EP0796568B1 - Verstellmechanismus für Bänder, insbesondere Stirnbänder - Google Patents

Verstellmechanismus für Bänder, insbesondere Stirnbänder Download PDF

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Publication number
EP0796568B1
EP0796568B1 EP97104847A EP97104847A EP0796568B1 EP 0796568 B1 EP0796568 B1 EP 0796568B1 EP 97104847 A EP97104847 A EP 97104847A EP 97104847 A EP97104847 A EP 97104847A EP 0796568 B1 EP0796568 B1 EP 0796568B1
Authority
EP
European Patent Office
Prior art keywords
section
housing
gripping
braking
adjusting knob
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
EP97104847A
Other languages
English (en)
French (fr)
Other versions
EP0796568A1 (de
Inventor
Christian. P. Walter
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.)
HTS Hans Torgersen and Sonn AS
Original Assignee
HTS Hans Torgersen and Sonn AS
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
Application filed by HTS Hans Torgersen and Sonn AS filed Critical HTS Hans Torgersen and Sonn AS
Publication of EP0796568A1 publication Critical patent/EP0796568A1/de
Application granted granted Critical
Publication of EP0796568B1 publication Critical patent/EP0796568B1/de
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
    • A42B3/10—Linings
    • A42B3/14—Suspension devices
    • A42B3/145—Size adjustment devices

