CN113390295B - Bulletproof helmet - Google Patents

Abstract

The invention relates to the technical field of bulletproof devices, and provides a bulletproof helmet, comprising an outer shell and an inner shell, the outer shell is provided with a bulletproof layer, the inner shell is provided with a buffer layer, and the buffer layer includes a first buffer group contacting the top of the wearer's head, and a second buffer group contacting other parts of the wearer except the top of the head, the first buffer group and the second buffer group both include a plurality of buffer pads, and the plurality of buffer pads in the first buffer group are not connected, and the first buffer group includes a plurality of buffer pads. The two adjacent buffer pads of the two buffer groups are connected; using this technical solution, the first buffer group and the second buffer group and their arrangement methods jointly realize the comfort of the bulletproof helmet, and the bulletproof helmet located on the outside of the buffer layer is Layers achieve the protection of a bulletproof helmet.

Description

bulletproof helmet

technical field

The invention relates to the technical field of bulletproof devices, in particular to a bulletproof helmet.

Background technique

Bulletproof helmet is a protective equipment that can absorb and dissipate bullet energy, prevent penetration and effectively protect the human head. The performance of bulletproof helmets includes bulletproof performance and protective performance. Among them, bulletproof performance refers to the anti-penetration performance of bulletproof helmets to bullets, and protective performance refers to the non-penetration resistance of bulletproof helmets to human heads when bullets do not penetrate bulletproof helmets. Injury (blunt injury) performance.

According to different bulletproof materials, bulletproof helmets are divided into soft bulletproof helmets, hard bulletproof helmets and soft and hard composite bulletproof helmets. These bulletproof helmets can block the penetration of bullets and have excellent bulletproof performance. However, the penetrating energy of the bullet will be transmitted to the head of the human body along the bulletproof helmet in the form of stress waves, thereby causing blunt damage to the head of the human body in varying degrees. Therefore, a buffer layer (such as EVA, EPE, PU and PC, etc.) is usually added to the bulletproof helmet to weaken the impact of the bullet on the human head, but these materials are less comfortable and the protective performance needs to be improved. Affects the comfort and protection of bulletproof helmets when worn.

How to effectively solve the above technical problems is a problem that those skilled in the art need to solve.

Contents of the invention

In order to solve the above technical problems or at least partly solve the above technical problems, the present invention provides a bulletproof helmet;

The bulletproof helmet comprises an outer shell and an inner shell, the outer shell is provided with a bulletproof layer, and the inner shell is provided with a buffer layer;

The cushioning layer includes a first cushioning group that contacts the top of the wearer's head, and a second cushioning group that contacts the rest of the wearer except the top of the head;

Both the first buffer group and the second buffer group include a plurality of buffer pads, the plurality of buffer pads of the first buffer group are not connected, and the adjacent two of the second buffer group The buffer pads are connected between each other.

Optionally, the multiple buffer pads of the first buffer group include a first buffer pad, and there are second buffer pads, third buffer pads, and fourth buffer pads around the first buffer pads. A buffer gasket and a fifth buffer gasket;

When two adjacent cushioning pads in the second cushioning group are connected, a circular distribution horizontally surrounding the wearer's head is formed.

Optionally, a first protrusion, a second protrusion, a third protrusion and a fourth protrusion are provided on the surface of the outer shell away from the inner shell side;

The positions of the first protrusion and the second protrusion are opposite on the same straight line, and the positions of the third protrusion and the fourth protrusion are horizontally opposite;

The first protrusion is close to the wearer's forehead, and the third protrusion is close to the wearer's right ear.

Optionally, the preparation method of the buffer layer includes:

The step of preparing the first substance includes mixing boric acid and polydimethylsiloxane to obtain the first substance;

The step of preparing the second substance is to process the first substance to obtain the second substance;

The step of preparing the buffer layer material is to process the second substance to obtain the buffer layer material;

In the step of preparing a buffer layer sheet, the buffer layer material is filled into the hollow silica gel body to form a buffer layer sheet.

