CN117562332A - Helmet buffer structure based on shear thickening material - Google Patents

Abstract

The invention discloses a helmet buffer structure based on a shear thickening material, which is arranged between a helmet and a neck support and comprises a ball joint seat, a buffer ball joint mechanism and a fixed base, wherein the ball joint seat is fixedly connected with the lower edge of the helmet, one end of the buffer ball joint mechanism is contacted with the ball joint seat, the other end of the buffer ball joint mechanism is connected with the fixed base, the fixed base is contacted with the neck support, the normal rotation of the head is not influenced, the connecting end of the buffer ball joint mechanism and the ball joint seat is a spherical surface, the ball joint seat is provided with a groove matched with the spherical surface of the buffer ball joint mechanism, the buffer ball joint mechanism can move and rotate in the groove, and the weight of the helmet is transferred to the neck support through the buffer structure and then transferred to the shoulder of a wearer through the neck support. The invention can not limit the rotation angle of the helmet when the helmet rotates, can realize the left and right head turning operation of a wearer, has no limited visual field, and can realize that the helmet can provide effective support and protection when impacted in any direction.

Description

Helmet buffer structure based on shear thickening material

Technical Field

The invention relates to a helmet buffer structure, in particular to a helmet buffer structure based on a shear thickening material.

Background

Helmets play a very large role as head gear in production and life. However, as more and more demands are placed on the function of helmets, the number of pieces of equipment mounted on the helmet is gradually increased, which in turn results in an increase in the weight of the helmet. When wearing the helmet with a large weight for a long time, people feel tired, the neck is ache, even the spine is damaged, if the load applied to the neck is transferred to the shoulder, the shoulder bears the weight of part of the helmet, and the people can feel much relaxed. Meanwhile, when the load is in a large overload condition such as impact, the load transfer mechanism (buffer mechanism) can solve most of kinetic energy, reduce the damage to the neck, and better protect the wearer.

Currently, helmet load transfer mechanisms (cushioning mechanisms) are used at best in HANS systems for protecting riders in formula F1 racing cars, which clamp a carbon bracket against the shoulder of the rider and secure its upper end to the helmet, with a retaining buckle provided on the helmet and tied to the bracket via a slip-line strap. The carbon support structure has the advantages of simplicity, reliability, low weight cost and the like, but has certain limitations, and is mainly expressed in the following 2 aspects: on the one hand, the structure is limited by the installation form of the structure, and can only protect a wearer from being influenced by large overload in the front-rear direction, and if side impact occurs, the structure cannot provide enough support and protection; on the other hand, the lower edge of the helmet is lower than the lateral shoulder pad of the structure, so that the left-right turning operation cannot be realized, the visual field of a wearer is greatly limited, and the overall flexibility is greatly reduced.

In summary, the current helmets have the following drawbacks:

a. when other modules are needed to be additionally arranged on the helmet due to special scenes, the excessive weight of the helmet can press the neck of a wearer, and the neck can be injured or muscle is damaged when the helmet with the large weight is worn for a long time.

b. In most traffic accidents, a significant part of the cause of death or paralysis of the driver even if the helmet is worn is that the helmet can protect the head but not the same important neck under high acceleration, and the neck of the driver can be fatally injured under excessive impact.

c. The protection device integrally connected with the helmet and the shoulder and neck can protect the head and the neck at the same time, but can limit the normal rotation of the head of a wearer, so that the field of view of the wearer is limited, and the whole equipment is large and heavy and is very inconvenient to put on and take off.

Disclosure of Invention

The invention aims to provide a helmet buffer structure based on a shear thickening material, which solves the problems in the background art.

The technical solution for realizing the purpose of the invention is as follows:

the utility model provides a helmet buffer structure based on shear thickening material installs between helmet and neck brace, includes ball joint seat, buffering ball joint mechanism and unable adjustment base, border fixed connection under ball joint seat and the helmet, buffering ball joint mechanism one end and ball joint seat contact, the other end is connected with unable adjustment base, unable adjustment base and neck brace contact, do not influence the normal rotation of head, buffering ball joint mechanism is spherical with the link of ball joint seat, ball joint seat be equipped with the recess of buffering ball joint mechanism spherical adaptation, buffering ball joint mechanism can remove and rotate in the recess, shifts the weight of helmet to the neck brace through this buffer structure, shifts to the wearer's shoulder by the neck brace again.

