Magnetic connecting structure for air window of motorcycle helmet

Abstract

The invention discloses a magnetic connecting structure for an air window of a motorcycle helmet, and relates to the technical field of motorcycle helmets. The helmet comprises a helmet body, and an observation opening is formed in the helmet body. By adopting the design of the limiting plate, when the cylindrical groove accommodates the insertion column and the cylindrical groove accommodates the column body, the column body can adsorb the movable plate so as to drive the movable plate to rotate, and then the movable plate can drive the limiting plate to rotate so as to enable the limiting plate to abut against the abutting block, so that overturning of the movable plate is limited, and fixing of the limiting plate is achieved; when the goggles body and the helmet body need to be detached, the limiting plate can be driven to rotate through the movable plate by releasing the limitation of the limiting mechanism on the movable plate, so that the limiting plate is separated from the abutting block, the inserting column can be separated from the cylindrical groove, and the purpose of rapidly separating the goggles body from the helmet body is achieved; compared with the prior art, the detachable goggles have the advantage of being convenient to disassemble and assemble, and the damaged goggles body can be replaced conveniently.

Description

Technical Field

[0001] This application relates to the field of motorcycle helmet technology, specifically to a magnetic connection structure for the windshield of a motorcycle helmet. Background Technology

[0002] A helmet is a piece of equipment that provides high-performance protection for the head. When using vehicles such as motorcycles and electric vehicles, drivers usually wear safety helmets to improve safety and prevent injuries from accidents. Generally speaking, most motorcycle helmets on the market are full-coverage helmets with good protective performance.

[0003] The helmet vent specifically refers to the wind deflector used to open and close the helmet's observation port. Traditionally, the vent and helmet shell are connected by rivets or bolts. Rivets provide good fixation but cannot be disassembled, making vent replacement extremely inconvenient after damage. When bolts are used, the two ends of the vent are hinged to the helmet ends by bolt assemblies. Disassembling and assembling the vent requires tools to remove and install the bolts on both sides, making replacement inconvenient. To reasonably improve this problem, this application proposes a magnetic connection structure for a motorcycle helmet vent. Summary of the Invention

[0004] The purpose of this application is to address the technical problem that traditionally, helmet vents (specifically, the wind deflector used to open and close the helmet's observation port) are connected to the helmet shell using rivets or bolts. While rivet connections offer good fixation, they cannot be disassembled, making replacement extremely inconvenient after damage. When bolt connections are used, the two ends of the vent are hinged to the helmet via bolt assemblies, requiring tools to remove and install the bolts on both sides, further complicating replacement. This application provides a magnetic connection structure for motorcycle helmet vents.

[0005] To achieve the above objectives, this application specifically adopts the following technical solution:

[0006] A magnetic connection structure for a motorcycle helmet windshield includes:

[0007] The helmet body has an observation port, and cylindrical grooves are constructed along both sides of the observation port, with a column coaxially connected in the cylindrical groove;

[0008] The windproof goggle body has two insertion posts at both ends. The two insertion posts are respectively inserted into two cylindrical slots. The ends of the insertion posts are coaxially provided with cylindrical slots to accommodate the column. The periphery of the insertion posts is provided with multiple strip-shaped slots in a ring shape, all of which are connected to the cylindrical slots.

[0009] Multiple limiting plates are respectively hinged in multiple strip grooves. The inner wall of the column groove is provided with an annular groove. An abutment is inclinedly arranged in the annular groove. The end of the limiting plate is movably connected to the abutment. Each strip groove is hinged with a movable plate, the end of which is movably hinged to the end of the limiting plate. The end of the movable plate is magnetically connected to the column. The insertion column is provided with a limiting mechanism, which is used to restrict the flipping of the movable plate.

[0010] Furthermore, each of the strip grooves is constructed with a mounting plate, the limiting plate is hinged to the end of the mounting plate, the end of the movable plate is constructed with a waist hole, and the end of the limiting plate is constructed with a guide post, the guide post being slidably tangent to the waist hole.

[0011] Furthermore, the limiting mechanism includes an annular groove constructed on the periphery of the column, which has a notch. An inclined surface is constructed on one side of the notch. The end of the movable plate abuts against the inclined surface and has a locking block constructed on it, which abuts against the notch. Abutting plate is slidably fitted inside the insert post, the number of which is the same as the movable plate, and abuts against the inner side of the movable plate. A driving mechanism is provided on the insert post for driving multiple abutting plates to slide.

