Motion mechanism for manipulating a lens and a visor and a helmet

Abstract

The application discloses a movement mechanism for operating a lens and a chin guard and a helmet, wherein the movement mechanism for operating the lens and the chin guard comprises a support, a first movement unit arranged on the support, the first movement unit being arranged to enable the lens to rotate relative to the support, and a first protrusion and a first recess matched with each other; wherein the first protrusion is a triangular protrusion which is fixedly arranged relative to the support, the first recess is a square recess which is fixedly arranged relative to the chin guard, and the first protrusion and the first recess are arranged such that the first recess and the chin guard can drive the lens to rotate relative to the support while the first recess rotates relative to the first protrusion. Thus, the instantaneous rotation center of the chin guard in the rotation process is not a fixed shaft, which enables the chin guard to move forward and / or upward during the rotation relative to the support, so that a gap is formed between the lens and the chin guard during the rotation of the chin guard relative to the support, and the frictional resistance between the lens and the chin guard is reduced.

Description

Technical Field

[0001] This invention relates to the field of daily necessities technology, specifically to a motion mechanism for controlling lenses and a chin guard, and a helmet. Background Technology

[0002] Helmets, as essential safety equipment for protecting the head, are widely used in high-risk scenarios such as motorcycle riding, racing, and industrial operations. Based on their structural design, helmets are mainly divided into two categories: full-face helmets and half-face helmets. Full-face helmets feature a chin guard that surrounds the wearer's chin, providing all-around head protection and excellent safety performance. Half-face helmets, on the other hand, eliminate the need for a chin guard, allowing wearers to drink, talk, and perform other tasks without removing the helmet during breaks, offering significant convenience.

[0003] To balance the safety and protection of full-face helmets with the ease of use of half-face helmets, and to meet both the needs of comfort and safety, current technologies generally design helmets with a variable chin guard structure. The core feature of this type of helmet is that its chin guard can switch between at least two positions depending on riding conditions or user needs: one is the full-face helmet position, in which the helmet's overall shape is a full-face helmet; the other is the half-face helmet position, in which the chin guard extends across the top of the helmet and is ultimately positioned at the rear of the helmet, giving the helmet a half-face helmet appearance. This allows for flexible switching between the two usage modes.

[0004] Currently, the mainstream structural solution for deformable helmets that achieve the above switching function is to set the chin guard and the goggles to be coaxially rotatably connected, and to make the rotation radius of the chin guard greater than that of the goggles. This allows the chin guard to pass over the goggles and rotate to the rear of the helmet during the flipping process, thus completing the mode conversion from a full-face helmet to a half-face helmet.

[0005] However, the aforementioned structure reveals several significant shortcomings in practical applications. When the user rotates the chin guard upwards to switch to a half-helmet position, the chin guard and visor are spatially adjacent with minimal gap. The rotation of the chin guard directly causes the visor to rotate unintentionally, resulting in significant frictional resistance and a noticeably stiff operating feel. The user must exert considerable force to complete the switch, severely impacting ease of use. Furthermore, the continuous close contact and relative movement between the chin guard and visor accelerates wear and deterioration of their contact surfaces, thus shortening the overall lifespan of the product. Even worse, due to rotational interference, the chin guard cannot achieve a tight and stable seal with the visor when closed to a full-helmet position. The large gap at the joint allows dust, sand, and other foreign objects from the external environment to easily penetrate the helmet during riding, posing a potential threat to the wearer's eyes and face, and presenting a significant safety hazard.

[0006] Therefore, providing a motion mechanism that enables the jaw protector to smoothly drive the lens movement during mode switching and effectively avoids interference between the two has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] To address at least one of the aforementioned problems, according to one aspect of the present invention, a motion mechanism for manipulating a lens and a jaw guard is provided.

