JP2005105487A - Ventilation structure for helmet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation structure for a lightweight helmet having high shock-absorbing tendency and high air permeability. <P>SOLUTION: The ventilation structure has the following construction: The bottom 21 of a shock-absorbing liner 12 is provided with holes 22 through which it communicates with an interior pad 13. The upper surface 24 of lattice-like wall parts 23 erected longitudinally and transversely on the bottom 21 is provided with ventilative grooves 25 through which these wall parts 23 communicate with each other. Owing to the holes provided on the bottom of these wall parts 23 and the ventilative grooves 25, perspired water vapor and heat emitted from the head flow via the ventilative grooves 25 arranged on the upper surface of the wall parts 23 of the liner 12 into the outside. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a helmet ventilation structure having an enhanced function of improving the air permeability inside the helmet.

  Helmets that protect the head are generally equipped with a fiber reinforced resin shell body and an impact-absorbing liner made of styrene foam (hereinafter referred to as a foam material). A multilayer structure. Among them, the impact absorbing liner is an important member that absorbs impact energy.

In order to improve the shock absorbing performance of a helmet, an aluminum honeycomb block in which a shock absorbing liner for a helmet has a honeycomb structure and the liner is formed of aluminum has been proposed.
Japanese Patent Laid-Open No. 9-105013 (FIG. 1)

FIG. 13 is a reproduction of FIG. However, some element names were changed and some element names were added.
This shows that a honeycomb block 104 composed of a large number of honeycombs 102 formed of a thin plate material 103 is attached to the shell body 101 of the helmet 100.

  In order to manufacture a honeycomb block 104 composed of a large number of honeycombs 102, thin plates having different thicknesses are stacked in a coil shape at both ends, and the thin plates are fixed at predetermined positions and expanded to form a honeycomb block 104 having a given shape. Assemble as a liner inside the shell body 101 of the helmet 100. Note that the opening of the honeycomb 102 is denoted by 105.

FIG. 14 is a diagram for explaining the problems of the prior art, and shows that the sweat vapor or heat of the head that has entered the honeycomb is blocked by the shell body and cannot stay and diffuse to the outside.
The honeycomb 102 has openings 105 on the upper and lower sides. However, the perspiration vapor and heat that diverges from the head is blocked by the honeycomb walls 106 and 106 and the shell body 101 and stays in the direction of the arrow b in the figure.

  That is, since the honeycomb 102 is closed by the honeycomb walls 106, 106, the sweat vapor and heat that diverge from the head cannot flow in the direction of the arrow a, and the sweat vapor and heat from the head stay.

  It is an object of the present invention to provide a helmet ventilation structure having good shock absorption and excellent breathability.

  The invention according to claim 1 is a helmet comprising a shell body, an impact absorbing liner provided inside the shell body, and an interior pad that is provided inside the impact absorbing liner and contacts the head, wherein the impact absorbing liner is curved. This wall has a bottom on the surface of the interior pad that is a convex surface, and a hole that communicates with the interior pad is provided on the bottom, and a wall is vertically and horizontally raised from the bottom toward the surface of the shell body that is a curved concave surface. A ventilation groove is provided in the part.

The shock-absorbing liner has a bottom on the surface of the interior pad that is a curved convex surface, and this bottom is a curved surface on the head side, and can receive an impact on the entire curved surface. Can be demonstrated.
Moreover, it becomes possible to make an impact-absorbing liner having good rigidity by freely raising the wall part vertically and horizontally from the bottom part toward the surface on the shell body side.

In addition, a hole communicating with the interior pad was provided in the bottom of the shock absorbing liner, and a ventilation groove was provided in the wall portion that was vertically and horizontally from the bottom.
Sweating vapor and heat from the head enter the shock absorbing liner through a hole in the bottom, and the sweat vapor and heat from the head that has entered the shock absorbing liner pass through the ventilation groove on the liner wall to the outside. Can flow.

  The invention according to claim 2 is characterized in that the ventilation groove is provided so as to avoid a connecting portion where vertical and horizontal wall portions intersect.

Since the ventilation groove is provided in the wall portion so as to avoid the connecting portion where the vertical and horizontal wall portions intersect, the rigidity of the shock absorbing liner is not impaired.
Since the walls communicate with each other through this ventilation groove, the air in the shock absorbing liner can flow outside without impairing the rigidity of the shock absorbing liner.

The invention according to claim 3 is characterized in that the impact-absorbing liner is formed of a resin elastic body.
Since it was molded using a resin elastic body, the weight can be reduced. In addition, since it is an elastic material, the impact-absorbing liner deformed by a light impact force can be easily restored to its original shape.

