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Title:
A COMFORT PADDING AND A HELMET COMPRISING THE COMFORT PADDING
Document Type and Number:
WIPO Patent Application WO/2018/097785
Kind Code:
A1
Abstract:
A comfort padding, configured to be attached at an innermost surface of a helmet, which is facing a wearer's head, for providing a sliding movement in the comfort padding in response to an oblique force applied to the helmet in use is provided. The comfort padding comprises a layer of membrane material provided closer to the helmet than a layer of stretchable fab- ric or nonwoven material, and between the two layers there is a layer of open cell polymer foam, the membrane layer has a low friction surface allowing for a sliding movement between the layer of open cell polymer foam and the membrane material. A helmet comprising the comfort padding.

Inventors:
HALLANDER FREDRIK (SE)
Application Number:
PCT/SE2017/051147
Publication Date:
May 31, 2018
Filing Date:
November 20, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
POC SWEDEN AB (SE)
International Classes:
A42B3/12
Domestic Patent References:
WO2016128404A12016-08-18
WO2011087435A12011-07-21
WO2006022680A12006-03-02
Foreign References:
US20020002730A12002-01-10
EP0792592A11997-09-03
US20150264993A12015-09-24
Attorney, Agent or Firm:
NORÉNS PATENTBYRÅ AB (SE)
Download PDF:
Claims:
CLAIMS

1. A comfort padding (1), configured to be attached at an innermost surface (14) of a helmet (9), which is facing a wearer' s head, for providing a sliding movement in the comfort padding (1) in response to an oblique force ap¬ plied to the helmet in use, the comfort padding comprising a layer of membrane material (2) provided closer to the helmet than a layer of stretchable fabric or nonwoven material (3), and between the two layers there is a layer of an elastic, porous material (4), the membrane layer (2) has a low friction surface allowing for a sliding movement between the elastic, porous material (4) and the membrane material (2) .

2. The comfort padding according to claim 1, wherein the membrane layer (2) and the layer of stretchable fabric or nonwoven material (3) are interconnected along the rims (5) so as to provide a closed space (6), in between the layers (2, 3), comprising the layer of elastic, porous material (4), wherein the layer of elastic, porous mate¬ rial is freely movable inside of the closed space (6) .

3. The comfort padding according to claim 1 or 2, wherein a layer of fabric or nonwoven material (7) is attached to the layer of elastic, porous material (4) on the side facing the membrane layer (2) .

4. The comfort padding according to claim 1, 2 or 3, wherein the comfort padding comprises layers, seen from the inner side facing a wearer' s head in use, the stretchable fabric or nonwoven material (3), the layer of elastic, porous material (4), the attached fabric or nonwoven material

(7) , the membrane layer (2), and a connection material

(8) attached to the side of the membrane layer (2) facing the innermost surface (14) of the helmet.

5. The comfort padding according to claim 3, wherein the connection material (8) of the padding configured to at¬ tach to the innermost side of a helmet is loopy or rough¬ ened in order to attach to for example hook material such as Velcro.

6. The comfort padding according to any one of the preceding claims, wherein the layer of fabric or nonwoven material (3) is a wicking material.

7. The comfort padding according to any one of the preceding claims, wherein the comfort padding (1) is in the form of patches .

8. A helmet (9), comprising

- an energy absorbing layer (10), comprising at least one part, having an outer side facing away from a wearer's head and an innermost side (14) facing the wearer's head,

- at least one piece of comfort padding (1) according to any one of the previous claims, provided at the inner¬ most side (14) of the energy absorbing layer (10) .

Description:
A COMFORT PADDING AND A HELMET COMPRISING THE COMFORT PADDING

Field of invention

The present invention concerns a comfort padding and a helmet comprising the comfort padding.

Background

The understanding of how oblique impacts affects the brain of a person is increasingly growing and so also the different ways of taking care of oblique impacts towards helmets. Different solutions have been provided, such as having a sliding layer arranged between a shell and an energy absorbing layer, or between two energy absorbing layers. According to EP 2440082 an attachment device for attachment to a wearer ' s head is pro ¬ vided, which is fixed to the inside of the energy absorbing layer, and where a sliding occurs between the attachment device and the inside of the energy absorbing layer. In WO2013/10473 a bladder comprising a low friction liquid or gel is shown which is provided to manage the angular forces separately from the compressive forces. The compressive forces are to be man ¬ aged by the liner.

Summary of the invention

The aim of the present invention is to provide a functionally effective yet cost effective way of providing increased head safety for a person carrying out any type of sport or the like needing a helmet.

