Adapter for connecting a visor to a helmet, and visor and helmet assembly

Abstract

An adapter for connecting a visor to a helmet comprises a first sub-assembly and a second sub-assembly, each of said first and second sub-assemblies comprising a base, a boom selectively linearly movable with respect to said base and non-rotatably mounted with respect to said base, and a swing arm having a pivoting end portion pivotally connected to said boom and an opposite fixed end portion configured to be non-rotatably connected to said visor, each of said bases being configured to be detachably connected to said helmet, said first sub-assembly and / or said second sub-assembly further comprising an adjustment device interposed between the respective boom and the pivoting end portion of the respective swing arm, said adjustment device being configured to constrain said swing arm to be pivotable only between a first pivoting angle of said swing arm with respect to said adjustment device and a second pivoting angle of said swing arm with respect to said adjustment device, and said adjustment device being further configured to be adjustable in its angular position with respect to said boom. A visor and helmet assembly is also disclosed.

Description

TECHNICAL FIELD

[0001] The present application relates generally to an adapter for connecting a face shield to a helmet, which can be used to connect the face shield to the helmet so that the face shield can be rotated relative to the helmet as needed. BACKGROUND

[0002] In a construction site or other dangerous work site, a worker must wear a helmet (or safety cap) to protect the head from falling objects. In addition, when performing operations such as welding, the worker also needs to wear a protective face shield (e.g., a welding face shield) to further protect the face and / or eyes from injury. Therefore, it is necessary to design an adapter so that the protective face shield can be properly connected to the helmet via the adapter.

[0003] In addition, during the operation, the worker may need to observe the site to be operated from time to time with naked eyes. For example, in the case of welding operation, the worker needs to observe the welding site with naked eyes by lifting the face shield while the face shield and the helmet are still connected. Therefore, such an adapter needs to ensure that the face shield and the helmet can be conveniently switched between different positions as needed when connected, such as a position that covers the worker's face and a position that exposes the worker's face.

[0004] At the same time, since the face shield is provided with an observation window through which the line of sight can be observed, it is also necessary to fine-tune the position of the face shield when it covers the worker's face, i.e., adjust the viewing angle position of the observation window of the face shield and / or the front and back position of the face shield relative to the helmet. SUMMARY

[0005] To solve the above problems, the present application aims to provide an adapter by which an existing face shield can be conveniently connected to an existing helmet, and the viewing angle position of the face shield and / or the front and back position of the face shield relative to the helmet can be adjusted as needed to facilitate the corresponding operation of the worker wearing the helmet. At the same time, such an adapter can also ensure that the face shield can be conveniently lifted to expose the worker's face. Since the face shield is heavy, such an adapter can also ensure that the face shield can be conveniently locked in place after being lifted.

[0006] According to one aspect of the present application, an adapter for connecting a face shield to a helmet is provided, comprising a first sub-assembly and a second sub-assembly,

[0007] Each of the first sub-assembly and the second sub-assembly comprises a base, a cantilever selectively linearly movable and non-rotatably mounted relative to the base, and a swing arm having a pivotal end pivotally connected with the cantilever and an opposite fixed end configured to be non-rotatably connected with the face shield, each of the base is configured to be detachably connected to the helmet,

[0008] The first sub-assembly and / or the second sub-assembly further comprises an adjusting device sandwiched between the corresponding cantilever and the pivotal end of the corresponding swing arm, the adjusting device is configured to restrict the swing arm to be pivotable only between a first pivotal angle of the swing arm relative to the adjusting device and a second pivotal angle of the swing arm relative to the adjusting device, and the adjusting device is further configured to be adjustable in the angle position thereof relative to the cantilever.

[0009] By means of the adapter, the face shield connected with the helmet can not only be moved and locked between a shielding position relative to the helmet and a lifting position relative to the helmet, but also be moved back and forth relative to the helmet, while the view angle of the face shield at the shielding position can also be adjusted accordingly, which brings great convenience to the user of the face shield and the helmet.

[0010] Optionally, the adjusting device comprises an adjusting ring sandwiched between the cantilever of the first sub-assembly and the swing arm of the first sub-assembly, the adjusting ring is non-pivotably mounted relative to the cantilever of the first sub-assembly, and the adjusting ring is configured to define one of the first pivotal angle and the second pivotal angle;

[0011] The adjusting device further comprises a view angle adjusting piece sandwiched between the cantilever of the second sub-assembly and the swing arm of the second sub-assembly, the view angle adjusting piece is configured to define the other of the first pivotal angle and the second pivotal angle, and the angle position of the view angle adjusting piece relative to the cantilever of the second sub-assembly is selectively lockable.

[0012] The adjusting ring and the view angle adjusting piece of the adjusting device are respectively designed in two different sub-assemblies, which can reduce the processing difficulty of the parts, and also reduce the possibility of failure of the parts due to long-term work because the two different pivotal angles are respectively defined by the adjusting ring and the view angle adjusting piece.

[0013] Optionally, the view angle adjusting piece is formed with a plurality of gear holes, the plurality of gear holes are spaced apart within a circular arc coaxial with a pivot axis of the swing arm of the second sub-assembly relative to the view angle adjusting piece, and a gear block is formed on a surface of the cantilever of the second sub-assembly, the gear block is configured to be received into a selected gear hole of the plurality of gear holes to make the view angle adjusting piece non-rotatable relative to the cantilever of the second sub-assembly.

[0014] Optionally, a guide groove is formed in the adjusting ring, the guide groove is circular arc-shaped and the center of the circular arc coincides with the pivot axis of the swing arm of the first subassembly relative to the adjusting ring,

[0015] A guide protrusion is formed on the pivot end of the swing arm of the first subassembly, the guide protrusion at least partially extends into the guide groove and moves within the guide groove as the pivot end of the swing arm of the first subassembly pivots relative to the adjusting ring,

[0016] A locking bump is formed in the guide groove of the adjusting ring, only when the locking bump contacts and presses the guide protrusion, one of the first pivot angle and the second pivot angle is defined.

[0017] Optionally, a guide groove is formed in the view angle adjusting piece, the guide groove is circular arc-shaped and the center of the circular arc coincides with the pivot axis of the swing arm of the second subassembly relative to the view angle adjusting piece,

[0018] A guide protrusion is formed in the pivot end of the swing arm of the second subassembly, the guide protrusion at least partially extends into the guide groove and moves within the guide groove as the pivot end of the swing arm of the second subassembly pivots relative to the view angle adjusting piece, only when the guide protrusion of the pivot end of the swing arm of the second subassembly is blocked within the guide groove, the other of the first pivot angle and the second pivot angle is defined.

[0019] Optionally, only when the guide protrusion of the pivot end of the swing arm of the second subassembly is blocked by the end of the guide groove within the guide groove, the other of the first pivot angle and the second pivot angle is defined.

[0020] Optionally, the number of the gear position bumps formed on the surface of the cantilever of the second subassembly is at least one and less than the number of the gear position holes.

[0021] Optionally, the number of the guide grooves formed in the adjusting ring is one or two, and the guide grooves are distributed about the pivot axis of the swing arm of the first subassembly around the adjusting ring,

[0022] The number of the guide protrusions formed on the pivot end of the swing arm of the first subassembly is one or two, and the one or two guide protrusions at least partially extend into the corresponding guide groove,

[0023] Only when the locking bump of each guide groove contacts and presses the corresponding guide protrusion, one of the first pivot angle and the second pivot angle is defined.

[0024] Optionally, the adjusting device comprises a view angle adjusting piece sandwiched between the cantilever of the first subassembly and the swing arm of the first subassembly and / or sandwiched between the cantilever of the second subassembly and the swing arm of the second subassembly,

[0025] The view angle adjusting piece is configured to define both the first pivot angle and the second pivot angle, and the angle position of the view angle adjusting piece relative to the cantilever of the first subassembly and / or the cantilever of the second subassembly can be selectively locked.

[0026] Optionally, the view angle adjusting piece is formed with a plurality of gear holes, which are spaced apart within a circular arc coaxial with the pivot axis of the swing arm of the first subassembly and / or the swing arm of the second subassembly relative to the view angle adjusting piece, and a gear bump is formed on the surface of the cantilever of the first subassembly and / or the cantilever of the second subassembly, which is configured to be received into a selected gear hole of the plurality of gear holes to make the view angle adjusting piece unable to rotate relative to the cantilever of the first subassembly and / or the cantilever of the second subassembly.

[0027] Optionally, a guide groove is formed in the view angle adjusting piece, which is circular arc-shaped and the center of the circular arc coincides with the pivot axis of the swing arm of the first subassembly and / or the swing arm of the second subassembly relative to the view angle adjusting piece,

[0028] A guide protrusion is formed on the pivot end of the swing arm of the first subassembly and / or the swing arm of the second subassembly, which at least partially extends into the guide groove and moves within the guide groove as the pivot end of the swing arm of the first subassembly and / or the swing arm of the second subassembly pivots relative to the adjusting ring,

[0029] A locking bump is formed in the guide groove of the adjusting ring, and only when the locking bump contacts and presses the guide protrusion, one of the first pivot angle and the second pivot angle is defined.

[0030] Optionally, only when the guide protrusion is blocked at a position other than the guide protrusion within the guide groove, the other of the first pivot angle and the second pivot angle is defined.

[0031] Optionally, only when the guide protrusion is blocked by the end of the guide groove within the guide groove, the other of the first pivot angle and the second pivot angle is defined, wherein the end is opposite to the locking bump within the guide groove.

[0032] Optionally, the gear bump formed on the surface of the cantilever of the first subassembly and / or the cantilever of the second subassembly is at least one and the number is less than the number of the gear holes.