  In the invention according to claim 1, the shock absorbing liner is provided with a bottom surface provided on the interior pad side, a hole opened in the bottom surface, a wall portion standing vertically and horizontally from the bottom surface, and a ventilation groove formed in these wall portions. Therefore, there is an advantage that both good shock absorption performance and good breathability can be achieved.

  In the invention according to claim 2, since the ventilation groove attached to the wall portion is provided avoiding the connecting portion where the vertical and horizontal wall portions intersect, air in the shock absorption liner can be easily discharged without impairing the rigidity of the shock absorption liner. There is an advantage that it can flow outside.

  In the invention which concerns on Claim 3, since the impact-absorbing liner was formed with the resin elastic body, there exists an advantage that it is lightweight and can be easily decompress | restored to the original shape with respect to a light impact force.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a sectional view of a helmet ventilation structure according to the present invention.
The helmet 10 includes a helmet impact absorbing liner 12 integrally molded and assembled inside the shell body 11 and an interior pad 13 assembled inside the impact absorbing liner 12 as main elements.
In addition, 14 is a windshield plate, 15 is a front air port, and 16 is a rear air port.

  2 is an enlarged view of two parts of FIG. 1. The shock absorbing liner 12 has a bottom 21 on a surface 18 on the side of the interior pad 13 that is a curved convex surface, and a hole communicating with the interior pad 13 on the bottom 21. Are provided, and a wall portion 23 is vertically and horizontally raised from the bottom portion 21 toward the surface 19 on the shell body 11 side which is a curved concave surface. It is shown that ventilation grooves 25, 25.

  Further, the V-shaped part provided on the wall part 23 standing from the bottom part 21 of the liner 12 is a part where a pair of hypotenuses forming V-shaped cuts are welded to each other. It was expressed by a slight V-shaped cut shape.

FIG. 3 is a perspective view of a part of the liner according to the present invention, showing the shape of a part of the shock absorbing liner 12 for helmet.
A wall portion 23 stands vertically and horizontally from the bottom portion 21, the bottom portion 21 is divided into small bottom portions 31, 31... By the vertical and horizontal wall portions 23, and holes 22, 22. Are provided with ventilation grooves 25, 25. Then, the back side of the figure was curved so as to be a concave curved shape so as to match the inner convex shape of the shell body of the helmet, and a part was welded.

  That is, in order to make the liner 12 into a curved shape, wall welded portions 32, 32... In which a pair of oblique sides forming V-shaped cuts of the wall portion 23 are welded, and the bottom portion 21 are formed into vertical and horizontal wall portions. Are provided with bottom welded portions 33, 33,...

Hereinafter, the manufacturing method of the impact-absorbing liner of the present invention will be described with reference to FIGS.
FIG. 4 is a diagram showing a molding process according to the present invention.
A mold 38 comprising a movable mold 35 having a cavity 34 corresponding to the shape of the molded body and a fixed mold 37 having a spool 36 for guiding the molten resin to the cavity 34 is prepared.
Then, by injecting the molten resin plasticized by the injection cylinder 39 into the cavity 34 through the spool 36, a mold forming step is performed to obtain a molded body.

FIG. 5 is a plan view of the molded body according to the present invention, and shows the molded body molded in the mold molding step.
The molded body 30 has vertical and horizontal wall portions 23 standing in front of the drawing from the bottom portion 21 at the back of the drawing.
And the wall part 23 has the vertical sides 41, 42, 43, 44... And the horizontal sides 45, 46, 47, 48.・ ・ Consists of And these vertical sides 41, 42, 43, 44 ... and horizontal sides 45, 46, 47, 48 ... were combined.

Moreover, the bottom part 21 consists of the small bottom parts 31, 31 ... as mentioned above. And the hole parts 51, 51 ... opened in the small bottom parts 31, 31 ... were provided.
Further, the upper surface 24 of the wall portion 23 is provided with ventilation grooves 25, 25.

6 is a cross-sectional view taken along line 6-6 in FIG. 5, and shows that a large number of holes 51, 51... Are formed in the bottom 21 and the wall 23 is vertically and horizontally erected from such a bottom 21. FIG.
Further, the wall portion 23 is provided with V-shaped cuts 52, 52. The V-shaped cuts 52, 52,... Have a pair of oblique sides 53a, 53b,.

  FIG. 7 is a perspective view of a part of the molded body according to the present invention, in which the bottom 21 is divided into small bottom portions 31, 31... And each small bottom part 31,31 ... was equipped with the hole part 51,51 ... made into the shape of a substantially cross shape, and the wall part 23 was equipped with the V-shaped cut | notch 52,52 ... Indicates.

