CN103037725B - Ear protection fastened to a protective helmet specially for forestry workers - Google Patents

Abstract

An ear protector (33) for fastening to a protective helmet (30), in particular for forestry workers, is described. The ear protector (33) comprises two ear protectors (34 a, 34 b), each having: a supporting strap (37 a, 37 b) which is designed in a fork-like manner and has a ear protection capsule pivotably mounted thereto; and a rotating plate which is connected to the support bands (37 a, 37 b) by means of an inclined joint, and the support bands (37 a, 37 b) can be bidirectionally stably inclined relative to the rotating plate into a swung-out position and a swung-in position. The rotating plate is rotatably mounted in a receiving portion (80 a, 80 b) attached to a helmet (30). A strap spring arranged between the rotary plate and the support strap (37 a, 37 b) prestresses the support strap (37 a, 37 b) to bear against stops that fix the swing-out position and the swing-in position of the support strap. The receiving part (80 a, 80 b) is attached on the inside on the helmet (30). The ear protection (34 a, 34 b) can thus be rotated into a parking position within the helmet.

Description

Ear protection fastened to a protective helmet specially for forestry workers

technical field

The present invention relates to an ear protection device intended to be fastened to a protective helmet, in particular for forestry workers, the ear protection device comprising two ear protectors each comprising: a forked support bracket, the ear protection devices being pivotably supported on the forked support bracket; a rotating plate, which is jointedly connected to the support bracket, the support bracket being bi-directionally stable (bistably) relative to the rotating plate ) tilts into an extended position and a retracted position; and a receiving portion, which can be attached or be attached to a helmet, in which the rotating plate is rotatably supported, and which can be Pivoting between an operating position defined by a stop and a rest position.

Background technique

Such an ear protection device is known from DE 10 2007 011 110 A1 to be referred in more detail further below.

A protective helmet comprising such ear protection is known from document DE8714490U1. The protective helmet consists of a helmet shell and internal fittings. The inner fitting is constituted by a cross strap with 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 surrounding the lateral and rear parts of the helmet, which protrusion is provided with four recesses for fastening the cross straps and other recesses for fastening further attachment elements at the lower edge . These additional attachment elements can be added or removed as desired. At the widest point of the helmet, the recess is provided on the outside of the protrusion surrounding the largest part of the helmet. In particular, this is the attachment location for the ear protection. The ear protector is composed of two ear protectors including a wire holder and an ear protector, respectively. Together with the face protector, the ear protector is secured to the outside of the helmet with common connectors inserted into the protrusions. It is disadvantageous in a helmet equipped like this that, in use, the obstacle through which the helmet passes engages behind the brackets of the ear protectors and in this way hinders the wearer of the helmet at work or possibly from his or her The head tears off the helmet and thereby puts the wearer at risk.

An ear protection device known from DE 10 2007 011 110 A1 already mentioned at the outset comprises means for attaching ear protection cups to the outside of a protective helmet. Here, reference is made to a protective helmet in which the helmet design is customized by default so that two ear protectors can be placed on each side of the helmet, at the edge of the helmet, in slots provided in the helmet Medium, above the ear position are releasably attached to the outside of the helmet. For this purpose, the receiving part or each ear protector is formed such that it can be fixed in the slot with a snap fastening. The ear protector is worn during work in an operative position in which the ear protector is in a retracted position in which it abuts tightly against the ear. If the ear protector is temporarily not needed, the ear protector can be moved from the operating position into the standby position. In this position, the ear protection is in an extended position in which it is still positioned over the ear but is pivoted outward away from the ear. The ear protectors can also be held in this position, for example to enable conversations during work. Finally, there is a stop or rest position for the ear defenders. In the rest position, the ear protectors are pivoted upwards from the operating position towards the rear and lie on the outside of the helmet. In order for the ear protectors to be able to be moved over the rim of the helmet into the rest position, it is first necessary to place the ear protectors in the standby position. It is possible to hold each earmuff in the extended or retracted position by means of a double-tongued leaf spring which connects the support bracket of the earmuffs to the swivel plate of the eardefender in a jointed manner and has Two two-way stable positions.

