EP0702906A1 - Pair of synchronized hinges for securing a retractable visor on a helmet - Google Patents

Pair of synchronized hinges for securing a retractable visor on a helmet Download PDF

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Publication number
EP0702906A1
EP0702906A1 EP95402088A EP95402088A EP0702906A1 EP 0702906 A1 EP0702906 A1 EP 0702906A1 EP 95402088 A EP95402088 A EP 95402088A EP 95402088 A EP95402088 A EP 95402088A EP 0702906 A1 EP0702906 A1 EP 0702906A1
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EP
European Patent Office
Prior art keywords
helmet
visor
pair
articulations
crankpin
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.)
Granted
Application number
EP95402088A
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German (de)
French (fr)
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EP0702906B1 (en
Inventor
Eric Petit
Vincent Vitte
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Thales Avionics SAS
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Thales Avionics SAS
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Publication of EP0702906A1 publication Critical patent/EP0702906A1/en
Application granted granted Critical
Publication of EP0702906B1 publication Critical patent/EP0702906B1/en
Anticipated expiration legal-status Critical
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    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/18—Face protection devices
    • A42B3/22—Visors

Definitions

  • the present invention relates to an articulated attachment for a helmet visor which can be operated with one hand while allowing the visor to tilt relative to the helmet from a position folded over the face to a raised position revealing the face and vice versa according to a movement. complex starting with a translation moving the visor away from the helmet in order to free it from a possible seal or rim and continuing to the raised position by a rotation retracting the visor above the face.
  • Visor helmets are used to protect a pilot's head in the event of an impact.
  • the helmet protects the skull while the visor protects the face and is used for visual comfort in an aggressive environment: wind, dust, light, fog ... and, possibly for protection in an aggressive chemical environment.
  • the seal must be ensured between the helmet shell and the visor in the folded position. This requires the presence of a peripheral seal and imposes a front docking on the visor, causing the latter to tilt, which is not limited to a simple rotation and which can no longer be obtained by direct manipulation of the visor because such manipulation would impose on the pilot a complex movement requiring both hands.
  • helmets are equipped with a helmet viewfinder which is an optical image projection system using a semi-reflecting area of the visor in the folded position to display driving assistance symbols before the eyes of the pilot. This requires very precise adjustment and excellent reproducibility of the position of the visor with respect to the other optical elements carried by the helmet.
  • the object of the present invention is to provide an articulated fixing of a visor to a helmet which gives the visor a complex tilting movement based on translation and rotation, and which can be operated directly by the helmet wearer, with one hand , by simple rotation of a lever, without requiring the assistance of electric motors.
  • the mechanical synchronization means comprise: a cable which slides in a sheath connecting the two articulations following the contour of the shell of the helmet and which is equipped at its two ends with a rack, and two toothed pinions integral with the pivot axes and crank pins of the joints which mesh with the racks so that a rotational movement of a crank pin causes the cable to slide in its sheath and an identical rotational movement of the other crank pin.
  • the pinions and racks are then mounted in gear boxes housed at the base of each joint.
  • the handles have the shape of a shell having on its outer face depressions facilitating their gripping.
  • the helmet has a protective shell 1 enveloping the skull with the exception of the face.
  • This shell 1 is closed at the front by a fairing 2 in its lower part and by a visor 3 in its upper part.
  • the visor 3 is articulated laterally to the shell 1 of the helmet so as to be able to be lowered or raised, the operation of the visor being effected by means of a lever 4 covering each articulation.
  • the shell 1 of the helmet contains, as shown in FIG. 2, a hoop-shaped plate 5 which supports an image generating tube 6 associated with an optical image projection system 7 on a semi-reflecting area of the visor and the joints 8 for fixing the visor 3.
  • the image generator tube 6 and the associated optical system 7 are mounted on the plate 5 by means of lugs 10, 11 which fit onto tongues placed one 12 at the top of the plate 5, the other 13 on the back of the support of a joint 8.
  • the joints 8 for fixing the visor 3 to the helmet are mounted at the ends of the arch of the plate 5, at the level of the temples of the helmet wearer and joined together by a sheathed cable 9 of movement synchronization.
  • This facilitates the adjustments of the respective positions of the elements of the optical image projection system avoids the problems posed by the lack of rigidity of the shell 1 of the helmet on the stability of the adjustment of the relative positions of the visor and of the other elements of the helmet. optical image projection system and simplifies maintenance of the helmet viewfinder.
  • Each end of the arch of the plate 5 ends substantially vertically by an ear 20 pierced with a median hole 21 for a horizontal pivot axis 22 having a flattened circular head 23 extended by a rod 24.
  • the axis of pivot 22 is threaded into the hole 21 of the ear 20 from the inside. Its circular head 23 is pressed against the rear wall of the ear 20 while its rod 24 protrudes horizontally from the front wall of the ear in a gear box.
  • This toothed pinion 25 is integral in rotation with the pivot axis 22 by means of grooves of complementary profiles made on the surface of the rod 23 of the pivot axis and inside its bore. It is housed in the gearbox in the company of a rack 26 on which it meshes. The rack 26, which is moved back and forth, is attached to the rack of the other joint by means of a cable sliding in a sheath 9 connecting the gear boxes of the two joints.
  • a cover 28 of the gearbox is threaded on the pivot axis 22 to close the gearbox and secure the pinion 25 and the rack 26 in place.
  • This cover 28 has externally a tubular extension 29 serving as an articulation axis surrounded by an annular plate 30 serving as a bearing for the articulation.
  • the first and second washers 31, 33 serve as shims. They are peelable. By adjusting their individual thicknesses while keeping them a constant overall thickness, the lateral position of the attachment tab 32 of the visor relative to the plate 5 can be varied for fine transverse adjustment of the position of the visor relative to headphones which is useful for adjusting the elements of the optical image projection system.
  • the lateral attachment tab 32 of the visor is threaded onto the tubular extension 29 of the cover 28 of the gearbox surrounding the rod of the pivot axis 22 by means of a hole 40 in the form of a buttonhole whose width determines the amplitude of the travel in translation of the visor relative to the helmet. It is provided with a cam-shaped notch 41 in which slides a guide finger 42 fixed to the outer wall of the gearbox and integral with the side wall of the helmet to define the components in translation and rotation of the movement of tilting of the visor relative to the helmet.
  • This notch 41 has a part in an arc 41a defining the rotational movement making it possible to bring the visor from its retracted position to its folded position, extended by a rectilinear part 41b almost radial turned towards the outside of the arc part of circle 41a, of the same width and of the same orientation as the buttonhole, defining the translational movement allowing the visor to be brought closer to the helmet to ensure it comes into contact when it is folded down.
  • the lateral attachment tab 32 of the visor also has an ovalized hole 43 for its mechanical drive by the crankpin 34 and a flange 44 for its attachment to the visor 3. As can be seen in FIG. 2, the flange 44 is screwed to an intermediate piece 45 riveted to the visor.
  • the crank pin 34 is screwed onto the end of the rod 24 of the pivot axis by means of a screw 46 so as to be integral in rotation with the latter like the toothed pinion 25. It has a main arm 47 which ends in a drive pin 48 which is turned towards the lateral attachment tab 32 and which struggles in the ovalized hole 42 and two auxiliary arms arranged in a star, one 49 for fixing a lever 4 in the form of a shell allowing the crankpin 34 to be operated by hand, the other 50 for fixing a spring recalling the crankpin 34 in its extreme positions of travel corresponding to the folded and retracted positions of the visor 3.
  • the tension spring recalling the crank pin 34 in its extreme positions is visible in FIGS. 4 to 6. It is a tension spring 51 bearing between a lug 52 of the auxiliary arm 50 of the crank pin 34 turned towards the inside of the handle 4 and a fixed pin 53 attached to the outer wall of the gearbox.
  • the handle 4 has a shell shape adapted to the shape of the palm of the hand with depressions 54 for the tips of the fingers which makes its manipulation in blind easy.
  • FIG. 4 shows, seen from the front, the respective positions of the crankpin 34, of the lateral attachment tab 32 of the visor and of the tension spring 51 when the visor 3 is in the folded position.
  • the guide finger 42 is located at the rectilinear end of the notch 41, the operating lug 48 of the crank pin at the top of the ovalized hole 43 of the lateral attachment tab 32 and the pivot axis 22 to the far left of the buttonhole hole 40, on the side of the notch 41.
  • FIG. 5 shows, still viewed from the front, the respective positions of the crankpin 34, of the lateral attachment tab 32 and of the tension spring 51 when the visor is in a folded intermediate position but already spaced from the rim of the helmet.
  • the guide finger 42 is located at the junction of the rectilinear and circular parts of the notch 41, the actuating lug 48 of the crank pin at the base of the ovalized hole 43 of the fastening tab lateral 32 and the pivot axis 22 at the extreme right of the buttonhole hole 40 on the side opposite the notch 41.
  • FIG. 6 shows, still viewed from the front, the respective positions of the crankpin 34, the lateral attachment tab 32 and the tension spring 51 when the visor is in the retracted position above the face.
  • the guide finger 42 is located at the end of the circular part of the notch 41, the lug 48 of the crank pin remaining at the base of the ovalized hole 43 and the pivot axis 22 on the far right of the buttonhole hole 40 on the side opposite the notch 41.
  • crank pin 34 When a rotary movement is imposed manually on the handle 4, it drives the crank pin 34 and the toothed pinion 25 in rotation.
  • the crank pin 34 causes the lateral fastening tab 32 and therefore the visor 3 to topple over according to a complex movement of rotation and translation determined by the guiding of the finger 42 in the notch 41 while the toothed pinion 25 moves the rack 26 driving the cable in translation in its sheath 27.
  • the cable moves the rack of the other articulation which then rotates the toothed pinion and the crank pin of the other articulation which is then actuated in synchronism without having to use its lever .

