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EP0289569B1 - Casque de protection a visiere pivotante et encliquetable, notamment pour motocylistes - Google Patents

Casque de protection a visiere pivotante et encliquetable, notamment pour motocylistes Download PDF

Info

Publication number
EP0289569B1
EP0289569B1 EP87907500A EP87907500A EP0289569B1 EP 0289569 B1 EP0289569 B1 EP 0289569B1 EP 87907500 A EP87907500 A EP 87907500A EP 87907500 A EP87907500 A EP 87907500A EP 0289569 B1 EP0289569 B1 EP 0289569B1
Authority
EP
European Patent Office
Prior art keywords
locking
visor
protective helmet
helmet
spring
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
EP87907500A
Other languages
German (de)
English (en)
Other versions
EP0289569A1 (fr
Inventor
Artur Föhl
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19863639261 external-priority patent/DE3639261A1/de
Priority claimed from DE8708787U external-priority patent/DE8708787U1/de
Application filed by Individual filed Critical Individual
Priority to AT87907500T priority Critical patent/ATE65166T1/de
Publication of EP0289569A1 publication Critical patent/EP0289569A1/fr
Application granted granted Critical
Publication of EP0289569B1 publication Critical patent/EP0289569B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A42B3/221—Attaching visors to helmet shells, e.g. on motorcycle helmets
    • A42B3/222—Attaching visors to helmet shells, e.g. on motorcycle helmets in an articulated manner, e.g. hinge devices