One problem to be solved by known ear protection devices is to maintain the support bracket including the ear protection cups in the rest position, since the ear protection cups tend to rotate downwards due to gravity and return from the rest position into the standby position. In order to prevent this downward rotation, it is common for the user to pivot the support bracket to the inside in its resting position in which it is tilted upwards, so that the two-way stabilizing leaf spring holds the earmuffs from the outside Squeeze into the helmet shell. In this way, for example, relatively high forces are generated on the helmet when mounting the support bracket on the helmet, which creates a risk of damage to the helmet and/or the support bracket. The known ear protectors are thus formed in such a way that a secure positioning of each ear cup in the upwardly turned rest position on the outside of the helmet is achieved. To this end, the receiving portion comprises a projection which protrudes substantially parallel to the axis of rotation and which, when abutting against a support bracket in known ear protection devices, limits the movement of the rotating plate in a particular rotational position. In the known ear protectors, the solution to the problem is complicated by the use of bidirectionally stable leaf springs, which in fact are supposed to enable the support bracket together with the ear protectors to assume a defined position in the operating position or in the standby position. extended or retracted position, but at the same time serve to connect the support bracket to the swivel plate in a jointed manner, and therefore in the case of helmet users with different head sizes can not have a precisely defined point of inclination and A defined pressure application of the earmuffs on the ear cannot be ensured. Since the jointed connection between the support bracket and the swivel plate is established only by the bistable leaf spring and relies on the two bistable end positions of this bistable leaf spring, the support bracket neither has an exactly defined extension. The out position also does not have a precisely defined retracted position, which prevents the ear defender from being adjusted to different head sizes.

Securing the ear protector in the rest position is achieved by means of the stop supported by the leaf spring abutting on the projection of the receptacle. However, this support relies on the friction of the leaf spring on the protrusion and may therefore change over time. The force in the direction towards the required actuating position on the swivel plate in order to move the stop out of the engaged position can therefore decrease over time, so that the user may still try to move the ear protector in the rest position. Pivoting inwards on the outside of the helmet causes the ear protectors to press against the helmet shell from the outside to prevent undesired downward rotation of the support bracket by means of the ear protectors.

Contents of the invention

The object of the present invention is to devise an ear protection device of the type mentioned at the outset so as to eliminate the above-mentioned problems, that is, in particular to eliminate the risk that the helmet may get caught in obstacles due to the ear protection device being attached to the helmet during use. objects, and the ear protectors can be accidentally swiveled from the resting position back into the protective position.

According to the invention, this object is achieved as follows: by means of a support bracket and a swivel plate connected to each other by an inclined joint, the tilting axis of which passes through the support bracket and the swivel plate; The yoke spring of the tilt joint between the free ends pre-stresses the support bracket to abut against further stops defining extended and retracted positions to thereby achieve a bi-directional stable tilt capability of the yoke spring and with a receiving portion designed for attachment on the inner side of the helmet.

According to the invention, the receiving portion is mounted on the inner side of the helmet such that the ear protectors and associated support brackets lie substantially within the perimeter of the protective helmet. The helmet therefore does not offer any possibility of obstacles such as tree branches etc getting stuck on the outside of the helmet. If the ear protectors are not required, the ear protectors can be rotated backwards into a resting position within the perimeter of the protective helmet, within the helmet.

Due to the attachment of the receiving portion of each ear protector on the inner side of the helmet, in particular on the inner side of the helmet shell, in addition to the support bracket and the ear protectors, external forces exerted by obstacles with which the helmet may come into contact are also prevented. Furthermore, since the receiving portion is mounted on the inner side of the helmet, the support bracket can pivot between a rest position and a parked position within the gap between the helmet shell and the inner fitting, i.e. the support bracket is always located on the helmet shell within the perimeter of the body. Accordingly, the support bracket and ear cups do not provide any catch or engagement points for obstacles in either position.