Landscapes

  • Helmets And Other Head Coverings (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

The coupling arrangement consists of a pivot pin (22), a lateral attachment lug (32) for the visor (3), and a cam slot (41) for a sliding peg (42) fixed to the side of the helmet to guide the visor. It also has a rotary crank fixed to the pivot pin and engaging with an oval aperture in the lug to provide the latter with a rocking motion, and a handle (4) which allows the crank to be turned by hand. The synchronisation of the coupling arrangement is achieved by a cable which slides inside a sleeve (9) passing round the helmet between the two couplings and engaging with a rack (26) and pinion mechanism inside each. Each of the coupling adjustment handles is in the shape of a shell with indentations (54) for the finger tips.

Description

La présente invention concerne une fixation articulée pour visière de casque manoeuvrable d'une seule main tout en permettant un basculement de la visière par rapport au casque depuis une position rabattue sur le visage jusqu'à une position relevée découvrant le visage et inversement selon un mouvement complexe débutant par une translation éloignant la visière du casque afin de la dégager d'un éventuel joint ou rebord et se poursuivant jusqu'en position relevée par une rotation escamotant la visière au-dessus du visage.The present invention relates to an articulated attachment for a helmet visor which can be operated with one hand while allowing the visor to tilt relative to the helmet from a position folded over the face to a raised position revealing the face and vice versa according to a movement. complex starting with a translation moving the visor away from the helmet in order to free it from a possible seal or rim and continuing to the raised position by a rotation retracting the visor above the face.