Definitions

  • the invention concerns an adjusting mechanism for bands, especially head-bands, comprising a housing and a band with a longitudinal slit at each end, wherein each of the slits has a row of teeth on sides opposite each other, and wherein the slits overlap each other inside the housing, and wherein there is further provided an adjusting knob with a cogwheel engaged with the slits' teeth inside the housing and a gripping part outside the housing for manual rotation of the cogwheel about the adjusting knob's axis.
  • Adjusting mechanisms for bands are used amongst other things in helmets of different kinds, such as cycle helmets, work helmets and ice hockey helmets, where a band which is fastened inside the helmet fits around the head and keeps the helmet in place.
  • Bands which are used in helmets can have different adjusting mechanisms, the simplest of which consists of a band which is provided with studs or pins in an area where the ends of the band overlap each other at one end, and at the other end there are corresponding holes, with the result that the length of the band can be varied with different combinations of pins and holes.
  • the band may also be provided with buckles, which come in a variety of different forms.
  • US 3 329 968 describes a helmet with a band where rows of teeth in longitudinal slits in overlapping end sections of the band are gripped by a cogwheel on an adjusting knob provided in a holder or a housing.
  • This mechanism can be operated with one hand, but it has no device which secures the ends of the band after the adjustment, with the result that the band will slide out of the adjusted position when the adjusting knob is released by the user.
  • US 5,357,654 describes a strap for a diving mask built similarly to the above described helmet-band.
  • US 5, 357, 654 contitutes the closest prior art and serves as a basis for the preamble of claim 1.
  • This strap overcomes the deficiency of US 3,329,968 by providing a check device that comprises a latch button and a spring disposed in a check catch seat.
  • the latch button has a protruding pin at its front end.
  • the spring is arranged between the back wall of the check catch seat and the rear end of the latch button so that the elastic force of the spring keeps the latch button in a state of displacing forward, namely, to keep the protruding pin extending into any of the plurality of tooth recesses on a adjusting knob that is in coaxial contact with the cogwheel.
  • the front end of the protruding pin has a unidirectional inclined plane which promise the adjusting knob to turn in only one direction when the protruding pin is engaged. This, however, leads to the disadvantage that the described strap can only be loosened using two hands.
  • DE 4 022 422 describes an adjustable headband, especially for helmets, where the adjustment can be performed with one hand, substantially in the same way as in US 3 329 968, but where in addition the mechanism has a pin which engages with the adjusting knob's cogwheel.
  • the object of the invention is to provide an adjusting mechanism for bands, especially headbands, which is not encumbered by the above-mentioned drawbacks, which adjusting mechanism should be able to be operated manually, and should be designed so as to permit the use of reasonably priced construction materials, preferably thermoplastic.
  • Fig. 1 illustrates an adjusting mechanism 1 for bands, especially headbands, comprising a housing 2 and a band 3 with a longitudinal slit 4 at each end, where each of the slits 4 has a row of teeth 5 at sides opposite each other.
  • An adjusting knob 6, of which only a gripping part 8 is visible in fig. 1, can be rotated manually with one hand in order to adjust the length of the band 3.
  • Fig. 1 also illustrates two protrusions 12 which project from the housing 2, whose function will be described in more detail in the following.
  • the headband can be used to secure a helmet around the head, the band being fastened to the inside of the helmet in positions along the band. This is prior art and will not be described further.
  • Fig. 2 illustrates the housing 2 viewed from the side, where the shape of the adjusting knob's 6 gripping part 8 and the protrusions 12 can be seen more clearly. Also illustrated here is a recess 20 between the section which constitutes the abutment for the adjusting knob's gripping part 8 and the protrusion or the protrusions 12.
  • the housing's 2 upper surface is a circular surface, with the result that due to the recess 20 the housing 2 becomes elastically yielding in the area of the recess, thus giving the protrusion or the protrusions 12 an elastic attachment in the housing.
  • the braking section 9 consequently has an elastic abutment against the gripping section 10.
  • Fig. 3 illustrates the adjusting knob 6 from the side. It can be seen here how the adjusting knob consists of two integrated parts, a gripping part 8 and a cogwheel 7. During adjustment of the mechanism the gripping part 8 is gripped with one hand, usually between the thumb and index finger, and is rotated in such a manner that the cogwheel 7 is rotated correspondingly.
  • the adjusting knob's gripping part 8 is in the form of a flat disc 15, with a gripping surface 14 for the fingers arranged along the circumference. Also illustrated is a gripping section 10, which in this embodiment of the gripping part is identical to the gripping surface 14, and which will be discussed in more detail in the following.
  • Fig. 4 is a cross section through the housing 2 along the intersecting line IV-IV in fig. 1.
  • the band is omitted in order to make the figure clearer.
  • the adjusting knob's 6 gripping part 8 in the form of a disc 15 is arranged on the outside of and abuts against an upper section of the housing 2, with the cogwheel 7 arranged inside the housing.
  • the cogwheel 7 is secured in the axial direction by a washer 16 and a screw 17 placed in a recess 18 in a lower opposite section of the housing 2.
  • the protrusions 12 abut against the circumference of the disc 15.
  • Fig. 5 is a cross section through the housing 2 along the intersecting line V-V in fig. 2.
  • the actual housing is omitted here for reasons of clarity. It can be seen here how one end 3 of the band with a longitudinal slit 4 with a row of teeth 5 overlaps an end 3' with a longitudinal slit 4' with an opposite row of teeth 5'.
  • the cogwheel 7 is located between the rows of teeth, in engagement therewith, with the result that a rotation of the cogwheel leads to a movement of the rows of teeth 5, 5' in relation to each other and consequently the ends 3, 3' of the band in the band's longitudinal direction.
  • Fig. 6 illustrates the adjusting knob's gripping part 8 and the protrusion 12 in closer detail.
  • the protrusion 12 has a braking section 9 in the form of grooves, ridges or teeth 11, which engage with corresponding grooves, ridges or teeth 11 which are arranged in a circular gripping section 10 on the gripping part 8.
  • the gripping section's teeth point radially outwards from the adjusting knob's axis 19, and the braking section's teeth point radially inwards towards the axis, the braking section having a curvature which corresponds to the gripping section's curvature.
  • the housing has a braking section on each side of the adjusting knob, with the result that the braking sections are arranged symmetrically about the adjusting knob's axis. This has the effect that radially corresponding forces which are exerted by the two braking sections on the adjusting knob balance each other.
  • Fig. 7 illustrates an alternative embodiment not covered by the claims.
  • the adjusting knob's gripping part 8 is designed with a wing-shaped ridge 13, the gripping surfaces 14 for the fingers being formed from the ridge's lateral surfaces.
  • the gripping section 10 is in the form of axial teeth or grooves 11 and arranged along the gripping part's outer edge, for engagement with corresponding braking sections 9 on the housing (not shown).
  • the braking section 9 When the gripping part 8 is rotated the braking section 9 will exert a rotation-impeding force on the gripping section 10, directed towards the gripping part's direction of rotation, which rotation-impeding force secures the mechanism during use of the helmet.
  • the rotation-impeding force must be so great that forces which are exerted on the gripping part from the cogwheel due to tension in the band, which can be due to accelerations, impact and other random external influences, do not overcome the rotation-impeding force, thus causing the gripping part to rotate and the band to slacken.
  • the rotation-impeding force must not be greater than that which can be overcome by the user when exerting a reasonable amount of force during adjustment of the mechanism.
  • the forces which act between the cogwheel's teeth and the band's rows of teeth is a result of conditions which are associated with the use of the band, and will thus be approximately the same independently of the design of the mechanism which ensures that the band is secured .
  • the braking section and the gripping section are provided at the outer edge of the gripping part. This ensures that both the rotation-impeding force and the force which is exerted by the user when adjusting the helmet have a large torque arm in relation to the torque arm of the forces which act between the cogwheel's teeth and the band's rows of teeth.
  • the invention Compared with the adjusting mechanism which is described in DE 4 022 422, where the rotation-impeding force acts on the cogwheel and has a torque arm which is as great as or less than the forces which act between the cogwheel's teeth and the band's rows of teeth, in similar geometric conditions associated with the band's rows of teeth and the cogwheel's diameter, the invention therefore provides an adjusting mechanism where the rotation-impeding force can be much smaller.
  • the braking section and the gripping section which are moved in relation to each other during adjustment of the mechanism and thus are highly subject to wear, will be the critical part of the mechanism with regard to the choice of materials.
  • the above-mentioned conditions associated with the required size of the rotation-impeding force mean that the braking section and the gripping section can be designed in such a manner that the forces between them are relatively small, which in turn means less wear.
  • the parts of the mechanism can therefore be designed in a reasonably priced material with low wear durability, such as a thermoplastic, which is inexpensive and easy to shape.
  • a thermoplastic which is inexpensive and easy to shape.
  • the entire mechanism can thereby be made of thermoplastic, for example polypropylene, which is a great advantage with regard to recycling of the material.
  • the braking section and the gripping section are in the form of grooves, ridges or teeth, as this is assumed to be the most favourable design, but it is also possible to design these section in other ways, since any design which generates a force between the braking section and the gripping section can be employed in the invention.
  • braking section or the braking sections are referred to and illustrated in connection with protrusions provided on the housing.
  • the braking sections in other ways, for example as lateral surfaces in a recess for the gripping part.

