EP3106759B1 - Suspension system for attaching an extractor hood - Google Patents

Description

The present invention relates to a suspension system for securing an extractor hood in a piece of furniture.

From the EP 2 808 614 A2 describes a system and a method for assembling a base unit extractor hood. Here, sheet metal parts are attached to the wall of the room with a protrusion below the kitchen cabinet.

To attach extractor hoods, especially in furniture, such as wall units in kitchen units, it is known to provide a fastening device on the extractor hood which comprises a sheet metal prestressed by a spring that protrudes from the sides of the extractor hood. In this case, the sheet metal is attached to the hood at its upper edge and the lower end of the sheet protrudes outward over the side of the hood. Such a fastening device is for example in DE 90 16 933 U1 disclosed. In addition, brackets can be attached to the inside of the walls of the cabinet, which are directed into the interior of the cabinet and provide a support surface for the lower edge of the sheet metal. If the extractor hood is pushed into the wall cabinet from below, the bracket hits the sheet metal and pushes it back. If the holder is moved past the sheet, the sheet is pulled back into the starting position. The flat screen hood can now be lowered and hangs over the bracket and sheet in the wall cabinet, in particular the lower edge of the sheet rests on the support surface of the bracket. The sheet metal can be reset manually with an additional screw so that the flat screen hood can be removed again. Fastening devices are also known in which a pin, in particular a metal pin, is used on the holder and is perpendicular to the holder. Different cabinet wall thicknesses can be compensated for by the length of the pin.

Furthermore, in the EP 0 058 220 A1 , DE 20 2007 015 212 U1 and U.S. 4,186,976 A Fastening devices for fastening furniture parts together described.

A disadvantage of known fastening devices for extractor hoods is that the vertical position of the extractor hood is not set exactly when it is inserted. For example, in the case of an extractor hood that is a flat screen hood, the screen or the drawer of the extractor hood or a rail for the screen, which should rest against the lower edge of the cabinet, is offset downwards to the lower edge of the cabinet and so forms a gap. In order to eliminate this gap, it is known to provide adjustment devices on the extractor hood and in particular on the fastening device. The adjustment is made with a screwdriver and can be very time consuming.

The object of the present invention is thus to create a solution by means of which an extractor hood can be easily and reliably brought into and held in a desired position in a piece of furniture, in particular a wall cabinet.

The invention is based on the knowledge that this object can be achieved by using a fastening device with a swivel arm with a suitable geometry and suitable arrangement.

The object is achieved by the features of claim 1.
According to the invention, the fastening device is understood to be the part of a suspension system which is provided on the extractor hood and can interact with a geometry on the cabinet wall. In particular, a device is referred to as a fastening device for an extractor hood, by means of which the extractor hood can be releasably fastened to a cabinet wall or a wall bracket provided thereon. A fastening that can be released without tools or with little tool effort is referred to as a releasable fastening. The fastening device is particularly preferably a device which allows the extractor hood to be pre-fixed in the furniture without tools. A flat screen hood in particular is referred to as an extractor hood. The furniture is also referred to below as a cupboard, wall cupboard or wall cupboard.

According to the invention, the fastening device has a housing, at least one swivel arm and at least one compression spring. The housing and the swivel arm are preferably plastic components. The housing is used in particular to hold the swivel arm and to attach it to the extractor hood, in particular to the extractor housing of the extractor hood. The housing is preferably open towards its front side. A component that can be moved around a pivot axis is referred to as a swivel arm. The pivoting movement of the pivot arm is preferably limited by latching arms which engage the housing with a counter geometry. According to the invention, the swivel arm is held on the housing and is mounted pivotably about a swivel axis with respect to the housing. The pivot axis, which is also referred to as the axis of rotation, is preferably in or above the top of the housing. The pivot axis is particularly preferably in the front area and in particular in the front of the housing. In the case of a fastening device mounted on an extractor hood, the pivot axis is horizontal. This enables the pivot arm to be pivoted into and out of the housing. The compression spring is preferably a helical spring which has a longitudinal extension.

