WO2017101975A1 - Headband and adjustment device and a safety helmet with such a device - Google Patents

Headband and adjustment device and a safety helmet with such a device Download PDF

Info

Publication number
WO2017101975A1
WO2017101975A1 PCT/EP2015/079662 EP2015079662W WO2017101975A1 WO 2017101975 A1 WO2017101975 A1 WO 2017101975A1 EP 2015079662 W EP2015079662 W EP 2015079662W WO 2017101975 A1 WO2017101975 A1 WO 2017101975A1
Authority
WO
WIPO (PCT)
Prior art keywords
headband
adjustment device
housing
locking element
locking
Prior art date
Application number
PCT/EP2015/079662
Other languages
French (fr)
Inventor
Ashish BABULAL
Original Assignee
Groupe Ls S.A.
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 Groupe Ls S.A. filed Critical Groupe Ls S.A.
Priority to PCT/EP2015/079662 priority Critical patent/WO2017101975A1/en
Publication of WO2017101975A1 publication Critical patent/WO2017101975A1/en

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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 relates to the field of safety helmets and more particularly to safety helmets for use in construction, manufacturing or industrial applications, and in particular to the parts, details or accessories of helmets and it has as its object a headband and adjustment device for safety helmet and a safety helmet provided of such a device.
  • Safety helmets are already known, such as safety helmet for construction, manufacturing or industrial workers, that each typically includes a hard shell portion, i.e. a head casing for taking impact, a lining portion such as headband or harness holding the helmet on the user's head and coupled to an adjustment mechanism for size fitment and retention.
  • the adjustment mechanism consists generally of a ratchet system such as a slip- ratchet or rotary ratchet.
  • Most existing adjustment mechanisms include a lower rear shell portion having a clutching mechanism that allows the user to manually adjust the size of headband to fit its head size and be retained firmly.
  • the adjustment system includes a strap that engages the adjustment mechanism and a flexible, durable and tough material that conforms to a wearer's head.
  • the main purpose of the adjustment mechanism is to have the helmet couple snugly around the user's head and be firmly retained during use.
  • This invention has as its object to remedy to at least one of these drawbacks by proposing a headband and adjustment device for safety helmet such as for construction, manufacturing or industrial workers, that make extremely fast adjustment possible in a single operation of hands, this with a manufacturing cost lower than the current systems and with least effort and time to adjust and retain the safety helmet on the head or release it than with said current systems.
  • the present invention has as its object a headband and adjustment device for safety helmet, said headband and adjustment device comprising an adjustable headband having a first strap portion and a second strap portion and an adjustment system for enlarging or tightening of the headband, said first strap portion being provided with an elongated slot delimited longitudinally by two longitudinal sides and at least a row of teeth extending along one of the latter and on one side of the plane of the slot, wherein the adjustment system comprises a housing including a front access opening and containing :
  • a push element capable to be moved in translation in a direction substantially perpendicular to the plane of the slot and comprising a rear pushing portion extending through the slot, a front operating portion located on the other side of the plane of the slot and being exposed through the front access opening,
  • a locking element including locking means and being capable to be moved in translation in said direction, under spring tension, into a locking position in which it is locked by engagement of the locking means with the teeth to prevent the enlarging or tightening of the headband and, under the pushing action of the push element via its pushing portion, into an unlocking position in which it is not engaged with said teeth to allow the enlarging or the tightening of the headband,
  • a guiding system for guiding in translation the push element and the locking element.
  • the present invention also has as its object a safety helmet more particularly for use in construction, manufacturing or industrial applications, comprising a protective hard shell capable of extending upon a surface region of the head of a person wearing the safety helmet, wherein it further comprises a headband and adjustment device according to this invention as described above.
  • a safety helmet more particularly for use in construction, manufacturing or industrial applications, comprising a protective hard shell capable of extending upon a surface region of the head of a person wearing the safety helmet, wherein it further comprises a headband and adjustment device according to this invention as described above.
  • FIG. 1 shows a perspective view of a headband and adjustment device for safety helmet according to the invention, in a view showing the front part of said device,
  • figure 2 shows a perspective view of the headband and adjustment device represented in figure 1, in a view showing the rear part of said device,
  • figure 3 shows a partial perspective view of the headband and adjustment device in front view such as represented in figure 1, when dismantled,
  • figure 4 shows a partial perspective view of the headband and adjustment device in a rear view such as represented in figure 2, when dismantled,
  • figure 5 shows a partial perspective view of the headband and adjustment device in a front view such as represented in figure 1, when dismantled, showing the inside of the housing,
  • figure 6 shows a perspective view of the push element represented in figure 1, in a front view
  • figure 7 shows a perspective view of the push element represented in figure 6, in a rear view
  • figure 8 shows a perspective view of the locking element represented in figure 1, in a front view
  • figure 9 shows a perspective view of the locking element represented in figure 6, in a rear view
  • FIG. 10 shows a perspective view of the front side housing of the housing represented in figure 1, in a front view
  • figure 11 shows a perspective view of the front part housing of the housing represented in figure 10, in a rear view showing its inner surface
  • figure 12 shows a perspective view of the rear part housing of the housing represented in figure 1, in a front view showing its inner surface
  • FIG 13 shows a perspective view of the first strap portion of the headband and adjustment device represented in figure 1, on the side of the slot comprising two rows of teeth 6a, 6b extending each alongside one of the sides delimiting said slot.