[0008] The motion mechanism for manipulating the lens and the jaw guard includes a bracket; a first motion unit disposed on the bracket, the first motion unit being configured to enable the lens to rotate relative to the bracket; and a first protrusion and a first groove that are adapted to each other; wherein the first protrusion is a triangular protrusion and is fixedly disposed relative to the bracket; the first groove is a square groove and is fixedly disposed relative to the jaw guard; the first protrusion and the first groove are configured such that when the first groove and the jaw guard rotate relative to the first protrusion, they can drive the lens to rotate relative to the bracket.

[0009] Since the rotation of the chin guard relative to the support is limited by the rotation of the square groove relative to the triangular protrusion, the instantaneous rotation center of the chin guard during the rotation process is not a fixed axis. This causes the chin guard to move forward and / or upward during the rotation relative to the support, thereby creating a gap between the chin guard and the lens during the rotation relative to the support, thus reducing the frictional resistance between the chin guard and the lens.

[0010] In some embodiments, the first protrusion is a Reilly triangle protrusion, and when the chin guard is in the lower and upper limit positions, the square groove rotates until its apex corresponds to the apex of the Reilly triangle protrusion. By defining the triangular protrusion as a Reilly triangle structure, it achieves backlash-free continuous rolling contact within the square groove using the characteristics of a constant-width curve, eliminating the inherent jamming and impact of traditional triangular fits. Furthermore, by utilizing the cam characteristic where its center distance varies sinusoidally with the rotation angle, it provides a smooth radial clearance stroke at the initial stage of rotation, and at the end of rotation, it generates a continuous self-locking clamping force through the wedge-shaped fit between the arc surface and the groove wall, ensuring the chin guard is stably positioned in the upper and lower limit positions. Thus, it not only significantly improves the smoothness of the chin guard's rotation and the durability of the mechanism, but also achieves excellent sealing performance in the full-face helmet configuration.

[0011] In some embodiments, the motion mechanism for manipulating the lens and the jaw guard further includes a second protrusion fixed relative to the first groove, and a first connector fixed relative to the lens; the lens is connected to the first motion unit through the first connector; the first connector and the second protrusion are configured such that, during the process of the jaw guard rotating from its upper limit position relative to the support around the first protrusion to the upper limit position of the lens, it can drive the lens to rotate from its lower limit position relative to the support to the upper limit position, so that when the jaw guard rotates relative to the support to the upper limit position of the lens, it can continue to rotate downward relative to the support across the lens.

[0012] Because the jaw guard rotates around the first protrusion relative to the bracket from its upper limit position to the upper limit position of the lens, it is linked with the lens. This allows the operator to move the lens to its upper limit position while moving the jaw guard from its upper limit position to its lower limit position. Therefore, the jaw guard can smoothly cross the lens and continue to move to its lower limit position without having to operate the lens separately, making the operation convenient.

[0013] In some embodiments, the first connector is provided with a third protrusion; the second and third protrusions are configured such that, during the process of the jaw guard rotating relative to the support from its upper limit position around the first protrusion to the upper limit position of the lens, the second protrusion can abut against the third protrusion, thereby driving the lens to rotate relative to the support from its lower limit position to its upper limit position. Thus, during the movement of the jaw guard from its upper limit position to its lower limit position, the action of the second protrusion on the third protrusion can drive the lens to move to its upper limit position, thereby eliminating the need for separate lens operation and making operation convenient.

[0014] In some embodiments, the first connector has an approximate "C" shape and is located below the Reilly triangle protrusion. The opening of the "C" shape faces the side where the Reilly triangle protrusion is located. The lens is disposed at one end of the first connector, and the third protrusion is disposed at the other end of the first connector. This avoids the first connector interfering with the connection of the Reilly triangle protrusion to the bracket, and also ensures structural compactness while maintaining the weight of the components.

[0015] In some embodiments, the first connector has an approximate "C" shape and is located below the Reilly triangle protrusion. The opening of the "C" shape faces the side where the Reilly triangle protrusion is located. The lens is disposed at one end of the first connector, and the third protrusion is disposed at the other end of the first connector. The first groove is disposed on a square platform, which is fixedly disposed relative to the jaw guard. The second protrusion is disposed at the apex of the square platform. This ensures convenient installation of the first groove without excessively increasing the weight of the motion mechanism.

