EP0957697B1 - Procede de fabrication de casque personnalise - Google Patents

Procede de fabrication de casque personnalise Download PDF

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Publication number
EP0957697B1
EP0957697B1 EP97920788A EP97920788A EP0957697B1 EP 0957697 B1 EP0957697 B1 EP 0957697B1 EP 97920788 A EP97920788 A EP 97920788A EP 97920788 A EP97920788 A EP 97920788A EP 0957697 B1 EP0957697 B1 EP 0957697B1
Authority
EP
European Patent Office
Prior art keywords
wearer
helmet
head
personalized
eyes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97920788A
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German (de)
English (en)
French (fr)
Other versions
EP0957697A1 (fr
Inventor
Pascal Thomson-CSF S.C.P.I. BEAUDOIN
Joel Thomson-CSF S.C.P.I. BAUDOU
Alexandre Thomson-CSF S.C.P.I. BATAILLE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales Avionics SAS
Original Assignee
Thales Avionics SAS
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Filing date
Publication date
Application filed by Thales Avionics SAS filed Critical Thales Avionics SAS
Publication of EP0957697A1 publication Critical patent/EP0957697A1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42C—MANUFACTURING OR TRIMMING HEAD COVERINGS, e.g. HATS
    • A42C2/00—Manufacturing helmets by processes not otherwise provided for
    • A42C2/007—Manufacturing custom-sized helmets

