US20130219598A1 - Ear defenders for fastening to a protective helmet, in particular for forestry workers - Google Patents
Ear defenders for fastening to a protective helmet, in particular for forestry workers Download PDFInfo
- Publication number
- US20130219598A1 US20130219598A1 US13/808,803 US201113808803A US2013219598A1 US 20130219598 A1 US20130219598 A1 US 20130219598A1 US 201113808803 A US201113808803 A US 201113808803A US 2013219598 A1 US2013219598 A1 US 2013219598A1
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- United States
- Prior art keywords
- supporting bracket
- rotary plate
- ear
- helmet
- ear protection
- 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.)
- Abandoned
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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
- A42B3/16—Ear protection devices
-
- 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
-
- 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
- A42B3/142—Suspension devices with restraining or stabilizing means, e.g. nape straps
-
- 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
-
- 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
- A42B3/147—Anchoring means
-
- 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
- A42B3/16—Ear protection devices
- A42B3/163—Wind or noise deflectors
-
- 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
- A42B3/16—Ear protection devices
- A42B3/166—Integral hearing protection
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Helmets And Other Head Coverings (AREA)
Abstract
An ear protection to be fastened to a protective helmet, particularly for forestry workers, is described. The ear protection comprises two ear protectors each of which comprises a fork-like supporting bracket comprising ear protection capsule pivotably supported thereon and a rotary plate connected to the supporting bracket by a tilting joint in relation to which the supporting bracket can be bistably tilted into an extended and into a retracted position. The rotary plate is rotatably supported in a receiving part attached to the helmet. A yoke spring disposed between the rotary plate and the supporting bracket pre-stresses the supporting bracket to abut on stoppers defining the extended and the retracted position of the supporting bracket. The receiving part is attached to the inside of the helmet. The ear protectors are therefore rotatable into a parking position within the helmet.
Description
- The invention relates to an ear protection to be fastened to a protective helmet, particularly for forestry workers, comprising two ear protectors each of which comprises: a fork-like supporting bracket on which an ear protection capsule is pivotably supported, a rotary plate jointedly connected to the supporting bracket in relation to which the supporting bracket is bistably tiltable into an extended and into a retracted position, and a receiving part attachable or attached to a helmet in which the rotary plate is rotatably supported and which is pivotable between an operating position and a parking position defined by stoppers.
- Such an ear protection is known from the DE 10 2007 011 110 A1 which will be referred to in more detail further below.
- A protective helmet comprising such an ear protection is known from the document DE 8714490 U1. The protective helmet is comprised of a helmet shell and interior fittings. The interior fittings are comprised of a crossed strap by means of which the helmet is worn on the head and which ensures a shock absorbing distance between the head and the helmet shell. The helmet has, at its outer circumference, a protrusion encompassing the lateral and the rear part of the helmet which is provided with four recesses for fastening the crossed strap and other recesses for fastening additional attachment elements at the lower edge. The additional attachment elements may be added or removed as required. At the broadest positions of the helmet a recess is provided on the outside of the protrusion encompassing the largest part of the helmet. This is the attachment position of, among other items, the ear protection. The ear protection is comprised of two ear protectors respectively comprising a wire bracket and an ear protection capsule. The ear protection is, together with a face protection, fixed to the outside of the helmet by means of a common connecting piece which is inserted into the protrusion. Disadvantageous in a helmet equipped like such is that, in use, obstacles the helmet passes engage behind the brackets of the ear protection capsules and, in this way, impair the wearer of the helmet on duty or may tear the helmet from his or her head and thereby endanger the wearer.
- An ear protection known from the DE 10 2007 011 110 A1 already mentioned in the beginning comprises a device for attaching an ear protection capsule to the outside of a protective helmet. Here, a protective helmet is referred to in which the helmet design is, by default, customized so that two ear protectors can be releasably attached to the outside of the helmet at its edge on each side of the helmet above the position of the ear in a slot or the like provided in the helmet there. For this purpose, a receiving part or each ear protector is formed so that it can be fixed in the slot by means of a snap-on fastening. The ear protectors are worn in an operating position during work in which the ear protection capsules are in a retracted position in which they tightly abut the ears. The ear protectors can be moved into a standby position from the operating position if the ear protection is temporarily unnecessary. In this position, the ear protection capsules are located in an extended position in which they are still positioned above the ears, however, pivoted away from the ears to the outside. The ear protection capsules may also be retained in this position, for example, to enable a conversation during work. Finally, a break or parking position exists for the ear protectors. In the parking position, the ear protection capsules are pivoted upwards from the operating position towards the rear side and on the outside of the helmet. For the ear protection capsules to be movable past the edge of the helmet into the parking position, it is required to first bring the ear protectors into the standby position. Retaining each ear protection capsule in the extended or retracted position is rendered possible by a double-tongued leaf spring jointedly connecting the supporting bracket of the ear protection capsule to a rotary plate of the ear protector and having two bistable positions.