[0012] Furthermore, the driving mechanism includes a receiving groove, which is opened at the end of the insertion post and communicates with the cylindrical groove. A first cylindrical block is rotatably installed in the receiving groove, and a knob is connected to its end. A second cylindrical block is provided in the receiving groove and is connected to multiple abutments. A first inclined surface is constructed at the end of the first cylindrical block, and a second inclined surface is constructed on the second cylindrical block. A reset mechanism is provided in the receiving groove for driving the second cylindrical block to slide toward the first cylindrical block.

[0013] Furthermore, both the first and second cylindrical blocks are provided with grooves, and the two grooves penetrate the first inclined surface and the second inclined surface respectively.

[0014] Furthermore, the reset mechanism includes a circular plate installed on the inner wall of the receiving groove, a plurality of abutments sliding through the circular plate, and the circular plate being connected to the second cylindrical block by a compression spring.

[0015] Furthermore, the ends of the plurality of abutments are connected by a ring, and the ring abuts and overlaps with the plurality of movable plates.

[0016] Furthermore, the column is magnetically connected to the circular plate.

[0017] Furthermore, an annular block is rotatably mounted on the inner wall of the cylindrical groove, and the annular groove is formed on the inner side of the annular block.

[0018] Furthermore, the annular block is provided with baffles, the number of which is the same as that of the limiting plates, and they are distributed in a ring shape within the annular groove.

[0019] The beneficial effects of this application are as follows:

[0020] This application employs a limiting plate design. When the cylindrical groove accommodates the insert post and the cylindrical groove accommodates the post, the post can attract the movable plate, thereby driving the movable plate to rotate. Subsequently, the movable plate can drive the limiting plate to rotate, causing it to abut against the stop block, thus restricting the rotation of the movable plate and fixing the limiting plate. This allows for quick connection and fixation between the goggle body and the helmet body. When disassembly is required, by releasing the limiting mechanism from the movable plate, the movable plate can drive the limiting plate to rotate, separating it from the stop block and allowing the insert post to separate from the cylindrical groove, achieving the purpose of quickly separating the goggle body from the helmet body. Compared with existing technologies, this design has the advantage of easy disassembly and assembly, facilitating the replacement of damaged goggle bodies. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of this application;

[0022] Figure 2 This is a structural cross-sectional view of the helmet body of this application;

[0023] Figure 3 This application Figure 2 Enlarged view of point A;

[0024] Figure 4 This is a structural cross-sectional view of the windshield body of this application;

[0025] Figure 5 This application Figure 4 Enlarged view of point B;

[0026] Figure 6 This application Figure 4 The front view;

[0027] Figure 7 This application Figure 6 Enlarged view of point C;

[0028] Figure 8 This is a cross-sectional view of the three-dimensional structure from another angle;

[0029] Figure 9 This application Figure 8 Enlarged view of point D;

[0030] Figure 10 This application Figure 8 The front view;

[0031] Figure 11 This application Figure 10 Enlarged view of point E;

[0032] Reference numerals: 1. Helmet body; 2. Observation port; 3. Cylindrical groove; 4. Column; 5. Goggle body; 6. Insert post; 7. Cylindrical groove; 8. Strip groove; 9. Limiting plate; 10. Annular groove; 11. Abutment block; 12. Movable plate; 13. Limiting mechanism; 1301. Annular slot; 13011. Notch; 13012. Inclined surface; 1302. Block; 1303. Abutment plate; 14. Installation 15. Plate; 16. Waist hole; 17. Guide post; 18. Drive mechanism; 19. Receiving groove; 10. First cylindrical block; 11. Knob; 12. Second cylindrical block; 13. First inclined surface; 14. Second inclined surface; 15. Reset mechanism; 16. Circular plate; 17. Compression spring; 18. Groove; 19. Ring; 20. Circular ring; 21. Circular block; 22. Baffle; 23. Circular groove. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figures 1-11 As shown, one embodiment of this application discloses a magnetic connection structure for a motorcycle helmet windshield, comprising:

[0035] The helmet body 1 is an existing motorcycle helmet, which has an observation port 2. The observation port 2 is a face observation port 2. There are cylindrical grooves 3 on both sides of the observation port 2. These two sides are the two sides of the opposite end of the observation port 2, which are also the two sides of the helmet body 1. The two cylindrical grooves 3 extend relative to each other. A column 4 is coaxially connected inside the cylindrical groove 3. The outer diameter of the column 4 is smaller than the inner diameter of the cylindrical groove 3.