The solution according to the present invention is to provide a sliding movement closer to the person' s head by having the sliding movement to occur within comfort padding instead of in the helmet. Usually a helmet comprises an outer shell (although optional), an energy absorbing layer (often called a liner) and on the innermost side of the energy absorbing layer, facing the wearer, at least one comfort padding. The comfort padding may be one piece reaching to different positions inside the helmet or several patches at desired positions to add comfort for the wearer between the head and the energy absorbing layer, which usually is made of EPS or sometimes EPP, although other materials are conceivable, too. A comfort padding has an over ¬ all flat configuration in one plane. When attached in a helmet it follows the innermost surface of the helmet, which will make up a plane of sliding movement.

The sliding plane may, depending on the position in the helmet and size of the comfort padding, be almost flat to curved.

A comfort padding has usually a fabric material both at a side to be attached against the inside surface of the helmet and at a side to abut against a wearer's head. Between the fabric sides a polymer foam is provided. Comfort paddings are usually attached in a fixed yet detachable way, which may be accom ¬ plished by means of using hook and loop material, such as Velcro ® .

According to a first aspect of the present invention is a comfort padding provided configured to be attached at an in ¬ nermost surface of a helmet, which is facing a wearer's head, for providing a shearing and sliding movement in the comfort padding in response to an oblique force applied to the helmet in use. The comfort padding comprises a layer of membrane ma ¬ terial provided closer to the helmet than a layer of stretch- able fabric or nonwoven material, and between the two layers there is a layer of elastic, porous material. The membrane layer has a low friction surface allowing for a sliding movement between the layer of open cell polymer foam and the membrane material. According to an embodiment the membrane layer and the layer of stretchable fabric or nonwoven material are interconnected along the rims so as to provide a closed space, in between the layers, comprising the layer of elastic, porous material. The layer of elastic, porous material is freely movable inside of the closed space. The layer of elastic, porous material may shear during an oblique impact.

According to an embodiment a layer of fabric or nonwoven mate ¬ rial is attached to the layer of elastic, porous material on the side facing the membrane layer.

According to an embodiment the comfort padding comprises lay ¬ ers, seen from the inner side facing a wearer's head in use, the stretchable fabric or nonwoven material, the layer of elas ¬ tic, porous material, the attached fabric or nonwoven material, the membrane layer, and a connection material attached to the side of the membrane layer facing the innermost surface of the helmet .

According to an embodiment the connection material of the pad ¬ ding configured to attach to the innermost side of a helmet is loopy or roughened in order to attach to for example hook material such as Velcro.

According to an embodiment the layer of fabric or nonwoven material is a wicking material.

According to an embodiment the comfort padding is in the form of patches.

According to a second aspect of the present invention a helmet is provided, comprising - an energy absorbing layer, comprising at least one part, having an outer side facing away from a wearer's head and an innermost side facing the wearer' s head,

- at least one piece of comfort padding according to any one of the previous claims, provided at the innermost side of the energy absorbing layer.

Thus an inventive comfort padding have been provided which has superior possibilities to handle oblique impacts. Since the sliding occurs inside the comfort padding the rotational force of the oblique impact will be handled as close to the head as possible thus limiting the torque of the head. Additionally, the comfort padding will be very light weight due to the layer of elastic, porous material, which also is an important safety factor of a helmet.

Description of the drawings

The present invention will now be described in more detail under referral to the attached drawings, in which

Fig. 1 shows one embodiment of a comfort padding in cross sectional view.

Fig. 2 shows a further embodiment of a comfort padding in cross sectional view having interconnected rims.

Fig. 3 shows another embodiment of a comfort padding in cross sectional view.

Fig. 4 shows one embodiment of a comfort padding in cross sectional view.

Fig. 5 shows a cross section of an embodiment of a padding during an oblique impact.

Fig. 6 shows a comfort padding in a helmet, seen in a cross sectional view. Detailed description of embodiments of the invention

In Fig. 1 a comfort padding 1 is shown per se. It comprises a first layer 2, which is to be positioned towards a helmet, at the innermost surface of a helmet, such as an energy absorbing layer. The first layer 2 is a layer of membrane material. The membrane material has a low friction surface.

Fig. 1 also shows a second layer 3, which is to be positioned closest to a wearer's head 16. This layer 3 is a layer of fabric or nonwoven material and is stretchable. The material is preferably a material which feels nice and comfortable against the skin of the wearer. It could also have wicking properties in order to lead sweat from the wearer into the material and thereafter vaporisation of the sweat. In between the two layers 2, 3 a layer or cushion of elastic, porous material 4 is present.