- One problem to be solved by the known ear protection is seen in retaining the supporting bracket including the ear protection capsule in the parking position since the ear protection capsule, due to gravity, strives to rotate downwards and back into the standby position from the parking position. To prevent such a downwards rotation, it was common that the user pivots the supporting bracket to the inside in its parking position in which it is tilted upwards so that the bistable leaf spring presses the ear protection capsule to the helmet shell from the outside. In this way, relatively large forces were generated on the helmet, for example, at the mount of the supporting bracket on the helmet, which gave rise to the risk that the helmet and/or the supporting bracket were damaged. The known ear protection is therefore formed so that a safe positioning of each ear protection capsule in an upturned parking position outside of the helmet is effected. To this end, the receiving part comprises a projection protruding substantially parallel to the axis of rotation which restricts a movement of the rotary plate in a specific rotational position when abutting to the supporting bracket in the known ear protection. In the known ear protection, the solution of the problem is complicated by the use of a bistable leaf spring which is, indeed, supposed to render it possible that the supporting bracket, together with the ear protection capsule, occupies a defined extended or retracted posture in the operating or standby position, but, at the same time serves to jointedly connect the supporting bracket to the rotary plate and can therefore not have an exactly defined tilting point and cannot ensure a defined exertion of pressure on the ear by the ear protection capsule in case of different head sizes of helmet users. Since the jointed connection between the supporting bracket and the rotary plate is only established by the bistable leaf spring and depends on its two bistable end positions, the supporting bracket neither has an exactly defined extended position nor an exactly defined retracted position which impedes an adjustment of the ear protection to different head sizes.
- The fixation of the ear protector in the parking position is effected with the aid of a stopper supported by the leaf spring abutting on a projection of the receiving part. However, this support is dependent on the friction of the leaf spring on the projection and may therefore change in the course of time. The force in the direction towards the operating position required on the rotary plate to move the mentioned stopper out of engagement may therefore decrease in the course of time so that the user might, nevertheless, attempt to prevent an undesired downwards rotation of the supporting bracket with the aid of the ear protection capsule by pivoting the ear protectors inwards on the outside of the helmet in the parking position so that the ear protection capsule is pressed against the helmet shell from the outside.
- It is the object of the invention to design an ear protection of the type mentioned in the beginning so that the abovementioned problems are eliminated, i.e., in particular that the risk that a helmet may get caught on obstacles in use due to the ear protection attached to it and that an ear protector may unintentionally rotate back into the protecting position from the parking position is removed.
- According to the invention, this object is solved by the supporting bracket and the rotary plate being connected to each other by a tilting joint, a tilting axis of which penetrates the supporting bracket and the rotary plate, by a yoke spring disposed adjacent to the tilting joint between the rotary plate and a free end of the supporting bracket pre-stressing the supporting bracket to abut on additional stoppers defining the extended and the retracted position to thereby effect its bistable tiltability and by the receiving part being designed for an attachment on the inside of a helmet.
- According to the invention, the receiving part is mounted on the inside of a helmet so that the ear protection capsules and the associated supporting brackets are located substantially within the perimeter of the protective helmet. The helmet therefore does not offer any possibilities for obstacles such as branches and the like to get caught on its outside. If the ear protection is not required, the ear protectors may be rotated backwards into the parking position which is located within the helmet within the perimeter of the protective helmet.
- Due to the attachment of the receiving part of each ear protector on the inside of the helmet, particularly on the inside of the helmet shell, in addition to the supporting brackets and the ear protection capsules, the receiving parts are also protected against an external exertion of a force by obstacles the helmet may contact. Furthermore, the supporting brackets are pivotable between the standby position and the parking position within a clearance between helmet shell and interior fittings due to the receiving parts being mounted on the inside of the helmet, i.e., they are always located within the perimeter of the helmet shell. Accordingly, the supporting bracket and the ear protection capsules do not offer any catching or engagement points for obstacles in either position.
- Due to the fact that in each ear protector of the ear protection according to the invention the supporting bracket and the rotary plate are connected to each other by a tilting joint a tilting axis of which penetrates the supporting bracket and the rotary plate, the drawbacks resulting from a bistable leaf spring being used for jointedly connecting the supporting bracket to the rotary plate are eliminated. In the ear protection according to the invention, the tilting axis constitutes a defined centre of rotation which does not change in the course of time. Furthermore, according to the invention, the yoke spring being located adjacent to the tilting joint between the rotary plate and a free end of the supporting bracket and pre-stressing the supporting bracket only ensures the build-up of a force between the supporting bracket and the rotary plate, i.e., it does not simultaneously define the extended and the retracted position of the supporting bracket. These positions are rather determined by defined stoppers. The yoke spring only provides the force for moving the supporting bracket towards these stoppers. The yoke spring together with the other stoppers therefore establishes defined end positions for the supporting bracket when it is extended and retracted and thus ensures its bistable tiltability between defined stoppers.
- In the ear protection according to the invention, the yoke spring does not have the function of a joint supporting the supporting bracket but only serves to build up a force with the aid of which the supporting bracket can be retained in a defined extended and in a defined retracted position on the additional stoppers. The problem of an undesired downward rotation of the ear protector from the parking position downwards in the direction of the standby position is strongly reduced if not eliminated by the ear protection according to the invention because the ear protection capsule will be positioned on the inside of the helmet and on the outside of interior fittings of the helmet in the parking position and will therefore have a substantially reduced tendency to rotate downwards from the parking position as a result of pressure from both sides.