Definitions

  • the present invention applies to the manufacture of any helmet to be precisely positioned on the wearer's head.
  • Viewfinder helmets are mainly used by military forces for infantrymen or pilots of airplanes and helicopters. These helmets include on the one hand the helmet proper intended for the passive protection of the helmet wearer and on the other hand a visual integrated into this helmet and intended for the presentation of information in the eyes of said wearer.
  • the bearer designates the person for which the helmet is made, even if, in certain phases of the realization described, this person is bareheaded.
  • the helmet consists of a resistant rigid protective shell with a perforation and a thicker, more flexible inner shell for comfort and impact protection. It most often includes a system of audio communication, possibly a respiratory system, and further supports the visual if it is a helmet with integrated visual.
  • the visual is an optical display device which has a video image of external reality or a synthetic image on a "combiner", that is to say on a semi-reflecting screen which allows the simultaneous vision of the real world and the image presented.
  • the image is produced by an image generator, for example a cathode ray tube, a liquid crystal display or a matrix of light emitting diodes.
  • Relay optics placed between the image generator and the combiner collimates the image to transform it into a virtual image.
  • the "combiner" is made by the visor of the helmet herself.
  • FIG. 1 represents such a helmet, with its rigid shell 10, its internal shockproof cap 12.
  • the display 14 includes an imager (here a tube projection cathode) 16, a projection visor 18 constituting the "combiner” mentioned above, and between the imager and the visor, the relay optics 20.
  • a correct vision of the image by the wearer of the helmet is not assured that if the eye is placed at a very precise position in relation to optical paths defined by the visual, therefore at a very precise position by relation to all the elements making up the visual, elements which themselves must be positioned very precisely with respect to other.
  • the difficulty lies in this rigorous positioning of the visual compared to the helmet wearer's eye.
  • the relative positioning tolerance is for example 1 millimeter and 1 degree between the optical system, the optical paths it defines, and the wearer's eye.
  • FIG. 2 shows such a helmet with adjustment means 22 with four degrees of freedom according to three translations and a site rotation.
  • Another solution is to postpone the adjustment of the helmet to the level of its internal cap.
  • the visual is then rigidly fixed to the shell and a cap internal custom jointly performs the adaptation of the helmet to the morphology of the wearer and the correct positioning of the visual in relation to the wearer's eye.
  • the helmet is then completely adapted to the morphology of the carrier and the display is correctly placed for this carrier only.
  • the difficulty lies in the realization of this personalized internal cap, this achievement should lead to the visual being always correct placed, without additional mechanical adjustment system.
  • This personalization can be done in practice by making a personalized lining that the wearer places inside a helmet standard.
  • the lining can be produced by direct molding, on the head of the wearer by injecting polyurethane foam between the wearer's head and a shape which is the inner shape of the helmet's shockproof cap, everything keeping the head and said shape in exact relative position such that the is correctly positioned in relation to the wearer's eyes. After polymerization of the foam and release from the mold, a filling is obtained which will be placed inside the helmet.
  • the exothermic thrust and chemical reaction of the foam injected depends on its density, that is to say on the ratio between the amount of material injected and the actual volume between the head and the inner shape of the shockproof cap, this volume being very difficult to measure in practice. This also leads to uncertainty about the final positioning accuracy obtained.
  • the invention aims to produce a custom helmet in a way simpler and avoiding the disadvantages of the processes as much as possible of the prior art.
  • the invention provides a method of manufacturing a helmet including a personalized internal cap ensuring positioning of the helmet on the wearer's head characterized by a reading prior to the shape of the wearer's head by a measuring device without contact, which prior reading is followed by an implementation of said cap at from this statement.
  • the prior reading is preferably done by a process of optical measurement, in particular by a laser beam scanner which revolves around from the user's head by reading the distances between this scanner and head points to get as digital data the shape of the head.
  • FIG. 3 represents a helmet on the head of its wearer 36 with its shell 30 and its standard internal cap 31, in which is placed, using positioning pins 32 and 33, a gasket composed of a foam 34 with fiocage 35 on the side of the wearer's head.
  • a gasket composed of a foam 34 with fiocage 35 on the side of the wearer's head.
  • FIG. 4 represents the preferred implementation of the invention.
  • the statement of the shape of the wearer's head is a contactless digital reading, such as a digital reading two-dimensional obtained by a 3D scanner digitizing profiles formed by a plane laser beam.
  • Such a statement of the shape of a head may consist of a scanning of laser-illuminated meridians captured by a camera in a rotary scanning head 52 rotating around an axis vertical 53 of a fixed platform 55.
  • the wearer wears for example a thin elastic cap intended for flatten the hair on the skull as the helmet would and presenting a color and surface condition suitable for the scanner.
  • the wearer is then placed in a chair whose back is tilted representative of the aircraft seat.
  • the wearer stands in a natural posture of the head by fixing his gaze horizontally while looking at his image in the semi-reflecting mirror 54 placed in front of him.
  • the stationary position of the head is maintained by a bite plate, a chin rest or ergonomic neck brace adjustable according to the six degrees of freedom and connected to the chair.
  • the chair is movable relative to the fixed platform 55, it is moved in the horizontal plane to match the top of the subject's skull with mechanical axis of rotation 53 of the scanner, then adjusted in height in order to optimize the shape survey and reduce the areas shade.
  • the complete scanning of the head can be carried out in one scanner revolution in 15 seconds.
  • the average resolution of this scan is close to 0.5 millimeter and the accuracy of about 0.1 millimeter.
  • the session ends with measurements of spatial coordinates of the eyes and possible anatomical points, by sightings of different glasses.
  • the device of FIG. 4 measures the position from the center of each eye of the wearer relative to the fixed platform 55.
  • Each of the three riflescopes 56, 57 and 58 is placed on a linear rule with digital coding, respectively 59, 60 and 61, these rules allow to measure two coordinates from a point of the carrier to digitize.
  • the system of numerical rules and glasses is beforehand harmonized in position with the scan mark of the scanner using a calibration piece.
  • the wearer maintains his gaze using the semi-reflecting mirror 54 arranged before him.
  • a telescope 56 is placed in front of the wearer's face and allows an operator to read the coordinates of the eyes of the wearer at height and in width by adjusting the position of this telescope.
  • the other two glasses 57 and 58, orthogonal to the bezel 56, are placed on either side of the carrier so that the operator measures the depth dimension on the one hand with the left eye by adjusting the position of the telescopic sight 57, and on the other hand with the right eye by adjusting the telescope 58.
  • Scanning the wearer's head is then used to make the custom trim defined above, as well as elements internal headphones such as the position of the headphones.
  • This scan can be used by a machining machine digital to make an internal mold of the filling.
  • a filling mold realization is presented on the figure 5, it comprises on the one hand a standard base 63 in which a custom internal mold 64, and on the other hand a standard external mold 65, corresponding to the internal shape of the standard shockproof cap of the helmet.
  • the internal mold has a standard internal face 67 allowing it to be positioned precisely with respect to the base 63 and a face external 66 personalized representing the shape of the wearer's head.
  • the external mold 65 fits on the base so as to obtain a space corresponding to the lining between the external mold 65 and the internal mold 64.
  • the lining is thus produced by injection through the orifice 68 when the two molds 65 and 64 are blocked on the base 63. Centering pins are formed on the lining during this molding operation by the filling of cavities 69 and 70.
  • the filling can also be made from a block of foam, by machining using a digital machine using the above digitization, then dressing with a term of comfort and finish.
  • the personalized packing is placed in a standard helmet.
  • Such a helmet manufacturing method allows the realization of a helmet with integrated visual suitable for the wearer without adding a device mechanical adjustment of the display.
  • the shape record described in the preferred implementation of the invention is clean and not very restrictive for the wearer since there is no thrust exerted on the head, as in the production of lining by direct molding on the wearer's head, immobilization being ensured painlessly with a simple bite board without taking an impression dental.
  • the necessary statement of head shape is more exactly limited to the statement of the part of the head used to define the lining customized.
  • the first step requires the wearer's presence limited to a few tens of minutes and, for more comfort, a reading device head shape can be installed, for example, in a truck for allow to carry out the readings in the workplace of the carriers of helmet.
  • the second step is carried out without the carrier, for example by factory because the helmet adjustment on the wearer's head is defined in the first stage.
  • Another advantage of the invention is the fact that the statement of form allows to determine in advance the quantity of material to be injected to make the personalized cap.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Helmets And Other Head Coverings (AREA)
EP97920788A 1996-04-26 1997-04-18 Procede de fabrication de casque personnalise Expired - Lifetime EP0957697B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9605309A FR2747895B1 (fr) 1996-04-26 1996-04-26 Procede de fabrication de casque personnalise
FR9605309 1996-04-26
PCT/FR1997/000706 WO1997040716A1 (fr) 1996-04-26 1997-04-18 Procede de fabrication de casque personnalise

