阅读说明：本技术 一种下巴护罩与面罩关联转动的头盔 (Helmet with chin shield and mask rotating in association ) 是由 徐程浩 于 2020-12-11 设计创作，主要内容包括：本发明公开了一种下巴护罩与面罩关联转动的头盔,包括头盔主体,在头盔主体侧面安装槽对称地铰接有面罩和下巴护罩,在安装槽内安装有面罩转动限位件、面罩安装件、与面罩安装件连接的联动引导环形件、与联动引导环形件上的环形槽配合的驱动杆、与驱动杆通过铰接件连接的下巴护罩安装件以及夹持在驱动杆与下巴护罩安装件之间的下巴护罩转动引导件,在下巴护罩转动引导件上设有引导下巴护罩转动的双轨道引导槽,设置在驱动杆两端的铰接件分别穿过双轨道引导槽与下巴护罩安装件连接,其中面罩转动限位件通过连接件安装在安装槽上,联动引导环形件通过第一转轴与下巴护罩转动引导件铰接,下巴转动引导件通过连接件与安装槽连接。(The invention discloses a helmet with a chin guard and a mask which are connected to rotate, comprising a helmet main body, wherein the side surface of the helmet main body is symmetrically hinged with the mask and the chin guard in an installation groove, a mask rotation limiting part, a mask installation part, a linkage guide ring part connected with the mask installation part, a driving rod matched with an annular groove on the linkage guide ring part, the chin guard installation part connected with the driving rod through a hinge part and a chin guard rotation guide part clamped between the driving rod and the chin guard installation part are arranged in the installation groove, a double-track guide groove for guiding the chin guard to rotate is arranged on the chin guard rotation guide part, the hinge parts arranged at the two ends of the driving rod respectively penetrate through the double-track guide groove and are connected with the chin guard installation part, the mask rotation limiting part is arranged on the installation groove through a connecting part, the linkage guide ring part is hinged with the chin, the jaw rotation guide is connected with the mounting groove through a connecting piece.)

1. A helmet with a chin guard and a face shield which are connected to rotate is characterized by comprising a helmet main body, the side surface of the helmet main body is symmetrically hinged with the face shield and the chin guard through a connecting assembly, mounting grooves of the connecting assembly are symmetrically formed in two sides of the helmet main body, a face shield rotation limiting part in the connecting assembly, a face shield mounting part, a linkage guide ring part connected with the face shield mounting part, a driving rod matched with an annular groove in the linkage guide ring part, a chin guard mounting part connected with the driving rod through a hinge part and a chin guard rotation guide part clamped between the driving rod and the chin guard mounting part are mounted in the mounting grooves respectively, double-track guide grooves for guiding the rotation of the chin guard are formed in the chin guard rotation guide part, the hinge parts arranged at two ends of the driving rod penetrate through the double-track guide grooves respectively to be connected with the, the face guard rotation limiting part is installed on the installation groove through a connecting piece, the linkage guide annular part is hinged with the chin guard rotation guiding part through a first rotating shaft, the chin rotation guiding part is connected with the installation groove through the connecting piece, the face guard rotation limiting part is provided with a face guard rotation limiting guide groove, and the linkage guide annular part is further provided with a limiting guide part matched with the limiting guide groove.

2. The helmet for rotation of the chin guard in association with the mask according to claim 1, wherein the mounting grooves are grooves symmetrically disposed on both sides of the helmet body and recessed inward, respectively, the grooves are in a stepped groove structure and are divided into three layers, the three layers of grooves are respectively a mask rotation limiting member mounting groove located on a third layer, a chin rotation guiding member mounting groove located on a first layer, and a driving end movement range limiting groove of the driving rod located on a second layer, the shape of the mask rotation limiting member mounting groove is adapted to the shape of the mask rotation limiting member, the shape of the chin rotation guiding member mounting groove is adapted to the shape of the chin rotation guiding member, and the shape of the driving end movement range limiting groove of the driving rod is adapted to the driving end movement range of the driving rod.

3. The helmet of claim 1, wherein the chin guard is rotatable in association with the visor, and wherein the visor rotation limiting member is an arc-shaped bar, the inner arc surface of the arc-shaped bar is an arc surface, the outer arc surface of the arc-shaped bar is an arc surface provided with a limiting guide groove, a plurality of arc grooves having different radii of curvature are formed in the arc surface provided with the limiting guide groove to form a toothed arc-shaped limiting guide groove, the visor rotation limiting member is of a shell structure, and connecting members are embedded in both ends of the arc-shaped bar on the cavity side of the shell, and the arc-shaped bar faces the cavity side of the shell to a mounting groove of the visor rotation limiting member on the helmet body.

4. The helmet for rotation of a chin guard and a face mask according to claim 1, wherein the face mask mounting member has a strip-shaped arc surface structure, one side of an outer arc surface of the strip-shaped arc surface is adapted to be connected to the face mask, one side of an inner arc surface of the strip-shaped arc surface is adapted to be connected to the link guide ring member, or one side of an inner arc surface of the strip-shaped arc surface and the link guide ring member form an integral structure, the strip-shaped arc surface has a slot and/or a protruding edge on one side of the outer arc surface adapted to be connected to the face mask, and a width of the strip-shaped arc surface is greater than a width of.

5. The chin guard-mask linked rotation helmet of claim 3, wherein the link guide ring member has a D-shaped ring structure, a straight side of the link guide ring member of the D-shaped ring structure corresponds to a side of the inner arc surface of the strip-shaped arc surface, and a connecting portion is provided between the straight side and the side of the inner arc surface of the strip-shaped arc surface, wherein a first through hole is provided at a side of the ring edge of the D-shaped link guide ring member, a first rotation shaft for being hinged to the chin rotation guide member is provided in the first through hole, and the link guide ring member swings around the first rotation shaft by the driving end of the driving rod.

6. The helmet for rotation of the chin guard in association with the visor as claimed in claim 5, wherein a second through hole is further formed in one side of the straight edge of the D-shaped interlocking guide ring-shaped member, a second rotating shaft is provided in the second through hole, one end of the second rotating shaft is slidably fitted to one side of the second through hole, one side of the D-shaped interlocking guide ring-shaped member is extended from the other end of the second rotating shaft, a guide roller engaged with the toothed arc-shaped limit guide groove is provided at an end portion of the other end of the second rotating shaft, the second through hole is a waist-shaped long hole provided in a radial direction of the strip-shaped arc surface of the visor mounting member, and a spring for pressing the second rotating shaft is provided in the waist-shaped long hole, the spring being adapted to always press-fit the guide roller with the toothed.