- Advantageous embodiments of the ear protection according to the invention constitute the subject matter of the subclaims.
- In one embodiment of the ear protection according to the invention, an eccentric bolt for adjusting the initial load applied to the supporting bracket by the yoke spring is rotatably arranged in the rotary plate and in contact with the yoke spring. It is therefore possible to adjust the magnitude of the force with which the ear protection capsule is pressed against the ear in the retracted position of the supporting bracket in a simple manner.
- In a further embodiment of the ear protection according to the invention, a slide pre-stressed in the direction towards the rotary plate by a pressure spring is shiftably supported at the free end of the supporting bracket, said slide comprising a retaining lug which can be brought in contact with a slide path on the receiving part and being prevented from being shifted in its retracted position and not being prevented from being shifted in its extended position by the supporting bracket and releasably retaining the supporting bracket in its parking position by means of an engagement in a recess in the slide path of the receiving part. The spring pre-stressed slide is, in this embodiment of the invention, retained in engagement with the rotary disk in a position in which the free end of the supporting bracket engages in a recess of the slide. The recess of the slide thus forms one of the additional stoppers defining the retracted position of the supporting bracket. On the other hand, the free end of the supporting bracket abuts to the rotary disk in a recess which consequently constitutes one of the other stoppers and defines the extended position of the supporting bracket. In this latter position, the slide is shiftable on the supporting bracket along the slide path on the receiving part in the direction opposite to the rotary plate against the force of the pressure spring so that the supporting bracket including the rotary plate can be pivoted in the receiving part and the supporting bracket including the ear protection capsule can be located in the parking position.
- In a further embodiment of the ear protection according to the invention, a groove extending at least over a semi-circle for accommodating a circular arc-shaped shoulder of the rotary plate is formed in the receiving part. The rotary plate is guided in the receiving part during its rotation.
- In a further embodiment of the ear protection according to the invention, a resilient tongue protruding from the receiving part engages in a complementary depression in the rotary plate for locking the mutual engagement of the receiving part and the rotary plate, and a push button for releasing the fixation is arranged in the rotary plate. The supporting bracket may, in this way, be locked in place by a snap-on fastening together with its rotary plate in the receiving part and released by operating the push button.
- Embodiments of the invention will be described in more detail below with reference to the drawings in which:
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FIG. 1 shows a protective helmet comprising an ear protection according to the invention, a helmet shell being shown in a sectional view and two ear protectors constituting the ear protection being shown in a standby position, i.e., pivoted away from the ears, -
FIG. 2 shows the protective helmet according toFIG. 1 , the ear protectors, however, being shown in an operating position, i.e., retracted on the ears; -
FIG. 3 shows a side view of the protective helmet according toFIG. 2 ; -
FIG. 4 shows the protective helmet according toFIG. 3 , the ear protection according to the invention, however, being pivoted into a parking position and accommodated within the helmet; -
FIG. 5 shows the protective helmet according toFIG. 4 in a view from below, only one ear protector of the ear protection according to the invention on one side a being shown; -
FIG. 6 shows a face view of one of the two ear protectors of the ear protection according to the invention; -
FIG. 7 shows a front view of the ear protector according toFIG. 6 ; -
FIG. 8 shows the ear protector according toFIGS. 6 and 7 in a side view and in the standby position; -
FIG. 9 shows a rear view of the ear protector according toFIG. 6 ; -
FIG. 10 shows a longitudinal sectional view of the upper part of the ear protector according toFIG. 8 ; -
FIG. 11A shows the upper part of the ear protector according toFIG. 7 together with a receiving part and pivoted into the parking position; -
FIG. 11B shows a side view of the ear protector according toFIG. 11A ; -
FIG. 12A shows the ear protector according toFIG. 11A pivoted back into the standby position; -
FIG. 12B shows a side view of the ear protector according toFIG. 12A ; -
FIG. 13A shows the ear protector according toFIG. 12A , however, in the operating position; -
FIG. 13B shows the ear protector according toFIG. 13A in a side view; and -
FIG. 14 shows, as a detail, the helmet shell of the protective helmet according toFIG. 5 in a perspective representation and in an inclined view from below, the interior fittings not being shown and a receiving part of only one ear protector which is attached to the inside of the helmet shell being shown for the sake of clearness. - A protective helmet designated by 30 in its entirety and comprising an
ear protection 33 according to the invention which is designed, particularly for use in forestry, is shown in different views inFIGS. 1 to 5 and 14. Theear protection 33 comprises twoear protectors protective helmet 30 comprises ahelmet shell 36 and interior fitting subassembly designated by 40 as a whole and comprising a supportingcage 42, ahead band 44, and aneck band 46. Theneck band 46 is provided with a tightening unit designated by 48 as a whole. - Three supporting arms formed as spacers of which only the supporting