[0036] The goggle body 5, the existing helmet goggle is made of transparent or semi-transparent and tough material, and has two inserts 6 at both ends. The two inserts 6 extend relative to each other and are respectively inserted into two cylindrical slots 3. The ends of the inserts 6 are coaxially provided with cylindrical slots 7, which are used to accommodate the column 4. When the cylindrical slot 3 fully accommodates the insert 6, the column 4 can be inserted into the cylindrical slot 7. At this time, there is a gap between the arc-shaped side of the column 4 and the slot wall of the cylindrical slot 7. The insert 6 is provided with multiple strip slots 8 in a ring around its periphery. In this application, the number of strip slots 8 is preferably four. The strip slots 8 extend along the length direction of the insert 6 and their length is greater than the length of the cylindrical slot 7. They are all connected to the cylindrical slot 7.

[0037] Multiple limiting plates 9 are hinged to multiple strip grooves 8, with each limiting plate 9 corresponding to a strip groove 8. An annular groove 10 is provided on the inner wall of the cylindrical groove 3, close to the opening of the cylindrical groove 3. An inclined abutment 11 is provided within the annular groove 10, located on the side of the annular groove 10 close to the opening of the cylindrical groove 3. The ends of the limiting plates 9 movably overlap with the abutment 11. Movable plates 12 are hinged to each strip groove 8, their ends movably hinged to the ends of the limiting plates 9, and their ends magnetically connected to the column body 4. The column body 4 is made of magnet, and the movable plates 12 are made of stainless steel. A limiting mechanism 13 is provided on the insertion post 6 to restrict the rotation of the movable plates 12. Normally, the limiting plates 9 are completely contained within the strip grooves 8, and the movable plates 12 are parallel to the extending direction of the insertion post 6. When the cylindrical groove 3 completely contains the insertion post 6, and the column body 4 is inserted into the cylindrical groove 7, the column body 4... The movable plate 12 can be attracted, and at this time the movable plate 12 can rotate along its own hinge point, and drive the limiting plate 9 to rotate along its hinge point. At this time, the limiting plate 9 abuts against the abutment block 11, and there is an acute angle between the limiting plate 9 and the insertion post 6. Then the rotation of the movable plate 12 can be restricted by the limiting mechanism 13, thereby fixing the position of the limiting plate 9. When the insertion post 6 moves away from the cylindrical groove 3, the limiting plate 9 can abut against the abutment block 11. By adopting this design, the goggle body 5 and the helmet body 1 can be quickly connected and fixed during installation. When disassembly is required, the limitation of the limiting mechanism 13 on the movable plate 12 can be released, and the limiting plate 9 can be driven to rotate by the movable plate 12 to separate it from the abutment block 11, thereby separating the insertion post 6 from the cylindrical groove 3. Then the goggle body 5 and the helmet body 1 can be separated.

[0038] It should be specifically noted that when the goggle body 5 rotates along the axis of the insert 6 to open the observation port 2, the insert 6 can rotate in the cylindrical groove 3, the column 4 can rotate in the cylindrical groove 7, and the limiting plate 9 can move in the annular groove 10 and abut against the block 11.

[0039] This application employs a limiting plate 9 design. When the cylindrical groove 3 accommodates the insert 6 and the cylindrical groove 7 accommodates the column 4, the column 4 can attract the movable plate 12, thereby driving the movable plate 12 to rotate. Subsequently, the movable plate 12 can drive the limiting plate 9 to rotate, causing it to abut against the stop block 11, thereby restricting the rotation of the movable plate 12 and achieving the fixation of the limiting plate 9. This allows for the quick connection and fixation of the goggle body 5 and the helmet body 1. When disassembly is required, by releasing the limitation mechanism 13 on the movable plate 12, the movable plate 12 can drive the limiting plate 9 to rotate, causing it to separate from the stop block 11, allowing the insert 6 to separate from the cylindrical groove 3, thus achieving the purpose of quickly separating the goggle body 5 and the helmet body 1. Compared with the prior art, this design has the advantage of being easy to disassemble and assemble, and facilitates the replacement of damaged goggle bodies 5.