[0033] Optionally, a pair of metal corrugated sheets are provided between the view angle adjusting sheet and the pivoted end of the swing arm of the second sub-assembly, which are configured to rub against each other to generate a prompt sound when the pivoted end of the swing arm of the second sub-assembly is pivoted relative to the view angle adjusting sheet.

[0034] The design of the metal corrugated sheets improves the durability of the components. In an alternative embodiment, similar metal corrugated sheets can also be replaced by corrugated structures integrally formed on the view angle adjusting sheet and the pivoted end of the swing arm when they are formed.

[0035] Optionally, a pair of metal corrugated sheets are provided between the view angle adjusting sheet and the pivoted end of the swing arm of the first sub-assembly and / or the second sub-assembly, which are configured to rub against each other to generate a prompt sound when the pivoted end of the swing arm of the second sub-assembly is pivoted relative to the view angle adjusting sheet.

[0036] Optionally, the cantilevered arm includes a straightly extending guide rail, at least a portion of which is received by the base, and a detent button is further provided in the base to selectively lock the guide rail in different positions relative to the base.

[0037] Optionally, the detent button is configured such that when it is only pressed, the guide rail can be freely moved relative to the base; and when it is not pressed, it is reset via a reset force to lock the guide rail in position relative to the base.

[0038] Optionally, the reset force is generated by a pair of magnets provided between the detent button and a receptacle of the base for movably receiving the detent button.

[0039] Optionally, the reset force is generated via a pair of magnets arranged with like magnetic poles opposite each other in a magnetic repulsion force; or, the reset force is generated via a pair of magnets arranged with unlike magnetic poles opposite each other in a magnetic attraction force.

[0040] Optionally, each of the first sub-assembly and the second sub-assembly further includes:

[0041] a knob provided with a threaded rod; and

[0042] a nut piece provided with a threaded sleeve configured to be screwed with the threaded rod of the knob after passing through the pivoted end, the adjusting device and the cantilevered arm, to define a pivoting axis of the pivoted end relative to the cantilevered arm. According to the present application, the design of the lug and the groove facilitates the assembly or disassembly of the relevant sub-assembly.

[0043] Optionally, two radially opposite lugs are formed on the inner wall of the central hole of the pivot end, and two radially opposite grooves are formed on the end of the threaded sleeve of the nut member inserted into the central hole, the lugs and the grooves are configured such that when the threaded sleeve is not screwed with the threaded rod, the two lugs can be respectively buckled into the two grooves to keep the pivot end, the adjusting device, the cantilever and the nut member together.

[0044] According to another aspect of the present application, there is also provided a face shield and helmet assembly comprising:

[0045] a helmet;

[0046] a face shield; and

[0047] the aforementioned adapter, wherein the helmet is connected with the face shield via the adapter, so that the swing arms of the first and second subassemblies of the adapter can be pivoted about the same axis relative to the respective cantilevers, the swing arms of the adapter are at a first pivot angle relative to the adjusting device of the adapter when the face shield is in the shielding position relative to the helmet, and the swing arms of the adapter are at a second pivot angle relative to the adjusting device of the adapter when the face shield is locked to the lifted position relative to the helmet.

[0048] With the aforementioned technical means of the present application, the face shield and helmet can be conveniently and detachably connected, and the front and back positions, the shielding and lifted locking positions, and the viewing angle positions of the face shield relative to the helmet can be easily adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0049] The principles and various aspects of the present application can be better understood from the following detailed description together with the accompanying drawings. It should be noted that the various drawings are not necessarily to scale, but are intended to illustrate the principles of the application. In the drawings:

[0050] Figure 1 is a perspective view schematically showing a face shield and helmet assembly according to an embodiment of the present application, wherein the face shield is connected to the helmet via an adapter according to an embodiment of the present application, and is in a shielding position relative to the helmet;

[0051] Figure 2 is a perspective view schematically showing Figure 1 the face shield and helmet assembly of

[0052] Figure 3 is a perspective view schematically showing an adapter according to an embodiment of the present application;

[0053] Figure 4Ais an exploded view schematically showing how a first sub-assembly of an adapter according to an embodiment of the application is assembled and connected to a helmet;

[0054] Figure 4B is an exploded view schematically showing how a second sub-assembly of an adapter according to an embodiment of the application is assembled and connected to a helmet;

[0055] Figure 5 is an exploded view schematically showing how a base of an adapter according to an embodiment of the application is connected to a prior art helmet;

[0056] Figure 6 is an exploded view schematically showing how a base of an adapter according to an embodiment of the application is connected to another prior art helmet;

[0057] Figure 7A is an axial cross-sectional view schematically showing a portion of a first sub-assembly of an adapter according to an embodiment of the application;

[0058] Figure 7B is an axial cross-sectional view schematically showing a portion of a second sub-assembly of an adapter according to an embodiment of the application;

[0059] Figure 8 is a schematic view schematically showing a swing arm in different positions relative to an adjustment ring according to an embodiment of the application;

[0060] Figure 9 is a schematic view schematically showing the assembly of a corrugated sheet to a swing arm according to an embodiment of the application;

[0061] Figure 10 is a perspective view schematically showing an adjustment sheet according to an embodiment of the application, wherein the adjustment sheet is equipped with a corrugated sheet;

[0062] Figure 11A is a schematic view schematically showing the relationship between an adjustment sheet, a guide protrusion, and a detent bump as part of an adjustment device according to an embodiment of the application, wherein the visor is in its shielded position relative to the helmet;

[0063] Figure 11B is a schematic view schematically showing the relationship between an adjustment ring, a guide protrusion, and a detent bump as another part of an adjustment device according to an embodiment of the application, wherein the visor is in its shielded position relative to the helmet;

[0064] Figure 12A is a schematic view schematically showing the relationship between an adjustment sheet, a guide protrusion, and a detent bump as part of an adjustment device according to an embodiment of the application, wherein the visor is in its lifted position relative to the helmet;

[0065] Figure 12B is a schematic view, schematically illustrating the relationship between the adjustment ring, the guide protrusion, and the detent bump as part of the adjustment device according to embodiments of the present application, wherein the face shield is in its raised position relative to the helmet, and the adjustment tab is at a different angular position than shown in

[0066] Figure 13A is a schematic view, schematically illustrating the relationship between the adjustment ring, the guide protrusion, and the detent bump as part of the adjustment device according to embodiments of the present application, wherein the face shield is in its raised position relative to the helmet, and the adjustment tab is at a different angular position than shown in Figure 11A ;

[0067] Figure 13B is a schematic view, schematically illustrating the relationship between the adjustment ring, the guide protrusion, and the detent bump as part of the adjustment device according to embodiments of the present application, wherein the face shield is in its raised position relative to the helmet, and the adjustment tab is at a different angular position than shown in Figure 11A ;

[0068] Figure 14A is a schematic view, schematically illustrating the relationship between the adjustment ring, the guide protrusion, and the detent bump as part of the adjustment device according to embodiments of the present application, wherein the face shield is in its raised position relative to the helmet, and the adjustment tab is at a different angular position than shown in Figure 11A ;

[0069] Figure 14B is a schematic view, schematically illustrating the relationship between the adjustment ring, the guide protrusion, and the detent bump as part of the adjustment device according to embodiments of the present application, wherein the face shield is in its raised position relative to the helmet, and the adjustment tab is at a different angular position than shown in Figure 11A ;

[0070] Figure 15 is an exploded perspective view, schematically illustrating a sub-assembly of an adapter according to another embodiment of the present application;

[0071] Figure 16A is a perspective view, schematically illustrating Figure 15 the swing arm and the adjustment tab of at one pivot angle relative to the adjustment tab;

[0072] and 16B are perspective views, schematically illustrating Figure 15 the swing arm and the adjustment tab of at another pivot angle relative to the adjustment tab. DETAILED DESCRIPTION

[0073] In the drawings of the present application, features of the same structure or function are denoted by the same reference numerals.

[0074] Figure 1 is a perspective view schematically showing a helmet 10, a visor 20 and an adapter 100 according to an embodiment of the present application. The adapter 100 is configured to connect the helmet 10 and the visor 20 so that the visor 20 can be switched between a shield position (as shown in Figure 1 ) relative to the helmet 10 and a lifted position (as shown in Figure 2 ) relative to the helmet 10. An observation window 21 is provided in the visor 20. Therefore, when the visor 20 is in the shield position relative to the helmet 10, the line of sight of the wearer of the helmet 10 can not be properly directed outward through the observation window 21 of the visor 20. According to the present application, the adapter 100 can be configured to adjust the viewing angle of the observation window 21 when the visor 20 is in the shield position relative to the helmet 10, i.e. the angle at which the wearer of the helmet 10 can conveniently observe outward through the observation window 21 of the visor 20. In addition, according to the present application, the adapter 100 can also be configured so that the helmet 10 can slide linearly relative to the visor 20 when the helmet 10 and the visor 20 are connected via the adapter 100. In this way, when the visor 20 is in the shield position relative to the helmet 10, the front-to-back distance of the visor 20 relative to the helmet 10 can be adjusted as desired. In addition, the adjustability of the front-to-back distance also facilitates the helmet 10 to be conveniently changed from the shield position to the lifted position relative to the helmet 10 as desired without any obstruction. According to the present application, the visor 20 can be a welding helmet or any other type of protective helmet. Since the visor 20 is relatively heavy, the adapter 100 of the present application is also configured so that the visor 20 can be locked in the lifted position relative to the helmet 10 as desired, thereby facilitating the wearer of the helmet 10 to observe the surrounding situation.