According to the invention, the swivel arm has a locking lug, which is also referred to as a swivel lug. A preferably rounded projection or tip on the swivel arm, which is used to engage a holder on the cabinet wall, is referred to as a latching lug. The locking lug is aligned so that it faces away from the housing of the fastening device.

According to the invention, the compression spring is arranged in such a way that it engages the inside of the swivel arm in the area of the latching lug and is offset downward relative to the swivel axis. The side facing the housing is referred to as the inside of the swivel arm. In the area of the locking lug, the inside is preferably designed as a bulge and follows the outer contour of the locking lug. A compression spring is referred to as being offset downwards in relation to the pivot axis, which when the fastening device is installed on the extractor hood is at a lower height than the pivot axis. In addition, the compression spring is perpendicular to the pivot axis. Thus, the compression spring can exert a force on the swivel arm which leads to the swivel arm swiveling about the swivel axis. Particularly preferred the pivot axis lies parallel to or in the front edge of the housing. The compression spring preferably extends horizontally in the depth direction of the housing and is at least partially received therein.

A number of advantages can be achieved by providing a swivel arm according to the invention on a housing which is movably attached to the housing about a swivel axis and also engages a compression spring in the area of the locking lug of the swivel arm, which is perpendicular to the swivel axis and below the swivel axis . On the one hand, the swivel arm can be swiveled out of the housing by the compression spring, at least with its latching lug. In this way, the fastening device can be held on a bracket or on a part of the cabinet wall. Since the compression spring, by which the swivel arm is swiveled out or pushed out, engages the swivel arm in the area of the locking lug, the force component that is directed outwards and is therefore responsible for engaging a bracket or the cabinet wall is particularly large and can can also be specifically adjusted. The direction of the compression spring is also perpendicular to the insertion direction in which an extractor hood with a fastening device mounted on it is inserted from below into a cabinet. Thus, the compressive force of the compression spring only slightly hinders the insertion of the extractor hood. With the present invention it is therefore possible in a simple and reliable way to bring and hold an extractor hood in a desired position, in particular in a wall cabinet.

According to the invention, the swivel arm has an underside which describes an arc of a circle whose distance from the vertical to the swivel axis steadily decreases from below in the direction of the locking lug of the swivel arm. The underside of the swivel arm is the end of the swivel arm that is opposite the swivel axis. In the assembled state of the fastening device on the extractor hood, this end points downwards. The underside describes an arc of a circle, i.e. it has a geometry that runs around a center point. The distance between the arc and the pivot axis decreases steadily from the vertical from below in the direction of the locking lug of the pivot arm. The distance to the pivot axis is thus smallest at the locking lug. By decreasing the distance between the arc and the pivot axis, a geometry is created through which the Fastening device and thus the extractor hood to which the fastening device is attached, can be pulled up in a cabinet.

The difference between the distance from the lower end of the swivel arm, i.e. the radius around the swivel axis lying in the vertical position in the assembled state, to the radius of the geometry of the circular arc around the swivel axis on the locking lug determines the amount by which the fastening device closes the extractor hood Can lift the cabinet upwards. Since the compression spring engages the swivel arm in the area of the latching lug and thus pushes it outwards, when the fastening device is inserted into the cabinet, the swivel arm with the circular arc geometry on its underside rests against a wall bracket and the circular arc starts when the pressure spring is pivoted along the wall bracket. The extractor hood is pulled upwards due to the increasing distance during this movement when the pivot arm on the underside is pivoted to that of the pivot axis.