As described above, the ventilation grooves 25, 25... Are provided on the upper surface 24 of the wall portion 23.
The ventilation grooves 25, 25,... Provided on the upper surface 24 of the wall portion 23 may be provided avoiding a connecting portion where the vertical and horizontal wall portions 23 intersect each other, or may not be a connecting portion. That is, there is no restriction on the position of the ventilation grooves 25, 25,.

Returning to FIG. 5, the holes 51, 51... Of the small bottom portions 31, 31.
One hole 51 includes upper planes 54 and 54, lower planes 55 and 55 arranged to face the upper planes 54 and 54, and left plane 56 arranged by changing the direction of the upper planes 54 and 54 by 90 °. , 56, the right side planes 57, 57 disposed opposite to the left side planes 56, 56, and the left side plane 56 and the upper side plane 54 so as to cut out corners of the upper, lower, left, and right side planes. The upper left curved surface 58 disposed at the right, the lower right curved surface 59 disposed opposite to the upper left curved surface 58, the upper right curved surface 61 disposed between the right plane 57 and the upper plane 54, and the upper right curved surface 61. The lower left curved surface 62 is arranged.

  Each small bottom portion 31 has a hole 51, and the small bottom portions 31, 31. Through the bending process, the opposing flat surface portions of the hole portions 51, 51... Are in contact with each other, and the curved surface portions 58, 59, 61, 62 (see FIG. 3) form the respective holes 22.

Thus, the molded body 30 has a regular shape mainly composed of vertical and horizontal planes. For this reason, it is easy to process and finish the cavity of the mold, and the molded body 30 can be formed with a mold having a simple structure.
As a result, the mold cost of the mold forming process can be suppressed.

  FIG. 8 is an operational view of a V-shaped cut according to the present invention, in which a molded body with V-shaped cuts 52, 63, 64 is bent and formed into a shape having a predetermined curvature for each part. Explain that you can.

In (a), a V-shaped cut 52 with a cut angle of θ1 is put in the wall 23, and a V-shaped cut 63 with a cut angle of θ2 is put next to the wall 23, and the cut angle is similarly θ3. A certain V-shaped cut 64 is made.
Next, the wall portion 23 is curved so as to be convex upward as a whole. Due to this bending, the pair of hypotenuses 53a and 53b constituting the cut 52 are brought into contact with each other. Similarly, a pair of hypotenuses 65a and 65b constituting the cut 63 abut each other, and a pair of hypotenuses 66a and 66b constituting the cut 64 abut.

(B) shows that the V-shaped cuts 52, 63, 64 are in a single line by contacting a pair of oblique sides 53a and 53b, 65a and 65b, and 66a and 66b, respectively.
As a result, the lower edge of the wall portion 23 becomes a polygon bent at angles θ1, θ2, and θ3. Accordingly, the desired curvature can be obtained very easily by setting the angles θ1, θ2, and θ3.

FIG. 9 is an explanatory diagram of the bending process of the molded body, and a specific example of the bending process of the molded body 30 will be described.
An upper die 67 having a concave surface 67a and a lower die 68 having a convex surface 68a are prepared. Next, the molded body 30 is placed on the lower mold 68 and the upper mold 67 is lowered.

  In this embodiment, the molded body 30 is curved by a mold, but the means is not limited to the mold as long as the hypotenuses of the V-shaped cuts of the molded body 30 can be set in contact with each other. For example, the molded body 30 may be curved and fixed with a jig or the like.

  FIG. 10 is an explanatory diagram of the heating process, in which the molded body 30 is bent in the molded body bending process, and a plurality of heat generations are arranged in the lower mold 68 in a state where the V-shaped cuts of the molded body are in contact with each other. Indicates that the body is exothermic.

  That is, the heating elements 71a, 71b, 71c arranged in the lower mold 68 are heated so as to be provided in the holes 51, 51... Of the small bottom portions 21, 21. The mating portions of these planes are heated to the melting point or more so that the formed pair of planes (the upper plane 54 and the lower plane 55 and the left plane 56 and the right plane 57) are welded to each other. Similarly, the cut portions are heated to the melting point or higher so that the pair of oblique sides 53a and 53b, 65a and 65b, and 66a and 66b of the V-shaped cuts 52, 52. Note that there is no restriction on the heating order and timing of the heating elements 71a, 71b, 71c of the lower mold 68.