Les casques à visière servent à la protection de la tête d'un pilote en cas de choc. Le casque protège le crâne tandis que la visière protège le visage et sert au confort visuel en ambiance agressive : vent, poussière, lumière, brouillard... et, éventuellement à la protection én ambiance chimique agressive. Dans ce dernier cas, I'étanchéité doit être assurée entre la coque du casque et la visière en position rabattue. Cela nécessite la présence d'un joint périphérique et impose à la visière un accostage frontal entraînant pour cette dernière un mouvement de basculement qui ne se limite pas à une simple rotation et qui ne peut plus être obtenu par une manipulation directe de la visière car une telle manipulation imposerait au pilote un mouvement complexe nécessitant les deux mains.Visor helmets are used to protect a pilot's head in the event of an impact. The helmet protects the skull while the visor protects the face and is used for visual comfort in an aggressive environment: wind, dust, light, fog ... and, possibly for protection in an aggressive chemical environment. In the latter case, the seal must be ensured between the helmet shell and the visor in the folded position. This requires the presence of a peripheral seal and imposes a front docking on the visor, causing the latter to tilt, which is not limited to a simple rotation and which can no longer be obtained by direct manipulation of the visor because such manipulation would impose on the pilot a complex movement requiring both hands.

De plus certains casques sont équipés d'un viseur de casque qui est un système optique de projection d'image utilisant une zone semi-réfléchissante de la visière en position rabattue pour afficher devant les yeux du pilote des symboles d'aide à la conduite. Cela nécessite un réglage très précis et une excellente reproductibilité de la position de la visière par rapport aux autres éléments optiques portés par le casque.In addition, some helmets are equipped with a helmet viewfinder which is an optical image projection system using a semi-reflecting area of the visor in the folded position to display driving assistance symbols before the eyes of the pilot. This requires very precise adjustment and excellent reproducibility of the position of the visor with respect to the other optical elements carried by the helmet.

Il est connu, notamment par la demande de brevet européen EP-A 88344, de réaliser des articulations donnant à la visière d'un casque un mouvement de basculement complexe débutant, en position rabattue, par une translation éloignant la visière du casque afin de la dégager d'un rebord et se poursuivant jusqu'en position relevée par une rotation escamotant la visière au-dessus du visage. Mais ces articulations nécessitent d'être actionnées par des moteurs électriques individuels. Cela les rend encombrantes et oblige à équiper le casque d'une batterie ce qui l'alourdit et complique sa maintenance.It is known, in particular from European patent application EP-A 88344, to produce articulations giving the visor of a helmet a complex tilting movement starting, in the folded position, by a translation moving the visor away from the helmet in order to free from a ledge and continuing to the raised position by a rotation retracting the visor above the face. But these joints need to be actuated by individual electric motors. This makes them bulky and obliges to equip the helmet with a battery which weighs it down and complicates its maintenance.

La présente invention a pour but une fixation articulée d'une visière sur un casque qui imprime à la visière un mouvement de basculement complexe à base de translation et de rotation, et qui soit manoeuvrable directement par le porteur du casque, d'une seule main, par simple rotation d'une manette, sans nécessiter l'assistance de moteurs électriques.The object of the present invention is to provide an articulated fixing of a visor to a helmet which gives the visor a complex tilting movement based on translation and rotation, and which can be operated directly by the helmet wearer, with one hand , by simple rotation of a lever, without requiring the assistance of electric motors.

Elle a également pour but une fixation articulée d'une visière sur un casque qui soit à la fois simple, fiable, et peu coûteuse.It also aims at an articulated fixing of a visor on a helmet which is at the same time simple, reliable, and inexpensive.

Elle a pour objet une paire d'articulations à manoeuvres synchronisées pour la fixation d'une visière escamotable sur un casque qui comportent chacune :

  • un axe de pivot pivotant autour d'un axe solidaire de la paroi latérale du casque ;
  • une patte d'attache latérale de la visière enfilée sur l'axe de pivot grâce à un trou en forme de boutonnière dont la largeur autorise, en sus d'un mouvement de rotation, un débattement de la visière en translation par rapport au casque et pourvue d'une encoche en forme de came dans laquelle coulisse un doigt solidaire de la paroi latérale du casque pour guider en translation et en rotation la visière au cours de son basculement par rapport au casque ;
  • un maneton rotatif fixé à l'axe de pivot venant en prise dans un trou ovalisé de la patte d'attache de manière à entraîner, par son mouvement de rotation avec l'axe de pivot, le basculement de ladite patte d'attache ;
  • une manette fixée audit maneton sur l'extérieur de l'articulation pour permettre sa rotation à la main ; et
  • des moyens de rappel élastique rappelant le maneton dans les positions extrêmes de sa plage de débattement en rotation ;

et qui sont couplées par des moyens mécaniques de synchronisation synchronisant les mouvements de leurs manetons.It relates to a pair of articulations with synchronized maneuvers for the fixing of a retractable visor on a helmet which each include:
  • a pivot axis pivoting about an axis integral with the side wall of the helmet;
  • a side fastening tab for the visor threaded onto the pivot axis through a hole in the shape of a buttonhole whose width allows, in addition to a rotational movement, a movement of the visor in translation relative to the helmet and provided with a cam-shaped notch in which slides a finger secured to the side wall of the helmet to guide the visor in translation and in rotation during its tilting relative to the helmet;
  • a rotary crankpin fixed to the pivot axis engaging in an ovalized hole in the attachment tab so as to cause, by its rotational movement with the pivot axis, the tilting of said attachment tab;
  • a handle fixed to said pin on the outside of the joint to allow its rotation by hand; and
  • elastic return means recalling the crankpin in the extreme positions of its range of rotation travel;

and which are coupled by mechanical synchronization means synchronizing the movements of their crankpins.