7. The chin guard rotation-in-association helmet according to claim 1, wherein the driving rod has an elongated rod-like structure and is disposed between the interlocking guide ring member and the chin guard rotation guide member, a driving end of the driving rod for engaging with the inner ring of the interlocking guide ring member is provided at one end of the elongated rod-like driving rod, the other end of the driving rod is located outside the interlocking guide ring member, shaft holes are provided at both ends of the driving rod, respectively, and a first driving shaft and a second driving shaft are provided in the two shaft holes, respectively, wherein the first driving shaft passes through the shaft hole at the driving end of the driving rod, and the second driving shaft passes through the shaft hole at the other end of the driving rod.

8. The helmet for rotating in association with a chin guard according to claim 7, wherein the chin guard rotation guide has a D-shaped shell structure, the D-shaped shell is provided with a through double-track guide groove, a first guide groove in the through double-track guide groove is in sliding fit with a first driving shaft penetrating through a shaft hole at the driving end of the driving rod, a second guide groove in the through double-track guide groove is in sliding fit with a second driving shaft penetrating through a shaft hole at the other end of the driving rod, the first guide groove and the second guide groove are arc-shaped grooves which are distributed in a front-back and inclined manner, the groove length of the second guide groove is more than twice of the groove length of the first guide groove, the side edge of one side of the straight edge section of the D-shaped shell is provided with a side sliding groove in sliding fit with the driving rod, and the D-shaped shell is also provided with a mounting hole of the chin guard rotation guide piece and a mounting hole of one end part of the first rotating shaft.

9. The helmet for rotation of the chin guard in association with the visor as claimed in claim 8, wherein the chin guard mounting member is a T-shaped member, the chin guard mounting member is disposed outside the rotation guide member of the chin guard, rotation shaft mounting holes for the first drive shaft and the second drive shaft are provided in a vertical section of the T-shaped member, fixing mounting holes for the chin guard are provided in a lateral section of the T-shaped member, end portions of the first drive shaft and the second drive shaft pass through the rotation shaft mounting holes and are connected to the chin guard mounting member by a connecting member or a fastening member, and the chin guard is connected to the chin guard mounting member by a fastening member or a fastening member through the fixing mounting holes.

10. The chin guard-visor linked rotation helmet of any one of claims 1 to 9, wherein the helmet body, the visor, the chin guard, the visor rotation limiter, the visor mounting member, the interlocking guide ring member, the driving rod, the chin guard rotation guide member, and the chin guard mounting member are each injection-molded or compression-molded from a polymer material.

Technical Field

The invention relates to the technical field of human body safety protection appliances, in particular to a helmet with a jaw protection type protection structure, and more particularly to a helmet with a chin guard which can rotate from the chin part of the helmet to the rear part of the helmet and can rotate in association with a face shield.

Background

It is well known that users of various motor vehicles, racing cars, racing boats, balance cars, aircraft, and even cycling bikes, during their manoeuvre of the implement, should wear a helmet to protect their head; in addition, in many special work situations, such as those working in painting shops, fire fighting, anti-terrorism and anti-riot and in harsh environments such as mining, coal mining, tunneling, etc., they also need to wear helmets to protect their heads from various injuries from casualties. Currently, the structural types of helmets mainly include full-helmet type helmets, which are provided with a chin guard for surrounding the chin of a user, and half-helmet type helmets, which do not have the chin guard. As for the helmet with the full-helmet structure, the helmet with the jaw protection structure can play a better role in protecting the head of a wearer; for the helmet with the half-helmet structure, better humanization is realized because organs such as the mouth, the nose and the like of a wearer are not tied by the jaw protection cover.

The traditional helmet has its jaw-protecting cover and shell body made of one-piece structure, i.e. its jaw-protecting cover is in a relatively fixed structural layout form relative to the shell body. Undoubtedly, the conventional helmet of one-piece construction is sturdy and secure, and therefore it has sufficient safety protection for the wearer. However, considering from another aspect, there are also drawbacks to the full helmet of one-piece construction: firstly, from the use point of view, when a wearer needs to take activities such as drinking, talking, resting and the like, the wearer needs to take off the helmet first to complete corresponding actions, and undoubtedly, the performance of the traditional integral structure type full-helmet is dull and inconvenient; secondly, from the production perspective, the helmet with the integrated structure has the structural characteristic that the large inner cavity is matched with the small opening, so that the mold is very complicated, the production efficiency is not high, and the reason that the manufacturing cost of the helmet with the integrated structure is high is solved.

Obviously, the traditional helmet with an integrated full helmet structure cannot meet the requirements of multiple targets such as safety, convenience, low cost and the like. In view of this, it is a natural object of the present helmet researchers and manufacturers to develop a helmet that combines the advantages of safety of the full helmet structure and convenience of the half helmet structure.

Chinese patent application CN105901820A proposes "a helmet with a variable jaw protection structure based on gear constraint", the greatest feature of the invention is: the helmet shell is characterized in that two cylindrical gear type fixed inner gears are respectively arranged beside two sides of the helmet shell, two cylindrical gear type rotating outer gears are correspondingly and fixedly arranged on two fork handles of the jaw guard, corresponding arc-shaped restriction grooves are formed in a bottom support fixedly connected with the helmet shell, the rotating outer gears and the fixed inner gears are limited by the restriction grooves to be meshed and form a kinematic pair, so that the position and the posture of the jaw guard are restricted according to the requirement of a preset process, the jaw guard finally runs according to a planned track between the full helmet structure position and the half helmet structure position and can be reversely converted mutually, in other words, the jaw guard can be lifted from the full helmet structure position to the half helmet structure position as required, and vice versa. Meanwhile, the jaw guard and the helmet shell main body are not integrated into a whole, so that a mold for manufacturing the helmet is simpler, the manufacturing cost can be reduced, and the production efficiency can be improved. It is obvious that the gear constraint variable jaw guard structure scheme provided by the patent application can better meet the multi-target requirements of safety, convenience and low cost, thereby promoting the progress of helmet technology.