Landscapes

  • Helmets And Other Head Coverings (AREA)
  • Magnetic Treatment Devices (AREA)
  • Buckles (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Claims (7)

  1. Verstellmechanismus (1) für Bänder, insbesondere für Stirnbänder, umfassend ein Gehäuse (2) und ein Band (3) mit einem Längsschlitz (4) an jedem Ende, wobei jeder der Schlitze (4) eine Zahnreihe (5) auf einander gegenüberliegenden Seiten aufweist und wobei die Schlitze einander innerhalb des Gehäuses (2) überlappen und wobei des weiteren ein Verstellknopf (6) vorgesehen ist, mit einem Zahnrad (7), welches mit den Zähnen (5) des Schlitzes innerhalb des Gehäuses (2) in Eingriff steht, und einem Griffteil (8) außerhalb des Gehäuses für das händische Drehen des Zahnrads (7) um die Achse des Verstellknopfes (6), wobei das Gehäuse (2) zumindest einen Bremsabschnitt (9) aufweist, welcher in beiden Richtungen eine drehungshemmende Kraft auf einen entsprechenden kreisförmigen Griffabschnitt (10) auf dem Griffteil (8) des Verstellknopfes ausübt, wobei die Kraft groß genug ist, um das Zahnrad (7) in einer eingestellten Position zu sichern, dadurch gekennzeichnet, dass der Griffteil (8) die Gestalt einer flachen Scheibe (15) aufweist, wobei der Griffabschnitt (10) entlang dem Umfang der Scheibe (15) angeordnet ist und wobei der Griffabschnitt (19) zugleich eine Grifffläche (14) für das händische Drehen des Griffteils (8) darstellt.
  2. Verstellmechanismus nach Anspruch 1, dadurch gekennzeichnet, dass der Bremsabschnitt (9) und der Griffabschnitt (10) an der Außenkante des Griffteils (8) vorgesehen sind.
  3. Verstellmechanismus nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Griffabschnitt (10) und der Bremsabschnitt oder die Bremsabschnitte (9) mit ineinandergreifenden Nuten, Graten oder Zähnen (11) versehen sind.
  4. Verstellmechanismus nach Anspruch 3, dadurch gekennzeichnet, dass die Zähne des Griffabschnitts (10) von der Achse (19) des Verstellknopfes radial nach außen weisen und dass die Zähne des Bremsabschnittes oder der Bremsabschnitte (9) radial nach innen zur Achse des Verstellknopfes hin weisen.
  5. Verstellmechanismus nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Bremsabschnitt oder die Bremsabschnitte (9) in Vorsprüngen (12) vorgesehen sind, welche vom Gehäuse (2) vorstehen und eine Krümmung aufweisen, welche der Krümmung des Griffabschnittes (10) entspricht.
  6. Verstellmechanismus nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Bremsabschnitte (9) symmetrisch um die Achse des Verstellknopfes (19) angeordnet sind.
  7. Verstellmechanismus nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der obere Abschnitt des Gehäuses (2) eine Ausnehmung (20) zwischen dem Abschnitt, welcher ein Widerlager für den Griffteil (8) des Verstellknopfes darstellt, und dem Vorsprung oder den Vorsprüngen (12) aufweist, was dazu führt, dass das Gehäuse (2) an diesem Punkt elastisch nachgibt und der Vorsprung oder die Vorsprünge (12) eine elastische Befestigung im Gehäuse (2) aufweisen und der Bremsabschnitt (9) ein elastisches Widerlager gegen den Griffabschnitt (10) aufweist.
EP97104847A 1996-03-22 1997-03-21 Verstellmechanismus für Bänder, insbesondere Stirnbänder Expired - Lifetime EP0796568B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO961201A NO303422B1 (no) 1996-03-22 1996-03-22 Innstillingsmekanisme for bÕnd, sµrlig hodebÕnd
NO961201 1996-03-22