Avantageusement; les moyens mécaniques de synchronisation comportent : un câble qui coulisse dans une gaine reliant les deux articulations en suivant le contour de la coque du casque et qui est équipé à ses deux extrémités d'une crémaillère, et deux pignons dentés solidaires des axes de pivot et des manetons des articulations qui s'engrènent avec les crémaillères de manière qu'un mouvement de rotation d'un maneton entraîne un coulissement du câble dans sa gaine et un mouvement de rotation identique de l'autre maneton. Les pignons et les crémaillères sont alors montés dans des boîtes d'engrenage logées à la base de chaque articulation.Advantageously; the mechanical synchronization means comprise: a cable which slides in a sheath connecting the two articulations following the contour of the shell of the helmet and which is equipped at its two ends with a rack, and two toothed pinions integral with the pivot axes and crank pins of the joints which mesh with the racks so that a rotational movement of a crank pin causes the cable to slide in its sheath and an identical rotational movement of the other crank pin. The pinions and racks are then mounted in gear boxes housed at the base of each joint.

Avantageusement, les manettes ont la forme d'une coquille présentant sur sa face extérieure des dépressions facilitant leur préhension.Advantageously, the handles have the shape of a shell having on its outer face depressions facilitating their gripping.

D'autres caractéristiques et avantages de l'invention ressortiront de la description d'un mode de réalisation donné à titre d'exemple. Cette description sera faite ci-après en regard du dessin dans lequel :

  • une figure 1 représente un casque de pilote équipé d'une paire d'articulations conformes à l'invention ;
  • une figure 2 représente, en perspective démontée, une platine support de viseur de casque qui est destinée à être attachée à l'intérieur de la coque du casque, les articulations de fixation de la visière et un viseur de casque qui viennent se monter sur la platine ;
  • une figure 3 représente, en perspective démontée, une articulation de fixation de la visière au casque conforme à l'invention ; et
  • des figures 4, 5 et 6 représentent, vues de face, les positions respectives des pièces principales d'une articulation au cours des différentes phases du mouvement de basculement de la visière.
Other characteristics and advantages of the invention will emerge from the description of an embodiment given by way of example. This description will be made below with reference to the drawing in which:
  • FIG. 1 represents a pilot helmet equipped with a pair of articulations in accordance with the invention;
  • 2 shows, in disassembled perspective, a helmet visor support plate which is intended to be attached to the inside of the helmet shell, the visor fixing joints and a helmet visor which are mounted on the platinum;
  • FIG. 3 represents, in disassembled perspective, an articulation for fixing the visor to the helmet according to the invention; and
  • Figures 4, 5 and 6 show, front views, the respective positions of the main parts of a joint during the different phases of the tilting movement of the visor.

Comme on peut le voir sur la figure 1 le casque présente une coque 1 de protection enveloppant le crâne à l'exception du visage. Cette coque 1 est fermée à l'avant par un carénage 2 dans sa partie inférieure et par une visière 3 dans sa partie supérieure. La visière 3 est articulée latéralement à la coque 1 du casque de manière à pouvoir être abaissée ou relevée, la manoeuvre de la visière s'effectuant par l'intermédiaire d'une manette 4 coiffant chaque articulation.As can be seen in Figure 1 the helmet has a protective shell 1 enveloping the skull with the exception of the face. This shell 1 is closed at the front by a fairing 2 in its lower part and by a visor 3 in its upper part. The visor 3 is articulated laterally to the shell 1 of the helmet so as to be able to be lowered or raised, the operation of the visor being effected by means of a lever 4 covering each articulation.

La coque 1 du casque renferme, comme le montre la figure 2, une platine 5 en forme d'arceau qui supporte un tube générateur d'image 6 associé à un système optique de projection d'image 7 sur une zone semi-réfléchissante de la visière et les articulations 8 de fixation de la visière 3.The shell 1 of the helmet contains, as shown in FIG. 2, a hoop-shaped plate 5 which supports an image generating tube 6 associated with an optical image projection system 7 on a semi-reflecting area of the visor and the joints 8 for fixing the visor 3.

Le tube générateur d'image 6 et le système optique associé 7 se montent sur la platine 5 grâce à des pattes 10, 11 s'emboîtant sur des languettes placées l'une 12 au sommet de la platine 5, l'autre 13 au dos du support d'une articulation 8.The image generator tube 6 and the associated optical system 7 are mounted on the plate 5 by means of lugs 10, 11 which fit onto tongues placed one 12 at the top of the plate 5, the other 13 on the back of the support of a joint 8.

Les articulations 8 de fixation de la visière 3 au casque sont montées aux extrémités de l'arceau de la platine 5, à hauteur des tempes du porteur du casque et réunies entre elles par un câble gainé 9 de synchronisation de mouvement.The joints 8 for fixing the visor 3 to the helmet are mounted at the ends of the arch of the plate 5, at the level of the temples of the helmet wearer and joined together by a sheathed cable 9 of movement synchronization.