However, although the helmet with variable jaw guard structure proposed in chinese patent application CN105901820A has self-evident advantages, it needs to use the through-feature and long-length arc-shaped restraining slot to maintain the engagement relationship between its external rotating gear and the internal fixed gear, and its external rotating gear follows the jaw to perform a swinging motion with a large rotation angle, and therefore, several disadvantages are brought, which are specifically shown as: 1) the longer and arc-shaped restraining slot creates a safety hazard in the reliability of the helmet, since when the chin guard is in its transformed position, especially when the jaw guard is in a certain intermediate position state of the full helmet structure and the half helmet structure to form a so-called uncovering helmet (the helmet belongs to a form of a 'quasi-half helmet structure helmet', the state is favorable for the wearer to drink water, talk, temporarily ventilate and the like, and is particularly suitable for gallery operation), because the jaw guard can not completely cover the restraint slot, namely, the handle body of the jaw guard can not effectively cover the through long arc restraint slot, and as a result, an opportunity is created for external foreign matters to enter a meshing kinematic pair formed by the rotating external gear and the fixed internal gear, once the occasion is generated, the gear restraint pair is easy to be stuck, in other words, the reliability of the helmet has certain hidden danger in the using process; 2) the existence of the arc-shaped restraining grooves with long length also causes the noise of the helmet to be larger, and also when the jaw guard is required to be in a certain intermediate position state of the full helmet structure and the half helmet structure in the process of changing the position of the jaw guard, so as to form a so-called uncovering helmet, the jaw guard can not completely cover the restraining grooves for a rider, so that the whistle sound energy generated by the external air flow flowing through the outer surface of the helmet is easily transmitted into the interior of the helmet from the through restraining grooves, and the restraining grooves are just arranged near the two ears of the wearer, so that the sound insulation effect of the helmet is poor or the comfort is poor; 3) the layout and operation of the external planetary gear can weaken the safety of the helmet to a certain extent, because the jaw guard can change the structure position, because the external gear moves along with the jaw guard, thus the planetary gear can present the planetary rotation type behavior, it can be easily found that the swept space area is large, and the space area range passed by the external gear rotates obviously can not arrange fastening screw or other fastening structure, at this time, the bottom base equipped with the long arc type restriction groove will be forced to be arranged into a thin shell-shaped component with large span, it is known that the component with the structure form of the helmet has small intrinsic rigidity, that is, the rigidity of the shell is weak, in other words, the safety of the helmet is weakened.

In addition, chinese patent CN 210124365U discloses a gear-constrained helmet with a variable jaw-protecting structure, which comprises a helmet shell main body, jaws and jaws handles on the jaws, wherein a bottom support, a handle, an internal gear, an external gear, and a transmission member form a linkage mechanism, wherein the internal gear and the external gear both rotate around a fixed axis and form a meshing constraint pair, the internal gear and the handles are mutually matched in a sliding manner to form a sliding constraint pair, and the transmission member transmits the motion of the external gear to the handles and drives the jaws to generate a telescopic displacement relative to the helmet shell main body, so that the jaws are turned over and move back and forth, and the pose conversion of the jaws between a full helmet position and a half helmet position is realized. The fork handle can cover the through groove on the inner gear in the jaw protection overturning process, so that external foreign matters are prevented from entering the gear pair, the use reliability of the helmet is ensured, external noise can be blocked from invading the helmet, the use comfort of the helmet is improved, the occupied space of the gear rotating in a fixed shaft is small, conditions are created for improving the rigidity of related parts, and the use safety of the helmet is also improved. However, the helmet has a very complicated structure, which is inconvenient to manufacture and use, and has a heavy weight, high manufacturing cost, a short service life, and is damaged.

Chinese patent CN111264968A also discloses a chin guard positioning assembly and a helmet having the same, which connects a helmet body portion covering a head of a user and a chin guard that moves from a protecting position to an open position or from the open position to the protecting position to each other, the chin guard positioning assembly comprising: a movable base part connected to the chin guard and movable together with the chin guard; a fixed base part connected to the helmet main body part and the movable base part, and serving as a reference for the movable base part to move the position; a fixed magnetic part fixed to the fixed base part; and a movable magnetic part which is fixed on the movable base part through magnetic interaction with the fixed magnetic part so as to fix the movable base part at a first position or a second position. The helmet also has the problems of complex structure, inconvenient processing and manufacturing, inconvenient use, heavy weight, high manufacturing cost, short service life, damage and the like.

In summary, there is still room for further improvement and improvement in the existing variable jaw structure type helmets.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides the helmet with the chin guard and the face guard which are related to each other and rotate, the structure is simple, the number of parts is small, the processing and the manufacturing are simple, the use is convenient, the service life is long, and the whole weight of the helmet is light.

In order to achieve the above object, the technical solution of the present invention is to provide a helmet with a chin guard and a visor rotating in association, the helmet includes a helmet main body, a visor and a chin guard are symmetrically hinged to the side surfaces of the helmet main body through a connecting assembly, mounting grooves of the connecting assembly are symmetrically disposed on both sides of the helmet main body, a visor rotation limiting member, a visor mounting member, a linkage guide ring member connected to the visor mounting member, a driving rod engaged with an annular groove of the linkage guide ring member, a chin guard mounting member connected to the driving rod through a hinge member, and a chin guard rotation guide member clamped between the driving rod and the chin guard mounting member are respectively mounted in the mounting grooves, a double-rail guide groove for guiding the rotation of the chin guard is disposed on the chin guard rotation guide member, the hinge members disposed at both ends of the driving rod respectively pass through the double-rail guide groove and are connected to the, the face guard rotation limiting part is installed on the installation groove through a connecting piece, the linkage guide annular part is hinged with the chin guard rotation guiding part through a first rotating shaft, the chin rotation guiding part is connected with the installation groove through the connecting piece, the face guard rotation limiting part is provided with a face guard rotation limiting guide groove, and the linkage guide annular part is further provided with a limiting guide part matched with the limiting guide groove.

In order to hide the connecting assembly in helmet main body's inside for the convenience, make it not receive the damage, reach the pleasing to the eye effect of appearance simultaneously, preferred technical scheme is, the mounting groove sets up in helmet main body's both sides for the symmetry, and inwards sunken recess respectively, the recess is the ladder groove structure and divide into the three-layer, the three-layer recess is the face guard rotation locating part mounting groove that is located the third layer respectively, the drive end motion range of the actuating lever that is located the chin rotation guiding part mounting groove of first layer and second floor limits the recess, the shape of face guard rotation locating part mounting groove and the shape looks adaptation of face guard rotation locating part, the shape of chin rotation guiding part mounting groove and the shape looks adaptation of chin rotation guiding part, the drive end motion range of actuating lever limits the shape of recess and the drive end motion range looks adaptation of.