Due to the fact that, in each ear protector of the ear protection device according to the invention, the support bracket and the swivel plate are connected to each other by an oblique joint whose oblique axis passes through the support bracket and the swivel plate for Defects caused by bidirectionally stable leaf springs that support brackets are jointed to the swivel plate are eliminated. In the ear protection device according to the invention, the tilt axis forms a defined center of rotation which does not change over time. Furthermore, according to the invention, the yoke spring positioned adjacent to the inclined joint between the rotating plate and the free end of the supporting bracket and prestressing the supporting bracket only ensures the establishment of force between the supporting bracket and the rotating plate, That is, the yoke spring does not simultaneously define the extended and retracted positions of the support bracket. These positions are actually determined by defined stops. The yoke springs only provide the force for moving the support bracket towards these stops. Thus, the yoke spring, together with the other stops, establishes a defined end position for the support bracket when the support bracket is extended and retracted and thus ensures a bidirectionally stable inclination of the yoke spring between the defined stops. ability.

In the ear protection according to the invention, the yoke spring does not have the function of supporting the joint of the support bracket, but is only used to build up the force by means of which the support bracket can be held at the further stop. in a defined extended position and a defined retracted position. The problem of undesired downward rotation of the ear protectors from the rest position in the direction of the standby position is strongly mitigated, if not eliminated by the ear protector according to the invention, since the ear protectors will be located on the inner side of the helmet And on the outside of the inner fitting of the helmet in the rest position and will therefore have a significantly reduced tendency to rotate downwards from the rest position due to pressure from both sides.

Advantageous embodiments of the ear protection device according to the invention form the subject matter of the dependent claims.

In one embodiment of the ear protection device according to the invention, an eccentric bolt for adjusting the initial load applied to the support bracket by the yoke spring is rotatably arranged in the rotating plate and is in contact with the yoke spring. Thus, the magnitude of the force for pressing the ear protector against the ear in the retracted position of the support bracket can be adjusted in a simple manner.

In a further embodiment of the ear protection device according to the invention, a slider which is prestressed by a compression spring in the direction towards the swivel plate is displaceably supported at the free end of the support bracket, said slider Including a retaining protrusion capable of contacting the slider path on the receiving portion, and in the retracted position of the support bracket, the support bracket prevents displacement of the retaining protrusion, and in the extended position of the support bracket , the support bracket does not prevent the retaining protrusion from being displaced, and the slider releasably holds the support bracket in its rest position by means of engagement in a recess in the slider path of the receiving portion. The slider, which is preloaded by the spring, remains in engagement with the rotating disk in an embodiment of the invention in a position in which the free end of the support bracket engages in a recess of the slider. The recess of the slider thus forms one of the further stops defining the retracted position of the support bracket. On the other hand, the free end of the support bracket abuts against the rotating disk in a recess which thus constitutes one of the other stops and defines the extended position of the support bracket. In this extended position, the slider is displaceable on the support bracket against the force of the compression spring along the slider path on the receptacle in the direction opposite to the swivel plate, so that the support bracket including the swivel plate A support bracket that is pivotable in the receptacle and includes the ear protectors can be located in the rest position.

In a further embodiment of the ear protector according to the invention, a recess extending at least over a half circle for receiving the arc-shaped shoulder of the swivel plate is formed in the receiving portion. During the rotation of the rotary plate, the rotary plate is guided in the receptacle.

In a further embodiment of the ear protector according to the invention, elastic tongues protruding from the receptacle engage in complementary recesses in the swivel plate to lock the reciprocal engagement of the receptacle and the swivel plate and to release the button for the fixed state Arranged in a rotating plate. In this way the support bracket can be locked in place together with its swivel plate in the receptacle by snap fastening and released by operating a button.

Description of drawings

Embodiments of the invention will be described in more detail below with reference to the accompanying drawings, in which:

Figure 1 shows a protective helmet comprising an ear protection according to the invention, the helmet shell is shown in a sectional view and the two ear protectors constituting the ear protection are shown in the rest position, i.e. in a position pivoted away from the ear ;

FIG. 2 shows the protective helmet according to FIG. 1 , however in the operating position, ie in the retracted position on the ears, the ear protectors;

Figure 3 shows a side view of the protective helmet according to Figure 2;

FIG. 4 shows the protective helmet according to FIG. 3 , however the ear protection device according to the invention is pivoted into a parked position and accommodated in the helmet;

Figure 5 shows a view from below of the protective helmet according to Figure 4, showing only one ear protector on one side of the ear protection arrangement according to the invention;

Figure 6 shows a front view of one of the two ear protectors of the ear protection arrangement according to the invention;

Fig. 7 shows a front view of the ear defender according to Fig. 6;

