Lens insertion structure of a helmet

Abstract

The utility model discloses a lens plug -pull structure of helmet, including the mounting seat of both sides of helmet shell, and the insert piece with the gap is equipped with in the both ends of lens, and the pivot is fixedly arranged in the side portion of mounting seat, and the multiple gear grooves are arranged in the circumferential direction of pivot close to the side of lens of mounting seat, and the gear post that is adapted with gear groove is equipped with in the inboard of lens. The utility model discloses through the cooperation of multiple gear grooves on pivot and lens gear post, makes the angle correction and positioning of lens in the process of inserting can be automatically completed, does not need artificial alignment, has the advantages such as simple operation, reliable connection, easy maintenance.

Description

Technical Field

[0001] This utility model relates to the field of helmet technology, specifically to a lens insertion and removal structure for a helmet. Background Technology

[0002] As a type of protective gear for cycling, helmets generally use a plug-in connection structure for the visor to enable quick replacement and maintenance. This type of structure typically consists of a guide groove on the visor frame, a buckle assembly, and a spring-loaded locking mechanism. Assembly is completed by sliding the visor along a preset track and triggering a locking action. However, the functionality of this structure is highly dependent on geometric matching; the visor must be inserted precisely in a predetermined direction for the buckle to engage accurately with the corresponding groove.

[0003] Chinese patent (CN214547617U) provides a fixing structure for a helmet visor, comprising a helmet body and a visor. The visor has insertion / removal portions at both ends, and a rotating component on the helmet body. The rotating component has a first opening on the side facing the visor and a pivot portion. The insertion / removal portions pass through the first opening and engage with the pivot portion. However, this technical solution uses a separate fixing component with a positioning groove. Since the rotating component must rotate synchronously with the visor, the visor's locking portion must be aligned with the opening of the rotating component during insertion / removal. This makes maintenance cumbersome and requires observation of the rotating component's position. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lens plug-in structure for a helmet.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows.

[0006] A helmet lens insertion and removal structure includes mounting seats located on both sides of the helmet shell and connected to the lens, with inserts provided at both ends of the lens. The structure is characterized in that: a rotating shaft is fixedly provided on the side of the mounting seat; the inserts are provided with notches adapted to the rotating shaft; the mounting seat is provided with multiple positioning grooves in the circumferential direction on the side of the rotating shaft near the lens; and a positioning post adapted to the positioning grooves is provided on the side of the lens near the helmet shell.

[0007] As a preferred technical solution, a limiting block is provided on the side of the mounting base away from the gear slot, and the limiting block is located inside the notch.

[0008] As a preferred technical solution, the rotating shaft is a cylindrical structure, and the end of the rotating shaft connected to the mounting base is provided with a hollow structure. The rotating shaft located in the hollow structure is constructed as an elastic thin wall, and the elastic thin wall is interference-fitted with the insert.

[0009] As a preferred technical solution, a cover plate is provided on the side of the mounting base away from the helmet shell. The cover plate is fixed to the mounting base by bolts passing through the inner side of the rotating shaft, and the cover plate abuts against the mounting base.

[0010] As a preferred technical solution, a sealing plate is also provided between the cover plate and the mounting base. The sealing plate is recessed in the middle and embedded in the rotating shaft. The sealing plate is provided with a connection hole adapted to the bolt.

[0011] As a preferred technical solution, the cover plate is provided with a rib and abutment post on the side near the helmet shell. The ribs are evenly distributed in a circumferential direction. The abutment post extends towards the sealing plate and is provided with a mating surface. The sealing plate has a recessed part in the middle that is adapted to the mating surface.

[0012] As a preferred technical solution, the end of the limiting block is provided with a spherical surface.

[0013] As a preferred technical solution, a decorative plate is also provided on the side of the cover plate away from the mounting base. The cover plate is provided with a slot on the outer periphery of the bolt. A card is provided on the decorative plate extending into the slot. The card is steppedly engaged with the slot and sandwiched between the cover plate and the sealing plate. Removing the decorative plate can expose the bolt.

[0014] As a preferred technical solution, the mounting base is provided with a guide slope adapted to the curvature of the lens, and the limiting block is at least partially exposed outside the plane where the guide slope is located.

[0015] The advantages and beneficial effects of this utility model are as follows: the precise engagement of the multi-level slots on the rotating shaft with the stop posts at the end of the lens allows the lens to automatically complete angle correction during insertion, eliminating the need for manual alignment of the rotating part opening. Within the arc range of the stop slots, the lens can be inserted arbitrarily within that arc range, solving the assembly difficulties caused by the high geometric matching accuracy requirements in traditional structures.

