KR100989524B1 - Protective helmet - Google Patents

Abstract

PURPOSE: A protection helmet is provided, which can prevent excessive rotation of a lens and keep the opened state of a part the facial area by the lens. CONSTITUTION: A protection helmet comprises: a shell(10) which is formed into the hemi-spherical shape and protects the head from the external impact; a liner ring(20) which is installed in the inner side of shell and isolates the head from the shell; a lens(30) in which both end parts are pivotally fixed inside the shell; and an adjuster fastener(40) which is fixed to the inside of the shell in order to make rotation angle adjustment of the lens possible.

Description

Protective Helmet {PROTECTIVE HELMET}

The present invention relates to a helmet, and more particularly to a protective helmet that can protect the front and both sides and the rear from the heat or foreign matter of the work site while protecting the head from external impact.

Generally, a protective helmet is used to promote safety at a fire site or a construction site. There are many dangerous structures scattered on fire and construction sites, and there is always a risk of safety accidents caused by falling structures during work, so that a protective helmet is used to protect the body, especially the head, of workers exposed to such sites. It has been worn essentially.

The protective helmet is manufactured to have a relatively light weight in order not to cause inconvenience to the work while the worker is wearing it, and is also manufactured with excellent strength to protect the head of the worker from external impact.

A protective helmet is formed in a hemispherical shape to protect the head, a helmet inner shell to be installed on the inside of the helmet outer shell to cushion the impact and a fixed strap for fixing the helmet outer shell to the operator's head do. In addition, in recent years, a separate lens is installed to protect the face of the operator. Such a lens is a transparent plate made of high strength, such as polycarbonate, and is used to close the face part during work to protect it from foreign substances and heat, and to open it normally.

However, the conventional protective helmet as described above has a problem in that the face part can be completely opened or completely closed by the above-described lens and only a part of the face can be opened and closed, which causes inconvenience to the operator. In addition, the lens as described above is located in the front of the outer shell of the helmet when the face portion is open, there is a disadvantage that it is easily contaminated by foreign matter or damage caused by external impact.

On the other hand, a conventional helmet is integrally coupled to the upper portion of the helmet endothelial is seated on the head of the worker. Since these meshes are made of fabric and are in direct contact with the operator's head, they must be washed off frequently from the helmet. However, the conventional helmet is fixed so that the mesh is not separated from the helmet endothelial has a hassle to separate the helmet endothelial to wash the mesh. That is, there is a problem in that the separation of the mesh is impossible only in the state where the helmet endothelial is coupled to the helmet outer shell.

On the other hand, since a conventional helmet protects only the head of the worker, the ear, the back of the head, and the neck are exposed to the outside, and thus there is a disadvantage in that the worker cannot be protected from heat or foreign matter on the side and rear of the worker.

The present invention was created to solve the above problems of the prior art, it is possible to adjust the angle of the lens to protect the face portion can maintain a partial closed state of the face portion by the lens, preventing excessive rotation of the lens The purpose is to provide a protective helmet that can be.

It is also an object of the present invention to provide a protective helmet in which the lens can be stored inside the helmet when the lens is opened.

Another object of the present invention is to provide a protective helmet that can be easily removed separately only the mesh coupled to the helmet endothelial without removing the helmet endothelial of the helmet.

In addition, an object of the present invention is to provide a protective helmet in which a separate shock absorbing member is provided on the inner side of the helmet.

In addition, it is an object to provide a protective helmet that can protect not only the head but also the ears, the back of the head and the back of the neck.

One aspect of the present invention for achieving the above object, the shell is formed in a hemispherical shape, to protect the head from external impact; A liner ring installed inside the shell to separate the head from the shell; A lens having both ends rotatably fixed inside the shell; And an adjuster fastener configured to fix the rotation angle of the lens to the inside of the shell, wherein the adjuster fastener includes: a boss provided at both sides of the shell; An uneven ring inserted into the boss and provided with unevenness on an inner circumferential surface thereof; A hinge protruding from both ends of the lens and inserted and rotated by the concave-convex ring, and having a protrusion engaged with the concave-convex and rotating while being stepped along the concave-convex; And a fastening member configured to fasten the hinge to the boss, wherein the stopper controls a rotation angle of the hinge, wherein the stopper is provided on the lens and the outer circumference of the concave-convex ring together with the hinge. Rotating projection to rotate along; It relates to a protective helmet comprising a; protruding to the outer circumference of the concave-convex ring and the engaging jaw caught by the rotating projection.

