EP2209532B1 - Respiratory half mask - Google Patents

Abstract

The invention relates to a respiratory half mask with side straps (4) attached to a head support (3) and forming a single loop, a strap guide part (2) that is connected to a mask body (1) being held on said straps during an usage position on the face or in a position that is removed from the face and displaced downward, comprising a clamping element (26) that is attached to the strap guide part (2) for clamping the side straps (4) to the strap guide part (2) and for securely fixing the mask body (1) in the usage position.

Description

The invention relates to a respiratory half mask comprising a mask body equipped with front or side filters, a headband support with two sidebands extending therefrom and a band guide element fixed to the mask body for displacing the mask body along the sidebands from a use position into one includes the face releasing position.

Respiratory half-masks are used to cover the user's mouth and nose with a mask body formed with side filters or a front filter to protect the mask wearer from airborne pollutants and at least one exhalation valve. Usually, the half mask is held by means of a bandage connected thereto, consisting of side bands connected to a head support, on the head of the user. The harness and its connection to the mask body should be designed so that the respirator half-mask can be easily and quickly applied and removed or adjusted and beyond reliably sealing and with high comfort, even under the aspect of heavy filter elements and a high physical stress of the user, is held on the face of the mask wearer. An important requirement with regard to the ease of use of the respiratory half-mask is to remove the half-mask from the mouth and nose only temporarily, for example in order to be able to reach the mouth only temporarily or because the environment is currently free from harmful substances. Particularly complex is the application or removal of the half mask, if the harness with a head of the user supported headrest that is worn under a helmet that needs to be removed and replaced each time you put on or remove the respirator half mask.

From the EP 1 019 151 B1 For example, a respirator half-mask with a tape guide member attached to the mask body is known in which the two sidebands attached to a head support are each guided in an upper guide and a lower guide and are passed crossing from the upper guide to the obliquely opposite lower guide. The four guides form an advantageous four-point mount of the mask body on the user's face. The mask body can be displaced from the position covering a mouth and nose of the user to a position lying below the face or also in the opposite direction along the sidebands guided in the upper and lower guides. This means that the half mask can be put on or taken off relatively quickly and in a simple manner, without having to remove a protective helmet worn over the head support. However, the secure fit of the mask body and the reliable seal on the face are limited insofar as the mask body slip due to the weight caused by the filter and high physical stress of the user, especially in conjunction with between the mask body and face moisture forming on the face can and thus a reliable seal is not guaranteed. To clamp the mask body on the user's face, the sidebands adjustably mounted on the head support must be tensioned. The loosely suspended from the head support, intended for tightening the respirator half mask to the user's face ends of the sidebands are perceived by the user as disturbing.

One in the EP 0 808 641 B1 described respirator half mask has on the two outer sides in each case a tape guide element for each one connected to a head support sideband, the free ends of which have a closure element to connect the two ends behind the head can. The two tape guide elements have an elongated, arcuate slot in which the respective sideband can slide and in which it assumes the curved structure of the slot to frictionally engage the tape guide element but still being slidably movable. In this way, the half mask can be adjusted by overcoming the frictional forces from a position adjacent to the face in a nose and mouth releasing position below the face. The frictional forces are intended to prevent an automatic slippage of the half mask from the face. Apart from the fact that with the two tape guide elements only an unstable two-point mount the half mask is guaranteed on the face, it does not succeed with the help of the friction forces generated in the curved slot on the sidebands, the mask body safely on the sidebands - and thus on the face - to fix especially not with physical stress and corresponding shocks. An already proposed significant increase in the frictional forces on the guided in lateral tape guides sidebands is contrary to the requirement for a simple and quick adjustment of the half mask in the respective position and high wear or damage to the sidebands.

From the WO 03/033077 A1 For example, a respirator half-mask is known which also permits rapid adjustment from a mouth and nose sealingly covering position to a face-releasing, drooping position. To the Mask body is a tape guide member releasably attached to the two lower connection points each a length-adjustable neck band is attached, the free ends are connected to each other behind the neck of the user. Two side straps connected to a head support and running in lateral guides are attached to the lower edge of a locking flap pivotally connected to the strap guide member at the opposite edge. In the lowered, locked on the mask body position of the mask body is located on the face of the user. The sidebands can still be tightened on the headrest. The two neck bands are connected behind the neck and can also be re-tensioned. Swinging up the locking flap lengthens the length of the sidebands so that the respirator half mask can be removed from the face or - with the neck bands underneath the face suspended from the head support. This respirator half mask is disadvantageous, as well as the side bands neck bands must be provided and each must be tightened when creating the mask. In addition, the locking flap can easily solve, so that the respiratory protection is not guaranteed safe.