FIG. 8 shows the ear defender according to FIGS. 6 and 7 in the standby position in a side view;

Figure 9 shows a rear view of the ear defender according to Figure 6;

Fig. 10 shows a longitudinal sectional view of the upper part of the ear protector according to Fig. 8;

Fig. 11A shows the upper part of the ear protector according to Fig. 7, pivoted into the rest position, together with the receiving part;

Fig. 11B shows a side view of the ear defender according to Fig. 11A;

Fig. 12A shows the ear protector according to Fig. 11A pivoted back into the inactive position;

Figure 12B shows a side view of the ear defender according to Figure 12A;

Fig. 13A shows the ear protector according to Fig. 12A but in the operating position;

Fig. 13B shows the ear defender according to Fig. 13A in side view; and

FIG. 14 shows the helmet shell of the protective helmet according to FIG. 5 as a detail in a schematic perspective view and in an oblique view from below, for the sake of clarity the internal fittings are not shown and are shown attached to the helmet shell There is only one ear protector receiver on the inside of the body.

Detailed ways

In different views in FIGS. 1 to 5 and 14 there is shown a protective helmet, generally designated 30 and comprising ear protection 33 according to the invention, especially designed for use in forestry. The ear protector 33 includes two ear protectors 34a, 34b. The protective helmet 30 includes a helmet shell 36 and an internal fitting subassembly generally indicated at 40 and including a support cage 42 , head strap 44 and neck strap 46 . The neck strap 46 is provided with a tensioning unit generally indicated at 48 .

The three support arms formed as spacers, of which only support arms 54 and 55 can be seen in FIGS. 1 and 2 , serve as means for the three-point attachment of the inner fitting or inner fitting subassembly 40 to the helmet shell 36 . The helmet shell 36 is dimensioned such that the inner width of the helmet shell is dimensioned so long and so wide and the support arms are sized and arranged such that, internally, the subassembly 40 and the helmet shell Between the bodies 36 there is a gap 60 for accommodating the ear cups 35 a , 35 b of the ear defenders 34 a or 34 b and other helmet accessories as well as mounting means for the ear defenders 33 . Other helmet accessories include the aforementioned tensioning unit 48 for the neck strap 46 . With respect to the ear protector 33, the gap 60 is determined such that, as can be seen in FIG. .

The mounting means for the ear protector 33 comprises two receptacles 80a, 80b attached to the inside of the helmet shell 36 . The receptacles 80a, 80b are pivotal supports for the support brackets 37a, 37b with the ear cups 35a or 35b as described in more detail further below. The receiving portions 80a, 80b are respectively integrally formed as pivotally supported support cups on the inner side of the helmet shell 36, or, preferably, are firmly mounted as another component.

The ear protection device 33 will now be described in more detail with reference to the drawings, in particular with reference to FIGS. 1 to 5 and 14 . FIG. 14 shows the helmet shell 36 without the inner fitting subassembly 40 in an oblique view from below, particularly illustrating the location of the receptacle 80a on the inside of the helmet shell 36 . The other receiving portion 80b, which cannot be seen, is reversely attached to the opposite side. 1 shows a protective helmet 30 with ear protectors 33 arranged on both sides, the helmet shell 36 is shown in a cross-sectional view, and in the extended state, that is, pivoted away from the ears in the standby position. The ear protectors 34a, 34b are shown in this state. FIG. 2 shows the protective helmet according to FIG. 1 , however, the ear protectors 34a, 34b are shown in the retracted state on the ears in the operating position. FIG. 3 shows a side view of the protective helmet according to FIG. 2 . FIG. 4 shows the protective helmet according to FIG. 3 , however, showing the ear protectors 34 a , 34 b when pivoted back into the rest position and accommodated in the helmet 30 .

The two ear protectors 34a, 34b comprise two ear protectors 35a, 35b pivotably supported in a forked support bracket 37a or 37b, respectively. The inside of the helmet shell 36 is provided with securely attached receptacles 80a, 80b. In the receiving portion 80a, 80b, the support bracket 37a is supported by means of a swivel plate 39a or 39b which, as can be seen in FIGS. , 37b are rotatably supported. The receiving portions 80a, 80b and the support brackets 37a, 37b are arranged and formed such that the support brackets 37a, 37b are able to pivot between two positions within the gap 60, ie the earflaps shown in FIGS. 2 and 3 The operative position in which the cups 35a, 35b are pivoted away from the ear and the resting position shown in FIG.