Publications (2)

Publication Number Publication Date
EP0796568A1 EP0796568A1 (de) 1997-09-24
EP0796568B1 true EP0796568B1 (de) 2001-07-25

Family

ID=19899184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104847A Expired - Lifetime EP0796568B1 (de) 1996-03-22 1997-03-21 Verstellmechanismus für Bänder, insbesondere Stirnbänder

Country Status (4)

Country Link
EP (1) EP0796568B1 (de)
AT (1) ATE203377T1 (de)
DE (2) DE29704739U1 (de)
NO (1) NO303422B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29905555U1 (de) 1999-03-26 1999-07-15 Krauter, Manfred, 01900 Bretnig-Hauswalde Trageeinrichtung für einen Helm
GB2362802B (en) * 2000-05-30 2003-12-03 Silenta Ltd Oy Head-band locking device
FR2836038B3 (fr) * 2002-02-15 2004-04-30 Salomon Sa Dispositif pour la mesure du tour de tete d'un etre humain
SE530530C2 (sv) * 2005-04-11 2008-07-01 Sport Atlas Ab Fixeringssystem för hjälm
DE102008020947B4 (de) * 2008-04-25 2015-02-19 Oped Ag Schutzhelm mit Helmgurt
CN103976858B (zh) * 2014-05-09 2016-05-04 深圳市倍轻松科技股份有限公司 头部按摩器及其头盔大小调节结构
CN109380817B (zh) * 2017-08-02 2021-05-04 宏碁股份有限公司 系带调整结构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325824A (en) * 1965-10-23 1967-06-20 Donegan Optical Co Inc Adjustable head band
US4942628A (en) * 1989-09-20 1990-07-24 Mine Safety Appliances Company Helmet suspension having ratchet adjustment
FR2687902B1 (fr) * 1992-02-27 1997-03-21 Petzl Ets Casque de securite a reglage du dispositif de maintien sur la tete.
DE4224476C2 (de) * 1992-07-24 1995-10-26 Optrel Ag Einrichtung zum Schutz des menschlichen Kopfes gegen äussere Einwirkungen
US5357654A (en) * 1993-03-19 1994-10-25 Hsing Chi Hsieh Ratchet diving mask strap

Also Published As

Publication number Publication date
DE29704739U1 (de) 1997-05-22
NO961201D0 (no) 1996-03-22
EP0796568A1 (de) 1997-09-24
NO303422B1 (no) 1998-07-13
NO961201L (no) 1997-09-23
DE69705757D1 (de) 2001-08-30
ATE203377T1 (de) 2001-08-15
DE69705757T2 (de) 2001-11-15

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