[0075] Figure 3 is a perspective view schematically showing an adapter 100 according to an embodiment of the present application. The adapter 100 comprises a first sub-assembly 100L and a second sub-assembly 100R. In the following description of the present application, the first sub-assembly 100L is described by way of example with the sub-assembly located on the left side of the helmet 10 or the visor 20, and the second sub-assembly 100R is described by way of example with the sub-assembly located on the right side of the helmet 10 or the visor 20. Of course, it should be clear to those skilled in the art that the following description relating to the first sub-assembly 100L and the second sub-assembly 100R can be interchanged with each other, provided that the design requirements of the adapter 100 of the present application can be met.

[0076] Further as shown in Figure 4AAs shown, the first sub-assembly 100L, or left sub-assembly 100L, includes a first base 110L, a first cantilever 120L, and a first swing arm 130L. The first base 110L is configured to detachably connect with the helmet 10. For example, the first base 110L can connect to the left side of the helmet 10 such that, after the connection, the first base 110L can be fixed relative to the helmet 10. The first cantilever 120L is linearly moveably connected to the first base 110L. For example, as the first cantilever 120L moves linearly relative to the first base 110L, the first cantilever 120L can be fixed relative to the first base 110L in any one of a plurality of different gear positions. The first swing arm 130L has two opposite ends, a pivoting end 130La and a fixed end 130Lb. The pivoting end 130La of the first swing arm 130L is pivotably connected to the first cantilever 120L, and the fixed end 130Lb of the first swing arm 130L is configured to cooperate with the retaining visor 20 such that the visor 20 is immovable relative to the first swing arm 130L.

[0077] As further shown in Figure 4B As shown, the second sub-assembly 100R, or right sub-assembly 100R, includes a second base 110R, a first cantilever 120R, and a first swing arm 130R. The second base 110R is configured to detachably connect with the helmet 10. For example, the second base 110R can connect to the right side of the helmet 10 such that, after the connection, the second base 110R can be fixed relative to the helmet 10. The second cantilever 120R is linearly moveably connected to the second base 110R. For example, as the second cantilever 120R moves linearly relative to the second base 110R, the second cantilever 120R can be fixed relative to the second base 110R in any one of a plurality of different gear positions. The second swing arm 130R has two opposite ends, a pivoting end 130Ra and a fixed end 130Rb. The pivoting end 130Ra of the second swing arm 130R is pivotably connected to the second cantilever 120R, and the fixed end 130Rb of the second swing arm 130R is configured to cooperate with the retaining visor 20 such that the visor 20 is immovable relative to the second swing arm 130R.

[0078] Figure 5 is an exploded view schematically showing how the first base 110L and the second base 110R are installed on the helmet 10. On the helmet 10, there are provided two slots 11 (only the left slot 11 can be seen in Figure 5 , while the right slot 11 is hidden). For example, the two slots 11 are located near the brim of the helmet 10 and are diametrically symmetric to each other.

[0079] Further referring to Figure 4A and4B On the first base 110L, a plug 111 is provided, and on the second base 110R, a similar plug 111 is also provided. According to the prior art, the socket 11 of the helmet 10 is a standardized design. Thus, the plugs 111 of the first base 110L and the second base 110R can also be plugs of a standardized design using the prior art. In this way, the first base 110L and the second base 110R can be detachably inserted into the socket 11 of the helmet 10 and fixed in place via the respective plug 111.

[0080] Figure 6 is an exploded view schematically showing a first base 110L' and a second base 110R' according to another embodiment of the present application. The first base 110L' and the second base 110R' are configured to be detachably connected to a helmet 10' which is not provided with a socket. Such a helmet 10' is also a helmet commonly used in the prior art. The first base 110L' and the second base 110R' are each provided with a clasp 111'. The clasps 111' also belong to a standardized design of the prior art and are configured for detachable connection to the helmet 10' via a strap 30, as Figure 6 shown. For example, the strap 30 with the first base 110L' and the second base 110R' can be fitted over and fastened to the brim of the helmet 10', and then the first base 110L' and the second base 110R' are clamped and fixed to the brim of the helmet 10' via the respective clasps 111'.

[0081] The first base 110L and the first base 110L' are identical in all other features except for the design of the plug and the clasp, and the second base 110R and the second base 110R' are identical in all other features except for the design of the plug and the clasp. Therefore, it should be clear to the person skilled in the art that the following description of those features of the first base 110L and the second base 110R (except for the plug) also applies to the first base 110L' and the second base 110R'.

[0082] As Figure 4A and 4BAs shown, the first base 110L and the second base 110R are each provided with a straight guide slot 112. The first cantilever 120L and the second cantilever 120R are each provided with a straightly extending guide rail 121. The cross section of the guide slot 112 of the first base 110L is configured to be complementary to the cross section shape of the guide rail 121 of the first cantilever 120L, such that the guide rail 121 can be received by the guide slot 112 and can be selectively moved linearly, wherein the cross section is measured along a direction perpendicular to the moving direction. The guide slot 112 of the second base 110R and the guide rail 121 of the second cantilever 120R are configured similarly to the guide slot 112 of the first base 110L and the guide rail 121 of the first cantilever 120L. The first base 110L and the first cantilever 120L are configured such that, after the first base 110L is fixed to the helmet 10 and the guide rail 121 is received by the guide slot 112, most of the first cantilever 120L is located outside the first base 110L and the helmet 10. Similarly, the second base 110R and the second cantilever 120R are configured such that, after the second base 110R is fixed to the helmet 10 and the guide rail 121 is received by the guide slot 112, most of the second cantilever 120R is located outside the second base 110R and the helmet 10. A detent button 113 is further provided in the first base 110L. The detent button 113 is formed with a detent protrusion 113a (e.g. Figure 4A The detent protrusion is hidden in the view due to the view angle, please refer to the two detent protrusions 113a in Figure 4B ). In the guide rail 121 received by the guide slot 112 of the first base 110L, a plurality of detent recesses 121a are formed (as the detent recesses 121a in the guide rail 121 of the first cantilever 120L in Figure 4B are hidden, please refer to the same configured detent recesses 121a in the guide rail 121 of the second cantilever 120R in Figure 4A ). The detent recesses 121a are equidistantly spaced from each other along the moving direction of the first cantilever 120L relative to the first base 110L. The detent button 113 is configured relative to the first base 110L such that it can be pressed along a direction substantially perpendicular to the moving direction of the guide rail 121 of the first cantilever 120L and can be automatically reset. When the detent button 113 is pressed by an external force (e.g. applied by a human finger), the detent protrusion 113a located in the guide slot 112 is not located in any of the detent recesses 121a and does not affect the free movement of the guide rail 121 relative to the guide slot 112. When the detent button 113 is reset, e.g. when the detent protrusion 113a is aligned with a corresponding detent recess 121a and the detent button 113 is reset, the detent protrusion 113a can enter the corresponding detent recess 121a accordingly and block the free movement of the guide rail 121 relative to the guide slot 112, thereby selectively locking the position of the guide rail 121 relative to the guide slot 112.

[0083] It is clear to those skilled in the art that the straight movement detent configuration between the guide slot 112 and the guide rail 121 is not limited to the way as shown in the figures, and any detent design that can achieve similar functions can be adopted in the technical solution of the present application. For example, in an alternative embodiment, the detent key 113 can be designed with a detent recess, and a plurality of spaced detent protrusions can be designed on the guide rail 121 along the movement direction, so that only when the detent key 113 is in the reset state, the detent recess can receive one of the plurality of detent protrusions to lock the position of the guide rail 121 relative to the base.

[0084] According to the embodiments of the present application, the automatic reset of the detent key 113 can be achieved by a pair of magnets (hidden in the figures) arranged between the detent key 113 and the first base 110L for the seat capable of movably receiving the detent key 113. For example, the pair of magnets can be arranged in the detent key 113 and the first base 110L respectively with opposite same magnetic poles to generate a magnetic repulsion force as the automatic reset force. In this way, when the detent key 113 is pressed, an external force needs to overcome the magnetic repulsion force to make the detent protrusion 113a of the detent key 113 move within the guide slot 112. When the external force is released, the magnetic repulsion force makes the detent key 113 automatically reset and makes the detent protrusion 113a in the guide slot 112 to be in a position that can be received by the corresponding detent recess 121a. In an alternative embodiment, the pair of magnets can be arranged in the detent key 113 and the first base 110L respectively with opposite different magnetic poles to generate a magnetic attraction force as the automatic reset force. In this way, when the detent key 113 is pressed, an external force needs to overcome the magnetic attraction force to make the detent protrusion 113a of the detent key 113 move within the guide slot 112. When the external force is released, the magnetic attraction force makes the detent key 113 automatically reset and makes the detent protrusion 113a in the guide slot 112 to be in a position that can be received by the corresponding detent recess 121a. A plurality of marker numbers are provided on the surface of the first cantilever 120L, the positions of which correspond to the detent recesses 121a, and an arrow is formed on the outer surface of the detent key 113, so that the wearer of the helmet 10 can conveniently determine the current detent position of the first cantilever 120L relative to the first base 110L by identifying which marker number is aligned with the arrow.

[0085] A gear shift button 113 is also provided in the second base 110R, and multiple gear shift recesses 121a are formed in the guide rail 121 of the second cantilever 120R, which is received by the guide groove 112 of the second base 110R. The configuration of the gear shift button 113 of the second base 110R and the gear shift recesses 121a of the second cantilever 120R is the same as that of the gear shift button 113 of the first base 110L and the gear shift recesses 121a of the first cantilever 120L in the previous paragraph, and will not be described again here. In addition, the reset method of the gear shift button 113 can also be applied to the content described as for the first base 110L, and will not be described again here.