The invention has the object of providing a respiratory half mask of the type mentioned in such a way that a simple, quick donning and removal of the mask, a high level of comfort and a safe respiratory protection are guaranteed.

According to the invention the object is achieved with a trained according to the features of claim 1 respiratory half mask. From the dependent claims arise Further features and advantageous developments of the invention.

The basic idea of the invention consists in a respiratory half mask with a tape guide part provided on the mask body for adjusting the mask body along the sidebands, in that a movable or adjustable clamping element is attached to the tape guide part in order to move the sidebands by actuating the clamping element in the mouth and nose to clamp the covering position of the mask body to the tape guide member and thereby fix the mask body in the use position. Despite the high weight and high physical loading of the mask wearer due to the filter body or bodies, the half mask can not inadvertently slip into a position or be inadvertently adjusted in which the respiratory protection of the user is no longer guaranteed. Only after the release of the clamping element and the release of the connecting elements on the protruding downwards from the tape guide part ends of the sidebands of the band guide member connected mask body, if temporarily no respiratory protection is required to be moved along the sidebands in a remote from the face ready position. If necessary, the mask body with the tape guide member can be quickly moved back into the use position and fixed with the clamping element again on the sidebands, so that the mask body firmly against the face. Subsequently, the downwardly protruding from the tape guide part ends of the sidebands behind the neck of the user are connected together, so that the half mask at four connection points, namely two upper tape entry points and two lower tape exit points of the two - a single belt loop forming - sidebands on the tape guide part, reliably sealing held on the user's face.

According to a further feature of the invention, band friction webs are formed in the band guide part, with the aid of which the band guide part can be fixed to the side bands in a position corresponding to the position of use of the mask body. With such, achieved by applying the sidebands to the Bandreibungsstege default, which may be required in certain cases to protect the user, it is deliberately prevented that the respiratory half mask is moved despite dissolved clamping element in a remote from the face.

In a further embodiment of the invention, the tape guide part comprises two of its outer sides to the center extending upper tape guide channels and two of these preferably at an acute angle obliquely downwardly extending lower tape guide channels. The tape guide between the successive, each outside and inside of the tape guide part formed band guide channels via a Bandumlenkkante on which attack the clamping element and can fix the tape guide part with the mask body on the side bands.

The running on the outer surface of the tape guide part upper band guide channels have at the outer, the Bandumlenkkante opposite end each having a guide slot which defines the upper attachment point of the respective sideband, while the lower attachment points are formed by the tape outlet opening from the inside - lower - band guide channels. The inner, lower band guide channels are each bounded by a cover plate formed by the tape guide member and an integrally formed on the tape guide member mounting cylinder.

Preferably, the two Bandumlenkkanten are arranged opposite each other at a distance and form a clamping opening, in which a single clamping element can be moved to clamp both sidebands simultaneously at the respective Bandumlenkkante.

In an embodiment of the invention, the clamping element is a pivotally mounted on the tape guide part clamping lever, which is adapted in length and width to the size of the clamping opening. In the opposite longitudinal sides of the clamping lever clamping grooves are formed, which engage in the clamping position on the guided around the rounded Bandumlenkkante sideband and cause a locking of the clamping lever and a secure jamming of the sidebands.

In a further embodiment of the invention, the clamping lever is designed as a pivotable about a rotation axis plate, in the side edge surfaces of the clamping grooves are formed and on the upper side of a handle for actuating the clamping lever is formed.

In a further embodiment of the invention, the above-mentioned, integrally connected to the tape guide part, serving as a tape guide element mounting cylinder is provided with locking elements and attachable to a mounted on the mask body connecting cylinder and can be locked with this. When the terminal cylinder surrounds an exhalation valve integrated into the mask body, the outwardly facing open side of the mounting cylinder is covered with a protective grid. The connection cylinder can also be designed for attachment of a front filter. In this case, of course, the protective grid is missing.

In a further embodiment of the invention, two recessed gripping recesses are formed in the outer surface of the tape guide part, which allow easy handling of the respiratory half mask when creating or removing the face.