[0040] like Figures 2-11As shown, in some embodiments, each of the strip grooves 8 is constructed with a mounting plate 14. In this application, there are two mounting plates 14, which are spaced apart and extend along the length of the strip groove 8. A limiting plate 9 is hinged to the end of the mounting plate 14, located at the interval between the two mounting plates 14, and coaxially hinged to the two mounting plates 14. The end of the movable plate 12 is constructed with a waist hole 15, and the end of the limiting plate 9 is constructed with a guide post 16. The guide post 16 is slidably tangential to the waist hole 15. When the movable plate 12 rotates, it can force the guide post 16 to slide within the waist hole 15, thereby driving the limiting plate 9 to rotate. Figure 7 As shown, when the movable plate 12 rotates to a state parallel to the insertion post 6, under the cooperation of the guide post 16 and the waist hole 15, the end of the limiting plate 9 is located on the side of its hinge axis close to the end of the insertion post 6, and the end of the limiting plate 9 is located on the side of its hinge axis close to the end of the insertion post 6. At this time, the limiting plate 9 can be completely accommodated by the strip groove 8, as shown. Figure 11 As shown, after the movable plate 12 is attracted by the column 4, rotates along the hinge point and fits against it, the limiting plate 9 completes its rotation under the drive of the movable plate 12. The end of the limiting plate 9 is located on the side of its hinge axis away from the end of the insert column 6. At this time, the end of the limiting plate 9 extends out of the strip groove 8, enters the annular groove 10, and abuts against the abutment block 11.

[0041] like Figure 2 , Figure 3 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, in some embodiments, the limiting mechanism 13 includes an annular groove 1301 constructed around the periphery of the column 4, which has a notch 13011. The inner wall of the notch 13011 is perpendicular to the extending direction of the column 4. An inclined surface 13012 is constructed on one side of the notch 13011. The end of the movable plate 12 abuts against the inclined surface 13012, and a locking block 1302 is constructed on it, which abuts against the notch 13011. When the movable plate 12 is sucked by the column 4... Subsequently, the movable plate 12 can be placed on the inclined surface 13012. At this time, the locking block 1302 can be inserted into the recess 13011 and abut against the inner wall of the recess 13011 on the side away from the cylindrical groove 3, thereby fixing the insert 6. When the locking block 1302 is not disengaged from the recess 13011, the insert 6 cannot move in the direction away from the cylindrical groove 3. The insert 6 is slidably fitted with a stop plate 1303, and the sliding direction of the stop plate 1303 is the same as that of the insert. The length direction of the column 6 is parallel, and the number of the column 6 is the same as that of the movable plate 12. The abutment plate 1303 corresponds one-to-one with the movable plate 12 and abuts against the inner side of the movable plate 12. The inner side here specifically refers to the side of the movable plate 12 facing the axis of the column 6. When the column 6 rotates, the inner diameter of the ring formed by the multiple abutment plates 1303 is larger than the outer diameter of the column 4. The column 6 is provided with a driving mechanism 17, which is used to drive the multiple abutment plates 1303 to slide. When the locking block 1302 is inserted into the recess 13011, the multiple abutment plates 1303 can be driven to slide towards the cylindrical groove 3 by the driving mechanism 17. At this time, the abutment plate 1303 abuts against the inner side of the movable plate 12 and forces the movable plate 12 to rotate along the hinge point, so that the locking block 1302 on it is disengaged from the recess 13011. When the movable plate 12 rotates, the movable plate 12 separates from the abutment block 11 and disengages from the annular groove 10. At this time, the column 6 can disengage from the cylindrical groove 3.

[0042] like Figures 6-9As shown, in some embodiments, the drive mechanism 17 includes a receiving groove 1701, which is cylindrical and located at the end of the insert 6, communicating with the cylindrical groove 7. The receiving groove 1701 is coaxial with the cylindrical groove 7, and its inner diameter is smaller than that of the cylindrical groove 7. A first cylindrical block 1702 is rotatably mounted in the receiving groove 1701, and a knob 1703 is connected to its end. The first cylindrical block 1702 can be rotated by the knob 1703. A second cylindrical block 1704 is provided in the receiving groove 1701, which is connected to a plurality of abutments 1303. The second cylindrical block 1704 is slidably engaged with the receiving groove 1701. A first inclined surface 1705 is constructed at the end of the first cylindrical block 1702, and a second inclined surface 1706 is constructed on the second cylindrical block 1704. The first inclined surface 1705 and the second inclined surface 1706 are in contact. When closed, the abutment 1303 is in a retracted state and is not in contact with the movable plate 12. When the knob 1703 is turned, the first cylindrical block 1702 rotates. At this time, the first inclined surface 1705 and the second inclined surface 1706 are misaligned. The second cylindrical block 1704 can move away from the first cylindrical block 1702 under the contact of the first inclined surface 1705. At this time, the abutment 1303 is in an extended state and contacts the movable plate 12. The receiving groove 1701 is provided with a reset mechanism 18, which is used to drive the second cylindrical block 1704 to slide toward the first cylindrical block 1702. After the insertion post 6 is separated from the cylindrical groove 3, the knob 1703 can be turned to the initial position. Then, the reset mechanism 18 can be used to drive the second cylindrical block 1704 to move. At this time, the first inclined surface 1705 and the second inclined surface 1706 are in contact, and the abutment 1303 can be retracted.