Further, the buffering ball joint mechanism includes, ball joint, buffer layer, filling liquid coating and first adhesive linkage, with the ball joint be spherical, the ball joint is located the inboard, arranges the buffer layer jointly on for reduce buffering ball joint mechanism and remove resistance in the ball joint seat, ball joint does not take place deformation when the pressurized, the buffer layer is used for reducing the impact force that receives, filling liquid coating is located between buffer layer and the first adhesive linkage, and its intussuseption is filled with filling liquid, and filling liquid coating warp and alleviates the impact force that receives when the filling liquid coating is pressurized, and prevent through the filling liquid that the filling liquid coating breaks.

Further, polytetrafluoroethylene is adopted, and the ball joint is made of aluminum alloy.

Further, the buffer layer is made of artificial cartilage impact resistant materials.

Further, the filling liquid is shear thickening liquid, and the filling liquid coating layer adopts silicon rubber.

Further, the first adhesive layer is made of 3M pressure sensitive adhesive and covers the whole bottom of the buffering ball joint mechanism; the ball joint, the buffer layer and the filling liquid coating layer are all bonded through 3M glue.

Further, unable adjustment base includes two-layer second adhesive linkage and anti deformation layer, and anti deformation layer is located between two-layer second adhesive linkage, and wherein one deck second adhesive linkage is the same and the adhesion with first adhesive linkage area, anti deformation layer adopts the polyester plastic.

Further, the ball joint seat is made of high-toughness nylon material and is buckled on the lower edge of the helmet through a U-shaped clamping groove.

Further, the helmet buffer structures are 4, wherein 2 are symmetrically distributed on the left side and the right side of the helmet, the other 2 are symmetrically distributed on the rear side of the helmet, and the resultant force directions of the 4 helmet buffer structures point to the gravity center of the helmet.

Further, the length of the filling liquid coating layer of the buffer structures at the left side and the right side of the helmet is 22mm, and the contact surface area of the fixed base and the neck guard is 428mm ^2， The length of the filling liquid coating layer of the buffer structure at the rear side of the helmet is 12mm, and the contact surface area of the fixed base and the neck guard is 220mm ² The method comprises the steps of carrying out a first treatment on the surface of the The 4 helmetsThe equivalent ball diameters of the buffer structure are 13mm, the equivalent ball diameters of the ball joints are 11mm, and the thicknesses of the buffer layer and the filling liquid coating layer are 1mm.

Compared with the prior art, the invention has the following effects:

a. when the helmet is worn with large weight, the weight of the helmet can be borne by the shoulders and the neck through the form of load transfer, so that the problem of neck injury of a wearer caused by wearing the helmet with large weight for a long time can be effectively avoided;

b. when a specific event such as collision occurs, the mechanism can convert the kinetic energy of the helmet under the condition of large overload into heat energy, and the neck of a wearer is protected from injury;

c. the mechanism is independently fixedly connected with the lower edge of the helmet, has contact relation with the neck support, is convenient to put on and take off, does not influence the rotation of the head of a wearer, and is light in material, small in size and convenient to carry.

Drawings

FIG. 1 is a schematic view of a buffer structure according to the present invention.

FIG. 2 is a cross-sectional view of a buffer structure according to the present invention.

Fig. 3 is a cross-sectional view of a fixing base in the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

According to the invention, 4 load transfer mechanisms (buffer mechanisms) are added between the helmet and the neck rest, and are respectively positioned at the left side, the right side and the rear side facing the direction, and the supporting force at 4 positions is directed to the gravity center of the helmet. Because the 4 mechanisms are in a flexible state under the condition of no impact and are not fixedly connected with the neck support, the rotation angle of the helmet is not limited when the helmet rotates, the left and right head turning operation of a wearer can be realized, and the visual field is not limited; in the plane direction, the two pairs of mechanisms are distributed on two sides of the gravity center, so that effective support and protection can be provided for the helmet when the helmet is impacted in any direction, and the helmet is not only in the front-rear direction. Referring to fig. 1 to 3, a buffering structure in an embodiment of the invention includes a ball joint seat 1, a buffering ball joint mechanism 2 and a fixing base 3.

As shown in fig. 1, the ball joint seat 1 is made of a high-toughness nylon material, is buckled on the lower edge of the helmet through a U-shaped clamping groove, has certain ductility and high toughness according to material characteristics, and can ensure that the structure is not damaged when in larger instantaneous overload. The ball joint seat 1 and the buffering ball joint mechanism 2 are in contact but not connected, namely the buffering ball joint mechanism 2 can generate displacement and rotation in the ball joint seat 1. The buffer ball joint mechanism 2 and the fixed base 3 are connected in an adhesive mode.