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In addition, the present invention further includes elastic means for providing elasticity to the unevenness to induce smooth rotation of the protrusions provided in the hinge, wherein the elastic means is formed between the boss and the uneven ring, It includes; an elastic space to provide a flow space in the concavities and convexities engaging the protrusions of the hinge to elastically deform the irregularities.

The shell further includes a neck guide extending from both sides and rear to protect the ear and the head of the head.

The present invention further includes an inner shell provided inside the shell to absorb an impact applied to the shell, wherein the inner shell comprises: a hard foam attached to an upper portion of the shell to mitigate an impact applied to the shell; And a soft foam stacked on a lower portion of the hard foam, having a plurality of cutouts in a radial direction, and cushioning a shock transmitted to the hard foam.

In addition, the present invention is coupled to the liner ring and the mesh shielding the upper portion of the liner ring to be breathable; And a fastener for attaching and detaching the mesh to the liner ring.

The fastener may include, for example, a plurality of fitting protrusions protruding at one end of the liner ring; A fitting piece embedded in one end of the mesh and integrally provided with a plurality of fitting holes coupled to the fitting protrusion; A plurality of binding holes formed at the other end of the liner ring; And a Velcro fastener formed at the other end of the mesh and penetrating the binding hole to bind the mesh to the liner ring.

In addition, the present invention is provided with a plurality of coupling pieces are provided around the rear of the liner ring, the lower portion of the liner ring; And a neck hood coupled to the coupling piece and shielding the rear of the shell to protect the neck from heat or foreign matter.

As described above, the protective helmet according to the present invention can adjust the rotation angle of the lens by the adjuster fastener, so that the face part can be partially opened and closed as necessary, and the lens opening and closing the face part is prevented from excessive rotation by the stopper. The lens is smoothly rotated by the elastic means.

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In addition, by the neck guide extending to the shell can be protected from the side and rear hazards, the impact on the shell is cushioned by the inner shell can further protect the operator's head.

In addition, since only the mesh can be separated from the helmet by the fastener, only the mesh can be easily removed at the time of washing or replacing the mesh and reattached after washing.

In addition, the fastening position of the mesh can be adjusted to the head by the Velcro fastener.

In addition, the ear, the back of the head and the neck are protected by the neck hood to protect the side and rear of the operator from heat or foreign matter, and the neck piece can be easily attached and detached to the liner ring because the joint piece is formed under the liner ring. have.

1 is an exploded perspective view showing a protective helmet according to an embodiment of the present invention.
2 is an exploded perspective view showing an adjuster fastener of a protective helmet according to an embodiment of the present invention.
Figure 3 is an enlarged longitudinal sectional view showing an adjuster fastener of a protective helmet according to an embodiment of the present invention.
Figure 4 is a perspective view showing a liner ring of a protective helmet according to an embodiment of the present invention.
5 is a longitudinal sectional view showing a protective helmet according to an embodiment of the present invention.
Figure 6 is a side view showing a protective helmet according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known general functions or configurations will be omitted.

1 is an exploded perspective view showing a protective helmet according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing an adjuster fastener of the protective helmet according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention An enlarged longitudinal sectional view showing an adjuster fastener of a protective helmet. In addition, Figure 4 is a perspective view showing a liner ring of a protective helmet according to an embodiment of the present invention, Figure 5 is a longitudinal sectional view showing a protective helmet according to an embodiment of the present invention, Figure 6 is according to an embodiment of the present invention One side view showing protective helmet.

Referring to FIG. 1, the protective helmet 100 of the present invention includes a shell 10, a liner ring 20, a lens 30, and an adjuster fastener 40.

The shell 10 is covered by the head to protect the head from external shocks. The shell 10 is formed of a material having high strength and is formed of a plastic-based material having high heat resistance and flame resistance. The shell 10 is formed in a hemispherical shape as shown, the rib 11 is provided on the surface to reinforce the rigidity.

On the other hand, the shell 10 is provided with a neck guide 13 of the sunshade to protect the ear and the head of the head. The neck guide 13 is formed by extending both sides and the rear of the shell 10 to the bottom. That is, the neck guide 13 covers the ears and the back of the head to protect the ears and the back of the head from foreign substances or heat from both sides and the back.