[0016] The interference fit between the limiting block and the elastic thin wall ensures stable guidance during the insertion and removal process. Elastic deformation compensates for lens manufacturing tolerances, effectively reducing the assembly failure rate. While simplifying maintenance, the decorative panel provides concealed protection for the internal structure, combining aesthetics and practicality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the lens of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the mounting base of this utility model;

[0020] Figure 4 This is a schematic diagram of the cover plate of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the sealing plate of this utility model;

[0022] Figure 6 This is a structural schematic diagram of the decorative panel of this utility model;

[0023] Figure 7 This is a schematic diagram of the combined structure of this utility model;

[0024] Figure label:

[0025] 1-Helmet shell, 2-Mounting base, 3-Insert plate, 4-Spindle, 5-Notch, 6-Gear slot, 7-Gear post, 8-Limiting block, 9-Hollow structure, 10-Elastic thin wall, 11-Cover plate, 12-Bolt, 13-Sealing plate, 14-Connecting hole, 15-Rib plate, 16-Abutting post, 17-Matching surface, 18-Matching opening, 19-Spherical surface, 20-Decorative plate, 21-Slot, 22-Card, 23-Guide slope. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0027] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly or implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] Please see Figures 1-7 This embodiment provides a helmet lens insertion and removal structure, including mounting seats 2 located on both sides of the helmet shell 1 and connected to the lens, with inserts 3 provided at both ends of the lens. To provide a reliable connection between the lens and the helmet shell and multi-position adjustment functionality, the technical solution provided in this embodiment includes a rotating shaft 4 fixedly mounted on the side of the mounting seat 2, and inserts 3 having notches 5 adapted to the rotating shaft 4. On the circumferential direction of the rotating shaft 4 near the lens, the mounting seat 2 has multiple position slots 6, with the axial direction of the position slots 6 corresponding to the radial direction of the rotating shaft. A position post 7 adapted to the position slot 6 is provided on the side of the lens near the helmet shell. The lens is inserted into the rotating shaft 4 through the notches 5 of the inserts 3, and the position post 7 can be engaged in different position slots 6 to achieve multi-position adjustment of the lens angle. During insertion and removal, the position post 7 slides along the surface of the rotating shaft 4 and automatically falls into the corresponding position slot 6, achieving adaptive positioning without visual alignment, significantly improving assembly convenience and user experience.

[0030] To limit lateral displacement of the lens during insertion and removal and enhance guiding stability, the technical solution provided in this embodiment includes a limiting block 8 disposed on the side of the mounting base 2 away from the stop groove 6, with the limiting block 8 located inside the notch 5. The limiting block 8, situated within the notch 5 of the insert 3, restricts the axial movement of the lens along the rotating shaft 4. During installation, the insert 3 is advanced along the guide path of the limiting block 8, preventing the lens from tilting or dislodging.

[0031] To provide an elastic interference fit between the insert and the shaft to compensate for manufacturing tolerances, the technical solution provided in this embodiment includes a cylindrical shaft 4 with a hollow structure 9 at the end where it connects to the mounting base 2. The shaft 4 located in the hollow structure 9 is configured as an elastic thin wall 10, which is in an interference fit with the insert 3. The elastic thin wall 10 undergoes elastic deformation when the insert 3 is inserted, providing a continuous clamping force. This design allows for dimensional deviations within a certain range, reducing the assembly failure rate.

[0032] To encapsulate the internal structure of the rotating shaft and provide overall rigid support, the technical solution provided in this embodiment includes a cover plate 11 disposed on the side of the mounting base 2 away from the helmet shell. The cover plate 11 is fixed to the mounting base 2 by bolts 12 passing through the inner side of the rotating shaft 4, and the cover plate 11 abuts against the mounting base 2. The bolts 12 pass through the rotating shaft 4 to tighten and fix the cover plate 11 and the mounting base 2. The cover plate 11 presses against the mounting base 2 to form a seal and support, preventing the rotating shaft 4 from loosening, while also facilitating disassembly and maintenance.

[0033] To further seal the interior of the shaft and provide a structural basis for bolted connections, the technical solution provided in this embodiment includes a sealing plate 13 disposed between the cover plate 11 and the mounting base 2. The sealing plate 13 is recessed in the middle and embedded in the shaft 4, and the sealing plate 13 is provided with a connecting hole 14 for the bolt 12. The sealing plate 13 is embedded inside the shaft 4, and its recessed structure accommodates the bolt head. The sealing plate 13 cooperates with the bolt 12 through the connecting hole 14, forming an internal seal and structural reinforcement, preventing dust intrusion and improving connection stability.

[0034] To enhance the structural strength of the cover plate and provide positioning and fit with the sealing plate, the technical solution provided in this embodiment includes a rib plate 15 and an abutment post 16 on the side of the cover plate 11 near the helmet shell. The rib plates 15 are evenly distributed circumferentially, and the abutment post 16 extends towards the sealing plate 13 with a mating surface 17. The sealing plate 13 has a recessed area in the middle with a mating opening 18 that matches the mating surface 17. The rib plates 15 enhance the bending stiffness of the cover plate 11, and the abutment post 16 is precisely positioned by inserting into the mating opening 18 of the sealing plate 13 through the mating surface 17, ensuring that the cover plate 11 and the sealing plate 13 are aligned, thus improving assembly accuracy and overall structural consistency.