The membrane layer 2 has a low friction surface and thus will allow for a sliding movement, between the layer of elastic, porous material 4 and the membrane layer 2, in response to an oblique impact. Thus the sliding movement will occur within the comfort padding 1. The layer of elastic, porous material will provide comfort to the wearer and also facilitate sweat vaporisation .

In Fig. 2 a further embodiment of the comfort padding 1 is shown in cross sectional view. In the present figure the two layers 2, 3 are interconnected along their rims 5 providing a closed space 6. The layer or cushion of elastic, porous mate ¬ rial 4 is freely movable inside of the closed space 6.

In Fig. 3 a further embodiment of the comfort padding 1 is shown in cross sectional view. A layer 7 of fabric or nonwoven material is attached to the layer of elastic, porous material 4, for example by means of laminating. Preferably, the first and second layers 2, 3 may be interconnected along its edges 5 (not shown) .

In Fig. 4 an embodiment of the comfort padding 1 comprises layers is shown. Seen from the inner side facing a wearer's head in use the comfort padding 1 comprises the stretchable fabric or nonwoven material 3, the layer of elastic, porous material 4, the attached fabric or nonwoven material 7, the membrane layer 2, and a connection material 8 attached to the side of the membrane layer 2 facing the innermost surface of the helmet. The connection material 8 of the comfort padding 1 configured to attach to the innermost side of a helmet is loopy or roughened in order to attach to for example hook material such as Velcro. This connection material 8 may be laminated on the membrane layer 2, on the side facing the helmet.

In Fig. 5 it is shown when a helmet 9 is exposed to an oblique impact and how the comfort padding 1 may move in addition to the inner sliding movements. The comfort padding 1 may roll somewhat, up to the fastening/connection 15 to an innermost side 14 of an energy absorbing layer 10 of a helmet 9. It is not a sliding movement between the comfort padding 1 and the inside 14 of the energy absorbing layer 10 since the comfort padding 1 is fastened/connected to the inside 14, for example by means of Velcro. For example, the connection 15 does not cover the full area of the comfort padding but instead only a portion in order to render partial rolling of the comfort padding possible. In case the oblique impact is stronger, the comfort padding 1 may start to be torn off from the inside 14 of the energy absorbing layer 10, see also Fig. 8. This rolling movement is possible due to the stretchable second layer 3. The membrane layer 2 material having a low friction surface may be any material having a coating of a low friction material or made of a material having low friction itself. The membrane material layer may be thin, for example a few hundredth of a millimeter or thicker, to give some stability to the comfort padding 1, for example a few tenth of a millimeter.

The layer of elastic, porous material may have a thickness of 4-10 mm. It could be an open cell foam, for example a foam of Polyethylene (PE) or similar, having a density between 5-50 kg/m 3 . Alternatively, the layer of elastic, porous material may be a fibre material, such as a wadding or non-woven felt having a three dimensional structure of fibres so that the air perme ¬ ability is high and thus the density is low. In such a way the layer of elastic, porous material may not accumulate sweat vapour but instead lead it out. The density may be between 20- 50 kg/m 3 (JIS-K-6401) and the air permeability may be between 90-150 cm 3 /cm 2 sec (JIS-L-1079) . A suggested material is a non- woven material with more or less vertically oriented fibres, i.e. radially oriented fibres when in use in the comfort pad ¬ ding in a helmet and worn by a wearer. For example the fibres may be of polyesther or a polysulfone, such as a polyether sulfone (PES) .

The sliding movement is preferably at least 5 mm, preferably at least 5-10 mm and most preferred at least 10 mm or more.

In all shown embodiments it is preferred that the second layer 3 is made of a flexible and stretchable fabric or a flexible and stretchable nonwoven material. It is preferably knitted and may comprise yarn of elastan, lycra, spandex, polyester or nylon . As the person skilled in the art understands it is possible to mix, pick and choose from the suggested materials in any way as long it is not contradicting the inventive idea of a sliding and a shearing movement within the comfort padding in response to an oblique impact.

In Fig. 6 at least one comfort padding 1 of any embodiment of the present invention is provided at the innermost surface 14 of a helmet 9. The helmet 9 comprises an energy absorbing layer 10 and preferably an outer shell 11.

The presently described embodiments are only examples and shall not be seen as limiting the scope of the invention, which is presented in the claims.