In addition, an inner shell 15 is provided inside the shell 10. The inner shell 15 absorbs and cushions the impact applied to the shell 10.

The inner shell 15 may be configured to include a hard foam 15a and a soft foam 15b. The hard foam 15a is attached to the top of the shell 10 to primarily mitigate the impact transmitted from the shell 10. Hard foam (15a) is made of a foamed resin that is maintained in shape, is made to fit the shape of the shell 10 is fixed to the inside of the shell 10 by interference fit or attachment.

The soft foam 15b is stacked below the hard foam 15a to secondly cushion the shock that is primarily mitigated by the hard foam 15a. Here, the soft foam 15b is made of a softer and flexible foamed resin than the hard foam 15a for a feeling of wearing, and is laminated on the lower portion of the hard foam 15a by interference fit or adhesion.

Since the soft foam 15b is soft, hemispherical molding is difficult. Therefore, the soft foam 15b can be configured by cutting the plate-shaped foam material in a circular shape without forming it into a hemispherical shape.

The soft foam 15b has a cutout 15c formed radially as shown. The cutout 15c is an element that enables the softform 15b to be formed in a hemispherical shape. That is, the soft foam 15b may not be formed in a hemispherical shape without the cutout 15c.

The shell 10 is provided with a liner ring 20 inside. The liner ring 20 is fixed to the inner side of the shell 10 to fit the head, and spaces the head from the shell 10. The liner ring 20 includes an outer liner 21 fixed to the shell 10 and an inner liner 25 into which a head is inserted.

The outer liner 21 is formed in a circular band shape and is fastened to the inner circumference of the shell 10 by a fastening member such as a fixing bolt.

The inner liner 25 is provided inside the outer liner 21, and is connected to the outer liner 21 through a connector 26. The inner liner 25 has a fiber cushion band (not shown) coupled to the inner circumferential surface, and is provided with a control mechanism 27 for adjusting the size of the inner diameter at one end.

The mesh 50 is coupled to the upper portion of the outer liner 21. The mesh 50 is formed of a breathable mesh and shields the upper portion of the outer liner 21 to support the upper portion of the head inserted into the inner liner 25. The coupling structure of the mesh 50 is mentioned later.

On the other hand, the outer liner 21 is provided with a plurality of coupling pieces (63) to which the neck hood 60 to be described later is coupled.

The lens 30 is formed of a transparent material having high strength, and is rotatably coupled to the inside of the shell 10 by the adjuster fastener 40 to protect the face while opening and closing the front of the shell 10. In addition, the lens 30 opens and closes the front of the shell 10 while rotating stepwise by the adjuster fastener 40. Here, the lens 30 is provided with a handle 33 that is gripped by hand for rotation.

Referring to FIG. 2, the adjuster fastener 40 may include a boss 41, an uneven ring 43, a hinge 45, and a fastening member 47.

The boss 41 is provided in a groove shape on both inner sides of the shell 10. The boss 41 may be formed in the same manner as the shell 10, or may be formed as a separate member and coupled to the shell 10. The boss 41 has a stepped 41a on one side. The stepped portion 41a prevents rotation of the uneven ring 43 inserted into the boss 41.

The uneven ring 43 is inserted into the boss 41, and is provided with a locking jaw 48b to be fitted to the step 41a described above. Therefore, the uneven ring 43 does not rotate by the step 41a of the boss 41.

In addition, the concave-convex ring 43 is formed with a plurality of concave-convex 43a on the inner circumferential surface. The unevenness 43a is formed at both sides of the uneven ring 43 as shown and may be formed only at one side.

The hinge 45 protrudes from both ends of the lens 30 and is inserted into the concave-convex ring 43 fixed to the boss 41 to rotate. Here, the protrusion 45a which is mated with the unevenness 43a of the uneven ring 43 is provided outside the hinge 45.

The fastening member 47 penetrates both ends of the lens 30 in which the hinge 45 is formed and is fastened to the inside of the shell 10 in which the boss 41 is formed. That is, the lens 30 is connected to the shell 10 by the fastening member 47.

Referring to FIG. 3, the projection 45a of the hinge 45 engaged with the unevenness 43a rotates while being caught along the unevenness 43a. That is, the unevenness 43a rotates the lens 30 rotating about the boss 41 in stages. Therefore, the lens 30 is rotated in stages by the projections 45a formed on the hinge 45 and the unevenness 43a of the uneven ring 43.