In order to effectively limit the rotation range of the mask, the mask can not automatically slide down after rotating to a preset position, or the mask can not automatically slide down due to jolting due to vibration of a helmet main body when the helmet is worn, the mask can swing up and down, the preferred technical scheme is that the mask rotation limiting part is an arc-shaped strip part, the inner arc surface of the arc-shaped strip part is an arc surface, the outer arc surface of the arc-shaped strip part is an arc surface provided with a limiting guide groove, arc grooves with different multi-section curvature radiuses are arranged on the arc surface provided with the limiting guide groove to form a toothed arc limiting guide groove, the mask rotation limiting part is of a shell structure, connecting pieces are embedded at two ends of one side of a shell cavity of the arc-shaped strip part, and one side of the shell of the arc-. The mask rotation limiting part is manufactured into a shell structure, so that the weight of the mask rotation limiting part is reduced, and raw materials can be saved. Arc grooves with different sections of curvature radiuses are arranged on the arc surface provided with the limiting guide groove to form a toothed arc limiting guide groove structure, and the mask can not automatically slide down when the mask stops at any position in the rotating process.

In order to connect the face mask and the linkage guide ring-shaped part together and simplify the structure of installation operation, the preferred technical scheme is that the face mask installation part is of a strip-shaped arc-shaped surface structure, one side of the outer arc surface of the strip-shaped arc surface is used for being connected with the face mask, one side of the inner arc surface of the strip-shaped arc surface is used for being connected with the linkage guide ring-shaped part, or one side of the inner arc surface of the strip-shaped arc surface and the linkage guide ring-shaped part form an integral structure, one side of the outer arc surface, which is used for being connected with the face mask, of the strip-shaped arc surface is provided with a slot and/or a.

In order to reduce the structural size of the linkage guide ring-shaped piece as much as possible, reduce the weight of the linkage guide ring-shaped piece, facilitate the connection between the linkage guide ring-shaped piece and the helmet main body, facilitate the rotation of the face mask around the center of the rotation, and can stay at a preset position without slipping, a further preferred technical scheme is that the linkage guide ring-shaped piece is in a D-shaped ring-shaped structure, one side of a straight edge of the linkage guide ring-shaped piece of the D-shaped ring-shaped structure corresponds to one side of an inner arc surface of the strip-shaped arc surface, a connecting part is arranged between the straight edge of the linkage guide ring-shaped piece of the D-shaped ring-shaped structure and one side of an inner arc surface of the strip-shaped arc surface, a first through hole is arranged on one side of an annular edge of the D-shaped linkage guide ring-.

In order to reduce the structural size of the linkage guide ring-shaped piece as much as possible, reduce the weight of the linkage guide ring-shaped piece and facilitate the connection between the linkage guide ring-shaped piece and the helmet main body, and the mask can conveniently rotate around the rotation center and can stay at a preset position without sliding off, and the further preferable technical proposal is that, a second through hole is arranged at one side of the straight edge of the D-shaped linkage guide annular part, a second rotating shaft is arranged in the second through hole, one end of the second rotating shaft is in sliding fit with one side of the second through hole, the other end of the second rotating shaft extends out of one side of the D-shaped linkage guide ring-shaped element, the end part of the other end of the second rotating shaft is provided with a guide roller matched with the dentate arc-shaped limiting guide groove, the second through hole is a kidney-shaped long hole arranged along the radial direction of the strip-shaped arc-shaped surface of the mask mounting element, and a spring used for jacking and pressing the second rotating shaft is arranged in the waist-shaped long hole, and the spring is used for enabling the guide roller to be always in jacking and matching with the tooth-shaped arc-shaped limiting guide groove.

In order to facilitate the driving of the driving rod through the chin guard and the chin guard connecting piece, the driving linkage guiding ring piece is centered around the rotation to drive the mask to rotate, and the driving rod is of a long rod-shaped structure and is arranged between the linkage guiding ring piece and the chin guard rotation guiding piece, a driving end used for being matched with an inner ring of the linkage guiding ring piece is arranged at one end of the long rod driving rod, the other end of the driving rod is positioned outside the linkage guiding ring piece, shaft holes penetrating through the driving rod are respectively arranged at two ends of the driving rod, a first driving shaft and a second driving shaft are respectively arranged in the two shaft holes, the first driving shaft penetrates through the shaft hole in the driving end of the driving rod, and the second driving shaft penetrates through the shaft hole in the other end of the.

In order to facilitate guiding and limiting the motion track of the driving rod, facilitate installing the linkage guide annular part and the driving rod opening inside the installation groove, and simultaneously reduce the structural size and the weight of the chin guard rotation guide part as much as possible, a further preferred technical scheme is that the chin guard rotation guide part is in a D-shaped shell structure, a through double-track guide groove is arranged on the D-shaped shell, a first guide groove in the through double-track guide groove is in sliding fit with a first driving shaft penetrating through a shaft hole of a driving end of the driving rod, a second guide groove in the through double-track guide groove is in sliding fit with a second driving shaft penetrating through a shaft hole of the other end of the driving rod, the first guide groove and the second guide groove are arc grooves which are distributed in a front-back and inclined manner, the length of the second guide groove is more than twice of that of the first guide groove, a side chute in sliding fit with the driving rod is arranged on the side edge of, the D-shaped shell is also provided with a mounting hole of the jaw guard rotating guide piece and a mounting hole of one end part of the first rotating shaft.

In order to be convenient for link together chin guard shield and chin guard shield installed part, can link together chin guard shield installed part and actuating lever simultaneously, simultaneously for the structure size of minimize chin guard shield installed part, alleviate the weight of chin guard shield installed part, further preferred technical scheme is in addition, chin guard shield installed part is T shape structure, and chin guard shield installed part sets up in the outside that chin guard shield rotated the guide piece, is equipped with the pivot mounting hole of first drive shaft and second drive shaft on the vertical section of T shape structure, is equipped with the fixed mounting hole of chin guard shield on the horizontal section of T shape structure, and the tip of first drive shaft and second drive shaft passes the pivot mounting hole and passes through connecting piece or joint spare and be connected with chin guard shield installed part, and the chin guard shield is connected with chin guard shield installed part through fastener or joint spare for the fixed mounting hole.

In order to reduce the overall weight of the helmet conveniently, the batch production of each part on the helmet is facilitated, the processing and manufacturing efficiency of the product is improved, and the manufacturing cost of the product for a technician is reduced.

The chin guard and mask associated rotating helmet has the advantages that the chin guard and mask associated rotating helmet is simple in structure, few in parts, simple to process and manufacture, convenient to use, long in service life, light in overall weight and the like.