With this embodiment, the advantage can be achieved that the extractor hood, which is attached to a cabinet via such a fastening device, can adjust itself and in particular the extractor hood is pulled up. As a result, the occurrence of a gap between the lower edge of the cabinet and an underside of the extractor hood or the upper edge of a drawer or a rail profile of the drawer can be closed, thereby preventing contamination that could otherwise settle in the gap. In addition, the fact that the extractor hood is adjusted by the fastening device itself simplifies the fastening of the extractor hood. In particular, the attachment, that is, the installation of the extractor hood in the cabinet, can be carried out by a single person, since it is not necessary to hold the extractor hood for adjustment.

The geometry of the swivel arm, in particular the underside of the swivel arm, is designed to be as steep as possible so that greater height compensation can be compensated for if the brackets are incorrectly installed on the cabinet. On the other hand, the geometry is designed as flat as possible in order to ensure that the extractor hood is held securely in the wall cabinet. In addition, the depth of the swivel arm, that is, its extension in the width direction of the The extractor hood is dimensioned in the installed state so that the depth of the fastening device can be kept small and preferably corresponds to the distance between an outer wall of the extractor housing and an inner wall of the extractor housing or at least does not exceed this distance.

According to a preferred embodiment, the circular arc has a radius in the range from 28mm to 32mm to the center of the circular arc and the center of the circular arc is offset from the pivot axis of the pivot arm, which can also be referred to as the pivot point or axis of rotation. The difference between the radius of the circular arc and the same radius around the pivot axis in the area of the locking lug is preferably at least 2 mm, particularly preferably 4 mm to 6 mm and more preferably 5 mm. The angle by which the locking lug is inclined from the vertical is preferably selected in the range from 50 ° to 60 °, preferably 55 °. This ensures a depth of the pivot arm that is small enough to be accommodated in the housing of the fastening device and yet the depth of the fastening device is small enough to be accommodated in particular at a distance between the outer wall and inner wall of the extractor housing.

As already mentioned, the height compensation takes place via the geometry of the swivel arm, that is to say in particular via the circular arc on the underside of the swivel arm. In the preferred embodiment, the swivel arm, at the point at which it rests on the wall bracket, has a radius of 28 mm-32 mm, preferably 30 mm. Because the center point of the radius is offset from the pivot axis, that is, it is not congruent with the pivot axis of the pivot arm, the desired height compensation can be achieved. If the pivot axis and the center point of the radius of the arc were congruent, no height compensation would be possible, since the distance between the pivot axis and the arc would always be the same. In order to achieve height compensation, according to the invention, the distance from the axis of rotation to the radius of the circular arc preferably increases steadily downwards from the locking lug. The center position of the radius of the circular arc of the swivel arm results from the maximum distance between the two radii (radius around the swivel axis to the radius of the circular arc) and a radial value of the circular arc, which can be set at 30mm, for example. The maximum distance between the radii is for example set at 5mm. This means that the maximum height compensation is 5mm. If the distance is larger, the extractor hood can no longer be held securely in the wall cabinet, as the static friction between the swivel arm and the wall bracket is no longer sufficient to hold the extractor hood. A short distance increases the safety of holding the extractor hood in the wall cabinet, but at the same time the possible height compensation is reduced.

According to a preferred embodiment, the force of the compression spring is adjustable. Particularly preferably, there is an increase in the compressive force that can be applied by the compression spring. The adjustment of the force of the compression spring is preferably carried out by shortening or lengthening the length of the compression spring, in particular by compressing or relaxing the compression spring. According to a preferred embodiment, the force of the compression spring can be set to two values of the compression force.

The ability to adjust the compressive force of the compression spring has the advantage that the force can be adapted to current requirements. Thus, for example, the pressure force can be set to be lower while the extractor hood and thus the fastening device mounted on it are being brought into the cabinet. Since the compression spring engages on the inside of the locking lug and pushes the swivel arm out of the housing, i.e. outwards, setting a lower pressure force while inserting the extractor hood is advantageous, as the force that the fitter needs to bring in the Cooker hood has to spend is reduced. However, since the pressure force is adjustable and, in particular, can be increased, it is possible to increase the pressure force when the extractor hood is in the cabinet and thereby improve the hold of the extractor hood and in particular the fastening device on the cabinet. In addition, the adjustment of the extractor hood can be supported by increasing the pressure.

