Helmet shield opening mechanism capable of avoiding collision of variable jaw protector

Abstract

The utility model relates to a protective cover opening mechanism of a variable jaw protection type helmet. The protective cover opening mechanism comprises a jaw protection fork handle provided with a driving gear, a protective cover supporting leg provided with a bearing edge, and a trigger provided with a driven gear and comprising a first pushing structure. In the process that the protective jaw is overturned from the position of the half helmet structure to the position of the full helmet structure, the driving gear drives the driven gear and then drives the trigger to rotate, the first pushing structure touches and drives the bearing edge on the protective cover supporting leg along with rotation of the trigger, and then the protective cover at the buckling-down position is forced to make an opening action. Therefore, the protective cover can avoid the protective jaw which falls back and returns to the original position. According to the protective cover opening mechanism, the protective cover is opened by means of gear meshing and combining with trigger driving, the protective cover is reliably opened in advance to avoid the protective jaw in the buckling falling reset process, the protective jaw is effectively prevented from directly hitting the protective cover, the protective cover is protected against damage, and the working reliability of the protective cover opening mechanism is improved; and meanwhile, the use safety and stability of the helmet are also improved.

Description

Technical Field

[0001] The utility model relates to a helmet shield opening mechanism, in particular to a helmet shield opening mechanism which can prevent a variable jaw guard type helmet from hitting a shield when the jaw guard is flipped and reset, and more particularly to a helmet shield opening mechanism which can open the shield in advance during the reset process of the jaw guard returning to the full helmet structure position to avoid the jaw guard hitting the shield. Background Art

[0002] A variable jaw guard helmet refers to a helmet whose jaw guard can change the position of the jaw guard structure according to riding needs, and specifically refers to a helmet whose jaw guard can switch between a full-face helmet structure position (equivalent to a full-face helmet) and a half-face helmet structure position (equivalent to a half-face helmet). The half-face helmet structure position refers to the state where the jaw guard has climbed over the shield (especially the shield in a fully opened state) and crossed the dome of the helmet to the back of the helmet. The biggest advantage of this type of helmet is that it combines the protective safety of a full-face helmet with the ease of use of a half-face helmet. Therefore, it is safe and reliable to use, and at the same time, it is pleasant to wear and has a good experience, so it is very competitive in the market. Therefore, variable jaw guard helmets have gained the favor of more and more consumers in the fields of riding and sports competitions, and have been increasingly widely used.

[0003] However, the variable jaw guard type helmet needs to solve a problem, that is, when the jaw guard is in the half helmet structure position and the shield is in the fully buckled position, if the jaw guard needs to be flipped back to the full helmet structure position, the helmet must first allow the shield to be opened in advance and separated from the original fully buckled position. Only in this way can the jaw guard that is buckled and reset be prevented from hitting the shield, thereby preventing damage to the shield. At present, there are two types of solution strategies and implementation mechanisms for variable jaw guard type helmets to avoid the jaw guard hitting the shield: one is a spring-driven spring-lifting shield opening mechanism, and the other is a convex pin-driven pry bar-driven shield opening mechanism. Both have their own advantages and disadvantages. The main problems are: the spring-driven shield opening mechanism has a difficult-to-control opening process, resulting in poor reliability, and a large seating force, resulting in annoying impact noise, while the pry bar-driven shield opening mechanism has a problem that the convex pin is overstressed and the working reliability is poor, and the convex pin driving stroke is limited, resulting in difficulty in design layout.

[0004] In summary, it is very necessary to develop a helmet shield opening mechanism that can effectively avoid the impact of the variable jaw guard and has high working reliability. This is not only important but also necessary for the variable jaw guard type helmet. Summary of the invention

[0005] The utility model aims at the disadvantage that the working reliability of the shield opening mechanism of the existing variable jaw guard type helmet is not high, and proposes a helmet shield opening mechanism which can avoid the impact of the variable jaw guard. The utility model aims to: without hindering the general opening and buckling-off operation of the shield, reliably realize that when the jaw guard flips back from the half helmet structure position to the full helmet structure position, the shield is opened in advance to avoid the shield being hit by the jaw guard that is buckled and reset, thereby protecting the shield from damage, which not only effectively improves the working reliability of the shield opening mechanism, but also can improve the safety and stability of the use of the helmet.