  In this embodiment, the heating element 71 is disposed in the lower mold 68. In the molded body bending process, the position of the heating element 71 in the heating process may be arranged inside the mold / jig, on the surface of the mold / jig, or from the mold / jig. They may be arranged apart from each other, and there are no restrictions on the positions where the heating elements are arranged.

FIG. 11 is an operational view of the ventilation structure of the helmet.
The shock absorbing liner 12 has a bottom portion 21 on the surface 18 on the interior pad 13 side, and this bottom portion 21 is a curved surface on the head side, and can receive an impact on the entire curved surface. It can be demonstrated.
Further, the wall portion 23 can be freely set vertically and horizontally from the bottom portion 21 toward the surface on the shell body 11 side, so that the impact absorbing liner 12 having good rigidity is obtained.

Sweating vapor or heat from the head enters the shock absorbing liner in the direction of the arrow a from the holes 22, 22... Provided in the bottom 21 so as to communicate with the interior pad 13.
Next, the sweating vapor and heat of the head that has entered the shock absorbing liner flow to the outside through the ventilation grooves 25, 25,...
As a result, sweat vapor and heat trapped in the head can be easily released to the outside, so that the occupant can continue to wear the helmet more comfortably.

At this time, if the wind shield plate 14 is opened a little to let air flow from the front air port 15 in the direction of the arrow b in the figure, the ventilation effect can be further improved.
As a result, it is possible to form a ventilation structure of a helmet having good shock absorption and excellent breathability.

  FIG. 12 is a view of another embodiment of FIG. 2. The shock absorbing liner 12 has a bottom 21 on a surface 18 on the side of the interior pad 13 that is a curved convex surface, and a hole communicating with the interior pad 13 on the bottom 21. 22 (... indicates a plurality; the same applies hereinafter), and a wall portion 23 is erected vertically and horizontally from the bottom portion 21 toward a surface 19 on the shell body 11 side which is a curved concave surface.

In (a), the positions of the ventilation grooves 25, 25... Are provided on the bottom 21 side of the wall 23.
In (b), the positions of the ventilation grooves 25, 25... Were provided as ventilation holes near the center of the wall portion 23.
Thus, the position of the ventilation groove 25 may be arranged not only on the upper surface 24 of the wall portion 23 but also in the vicinity of the center of the wall portion 23 or on the bottom 21 side. Further, these shapes may be changed as appropriate.

In the present embodiment, the space of the plane portion composed of the vertical and horizontal wall portions is a quadrangle (see FIG. 5).
The material of the molded body is preferably a resin such as polypropylene, polyethylene, or polyamide, but may be made of rubber or metal such as aluminum, and the type thereof is not limited.

Further, there are no restrictions on the size of the ventilation groove and the hole.
Furthermore, the number of ventilation grooves and holes can be arbitrarily reduced by appropriately decimating the ventilation grooves depending on the location of the head.

  The ventilation structure of the helmet according to the present invention is suitable for a helmet.

It is sectional drawing of the ventilation structure of the helmet which concerns on this invention. FIG. 2 is an enlarged view of part 2 of FIG. 1. 1 is a perspective view of a liner according to the present invention. It is a figure which shows the shaping | molding process based on this invention. It is a top view of the molded object which concerns on this invention. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a one part perspective view of the molded object which concerns on this invention. It is an effect | action figure of the V-shaped notch based on this invention. It is explanatory drawing of a molded object bending process. It is explanatory drawing of a heating process. It is an effect | action figure of the ventilation structure of a helmet. It is another Example figure of FIG. It is a reprint figure of patent document 1. FIG. It is a figure explaining the subject of a prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Helmet, 11 ... Shell body, 12 ... Shock absorption liner, 21 ... Bottom part, 22 ... Hole, 23 ... Wall part, 24 ... Upper surface, 25 ... Ventilation groove, 30 ... Molded body, 38 ... Mold, 52 ... V Character-shaped cut, 53 ... hypotenuse of V-shaped cut.

Claims (3)

In a helmet comprising a shell body, an impact absorbing liner provided inside the shell body, and an interior pad that is provided inside the shock absorbing liner and contacts the head,
The impact-absorbing liner has a bottom on the surface of the interior pad that is a curved convex surface, and a hole communicating with the interior pad is provided on the bottom.
A helmet ventilation structure, wherein a wall portion is vertically and horizontally formed from the bottom portion toward a surface on the shell body side that is the curved concave surface, and a ventilation groove is provided in the wall portion.   2. The helmet ventilation structure according to claim 1, wherein the ventilation groove is provided so as to avoid a connecting portion where vertical and horizontal wall portions intersect. 2. The helmet ventilation structure according to claim 1, wherein the shock absorbing liner is formed of a resin elastic body.

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