DE102020112736A1 - Shield to protect against contamination - Google Patents

Abstract

The present invention relates to a protective shield that is attached to a mouthguard / that is attached to at least one coupling element that is attached to glasses or a mouthguard, the protective shield covering the mouth area and also the eye area and the area of the front cheeks and from below the mouth to above the eyebrows.

Description

Field of invention

The invention relates to a shield-like or umbrella-like device for protecting against contamination of breathing masks or mouth-nose masks, those who wear such mouth-nose masks and patients. The device includes, in particular, the attachment of the protective shield in relation to the mouth and nose mask.

State of the art

Patent application document U.S. 4,944,294 (Borek 1988) describes a surgical face mask with mouth and nose protection and a transparent splash protection shield on top of the bridge of the nose and below the eyes, which covers the eyes and eyebrows. Here the filter area in front of the mouth and nose is freely accessible for contamination and this is the hygienic problem.

The patent specification is very similar WO / 89/10106 (Russel 1988) who also attaches a transparent splash shield above the mouth-nose mask, with the same problem of contamination of the filter itself, through which contaminated aerosol is then inhaled.

With some changes in detail, the patent specification also follows EP 1 045 651 B1 the aim is to attach an eye shield as a splash guard above the mouth-nose protection of a surgical mask, in particular with a lateral attachment. Here, too, the shield only covers the eye area above the cheeks and not the mouth and nose area, see in particular 1 and 4a the EP 1 045 651 B1 .

As a result, none of these prior art inventions offer any protection against contamination of the filter fabric itself, because the splash guard disks do not cover the filter fabric. So far, only massive protective masks, as described in EP 0 957 99 3 B1 are shown. However, these are very heavy masks that are very uncomfortable to wear and which are unreasonable for a dentist or surgeon, as well as for the patient.

Consequently, in view of the existing state of the art, there is a high risk that the mask wearer protects himself with an allegedly safe FFP3 mask, but then contaminates the patient via the exhalation valves without filter protection through aerosol ejection and accompanying condensate splashes.

Object of the invention

The object of the invention is to achieve significantly better protection, in particular of the mouth and nose area, the chin and the cheeks, from contamination by means of a moisture-impermeable protective shield. This can be achieved with low weight, good wearing comfort, yet low breathing resistance and good visibility and good communication.

Summary of the invention

The technology according to the invention is described by the features according to the independent claims. Further optional features of exemplary embodiments are described in the subclaims.

In particular, the mouth and nose area is to be covered by a shield which redirects and at least reduces the transport of droplets and aerosols between the wearer and a counterpart in order to thereby reduce its contamination. This shield should also cover the eyes and the lower forehead.

According to the invention, in a first aspect, a shield (protective shield, face shield) is proposed for protecting the face of a human wearer from contamination, in particular for protecting the mouth, nose and eyes, the shield having fastening means for fastening to at least one first aid, which is attachable to the head of the wearer, wherein the first aid can be arranged between the head of the wearer and the shield, and wherein the shield is of a size such that the shield attached to the first aid can extend over the face of the wearer, who carries the first aid. The use of a first aid is made possible by the protection against contamination by the shield under improved conditions, which is also used to fasten the shield.

The first aid preferably has a mask, in particular a respiratory protection mask. The mask can have a filter, in particular an air filter. The first aid can also be designed as glasses with a glasses frame, as a cap, in particular a baseball cap. The glasses are preferably designed as magnifying glasses. The shield is therefore particularly advantageous for medical professionals who can combine the aids required for the treatment with the shield, or who are protected from contamination by the shield during the use of the aids in the course of a treatment.

In a preferred embodiment, the fastening means has at least one recess through which a filter and / or a magnetic connection can extend. This ensures that a filter can be attached to the side of the sign facing away from the wearer, and the air can be filtered and fed to the wearer, who can inhale it on the side of the sign facing him. This also avoids fogging of the shield on the side facing the carrier, since the air exchange takes place through the filter, which is attached to the side facing away from the carrier.

In a preferred embodiment, the fastening means have coupling counterparts which can be connected, in particular reversibly connected, to coupling elements, in particular to coupling elements of a mask or a filter of a mask.

The connection between the shield and the aid can advantageously take place via a reversible mechanical connection, which can have a button connection, a Velcro fastener, a toggle connection or a magnetic connection. The coupling elements and the coupling counterparts correspond to the interconnectable parts of the button connection, the Velcro fastener, the toggle connection or the magnetic connection. A reversible connection is advantageous because the sign can be removed for cleaning or for attachment to another aid. Furthermore, by removing the shield, access to the aid, for example the mask, becomes free, so that the mask can also be changed separately. The coupling elements of the aids can also be combined with their fastenings for the tensioning elements or tension straps that lead to the ears or behind the head. This is advantageous since no additional fastenings are required on the aid.

The shield can also be attached to the aid in the middle with coupling elements at the front and / or placed on the forehead.

In a preferred embodiment, second aids, in particular a camera and / or a lamp, can be fastened to the shield by means of further fastening means. This is advantageous, for example, for a dentist who would like to see an area of a patient's teeth better illuminated during a treatment and would like to protect himself against droplets that arise from the patient's throat. Due to the additional possibility of attaching a camera and / or a light source, for example an LED, to the sign, the intended treatment of the dentist can be carried out with simultaneous protection against contamination.

In a preferred embodiment, the further fastening means have at least one recess. The additional recess in the sign can be used for magnetic clamping, whereby a magnet is attached to both sides of the sign so that the sign is wedged between the magnets. A recess in the shield increases the magnetic effect between the clamping magnets, and thus the clamping is strengthened, which in turn leads to a better attachment of the second aid, such as the camera or the light source.

In a preferred embodiment, the shield has a one-dimensional or two-dimensional curvature. The shield can be curved in the shape of a cylinder jacket, predominantly one-dimensionally, i.e. it can be bent from a film, as in FIG 4a and 4b shown. This results in a high mechanical stability in the shield against bending around the transverse axis, i.e. good stabilization of the lights or cameras attached above. Two-dimensionally curved masks, as they can be made from foils by deep drawing, are even more stable and close-fitting. Depending on the material and film thickness, the stability is more or less great. In a preferred embodiment, the shield has a deep-drawn film, the deep-drawn film determining a basic shape of the shield. The shield can also be designed as a foil disk. The shield can also be designed in the shape of a shell or have bevelled flat areas.

