EP0838172A2 - Boucle à ouverture rapide pour sangles de casques moto, cyclo et équivalents - Google Patents

Boucle à ouverture rapide pour sangles de casques moto, cyclo et équivalents Download PDF

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Publication number
EP0838172A2
EP0838172A2 EP97116789A EP97116789A EP0838172A2 EP 0838172 A2 EP0838172 A2 EP 0838172A2 EP 97116789 A EP97116789 A EP 97116789A EP 97116789 A EP97116789 A EP 97116789A EP 0838172 A2 EP0838172 A2 EP 0838172A2
Authority
EP
European Patent Office
Prior art keywords
bayonet
button
release
coupling
buckle
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.)
Withdrawn
Application number
EP97116789A
Other languages
German (de)
English (en)
Other versions
EP0838172A3 (fr
Inventor
Paolo Collini
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.)
Collini Demetrio SpA
Original Assignee
Collini Demetrio SpA
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 IT96MI002031 external-priority patent/IT1284915B1/it
Priority claimed from IT97MI000175 external-priority patent/IT236527Y1/it
Application filed by Collini Demetrio SpA filed Critical Collini Demetrio SpA
Publication of EP0838172A2 publication Critical patent/EP0838172A2/fr
Publication of EP0838172A3 publication Critical patent/EP0838172A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/2592—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts fastening by sliding in the main plane or a plane parallel to the main plane of the buckle
    • 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
    • A42B3/08—Chin straps or similar retention devices

