阅读说明：本技术 一种减弱爆炸冲击波在头盔内叠加效应的头盔 (Helmet for weakening superposition effect of explosive shock waves in helmet ) 是由 柳占立 杨丰源 栗志杰 庄茁 于 2021-05-19 设计创作，主要内容包括：本发明公开了一种减弱爆炸冲击波在头盔内叠加效应的头盔,涉及力学领域,所述头盔包括：盔壳系统,垫块系统,固定栓系统；其中,所述盔壳系统包括：前盔壳,中盔壳以及后盔壳；垫块系统固定于所述盔壳系统内,用于将所述头盔固定于被防护人员的头部；中盔壳与所述前盔壳、所述后盔壳之间,通过所述固定栓系统固定连接；前盔壳与所述后盔壳的顶部之间留有预设间距的第一间隙；中盔壳位于所述第一间隙下方预设距离处,使得所述中盔壳与所述前盔壳、所述后盔壳在空间上、下位置间形成第二间隙,且所述中盔壳的宽度大于所述预设间距。本发明实施例的头盔,有效减弱了爆炸冲击波在头盔内部的叠加效应,保障了被防护人员头部的安全,具有极高的实用性价值。(The invention discloses a helmet for weakening the superposition effect of explosive shock waves in the helmet, which relates to the field of mechanics, and comprises: the helmet shell system, the cushion block system and the fixing bolt system; wherein the shell system comprises: a front helmet shell, a middle helmet shell and a rear helmet shell; the cushion block system is fixed in the helmet shell system and used for fixing the helmet on the head of a protected person; the middle helmet shell is fixedly connected with the front helmet shell and the rear helmet shell through the fixing bolt system; a first gap with a preset distance is reserved between the top of the front helmet shell and the top of the rear helmet shell; the middle helmet shell is located at a preset distance below the first gap, so that a second gap is formed between the middle helmet shell and the front helmet shell as well as between the middle helmet shell and the rear helmet shell at the upper position and the lower position in space, and the width of the middle helmet shell is larger than the preset distance. The helmet provided by the embodiment of the invention effectively weakens the superposition effect of the explosive shock waves in the helmet, guarantees the safety of the head of a protected person, and has extremely high practical value.)

1. A helmet for attenuating the effects of the superposition of blast shock waves within the helmet, said helmet comprising: the helmet shell system, the cushion block system and the fixing bolt system; wherein the shell system comprises: a front helmet shell, a middle helmet shell and a rear helmet shell;

the cushion block system is fixed in the helmet shell system and used for fixing the helmet on the head of a protected person;

the middle helmet shell is fixedly connected with the front helmet shell and the rear helmet shell through the fixing bolt system;

a first gap with a preset distance is reserved between the top of the front helmet shell and the top of the rear helmet shell;

the middle helmet shell is located at a preset distance below the first gap, so that a second gap is formed between the middle helmet shell and the front helmet shell as well as between the middle helmet shell and the rear helmet shell at the upper position and the lower position in space, and the width of the middle helmet shell is larger than the preset distance.

2. The helmet of claim 1, wherein the middle shell is a wide-bar cuboid with an adjustable width and an arc;

the middle helmet shell is positioned on the top of the head of the protected person.

3. The helmet of claim 1, wherein the front shell and the rear shell are symmetrically disposed forward and rearward, respectively in front of and behind a head of a person to be protected.

4. The helmet of claim 1, wherein the pad system comprises: five cushion blocks;

four of the five cushion blocks are identical in size and shape, the rest cushion blocks are fixed to the top of the inner wall of the middle helmet shell and identical in shape with the middle helmet shell, and the width and the length of the rest cushion blocks are smaller than those of the middle helmet shell.

5. The helmet of claim 4, wherein the four pads of the same size and shape are attached to the lower portions of the inner walls of the front and rear shells, respectively.

6. The helmet of claim 4, 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.

7. The helmet of claim 2, wherein the deadbolt system comprises: six fixing bolts;

three fixing bolts in the six fixing bolts are respectively arranged at the two sides and the top of the front helmet shell and the middle helmet shell to be fixedly connected;

the other three fixing bolts in the six fixing bolts are respectively arranged on two sides and the top of the rear helmet shell and the middle helmet shell to be fixedly connected;

the six fixing bolts are fixing bolts with adjustable distances, so that the distance between the front helmet shell and the middle helmet shell and the distance between the rear helmet shell and the middle helmet shell are adjustable.