Compared with the helmet with the same or similar using effect disclosed in the background art, the helmet with the chin guard and the face guard rotating in a related mode has the advantages that various connecting parts and driving wheel part structures of the chin guard rotating and the face guard rotating are greatly simplified, the number of the parts is reduced, 1/3-1/5 for driving the chin guard and the face guard parts are mounted on the existing similar helmet, and meanwhile the complexity of each part is greatly simplified, so that the using performance of the helmet product is greatly improved. Because the quantity of spare part is few, every spare part structure is all comparatively simple, consequently the processing cost of manufacture of this helmet will be lower, and the reliability of use improves, and life has obtained the extension for the assembly and disassembly of helmet is more convenient, and the opening/closing operation of chin safety cover and face guard in the use is also more convenient, and is more swift, and stability is better.

Drawings

FIG. 1 is a schematic view of a bird in a rotating helmet with chin guard associated with a visor according to the present invention;

FIG. 2 is a schematic illustration of the partially exploded structure of FIG. 1;

FIG. 3 is a schematic view of a portion of the enlarged structure of FIG. 2;

FIG. 4 is a side view of the chin guard of FIG. 1 with the chin guard removed;

FIG. 5 is a schematic cross-sectional view of AA- -AA in FIG. 4;

FIG. 6 is a schematic cross-sectional view of the lines BB-BB of FIG. 4;

FIG. 7 is a schematic cross-sectional view of the CC-CC direction of FIG. 4;

FIG. 8 is a side view of the helmet in its initial state after the chin guard rotation guide is removed in FIG. 4;

FIG. 9 is a side view of the helmet shown in FIG. 8 with the chin guard rotation guide not removed and with the visor and chin guard raised upward;

FIG. 10 is a side view of the helmet of FIG. 8 with the chin guard rotation guide removed and the visor raised upward;

FIG. 11 is a side elevational view of the helmet of FIG. 8 with the chin guard rotation guide not removed and with the visor in a position to limit lifting of the visor and with the chin guard still lifted upwardly;

FIG. 12 is a side elevational view of the helmet of FIG. 8 with the chin guard rotation guide removed and the visor in a position to limit lifting of the visor and with the chin guard still lifted upwardly;

FIG. 13 is a side elevational view of the helmet of FIG. 8 with the chin guard rotation guide not removed and with the visor in a position to limit lifting of the visor and with the chin guard lifted upwardly;

FIG. 14 is a side elevational view of the helmet of FIG. 8 with the chin guard rotation guide removed and the visor in a position to limit lifting of the visor and with the chin guard lifted upwardly;

fig. 15 is a side view of the helmet in the condition of fig. 14, showing the initial return of the visor and chin guard.

In the figure: 1. a helmet main body; 2. a face mask; 3. a chin guard; 4. mounting grooves; 4.1, a first layer; 4.2, a second layer; 4.3, a third layer; 5. the mask rotates the position limiter; 5.1, rotating a limiting guide groove of the mask; 6. a mask mount; 6.1, inserting slots; 6.2, convex edge; 7. a link guide ring; 7.1, an annular groove; 7.2, straight edge; 7.3, a connecting part; 7.4, a ring-shaped edge; 7.5, a first through hole; 7.6, a second through hole; 7.7, D-shaped arc surfaces; 8. a drive rod; 8.1, a driving end; 9. a chin guard rotation guide; 9.1, a first guide groove; 9.2, a second guide groove; 9.3, side sliding grooves; 9.4, mounting holes; 10. a chin guard mount; 10.1, a vertical section; 10.2, a rotating shaft mounting hole; 10.3, a transverse section; 10.4, mounting holes; 11. a first rotating shaft; 12. a center of rotation; 13. a second rotating shaft; 14. a guide roller; 15. a shaft hole; 16. a first drive shaft; 17. a second drive shaft.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 to 15, the present invention is a helmet with a chin guard and a visor rotating in association, the helmet includes a helmet body 1, a visor 2 and a chin guard 3 are symmetrically hinged to the side surfaces of the helmet body 1 through connection members, mounting grooves 4 of the connection members are symmetrically formed on both sides of the helmet body 1, a visor rotation limiting member 5, a visor mounting member 6, a linkage guide ring member 7 connected to the visor mounting member 6, a driving rod 8 engaged with an annular groove 7.1 of the linkage guide ring member 7, a chin guard mounting member 10 connected to the driving rod 8 through a hinge member, and a chin guard rotation guide member 9 clamped between the driving rod 8 and the chin guard mounting member 10 are mounted in the mounting grooves 4, a double-rail guide groove for guiding the rotation of the chin guard is formed in the chin guard rotation guide member 9, the articulated elements that set up at 8 both ends of actuating lever pass the double track way guiding groove respectively and are connected with chin guard installed part 10, wherein the face guard rotates locating part 5 and installs on mounting groove 4 through the screw connection spare, linkage guide ring 7 rotates the guide piece 9 through first pivot 11 and chin guard and articulates, chin rotates the guide piece 9 and is connected with mounting groove 4 through the screw connection spare, it rotates spacing guide slot 5.1 to be equipped with the face guard on face guard rotates locating part 5, still be equipped with on linkage guide ring 9 and rotate spacing guide part of spacing guide slot 5.1 complex with the face guard.

In order to hide the connecting component inside the helmet main body 1, so that the connecting component is not damaged and the appearance is beautiful, in a preferred embodiment of the invention, the mounting grooves 4 are symmetrically arranged on two sides of the helmet main body 1, and inwards sunken recess respectively, the recess is the ladder groove structure and divide into the three-layer, three-layer recess is the mounting groove that is located the face guard rotation locating part 4 of third layer 4.3 respectively, the mounting groove that is located the chin of first layer 4.1 rotates guiding part 9 and the drive end 8.1 motion range of the actuating lever 8 of second layer 4.2 and limits the recess, the shape of face guard rotation locating part 5's mounting groove and the shape looks adaptation of face guard rotation locating part 5, the shape of chin rotation guiding part 9 mounting groove and the shape looks adaptation of chin rotation guiding part 9, the shape of the drive end 8.1 motion range of actuating lever 8 limit the recess and the drive end 8.1 motion range looks adaptation of actuating lever 8.

In order to effectively limit the rotation range of the mask 2 and simultaneously enable the mask 2 not to automatically slide down after rotating to a preset position or to swing up and down due to vibration and jolt of the helmet main body 1 when the helmet is worn, the preferred embodiment of the invention is that the mask rotation limiting part 5 is an arc-shaped strip part, the inner arc surface 5.2 of the arc-shaped strip part is an arc surface, the outer arc surface 5.3 of the arc-shaped strip part is an arc surface provided with a limiting guide groove 5.1, a plurality of arc grooves with different curvature radiuses are arranged on the arc surface provided with the limiting guide groove 5.1 to form a tooth-shaped arc limiting guide groove 5.1, the mask rotation limiting part 5 is a shell structure, nut connecting pieces are arranged at two ends of one side of a cavity of the shell of the arc-shaped strip part, and the arc-shaped strip part enables one side of the cavity of the shell to face towards an. The mask rotation limiting part 5 is manufactured into a shell structure, so that the weight of the mask rotation limiting part 5 is reduced, and raw materials can be saved. Arc grooves with different sections of curvature radiuses are arranged on the arc-shaped surface provided with the limiting guide groove 5.1 to form a tooth-shaped arc-shaped limiting guide groove structure, and the mask 2 can not automatically slide down when the mask 2 can stay at any position in the rotating process.

