EP2617307B1 - Protective helmet - Google Patents

Description

The present invention relates to a protective helmet having a helmet body provided to be worn on and protect a human head, comprising a respirator mask having a mask body, and first and second mask holding brackets attached to opposite sides of the mask body, and first and second mask holding devices mounted on opposite sides of the helmet body. Here, the first mask holding device is provided to be connected to the first mask holding bracket, and the second mask holding device is provided to be connected to the second mask holding strap. At least one of the first and second mask holding devices has a holding device engaging portion, and at least one of the first and second mask holding handles has a holding strap engaging portion. The retainer engaging portion and the retainer bar engaging portion are formed to engage with each other when the retainer engaging portion is moved in an engaging direction with respect to the retainer engaging portion. In this case, the holding device engagement portion has a base plate, a perpendicular to the base plate extending U-shaped stop wall having a bottom portion, two opposite leg portions and an engagement direction facing opening, and a cover plate which is parallel and spaced from the base plate at least partially between the leg portions of U-shaped stop wall extends.

Protective helmets according to the present invention with a helmet body and a respirator are used, for example, by firefighters as part of their protective equipment for protection against burns, smoke poisoning and falling parts used in firefighting operations. However, a use outside the fire department, for example, rescue services or technical support services, conceivable.

In all these uses, it is desirable that the respirator can be attached as easily and quickly to the helmet body or removed from it. At the same time, the respirator should be tight and secure against different users' face shapes and held against the helmet. For this purpose, the respiratory mask on opposite sides on the mask body flexibly mounted mask holding bracket, which can be detachably connected to mounted on opposite sides of the helmet body mask holding devices.

In order to ensure a secure and firm hold of the respirator on the user's face with different face shapes of a user, the mask retainers have an elastic member that can be biased to connect the mask retainers to the mask retainers on the helmet body. In this way, the biasing force of the elastic members of the first and second mask holding yokes presses the mask body against the user's face and thus ensures a firm hold of the mask.

However, it is also conceivable that the respirator with one of the mask support bracket is fixedly attached to one of the mask holding devices of the protective helmet and the other mask holder bracket can be releasably connected to the other mask holder of the protective helmet. In this way, the mask would be permanently attached to the hard hat and could be secured by attaching the mask holder to the mask holder on one side of the helmet are applied to the user's face and held there.

Each mask holding bracket, which can be detachably attached to a mask holding device of the protective helmet, has a headband engaging portion, and each mask holding device, to which a mask holding bracket can be detachably attached, has a holding device engaging portion. Retainer-engaging portion and retainer-engaging portion are formed so that they can engage with each other and thus form a detachable connection between the mask holding bracket and the mask holding device. For this purpose, the retaining clip engagement section and the retaining device engagement section can be formed in different ways.

From the prior art, such as the DE 10 2005 024 508 B3 , a combination of headband engaging portion and jig engaging portion is known, wherein the jig engaging portion includes a base plate, a cover plate parallel to the base plate, and a U-shaped stopper wall having a bottom portion and two opposite leg portions that curves uniformly in a plane parallel to the base plate so that leg portions and floor section continuously merge into each other. In this case, the Haltebügeleingriffsabschnitt a protrusion with rounded contour, which is formed such that it can be inserted between the base plate and cover plate and between the leg portions of the U-shaped stop wall and rests with the entire rounded contour of the curved stop wall.

Alternatively, from the prior art, such as the US 4,734,940 , but also combinations of holding device engaging portion and headband engaging portion, wherein the U-shaped abutment wall of the retainer engagement portion is formed by two substantially parallel leg portions and a perpendicular to the leg portions and connecting the bottom portion. In this case, the projection of the headband engaging portion has a substantially rectangular contour so that it can be inserted between the parallel leg portions of the U-shaped abutment wall of the holder engaging portion until abutment with the bottom portion, so that the rectangular projection over the entire inside of the bottom portion attached to this.

Thus, in the prior art, there are some protective helmets having a retainer engaging portion with a curved U-shaped stop wall, and some respirators having a mask retainer with a retainer engaging portion having a rounded protrusion. On the other hand, in the prior art, there are protective helmets having a jig engaging portion whose U-shaped stopper wall has a rectangular shape, that is, two substantially parallel leg portions and a bottom portion perpendicular to the leg portions, resp. Respirators having a mask holding bracket with a headband engaging portion has a substantially rectangular shaped projection.

The combination of a respirator with Haltebügeleingriffsabschnitt with rounded projection and a helmet body with holding device engagement portion with rectangular stop wall as well as a combination of a respirator with Haltebügeleingriffsabschnitt with rectangular projection and a helmet body with holding device engagement portion with curved stop wall is not possible or not useful, since no complete engagement between the headband engaging portion and holding device engagement portion, that is - due to the different shape - no complete concern of the projection on the stop wall takes place. The retainer engaging portion and the retainer engaging portion are easy to disengage, whereby the respirator can detach from the user's protective helmet and face.