8. The helmet of claim 7, wherein the size of the second gap is adjusted by:

adjusting the width of the middle helmet shell;

when the width of the middle helmet shell is increased, the second gap is decreased;

when the width of the middle helmet shell is smaller, the second gap is larger;

alternatively, the first and second electrodes may be,

adjusting the six fixing bolts to enable the distance between the front helmet shell and the middle helmet shell and the distance between the rear helmet shell and the middle helmet shell to be changed;

when the distance between the front helmet shell and the middle helmet shell and the distance between the rear helmet shell and the middle helmet shell become smaller, the second gap becomes smaller;

when the distance between the front shell and the middle shell and the distance between the rear shell and the middle shell become larger, the second gap becomes larger.

9. The helmet according to claim 1, wherein the size of the second gap meets a preset condition, the preset condition being that the size of the second gap meets a condition that explosives cannot enter the interior of the helmet through the second gap;

increasing the first gap and the second gap to improve the helmet's ability to attenuate the additive effect of the blast shock wave within the helmet.

The first clearance with the second clearance, when being protected personnel normally wear the helmet, increase by the protection personnel's head top and external air circulation, improve by protection personnel's the travelling comfort of wearing.

10. The helmet according to any one of claims 1 to 9, wherein the principle by which the helmet attenuates the effect of the detonation shock waves superimposed within the helmet when the helmet is worn on the head is:

the explosion shock waves enter the helmet through a gap between the helmet edge and the head, are reflected and superposed in the gap between the helmet and the head, the explosion shock waves subjected to reflection and superposition are converged towards the top of the head of the protected person, and part of the converged explosion shock waves are transmitted to the outside of the helmet through the second gap and the first gap so as to weaken the superposition effect of the explosion shock waves in the helmet.

Technical Field

The invention relates to the field of mechanics, in particular to a helmet for weakening the superposition effect of explosive shock waves in the helmet.

Background

When an explosive in the air explodes, strong shock waves can be generated, damage can be caused to surrounding objects, and great threat can be caused to the life safety of personnel, so that the protection on the explosion shock waves is particularly important. Typical equipment in the form of helmet-type personal protection provides effective protection for the head of a person. However, current helmets are designed primarily for improved ballistic performance, and are relatively weak against blast shock waves.

For a person wearing a helmet, the blast shock waves can enter the interior of the shell of the helmet through the gap between the shell of the helmet and the head of the person. The explosion shock waves are continuously reflected and superposed in the limited space between the helmet shell and the head of a person, so that the pressure of the explosion shock waves acting on the head of the person is increased, and the explosion shock waves can cause great harm to the person. Experimental studies have shown that for an explosive shock wave incident from the front of the head, the pressure amplitude at the rear region of the head increases significantly when the helmet is worn, which is due to the superposition effect of the explosive shock wave. These results show that, after wearing a conventional helmet, the amplitude of the shock wave pressure applied to a part of the surface of the person's head under certain conditions increases, and the effect of the superposition of the explosive shock waves in the helmet is significantly reduced in its protection against the explosive shock waves.

Disclosure of Invention

In view of the above problems, the present invention provides a helmet for reducing the effect of the explosive shock waves superimposed in the helmet, and solves the above problems.

The embodiment of the invention provides a helmet for weakening the superposition effect of explosive shock waves in the helmet, which comprises: the helmet shell system, the cushion block system and the fixing bolt system; wherein the shell system comprises: a front helmet shell, a middle helmet shell and a rear helmet shell;

the cushion block system is fixed in the helmet shell system and used for fixing the helmet on the head of a protected person;

the middle helmet shell is fixedly connected with the front helmet shell and the rear helmet shell through the fixing bolt system;

a first gap with a preset distance is reserved between the top of the front helmet shell and the top of the rear helmet shell;

the middle helmet shell is located at a preset distance below the first gap, so that a second gap is formed between the middle helmet shell and the front helmet shell as well as between the middle helmet shell and the rear helmet shell at the upper position and the lower position in space, and the width of the middle helmet shell is larger than the preset distance.

Optionally, the middle helmet shell is a wide-strip cuboid with radian and adjustable width;

the middle helmet shell is positioned at the top of the head of the protected person;

optionally, the front helmet shell and the rear helmet shell are symmetrically distributed in front and at the back, and are respectively located at the front part and the back part of the head of the protected person.