The shield advantageously has a size so that the shield can extend over the entire face of the wearer, so that contamination, for example of the eyes, is also avoided. The width of the shield can be flexibly adjusted to the width of the head. The necessary adaptation results from the dimensions of the mask, the position of the coupling elements and spacers which can also be used and which can be arranged between the shield and the aid or between the shield and the front part of the wearer.

In a preferred embodiment, the shield has a size so that the shield can extend over the entire face and below the chin, following the outer contour of the head, in the direction of the neck of the wearer, approximately. The shield preferably has a size such that the shield can extend over the entire face, following the outer contour of the head, over at least part of the forehead portion of the wearer. An additional enlargement of the shield offers the wearer one Improved protection, for example when the wearer's head moves, which could allow a facial area to be contaminated with a smaller shield.

In a preferred embodiment, the shield is impermeable to liquids. In the course of treatment of patients, contamination of a doctor by droplets from the patient, such as occur, for example, during dental treatment, is possible. It is therefore advantageous if the shield is impermeable to liquids.

In a preferred embodiment, the shield has at least one transparent section, the transparent section being arranged in particular in the field of vision. For use in the medical field, it is necessary that the field of view of the sign is transparent. The shield is transparent, at least in the eye area, with a high-quality appearance and low-interference, so that the field of vision is only slightly impaired. The sign can also be transparent over this entire surface. It is also advantageous if the field of view is of optically high quality.

In a preferred embodiment, the shield has polycarbonate or an acetate film. Another mechanically sufficiently stable and transparent plastic can also be used. Shields that are made of gorilla glass in the visible area are also possible, so that a visually high quality is achieved when looking through the shield.

In a preferred embodiment, the shield has an anti-reflective coating and / or an anti-fogging layer (anti-fog), each of which is arranged on the side facing the wearer. These coatings ensure a clear view for the wearer through the sign or at least through the transparent area of the sign.

In a preferred embodiment, the shield has a thickness of 0.10 mm to 0.8 mm, particularly preferably between 0.20 mm and 0.50 mm. A small thickness enables the shield to be easily bent into the desired shape for attachment to the aid and results in a correspondingly low weight.

In a preferred embodiment, the shield has a weight between 4 and 60 grams, particularly preferably between 10 and 30 grams. The low weight allows the shield attached to a breathing mask or magnifying glasses to be worn comfortably, even over a longer period of time, as can occur during operations.

In a preferred embodiment, the shield is made in one piece and made of impact-resistant material such as polycarbonate or physically or visually similar plastics. This avoids connection points which can become brittle over time.

In a preferred embodiment, the shield is dimensionally stable under its own weight or the shield adapts to a flat support surface under its own weight, whereby it is brought into an at least one-dimensional bend by fastening elements in the fastened state.

According to the invention, in a second aspect, the use of a shield to protect the face of a wearer from contamination is proposed, in particular to protect the mouth, nose and eyes, for attachment to at least one first aid.

According to the invention, in a third aspect, a mask (mouth and nose protection) for protecting the mouth and nose of a human wearer from contamination is proposed, comprising holding elements for fastening the mask to the wearer's head, and coupling elements for connecting to fastening means of the shield.

The mask can have filter elements for filtering air. The filter elements can consist of fabric or fleece or foam mats or granules, the filters can have a monodirectional or multidirectional effect.

In a preferred embodiment, the mask has retaining elements, in particular retaining straps, which can be connected to coupling counterparts of the shield.

In a preferred embodiment, the mask has a seal which is arranged between the mask and the face of the wearer. In particular, the seal should be arranged circumferentially around the mouth and nose, so that the mouth and nose are protected against contamination that could occur through the intermediate area between the mask and face.

According to the invention, in a fourth aspect, a shield arrangement is proposed, comprising a shield according to one of the previous embodiments according to the first aspect of the invention, and a mask according to one of the previous embodiments according to the second aspect of the invention, the shield and the mask being connectable to one another are.

The connection between the shield and the mask can advantageously be reversible mechanical connection take place, which can have a button connection, a Velcro fastener, a toggle connection or a magnetic connection. A reversible connection is advantageous because the sign can be removed for cleaning or for attachment to another aid. Furthermore, by removing the shield, access to the aid, for example the mask, becomes free, so that the mask can also be changed separately. The coupling elements of the aids can also be combined with their fastenings for the tensioning elements or tension straps that lead to the ears or behind the head. This is advantageous since no additional fastenings are required on the aid.

It is also possible for the mask and the shield to be connected to one another in a form-fitting or material-fitting manner. For example by a screw connection or an adhesive connection.

In a preferred embodiment, the shield and the mask can be connected to one another by means of the coupling elements and the holding elements. This means that no additional connecting elements are required on the mask.

In a preferred embodiment, the mask is positioned between the shield and the wearer's face.

In a preferred embodiment, the shield is attached to an air filter of the mask, which is attached in front of the wearer's mouth and nose. The shield is advantageously attached to the air filter by means of a clamping arrangement.

In a preferred embodiment, the shield has at least one recess through which a filter and / or a magnetic connection can extend. The filter is connected to the mask. It is thereby achieved that a filter can be attached to the side of the sign facing away from the wearer, and the air is filtered and fed to the wearer, who can inhale it on the side of the sign facing him. This also avoids fogging of the shield on the side facing the carrier, since the air exchange takes place through the filter, which is attached to the side facing away from the carrier.

In a preferred embodiment, the shield is arranged at a distance from the mask, so that air can circulate between the mask and the shield. The spacing of the shield from the mask can be achieved by a spacer which defines a distance between the shield and the mask. The spacer can also be arranged between the shield and the air filter.

To avoid vibrations that affect the light spot of a lamp or the image focus of a camera, the shield can have additional supports (spacers), e.g. on the mouth-nose mask or on the forehead.

The shield can be coupled to a gas-permeable hood with filter effect on the side, bottom and or top to achieve even more protection against contamination.

The mouth nose filter (see 3a or 4a) can optionally contain active respiratory support, for example electrical ventilation when breathing in.

The mouth-nose filter can contain blow-out valves from which the exhaled air escapes when there is excess pressure in the mask. These are preferably behind the shield and thus the exhaled air preferably does not flow to the patient or opposite.

The inhaled and / or exhaled air can be deflected by the shield so that it does not flow directly to someone opposite or to the patient, but to the side or upwards and or downwards.

In a preferred embodiment, the inside of the shield is spaced apart from the outside of the mask facing the inside of the shield in a large part of an overlapping area of the mask and shield.

Light sources and cameras can be attached to the sign, which illuminate a work area and, if necessary, record it at the same time. The lighting means can be controlled as a function of position and direction, in particular in order to only activate them when the beam hits the appropriate areas.