Each support bracket 37a, 37b is designed to be spring-preloaded and capable of bending in the region between the two ends of the support bracket 37a, 37b, where the support bracket 37a, 37b is in the gap 60 so that the ear protectors 35a, 35b pivot away from the ear in the unflexed position of each support bracket 37a, 37b respectively as shown in FIG. 1 and as shown in FIG. That pivots onto the ear in the bent position of the support brackets 37a, 37b, respectively. If the protective helmet 30 is not worn on the head, the two earmuffs 35a, 35b respectively reach a position positioned significantly further inward than the ear on which each earmuff 35a, 35b will abut. In other words, in this case the distance between the ear protectors is significantly smaller than the distance between the ears. In this way it is ensured that the ear protectors 35a, 35b remain pressed against the ear by spring preloading when the helmet 30 is worn. The spring preload for bending each support bracket 37a, 37b between two defined positions (two-way stable) is exerted by circularly curved yoke springs 92a, 92b (as can be seen e.g. in FIG. 7 arrived). Each support bracket 37a, 37b can be manually moved into a retracted position and into an extended position. In each of these positions, the end position locking is effected by the yoke spring 92a or 92b respectively cooperating with a stop described further below. If a helmet is worn and each ear cup 35a, 35b is to be held elastically against the ear, the end position locking of the support brackets 37a, 37b should not be reached.

In addition, each receiving portion 80a, 80b and each support bracket 37a, 37b including the rotating plate 39a, 39b are formed such that the support bracket can pivot rearward only from the position shown in FIG. 1 . In this way it is ensured that the ear protectors 35 a , 35 b can be accommodated in the gap 60 behind the ears without colliding with the ears and the lower edge of the helmet shell 36 . FIG. 6 shows a rear view of the ear protectors 34 a , 34 b of the ear protection device 33 . The ear protectors 34 a and 34 b are formed identically, ie, can be mounted on the right and left sides of the helmet 30 . The only difference is the design of the receptacles 80a, 80b, since they have slider paths 86a, 86b that descend more and more in the rearward direction. The receiving unit 80a is shown in FIG. 14 . The receiving portion 80a is also shown in FIGS. 11 to 13 .

According to the illustration in Fig. 7, the ear protectors 35a, 35b are pivotably supported on fork-like support brackets 37a, 37b. The swivel plates 39a, 39b are jointed to the support brackets 37a, 37b with angled joints 82a, 82b which can be seen in FIG. 8 . The tilt joints 82a, 82b are formed as tilt shafts 84a, 84b which are formed as rod-like shafts which are inserted in holes in the support brackets 37a, 37b and the swivel plates 39a, 39b, thus passing through the support brackets. rack and swivel plate. Due to the presence of the tilt joints 82a, 82b, the support brackets 37a, 37b can be tilted into the extended position (standby position) and retracted if the ear protector 34a, 34b is in the position of the ear protector 34a, 34b on the ear. back position (operating position). In the operating position shown in Fig. 13, the ear protectors 35a, 35b abut against the ear. Alternatively, the ear protectors 34a, 34b may occupy a standby position in which the ear protectors 34a, 34b protrude, ie in which the ear protectors are not pressed against the ear. This standby position is shown in FIG. 12 . In the operating position according to FIG. 13 , the ear defenders 34 a , 34 b can only be pivoted in a reduced angular range. In the rest position according to FIG. 12 , the ear defenders 34 a , 34 b can be pivoted into the rest position shown in FIG. 11 . For explanatory reasons, also shown in FIGS. 10 to 13 are the receptacles 80 a , 80 b which are generally firmly attached to the inner side of the helmet 30 , more precisely the inner side of the helmet shell 36 . The swivel plates 39 a , 39 b are rotatably supported in the receptacles 80 a , 80 b and can pivot between a rest position according to FIG. 12 and a rest position according to FIG. 11 . The operating position and the parking position are defined by stops which will be described in more detail below.