arms FIGS. 1 and 2 serve as means for a three-point attachment of the interior fittings or the interiorfitting subassembly 40 to thehelmet shell 36. Thehelmet shell 36 is dimensioned so (i.e., its interior width is dimensioned so long and so broad) and the supporting arms are dimensioned and arranged so that aclearance 60 for accommodatingear protection capsules ear protectors ear protection 33 is present between the interiorfitting subassembly 40 and thehelmet shell 36. The other helmet accessories include theabovementioned tightening unit 48 of theneck band 46. In relation to theear protection 33, theclearance 60 is determined so that theear protection capsules helmet shell 36 and to the outside of the interiorfitting subassembly 40 in the parking position as can be seen inFIG. 5 . - A mounting device for the
ear protection 33 comprises two receivingparts helmet shell 36. The receivingparts brackets ear protection capsules parts helmet shell 36 as a bearing cup of the pivot bearings or, preferably, fixedly mounted as additional parts. - The
ear protection 33 will now be described in more detail with reference to the drawings, particularly toFIGS. 1-5 and 14.FIG. 14 shows thehelmet shell 36 without the interiorfitting subassembly 40 in an inclined view from below, particularly the position of the receivingpart 80 a on the inside of thehelmet shell 36 being illustrated. The other receivingpart 80 b which cannot be seen is inversely attached to the opposite side.FIG. 1 shows theprotective helmet 30 with theear protection 33 provided on both sides, thehelmet shell 36 being shown in a sectional view, and theear protectors FIG. 2 shows the protective helmet according toFIG. 1 , theear protectors FIG. 3 shows a side view of the protective helmet according toFIG. 2 .FIG. 4 shows the protective helmet according toFIG. 3 , theear protectors helmet 30. - The two
ear protectors ear protection capsules bracket helmet shell 36 is provided with the fixedly attached receivingparts parts brackets rotary plates 39 a or 39 b jointedly attached to their free ends as can be seen inFIGS. 6 to 13 . The receivingparts brackets brackets clearance 60, namely, the operating position shown inFIGS. 2 and 3 in which theear protection capsules FIG. 4 in which theear protection capsules clearance 60 in thehelmet 30. - Each supporting
bracket clearance 60 so that theear protection capsules bracket FIG. 1 , and pivoted onto the ear in the bent position of the supportingbracket FIG. 2 . If theprotective helmet 30 is not placed on the head, the twoear protection capsules ear protection capsule ear protection capsules helmet 30 is put on. The spring pre-load for bending each supportingbracket bended yoke spring 92 a, 92 b (as can be seen, for example, inFIG. 7 ). Each supportingbracket yoke spring 92 a or 92 b effects an end position lock in cooperation with a stopper described further below, respectively. The end position lock of the supportingbracket ear protection capsule - In addition, each receiving
part bracket rotary plate 39 a, 39 b are formed so that the supporting bracket can only be pivoted backwards from the position shown inFIG. 1 . In this way, it is ensured that theear protection capsules clearance 60 behind the ear without colliding with the ears and the lower edge of thehelmet shell 36.FIG. 6 shows a rear view of theear protectors 34 a,b of theear protection 33. Theear protectors helmet 30. The only thing different is the design of the receivingpart 80 a, b since it has an increasingly descendingslide path 86 a,b in a rearward direction. The receivingpart 80 a is shown inFIG. 14 . The receivingpart 80 a is also shown inFIGS. 11-13 . - According to the representation in
FIG. 7 theear protection capsule 35 a, b is pivotably supported on the fork-like supportingbracket 37 a,b. Arotary plate 39 a, b is jointedly connected to the supportingbracket 37 a,b by means of a tilting joint 82 a,b which can be seen inFIG. 8 . The tilting joint 82 a,b is formed as a tiltingaxis 84 a,b formed as a rod-like axis inserted in holes in the supportingbracket 37 a,b and therotary plate 39 a,b, thus penetrates the supporting bracket and the rotary plate. Owing to the existing tilting joint 82 a,b the supportingbracket 37 a,b can be tilted into the extended position (standby position) and into the retracted position (operating position) if theear protector 34 a, b is located in its position on the ear. In the operating position shown inFIG. 13 , theear protection capsule 35 a,b abuts on the ear. Alternatively, theear protector 34 a,b may occupy the standby position in which it is extended, i.e., in which the ear protection capsule is not pressed against the ear. This standby position is shown inFIG. 12 . In the operating position according toFIG. 13 , theear protector 34 a,b is only pivotable in a reduced angular range. In the standby position according toFIG. 12 , theear protector 34 a,b is pivotable into the parking position shown inFIG. 11 . The receivingpart 80 a,b which is usually fixedly attached to the inside of thehelmet 30, to be more precise, on the inside of thehelmet shell 36, is also shown inFIGS. 10-13 for explanatory reasons. Therotary plate 39 a,b is rotatably supported in the receivingpart 80 a,b and pivotable between the standby position according toFIG. 12 and the parking position according toFIG. 11 . The operating position and the parking position are defined by stoppers which will be described in more detail below. - In the standby position of the