Definitions

  • the invention relates to a protective helmet, in particular for motorcyclists, with a visor covering the face opening, which is pivotally mounted on the side of the helmet shell and at least in its closed position by means of a locking device consisting of a locking cam and a locking element provided with at least one locking recess, and one of the locking cams and the locking element in the direction of the pivot point of the visor against each other spring element, can be locked, the locking element or locking cams being pivotally mounted with the visor disk.
  • Crash helmets with visors for pivoting and latching the visor in different positions, but at least in the two end positions, are known per se, see for example US-A-3 066 305 or GB-A-2 021 000.
  • Conventional adjustment devices are relatively complicated built up of many individual parts, which makes a helmet significantly more expensive. For this reason, unfortunately cheap spring elements made of plastic are often used to lock the visor in the protective helmets.
  • these have the major disadvantage that if they are constantly under load - as is the case with a sighting device - they tend to "creep", ie the forces go to zero over time.
  • Visor devices of this type are therefore a great safety risk because, for example, a sudden jump due to the loss of spring tension at high speed can put the driver in a very dangerous situation which must be avoided in any case.
  • metal springs could not be optimally dimensioned due to their significantly lower expansion stress in the existing, structurally specified installation space, so that they can achieve the required, predetermined number of load cycles without breaking. For this reason, e.g. Simple, metallic flat springs, which are cheap to manufacture, have so far not been usable.
  • a visor should also be relatively easy to replace by a layperson, since damage to the visor occurs again and again, for example, only by simply scratching or becoming blind.
  • the sighting device with detent should also be designed in such a way that even after replacement without special adjustment and adjustment manipulations, the pivotal movement and the grating function properly, since inadequate fastening or inadequate grating, as already mentioned, can lead to serious accidents if For example, when turning the head, the visor, which is closed as such, is torn open due to improper replacement or functioning of the grid by the wind pressure, and the driver is exposed to the full wind pressure while simultaneously restricting the field of vision and possibly shear forces on the head.
  • the visor device should be designed so that it is suitable for both preformed visor panes and flexible visor panes, which are put on when using initially flat plates, whereby multilayer panes can also be used as flexible visor panes.
  • opening of the visor should be reliably prevented, regardless of whether the rim of the visor rests on the edge of the face opening of the helmet, or so with its edge in around the opening in the face of the helmet engages so that the outer contour of the helmet runs continuously over the visor.
  • the object of the invention is to provide a protective helmet with a visor device, which is cheap to manufacture and easy to use and which, moreover, guarantees great safety even when driving at high speeds, even with a very long useful life of the helmet, so that even when Swiveling the head prevents an unwanted opening of the visor.
  • the locking forces required to hold the visor in the closed position should remain largely constant over the period of use of a helmet, and this when using simple springs in connection with a simple construction consisting of a few parts.
  • a replacement of the visor regardless of whether it is a simple flexible visor or a multi-layer pane, should be easily possible without the holding force to be applied in each case having to be readjusted for the latching device.
  • a locking element which is non-rotatably connected to the visor disk and which is rotatably guided together with the visor disk in the interior of a bearing piece on a hub part.
  • a locking cam is provided in the bearing piece, which cooperates with the locking element on the visor or its or its recess.
  • Locking cams and locking element are resiliently biased against each other so that a perfect interaction between locking cams and locking element is guaranteed.
  • the locking element and the visor provided with a hub for the pivoting movement are e.g. detachably attached to the side of the helmet shell using a screw.
  • the helmet shell may have a recess in this area for receiving the bearing piece.
  • the bearing and latching element itself can be provided with a segment-like projection, on the periphery of which latching notches are arranged which cooperate with a leaf spring having at least one latching hump and fastened in the bearing piece itself.
  • the locking notches are to be designed with different depths, in particular the two locking notches for the end positions should be formed deeper than the notches for securing the Intermediate positions, stable end positions of the sighting device are reached.
  • the locking recess of the locking element assigned to the closed position is offset such that, depending on the spring-loaded locking cams, a pretensioning force on the side wall of the locking recess and thus on the locking element and the visor is exercised in the closing direction.
  • This then has the advantage that the visor disk is pressed firmly onto the optionally recessed edge of the face cutout of the safety helmet - otherwise with an extremely low locking force.
  • the latching recess assigned to the open position of the visor is also displaced in the latching element in such a way that a bias in the direction of the open position is also achieved in this position, so that an absolutely stable and quiet position of the visor is also guaranteed in the open position and even when using the helmet with the visor open, for example when driving slowly or when moving on foot, there is no need to accept wobbling or vibration of the visor.
  • the magnitude of the force depends on the angle of attack of the latching cam and the slope of the engagement surface on the latching element bearing of the latching recess.
  • a latching recess of a latching element is arranged and shaped such that a displacement of the engagement points of the latching cam over the entire length of the ramp surface of a latching recess generates a pivoting angle range of the visor disk of approximately 5 ° to 15 °, but preferably 8 ° for generating the pretensioning force.
  • the angle between the direction of force derived from the flank of the locking cam and the direction of force of the spring element itself in the direction of the pivoting angle between 25 ° and 45 ° is preferred, according to another development of the inventive concept however chosen with 35 °.
  • the spring element is exposed to a very high load and is therefore a vulnerable component, also with regard to the simultaneous fulfillment of the hard endurance test to which such sighting devices are subjected.
  • the spring element as a single-layer or multi-layer leaf spring, preferably only the spring leaf opposite the latching element forming an arc-shaped or angular latching cam when using a multi-layer leaf spring.
