JP2008121135A - Helmet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a helmet solving the problem that, because of being poor in heat-exhausting function, a conventional helmet is stuffed up with heat, leading to causing a relevant wearer's heat shock, dizziness, accident, etc. <P>SOLUTION: The helmet is so designed that a ventilative hole 5 of a large exhaust area and a protective part 6 enabling the ventilative hole 5 to be protected are formed, and both of them are furnished in the vicinity of the top of the helmet in use. In this way, in addition to securing the helmet's legal safety, heat exhaust levels via the ventilative hole 5 increase, and the natural principle: "Heat rises. Ventilation efficiency is higher, the larger the hole size (the air passing the hole represents a nearly V-shaped form)" is activated, resulting in further increase in heat exhaust levels and markedly increase in the helmet's heat-exhausting function, thus realizing the objective helmet high in genuine safety (legal safety minus anti-safety), i.e. a helmet good in ventilation and wearability and high in safety as well. Furthermore, this helmet can be structured to accomplish protection from the rain. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a helmet with ventilation holes, which is excellent in safety and wearability.

As a conventional helmet, there is a helmet provided with a protrusion in the front-rear direction on the helmet body, and a ventilation hole having one or more ventilation holes on the side of the protrusion (for example, Patent Document 1).

The solution of this Patent Document 1 is as follows, and the legal safety was cleared by reducing the area of one vent (less than 30 square millimeters). That is, as shown in FIG. 8, one or more recesses recessed from the front to the rear of the helmet are formed on a part of the front surface of the helmet, and vent holes ( One or two or more openings 6) in FIG.
Further, one or more recesses recessed from the front to the rear of the helmet are formed in a part of the front surface of the helmet, and one or both of the outer side surface and the inner side surface in the recesses have one or more vent holes opened on the side surface. Two or more opened.
If the vent is circular, the diameter is 6 mm or less and the area is 30 square millimeters or less. If the vent is square, the area is 30 square millimeters or less. The total area of the vents on one side is 225 square millimeters. The total area below the meter and near both sides was 450 square millimeters or less.

JP 2005-248364 A

1. The ultimate challenge of helmets is to realize a helmet with high true safety (legal safety, next A-anti-safety, next B) (= ideal helmet). That is, A. Clear legal safety = Clear laws and regulations such as impact resistance, shock absorption performance and penetration resistance (protective cap standards of the Industrial Safety and Health Act, etc.).
B. Improving anti-safety = Improving hot air discharge function (function to discharge hot air inside helmet), improving air permeability and wearability.
In other words, anti-safety due to poor breathability and wearability (= sweat or heat on the head or accumulation) = botting, work efficiency declines, heat stroke and other diseases Improvement of the occurrence of accidents, etc.).
This anti-safety is serious for workers engaged in outdoor work in the summer, and even more serious for people engaged in high-altitude work.
Therefore, the ultimate challenge is to realize a helmet (ideal helmet) with high true safety (A, legal safety-B, anti-safety = C, true safety).
By the way, in reality, it seems that there are many cases where true safety (= A, legal safety-B, anti-safety) is zero or less (rejected from wearing a helmet, There are a lot of people who are extremely rearward).
2. So many helmets with vents were developed, and the helmet of Patent Publication 1 was developed.
However, as described above, this helmet has a legal safety (A) cleared by reducing the area of one vent (for example, one area of Patent Document 1 is 30 square millimeters or less). Therefore, since the area of one vent hole is small, the hot air discharge efficiency per area of the vent hole (efficiency for discharging hot air in the helmet) is poor, and the vent hole portion has the highest hot air discharge efficiency. However, the heat exhaust function is poor because it is not in the vicinity of the apex (when the helmet is in the working angle).
3. Therefore, the subject of the present invention is to greatly improve the hot air discharge function.
More specifically, a vent hole part (5) having a large exhaust area and a protective part (6) capable of protecting the vent hole part are developed, and the vent hole part (5) and the protective part are protected. The part (6) is installed near the top of the helmet in use, and this ensures legal safety and greatly improves the hot air exhaust function, thereby ensuring true safety (A, legal safety-B, It is to realize a helmet with high anti-safety (a helmet with good ventilation and wearability and high safety).