Meanwhile, the adjuster fastener 40 may further include a stopper 48.

The stopper 48 is a member for controlling the rotation angle of the hinge 45 to rotate the hinge 45 only within a set section. Here, the setting section is a section in which the lens 30, which rotates together with the hinge 45, opens and closes the front of the shell 10, and a section in which the rotating protrusion 48a to be described later rotates. Accordingly, the stopper 48 prevents the lens 30 from being inserted into the shell 10 or excessively descending down the front side of the shell 10.

Here, the stopper 48 may be configured to include a rotary protrusion 48a and the above-described locking step 48b.

The rotary protrusion 48a is provided on the lens 30 and rotates along the outer circumference of the concave-convex ring 43 together with the hinge 45. That is, the rotary protrusion 48a is inserted into the uneven ring 43 and protrudes outside the hinge 45 to rotate.

The locking jaw 48b protrudes on the outer circumference of the uneven ring 43 and prevents rotation of the rotating protrusion 48a that rotates along the outer circumference of the uneven ring 43. In addition, the locking jaw 48b is fitted to the step 41a of the boss 41 to prevent rotation of the uneven ring 43 as described above. Therefore, the locking jaw 48b controls the rotation of the hinge 45 and at the same time fixes the uneven ring 43.

The locking jaw 48b is provided in a pair as shown, and the rotation projection 48a rotates between the pair of locking jaws 48b.

The rotary protrusion 48a rotates only between the sections of the pair of locking projections 48b, that is, within the above-described setting section. Therefore, the lens 30 rotates only the set section by the rotation protrusion 48a and the locking step 48b.

In addition, the adjuster fastener 40 may be configured to further include an elastic means.

The elastic means provides elasticity to the unevenness 43a to induce smooth rotation of the protrusion 45a provided on the hinge 45. The elastic means is composed of an elastic space 49 provided between the above-described boss 41 and the uneven ring 43.

The elastic space 49 is formed outside the unevenness 43a to provide a flow space for the unevenness 43a to elastically deform. That is, the unevenness 43a is elastically deformed by the elastic space 49 when the protrusion 45a of the hinge 45 is rotated.

Therefore, the lens 30 rotates smoothly by the elastic space 49 while gradually rotating by the unevenness 43a.

Referring to FIG. 4, the mesh 50 is coupled to the outer liner 21 to shield the upper portion of the outer liner 21 through ventilation. The mesh 50 is formed of a fiber or leather material and is coupled to the outer liner 21 by fasteners 55.

The fastener 55 may include a fitting protrusion 56 provided at the outer liner 21, a binding hole 58, and a fitting piece 57 and a Velcro fastener 59 provided at the mesh 50. have.

The fitting protrusion 56 protrudes at one end of the outer liner 21, preferably a plurality of protrusions at the front outer side of the outer liner 21. The fitting protrusion 56 is provided with a separation prevention projection 56a for preventing the separation of the fitting piece 57 to be described later on both sides of the end as in the enlarged view.

Fitting piece 57 is formed of a flexible material having a length corresponding to the width of the mesh 50 is embedded in one end of the mesh (50). The fitting piece 57 is provided with a plurality of fitting portions 57a fitted to the fitting protrusion 56. The fitting portion 57a protrudes outward from the fitting piece 57 embedded in the mesh 50.

The fitting portion 57a may be configured to include a fitting hole 57b and a fitting jaw 57c. The fitting portion 57a is fitted to the fitting protrusion 56 by the fitting hole 57b, and the lower portion is formed as a long hole as shown in the enlarged view "a".

The fitting jaw 57c protrudes from the lower portion of the fitting hole 57b to be interposed between the release preventing jaw 56a of the fitting protrusion 56 and the outer liner 21. That is, the fitting portion 57a is fitted to the fitting protrusion 56 as shown in the enlarged view "I", and the fitting jaw (moving upward) as shown in the enlarged view "C". 57c) is pressed and fixed to the lower part of the separation prevention | blocking projection 56a of the fitting protrusion 56. FIG.

Accordingly, one end of the mesh 50 is coupled to the outer liner 21 by the fitting piece 57 and the fitting protrusion 56.