[0035] To optimize the lens insertion and removal experience and provide visual guidance, the technical solution provided in this embodiment includes a mounting base 2 having a guide slope 23 adapted to the curvature of the lens, and a limiting block 8 being at least partially exposed outside the plane of the guide slope 23. The mounting base 2 is provided with a limiting block 8, and the end of the limiting block 8 is provided with a spherical surface 19.

[0036] To conceal internal fasteners and facilitate maintenance, this embodiment provides a decorative panel 20 on the side of the cover plate 11 away from the mounting base. A slot 21 is provided on the outer periphery of the bolt 12 on the cover plate 11. A clip 22 extends from the decorative panel 20 into the slot 21, and the clip 22 engages with the slot 21 in a stepped manner, clamping between the cover plate 11 and the sealing plate 13. Removing the decorative panel 20 exposes the bolt 12. The decorative panel 20 is secured by the clip 22 into the slot 21, covering the bolt 12 to maintain a clean appearance. When maintenance is required, removing the decorative panel 20 exposes the bolt 12, enabling quick disassembly and balancing aesthetics and practicality.

[0037] The working principle of this utility model is as follows: When installing the lens, the user pushes the inserts 3 on both sides of the lens along the guide slope 23 of the mounting base 2, the notch 5 fits into the rotating shaft 4, and the limiting block 8 is embedded inside the notch 5 to limit the lateral displacement; during the pushing process, the elastic thin wall 10 of the rotating shaft 4 undergoes elastic deformation, forming an interference fit with the inserts 3, compensating for manufacturing tolerances and providing guiding resistance; after the lens is in place, the stop post 7 on its inner side automatically engages in the corresponding stop groove 6, realizing multi-position positioning of the lens angle without manual alignment; when disassembling, the user directly pulls the lens outward, the elastic thin wall 10 rebounds to release the inserts 3, and the stop post 7 disengages from the stop groove 6, completing the separation; if it is necessary to maintain the internal structure, the decorative plate 20 can be opened to expose the bolts 12, and after loosening, the cover plate 11 and the sealing plate 13 can be removed to realize quick inspection and replacement of parts of the rotating shaft 4 and the mounting base 2.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A lens insertion / removal structure for a helmet, comprising mounting bases (2) located on both sides of a helmet shell (1) and connected to the lens, wherein inserts (3) are provided at the left and right ends of the lens, characterized in that: The mounting base (2) is fixedly provided with a rotating shaft (4) on its side, and the insert (3) is provided with a notch (5) adapted to the rotating shaft (4); the mounting base (2) is provided with a plurality of stop grooves (6) on the circumferential direction of the rotating shaft (4) near the lens, and the lens is provided with a stop post (7) adapted to the stop groove (6) on the side near the helmet shell.

2. The helmet lens insertion / removal structure according to claim 1, characterized in that: A limiting block (8) is provided on the side of the mounting base (2) away from the gear slot (6), and the limiting block (8) is located inside the notch (5).

3. The helmet lens insertion / removal structure according to claim 2, characterized in that: The rotating shaft (4) is a cylindrical structure. The end of the rotating shaft (4) connected to the mounting base (2) is provided with a hollow structure (9). The rotating shaft (4) located in the hollow structure (9) is constructed as an elastic thin wall (10). The elastic thin wall (10) is interference-fitted with the insert (3).

4. The helmet lens insertion / removal structure according to claim 3, characterized in that: A cover plate (11) is provided on the side of the mounting base (2) away from the helmet shell. The cover plate (11) is fixed to the mounting base (2) by bolts (12) passing through the inside of the rotating shaft (4). The cover plate (11) and the mounting base (2) abut against each other.

5. The helmet lens insertion / removal structure according to claim 4, characterized in that: A sealing plate (13) is also provided between the cover plate (11) and the mounting base (2). The sealing plate (13) is recessed in the middle and embedded in the rotating shaft (4). The sealing plate (13) is provided with a connecting hole (14) adapted to the bolt (12).

6. The helmet lens insertion / removal structure according to claim 5, characterized in that: The cover plate (11) is provided with a rib plate (15) and an abutment post (16) on the side near the helmet shell. The rib plate (15) is evenly distributed in the circumference. The abutment post (16) extends toward the sealing plate (13) and is provided with a fitting surface (17). The sealing plate (13) is recessed in the middle and is provided with a fitting opening (18) that matches the fitting surface (17).

7. The helmet lens insertion / removal structure according to claim 2, characterized in that: The end of the limiting block (8) is provided with a spherical surface (19).

8. The helmet lens insertion / removal structure according to claim 4, characterized in that: A decorative plate (20) is provided on the side of the cover plate (11) away from the mounting base. The cover plate (11) is provided with a slot (21) on the outer periphery of the bolt (12). The decorative plate (20) extends into the slot (21) and is provided with a card (22). The card (22) is steppedly engaged with the slot (21) and sandwiched between the cover plate (11) and the sealing plate (13). Removing the decorative plate (20) can expose the bolt (12).

9. The helmet lens insertion / removal structure according to claim 7, characterized in that: The mounting base (2) is provided with a guide slope (23) adapted to the curvature of the lens, and the limiting block (8) is at least partially exposed outside the plane where the guide slope (23) is located.

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