The first problem solving means is:
A. A front and rear protrusion is provided on the helmet body (2) between the upper part (11) of the helmet and the rear part (12) of the helmet, and a vent hole is provided on the side of the protrusion. B) The vent hole portion is either a vent hole portion (5a) having one or more vent holes (4) having an area exceeding 30 square millimeters, or a vent hole portion (5b) having a plurality of vent holes densely arranged. Or a vent hole portion (5) corresponding to all (5a and 5b). C. The outer portion of the projection on the outside of the vent hole portion (5) is reinforced, and this vent hole portion (5) It was made into the protection part (6) which protects.
D. These will be briefly explained using conventional forms. The vent hole portion 101 provided in the projection 100 of the conventional helmet shown in FIG. 8 is advanced and developed into the vent hole portion 5. This means that the outer portion 102 of the protrusion outside the pore portion 101 is also advanced and developed to be the protective portion 6.

The second problem solving means is that the protective part (6) has at least the outer surface (6c) of the protective part in the shape of an oval arch projecting outward as a whole. The radius of curvature (6d) of the circular arch shape was made smaller as a whole compared to the radius of curvature around this protective part.

In the third problem solving means, a material different from the material used for the helmet body is used for a part or all of the protective part (6).

The fourth problem solving means is provided with protruding portions (6f) protruding in the left-right direction on both sides of the protective portion (6).

The fifth problem-solving means is provided with a reinforcing rib (6a) in the front-rear direction that protrudes inwardly inside the protective part (6).

The sixth means for solving the problem is that the rib (13a) in the left-right direction is integrated with the partition wall (13) having at least one side between the vent holes (4) and is attached to the protective part (6). Provided.

The seventh problem solving means is that the protective part (6) is integrally connected to the substantially reverse U-shaped tunnel part (8) in the front-rear direction protruding from the helmet body (2).

The eighth problem-solving means is that a rear part (12) of the helmet is formed with an extended part (9) extended outward, and the rear part of the helmet body in a form corresponding to the outer side surface (9a) of the extended part. And a portion (2b) of the portion (2a) corresponding to the upper portion (9b) of the extended portion receives the rear end (6k) of the protective portion. A stop (2b (12a)) was used.

The ninth problem-solving means is that the protective part (6) is provided in the part after the rear side (11a) of the upper part of the helmet.

The tenth problem solving means is that the protection part (6) is a rear-falling type in which the front end (6j) of the protection part is above the rear end (6k) of the protection part.

In an eleventh problem solving means, the protection member (6) is provided with a cushion member (7).

In the first problem solving means,
A. Because the front and rear protrusions are provided on the helmet body (2) between the upper part (11) of the helmet and the rear part (12) of the helmet, and the vents are provided on the sides of the protrusions. , This vent will be the place where the heat inside the helmet is exhausted most efficiently (= the place where the natural reason that the heat rises the most), the amount of heat exhausted inside the helmet increases, And the effect of improving the efficiency of the discharge is exhibited.
B) The ventilation hole is either one of the ventilation hole (5a) having one or more ventilation holes (4) having an area exceeding 30 square millimeters, or the ventilation hole (5b) having a plurality of ventilation holes densely arranged. Alternatively, since the ventilation hole portion (5) corresponding to all (5a and 5b) is used, the ventilation area of the ventilation hole portion (5) is increased, and “the larger the ventilation efficiency, the better the air (the air passing through the hole is substantially V-shaped)” The natural reason that works, increases the amount of the hot air discharge, and increases the efficiency of the discharge.
C. By strengthening the outer part of the projection on the outside of the vent hole part (5) to form a protective part (6) for protecting the vent hole part (5), the vent hole part (5) ), And the heat exhaust function can be greatly improved. .

In the second problem solving means,
At least, the outer surface (6c) of the protective part has an oval arch shape projecting outward as a whole, and the radius of curvature (6d) of the oval arch shape is set to the protective part. By making it smaller as a whole compared to the radius of curvature around
The stone bridge principle will work (= shock load will be received by compressive force), the strength of the protection will be further strengthened, and the protection of the ventilation holes will become stronger, so One area can be increased, the heat inside the helmet can be discharged more smoothly and more smoothly, and the heat discharge function can be greatly improved.

In the third problem-solving means, the strength of the protective part (6) is adjusted as necessary by using a material different from the material used for the helmet body for a part or all of the protective part (6). The protection part (6) can be made compact, and the protection part (6) can be made as required.