[0016] In some embodiments, the first connector is an approximately "C"-shaped structure located below the Reilly triangle protrusion, with the opening of the "C"-shaped structure facing the side where the Reilly triangle protrusion is located. The lens is disposed at one end of the first connector, and the third protrusion is disposed at the other end of the first connector. The first motion unit includes a first pivot shaft for rotating the first connector relative to the bracket. The first pivot shaft is disposed below the first center of the Reilly triangle protrusion and on the side of the first center of the Reilly triangle protrusion and the first groove away from the lens.

[0017] Since the first pivot of the lens is fixed relative to the support and located on the side away from the lens from the first center of the Leylet triangle protrusion and the first groove, and is located below the first center of the Leylet triangle protrusion, the guard will move towards the front and top of the lens as the guard and the first groove rotate around the Leylet triangle protrusion from its lower limit position to its upper limit position, so that the guard can continue to move upward over the lens when the lens is in the upper limit position.

[0018] In some embodiments, the motion mechanism for manipulating the lens and the jaw guard further includes a first guide mechanism, which includes a first guide rod and a first slide groove that are adapted to each other. The first slide groove is fixedly disposed relative to the bracket. The first slide groove includes an arc segment and gradient segments located at both ends of the arc segment. The arc segment is centered on a first pivot axis. The distance between the gradient segment and the first pivot axis decreases as the distance between the gradient segment and the arc segment increases. The gradient segments at both ends correspond to the upper limit position and the lower limit position of the lens, respectively. The first guide rod is disposed on the first connector through a first elastic element, and the first elastic element is configured to have a spring force that drives the first guide rod to move toward the side where the first pivot axis is located.

[0019] Therefore, when the lens moves to the upper or lower limit position, the first guide rod will move to the gradient section under the elastic force of the first elastic element, so as to increase the resistance of the first guide rod moving from the gradient section to the arc section, thereby enabling the lens to be stably in its upper and lower limit positions.

[0020] In some embodiments, the motion mechanism for manipulating the lens and the jaw guard further includes a deformable member fixedly disposed relative to the support; the deformable member is provided with a second groove that corresponds to and fits the position of the second protrusion when the jaw guard is in its upper limit position. Thus, when the jaw guard is in its upper limit position, the stability of the jaw guard in the upper limit position can be further increased by the second protrusion engaging with the second groove.

[0021] According to another aspect of the invention, a helmet is also provided.

[0022] The helmet includes a helmet body and the aforementioned motion mechanism for controlling the visor and chin guard; the bracket is fixedly mounted relative to the helmet body.