La fixation de la visière 3 à la coque 1 du casque par l'intermédiaire de la platine 5 et non directement permet de réunir en un ensemble à part les différents éléments du module de visualisation dont fait partie la zone semi-réfléchissante de la visière 3. Cela facilite les réglages des positionnements respectifs des éléments du système optique de projection d'image, évite les problèmes posés par le manque dé rigidité de la coque 1 du casque sur la stabilité du réglage des positions relatives de la visière et des autres éléments du système optique de projection d'image et simplifie la maintenance du viseur de casque.The attachment of the visor 3 to the shell 1 of the helmet by means of the plate 5 and not directly makes it possible to bring together in a separate set the different elements of the display module of which the semi-reflecting area of the visor 3 This facilitates the adjustments of the respective positions of the elements of the optical image projection system, avoids the problems posed by the lack of rigidity of the shell 1 of the helmet on the stability of the adjustment of the relative positions of the visor and of the other elements of the helmet. optical image projection system and simplifies maintenance of the helmet viewfinder.

Chaque extrémité de l'arceau de la platine 5 se termine sensiblement à la verticale par une oreille 20 percée d'un trou médian 21 pour un axe de pivot horizontal 22 présentant une tête circulaire aplatie 23 prolongée par une tige 24. L'axe de pivot 22 est enfilé dans le trou 21 de l'oreille 20 par l'intérieur. Sa tête circulaire 23 vient se plaquer contre la paroi arrière de l'oreille 20 tandis que sa tige 24 dépasse à l'horizontale de la paroi avant de l'oreille dans une boîte d'engrenage.Each end of the arch of the plate 5 ends substantially vertically by an ear 20 pierced with a median hole 21 for a horizontal pivot axis 22 having a flattened circular head 23 extended by a rod 24. The axis of pivot 22 is threaded into the hole 21 of the ear 20 from the inside. Its circular head 23 is pressed against the rear wall of the ear 20 while its rod 24 protrudes horizontally from the front wall of the ear in a gear box.

Sur la tige 23 de l'axe de pivot vient s'enfiler un pignon denté 25 visible sur la figure 3 . Ce pignon denté 25 est solidaire en rotation de l'axe de pivot 22 grâce à des cannelures de profils complémentaires pratiquées à la surface de la tige 23 de l'axe de pivot et à l'intérieure de son alésage .Il se loge dans la boîte à engrenage en compagnie d'une crémaillère 26 sur laquelle il s'engrène. La crémaillère 26, qui est animée d'un mouvement de va et vient, est attachée à la crémaillère de l'autre articulation au moyen d'un câble coulissant dans une gaine 9 reliant les boîtes d'engrenage des deux articulations.On the rod 23 of the pivot axis comes a threaded pinion 25 visible in FIG. 3. This toothed pinion 25 is integral in rotation with the pivot axis 22 by means of grooves of complementary profiles made on the surface of the rod 23 of the pivot axis and inside its bore. It is housed in the gearbox in the company of a rack 26 on which it meshes. The rack 26, which is moved back and forth, is attached to the rack of the other joint by means of a cable sliding in a sheath 9 connecting the gear boxes of the two joints.

Pour obtenir des mouvements de même sens des pignons dentés des deux articulations, l'une des crémaillères celle 26 montrée dans la figure 3, s'engrène à la base du pignon denté 25 tandis que l'autre crémaillère, celle non représentée, s'engrène au sommet du pignon denté.To obtain movements of the same direction of the toothed pinions of the two articulations, one of the racks that 26 shown in FIG. 3, meshes with the base of the toothed pinion 25 while the other rack, that not shown, s' meshes at the top of the toothed pinion.

Par-dessus le pignon denté 25 un couvercle 28 de boîte à engrenage vient s'enfiler sur l'axe de pivot 22 pour refermer la boîte à engrenage et assurer les maintiens en place du pignon 25 et de la crémaillère 26. Ce couvercle 28 présente extérieurement un prolongement tubulaire 29 servant d'axe d'articulation entouré d'un plateau annulaire 30 servant de portée à l'articulation.Above the toothed pinion 25 a cover 28 of the gearbox is threaded on the pivot axis 22 to close the gearbox and secure the pinion 25 and the rack 26 in place. This cover 28 has externally a tubular extension 29 serving as an articulation axis surrounded by an annular plate 30 serving as a bearing for the articulation.

Sur la partie tubulaire 29 du couvercle 28 de la boîte d'engrenage il vient tout d'abord une première rondelle 31, puis la deuxième pièce pivotante et coulissante de l'articulation qui sert de patte d'attache latérale 32 à la visière 3, une deuxième rondelle 33 et enfin un maneton 34 recouvert d'une manette 4.On the tubular part 29 of the cover 28 of the gearbox there comes first a first washer 31, then the second pivoting and sliding part of the articulation which serves as a lateral attachment tab 32 to the visor 3, a second washer 33 and finally a pin 34 covered with a lever 4.

Les première et deuxième rondelles 31, 33 servent de cales d'épaisseur. Elles sont pelables. En ajustant leurs épaisseurs individuelles tout en leur conservant une épaisseur globale constante, on peut faire varier la position latérale de la patte d'attache 32 de la visière par rapport à la platine 5 pour un réglage transversal fin de la position de la visière par rapport au casque ce qui est utile pour le réglage des éléments du système optique de projection d'image.The first and second washers 31, 33 serve as shims. They are peelable. By adjusting their individual thicknesses while keeping them a constant overall thickness, the lateral position of the attachment tab 32 of the visor relative to the plate 5 can be varied for fine transverse adjustment of the position of the visor relative to headphones which is useful for adjusting the elements of the optical image projection system.