In the fourth problem solving means, since the protruding portions (6f) protruding in the left-right direction are provided on both sides of the protective portion (6), it is possible to form a rain shield and to further enhance the strength of the protective portion (6). It can be strengthened (= the area of one ventilation hole can be increased), and the hot air discharge function can be greatly improved.

In the fifth problem solving means, since the reinforcing rib (6a) in the front-rear direction protruding inward is provided inside the protective part (6), the protective part is further strengthened, and the strength and shape of the protective part are related. The above effect is further enhanced, and the effect of improving the hot air discharge function is exhibited.

In the sixth problem solving means, the rib (13a) in the left-right direction is integrated with the partition wall (13) having at least one side between the vent holes (4) and is attached to the protective part (6). Since it provided, a protection part is further strengthened and the effect of raising the effect of the said 5th problem-solving means more is exhibited.

In the seventh problem-solving means, the protective part (6) is integrally connected to the longitudinally reverse U-shaped tunnel part (8) projecting from the helmet body (2) so that the heat in the helmet is increased. Since it comes to be discharged from the vent hole through the tunnel (3), this heat can be discharged more smoothly and in a large amount, and at the front end (6j) of the protective part. Since the helmet body (2) will firmly receive the generated compressive force through this tunnel part, the protection part becomes stronger, and the above-mentioned effects relating to the strength and shape of the protection part are further enhanced. , The effect of improving the heat exhaust function more.

In the eighth problem-solving means, the rear part (12) of the helmet is formed with an extended part (9) extended outward, and the rear part of the helmet body in a form corresponding to the outer surface (9a) of the extended part. (2a) and a rear end receiving part (2b) corresponding to the upper part (9b) of the extended part in the part (2a), which receives the rear end (6k) of the protective part ( 12a), the compression force generated at the rear end (6k) of the protective part is received by a part (2a, 2b) of the rear part of the helmet body, and by extension, the helmet body 2 is firmly received. As a result, the protective part becomes stronger, and the effects related to the strength and shape of the protective part are further enhanced, and the effect of improving the hot air discharge function is exhibited.

In the ninth problem solving means, by providing the protective part (6) in the part after the rear side (11a) of the upper part of the helmet, the vent hole part (5) protected by the protective part (6) The hot air inside the helmet will be in the place where the heat is discharged most smoothly and in a large amount, and the effect of improving the hot air discharging function is exhibited.

In the tenth problem solving means, the helmet is used by making the protection part (6) a rear-falling shape in which the front end (6j) of the protection part is above the rear end (6k) of the protection part. Under the condition of the state, the heat in the helmet is discharged most smoothly and in a good amount, so that the heat is discharged smoothly and the heat discharge function is further improved.

In the eleventh problem solving means, the cushion member (7) is provided with the cushion member (7) in the protection portion (6), so that the cushion member (7) softens the impact, the shock absorbing performance of the protection portion is improved, and the strength of the protection portion is increased. The said effect further increases and the effect that a hot air discharge function improves more is exhibited.

As described above, according to the present invention, the vent hole portion (5a) having one or more vent holes (4) having an area exceeding 30 square millimeters, and the vent hole portion (5b) having a plurality of vent holes densely arranged. Can be realized, and a protective part (6) for protecting the vent part (5) can be realized, so that the heat in the helmet can be 5) Since the vent hole (5) and the protective part (6) can be provided near the top of the helmet during use, the heat rises. The natural reason of “moderately good (the air passing through the hole is approximately V-shaped)” has become active, and the heat can be discharged more smoothly and in large quantities, greatly improving the heat exhaust function. , Breathability and wearability are greatly improved and true safety Can be A · legal security over B · anti safety) to achieve a high helmet (also high helmets good safety wear resistance).
Moreover, it can also be constructed to prevent rain.

  Hereinafter, the form (5a, 5b) of the vent hole portion 5 according to the present invention will be described with reference to the drawings by comparing with the conventional one.