ear protector 34 a,b shown inFIG. 12 , thefree end 38 a, b of the supportingbracket 37 a,b which is pivoted away from the ear is retained on astopper 41 a,b by the pre-stressing force of theyoke spring 92 a,b formed by acover plate 51 a,b rigidly connected to therotary plate 39 a,b. The initial load of theyoke spring 92 a,b keeps the supportingbracket 37 a, b stably abutting on thestopper 41 a, b. Opposite to thestopper 41 a,b, the receivingpart 80 a, b has arecess 89 a, b in which thefree end 38 a,b of the supportingbracket 37 a,b is pivotable from the standby position shown inFIG. 12B into the operating position shown inFIG. 13B . A wall of the receivingpart 80 a,b facing thestopper 41 a,b forms anotherstopper 43 a,b on which thefree end 38 a,b of the supportingbracket 37 a,b is held by the initial load of theyoke spring 92 a,b in the operating position shown inFIG. 13B . The supportingbracket 37 a,b hinged to therotary plate 39 a,b blocks a rotation of the supportingbracket 37 a,b into the parking position shown inFIG. 11 with itsfree end 38 a, b in the operating position. - The pivotability and non-pivotability of the
rotary plate 39 a,b are determined by aslide 98 a,b shown in a sectional view inFIGS. 10-13 . Theslide 98 a,b is shiftably supported on an extension of therotary plate 39 a,b above thefree end 38 a,b of the supportingbracket 37 a,b and pre-stressed by apressure spring 98 a,b in the direction towards therotary plate 39 a, b. The receivingpart 80 a, b is provided with aslide path 86 a,b at its lower edge. InFIGS. 10-13 , only the receivingpart 80 a mounted on the left inner face of the helmet is shown. Accordingly, the slide path is only designated by 86 a in these Figures. Theslide 98 a,b comprises a retaining lug 104 a,b which can be brought in contact with theslide path 86 a,b at the receivingpart 80 a,b and is prevented from being shifted by the supportingbracket 37 a,b in its retracted position according toFIG. 13B but is not prevented from being shifted in its extended position according toFIGS. 11 and 12 . Theslide 98 a,b is not prevented from being shifted by the supportingbracket 37 a,b placed in the extended position and releasably retains the supportingbracket 37 a,b in its parking position by the engagement in arecess 87 a, b in theslide path 86 a,b of the receivingpart 80 a,b. Theslide 98 a,b is shifted by the rotational movement from the standby position according toFIG. 12 into the parking position according toFIG. 11 . The shifted slide 98 a,b does no longer permit the supportingbracket 37 a,b to be pivoted in the direction of the operating position, i.e., in the direction of the retracted position of the supportingbracket 37 a,b. In the standby position according toFIG. 12 , theslide 98 a, b is free, and the supportingbracket 37 a,b is therefore pivotable into the parking position according toFIG. 11 . In the operating position according toFIG. 13 , theslide 98 a, b is not shiftable so that the supportingbracket 37 a,b including theear protection capsule 35 a,b is not pivotable into the parking position. This pivotability is only given again if the supportingbracket 37 a,b is pivoted back into the standby position according toFIG. 12 in which thefree end 38 a,b of the supportingbracket 37 a,b does not abut on thestopper 88 a, b from the operating position according toFIG. 13 . - In the receiving
part 80 a,b, agroove 85 a,b is formed which extends over at least a semi-circle and serves to accommodate a circular arc-shapedshoulder 49 a,b of therotary plate 39 a,b as can be seen inFIG. 10 . InFIG. 10 , it can be further seen that the receivingpart 80 a,b comprises aresilient tongue 81 a,b protruding towards therotary plate 39 a,b. Theresilient tongue 81 a, b engages in acomplementary depression 83 a,b in therotary plate 39 a, b to lock the mutual engagement of the receivingpart 80 a,b and therotary plate 39 a,b. In therotary plate 39 a,b, a push button 50 a b for releasing the restraint is provided. When operating thepush button 50 a,b inFIG. 9 , theresilient tongue 81 a,b inFIG. 10 is pushed to the right whereby the snap-on fastening between the receivingpart 80 a, b and therotary plate 39 a,b is released again. - Each
ear protection capsule 35 a,b is concavely curved in the longitudinal direction on its side facing the ear so that it can more readily adjust to the shape of the ear and the head. This results in an improved pressure distribution on the ear and enables a better closure against the entry of noise in combination with a reduced application of pressure. -
- 30 protective helmet
- 33 ear protection
- 34 a,b ear protector
- 35 a,b ear protection capsule
- 36 helmet shell
- 37 a,b supporting bracket
- 38 a,b free end
- 39 a,b rotary plate
- 40 interior fitting subassembly
- 41 a,b stopper (standby position, supporting bracket)
- 42 supporting cage
- 43 a,b additional stopper (operating position, supporting bracket)
- 44 head band
- 46 neck band
- 48 tightening unit
- 49 a,b circular arc-shaped shoulder
- 50 a,b push button
- 51 a,b cover plate
- 54 supporting arm
- 55 supporting arm
- 60 clearance
- 80 a,b receiving part
- 81 a,b resilient tongue
- 82 a,b tilting joint
- 83 a,b complementary depression
- 84 a,b tilting axis
- 85 a,b groove
- 86 a,b slide path
- 87 a,b recess
- 88 a,b retaining lug
- 89 a,b recess
- 92 a,b yoke spring
- 94 a b eccentric bolt
- 96 a,b pressure spring
- 98 a,b slide
Claims (5)
1. An ear protection to be fastened to a protective helmet comprising two ear protectors each of which comprises:
a fork-like supporting bracket on which an ear protection capsule is pivotably supported,
a rotary plate jointedly connected to the supporting bracket in relation to which the supporting bracket can be bistably tilted into an extended and into a retreated position, and
a receiving part attachable or attached a to a helmet in which the rotary plate is rotatably supported and pivotable between a protecting position and a parking position defined by stoppers,
wherein the supporting bracket and the rotary plate are connected to each other by a tilting joint a tilting axis of which penetrates the supporting bracket and the rotary plate,
in that a yoke spring disposed adjacent to the tilting joint between the rotary plate and a free end of the supporting bracket pre-stresses the supporting bracket to abut on further stoppers defining the extended and the retracted position and ensures its bistable tiltability in this way, and
in that the receiving part is designed to be attached to the inside of a helmet.
