EP0558427B1 - Safety helmet with adjustable headband - Google Patents

Safety helmet with adjustable headband Download PDF

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Publication number
EP0558427B1
EP0558427B1 EP93420075A EP93420075A EP0558427B1 EP 0558427 B1 EP0558427 B1 EP 0558427B1 EP 93420075 A EP93420075 A EP 93420075A EP 93420075 A EP93420075 A EP 93420075A EP 0558427 B1 EP0558427 B1 EP 0558427B1
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EP
European Patent Office
Prior art keywords
crown
head
band
pinion
ring
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
EP93420075A
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German (de)
French (fr)
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EP0558427A1 (en
Inventor
Jean Marc Hede
Alain Maurice
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.)
Zedel SAS
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Zedel SAS
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Publication date
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Publication of EP0558427A1 publication Critical patent/EP0558427A1/en
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Publication of EP0558427B1 publication Critical patent/EP0558427B1/en
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Expired - Lifetime legal-status Critical Current

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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
    • A42B3/10—Linings
    • A42B3/14—Suspension devices
    • A42B3/145—Size adjustment devices

Definitions

  • the conventional adjustment means of the head circumference make use of a loop fixed to one of the ends of the band or strap, and intended to cooperate with the other free end.
  • the buckle is inside the cap and the adjustment of the head circumference requires the removal of the helmet, and the intervention of both hands. Several operations are generally necessary before finding the correct adjustment.
  • Another drawback of the adjustment loop results from the decentering effect of the head circumference with respect to the median axis of the cap, generated during the variation of the useful length of the annular band.
  • the object of the invention is to improve the adjustment of the holding device when the helmet is mounted on the head of the user.
  • the centering of the head relative to the vertical median axis of the helmet is preserved, regardless of the size of the user's head, thanks to the structure of the double rack, and the lateral positioning of the adjustment mechanism on the one side of the cap.
  • the holding device further comprises a neck restraint with retaining strap having a fixed end, and an opposite end equipped with a third rack cooperating with a pinion of a second adjustment mechanism associated with a second operating member.
  • the first and second adjustment mechanisms are arranged in a first and second spaces on the two lateral ribs opposite in the vicinity of the median zone of the cap.
  • a safety helmet 10 comprises a cap 12 made of material resistant to mechanical shock, and delimiting an internal volume 14 equipped with a cap 16, and a holding device 17 adaptable to the head of the user.
  • the cover 16 is formed by a cross of two straps 18, 20, sewn together in the central intersection zone 21, and attached by their ends to four attachment points 22, 24, 26, 28, staggered at predetermined intervals along the edge 30 of the cap 12.
  • the cap 16 envelops the top of the head, and is separated from the internal wall of the cap 12 by an isolation gap (not shown) avoiding any transmission of mechanical stresses to the head during an external shock absorbed by the cap 12.
  • the device 17 for holding the helmet 10 includes an internal headband 32 intended to enclose the periphery of the user's head, and a neckband 34 with a retaining strap mounted projecting towards the rear part 36 of the helmet 10.
  • the head circumference 32 is produced from a flexible strip shaped according to a closed ring, arranged back from the edge 30 by conforming to the internal configuration of the base of the cap 12.
  • the toothed pinion 40 is part integral with a first maneuvering ring 46 integral with an axis 48 rotatably mounted in an orifice 50 of a first fixed flange 52.
  • the first flange 52 is separated from the internal wall of the cap 12 by a first lateral space 54 for housing the first adjustment mechanism 38.
  • the flange 52 is secured to the internal wall of the cap 12 at a first attachment point 56, and advantageously comes from molding with the cap 12, made of plastic material.
  • the axis 48 extends substantially perpendicularly to the wall of the cap 12, and the ring 46 and pinion 40 assembly is mounted coaxially on the axis 48.
  • the two flat and narrowed ends 43, 45 of the head circumference 32 are arranged in song in the same plane perpendicular to the axis 48 of the operating ring 46, causing the two racks 42, 44 to face each other with the pinion interposed reverser 40.
  • a guide cage 58 is mounted coaxially on the axis 48 to maintain the positioning of the two racks 42, 44 on the teeth of the pinion 40.
  • the association of the pinion 40 with the two racks 42, 44 is located in the same plane interposed between the operating ring 46 and the guide cage 58.
  • the teeth of the first rack 42 are oriented towards the base of the cap 12, and forms part of the end 43 of the rear part of the head circumference 32.
  • the teeth of the second rack 44 are oriented towards the inside of the helmet 10, and form part of the other end 45 associated with the front part of the head circumference 32.
  • the width of each end 43, 45 is substantially identical, and is less than half the total width of the strip.
  • the interval between the two racks 42, 44 corresponds substantially to the outside diameter of the pinion 40.
  • the front part of the headband 32 is equipped with a flexible fastener 60 provided with two oblong and parallel slots 62, 64, one of which 62 can be clipped onto an anchoring stud 66 fixed to the wall internal of the cap 12.
  • Another elastic fastener (not shown) of identical structure is arranged opposite the fastener 60, on the rear part of the head circumference 32.