A. Form of the vent hole part 1 No. 1 * Vent hole part 5a
(1) The area of one conventional vent is 30 square millimeters or less (see Patent Document 1),
(A) The ventilation hole 5a is a ventilation hole 5a having one or more ventilation holes 4 having an area exceeding 30 square millimeters.
For example, the vent holes in FIGS. 2 and 3 are also the vent holes 5a having one vent hole 4 having an area exceeding 30 square millimeters (two on both sides), and the vent hole in FIG. The portion is also a vent portion 5a having three vent holes 4 (6 in total on both sides) having an area exceeding 30 square millimeters.
B. Form of vent hole part 2 2. Vent hole part 5b
(1) In the conventional vent hole part, the interval between the vent holes was wide (= the area of the partition wall was larger than the area of the vent hole),
(2) The ventilation hole portion 5b has a plurality of ventilation holes densely (= the area of the partition is smaller than the area of at least one of the ventilation holes). As shown in FIGS. The area of one partition wall 13 in the vent hole portion 5 having the pores 4 is smaller than at least the larger area (for example, 4a in FIG. 6) of the vent holes 4 on both sides of the partition wall. It is.
C. Form of vent hole part 3 Part 3. vent hole part 5
The vent hole portion 5 corresponds to any or all of the vent hole portion 5a and the vent hole portion 5b (the vent hole portion 5a and the vent hole portion 5b). Therefore, the vent hole portion 5a is also a vent hole portion. Both 5b and all (5a and 5b) are in the form of the vent hole 5. For example, the vent holes 5 in FIGS. 4, 5, and 6 correspond to all (5a and 5b).

As described above, the sign of the vent hole 5a is 5 or 5 (5a) or 5a, the sign of the vent hole 5b is 5 or 5 (5b) or 5b, and the sign of all (5a and 5b) is 5 or It is displayed in the form of 5 (5a, 5b).

  Hereinafter, the whole of the present invention and the first embodiment will be described with reference to the drawings.

In FIG. 2, when a person correctly wears the helmet 1 and looks straight ahead, the tangent angle of the upper outer surface of the helmet 1 is approximately 45 degrees with respect to the vertical, and the interval between 1a is the upper portion 11 of the helmet. The hermet body 2 between the upper part 11 and the rear part 12 of the helmet has a front-rear direction protrusion, and a vent hole 5 (5a) is provided on the side of the protrusion.
Further, the outer part of the protrusion outside the vent hole part 5 (5a) is a protective part 6, and the protective part 6 is supported by the helmet body 2 at the front end 6j and the rear end 6k of the protective part. The vent hole portion 5 (5a) is protected in the form of a ring, and the strength of the protective portion 6 is higher than the strength around the protective portion.
Note that the front end 6j and the rear end 6k of the protection portion are in the vicinity where the tangential angles around the vent hole portion 5 are 60 degrees (see also FIGS. 2 and 6).
The vent hole 5 (5a) has one vent hole 4 (two in total on both sides) and the area of the vent hole 4 exceeds 30 square millimeters. The vent hole portion 5 (5a) is also a vent hole portion 5a having one or more vent holes 4 having an area exceeding 30 square millimeters.
Further, as shown in FIG. 3, a cap-shaped impact absorbing member 14 made of an elastic material such as foamed polystyrene is lined on the inner side of the helmet, and the impact absorbing member 14 has a groove 13a and a hole 14b. By these, the heat in a helmet comes out from the hole 14b to the groove | channel 14a, and comes out from the vent hole 4. FIG.

  Hereinafter, second to fourth embodiments of the protection unit 6 according to the present invention will be described with reference to the drawings.

2nd Embodiment of the protection part 6. FIG.
As shown in FIG. 3, both the inner side surface 6b and the outer side surface 6c of the protective portion have an oval arch shape projecting outward, and the curvature radius 6d ( = The radius of curvature of the protective part 6 (see also FIG. 3) is smaller as a whole than the radius of curvature around the protective part 6, and the principle of the stone bridge works.
The inner surface 6b of the protection unit 6 is preferably in the shape of an ellipse arch, but it is not necessarily required to have the shape of an ellipse arch. For example, it may be linear.

3rd Embodiment of the protection part 6. FIG.
As shown in FIG. 5, a stainless steel reinforcing member 6 e is provided as a part of the protection unit 6.
As described above, the protection unit 6 may be used for a part or all of the protection unit 6, if necessary, a material different from the material (reinforced plastic or the like) used for the helmet body 2. . For example, the entire protective portion 6 may be made of carbon resin.