Optionally, the cushion block system includes: five cushion blocks;

four of the five cushion blocks are identical in size and shape, the rest cushion blocks are fixed to the top of the inner wall of the middle helmet shell and identical in shape with the middle helmet shell, and the width and the length of the rest cushion blocks are smaller than those of the middle helmet shell.

Optionally, the four cushion blocks with the same size and shape are respectively fixed at the lower parts of the inner walls of the front helmet shell and the rear helmet shell.

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 deadbolt system includes: six fixing bolts;

three fixing bolts in the six fixing bolts are respectively arranged at the two sides and the top of the front helmet shell and the middle helmet shell to be fixedly connected;

the other three fixing bolts in the six fixing bolts are respectively arranged on two sides and the top of the rear helmet shell and the middle helmet shell to be fixedly connected;

the six fixing bolts are fixing bolts with adjustable distances, so that the distance between the front helmet shell and the middle helmet shell and the distance between the rear helmet shell and the middle helmet shell are adjustable.

Optionally, the size of the second gap is adjusted by:

adjusting the width of the middle helmet shell;

when the width of the middle helmet shell is increased, the second gap is decreased;

when the width of the middle helmet shell is smaller, the second gap is larger;

alternatively, the first and second electrodes may be,

adjusting the six fixing bolts to enable the distance between the front helmet shell and the middle helmet shell and the distance between the rear helmet shell and the middle helmet shell to be changed;

when the distance between the front helmet shell and the middle helmet shell and the distance between the rear helmet shell and the middle helmet shell become smaller, the second gap becomes smaller;

when the distance between the front shell and the middle shell and the distance between the rear shell and the middle shell become larger, the second gap becomes larger.

Optionally, the size of the second gap meets a preset condition, where the preset condition is that the size of the second gap meets a condition that an explosive cannot enter the helmet through the second gap;

increasing the first gap and the second gap to improve the helmet's ability to attenuate the additive effect of the blast shock wave within the helmet.

The first clearance with the second clearance, when being protected personnel normally wear the helmet, increase by the protection personnel's head top and external air circulation, improve by protection personnel's the travelling comfort of wearing.

Optionally, when the helmet is worn on the head, the principle that the helmet attenuates the superposition effect of the blast shock wave in the helmet is as follows:

the explosion shock waves enter the helmet through a gap between the helmet edge and the head, are reflected and superposed in the gap between the helmet and the head, the explosion shock waves subjected to reflection and superposition are converged towards the top of the head of the protected person, and part of the converged explosion shock waves are transmitted to the outside of the helmet through the second gap and the first gap so as to weaken the superposition effect of the explosion shock waves in the helmet.

The helmet for weakening the superposition effect of the explosive shock waves in the helmet, provided by the invention, divides the helmet for protecting the explosive shock waves into three parts: the helmet comprises a front helmet shell, a middle helmet shell and a rear helmet shell, wherein a first gap with a preset interval is reserved between the top of the front helmet shell and the top of the rear helmet shell; well helmet shell is located this first clearance below and predetermines distance department for well helmet shell and preceding helmet shell, back helmet shell are in the space, down between the position form the second clearance, like this, constantly reflect superimposed explosion shock wave and partially propagate out of the helmet inside through this second clearance and first clearance, the stack effect of explosion shock wave in the helmet has been weakened, personnel's head's safety has been ensured, and the width of well helmet shell is greater than and predetermines the interval, prevented that the explosive from predetermineeing the second clearance of interval and the first clearance department entering the inside possibility of helmet, have high practical value.

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 for attenuating the effects of detonation shock waves superimposed within the helmet in accordance with an embodiment of the present invention;

FIG. 2 is a schematic front view of a helmet for attenuating the effects of detonation shock waves superimposed within the helmet, in accordance with an embodiment of the present invention;

FIG. 3 is a schematic top view of a helmet for attenuating the effects of detonation shock waves superimposed within the helmet in accordance with an embodiment of the invention;

FIG. 4 is a schematic illustration of a helmet of an embodiment of the present invention to protect against bullet attacks;

figure 5 is a schematic illustration of the effect of a helmet in accordance with an embodiment of the present invention on the attenuation of the effects of a blast shock wave superimposed within the helmet.