  • the first adjustment mechanism 38 and the two ends 43, 45 of the head circumference 32 are located on one of the lateral sides of the cap 12, preferably in the middle zone between the two opposite fasteners 60.
  • the operating ring 46 protrudes slightly from the edge 30 of the cap 12 to facilitate gripping when adjusting the head circumference 32.
  • the operation of the first mechanism 38 for adjusting the head circumference 32 is as follows:
  • the adjustment of the head circumference 32 can be carried out with one hand by the user, by rotating the operating ring 46 in a determined direction.
  • the pinion 40 transmits the rotational movement of the ring 46 to the two racks 42, 44, causing a sliding movement in opposite directions of the corresponding ends 43, 45 of the head circumference 32. This results in a reduction or an enlargement of the perimeter of the strip as a function of the direction of actuation of the rotary ring 46.
  • the races of the two ends 43, 45 of the head circumference 32 are identical, being determined by the radius of the reversing pinion 40 transforming the rotational movement of the ring 46 into sliding movement.
  • the presence of the reversing pinion 40 associated with the double rack 42, 44 makes it possible to keep the centering of the anterior and posterior parts of the strip, regardless of the size of the head circumference 32.
  • the elasticity of the two fasteners 60 follows the movement of approach of the front and rear parts of the band when adjusting the ring 46, while maintaining the head circumference at a predetermined level, slightly set back from the edge 30 of the cap 12.
  • the slot 62 cooperates with the anchoring pad 66.
  • the head circumference 32 can be brought closer to the edge 30 by using the other adjacent slot 64.
  • One of the ends (on the right in FIG. 1) of the strap of the neckband 34 is fixed, being secured for example to the first flange 52.
  • the opposite end 68 (the one on the left in FIG. 1) of the greenhouse -nuque 34 is equipped with a third rack 70 cooperating with a pinion 72 with a second adjustment mechanism 74, shown in detail in FIGS. 4 and 6.
  • the second mechanism 74 is housed in a second space 76 delimited by a second flange 78, which is secured to the internal wall of the cap 12 at a second fixing point 80.
  • the pinion 72 is mounted coaxially on an axis 82 of a second operating ring 84.
  • the axis 82 is introduced with a slight clearance in an orifice 86 of the second flange 78, and is substantially in alignment with the other axis 48 of the first adjustment mechanism 38.
  • a guide piece 88 secured to the head circumference 32 is housed in the second space 76 in contact with the flange 78, and ensures the coplanar positioning of the third rack 70 relative to the pinion 72.
  • the rack 70 and pinion 72 assembly is disposed in a plane perpendicular to the axis 82, being inserted between the guide piece 88 and the second operating ring 84.
  • Rotating the second operating ring 84 clockwise causes the end 68 to slide to the right, corresponding to an enlargement of the useful length of the neckband 34. To ensure progressive tightening of the neckband 34 during use of the helmet 10, it suffices to turn the second ring 84 anticlockwise.
  • the two adjustments of the headband 32 and the neckband 34 are carried out in the mounted position of the helmet 10 and allow a perfect adjustment to be obtained.
  • the two adjustment mechanisms 38, 74 are arranged on the two opposite sides in the middle zone of the cap 12.
  • the adjustment of the head circumference 32 is operated by the left hand, and that of the neckband 34 by the right hand of the user. It is not necessary to remove the helmet 10 to make these adjustments, and the centering of the head circumference 32 is kept in the internal volume 14 of the cap 12.
  • the racks 42, 44, 70 may be separate parts attached to the corresponding ends 43, 45, 68 of the headband 32, and of the neckband 34.
  • the racks 42, 44, 70 can be produced directly by overmolding the straps.
  • the double rack system 42, 44 and reversing pinion 40 of the first mechanism 38 by two independent adjustment devices associated with the part anterior and at the posterior part of the head circumference 32, each of the devices comprising a pinion and a simple rack.
  • the cap 12 of the helmet can be made of plastic or metallic material.
  • the fastener 60 comprises a first flexible part 93 of narrowed section, and a second enlarged part provided with two holes 90, 91 of which one of your choice is clipped onto an anchoring stud 94 of the cap as a function of the desired height of the head circumference 32.
  • the operating ring 46 of the mechanism 138 includes a peripheral portion 140 for gripping joined to an intermediate portion 142 for supporting the pinion 40 by elastic ribs 144.
  • the gripping portion 140 is equipped on its internal surface with an annular notch 146 intended to cooperate with a notched stop 148 secured to the guide 150 for housing the two ends 43, 45 of the head circumference 32.
  • the intermediate portion 142 is provided with several radial teeth 152 housed with play in notches 154 conjugate for driving the gripping portion 140.
  • the mechanism 138 is in a rest position, and the elasticity of the ribs 144 urges the gear of the notch 146 of the ring 46 with the notches of the fixed abutment 148. Any forced rotation of the ring 46 around the axis 48 is made impossible by the locking effect of the notch 146 by the stop 148.
  • the pinion 40 remains immobilized, as well as the two racks 42, 44 of the head circumference 32.

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  • Helmets And Other Head Coverings (AREA)

Description

L'invention est relative à un casque de sécurité à calotte en matériau résistant à des chocs mécaniques, renfermant une coiffe séparée du sommet de la calotte par un intervalle d'isolement, un dispositif de maintien ayant un tour de tête à bande souple annulaire agencée en retrait du bord de la calotte pour enserrer le pourtour de la tête de l'utilisateur, et des moyens de réglage de la longueur du tour de tête comprenant :