  • the figures show a headband and adjustment device, according to this invention, for safety helmet, said headband and adjustment device comprising an adjustable headband 1 having a first strap portion la and a second strap portion lb and an adjustment system 2, 3, 4, 5 for enlarging or tightening of the headband 1, said first strap portion la being provided with an elongated slot 10a delimited longitudinally by two longitudinal sides and at least a row of teeth 6a, 6b extending along one of the latter and on one side of the plane of the slot 10a.
  • the first strap portion la can comprise two rows of teeth 6a, 6b, one row of teeth 6a extending along one of the longitudinal sides and the other row of teeth 6b extending along the other longitudinal sides. Both rows of teeth 6a, 6b are located on the same side of the plane of the slot 10a.
  • the adjustment system comprises a housing 4, 5 including a front access opening 5d and containing:
  • a push element 2 capable to be moved in translation in a direction substantially perpendicular to the plane of the slot 10a and comprising a rear pushing portion 2b extending through the slot 10a, a front operating portion 2a located on the other side of the plane of the slot 10a, i.e. the side of the plane of the slot which has no row of teeth, and being exposed through the front access opening 5d,
  • a locking element 3 including locking means 3 a and being capable to be moved in translation in said direction, under spring tension, into a locking position in which it is locked by engagement of the locking means with the teeth 6a, 6b to prevent the enlarging or tightening of the headband and, under the pushing action of the push element 2 via its pushing portion 2b, into an unlocking position in which it is not engaged with said teeth to allow the enlarging or the tightening of the headband,
  • the push element 2 can also be named push button.
  • the housing (4, 5) contains a guiding system 2c, 5g, 5h, 32b, 33b, 4g, 4h for guiding in translation the push element 2 and the locking element 3.
  • the latter can comprise:
  • the term included into the locking element or the push element or the housing can mean preferably: integrated, attached or included integrally molded with respectively said locking element or the push element or the housing.
  • the operating portion 2a can be a single piece, or one-piece-unit.
  • the operating portion can have a disc- shaped or parallelepiped plate.
  • the operating portion 2a can have a front operating surface 20a exposed through the front access opening 5d and a rear surface 21a facing away from said front operating surface 20a and toward the locking element 3.
  • the front operating surface 20a can be designed to form a curved recessed area (figures 1, 3, 5, 6).
  • the pushing portion 2b of the push element 2 can consist of at least one pushing arm, preferably two pushing arms 20b, 21b, formed by a generally rectangular or cylindrical shaped piece which can extend substantially perpendicular the plane of the slot 10a beyond the rear surface 21a of the operating portion 2 toward the locking element 3.
  • the or each pushing arm 20b or 21b can then be provided to be engaged, preferably in abutment contact, with the latter by extending through the slot 10a (figures 3, 4, 5, 6, 7).
  • the locking element 3 can be a single piece, or one-piece-unit.
  • the locking element 3 can have a front locking surface 3b including the locking means 3a which can consist of an additional and complementary row of teeth designed to be engage, in the locking position, with the teeth 6a, 6b of the first strap portion la and a rear pressing surface 3d facing away from said front locking surface.
  • the rear pressing surface 3d can be fixed and/or in pressing contact with the spring 7 to allow the spring tension which makes it possible to move the locking element 3 into the locking position when no pushing force is exerted on the push element 2.
  • the or each pushing arm 20b, 21b can engages with the front locking surface 3b of the locking element 3.
  • the locking element 3 can comprise at least one receiving space or at least one receiving recess 30b, 31b, preferably of generally arched shape.
  • the or each receiving space or at least one receiving recess 30b, 31b can include a rear abutment surface 300b or 310b and designed to receive the or one of the pushing arm(s) 20b, 21b coming in abutment against the latter, more particularly against the rear abutment surface 300b or 310b (figure 5).
  • the rear abutment surface 300b or 310b which can extend substantially parallel to the plane of the slot 10a, then can formed the bottom of the receiving recess 30b or 31b in question.
  • the pushing element 2 can have two pushing arms 20b, 21b, preferably located in diametrically opposed position, more particulary in diametrically opposed position in relation to the operating portion 2a or the center of the latter.
  • the locking element 3 can have two guiding spaces, or two guiding recesses, 31b, 32b located adjacent to the row of teeth 30b, preferably on both sides of the ends of the latter.
  • the pushing portion 2b of the latter can comprise an elongated U-shaped member 20b, 21b, 2c having a base 2c that can be fixed to the rear surface 21a parallel to the latter and two wings 20b, 21b extending substantially perpendicular to the plane of the slot 10a toward the locking element 3.
  • each wing can form a pushing part in contact with the locking element 3. If applicable, each wing can form one of the two diametrically opposed pushing arms 20b, 21b described above.
  • the base of the elongated U- shaped member 20b, 21b, 2c can form the first guiding means 2c of the push element 2.
  • the base 2c of the U- shaped push element 2 can form or comprise a reinforcement bridge 20c.
  • the base 2c can extend longitudinally on the rear surface 21a of the operating portion 2a so as to pass, preferably, through the central axis of the operating portion 2a.
  • the push element 2 can comprise a contact rib 2d that can extend, preferably substantially perpendicular to the base 2c, on the rear surface 21a of the operating portion 2a.
  • the contact rib 2d can extend longitudinally on the rear surface 21a of the operating portion 2a so as to pass, preferably, through the central axis of the operating portion 2a.
  • the base 2c of the U-shaped push element 2 can have a core out 20d of excess material which is done to prevent Sind marks on a visible part for better aesthetics. Indeed, as the molten pastic material begins to cool after forming the part by filling the part cavity in the mold, it beings to shrink and during that process of solidification of plastic material sink marks may be formed. To reduce that possibility or to reduce the visibility of a sink mark excess material that is not detriment to the performance of the part can be removed.