However, for economic reasons, among others, it is desirable that respirators having differently formed retainer engaging portions may alternatively be attached to the retainer engaging portion of a protective helmet. This applies, for example, in the event that a protective helmet must be replaced. In this case, it makes sense if the corresponding respirator can also be attached to another helmet.

Starting from the prior art, it is therefore an object of the present invention to provide a protective helmet with a holding device engaging portion which can be connected both with a rounded and with a rectangular formed headband engaging portion of the retaining clip of a respirator in a safe and simple manner.

This object is achieved in that the mutually facing inner surfaces of the leg portions initially have a curved course, wherein the distance of the mutually facing inner surfaces of the leg portions decreases towards each other in the direction of the bottom portion, and following the curved course towards the bottom portion have a straight course parallel to the direction of engagement, and that the opening facing inner surface of the bottom portion in the direction from the first leg portion to the second leg portion has a straight course perpendicular to the direction of engagement.

In this way, the molds on the one hand of a retainer engaging portion having a curved U-shaped stopper wall and on the other hand a retainer engagement portion having a rectangular U-shaped stopper wall having two substantially parallel leg portions and a bottom portion perpendicular to the leg portions are commonly realized in a retainer engaging portion.

In this case, a rounded projection of a Haltebügeleingriffsabschnitts on the curved part of the inner surfaces of the leg portions and preferably simultaneously abut at a point of the straight inner surface of the bottom portion, whereby a secure and tight fit of the headband engagement portion is achieved in the holding device engagement portion according to the invention. On the other hand, however, a rectangular projection of a Haltebügeleingriffsabschnitts over the entire inner surface of the bottom portion and the straight engaging extending parts of the leg portions abut against the stop wall, whereby a firm and secure fit and the Haltebügeleingriffsabschnitts with rectangular projection can be achieved in the holding device engagement portion according to the invention.

To avoid friction and for easy engagement and disengagement, the transition between the part of the inner surfaces of the leg sections, the curved course and that part of the inner surfaces of the leg portions which has a straight course, be rounded. In addition, the distance between the straight inner surfaces of the leg portions in the engagement direction, that is, toward the bottom portion, minimally decrease, thereby also facilitating the engagement and disengagement of the headband engagement portion with the retainer engagement portion. This decrease in the distance between the straight inner surfaces of the leg sections in the direction of the bottom section is so small that this does not contradict the principle of the straight inner surfaces of the leg sections which are basically parallel to the engagement direction, the angle enclosed by the inner surfaces of the leg sections being 5 °, preferably 3 °, more preferably 1 °.

Both forms of Haltebügeleingriffsabschnitten are thus held in the plane parallel to the base plate in the direction of engagement and perpendicular to the direction of engagement by the stop wall, so that a movement only against the direction of engagement is possible.

In a preferred embodiment, the curved facing inner surfaces of the leg portions are curved such that they extend - for the most part - on a circular path, which touches the inner surface of the bottom portion at a point. In this way, a headband engaging portion, the projection of which has a contour corresponding to a circular path, not only abut against the curved parts of the inner surfaces of the leg portions, but also abut at a point on the inner surface of the bottom portion, whereby an even safer and firmer fit of the projection of the headband engaging portion in the jig engaging portion.

In a further preferred embodiment, the holding device engagement portion has a latching projection formed on the base plate, facing in the direction of engagement, and elastically deformable in the direction perpendicular to the base plate. Such a locking projection serves to prevent slipping out of the headband engaging portion from the jig engaging portion.

In this case, the projection of the headband engaging portion may have a lip extending in the direction perpendicular to the base plate and, when the headband engaging portion and the jig engaging portion are engaged, between the stopper wall and the locking projection. In this way, the locking projection holds the projection of the headband engaging portion in position in abutment with the abutment wall. The lip of the protrusion may be moved to disengage the support bracket engaging portion and the retainer engaging portion only beyond the locking protrusion opposite to the engagement direction when the locking protrusion is deformed toward perpendicular to the base plate and away from the protrusion, so that the lip is no longer caught by the locking protrusion when the projection is moved counter to the engagement direction.

The latching projection is connected by a tapered, neck-like region with the base plate and extending therefrom in the direction of engagement, that is towards the bottom portion. In addition, a breakthrough may be provided in the neck-like area. By such a construction is the locking projection in the direction perpendicular to the base plate easily deformed.

The deformation of the locking projection for releasing the lip of the projection of the headband engaging portion may be done by a push pin attached to the headband engaging portion over which the locking projection is disposed when the retaining bracket engaging portion and the retaining device engaging portion are engaged and, for example, by pressing with a user's thumb. perpendicular to the base plate can be moved to the surface of the locking projection, whereby the locking projection is deformed in the direction perpendicular to the base plate and away from the headband engaging portion.