In addition to a light source, the lighting means can also contain electronics, sensors, accumulators and contacts as well as line elements; they can be rechargeable or contain replacement batteries or be connected to battery housings or power sources by cables.

In addition, the attachment of a lightweight, ultra-compact lamp and / or other optical or electronic devices directly to the protective shield is proposed, especially if these accessories, such as a bright but light and well-focused head lamp, are to be attached in front of the shield. For this, the protective shield should be fixed and sufficiently stable be vibration-free so that the light spot of the lamp does not vibrate unintentionally.

Particular benefit of the invention

The invention improves hygiene and protection against contamination, in particular for doctors or dentists who treat patients. In particular, it improves the protection against contamination by splashes and / or aerosol transmission from the wearer of the mask to the patient or the person standing opposite. This is all the more important because conventional breathing masks according to FFP2 or FFP3 standard have blow-out valves and these mostly unfiltered valve outlets do not prevent the transfer of the aerosol from the mask wearer to the patient. The protective screen according to the invention works here by catching splashes and diverting the air flow. The invention thus produces significantly improved patient protection and wearer protection. The invention also includes the mechanical connection between this protective shield and the mouth and nose mask as well as between the protective shield and attachable accessories, such as a light LED light attached to the top of the screen to illuminate the operating area. It should be emphasized that the protective shield also avoids touching the mask and in particular the air-sucking filter area itself. Taken together, this means far greater protection for the wearer of the mouthguard. Due to the intermediate shield, which allows a comparatively unimpeded supply of breathing air, the air resistance is not measurably increased when inhaling or exhaling. This is very advantageous, especially if you wear them for long periods of time. Nevertheless, the protective shield and the modified air flow prevent the blown out aerosol from hitting the patient directly, which in particular better protects the patient or the person opposite and overall reduces the formation of contaminated aerosols. In combination with a good mouth-nose protection, this provides very good protection against contamination with at the same time very little impairment of vision, breathing and communication.

The proposed solution includes a protective shield against contamination that covers the mouth and nose area and also the eye area. The protective screen is preferably fastened directly to the breathing mask or to the mouth and nose protection with fastening elements or via spacers.

• • durch Hände auf den Mund-Nase-Schutz und auf die Gesichtsumgebung inklusive Augen und teilweise Kinn, Wangen, untere Stirn.
• • durch Tropfen oder Spritzer oder Aerosole vom Patienten, insbesondere aus dem Behandlungsgebiet auf den Maskenträger oder auf die Maske, insbesondere im Bereich des Lufteinlasses
• • vom Maskenträger auf dessen Hände oder auf Instrumentarium, insbesondere aus dem Bereich des Luftauslasses auf das Behandlungsbesteck und oder die scheinbar sterilen Handschuhe
• • durch Tropfen oder Spritzer oder Aerosole vom Maskenträger auf den Patienten bzw. Gegenüber, insbesondere aus dem Bereich des Luftauslasses

Lufteinlass und Luftauslass liegen grundsätzlich an einem Ausgang des Mund-Nase Schutzes liegen, der zwischen dem Patient und dem Maskenträger und im Bewegungsbereich der Hände liegt.
Ein Aspekt der Offenbarung umfasst einen bevorzugt leichten und dünnen aber dennoch ausreichend mechanisch robusten Schutzschild. Dabei findet die lösbare Befestigung des Schutzschildes bevorzugt an mehreren entsprechend vorbereiteten Auflagepunkten direkt an dem Mund-Nase-Schutz statt. Diese Befestigung sorgt für eine gleichbleibende Ausrichtung relativ zur Kopfposition, und zwar soweit die Maske relativ zur Kopfposition befestigt ist. Für den Fall, dass der Schutzschild allein mit dem Mund-nase-Schutz verbunden ist, bewegt sich der Schutzschild mit dem Mund-nase-Schutz mit. Für den Fall, dass der Schutzschild mit einer anderen Kopfhaltevorrichtung verbunden ist, bewegt er sich mit diesem Kopfhaltegestell mit, wobei es sich dabei um eine Brille handeln kann oder um eine kopfgetragene Spange. Für den Fall dass der Schild sowohl mit Mund-Nase-Schutz als auch einem Kopfhaltegestell wie einer Brille verbunden ist, entsteht eine besonders stabil relativ zum Kopf festgelegten Position des Schutzschildes. Dies hat mechanische und optische Vorteile, insbesondere sobald Zubehörteile wie z.B. leichte LED leuchten direkt am Schutzschild befestigt werden.In the following, the term mouth-nose protection is used for the group of textile surgical masks, mouth-nose masks that seal with rubber elements and breathing masks that are molded directly onto the individual mouth-nose area and other variants, regardless of which protection class FFP1, FFP2, FFP3 or without an FFP certificate have these devices.
The core of the benefit of the invention is the bidirectional protection against droplet transfer and aerosol transfer, which takes place without additional shields. The contamination risk to be reduced includes in particular the transport of contamination material

• • with hands on the mouth and nose protection and on the area around the face including eyes and partly chin, cheeks, lower forehead.
• • by drops or splashes or aerosols from the patient, in particular from the treatment area onto the mask wearer or onto the mask, in particular in the area of the air inlet
• • from the mask wearer to their hands or to instruments, especially from the area of the air outlet to the treatment instruments and / or the apparently sterile gloves
• • by drops or splashes or aerosols from the mask wearer on the patient or opposite, in particular from the area of the air outlet

The air inlet and air outlet are generally located at an exit of the mouth and nose protection, which is between the patient and the mask wearer and in the range of movement of the hands.
One aspect of the disclosure comprises a preferably light and thin but nevertheless sufficiently mechanically robust protective shield. The releasable attachment of the protective shield takes place preferably at several correspondingly prepared support points directly on the mouth and nose protection. This fastening ensures a constant alignment relative to the head position, to the extent that the mask is fastened relative to the head position. In the event that the protective shield is connected solely to the mouth and nose protection, the protective shield moves with the mouth and nose protection. In the event that the protective shield is connected to another head-holding device, it moves with this head-holding frame, which can be glasses or a head-worn clasp. In the event that the shield is connected to both mouth and nose protection and a head support frame such as glasses, a particularly stable position of the protective shield is created relative to the head. This has mechanical and optical advantages, especially as soon as accessories such as light LED lights are attached directly to the protective shield.

The difference to the state of the art becomes clear as soon as the previous devices (see 1a) compares with the device according to the invention in a very simple embodiment (see 2a) . According to the state of the art, a small protective shield covers the eye area whole and the lower part of the forehead partially, but not the area of the mouth and nose protection and its surroundings. Unfortunately, however, these lower areas are particularly exposed to the risk of contamination.