In order to facilitate the connection of the face mask 2 and the linkage guide ring-shaped member 7 together and simplify the construction of the installation operation, the preferred embodiment of the present invention is that the face mask installation member 6 is a strip arc-shaped surface structure, one side of the outer arc surface of the strip arc-shaped surface is used for connecting with the face mask 2, one side of the inner arc surface of the strip arc-shaped surface is used for connecting with the linkage guide ring-shaped member 7, or one side of the inner arc surface of the strip arc-shaped surface and the linkage guide ring-shaped member 7 can be made into an integral structure, one side of the outer arc surface of the strip arc-shaped surface for connecting with the face mask 2 is provided with an insertion slot 6.1 and/or a convex edge 6.2, and the width of.

In order to minimize the structural size of the link guide ring 7, reduce the weight of the link guide ring 7, facilitate the connection between the link guide ring 7 and the helmet body 1, and facilitate the rotation of the visor 2 about the rotation center 12, and is able to stay in a predetermined position without slipping off, a further preferred embodiment of the invention is, the linkage guide annular part 7 is of a D-shaped annular structure, one side of a straight edge 7.2 of the linkage guide annular part 7 of the D-shaped annular structure corresponds to one side of the inner arc surface of the strip-shaped arc surface of the mask mounting part 6, a connecting part 7.3 is arranged between the straight edge 7.2 and one side of the inner arc surface of the strip-shaped arc surface, a first through hole 7.5 is arranged at one side of the annular edge 7.4 of the D-shaped linkage guide annular part 7, a first rotating shaft 11 for hinging with the jaw rotation guide 9 is arranged in the first through hole 7.5, and the linkage guide annular part 7 swings around the first rotating shaft 11 under the driving of the driving end 8.1 of the driving rod 8.

In order to reduce the structural size of the linkage guide ring-shaped element 7 as much as possible, reduce the weight of the linkage guide ring-shaped element 7, facilitate the connection between the linkage guide ring-shaped element 7 and the helmet main body 1, facilitate the mask to rotate around the rotation center 12 and stay at a predetermined position without sliding off, a further preferable embodiment of the invention is that a second through hole 7.6 is further arranged on one side of a straight edge 7.2 of the D-shaped linkage guide ring-shaped element 7, a second rotating shaft 13 is arranged in the second through hole 7.6, one end of the second rotating shaft 13 is in sliding fit with one side of the second through hole 7.6, the other end of the second rotating shaft 13 extends out of one side of the D-shaped linkage guide ring-shaped element 7, a guide roller 14 matched with a toothed arc-shaped limit guide groove is arranged on the other end of the second rotating shaft 13, the second through hole 7.6 is a kidney-shaped long hole arranged along the radial direction of a, a spring (not shown in the figure) for pressing the second rotating shaft 13 is arranged in the waist-shaped long hole, and the spring is used for enabling the guide roller 14 to be always in pressing fit with the tooth-shaped arc-shaped limiting guide groove.

In order to facilitate the driving of the driving rod 8 together by the chin guard 3 and the chin guard connecting member 10, the driving link guide ring 7 rotates the mask 2 around the rotation center 12, and in the preferred embodiment of the present invention, the driving rod 8 is a long bar-shaped structure, is arranged between the linkage guide ring 7 and the chin guard rotation guide 9, one end of the long bar driving rod 8 is provided with a driving end 8.1 of the driving rod 8 which is matched with the inner ring of the linkage guiding annular part 7, the other end of the driving rod 8 is positioned outside the linkage guiding annular part 7, shaft holes 15 are respectively formed at both ends of the driving rod 8 to penetrate through the driving rod 8, a first driving shaft 16 and a second driving shaft 17 are respectively arranged in the two shaft holes 15, wherein a first drive shaft 16 passes through the shaft hole 15 at the drive end 8.1 of the drive rod 8 and a second drive shaft 17 passes through the shaft hole 15 at the other end of the drive rod 8.

In order to guide and limit the motion track of the driving rod 8, to fasten the linkage guide ring 7 and the driving rod 8 inside the mounting groove 4, and to reduce the structural size and weight of the chin guard rotation guide 9 as much as possible, a further preferred embodiment of the present invention is that the chin guard rotation guide 9 is in a D-shaped housing structure, a through double-track guide groove is provided on the D-shaped housing, a first guide groove 9.1 of the through double-track guide groove is in sliding fit with a first driving shaft 16 passing through a shaft hole 15 of a driving end 8.1 of the driving rod 8, a second guide groove 9.2 of the through double-track guide groove is in sliding fit with a second driving shaft 17 passing through a shaft hole 15 at the other end of the driving rod 8, the first guide groove 9.1 and the second guide groove 9.2 are arc-shaped grooves which are distributed obliquely front and back, and the length of the second guide groove 9.2 is more than twice as long as the length of the first guide, the side edge of one side of the straight edge 7.2 section of the D-shaped shell is provided with a side sliding groove 9.3 which is in sliding fit with the driving rod 8, and the D-shaped shell is also provided with a mounting hole 9.4 of the chin guard rotating guide piece 9 and a mounting hole at one end part of the first rotating shaft 11.

In order to facilitate the coupling of the chin guard 3 to the chin guard mount 10, and at the same time to enable the coupling of the chin guard mount 10 to the driving rod 8, and in order to minimize the structural size of the chin guard mounting member 10 and reduce the weight of the chin guard mounting member 10, further preferred embodiments of the present invention also, the chin guard mounting member 10 is a T-shaped structural member, the chin guard mounting member 10 is provided outside the chin guard rotation guide 9, a rotating shaft mounting hole 10.2 of a first driving shaft 16 and a second driving shaft 17 is arranged on the vertical section 10.1 of the T-shaped structural part, the fixing mounting hole 10.4 of the chin guard is formed in the transverse section 10.3 of the T-shaped structural part, the end portions of the first driving shaft 16 and the second driving shaft 17 penetrate through the rotating shaft mounting hole 10.2 and are connected with the chin guard mounting piece 10 through nut connecting pieces or clamping pieces, and the chin guard 3 is connected with the chin guard mounting piece 10 through the fixing mounting hole 10.4 through screw fasteners or clamping pieces.