  • un premier mécanisme à pignon inverseur de commande coopérant simultanément avec une première crémaillère et une deuxième crémaillère disposées respectivement aux deux extrémités opposées de la bande, la denture des deux crémaillères étant identique,
  • un premier organe de manoeuvre accessible depuis l'extérieur et autorisant la préhension en position montée du casque sur la tête de l'utilisateur, ledit organe de manoeuvre se trouvant en liaison mécanique avec le pignon inverseur, et étant formé par une bague rotative comprenant un axe sur lequel est monté le pignon inverseur, lequel est agencé pour transformer le mouvement de rotation de la bague en deux mouvements de coulissement inverse des deux crémaillères engendrant une augmentation ou une diminution de la longueur du tour de tête selon le sens de rotation de la bague
The invention relates to a safety helmet with a cap made of material resistant to mechanical shock, containing a cap separated from the top of the cap by an isolation interval, a holding device having a headband with an annular flexible band arranged set back from the edge of the cap to enclose the periphery of the user's head, and means for adjusting the length of the head circumference comprising:
  • a first control reversing pinion mechanism cooperating simultaneously with a first rack and a second rack disposed respectively at the two opposite ends of the strip, the teeth of the two racks being identical,
  • a first operating member accessible from the outside and authorizing gripping in the mounted position of the helmet on the user's head, said operating member being in mechanical connection with the reversing pinion, and being formed by a rotating ring comprising a axis on which the reversing pinion is mounted, which is arranged to transform the rotational movement of the ring into two reverse sliding movements of the two racks generating an increase or a decrease in the length of the head circumference according to the direction of rotation of the Ring

Les moyens de réglage classiques du tour de tête font usage d'une boucle fixée à l'une des extrémités de la bande ou sangle, et destinée à coopérer avec l'autre extrémité libre. La boucle se trouve à l'intérieur de la calotte et le réglage du tour de tête nécessite l'enlèvement du casque, et l'intervention des deux mains. Plusieurs opérations sont généralement nécessaires avant de trouver l'ajustage correct. Un autre inconvénient de la boucle de réglage résulte de l'effet de décentrage du tour de tête par rapport à l'axe médian de la calotte, engendré lors de la variation de la longueur utile de la bande annulaire. Ces inconvénients vont au détriment de la rapidité d'ajustage, et du confort d'utilisation.The conventional adjustment means of the head circumference make use of a loop fixed to one of the ends of the band or strap, and intended to cooperate with the other free end. The buckle is inside the cap and the adjustment of the head circumference requires the removal of the helmet, and the intervention of both hands. Several operations are generally necessary before finding the correct adjustment. Another drawback of the adjustment loop results from the decentering effect of the head circumference with respect to the median axis of the cap, generated during the variation of the useful length of the annular band. These disadvantages go to the detriment of the speed of adjustment, and the comfort of use.

Le réglage d'un tour de tête au moyen d'un mécanisme à pignon inverseur et double crémaillère est déjà connu des documents US - A 3329 968 et US - A 4 888 831. Ces documents constituent l'état de la technique le plus proche Le mécanisme se trouve toutefois à l'arrière de la calotte, entraînant l'engagement permanent de la tête contre la partie antérieure de la calotte. Le centrage axial de la tête par rapport à l'axe médian vertical du casque n'est pas assuré.The adjustment of a head circumference by means of a reversing pinion mechanism and double rack is already known from the documents US - A 3329 968 and US - A 4 888 831. These documents constitute the closest state of the art The mechanism is however located at the rear of the cap, causing the permanent engagement of the head against the anterior part of the cap. The axial centering of the head relative to the vertical median axis of the helmet is not ensured.

L'objet de l'invention consiste à améliorer l'ajustage du dispositif de maintien lorsque le casque est monté sur la tête de l'utilisateur.The object of the invention is to improve the adjustment of the holding device when the helmet is mounted on the head of the user.

Cet objet est atteint selon les caracteristiques de la partie caractérisante de la revendication 1.This object is achieved according to the characteristics of the characterizing part of claim 1.

Le centrage de la tête par rapport à l'axe médian vertical du casque est conservé, indépendamment de la dimension de la tête de l'utilisateur, grâce à la structure de la double crémaillère, et du positionnement latéral du mécanisme de réglage sur l'un des côtés de la calotte.The centering of the head relative to the vertical median axis of the helmet is preserved, regardless of the size of the user's head, thanks to the structure of the double rack, and the lateral positioning of the adjustment mechanism on the one side of the cap.

Le dispositif de maintien comporte de plus un serre-nuque à sangle de retenue ayant une extrémité fixe, et une extrémité opposée équipée d'une troisième crémaillère coopérant avec un pignon d'un deuxième mécanisme de réglage associé à un deuxième organe de manoeuvre.The holding device further comprises a neck restraint with retaining strap having a fixed end, and an opposite end equipped with a third rack cooperating with a pinion of a second adjustment mechanism associated with a second operating member.

Les premier et deuxième mécanismes de réglage sont agencés dans un premier et deuxième espaces sur les deux côtes latéraux opposés au voisinage de la zone médiane de la calotte.The first and second adjustment mechanisms are arranged in a first and second spaces on the two lateral ribs opposite in the vicinity of the median zone of the cap.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté aux dessins annexés dans lesquels :