4th Embodiment of the protection part 6. FIG.
As shown in FIG. 4, protrusions 6 f that protrude in the left-right direction are provided on both sides of the protection part 6, and the protrusions 6 f form a rain shield.
Note that the protruding portion 6f only needs to protrude on both sides of the protective portion. Therefore, a part of the protective portion (for example, a stainless steel reinforcing material 6e (FIG. 5) or the like) or a portion provided on the protective portion ( For example, the cushion member 7 (FIG. 7) and the like] are protruded on both sides.

Hereinafter, fifth and subsequent embodiments of the protection unit 6 according to the present invention will be described.

  4 and 5, one or a plurality of reinforcing ribs 6 a protruding inward are provided inside the protective portion 6.

In FIG. 4, left and right partition ribs 13 a are provided in the protection unit 6 in such a manner that one side of the rib 13 a is integrated with the outside of the partition wall 13 between the vent holes 4.
In addition, the rib 13a for a partition is also provided in the protection part 6 in the form united with the inner side of the partition 13 as needed.

  As shown in FIG. 1 to FIG. 3, the protection unit 6 is integrally connected to a substantially reverse U-shaped solid (no vent hole) tunnel portion 8 projecting from the helmet body 2 in the front-rear direction.

  In the rear part 12 of the helmet in FIG. 3, an extended part 9 extended outward is formed, and a part 2 a of the rear part of the helmet body is formed in a form corresponding to the outer side surface 9 a of the extended part, and The rear end receiving portion 12a for receiving the rear end 6k (see also FIG. 2) of the protective portion is the “part 2b corresponding to the upper portion 9b of the extended portion (see also [B] in FIG. 1)” in the portion 2a. Accordingly, a part 2b (12a) of the helmet body 2 receives an impact received by the protection unit 6, and the helmet body 2 receives the impact.

In FIG. 2, the protection part 6 is provided in the part after the rear side 11a of the upper part of a helmet.
The rear side 11a of the upper part of the helmet is the one when the upper part 11 of the helmet is divided into the front side and the rear side (1/2 of the upper part 11 of the helmet).

  In FIG. 2, the front end 6j of the protection part is a rear-falling shape in which the front end 6j is above the rear end 6k of the protection part.

  In FIG. 7, a cushion member 7 is provided on the outer surface of the protection unit 6. A stainless steel reinforcing member 6e (see also FIG. 5) or the like may be provided on the cushion member 7.

  In addition, there are the following embodiments according to the present invention.

  2 and 6, a part of the vent hole has a substantially arched shape 10 along the outer side of the protective portion 6, and thus, one vent hole has a large area. Yes.

  As shown in FIG. 6B, the interval 5f between the front end 5d and the rear end 5e of the vent hole portion is 20 mm or more and 120 mm or less, thereby providing the vent hole portion 5 at the most desirable place. be able to.

The area of one vent hole 4 in the embodiment of the present invention is over 30 square millimeters except for FIG.
For example, the area of one of the vent holes 4 in FIG. 3 when the original size is obtained is about 270 square millimeters, and in the case of FIG. 6, the larger one (middle vent hole 4a) is about 120 square millimeters and small. About 70 square millimeters.

  The helmet 1 of the present invention is configured as described above, and can achieve the above effects.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows one of the embodiment of the helmet based on this invention, [A] is the perspective view seen from the front upper direction [B] is the perspective view seen from the rear upper direction The side view which shows 1st Embodiment of the helmet which concerns on this invention 2 is a longitudinal sectional view The perspective view which shows the modification of the protection part vicinity of the helmet which concerns on this invention The perspective view which decomposes | disassembles and shows the modification of the protection part vicinity of the helmet which concerns on this invention It is a figure which shows the modification of the ventilation hole part vicinity of the helmet which concerns on this invention, [A] is a side view which shows the modification, [B] is a communication figure which took out and showed only the ventilation hole part of [A]. It is a figure of a pore part. It is a side view which shows the modification (The ventilation hole part 5b in which the several ventilation hole whose one area is 30 square millimeters or less is dense) of the ventilation hole part of the helmet based on this invention, and the cushion member 7 It is a side view which shows the protection part 6 which provided. The perspective view which shows embodiment of the conventional helmet with a vent hole