It is particularly preferred if the latching projection extends flat in the plane of the base plate or parallel to this and in its extension plane has a part-circular contour which runs evenly spaced to the circular path on which extend the curved facing each other inner surfaces of the leg portions. In this way, the contour of the locking projection follows the shape of the curved inner surfaces of the leg portions, wherein between the inner surfaces of the leg portions and the edge of the locking projection, a uniform gap is formed in which engages the lip of the projection of the Haltebügeleingriffsabschnitts form-fitting, so that no play the lip between Locking projection and inner sides of the leg sections is allowed.

In a preferred embodiment, in the direction of the opening of the stop wall, ie counter to the direction of engagement, the cover plate has a recess which is rectangular in the plane of the cover plate and whose dimension in this plane is perpendicular to the direction of engagement of the dimension of the bottom portion in this direction corresponds. Minor deviations from the rectangular shape to a trapezoidal shape are also possible according to the invention. The recess serves to facilitate engagement or disengagement of the retainer engagement recess with the retainer portion. Hanging the projection of the headband engagement portion on the cover plate is thus largely avoided. The extending around the recess cover plate is sufficient to remove the projection of the headband engagement portion in the direction perpendicular to the base plate can not from this. A rectangular recess is particularly advantageous because the engagement of both rectangular and rounded projections of headband engagement portions with the retainer engagement portion is facilitated.

In a further preferred embodiment, at least one mask holding device has a mounting plate attached to the helmet body, the mounting plate having a guide rail with which the retainer engagement portion engages such that the retainer engagement portion is slidably mounted on the mounting plate parallel to the engagement direction.

The holder engaging portion may be linearly moved in the form of a carriage on the planar guide rail projecting away from the mounting plate. In this case, the guide rail may further comprise two opposite and facing away from each other projections and the holding device engaging portion having two mutually facing recesses, wherein the recesses of the holding device engagement portion engage with the projections of the guide rail and thus a guided displacement along the guide rail becomes possible. The retainer engaging portion may also be adjusted stepwise or continuously along the mounting plate and thus on a fixed path on the helmet. In this way, the position of the respirator against the helmet and thus also against the face of a user can be adjusted or the contact pressure of the mask can be adjusted to the face.

It is particularly preferred if a threaded pin is provided, which is rotatably mounted about its longitudinal axis parallel to the engagement direction and immovably in the direction of the longitudinal axis of the mounting plate, and if the thread of the threaded pin with the mating thread of a mating threaded element of the holding device engagement portion engages such that a Rotation of the threaded pin causes a linear movement of the holding device engaging portion along the guide rail. In this way, by means of a rotary movement of the threaded pin, a continuous adjustment of the holding device engagement section in a linear direction along the guide rail can take place.

It is also particularly preferred if the threaded pin has in the direction of the longitudinal axis on one side a Verstellende with a simple slot, a Phillips head or a screw head, which is adapted to engage with a wrench or screwdriver. The grub screw can therefore be formed as a grub screw, wherein the rotation of the threaded pin can be caused by means of a corresponding Einfachschlitz- or Phillips screwdriver at Verstellende and thus the holding device engagement portion relative to the guide rail can be adjusted, whereby the contact pressure of the mask is adjusted to the face of a user. The grub screw can also as Screw may be formed with a screw head, which also has one or more slots, an edged circumference, a Imbusbohrung or other means for engagement with a wrench or screwdriver to rotate the threaded pin and thus to adjust the holding device engagement portion relative to the guide rail.

In another likewise particularly preferred embodiment, the threaded pin in the direction of the longitudinal axis on one side a thumb screw head. With the help of a thumbscrew head, the grub screw can be turned by hand without the use of tools and thus the holding device engaging portion or the position of the respirator can be adjusted. It is further particularly preferred if the Flügelschraubenkopf is elastically displaceable in the direction of the longitudinal axis mounted on the threaded pin, wherein the Flügelschraubenkopf parallel to the longitudinal axis of the threaded pin projecting a locking lug and wherein the mounting plate or the guide rail has a latching recess which is formed to intervene with the latch.

It can therefore be a spring element, for example a helical spring, be provided between the thumbscrew head and the threaded pin, so that the thumbscrew head must first be pulled away in the direction of the longitudinal axis of the threaded pin of the threaded pin to bring the locking lug out of engagement with the locking recess and to be able to turn the thumbscrew head with the grub screw rotatably connected thereto. If the locking lug is now rotated in alignment with the latching recess, the spring force presses the latching lug back into the latching recess and thus prevents unintentional rotation of the thumbscrew head or of the threaded pin attached thereto. In addition, in this way, the thumbscrew head can be rotated by a fixed predetermined angular position and the holding device engaging portion relative to the guide rail thus adjusted according to a precisely predetermined shift stage. The more locking recesses are provided, the smaller shift stages can be adjusted.

In a preferred embodiment, the guide rail has a scale, and the holder engaging portion has a pointing means, which is formed so as to indicate on the scale a shift state of the holder engaging portion with respect to the mounting plate. The distances of such a scale can preferably be adapted to the determined by the distances of the locking recesses shift stages of the holding device engagement portion relative to the guide rail, so that for example the linear displacement of the holding device engagement portion relative to the guide rail, which - in the case of only one locking recess - a revolution of the thumb screw head or Grub screw corresponds to exactly one shift step on the scale.