Definitions

  • the present invention relates to a quick-release buckle for full-face and open-front helmets for motorcyclists, cyclists and for similar uses, particular but not exclusively suitable to be arranged halfway along the chin- strap.
  • current buckles for helmets for motorcyclists and the like are manufactured in the form of a flattened prism-shaped body and can be actuated by means of a single release button or by means of two opposite buttons which can be operated simultaneously.
  • buckles The internal structure of these buckles is usually constituted by elements which allow the coupling and release of a flat tongue with an eyelet-shaped head, which bears the strap to be coupled to the buckle and is often termed "bayonet" because it can be inserted with a snap-together action in a slot formed in the box-like body that encloses the coupling and release mechanism.
  • the eyelet-shaped head of the bayonet is locked inside the body of many helmet buckles by coupling the eyelet of the head with a hook or lug which protrudes from the base of the box-like body and by retaining it by means of elements which can shift in contrast with preloaded springs, whose function is to keep the coupling stable and allow, by means of the translatory motion of a button, said fixed hook to exit from the eyelet of the bayonet head and said bayonet to be simultaneously expelled from the body of the buckle.
  • buckles generally meet the legal standards as regards coupling stability and pulling strength, in practice they are mainly suitable to be arranged laterally to the helmet user's face; if they are instead placed halfway along the chin-strap, said buckles entail significant drawbacks, especially difficulties in release.
  • the most recent standards (ECE 22:04 standards) in fact require a very specific opening force (no more than 3 kg), require said buckles to be applied under the chin, and subject the test head and helmet to intense pulling; according to these standards, the test head has a substantially square jaw, so that the straps of the buckle are subjected to traction in an almost horizontal direction; accordingly, the high traction force requires in practice a considerable effort in order to shift the opening button, and for these same reasons the slot of the bayonet tends to be retained on the end of the fixed hook even when the button is shifted into the opening position.
  • chin-strap buckles which have an inclined bayonet, which in practice reduces the opening forces; the inclination of the bayonet is provided by forming a raised portion between the internal plane of the buckle body and the surface that faces said bayonet. This raised portion allows the bayonet to behave during opening, i.e., while it is being pulled, like a lever whose fulcrum lies on said fixed raised portion, so that by partially rotating it releases the slot of said bayonet from the locking raised portion.
  • the aim of the present invention is to provide a buckle for use in the middle region of chin-straps in particular and for other uses in general, designed and structured so as to completely obviate the drawbacks and limitations of the various buckles for helmets and the like, such that it fully complies with the prescriptions of the most recent Standards concerning chin-strap buckles, and most of all allows quick and safe release for opening without requiring efforts beyond prescribed values.
  • an object of the present invention is to provide a buckle of the above type which is structured so as to be very compact and therefore lighter than current chin-strap buckles, with evident practical and economical advantages.
  • Another object of the present invention is to provide a buckle which is structurally simple and highly reliable and allows bayonet release in any operating condition, including use in chin-straps for people with chins smaller than those normally present in adults.
  • Another object of the present invention is to allow safe release of the bayonet also by users wearing gloves on their hands.
  • a quick-release buckle particularly suitable for arrangements halfway along a chin-strap of helmets for motorcyclists, cyclists and the like and for other uses, of the type comprising: a box-like containment body; a metal plate with longitudinal edges folded in the shape of the letter U and provided at one end with an eyelet for coupling to a strap portion which is rigidly coupled to the helmet; a bayonet having, at one end, an eyelet for coupling to the other strap portion and, at the opposite end, a slot which is suitable to engage a fixed raised portion which protrudes from said metal plate; and a button, which is arranged in opposition to return springs and can shift within said box-like body in order to actuate means suitable to allow the release of the bayonet from said raised portion; said quick-release buckle being constituted, according to the present invention, by a metal plate with an eyelet for fixed coupling to the strap and with longitudinal edges which are folded inwardly substantially in the shape of
  • said raised portion or protrusion having a curved surface is constituted by a half-cylinder which is formed in said metal plate or applied thereto so that its axis is arranged transversely to said plate and has, on the side directed toward the inlet of the bayonet, a blending portion which is shaped like an inclined plane and is suitable to facilitate the entry of a slot formed in the bayonet during coupling thereof.
  • said hole formed in said metal plate is provided with a substantially circular or rectangular shape and has dimensions chosen so as to accommodate and stably retain inside it a dome or protrusion which is substantially hemispherical or semicylindrical and is rigidly coupled to the lower face of the end of said flat bayonet.
  • said button has, on its two longitudinal sides, portions of tabs which protrude from the button body and are suitable to form, together with two underlying straight protrusions which protrude from the button body, two U-shaped parallel guides which are meant to internally accommodate the upper horizontal edge of said wings that protrude from the metal plate and thus allow the button to slide in both directions without vertical and lateral swaying or excessive friction between the parts in mutual contact.
  • said button return spring is inserted with one end in a hole formed centrally in the button body and, with its opposite end, in a protrusion formed correspondingly in the vertical rear inner part of said upper box-like body.
  • the buckle according to the present invention is constituted, according to a first embodiment, by the assembly of a metal plate 1 having, at one end, an expansion which includes a conventional slot or eyelet 1a which is meant to be stably connected in a conventional manner to the end of a strap portion which is rigidly coupled to a helmet (not shown).
  • Said plate has two opposite wings 1b which are folded upwardly and then inwardly, so as to form two flaps 1c which are parallel to the base plate 1; said flaps 1c are meant to constitute two planes or guides for the sliding of an actuation button, as will become apparent hereinafter.
  • Said metal plate 1 is furthermore enclosed within a flat box-like body 2 which is open at the front, as shown by 2a, and then stably closed in a downward region by a cover 3 by conventional means, such as gluing, ultrasound welding or the like.
  • the buckle also comprises an actuation button, generally designated by the reference numeral 4, which has a raised portion 4a for actuation, a central flat body 4b and two lateral flaps 4c which protrude outward and are meant to slide on the upper face 1c of the folded wings 1b of the metal plate 1; the central body 4b of the button 4 also has two identical blocks 4d, above which there are provided two opposite and identical steps 4e which are parallel to the upper flaps 1c and are meant to slide on the underlying face of the flaps 1c of the plate 1, as shown in cross-section in figure 2a.