In order to reduce the overall weight of the helmet, facilitate the mass production of each component on the helmet, improve the processing and manufacturing efficiency of the product, and reduce the manufacturing cost of the product, a further preferred embodiment of the present invention is that the helmet main body 1, the face shield 2, the chin guard 3, the face shield rotation limiting member 5, the face shield mounting member 6, the linkage guide ring member 7, the driving rod 8, the chin guard rotation guide member 9, and the chin guard mounting member 10 are all injection molded or compression molded from a polymer material.

The working principle of the helmet with the chin guard rotating in association with the face mask is as follows:

the associated rotation in the helmet in which the chin guard rotates in association with the visor means that, as shown in fig. 4 to 14, during the rotation for lifting the chin guard 3 from the bottom up, the visor 2 is simultaneously lifted and rotated upward by the chin guard 3. In the process that the face shield 2 is lifted upwards and rotated by the chin guard 3, when the lower edge of the face shield 2 slightly exceeds the edge of the front part of the helmet body 1, the face shield 2 stops rotating upwards, and the chin guard 3 can rotate upwards and backwards until the front part of the chin guard 3 rotates to the middle position of the rear part of the helmet body 1.

Thereafter the mask 2 can be pulled back down alone, in which state only the mask 2 can act as a mask for the face, while the chin guard 3 is not placed in the chin area, which cannot be protected. At this time, the chin guard 3 can be rotated back and forth to be reset, and in the rotating and resetting process of the chin guard 3, the pulled mask 2 can be lifted up first, and then the chin guard 3 drives the mask 2 to be reset to the initial state of the mask 2 and the chin guard 3 from top to bottom, that is, the mask 2 and the chin guard 3 are both in the face and chin protection state.

As shown in fig. 5 to 7, the mounting grooves 4 of the connecting assembly are symmetrically formed on both sides of the helmet main body 1, so that the connecting assembly can be hidden inside the helmet main body 1, the appearance of the helmet main body is more attractive, and the connecting assembly can be prevented from being exposed outside the helmet main body and being easily damaged.

As shown in fig. 2 and 3, the mask rotation limiting member 5 is mainly used to limit the extreme position of the mask 2 in the upward and downward rotation, and when the mask 2 rotates to the extreme position, the mask rotation limiting member 5 cannot continue to rotate upward or downward.

As shown in fig. 2 and 3, the mask mounting part 6 is used for being connected with the mask 2, and the mask mounting part 6 and the mask 2 can be manufactured into an integral structure, but the structure will increase the structural size of the mask body, increase the size and processing difficulty of the mask manufacturing grinding tool, manufacture the mask mounting part 6 and the mask 2 into a split structure, and facilitate the replacement of the mask even if the mask is manufactured with the mask.

As shown in fig. 2 and 3, the linkage guide ring 7 is a key component for linkage between the face mask 2 and the chin guard 3, and can be made into an integral structural member with the mounting part of the face mask 2 or a separate structure with the mounting part 6 of the face mask, and then assembled into an integral structural member.

As shown in fig. 2 and 3, the inner annular surface of the link guide ring 7 is an inner annular surface for matching with the driving end 8.1 of the driving rod 8, and the inner annular surface is in a D-shaped structure. Drive shafts (a first drive shaft 16 and a second drive shaft 17) are provided at both ends of the drive shaft 8, respectively, while the two drive shafts are passed through two guide grooves (a first guide groove 9.1 and a second guide groove 9.2) of the chin guard rotation guide 9, respectively, and then the two drive shafts are connected to the chin guard mounting member 10, which is in turn connected to the end of the chin guard 3. A rotation center 12 of the interlocking guide ring-shaped member is provided on the ring-shaped surface of the interlocking guide ring-shaped member 7, a first through hole 7.5 is provided at the rotation center 12, and the interlocking guide ring-shaped member 7 is connected to the chin guard rotation guide 9 side or the mounting groove 4 side by a first rotation shaft 11 passing through the first through hole 7.5. And the chin guard rotation guide 9 is coupled to the mounting groove 4 side provided on the helmet main body 1 by a screw coupling. That is, the position of the first rotating shaft 11 as the rotating center 12 is fixed with respect to the helmet body 1, and the linking guide ring 7 swings around the first rotating shaft 11 as the rotating center 12, that is, the visor 2 also swings around the first rotating shaft 11 as the rotating center 12.

As shown in fig. 2 and 3, however, when the link guide ring 7 swings about the center of rotation 12 of the first rotation shaft 11, the swing motion is achieved by the driving end 8.1 of the driving rod 8. Because two rotating shafts (a first driving shaft 16 and a second driving shaft 17) are respectively arranged at two ends of the driving rod 8, and the two rotating shafts respectively slide in two guide grooves (a first guide groove 9.1 and a second guide groove 9.2) on the shield rotation guide part 9, namely, the rotating centers of the two rotating shafts on the driving rod 8 are not fixed rotating centers, but are track-changing rotating centers sliding and displacing in the two guide grooves, namely, the motion track of the driving end 8.1 of the driving rod 8 is limited by the rotating center 12 of the first rotating shaft 11 on the linkage guide annular part 7, is also limited by the rotating centers of the two guide grooves (track-changing) and is also related to the shape of the inner ring surface of the linkage guide annular part 7.

