CN113397263A - Helmet that personnel's protection was dressed - Google Patents

Helmet that personnel's protection was dressed Download PDF

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Publication number
CN113397263A
CN113397263A CN202110547566.6A CN202110547566A CN113397263A CN 113397263 A CN113397263 A CN 113397263A CN 202110547566 A CN202110547566 A CN 202110547566A CN 113397263 A CN113397263 A CN 113397263A
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helmet
shell
helmet shell
preset distance
diameter
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CN202110547566.6A
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CN113397263B (en
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柳占立
杨丰源
庄茁
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Tsinghua University
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Tsinghua University
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    • AHUMAN NECESSITIES
    • A42HEADWEAR
    • A42BHATS; HEAD COVERINGS
    • A42B3/00Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04Parts, details or accessories of helmets
    • A42B3/06Impact-absorbing shells, e.g. of crash helmets
    • A42B3/062Impact-absorbing shells, e.g. of crash helmets with reinforcing means
    • A42B3/063Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures
    • AHUMAN NECESSITIES
    • A42HEADWEAR
    • A42BHATS; HEAD COVERINGS
    • A42B3/00Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04Parts, details or accessories of helmets
    • A42B3/10Linings
    • A42B3/12Cushioning devices

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  • Helmets And Other Head Coverings (AREA)

Abstract

The invention discloses a helmet worn for personnel protection, which relates to the field of mechanics and comprises: a helmet shell system, a dead bolt system; the shell system comprises: an outer helmet shell and an inner helmet shell; the outer helmet shell and the inner helmet shell are fixedly connected through a fixing bolt system; the top of the outer helmet shell is provided with a round hole; the inner helmet shell is positioned at a preset distance right below the hole and is circular, and the diameter of the inner helmet shell is larger than that of the hole; the ratio of the diameter of the inner helmet shell to the diameter of the hole meets a preset condition; the smaller the ratio, the smaller the preset distance. According to the helmet, the explosion shock waves which are continuously reflected and overlapped in the helmet can be transmitted to the interior of the helmet through the gaps formed at the preset distance, the overlapping effect of the explosion shock waves in the helmet is weakened, the safety of the head of a person is guaranteed, the diameter of the inner helmet shell is larger than that of the holes formed in the outer helmet shell, and the fact that penetration objects cannot enter the interior of the helmet from the gaps formed at the preset distance is guaranteed, so that the helmet has high practical value.