  • the housing 4, 5 can have the general shape of a rectangular parallelepiped and can comprise two parts 4, 5 located on either side of the plane of the slot 10a, i.e. a rear part housing 4 which comprises a rear side 4a and contains the locking element 3 and the spring 7 and a front part housing 5 which comprises a front side 5 a including the front access opening 5d and contains the push element 2.
  • the housing 4, 5 can comprise two opposite lateral sides 5e, 5f, 4e, 4f, preferably substantially perpendicular to said front and rear sides, each lateral side comprising a passage opening 5b or 5c through thereof for enabling the passage of the first strap portion la through the housing 4, 5.
  • Each passage opening 5b or 5c can be made through the lateral sides 5e or 5f of the front part housing 5 and/or through the lateral sides 4e, 4f of the rear part housing 4, but preferably, as it can be seen in figure 1, 2, 3, 4, 5, 11, through the lateral sides 5e or 5f of the front part housing 5.
  • the housing 4, 5 can be produced or made in two parts, i.e. the rear part housing 4 and the front part housing 5 attached together, preferably releasably attached together (figures 1, 2, 3, 4, 5, 10, 11, 12).
  • the rear part housing 4 can be attached to the front part housing 5, for example, by using screws 8 and/or by cliquing or snapping means 9 (figures 2, 3, 4, 9, 11).
  • third guiding means 5g, 5h can be fixed to, or integrated into, the inner surface of the front side 5a and/or to the inner surface of at least one of the lateral sides 5e, 5f of the front part housing 5 and that said fourth guiding means 4g, 4h, 4i, 4j, 4k, 41 can be fixed to, or integrated into, adjacent to the spring 7, to the inner surface of the rear side 4a and/or to the inner surface of at least one of the lateral sides 4e, 4f of the rear part housing 4, 5.
  • third guiding means 5g, 5h can consist of at least one slide or one slider and fourth guiding means 4g, 4h, 4i, 4j, 4k, 41 extending adjacent to, or around, the spring 7, can consist of at least one slide or one slider.
  • first guiding means 2c can consist of at least one slider or at least one slide engaging with third guiding means 5g, 5h so as to form at least a first front slide link 5g, 5h, 2c between the push element 2 and the front part housing 4.
  • second guiding means 32b, 33b can consist of at least one slider or at least one slide engaging with the fourth guiding means 4g, 4h, 4i, 4j, 4k, 41 so as to form at least a second slide link 4g, 4h, 4i, 4j, 4k, 41, 32b, 33b between the locking element 3 and the rear part housing 5.
  • third guiding means 5g, 5h can consist of two slide recesses located on the inner surface of the front part housing 5 a, preferably in diametrically opposed position in relation to the front opening access 5d.
  • the two slide recesses 5g, 5h can be capable of receiving the base 2c of the elongated U-shaped member 20b, 21b, 22b, in a position substantially parallel to the opening access 5d.
  • each slide recess 5g or 5h can be opened toward the other slide recess 5g or 5h and toward the locking element 3 to enable the passage of the base 2c into the slide recesses 5g, 5h.
  • the locking element 3 can comprise a main body having a generally rectangular parallelepiped shape extending between two terminal guiding ends 32b, 33b each forming a slider 3b.
  • the main body can have two opposite front and rear sides, namely a front side including the front locking surface 3a and a rear side including the rear pressing surface 3d.
  • the row of teeth which forms the locking means 3 a can extend longitudinally by being set back from each terminal guiding end.
  • fourth guiding means 4g, 4h, 4i, 4j, 4k, 41 can consist of a slide formed by a plurality of lateral guides, preferably six lateral guides, surrounding a space for receiving and sliding the locking element 3, each lateral guides being located on the inner surface of the rear part housing 4, either on the inner surface of the lateral sides 4e, 4f or on the inner surface of the rear side 4a.
  • each terminal guiding ends 32b, 33b of the looking element 3 then can be in guiding contact with a plurality of lateral guides, for example three lateral guides.
  • the or each receiving space or receiving recess 30b Preferably, the or each receiving space or receiving recess 30b,
  • 31b of the front locking surface 3b of the locking element 3 can be made in the front surface of one of the terminal guiding ends 32b or 33b (figures 3, 4, 8).
  • the or each receiving space or receiving recess 30b, 31b can be surrounding by a plurality of walls each being in contact by its outer surface with a lateral guide 4g or 4h or 4i or 4j or 4k or 41.
  • the spring 7 can be a compression spring or a coil spring.
  • the spring 7 can have a first end 7a and a second end 7b.
  • the first end 7a can be fixed to and/or in pressing contact with, the inner surface of the rear side 5c of the housing 4, 5 and the second end 7b can be fixed to and/or in pressing contact with the rear pressing surface 3d of the locking element 3 (figures 3, 9, 12).
  • the second end 7b can be fixed to and/or in pressing contact in a receipt cavity 3e, preferably a circular receipt cavity, made in the rear pressing surface 3d of the locking element 3, preferably substantially at the center of said rear pressing surface.
  • the front acces opening 5b can have an inner edge 5i which can extend into the housing 4, 5, more particularly into the front part housing 5, and that the inner edge can comprise a pressure contact rib which can be interrupted at the slide recesses 4g, 4h to enable reception of both terminal guiding ends 32b.
  • the inner edge can project inward toward the locking element 3 preferably using a globally cylindrical projection 5j.
  • the pressure contact rib 11 can have an annular shape and can comprise two globally semicircular or semi annular contact ribs 11a, l ib each extending from one slide recess to the other.
  • Such a pressure contact rib 11 prevents a slippage of the headband 1, i.e the first strap portion of the latter, due to flexibility of the material with which the terminal is made.
  • the contact pressure rib can sandwiche the headband 1, preferably made using a non rigid material, between itself and the locking element 3.
  • This invention has also as its object a safety helmet more particularly for use in construction, manufacturing or industrial applications, comprising a protective hard shell capable of extending upon a surface region of the head of a person wearing the safety helmet, wherein it further comprises a headband and adjustment device according to this invention as described above.
  • such a headband and adjustment device can include one terminal-pull tightening adjustment and one push element or push button, which is auto release due to spring, which making a fast adjustment system specifically for security helmet.