In this case, it is particularly preferred if a breakthrough is provided in the holding device engagement section as a pointer means, by means of which a scale section characterizing the instantaneous shift position is visible on the guide rail located therebelow. However, it is also conceivable to provide, for example, an arrow, a dash or a dot on the holding device engagement section, which can always be brought into alignment with exactly one position on the scale.

Fig. 1

eine perspektivische Darstellung eines Haltevorrichtungseingriffsabschnitt nach dem Stand der Technik mit einer gekrümmten Innenfläche der Anschlagwand,

Fig. 2

eine perspektivische Darstellung eines Haltevorrichtungseingriffsabschnitt nach dem Stand der Technik mit einer eckigen Anschlagwand, wobei die Innenflächen der Schenkelabschnitte parallel zueinander verlaufen und die Innenfläche des Bodenabschnitts senkrecht zu den Innenflächen der Schenkelabschnitte verläuft,

Fig. 3

ein Ausführungsbeispiel eines Haltevorrichtungseingriffsabschnitts der Maskenhaltevorrichtung eines erfindungsgemäßen Schutzhelms,

Fig. 4

einen Schnitt parallel zur Basisplatte durch den Haltevorrichtungseingriffsabschnitt aus Fig. 3,

Fig. 5

einen Schnitt senkrecht zur Basisplatte und parallel zur Eingriffsrichtung durch den Haltevorrichtungseingriffsabschnitt aus Fig. 3 in Eingriff mit einem Haltebügeleingriffsabschnitt mit abgerundetem Vorsprung und einer Lippe, die mit dem Rastvorsprung eingreift,

Fig. 6

einen Schnitt senkrecht zur Basisplatte und parallel zur Eingriffsrichtung durch den Haltevorrichtungseingriffsabschnitt aus Fig. 3 in Eingriff mit einem Haltebügeleingriffsabschnitt mit rechteckigem Vorsprung,

Fig. 7

eine Draufsicht auf die Maskenhaltevorrichtung eines weiteren Ausführungsbeispiels eines erfindungsgemäßen Schutzhelms mit einer Befestigungsplatte mit einer Führungsschiene und mit einem Haltevorrichtungseingriffsabschnitt,

Fig. 8

einen Schnitt entlang der Längsachse des Gewindestifts und senkrecht zur Basisplatte durch die Maskenhaltevorrichtung des Ausführungsbeispiels aus Fig. 7 und

Fig. 9

eine Rückseitenansicht der Maskenhaltevorrichtung des Ausführungsbeispiels aus Fig. 7 mit Blick auf den Flügelschraubenkopf des Gewindestifts.

The present invention will be explained below with reference to an exemplary embodiment of a drawing. The drawing shows in

Fig. 1

a perspective view of a holding device engaging portion of the prior art with a curved inner surface of the stop wall,

Fig. 2

a perspective view of a holding device engaging portion of the prior art with an angular stop wall, wherein the inner surfaces of the leg portions parallel to each other and the inner surface of the bottom portion is perpendicular to the inner surfaces of the leg portions,

Fig. 3

an embodiment of a holding device engaging portion of the mask holding device of a protective helmet according to the invention,

Fig. 4

a section parallel to the base plate by the holding device engagement portion Fig. 3 .

Fig. 5

a section perpendicular to the base plate and parallel to the direction of engagement by the holding device engaging portion Fig. 3 in engagement with a headband engaging portion with a rounded projection and a lip which engages with the locking projection,

Fig. 6

a section perpendicular to the base plate and parallel to the direction of engagement by the holding device engaging portion Fig. 3 in engagement with a headband engaging portion with a rectangular projection,

Fig. 7

a top view of the mask holding device of another embodiment of a protective helmet according to the invention with a mounting plate with a guide rail and with a holding device engagement portion,

Fig. 8

a section along the longitudinal axis of the threaded pin and perpendicular to the base plate through the mask holding device of the embodiment Fig. 7 and

Fig. 9

a rear view of the mask holding device of the embodiment Fig. 7 looking at the thumbscrew head of the grub screw.

In Fig. 1 The retainer engaging portion 1 "comprises a base plate 3, a cover plate 5 extending parallel and spaced from the base plate 3, and a U-shaped stop wall connected to the base plate 3 perpendicular thereto 7 with two opposite leg portions 9a, 9b and a bottom portion 11 which connects the two leg portions 9a, 9b. The inner surfaces of the leg portions 9a, 9b and the inner surface of the bottom portion 11 merge into each other in the form of a continuous arc having a continuous curvature. That is, the entire inner surface of the U-shaped abutment wall has a curvature. In addition, the base plate 3 has a latching projection 17, which faces the bottom portion 11 of the stop wall 7.