[0086] like Figure 3 , Figure 4A As shown in Figures 4B and 4B, the first swing arm 130L and the second swing arm 130R are generally arc-shaped. Furthermore, the first cantilever 120L integrally forms a receiving end 122 spaced apart from its guide rail 121, such that the receiving end 122 is configured to be connected to the pivot end 130La of the first swing arm 130L via an adjustment ring 140. Additionally, the second cantilever 120R integrally forms a receiving end 123 spaced apart from its guide rail 121, such that the receiving end 123 is configured to be connected to the pivot end 130Ra of the second swing arm 130R via a viewing angle adjustment piece 150.

[0087] According to one embodiment of this application, such as Figure 4A As shown, the receiving end 122 can be integrally formed of plastic and includes a circular disk portion 1222, a central sleeve 1221 formed at the center of the circular disk portion 1222, and an annular flange 1223 formed around the periphery of the circular disk portion 1222. According to this embodiment of the present application, the central sleeve 1221 and the annular flange 1223 each extend axially oppositely from the disk portion 1222, as shown... Figure 7B As shown, two spaced positioning holes 1224 are formed in the disc portion 1222. For example, these two positioning holes 1224 can be through holes formed radially symmetrically in the disc portion 1222 about the central axis of the central sleeve 1221.

[0088] The adjusting ring 140 has two positioning protrusions 141. These two positioning protrusions 141 are configured such that when the adjusting ring 140 contacts the receiving end 122 from the side where the central sleeve 1221 is located, the two positioning protrusions 141 can be received within the two positioning holes 1224 of the receiving end 122, respectively. This ensures that the central axis of the central hole of the adjusting ring 140 coincides with the central axis of the sleeve 1221 of the receiving end 122, and the adjusting ring 140 cannot rotate relative to the receiving end 122 about its central axis. The outer diameter of the central sleeve 1221 is smaller than the inner diameter of the central hole of the adjusting ring 140, so that when the two are in contact, the central sleeve 1221 can penetrate deeply into the central hole of the adjusting ring 140.

[0089] like Figure 4A As shown, two guide grooves 142 are formed in the adjusting ring 140 around the central hole of the adjusting ring 140. For example, these two guide grooves 142 are arc-shaped, distributed around the central axis of the central hole of the adjusting ring 140, and radially symmetrical about the central axis of the central hole of the adjusting ring 140.

[0090] Two guide protrusions 131 are formed on the pivot end 130La of the first swing arm 130L. These two guide protrusions 131 are radially symmetrical about the central axis of the central hole of the pivot end 130La, and are configured such that when the pivot end 130La of the first swing arm 130L contacts the adjusting ring 140 from the side opposite to the receiving end 122 of the first cantilever 120L, the two guide protrusions 131 can be at least partially inserted into two arcuate guide grooves 142 of the adjusting ring 140, and the central axis of the central hole of the pivot end 130La coincides with the central axis of the central hole of the adjusting ring 140. Simultaneously, the guide protrusions 131 are guided to move in the corresponding guide grooves 142 so that the pivot end 130La can rotate about the central axis of the central hole of the adjusting ring 140.

[0091] In an alternative embodiment, the guide groove 142 may be only one, distributed around the central axis of the central hole of the adjusting ring 140; in this case, the number of guide protrusions 131 that mate with the guide groove 142 as described above may also be only one.

[0092] A locking protrusion 143 is formed in the inner wall of each arc-shaped guide groove 142. A guide protrusion 131, guided to move within the corresponding guide groove 142, is configured such that, as the guide protrusion 131 moves to the locking protrusion 143 in the guide groove 142, it can be slightly deformed by compression to be pressed and locked at the locking protrusion 143. For example, the guide protrusion 131 may be recessed on the side of its inner wall facing the guide groove 142 where the locking protrusion 143 is formed, with rounded corners on both sides of the recessed recess to facilitate compression and locking at the locking protrusion 143. Figure 8As shown, two locking protrusions 143 are radially symmetrically arranged in two circular-arc-shaped guide grooves 142 with respect to the central axis of the central hole of the adjusting ring 140, so that when the first swing arm 130L is pivoted around the central axis of the adjusting ring 140 from position A as shown, through position B, and finally to position C, at position C, the two locking protrusions 143 simultaneously contact and press the two guide protrusions 131 respectively to lock the first swing arm 130L at this position C. Because the adjusting ring 140 is non-rotationally mounted relative to the first suspension arm 120L, the above process can also be understood as the first swing arm 130L being rotatable relative to the first suspension arm 120L and finally lockable at position C. If it is necessary to unlock, only a certain force needs to be applied in the reverse direction so that the guide protrusions 131 are respectively separated from the respective locking protrusions 143, and in turn can be moved from position C to position A through position B in the reverse direction.

[0093] Although the two guide grooves 142 can provide reliable support for the guidance and locking of the pivoted end 130La of the first swing arm 130L relative to the adjusting ring 140, according to an alternative embodiment of the present application, only one of the above-mentioned guide grooves 142 is formed in the adjusting ring 140.

[0094] The first subassembly 100L further comprises a knob 160L, a gasket 190, an elastic washer 180, and a nut member 170L. As shown, Figure 7B The nut member 170L comprises a central disc body 171 and a threaded sleeve 172 extending vertically from the central disc body 171. The outer surface of the threaded sleeve 172 is smooth and the inner surface is formed with internal threads. The knob 160L is provided with a threaded rod 161, and the external threads of the threaded rod 161 are designed to be screwable with the internal threads of the threaded sleeve 172. The outer diameter of the threaded sleeve 172 is designed to be smaller than the inner diameter of the central circular sleeve 1221 of the first suspension arm 120L. The outer diameter of the central disc body 171 is designed to be slightly smaller than the diameter of the annular flange 1223, so that the central disc body 171 can be accommodated in the annular flange 1223. During assembly, the elastic washer 180 and the gasket 190 are sequentially sleeved on the threaded sleeve 172, and then the threaded sleeve 172 is passed through the central circular sleeve 1221 of the first suspension arm 120L. During this process or before this process, as Figure 7BAs shown, the adjustment ring 140 can have been installed in place between the first cantilever 120L and the first swing arm 130L by inserting its two positioning protrusions 141 into the two positioning holes 1224 and inserting the guide protrusion 131 into the guide slot 142. Then, the threaded rod 161 of the knob 160L can be screwed into the threaded sleeve 172 from opposite the nut member 170L. The length of the threaded rod 161 can be designed such that when the threaded rod 161 is screwed to the closed end of the threaded sleeve 172, the first cantilever 120L, the adjustment ring 140, and the first swing arm 130L (particularly the disc portion 1222 of its receiving end 122) can be just properly clamped between the central disc body 171 of the nut member 170L and the knob 160L, while the first swing arm 130L can be rotated or locked relative to the adjustment ring 140 or the first cantilever 120L as desired. The presence of the elastic washer 180 and the spacer 190 is to ensure that there is sufficient clamping force applied between the nut member 170L and the knob 160L with which the first cantilever 120L, the adjustment ring 140, and the disc portion 1222 of the receiving end 122 of the first swing arm 130L can be properly clamped between the central disc body 171 of the nut member 170L and the knob 160L. When the first subassembly 100L is fixed in place as the left subassembly with its base 110L relative to the helmet 10, the nut member 170L is closer to the helmet 10, while the knob 160L is farther away from the helmet 10.

[0095] According to one embodiment of the present application, the free end of the threaded sleeve 172 of the nut member 170L is formed with two radially opposite grooves 173 (only one of which is visible in Figure 4A the figure). On the inner wall of the central hole of the pivot end 130La are formed two radially opposite lugs 132 (only one of which is visible in Figure 4A the figure, but both are visible in Figure 8Two lugs 132 are visible. The lugs 132 and the grooves 173 are configured such that when the threaded sleeve 172 of the nut member 170L, with the washer 190 and the elastic grommet 180, is inserted into the receiving end 122 of the first cantilever 120L, the adjusting ring 140 is formed with two positioning protrusions 141 inserted into the positioning holes 1224 of the receiving end 122, and the two guide protrusions 131 of the first swing arm 130L have been respectively guided in the two guide grooves 142 of the adjusting ring 140, the two lugs 132 of the first cantilever 120L can be exactly buckled into the two grooves 173 of the nut member 170L, thereby providing a force that can slightly hold them together. The advantage of this design is that when the threaded rod 161 of the knob 160 has not yet been screwed into the threaded sleeve 172 of the nut member 170L, the first swing arm 130L, the adjusting ring 140, the first cantilever 120L and the nut member 170L of the first subassembly 100L can be held together via the buckling of the lugs 132 and the grooves 173. In this way, it is convenient for subsequent screwing of the knob 160L. In addition, when disassembling the first subassembly 100L, the knob 160L can be unscrewed from the nut member 170L first. In this state, the first swing arm 130L, the adjusting ring 140, the first cantilever 120L and the nut member 170L slightly held together via the buckling of the lugs 132 and the grooves 173 will not immediately scatter, causing inconvenience in disassembly or assembly.

