that the lens is the outer lens of the helmet. Since the inner lens does not need to be secured with a buckle, while the outer lens serves as a safety protection lens, it must be equipped with a buckle assembly during use.

[0027] To facilitate the mounting of the mouth vent component onto the helmet shell, a preferred technical solution includes a mouth vent base between the mouth vent component and the shell. The mounting position of the mouth vent base corresponds to the mounting position of the snap-fit ​​component, and the mouth vent component has an outwardly recessed second groove at the mounting location of the mouth vent base. The function of the mouth vent base is to facilitate the indirect mounting of the mouth vent component onto the helmet shell.

[0028] The advantages and beneficial effects of this utility model are as follows: the helmet lens opening and closing connection structure is simple in structure, easy to operate, the lens can be opened and closed freely, the connection is firm when it is fastened, the lens opening operation is simple and easy to operate, and it is easy to process and manufacture with low manufacturing cost. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall helmet structure in the helmet lens opening and closing connection structure of this utility model; Figure 2 yes Figure 1 Exploded view of the middle lens and the mouth window component; Figure 3 yes Figure 2 Magnified view of the lens and mouth window components in the middle. Figure 1 ; Figure 4 yes Figure 3 Magnified view of the middle lens and locking assembly Figure 1 ; Figure 5 yes Figure 2 Magnified view of the lens and mouth window components in the middle. Figure 2 ; Figure 6 yes Figure 5 Magnified view of the middle lens and locking assembly Figure 2 ; Figure 7 yes Figure 1 Top view of the structure Figure 8 yes Figure 7 A schematic diagram of the AA cross-sectional structure; Figure 9 yes Figure 8 A magnified structural diagram of part B.

[0030] In the diagram: 1. Housing; 2. Lens; 21. First through hole; 22. First through hole; 221. Mounting base; 23. Protrusion; 231. Protruding edge; 3. Vent window component; 31. Upper triangular face; 311. Groove; 312. Third connecting hole; 32. Lower rectangular face; 33. Left triangular face; 34. Right triangular face; 4. Vent window base; 5. Locking assembly; 51. Switch component; 511. Protrusion; 512. Second connecting hole; 513. Groove; 52. Locking component; 521. Hook; 522. Mounting groove; 523. First connecting hole; 53. Elastic component; 6. Snap-fit ​​component; 61. Fourth connecting hole; 7. First connecting component; 8. Second connecting component. Detailed Implementation

[0031] 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.

[0032] according to Figures 1-3 As shown, this utility model is a helmet visor opening and closing connection structure. The helmet includes a shell 1, with a visor 2 and a mouth vent 3 located on the face side of the shell 1. The left and right sides of the visor 2 are hinged to the left and right sides of the shell 1, and the mouth vent 3 is connected to the shell 1. The shell 1 is a rigid structure, and the visor 2 is transparent. A locking assembly 5 is provided on the edge of the visor 2, and a snap-fit ​​member 6 is provided on the outer side of the mouth vent 3 to cooperate with the locking assembly 5. The locking assembly 5 and the snap-fit ​​member 6 cooperate to form an opening and closing connection structure between the mouth vent 3 and the visor 2. This opening and closing connection structure between the mouth vent 3 and the visor 2 is mainly used for lifting the visor 2 upwards and locking it downwards. Lifting the visor 2 upwards and locking it downwards can be completed simply by pushing the switch member 51 in the locking assembly 5. The mouth vent 3, the visor 2, and the locking assembly 5 can all be made of plastic injection molded parts.

[0033] To simplify the structure of the locking assembly 5 and facilitate its installation on the lens 2, a preferred embodiment includes a locking assembly 5 comprising a switch 51 disposed on the outer side of the lens 2, a locking member 52 disposed on the inner side of the lens 2, and an elastic member 53 disposed between the switch 51 and the locking member 52. The lens 2 has a first elongated through hole 21 through which the connecting structure between the switch 51 and the locking member 52 passes, and a second elongated through hole 22 for mounting the elastic member 53. The bottom of the second elongated through hole 22 has a mounting seat 221 for the elastic member 53, and the elastic member 53 is mounted on the mounting seat 221.

[0034] The locking assembly 5 is configured with a switch 51 located on the outside of the lens 2 and a locking member 52 located on the inside of the lens 2. This allows the helmet user to control the push and pull of the hook 521 located on the inside of the lens 2 to engage or disengage from the latching member 6 from the outside of the lens 2. This ensures that the lens 2 and the latching member 6 can be securely engaged together and easily disengaged. The first elongated through hole 21 on the lens 2 allows the connecting structure between the switch 51 and the locking member 52 to pass through the lens 2 and allows the switch 51 and the locking member 52 to slide on the lens 2. The second elongated through hole 22 is provided for installing the elastic member 53. The elastic element 53 is designed to ensure that when the hook 521 engages with the latching element 6, the hook 521 remains engaged and will not disengage due to vibrations of the helmet shell 1 or the lens 2. The hook 521 will only disengage from the latching element 6 when the operator presses down on the switch 51, compressing the elastic element 53 and simultaneously pulling the lens 2 outward. In this embodiment, the elastic element 53 can preferably be a spring, and the switch 51 and the locking element 52 can preferably be integrally molded parts.