[0043] like Figures 4-7 As shown, in some embodiments, both the first cylindrical block 1702 and the second cylindrical block 1704 are provided with grooves 19. The two grooves 19 extend along the length direction of the first cylindrical block 1702 and the second cylindrical block 1704, respectively, and the cross-section of the grooves 19 is cylindrical. The two grooves 19 penetrate the first inclined surface 1705 and the second inclined surface 1706, respectively. This allows for a reduction in the volume of the second cylindrical block 1704 and the first cylindrical block 1702 without affecting their functions, which helps to reduce production costs.

[0044] like Figures 4-9As shown, in some embodiments, the reset mechanism 18 includes a circular plate 1801 mounted on the inner wall of the receiving groove 1701. The circular plate 1801 is located at the communication point between the receiving groove 1701 and the cylindrical groove 7. A plurality of abutments 1303 slide through the circular plate 1801. After passing through the circular plate 1801, the abutments 1303 can enter the cylindrical groove 7. The circular plate 1801 and the second cylindrical block 1704 are connected by a compression spring 1802. The compression spring 1802 is used for... A thrust is provided to force the second cylindrical block 1704 away from the circular plate 1801. When the first inclined plane 1705 and the second inclined plane 1706 are misaligned, the second cylindrical block 1704 moves away from the first cylindrical block 1702. At this time, the compression spring 1802 can be pressed against it and compressed. Then, when the first inclined plane 1705 and the second inclined plane 1706 are in contact, the compression spring 1802 can push the second cylindrical block 1704 so that it is in contact with the first cylindrical block 1702.

[0045] like Figures 4-11 As shown, in some embodiments, the ends of multiple abutment plates 1303 are connected by a ring 20. The inner side of the ring 20 is larger than the outer diameter of the cylinder 4. The ring 20 can improve the connection strength of the multiple abutment plates 1303, making them less prone to bending and deformation. The ring 20 is disposed in the cylindrical groove 7 and abuts and overlaps with multiple movable plates 12. When the abutment plate 1303 slides, the ring 20 can drive the multiple movable plates 12 to move. The circular plate 1801 is provided with an annular groove 23 for accommodating the ring 20, thereby accommodating and protecting the ring 20.

[0046] like Figures 4-11 As shown, in some embodiments, the column 4 is magnetically connected to the circular plate 1801, which is an iron plate. When the column 4 is fully accommodated by the cylindrical groove 7, the end of the column 4 comes into contact with the circular plate 1801. At this time, the two achieve a magnetic connection, which can improve the connection stability between the insert 6 and the cylindrical groove 7, making it less likely to make abnormal noises due to shaking during use.

[0047] like Figure 2 , Figure 3 , Figure 10 and Figure 11 As shown, in some embodiments, an annular block 21 is rotatably installed on the inner wall of the cylindrical groove 3, and the annular groove 10 is opened on the inner side of the annular block 21. With this design, when the windshield body 5 is rotated to open the observation port 2, the insert 6 can rotate in the cylindrical groove 3. At this time, the limiting plate 9 is in the annular groove 10 and abuts against the abutment block 11. Under the action of the static friction force generated by the abutment, the annular block 21 can rotate with the rotation of the insert 6, so that the limiting plate 9 is not easily worn.