[0006] The purpose of the utility model is achieved as follows: a helmet shield opening mechanism capable of avoiding collision with a variable jaw guard, comprising a jaw guard and a shield, wherein the jaw guard comprises a fork handle, and the shield comprises legs; the jaw guard and its fork handle can perform fixed-axis rotational motion, and the shield and its legs can perform swinging motion; the utility model is characterized in that: a driving gear is provided, the driving gear is fastened to the fork handle of the jaw guard or it and the jaw guard fork handle are made of an integral structure, and the driving gear and the jaw guard rotate around the same axis; in addition, a driven gear and a trigger are provided, the driven gear is fastened to the trigger or both are made of The structure is one-piece; the driving gear is meshed with the driven gear, the trigger is provided with a first pushing structure, and the leg of the shield is provided with a bearing edge; when the jaw guard is flipped and returned from the half-helmet structure position to the full-helmet structure position, the driving gear makes a fixed-axis rotation and drives the driven gear to rotate, and then the driven gear drives the trigger to rotate, and then the rotation of the trigger causes the first pushing structure to also make a rotation movement, and during the rotation of the trigger, the first pushing structure can touch the bearing edge on the leg, so the first pushing structure drives the shield to open through the bearing edge of the leg.

[0007] Furthermore, the movement of the above-mentioned driven gear is fixed-axis rotation.

[0008] Furthermore, the above-mentioned trigger is provided with a second pushing structure. When the jaw guard is flipped from the full-helmet structure position to the half-helmet structure position to perform an opening action, the driving gear drives the driven gear to generate a rotational motion, and drives the trigger to rotate through the driven gear. Then, the rotation of the trigger will cause the second pushing structure to rotate, and during the rotation of the trigger, the second pushing structure can touch the bearing edge on the support leg, so that the second pushing structure drives the shield to perform an opening action through the bearing edge of the support leg.

[0009] Furthermore, a damping gear is provided, and the damping gear is meshed with the driving gear or the driven gear.

[0010] Furthermore, the damping gear is provided with damping grease.

[0011] The swinging motion of the above-mentioned shield and its legs is fixed-axis rotation.

[0012] The ratio of the number of teeth of the driven gear to the number of teeth of the driving gear is in the range of 0.45-0.55.

[0013] The utility model provides a helmet shield opening mechanism capable of avoiding impact of a variable jaw guard, wherein a driving gear with a fixed axis rotation is arranged on the jaw guard fork handle to mesh with a driven gear, thereby driving a trigger that is tightly connected to the driven gear or is made as an integral structure to rotate, so that a first push structure on the trigger is used to touch and drive the bearing edge on the support leg so that the shield can produce a lifting action and escape from its buckled position, thereby allowing the shield to avoid the falling jaw guard when the jaw guard flips from the half-helmet full-helmet structure position to return to the full-helmet structure position, and finally achieving the positive effect of preventing the shield from being hit by the jaw guard. Furthermore, a second push structure is arranged on the trigger, and when the jaw guard flips from the full-helmet structure position to the half-helmet structure position to make a lifting action, the second push structure can touch and drive the bearing edge on the support leg, and finally allow the shield to be lifted and escape from its buckled position. The utility model does not hinder the general opening and buckling operation of the shield and can also reliably realize the shield to be opened in advance and avoid the jaw guard in the buckling and resetting process when the jaw guard flips back from the half-helmet structure position to the full-helmet structure position, thereby avoiding the jaw guard from hitting the shield and protecting the shield from damage. This not only effectively improves the working reliability of the shield opening mechanism, but also can improve the safety and stability of the helmet in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an axonometric diagram of a helmet shield opening mechanism capable of avoiding collision with a variable jaw guard according to the utility model;

[0015] Figure 2 yes Figure 1 The helmet shield opening mechanism is a directional view obtained when observing from the inside of the helmet to the outside of the helmet;

[0016] Figure 3 yes Figure 1 The helmet shield opening mechanism is a directional view obtained when observing from the outside of the helmet to the inside of the helmet;

[0017] Figure 4 Is configured with Figure 1 An axonometric view of an embodiment of a variable chin guard type helmet of the helmet shield opening mechanism shown;

[0018] Figure 5 yes Figure 4 A side view of the embodiment of the variable jaw protection helmet;

[0019] Figure 6 yes Figure 4 A front view of the embodiment of the variable chin guard helmet;

[0020] Figure 7 It is an isometric view of a trigger embodiment of a helmet shield opening mechanism capable of avoiding impact of a variable jaw guard according to the utility model;

[0021] Figure 8 yes Figure 7 An axonometric view of the illustrated trigger embodiment from another perspective;