[0023] Since the rotation of the chin guard relative to the support is limited by the rotation of the square groove relative to the triangular protrusion, the instantaneous rotation center of the chin guard during the rotation process is not a fixed axis. This causes the chin guard to move forward and / or upward during the rotation relative to the support, thereby creating a gap between the chin guard and the lens during the rotation of the chin guard relative to the support, thus reducing the frictional resistance between the chin guard and the lens. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a motion mechanism for controlling a lens and a jaw guard according to an embodiment of the present invention, in which both the jaw guard and the lens are in the lower limit position. Figure 2 for Figure 1 The diagram shows the first disassembled state of the motion mechanism used to control the lens and the jaw guard. Figure 3 Figure 1 The diagram shows the second disassembled state of the motion mechanism for controlling the lens and the jaw guard, with the jaw guard omitted. Figure 4 This is a schematic diagram of the structure of a motion mechanism for controlling the lens and the jaw guard according to an embodiment of the present invention, in which the lens is driven to its upper limit position by the jaw guard. Figure 5 for Figure 4 The schematic diagram of the movement mechanism used to control the lens and the jaw guard is omitted. Figure 6 This is a schematic diagram of the jaw guard spanning the lens, which is a movement mechanism for controlling the lens and the jaw guard according to an embodiment of the present invention. Figure 7 for Figure 6 The schematic diagram of the movement mechanism used to control the lens and the jaw guard is omitted. Figure 8 This is a schematic diagram of the structure of a motion mechanism for controlling the lens and the lens according to an embodiment of the present invention, in which both the jaw guard and the lens are in the upper limit position. Figure 9 for Figure 8 The schematic diagram of the movement mechanism used to control the lens and the jaw guard is omitted. Figure 10 This is a schematic diagram of the jaw guard moving from its upper limit position to the upper limit position of the lens in a motion mechanism for controlling the lens and the jaw guard according to an embodiment of the present invention. Figure 11 for Figure 10 The diagram shown is an omitted structural schematic of the jaw guard, which is used to control the movement mechanism of the lens and the jaw guard. Figure 12 This is a schematic diagram of the structure of a jaw guard that crosses over a lens at its upper limit position from its upper limit position, according to an embodiment of the present invention, for a motion mechanism for manipulating a lens and a jaw guard. Figure 13 for Figure 12 The diagram shown is an omitted structural schematic of the jaw guard, which is used to control the movement mechanism of the lens and the jaw guard. Figure 14 This is a schematic diagram of the helmet in full-face helmet mode according to one embodiment of the present invention; Figure 15 This is a schematic diagram of the structure of a helmet according to an embodiment of the present invention, showing the chin guard moving from its upper limit position to the upper limit position of the visor towards the upper limit position of the visor. Reference numerals: 100, helmet body; 10, bracket; 11, deformable component; 111, second groove; 21, lens; 211, first connector; 2111, third protrusion; 212, fourth protrusion; 22, chin guard; 30, first motion unit; 31, first pivot axis; 41, first protrusion; 411, first center; 42, square platform; 421, first groove; 422, second protrusion; 423, first through hole; 50, first guide mechanism; 51, first guide rod; 52, first slide; 521, arc segment; 522, gradient segment; 53, first elastic component. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0026] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising" or "including" include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The terminology used herein is generally that commonly used by those skilled in the art; in case of any discrepancy with commonly used terminology, the terminology used herein shall prevail.

[0027] Furthermore, for ease of description, spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” may be used herein to describe the relationship between one element or component and another (or other elements or components) as shown in the figure. In addition to the orientations shown in the figure, spatial relative terms are intended to include different orientations of the device during use or operation. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein can be interpreted accordingly.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Figures 1 to 13 The diagram schematically illustrates a motion mechanism for manipulating a lens and a jaw guard according to a first embodiment of the present invention.

[0030] like Figure 2 As shown, the motion mechanism for controlling the lens and the jaw guard includes a bracket 10, a first pivot shaft 31 that pivotally connects the lens 21 to the bracket 10, and a first protrusion 41 and a first groove 421 that are adapted to each other; the first protrusion 41 is a triangular protrusion that is fixedly mounted on the bracket 10; the first groove 421 is a square groove that is fixedly mounted on the jaw guard 22; the first protrusion 41 and the first groove 421 are configured such that when the first groove 421 rotates relative to the first protrusion 41, the jaw guard 22 can drive the lens 21 to rotate relative to the bracket 10.

[0031] Since the first pivot axis 31 is fixed relative to the bracket 10, the lens 21 can rotate relative to the bracket 10 around the first pivot axis 31. The rotation of the chin guard 22 relative to the bracket 10 is limited by the rotation of the square groove relative to the triangular protrusion. This means that the instantaneous rotation center of the chin guard 22 during rotation is not a fixed axis. Consequently, the chin guard 22 also moves forward (towards the front of the helmet) and / or upward (towards the top of the helmet) during rotation relative to the bracket 10. For example, when both the lens 21 and the chin guard 22 are at their lower limit positions (e.g., ... Figure 1 When the theoretical rotation center of the jaw guard 22 is X1 and the vertical distance between it and the first pivot axis 31 is Y1, as shown in the figure, the theoretical rotation center of the jaw guard 22 is offset relative to the first pivot axis 31 (forward and upward). During the rotation of the first groove 421 and the jaw guard 22 relative to the triangular protrusion to move the lens 21 to its upper limit position, the theoretical rotation center of the jaw guard 22 is offset relative to the first pivot axis 31 (forward and upward). At a certain position during the rotation (e.g., Figure 4 As shown, the theoretical rotation center of the jaw guard 22 is X2 horizontally and Y2 vertically from the first pivot axis 31, with X2-X1>0 and Y2-Y1>0, so that a gap is formed between the jaw guard 22 and the lens 21 during the rotation of the jaw guard 22 relative to the support 10, thereby reducing the frictional resistance between the jaw guard 22 and the lens 21.

