JP6236567B2 - Hammock for helmet - Google Patents

Description

  The present invention relates to a helmet hammock that is provided inside a helmet body and contacts a human head.

  2. Description of the Related Art Conventionally, a helmet includes a hard cap body and a wearing body made up of a hammock, a headband, a ring strap, etc. in contact with the human head. Further, in this type of helmet, an impact absorbing liner is attached to the inner surface of the cap body.

  The impact absorbing liner is made of foamed polystyrene or the like and covers most of the inner surface of the cap body. As a result, even if a helmet wearer falls or falls due to a fall, the shock absorbing liner appropriately absorbs the impact force at either side of the frontal head or the back of the head to protect the human head (See, for example, Patent Document 1).

JP-A-8-311713

  However, if an impact absorption liner is provided between the cap body and the wearing body, the air gap between the cap body and the human head becomes small, so the air permeability inside the helmet is poor, and the impact absorption liner Heat dissipation is also hindered. For this reason, there is an inconvenience that a warmth and stuffiness are generated inside the helmet and the comfort during wearing is impaired.

  On the other hand, in order to ensure air permeability and heat dissipation, it is conceivable to remove the shock absorbing liner from the inner surface of the cap body. However, when the shock absorbing liner is removed, the impact force can be reduced by the wearing body such as a hammock when a falling object collides from the position directly above the cap body, but the frontal or occipital side when the wearer falls Since the impact force received from the surface cannot be absorbed, there is a disadvantage that sufficient protection performance during a crash cannot be obtained.

  In view of the above points, an object of the present invention is to provide a helmet hammock that not only provides high comfort when a helmet is worn, but also can provide a helmet with sufficient fall protection performance.

In order to achieve such an object, the present invention provides a helmet hammock that is provided inside a helmet body of a helmet and is in contact with a human head, and includes a plurality of legs that are arranged radially, and each leg that includes a head. In a thing provided with a hammock body composed of connecting parts connected to each other at the top, an impact absorption structure part that is located between the human head and the cap body and absorbs an impact is provided on the leg part of the hammock body, and the impact The absorption structure portion includes a cylindrical portion and a plate-like base portion that connects the cylindrical portions, and the base portion has a shape extending from a side edge of the leg portion, and the cylindrical portion is It is provided in the front-end | tip of the extension direction of a base .

  According to this, since the shock can be absorbed by the shock absorbing structure provided in the hammock without attaching the shock absorbing liner to the inner surface of the cap body as in the past, the helmet is provided with sufficient fall protection performance can do. In addition, by eliminating the need for a conventional shock-absorbing liner, air gaps and heat dissipation can be obtained by securing a sufficient gap between the person's head in contact with the hammock and the cap body. High comfort can be obtained by preventing.

  In the present invention, the shock absorbing structure portion is located between the leg portions adjacent to each other. According to this, the shock absorbing structure can be provided by utilizing the space between the legs. Therefore, it is not necessary to secure a space for arranging the shock absorbing structure portion between the cap body and the leg portion, so that the structure can be simplified and manufactured at low cost.

  In the present invention, the hammock body and the shock absorbing structure are integrally formed of a synthetic resin. According to this, it is possible to prevent an increase in the number of parts of the hammock due to the provision of the shock absorbing structure, and it is possible to reduce the number of helmet assembly steps and the manufacturing cost.

Further, the cylindrical portion of the shock absorbing structure of the present invention, can be adopted with a predetermined impact absorption capacity against the impact force applied in the axial direction of the cylindrical portion.

Explanatory perspective view which shows the attachment state of a hammock as a reference example in which some structures are common with the structure of this invention . The perspective view which shows the hammock of a reference example . Developed view of the hammock of the reference example. The perspective view which shows the hammock of another reference example . Explanatory drawing which shows the principal part of the hammock of embodiment of this invention . Explanatory drawing which shows the principal part of the hammock of other embodiment of this invention .

As shown in FIG. 1, a hammock 1 of a reference example , a part of which is common to the configuration of the present invention, constitutes a helmet wearing body 3 together with a headband 2. The wearing body 3 is provided inside a cap body 4 (indicated by phantom lines in the figure) formed of a hard material.

  The hammock 1 is in contact with the human head and forms a gap between the human head and the cap body 4. The headband 2 is fixed to the human head around the human head. On the rear head side of the headband 2, size adjusting means 5 for adjusting the circumference according to the size of the human head is provided.