  • an actuation button generally designated by the reference numeral 4 which has a raised portion 4a for actuation, a central flat body 4b and two lateral flaps 4c which protrude outward and are meant to slide on the upper face 1c of the folded wings 1b of the metal plate 1; the central body 4b of the button 4 also has two identical blocks 4d, above which there are provided two opposite and identical steps 4e which are parallel to the upper flaps
  • a cylindrical blind hole 5 is formed between said two blocks 4d of the button and loosely accommodates one end of a cylindrical spiral spring 6; said blocks 4d have a depressed region which is suitable to form a front step 7 (figures 2-3), against which the end of a flat bayonet 8, which is of a known kind but is flat and elongated, is meant to strike and push, loading the spring 6 against the bottom of the hollow body 2, where the opposite end of said spring 6 is inserted in a suitable seat 9.
  • the buckle also has, as a means for coupling and retaining the eyelet 8b of the bayonet, a raised portion or protrusion 10 which has a curved surface and whose dimensions are such as to assume the shape of a half-cylinder or of a hemisphere.
  • the angle "i" formed by the vertical tangent plane that passes through the (generatrix) line 10a of contact between the metal plate 1 and said line of contact must be 90 o , in order to allow the transverse base edge 8a of the eyelet 8b of the bayonet to remain stably in contact with the raised portion 10 when the bayonet 8 is in closed position, as clearly shown by figure 3.
  • an inclined plane 10a which is suitable to facilitate the entry of the bayonet during engagement on the raised portion 10.
  • Assembly of the buckle therefore entails the initial insertion of the spring 6 between the hole 5 of the button and the eyelet or hook 9 of the box-like body 2, then the insertion of the slots of the button 4, formed by the flaps 4c and by the steps 4e, along the C-shaped edges 1c of the metal plate 1 and the free sliding of the button until its front end 11 abuts against two lugs 2b (figure 3) provided at the open ends of the upper box-like body 2.
  • Figure 2 shows, in a median longitudinal sectional view, the buckle in assembled form and in the position for release from the bayonet 8, wherein the button is retained against said lugs 2b and its flat underlying surface 12 is practically in contact with the cylindrical lug 10.
  • the movement of the cylinder or raised portion 10 as much as possible toward the fixed rear eyelet 1a of the plate 1 and the greater length (with respect to conventional buckles) of the flat bottom 12 of the button allow in practice, in addition to the safety of the locking of the bayonet, the advantage of allowing the button, during release, to shift under the thrust of the spring without swaying laterally and therefore with minimal friction, and of allowing the end of said bayonet not to jam against the front free end of the plate 1 or in any case not to be slowed down during extraction due to the traction at an angle of the strap during release, since said bayonet is inclined only slightly because of its greater length.
  • Bayonet release occurs by pressing on the button so as to move its flat bottom 12 out of engagement with respect to the raised portion 10; when said disengagement has been achieved, the curvature of the raised portion 10 facilitates, under the pulling action of the strap, the exit of the eyelet 8b of the bayonet without jammings.
  • the button then simultaneously returns into the position in which it is retained against the lugs 2b of the box-like body.
  • the opening 2a of the front part of the box-like body 2 also allows the user to easily operate the button even if he is wearing gloves, as usually occurs for motorcyclists.
  • the buckle is also provided as shown in figures 4 to 8; in this solution, the system for the coupling and quick release of the bayonet from the metal plate 1 consists in using a bayonet 8 with a single eyelet 8c for adjustable coupling to the strap portion that is rigidly coupled to the helmet; it is constituted by a flat lamina, at the free end whereof, and on the median longitudinal axis whereof, there is provided a protrusion 13 which, according to a first embodiment, is constituted by a hemisphere or hemispherical dome which protrudes from the lower face of the bayonet and is arranged as close as possible to the free end of said bayonet.
  • the stable coupling of the bayonet to the lamina 1 is also ensured by the return of the button 4 to the stable locking position and more specifically by the overlap on the bayonet (at the hemisphere) of the central body 4b of the button (figure 4).
  • the bayonet 8 can be locked, as shown by figure 8, by anchoring at the end of the bayonet a half-cylinder 13a which is arranged so that its axis is arranged transversely to the bayonet and by providing, in the metal plate 1, a through or blind rectangular cavity 14a.
  • Said hemispherical protrusion 13 (and the semicylindrical one 14a) can be provided by drawing the bayonet or by welding said protrusion 13 to the face of the bayonet.
  • a very shallow blending portion is interposed between the flat surface of the lamina 1 and the circular edge of the hemisphere (or rectangular peripheral edge of the half-cylinder); for example, in the case of the hemisphere, said blending portion is tubular, as shown by 15 in figure 6; said blending portion 15 is arranged at right angles to the metal lamina 1 and allows, in this position, to maintain the mutual stable contact of two cylindrical arc portions which are perpendicular to the direction of translatory motion of the bayonet: more specifically, a portion of arc which is constituted by the thickness 14b of the hole 14 of the lamina and an arc-shaped part of the blending portion 13b which is in contact therewith, when the bayonet is inserted and tensioned; this prevents any small plays or movements of the bayonet with respect to the metal lamina from triggering an initial escape of the hemisphere from its coup
  • Figure 2 is a median longitudinal sectional view of the buckle according to the present invention in the assembled condition and in the position for release from the bayonet 8, wherein the button is retained against lugs 2b and its underlying flat surface 4d is practically above the retention hole 14.
  • the shifting of the position of the hemisphere 13 as close as possible to the fixed eyelet 1a of the plate 1, and the greater length (with respect to conventional buckles) of the locking plane 4d (figure 4) of the button also allow in practice the button to move under the thrust of the spring without lateral swaying and therefore with minimal friction, and allow the end of the bayonet not to jam on the front free end of the plate 1 or in any case not to be slowed down as it exits due to the inclined traction of the strap during release, since said bayonet is inclined only slightly because of its greater length.
  • the bayonet is released, in this case too, by pressing on the button so as to disengage its flat bottom 14d from the coupling region; when release is achieved, the curvature of the hemisphere 13 facilitates, under the traction of the strap, the exit of said hemisphere from the hole 14 of the plate 1 without jamming.
  • the button then returns simultaneously to the position for retention against the lugs 2b of the box-like body.
  • a hemisphere or a half-cylinder that protrudes from one side of the bayonet, it allows said bayonet to be inserted in the buckle body only if it is kept in a single position, i.e., the position in which the hemisphere is directed toward the plane of the flat lamina 1, otherwise the hemisphere would of course not encounter the corresponding hole and coupling would therefore be impossible.
EP97116789A 1996-10-02 1997-09-26 Boucle à ouverture rapide pour sangles de casques moto, cyclo et équivalents Withdrawn EP0838172A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT96MI002031 IT1284915B1 (it) 1996-10-02 1996-10-02 Fibbia a sgancio rapido per cinturini di caschi di motociclisti ciclisti e per impieghi simili
ITMI962031 1996-10-02
IT97MI000175 IT236527Y1 (it) 1997-03-11 1997-03-11 Fibbia a sgancio rapido perfezionata,particolarmente per cinturinidi caschi per motociclisti,ciclisti e per impieghi analoghi
ITMI970175U 1997-03-11