The proposed improved solution covers in particular the mouth and nose area and its surroundings and also the eye area and at least partially the forehead of the mask wearer. Another special feature is that the shield is attached directly to the mouth nose protection or to the breathing mask, preferably via detachable attachment points which can be designed to be Velcro-like, magnetically, hole-like or mechanically encrypted. It is known to attach a transparent protective screen to the top of an operating theater mouth and nose protector, e.g. via a connecting seam. According to the invention, however, a visor is coupled here, preferably reversibly detachable and coupled again, the visor covering at least the mouth and nose area and the eyes and part of the surrounding face over a large area. The visor or the protective shield can be partially flat or curved over a large area at least in one direction or, if necessary, also curved in two spatial directions and thus pulled backwards under the chin in the direction of the neck for better protection and better deflection of the breathing air to reach. This can be of great use, especially for dentists, because the splashes mainly come from the patient's mouth and can otherwise fly from below the shield to the face and mask of the person wearing the mask.

1a shows the state of the art with a transparent protective shield attached directly or laterally above the mouth / nose guard 20th . However, this only covers the eyes and eyebrows, but not the mouth-nose area itself. Drops and aerosols can therefore protect the mouth and nose 10 and the filter cloth 11 contaminate.
The improved contamination protection is characterized in that the protective shield is in front of the mask or the mouth-nose protection and deflects the path of the breathing air as far as it is not filtered through the filter, i.e. when coughing and if there are exhalation valves on the mask. This means that contamination can be better reduced or prevented.

The intended effect can be achieved by various embodiments and various combinations of the embodiments.

In a preferred embodiment, the protective shield is curved approximately cylindrically, that is to say it was bent from a flat sheet and is stabilized in the bent shape by mechanical holding elements. This can result in an additional slight bend in further directions of curvature, which, however, is to be understood as an evasive distortion of the curved surface element.

In another embodiment, which is very preferred depending on the application, the protective shield is curved in two spatial directions, that is to say it is arched in the shape of a shell like an ellipsoidal section. This shape creates a mechanical inherent stability of the protective shield, but can also be mechanically braced by holding elements and the geometry of the head and the mouth-nose protection can be adapted, which further increases the mechanical stability.
In a preferred embodiment, the protective shield is attached to the mouth-nose protection via at least three, preferably at least four contact points or contact areas, whereby a sufficient distance from the face is achieved so that the breathing air can flow and preferably also so that facial movements do not result in movement of the protective shield. In a particularly preferred embodiment, this is achieved by fastening elements which can have spacers and or which are raised above the surrounding areas of the mouth-nose protection.
In another preferred embodiment, the protective shield is coupled in the upper area to a head frame by mechanical coupling points, in particular to glasses that are mechanically stable on the head, for example magnifying glasses, as are often worn by dentists. In this case, the protective shield preferably runs at a small distance in front of the optics of the magnifying glasses, so that vibrations of the shield are not transmitted to the magnifying optics. In an expanded embodiment, the distance between the protective shield in front of the head frame and, if necessary, in front of the magnifying optics is achieved by a mechanically stable coupling spacer that is coupled to the upper head holder, in particular to the spectacle frame. The mechanical coupling to the spectacle frame is preferably carried out by means of a magnetic connection that is encrypted in six spatial dimensions (three translation and three rotation) or by other similarly acting connecting elements. The spacer is therefore attached proximally to the upper head holder / on the spectacle frame and carries the protective shield distally, in particular by means of a counter-holding clamping element that generates a clamping force on the spacer that can hold the shield. The shield at this point consists of a thin layer of glass or plastic or some other film. In the preferred case, the mechanical clamping force is sufficient to hold the film without further retention elements and to adequately secure it not only against slipping but also against twisting. In another In the exemplary embodiment, mechanical retentions and / or openings through the shield are provided at the clamping point in order to fix the mechanical fixation relative to the head mounts and in particular in the position relative to the head of the mask wearer. In one group of embodiments, the protective shield is attached to the mask directly or via spacers. 2a . shows a simple form with textile, mesh, fleece or fabric filter. The mouth-nose protector is attached to the ears, for example, or to the head with straps. The shield 30th is attached to the mouth nose protection.

3a also branches an attachment of the shield to a breathing mask and likewise 4a . So has peculiarity the shield 30th by means of opening 37 at the end piece 47 attached to the filter cartridge. The mouth-nose part of the mask itself, which carries the filter cartridge and shield, is attached to the head or ear with ribbon elements etc.
4a shows another embodiment with an adaptable or 3D adapted edge and a stable frame element which carries a filter area at the front, the filter mats being exchangeable. On the side of the mouth-nose mask are fixing elements for the retaining straps 15th available.
What these embodiments have in common is that a mechanical chain of connections is built up which ultimately attaches the mask or the mouth and nose protection to the head and the protective screen at least at several points of support on the mask / on the mouth and nose protection. Further support points directly or via mechanical spacer elements on the head are possible, usually also helpful for stabilizing against vibrations, but not absolutely necessary.
For a further explanation, see 3a , 3b and 3c The protective shield comprises an opening with a diameter of at least 10 mm, which can accommodate a connecting element or an adapter piece, through which at least part of the breathing air can flow and to which a filter element can be coupled distally, which is preferably designed to be exchangeable. In the vicinity of the breakthrough through the protective shield, there are at least three support points or a flat, extended support area, preferably in a round, oval or partly round-cornered ring shape, through which a mechanical holding force is achieved between the mouth and nose protection and the protective shield. This holding force or the holding torques stabilize and fix the protective shield relative to the front distal area of the mouth and nose protection in the vicinity of the connecting element. In a further developed embodiment, the mouth-nose protection in the area of the connecting element can be stabilized by internal and hygienically covered lightweight structures, in the sense of a cancellous or trabecular-filled body with a compact cover, with this area merging into a circumferential, partially elastic or plastic-like shape Area that performs the sealing function and that surrounds the mouth and nose area. The combination of these embodiments achieves a very good and long-term pleasant tightness of the mouth-nose protection on the face of the wearer and at the same time very good mechanical stability of the connection area to the protective shield and, if necessary, to the filter element. The mechanically stable and well sealable mouth and nose protection is attached to the wearer's head by means of sufficiently strong tension strap elements, a head strap with a branched strap design being preferred in order to avoid slipping off the occiput. The fastening of the tension straps on the wearer's ears is possible, but usually less resilient and consequently not quite as positionally stable, so this is only possible for particularly light embodiments or in combination with other head-mounted fastening elements such as glasses with the protective shield being coupled to additional ones Breakpoints.