Fig. 1

eine perspektivische Vorderansicht einer Atemschutz-Halbmaske mit am Maskenkörper lösbar angebrachtem, ein Klemmelement aufweisenden Bandführungsteil;

Fig. 2

eine Schnittansicht der Klemmanordnung gemäß der Linie A-A in Fig. 1;

Fig. 3

eine perspektivische seitliche Ansicht der Atemschutzmaske in einem für die Benutzung vorgesehenen Zustand mit festgeklemmten und an den freien Enden verbundenen Seitenbändern;

Fig. 4

eine perspektivische seitliche Ansicht der Atemschutzmaske mit geöffnetem Klemmelement, jedoch in nicht vom Gesicht herunterziehbarem Zustand;

Fig. 5

eine Rückansicht des Bandführungsteils für die Seitenbänder bei geöffnetem Klemmelement gemäß Fig. 4; und

Fig. 6

eine Schnittansicht längs der Linie B-B in Fig. 5.

An embodiment of the invention will be explained in more detail with reference to the drawing. Show it:

Fig. 1

a front perspective view of a respiratory half mask with the mask body releasably attached, a clamping element having tape guide part;

Fig. 2

a sectional view of the clamping arrangement along the line AA in Fig. 1 ;

Fig. 3

a side perspective view of the respirator in a designated condition for use with clamped and connected to the free ends sidebands;

Fig. 4

a side perspective view of the respirator with open clamping element, but in nichtziehziehem from the face state;

Fig. 5

a rear view of the tape guide part for the sidebands with open clamping element according to Fig. 4 ; and

Fig. 6

a sectional view taken along the line BB in Fig. 5 ,

The respirator half-mask comprises a mask body 1 covering the face of a user in the area of the mouth and the nose, a detachably fastened on the mask body 1 Tape guide member 2 and a band consisting of a head support 3 and two side straps 4 attached thereto for holding the respirator half mask in a use position on the face or in a lowered or hanging down position below the face. In the case just described, the mask is removed from the face without removing the protective helmet, but can be quickly re-applied if necessary.

On the mask body 1, as is out Fig. 4 recognizable, a connecting cylinder 5 is provided, the - only in accordance with the in Fig. 4 illustrated embodiment - also for releasable attachment of a respirator front filter (not shown) is used. In this - in Fig. 4 version shown, two lateral exhalation valve seats 6 are integrated into the mask body 1. At the in Fig. 1 and 3 shown respirator half-masks with two side filter ports 7 of a centrally formed in the mask body 1 exhalation valve (not shown) surrounding the connecting cylinder is not visible. At the free ends of the sidebands 4 connecting means 8, 9 are mounted in order to connect the adjustable in a desired length elastic sidebands 4 behind the head or neck of the user to a single band loop (single-loop).

The two side bands 4 are guided in the tape guide part 2 attached to the mask body 1 for applying and removing the mask or held in the use position. The fastening of the tape guide part 2 takes place with the aid of an integrally formed on this fastening cylinder 10, which is plugged onto the connecting cylinder 5 on the mask body 1 and on integrally formed locking means can be latched thereto ( Fig. 4 ). In the case of the embodiment according to Fig. 1 and 3 in which the connecting cylinder (not shown) a centrally formed in the mask body 1 exhalation valve (not shown) surrounds, the mounting cylinder 10 is covered at the facing away from the mask body 1 air outlet side with a protective grid 11.

Two on the left and the right side at a distance from the peripheral surface of the mounting cylinder 10 formed cover plates 12, 13 of the tape guide part 2 form each with the spaced opposite outer surface of the mounting cylinder 10 an inner, lower - left and right - tape guide channel 14, 15. Nach at the top closes to the cover plates 12, 13 respectively an upper - left and right - lying on the outer surface of the tape guide part band guide channel 16, 17 with formed at its end guide slot 18, 19 at. In the upper band guide channel 16, 17 is in the band guide surface in each case a slot opening 20, 20 'formed in this arranged first band friction web 21, 21'. A second band friction web 22, 22 'adjoins the lower band guide channel 14, 15, respectively.

The transition between the upper, outer band guide channel 16 or 17 and the respectively angled abstrebenden lower, inner band guide channel 14 and 15 form two spaced parallel opposite rounded Bandumlenkkanten 23, 24 which define a clamping opening 25. At the clamping opening 25 is an adjustable clamping element 26, here in the form of a pivotable, two lateral clamping grooves 27 and a handle 28 having clamping lever arranged. At the tape guide part 2 grip recesses 29 are formed on the outer surface, which allow easy handling of the respiratory half mask.