In the inactive position of the ear protectors 34a, 34b shown in FIG. 12, the free ends 38a, 38b of the support brackets 37a, 37b pivoted away from the ears are secured by the cover plate 51a rigidly connected to the swivel plate 39a, 39b. , 51b formed by the prestressing force of the yoke springs 92a, 92b remain on the stops 41a, 41b. The initial load of the yoke springs 92a, 92b keeps the support brackets 37a, 37b stable against the stops 41a, 41b. Contrary to the stops 41a, 41b, the receiving portions 80a, 80b have recesses in which the free ends 38a, 38b of the support brackets 37a, 37b can pivot from the inactive position shown in FIG. 12B into the operative position shown in FIG. 13B 89a, 89b. The wall of the receiving portion 80a, 80b facing the stop 41a, 41b forms another stop 43a, 43b, in the operating position shown in Fig. The free ends 38a, 38b are held against said further stop 43a, 43b. The support brackets 37a, 37b hinged to the swivel plates 39a, 39b prevent the support brackets 37a, 37b from rotating into the rest position shown in FIG. .

The pivotable and non-pivotable capabilities of the swivel plates 39a, 39b are determined by the sliders 98a, 98b shown in cross-sectional views in FIGS. 10-13. The sliders 98a, 98b are displaceably supported on extensions of the rotating plates 39a, 39b above the free ends 38a, 38b of the support brackets 37a, 37b and are moved along the direction of the rotating plates 39a, 39b by the compression springs 98a, 98b. 39b direction preload. The receiving portion 80a, 80b is provided at its lower edge with a slider path 86a, 86b. In FIGS. 10 to 13, only the receiving portion 80a mounted on the left inner side of the helmet is shown. Accordingly, the slider path is indicated only by 86a in these figures. The sliders 98a, 98b comprise retaining protrusions 88a, 88b which are able to come into contact with the slider paths 86a, 86b at the receptacles 80a, 80b and upon retraction of the support brackets 37a, 37b according to FIG. 13B In position, the support brackets 37a, 37b prevent the retaining protrusions 88a, 88b from being displaced, but in the extended position of the support brackets 37a, 37b according to FIGS. 11 and 12 do not prevent the retaining protrusions 88a, 88b from being displaced. The support brackets 37a, 37b placed in the extended position do not prevent the sliders 98a, 98b from being displaced, and by engaging in the recesses 87a, 87b in the slider paths 86a, 86b of the receptacles 80a, 80b, slide The blocks 98a, 98b releasably hold the support brackets 37a, 37b in their rest positions. The slides 98 a , 98 b are displaced by a rotational movement from the rest position according to FIG. 12 into the rest position according to FIG. 11 . The displaced slides 98a, 98b no longer allow pivoting of the support brackets 37a, 37b in the direction of the operating position, ie in the direction of the retracted position of the support brackets 37a, 37b. In the rest position according to FIG. 12 , the slides 98 a , 98 b are free and the support brackets 37 a , 37 b can thus be pivoted into the rest position according to FIG. 11 . In the operating position according to FIG. 13 , the slides 98 a , 98 b are immobile, so that the support brackets 37 a , 37 b including the ear defenders 35 a , 35 b cannot be pivoted into the rest position. Only when the support brackets 37a, 37b are pivoted back from the operating position according to FIG. 13 to the stand-by position according to FIG. This pivoting capability is only regenerated when in the neutral position.

In the receptacles 80a, 80b are formed grooves 85a, 85b which extend at least over half a circle and which, as can be seen in FIG. , 49b. In FIG. 10 , as can further be seen, the receiving portions 80a, 80b comprise elastic tongues 81a, 81b protruding towards the rotating plates 39a, 39b. The resilient tongues 81a, 81b engage in complementary recesses 83a, 83b in the swivel plates 39a, 39b to lock the mutual engagement of the receptacles 80a, 80b and the swivel plates 39a, 39b. In the rotating plates 39a, 39b, buttons 50a, 50b for releasing the restrained state are provided. When the buttons 50a, 50b in FIG. 9 are operated, the elastic tongues 81a, 81b in FIG. 10 are pushed to the right, whereby the snap-fastening between the receptacles 80a, 80b and the swivel plates 39a, 39b is released again .