The binding hole 58 is provided at the other end of the outer liner 21. Here, the binding hole 58 may be formed in the outer liner 21, may be formed in a separate member and coupled to the outer liner 21.

Velcro fastener (59) extends in the form of a string while forming female and male members (59a, 59b) at the other end of the mesh (50), and penetrates the binding hole (58) to couple female and male members (59a, 59b). By binding the mesh 50 to the outer liner 21. Here, the Velcro fastener 59 is adjustable in length by the combination of the male and female members (59a, 59b).

Therefore, the mesh 50 can be adjusted in the fixed position by the Velcro fastener (59).

Protective helmet 100 of the present invention may further comprise a neck hood (60). The neck hood 60 is to shield the rear of the shell 10 to protect it from heat or foreign matter. Preferably, the neck hood 60 is formed of a flameproof fiber, and a coupling member such as a snap button 61 is provided at an upper end thereof.

The neck hood 60 is coupled to the coupling piece 63 provided on the outer liner 21 described above. Coupling piece 63 is provided on the rear circumference of the outer liner 21 is formed to extend to the lower portion of the outer liner 21, the coupling member 65 corresponding to the snap button 61 of the neck hood 60 at the end ) Is provided. Here, the coupling piece 61 may be formed in the same body as the outer liner 21 as shown, may be detachably coupled to the outer liner 21.

Referring to FIG. 5, the shell 10 is provided with a storage chamber 17 in which the lens 30 is accommodated. The storage chamber 17 is a space formed by the front of the outer liner 21 installed inside the shell 10 spaced apart from the shell 10.

Therefore, since the lens 10 is stored in the storage chamber 17 when not in use, contamination or damage by foreign matters is prevented.

The inner shell 15 is provided at the inner center of the shell 10, that is, at the position where the head of the head is located. Therefore, the inner shell 15 is provided only on the upper part of the shell 10.

Here, the cushioning protrusion 15d is provided on the upper surface of the hard foam 15a of the inner shell 15. The buffer protrusion 15d separates the hard foam 15a from the shell 10 to provide a buffer space.

On the other hand, the shell 10 is provided with a chin strap 29 for fixing the shell 10 to the head therein. Jaw strap 29 may be coupled to the outerliner 21, may be integrally coupled to the inside of the shell (10).

It describes the operation of the protective helmet 100 of the present invention including the above components. Protective helmet 100 of the present invention is worn on the head when working in a place scattered with risk factors, such as fire site or construction work site.

Referring to FIG. 6, the protective helmet 100 of the present invention protects the head through the shell 10, and protects the ear and the head of the head through the neck guide 13 provided in the shell 10. In addition, the neck hood 60 is provided at the rear of the shell 10 to protect the neck portion, the lens 30 shields the front of the shell 10 to protect the face portion.

Therefore, the protective helmet 100 of the present invention protects the head from foreign matter or heat from the front, rear, side, and upward.

The liner ring 20 separates the head from the shell 10 when the shell 10 is worn on the head. At this time, the inner liner 25 is fitted to the head, the mesh 50 is coupled to the outer liner 21 to shield the upper part of the head to allow ventilation.

The inner shell 15 cushions external shocks applied to the shell 10 during operation. At this time, the inner shell 15 buffers the impact primarily by the hard foam 15a and secondly cushions the impact by the soft foam 15b.

The lens 30 protects the face by shielding the front part of the shell 10 during operation. At this time, the lens 30 is lowered by the handle 33 provided at the bottom.

When the lens 30 descends, the lens 30 descends while rotating about the hinge 45 inserted into the boss 41 about its axis. The lens 30 rotates while the projection 45a of the hinge 45 is caught by the concave-convex 43a of the concave-convex ring 43 coupled to the boss 41.

At this time, the unevenness 43a is elastically deformed through the elastic space 49 provided on the outside to smoothly rotate the protrusion 45a of the hinge 45.

On the other hand, if the lens 30 completely shields the front part of the shell 10, the lens 30 does not lower anymore. At this time, the rotation protrusion 48a which rotates together with the hinge 45 is caught by the locking jaw 48b of the uneven ring 43. Thus, lens 30 is no longer rotated.

When only a part of the lens 30 is opened during the operation, the lens 30 is held in a state where the projection 45a of the hinge 45 is caught by the unevenness 43a of the uneven ring 43, and the part is opened.