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  • Helmets And Other Head Coverings (AREA)

Abstract

This invention has as its object a headband and adjustment device for safety helmet, said headband and adjustment device comprising an adjustable headband (1) having a first strap portion (la) and a second strap portion (lb) and an adjustment system for enlarging or tightening of the headband (1), said first strap portion (1a) being provided with an elongated slot (10a) delimited longitudinally by two longitudinal sides and which includes at least a row of teeth (6a). The adjustment system comprises a housing (4, 5) containing a push element (2), a locking element movable in translation, under spring tension using a spring, into a locking position in which it is locked by engagement of the locking means with the teeth and, under the pushing action of the push element, into an unlocking position, and a guiding system. It also has as its object a safety helmet provided with such a device.

Description

HEADBAND AND ADJUSTMENT DEVICE AND A SAFETY HELMET
WITH SUCH A DEVICE
The invention relates to the field of safety helmets and more particularly to safety helmets for use in construction, manufacturing or industrial applications, and in particular to the parts, details or accessories of helmets and it has as its object a headband and adjustment device for safety helmet and a safety helmet provided of such a device.
Safety helmets are already known, such as safety helmet for construction, manufacturing or industrial workers, that each typically includes a hard shell portion, i.e. a head casing for taking impact, a lining portion such as headband or harness holding the helmet on the user's head and coupled to an adjustment mechanism for size fitment and retention. The adjustment mechanism consists generally of a ratchet system such as a slip- ratchet or rotary ratchet.
Most existing adjustment mechanisms include a lower rear shell portion having a clutching mechanism that allows the user to manually adjust the size of headband to fit its head size and be retained firmly. Together the adjustment system includes a strap that engages the adjustment mechanism and a flexible, durable and tough material that conforms to a wearer's head. The main purpose of the adjustment mechanism is to have the helmet couple snugly around the user's head and be firmly retained during use.
However, if there are several known adjustment mechanisms and headband, further enhancements based on user needs make room for uniqueness, differentiation and ease of operation. More particularly, the process of adjustment with current adjustment mechanisms is cumbersome and time consuming as the user cannot see it while wearing the helmet and operates by hand only by feeling it. The activation of the these known adjustment mechanisms then require generally several operations, a lot of effort and time for sizing the headband to user's size, whether to adjust the safety helmet on the head or to release it. In addition, common adjustment systems require usually to slide and tie straps, slip ratchets or more expensive ratchets or clutching systems that operate knobs or lever.
This invention has as its object to remedy to at least one of these drawbacks by proposing a headband and adjustment device for safety helmet such as for construction, manufacturing or industrial workers, that make extremely fast adjustment possible in a single operation of hands, this with a manufacturing cost lower than the current systems and with least effort and time to adjust and retain the safety helmet on the head or release it than with said current systems.
For this purpose, the present invention, has as its object a headband and adjustment device for safety helmet, said headband and adjustment device comprising an adjustable headband having a first strap portion and a second strap portion and an adjustment system for enlarging or tightening of the headband, said first strap portion being provided with an elongated slot delimited longitudinally by two longitudinal sides and at least a row of teeth extending along one of the latter and on one side of the plane of the slot, wherein the adjustment system comprises a housing including a front access opening and containing :
- a push element capable to be moved in translation in a direction substantially perpendicular to the plane of the slot and comprising a rear pushing portion extending through the slot, a front operating portion located on the other side of the plane of the slot and being exposed through the front access opening,
- a locking element including locking means and being capable to be moved in translation in said direction, under spring tension, into a locking position in which it is locked by engagement of the locking means with the teeth to prevent the enlarging or tightening of the headband and, under the pushing action of the push element via its pushing portion, into an unlocking position in which it is not engaged with said teeth to allow the enlarging or the tightening of the headband,
- a spring for applying a return force able to press and maintain under the spring tension the locking element in the locking position,
- a passage through the housing for the passage of the first strap portion between the operating portion and the movable locking element,
- a guiding system for guiding in translation the push element and the locking element.
The present invention, also has as its object a safety helmet more particularly for use in construction, manufacturing or industrial applications, comprising a protective hard shell capable of extending upon a surface region of the head of a person wearing the safety helmet, wherein it further comprises a headband and adjustment device according to this invention as described above. The invention will be better understood using the description below, which relates to at least one preferred embodiment, given by way of non-limiting example and explained with reference to the accompanying diagrammatic drawings, in which
- figure 1 shows a perspective view of a headband and adjustment device for safety helmet according to the invention, in a view showing the front part of said device,
- figure 2 shows a perspective view of the headband and adjustment device represented in figure 1, in a view showing the rear part of said device,
- figure 3 shows a partial perspective view of the headband and adjustment device in front view such as represented in figure 1, when dismantled,
- figure 4 shows a partial perspective view of the headband and adjustment device in a rear view such as represented in figure 2, when dismantled,
- figure 5 shows a partial perspective view of the headband and adjustment device in a front view such as represented in figure 1, when dismantled, showing the inside of the housing,
- figure 6 shows a perspective view of the push element represented in figure 1, in a front view,
- figure 7 shows a perspective view of the push element represented in figure 6, in a rear view,
- figure 8 shows a perspective view of the locking element represented in figure 1, in a front view,
- figure 9 shows a perspective view of the locking element represented in figure 6, in a rear view,
- figure 10 shows a perspective view of the front side housing of the housing represented in figure 1, in a front view,
- figure 11 shows a perspective view of the front part housing of the housing represented in figure 10, in a rear view showing its inner surface,
- figure 12 shows a perspective view of the rear part housing of the housing represented in figure 1, in a front view showing its inner surface,
- figure 13 shows a perspective view of the first strap portion of the headband and adjustment device represented in figure 1, on the side of the slot comprising two rows of teeth 6a, 6b extending each alongside one of the sides delimiting said slot.
The figures show a headband and adjustment device, according to this invention, for safety helmet, said headband and adjustment device comprising an adjustable headband 1 having a first strap portion la and a second strap portion lb and an adjustment system 2, 3, 4, 5 for enlarging or tightening of the headband 1, said first strap portion la being provided with an elongated slot 10a delimited longitudinally by two longitudinal sides and at least a row of teeth 6a, 6b extending along one of the latter and on one side of the plane of the slot 10a.