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 reducing the effect of the superposition of blast shock waves in the helmet according to an embodiment of the present invention, fig. 2 is a schematic front view of a helmet for reducing the effect of the superposition of blast shock waves in the helmet according to an embodiment of the present invention, and fig. 3 is a schematic top view of a helmet for reducing the effect of the superposition of blast shock waves in the helmet according to an embodiment of the present invention, the helmet comprising: the helmet shell system, the cushion block system and the fixing bolt system; wherein, the shell system includes: preceding helmet shell, well helmet shell and back helmet shell, the cushion system is fixed in the helmet shell system, wears when being protected personnel head when this helmet, and the cushion in the cushion system can be fixed in the helmet by protection personnel's head, and the cushion has also promoted the personnel's of wearing comfort simultaneously.

The middle helmet shell in the helmet shell system is fixedly connected with the front helmet shell and the rear helmet shell through the fixing bolt system, and it can be understood that the helmet is divided into three parts, so that the assembly and the replacement are convenient, the fixing bolt system is used for fixedly connecting, if any helmet shell in the middle helmet shell, the front helmet shell and the rear helmet shell needs to be replaced, only the fixing bolt needs to be opened, and the helmet shell is replaced by a new one, and the use cost of the helmet is reduced 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, a first gap with a preset distance is reserved between the tops of the front helmet shell and the rear helmet shell; the middle helmet shell is located at a preset distance below the first gap, so that a second gap is formed between the middle helmet shell and the upper and lower positions of the space between the middle helmet shell and the front helmet shell as well as between the middle helmet shell and the rear helmet shell, and the width of the middle helmet shell is larger than the preset distance between the tops of the front helmet shell and the rear helmet shell. The first distance and the second distance are optimal values obtained after a large number of simulation and field tests, and the helmet which can protect the heads of most of protected personnel is finally designed by combining a plurality of factors such as the size difference of the heads of the protected personnel, the performance of helmet protection, reliability, operation resistance and the like.

In the embodiment of the invention, the middle helmet shell is a wide strip type cuboid with radian and adjustable width; the middle helmet shell is positioned at the top of the head of a protected person, and can be understood as the first gap between the front helmet shell and the rear helmet shell is filled up by the middle helmet shell, and the whole helmet protection is ensured to have no dead angle in space because the width of the middle helmet shell is larger than the preset distance. The front helmet shell and the rear helmet shell are symmetrically distributed in the front and back direction and are respectively positioned at the front part and the rear part of the head of a protected person, so that the traditional helmet is divided into a front part and a rear part by cutting along the positions from the Baihui cave to the left ear and the right ear, and then the front helmet shell and the rear helmet shell are respectively cut along the cutting positions by a certain width, so that the front helmet shell and the rear helmet shell in the embodiment of the invention are formed.

Divide into the helmet of preceding helmet shell, well helmet shell, back helmet shell triplex and need come fixed connection through the gim peg system, the gim peg system includes: six fixing bolts; three fixing bolts in the six fixing bolts are respectively arranged at the two sides and the top of the front helmet shell and the middle helmet shell to fixedly connect the front helmet shell and the middle helmet shell, and it can be understood that the front helmet shell and the middle helmet shell are fixedly connected together by using the three fixing bolts at the top position and the two ear positions of a protected person. The other three fixing bolts in the six fixing bolts are respectively fixedly connected with the two sides of the rear helmet shell and the middle helmet shell and the top position, and the fixed connection position corresponds to the connection position of the front helmet shell and the middle helmet shell. Above-mentioned six gim pegs are the gim peg of adjustable distance, and the gim peg of adjustable distance can be so that the distance between preceding helmet shell and the well helmet shell to and the distance between back helmet shell and the well helmet shell is all adjustable, can make the helmet adaptation by protective personnel's head size to a certain extent like this, also help the helmet to prevent that explosive object from invading inside the helmet through the second clearance.

In an embodiment of the present invention, a cushion block system includes: five cushion blocks; four cushion blocks with the same size and shape in the five cushion blocks are respectively fixed at the lower parts of the inner walls of the front helmet shell and the rear helmet shell; the rest cushion block is fixed on the top of the inner wall of the middle helmet shell, the shape of the cushion block is the same as that of the middle helmet shell, and the width and the length of the cushion block are smaller than those of the middle 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 an embodiment of the present invention, the size of the second gap meets a preset condition, where the preset condition is that the size of the second gap meets a condition that an explosive cannot enter the interior of the helmet through the second gap. In addition, under the condition of compound preset condition, increase first clearance and second clearance can weaken the performance of the stack effect of explosion shock wave in the helmet in order to improve the helmet, the existence in first clearance and second clearance simultaneously for when being normally worn the helmet by the protection personnel, increase by protection personnel's head top and external circulation of air, improved to a certain extent by protection personnel's the travelling comfort of wearing.