La patte d'attache latérale 32 de la visière est enfilée sur le prolongement tubulaire 29 du couvercle 28 de la boîte d'engrenage entourant la tige de l'axe de pivot 22 grâce à un trou 40 en forme de boutonnière dont la largeur détermine l'amplitude du débattement en translation de la visière par rapport au casque. Elle est pourvue d'une encoche 41 en forme de came dans laquelle coulisse un doigt de guidage 42 fixé à la paroi extérieure de la boîte d'engrenage et solidaire de la paroi latérale du casque pour définir les composantes en translation et rotation du mouvement de basculement de la visière par rapport au casque. Cette encoche 41 présente une partie en arc de cercle 41a définissant le mouvement de rotation permettant d'amener la visière de sa position escamotée à sa position rabattue, prolongée par une partie rectiligne 41b presque radiale tournée vers l'extérieur de la partie en arc de cercle 41a, de même largeur et de même orientation que la boutonnière, définissant le mouvement de translation permettant de rapprocher la visière du casque pour assurer son accostage lorsqu'elle est rabattue.The lateral attachment tab 32 of the visor is threaded onto the tubular extension 29 of the cover 28 of the gearbox surrounding the rod of the pivot axis 22 by means of a hole 40 in the form of a buttonhole whose width determines the amplitude of the travel in translation of the visor relative to the helmet. It is provided with a cam-shaped notch 41 in which slides a guide finger 42 fixed to the outer wall of the gearbox and integral with the side wall of the helmet to define the components in translation and rotation of the movement of tilting of the visor relative to the helmet. This notch 41 has a part in an arc 41a defining the rotational movement making it possible to bring the visor from its retracted position to its folded position, extended by a rectilinear part 41b almost radial turned towards the outside of the arc part of circle 41a, of the same width and of the same orientation as the buttonhole, defining the translational movement allowing the visor to be brought closer to the helmet to ensure it comes into contact when it is folded down.

La patte d'attache latérale 32 de la visière présente en outre un trou ovalisé 43 pour son entraînement mécanique par le maneton 34 et une bride 44 pour sa fixation à la visière 3. Comme on peut le voir sur la figure 2, la bride 44 est vissée à une pièce intercalaire 45 rivetée à la visière.The lateral attachment tab 32 of the visor also has an ovalized hole 43 for its mechanical drive by the crankpin 34 and a flange 44 for its attachment to the visor 3. As can be seen in FIG. 2, the flange 44 is screwed to an intermediate piece 45 riveted to the visor.

Le maneton 34 est vissé sur l'extrémité de la tige 24 de l'axe de pivot grâce à une vis 46 de manière à être solidaire en rotation de ce dernier comme le pignon denté 25. Il possède un bras principal 47 qui se termine par un ergot 48 d'entraînement qui est tourné vers la patte d'attache latérale 32 et qui se débat dans le trou ovalisé 42 et deux bras auxiliaires disposés en étoile, l'un 49 pour la fixation d'une manette 4 en forme de coquille permettant la manoeuvre du maneton 34 à la main, l'autre 50 pour la fixation d'un ressort rappelant le maneton 34 dans ses positons extrêmes de débattement correspondant aux positions rabattue et escamotée de la visière 3.The crank pin 34 is screwed onto the end of the rod 24 of the pivot axis by means of a screw 46 so as to be integral in rotation with the latter like the toothed pinion 25. It has a main arm 47 which ends in a drive pin 48 which is turned towards the lateral attachment tab 32 and which struggles in the ovalized hole 42 and two auxiliary arms arranged in a star, one 49 for fixing a lever 4 in the form of a shell allowing the crankpin 34 to be operated by hand, the other 50 for fixing a spring recalling the crankpin 34 in its extreme positions of travel corresponding to the folded and retracted positions of the visor 3.

Le ressort de traction rappelant le maneton 34 dans ses positions extrêmes est visible sur les figures 4 à 6. C'est un ressort de traction 51 prenant appui entre un ergot 52 du bras auxiliaire 50 du maneton 34 tourné vers l'intérieur de la manette 4 et un pion fixe 53 attaché à la paroi extérieure de la boîte d'engrenage.The tension spring recalling the crank pin 34 in its extreme positions is visible in FIGS. 4 to 6. It is a tension spring 51 bearing between a lug 52 of the auxiliary arm 50 of the crank pin 34 turned towards the inside of the handle 4 and a fixed pin 53 attached to the outer wall of the gearbox.

La manette 4 a une forme de coquille adaptée à la forme de la paume de la main avec des dépressions 54 pour la pointe des doigts ce qui rend sa manipulation en aveugle aisée.The handle 4 has a shell shape adapted to the shape of the palm of the hand with depressions 54 for the tips of the fingers which makes its manipulation in blind easy.

La figure 4 montre, vues de face, les positions respectives du maneton 34, de la patte d'attache latérale 32 de la visière et du ressort de traction 51 lorsque la visière 3 est en position rabattue. Le doigt de guidage 42 se trouve à l'extrémité rectiligne de l'encoche 41, l'ergot de manoeuvre 48 du maneton au sommet du trou ovalisé 43 de la patte d'attache latérale 32 et l'axe de pivot 22 à l'extrême gauche du trou en boutonnière 40, du coté de l'encoche 41.FIG. 4 shows, seen from the front, the respective positions of the crankpin 34, of the lateral attachment tab 32 of the visor and of the tension spring 51 when the visor 3 is in the folded position. The guide finger 42 is located at the rectilinear end of the notch 41, the operating lug 48 of the crank pin at the top of the ovalized hole 43 of the lateral attachment tab 32 and the pivot axis 22 to the far left of the buttonhole hole 40, on the side of the notch 41.