[0032] In some embodiments, such as Figure 2 As shown, the first pivot axis 31 constitutes the first motion unit 30 of an embodiment of the present invention.

[0033] In some preferred embodiments, such as Figure 2 , Figure 3 , Figure 5 , Figure 7 , Figure 9 , Figure 11 and 13 As shown, the first protrusion 41 is a Leroy triangle protrusion, and the pallet guard 22 is in the lower limit position (as shown). Figure 1 and Figure 2 (as shown) and upper limit position (as shown) Figure 8 and Figure 9 When the square groove is rotated until its apex corresponds to the apex of the Reilly triangle protrusion (as shown), the square groove rotates until its apex corresponds to the apex of the Reilly triangle protrusion (as shown). Figure 2 and Figure 9As shown, by utilizing the fixed-width curve characteristics of the Reilly triangle, a backlash-free continuous rolling contact is achieved within the square groove, eliminating the inherent jamming and impact of traditional triangular fits, thereby improving the smoothness of the chin guard 22's flipping operation and the durability of the mechanism; it can also utilize the cam characteristics of the Reilly triangle's center distance changing sinusoidally with the rotation angle to provide a smooth radial relief stroke at the beginning of rotation, and at the end of rotation, rely on the wedge-shaped fit between the arc surface and the groove wall to generate a continuous self-locking clamping force, so that the chin guard 22 can be stably in the upper and lower limit positions, and can ensure excellent sealing performance in the full-face helmet state.

[0034] In some preferred embodiments, combined with Figures 8 to 13 As shown, the motion mechanism for manipulating the lens and the jaw guard also includes a second protrusion 422 fixed relative to the first groove 421, and a first connector 211 fixedly disposed relative to the lens 21; the first connector 211 is pivotally connected to the bracket 10 via a first pivot shaft 31; the first connector 211 and the second protrusion 422 are configured such that the jaw guard 22, from its upper extreme position (e.g., Figure 8 and Figure 9 As shown, during the process of rotating around the first protrusion 41 relative to the support 10 to the upper limit position of the lens 21, if the lens 21 is in the lower limit position (such as...), Figure 10 and Figure 11 As shown), the second protrusion 422 can drive the lens 21 to rotate from its lower limit position relative to the bracket 10 to its upper limit position (as shown). Figure 12 and Figure 13 As shown, when the jaw guard 22 rotates relative to the support 10 to the upper limit position of the lens 21, it can continue to rotate downward relative to the support 10 over the lens 21. This allows the operator to move the lens 21 to its upper limit position while moving the jaw guard 22 from its upper limit position to its lower limit position. Thus, the jaw guard 22 can smoothly move over the lens 21 to its lower limit position without the need for additional operation of the lens 21, making the operation convenient.