[0022] Fig. 9 It is an axonometric diagram of an embodiment of a helmet jaw guard and a helmet shield opening mechanism trigger coupled and engaged with each other;

[0023] Fig.10 yes Figure 4 The state change process diagram of the changeable chin guard type helmet when the chin guard is flipped from the half helmet structure position to the full helmet structure position, and the position relationship between the chin guard and the shield evolves;

[0024] Fig.11 yes Figure 4 The state change process diagram of the changeable jaw guard type helmet during the whole process of the jaw guard flipping from the full helmet structure position to the half helmet structure position, wherein the position relationship between the jaw guard and the shield evolves;

[0025] Fig.12 It is an isometric example diagram of the positional relationship between the trigger and the shield legs when the helmet shield opening mechanism of the utility model responds to the initial stage of the process in which the jaw guard flips from the half-helmet structure position to the full-helmet structure position;

[0026] Fig.13 yes Fig.12 a cross-sectional view of the illustrated embodiment;

[0027] Fig.14 This is an example diagram of the positional relationship between the trigger and the shield legs of the helmet shield opening mechanism of the utility model when the jaw guard flips from the full helmet structure position to the half helmet structure position in response to the initial stage of the process;

[0028] Fig.15 yes Fig.14 A cross-sectional view of the illustrated embodiment. DETAILED DESCRIPTION

[0029] The structure and principle of the present invention are further described below with reference to specific embodiments. Figures 1 to 15 :

[0030] A helmet shield opening mechanism capable of avoiding impact of a variable jaw guard comprises a jaw guard 1 and a shield 2, wherein the jaw guard 1 comprises a fork handle 1a, and the shield 2 comprises a leg 2a. The jaw guard 1 and its fork handle 1a can perform fixed-axis rotational motion around a fixed first axis O1. Here, the first axis O1 is optimally arranged to be perpendicular to the symmetry plane P of the helmet 3, and the two fork handles 1a of the jaw guard 1 of the helmet 3 share the same axis O1 (see Figures 4 to 6 The shield 2 and its legs 2a of the utility model can swing, and in particular, the swinging motion of the shield 2 and its legs 2a is a fixed-axis rotation motion around the second axis O2 belonging to the fixed axis (such as Figure 1 to Figure 2 , Figures 12 to 15 The utility model is characterized in that: a driving gear 4 is provided, the driving gear 4 is fastened to the fork handle 1a of the jaw guard 1 or it is made of an integral structure with the fork handle 1a of the jaw guard 1, and the driving gear 4 and the jaw guard 1 both rotate around the first axis O1 (as shown in FIG. Fig. 9 In addition, a driven gear 5 and a trigger 6 are provided (see Figure 7 and Figure 8 ), the driven gear 5 is fastened to the trigger 6 or the two are made of an integral structure. In particular, the optimal structural layout of the driven gear 5 and the trigger 6 is that they both rotate around the same fixed third axis O3; the driving gear 4 and the driven gear 5 of the utility model are meshed with each other, the trigger 6 is provided with a first pushing structure 6a, and the leg 2a of the shield 2 is provided with a bearing edge 2b (such as Figures 1 to 3 As shown); when the jaw guard 1 is flipped back from the half-helmet structure position to the full-helmet structure position (see Fig.10 ): Fig.10 (a) shows the state where the chin guard 1 is in the half-helmet structure position, where the chin guard 1 is located at the upper rear portion of the helmet 3; Fig.10 (b) In the initial stage of flipping the chin guard 1 from the half-helmet structure position to the full-helmet structure position and starting to climb over the dome of the helmet 3, the trigger 6 starts to rotate under the drive of the driven gear 5, and during the rotation, the first pushing structure 6a thereof can touch the bearing edge 2b on the leg 2a of the shield 2, so that the leg 2a of the shield 2 is pushed and causes the shield 2 to leave the fully buckled position state or even to be fully opened to the fully opened position state, wherein the scene when the shield 2 begins to leave the fully buckled position is as shown in FIG. Fig.12 As shown, the scene of the response shield 2 being opened to the fully open position is as follows Fig.13 As shown here, Fig.12 (a) is an axonometric view of the trigger 6 pushing and opening the shield 2 in the initial stage. Fig.12 (b) Yes Fig.12(a) Cross-sectional view of the situation, similarly Fig.13 (a) is an isometric view of the trigger 6 pushing the shield 2 in a fully opened state, and Fig.13 (b) Yes Fig.13 (a) Cross-sectional view of the scenario; Fig.10 (c) to Fig.10 (f) correspond to the jaw guard 1 starting to cross the fully opened shield 2, the jaw guard 1 having crossed the fully opened shield 2, the jaw guard 1 starting to sit close to the body of the helmet 3, and the jaw guard 1 having completely sat in the full helmet structure position. It can be seen that the driving gear 4 of the utility model rotates around the first axis O1 and drives the driven gear 5 to rotate around the third axis O3 through meshing, and then the driven gear 5 drives the trigger 6 to rotate, and then the rotation of the trigger 6 will cause the first push structure 6a to also make a rotational movement, and during the rotation of the trigger 6, the first push structure 6a can touch the bearing edge 2b on the leg, so the first push structure 6a drives the shield 2 to open through the bearing edge 2b of the leg 2. It should be noted that when the jaw guard 1 is in the full helmet structure position or the half helmet structure position, the shield 2 opening mechanism of the utility model does not hinder the shield 2 from performing general opening and buckling operations, because the ratio of the number of teeth of the driven gear 5 to the number of teeth of the driving gear 4 can be between 0.45-0.55, and within this range, the first push structure 6a, the second push structure 6b and the body of the trigger 6 can be conveniently arranged and designed, and they will not hinder the shield 2 from being completely buckled when the jaw guard 1 is in the full helmet structure position or the half helmet structure position. Obviously, the utility model realizes the opening of the shield 2 by means of gear drive combined with the prying of the trigger 6, and reliably realizes the shield 2 being opened in advance to avoid the jaw guard 1 in the buckling and resetting process, thereby avoiding the jaw guard 1 from hitting the shield 2, which not only protects the shield 2 from damage but also improves the working reliability of the shield 2 opening mechanism, and also improves the safety and stability of the use of the helmet 3.