[0096] The fixed end 130Lb of the first swing arm 130L is detachably connected with the face mask 20, so that the face mask 20 is not rotatable relative to the fixed end 130Lb. It should be clear to those skilled in the art that any detachable connection that can make the face mask 20 not rotatable relative to the fixed end 130Lb of the first swing arm 130L can be used in the technical solution of the present application. Figure 4A Only one of the various possible connection modes is shown schematically and non-limitingly. According to an embodiment of the present application, the threaded column 210 is formed with a non-circular head, for example as Figure 4AThe square head portion is shown. In the fixed end portion 130Lb, a shallow groove is formed which is complementary to the shape of the head portion of the threaded post 210, so that when the threaded portion of the threaded post 210 is passed through the through hole of the fixed end portion 130Lb, the non-circular head portion of the threaded post 210 can be received in the shallow groove of the fixed end portion 130Lb, so that they cannot rotate relative to each other. Then, the first retaining tab 220 is sleeved on the threaded portion of the threaded post 210 from the side opposite to the head portion of the threaded post 210. On the surfaces of the first retaining tab 220 and the fixed end portion 130Lb which will contact each other, complementary non-circular contours are formed, so that they cannot rotate relative to each other after they contact each other. In addition, on the surface of the first retaining tab 220 opposite to the fixed end portion 130Lb, a contour is formed which is complementary to the non-circular hole (square hole in the figure) in the face shield 20, so that after the first retaining tab 220 contacts the face shield 20, the contour of the first retaining tab 220 can be received in the non-circular hole of the face shield 20, so that they cannot rotate relative to each other. In addition, the threaded portion of the threaded post 210 can pass through the fixed end portion 130Lb, the first retaining tab 220 and the face shield 20. Then, the second retaining tab 230 can be sleeved on the threaded portion of the threaded post 210 which protrudes from the face shield 20. Finally, the fixed knob 240 is screwed onto the threaded portion from the free end of the threaded portion of the threaded post 210. At the same time, as the fixed knob 240 is tightened, the face shield 20 can be fastened immovably relative to the fixed end portion 130Lb of the first swing arm 130L. In an alternative embodiment, the face shield 20 can also be fastened to the fixed end portion 130Lb of the first swing arm 130L with a fixed screw and a fixed nut, so that they cannot rotate relative to each other.

[0097] As Figure 4B shown, the fixed end portion 130Rb of the second swing arm 130R can be fixed with the face shield 20 in a similar manner as the first swing arm 130L. For this purpose, as an example only, the second subassembly 100R is provided with a threaded post 210, a first retaining tab 220, a second retaining tab 230 and a fixed knob 240 which are configured to ensure that the second swing arm 130R is detachably connected with the face shield 20 and cannot rotate relative to each other in the same fixed manner as the first swing arm 130L with the face shield 20.

[0098] The second subassembly 100R is provided with a nut member 170R, an elastic washer 180, a gasket 190, and a knob 160R, which can be configured in the same or similar manner as the nut member 170L, the elastic washer 180, the gasket 190, and the knob 160L of the first subassembly 110L. However, unlike the first subassembly 100L, an adjustment tab 150 is provided between the second swing arm 130R, in particular the pivoting end portion 130Ra thereof, and the receiving end portion 123 of the second cantilever arm 120R. The adjustment tab 150 is a one-piece component having a circular side rim 151. The side rim 151 of the adjustment tab 150 is shaped such that it can at least partially enclose a portion of the pivoting end portion 130Ra when the adjustment tab 150 is in contact with the pivoting end portion 130Ra of the second swing arm 130R.

[0099] The adjustment tab 150 is formed with a central circular hole 152 at the center of the circular side rim 151. Similar to the receiving end portion 122 of the first cantilever arm 120L, the receiving end portion 123 of the second cantilever arm 120R comprises a circular disc portion 1232, a central circular sleeve 1231 formed at the center of the circular disc portion 1232, and an annular flange 1233 formed around the periphery of the circular disc portion 1232, as shown in Figure 7A The diameter of the central circular hole 152 of the adjustment tab 150 is larger than the outer diameter of the central circular sleeve 1231 of the receiving end portion 123. Thus, as shown in Figure 7A the adjustment tab 150 can be sandwiched between the receiving end portion 123 of the second cantilever arm 120R and the pivoting end portion 130Ra of the second swing arm 130R, such that the central circular sleeve 1231 at least partially extends into the central circular hole 152 of the adjustment tab 150.

[0100] The adjustment tab 150 comprises a sector 153 extending radially outwardly from a portion of the outer periphery of the annular flange 1233. A plurality of (six in the figure) detent holes 154 are formed in the sector 153. When the adjustment tab 150 is sandwiched between the receiving end portion 123 of the second cantilever arm 120R and the pivoting end portion 130Ra of the second swing arm 130R, the sector 153 is generally perpendicular to the central axes of the coaxial central circular sleeve 1231 and central circular hole 152. The plurality of detent holes 154 are distributed equidistantly from each other in an (imaginary) circular arc around the center of the circular side rim 151 in the sector 153. Furthermore, at least one detent bump 125 is provided on the surface of the second cantilever arm 120R, for example Figure 4BThe second suspension arm 120R is provided with a plurality of gear bumps 125. The gear bumps 125 are shown as two in the figure. The gear bumps 125 slightly protrude from the surface of the second suspension arm 120R, and the surface is the surface that faces or contacts the sector 153 of the adjustment sheet 150 when the adjustment sheet 150 is interposed between the receiving end portion 123 of the second suspension arm 120R and the pivoting end portion 130Ra of the second swing arm 130R. The gear bumps 125 are configured to be located within a segment (imaginary) circular arc that is concentric with the central axis of the central circular sleeve 1231. Therefore, when the adjustment sheet 150 is interposed between the receiving end portion 123 of the second suspension arm 120R and the pivoting end portion 130Ra of the second swing arm 130R, the (imaginary) circular arc of the surface of the second suspension arm 120R is concentric and at least partially coincides with the (imaginary) circular arc of the sector 153. The gear bumps 125 are configured to be received into the corresponding gear holes 154. That is, when the adjustment sheet 150 is interposed between the receiving end portion 123 of the second suspension arm 120R and the pivoting end portion 130Ra of the second swing arm 130R, by causing a selected gear hole 154 of the plurality of gear holes 154 to receive the gear bump 125, the angular position of the adjustment sheet 150 relative to the second swing arm 130R can be adjusted. In this way, after the angular position of the adjustment sheet 150 relative to the second swing arm 130R is fixed due to the gear bump 125 within the corresponding gear hole 154, the second swing arm 130R can be pivoted relative to the adjustment sheet 150 or the second suspension arm 120R.

[0101] Referring to Figure 4B and 10 A circular arc-shaped guide groove 155 is formed in the adjustment sheet 150 around the center of the central circular hole 152. The center of the arc of the guide groove 155 coincides with the center of the central circular hole 152. According to an embodiment of the present application, the guide groove 155 can be formed as a shallow groove in the surface of the adjustment sheet 150 facing the second swing arm 130R without penetrating the adjustment sheet 150. A guide protrusion 131 is formed on the surface of the pivoting end portion 130Ra of the second swing arm 130R (facing the adjustment sheet 150 when assembled). When the adjustment sheet 150 is interposed between the receiving end portion 123 of the second suspension arm 120R and the pivoting end portion 130Ra of the second swing arm 130R, the guide protrusion 131 is located within the guide groove 155 and can guide the rotational movement of the second swing arm 130R relative to the adjustment sheet 150 or the second suspension arm 120R.

[0102] The nut member 170R, the elastic washer 180, the gasket 190, and the knob 160R can be configured such that, when the nut member 170R is screwed onto the threaded hole 121 of the second suspension arm 120R as shown in FIG. 6, the knob 160R is located on the surface of the second suspension arm 120R facing the second swing arm 130R. Figure 7AAfter the knob 160R is screwed onto the nut member 170R as shown, similar to the screwing of the knob 160L onto the nut member 170L, sufficient clamping force is applied between the nut member 170R and the knob 160R, by which the receiving end 123 of the second cantilever 120R, the adjusting piece 150, and the second swing arm 130R can be clamped between the center disc 171 of the nut member 170R and the knob 160R. At the same time, the second swing arm 130R can be pivoted relative to the adjusting piece 150 as needed.

[0103] Two grooves 173 are formed on the free end of the threaded sleeve of the nut member 170R, and two lugs 132 are formed on the inner wall of the center hole of the pivoting end 130Ra of the second swing arm 130R, which are configured to be able to be mutually engaged with each other similar to the grooves 173 of the nut member 170L and the lugs of the first swing arm 130L, so as to ensure that when the knob 160R has not yet been screwed onto the nut member 170R, the second swing arm 130R, the adjusting piece 150, the second cantilever 120R, and the nut member 170R can be kept together without being immediately scattered, causing inconvenience in disassembly or assembly.

[0104] The assembled first subassembly 100L and the second subassembly 100R are as shown in Figure 3 When the two subassemblies 100L, 100R are fixed in place relative to the helmet 10 by the respective bases 110L, 110R, the first swing arm 130L and the second swing arm 130R can be pivoted relative to the first cantilever 120L and the second cantilever 120R about the same center axis. Therefore, when the face shield 20 is non-rotatably connected to the first subassembly 100L and the second subassembly 100R, the face shield 20 can be switched between the shielding position as shown in Figure 1 and the raised position as shown in Figure 2 by driving the face shield 20 about the center axis. The guide groove 142 of the adjusting ring 140, the guide protrusion 131 of the first swing arm 130L, the guide groove 155 of the adjusting piece 150, and the guide protrusion 131 of the second swing arm 130R are configured not to affect the free switching of the face shield 20 between the shielding position and the raised position.

[0105] In the assembled state of the second sub-assembly 100R, by slightly prying up the fan blade 153 of the adjusting plate 150 so that its multiple stop holes 154 do not receive the stop protrusions 125, the adjusting plate 150 can be slightly pivoted relative to the second cantilever 120R. Then, by releasing the fan blade 153 of the adjusting plate 150, it comes into contact with the second cantilever 120R again, and the stop protrusions 125 are received in the different stop holes 154, thereby adjusting the angular position of the adjusting plate 150 relative to the second cantilever 120R. To facilitate prying up the fan blade 153 of the adjusting plate 150 and adjusting its angular position relative to the second cantilever 120R, a curved portion suitable for finger contact is formed at the edge of the fan blade 153. For example, this curved portion is away from the second cantilever 120R in the assembled state of the second sub-assembly 100R, thereby facilitating finger access to the fan blade 153 for angular position adjustment.