5a shows a shield with a special fastening technique not directly on the mask, especially in the case of mechanically unstable mouth and nose masks. The shield is preferably held centrally above the center of the eye by a clamping device, with magnetic clamping, preferably directly on the shield material, which can have an opening for contact with the magnetic clamping elements. Using a spacer 60 a sufficient distance is achieved between the glasses and the shield for the eyepieces and lenses of the magnifying glasses. 5b shows the clamping mechanism in detail.
6a shows a clamping device for lamps and / or cameras that can be attached directly to the sign. This means that the optical element camera, lamp, sensor, etc. can be attached directly to the sign 30th can be attached, if necessary several of them at the same time. The weight of the camera and / or lamp including the battery is between 5 and 40 grams, preferably between 10 and 30 grams, in the case of a lightweight construction. 6b shows an attachment with this magnetic clamping device on top of a sign according to the invention.
What the different embodiments have in common is the solution to the problem of attaching any accessories required, such as light LED lights, in front of the protective shield, in particular in order to avoid disruptive reflections, absorptions and heating of the protective shield.
The proposed solution comprises at least one first clamping device that carries the accessory, for example the LED light, and a second counter-clamping device that, together with the first clamping device, generates a clamping force or holding force, preferably by magnetic action or by other mechanically comparable forces. In the preferred embodiment, an LED lamp or a camera comprises an alignable element and a first clamping element to to be able to adjust and fix the orientation of the LED lamp or a camera relative to the protective shield. The preferred variant comprises a mechanically stable spacer with a second clamping element on the distal side and a third clamping element on the proximal side facing the head frame / glasses frame and the head frame / glasses frame includes a fourth clamping element that generates a clamping force with the third clamping element with which the spacer is fixed in a stable manner relative to the holding frame / glasses frame. This mechanical chain of clamping elements firstly attaches the protective shield between the first and second clamping elements and also this group of elements or devices on the holding frame / glasses frame. In addition, further clamping devices can be attached, which also help to stabilize the protective shield relative to the head of the wearer.

DESCRIPTION OF PREFERRED EMBODIMENTS

In the following description of preferred embodiments of the present invention, the same reference symbols designate the same or comparable components.
1 : State of the art: eye protection on top of the surgical mask.
1a shows schematically sketched the side view of the head 1 the wearer of the mouth and nose protection 10 with eyes 2 , Ears 3 , Nose 4th , Mouth 5 and chin 6th . mouth 5 and nose 4th are covered by a mouth and nose protector 10 that acts more or less well as a filter. 1b . shows the arrangement from above. The material 11 is usually a fabric, preferably multilayered. Wrinkle structures are usually used for individual adaptation to the shape of the face 12th There are many variants on the market, including those with a stable frame and adjustable deformation elements. The known mouth and nose protection optionally has a connection area to an eye shield at the top 20th , connected via connection area 23 . The protection of the visor 20th can partially cover the forehead and have a curvature 22nd have that follows the forehead. The material 21 is at least in the eye area 2 transparent, circumferential non-transparent edges are possible, as well as further connection areas for connection to hoods, etc. Despite all these details, this device has serious hygienic deficiencies, because it splashes unhindered on the face mask. The wearer can also touch this mouthguard unhindered, which often happens unconsciously. This happens because the mouthguard is not covered but openly accessible. Since the mouthguard is usually damp, it is a breeding ground for germs. In addition, the mouth and nose can provide protection 10 In the case of rapid air movements, for example when coughing or speaking, an aerosol exposure can result that can affect the patient. It is particularly important to prevent this risk of contamination. The mask 10 basically has a filter area 11 that can be contaminated by splashes and / or aerosols. The tension belt or the elastic band 15th keeps the mouth and nose protection 10 on the ears 3 , the protection can be on the front of the nose 4th are present, but here too there is a risk of contamination that can be passed on to the patient. The optional protective shield above 20th is very close fitting or also inclined forward, with a seam 23. The material 21 of eye protection 20th is usually colorless and transparent. A characteristic of the group of these variants is that the breathing air can flow to the patient when exhaling. This also applies in particular to the variants with side blow-out valves, as they are used in particular to protect against chemicals, although these have a high protection class for the wearer, but poor protection for the patient or the patient. This is because contaminated material and possibly also liquid collects at the blow-off valve through condensation and is then ejected as drops or aerosol.

1a shows the state of the art with a textile mouth-nose protection 10 and above a coupled eye protection shield 20th which, however, leaves the mouth and nose area free. The consequence is the danger of the filter area 11 , 12th to contaminate, by touch and by splash. The nose 4th is covered by the filter element or textile or other materials, the mouth 5 likewise and in the vast majority of embodiments also the chin 6th . The disadvantages are described above. The air flowing out through the filter 8th can reach the patient directly and contaminate it with aerosol. 1b shows the same device systematically from above. You can see the joint 23 to the eye shield to the mouth nose protection 10 is coupled. The filter fabric 11 lies openly unprotected. The eyes 2 are covered by the splash guard. Both are together via the rubber bands 15th held, who prefer to hold on to the ears.
The unhindered transfer of contaminated air or drops between the wearer and the patient endangers the patient in an unreasonable way with many FFP3 masks in use by the dentist. Most of the time, this high risk is not discussed, but in order to contain the spread of infectious diseases it is very important to at least reduce the contamination burden for both parties involved, the mask wearer and the patient on both sides.