[0035] To facilitate the engagement of one side of the locking member 52 with the snap-fit ​​member 6, while the other side is subjected to the pressure of the elastic member 53, ensuring that the hook always engages with the snap-fit ​​member 6 during normal helmet use, and also to connect with the switch member 51, a further preferred embodiment of this invention provides a snap-fit ​​hook 521 on the side of the locking member 52 facing the snap-fit ​​member 6, and a mounting groove 522 for the protruding elastic member 53 on the side of the locking member 52 facing the inner side of the lens, with the upper part of the elastic member 53 embedded in the mounting groove 522. The locking member 52 also provides a first connecting hole 523, the position of which corresponds to the position of the first elongated through hole 21 on the lens 2. The latch 521 on the side of the locking member 52 facing the latching member 6 is used to engage with the latching member 6. The mounting groove 522 of the elastic member 53 protruding on the side of the locking member 52 facing the inner side of the lens 2 is used to install on the upper part of the elastic member 53. The first connecting through hole 21 on the locking member 52 is used for the connection between the locking member 52 and the switch member 51 through the first connecting member 7.

[0036] To facilitate the connection between the switch 51 and the locking element 52, and to facilitate the sliding of the switch 51 within the first elongated through hole 21 on the lens 2, a further preferred embodiment of this invention includes a protrusion 511 on the side of the switch 51 facing the lens 2, the position of which corresponds to the position of the first elongated through hole 21. A second connecting hole 512 is provided on the protrusion 511, the position of which corresponds to the position of the first connecting hole 523 on the locking element 52. The side of the switch 51 facing the lens 2 also has a groove 513 that matches the position of the mounting groove 522 of the protruding elastic element 53, and one side of the mounting groove 522 on the locking element 52 is inserted into the groove 513. The switch 51 has a protrusion 511 on the side facing the lens 2. On the one hand, it is suitable for the switch 51 to slide up and down in the first elongated through hole 22. On the other hand, it is used to connect with the locking member 52. The second connecting hole 512 on the protrusion 511 is the connecting hole for connecting the switch 51 and the locking member 52. The groove 513 on the side of the switch 51 facing the lens 2 is a groove for connecting with the mounting groove 522 of the elastic member 53 with a protrusion on the inner side of the locking member 52 facing the lens 2.

[0037] To facilitate the connection of the switch 51 and the locking element 52, the first connector 7 can be used to connect the switch 51 and the locking element 52 together. In a further preferred embodiment, the protrusion 511 on the side of the switch 51 facing the lens 2 passes through the first elongated hole 21 on the lens 2 and the first connecting hole 523 on the locking element 52, and is connected by the first connector 7. The first connector 7 passes through the first connecting hole 523 on the locking element 52 and the second connecting hole 512 on the protrusion 511, thus connecting the switch 51 and the locking element 52 to the lens 2. The switch 51 and the locking element 52 can be connected together through the above installation steps.

[0038] To ensure a secure connection between the lens 2 and the mouth window component 3, while also allowing for easy separation as needed, and to achieve a compact, aesthetically pleasing, and functionally diverse structure for the mouth window component 3, a preferred embodiment of this invention further includes a three-dimensional triangular shell structure for the mouth window component 3. The front of the mouth window component 3 protrudes outward from the center, forming a shell structure with at least four faces: an upper triangular face 31, a lower rectangular face 32, a left triangular face 33, and a right triangular face 34. The middle portions of the left triangular face 33 and the right triangular face 34 are recessed inward, each forming two triangles. The upper part of the upper triangular face 31 is the longer side, and the lower part is the shorter side of the lower rectangular face 32. A groove 311 is provided on the upper triangular face 31 for engaging with the locking assembly 5 and the snap-fit ​​component 6. The mouth vent component 3 is designed as a three-dimensional triangular shell structure to conform to ergonomics, resembling the shape of the human mouth and nose. The front of the mouth vent component 3 protrudes outwards from the center to ensure the helmet's internal cavity has a space to accommodate the mouth and nose, preventing interference during opening and closing. The shell structure on its four sides is designed to minimize external dimensions without compromising the space for the mouth and nose or causing interference, while also meeting aesthetic requirements. The upper triangular face 31 has a long side at the top and a short side at the bottom, as described by the lower rectangular face 32. A groove 311 is provided on the upper triangular face 31 for engaging with the locking assembly 52 and the snap-fit ​​component 6. This structure allows the locking assembly 5 to be embedded inside the mouth vent component 3, making the locking assembly 5 safer and more reliable during the overall helmet installation and use, while also improving the overall aesthetics.