• Das Bandführungsteil 2 ist mit seinem Befestigungszylinder 10 auf den am Maskenkörpers 1 vorgesehenen Anschlusszylinder 5 gesteckt und an diesem lösbar verrastet. Die oberen Enden der Seitenbänder 4 sind mit der Kopfabstützung 3 fest verbunden. Den Benutzer störende - herabhängende - Bandenden zum Einstellen der Bandspannung sind nicht vorhanden. Die Seitenbänder 4 sind über den Führungsschlitz 18 bzw. 19, den oberen, äußeren Bandführungskanal 16 bzw. 17, die Bandumlenkkante 23 bzw. 24 und den unteren, inneren Bandführungskanal 14 bzw. 15 im Bandführungsteil 2 geführt. Nach dem Verschieben der Atemschutz-Halbmaske entlang der Seitenbänder 4 in eine den Mund und die Nase abdeckende Position wird die Atemschutz-Halbmaske an den Seitenbändern 4 fixiert, indem die Seitenbänder 4 an den Bandumlenkkanten 23, 24 mit Hilfe des Klemmelements 26 fest verklemmt werden. Bereits zu diesem Zeitpunkt liegt der Maskenkörper 1 relativ dicht am Gesicht des Benutzers. Anschließend werden die Verbindungsmittel 8, 9 hinter dem Nacken des Benutzers miteinander verbunden und die Bandenden straff gezogen. Die Atemschutz-Halbmaske ist jetzt an vier Anbindungspunkten am Gesicht gehalten. Aufgrund des Festklemmens der Seitenbänder 4 an den zwischen oberem und unterem Bandführungskanal geschaffenen Bandumlenkkanten 23, 24 kann sich die Maske auch bei einem hohen Filtergewicht, starker körperlicher Belastung, auf die Atemschutz-Halbmaske wirkenden Stößen oder Schweißbildung am Gesicht nicht selbsttätig verschieben, so dass die Atemschutzfunktion der Maske jederzeit gewährleistet ist. Das Klemmelement 26 ist über seine Klemmnuten 27 an den Bandumlenkkanten 23, 24 verrastbar, so dass die Seitenbänder 4 sicher verklemmt sind und sich das Klemmelement 26 nicht unbeabsichtigt lösen kann. Andererseits kann die Atemschutz-Halbmaske nach dem Lösen des Klemmelements 26 leicht und schnell in eine unterhalb des Gesichts gehaltene oder - nach dem Lösen der Verbindungsmittel 8, 9 - hängende Position verschoben werden.

The function of the previously described tape guide part 2 is explained below:

• The tape guide part 2 is inserted with its fastening cylinder 10 provided on the mask body 1 connecting cylinder 5 and locked releasably on this. The upper ends of the sidebands 4 are firmly connected to the headrest 3. The user annoying - drooping - tape ends for adjusting the tape tension are not present. The sidebands 4 are guided over the guide slot 18 and 19, the upper outer band guide channel 16 and 17, the Bandumlenkkante 23 and 24 and the lower inner band guide channel 14 and 15 in the band guide part 2. After moving the respirator half-mask along the sidebands 4 in a covering the mouth and the nose position the respiratory half mask is fixed to the side bands 4 by the sidebands 4 are firmly clamped to the Bandumlenkkanten 23, 24 by means of the clamping member 26. Already at this time, the mask body 1 is relatively close to the user's face. Subsequently, the connecting means 8, 9 connected behind the neck of the user with each other and pulled the strap ends taut. The respirator half mask is now held at four attachment points on the face. Due to the clamping of the sidebands 4 on the created between the upper and lower band guide channel Bandumlenkkanten 23, 24, the mask can not move automatically even with a high filter weight, heavy physical stress, acting on the respirator half-mask bumps or sweating on the face, so that the Respiratory protection function of the mask is guaranteed at all times. The clamping element 26 can be latched via its clamping grooves 27 on the Bandumlenkkanten 23, 24, so that the sidebands 4 are securely clamped and the clamping element 26 can not accidentally solve. On the other hand, the respiratory half-mask 26 can be easily and quickly held in a below-the-face after release of the clamping member 26 or - after releasing the connecting means 8, 9 - suspended position to be moved.

In certain cases, it may be necessary to prevent the mask wearer from shifting the respiratory half mask from the face in the meantime. For this purpose, the band guide channels 14, 15 and 16, 17, the above-mentioned first and second band friction ribs 21, 21 'and 22, 22' are formed, around which the sidebands 4 can be placed so that the sidebands due to the frictional engagement between the Sideband and the pointed or edged frictional rib (s) are fixed to the tape guide part 2 and the mask can not be removed from the face even with dissolved clamping element 26 (non-drop-down position).

