JP2022086891A - Helmet - Google Patents

Abstract

To provide a helmet having an interior body whose weight is reduced while suppressing reduction in a wearing feeling.SOLUTION: A helmet comprises a shell 1 for covering a human head and an interior body 2 provided between the shell 1 and the human head. The interior body 2 comprises a plurality of legs 5 extending downward from its head top part side along an inner surface of the shell 1. The legs 5 are formed in a belt-like shape and have a thin wall part 15 and thick wall parts 13, 14 disposed along their longer direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a helmet.

The helmet is composed of a hard shell and an interior body provided inside the shell. The interior is generally equipped with a shock absorbing liner, a hammock, a headband, a chin strap and the like.

The shock absorbing liner is formed of Styrofoam and covers most of the inner surface of the cap body. As a result, even if the wearer falls or falls due to a fall, the impact absorbing liner appropriately absorbs the impact force from either the frontal region or the occipital region to protect the human head. Can be done.

Further, in recent years, instead of the styrofoam shock absorbing liner, there is also known that the interior body is provided with a shock absorbing portion that imparts shock absorbing performance (see, for example, Patent Document 1). According to this, as compared with the interior body using the styrofoam shock absorbing liner, it is possible to provide a large amount of breathable space, so that the air permeability and heat dissipation inside the shell body can be improved.

Japanese Unexamined Patent Publication No. 2020-6835

However, the conventional helmet has a relatively complicated structure that imparts shock absorbing ability, and therefore has a large weight. For this reason, the load of the helmet becomes a burden on the wearer, and there is an inconvenience that the wearing feeling is deteriorated.

In view of the above points, it is an object of the present invention to provide a helmet having a lightweight interior while suppressing a decrease in wearing comfort.

In order to achieve such an object, the present invention relates to a helmet including a shell body covering a human head and an interior body provided between the shell body and the human head, wherein the interior body is an inner surface of the shell body. A plurality of legs extending downward from the crown side are provided, and the legs are formed in a band shape, and thin-walled portions and thick-walled portions are arranged along the longitudinal direction thereof. It is a feature.

According to the present invention, when the leg portion is curved along the human head, a portion having a partially different curvature is generated depending on the thin-walled portion and the thick-walled portion provided in the band-shaped leg portion. As a result, in the leg part, there is a part that touches the human head and a part that does not touch the human head, or a part that strongly hits the human head and a part that hits the human head weakly, as compared with the case where the leg part linearly touches the human head. Therefore, the feeling of wearing (especially the feeling when the legs come into contact with the human head) is improved.

By the way, as a weight reduction of the interior body, it is conceivable to reduce the wall thickness of the legs, but it is also conceivable to reduce the width dimension of the legs. By reducing the wall thickness of the legs, the flexibility of the legs is increased, and it is possible to prevent the wearing feeling from being lowered due to the hardness. On the other hand, if the width dimension of the leg is reduced, the leg hits the human head linearly, and the load of the helmet itself is concentrated to reduce the wearing feeling (especially the feeling when the leg touches the human head). There is a risk of doing so.

At this time, in the present invention, the thin portion and the thick portion can suppress the deterioration of the wearing feeling. Therefore, according to the present invention, it is possible to provide a helmet having a lightweight interior while suppressing a decrease in wearing feeling.

The legs in the present invention are preferably made of synthetic resin formed by injection molding. When forming a band-shaped leg by injection molding of synthetic resin, a mold having a relatively narrow and long inside is used as a mold. When the molten resin flows inside such a narrow and long mold, molding defects due to flow resistance and the like are likely to occur. However, in the present invention, the molded portion of the thick portion becomes a molten resin pool and causes molding defects. Can be prevented.

Explanatory drawing of the helmet which is an embodiment of this invention. A perspective view showing the unfolded hammock. Explanatory side view of the legs. Explanatory cross-sectional view of the connecting part connected to the shell. Explanatory plan view of the connecting part. Explanatory perspective view showing the regulation part. Explanatory drawing which shows the action of the regulation part.

An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the helmet of the present embodiment includes a shell 1 formed in a dome shape by a hard material. A hammock 2 is provided inside the shell 1. The hammock 2 constitutes an interior body. In addition to the hammock 2, the interior body includes a headband 3 and a chin strap (not shown).

The hammock 2 is formed by injection molding using a synthetic resin (for example, low density polyethylene or the like) as a material. As shown in FIG. 2, the hammock 2 is adjacent to each other with the parietal annular portion 4, the plurality of (four in the present embodiment) leg portions 5, and the regulating portion 6 connected to the parietal annular portion 4. It is provided with a shock absorbing portion 7 provided between the leg portions 5.

Further, a headband connecting piece 8 for connecting the headband 3 is provided on one side edge (front side edge) of the leg portion 5, and a chin strap (not shown) is connected to the other side edge (rear side edge) of the leg portion 5. A chin strap connecting piece 9 is provided.