Fig. 2 is a cross-sectional view of the buffering ball joint mechanism 2, which is composed of a low-resistance layer 21, a ball joint 22, a buffering layer 23, a filling liquid 24, a filling liquid coating layer 25 and a first bonding layer 26 from top to bottom, wherein the low-resistance layer 21 and the ball joint 22, the ball joint 22 and the buffering layer 23, and the buffering layer 23 and the filling liquid coating layer 25 are bonded by 3M glue, and it is noted that different buffering gaps can be dealt with by changing the length and the size of each part.

In the present invention, as shown in fig. 2, the low resistance layer 21 is made of polytetrafluoroethylene, which enables the cushion ball joint mechanism 2 to have a small resistance to movement in the ball joint seat and to have little influence on the rotation of the head of the wearer. The ball joint 22 is made of aluminum alloy to ensure that the top of the structure is not deformed during the overall compression set. The buffer layer 23 is made of an artificial cartilage impact resistant material ACF, and can absorb more than 90% of impact force due to the material property, so that the impact capability is converted into insignificant heat energy. The energy absorption principle of the ACF material is to realize time delay, stress dispersion and energy dissipation through deformation of a multi-stage bionic energy absorption structure, so that the damage caused by impact, collision, vibration, explosion and the like is solved to the greatest extent. Basic properties of the material are utilized: the multistage pore and viscoelasticity are selected by the basic raw materials, so that under the condition of being impacted by external force, the energy generated by impact is dissipated or absorbed by friction, bending (or torsion) and elastoplastic (or viscoelasticity) hysteresis deformation in the material, and then the energy is converted into heat energy, and meanwhile, the energy is released smoothly to prolong the time of speed change, thereby achieving the aim of reducing the impact force as much as possible.

The filler fluid 24 is a shear thickening fluid that is normally quite soft and upon high-speed impact or extrusion, the material becomes rigid and digests external forces. When the external force is removed, the material returns to its original soft state, and has a strong impact absorbing capability. The packing liquid coating layer 25 is made of silicon rubber, specifically, when the top of the buffer ball joint is pressed, the packing liquid coating layer 25 is compressed downwards, the volume of the bottom cavity is increased, and the packing liquid 24 flows to the bottom cavity, so that the helmet can swing around and back and forth without limitation under the normal state. When the silicon rubber is deformed, the shearing thickening fluid can flow in the silicon rubber, and the situation that a local cavity is formed or the material is broken and fails due to excessive pressure is avoided

The first adhesive layer 26 is made of 3M pressure sensitive adhesive, and it should be noted that the first adhesive layer 26 should cover the entire bottom of the cushioned ball joint mechanism 2.

In the present invention, as shown in fig. 3, the fixing base 3 is composed of a second adhesive layer 31 and an anti-deformation layer 32.

The second adhesive layer 31 is made of 3M pressure sensitive adhesive, and it should be noted that the second adhesive layer 31 on the side to which the cushion ball joint is adhered only retains the same size portion as the first adhesive layer 26, and the other side is full according to the specific size of the adhered area. The deformation-resistant layer 32 is made of polyester plastic and is of a material with high strength so that the base will not deform when impacted, giving cushioning ball joint support

In this embodiment, 4 buffer structures are disposed at the gap between the helmet and the neck guard, wherein the gap between the left buffer structure and the right buffer structure is larger due to the gap between the neck guard and the lower edge of the helmet, the length of the filling liquid coating layer 25 is up to 22mm, and the length of the filling liquid coating layer 25 is 12mm due to the smaller gap between the two buffer structures.

In this embodiment, the equivalent spherical diameter of the low-resistance layer 21 of the 4-position buffer structure is 13mm, the equivalent spherical diameter of the ball joint 22 is 11mm, and the thicknesses of the low-resistance layer 21, the buffer layer 23 and the filling liquid coating layer 25 are all 1mm.

In the embodiment, the shape of the fixing base 3 is different at the corresponding position because the shape of the neck guard is different at the left and right parts and the shape of the back neck, wherein the contact surface area between the fixing base 3 and the neck guard at the left and right parts is 428mm ² The two areas of the back neck are 220mm ² It should be noted that, the contact surface between the fixing base and the neck guard should be as round as possible, so as to avoid the situation of unstable adhesion caused by complex curved surfaces.