Optionally, in the step of preparing the first substance, the mixed treatment of boric acid and polydimethylsiloxane includes: weighing boric acid and polydimethylsiloxane with a mass ratio of 1:4 to 1:6 base siloxane, put boric acid and polydimethylsiloxane into a flask, and stir at a temperature of 22.5°C to 26.3 for 1.5h to 2.5h;

In the step of preparing the second substance, the chemical reaction of the first substance in a vacuum environment includes: performing a heating reaction on the first substance at a temperature of 142°C to 207°C for 2h to 3h ;

In the step of preparing the buffer layer material, the processing of the second substance includes: adding the second substance into a vacuum distillation device for dehydration treatment, and the dehydration time is 1.5h to 2h;

In the step of preparing the buffer layer sheet, the hollow silica gel has a concave honeycomb structure.

Optionally, the preparation method of the bulletproof layer comprises:

The step of preparing the first material includes treating the ultra-high molecular weight polyethylene fibers to obtain the first material;

The step of preparing a second material includes processing the first material to obtain a second material;

The trimming step includes trimming the second material to obtain a bulletproof layer.

Optionally, in the step of preparing the first material, the processing of the ultra-high molecular weight polyethylene fibers includes making 31 layers of ultra-high molecular weight polyethylene fiber non-woven fabrics with a single layer thickness of 0.015 cm according to the shape of a bulletproof helmet Folded in the bulletproof helmet thermoforming mold, at a temperature of 120°C to 140°C and a pressure of 19MPa to 32MPa, heat preservation and pressure treatment for 15min to 25min;

In the step of preparing the first material, the processing of the first material includes taking the first material out of the helmet hot-press forming mold, putting it into the helmet cold-press forming mold, and Under the pressure of 28MPa, pressurize for 5min to 10min.

Optionally, the hollow silica gel includes a plurality of honeycomb lattices, and the plurality of honeycomb lattices are combined into a rectangle;

Connectors are provided between two adjacent honeycomb grids in the horizontal direction, and direct connection between two adjacent honeycomb grids in the vertical direction.

Optionally, the honeycomb grid includes a first edge, and a second edge arranged parallel to the first edge;

A third edge and a fourth edge are respectively arranged between the first edge and the second edge;

The third edge is provided with a first protrusion protruding toward the fourth edge side, and the fourth edge is provided with a second protrusion protruding toward the third edge side.

Optionally, the thickness of the hollow silica gel is 0.4cm to 0.7cm;

The thickness of the honeycomb grid near the first raised portion and the second raised portion is greater than the thickness of the honeycomb grid near the first edge and the second edge.

In the present invention, the first buffer group, the second buffer group and their arrangement methods jointly realize the comfort of the bulletproof helmet. The bulletproof layer positioned at the outer side of the buffer layer realizes the protection of the bulletproof helmet.

Description of drawings

Fig. 1 is the structural representation of bulletproof helmet provided by the present invention;

Fig. 2 is the structural representation of the hollow silica colloid provided by the present invention;

Reference signs:

1. Shell; 11. Bulletproof layer;

2. The fourth protrusion;

3. The first buffer group; 31. The first buffer gasket; 32. The second buffer gasket; 33. The third buffer gasket; 34. The fourth buffer gasket; 35. The fifth buffer gasket;

4. The second protrusion;

5. The buffer layer; 51. The second buffer group;

6. The third protrusion;

7. Inner shell;

8. The first protrusion;

9. Hollow silica gel; 91. Honeycomb lattice; 911. First edge; 912. First raised portion; 913. Second raised portion; 914. Fourth edge; 915. Second edge; 916. Third edge ; 92, connectors.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are some, not all, embodiments of the present invention. The following examples are only used to explain the present invention, but not to limit the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention belong to the protection scope of the present invention. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Terms such as "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, detachable connection, or integrated; it can be mechanical connection or electrical connection; it can be direct connection or It can be connected indirectly through an intermediary. The term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements but also other elements not expressly listed elements, or also elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the statement "comprising..." does not exclude the presence of additional same elements in the process, method, article or device comprising said element.

An embodiment provided by the present invention, as shown in Figure 1, is a bulletproof helmet comprising an outer shell 1 and an inner shell 7, the outer shell 1 is provided with a bulletproof layer 11, and the inner shell 7 is provided with a buffer layer 5;

The buffer layer 5 includes a first buffer group 3 that contacts the top of the wearer's head, and a second buffer group 51 that contacts other parts of the wearer except the top of the head;

The first buffer group 3 and the second buffer group 51 all include a plurality of buffer pads, the plurality of buffer pads of the first buffer group 3 are not connected, and the adjacent two buffer pads of the second buffer group 51 connected.