[0039] To facilitate easy and convenient installation of the snap-fit ​​component 6 on the helmet and ensure a tight fit with the hook 521 in the locking assembly 52, a further preferred embodiment in this case includes a third connecting hole 312 on the upper side of the groove 311 of the upper triangular face 31, and a fourth connecting hole 61 on the snap-fit ​​component 6. The size and position of the third connecting hole 312 are adapted to the fourth connecting hole 61. The snap-fit ​​component 6 is elongated, and its length is slightly shorter than the length of the groove 311. The snap-fit ​​component 6 is connected to the groove 311 via a second connector 8 passing through the fourth connecting hole 61 and the third connecting hole 312. For ease of manufacturing, installation, use, adjustment, and maintenance, the snap-fit ​​component 6 is manufactured as a separate part, rather than being integrated with the mouthpiece vent component 3. The elongated snap-fit ​​component 6 can be a one-piece injection-molded part.

[0040] To enable the hook 521 in the locking assembly 5 to move flexibly within the groove on the upper triangular face 31, a further preferred embodiment of this invention provides a secondary groove or a third connecting hole 312 extending further inward within the groove 311 of the upper triangular face 31, located at the lower part of the latching member 6. The secondary groove or third connecting hole 312 is used to accommodate the hook 521 of the locking member 52 facing the latching member 6. The secondary groove or third connecting hole 312 can be an integrally formed structure with the mouthpiece / ventilation member 3.

[0041] In order to reduce the structural size of the lens 2 and make the lens structure more delicate and compact, a further preferred embodiment of this embodiment also includes a downwardly protruding tab 23 provided in the middle of the lower edge of the lens 2. The locking assembly 5 is installed on the downwardly protruding tab 23, and the first elongated through hole 21 and the second elongated through hole 22 are also provided on the downwardly protruding tab 23. The tab 23 can be made into an integral injection molded part with the lens 2.

[0042] To facilitate the up-and-down pushing and pulling operation of the lens 2 and to protect the switch 51, a further preferred embodiment of this invention includes outwardly protruding edges 231 on the lower and side edges of the downwardly protruding tab 23. These edges 231 surround the switch 51, and their upper parts slope downwards. The tab 23 on the lower edge of the lens 2 is used to install the locking assembly 5. This structure also facilitates a good seal between the lower edge of the lens 2 and the mouthpiece window 3. The protruding edges 231 prevent accidental contact and misoperation of the switch 51.

[0043] To facilitate the operator's finger pushing and pulling of the switch 51, a further preferred embodiment of this invention also includes outwardly protruding edges 231 on the lower and side edges of the outer side of the switch 51. These protruding edges 231 can be integrally formed with the switch 51.

[0044] For a helmet that has both an inner lens and an outer lens 2, a preferred embodiment of this invention further includes a lens 2 being the outer lens of the helmet. Since the inner lens does not need to be secured with a buckle, while the outer lens 2 serves as a safety protection lens 2, it must be equipped with a buckle assembly during use.

[0045] To facilitate the installation of the mouth vent component 3 onto the helmet shell 1, a preferred embodiment of this invention further includes a mouth vent base 4 between the mouth vent component 3 and the shell 1. The installation position of the mouth vent base 4 corresponds to the installation position of the snap-fit ​​component 6, and the mouth vent component 3 has an outwardly recessed second groove at the installation location of the mouth vent base 4. The function of the mouth vent base 4 is to serve as an indirect mounting component to facilitate the installation of the mouth vent component 3 onto the helmet shell 1.

[0046] 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 helmet lens opening and closing connection structure, the helmet comprising a shell (1), a lens (2) and a mouth vent (3) being provided on the face side of the shell (1), the left and right sides of the lens (2) being hinged to the left and right sides of the shell (1), the mouth vent (3) being connected to the shell (1), the shell (1) being a rigid structure, and the lens (2) being a transparent body, characterized in that, A locking assembly (5) is provided on the edge of the lens (2), and a snap-fit ​​part (6) is provided on the outer side of the mouth window (3) to cooperate with the locking assembly (5). The locking assembly (5) and the snap-fit ​​part (6) cooperate to form an opening and closing connection structure between the mouth window (3) and the lens (2).