[0035] In one embodiment, during the rotation of the jaw guard 22 from its upper limit position around the first protrusion 41 relative to the support 10 to the upper limit position of the lens 21, the second protrusion 422 can drive the lens 21, which is in the lower limit position, to move to the upper limit position. Figure 11 and Figure 13As shown, the first connector 211 is provided with a third protrusion 2111; the second protrusion 422 and the third protrusion 2111 are configured such that, during the process of the jaw guard 22 rotating relative to the bracket 10 from its upper limit position around the first protrusion 41 to the upper limit position of the lens 21, the second protrusion 422 can abut against the third protrusion 2111 to drive the lens 21 to rotate relative to the bracket 10 from its lower limit position to its upper limit position. This allows the lens 21 to move to its upper limit position through the action of the second protrusion 422 on the third protrusion 2111 during the movement of the jaw guard 22 from its upper limit position to its lower limit position, thus eliminating the need for separate operation of the lens 21 and making operation convenient. In some preferred embodiments, such as... Figure 11 As shown, the first connector 211 has an approximately "C"-shaped structure and is located below the Reilly triangle protrusion. The opening of the "C"-shaped structure faces the side where the Reilly triangle protrusion is located. The lens 21 is located at one end of the first connector 211, and the third protrusion 2111 is located at the other end of the first connector 211. The first center 411 of the Reilly triangle protrusion is fixedly connected to the bracket 10 through the connector to avoid the first connector 211 affecting the connection of the Reilly triangle protrusion on the bracket 10. This also ensures both structural compactness and component lightweighting. Further preferably, as... Figure 11 and Figure 13 As shown, the first groove 421 is disposed on the square platform 42, which is fixedly disposed relative to the jaw guard 22. The second protrusion 422 is disposed at the top corner of the square platform 42, so as to ensure the ease of installation of the first groove 421 without excessively increasing the weight of the moving mechanism. More preferably, as... Figure 11 and Figure 13 As shown, the square platform 42 and the second protrusion 422 are located above the first connector 211 where the third protrusion 2111 is not provided (on the side away from the bracket 10). The opening of the first groove 421 is positioned away from the bracket 10. The Reilly triangle protrusion is placed in the first groove 421, and the connector that connects the Reilly triangle protrusion to the bracket 10 passes through the first through hole 423 on the square platform 42 to fix the square platform 42 and ensure the compactness of the structure. Further preferably, as... Figure 11 and Figure 13 As shown, the first pivot axis 31 is located below the first center 411 of the Reilly triangle protrusion and on the side of the Reilly triangle protrusion and the first groove 421 away from the lens 21, so that as the guard 22 and the first groove 421 rotate around the Reilly triangle protrusion from its lower limit position to its upper limit position, the guard 22 will move towards the front and top of the lens 21, so that it can continue to move upward over the lens 21 when the lens 21 is in the upper limit position.

[0036] In some preferred embodiments, combined with Figure 7and Figure 8 As shown, the motion mechanism for manipulating the lens and the jaw guard also includes a deformable component 11 fixedly disposed relative to the bracket 10; the deformable component 11 is provided with a mechanism that, when the jaw guard 22 is in the upper limit position (e.g., Figure 7 As shown, the second groove 111 corresponds to and is adapted to the position of the second protrusion 422. When the jaw guard 22 is in its upper limit position, the second protrusion 422 can be engaged in the second groove 111 by deforming the deformable member 11. When the second protrusion 422 needs to be moved out of the second groove 111, it needs to overcome the deformation force of the deformable member 11, thereby further increasing the stability of the jaw guard 22 in the upper limit position.

[0037] In some preferred embodiments, combined with Figure 2 , Figure 3 and Figure 11 The motion mechanism for manipulating the lens and the jaw guard further includes a first guide mechanism 50. The first guide mechanism 50 includes a first guide rod 51 and a first slide groove 52 that are adapted to each other. The first slide groove 52 is fixedly disposed relative to the bracket 10. The first slide groove 52 includes an arc segment 521 and gradient segments 522 located at both ends of the arc segment 521. The arc segment 521 is centered on the first pivot axis 31. The distance between the gradient segment 522 and the first pivot axis 31 decreases as the distance between the gradient segment 522 and the arc segment 521 increases. The gradient segments 522 at both ends are respectively located at the upper limit positions of the lens 21. Corresponding to the lower limit position; the first guide rod 51 is mounted on the first connector 211 via the first elastic element 53, and the first elastic element 53 is configured to have a spring force that drives the first guide rod 51 to move toward the side where the first pivot axis 31 is located, so that when the lens 21 moves to the upper limit position or the lower limit position, the first guide rod 51 will move into the gradient section 522 under the drive of the spring force of the first elastic element 53, thereby increasing the resistance of the first guide rod 51 moving from the gradient section 522 to the arc section 521, so that the lens 21 can be stably positioned at its upper limit position and lower limit position. As one implementation of the first elastic element 53, such as Figure 2 , Figure 3 and Figure 11 As shown, the first elastic element 53 is a compression spring.