When the work is completed, the lens 30 is completely opened and stored in the storage chamber 17 provided inside the shell 10.

On the other hand, when the mesh 50 is separated for washing, after separating the fitting piece 57 to the front fitting protrusion 56 of the outer liner 21, the rear binding hole 58 of the outer liner 21 Remove the Velcro fasteners (59) bound to the back cover. Thus, the mesh 50 is easily separated from the outer liner 21.

The neck hood 60 is attached to the engaging piece 63 of the outer liner 21 during operation. At this time, the coupling piece 63 can be attached simply because it extends to the lower portion of the outer liner 21, that is, the inner side of the neck guide 13. In addition, the neck hood 60 is attached to the coupling piece 63 by the snap button 61, so when separated for washing or storage, it is easily separated from the coupling piece 63.

Since the protective helmet according to the present invention as described above can adjust the rotation angle of the lens, the face part can be partially opened and closed as necessary, and since the lens is housed inside the helmet, contamination or damage by external foreign matters is prevented. .

While specific embodiments of the present invention have been described above by way of example, these are for illustrative purposes only and are not intended to limit the protection scope of the present invention. It will be apparent to those skilled in the art that various changes, substitutions, and alterations can be made therein without departing from the spirit of the invention.

100: protective helmet 10: shell 11: rib
13: neck guide 15: inner shell 17: storage room
20: liner ring 21: outer liner 25: inner liner
30 lens 40 adjuster fastener 41 boss
43: uneven ring 43a: uneven 45: hinge
45a: protrusion 47: fastening member 48: stopper
48a: rotating projection 48b: locking jaw 49: elastic space
50: mesh 55: fastener 56: fitting
57: fitting 58: binding ball 59: Velcro fastener
60 neck necklace

Claims (9)

A shell formed in a hemispherical shape and protecting the head from an external impact;
A liner ring installed inside the shell to separate the head from the shell;
A lens having both ends rotatably fixed inside the shell; And
And an adjuster fastener fixed to the inside of the shell to enable rotation angle adjustment of the lens.
The adjuster fastener,
Bosses provided at both sides of the shell;
An uneven ring inserted into the boss and provided with unevenness on an inner circumferential surface thereof;
A hinge protruding from both ends of the lens and inserted and rotated by the concave-convex ring, and having a protrusion engaged with the concave-convex and rotating while being stepped along the concave-convex; And
And a fastening member for fastening the hinge to the boss.
And a stopper for controlling the rotation angle of the hinge.
The stopper is,
A rotating protrusion provided on the lens and rotating along an outer circumference of the concave-convex ring together with the hinge; And
Protective projection protruding on the outer circumference of the concave-convex ring to be caught by the rotating projection. delete delete The method of claim 1,
It further comprises an elastic means for inducing a smooth rotation of the projections provided on the hinge by providing elasticity to the unevenness,
The elastic means,
And an elastic space formed between the boss and the concave and convex ring to provide a flow space to concave and convex engaging with the protrusion of the hinge to elastically deform the concave and convex. The method of claim 1, wherein the shell,
A protective helmet further comprising a neck guide extending from both sides and rear to protect the ear and the head of the head. The method of claim 1,
An inner shell provided inside the shell to absorb an impact applied to the shell;
The inner shell,
A hard foam attached to an upper portion of the shell to mitigate an impact applied to the shell; And
A protective helmet comprising: a soft foam laminated on the lower portion of the hard foam, having a plurality of incisions radially, to cushion the shock transmitted to the hard foam. The method of claim 1,
A mesh coupled to the liner ring and ventilated shielding an upper portion of the liner ring; And
And a fastener for detaching and attaching the mesh to the liner ring. The method of claim 7, wherein the fastener,
A plurality of fitting protrusions protruding at one end of the liner ring;
A fitting piece embedded in one end of the mesh and integrally provided with a plurality of fitting holes coupled to the fitting protrusion;
A plurality of binding holes formed at the other end of the liner ring; And
And a Velcro fastener formed at the other end of the mesh and penetrating the binding hole to bind the mesh to the liner ring. The method of claim 1,
A coupling piece provided on the rear circumference of the liner ring and extending downward of the liner ring; And
And a neck hood coupled to the coupling piece and shielding the rear of the shell to protect the neck from heat or foreign matter.

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