In this embodiment, the resultant force directions of the buffer structures are directed toward the center of gravity of the helmet, i.e. the helmet wearer can rotate his head to any angle, and one or more buffer structures provide supporting force to the helmet, so as to ensure that the weight of the helmet part is transferred to the shoulder of the wearer. The weight of the helmet is transferred to the neck support by the mechanism in a force transmission mode, and then the weight born by the neck is reduced by transferring the weight to the shoulder of a wearer by the neck support; the mechanism converts kinetic energy into heat energy for dissipation when the helmet is subjected to larger acceleration through the combination form of the internal impact-resistant materials, and meanwhile, the strength is increased when the helmet is impacted to prevent the helmet from producing larger displacement to strain the neck of a wearer. The mechanism is fixedly connected with the lower edge of the helmet, and the other end of the ball head is propped against the neck support, so that the normal rotation of the head is not influenced.

According to the invention, the helmet with larger weight can be worn by using the buffer structure at a plurality of positions in the gap between the helmet and the neck guard, and when the helmet is subjected to instantaneous larger load, the buffer structure plays a role in protecting the neck of a wearer from injury, so that the requirement of the neck of the wearer on the protection performance is met.

The structural description of the invention is as follows: the ball joint and polytetrafluoroethylene layer at the front part of the buffer structure enable the load transfer mechanism (buffer mechanism) to move freely on the neck rest without being blocked, i.e. the mechanism does not influence the free rotation of the head of a helmet wearer; the artificial cartilage impact-resistant material ACF can absorb more than 90% of impact force and instantaneously convert impact energy into insignificant heat energy. The energy absorption principle is that the deformation of the multi-stage bionic energy absorption structure is used for realizing time delay, stress dispersion and energy dissipation, so that the damage caused by impact, collision, vibration, explosion and the like is solved to the maximum extent. Basic properties of the material are utilized: the multistage pore and viscoelasticity are selected by the basic raw materials, so that under the condition of being impacted by external force, the energy generated by impact is dissipated or absorbed by friction, bending (or torsion) and elastoplastic (or viscoelasticity) hysteresis deformation in the material, and then the energy is converted into heat energy, and meanwhile, the energy is released smoothly to prolong the time of speed change, thereby achieving the aim of reducing the impact force as much as possible. The silicone rubber sleeve can have larger deformation, displacement and extrusion generated between the buffer structure and the neck support do not influence the rotation of the helmet, the internally filled shear thickening fluid is very soft in a normal state, and once the high-speed collision or extrusion is encountered, the material becomes hard so as to digest external force. When the external force is removed, the material returns to its original soft state, and has a strong impact absorbing capability. The 3M glue connects the buffer structure with the base.

The working principle of the invention is as follows: the buffering structure is adhered to the base through 3M glue, the base is connected with the lower edge of the helmet through a buckle mode, and the head of the mechanism is contacted with the neck support. Under normal conditions, the helmet rotates, extrusion translation is generated between the buffer structure and the neck support, self-adaptive performance of deformation of the buffer structure is achieved, and meanwhile, the weight of the helmet is transferred to the neck guard through the structure and is born by the shoulders of a wearer, so that a load transfer function is realized. When the helmet is impacted in a certain direction, due to the fact that the acceleration is large, the kinetic energy is firstly transferred to the ACF artificial cartilage material, a part of the kinetic energy is converted into the internal energy, when the residual kinetic energy is transferred to the shearing thickening fluid, the strength of the shearing thickening fluid under the condition of large overload of the residual kinetic energy is rapidly enhanced, the corresponding resistance is generated, most of the kinetic energy is absorbed, and finally the residual kinetic energy is little when the kinetic energy is transferred to the neck support and is borne by shoulders, so that the function of shock resistance and neck protection is achieved. When the silicone rubber is deformed, the shear thickening fluid can flow inside, and the situation that a local cavity is formed or the material is broken and fails due to excessive pressure is avoided.

The invention has the following effective effects: 1. under the normal wearing condition, the weight of the helmet can be transferred to the neck support, and the shoulder of the wearer bears the gravity to realize load transfer; 2. the omnidirectional support and protection are provided, meanwhile, the rotation and flexibility of the helmet are not influenced, and the whole structure is light in weight; 3. when the helmet is impacted, the instantaneous strength of the internal material is increased, the kinetic energy is converted into the internal energy, and the neck injury of the wearer caused by excessive acceleration is prevented.

The foregoing has outlined and described the basic principles, features, and advantages of the present invention. It will be understood by those skilled in the art that the foregoing embodiments are not intended to limit the invention, and the above embodiments and descriptions are meant to be illustrative only of the principles of the invention, and that various modifications, equivalent substitutions, improvements, etc. may be made within the spirit and scope of the invention without departing from the spirit and scope of the invention.