Preferably, the first strap portion la can comprise two rows of teeth 6a, 6b, one row of teeth 6a extending along one of the longitudinal sides and the other row of teeth 6b extending along the other longitudinal sides. Both rows of teeth 6a, 6b are located on the same side of the plane of the slot 10a.
According to this invention, the adjustment system comprises a housing 4, 5 including a front access opening 5d and containing:
- a push element 2 capable to be moved in translation in a direction substantially perpendicular to the plane of the slot 10a and comprising a rear pushing portion 2b extending through the slot 10a, a front operating portion 2a located on the other side of the plane of the slot 10a, i.e. the side of the plane of the slot which has no row of teeth, and being exposed through the front access opening 5d,
- a locking element 3 including locking means 3 a and being capable to be moved in translation in said direction, under spring tension, into a locking position in which it is locked by engagement of the locking means with the teeth 6a, 6b to prevent the enlarging or tightening of the headband and, under the pushing action of the push element 2 via its pushing portion 2b, into an unlocking position in which it is not engaged with said teeth to allow the enlarging or the tightening of the headband,
- a spring 7 for applying a return force able to press and maintain under the spring tension the locking element 3 in the locking position,
- a passage 5b, 5c through the housing 4, 5 for the passage of the first strap portion la between the operating portion 2a and the movable locking element 3. It will be understood by the above sentence "exposed through the front access opening 5d" the fact that the front access opening 5b exposed the operating portion through the housing 4, 5 for enabling the activation of the push element 2 by a user which can then reach the push element 2 with his hand and push it. The push element 2 can also be named push button.
Still according to this invention, the housing (4, 5) contains a guiding system 2c, 5g, 5h, 32b, 33b, 4g, 4h for guiding in translation the push element 2 and the locking element 3.
It will understand that the locking element 3 is movable against the return force of the spring 7.
In a preferred embodiment of the guiding system, the latter can comprise:
- first guiding means 2c included into the push element 2, - second guiding means 32b, 33b included into the locking element 3,
- third guiding means 5g, 5h included into the housing 4, 5 and engages with said first guiding means so as to enable the movement in translation of the push element 2,
- fourth guiding means 4g, 4h, 4i, 4j included into the housing
4, 5 and engages with said second guiding means so as to enable the movement in translation of the locking element 3. According to this invention, the term included into the locking element or the push element or the housing can mean preferably: integrated, attached or included integrally molded with respectively said locking element or the push element or the housing.
In a preferred embodiment of this invention, as it can be seen in figures 1, 2, 3, 4, 5, 6, 7, the operating portion 2a can be a single piece, or one-piece-unit. In addition, the operating portion can have a disc- shaped or parallelepiped plate. The operating portion 2a can have a front operating surface 20a exposed through the front access opening 5d and a rear surface 21a facing away from said front operating surface 20a and toward the locking element 3.
Preferably, the front operating surface 20a can be designed to form a curved recessed area (figures 1, 3, 5, 6).
Preferably, the pushing portion 2b of the push element 2 can consist of at least one pushing arm, preferably two pushing arms 20b, 21b, formed by a generally rectangular or cylindrical shaped piece which can extend substantially perpendicular the plane of the slot 10a beyond the rear surface 21a of the operating portion 2 toward the locking element 3. The or each pushing arm 20b or 21b can then be provided to be engaged, preferably in abutment contact, with the latter by extending through the slot 10a (figures 3, 4, 5, 6, 7).
If we refer specifically to figures 3, 4, 8, 9, it can be seen that the locking element 3 can be a single piece, or one-piece-unit. In addition, the locking element 3 can have a front locking surface 3b including the locking means 3a which can consist of an additional and complementary row of teeth designed to be engage, in the locking position, with the teeth 6a, 6b of the first strap portion la and a rear pressing surface 3d facing away from said front locking surface. The rear pressing surface 3d can be fixed and/or in pressing contact with the spring 7 to allow the spring tension which makes it possible to move the locking element 3 into the locking position when no pushing force is exerted on the push element 2. In the embodiment where the pushing portion 2b of the push element 2 consist of at least one pushing arm, the or each pushing arm 20b, 21b can engages with the front locking surface 3b of the locking element 3. In addition, the locking element 3 can comprise at least one receiving space or at least one receiving recess 30b, 31b, preferably of generally arched shape. The or each receiving space or at least one receiving recess 30b, 31b can include a rear abutment surface 300b or 310b and designed to receive the or one of the pushing arm(s) 20b, 21b coming in abutment against the latter, more particularly against the rear abutment surface 300b or 310b (figure 5). The rear abutment surface 300b or 310b, which can extend substantially parallel to the plane of the slot 10a, then can formed the bottom of the receiving recess 30b or 31b in question.
Preferably, as it can be seen in figures 3, 4, 5, 6, 7, the pushing element 2 can have two pushing arms 20b, 21b, preferably located in diametrically opposed position, more particulary in diametrically opposed position in relation to the operating portion 2a or the center of the latter. On the other hand, the locking element 3 can have two guiding spaces, or two guiding recesses, 31b, 32b located adjacent to the row of teeth 30b, preferably on both sides of the ends of the latter.
In a preferred embodiment of the push element 2, as it can be seen specifically in figures 3, 4, 5, 6, 7, that the pushing portion 2b of the latter can comprise an elongated U-shaped member 20b, 21b, 2c having a base 2c that can be fixed to the rear surface 21a parallel to the latter and two wings 20b, 21b extending substantially perpendicular to the plane of the slot 10a toward the locking element 3. In addition, each wing can form a pushing part in contact with the locking element 3. If applicable, each wing can form one of the two diametrically opposed pushing arms 20b, 21b described above.
On the other hand, preferably, the base of the elongated U- shaped member 20b, 21b, 2c can form the first guiding means 2c of the push element 2. As it can also be seen in figure 7, the base 2c of the U- shaped push element 2 can form or comprise a reinforcement bridge 20c. Preferably the base 2c can extend longitudinally on the rear surface 21a of the operating portion 2a so as to pass, preferably, through the central axis of the operating portion 2a.
In figure 7, it can still be seen that the push element 2 can comprise a contact rib 2d that can extend, preferably substantially perpendicular to the base 2c, on the rear surface 21a of the operating portion 2a. Preferably the contact rib 2d can extend longitudinally on the rear surface 21a of the operating portion 2a so as to pass, preferably, through the central axis of the operating portion 2a.
Still in figure 7, it can be seen that the base 2c of the U-shaped push element 2 can have a core out 20d of excess material which is done to prevent sind marks on a visible part for better aesthetics. Indeed, as the molten pastic material begins to cool after forming the part by filling the part cavity in the mold, it beings to shrink and during that process of solidification of plastic material sink marks may be formed. To reduce that possibility or to reduce the visibility of a sink mark excess material that is not detriment to the performance of the part can be removed.