2. The ear protection according to claim 1 , wherein an eccentric bolt rotatably disposed in the rotary plate and in contact with the yoke spring for adjusting the initial load applied to the supporting bracket by the yoke spring.
3. The ear protection according to claim 1 , wherein at the free end of the supporting bracket, a slide pre-stressed in the direction towards the rotary plate by a pressure spring is shiftably supported on an extension of the rotary plate which comprises a retaining lug which can be brought in contact with a slide path on the receiving part and is prevented from shifting by the supporting bracket in its retracted position and not prevented from shifting by the supporting bracket in its extended position and releasably retains the supporting bracket in its parking position by means of an engagement in a recess in the slide path of the receiving part.
4. The ear protection according to claim 1 , wherein by a groove which is formed in the receiving part and extends over at least a semi-circle for receiving a circular arc-shaped shoulder of the rotary plate.
5. The ear protection according to claim 4 , wherein a resilient tongue protruding from the receiving part for engaging in a complementary depression in the rotary plate for locking the mutual engagement of the receiving part and the rotary plate and for releasing the retainment by means of a push button disposed in the rotary plate.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010026997A DE102010026997A1 (en) | 2010-07-13 | 2010-07-13 | Hearing protection for attachment to a protective helmet, in particular for forestry workers |
DE102010026997.2 | 2010-07-13 | ||
PCT/EP2011/061882 WO2012007475A1 (en) | 2010-07-13 | 2011-07-12 | Ear defenders for fastening to a protective helmet, in particular for forestry workers |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130219598A1 true US20130219598A1 (en) | 2013-08-29 |
Family
ID=44509811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/808,803 Abandoned US20130219598A1 (en) | 2010-07-13 | 2011-07-12 | Ear defenders for fastening to a protective helmet, in particular for forestry workers |
Country Status (23)
Country | Link |
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US (1) | US20130219598A1 (en) |
EP (1) | EP2506731B8 (en) |
JP (1) | JP6046614B2 (en) |
KR (1) | KR101906611B1 (en) |
CN (1) | CN103037725B (en) |
AU (1) | AU2011278351B2 (en) |
BR (1) | BR112013000582B1 (en) |
CA (1) | CA2804479C (en) |
CL (1) | CL2013000121A1 (en) |
DE (1) | DE102010026997A1 (en) |
DK (1) | DK2506731T3 (en) |
EA (1) | EA025775B1 (en) |
ES (1) | ES2450146T3 (en) |
HR (1) | HRP20140165T1 (en) |
MX (1) | MX2013000462A (en) |
MY (1) | MY184589A (en) |
NZ (1) | NZ606390A (en) |
PE (2) | PE20131199A1 (en) |
PL (1) | PL2506731T3 (en) |
SI (1) | SI2506731T1 (en) |
UA (1) | UA107842C2 (en) |
WO (1) | WO2012007475A1 (en) |
ZA (1) | ZA201300325B (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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US20130191974A1 (en) * | 2012-01-27 | 2013-08-01 | Stephane Lebel | Helmet earpiece |
US20150040295A1 (en) * | 2012-01-11 | 2015-02-12 | Pfanner Schutzbekleidung Gmbh | Safety helmet, in particular for mountain climbers and tree climbers |
US20150041243A1 (en) * | 2013-08-09 | 2015-02-12 | Larry D. Ratliff | Cap hearing protection system |
USD741550S1 (en) | 2014-05-02 | 2015-10-20 | 3M Innovative Properties Company | Ear muff attachment arm |
WO2016141210A1 (en) * | 2015-03-03 | 2016-09-09 | Valley Children's Healthcare | Cranium cuddler |
US20160324248A1 (en) * | 2014-01-14 | 2016-11-10 | Artisent, Llc | Pivot-Arm Assembly for a Helmet Mounted Headset |
KR20160148014A (en) * | 2014-05-02 | 2016-12-23 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Ear muff attachment having dual axis of rotation |
EP3340643A1 (en) * | 2016-12-21 | 2018-06-27 | Safariland, LLC | Rail connector for earcup suspension assembly |