LIST OF REFERENCE NUMBERS

1

mask body

2

Tape guide part

3

head support

4

sidebands

5

connection cylinder

6

lateral exhalation valve seat

7

lateral filter connection

8, 9

connecting means

10

attachment cylinders

11

guard

12, 13

cover plate

14, 15

lower, inner band guide channels

16, 17

upper, outer band guide channels

18, 19

guide slots

20, 20 '

slot opening

21, 21 '

Upper band friction bar

22, 22 '

lower band friction bridge

23, 24

Bandumlenkkante

25

terminal opening

26

clamping element

27

clamping grooves

28

Handle

29

handholds

Claims (13)

1. Half-face breathing mask comprising a mask body (1) having front or side filters and exhalation valves, a head harness (3) comprising two side straps (4) which emanate therefrom and can be connected at the free ends, and a strap guide part (2) which is fastened on the mask body (1) for sliding the mask body (1) along the side straps (4) from a use position covering the mouth and nose into a position which exposes the face, characterised by at least one clamping element (26) which is adjustably fitted on the strap guide part (2) in order to clamp the side straps (4) to the strap guide part (2) and to fix the mask body (2) on the two side straps (4) in the use position.
2. Half-face breathing mask according to claim 1, characterised in that the two side straps (4) are each guided in an upper strap guide channel (16, 17) formed on the strap guide part (2) and, after deflection at a rounded strap deflecting edge (23, 24), are each guided in a lower strap guide channel (14, 15), and the clamping element (26) acts on the strap deflecting edges (23, 24), which are covered by a side strap portion.
3. Half-face breathing mask according to claim 2, characterised in that the two strap deflecting edges (23, 24) are mutually opposed and spaced apart and define a clamping opening (25) into which a common clamping element (26) can be moved so as to clamp both side straps (4) simultaneously at the respective strap deflecting edge (23, 24).
4. Half-face breathing mask according to claim 3, characterised in that the common clamping element (26) is a pivotally fastened clamping lever which is associated with the clamping opening (25) and comprises opposing clamping grooves (27), which are adapted in size and distance to the strap deflecting edges, and which, in the clamping state, encompass in part the respective strap deflecting edge (23, 24) having the deflected side strap portion and latch the clamping lever in the clamping position.
5. Half-face breathing mask according to claim 4, characterised in that the clamping lever is a plate, which is mounted pivotally about an axis at the upper edge of the clamping opening (25) and has a grip (28) and on which the clamping grooves (27) are formed in the opposing side faces of the plate.
6. Half-face breathing mask according to claim 2, characterised in that starting from the strap deflecting edges (23, 24), the upper strap guide channels (16, 17) on the mask body (1) extend laterally outwards and the lower strap guide channels (14, 15) extend laterally obliquely downwards at an angle of <90° to the upper strap guide channel (16, 17).
7. Half-face breathing mask according to claim 2, characterised in that the upper strap guide channels (16, 17) are formed on the outer surface of the strap guide part (2) and each have a guide slot (18, 19), at the end opposite the strap defecting edge (23, 24), defining the upper connection points of the side straps (4), and in that the lower strap guide channels (14, 15) extend on the inner side of the strap guide part (2) and the strap outlet openings thereof form the lower connection points of the side straps on the mask.
8. Half-face breathing mask according to claim 7, characterised in that the lower strap guide channels (14, 15) are formed by a fastening cylinder (10) and by cover plates (12, 13) of the strap guide part (2) which extend at a distance from the outer surface thereof.
9. Half-face breathing mask according to claim 8, characterised in that the fastening cylinder (10), which is connected integrally to the strap guide part (2), can be plugged onto a connection cylinder (5), fitted on the mask body (1), and is held thereon by means of latching elements.
10. Half-face breathing mask according to claim 9, characterised in that the connection cylinder (5) is applied around an exhalation valve, which is arranged centrally in the mask body, and a protective grid (11), which covers the air outlet opening and is formed by the fastening cylinder (10), is integrated into the strap guide part (2).
11. Half-face breathing mask according to claim 9, characterised in that the connection cylinder (5) is formed for the releasable fastening of a front filter.
12. Half-face breathing mask according to claim 2, characterised in that upper and lower strap friction webs (21, 21'; 22, 22') are associated with the upper and/or the lower strap guide channels (16, 17; 14, 15), on which webs the side straps (4) can be fixed, in the position of the mask body (1) covering the mouth and nose, in such a way that, even when the clamping element (26) is released, the mask cannot be moved into a position which is remote from the face.
13. Half-face breathing mask according to claim 1, characterised in that two recessed grips (29), which are spaced apart, are provided on the outer side of the strap guide part (2) for handling the half-face mask.

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