[0038] In some preferred embodiments, such as Figure 1 As shown, a fourth protrusion 212 is also provided on the outer periphery of the bottom of the lens 21. The horizontal length XN of the fourth protrusion 212 can be adjusted as needed so that when both the jaw guard 22 and the lens 21 are in the lower limit position (e.g. Figure 1 As shown), the jaw guard 22 can move the lens 21 to its upper limit position by abutting against the fourth protrusion 212; and can make the fourth protrusion 212 move when the lens 21 is in its upper limit position (as shown). Figure 6 (As shown) it will not block the jaw guard 22 from crossing.

[0039] In some preferred embodiments, at least one of the first connector, the first protrusion, and the square platform is made of a material with good rigidity and strength, such as polycarbonate (PC), aluminum alloy, or magnesium alloy.

[0040] In some preferred embodiments, the deformable component 11 is made of materials such as TPE (thermoplastic elastomer), TPU (thermoplastic polyurethane), or general deformable plastics. As another embodiment of the first motion unit 30, the lens 21 is rotatably connected to the bracket 10 via a multi-link hinge unit (e.g., a double-bar or quadruple-bar mechanism).

[0041] Figures 14 to 15 A helmet according to a first embodiment of the present invention is shown schematically.

[0042] like Figure 14 and Figure 15 As shown, the helmet includes a helmet body 100 and the aforementioned motion mechanism for controlling the visor and chin guard; the bracket 10 is fixedly disposed relative to the helmet body 100 (the bracket 10 can be mounted on the helmet body 100, or the bracket 10 can be integrally formed on the helmet body 100, that is, the helmet body 100 is the bracket 10).

[0043] Because the rotation of the chin guard 22 relative to the support 10 is limited by the rotation of the square groove relative to the triangular protrusion, the instantaneous rotation center of the chin guard 22 during rotation is not a fixed axis. This causes the chin guard 22 to move forward and / or upward during rotation relative to the support 10, for example, when the helmet changes from a full-face helmet position (e.g., ...). Figure 14 As shown, during the process of transforming into a half-helmet state, the chin guard 22 forms a gap with the visor 21 as it rotates relative to the support 10, reducing the frictional resistance between the chin guard 22 and the visor 21. Furthermore, the chin guard 22 can continue to rotate relative to the helmet body 100 after passing over the visor 21 at its upper limit position (as shown). Figure 15 (As shown), to enable the conversion between full-face and half-face helmets.

[0044] In this invention, the connection or installation is a fixed connection unless otherwise specified. A fixed connection can be implemented as a detachable or non-detachable connection commonly used in the prior art. A detachable connection can be implemented using existing technologies, such as threaded connections or keyed connections. A non-detachable connection can also be implemented using existing technologies, such as welding or adhesive bonding.

[0045] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A motion mechanism for controlling a lens and a jaw guard, characterized in that, include: Frame (10); A first motion unit (30) is provided on the bracket (10), and the first motion unit (30) is configured to enable the lens (21) to rotate relative to the bracket (10); and a first protrusion (41) and a first groove (421) that fit together; wherein, The first protrusion (41) is a triangular protrusion, which is fixedly disposed relative to the bracket (10); The first groove (421) is a square groove, which is fixedly disposed relative to the jaw guard (22); The first protrusion (41) and the first groove (421) are configured such that when the first groove (421) and the guard (22) rotate relative to the first protrusion (41), the lens (21) can be driven to rotate relative to the bracket (10).