The parietal annular portion 4 is formed in a substantially elliptical shape that is long in the anteroposterior direction. An overhanging portion 10 is provided inside the crown annular portion 4. The overhanging portion 10 expands the contact range of the crown annular portion 4 with the human head to improve the wearing feeling. In the present embodiment, a punch hole 11 is formed along the shape of the overhanging portion 10 in order to reduce the weight.

Each leg 5 has a width dimension of 5.0 to 8.0 mm and a thickness dimension of 1.5 to 2.0 mm and is formed in a band shape, and the upper end thereof is connected to the parietal annular portion 4. A connecting portion 12 is provided at the lower end (tip) of each leg portion 5.

Further, a plurality of (two in this embodiment) convex portions 13 and 14 are formed on each leg portion 5, respectively. In the leg portion 5, the convex portions 13 and 14 are thick-walled portions, and the other portions other than the convex portions 13 and 14 and the connecting portion 12 are thin-walled portions 15.

The thin-walled portion 15 has high flexibility, and the convex portions 13 and 14 rise about 2.5 mm to 15 mm from the surface of the leg and have a height of 1.5 times or more that of the thin-walled portion, so that the flexibility is low. Therefore, when the leg portion 5 is curved along the human head, as shown in FIG. 3, the curvature is partially different from the portion in contact with the human head and the portion not in contact with the human head (or the portion strongly hitting the human head). The part that hits weakly) occurs.

When the leg 5 comes into contact with the human head, the hammock 2 can be made lighter if the width of the leg 5 is narrower than that wide, but on the other hand, the narrow leg 5 abuts on the human head. Then, the load of the shell 1 is continuously applied to the human head (for example, a feeling of biting into the skin is generated), and the wearing feeling is deteriorated.

At this time, since the thin-walled portion 15 having high flexibility and the convex portions 13 and 14 having low flexibility are formed on the leg portion 5, the leg portion 5 intermittently contacts the human head, and the shell body 1 As compared with the case where the load of the above is continuously applied to the human head, the feeling of biting into the skin is reduced, so that the deterioration of the wearing feeling is suppressed.

Further, the hammock 2 is formed by injection molding using a synthetic resin material. In this injection molding, the portion corresponding to the leg portion 5 of the mold is relatively narrow and long. When the molten resin flows inside such a narrow and long mold, molding defects are likely to occur due to flow resistance and the like, but the portions corresponding to the convex portions 13 and 14 (thick portion) of the mold are the molten resin pools. Become. Therefore, the distance of the relatively narrow portion corresponding to the leg portion 5 of the mold is substantially shortened, and the occurrence of molding defects can be prevented.

Further, the convex portions 13 and 14 of the leg portion 5 form a gap between the leg portion 5 and the shell 1. Then, among the plurality of convex portions 13 and 14, the convex portion 13 formed at the position closest to the connecting portion 12 functions as a finger hook portion.

A stud-shaped portion 16 (locking portion) for locking the connecting portion 12 when connecting the leg portions 5 is provided on the inner surface of the shell body 1. As shown in FIG. 4, the stud-shaped portion 16 includes a stud shaft 16a protruding from the inner surface of the shell 1 and a disk-shaped stud head 16b whose diameter is expanded at the top of the stud shaft 16a.

As shown in FIGS. 2 and 5, the connecting portion 12 has a large-diameter opening 12a having a size that allows the stud-shaped portion 16 to penetrate, and an outer diameter of the stud shaft 16a that the stud-shaped portion 16 cannot penetrate. A small diameter opening 12b having a size substantially corresponding to the above is formed adjacently and continuously. The small-diameter opening 12b is formed at a position below (the tip end side of the leg 5) with respect to the large-diameter opening 12a.

When connecting the leg portion 5 to the shell body 1, the rivet head 16b of the stud-shaped portion 16 is passed through the large-diameter opening 12a of the connecting portion 12, and then the connecting portion 12 is connected to the shell body along the inner surface of the shell body 1. The stud shaft 16a is fitted into the small diameter opening 12b by sliding it toward the crown of 1.

When the leg portion 5 is removed from the shell body 1, the connecting portion 12 is slid along the inner surface of the shell body 1 toward the lower edge of the shell body 1, and the rivet shaft 16a of the stud-shaped portion 16 is relatively opened with a small diameter. It is moved from the portion 12b to the large diameter opening 12a.

At this time, by hooking a finger on the convex portion 13 (finger hook portion) of the leg portion 5 shown in FIG. 3, the sliding operation of the connecting portion 12 can be reliably performed, and the stud shaft 16a is firmly attached to the small diameter opening portion 12b. The engagement between the stud shaft 16a and the small-diameter opening 12b can be smoothly released even if the stud shaft 16a is fitted in the stud shaft 16a.

Then, the leg portion 5 can be removed from the shell body 1 by pulling out the rivet head 16b of the stud-shaped portion 16 that has moved to the large-diameter opening 12a from the large-diameter opening 12a.