  • la figure 1 est une vue en élévation de l'intérieur du casque selon l'invention ;
  • les figures 2 et 3 montrent deux vues en perspective du casque, équipé du premier mécanisme de réglage du tour de tête ;
  • la figure 4 représente une autre vue en perspective du casque, équipé du deuxième mécanisme de réglage du serre-nuque ;
  • les figures 5 et 6 sont des vues en coupe respectivement selon les lignes 5-5 et 6-6 de la figure 1 ;
  • la figure 7 est une vue similaire de la figure 3 d'une variante de réalisation.
  • la figure 8 montre un perfectionnement du mécanisme de réglage représenté en position verrouillée;
  • la figure 9 est une vue en coupe selon la ligne 9-9 de la figure 8;
  • la figure 10 est une vue identique à la figure 8 en position déverrouillée du mécanisme de réglage.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example, and represented in the appended drawings in which:
  • Figure 1 is an elevational view of the interior of the helmet according to the invention;
  • Figures 2 and 3 show two perspective views of the helmet, equipped with the first head circumference adjustment mechanism;
  • FIG. 4 represents another perspective view of the helmet, equipped with the second neckband adjustment mechanism;
  • Figures 5 and 6 are sectional views respectively along lines 5-5 and 6-6 of Figure 1;
  • Figure 7 is a similar view of Figure 3 of an alternative embodiment.
  • Figure 8 shows an improvement of the adjustment mechanism shown in the locked position;
  • Figure 9 is a sectional view along line 9-9 of Figure 8;
  • Figure 10 is a view identical to Figure 8 in the unlocked position of the adjustment mechanism.

Sur les figures 1 à 6, un casque 10 de sécurité comporte une calotte 12 réalisée en matériau résistant à des chocs mécaniques, et délimitant un volume interne 14 équipé d'une coiffe 16, et d'un dispositif de maintien 17 adaptable à la tête de l'utilisateur. La coiffe 16 est formée par un croisillon de deux sangles 18, 20, cousues entre elles dans la zone centrale d'intersection 21, et attachées par leurs extrémités à quatre points d'attache 22, 24, 26, 28, échelonnés à intervalles prédéterminées le long du bord 30 de la calotte 12. La coiffe 16 enveloppe le dessus de la tête, et est séparée de la paroi interne de la calotte 12 par un intervalle d'isolement (non représenté) évitant toute transmission de contraintes mécaniques vers la tête lors d'un choc externe encaissé par la calotte 12.In FIGS. 1 to 6, a safety helmet 10 comprises a cap 12 made of material resistant to mechanical shock, and delimiting an internal volume 14 equipped with a cap 16, and a holding device 17 adaptable to the head of the user. The cover 16 is formed by a cross of two straps 18, 20, sewn together in the central intersection zone 21, and attached by their ends to four attachment points 22, 24, 26, 28, staggered at predetermined intervals along the edge 30 of the cap 12. The cap 16 envelops the top of the head, and is separated from the internal wall of the cap 12 by an isolation gap (not shown) avoiding any transmission of mechanical stresses to the head during an external shock absorbed by the cap 12.

Le dispositif de maintien 17 du casque 10 comporte un tour de tête 32 interne destiné à enserrer le pourtour de la tête de l'utilisateur, et un serre-nuque 34 à sangle de retenue montée débordante vers la partie arrière 36 du casque 10.The device 17 for holding the helmet 10 includes an internal headband 32 intended to enclose the periphery of the user's head, and a neckband 34 with a retaining strap mounted projecting towards the rear part 36 of the helmet 10.

Le tour de tête 32 est réalisé à partir d'une bande souple conformée selon un anneau fermé, agencé en retrait du bord 30 en épousant la configuration interne de la base de la calotte 12. L'ajustage du périmètre du tour de tête 32 s'opère au moyen d'un premier mécanisme de réglage 38, comprenant un pignon inverseur 40 engrènant avec une première et une deuxième crémaillères 42, 44 agencées aux deux extrémités 43, 45 rétrécies de la bande. Le pignon 40 denté fait partie intégrante d'une première bague 46 de manoeuvre solidaire d'un axe 48 monté à rotation dans un orifice 50 d'un premier flasque 52 fixe.The head circumference 32 is produced from a flexible strip shaped according to a closed ring, arranged back from the edge 30 by conforming to the internal configuration of the base of the cap 12. The adjustment of the perimeter of the head circumference 32 s 'operates by means of a first adjustment mechanism 38, comprising a reversing pinion 40 meshing with first and second racks 42, 44 arranged at the two narrowed ends 43, 45 of the strip. The toothed pinion 40 is part integral with a first maneuvering ring 46 integral with an axis 48 rotatably mounted in an orifice 50 of a first fixed flange 52.

Le premier flasque 52 est séparé de la paroi interne de la calotte 12 par un premier espace 54 latéral de logement du premier mécanisme de réglage 38. Le flasque 52 est solidarisé à la paroi interne de la calotte 12 en un premier point de fixation 56, et vient avantageusement de moulage avec la calotte 12, réalisée en matériau plastique. L'axe 48 s'étend sensiblement perpendiculairement à la paroi de la calotte 12, et l'ensemble bague 46 et pignon 40 est monté coaxialement sur l'axe 48.The first flange 52 is separated from the internal wall of the cap 12 by a first lateral space 54 for housing the first adjustment mechanism 38. The flange 52 is secured to the internal wall of the cap 12 at a first attachment point 56, and advantageously comes from molding with the cap 12, made of plastic material. The axis 48 extends substantially perpendicularly to the wall of the cap 12, and the ring 46 and pinion 40 assembly is mounted coaxially on the axis 48.

Les deux extrémités 43, 45 méplates et rétrécies du tour de tête 32 sont disposées de chant dans un même plan perpendiculaire à l'axe 48 de la bague 46 de manoeuvre, engendrant la mise en regard des deux crémaillères 42, 44 avec interposition du pignon inverseur 40. Une cage de guidage 58 est montée coaxialement sur l'axe 48 pour maintenir le positionnement des deux crémaillères 42, 44 sur les dents du pignon 40.The two flat and narrowed ends 43, 45 of the head circumference 32 are arranged in song in the same plane perpendicular to the axis 48 of the operating ring 46, causing the two racks 42, 44 to face each other with the pinion interposed reverser 40. A guide cage 58 is mounted coaxially on the axis 48 to maintain the positioning of the two racks 42, 44 on the teeth of the pinion 40.