2 : On the side of the mouth, nose guard, stuck protective shield
2a shows in side view the head of the wearer 1 with attached mouth and nose protection 10 and with the protective shield attached 30th . 2 B shows the constellation from above. The protective shield 30th is preferably one from below the chin to above visor reaching the eyebrows. Tas material is waterproof and transparent at least in the field of vision of the eyes, preferably also in the other areas. It can be a thin layer of polycarbonate or acetate or of another optically sufficiently transparent material that does not disturb the view of the wearer. The film can also be coated, in particular to reduce reflections and to avoid fogging due to condensing moisture from the breathing air. The protective shield 30th with its coupling devices 34 , 36 is mechanically directly via coupling elements 14th and 16 or indirectly via spacer elements to the mouth and nose protection 10 coupled so that its relative position and spatial orientation is largely fixed relative to the head of the wearer. The necessary holding power for mouth and nose protection 10 is thereby increased, depending on the weight and shape of the mouth-nose protection and the protective shield, in particular also on the distance of the shield from the face. If necessary, further breakpoints can be introduced between the protective shield and the head, which are in 2a and 2 B are not shown here. The mounting of the mouth and nose protection is shown schematically 10 partly elastic loops 15th that are around the ears 3 be guided. The starting point of the holding device 15th can with the coupling points 14th , 16 coincide for the shield or be made separately. It is characteristic that the entire mouth and nose area and thus also the mouth and nose protection 10 is covered. The contamination of the filter element 11 is thus prevented. In addition, we control the flow of the exhaled air 9 diverted, in particular in the example of use by a dentist it no longer hits the patient directly when exhaling or coughing. Optionally, the mouth-nose protection carries an adjustment element 17th for sealing adaptation, in particular to the individual contour in the nasal area, in order to prevent the humid air from escaping in the direction of the eyes, in particular to avoid fogging up of spectacle lenses and self-contamination of the eyes. This simplified arrangement avoids touching the mouth-nose mask and the face. In addition, splashes coming from the patient are intercepted and the transfer of the contaminated exhaled air directly to the patient when coughing or when the exhalation valves open is prevented.

2a shows a preferred embodiment of the protective shield 30th with a bowl shape drawn at the chin towards the back of the neck, which may be necessary to avoid spray contamination from below, e.g. when used in dental medicine by the dentist. This form of the splash guard also reverses this 30th the outflowing breathing air is shown schematically by the arrows 9 following deflected and does not flow directly to the patient. This protects the patient from contamination. The coupling elements 14th , 16 on the mask correspond to spacer elements 34 , 36 on the shield 30th to keep the shield a distance from the cheeks on the side of the face. The attachment of the mask 10 at which the shield 30th attached is done on the ears 3 or on the head 1 of the wearer. Preferably with partially elastic band elements 15th . 2 B shows the protection at the mouth snacking 10 fortified shield 30th from above, analogous to 1a . The mouth and nose mask 10 itself is attached to the head with sufficiently stable tension straps, for example leading backwards above and below the ears, preferably also with partially elastic and superficially adhesive tension straps that can be easily fixed to the occiput. The fastening of the ligaments 15th on the ears 3 is only one of the possibilities and in many cases is not sufficiently stable over the long term, it can be arranged very easily without any additional elements on the sign 30th but quite functional. The protective shield 30th can have a bowl-shaped shape as shown, but it can also be in the shape of a cylinder jacket (see 4a and 4b) or include beveled flat areas.

2c shows an embodiment of the protective shield 30th with coupling elements 34 , 36 which are used for coupling to the coupling elements 14, 16 on the mouth and nose protection. Due to the ellipsoidal curvature in 2 spatial directions, the shield in this exemplary embodiment has a comparatively spatially stable shape of its own even without the coupling. For an alternative embodiment of the shield 30th Without a shell shape, the curvature requires attachment to at least 2 places, such as three places on a spectacle frame, in the front and on the left and right sides or on the mask., see 4a and 5a .

3 : Attachment of the protective shield with a central clamping piece
3a shows a further embodiment in a simplified schematic representation in side view. 3b and 3c show the constellation viewed from above. The protective shield 30th or the visor is here on a central coupling element 47 on the breathing mask, which is mechanically stable, at least in this area 40 attached. The mouth and nose protection 40 has more the form of a respirator with a preferably exchangeable filter element 41 , which can preferably be reached from the outside to change the filter, preferably without having to remove the mask.

4a and 4b shows the mask 40 . This mouth and nose protection 40 includes an individually adaptable sealing area 46 that fits all around the mouth and nose as comprehensively and as tightly as the protection classes require, e.g. for a tightness of at least 95% for FFP3 masks. The sealing area is in the choice of material and Material thickness designed so that it can lay on the wearer's face without undue stress in order to achieve sufficient tightness. For this, the tension elements 15th Provide sufficient strength, although this can usually no longer be achieved by attaching the ears. The shape of the mask 40 can be based on individual 3D data of the head 1 have been determined by the wearer, i.e. have an individual fit. The sealing area 46 especially extends over the nose 4th and under the eyes 2 . Flexible elements, for example foam elements or sealing lips, can be used in places where there is little flexibility. The material of the protective shield is at least in the coupling area 37 stable enough to hold the protective shield 30th transferred to. Preference is in the shield 30th a breakthrough 37 , with a diameter of preferably at least 10 mm, particularly preferably at least 20 mm. Through this breakthrough 37 of the shield 30th carries an adapter piece that has a clamping effect and a sealing effect between the mask 40 and umbrella 30th can generate. In the vicinity of the implementation or directly as part of the implementation, mechanical encryption elements are preferably attached, which provide spatial orientation between the mask 40 and shield 30th produce. Alternatively, the shield 30th around the environment of the opening 37 in its orientation solely through the frictional force on the clamping element 47 held and fixed. Distally beyond the protective shield 30th can the filter element 41 to the airway of the mask 40 be connected. For this purpose, different filter variants are preferably available that are actually attached to the adapter 47 let connect. The mask 40 is also without the protective shield 30th usable, but then with an increased bidirectional risk of contamination. This mask too 40 has at least 2 fasteners 44 , 46 that with coupling elements 34 , 36 correspond on the sign and which can be reversibly connected and detached again.
In particular embodiments, the connection between the screen 30th and mask 40 or mouth-nose protection 10 not reversible but permanent.
In a further embodiment, fastening elements are located on the side (see 2a and 2 B combined with fastening elements that sit in the center at the front (see 3a , 3b and 3c ). This results in increased stability and resilience of the coupling of the shield 30th .
In addition, the protective shield can also be supported in the upper head area, for example by coupling it to glasses or by means of a forehead rest. This serves in particular to stabilize the upper shield area in the event that there is on the shield 30th a lamp, camera or other accessory is to be connected.

3a shows another way of attaching the shield 30th , now on a mechanically more stable breathing mask 40 with flanged replaceable filter element 41 . The mouth nose mask part 46 is preferably individually shaped to fit closely. The holding force on the head positions the mask securely around the mouth and nose in order to achieve the required tightness. The one through the filter 41 escaping air can reach the patient, but is filtered. It is attached to the head using the holding points 44 .
3b and 3c show the mask 40 from above and the one on the mask 40 fortified shield 30th . Here again with an arched curvature. You can see how the inhaled air is guided through a breakthrough 37 through into the mouth and nose and, if necessary, back out through the filter. There is also a pressure relief valve 49 , please refer 3c , through which the air can escape when coughing etc. This escaping air flow 9 gets from the shield 30th distracted and unable to reach the patient directly. Valves or additional filter paths can also be provided for exhalation, in which case the exhaled air is deflected from the shield, similar to FIG 2 B .