In this embodiment, the first cushioning group 3 and the second buffering group 51 and their arrangement methods jointly realize the comfort of the bulletproof helmet. The bullet-proof layer 11 positioned at the outside of the buffer layer 5 realizes the protection of the bullet-proof helmet.

In another embodiment provided by the present invention, as shown in FIG. 1 , the plurality of buffer pads of the first buffer group 3 include a first buffer pad 31, and there are second buffer pads 32 around the first buffer pad 31. , the third buffer pad 33, the fourth buffer pad 34 and the fifth buffer pad 35;

When two adjacent cushioning pads in the second cushioning group 51 are connected, a circular distribution around the head of the wearer is formed.

In this embodiment, the buffer pads in the first buffer group 3 are not connected, and under the premise of realizing contact with the top of the wearer's head, the gaps between the buffer pads will be damaged when the bulletproof helmet is attacked by bullets. , the cushioning space is reserved, which further weakens the impact of the bullet on the human head, thereby improving the comfort of the wearer and saving the material cost of the cushioning layer 5 . At the same time, the buffer pads in the second buffer group 51 form a circular distribution around the wearer's head horizontally, which increases the wearer's comfort when the bulletproof helmet is attacked by bullets. That is to say, the first cushioning group 3 and the second cushioning group 51 can jointly reduce the impact of bullets on the head of the human body and improve the wearer's comfort.

In another embodiment provided by the present invention, as shown in FIG. 1 , the surface of the outer shell 1 away from the inner shell 7 is provided with a first protrusion 8 , a second protrusion 4 , a third protrusion 6 and a fourth protrusion 2 ;

The positions of the first protrusion 8 and the second protrusion 4 are opposite on the same straight line, and the positions of the third protrusion 6 and the fourth protrusion 2 are horizontally opposite;

The first protrusion 8 is close to the wearer's forehead, and the third protrusion 6 is close to the wearer's right ear.

In this embodiment, in order to facilitate the wearer to quickly identify the front and back of wearing the bulletproof helmet, the first protrusion 8 and the second protrusion 4 can be provided with identification methods, such as different sizes or indication marks.

In order to further increase the safety of the bulletproof helmet, the surface of each protrusion is also provided with a bulletproof layer 11 . When the bullet strikes the wearer above the side of the wearer, the protrusions in this embodiment can also prevent the bullet from contacting the face of the wearer.

In yet another embodiment provided by the present invention, the preparation method of the buffer layer includes:

The step of preparing the first substance includes mixing boric acid and polydimethylsiloxane to obtain the first substance;

The step of preparing the second substance is to process the first substance to obtain the second substance;

The step of preparing the buffer layer material is to process the second substance to obtain the buffer layer material;

In the step of preparing a buffer layer sheet, the buffer layer material is filled into the hollow silica gel body to form a buffer layer sheet.

The cushioning layer prepared by using the preparation method in this embodiment increases the protection performance for the wearer.

In yet another embodiment provided by the present invention, in the step of preparing the first substance, the mixed treatment of boric acid and polydimethylsiloxane includes: weighing boric acid and polydimethylsiloxane with a mass ratio of 1:4 to 1:6 Methylsiloxane, put boric acid and polydimethylsiloxane into a flask, and stir at a temperature of 22.5°C to 26.3 for 1.5h to 2.5h;

In the step of preparing the second substance, performing a chemical reaction on the first substance in a vacuum environment, including: performing a heating reaction on the first substance at a temperature of 142°C to 207°C for 2h to 3h;

In the step of preparing the buffer layer material, processing the second substance includes: adding the second substance to a vacuum distillation device for dehydration treatment, and the dehydration time is 1.5h to 2h;

In the step of preparing the buffer layer sheet, the hollow silica gel has a concave honeycomb structure.

By using the buffer layer prepared by the preparation method in this example, the blunt impact force of the bullet and the depression depth of the bulletproof helmet are reduced.