US20180199652A1 (en) * | 2017-01-16 | 2018-07-19 | Safariland, Llc | Wireform Attachment Mechanism |
WO2018156666A1 (en) * | 2017-02-21 | 2018-08-30 | Unit 1 Gear Llc | Headphone and helmet assembly |
USD866084S1 (en) * | 2018-05-18 | 2019-11-05 | Gentex Corporation | Headset mount arm |
USD876017S1 (en) * | 2017-05-10 | 2020-02-18 | 3M Innovative Properties Company | Attachment arm |
US20200170329A1 (en) * | 2018-12-03 | 2020-06-04 | Msa Technology, Llc | Helmet with Accessory Attachment Rail |
US10881162B2 (en) | 2015-05-07 | 2021-01-05 | Exero Labs LLC | Device for minimizing impact of collisions for a helmet |
US10905593B2 (en) | 2016-01-04 | 2021-02-02 | Pfanner Schutzbekleidung Gmbh | Ear protection device, communications system and protective helmet |
US20210267299A1 (en) * | 2018-07-06 | 2021-09-02 | Msa Europe Gmbh | Hearing protection device |
US20230172304A1 (en) * | 2017-01-25 | 2023-06-08 | Bell Sports, Inc. | Helmet with integrated shoulder pad |
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US9596902B2 (en) * | 2014-05-30 | 2017-03-21 | 3M Innovative Properties Company | Earmuff accommodating welding shield |
CN107462356B (en) * | 2017-08-08 | 2023-03-14 | 贵州大学 | Mine pressure gauge protection device |
RU190133U1 (en) * | 2018-12-21 | 2019-06-21 | Общество с ограниченной ответственностью "СТ-Логистик" | EARPHONE |
DE102022123348A1 (en) | 2022-09-13 | 2024-03-14 | Schuberth Gmbh | Hard hat |
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- 2011-07-12 EA EA201300114A patent/EA025775B1/en not_active IP Right Cessation
- 2011-07-12 SI SI201130122T patent/SI2506731T1/en unknown
- 2011-07-12 JP JP2013519078A patent/JP6046614B2/en active Active
- 2011-07-12 MY MYPI2013700058A patent/MY184589A/en unknown
- 2011-07-12 KR KR1020137003446A patent/KR101906611B1/en active IP Right Grant
- 2011-07-12 PE PE2013000064A patent/PE20131199A1/en not_active Application Discontinuation
- 2011-07-12 CA CA2804479A patent/CA2804479C/en active Active
- 2011-07-12 PE PE2014002216A patent/PE20150298A1/en active IP Right Grant
- 2011-07-12 MX MX2013000462A patent/MX2013000462A/en active IP Right Grant
- 2011-07-12 EP EP11731354.4A patent/EP2506731B8/en active Active
- 2011-07-12 AU AU2011278351A patent/AU2011278351B2/en active Active
- 2011-07-12 PL PL11731354T patent/PL2506731T3/en unknown
- 2011-07-12 DK DK11731354.4T patent/DK2506731T3/en active
- 2011-07-12 ES ES11731354.4T patent/ES2450146T3/en active Active
- 2011-07-12 WO PCT/EP2011/061882 patent/WO2012007475A1/en active Application Filing
- 2011-07-12 US US13/808,803 patent/US20130219598A1/en not_active Abandoned
- 2011-07-12 BR BR112013000582-3A patent/BR112013000582B1/en active IP Right Grant
- 2011-07-12 NZ NZ606390A patent/NZ606390A/en unknown
- 2011-12-07 UA UAA201301671A patent/UA107842C2/en unknown
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2013
- 2013-01-11 CL CL2013000121A patent/CL2013000121A1/en unknown
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US3864756A (en) * | 1972-12-18 | 1975-02-11 | Us Navy | Adjustable earmuffs |
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Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9113671B2 (en) * | 2012-01-11 | 2015-08-25 | Pfanner Schutzbekleidung Gmbh | Safety helmet, in particular for mountain climbers and tree climbers |
US20150040295A1 (en) * | 2012-01-11 | 2015-02-12 | Pfanner Schutzbekleidung Gmbh | Safety helmet, in particular for mountain climbers and tree climbers |
US9693595B2 (en) * | 2012-01-27 | 2017-07-04 | Revision Military S.A.R.L. | Helmet earpiece |
US20130191974A1 (en) * | 2012-01-27 | 2013-08-01 | Stephane Lebel | Helmet earpiece |
US20150041243A1 (en) * | 2013-08-09 | 2015-02-12 | Larry D. Ratliff | Cap hearing protection system |
US9339075B2 (en) * | 2013-08-09 | 2016-05-17 | Larry D. Ratliff | Cap hearing protection system |
US20160324248A1 (en) * | 2014-01-14 | 2016-11-10 | Artisent, Llc | Pivot-Arm Assembly for a Helmet Mounted Headset |