L'association du pignon 40 avec les deux crémaillères 42, 44 se trouve dans un même plan intercalé entre la bague 46 de manoeuvre et la cage de guidage 58. La denture de la première crémaillère 42 est orientée vers la base de la calotte 12, et fait partie de l'extrémité 43 de la partie postérieure du tour de tête 32. La denture de la deuxième crémaillère 44 est orientée vers l'intérieur du casque 10, et fait partie de l'autre extrémité 45 associée à la partie antérieure du tour de tête 32. La largeur de chaque extrémité 43, 45 est sensiblement identique, et est inférieure à la moitié de la largeur totale de la bande. L'intervalle entre les deux crémaillères 42, 44 correspond sensiblement au diamètre extérieur du pignon 40.The association of the pinion 40 with the two racks 42, 44 is located in the same plane interposed between the operating ring 46 and the guide cage 58. The teeth of the first rack 42 are oriented towards the base of the cap 12, and forms part of the end 43 of the rear part of the head circumference 32. The teeth of the second rack 44 are oriented towards the inside of the helmet 10, and form part of the other end 45 associated with the front part of the head circumference 32. The width of each end 43, 45 is substantially identical, and is less than half the total width of the strip. The interval between the two racks 42, 44 corresponds substantially to the outside diameter of the pinion 40.

La partie antérieure du tour de tête 32 est équipée d'une attache 60 flexible munie de deux fentes 62, 64 oblongues et parallèles, dont l'une 62 d'entre elles peut être clipsée sur un plot 66 d'ancrage fixé à la paroi interne de la calotte 12. Une autre attache élastique (non représentée) de structure identique est agencée à l'opposé de l'attache 60, sur la partie postérieure du tour de tête 32.The front part of the headband 32 is equipped with a flexible fastener 60 provided with two oblong and parallel slots 62, 64, one of which 62 can be clipped onto an anchoring stud 66 fixed to the wall internal of the cap 12. Another elastic fastener (not shown) of identical structure is arranged opposite the fastener 60, on the rear part of the head circumference 32.

Le premier mécanisme de réglage 38 et les deux extrémités 43, 45 du tour de tête 32 se trouvent sur l'un des côtés latéraux de la calotte 12, de préférence dans la zone médiane entre les deux attaches 60 opposées. La bague 46 de manoeuvre fait légèrement saillie du bord 30 de la calotte 12 pour faciliter la préhension lors du réglage du tour de tête 32.The first adjustment mechanism 38 and the two ends 43, 45 of the head circumference 32 are located on one of the lateral sides of the cap 12, preferably in the middle zone between the two opposite fasteners 60. The operating ring 46 protrudes slightly from the edge 30 of the cap 12 to facilitate gripping when adjusting the head circumference 32.

Le fonctionnement du premier mécanisme 38 de réglage du tour de tête 32 est le suivant :The operation of the first mechanism 38 for adjusting the head circumference 32 is as follows:

Après mise en place du casque 10 sur la tête, l'ajustage du tour de tête 32 peut être opéré d'une seule main par l'utilisateur, en faisant tourner la bague 46 de manoeuvre dans un sens déterminé. Le pignon 40 transmet le mouvement de rotation de la bague 46 aux deux crémaillères 42, 44, en provoquant un mouvement de coulissement en directions inverses des extrémités 43, 45 correspondantes du tour de tête 32. Il en résulte une diminution ou un agrandissement du périmètre de la bande en fonction du sens d'actionnement de la bague 46 rotative.After fitting the helmet 10 on the head, the adjustment of the head circumference 32 can be carried out with one hand by the user, by rotating the operating ring 46 in a determined direction. The pinion 40 transmits the rotational movement of the ring 46 to the two racks 42, 44, causing a sliding movement in opposite directions of the corresponding ends 43, 45 of the head circumference 32. This results in a reduction or an enlargement of the perimeter of the strip as a function of the direction of actuation of the rotary ring 46.

Les courses des deux extrémités 43, 45 du tour de tête 32 sont identiques en étant déterminées par le rayon du pignon inverseur 40 transformant le mouvement de rotation de la bague 46 en mouvement de coulissement. La présence du pignon inverseur 40 associé à la crémaillère double 42, 44 permet de conserver le centrage des parties antérieure et postérieure de la bande, indépendamment de la taille du tour de tête 32. L'élasticité des deux attaches 60 suit le mouvement de rapprochement des parties antérieure et postérieure de la bande lors du réglage de la bague 46, tout en maintenant le tour de tête à un niveau prédéterminé, légèrement en retrait du bord 30 de la calotte 12. Sur la figure 3, la fente 62 coopère avec le plot d'ancrage 66. Le tour de tête 32 peut être rapproché du bord 30 par usage de l'autre fente 64 adjacente.The races of the two ends 43, 45 of the head circumference 32 are identical, being determined by the radius of the reversing pinion 40 transforming the rotational movement of the ring 46 into sliding movement. The presence of the reversing pinion 40 associated with the double rack 42, 44 makes it possible to keep the centering of the anterior and posterior parts of the strip, regardless of the size of the head circumference 32. The elasticity of the two fasteners 60 follows the movement of approach of the front and rear parts of the band when adjusting the ring 46, while maintaining the head circumference at a predetermined level, slightly set back from the edge 30 of the cap 12. In FIG. 3, the slot 62 cooperates with the anchoring pad 66. The head circumference 32 can be brought closer to the edge 30 by using the other adjacent slot 64.