Referring to fig. 4, a schematic illustration of a helmet of an embodiment of the present invention to protect against bullet attacks is shown. Since the helmet is divided into three parts, and the second gap formed between the middle helmet shell and the front and rear helmet shells at the upper and lower positions is not existed in the conventional helmet, the helmet protection problem possibly caused by the second gap needs to be considered, as shown in fig. 4, if the bullet represents any explosive, for the bullets moving in all directions, if the material of the helmet shell of the helmet is not changed, the bullet invasion resistance of the helmet will not be changed. However, for the bullet moving in the direction of (i), in this case, the bullet may pass through the second gap and enter the helmet, causing injury to protected personnel, and in view of this situation, the size of the second gap needs to be adjusted, so that the bullet moving in the direction of (i) cannot enter the helmet through the second gap, but at the same time, the second gap needs to meet the requirement of external propagation and release of the superimposed explosive shock wave, and therefore, the size of the second gap is particularly important, and the size is finally obtained through strict simulation, calculation and field test.

In the embodiment of the invention, the size of the second gap is adjusted by the following method:

1) adjusting the width of the middle helmet shell; when the width of the middle helmet shell is increased, the second gap is naturally reduced; when the width of the middle helmet shell becomes smaller, the second gap naturally becomes larger.

2) Adjusting the six fixing bolts to change the distance between the front helmet shell and the middle helmet shell and the distance between the rear helmet shell and the middle helmet shell; when the distance between the front helmet shell and the middle helmet shell and the distance between the rear helmet shell and the middle helmet shell become smaller, the second gap naturally becomes smaller; when the distance between the front helmet shell and the middle helmet shell and the distance between the rear helmet shell and the middle helmet shell become larger, the second gap naturally becomes larger.

Finally, the principle of the helmet for weakening the superposition effect of the explosive shock waves in the helmet when the helmet is worn on the head of the person to be protected is analyzed, referring to fig. 5, a schematic diagram of the principle of the helmet for weakening the superposition effect of the explosive shock waves in the helmet in the embodiment of the present invention is shown, in fig. 5, a cushion block system and a fixing bolt system are omitted, and the principle is as follows:

the explosion shock wave enters the helmet through the gap between the edge of the helmet and the head of the protected person and is transmitted in the gap between the helmet and the head of the protected person, the explosion shock wave is continuously reflected and superposed in the transmission process, so that the pressure of the explosion shock wave is increased, the explosion shock wave superposed through reflection is converged towards the top position of the head of the protected person due to the transmission amount convergence effect, so that the top pressure of the head of the protected person is high, and the traditional helmet has the top closed type, so that the explosion shock wave with high pressure can cause great damage to the head of the protected person, but in the helmet in the embodiment of the invention, due to the existence of the second gap and the first gap, part of the collected explosion shock wave can be transmitted to the outside of the helmet through the second gap and the first gap, so that the superposition effect of the explosion shock wave in the helmet is weakened, the explosion shock wave after being superposed is ensured to be weakened to be below the pressure threshold of the explosion shock wave which can be borne by the head of the protected person, thereby ensuring the safety of the protected person.

In summary, the helmet for weakening the superposition effect of the explosive shock waves in the helmet according to the embodiment of the present invention divides the helmet for protecting the explosive shock waves into three parts: the helmet comprises a front helmet shell, a middle helmet shell and a rear helmet shell, wherein a first gap with a preset interval is reserved between the top of the front helmet shell and the top of the rear helmet shell; the middle helmet shell is located at the preset distance below the first gap, so that the middle helmet shell, the front helmet shell and the rear helmet shell form a second gap in the upper position and the lower position of the space, the overlapped explosion shock waves are continuously reflected and partially transmitted out of the interior of the helmet through the second gap and the first gap, the overlapping effect of the explosion shock waves in the helmet is weakened, the safety of the head of a person is guaranteed, the width of the middle helmet shell is larger than the preset distance, and the possibility that explosives enter the interior of the helmet from the second gap and the first gap of the preset distance is prevented.

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.