  • FIG. 1 shows schematically in perspective view a helmet with helmet shell 1 and visor disk 2.
  • the visor disk 2 covers the face opening in the helmet shell.
  • the visor is pivotally attached to the side of the helmet shell of the helmet, so that the face opening can be opened by opening and closed again by folding down.
  • the edge of the visor disc lies flush against the correspondingly shaped helmet shell or an edge recess in the helmet shell.
  • a recess 3 is provided in the front of the helmet shell 1 for reaching under the edge of the visor plate 2.
  • Fig. 1A shows the helmet in a side view, the mutual spatial assignment of helmet shell 1, visor 2, bearing point of the visor and swivel angle are dimensioned so that the effect of these individual parts can be better understood later in connection with the explanation of individual parts.
  • screw-on surfaces 4 are provided on the helmet shell, which have depressions 5 for fixing a bearing piece to be fastened there, as will be explained.
  • the bearing piece itself is attached using a screw.
  • a fastening nut 6 is arranged in the screw-on surface 4.
  • Fig. 3 shows a top view of the development of a visor 2 in the form of a flat plate, as it can be made of transparent, bendable plastic.
  • This plate gets its shape, for example, by punching. It has at its two ends 8 and 9 two recesses 10 and 11 for receiving a bearing and locking element, the design, structure and function of which will be explained.
  • lugs 7 are also left, which form a stop gap, the function of which will also be explained, with ends 8 and 9, respectively.
  • the mounting of the visor disk 2 on the outside of the helmet can be seen essentially in a sectional view from FIG. 4.
  • the section of a longitudinal section of a helmet shell 1 shown there carries in the fastening area a fastening nut 12 for receiving a screw 14, via which a bearing piece 13 is screwed on.
  • the fixation is carried out by lugs 15 and 16 ( Figure 5) which engage in the recesses 5 ( Figure 2) on the helmet shell.
  • the bearing piece 13 has in a hub part 17 through which the screw 14 is guided and on which a latching element 18 is rotatably mounted together with the visor disk 2 with play.
  • the locking element 18 has a collar 19 toward the helmet shell, the surface of which facing the helmet shell slides on the outer surface of the helmet shell in the fastening area.
  • the side of the locking element 18 facing away from the collar has an extension 20 (FIG. 7) which extends from the bore 21 in the form of a segment.
  • the outer contours of the segment-shaped projection 20 recesses 10 and 11 in the visor 2 are adapted.
  • the detent spring is designed as a two-part leaf spring 23, 24, the leaf spring 23, which is assigned to the detent recesses, having a detent bump 31 which, as can be seen from FIGS. 5 and 6 can be seen, engages accordingly in the notches 22.
  • the right-hand recess 22 assigned to the closed position is arranged in such a way that the detent cam 31 of the detent spring 23 does not come to full detent depth, but rests laterally and exerts pressure on the detent element and thus on the visor disc in Closing direction.
  • the locking recess is offset so that a displacement of the points of attack to generate the biasing force by the locking cam over the entire length a ramp surface of the recess 22 forms a swivel angle range ⁇ of the visor 7 between 5 ° and 15 °, but preferably 8 °.
  • a holder force B at the locking distance r must be correspondingly high, specifically to generate a holding force A at the lower edge of the visor by a factor R / r greater than the holding force B.
  • a two-layer spring is provided for this, as can be seen first in FIG. 7, instead of a simple locking spring, the upper leaf spring 23 facing the locking recess having a locking hump 31 and for spatial fixing in the holding part 13 on one side 42 is angled.
  • this cedar which is provided with a locking hump, will be designed somewhat thinner than the underlying flat support spring 29, which can be subjected to a correspondingly higher load due to its smooth shape.
  • this spring (retaining lug 40) is also angled, even if this leaf spring itself does not have to be fixed exactly in space.
  • FIGS. 4 and 5 show representations analogous to FIGS. 4 and 5 for this embodiment. It can be seen in FIG. 8A that the gap formed on the nose 16 with the ends of the visor disk and the nose comes to rest in the open position.
  • Fig. 9 shows a further embodiment of a storage and Locking element 18 'and Fig. 10 shows that within the scope of the invention, the bearing end of the visor 2 and locking element 18 ⁇ can also be formed in one piece.
  • FIG. 11 shows a modification of the locking element arrangement in a further embodiment, in which a separate bearing piece 13 is omitted.
  • the pivot bearing of the visor is formed by a clip 47, which is pressed by aligned holes in the visor plate 48 and in the helmet shell 48 '.
  • the locking element is attached in the form of an arcuate strip 46 on the inside of a visor plate 45 and is guided in a corresponding recess 42 of the helmet shell in the area of the bearing surface 4.
  • the arc-shaped locking bar 46 works together with a two-layer locking spring 40 and 41 also held in notches 43 in the recess 42.
  • the figures 12-18 show different spring designs or arrangements.
  • the leaf spring 41 provided with locking cams is spatially fixed via an angled end, while the underlying continuous leaf spring 40 'is only supported accordingly. 13, as already described above, both the lower leaf spring 40 and the upper leaf spring 41 are laterally fixed via angled tabs.
  • Fig. 15 shows that in the context of the invention, a multi-layer leaf spring can also be produced in one piece by the spring band being bent accordingly around a retaining pin 27, whereby the one-piece detent spring 23 acting like a double-layer leaf spring is spatially fixed at the same time when the retaining pin 27 is spatially fixed .
  • the locking cam can also be formed by a special, preferably made of plastic, additional part 50, which is correspondingly pushed onto a one or two-layer leaf spring and fixed in the position corresponding to the mode of action of the locking.
  • additional part 50 which is correspondingly pushed onto a one or two-layer leaf spring and fixed in the position corresponding to the mode of action of the locking.
  • the springs do not require any special lateral fixation. Only the additional cam must be guided laterally around the depth of the recesses with slight play.
  • FIGS. 8, 8A and 9 show an advantageous further development of the overall visor, especially from the point of view of the supply of spare parts. As already explained at the beginning, it is important that a visor disk can be exchanged quickly and without problems. 19 in accordance with FIGS. 8, 8A and 9 shown, to mount an additional securing plate 60 on the bearing piece by clipping, gluing, welding or the like. By means of two fastening screws 14 'and 14 ⁇ , the entire visor device can be attached to the helmet.
  • the springs can have different dimensions on both sides of the helmet.