Description

Helmet that personnel's protection was dressed
Technical Field
The invention relates to the field of mechanics, in particular to a helmet worn by people in a protection way.
Background
In modern battlefield environments, penetration of bullets or fragments and blast waves from explosions are two major threats to casualties. The new generation of personnel protection equipment needs to give consideration to both the penetration load prevention function and the explosion shock wave prevention function so as to provide comprehensive and effective protection for personnel. The existing traditional helmet is mainly designed for resisting penetration threats, has strong penetration resistance, but has relatively weak performance of protecting explosion shock waves, and even can generate negative effects. Research results show that the explosive shock waves can be continuously reflected and superposed through a gap between the helmet shell of the helmet and the head of a person, so that the pressure of the explosive shock waves applied to the head of the person is increased, and the explosive shock waves can cause great injury to the person.
Penetration loads generated by impact, fragments and the like have the characteristics of small overall impact energy but large concentrated loads, and explosive shock waves generally have the characteristics of large action area, relatively long action time and large overall impact energy. The load characteristics of penetration and explosion shock waves which are different determine the complexity of the design of the helmet with both penetration and explosion shock wave load, which is a challenging research direction.
Disclosure of Invention
In view of the above problems, the present invention provides a helmet for personal protection, which solves the above problems.
An embodiment of the present invention provides a helmet worn for personal protection, the helmet including: a helmet shell system, a dead bolt system;
the shell system comprises: an outer helmet shell and an inner helmet shell;
the outer helmet shell is fixedly connected with the inner helmet shell through the fixing bolt system;
the top of the outer helmet shell is provided with a round hole;
the inner helmet shell is positioned at a preset distance below the hole, the inner helmet shell is circular, and the diameter of the inner helmet shell is larger than that of the hole;
the ratio of the diameter of the inner helmet shell to the diameter of the hole meets a preset condition;
the smaller the ratio, the smaller the preset distance.
Optionally, the preset conditions are:
the ratio is not less than 1.2, and the ratio is not more than 1.5.
Optionally, the helmet further comprises: a cushion block system; the cushion block system comprises: five cushion blocks;
four blocks in the five cushion blocks are identical in size and shape, and the rest blocks are located at the top of the inner wall of the inner helmet shell, are identical in shape to the inner helmet shell, and are smaller than the inner helmet shell in diameter.
Optionally, the four cushion blocks with the same size and shape are respectively located at the lower part of the inner wall of the outer helmet shell and are symmetrically distributed.
Optionally, the thicknesses of the five cushion blocks are adjustable, so that the helmet is fixed on the head of a protected person.
Optionally, the inner shell is circular with a radian;
the distance between each position of the edge of the hole and the inner helmet shell is kept equal.
Optionally, the deadbolt system includes: at least three securing pegs;
the at least three fixing bolts are perpendicular to the outer helmet shell and the inner helmet shell;
the at least three fixing bolts are uniformly distributed on the circumference of the inner helmet shell so as to realize the fixed connection between the outer helmet shell and the inner helmet shell.
Optionally, the helmet is designed to meet penetration-resistant design requirements and explosion-proof shock wave design requirements;
the anti-penetration design requirement is as follows: the preset distance is required to be large enough that penetration objects cannot enter the helmet through a gap formed by the preset distance;
the design requirements of the explosion-proof shock wave are as follows: the explosion shock wave enters the helmet through a gap between the edge of the helmet and the head of the protected person, is reflected and superposed, and is transmitted to the outside of the helmet through the preset distance and the holes.
Optionally, the size of the preset distance is adjusted by the following method:
adjusting the at least three fixing bolts to change the size of the preset distance.
Optionally, when the preset distance is decreased or the ratio is increased, the penetration performance of the helmet is increased;
when the preset distance is increased or the ratio is decreased, the explosion-proof shock wave performance of the helmet is increased.
The helmet worn by personnel in a protective way provided by the invention is divided into two parts: the helmet comprises an outer helmet shell and an inner helmet shell, wherein the outer helmet shell can be taken from the corresponding part of the traditional helmet shell, and the difference is that a round hole is formed right above the top of the outer helmet shell. The inner helmet shell is positioned at a preset distance below the opening hole of the outer helmet shell and is circular, and the inner helmet shell can also be taken from the corresponding part of the traditional helmet shell. The diameter of the hole formed in the outer helmet shell is smaller than that of the circular inner helmet shell, the ratio of the diameter of the inner helmet shell to the diameter of the hole meets a preset condition, and the smaller the ratio is, the smaller the preset distance is.