4th : Shield attached to mouth-nose protection with an internal replaceable filter
4a shows a side view of a further embodiment of the shield in combination with another embodiment of a mouth and nose protection 10 . 4b shows the constellation and the airway from above. The shield 30th is curved here predominantly in only one spatial direction, so it predominantly has the shape of a cylinder jacket section. The cylinder curvature of the shield results from the interaction of several breakpoints 34 on the side above, 36 on the side below and 38 in the middle in front. These correspond to the coupling elements 14th , 16 on the mask 10 . The optional spacers on the right, left and front create the distance between the shield and the mask and face. The airway does not pass through the shield here, the breakthrough 37 in the shield does not exist. The mask includes changeable filters 19th and a permeable filter cover 18th . The sealing edge can have a circumferential sealing lip or foam elements or be adaptable. The filter 18th , 19th lies on the side of the mouth relative to the shield. This means that both the flow of inhaled air and the flow of the air through these filter elements are guided by the shield 19th and the cover 18th escaping air 9 . The coupling of the screen 30th takes place via coupling elements, which are preferably in the mechanically more stable area of the mask 10 which has the function of a predominantly dimensionally stable three-dimensional frame 13th who can also have the cover 18th of the filter element 19th wearing. Here, too, different filter elements can be used depending on the requirements. This frame is held by the belt attachment 15th pulled back against the face and gives the mask stability relative to the head. The shield 30th is either bowl-shaped or cylindrical and on the mask or mouth-nose protection 10 attached.

5 : Shield clamped to the frame and lamp
5a shows a schematically sketched protective shield 30th with predominantly sole attachment not to the mouth nose protection but to a glasses frame 50 , e.g. magnifying glasses, preferably in the area between the eyebrows. The magnifying glass 51 is in this embodiment on the lenses or on the frame 52 attached. The transparent protective shield 30th made of material 31 has a side edge 32 and can have rectangular or rounded contours, have beveled flat areas and have cylindrical or ellipsoidal curvatures. For stabilization, the shield is first attached in the middle above the nose on the temple of the glasses 53 and on the side of the ear pieces, preferably the glasses pieces 53 through holes 37 in the shield 30th be plugged, or by fastening elements 57 the shield on the side fastening points on the temple 37 keep. The magnifying glass 51 requires a spacing of the shield 30th to the front, preferably through spacer elements 60 is achieved. According to the invention, the fastening element that has the shield 30th clamped, at least a first clamping element 73 and a second clamping element 62 . The spacer 60 is also self-retaining attached to the glasses frame 52 , with the clamping elements here 57 and 61 cooperate. They are preferably magnetically acting clamping elements. The length of the spacer 60 depends on the space requirements of the magnifier optics 51 .
5b shows the arrangement of the elements on the magnetic clamp with spacer 60 in enlarged detail. The first clamping element 73 generates the clamping force together with the second clamping element 62 . The spacer holds over the clamping elements 61 , 58 on the frame 52 the glasses 50 .
5c shows the constellation of the shield with a magnifying groove with a lamp from above. There can also be several auxiliary devices such as lights 70 or cameras can be arranged
5d shows a perspective view of a protective shield with attachment to magnifying glasses via clamping elements and spacer 60 . The attachment of the lamp 70 is optional, the lamp can be replaced by an end piece (not shown). The protective shield 30th can also be attached to the mouth and nose protection (not shown).
5e shows schematically a rotationally stable clamp fastening with two parallel magnetic clamping elements each 58 in the clamp on the lens side 56 . Likewise, two magnetic clamping elements 62 in the spacer 60 and also an end cap 80 with clamping elements 82 to get the clamping force for the shield 30th to unfold. The end piece 80 can be through a light or camera 70 be replaced, with clamping element 72 , 73 .

6th : Visor magnet clamp for lamp / camera
6a shows the clamping device with clamping cap 80 and clamping elements 82 , 73 for clamping accessories such as lights 70 or cameras. It is clamped directly to the shield by means of static friction and / or mechanical encryption 30th . This enables such accessories to be attached without a glasses frame (cf. 5a) . The attached equipment 70 , in the example a micro LED battery light, is very light and can be removed if necessary. The weight is preferably between 5 and 50 grams, for versions without a battery with an external energy source between 5 and 20 grams and for versions with an integrated battery between 10 and 30 grams 70 via the first clamping element 72 , 73 and a second clamping element 80 , 82 clamped. The film or disk 31 of the protective shield 30th is so thin or perforated in the clamping area that the clamping effect is largely sufficient for the stable fixation of the protective shield.

With modern magnetic elements 82 and 73 , which can be cylinder magnets with the same orientation, forces are achieved so that foils up to 1 mm thick can also be clamped. The smaller the gap between the clamping elements that is filled by the screen 82 , 73 is, the greater the clamping force for the same magnets. Supportive and for better orientation of the sign 30th can on the devices or elements 70 , 60 , 80 , 50 further orientation elements can be attached, which encode with orientation elements on the protective shield.
6b shows an attachment of an LED light 70 on the shield 30th with the help of the clamping device 72 , 73 , 82 , 80 . In addition, a support part 85 be attached, in particular to support the lamp on the forehead.

7th : Sign with coupling elements for attachment to a head-mounted device
7a shows a protective shield 30th made of preferably transparent material 31 and with fasteners 37 In the form of a hole for passing through the temples on the right and left as well as with other fastening elements 34 , 36 for coupling to a mouth-nose protection or to a breathing mask with coupling elements 14th , 16 Is provided. In the middle at the top you can see an opening for strongly clamping magnet holders or other fastening elements for clamping the shield to a spectacle frame with the help of a spacer.
7b shows a preferred embodiment of the protective shield 30th without glasses attachment with attachment via the coupling elements 34 , 36 on a mask (not shown), which is equipped with corresponding elements for it. To the Attachment, plug-in elements, magnetic elements, Velcro elements and or other coupling elements can be used.
7c shows a sign 30th with coupling elements in the upper area that are prepared for coupling to glasses, without additional coupling to a mask. The particularly preferred embodiment comprises at least one fastening element 37 right and left for contact with the ear hooks 53 . In addition, at least one centrally attached coupling element 56 for attaching a counter-clamping element 60 or 80 or 70 so that the disk of the protective shield is clamped at this point. Furthermore, holding elements can be attached with holding elements 57 correspond on the temples (not shown. See 5a)

The mechanical stability of the shield 30th at the clamping point is achieved by an at least one-dimensional curvature. Depending on the application, one-dimensional curved shields such as 4th and 5 or two-dimensionally curved shields like us 2 and 3 as 6b .