US10617168B2 (en) * | 2014-01-14 | 2020-04-14 | Gentex Corporation | Pivot-arm assembly for a helmet mounted headset |
USD741550S1 (en) | 2014-05-02 | 2015-10-20 | 3M Innovative Properties Company | Ear muff attachment arm |
KR20160148014A (en) * | 2014-05-02 | 2016-12-23 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Ear muff attachment having dual axis of rotation |
KR102386680B1 (en) * | 2014-05-02 | 2022-04-14 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Ear muff attachment having dual axis of rotation |
US10959477B2 (en) | 2014-05-02 | 2021-03-30 | 3M Innovative Properties Company | Ear muff attachment having dual axis of rotation |
WO2016141210A1 (en) * | 2015-03-03 | 2016-09-09 | Valley Children's Healthcare | Cranium cuddler |
US10315001B2 (en) | 2015-03-03 | 2019-06-11 | Valley Children's Healthcare | Cranium cuddler |
US10881162B2 (en) | 2015-05-07 | 2021-01-05 | Exero Labs LLC | Device for minimizing impact of collisions for a helmet |
US10905593B2 (en) | 2016-01-04 | 2021-02-02 | Pfanner Schutzbekleidung Gmbh | Ear protection device, communications system and protective helmet |
EP3340643A1 (en) * | 2016-12-21 | 2018-06-27 | Safariland, LLC | Rail connector for earcup suspension assembly |
US10582736B2 (en) * | 2017-01-16 | 2020-03-10 | Safariland, Llc | Wireform attachment mechanism |
US20180199652A1 (en) * | 2017-01-16 | 2018-07-19 | Safariland, Llc | Wireform Attachment Mechanism |
US20230172304A1 (en) * | 2017-01-25 | 2023-06-08 | Bell Sports, Inc. | Helmet with integrated shoulder pad |
WO2018156666A1 (en) * | 2017-02-21 | 2018-08-30 | Unit 1 Gear Llc | Headphone and helmet assembly |
US10791788B2 (en) | 2017-02-21 | 2020-10-06 | Unit 1 Gear, Inc. | Headphone and helmet assembly |
US10398188B2 (en) * | 2017-02-21 | 2019-09-03 | Unit 1 Gear, Inc. | Headphone and helmet assembly |
USD876017S1 (en) * | 2017-05-10 | 2020-02-18 | 3M Innovative Properties Company | Attachment arm |
USD866084S1 (en) * | 2018-05-18 | 2019-11-05 | Gentex Corporation | Headset mount arm |
USD911626S1 (en) | 2018-05-18 | 2021-02-23 | Gentex Corporation | Headset mount arm |
US20210267299A1 (en) * | 2018-07-06 | 2021-09-02 | Msa Europe Gmbh | Hearing protection device |
US11771169B2 (en) * | 2018-07-06 | 2023-10-03 | Msa Europe Gmbh | Hearing protection device |
US10912344B2 (en) * | 2018-12-03 | 2021-02-09 | Msa Technology, Llc | Helmet with accessory attachment rail |
US20200170329A1 (en) * | 2018-12-03 | 2020-06-04 | Msa Technology, Llc | Helmet with Accessory Attachment Rail |
Also Published As
Publication number | Publication date |
---|---|
KR20130135231A (en) | 2013-12-10 |
BR112013000582A2 (en) | 2016-07-05 |
CA2804479C (en) | 2018-03-20 |
CL2013000121A1 (en) | 2013-07-19 |
KR101906611B1 (en) | 2018-10-10 |
JP2013531148A (en) | 2013-08-01 |
UA107842C2 (en) | 2015-02-25 |
CA2804479A1 (en) | 2012-01-19 |
EP2506731A1 (en) | 2012-10-10 |
PE20131199A1 (en) | 2013-11-20 |
MY184589A (en) | 2021-04-06 |
CN103037725A (en) | 2013-04-10 |
PE20150298A1 (en) | 2015-03-04 |
AU2011278351A1 (en) | 2013-02-14 |
AU2011278351B2 (en) | 2016-06-09 |
PL2506731T3 (en) | 2014-05-30 |
HRP20140165T1 (en) | 2014-03-28 |
EA201300114A1 (en) | 2013-07-30 |
JP6046614B2 (en) | 2016-12-21 |
CN103037725B (en) | 2015-11-25 |
EA025775B1 (en) | 2017-01-30 |
ES2450146T3 (en) | 2014-03-24 |
ZA201300325B (en) | 2014-03-26 |
NZ606390A (en) | 2015-02-27 |
MX2013000462A (en) | 2013-12-02 |
WO2012007475A1 (en) | 2012-01-19 |
SI2506731T1 (en) | 2014-04-30 |
DE102010026997A1 (en) | 2012-01-19 |
EP2506731B8 (en) | 2015-11-04 |
EP2506731B1 (en) | 2013-12-04 |
BR112013000582B1 (en) | 2020-09-29 |
DK2506731T3 (en) | 2014-03-03 |
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Owner name: PFANNER, ANTON, AUSTRIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GREBER, MARTIN;REEL/FRAME:030162/0095 Effective date: 20130215 |
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