Landscapes

  • Helmets And Other Head Coverings (AREA)

Abstract

Le casque décrit comporte une visière (2) recouvrant l'ouverture de vision, qui est montée pivotante et latéralement sur la coque du casque et, au moins dans sa position fermée, est encliquetable au moyen d'un dispositif d'encliquetage comprenant un ergot d'encliquetage et un élément d'encliquetage (18) pourvu au moins d'un évidement d'encliquetage (22), ainsi qu'un élément élastique (23, 24) serrant l'un contre l'autre l'ergot et l'élément d'encliquetage en direction du point de rotation de la visière. L'élément d'encliquetage (18) ou l'ergot d'encliquetage (31) est monté pivotant avec la visière. L'évidement d'encliquetage (22) de l'élément d'encliquetage (18) affecté à la position de fermeture est décalé de manière telle que l'ergot d'encliquetage (31) exerce sur la paroi latérale dudit l'évidement (22) et ainsi sur la visière (2) une précontrainte dans le sens de fermeture. On obtient ainsi un meilleur blocage de la visière (2) en position fermée, qui résiste même à une pression importante du vent (vitesse plus élevée), également lorsque l'on tourne la tête.

Claims (17)

1. Casque de protection, notamment pour motocycliste, comportant une visière couvrant l'ouverture pour le visage et qui est montée latéralement sur la coque du casque, de manière à pouvoir pivoter et peut être encliquetée, au moins dans sa position fermée, au moyen d'un dispositif d'encliquetage, qui est constitué par un ergot d'encliquetage et par un élément d'encliquetage pourvu d'au moins un évidement d'encliquetage, ainsi que par un élément de ressort qui serre l'un contre l'autre l'ergot d'encliquetage et l'élément d'encliquetage en direction du centre de rotation de la visière, et dans lequel l'évidement d'encliquetage (22), associé à la position de fermeture, de l'élément d'encliquetage (18) est décalé de telle sorte que la came d'encliquetage (31) exerce sur la paroi latérale de l'évidement d'encliquetage (22) et par conséquent sur la visière (2) une force de précontrainte dans la direction de fermeture, caractérisé par le fait que l'élément de ressort (23, 24, 40, 41) est réalisé sous la forme d'un ressort à lame à plusieurs couches, la lame de ressort la plus haute (41), tournée vers l'élément d'encliquetage (18) portant la came d'encliquetage (31).
2. Casque de protection suivant la revendication 1, caractérisé par le fait que la came d'encliquetage est maintenue de manière à être déplaçable sur les ressorts à lame.
3. Casque de protection suivant la revendication 1, caractérisé par le fait que pour la production de la force de précontrainte, un déplacement des points d'attaque de la came d'encliquetage (31) sur toute la longueur d'une surface en rampe de l'évidement à encliquetage (22) correspond à une plage angulaire de pivotement (α) de la visière (2) comprise entre 5° et 15°, mais de préférence égale à 8°.
4. Casque de protection suivant l'une des revendications 1 à 3, caractérisé par le fait que l'angle (β), que fait la direction de la force de l'élément de ressort (23) en direction du point de pivotement et la direction de la force exercée par le flanc de la came d'encliquetage (31), est comprise entre environ 25° et 45°, mais est égale de préférence à 35°.
5. Casque de protection suivant la revendication 4, caractérisé par le fait qu'au moins la lame de ressort portant la came d'encliquetage (31) et associée à l'élément d'encliquetage est bloquée contre tout déplacement dans la direction longitudinale, de préférence grâce à la présence d'un coudage d'une extrémité.
6. Casque de protection suivant l'une des revendications 4 ou 5, caractérisé par l'utilisation de ressorts d'encliquetage métalliques.
7. Casque de protection suivant l'une des revendications 4 à 6, caractérisé par le fait que le ressort à lame à couches multiples est fabriqué d'un seul tenant à partir d'une lame de ressort repliée à ses extrémités.
8. Casque de protection suivant l'une des revendications 4 à 7, caractérisé par le fait que les différentes lames du ressort à lame à couches multiples possèdent des épaisseurs et/ou des largeurs différentes.