Fig. 2 shows another holding device engagement portion 1 "'of a protective helmet according to the prior art, which also like the holding device engagement portion 1" from Fig. 1 a base plate 3, a parallel spaced therefrom cover plate 5 and a perpendicular to the base plate 3 extending U-shaped stop wall 7 has. Unlike the holding device engaging portion 1 "out Fig. 1 has the U-shaped stopper wall 7 of the holder engaging portion 1 "' Fig. 2 However, two opposite leg portions 9a, 9b, whose inner surfaces are substantially parallel to each other, and a bottom portion 11, whose inner surface is substantially perpendicular to the inner surfaces of the leg portions 9a, 9b. Since the holding device engaging portions 1 ", 1"'after Fig. 1 and 2 are constructed similar, similar features are identified by the same reference numerals.

The holding device engaging portion 1 "out Fig. 1 is thus formed so as to engage with a headband engaging portion 21 (in FIG Fig. 5 shown) having a rounded projection 23 (FIG. Fig. 5 ), which is provided for engagement with the stop wall 7, has. On the other hand, the holder engaging portion 1 "'is off Fig. 2 formed so as to engage with a headband engaging portion 25 (in FIG Fig. 6 shown), which has an angular projection 27 (FIG. Fig. 6 ) to rest against the stop wall 7. In order to be able to engage both with a headband engaging portion 21 with a round projection 23 and with a Haltebügeleingriffsabschnitt 25 with angular projection 27 while ensuring a secure and firm grip, according to the invention a protective helmet with a holding device engagement portion 1, 1 'is provided as this in Fig. 3 to 9 is shown. Again, similar features are identified by like reference numerals.

Fig. 3 shows a holding device engaging portion 1 of an embodiment of a protective helmet according to the invention. Protective helmets of this type include a helmet body intended to be worn on and protect a human head, a respirator with a mask body and first and second mask support brackets attached to opposite sides of the mask body, and first and second second mask holding device mounted on opposite sides of the helmet body and provided to be connected to the first and second mask holding brackets. For this purpose, at least one mask holding bracket 29 (in FIGS. 5 and 6 shown) a Haltebügeleingriffsabschnitt 21 and 25 ( FIGS. 5 and 6 ), and at least one mask holding device has a holding device engaging portion 1. Retaining bar engaging portions 21 and 25 and retainer engaging portion 1 are formed so as to engage with each other by a relative movement with respect to each other or by a movement of the Haltebügeleingriffsabschnitts 21 and 25 in an engagement direction 31 relative to the holding device engaging portion 1 and thus a releasable connection of the mask holding device with the mask holding bracket 29th to build.

The holding device engaging portion 1, as in FIG Fig. 3 shown, a base plate 3, a perpendicular to the base plate 3 extending and connected thereto U-shaped stop wall 7 with a bottom portion 11, two opposite leg portions 9a, 9b and an opening 33 which is opposite to the bottom portion 11 and against the engagement direction 31st has. The base plate extends in parallel, and the bottom portion 11 extends perpendicular to the engagement direction 31. Further, the holding device engagement portion 1 has a cover plate 5 parallel to the base plate 3 extending at a distance from the base plate 3 between the leg portions 9a, 9b and the bottom portion 11. In this way, between the base plate 3, the cover plate 5 and the U-shaped stop wall 7 comprising the two leg portions 9a, 9b and the bottom portion 11 is formed a cavity into which the projection 23 and 27 of a Haltebügeleingriffsabschnitts 25 and 29 is introduced when the headband engaging portion 25 or 29 engages with the jig engaging portion 1.

How out Fig. 4 is clear, the mutually facing inner surfaces 13a, 13b of the leg portions 9a, 9b viewed in the engagement direction 31 initially has a curved course, wherein the distance between the facing inner surfaces 13a, 13b of the leg portions 9a, 9b in the direction of engagement 31, that is to the bottom portion 11th down, decreases. In this case, the amount by which the distance decreases in the direction of engagement 31 increases. Following the curved course, the inner surfaces 13a, 13b of the leg portions 9a, 9b in the engagement direction 31 up to the bottom portion 11 a straight course, wherein the distance between the inner surfaces 13a, 13b of the leg portions 9a, 9b remains constant in this area and the inner surfaces 13a, 13b extend parallel to the engagement direction 31. The inner surface 15 of the bottom portion 11 has a straight course perpendicular to the engagement direction 31 parallel to the base plate 3. The curved portions of the facing inner surfaces 13a, 13b of the leg portions 9a, 9b are preferably curved so as to substantially extend on a common circular path that contacts the inner surface 15 of the bottom portion 11 at one point.