As shown in FIG. 5, by providing a guide mark 17 (display portion) indicating the slide direction at the time of removal on the convex portion 13 (finger hook portion), the slide operation direction at the time of removal can be easily visually recognized. Not only that, but also the position of the convex portion 13 (finger hooking portion) on which the finger is hung can be easily determined.

In the present embodiment, as shown in FIG. 2, since the headband connecting piece 8 and the chin strap connecting piece 9 are provided on both sides of the leg portion 5, these can also be used as finger hook pieces. It is possible. That is, by putting a finger on the headband connecting piece 8 and the jawstring connecting piece 9 and sliding the connecting portion 12 along the inner surface of the shell 1 toward the lower edge of the shell 1, the shell 1 can be slid from the shell 1. The legs 5 can be easily removed.

Next, the shock absorbing unit 7 will be described. The shock absorbing portions 7 are provided at four locations, front, rear, and left and right. Of these, the left and right shock absorbing sections 7 are connected to the regulating section 6.

As shown in FIG. 2, a pair of regulating portions 6 are provided at positions slightly forward from the crown and offset to the left and right from the crown, and as shown in FIG. 6, the regulating portion main body 61 and the regulating portion main body 61 are provided. It is provided with a regulatory section support section 62 that supports it. The regulation portion support portion 62 is integrally provided with the parietal annular portion 4. The regulating portion supporting portion 62 supports the left and right shock absorbing portions 7 via the extending portion 63.

The restricting unit main body 61 is formed in a honeycomb shape in which a plurality of hexagonal cylindrical bodies 61a are assembled. Since the tubular body 61a has a hexagonal tubular shape, it is possible to form a honeycomb-shaped restricting portion main body 61 that shares a peripheral wall between adjacent tubular bodies 61a.

Since the regulating portion main body 61 has a structure having a plurality of tubular bodies 61a, the buckling strength can be gradually increased from the peripheral wall side to the inward side of the regulating portion main body 61.

That is, as shown in an exaggerated manner for convenience of explanation in FIG. 7, when an impact load is applied to the crown of the shell 1, the top of the shell 1 is recessed and deformed, and the distance between the inner surface of the shell 1 and the human head is reduced. It gets smaller. Along with this, the restricting portion main body 61 to which the shell body 1 is in pressure contact causes buckling deformation in a part of the peripheral corner portion of the upper end portion thereof. On the other hand, since the approach of the shell 1 to the human head is restricted with almost no buckling deformation occurring in the other portion of the regulating portion main body 61, the contact of the shell 1 with the human head is prevented.

As described above, since the regulating portion main body 61 has an effect of preventing the shell body 1 from coming into contact with the human head, the burden on the leg portion 5 of the hammock 2 can be extremely reduced. Therefore, since the leg portion 5 can be made relatively thin or relatively thin, it is possible to reduce the cost by reducing the amount of the synthetic resin material and to reduce the weight of the hammock 2.

Further, as shown in FIG. 6, the regulating portion support portion 62 is formed in a plate shape and closes the bottom portion of the regulating portion main body 61. For example, the tubular body 61a of the regulating portion main body 61 directly contacts the human head. By not doing so, the wearing feeling is prevented from being deteriorated.

According to the above configuration, the regulating unit 6 may have a wall thickness of the peripheral wall of each cylindrical body 61a constituting the regulating unit main body 61, and the number of tubular bodies 61a (the number of tubular bodies of the regulating unit in the present invention may be one. By appropriately setting the height of the tubular body 61a and the diameter of the tubular portion 61a, the crushing speed and the crushing shape due to the pressure contact received from the shell 1 can be easily adjusted.

1 ... shell body, 2 ... hammock (interior body), 3 ... headband (interior body), 4 ... crown ring part, 5 ... leg part, 6 ... regulation part, 7 ... shock absorbing part, 8 ... headband connecting piece , 9 ... Jawstring connecting piece, 10 ... Overhanging part, 11 ... Drilling hole, 12 ... Connecting part, 13, 14 ... Convex part (thick part), 15 ... Thin wall part, 13 ... Convex part (finger hook part), 16 ... Tack-shaped part (locking part), 16a ... Tack shaft, 16b ... Tack head, 12a ... Large diameter opening, 12b ... Small diameter opening, 17 ... Guide mark (display part), 61 ... Regulatory part body, 62 ... Regulatory part support part, 63 ... Extension part, 61a ... Cylindrical body.

Claims (2)

In a helmet including a shell covering the human head and an interior body provided between the shell and the human head.
The interior body comprises a plurality of legs extending downward from the crown side along the inner surface of the shell body.
The helmet is characterized in that the legs are formed in a band shape, and a thin-walled portion and a thick-walled portion are arranged along the longitudinal direction thereof. The helmet according to claim 1, wherein the legs are made of a synthetic resin formed by injection molding.

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