Through such design, the superimposed explosion shock wave of continuous reflection can be propagated inside the helmet through the gap that predetermines the distance and form in the helmet, the superposition effect of explosion shock wave in the helmet has been weakened, personnel's head's safety has been ensured, and the diameter of interior helmet shell is greater than the diameter that the hole was seted up to the outer helmet shell, inside it can not have penetration thing to get into the helmet from the gap that predetermines the distance and form, the realization can all realize effectual protection to penetration load and explosion shock wave incident in all directions such as front side, rear side, left side, right side. The overlapping effect of the explosive shock waves in the helmet is weakened, and the normal protection performance of the helmet is guaranteed.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic side view of a helmet worn for personal protection in accordance with an embodiment of the invention;
FIG. 2 is a schematic front view of a helmet worn for personal protection in accordance with an embodiment of the present invention;
FIG. 3 is a schematic top view of a helmet worn for personal protection in accordance with an embodiment of the invention;
FIG. 4 is a schematic representation of a helmet penetration resistant design in an embodiment of the present invention;
fig. 5 is a schematic illustration of a helmet blast-resistant shockwave design in an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention, but do not limit the invention to only some, but not all embodiments.
Referring to fig. 1, there is shown a schematic side view of a helmet for personal protection according to an embodiment of the present invention, fig. 2 is a schematic front view of a helmet for personal protection according to an embodiment of the present invention, and fig. 3 is a schematic top view of a helmet for personal protection according to an embodiment of the present invention, the helmet comprising: a helmet shell system, a securing stud, and a system cushion system.
Wherein, the shell system includes: the helmet comprises an outer helmet shell and an inner helmet shell, wherein a cushion block system is fixed in the helmet shell system, when the helmet is worn on the head of a protected person, a cushion block in the cushion block system can fix the helmet on the head of the protected person, and meanwhile, the cushion block also improves the comfort of the wearing person.
Between outer helmet shell and the interior helmet shell in the helmet shell system, through gim peg system fixed connection, can understand because the helmet divide into two parts, for the ease of equipment and change, use the gim peg system to carry out fixed connection, if arbitrary helmet shell needs to be changed in outer helmet shell and the interior helmet shell, only need open the gim peg, change into new can, reduced the use cost of helmet to a certain extent. Certainly, the helmet in the embodiment of the invention can be manufactured by integrally forming based on processes such as 3D printing and the like, and has the advantages that compared with a split structure connected by fixing bolts, the integrally formed structure is firmer, the durability is better, and the disadvantage is higher manufacturing and using cost.
In the embodiment of the invention, the outer helmet shell can be taken from the corresponding part of the traditional helmet shell, and a round hole is arranged right above the top of the outer helmet shell; the inner helmet shell can also be taken from the corresponding part of the traditional helmet shell, the inner helmet shell is positioned under the hole and is preset with a distance, the inner helmet shell is circular and has a radian, the distance between each position of the edge of the hole and the inner helmet shell is kept equal, and the diameter of the inner helmet shell is larger than that of the hole.
The ratio of the diameter of the inner helmet shell to the diameter of the hole meets a preset condition, and the smaller the ratio is, the smaller the preset distance is. Assuming that the diameter of the circular opening of the shell is d1Inner shell diameter d2Then, the ratio of the diameter of the inner helmet shell to the diameter of the hole satisfies the preset condition:
Figure BDA0003074099580000041
in the embodiment of the invention, the inner helmet shell is positioned at the top of the head of a protected person, the inner helmet shell fills a gap formed by the circular holes of the outer helmet shell, and the diameter of the inner helmet shell is larger than that of the holes of the outer helmet shell, so that the whole helmet is protected from dead angles in space.
In an embodiment of the present invention, a cushion block system includes: five cushion blocks; certainly, according to the actual demand, can also set up more cushion, but the weight of whole helmet will probably be aggravated to more quantity of cushion. A preferred choice is therefore five blocks.
Four cushion blocks with the same size and shape are respectively positioned at the lower part of the inner wall of the outer helmet shell and are symmetrically distributed; the rest one block is fixed on the top of the inner wall of the inner helmet shell, has the same shape as the inner helmet shell, and has a diameter smaller than that of the inner helmet shell. The thickness of the above-mentioned five cushion blocks is all adjustable to make the helmet can be according to the head size by the protection personnel, better be fixed in by protection personnel's head, also make simultaneously by the more comfortable helmet of wearing of protection personnel.
In the embodiment of the invention, the helmets of the outer helmet shell and the inner helmet shell are fixedly connected through a fixing bolt system, and the fixing bolt system comprises: at least three securing pegs; the preferred choice is 3 ~ 6 gim pegs, and of course can also set up more gim pegs. However, excessive anchoring studs can affect the protective properties of the inner shell and add weight to the overall helmet.
The at least three fixing bolts are perpendicular to the outer helmet shell and the inner helmet shell and are uniformly distributed on the circumference of the inner helmet shell so as to realize the fixed connection between the outer helmet shell and the inner helmet shell. The at least three fixing bolts are distance-adjustable fixing bolts, the distance-adjustable fixing bolts can enable the preset distance between the outer helmet shell and the inner helmet shell to be adjustable, so that the helmet can adapt to the size of the head of a protected person to a certain extent, and the helmet protection penetration objects can be prevented from invading the interior of the helmet through a gap formed by the preset distance. That is, the predetermined distance must be such that penetration objects cannot enter the helmet through the gap formed by the predetermined distance.