Publications (2)

Publication Number Publication Date
EP0838172A2 true EP0838172A2 (fr) 1998-04-29
EP0838172A3 EP0838172A3 (fr) 1998-12-09

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Application Number Title Priority Date Filing Date
EP97116789A Withdrawn EP0838172A3 (fr) 1996-10-02 1997-09-26 Boucle à ouverture rapide pour sangles de casques moto, cyclo et équivalents

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT513155B1 (de) * 2012-11-29 2014-02-15 Condor Guertel Gmbh Gürtel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1294259A (fr) * 1961-04-13 1962-05-26 Boucle perfectionnée adaptable aux ceintures de sécurité pour automobilistes et ceintures munies de cette boucle
US3127655A (en) * 1960-02-23 1964-04-07 Andrew G Carter Slide-action buckle for safety belts
US3399431A (en) * 1967-04-17 1968-09-03 Superior Industries Safety seat belt buckle
DE2250038A1 (de) * 1972-10-10 1974-04-18 Sitam Societa Ind Telai Automa Einrastschloss fuer sicherheitsgurte
US4744134A (en) * 1985-11-20 1988-05-17 Aciers Et Outillage Peugeot Safety belt buckle, particularly for automobiles
GB2287745A (en) * 1994-03-25 1995-09-27 Mario Trebisacce Fastening means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127655A (en) * 1960-02-23 1964-04-07 Andrew G Carter Slide-action buckle for safety belts
FR1294259A (fr) * 1961-04-13 1962-05-26 Boucle perfectionnée adaptable aux ceintures de sécurité pour automobilistes et ceintures munies de cette boucle
US3399431A (en) * 1967-04-17 1968-09-03 Superior Industries Safety seat belt buckle
DE2250038A1 (de) * 1972-10-10 1974-04-18 Sitam Societa Ind Telai Automa Einrastschloss fuer sicherheitsgurte
US4744134A (en) * 1985-11-20 1988-05-17 Aciers Et Outillage Peugeot Safety belt buckle, particularly for automobiles
GB2287745A (en) * 1994-03-25 1995-09-27 Mario Trebisacce Fastening means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT513155B1 (de) * 2012-11-29 2014-02-15 Condor Guertel Gmbh Gürtel
AT513155A4 (de) * 2012-11-29 2014-02-15 Condor Guertel Gmbh Gürtel

Also Published As

Publication number Publication date
EP0838172A3 (fr) 1998-12-09

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