As shown in FIGS. 2 and 3, the hammock 1 includes a hammock body 6 and a plurality (four in the reference example ) of shock absorbing structures 7.

The hammock main body 6 includes a plurality of (four in the reference example ) leg portions 8 that extend radially from the top of the head, and a connecting portion 9 that integrally connects the legs 8 at the top of the head. As shown in FIG. 2, each leg portion 8 is provided in a shape that curves so as to correspond to the human head.

  At the lower end of each leg 8, a connecting means 10 to the inner peripheral surface of the cap body 4 is provided. The connecting means 10 includes a fixing member 11 fixed to the inner peripheral surface of the cap body 4 and a locking portion 12 that is detachably locked to the fixing member 11, and the locking portion 12 is a lower end of each leg portion 8. It is formed integrally with the part.

As shown in FIG. 3, the connecting portion 9 of the hammock body 6 is integrally provided with a plurality of (four in the reference example ) extending portions 13 extending between the adjacent leg portions 8. The shock absorbing structure 7 is integrally provided at the tip of each extending portion 13. That is, in the hammock 1 of the reference example , the leg portion 8, the connecting portion 9, the extending portion 13, and the shock absorbing structure portion 7 are integrally formed by injection molding using a synthetic resin (for example, a polyolefin-based synthetic resin) as a material. Yes.

  Since the shock absorbing structure portion 7 is provided in the extending portion 13, each shock absorbing structure portion 7 can be disposed at a desired position simply by appropriately setting the extending length of the extending portion 13.

The shock absorbing structure 7 is formed in the same shape as shown in FIGS. 2 and 3, and as shown in FIG. 3, a plurality (eight in the reference example ) of cylindrical portions 14, It is comprised by the plate-shaped base 15 which connects the bottom part of the end of the cylindrical part 14 mutually. The cylindrical portion 14 is formed in a polygonal cylindrical shape and has an ability to absorb an impact force by being crushed in the axial direction. The base 15 is formed in a thin plate shape that can be bent appropriately.

The shock absorbing structure 7 of the reference example has the following shock absorbing ability. That is, a shock absorber (having the same material and shape as the shock absorbing structure 7) subjected to high temperature treatment (exposed to + 50 ° C. for 2 hours) and low temperature treatment (exposed to −10 ° C. for 2 hours) is used as a load cell. When a flat striker having a mass of 5.0 kg and a diameter of 127 mm is dropped from a height of 0.5 m onto this shock absorber, the load is measured by a metal flat load cell. An impact load of 2.5 kN to 9.5 kN and a duration of impact force of 3 msec to 15 msec were employed.

  As shown in FIG. 1, each shock absorbing structure 7 includes a frontal protection area F on the front side of the cap body 4, a temporal protection area S on both sides of the cap body 4, and a cap body, respectively. 4 is disposed inside the occipital region protection region R on the rear surface side. As a result, a sufficient fall protection performance is exhibited in the forehead protection region F, the occipital region protection region R, and the temporal region protection region S of the cap body 4.

  In order to confirm the above-described protection performance during a fall, as shown in FIG. 1, when the helmet is provided with the hammock 1 inside the cap body 4, when the vehicle falls or falls according to “Japanese Industrial Standard T811: 2000 Annex 2” A test based on the provision of protective safety caps was conducted. As a result, in the forehead test and the occipital head test, the impact force is suppressed to 9.81 kN or less as a composite of the cap body 4, the hammock 1, and the shock absorbing structure portion 7. And it became clear that the occipital region protection region R has a high fall protection performance.

  In addition, when the test based on the prescription | regulation of "Japanese Industrial Standard T8133: 2007" was performed with respect to the temporal region protection area S, it was confirmed that the impact force was suppressed to 15.00 kN (300 G) or less. It was. As a result, it was revealed that the temporal protection area S has sufficient protection performance.

  As described above, the shock absorbing structure 7 is provided at a position corresponding to each of the protection areas F, S, and R, so that a human head can be provided without providing a shock absorbing liner that covers most of the inner surface of the cap body as in the prior art. A relatively wide gap can be secured between the cap body 4 and the cap body 4 to obtain a sufficient fall protection performance, and air permeability and heat dissipation can be obtained when the helmet is worn, so that high comfort can be obtained.