[0048] like Figure 2 , Figure 3 , Figure 10 and Figure 11As shown, in some embodiments, a baffle 22 is constructed on the annular block 21. The baffle 22 cuts off the diameter of the annular groove 10. The number of baffles 22 is the same as that of the limiting plates 9, and they are distributed in a ring shape in the annular groove 10. When the limiting plate 9 enters the receiving groove 1701, it can be inserted into the distance between adjacent baffles 22. When the insert 6 rotates, if the frictional force between the limiting plate 9 and the abutment 11 is less than the driving force when the annular block 21 rotates, the limiting plate 9 and the abutment 11 will slip. With this design, after the limiting plate 9 slips, the limiting plate 9 can contact the baffle 22, thereby driving the annular block 21 to rotate, which can effectively reduce the wear of the limiting plate 9.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic connection structure for a motorcycle helmet windshield, characterized in that, include: The helmet body (1) has an observation port (2) on it. Both sides of the observation port (2) are constructed with cylindrical grooves (3). A column (4) is coaxially connected in the cylindrical groove (3). The wind goggle body (5) has two inserts (6) at both ends. The two inserts (6) are respectively inserted into two cylindrical slots (3). The ends of the inserts (6) are coaxially provided with cylindrical slots (7) for accommodating the column (4). The inserts (6) are provided with multiple strip slots (8) in a ring around their periphery, all of which are connected to the cylindrical slots (7). Multiple limiting plates (9) are respectively hinged in multiple strip grooves (8). The inner wall of the column groove (3) is provided with an annular groove (10). An abutment (11) is inclinedly arranged in the annular groove (10). The end of the limiting plate (9) is movably connected to the abutment (11). Each strip groove (8) is hinged with a movable plate (12). Its end is movably hinged to the end of the limiting plate (9). Its end is magnetically connected to the column (4). The insert (6) is provided with a limiting mechanism (13), which is used to limit the flipping of the movable plate (12).

2. The magnetic connection structure for the motorcycle helmet windshield according to claim 1, characterized in that, Each of the strip grooves (8) is equipped with a mounting plate (14). The limiting plate (9) is hinged to the end of the mounting plate (14). The end of the movable plate (12) is equipped with a waist hole (15). The end of the limiting plate (9) is equipped with a guide post (16). The guide post (16) is slidably tangent to the waist hole (15).

3. The magnetic connection structure for the motorcycle helmet windshield according to claim 2, characterized in that, The limiting mechanism (13) includes an annular groove (1301) constructed on the periphery of the column (4), which has a notch (13011). An inclined surface (13012) is constructed on one side of the notch (13011). The end of the movable plate (12) abuts against the inclined surface (13012). A locking block (1302) is constructed on the movable plate (12). The locking block (1302) abuts against the notch (13011). A sliding abutment plate (1303) is slidably fitted inside the insert (6). The number of abutment plates (1303) is the same as that of the movable plate (12). The abutment plate (1303) abuts against the inner side of the movable plate (12). A driving mechanism (17) is provided on the insert (6) for driving multiple abutment plates (1303) to slide.

4. The magnetic connection structure for the motorcycle helmet windshield according to claim 3, characterized in that, The drive mechanism (17) includes a receiving groove (1701) which is opened at the end of the insert (6) and communicates with the cylindrical groove (7). A first cylindrical block (1702) is rotatably installed in the receiving groove (1701), and a knob (1703) is connected to its end. A second cylindrical block (1704) is provided in the receiving groove (1701) and is connected to a plurality of abutments (1303). A first inclined surface (1705) is constructed at the end of the first cylindrical block (1702), and a second inclined surface (1706) is constructed on the second cylindrical block (1704). A reset mechanism (18) is provided in the receiving groove (1701) for driving the second cylindrical block (1704) to slide toward the first cylindrical block (1702).

5. The magnetic connection structure for the motorcycle helmet windshield according to claim 4, characterized in that, The first cylindrical block (1702) and the second cylindrical block (1704) are both constructed with grooves (19), and the two grooves (19) respectively penetrate the first inclined surface (1705) and the second inclined surface (1706).

6. The magnetic connection structure for the motorcycle helmet windshield according to claim 4, characterized in that, The reset mechanism (18) includes a circular plate (1801) installed on the inner wall of the receiving groove (1701), a plurality of abutments (1303) sliding through the circular plate (1801), and the circular plate (1801) is connected to the second cylindrical block (1704) by a compression spring (1802).

7. The magnetic connection structure for the motorcycle helmet windshield according to claim 6, characterized in that, The ends of the plurality of abutments (1303) are connected by a ring (20), and the ring (20) abuts and overlaps with the plurality of movable plates (12).

8. The magnetic connection structure for the motorcycle helmet windshield according to claim 6, characterized in that, The column (4) is magnetically connected to the circular plate (1801).

9. The magnetic connection structure for the motorcycle helmet windshield according to claim 1, characterized in that, The inner wall of the cylindrical groove (3) is rotatably mounted with an annular block (21), and the annular groove (10) is opened on the inner side of the annular block (21).

10. The magnetic connection structure for the windshield of a motorcycle helmet according to claim 9, characterized in that, The annular block (21) is provided with baffles (22), which are the same number as the limiting plates (9) and are distributed in a ring shape in the annular groove (10).

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