In the embodiment of the invention, the helmet needs to meet the anti-penetration design requirement and the anti-explosion shock wave design requirement in design. Wherein, the anti-penetration design requirement is as follows: the preset distance is required to be large enough that penetration objects cannot enter the helmet through a gap formed by the preset distance; the design requirement of explosion-proof shock waves is as follows: the explosion shock wave enters the helmet through the gap between the edge of the helmet and the head of a protected person, and the reflected and superposed explosion shock wave is generated and is transmitted to the outside of the helmet through the preset distance and the holes.
Referring to fig. 4, a schematic diagram of a helmet penetration-resistant design in an embodiment of the present invention is shown. The helmet is divided into an outer helmet shell and an inner helmet shell, a circular gap formed by holes is formed in the outer helmet shell, and a gap formed by a preset distance between the outer helmet shell and the inner helmet shell is not existed in the traditional helmet, so the helmet protection problem possibly brought by the gap needs to be considered, as shown in fig. 4, the shape similar to a bullet represents any penetration object, the penetration objects moving in two directions can be blocked by the outer helmet shell, the penetration objects moving in directions of (iv) and (v) can be blocked by the inner helmet shell, and if the material of the helmet shell of the helmet is not changed, the penetration performance of the penetration objects moving in the directions cannot be changed. However, for penetration objects moving in three directions, in this case, the penetration objects may penetrate through the gap and enter the helmet to hurt protected personnel, and for this case, the size of the preset distance between the outer helmet shell and the inner helmet shell needs to be adjusted, so that penetration objects moving in three directions cannot enter the helmet through the gap formed by the preset distance between the outer helmet shell and the inner helmet shell, but at the same time, the gap formed by the preset distance between the outer helmet shell and the inner helmet shell needs to meet the requirement of external propagation and release of the superposed explosive shock waves, and therefore, the size of the preset distance between the outer helmet shell and the inner helmet shell is particularly important.
In the embodiment of the invention. The preset distance is controlled by the ratio of the diameter of the inner helmet shell to the diameter of the outer helmet shell with the holes, and the smaller the ratio is, the smaller the preset distance is, and the larger the ratio is, the larger the preset distance is. Namely, the larger the diameter of the inner helmet shell is, the smaller the diameter of the hole formed in the outer helmet shell is, and the larger the preset distance is; the smaller the diameter of the inner helmet shell is, the larger the diameter of the hole formed in the outer helmet shell is, and the larger the preset distance is, but the diameter of the inner helmet shell still needs to be larger than the diameter of the hole formed in the outer helmet shell.
Referring to fig. 5, a schematic diagram of the design of the anti-explosion shock wave of the helmet according to the embodiment of the present invention is shown, and in fig. 5, a cushion block system and a fixing bolt system are omitted, and the design principle is as follows:
the blast shock wave enters the helmet through the gap between the helmet edge and the head of the protected person, the explosion shock wave is transmitted in a gap between the helmet interior and the head of a protected person, and the explosion shock wave is continuously reflected and superposed in the transmission process, so that the pressure of the explosion shock wave is increased, due to the transmission amount convergence effect, the explosion shock waves superposed by reflection converge to the top position of the head of the protected person, the pressure on the top of the head of the person to be protected is high, while the traditional helmet has the defects that the top is closed, this high pressure blast shock wave can cause significant injury to the head of the person being protected, but the helmet of the present embodiment, because the circular gap that the hole formed is seted up to outer helmet shell to and the gap that predetermines distance between outer helmet shell and the inner helmet shell and form exists, the explosion shock wave after assembling spreads to the helmet outside through above-mentioned gap. In addition, because the holes formed in the outer helmet shell are circular, and the inner helmet shell is also circular, the explosive shock waves converged in any direction in the helmet can be transmitted to the outside of the helmet by utilizing the gaps, so that the superposition effect of the explosive shock waves in the helmet is effectively weakened, the superposed explosive shock waves are weakened to be below the pressure threshold of the explosive shock waves born by the head of a protected person, and the safety of the protected person is guaranteed.
The greater the predetermined distance, the better the performance of the release of the external propagation of the superimposed blast shock waves, but at the same time the performance of the helmet against penetration attacks is impaired. If the preset distance is smaller, although the performance of protecting the helmet from the invasion of the invader is improved, the performance of externally transmitting and releasing the superposed explosion shock wave is weakened. Therefore, by combining the above conditions, through a large amount of research, actual measurement and calculation, the following are finally determined: the ratio of the diameter of the inner helmet shell to the diameter of the hole satisfies:
Figure BDA0003074099580000071