In order to achieve a smooth engagement of the headband engaging portion 21, and 25 with the holding device engagement portion 1 is - as out FIG. 4 can be seen - on the one hand, the transition between curved course and straight course of the inner surfaces 13a, 13b of the leg portions 9a, 9b rounded and on the other hand, a minimal decrease of the distance of the inner surfaces 13a, 13b of the leg portions 9a, 9b of each other in the region of the straight course in Direction to the bottom portion 11 provided. A minimal decrease in the spacing of the inner surfaces 13a, 13b of the leg sections 9a, 9b relative to one another in the engagement direction 31 is thus expressly permitted according to the invention and should not contradict a part of the inner surfaces 13a, 13b of the leg sections 9a, 9b running essentially parallel to the engagement direction 31 stand.

In addition, the holding device engagement portion 1 has a latching projection 17 which points in the direction of engagement 31 in the plane of the base plate 3 starting from the base plate 3. At the location where the locking projection 17 is connected to the base plate 3, the locking projection 17 has a taper 35 and an opening 37, whereby a deformation or bending of the latching projection 17 relative to the base plate 3 is facilitated. The latching projection 17 further has, in the plane of the base plate 3, a rounded, preferably circular contour 39 which is uniformly spaced from the curved areas of the inner surfaces 13a, 13b of the leg sections 9a, 9b.

As in Fig. 3 can be seen, the cover plate 5 against the engagement direction 31, that is, in the direction of the opening 33 of the stop wall 7 out, a recess 41 which has a rectangular in the plane of the cover plate 5 or trapezoidal shape having. In other words, the cover plate 5 in a plane parallel to the base plate 3 has a U-shaped course, wherein the opening of the U-shape opposite to the engagement direction 31 points.

In FIGS. 5 and 6 are a headband engaging portion 21 with a rounded projection 23 (FIG. Fig. 5 ) and a headband engaging portion 25 having an angular projection 27 (FIG. Fig. 6 ).

The present embodiment of the protective helmet according to the invention can be used as follows. In order to fix the respirator to the helmet body while pressing against a user's face, the retainer engaging portion 21 and 25, respectively, of the mask retainer 29 of the respirator is engaged with the retainer engagement portion 1 of the mask retainer attached to the helmet body. It is - depending on how the projection 23 and 27 of the headband engaging portion 21 and 25 is formed - either a round projection 23 (see Fig. 5 ) or an angular, preferably rectangular, projection 27 (see Fig. 6 ) introduced into the cavity between the base plate 3, cover plate 5 and U-shaped stop wall 7.

In the case of a rounded projection 23 (FIG. Fig. 5 ), the projection 23 abuts the curved portions of the inner surfaces 13a, 13b of the leg portions 9a, 9b, and more preferably at a point on the inner surface 15 of the bottom portion 11. The projection 23 may in this case further comprise a lip 43 which extends perpendicular to the plane in which the projection 23 extends. The lip 43 is in the engaged state of the support bracket engagement portion 21 and the retainer engagement portion 1 between the latching projection 17 and the stopper wall 7 are arranged so that the stopper projection 17 prevents movement of the projection 23 against the engagement direction 31. In order for the headband engaging portion 21 to be disengaged from the jig engaging portion 1, the locking projection 17 must be elastically deformed, that is, bent, in the direction perpendicular to the base plate 3 and away from the protrusion 23. This can be done by a arranged on the mask support bracket 29 and, for example, by a user with his finger movable pressure pin which presses on the surface of the locking projection 17 and this deformed perpendicular to the base plate 3.

In the case of an angularly shaped projection 27 (FIG. Fig. 6 ) is preferably the projection 27 over the entire length of the inner side 15 of the bottom portion 11 of this and at least partially to the straight portions of the inner sides 13a, 13b of the leg portions 9a, 9b.

Both in the case of a Haltebügeleingriffsabschnittes 21 with a round projection 23 and in the case of a Haltebügeleingriffsabschnittes 25 with rectangular projection 27 in this way the Haltevorrichtungseingriffsabschnitt 1 according to the invention a secure and firm connection of the mask holding bracket 29 with the mask holding device and thus a secure and firm hold of the respirator reached the helmet body and the face of a user.

In Fig. 7 to 9 the mask holding device 45 of another embodiment of a protective helmet according to the invention is shown with a helmet body, a respirator and a mask holder 45, wherein also in this embodiment, similar features are identified by like reference numerals.

The mask holding device 45 has - as in Fig. 7 shown - a mounting plate 47 with a guide rail 49 and a holding device engagement portion 1 'on. The mounting plate 47 can be attached to the helmet body of a protective helmet. The guide rail 49 is formed protruding from the mounting plate 47 and has at two parallel edges facing away from each other projections 51 a, 51 b. The holding device engaging portion 1 'has on its side facing away from the cover plate 5 side two parallel mutually facing recesses 53 a, 53 b, which are formed so as to engage with the projections 51 a, 51 b of the guide rail 49. In this way, the holder engaging portion 1 'is slidably attached to the mounting plate 47 along the guide rail 49 in parallel with the projections 51a, 51b of the guide rail 49. In the present embodiment, the holding device engaging portion 1 'in the engagement direction 31 along the guide rail 49 is slidable. However, it is also conceivable that the parallel recesses 53a, 53b of the holding device engagement portion 1 'are arranged rotated by an angle to the engagement direction.