[0031] Furthermore, the trigger 6 of the present invention is provided with a second push structure 6b, when the chin guard 1 is flipped from the full helmet structure position to the half helmet structure position to make an opening action (see Fig.11 ): Fig.11 (a) is the state where the chin guard 1 is in the full helmet structure position, at which time the chin guard 1 is located at the front lower part of the helmet 3, and the shield 2 is in a completely buckled state and buckled on the chin guard 1; Fig.11 (b) The initial stage of flipping the jaw guard 1 from the full helmet structure position to the half helmet structure position. In this stage, the second push structure 6b of the trigger 6 begins to touch the bearing edge 2b of the leg 2a of the shield 2, so the shield 2 begins to be opened under the joint push of the jaw guard 1 and the trigger 6. This initial stage corresponds to Fig.14 (a) and 14 (b), and in a very short time, the shield 2 is quickly opened to a fully opened state under the push of the trigger 6. Fig.15 (a) and 15 (b), it should be noted that during this stage, the angular velocity of the opening action of the shield 2 is much higher than the angular velocity of the flipping action of the jaw guard 1, wherein Fig.14 (a) is an axonometric view of the trigger 6 pushing the fork handle 2a of the shield 2 at the initial stage, and Fig.14 (b) Yes Fig.14 (a) Cross-sectional view of the case, Fig.15 (a) is an isometric view of the trigger 6 pushing the fork handle 2a and causing the shield 2 to be fully opened. Fig.15 (b) Yes Fig.15 (a) Cross-sectional view of the case; Fig.11 (c) to Fig.11 (f) respectively correspond to the jaw guard 1 starting to cross over the shield 2 in the fully open state, the jaw guard 1 having crossed over the shield 2 in the fully open state, the jaw guard 1 starting to cross over the dome of the helmet 3, and the jaw guard 1 having completely sat against the upper rear of the helmet 3 to reach the half-helmet structure position. It can be seen that the active gear 4 of the utility model drives the driven gear 5 to generate rotational motion, and drives the trigger 6 to rotate through the driven gear 5, and then the rotation of the trigger 6 will cause the second pushing structure 6b to rotate, and during the rotation of the trigger 6, the second pushing structure 6b can touch the bearing edge 2b on the leg 2a of the shield 2, so that the second pushing structure 6a drives the shield 2 to open through the bearing edge 2b of the leg 2a. Furthermore, the utility model is also provided with a damping gear 7, and the damping gear 7 is meshed with the active gear 4 (not shown in the figure), or the damping gear 7 is meshed with the driven gear 5 (as shown in the figure). Figure 1 , Figure 3 , Fig. 9 , Figures 12 to 15 As shown in the figure, the damping gear 7 can achieve the effect of slowing down by means of friction, blocking, tripping, etc., and in particular, damping functional materials such as damping grease can be configured on the damping gear 7. The advantage of providing the damping gear 7 is that the movement noise of each moving part can be effectively eliminated, and the jaw guard 1 or the shield 2 can be temporarily stopped in an appropriate place when necessary, such as a slightly opened position or a half-opened position, etc. These open states are very meaningful for both the shield 2 and the jaw guard 1, because when the driver temporarily stops to rest, he can conveniently complete ventilation to remove the fog in the helmet 3, or have conversations and observations without completely opening the jaw guard 1 or the shield 2, which is beneficial to the comfort and convenience of wearing the helmet 3.