Explanation of symbols

1 Helmet
1a When the contact angle is approximately 47 degrees with respect to the vertical
2 Helmet body
2a Part of the rear part of the helmet body
2b Part 3 corresponding to the upper part of the extended part
3a Outer surface 3b The inner surface of the protrusion
3c Outer side of the projection 4 Ventilation hole 4a The larger one of the ventilation holes 4b A part of the ventilation hole 5 A ventilation hole portion [= a passage corresponding to one or all of the following 5a and the next 5b (5a and 5b) (Porosity)
5a Ventilation hole 5b having one or more ventilation holes whose area exceeds 30 square millimeters Ventilation hole 5c having a plurality of ventilation holes densely The outer surface 5d of the ventilation hole 5e The front end 5e of the ventilation hole Distance between rear ends 5f 5d and 5e 6 Protective part 6a Reinforcing rib 6b Protective part inner surface 6c Protective part outer surface 6d Oval arch-shaped radius of curvature (= curvature radius of protective part outer surface)
6e Stainless steel protective member
6f Protruding part 6j Front end of protective part
6k Rear end 7 of protection part Cushion member 8 Tunnel part 9 Extension part 9a Outer side surface 9b Upper part of extension part 10 Approximate arch shape 11 along the outer side of protection part 11 Upper part of helmet 11a Rear of upper part of helmet Side 11b Between the rear side of the upper part of the helmet and the rear part of the helmet 12 Rear part 12a of the helmet Rear end receiving part 13 Partition
13a Partition rib 14 Shock absorbing member 14a Groove 14b Hole 100 Protrusion 101 in conventional helmet Ventilation hole provided in side of conventional protrusion 100
102 “Outside part of protrusion” on the outside of the conventional vent 101

Claims (11)

When the helmet is correctly worn and looking straight ahead, the upper tangent angle of the upper outer surface of the helmet is approximately 45 degrees (1a) with respect to the vertical, and the upper part (11) of the helmet is used. The helmet body (2) between (11) and the rear part (12) of the helmet is provided with a projection in the front-rear direction, and a vent hole is provided on the side of the projection,
In addition, this vent hole portion is either a vent hole portion (5a) having one or more vent holes (4) having an area exceeding 30 square millimeters, or a vent hole portion (5b) having a plurality of vent holes densely arranged. Or all (5a and 5b) corresponding to the vent hole (5),
And strengthening the outside part of the projection on the outside of the vent hole part (5), it becomes a protective part (6) for protecting the vent hole part (5),
And this protection part (6) is provided in the outer side of the said vent hole part (5) in the form by which the front end (6j) and rear end (6k) of this protection part were supported by the helmet body (2). And a helmet characterized in that the strength of the protective portion (6) is higher than the strength around the protective portion (6). At least, the outer surface (6c) of the protective part (6) has an oval arch shape projecting outward as a whole, and the curvature radius (6d) of the oval arch shape is as follows: The helmet according to claim 1, wherein the helmet is smaller as a whole than the radius of curvature around the protective portion. The helmet according to any one of claims 1 and 2, wherein a material different from a material used for the helmet body is used for a part or all of the protection part (6). The protrusions (6f) protruding in the left-right direction are provided on both sides of the protection part (6), and the protrusions (6f) form a rain shield. The helmet according to any one of 3 to 3. The helmet according to any one of claims 1 to 4, wherein a reinforcing rib (6a) in the front-rear direction protruding inward is provided inside the protective part (6). The rib (13a) for the partition wall in the left-right direction is provided in the protective part (6) so as to be integrated with the partition wall (13) having at least one side between the vent holes (4). The helmet according to any one of claims 1 to 5. The said protection part (6) was integrally connected with the substantially reverse U-shaped tunnel part (8) of the front-back direction protrudingly provided at the helmet main body (2). Helmet, In the rear part (12) of the helmet, an extended part (9) extended outward is formed, and a part (2a) of the rear part of the helmet body is formed corresponding to the outer surface (9a) of the extended part. And a rear end receiving portion (2b (12a)) for receiving a rear end (6k) of the protective portion at a portion (2b) corresponding to the upper portion (9b) of the extended portion in the part (2a). The helmet according to any one of claims 1 to 7, characterized in that: The helmet according to any one of claims 1 to 8, characterized in that the protective part (6) is provided in a part after the rear side (11a) of the upper part of the helmet. 10. The protective part (6) according to any one of claims 1 to 9, characterized in that the protective part (6) has a front-end (6j) that is lower than the rear end (6k) of the protective part. The helmet described in. 11. A helmet according to any one of claims 1 to 10, characterized in that a cushion member (7) is provided in the protective part.

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