La figure 5 montre, toujours vues de face, les positions respectives du maneton 34, de la patte d'attache latérale 32 et du ressort de traction 51 lorsque la visière est dans une position intermédiaire rabattue mais déjà écartée du rebord du casque. Le doigt de guidage 42 se trouve à la jonction des parties rectiligne et circulaire de l'encoche 41, l'ergot de manoeuvre 48 du maneton à la base du trou ovalisé 43 de la patte d'attache latérale 32 et l'axe de pivot 22 à l'extrême droite du trou en boutonnière 40 du coté opposé à l'encoche 41.FIG. 5 shows, still viewed from the front, the respective positions of the crankpin 34, of the lateral attachment tab 32 and of the tension spring 51 when the visor is in a folded intermediate position but already spaced from the rim of the helmet. The guide finger 42 is located at the junction of the rectilinear and circular parts of the notch 41, the actuating lug 48 of the crank pin at the base of the ovalized hole 43 of the fastening tab lateral 32 and the pivot axis 22 at the extreme right of the buttonhole hole 40 on the side opposite the notch 41.

La figure 6 montre, encore vues de face, les positions respectives du maneton 34, de la patte d'attache latérale 32 et du ressort de traction 51 lorsque la visière est en position escamotée au-dessus du visage. Le doigt de guidage 42 se trouve à l'extrémité de la partie circulaire de l'encoche 41, l'ergot de manoeuvre 48 du maneton restant à la base du trou ovalisé 43 et l'axe de pivot 22 à l'extrême droite du trou en boutonnière 40 du coté opposé à l'encoche 41.FIG. 6 shows, still viewed from the front, the respective positions of the crankpin 34, the lateral attachment tab 32 and the tension spring 51 when the visor is in the retracted position above the face. The guide finger 42 is located at the end of the circular part of the notch 41, the lug 48 of the crank pin remaining at the base of the ovalized hole 43 and the pivot axis 22 on the far right of the buttonhole hole 40 on the side opposite the notch 41.

Lorsqu'un mouvement de rotation est imposé manuellement à la manette 4 , elle entraîne le maneton 34 et le pignon denté 25 en rotation. Le maneton 34 provoque le basculement de la patte d'attache latérale 32 et donc de la visière 3 selon un mouvement complexe de rotation et de translation déterminé par le guidage du doigt 42 dans l'encoche 41 tandis que le pignon denté 25 déplace la crémaillère 26 entraînant le câble en translation dans sa gaine 27. Le câble déplace la crémaillère de l'autre articulation qui fait alors tourner le pignon denté et le maneton de l'autre articulation qui est alors actionnée en synchronisme sans avoir besoin d'utiliser sa manette.When a rotary movement is imposed manually on the handle 4, it drives the crank pin 34 and the toothed pinion 25 in rotation. The crank pin 34 causes the lateral fastening tab 32 and therefore the visor 3 to topple over according to a complex movement of rotation and translation determined by the guiding of the finger 42 in the notch 41 while the toothed pinion 25 moves the rack 26 driving the cable in translation in its sheath 27. The cable moves the rack of the other articulation which then rotates the toothed pinion and the crank pin of the other articulation which is then actuated in synchronism without having to use its lever .

Grâce à ce système d'articulations synchronisées actionnable d'une seule main, on obtient un mouvement complexe pour la visière permettant un accostage frontal de cette dernière sur le rebord du casque lorsqu'elle est rabattue sans que ces articulations présentent un encombrement notoirement plus important ou une difficulté de manoeuvre supérieure aux articulations traditionnelles n'autorisant qu'un mouvement de basculement par rotation.Thanks to this system of synchronized articulations which can be operated with one hand, a complex movement is obtained for the visor allowing it to be brought into frontal contact with the rim of the helmet when it is folded down without these articulations having a noticeably larger bulk. or a difficulty in maneuvering superior to traditional articulations allowing only a tilting movement by rotation.

Claims (5)