As it can be seen in figures 1, 2, 3, 4, 5, 10, 11, 12, in a preferred embodiment of the housing 4, 5, the latter can have the general shape of a rectangular parallelepiped and can comprise two parts 4, 5 located on either side of the plane of the slot 10a, i.e. a rear part housing 4 which comprises a rear side 4a and contains the locking element 3 and the spring 7 and a front part housing 5 which comprises a front side 5 a including the front access opening 5d and contains the push element 2. In addition, the housing 4, 5 can comprise two opposite lateral sides 5e, 5f, 4e, 4f, preferably substantially perpendicular to said front and rear sides, each lateral side comprising a passage opening 5b or 5c through thereof for enabling the passage of the first strap portion la through the housing 4, 5. Each passage opening 5b or 5c can be made through the lateral sides 5e or 5f of the front part housing 5 and/or through the lateral sides 4e, 4f of the rear part housing 4, but preferably, as it can be seen in figure 1, 2, 3, 4, 5, 11, through the lateral sides 5e or 5f of the front part housing 5.
Preferably, the housing 4, 5 can be produced or made in two parts, i.e. the rear part housing 4 and the front part housing 5 attached together, preferably releasably attached together (figures 1, 2, 3, 4, 5, 10, 11, 12). The rear part housing 4 can be attached to the front part housing 5, for example, by using screws 8 and/or by cliquing or snapping means 9 (figures 2, 3, 4, 9, 11).
If we refer specifically to figures 3, 4, 5, 10, 11, 12, it can be seen that third guiding means 5g, 5h can be fixed to, or integrated into, the inner surface of the front side 5a and/or to the inner surface of at least one of the lateral sides 5e, 5f of the front part housing 5 and that said fourth guiding means 4g, 4h, 4i, 4j, 4k, 41 can be fixed to, or integrated into, adjacent to the spring 7, to the inner surface of the rear side 4a and/or to the inner surface of at least one of the lateral sides 4e, 4f of the rear part housing 4, 5. In addition, third guiding means 5g, 5h can consist of at least one slide or one slider and fourth guiding means 4g, 4h, 4i, 4j, 4k, 41 extending adjacent to, or around, the spring 7, can consist of at least one slide or one slider. Furthermore, first guiding means 2c can consist of at least one slider or at least one slide engaging with third guiding means 5g, 5h so as to form at least a first front slide link 5g, 5h, 2c between the push element 2 and the front part housing 4. In the other hand, second guiding means 32b, 33b can consist of at least one slider or at least one slide engaging with the fourth guiding means 4g, 4h, 4i, 4j, 4k, 41 so as to form at least a second slide link 4g, 4h, 4i, 4j, 4k, 41, 32b, 33b between the locking element 3 and the rear part housing 5.
Furthermore, as it can be seen in figure 4, 5, 11, preferably, third guiding means 5g, 5h can consist of two slide recesses located on the inner surface of the front part housing 5 a, preferably in diametrically opposed position in relation to the front opening access 5d. In addition, the two slide recesses 5g, 5h can be capable of receiving the base 2c of the elongated U-shaped member 20b, 21b, 22b, in a position substantially parallel to the opening access 5d. To this effect, as it can be seen in figure 4, 10, 11, each slide recess 5g or 5h can be opened toward the other slide recess 5g or 5h and toward the locking element 3 to enable the passage of the base 2c into the slide recesses 5g, 5h.
In a preferred form of the locking element 3, as it can be seen in figure 3, 4, 5, 8, 9 the latter can comprise a main body having a generally rectangular parallelepiped shape extending between two terminal guiding ends 32b, 33b each forming a slider 3b. In addition the main body can have two opposite front and rear sides, namely a front side including the front locking surface 3a and a rear side including the rear pressing surface 3d. Furthermore, the row of teeth which forms the locking means 3 a can extend longitudinally by being set back from each terminal guiding end. On the other hand, fourth guiding means 4g, 4h, 4i, 4j, 4k, 41 can consist of a slide formed by a plurality of lateral guides, preferably six lateral guides, surrounding a space for receiving and sliding the locking element 3, each lateral guides being located on the inner surface of the rear part housing 4, either on the inner surface of the lateral sides 4e, 4f or on the inner surface of the rear side 4a. In addition each terminal guiding ends 32b, 33b of the looking element 3 then can be in guiding contact with a plurality of lateral guides, for example three lateral guides.
Preferably, the or each receiving space or receiving recess 30b,
31b of the front locking surface 3b of the locking element 3 can be made in the front surface of one of the terminal guiding ends 32b or 33b (figures 3, 4, 8). In this case, the or each receiving space or receiving recess 30b, 31b can be surrounding by a plurality of walls each being in contact by its outer surface with a lateral guide 4g or 4h or 4i or 4j or 4k or 41.
Preferably, the spring 7 can be a compression spring or a coil spring. In addition the spring 7 can have a first end 7a and a second end 7b. The first end 7a can be fixed to and/or in pressing contact with, the inner surface of the rear side 5c of the housing 4, 5 and the second end 7b can be fixed to and/or in pressing contact with the rear pressing surface 3d of the locking element 3 (figures 3, 9, 12). Preferably the second end 7b can be fixed to and/or in pressing contact in a receipt cavity 3e, preferably a circular receipt cavity, made in the rear pressing surface 3d of the locking element 3, preferably substantially at the center of said rear pressing surface.
Referring once again specifically to figures 4 and 11, it can be seen specifically that the front acces opening 5b can have an inner edge 5i which can extend into the housing 4, 5, more particularly into the front part housing 5, and that the inner edge can comprise a pressure contact rib which can be interrupted at the slide recesses 4g, 4h to enable reception of both terminal guiding ends 32b. The inner edge can project inward toward the locking element 3 preferably using a globally cylindrical projection 5j. Preferably, the pressure contact rib 11 can have an annular shape and can comprise two globally semicircular or semi annular contact ribs 11a, l ib each extending from one slide recess to the other. Such a pressure contact rib 11 prevents a slippage of the headband 1, i.e the first strap portion of the latter, due to flexibility of the material with which the terminal is made. In order to avoid less net effective release force than required for predetermined release and to ensure sufficient or adequate holding on the headband 1 while in locked position, the contact pressure rib can sandwiche the headband 1, preferably made using a non rigid material, between itself and the locking element 3.
This invention has also as its object a safety helmet more particularly for use in construction, manufacturing or industrial applications, comprising a protective hard shell capable of extending upon a surface region of the head of a person wearing the safety helmet, wherein it further comprises a headband and adjustment device according to this invention as described above.
Therefore, in this invention, such a headband and adjustment device can include one terminal-pull tightening adjustment and one push element or push button, which is auto release due to spring, which making a fast adjustment system specifically for security helmet.
Of course, the invention is not limited to the at least one embodiment described and represented in the accompanying drawings. Modifications remain possible, particularly from the viewpoint of the composition of the various elements or by substitution of technical equivalents without thereby exceeding the field of protection of the invention.