2. The motion mechanism for controlling the lens and the jaw guard according to claim 1, characterized in that, The first protrusion (41) is a Reilly triangle protrusion, and when the guard (22) is in the lower limit position and the upper limit position, the square groove rotates until its apex corresponds to the apex of the Reilly triangle protrusion.

3. The motion mechanism for controlling the lens and the jaw guard according to claim 2, characterized in that, It also includes a second protrusion (422) fixed relative to the first groove (421), and a first connector (211) fixed relative to the lens (21); The lens (21) is connected to the first motion unit (30) via the first connector (211); The first connector (211) and the second protrusion (422) are configured such that, during the process of the jaw guard (22) rotating from its upper limit position around the first protrusion (41) relative to the bracket (10) to the upper limit position of the lens (21), it can drive the lens (21) to rotate from its lower limit position relative to the bracket (10) to the upper limit position, so that when the jaw guard (22) rotates relative to the bracket (10) to the upper limit position of the lens (21), it can continue to rotate downward relative to the bracket (10) across the lens (21).

4. The motion mechanism for controlling the lens and the jaw guard according to claim 3, characterized in that, The first connector (211) is provided with a third protrusion (2111); The second protrusion (422) and the third protrusion (2111) are configured such that, during the process of the guard (22) rotating from its upper limit position around the first protrusion (41) relative to the bracket (10) to the upper limit position of the lens (21), the second protrusion (422) can abut against the third protrusion (2111) to drive the lens (21) to rotate from its lower limit position relative to the bracket (10) to the upper limit position.

5. The motion mechanism for controlling the lens and the jaw guard according to claim 4, characterized in that, The first connector (211) has an approximate "C" shape structure and is located below the Leroy triangle protrusion. The opening of the "C" shape structure faces the side where the Leroy triangle protrusion is located. The lens (21) is located at one end of the first connector (211), and the third protrusion (2111) is located at the other end of the first connector (211).

6. The motion mechanism for controlling the lens and the jaw guard according to claim 5, characterized in that, The first groove (421) is disposed on the square platform (42), which is fixedly disposed relative to the jaw guard (22), and the second protrusion (422) is disposed at the top corner of the square platform (42).

7. The motion mechanism for controlling the lens and the jaw guard according to claim 5, characterized in that, The first motion unit (30) includes a first pivot shaft (31) for rotating the first connector (211) relative to the bracket (10). The first pivot shaft (31) is located below the first center (411) of the Leylet triangle protrusion and on the side of the first center (411) of the Leylet triangle protrusion and the first groove (421) away from the lens (21).

8. The motion mechanism for controlling the lens and the jaw guard according to claim 7, characterized in that, It also includes a first guide mechanism (50), which includes a first guide rod (51) and a first slide groove (52) that are adapted to each other, and the first slide groove (52) is fixedly disposed relative to the bracket (10); The first groove (52) includes an arc segment (521) and gradient segments (522) located at both ends of the arc segment (521). The arc segment (521) is centered on the first pivot axis (31). The distance between the gradient segment (522) and the first pivot axis (31) decreases as the distance between the gradient segment (522) and the arc segment (521) increases. The gradient segments (522) at both ends correspond to the upper limit position and the lower limit position of the lens (21), respectively. The first guide rod (51) is disposed on the first connector (211) via a first elastic element (53), and the first elastic element (53) is configured to have a spring force that drives the first guide rod (51) to move toward the side where the first pivot axis (31) is located.

9. The motion mechanism for controlling the lens and the jaw guard according to any one of claims 3 to 8, characterized in that, It also includes a deformable component (11) that is fixedly disposed relative to the bracket (10); The deformable part (11) is provided with a second groove (111) that corresponds to and is adapted to the position of the second protrusion (422) when the jaw guard (22) is in the upper limit position.

10. A helmet, characterized in that, include: Helmet body (100); The motion mechanism for manipulating the lens and the jaw guard as described in any one of claims 1 to 9; The bracket (10) is fixedly disposed relative to the helmet body (100).

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