L'une des extrémités (à droite sur la figure 1) de la sangle du serre-nuque 34 est fixe, en étant solidarisée par exemple au premier flasque 52. L'extrémité opposée 68 (celle de gauche sur la figure 1) du serre-nuque 34 est équipée d'une troisième crémaillère 70 coopérant avec un pignon 72 d'un deuxième mécanisme de réglage 74, montré en détail aux figures 4 et 6.One of the ends (on the right in FIG. 1) of the strap of the neckband 34 is fixed, being secured for example to the first flange 52. The opposite end 68 (the one on the left in FIG. 1) of the greenhouse -nuque 34 is equipped with a third rack 70 cooperating with a pinion 72 with a second adjustment mechanism 74, shown in detail in FIGS. 4 and 6.

A l'intérieur du volume 14, le deuxième mécanisme 74 est logé dans un deuxième espace 76 délimité par un deuxième flasque 78, lequel est solidarisé à la paroi interne de la calotte 12 en un deuxième point de fixation 80. Le pignon 72 est monté coaxialement sur un axe 82 d'une deuxième bague de manoeuvre 84. L'axe 82 est introduit avec un léger jeu dans un orifice 86 du deuxième flasque 78, et se trouve sensiblement en alignement avec l'autre axe 48 du premier mécanisme 38 de réglage.Inside the volume 14, the second mechanism 74 is housed in a second space 76 delimited by a second flange 78, which is secured to the internal wall of the cap 12 at a second fixing point 80. The pinion 72 is mounted coaxially on an axis 82 of a second operating ring 84. The axis 82 is introduced with a slight clearance in an orifice 86 of the second flange 78, and is substantially in alignment with the other axis 48 of the first adjustment mechanism 38.

Une pièce de guidage 88 solidaire du tour de tête 32 est logée dans le deuxième espace 76 en contact avec le flasque 78, et assure le positionnement coplanaire de la troisième crémaillère 70 par rapport au pignon 72. L'ensemble crémaillère 70 et pignon 72 est disposé dans un plan perpendiculaire à l'axe 82, en étant inséré entre la pièce de guidage 88 et la deuxième bague de manoeuvre 84.A guide piece 88 secured to the head circumference 32 is housed in the second space 76 in contact with the flange 78, and ensures the coplanar positioning of the third rack 70 relative to the pinion 72. The rack 70 and pinion 72 assembly is disposed in a plane perpendicular to the axis 82, being inserted between the guide piece 88 and the second operating ring 84.

Une rotation de la deuxième bague de manoeuvre 84 dans le sens horaire (sur la figure 4) provoque un coulissement vers la droite de l'extrémité 68, correspondant à un agrandissement de la longueur utile du serre-nuque 34. Pour assurer le serrage progressif du serre-nuque 34 en cours d'utilisation du casque 10, il suffit de tourner la deuxième bague 84 dans le sens inverse des aiguilles d'une montre.Rotating the second operating ring 84 clockwise (in FIG. 4) causes the end 68 to slide to the right, corresponding to an enlargement of the useful length of the neckband 34. To ensure progressive tightening of the neckband 34 during use of the helmet 10, it suffices to turn the second ring 84 anticlockwise.

Les deux réglages du tour de tête 32 et du serre-nuque 34 s'effectuent en position montée du casque 10 et permettent d'obtenir un ajustage parfait. Les deux mécanismes de réglage 38, 74 sont agencés sur les deux côtés opposés dans la zone médiane de la calotte 12. Le réglage du tour de tête 32 est opéré par la main gauche, et celui du serre-nuque 34 par la main droite de l'utilisateur. Il n'est pas nécessaire d'enlever le casque 10 pour faire ces réglages, et le centrage du tour de tête 32 est conservé dans le volume interne 14 de la calotte 12.The two adjustments of the headband 32 and the neckband 34 are carried out in the mounted position of the helmet 10 and allow a perfect adjustment to be obtained. The two adjustment mechanisms 38, 74 are arranged on the two opposite sides in the middle zone of the cap 12. The adjustment of the head circumference 32 is operated by the left hand, and that of the neckband 34 by the right hand of the user. It is not necessary to remove the helmet 10 to make these adjustments, and the centering of the head circumference 32 is kept in the internal volume 14 of the cap 12.

Les crémaillères 42, 44, 70 peuvent être des pièces distinctes rapportées aux extrémités 43, 45, 68 correspondantes du tour de tête 32, et du serre-nuque 34.The racks 42, 44, 70 may be separate parts attached to the corresponding ends 43, 45, 68 of the headband 32, and of the neckband 34.

Les crémaillères 42, 44, 70 peuvent être réalisées directement par un surmoulage des sangles.The racks 42, 44, 70 can be produced directly by overmolding the straps.

Selon une autre variante (non représentée), il est possible de remplacer le système à double crémaillère 42, 44 et pignon inverseur 40 du premier mécanisme 38 par deux dispositifs de réglage indépendants associés à la partie antérieure et à la partie postérieure du tour de tête 32, chacun des dispositifs comprenant un pignon et une crémaillère simple. La calotte 12 du casque peut être réalisée en matériau plastique ou métallique.According to another variant (not shown), it is possible to replace the double rack system 42, 44 and reversing pinion 40 of the first mechanism 38 by two independent adjustment devices associated with the part anterior and at the posterior part of the head circumference 32, each of the devices comprising a pinion and a simple rack. The cap 12 of the helmet can be made of plastic or metallic material.