On the side facing away from the guide rail 49 side has the holding device engaging portion 1 'similar to the first embodiment described a base plate 3 with a locking projection 17, a cover plate 5 spaced parallel to the base plate 3 with a recess 41 and a U-shaped stop wall 7 with two opposite leg portions 9a, 9b and a bottom portion 11. The inner surfaces 13a, 13b of the stop wall 9a, 9b are, as described in connection with the first embodiment, in Engagement direction 31 initially curved and then formed straight substantially parallel to the engagement direction 31.

Further, the mask holding device 45 has a threaded pin 55 which is rotatably supported about its longitudinal axis 57 and parallel to the projections 51a, 51b of the guide rail 49 and at the same time immovably in the direction of the projections 51a, 51b of the guide rail 49 on the mounting plate 47. In this case, the thread 59 of the threaded pin 55 engages with the mating thread 61 of a mating thread element 63 provided on the holding device engagement section 1 ', whereby a linear movement of the holding device engagement section 1' takes place along the guide rail 49 during a rotary movement of the threaded pin 55. By a rotation of the threaded pin 55 so the linear position of the holding device engagement portion 1 'relative to the guide rail 49 can be adjusted.

The rotation of the threaded pin 55 for the linear adjustment of the holding device engaging portion 1 'is achieved in the present case by a thumbscrew head 65 which is rotatably mounted in the direction of the longitudinal axis 57 of the threaded pin 55 elastically displaceable on the threaded pin 55 and thus by hand by the user or a helper can be served. However, it is also conceivable that the threaded pin 55 in the direction of the longitudinal axis 57 on one side has a Verstellende with a slot, Phillips or a screw head, which is adapted to engage with a wrench or screwdriver, which also causes a rotation of the threaded pin 55 and thus a Linear adjustment of the holding device engagement portion 1 'can be done.

In the present embodiment, the Flügelschraubenkopf 65 has a parallel to the longitudinal axis 57 of the threaded pin 55 protruding latching lug 67 and the mounting plate 47, in particular the guide rail 49, has a latching recess 69, wherein latching lug 67 and latching recess 69 are formed to attack each other. The wing screw head 65 is mounted by means of a coil spring 71 in the direction of the longitudinal axis 57 elastically on the threaded pin 55, so that the biasing force of the coil spring 71 presses the latching nose 67 of the wing screw head 65 in the latching recess 69. In order to rotate the threaded pin 55 on the wing screw head 65, thus first the wing screw head 65 against the biasing force of the coil spring 71 in the direction of the threaded pin 55 must be pulled away to bring the latching lug 67 out of engagement with the latching recess 69.

Further, a scale 73 is provided on the guide rail 49 in the direction of displacement of the holding device engaging portion 1 ', and a pointing means is provided on the holder engaging portion 1' so that the shifting state of the holder engaging portion 1 'with respect to the guide rail 49 can be seen. As a pointer means on the holding device engagement portion, an opening 75 is provided, through which a portion of the scale 73 on the guide rail 49 is visible.

The second embodiment of a protective helmet according to the invention can be used as follows. First, the headband engaging portion 21 and 25 of a mask holding bracket 29 of the respirator with the holder engaging portion 1 'of the attached to the helmet body mask holding device 45, as already described in connection with the first embodiment, engaged.

Subsequently, the seat of the respirator on the face of a user can be adjusted by turning the threaded pin 55, whereby the position of the retainer engagement portion 1 'relative to the guide rail 49 by the engagement of the thread 59 with the mating thread 61 of the mating threaded member 63 is adjusted. To rotate the threaded pin 55, the wing screw head 65 is first pulled parallel to the longitudinal axis 57 of the threaded pin 55 of the threaded pin 55 against the biasing force of the coil spring 71, wherein the locking lug 67 comes out of engagement with the locking recess 69. Now, the thumbscrew head 65 and thereby rotatably attached to the thumbscrew head 65 threaded pin 55 can be rotated by hand, whereby the holding device engagement portion 1 'along the scale 73 on the guide rail 49 is moved. The currently selected shift state on the scale 73 can be seen through an aperture 75 in the jig engagement section 1 '. One revolution of the wing screw head 65 corresponds to a shift stage on the scale 73. In this way, the adjustment of the mask holding bracket 29 relative to the helmet body can take place in predetermined uniform displacement stages.