[0106] Figure 11A It shows in Figure 1 Adjustment piece 150 (viewed vertically outward from within the view) Figure 1 The text is hidden; see below. Figure 4B and 8 ), guide protrusion 131 of the second swing arm 130R ( Figure 1 The text is hidden; see below. Figure 9 ), and the shifting protrusion 125 of the second cantilever 120R ( Figure 1 The text is hidden; see below. Figure 4B The relationship between the mask 20 and the mask 20 is in its covering position.

[0107] Figure 11B It shows in Figure 1 Adjustment ring 140 (viewed vertically outward from inside the view) Figure 1 The text is hidden; see below. Figure 4A and 8 ) and the guide protrusion 131 of the first swing arm 130L ( Figure 1 The text is hidden; see below. Figure 4A and 8 The relationship between the mask 20 and the mask 20 is in its covering position.

[0108] When the face mask 20 is in its obstructed position, the guide protrusion 131 of the first swing arm 130L is in an unobstructed position within the guide groove 142 of the adjusting ring 140, but the guide protrusion 131 of the second swing arm 130R abuts against the end of the guide groove 155 of the adjusting piece 150. This is because when the face mask 20 is in its obstructed position, under the weight of the face mask 20, the second swing arm 130R tends to rotate towards the front of the helmet 10 (i.e., in...). Figure 11A(The rotation tends to be clockwise). Only when the guide protrusion 131 of the second swing arm 130R abuts against the end of the guide groove 155 of the adjusting plate 150 can the second swing arm 130R be restrained from rotating relative to the second swing arm 130L or the helmet 10, thereby ensuring that the mask 20 remains stationary in its obstructed position.

[0109] Figure 12A It shows in Figure 1 Adjustment piece 150 (viewed vertically outward from within the view) Figure 1 The text is hidden; see below. Figure 4B and 8 ), guide protrusion 131 of the second swing arm 130R ( Figure 1 The text is hidden; see below. Figure 9 ), and the shifting protrusion 125 of the second cantilever 120R ( Figure 1 The text is hidden; see below. Figure 4B The relationship between the two is such that the mask 20 is in its flipped-up position.

[0110] Figure 12B It shows in Figure 1 Adjustment ring 140 (viewed vertically outward from inside the view) Figure 1 The text is hidden; see below. Figure 4A and 8 ) and the guide protrusion 131 of the first swing arm 130L ( Figure 1 The text is hidden; see below. Figure 4A and 8 The relationship between the two is such that the mask 20 is in its flipped-up position.

[0111] With the mask 20 from its like Figure 1 The occlusion position shown is switched to its position as shown. Figure 2 As shown in the flipped-up position, the guide protrusion 131 of the second swing arm 130R moves from the end of the guide groove 155 within the guide groove 155 to a position where it is unobstructed, and the guide protrusion 131 of the first swing arm 130L moves within the guide groove 142 of the adjusting ring 140 to a position where it is pressed and locked against the locking protrusion 143. In this way, even if the mask 20 is heavy, it can be held in place as shown in the figure. Figure 2 The raised position shown allows the wearer of helmet 10 to easily observe the outside world with their naked eyes.

[0112] As can be seen from the embodiments of this application, the obstruction position of the face mask 20 relative to the helmet 10 is achieved by the guide protrusion 131 of the second swing arm 130R being blocked within the guide groove 155 of the adjusting plate 150; the raised position of the face mask 20 relative to the helmet 10 is achieved by the guide protrusion 131 of the first swing arm 130L being locked and pressed by the locking protrusion 143 within the guide groove 142 of the adjusting ring 140. Simultaneously, because the first cantilever 120L and the second cantilever 120R can move linearly relative to the first base 110L and the second base 110R respectively, the face mask 20 can also selectively move back and forth relative to the helmet 10 to facilitate adjustment of the distance between the face mask 20 and the wearer's face when obstructing the helmet 10 and / or the distance between the face mask 20 and the wearer's helmet 10 when in the raised position.

[0113] It should be noted that when the face mask 20 is in an obstructed position relative to the helmet 10, the viewing angle of the face mask 20 may not be satisfactory, or the wearer's line of sight may not be able to properly observe outwards through the viewing window 21 of the face mask 20. For the context of this application, the viewing angle of the face mask 20 is defined as the angular position of the face mask 20 relative to the helmet 10 or, in other words, relative to the adapter 100, when the face mask 20 is in an obstructed position relative to the helmet 10. According to an embodiment of this application, the selective engagement of the stop hole 154 of the adjusting plate 150 with the stop protrusion 125 of the second cantilever 120R is designed to adjust the viewing angle of the face mask 20. According to an embodiment of this application, because the angular position of the adjusting plate 150 relative to the second cantilever 120R can be adjusted, the angular position of the guide groove 155 in the adjusting plate 150 relative to the central axis of the central sleeve 1231 of the receiving end 123 of the second cantilever 120R can also be adjusted. Thus, the viewing angle of the face mask 20 (when it is in an obstructed position relative to the helmet 10) can also be adjusted accordingly.

[0114] Figure 13A It shows in Figure 1 Adjustment piece 150 (viewed vertically outward from within the view) Figure 1 The text is hidden; see below. Figure 4B and 8 ), guide protrusion 131 of the second swing arm 130R ( Figure 1 The text is hidden; see below. Figure 9 ), and the shifting protrusion 125 of the second cantilever 120R ( Figure 1 The text is hidden; see below. Figure 4B The relationship between the mask 20 and the second cantilever 120R is such that the stop protrusion 125 is adjusted to be in the position of the mask 20 in its obstructed position, but the stop protrusion 125 is adjusted to be in the position of the second cantilever 120R in relation to the mask 20 in its obstructed position. Figure 11A The different adjustment plates 150 are shown in the stop hole 154.

[0115] Figure 13B It shows inFigure 1 Adjustment ring 140 (viewed vertically outward from inside the view) Figure 1 The text is hidden; see below. Figure 4A and 8 ) and the guide protrusion 131 of the first swing arm 130L ( Figure 1 The text is hidden; see below. Figure 4A and 8 The relationship between the mask 20 and the second cantilever 120R is such that the stop protrusion 125 is adjusted to be in the position of the mask 20 in its obstructed position, but the stop protrusion 125 is adjusted to be in the position of the second cantilever 120R in relation to the mask 20 in its obstructed position. Figure 11A The different adjustment plates 150 are shown in the stop hole 154.

[0116] Figure 14A It shows in Figure 1 Adjustment piece 150 (viewed vertically outward from within the view) Figure 1 The text is hidden; see below. Figure 4B and 8 ), guide protrusion 131 of the second swing arm 130R ( Figure 1 The text is hidden; see below. Figure 9 ), and the shifting protrusion 125 of the second cantilever 120R ( Figure 1 The text is hidden; see below. Figure 4B The relationship between the mask 20 and the second cantilever 120R is such that the stop protrusion 125 is adjusted to be in the same position as the mask 20 is in its raised position. Figure 11A The different adjustment plates 150 are shown in the stop hole 154.

[0117] Figure 14B It shows in Figure 1 Adjustment ring 140 (viewed vertically outward from inside the view) Figure 1 The text is hidden; see below. Figure 4A and 8 ) and the guide protrusion 131 of the first swing arm 130L ( Figure 1 The text is hidden; see below. Figure 4A and 8 The relationship between the mask 20 and the second cantilever 120R is such that the stop protrusion 125 is adjusted to be in the same position as the mask 20 is in its raised position. Figure 11A The different adjustment plates 150 are shown in the stop hole 154.

[0118] By comparison Figure 11A and Figure 13AIt can be found that the adjusting piece 150 is rotated counterclockwise by two gear hole 154 angles relative to the second suspension arm 120R, so that the gear block 125 of the second suspension arm 120R is adjusted to engage with the middle two gear holes 154 of the six gear holes 154 of the adjusting piece 150. Thus, the angular position of the adjusting piece 150 relative to the second suspension arm 120R also changes accordingly, or the angular position of the guide groove 155 of the adjusting piece 150 about the central axis of the center circular sleeve 1231 of the second suspension arm 120R also changes accordingly. In this way, when the mask 20 is in the shielding position, the angular position of the guide protrusion 131 of the second swing arm 130R at the end of the guide groove 155 of the adjusting piece 150 which is blocked by it also changes, so that it can be ensured that the viewing angle of the mask 20 relative to the second suspension arm 120R is adjusted. Figure 11A

[0119] According to one embodiment of the present application, as shown in Figs. Figure 4B 、 9 and 10, a pair of metal corrugated pieces 310 and 320 are arranged between the adjusting piece 150 and the pivoting end 130Ra of the second swing arm 130R, so that when the second swing arm 130R is pivoted relative to the adjusting piece 150 or relative to the second suspension arm 120R, the pair of metal corrugated pieces 310 and 320 rub against each other to produce a "click" sound. In this way, when the mask 20 is switched between its shielding position and its raised position, the user can be reminded. For example, the body of the metal corrugated piece 310 is substantially arc-shaped, and a clamping strip (for example, 2 are shown in the figure) is formed at the edge of the body of the metal corrugated piece 310, so as to be detachably clamped and fixed into the surface of the adjusting piece 150 which forms the guide groove 155, as shown in Figure 10 . The arc-shaped body of the metal corrugated piece 310 is concentric with the guide groove 155. Similarly, the body of the metal corrugated piece 320 is substantially arc-shaped, and a clamping strip (for example, 3 are shown in the figure) is formed at the edge of the body of the metal corrugated piece 320, so as to be detachably clamped and fixed into the surface of the pivoting end 130Ra of the second swing arm 130R which forms the guide protrusion 131.