2. The helmet visor opening and closing connection structure according to claim 1, characterized in that, The locking assembly (5) includes a switch (51) disposed on the outside of the lens (2), a locking member (52) disposed on the inside of the lens (2), and an elastic member (53) disposed between the switch (51) and the locking member (52). The lens (2) is provided with a first elongated through hole (21) through which the connecting structure between the switch (51) and the locking member (52) passes, and a second elongated through hole (22) for mounting the elastic member (53). The bottom of the second elongated through hole (22) is provided with a mounting seat (221) for the elastic member (53), and the elastic member (53) is mounted on the mounting seat (221) for the elastic member (53).

3. The helmet visor opening and closing connection structure according to claim 2, characterized in that, The locking member (52) has a hook (521) on the side facing the snap fastener (6), and the locking member (52) has a mounting groove (522) for a protruding elastic member (53) on the side facing the inside of the lens. The upper part of the elastic member (53) is embedded in the mounting groove (522). The locking member (52) also has a first connecting hole (523), and the position of the first connecting hole (523) corresponds to the position of the first long through hole (21) on the lens (2).

4. The helmet visor opening and closing connection structure according to claim 3, characterized in that, The switch (51) has a protrusion (511) on the side facing the lens (2), the position of the protrusion (511) corresponds to the position of the first through hole (21), the protrusion (511) has a second connecting hole (512), the position of the second connecting hole (512) corresponds to the position of the first connecting hole (523) on the latch (52), the switch (51) also has a groove (513) on the side facing the lens (2) that matches the position of the mounting groove (522) of the protruding elastic element (53), and one side of the mounting groove (522) on the latch (52) is inserted into the groove (513).

5. The helmet visor opening and closing connection structure according to claim 3 or 4, characterized in that, The protrusion (511) on the side of the switch (51) facing the lens (2) passes through the first through hole (21) on the lens (2) and the first connecting hole (523) on the locking member (52), and is connected by the first connecting member (7). The first connecting member (7) passes through the first connecting hole (523) on the locking member (52) and the second connecting hole (512) on the protrusion (511), connecting the switch (51) and the locking member (52) to the lens (2).

6. The helmet visor opening and closing connection structure according to claim 1, characterized in that, The mouth window component (3) has a three-dimensional triangular shell structure. The mouth window component (3) with a three-dimensional triangular shell structure protrudes outward from the middle in front, so that it forms a shell structure with at least four sides, namely, an upper triangular surface (31), a lower rectangular surface (32), a left triangular surface (33), and a right triangular surface (34). The middle parts of the left triangular surface (33) and the right triangular surface (34) are recessed inward to form two triangles respectively. The upper part of the upper triangular surface (31) is the long side, and the lower part is the short side of the lower rectangular surface (32). The upper triangular surface (31) is provided with a groove (311) for cooperating with the locking assembly (5) and the snap-fit ​​component (6).

7. The helmet visor opening and closing connection structure according to claim 6, characterized in that, A third connecting hole (312) is provided on the upper side of the groove (311) of the upper triangular face (31), and a fourth connecting hole (61) is provided on the snap-fit ​​(6). The size and position of the third connecting hole (312) and the fourth connecting hole (61) are adapted to each other. The snap-fit ​​(6) is long and the length of the long snap-fit ​​(6) is slightly shorter than the length of the groove (311). The snap-fit ​​(6) is connected to the groove (311) by the second connecting member (8) passing through the fourth connecting hole (61) and the third connecting hole (312).

8. The helmet visor opening and closing connection structure according to claim 7, characterized in that, In the groove (311) of the upper triangular face (31), a secondary groove or a third connecting hole (312) extending further inward is provided at the lower part of the snap fastener (6). The secondary groove or the third connecting hole (312) is used to accommodate the hook (521) of the latch (52) facing the snap fastener (6).

9. The helmet visor opening and closing connection structure according to claim 2, characterized in that, A downward protruding tab (23) is provided in the middle of the lower edge of the lens (2), the locking assembly (5) is installed on the downward protruding tab (23), and the first long through hole (21) and the second long through hole (22) are also provided on the downward protruding tab (23).

10. The helmet visor opening and closing connection structure according to claim 9, characterized in that, The downwardly protruding tab (23) has outwardly protruding edges (231) on its lower and side sides, and the protruding edges (231) surround the switch (51). Furthermore, the upper part of the convex edge (231) is inclined from high to low.

11. The helmet visor opening and closing connection structure according to claim 10, characterized in that, The lower and side sides of the outer surface of the switch (51) are also provided with outward protruding edges (231).

12. The helmet visor opening and closing connection structure according to claim 1, characterized in that, The lens (2) is the outer lens of the helmet.

13. The helmet visor opening and closing connection structure according to claim 1, characterized in that, There is also a mouth window base (4) between the mouth window component (3) and the housing (1). The installation position of the mouth window base (4) corresponds to the installation position of the snap-fit ​​component (6), and the mouth window component (3) has an outwardly recessed second groove at the installation position of the mouth window base (4).

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