In yet another embodiment provided by the present invention, the preparation method of the bulletproof layer comprises:

The step of preparing the first material includes treating the ultra-high molecular weight polyethylene fibers to obtain the first material;

The step of preparing the second material includes processing the first material to obtain the second material;

The trimming step includes trimming the second material to obtain a bulletproof layer.

In this embodiment, the bulletproof performance of the bulletproof layer is improved. The trimming method of trimming the second material can be done by using the shearing process in the prior art.

In yet another embodiment provided by the present invention, in the step of preparing the first material, the ultra-high molecular weight polyethylene fibers are processed, including 31 layers of ultra-high molecular weight polyethylene fiber non-woven fabrics with a single layer thickness of 0.015cm according to the bulletproof helmet The shape is superimposed in the bulletproof helmet thermoforming mold, at a temperature of 120°C to 140°C and a pressure of 19MPa to 32MPa, heat preservation and pressure treatment for 15min to 25min;

In the step of preparing the first material, the first material is processed, including taking the first material out of the helmet hot-press forming mold, putting it into the helmet cold-press forming mold, and performing a pressure treatment at a pressure of 23MPa to 28MPa for 5min to 10min .

In this embodiment, the bulletproof layer prepared by using the preparation method in this embodiment has good flexibility and impact resistance.

In yet another embodiment provided by the present invention, as shown in FIG. 2, the hollow silica gel 9 includes a plurality of honeycomb grids 91, and the plurality of honeycomb grids 91 are combined into a rectangle;

Connectors 92 are provided between two adjacent honeycomb grids 91 in the horizontal direction, and two adjacent honeycomb grids 91 in the vertical direction are directly connected.

In this embodiment, the material of the buffer layer 5 is facilitated to flow in, and the flow of the material of the buffer layer 5 can be restricted within a certain range.

In another embodiment provided by the present invention, as shown in FIG. 1, the honeycomb grid 91 includes a first edge 911, and a second edge 915 arranged parallel to the first edge 911;

A third edge 916 and a fourth edge 914 are respectively arranged between the first edge 911 and the second edge 915;

The third edge 916 is provided with a first protruding portion 912 protruding toward the side of the fourth edge 914 , and the fourth edge 914 is provided with a second protruding portion 913 protruding toward the side of the third edge 916 .

In this embodiment, it is further realized that the material of the buffer layer 5 that is fluid in the natural state is filled in the honeycomb grid 91, and the flow of the material of the buffer layer 5 is limited within a certain range, avoiding the leakage of the buffer layer 5. The material is excessively unevenly distributed under the action of gravity, thereby ensuring the buffering and energy-absorbing performance of the buffering layer 5 .

Each protruding portion can be pointed or arc-shaped.

In another embodiment provided by the present invention, as shown in FIG. 2 , the thickness of the hollow silica gel 9 is 0.4 cm to 0.7 cm;

The thickness of the honeycomb grid 91 between the first raised portion 912 and the second raised portion 913 is greater than the thickness of the honeycomb grid 91 near the first edge 911 and the second edge 915 .

In this embodiment, the contact surface of the honeycomb grid 91 is increased to further play a protective role. The size of the hollow silica colloid 9 can be adjusted according to actual conditions.

In the present invention, the material of the buffer layer 5 is polyborosiloxane, which belongs to the repairable impact-reinforced material (RIRM), and is a non-Newtonian fluid with shear thickening properties, composed of polydimethylsiloxane and boric acid It is obtained by chemical synthesis and has good flexibility and impact resistance.

Ballistic test test result of the present invention is as follows:

EVA and RIRM in the table are both cushioning layer materials and are flexible.

The bulletproof helmet of the present invention is also provided with a limit lanyard for fixing the bulletproof helmet on the wearer's head, or is provided with a clamping part for clamping the bulletproof helmet on the wearer's head at the edge of the bulletproof helmet.

The above descriptions are not intended to limit the present invention. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments. Those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features, and the modifications or replacements made on the basis of not departing from the spirit of the present invention , all belong to the scope of protection of the present invention.