[0032] Compared with the prior art, the utility model has the following outstanding advantages in that a driving gear 4 with a fixed axis rotation is arranged on the fork handle 1a of the jaw guard 1 to mesh and drive the driven gear 5, and then a trigger 6 which is fastened to the driven gear 5 or is made as an integral structure is driven to rotate, so that the first pushing structure 6a on the trigger 6 touches and drives the bearing edge 2b on the leg 2a of the shield 2 so that the shield 2 can be opened and separated from its buckled position, thereby making the shield 2 avoid the falling jaw guard 1 when the jaw guard 1 flips from the half-helmet structure position to the full-helmet structure position, and finally achieving the positive effect of preventing the shield 2 from being hit by the jaw guard 1. Not only the working reliability of the shield 2 opening mechanism is effectively improved, but also the safety and stability of the use of the helmet 3 can be improved.

[0033] The above embodiments are only some preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A helmet shield opening mechanism capable of avoiding impact of a variable jaw guard, comprising a jaw guard and a shield, wherein the jaw guard comprises a fork handle, and the shield comprises legs; the jaw guard and the fork handle can perform fixed-axis rotational motion, and the shield and the legs can perform swinging motion; the characteristics are: The helmet shield opening mechanism also includes a driving gear, a driven gear and a trigger; the driving gear is fastened to the fork handle of the jaw guard or the driving gear and the fork handle of the jaw guard are made of an integral structure, and the driving gear and the jaw guard rotate around the same axis; the driven gear is fastened to the trigger or the two are made of an integral structure; the driving gear is meshed with the driven gear, the trigger is provided with a first pushing structure, and the support leg of the shield is provided with a bearing edge; when the jaw guard flips and returns from the half-helmet structure position to the full-helmet structure position, the driving gear rotates around the fixed axis and drives the driven gear to rotate, the driven gear drives the trigger to rotate, the rotation of the trigger prompts the first pushing structure to also rotate, and during the rotation of the trigger, the first pushing structure can touch the bearing edge on the support leg, and the first pushing structure drives the shield to open by pushing the bearing edge of the support leg.

2. A helmet shield opening mechanism capable of avoiding impact of a variable jaw guard according to claim 1, characterized in that: The movement performed by the driven gear is fixed-axis rotation.

3. The helmet shield opening mechanism capable of avoiding impact of a variable jaw guard according to claim 2, characterized in that: The trigger is provided with a second pushing structure. When the jaw guard flips from the full-helmet structure position to the half-helmet structure position to perform an opening action, the driving gear drives the driven gear to generate a rotational motion, and drives the trigger to rotate through the driven gear. Then the rotation of the trigger will cause the second pushing structure to rotate, and during the rotation of the trigger, the second pushing structure can touch the bearing edge on the support leg, so that the second pushing structure drives the shield to perform an opening action through the bearing edge of the support leg.

4. A helmet shield opening mechanism capable of avoiding impact of a variable jaw guard according to any one of claims 1 to 3, characterized in that: A damping gear is also included, and the damping gear is meshed with the driving gear or the driven gear.

5. The helmet shield opening mechanism capable of avoiding impact of a variable jaw guard according to claim 4, characterized in that: Damping grease is arranged on the damping gear.

6. The helmet shield opening mechanism capable of avoiding impact of a variable jaw guard according to any one of claims 1 to 3, characterized in that: The swinging motion of the guard cover and its legs is fixed-axis rotation.

7. The helmet shield opening mechanism capable of avoiding impact of a variable jaw guard according to any one of claims 1 to 3, characterized in that: The ratio of the number of teeth of the driven gear to the number of teeth of the driving gear is in the range of 0.45-0.55.

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