The specific process of driving the linkage guide ring 7 to swing and the mask 2 to rotate by the driving end 8.1 of the driving rod 8 is that, as shown in fig. 2, 3 and 8-14, the mask 2 and the chin guard 3 are both in the original position in the state of protecting the face and the chin. The driving end 8.1 of the driving rod 8 is located at the upper end of the vertical edge 7.2 of the D-shaped inner annular surface of the linkage guiding annular piece 7, when the chin guard 3 starts to lift upwards, the end of the chin guard 3 passes through the chin guard connecting piece 10 connected with the driving rod and two rotating shafts (a first driving shaft 16 and a second driving shaft 17) connected with the chin guard connecting piece 10, and the two rotating shafts pass through two guide grooves (a first guide groove 9.1 and a second guide groove 9.2) on the guard rotating guide 9 and are connected with the two ends of the driving rod 8, so that the driving end 8.1 of the driving rod 8 starts to drive the linkage guiding annular piece 7, the linkage guiding annular piece 7 is driven to rotate clockwise around the rotating center 12 of the first rotating shaft 11 along the D-shaped inner annular surface from the upper end of the D-shaped arc-shaped surface 7.7, and the chin guard 3 can drive the face guard 2 to rotate clockwise together. When the chin guard 3 drives the visor 2 to rotate until the lower edge of the visor 2 slightly exceeds the edge of the front end of the helmet body 1, the driving end 8.1 of the driving rod 8 also drives the link guide ring 7 to rotate clockwise around the first rotation center 12 to the lower end of the D-shaped arc-shaped surface 7.7. The driving end 8.1 of the driving rod 8 passes through the first rotating shaft 16 of the driving end 8.1 of the driving rod 8 and is positioned at the upper end of the first guide groove 9.1 in the two guide grooves on the shield rotation guide 9 in the process of driving the linkage guide ring 7 from the upper end of the D-shaped arc-shaped surface 7.7 to the lower end of the D-shaped arc-shaped surface 7.7 clockwise around the rotation center 12 of the first rotating shaft 11, and the second rotating shaft 17 passing through the other end of the driving rod 8 rotates from the upper end of the second guide groove 9.2 in the two guide grooves on the shield rotation guide 9 to the middle of the second guide groove.

When the chin guard 3 continues to rotate clockwise upward and rearward as shown in fig. 2, 3 and 15, the driving end 8.1 of the driving rod 8 is driven by the chin guard 3, the chin guard connecting member 10, the rotating shaft and the driving rod 8, so that the driving end 8.1 of the driving rod 8 moves from the lower end to the upper end of the D-shaped inner annular vertical edge 7.2 of the interlocking guide ring 7, and since the driving end 8.1 of the driving rod 8 moves along the D-shaped inner annular vertical edge 7.2 of the interlocking guide ring 7, the interlocking guide ring 7 cannot be driven to rotate around the rotation center 12 of the first rotating shaft 11, and therefore, during this period, when the chin guard 3 continues to rotate clockwise upward and rearward, the face mask 2 will not rotate clockwise any more upward and rearward. While the chin guard can continue to rotate the middle of the rear face of the helmet body 1 clockwise upward and rearward. The end part of the chin guard 3 is driven by the chin guard 3, the chin guard connecting piece 10, the rotating shaft and the driving rod 3 to enable the driving end 8.1 of the driving rod 8 to move from the lower end to the upper end of the vertical edge 7.2 of the D-shaped inner annular surface of the linkage guide annular piece 7, the first driving shaft 16 penetrating through the driving end 8.1 of the driving rod 8 is transferred from the upper end of the first guide groove 9.1 in the two guide grooves on the guard rotating guide piece 9 to the lower end of the first guide groove 9.1, and the second driving shaft 17 penetrating through the other end of the driving rod 8 is rotated from the middle part of the second guide groove 9.2 in the two guide grooves on the guard rotating guide piece 9 to the lower end of the second guide groove 9.2.

As shown in fig. 2 and 3, a second through hole 7.6 is further formed in the annular surface of the linkage guide annular member 7, a second rotating shaft 13 is disposed in the second through hole 7.6, one end of the second rotating shaft 13 penetrates through the annular edge 7.4 of the linkage guide annular member 7 and extends to the position of the mask rotation limiting member 5, and a guide roller 14 is mounted at the end of the second rotating shaft, the guide roller 14 is matched with the toothed arc limiting guide groove on the mask rotation limiting member 5 to limit the mask 2, in order to enable the guide roller 14 and the toothed arc limiting guide groove to be always in a top pressing fit state, the second through hole 7.6 is a kidney-shaped through hole, and a third rotating shaft and a spring (not shown in the drawings) for pressing the second rotating shaft are disposed in the kidney-shaped through hole.

As shown in fig. 15, after the chin guard 3 is rotated to the rear middle of the helmet main body 1, the visor can be pulled down to be rested. The chin guard 3 rotates upward and forward from the rear of the helmet body 1 until the lower edge of the chin guard 3 approaches the front edge of the helmet body 1, the driving end 8.1 of the driving rod 8 drives the D-shaped inner annular surface of the linkage guide annular member 7 and moves from the upper end of the D-shaped arc surface 7.7 to the lower end, at this time, the linkage guide annular member 7 rotates clockwise around the rotation center 12 of the first rotating shaft 11, so the face mask 2 also rotates along with the rotation, after the lower edge of the face mask 2 rotates slightly beyond the front edge of the helmet body 1, the driving end 8.1 of the driving rod 8 drives the D-shaped arc surface 7.7 of the linkage guide annular member 7 and moves from the upper end of the D-shaped inner annular straight edge 7.2 to the lower end, at this time, the linkage guide annular member 7 does not rotate clockwise around the rotation center 12 of the first rotating shaft 11, so the face mask 2 does not rotate along with the rotation. While the first rotary shaft 16 passing through the driving end 8.1 of the driving lever 8 is also upwardly shifted to the upper end by the lower end of the first guide groove 9.1 of the two guide grooves on the guard rotary guide 9, the second rotary shaft 17 passing through the other end of the driving lever 8 is also upwardly shifted to the middle by the lower end of the second guide groove 9.2 of the two guide grooves on the guard rotary guide 9. In the process, when the chin guard 3 rotates from back, from bottom to front and upwards, the mask 2 which has been pulled down needs to be lifted upwards to the pulled-up limit position, namely, the chin guard 2 rotates anticlockwise and upwards, the mask 2 rotates clockwise and upwards, and after the chin guard 3 is overlapped with the mask 2, the chin guard 3 rotates downwards and forwards and anticlockwise.

As shown in fig. 15, when the chin guard 3 continues to rotate downward and forward, the driving end 8.1 of the driving rod 8 continues to drive the D-shaped inner annular surface of the link guide annular member 7, and then the lower end of the D-shaped surface arc surface 7.7 of the link guide annular member 7 rotates toward the upper end of the arc surface section, at this time, the driving end 8.1 of the driving rod 8 drives the link guide annular member 7 to start to rotate counterclockwise around the rotation center 12 of the first rotating shaft 11, and if the face mask 2 is pulled down, the face mask returns to the upward raised state under the action of the driving end 8.1 of the driving rod 8, and then returns to the initial protection state together with the chin guard 3. In this process, the first rotary shaft 16 passing through the driving end 8.1 of the driving rod 8 returns to the upper end of the first guide groove 9.1 of the two guide grooves of the guard rotary guide 9 and remains stationary, while the second rotary shaft 17 passing through the other end of the driving rod 8 is upwardly transferred from the middle of the second guide groove 9.2 of the two guide grooves of the guard rotary guide 9 to the upper end thereof to be restored.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.