Claims (10)

1. Helmet buffer structure based on shear thickening material installs between helmet and neck brace, a serial communication port, including ball joint seat (1), buffering ball joint mechanism (2) and unable adjustment base (3), border fixed connection under ball joint seat (1) and the helmet, buffering ball joint mechanism (2) one end and ball joint seat (1) contact, and the other end is connected with unable adjustment base (3), unable adjustment base (3) and neck brace contact, do not influence the normal rotation of head, buffering ball joint mechanism (2) are spherical with the link of ball joint seat (1), ball joint seat (1) be equipped with buffering ball joint mechanism (2) spherical face adaptation's recess, buffering ball joint mechanism (2) can remove and rotate in the recess, shifts the weight of helmet to the neck brace through this buffer structure, is shifted to the wearer's shoulder by the neck brace again.

2. Helmet cushioning structure based on a shear thickening material according to claim 1, characterized in that the cushioning ball joint mechanism (2) comprises a low-resistance layer (21), a ball joint (22), a cushioning layer (23), a filling liquid (24), a filling liquid coating layer (25) and a first adhesive layer (26), wherein the low-resistance layer (21) and the ball joint (22) are spherical surfaces, the ball joint (22) is located inside the low-resistance layer (21) and is jointly placed on the cushioning layer (23), the low-resistance layer (21) is used for reducing the movement resistance of the cushioning ball joint mechanism (2) in the ball joint seat (1), the ball joint (22) is not deformed when being pressed, the cushioning layer (23) is used for reducing the impact force received, the filling liquid coating layer (25) is located between the cushioning layer (23) and the first adhesive layer (26), the filling liquid coating layer (24) is deformed when being pressed, the impact force received is relieved, and the filling liquid coating layer (25) is prevented from being broken by the filling liquid coating layer (24).

3. Helmet cushioning structure based on a shear thickening material according to claim 2, characterized in that the low-resistance layer (21) is made of polytetrafluoroethylene and the ball joint (22) is made of an aluminium alloy.

4. Helmet cushioning structure based on a shear thickening material according to claim 2, characterized in that the cushioning layer (23) is made of an artificial cartilage impact resistant material.

5. Helmet cushioning structure based on a shear thickening material according to claim 2, characterized in that the filling liquid (24) is a shear thickening liquid, and the filling liquid coating (25) is made of silicone rubber.

6. Helmet cushioning structure based on a shear thickening material according to claim 2, characterized in that the first adhesive layer (26) is made of 3M pressure sensitive adhesive covering the entire bottom of the cushioning ball-joint mechanism (2); the low-resistance layer (21) is adhered to the ball joint (22), the ball joint (22) is adhered to the buffer layer (23), and the buffer layer (23) is adhered to the filling liquid coating layer (25) through 3M glue.

7. Helmet cushioning structure based on a shear thickening material according to claim 2, characterized in that the fixing base (3) comprises two layers of second adhesive layers (31) and an anti-deformation layer (32), the anti-deformation layer (32) is located between the two layers of second adhesive layers (31), wherein the areas of one layer of second adhesive layers (31) and the first adhesive layer (26) are the same and are adhered, and the anti-deformation layer (32) is made of polyester plastic.

8. The helmet buffer structure based on the shear thickening material according to claim 2, wherein the ball joint seat (1) is made of high-toughness nylon material and is buckled on the lower edge of the helmet through a U-shaped clamping groove.

9. A helmet cushioning structure according to any one of claims 2-8, wherein said helmet cushioning structure is 4, 2 of said helmet cushioning structures are symmetrically disposed on the left and right sides of the helmet, and 2 of said helmet cushioning structures are symmetrically disposed on the rear side of the helmet, and the resultant force of said 4 helmet cushioning structures is directed toward the center of gravity of the helmet.

10. Helmet buffer structure based on shear thickening material according to claim 9, characterized in that the length of the filling liquid coating layer (25) of the buffer structure on the left and right sides of the helmet is 22mm, and the contact surface area of the fixing base (3) and the neck guard is 428mm ^2， The length of the filling liquid coating layer (25) of the helmet rear side buffer structure is 12mm, and the contact surface area of the fixed base (3) and the neck guard is 220mm ² The method comprises the steps of carrying out a first treatment on the surface of the The equivalent ball diameters of the low-resistance layers (21) of the 4 helmet buffer structures are 13mm, the equivalent ball diameters of the ball joints (22) are 11mm, and the thicknesses of the low-resistance layers (21), the buffer layers (23) and the filling liquid coating layers (25) are 1mm.