Each earmuff 35a, 35b is curved concavely in the longitudinal direction on its side facing the ear, so that the earmuff can be more easily adapted to the shape of the ear and the head. This results in an improved pressure distribution on the ear and enables better resistance to the ingress of noise in combination with reduced pressure application.

List of reference signs

30 protective helmets

33 Ear protectors

34a, 34b ear defenders

35a, 35b earmuffs

36 helmet shell

37a, 37b support brackets

38a, 38b free ends

39a, 39b rotating plate

40 internal fit subassemblies

41a, 41b stop (standby position, support bracket)

42 support cage

43a, 43b Additional stops (operating position, support bracket)

44 headband

46 neck strap

48 tensioning unit

49a, 49b arc-shaped shoulders

50a, 50b buttons

51a, 51b cover plate

54 support arm

55 support arm

60 gap

80a, 80b receiving unit

81a, 81b elastic tongue

82a, 82b inclined joint

83a, 83b complementary depressions

84a, 84b inclined axis

85a, 85b groove

86a, 86b slider path

87a, 87b concave part

88a, 88b hold protrusions

89a, 89b concave part

92a, 92b yoke spring

94a eccentric bolt

96a, 96b pressure spring

98a, 98b slider

Claims (5)

CLAIMS 1. An ear protection arrangement to be fastened to a protective helmet (30), comprising two ear defenders (34a, 34b), each said ear defender comprising: - forked support brackets (37a, 37b) on which the ear protectors (35a, 35b) are pivotably supported, - a swivel plate (39a, 39b), said swivel plate (39a, 39b) being connected in a jointed manner to said support bracket (37a, 37b), said support bracket (37a, 37b) being able to the rotating plate is bidirectionally stably tilted into an extended position and a retracted position, and - a receiving portion (80a, 80b) attachable or attached to a helmet (30), said rotating plate (39a, 39b) being rotatably supported on said in a receiving portion, and said receiving portion is pivotable between a protective position defined by a stop and a rest position, It is characterized in that said supporting brackets (37a, 37b) and said rotating plates (39a, 39b) are connected to each other by inclined joints (82a, 82b), the inclined axes (84a, 84b) of said inclined joints passing through the said support brackets (37a, 37b) and said rotating plates (39a, 39b), Yoke springs disposed adjacent to said tilt joints (82a, 82b) between said swivel plates (39a, 39b) and free ends (38a, 38b) of said support brackets (37a, 37b) the support bracket is prestressed to abut against a further stop defining said extended position and said retracted position and in this way ensures a bidirectionally stable tilting capability of said support bracket, and The receivers (80a, 80b) are designed to be attached to the inside of the helmet (30). 2. The ear protection device according to claim 1, characterized in that it comprises an eccentric bolt (94a, 94b) which is rotatably arranged in the rotating plate (39a, 39b) and connected with the yoke The springs (92a, 92b) contact to adjust the initial load applied to the support brackets (37a, 37b) by the yoke springs (92a, 92b). 3. The ear protection device according to claim 1 or 2, characterized in that at the free end (38a, 38b) of the support bracket (37a, 37b), along the Sliders (98a, 98b) prestressed in the direction towards said rotary plates (39a, 39b) are displaceably supported on extensions of said rotary plates (39a, 39b), said sliders comprising retaining protrusions capable of contacting the slider path on the receptacle (80a, 80b) and in the retracted position of the support bracket (37a, 37b) preventing The retaining protrusions are displaced while in the extended position of the supporting brackets, the supporting brackets (37a, 37b) do not prevent the retaining protrusions from being displaced, and the slider passes through the receiving portion Engagement in a recess (87a, 87b) in the slider path of (80a, 80b) releasably retains the support bracket (37a, 37b) in the parked position. 4. The ear protection device according to claim 1 or 2, characterized by comprising a groove formed in the receiving portion (80a, 80b) and extending at least over a half circle to receive the rotating plate ( 39a, 39b) rounded shoulders (49a, 49b). 5. Ear protection device according to claim 4, characterized in that it comprises elastic tongues (81a, 81b) protruding from the receiving part (80a, 80b) to engage in the rotating plate (39a, 39b ) in complementary recesses (83a, 83b) to lock the mutual engagement of the receiving portion (80a, 80b) and the rotating plate (39a, 39b), and by means of ) The buttons (50a, 50b) in ) release the hold.