Although the cylindrical portion 14 of the shock absorbing structure 7 mentioned in Reference Examples are polygonal tubular, cylindrical portion 14 is not limited to polygonal tubular, it may be cylindrical. Moreover, the quantity and size of the cylindrical part 14 can be set as appropriate.

In the reference example, the hammock body 6 including the four leg portions 8 is shown, but the number of the leg portions 8 is not limited to this.

  Further, the shock absorbing structure 7 may be provided only in a desired protection region among the protection regions F, S, and R. That is, although not shown, the shock absorbing structure 7 may be provided only inside the frontal head protection area F and inside the back head protection area R of the cap body 4. In this case, the shock absorbing structure portion 7 in the temporal region protection area S is not necessary, and a wider gap can be formed between the human head and the cap body 4, thereby further improving the comfort during wearing. be able to.

Also, Ha Nmokku 1, the legs 8, the connecting portion 9, extending portion 13 and the shock absorbing structure 7 are integrally formed by injection molding of a synthetic resin as a material. According to this, the number of parts can be reduced and the assembly man-hour of the helmet can be reduced. On the other hand, the hammock of the present invention is not limited to this, for example, a configuration in which the hammock body and the shock absorbing structure portion are separate members, and the shock absorbing structure portion is connected to the hammock body by an appropriate connecting means or adhesive. May be adopted.

Also, as an example in which a shock absorbing structure portion 7 c Nmokku body 6, as shown in FIG. 3, has been given a hammock 1 which is disposed between the legs 8 of the shock absorbing structure 7 are adjacent to each other The hammock of the present invention is not limited to this.

For example, as shown in FIG. 4 as another reference example, a shock absorbing structure portion in which a plurality of cylindrical portions 16 are arranged on the outer surface of each leg portion 8 of the hammock body 6 (the surface facing the inner surface of the cap body). 17 may be integrally formed. According to this, since the shock absorbing structure portion 17 is located between the leg portion 8 and the cap body and a wide gap is formed in the other portion, breathability and heat dissipation can be obtained at the time of wearing and high comfort can be obtained. Can be obtained.

Next, regarding the embodiment of the present invention, only the portions different from the above-described reference example will be described. As shown in FIG. 5, the base portion 18 protruding integrally from the side edge of each leg portion 8 of the hammock body 6 is provided. The shock absorbing structure 20 was formed by providing a plurality and providing a cylindrical portion 19 on each base 18. As a result, air permeability and heat dissipation can be obtained between the human head and the cap body when worn, and the impact can be absorbed sufficiently.

Further, as shown in FIG. 6, a shock absorbing structure 22 is constituted by a plurality of shock absorbing members 21 disposed at predetermined intervals along the side edge of each leg 8 of the hammock body 6. May be. Each shock absorbing member 21 is formed with a cylindrical portion 24 provided one at a plate-like base part 2 3 each base 23 are integrally fixed to the leg 8 by a fixing member 25. According to this, although the man-hour at the time of manufacture increases compared with the shock absorption structure part 20 shown in FIG. 5, the effect equivalent to the shock absorption structure part 20 shown in FIG. 5 can be acquired.

1 ... Hammock, 4 ... cap portion, 6 ... hammock body, 20, 22 ... the shock absorbing structure, 8 ... leg, 9 ... connecting portion, 19, 24 ... cylindrical part, 18, 23 ... base portion.

Claims (4)

A hammock for a helmet that is provided inside a helmet body and touches the human head, and includes a plurality of legs arranged radially and a connecting part that connects the legs to each other at the top of the head. In what comprises
A shock absorbing structure portion that is located between the human head and the cap body and absorbs shock is provided on the leg portion of the hammock body,
The shock absorbing structure part includes a cylindrical part and a plate-like base part connecting the cylindrical parts,
The base portion has a shape extending from a side edge of the leg portion,
The helmet- shaped hammock , wherein the cylindrical portion is provided at a distal end of the base portion in the extending direction .   The helmet hammock according to claim 1, wherein the shock absorbing structure portion is located between the leg portions adjacent to each other. The helmet hammock according to claim 1 or 2, wherein the hammock body and the shock absorbing structure are integrally formed of a synthetic resin. The cylindrical portion of the shock absorbing structure section, any one of claims 1 to 3, characterized in that it has a predetermined impact absorption capacity against the impact force applied in the axial direction of the cylindrical portion Hammock for helmets.