is a preferred condition in which the penetration performance of the helmet increases as the preset distance is decreased, or the ratio is increased; when the preset distance is increased or the ratio is decreased, the explosion shock wave preventing performance of the helmet is increased. Can be specifically adjusted according to actual requirements.
In summary, the helmet worn by the personnel protection device according to the embodiment of the present invention is divided into two parts: the helmet comprises an outer helmet shell and an inner helmet shell, wherein the outer helmet shell can be taken from the corresponding part of the traditional helmet shell, and the difference is that a round hole is formed right above the top of the outer helmet shell. The inner helmet shell is positioned at a preset distance below the opening hole of the outer helmet shell and is circular, and the inner helmet shell can also be taken from the corresponding part of the traditional helmet shell. The diameter of the hole formed in the outer helmet shell is smaller than that of the circular inner helmet shell, the ratio of the diameter of the inner helmet shell to the diameter of the hole meets a preset condition, and the smaller the ratio is, the smaller the preset distance is.
Through such design, the superimposed explosion shock wave of continuous reflection can be propagated inside the helmet through the gap that predetermines the distance and form in the helmet, the superposition effect of explosion shock wave in the helmet has been weakened, personnel's head's safety has been ensured, and the diameter of interior helmet shell is greater than the diameter that the hole was seted up to the outer helmet shell, inside it can not have penetration thing to get into the helmet from the gap that predetermines the distance and form, the realization can all realize effectual protection to penetration load and explosion shock wave incident in all directions such as front side, rear side, left side, right side. The helmet provided by the embodiment of the invention can protect penetration objects, simultaneously weakens the superposition effect of the explosive shock waves in the helmet, guarantees the safety of the head of a protected person, and has a high practical value.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or article that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or article.
The embodiments of the present invention have been described in connection with the accompanying drawings, and the principles and embodiments of the present invention are described herein using specific examples, which are provided only to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A helmet to be worn for personal protection, the helmet comprising: a helmet shell system, a dead bolt system;
the shell system comprises: an outer helmet shell and an inner helmet shell;
the outer helmet shell is fixedly connected with the inner helmet shell through the fixing bolt system;
the top of the outer helmet shell is provided with a round hole;
the inner helmet shell is positioned at a preset distance below the hole, the inner helmet shell is circular, and the diameter of the inner helmet shell is larger than that of the hole;
the ratio of the diameter of the inner helmet shell to the diameter of the hole meets a preset condition;
the smaller the ratio, the smaller the preset distance.
2. The helmet according to claim 1, characterized in that said preset conditions are:
the ratio is not less than 1.2, and the ratio is not more than 1.5.
3. The helmet of claim 1, further comprising: a cushion block system; the cushion block system comprises: five cushion blocks;
four blocks in the five cushion blocks are identical in size and shape, and the rest blocks are located at the top of the inner wall of the inner helmet shell, are identical in shape to the inner helmet shell, and are smaller than the inner helmet shell in diameter.
4. The helmet of claim 3, wherein the four pads are symmetrically disposed on a lower portion of the inner wall of the outer shell.
5. The helmet of claim 3, wherein the five blocks are each adjustable in thickness to enable the helmet to be secured to the head of a person to be protected.
6. The helmet of claim 1, wherein the inner shell is circular with an arc;
the distance between each position of the edge of the hole and the inner helmet shell is kept equal.
7. The helmet of claim 1, wherein the deadbolt system comprises: at least three securing pegs;
the at least three fixing bolts are perpendicular to the outer helmet shell and the inner helmet shell;
the at least three fixing bolts are uniformly distributed on the circumference of the inner helmet shell so as to realize the fixed connection between the outer helmet shell and the inner helmet shell.
8. The helmet of claim 1, wherein the helmet is designed to meet penetration and blast protection design requirements;
the anti-penetration design requirement is as follows: the preset distance is required to be large enough that penetration objects cannot enter the helmet through a gap formed by the preset distance;
the design requirements of the explosion-proof shock wave are as follows: the explosion shock wave enters the helmet through a gap between the edge of the helmet and the head of the protected person, is reflected and superposed, and is transmitted to the outside of the helmet through the preset distance and the holes.
9. The helmet according to claim 7, characterized in that the magnitude of the preset distance is adjusted by:
adjusting the at least three fixing bolts to change the size of the preset distance.
10. The helmet of claim 1, wherein penetration performance of the helmet increases when the preset distance is decreased, or the ratio is increased;
when the preset distance is increased or the ratio is decreased, the explosion-proof shock wave performance of the helmet is increased.
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CN208366164U (en) * 2018-03-30 2019-01-11 山东普阳新材料科技有限公司 A kind of multiple protective bulletproof halmet
CN112781460A (en) * 2020-12-25 2021-05-11 清华大学 Device and method for actively controlling and protecting explosion shock waves

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乐秀鸿等: "HYS-1型防冲击头盔的研究", 《振动与冲击》 *

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