Paire d'articulations à manoeuvres synchronisées pour la fixation d'une visière (3) escamotable sur un casque caractérisées en ce qu'elles comportent chacune : - un axe de pivot (22) pivotant autour d'un axe solidaire de la paroi latérale du casque ; - une patte d'attache latérale (32) de la visière (3) enfilée sur l'axe de pivot (22) grâce à un trou en forme de boutonnière (40) dont la largeur autorise, en sus d'un mouvement de rotation, un débattement de la visière (3) en translation par rapport au casque (1) et pourvue d'une encoche (41) en forme dé came dans laquelle coulisse un doigt (42) solidaire de la paroi latérale du casque pour guider en translation et en rotation la visière (3) au cours de son basculement par rapport au casque ; - un maneton rotatif (34) fixé à l'axe de pivot (22) venant en prise dans un trou ovalisé (43) de la patte d'attache (32) de manière à entraîner, par son mouvement de rotation avec l'axe de pivot (22), le basculement de ladite patte d'attache (32) ; - une manette (4) fixée audit maneton (34) sur l'extérieur de l'articulation pour permettre sa rotation à la main ; et - des moyens de rappel élastique (51) rappelant le maneton (34) dans les positions extrêmes de sa plage de débattement en rotation ; et en ce qu'elles sont couplées par des moyens mécaniques de synchronisation (25,26,27) synchronisant les mouvements de leurs manetons (34).Pair of articulations with synchronized operations for fixing a retractable visor (3) on a helmet, characterized in that they each include: - a pivot axis (22) pivoting about an axis integral with the side wall of the helmet; - a side fastening tab (32) of the visor (3) threaded on the pivot axis (22) through a hole in the shape of a buttonhole (40) whose width allows, in addition to a rotational movement , a deflection of the visor (3) in translation relative to the helmet (1) and provided with a notch (41) in the shape of a cam in which a finger (42) slides secured to the side wall of the helmet to guide in translation and in rotation the visor (3) during its tilting relative to the helmet; - a rotary crankpin (34) fixed to the pivot axis (22) engaging in an ovalized hole (43) of the fastening tab (32) so as to drive, by its rotational movement with the axis pivot (22), the tilting of said attachment tab (32); - a handle (4) fixed to said pin (34) on the outside of the joint to allow its rotation by hand; and - elastic return means (51) recalling the crank pin (34) in the extreme positions of its range of rotation travel; and in that they are coupled by mechanical synchronization means (25,26,27) synchronizing the movements of their crankpins (34). Paire d'articulations selon la revendication 1, caractérisées en ce que les moyens mécaniques de synchronisation comportent : un câble qui coulisse dans une gaine (9) reliant les deux articulations en suivant le contour de la coque (1) du casque et qui est équipé à ses deux extrémités d'une crémaillère (26), et deux pignons dentés (25) solidaires des axes de pivot (22) et des manetons (34) des articulations qui s'engrènent avec les crémaillères (26) de manière qu'un mouvement de rotation d'un maneton (34) des articulations qui s'engrènent avec les crémaillères (26) de manière qu'un mouvement de rotation d'un maneton (34) provoque un coulissement du câble dans sa gaine (27) et un mouvement de rotation identique de l'autre maneton.Pair of articulations according to claim 1, characterized in that the mechanical synchronization means comprise: a cable which slides in a sheath (9) connecting the two articulations following the contour of the shell (1) of the helmet and which is equipped at its two ends of a rack (26), and two toothed pinions (25) integral with the pivot axes (22) and crank pins (34) of the joints which mesh with the racks (26) so that a rotational movement of a crankpin (34) articulations which mesh with the racks (26) so that a rotational movement of a crankpin (34) causes the cable to slide in its sheath (27) and an identical rotational movement of the another crankpin. Paire d'articulations selon la revendication 1, caractérisées en ce que lesdits pignons (25) et crémaillères (26) sont montés dans une boîte d'engrenage logée à la base de chaque articulation.Pair of joints according to claim 1, characterized in that said pinions (25) and racks (26) are mounted in a gearbox housed at the base of each joint. Paire d'articulations selon la revendication 1, caractérisées en ce que ladite manette (4) a la forme d'une coquille présentant sur sa face extérieure des dépressions pour la pointe des doigts facilitant sa préhension.Pair of joints according to claim 1, characterized in that said lever (4) has the shape of a shell having on its outer face depressions for the fingertips facilitating its gripping. Paire d'articulations selon la revendication 1, caractérisées en ce que lesdits moyens de rappel élastique rappelant le maneton (34) dans les positions extrêmes de sa plage de débattement en rotation comporte un ressort de traction (51) attaché entre un ergot (52) d'un bras auxiliaire du maneton 34) et un pion fixe (53) solidaire de la paroi latérale du casque.Pair of articulations according to claim 1, characterized in that said elastic return means recalling the crank pin (34) in the extreme positions of its range of rotation travel comprises a tension spring (51) attached between a lug (52) an auxiliary arm of the crankpin 34) and a fixed pin (53) secured to the side wall of the helmet.
EP95402088A 1994-09-20 1995-09-15 Pair of synchronized hinges for securing a retractable visor on a helmet Expired - Lifetime EP0702906B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9411176A FR2724541B1 (en) 1994-09-20 1994-09-20 PAIR OF SYNCHRONIZED MANEUVER JOINTS FOR FIXING A RETRACTABLE VISOR ON A HELMET
FR9411176 1994-09-20

Publications (2)

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EP0702906A1 true EP0702906A1 (en) 1996-03-27
EP0702906B1 EP0702906B1 (en) 1998-11-18

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EP95402088A Expired - Lifetime EP0702906B1 (en) 1994-09-20 1995-09-15 Pair of synchronized hinges for securing a retractable visor on a helmet

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US (1) US5604930A (en)
EP (1) EP0702906B1 (en)
JP (1) JPH08170212A (en)
CA (1) CA2158620A1 (en)
DE (1) DE69506067T2 (en)
FR (1) FR2724541B1 (en)
IL (1) IL115326A (en)

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FR2817713B1 (en) * 2000-12-12 2003-11-28 Thomson Csf FAST-DAY / NIGHT FOLDABLE VISOR HELMETS
JP3875650B2 (en) * 2002-07-30 2007-01-31 株式会社アライヘルメット Support structure of mouse shutter in full face helmet
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US8813270B2 (en) * 2011-07-26 2014-08-26 Vladimiro Pizzi Helmet with flush aligned shield when closed
ITVR20120022A1 (en) * 2012-02-20 2013-08-21 Agv Spa HANDLING DEVICE FOR A HELMET TO MOVE A FIRST ELEMENT OF THE HELMET COMPARED TO A SECOND HELMET ELEMENT.
US8701212B2 (en) 2012-09-26 2014-04-22 3M Innovative Properties Company Elongated guide, and visor removably mountable thereto
US9775397B2 (en) 2013-03-15 2017-10-03 3M Innovative Properties Company Elongated guide, and visor removably mountable thereto
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Publication number Priority date Publication date Assignee Title
FR2737392A1 (en) * 1995-08-01 1997-02-07 Gec Marconi Avionics Holdings APPARATUS FOR RELEASING THE VISOR OF A HELMET

Also Published As

Publication number Publication date
DE69506067D1 (en) 1998-12-24
CA2158620A1 (en) 1996-03-21
US5604930A (en) 1997-02-25
JPH08170212A (en) 1996-07-02
EP0702906B1 (en) 1998-11-18
FR2724541A1 (en) 1996-03-22
DE69506067T2 (en) 1999-06-10
IL115326A (en) 1998-06-15
FR2724541B1 (en) 1996-12-06
IL115326A0 (en) 1995-12-31

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