Claims

1. Headband and adjustment device for safety helmet, said headband and adjustment device comprising an adjustable headband (1) having a first strap portion (la) and a second strap portion (lb) and an adjustment system for enlarging or tightening of the headband (1), said first strap portion (la) being provided with an elongated slot (10a) delimited longitudinally by two longitudinal sides and at least a row of teeth (6a, 6b) extending along one of the latter and on one side of the plane of the slot (10a),
wherein the adjustment system comprises a housing (4, 5) including a front access opening (5d) and containing:
- a push element (2) capable to be moved in translation in a direction substantially perpendicular to the plane of tbe slot (10a) and comprising a rear pushing portion (2b) extending through the slot (10a), a front operating portion (2a) located on the other side of the plane of the slot (10a) and being exposed through the front access opening (5d),
- a locking element (3) including locking means (3 a) and being capable to be moved in translation in said direction, under spring tension, into a locking position in which it is locked by engagement of the locking means with the teeth (6a, 6b) to prevent the enlarging or tightening of the headband and, under the pushing action of the push element (2) via its pushing portion (2b), into an unlocking position in which it is not engaged with said teeth to allow the enlarging or the tightening of the headband,
- a spring (7) for applying a return force able to press and maintain under the spring tension the locking element (3) in the locking position,
- a passage (5b, 5c) through the housing (4, 5) for the passage of the first strap portion (la) between the operating portion (2a) and the movable locking element (3),
- a guiding system (2c, 5g, 5h, 32b, 33b, 4g, 4h) for guiding in translation the push element (2) and the locking element (3).
2. Headband and adjustment device, according to claim 1, wherein the guiding system comprises:
- first guiding means (2c) included into the push element (2), - second guiding means (32b, 33b) included into the locking element (3),
- third guiding means (5g, 5h) included into the housing (4, 5) and engages with said first guiding means (2c) so as to enable the movement in translation of the push element (2),
- fourth guiding means (4g, 4h, 4i, 4j, 4k, 41) included into the housing (4, 5) and engages with said second guiding means so as to enable the movement in translation of the locking element (3).
3. Headband and adjustment device, according to claim 2, wherein the operating portion (2a) is a single piece having a disc-shaped or parallelepiped plate, said operating portion having a front operating surface (20a) exposed through the front access opening (5d) and a rear surface (21a) facing away from said front operating surface and toward the locking element (3).
4. Headband and adjustment device, according to claim 3, wherein the front operating surface (20a) is designed to form a curved recessed area.
5. Headband and adjustment device, according to claim 3 or claim 4, wherein the pushing portion (2b) of the push element (2) consist of at least one pushing arm, preferably two pushing arms (20b, 21b), formed by a generally rectangular or cylindrical shaped piece which extend substantially perpendicular the plane of the slot (10a) beyond the rear surface (21a) of the operating portion (2) toward the locking element (3) and engages with the latter by extending through the slot (10a).
6. Headband and adjustment device, according to anyone of claims 2 to 5, wherein the locking element (3) is a single piece having a front locking surface (3b) including the locking means (3 a) which consist of an additional and complementary row of teeth designed to be engage, in the locking position, with the teeth (6a, 6b) of the first strap portion (la) and a rear pressing surface (3d) facing away from said front locking surface and being fixed and/or in pressing contact with the spring (7).
7. Headband and adjustment device, according to claim 5 and 6, wherein the or each pushing arm (20b, 21b) engages with the front locking surface (3b) of the locking element (3) and wherein the locking element (3) comprises at least one receinving space or at least one receiving recess (30b, 31b) including a rear abutment surface and designed to receive the or one of the pushing arm(s) (20b, 21b) coming in abutment against the latter.
8. Headband and adjustment device, according to claim 7, wherein the pushing element (2) has two pushing arms (20b, 21b) located in diametrically opposed position, more particularly in diametrically opposed position relation to the operating portion (2a) or the center of the latter, and the locking element (3) has two guiding spaces or two guiding recesses (31b, 32b) located adjacent to the row of teeth (30b), preferably on both sides of the ends of the latter.
9. Headband and adjustment device, according to anyone of claims 2 to 8, wherein the pushing portion (2b) of the push element (2) comprises an elongated U-shaped member (20b, 21b, 2c) having a base (2c) fixed to the rear surface (21a) parallel to the latter and two wings (20b, 21b) extending substantially perpendicular to the plane of the slot (10a) toward the locking element (3), each wing forming a pushing part in contact with the locking element (3), if applicable each wing forming one of the two diametrically opposed pushing arms (20b, 21b).
10. Headband and adjustment device, according to claim 9, wherein the base of the elongated U-shaped member (20b, 21b, 2c) forms the first guiding means (2c).