Selon une variante de la figure 7, l'attache 60 comporte une première partie flexible 93 de section rétrécie, et une deuxième partie élargie dotée de deux trous 90, 91 dont l'un au choix est clipsé sur un plot d'ancrage 94 de la calotte en fonction de la hauteur souhaitée du tour de tête 32.According to a variant of FIG. 7, the fastener 60 comprises a first flexible part 93 of narrowed section, and a second enlarged part provided with two holes 90, 91 of which one of your choice is clipped onto an anchoring stud 94 of the cap as a function of the desired height of the head circumference 32.

Sur les figures 8-10, un perfectionnement du premier mécanisme de réglage 38 de la figure 2 permet de verrouiller la double crémaillère 42, 44 dans une position d'ajustage prédéterminée. Ce perfectionnement du mécanisme est désigné par le repère général 138, et les mêmes numéros de repères seront utilisés par la suite pour désigner des pièces identiques ou similaires. La bague de manoeuvre 46 du mécanisme 138 comporte une portion périphérique 140 de préhension réunie à une portion intermédiaire 142 de support du pignon 40 par des nervures 144 élastiques. La portion de préhension 140 est équipée sur sa surface interne d'un crantage 146 annulaire destiné à coopérer avec une butée 148 crantée solidaire du guide 150 de logement des deux extrémités 43, 45 du tour de tête 32. La portion intermédiaire 142 est munie de plusieurs dents 152 radiales logées avec jeu dans des encoches 154 conjuguées d'entraînement de la portion de préhension 140.In FIGS. 8-10, an improvement of the first adjustment mechanism 38 in FIG. 2 makes it possible to lock the double rack 42, 44 in a predetermined adjustment position. This improvement in the mechanism is designated by the general reference 138, and the same reference numbers will be used subsequently to designate identical or similar parts. The operating ring 46 of the mechanism 138 includes a peripheral portion 140 for gripping joined to an intermediate portion 142 for supporting the pinion 40 by elastic ribs 144. The gripping portion 140 is equipped on its internal surface with an annular notch 146 intended to cooperate with a notched stop 148 secured to the guide 150 for housing the two ends 43, 45 of the head circumference 32. The intermediate portion 142 is provided with several radial teeth 152 housed with play in notches 154 conjugate for driving the gripping portion 140.

Sur la figure 9, le mécanisme 138 se trouve dans une position de repos, et l'élasticité des nervures 144 sollicite l'engrenage du crantage 146 de la bague 46 avec les crans de la butée 148 fixe. Toute rotation forcée de la bague 46 autour de l'axe 48 est rendue impossible par l'effet de verrouillage du crantage 146 par la butée 148. Le pignon 40 reste immobilisé, ainsi que les deux crémaillères 42, 44 du tour de tête 32.In FIG. 9, the mechanism 138 is in a rest position, and the elasticity of the ribs 144 urges the gear of the notch 146 of the ring 46 with the notches of the fixed abutment 148. Any forced rotation of the ring 46 around the axis 48 is made impossible by the locking effect of the notch 146 by the stop 148. The pinion 40 remains immobilized, as well as the two racks 42, 44 of the head circumference 32.

Pour modifier la longueur du tour de tête 32, il suffit dans une première phase d'exercer une pression sur la bague 46 dans le sens de la flèche F (figure 10) provoquant un effet de verrouillage grâce au dégagement du crantage 146 de la butée 148, puis dans une deuxième phase de tourner la bague 46 dans un sens prédéterminé pour entraîner les dents 152 et déplacer les crémaillères 42, 44. La force de déverrouillage doit vaincre l'action élastique et antagoniste des nervures 144, et est maintenue en permanence durant la rotation de la bague 46. Après ajustage du tour de tête 32, l'utilisateur relâche la pression sur la bague 46, laquelle reprend automatiquement la position verrouillée de repos de la figure 9 par l'action de rappel élastique des nervures 144. En présence de forces de traction sur la bande du tour de tête 32, notamment lors d'un choc extérieur sur la calotte 12, le pignon 40 reste fixe grâce à l'effet de verrouillage du crantage 146.To modify the length of the head circumference 32, it suffices in a first phase to exert a pressure on the ring 46 in the direction of the arrow F (FIG. 10) causing a locking effect thanks to the release of the notch 146 from the stop 148, then in a second phase of turning the ring 46 in a predetermined direction to drive the teeth 152 and move the racks 42, 44. The unlocking force must overcome the elastic and antagonistic action of the ribs 144, and is maintained permanently during the rotation of the ring 46. After adjusting the head circumference 32, the user releases the pressure on the ring 46, which automatically resumes the locked rest position of FIG. 9 by the elastic return action of the ribs 144. In the presence of forces traction on the band of the head circumference 32, in particular during an external impact on the cap 12, the pinion 40 remains fixed by virtue of the locking effect of the notch 146.