List of reference symbols

1

Head, skull of the wearer

2

Eye, eye area

3

ear

4th

nose

5

mouth

6th

chin

7th

Breathing air flowing in

8th

Breathing air flowing out directly

9

Breathing air flowing out distractedly

10

Mouth nose protection or breathing mask

11

Filter mat, textile or foam

12th

Fold to adjust the shape

13th

Sealing area, surrounding area

14th

Coupling element on the mask

15th

Pull or strap element to attach the mask to the head

16

Coupling element on the mask

17th

mechanically stable frame for clamping the filter

18th

Filter air grille

19th

Filter insert

20th

State-of-the-art eye protection

21

Eye protection disc

22nd

Forehead protection

23

Coupling seam on mouth nose protection

30th

Face shield

31

Front shield or material of the protective shield

32

Margin

34

Coupling counter element to 14 on the sign

35

Opening through the shield for the clamping element, optional

36

Coupling counter element to 16 on the sign

37

Flange hole for filter attachment 47 , form-fitting position and orientation

38

Coupling element in the center at the front

40

Respirator with filter

41

Filter element

43

Face-adapted mouth nose mask

44

Tension anchorage for head mount

45

stable pulling bracket for head mounting

46

Individually matching mask shape

47

Flange or neck or thread for filter element 41 , matches 37

49

Pressure relief valve, especially for blowing out when coughing

50

Glasses or loupes

51

Magnifying optics

52

Glasses and glass frame

53

Eyeglass temples, robust

54

Eyeglass temple ear rest

55

Nose pad of the glasses

56

Magnetic holder on the lens side

57

Coupling for the ear hook of the glasses

58

Magnetic element

60

Spacer

61

Magnetic element in the direction of glasses

62

Magnetic element in the direction of the shield

70

Light or alternatively a camera

71

electronics

72

Positioning element

73

Magnetic element

74

Light source

75

power supply

76

Information or energy connection

80

Retaining element or auxiliary element

82

Magnetic element in the direction of the shield

85

Support element

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• US 4944294 [0002]
• WO 8910106 [0003]
• EP 1045651 B1 [0004]
• EP 0957993 B1 [0005]

Claims (14)

Shield (30) for protecting the face of a human wearer from contamination, in particular for protecting the mouth, nose and eyes, the shield (30) having fastening means (34, 36) for fastening to at least one first aid (10) , which can be fastened to the head (1) of the wearer, wherein the first auxiliary means (10) can be arranged between the head (1) of the wearer and the shield (10), and wherein the shield (30) has a size so that the shield (30) attached to the first device (10) can extend over the face of the wearer wearing the first device (10). Shield (30) Claim 1 wherein the shield (30) is sized so that the shield (30) can extend over the entire face of the wearer and / or that the shield (30) extends over the entire face and below the chin of the outer contour of the head following in the direction of the neck approximately of the wearer and / or that the shield (30) can extend over the entire face beyond the outer contour of the head over at least part of the forehead of the wearer. Shield (30) Claim 1 or 2 wherein the shield (30) has a one-dimensional or two-dimensional curvature and / or the shape of a cylinder segment and / or is made in one piece. Shield (30) according to one of the preceding claims, wherein the shield (30) has a thickness of 0.10 mm to 0.8 mm, particularly preferably between 0.20 mm and 0.50 mm and / or the shield (30 ) Comprises polycarbonate or an acetate film and / or the shield (30) is impermeable to liquids and / or the shield (30) has a weight between 4 and 60 grams, preferably between 10 and 30 grams. Shield (30) according to one of the preceding claims, wherein the shield (30) is dimensionally stable under its own weight or wherein the shield adapts to a flat support surface under its own weight and / or the shield (30) has a deep-drawn film, the deep-drawn film determines a basic shape of the shield (30) and / or the shield (30) has at least one transparent section, wherein the transparent section is arranged in particular in the field of vision and / or the shield (30) has an anti-reflective coating and / or an anti-fogging layer which is arranged in each case on the side facing the carrier. Shield (30) according to one of the preceding claims, wherein the fastening means (34, 36) have coupling counterparts (34, 36) which are connected to coupling elements (14, 16), in particular with coupling elements (14, 16) of a mask (10). or a filter of a mask (10) can be connected, in particular can be connected reversibly and / or the fastening means has at least one recess (37) through which a filter and / or a magnetic connection can extend and / or. Shield (30) according to one of the preceding claims, wherein the first aid comprises a mask (10), preferably a breathing mask, a glasses frame and / or a cap, in particular a baseball cap. Sign (30) according to one of the preceding claims, wherein second aids, in particular a camera and / or a lamp, can be attached to the sign (30) by means of further fastening means and / or the further fastening means have at least one recess. Use of a shield (30) to protect the face of a wearer from contamination, in particular to protect the mouth, nose and eyes, for attachment to at least one first aid (10). Having a mask (10) for protecting the mouth and nose area of a human wearer from contamination - Retaining elements for attaching the mask (10) to the head of the wearer, and - Coupling elements (14, 16) for connection to fastening means of the shield (10) and / or having retaining elements, in particular retaining straps, which can be connected to coupling counterparts (34, 36) of the shield (30), and / or having a seal which is arranged between the mask and the face of the wearer. Shield arrangement, comprising - a shield (30) according to one of the Claims 1 - 9 , and - a mask (10) according to Claim 10 - The shield (30) and the mask (10) can be connected to one another. Shield arrangement according to Claim 11 , wherein the shield (30) and the mask (10) can be connected to one another by means of the coupling elements (14, 16) and the holding elements and / or the mask (10) and the shield (30) can be positively or cohesively connected. Shield arrangement according to one of the Claims 11 or 12th , wherein the mask (10) is arranged between the shield (10) and the face of the wearer and / or the shield (30) is attached to an air filter (41) of the mask (10) and / or the shield (30) can be fastened to the air filter by means of a clamping arrangement and / or the shield (30) is arranged at a distance from the mask (10), so that air can circulate between the mask (10) and the shield (30) and / or the fastening means at least one Have spacer (38) by means of which the shield (30) and the mask (10) can be connected to one another, the spacer (30) defining a distance between the shield (30) and the mask (10). Shield arrangement according to one of the Claims 11 - 13th wherein the inside of the shield (30) is spaced apart from the outside of the mask (10) facing the inside of the shield (30) in a large part of an overlapping area of the mask (10) and the shield (30).

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