[0120] It needs to be clear that the configurations of the first subassembly 100L and the second subassembly 100R described above can be interchangeable with each other. For example, the configuration contents related to the second swing arm 130R, the adjusting piece 150 and the second suspension arm 120R can be applied to the first subassembly 100L, and the configuration contents related to the first swing arm 130L, the adjusting ring 140 and the first suspension arm 120R can be applied to the second subassembly 100R.

[0121] Figure 15 ​A portion of a sub-assembly according to another embodiment of the application is schematically shown. For example, the shown sub-assembly can be either one of the two sub-assemblies of the adapter or both. In the shown embodiment, the sub-assembly is shown as an example of a right sub-assembly 100R' to be mounted on the right side of the helmet 10; however, it will be clear to the skilled person that what is described below in relation to the right sub-assembly 100R' applies equally to the left sub-assembly of the adapter (not shown in Figure 15 ). For the sake of clarity, only a portion of the right sub-assembly 100R' is shown in Figure 15 , it will be clear to the skilled person that further components required for the assembly of the right sub-assembly 100R can be referred to the content of Figure 4B . In addition, those features in Figure 15 that adopt the same reference numerals as in Figure 4A or 4B can be referred to the relevant description of Figure 4A or Figure 4B .

[0122] According to the embodiment as shown in Figure 15 , the sub-assembly 100R' comprises an adjustment tab 150'. The adjustment tab 150' is a one-piece component having a circular side edge 151. The side edge 151 of the adjustment tab 150' is shaped so that, when the adjustment tab 150 is in contact with the pivoting end 130Ra' of the swing arm 130R' of the sub-assembly 100R', the side edge 151 can at least partially enclose a portion of the pivoting end 130Ra'.

[0123] The adjustment tab 150' is formed with a central circular hole 152 at the center of the circular side edge 151. The receiving end 123 of the cantilever arm 120R of the sub-assembly 100R' comprises a circular disc portion 1232, a central circular sleeve 1231 formed at the center of the circular disc portion 1232, and an annular flange 1233 formed around the periphery of the circular disc portion 1232. The diameter of the central circular hole 152 of the adjustment tab 150' is greater than the outer diameter of the central circular sleeve 1231 of the receiving end 123. Therefore, the adjustment tab 150' can be sandwiched between the receiving end 123 of the cantilever arm 120R and the pivoting end 130Ra' of the swing arm 130R' so that the central circular sleeve 1231 at least partially extends into the central circular hole 152 of the adjustment tab 150'.

[0124] The adjusting plate 150' includes a fan 153 extending radially outward from a portion of the outer periphery of its circular side edge 151. A plurality of (six in the figure) stop holes 154 are formed in the fan 153. When the adjusting plate 150 is clamped between the receiving end 123 of the cantilever 120R and the pivoting end 130Ra of the swing arm 130R', the fan 153 is substantially perpendicular to the central axis of the coaxial central sleeve 1231 and the central circular hole 152. The plurality of stop holes 154 are equidistantly distributed in the fan 153 within an (imaginary) arc surrounding the center of the circular side edge 151. Furthermore, stop protrusions 125 are provided on the surface of the cantilever 120R, for example... Figure 15 Two stop protrusions 125 are shown. The stop protrusions 125 extend slightly from the surface of the cantilever 120R, and this surface is the surface facing or contacting the blade 153 of the adjusting plate 150 when the adjusting plate 150 is sandwiched between the receiving end 123 of the cantilever 120R and the pivoting end 130Ra of the swing arm 130R'. The stop protrusions 125 are configured to lie within an imaginary arc concentric with the central axis of the central sleeve 1231. Therefore, when the adjusting plate 150' is sandwiched between the receiving end 123 of the cantilever 120R and the pivoting end 130Ra' of the swing arm 130R', the imaginary arc of the surface of the cantilever 120R is concentric with and at least partially coincides with the imaginary arc of the blade 153. The stop protrusions 125 are configured to be received into corresponding stop holes 154. In other words, when the adjusting piece 150' is sandwiched between the receiving end 123 of the cantilever 120R and the pivoting end 130Ra' of the swing arm 130R', the angular position of the adjusting piece 150' relative to the swing arm 130R' can be adjusted by having a selected stop hole 154 among the plurality of stop holes 154 receive a stop protrusion 125. Thus, when the angular position of the adjusting piece 150' relative to the swing arm 130R' is fixed by the stop protrusion 125 within the corresponding stop hole 154, the swing arm 130R' can be pivoted relative to the adjusting piece 150' or, in other words, relative to the cantilever 120R.

[0125] With Figure 4B Unlike the adjustment piece 150 shown, an arc-shaped guide groove 142 is formed in the adjustment piece 150' with its central circular hole 152 as the center. For example, this guide groove 142 can penetrate the adjustment piece 150'. A guide protrusion 131 is formed in the face of the pivot end 130Ra' of the swing arm 130R' that faces the guide groove 142. In addition, a locking protrusion 143 is formed in the inner wall of the guide groove 142.

[0126] Once the adjusting plate 150' is positioned between the receiving end 123 and the swing arm 130R', the corresponding two stop holes 154 of the adjusting plate 150' can receive the two stop protrusions 125 of the cantilever 120R, thus preventing the adjusting plate 150' from pivoting relative to the cantilever 120R. Additionally, once the adjusting plate 150' is positioned between the receiving end 123 and the swing arm 130R', the guide protrusion 131 of the swing arm 130R' can extend into the guide groove 142 of the adjusting plate 150', and as the swing arm 130R' pivots relative to the adjusting plate 150' or the cantilever 120R, the guide protrusion 131 moves within the guide groove 142.

[0127] Figure 16A and 16B This is a perspective view, schematically showing the swing arm 130R' and the adjusting plate 150', in which it can be imagined that the mask 20 (not shown) is immovably connected to the fixed end 130Rb of the swing arm 130R' (in the manner shown). Figure 4B As shown), in which, one can imagine, in Figure 16A In the middle, the angular position of the swing arm 130R' relative to the adjusting plate 150' (at which the guide protrusion 131 of the swing arm 130' abuts against its end within the guide groove 142) ensures that the mask 20 is securely held in its obstructed position; in Figure 16B In this position, the angular position of the swing arm 130R' relative to the adjustment plate 150' (in which the guide protrusion 131 of the swing arm 130' is pressed and locked in the guide groove 142 at the locking protrusion 143) ensures that the mask 20 is securely held in its raised position.

[0128] By having different ones of the plurality of detent holes 154 of the adjustment tab 150' selectively receive the detent bump 125 of the boom 120R, the angle of the swing arm 130R' relative to the boom 120R when the guide protrusion 131 of the swing arm 130' abuts an end of the guide slot 142 or the guide protrusion 131 of the swing arm 130' is pinched at the locking bump 143 within the guide slot 142 can be changed. By way of a non-limiting example only, the angle of the swing arm relative to the boom can be defined, for example, as the included angle between the longitudinal extension direction of the swing arm (e.g. the direction of the line connecting the centers of the two ends 130Ra', 130Rb) and the longitudinal extension direction of the rail 121 of the boom, as viewed in a plane perpendicular to the common pivot axis of the two. By way of another non-limiting example, the angle of the swing arm relative to the boom can also be defined, for example, as the angle between the longitudinal extension direction of the swing arm (e.g. the direction of the line connecting the centers of the two ends 130Ra', 130Rb) and a straight line from the pivot axis to a fixed point within the boom, as viewed in a plane perpendicular to the common pivot axis of the two. According to the technical solution of the present application, the viewing angle of the visor 20 when it is in the shielding position relative to the helmet 10 can be adjusted by changing the included angle of the swing arm relative to the boom.

[0129] According to one embodiment of the present application, the other subassembly of the adapter can be arranged in a mirror-symmetrical manner to the subassembly 100R' as shown. According to an alternative embodiment of the present application, the other subassembly of the adapter can also be arranged without the adjustment tab and its related features, and the boom and the swing arm are only arranged to be freely pivotably connected, so that the lifting position, the shielding position and the viewing angle adjustment of the shielding position of the helmet connected to the adapter are ensured by the subassembly 100R' as shown. Figure 15

[0130] Although specific embodiments of the present application are described in detail herein, many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing detailed description. The various embodiments described herein can be used alone or in combination with one another. Other and many variations of the present application will be apparent to those having ordinary skill in the art upon reading and understanding this description.​

Claims

1. An adapter for connecting a visor to a helmet, comprising a first sub-assembly (100L) and a second sub-assembly (100R or 100R'), each of the first sub-assembly (100L) and the second sub-assembly (100R or 100R') comprises a base, a cantilever arm selectively linearly movable and non-rotatably mounted with respect to the base, and a swing arm having a pivoting end portion pivotally connected with the cantilever arm and an opposite fixed end portion configured to be non-rotatably connected with the visor, each of the bases is configured to be detachably connected to the helmet, the first sub-assembly (100L) and / or the second sub-assembly (100R or 100R') further comprises an adjustment device interposed between the respective cantilever arm and the pivoting end portion of the respective swing arm, the adjustment device is configured to constrain the swing arm to be pivotable only between a first pivoting angle of the swing arm with respect to the adjustment device and a second pivoting angle of the swing arm with respect to the adjustment device, and the adjustment device is further configured to be adjustable in an angular position thereof with respect to the cantilever arm, the adjustment device comprises an adjustment ring (140) interposed between the cantilever arm of the first sub-assembly (100L) and the swing arm of the first sub-assembly (100L), the adjustment ring (140) is non-pivotably mounted with respect to the cantilever arm of the first sub-assembly (100L), the adjustment ring is configured to define one of the first pivoting angle and the second pivoting angle; the adjustment device further comprises a view angle adjustment tab (150) interposed between the cantilever arm of the second sub-assembly (100R or 100R') and the swing arm of the second sub-assembly (100R or 100R'), the view angle adjustment tab (150) is configured to define the other one of the first pivoting angle and the second pivoting angle, and the angular position of the view angle adjustment tab (150) with respect to the cantilever arm of the second sub-assembly (100R or 100R') is selectively lockable.