Claims (9)

  1. A safety helmet with a crown (12) made of material resistant to mechanical shocks, containing a lining cap (16) separated from the peak of the crown (12) by an insulating gap, a securing device (17) having a head-band (32) with a flexible annular band arranged away from the edge (30) of the crown (12) to grip the circumference of the user's head, and means for adjusting the length of the head-band comprising :
    - a first mechanism (38) with operating inverter pinion (40) cooperating simultaneously with a first crown-wheel (42) and a second crown-wheel (44) located respectively at the two opposite ends (43, 45) of the strip, the toothing of the two crown-wheels (42, 43) being identical,
    - a first operating device (46) accessible from outside and able to be grasped in the fitted position of the helmet (10) on the user's head, said operating device (46) being in mechanical connection with the inverter pinion (40), and being formed by a rotating ring comprising a spindle (48) on which the inverter pinion (40) is mounted, which is arranged to transform the rotation movement of the ring into two reverse sliding movements of the two crown-wheels (42, 44) resulting in an increase or decrease of the length of the head-band (32) depending on the rotation direction of the ring,
    characterized in that
    - the first adjustment mechanism (38) and the two ends (43, 45) of the head-band (32) are located on one of the lateral sides of the crown (12), preferably in the middle zone, so as to preserve centering of the front and rear parts of the head-band (32) when adjustment is performed by the first mechanism (38),
    - the front part and the rear part of the head-band (32) each comprise a flexible attachment (60) securedly united to the crown (12), the flexibility of the attachment (60) being able to follow the movement of decreasing or increasing the size of the head-band (32) when the operating device (46) is adjusted, while ensuring that the head-band (32) is maintained at a pre-determined level.
  2. The safety helmet according to claim 1, characterized in that the spindle (48) of the operating ring (46) is mounted with rotation in an orifice (50) of a first fixed flange (52), in an appreciably perpendicular direction to the side wall of the crown (12), and that the inverter pinion (40) is located with the first and second crown-wheels (42, 44) in the same plane perpendicular to the spindle (48).
  3. The safety helmet according to claim 2, characterized in that the first flange (52) is separated from the internal wall of the crown (12) by a first lateral space (54) for housing the first adjustment mechanism (38), comprising in addition a guide cage (58) to ensure positioning of the two crown-wheels (42, 44) on the teeth of the inverter pinion (40), the two crown-wheels (42, 44) and pinion (40) assembly being located between the operating ring ( 46) and the guide cage (58).
  4. The safety helmet according to claim 1, characterized in that each flexible attachment (60) comprises two staggered orifices (62,64; 90,91), either one of which can be clipped onto a securing stud (66) according to the required level of the head-band (32).
  5. The safety helmet according to one of claims 1 to 4, characterized in that the securing device (17) in addition comprises a neck-band (34) with retaining strap having a fixed end, and an opposite end (68) equipped with a third crown-wheel (70) cooperating with a pinion (72) of a second adjustment mechanism (74) associated with a second operating device (84).
  6. The safety helmet according to claim 5, characterized in that the first and second adjustment mechanisms (38, 74) are arranged respectively in the first and second spaces (54, 76) on the two opposite lateral sides near the mid-zone of the crown (12).
  7. The safety helmet according to claim 6, characterized in that the second operating device (84) is formed by a rotating ring with a rotation spindle (82) engaged in an orifice (86) of a second flange (78), that the pinion (72) is mounted coaxially on the spindle (82), and that a guide part (88) securedly united to the head-band (32) is housed in the second space (76) to ensure positioning of the third crown-wheel (68) on the pinion (72).
  8. The safety helmet according to claim 1 or 2, characterized in that the operating ring (46) comprises :
    - a first gripping portion (140) equipped with an annular toothing (146) designed to cooperate with a toothed stop (148) securedly united to a fixed guide (150) housing the two ends (43, 45) of the head-band (32),
    - a second support portion (142) of the pinion (40), which is joined to the first portion (140) by flexible ribs (144),
    - and means (152, 154) for driving the pinion (40) in rotation when rotation of the ring (46) takes place after the toothing (146) has been unlocked.
  9. The safety helmet according to claim 8, characterized in that the toothing (146) cooperates with the elastic effect of the teeth of the stop (148) to lock the double crown-wheel (42, 44) in a predetermined adjustment position, the unlocking being performed in the opposite direction by a manual action on the ring (46) resulting in the toothing (146) being released from the stop (148).
EP93420075A 1992-02-27 1993-02-16 Safety helmet with adjustable headband Expired - Lifetime EP0558427B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9202432A FR2687902B1 (en) 1992-02-27 1992-02-27 SAFETY HELMET WITH ADJUSTMENT OF THE HOLDING DEVICE ON THE HEAD.
FR9202432 1992-02-27

Publications (2)

Publication Number Publication Date
EP0558427A1 EP0558427A1 (en) 1993-09-01
EP0558427B1 true EP0558427B1 (en) 1997-06-04

Family

ID=9427219

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Application Number Title Priority Date Filing Date
EP93420075A Expired - Lifetime EP0558427B1 (en) 1992-02-27 1993-02-16 Safety helmet with adjustable headband

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US (1) US5373588A (en)
EP (1) EP0558427B1 (en)
JP (1) JP3328351B2 (en)
DE (1) DE69311158T2 (en)
ES (1) ES2105181T3 (en)
FR (1) FR2687902B1 (en)

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Also Published As

Publication number Publication date
US5373588A (en) 1994-12-20
FR2687902B1 (en) 1997-03-21
FR2687902A1 (en) 1993-09-03
DE69311158D1 (en) 1997-07-10
ES2105181T3 (en) 1997-10-16
JPH062208A (en) 1994-01-11
EP0558427A1 (en) 1993-09-01
JP3328351B2 (en) 2002-09-24
DE69311158T2 (en) 1998-01-15

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