Publications (2)

Publication Number Publication Date
EP0957697A1 EP0957697A1 (fr) 1999-11-24
EP0957697B1 true EP0957697B1 (fr) 2001-10-17

Family

ID=9491633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97920788A Expired - Lifetime EP0957697B1 (fr) 1996-04-26 1997-04-18 Procede de fabrication de casque personnalise

Country Status (6)

Country Link
EP (1) EP0957697B1 (xx)
AU (1) AU729446B2 (xx)
DE (1) DE69707507T2 (xx)
FR (1) FR2747895B1 (xx)
WO (1) WO1997040716A1 (xx)
ZA (1) ZA973631B (xx)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750578B1 (fr) * 1996-07-08 1998-11-06 Intertechnique Sa Procede de fabrication de coiffe personnalisee de casque
EP1180337B1 (en) * 2000-08-17 2008-05-07 Gentex Corporation Alignment tool and method for mounting visual systems to helmets
FR2848660B1 (fr) 2002-12-13 2005-02-18 Thales Sa Procede de determination de la comptabilite biomecanique d'un equipement de tete
JP4208623B2 (ja) * 2003-03-28 2009-01-14 株式会社Ｓｈｏｅｉ ヘルメットのサイズの適合する種類を選定する方法ならびにこの選定方法を用いてヘルメットのサイズを調整する方法
GB2409817B (en) * 2004-01-12 2009-02-18 Helmet Integrated Syst Ltd Headgear
FR2945620B1 (fr) * 2009-05-15 2011-07-22 Thales Sa Dispositif portable de numerisation de la surface de la tete
US10353377B2 (en) 2014-03-14 2019-07-16 Bae Systems Plc Method and apparatus for mapping a region of a body
GB201404527D0 (en) * 2014-03-14 2014-04-30 Bae Systems Plc Design method and apparatus for the manufacture of an article
JP6734690B2 (ja) * 2016-04-15 2020-08-05 株式会社Ｓｈｏｅｉ ヘルメットの被り心地の調整方法及び調整用の情報処理装置
PL3261044T3 (pl) 2016-06-21 2021-10-04 Desma Schuhmaschinen Gmbh System do indywidualnego wytwarzania produktów do noszenia lub medycznych

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT322230B (de) * 1971-07-16 1975-05-12 Smolka & Co Wiener Metall Vorrichtung zur herstellung von schutzhelmen
US3956773A (en) * 1974-04-25 1976-05-18 The Unites States Of America As Represented By The Secretary Of The Navy Custom fitted, light weight, air conditioned protective helmet
FR2466233A1 (fr) * 1979-10-03 1981-04-10 Optique Scient Coiffe et procede de fabrication d'un casque faisant application d'une telle coiffe
US4876758A (en) * 1987-03-31 1989-10-31 Amfit Inc. System and method for forming custom-made shoe inserts
IT1258742B (it) * 1992-01-08 1996-02-27 Cad Modelling Srl Apparecchiatura e procedimento per la realizzazione di modellature particolarmente per l' industria dell' abbigliamento
US5530652A (en) * 1993-08-11 1996-06-25 Levi Strauss & Co. Automatic garment inspection and measurement system
FR2715479B1 (fr) * 1994-01-25 1996-03-15 Sextant Avionique Dispositif de contrôle de réglage de position et d'orientation d'un casque par rapport à la tête d'un porteur du casque.

Also Published As

Publication number Publication date
EP0957697A1 (fr) 1999-11-24
AU2703997A (en) 1997-11-19
ZA973631B (en) 1997-11-25
DE69707507D1 (de) 2001-11-22
WO1997040716A1 (fr) 1997-11-06
FR2747895A1 (fr) 1997-10-31
AU729446B2 (en) 2001-02-01
FR2747895B1 (fr) 1998-07-10
DE69707507T2 (de) 2002-05-23

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