9. Casque de protection suivant l'une des revendications précédentes, caractérisé par le fait qu'au moins un élément d'encliquetage situé sur l'un des côtés du casque est réalisé sous la forme d'une barrette cintrée d'encliquetage (46), qui est disposée sur la face intérieure de la visière (2) et coopère avec la came d'encliquetage élastique ménagée dans sa zone de pivotement.
10. Casque de protection suivant la revendication 9, caractérisé par le fait qu'au moins l'une des surfaces latérales de la coque (1) du casque possède, dans la partie dans laquelle la visière (2) est montée, un évidement (42) entourant à distance la barrette cintrée d'encliquetage (46), et que les lames de ressorts (40, 41) sont maintenues dans des encoches correspondantes dans l'évidement (42).
11. Casque de protection suivant l'une des revendications précédentes, caractérisé par le fait qu'une plaque de sécurité (60), servant à retenir les éléments individuels du dispositif de support et du dispositif d'encliquetage sur la visière contre toute perte lors du transport, est installée respectivement sur les faces intérieures de la visière (2).
12. Casque de protection suivant la revendication 11, caractérisé par le fait qu'après son montage préalable, la plaque de sécurité (60) est raccordée à l'élément de support par encliquetage, collage, soudage ou analogue.
13. Casque de protection suivant l'une des revendications précédentes, caractérisé par le fait que l'élément de support et d'encliquetage est réuni à la visière (2) pour former une unité de construction.
14. Casque de protection suivant l'une des revendications précédentes, caractérisé par le fait que l'élément de support et d'encliquetage possède une partie saillante en forme de segment circulaire, sur le pourtour duquel sont ménagés les évidements d'encliquetage (22).
15. Casque de protection suivant l'une des revendications précédentes, caractérisé par le fait que les évidements d'encliquetage (22) de l'élément d'encliquetage, prévus pour les positions d'extrémité de la visière (2), sont plus profonds que les autres évidements d'encliquetage.
16. Casque de protection suivant l'une des revendications précédentes, caractérisé par le fait que l'élément de support et d'encliquetage est réalisé sous la forme d'un composant séparé et peut être inséré au moyen d'un ou plusieurs appendices saillants moulés, dans des évidements correspondants de la visière (2).
17. Casque de protection suivant l'une des revendications précédentes, caractérisé par le fait que les parties d'encliquetage et de support pour les deux côtés du casque de protection sont agencées d'une manière symétrique.
EP87907500A 1986-11-17 1987-11-17 Casque de protection a visiere pivotante et encliquetable, notamment pour motocylistes Expired - Lifetime EP0289569B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87907500T ATE65166T1 (de) 1986-11-17 1987-11-17 Schutzhelm, mit einer schwenk- und rastbaren visiereinrichtung insbesondere fuer motorradfahrer.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19863639261 DE3639261A1 (de) 1986-11-17 1986-11-17 Sturzhelm mit einer schwenk- und rastbaren visiereinrichtung
DE3639261 1986-11-17
DE8708787U 1987-06-24
DE8708787U DE8708787U1 (de) 1987-06-24 1987-06-24 Schutzhelm, insbesondere für Motorradfahrer

Publications (2)

Publication Number Publication Date
EP0289569A1 EP0289569A1 (fr) 1988-11-09
EP0289569B1 true EP0289569B1 (fr) 1991-07-17

Family

ID=25849461

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87907500A Expired - Lifetime EP0289569B1 (fr) 1986-11-17 1987-11-17 Casque de protection a visiere pivotante et encliquetable, notamment pour motocylistes

Country Status (7)

Country Link
US (1) US5091997A (fr)
EP (1) EP0289569B1 (fr)
JP (1) JP2655532B2 (fr)
CN (1) CN1022086C (fr)
AU (1) AU8274687A (fr)
DE (1) DE3771494D1 (fr)
WO (1) WO1988003766A1 (fr)

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Also Published As

Publication number Publication date
JPH01501404A (ja) 1989-05-18
DE3771494D1 (de) 1991-08-22
WO1988003766A1 (fr) 1988-06-02
EP0289569A1 (fr) 1988-11-09
AU8274687A (en) 1988-06-16
US5091997A (en) 1992-03-03
CN87107912A (zh) 1988-05-25
CN1022086C (zh) 1993-09-15
JP2655532B2 (ja) 1997-09-24

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