Claims (12)

1. Protective helmet
   with a helmet body which is arranged to be worn on a human head and to protect this head,
   with a respirator mask comprising a mask body as well as a first and a second mask holding bracket which are connected on opposite sides to the mask body, and
   with a first and a second mask retaining device which are connected to the helmet body on opposite sides, wherein the first mask retaining device is intended to be connected to the first mask holding bracket, and the second mask retaining device is intended to be connected to the second mask holding bracket,
   wherein at least one of the first and second mask retaining devices comprises a retaining device engagement section (1, 1') and at least one of the first and second mask holding brackets comprises a holding bracket engagement section (21, 25),
   wherein the retaining device engagement section (1, 1') and the holding bracket engagement section (21, 25) are arranged to come into engagement with each other when the holding bracket engagement section (21, 25) is moved in an engagement direction (31) with respect to the retaining device engagement section (1, 1'), and
   wherein the retaining device engagement section (1, 1') comprises a base plate (3), a U-shaped stop wall (7) extending perpendicular to the base plate (3) and including a bottom section (11), two opposite branch sections (9a, 9b) and an opening (33) which faces in opposite direction to the engagement direction (31), and a cover plate (5) which extends parallel and at a distance to the base plate (3) at least partially between the branch sections (9a, 9b) of the U-shaped stop wall (7),
   characterized in that
   the inner surfaces (13a, 13b) of the branch sections (9a, 9b) facing each other comprise first a curved part, wherein the distance between the facing inner surfaces (13a, 13b) of the branch sections (9a, 9b) decreases in the direction towards the bottom section (11) in such a manner that the degree by which the distance decreases increases in engagement direction (31), and following the curved part in the direction towards to the bottom section (11) comprise a straight extension parallel to the engagement direction (31), and
   the inner surface (15) of the bottom section (11) facing the opening (33) comprises in the direction from the first branch section (9a) to the second branch section (9b) a straight section perpendicular to the engagement direction (31).
2. Protective helmet according to claim 1, characterized in that the curved inner surfaces (13a, 13b) of the branch sections (9a, 9b) facing each other are curved in such a manner that they extend along a circular path which touches the inner surface (15) of the bottom section (11) at one point.
3. Protective helmet according to claim 1 or 2, characterized in that the retaining device engagement section (1, 1') comprises a catch projection (17) which is formed on the base plate (3), which faces in engagement direction (31) and which may be elastically deformed in direction perpendicular to the base plate (3).
4. Protective helmet according to claim 2 and 3, characterized in that the catch projection has a flat extension in the plane of the base plate (3) or parallel thereto and comprises in the plane of its extension a contour (39) with a shape of a part of a circle, which contour extends in uniform distance to the circular path on which the curved, facing inner surfaces (13a, 13b) of the branch sections (9a, 9b) extend.
5. Protective helmet according to any of claims 1 to 4, characterized in that the cover plate (5) comprises in the direction to the opening (33) of the stop wall (7) a recess (41) which is rectangular in the plane of the cover plate (5), wherein the dimensions of the recess in this plane in the direction perpendicular to the engagement direction (31) corresponds to the dimension of the bottom section (11) perpendicular to the engagement direction (31).
6. Protective helmet according to any of the claims 1 to 5, characterized in that at least one mask retaining device (45) comprises a fixation plate (47) which is connected to the helmet body, in that the fixation plate (47) comprises a guiding rail (49) which is engaged by the retaining device engagement section (1, 1') in such a manner that the retaining device engagement section (1, 1') is coupled to the fixation plate (47) to be displaceable in a guided manner.
7. Protective helmet according to claim 6, characterized in that a threaded pin (55) is provided which is coupled to the fixation plate (47) to be rotatable about its longitudinal axis (57) parallel to the engagement direction (31) and to be not displaceable in the direction of the longitudinal axis (57), and in that the thread (59) of the threaded pin (55) is in engagement with a counter thread (61) of a counter thread element (63) of the retaining device engagement section (1, 1') in such a manner that a rotation of the threaded pin (55) causes a linear movement of the retaining device engagement section (1, 1') along the guiding rail (49).
8. Protective helmet according to claim 7, characterized in that the threaded pin is, seen along the direction of its longitudinal axis (57), provided on one side with an adjustment end comprising a single recess, a cross recess or a screwhead which are arranged to be engaged by a wrench or a screwdriver.
9. Protective helmet according to claim 7, characterized in that the threaded pin (55), seen in the direction along its longitudinal axis (57), comprises on one end a wing screwhead (65).
10. Protective helmet according to claim 9, characterized in that the wing screwhead (65) is in the direction of the longitudinal axis (57) of the threaded pin (55) elastically displaceable coupled to the threaded pin (55), in that the wing screwhead (65) comprises a detent (67) projecting parallel to the longitudinal axis (57) of the threaded pin (55), and that the fixation plate (47) comprises a detent recess (69) which is arranged to come into engagement with the detent (67).
11. Protective helmet according to any of claims 6 to 10, characterized in that the guiding rail (49) comprises a scale marking (73) and that the retaining device engagement section (1, 1') comprises an indicator which is arranged to indicate a displacement state of the retaining device engagement section (1, 1') relative to the fixation plate (47) on the marking scale (73).
12. Protective helmet according to claim 11, characterized in that as indicator an opening in the retaining device engagement section (1, 1') is provided, through which opening a section of the marking scale (73) on the guiding rail (49) disposed underneath is visible.

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