Claims (6)

1. A bulletproof helmet is characterized by comprising an outer shell and an inner shell,

the shell is provided with a bulletproof layer, and the inner shell is provided with a buffer layer;

the cushioning layer comprises a first cushioning group contacting the top of the head of the wearer and a second cushioning group contacting the other parts of the wearer except the top of the head;

the first buffer group and the second buffer group respectively comprise a plurality of buffer gaskets, the plurality of buffer gaskets of the first buffer group are not connected, and two adjacent buffer gaskets of the second buffer group are connected;

the preparation method of the buffer layer comprises the following steps:

a first material preparation step, which comprises mixing treatment of boric acid and polydimethylsiloxane: weighing boric acid and polydimethylsiloxane in a mass ratio of 1:4-1:6, putting the boric acid and the polydimethylsiloxane into a flask, and stirring for 1.5-2.5 h at a temperature of 22.5-26.3 to obtain a first substance;

a step of preparing a second substance, which is to treat the first substance: heating and reacting the first substance at the temperature of 142-207 ℃ for 2-3 h to obtain a second substance;

preparing a buffer layer material, namely treating the second substance: adding the second substance into a reduced pressure distillation device for dehydration for 1.5-2 h to obtain a buffer layer material;

preparing a buffer gasket, namely filling the buffer layer material into the hollow silica gel body to form the buffer gasket; the hollow silicon colloid is of an inwards concave honeycomb structure and comprises a plurality of honeycomb grids, and each honeycomb grid comprises a first edge and a second edge arranged in parallel with the first edge; a third edge and a fourth edge are respectively arranged between the first edge and the second edge; be provided with the orientation on the third edge the bellied first bellying of fourth edge side, be provided with the orientation on the fourth edge the bellied second bellying of third edge side is a plurality of the honeycomb combination is the rectangle, and horizontal adjacent two be provided with the connecting piece between the honeycomb, vertical adjacent two lug connection between the honeycomb fills in the honeycomb with the fluidic buffer layer material under the natural state to the flow restriction of the material of buffer layer is in certain extent.

2. The ballistic resistant helmet according to claim 1,

the plurality of buffer gaskets of the first buffer group comprise a first buffer gasket, and a second buffer gasket, a third buffer gasket, a fourth buffer gasket and a fifth buffer gasket are respectively arranged around the first buffer gasket;

when the two adjacent buffer gaskets in the second buffer group are connected, an annular distribution which horizontally surrounds the head of a wearer is formed.

3. The ballistic resistant helmet according to claim 1,

a first bulge, a second bulge, a third bulge and a fourth bulge are arranged on the surface of the shell far away from the inner shell side;

the first bulge and the second bulge are opposite on the same straight line, and the third bulge and the fourth bulge are opposite horizontally;

the first protrusion is located proximate to the forehead of the wearer and the third protrusion is located proximate to the right ear of the wearer.

4. A ballistic resistant helmet according to claim 1 or 2, characterized in that the process for the preparation of the ballistic layer comprises:

preparing a first material, namely processing the ultra-high molecular weight polyethylene fiber to obtain a first material;

preparing a second material, wherein the step of preparing the second material comprises the step of processing the first material to obtain the second material;

and a trimming step, which comprises trimming the second material to obtain the bulletproof layer.

5. The ballistic resistant helmet according to claim 4,

in the first material preparation step, the ultra-high molecular weight polyethylene fiber is processed, and the method comprises the steps of superposing 31 layers of ultra-high molecular weight polyethylene fiber non-woven cloth with the single-layer thickness of 0.015cm in a bulletproof helmet hot-pressing forming die according to the shape of the bulletproof helmet, and carrying out heat preservation and pressure maintaining processing for 15min to 25min at the temperature of 120 ℃ to 140 ℃ and the pressure of 19MPa to 32 MPa;

in the step of preparing the second material, the first material is processed, and the step of processing the first material comprises the steps of taking the first material out of the hot-press forming die of the bulletproof helmet, putting the first material into a cold-press forming die of the bulletproof helmet, and carrying out pressurization processing for 5min to 10min under the pressure of 23MPa to 28 MPa.

6. The ballistic resistant helmet according to claim 1,

the thickness of the hollow silica gel body is 0.4cm to 0.7cm;

a thickness of the cell proximate between the first boss and the second boss is greater than a thickness of the cell proximate the first edge and the second edge.

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