11. Headband and adjustment device, according to anyone of claims 1 to 10, wherein the housing (4, 5) has the general shape of a rectangular parallelepiped and comprises two parts (4, 5) located on either side of the plane of the slot (10a), i.e. a rear part housing (4) which comprises a rear side (4a) and contains the locking element (3) and the spring (7) and a front part housing (5) which comprises a front side (5a) including the front access opening (5d) and contains the push element (2) and wherein said housing comprising two opposite lateral sides (5e, 5f, 4e, 4f), substantially perpendicular to said front and rear sides, each lateral side comprising a passage opening (5b, 5c) through thereof for enabling the passage of the first strap portion (la) through the housing (4, 5).
12. Headband and adjustment device, according to claim 11, wherein the housing (4, 5) is produced in two parts, i.e. the rear part housing (4) and the front part housing (5) attached together, preferably releasably attached together.
13. Headband and adjustment device, according to claim 11 or claim 12, wherein third guiding means (5g, 5h) being fixed to or integrated into the inner surface of the front side (5a) and/or to the inner surface of at least one of the lateral sides (5e, 5f) of the housing (4, 5) and said fourth guiding means (4g, 4h, 4i, 4j) being fixed to or integrated into the inner surface of the rear side (4a) and/or to the inner surface of at least one of the lateral sides (4e, 4f) of the housing (4, 5) and wherein third guiding means consist of at least one slide (5g, 5h) or one slider and fourth guiding means (4g, 4h, 4i, 4j, 4k, 41), extending adjacent the spring (7), consist of at least one slide or one slider, wherein first guiding means (2c) consist of at least one slider or at least one slide engaging with third guiding means (5g, 5h) so as to form at least a first front slide link (5g, 5h, 2c) between the push element and the front part housing (4), and wherein second guiding means consist of at least one slider (32b, 33b) or at least one slide engaging with the fourth guiding means (4g, 4h, 4i, 4j, 4k, 41) so as to form at least a second slide link (4g, 4h, 4i, 4j, 4k, 41 32b, 33b) between the locking element (3) and the rear part housing (5).
14. Headband and adjustment device, according to claim 13 and claim 10, wherein third guiding means consist of two slide recesses (5g, 5h) located in the inner surface of the front side (5 a) of the housing (5) in diametrically opposed position in relation to the front opening access (5d), said two slide recesses (4a, 4b) being capable of receiving the base (2c) of the elongated U-shaped member (20b, 21b, 22b), in a position substantially parallel to the opening access (5d).
15. Headband and adjustment device, according to claim 13 or claim 14 each combined with claim 6, wherein the locking element (3) comprises a main body which has a generally rectangular parallelepiped shape extending between two terminal guiding ends (32b, 33b) each forming a slider and wherein said main body has two opposite front and rear sides, namely a front side including the front locking surface (3a) and rear side including the rear pressing surface (3d) and wherein fourth guiding means (4g, 4h, 4i, 4j, 4k, 41) consist of a slide formed by a plurality of lateral guides surrounding a space for receiving and sliding the locking element (3), each lateral guides being located on the inner surface of the rear part housing (4), either on the inner surface of the lateral sides (4e, 4f) or on the inner surface of the rear side (4a) and wherein each terminal guiding ends (32b, 33b) of the looking element (3) is in guiding contact with a plurality of lateral guides.
16. Headband and adjustment device, according to anyone of claims 11 to claim 15 each combined with claim 6, wherein the spring (7), such as a compression spring or a coil spring, has a first end (7a) and a second end (7b) and wherein the first end (7a) of the spring (7) is fixed to, and/or in pressing contact with, the inner surface of the rear side (5c) of the housing (4, 5) and the second end (7b) is fixed to and/or in pressing contact with the rear pressing surface (3d) of the locking element (3).
17. Headband and adjustment device, according to anyone of claims 1 to 16, wherein the front acces opening (5b) has an inner edge (5i) extending into the housing (4, 5), said inner edge comprising a pressure contact rib (11).
18. Safety helmet more particularly for use in construction, manufacturing or industrial applications, comprising a protective hard shell capable of extending upon a surface region of a head of a person wearing the safety helmet, wherein it further comprises a headband and adjustment device according to anyone of claims 1 to 17.
PCT/EP2015/079662 2015-12-14 2015-12-14 Headband and adjustment device and a safety helmet with such a device WO2017101975A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/079662 WO2017101975A1 (en) 2015-12-14 2015-12-14 Headband and adjustment device and a safety helmet with such a device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/079662 WO2017101975A1 (en) 2015-12-14 2015-12-14 Headband and adjustment device and a safety helmet with such a device

Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112515843A (en) * 2020-11-30 2021-03-19 居天联影科技(深圳)有限公司 Pet vision aid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2354928A (en) * 1999-10-07 2001-04-11 Raleigh Industries Ltd An adjuster for a helmet
US20060053532A1 (en) * 2004-09-15 2006-03-16 Ketterer Kevin R Adjustable headband
US20090320186A1 (en) * 2008-06-26 2009-12-31 Zedel Protection helmet with improved adjustable neckband

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2354928A (en) * 1999-10-07 2001-04-11 Raleigh Industries Ltd An adjuster for a helmet
US20060053532A1 (en) * 2004-09-15 2006-03-16 Ketterer Kevin R Adjustable headband
US20090320186A1 (en) * 2008-06-26 2009-12-31 Zedel Protection helmet with improved adjustable neckband

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112515843A (en) * 2020-11-30 2021-03-19 居天联影科技(深圳)有限公司 Pet vision aid

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