2. The adapter of claim 1, wherein, the view angle adjustment tab (150) is formed with a plurality of detent holes (154) spaced apart within a circular arc coaxial with a pivoting axis of the swing arm of the second sub-assembly (100R or 100R') with respect to the view angle adjustment tab (150), and a detent bump (125) is formed on a surface of the cantilever arm of the second sub-assembly (100R or 100R'), the detent bump (125) is configured to be received into a selected one of the plurality of detent holes (154) to make the view angle adjustment tab (150) non-rotatable with respect to the cantilever arm of the second sub-assembly (100R or 100R').

3. The adapter of claim 2, wherein, a guide groove (142) is formed in the adjustment ring (140), the guide groove (142) is circular arc-shaped and an arc center of the circular arc coincides with a pivoting axis of the swing arm of the first sub-assembly (100L) with respect to the adjustment ring (140), A guide protrusion (131) is formed on the pivoted end of the swing arm of the first subassembly (100L), which protrudes at least partially into the guide slot (142) and moves within the guide slot (142) as the pivoted end of the swing arm of the first subassembly (100L) pivots relative to the adjustment ring (140), A locking protrusion (143) is formed in the guide slot (142) of the adjustment ring (140), and one of the first and second pivot angles is defined only when the locking protrusion (143) contacts and presses the guide protrusion (131).

4. The adapter of claim 3, wherein, A guide slot (155) is formed in the view angle adjusting piece (150), which is circular arc-shaped and the center of the circular arc coincides with the pivot axis of the swing arm of the second subassembly (100R or 100R´) relative to the view angle adjusting piece (150), A guide protrusion (131) is formed in the pivoted end of the swing arm of the second subassembly (100R or 100R´), which protrudes at least partially into the guide slot (155) and moves within the guide slot (155) as the pivoted end of the swing arm of the second subassembly (100R or 100R´) pivots relative to the view angle adjusting piece (150), and the other of the first and second pivot angles is defined only when the guide protrusion (131) of the pivoted end of the swing arm of the second subassembly (100R or 100R´) is blocked in the guide slot (155).

5. The adapter of claim 4, wherein, The other of the first and second pivot angles is defined only when the guide protrusion (131) of the pivoted end of the swing arm of the second subassembly (100R or 100R´) is blocked by the end of the guide slot (155).

6. The adapter of claim 5, wherein, The number of the stop blocks (125) formed on the surface of the cantilever of the second subassembly (100R or 100R´) is at least one and less than the number of the stop holes (154).

7. The adapter of claim 3, wherein, The number of the guide slots (142) formed in the adjustment ring (140) is one or two, and the guide slots (142) are distributed about the pivot axis of the adjustment ring (140) relative to the swing arm of the first subassembly (100L), The number of the guide protrusions (131) formed on the pivoted end of the swing arm of the first subassembly (100L) is one or two, and the one or two guide protrusions (131) protrude at least partially into the corresponding guide slot (142), The first and second pivot angles are defined only when the locking protrusion (143) of each guide slot (142) contacts and presses the corresponding guide protrusion (131).

8. The adapter of claim 1, wherein, The adjusting device comprises a view angle adjusting piece (150') interposed between the cantilever of the first subassembly (100L) and the swing arm of the first subassembly (100L) and / or interposed between the cantilever of the second subassembly (100R or 100R') and the swing arm of the second subassembly (100R or 100R'), The view angle adjusting piece (150') is configured to define both the first pivot angle and the second pivot angle, and the angle position of the view angle adjusting piece (150') relative to the cantilever of the first subassembly (100L) and / or the cantilever of the second subassembly (100R) can be selectively locked.

9. The adapter of claim 8, wherein, The view angle adjusting piece (150') is formed with a plurality of gear holes (154) which are spaced apart within a circular arc coaxial with the pivot axis of the swing arm of the first subassembly (100L) and / or the swing arm of the second subassembly (100R or 100R'), and a gear bump (125) is formed on the surface of the cantilever of the first subassembly (100L) and / or the second subassembly (100R or 100R'), which is configured to be received into a selected gear hole (154) among the plurality of gear holes (154) to make the view angle adjusting piece (150') unable to rotate relative to the cantilever of the first subassembly (100L) and / or the second subassembly (100R or 100R').

10. The adapter of claim 9, wherein, A guide groove (142) is formed in the view angle adjusting piece (150'), which is circular arc-shaped and the center of the circular arc coincides with the pivot axis of the swing arm of the first subassembly (100L) and / or the swing arm of the second subassembly (100R or 100R') relative to the view angle adjusting piece (150'), A guide protrusion (131) is formed on the pivot end of the swing arm of the first subassembly (100L) and / or the second subassembly (100R or 100R'), which at least partially extends into the guide groove (142) and moves within the guide groove (142) as the pivot end of the swing arm of the first subassembly (100L) and / or the second subassembly (100R or 100R') pivots relative to the adjusting ring (140), A locking bump (143) is formed in the guide groove (142) of the adjusting ring (140), and only when the locking bump (143) contacts and presses the guide protrusion (131), one of the first pivot angle and the second pivot angle is defined.

11. The adapter of claim 10, wherein, Only when the guide protrusion (131) is blocked at a position other than the guide protrusion (131) within the guide groove (142), the other of the first pivot angle and the second pivot angle is defined.

12. The adapter of claim 11, wherein, The other one of the first and second pivot angles is defined only when the guide protrusion (131) is blocked by an end of the guide slot (142) within the guide slot (142), wherein the end is opposite to the locking bump (143) within the guide slot (142).

13. The adapter of claim 12, wherein, At least one detent bump (125) is formed on a surface of the cantilever of the first subassembly (100L) and / or the second subassembly (100R or 100R´), and the number of the detent bump (125) is less than the number of the detent hole (154).

14. The adapter of any one of claims 1 to 7, wherein, A pair of metal corrugated sheets (310, 320) is arranged between the view angle adjusting sheet (150) and the pivoted end of the swing arm of the second subassembly (100R or 100R´), and the pair of metal corrugated sheets (310, 320) is configured to rub against each other to generate a prompt sound when the pivoted end of the swing arm of the second subassembly (100R or 100R´) is pivoted relative to the view angle adjusting sheet (150).

15. The adapter of any one of claims 8 to 13, wherein, A pair of metal corrugated sheets (310, 320) is arranged between the view angle adjusting sheet (150´) and the pivoted end of the swing arm of the first subassembly (100L) and / or the second subassembly (100R or 100R´), and the pair of metal corrugated sheets (310, 320) is configured to rub against each other to generate a prompt sound when the pivoted end of the swing arm of the second subassembly (100R or 100R´) is pivoted relative to the view angle adjusting sheet (150).

16. The adapter of any one of claims 1 to 13, wherein, The cantilever includes a straightly extending guide rail (121), at least a portion of which is received by the base, and a detent button (113) is further arranged in the base to selectively lock the guide rail (121) at different positions relative to the base.

17. The adapter of claim 16, wherein, The detent button (113) is configured to enable the guide rail (121) to freely move relative to the base when the detent button (113) is only pressed, and to be reset via a reset force to lock the guide rail (121) at a position relative to the base when the detent button (113) is not pressed.

18. The adapter of claim 17, wherein, The reset force is generated by a pair of magnets arranged between the detent button (113) and a receptacle of the base for movably receiving the detent button (113).

19. The adapter of claim 18, wherein, The reset force is generated via a pair of magnets arranged with same-polarity magnetic poles in opposite arrangement to generate a magnetic repulsion force, or the reset force is generated via a pair of magnets arranged with opposite-polarity magnetic poles in opposite arrangement to generate a magnetic attraction force.

20. The adapter of claim 1, wherein, Each of the first subassembly (100L) and the second subassembly (100R or 100R´) further includes: a knob (160L or 160R) provided with a threaded rod (161); and a nut member (170L or 170R) provided with a threaded sleeve (172) configured to be screwed with the threaded rod (161) of the knob (160L or 160R) after passing through the pivoted end, the adjusting device and the cantilever to define a pivot axis of the pivoted end relative to the cantilever.

21. The adapter of claim 20, wherein, Two radially opposite lugs (132) are formed on the inner wall of the central hole of the pivot end, two radially opposite recesses (173) are formed on the end of the threaded sleeve (172) of the nut member (170L or 170R) inserted into the central hole, the lugs (132) and the recesses (173) are configured such that when the threaded sleeve (172) has not been screwed with the threaded rod (161), the two lugs (132) can be respectively buckled into the two recesses (173) to hold the pivot end, the adjusting device, the cantilever and the nut member (170L or 170R) together.

22. A visor and helmet assembly comprising: a helmet (10); a visor (20); and an adapter according to any one of claims 1 to 21, wherein the helmet (10) is connected with the visor via the adapter such that the swing arms of the first sub-assembly (100L) and the second sub-assembly (100R or 100R') of the adapter are pivotable about the same axis relative to the respective cantilever, the swing arms of the adapter being at a first pivot angle relative to the adjusting device of the adapter when the visor (20) is in a shielding position relative to the helmet (10); the swing arms of the adapter being at a second pivot angle relative to the adjusting device of the adapter when the visor (20) is locked to a raised position relative to the helmet (10). ​

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