According to a preferred embodiment, the fastening device therefore comprises a spring holder which is movable with respect to the housing and which supports the compression spring at least in the axial and preferably also in the radial direction. The pen holder is for this preferably hollow or at least at one end has a recess which extends over part of the length of the spring holder and into which the compression spring can be inserted. The compression spring is preferably placed loosely in the recess. Alternatively, the compression spring can also be firmly connected to the spring holder. The compression spring can be connected to the spring holder, for example, by gluing or by a receiving element. The pen holder is preferably a plastic component.

According to one embodiment, the spring holder has a base body which has a tubular shape or a sleeve shape which has a contact surface for the compression spring at one end and is therefore at least partially closed at this end. The contact surface can be created by a head which closes the main body of the spring holder at one longitudinal end at least in some areas. The spring holder is movable with respect to the housing. In particular, the spring holder can be moved in its longitudinal direction and thus in the longitudinal direction of the compression spring. By moving the spring holder, the compressive force of the spring can be adjusted.

This embodiment, in which a movably held spring holder is provided on the housing, has the advantage over embodiments in which the compression spring rests directly on the rear wall of the housing, for example, that the compressive force can be adjusted in a simple manner. Since the spring holder also supports the compression spring at least in the axial direction and preferably also in the radial direction, buckling of the compression spring when the compression spring is compressed can be prevented. In addition, the compression spring is guided or held by the spring holder. Furthermore, the spring holder is designed in such a way that on the one hand it can prevent the extractor hood from falling and on the other hand it is possible to dismantle the extractor hood, that is, to remove the extractor hood from the cabinet.

According to a preferred embodiment, the housing has a passage opening in the rear wall for access to the compression spring. The force of the compression spring can thus be adjusted through the passage opening. In a preferred embodiment, a spring holder is guided through the passage opening. The advantage that results from the provision of a passage opening in the rear wall is that this after the Mounting of the fastening device in the extractor hood is accessible from the inside of the extractor hood and thus the setting of the pressure force during or after the introduction of the extractor hood into the cabinet is possible.

According to a preferred embodiment, the swivel arm has a fixing projection on its rear side for engagement with a fixing device of the fastening device, preferably a fixing device on the spring holder. A projection on the pivot arm that is formed in the direction of the housing is referred to as a fixing projection. The at least one fixing projection is preferably provided in the vicinity of the point of application of the compression spring. The fixing projection is therefore preferably in the width of the swivel arm and more preferably in the area of the latching lug. Furthermore, a fixing device is preferably provided on the fastening device, which can engage with the fixing projection, that is to say can interact. The engagement of the fixing device with the fixing projection preferably blocks a movement of the swivel arm. In particular, the swivel arm cannot be swiveled further in the direction of the housing. In this way, the swivel arm and in particular the locking lug can be prevented from being drawn in or pushed in, which would break the hold of the extractor hood. Another advantage of providing a fixing device and a fixing projection is that the compressive force of the compression spring can be selected to be lower, since holding the fastening device and thus the extractor hood in an end position is supported or ensured by the engagement of the fixing device with the fixing projection.

The fixing device is particularly preferably provided or formed on the spring holder. This embodiment is advantageous because the spring holder is designed to be movable relative to the housing and so the fixing device can only be brought into engagement with the fixing projection at the desired point in time, especially when the extractor hood is in its end position in the cabinet, while the The extractor hood in the cabinet does not engage the fixing device with the fixing projection and so does not hinder the movement of the swivel arm. The fixing device on the spring holder can in particular represent the open longitudinal end of a tubular or sleeve-shaped spring holder. The compression spring is inserted into the spring holder via this longitudinal end. One near the point of attack of the The fixing projection provided on the swivel arm can therefore be brought into engagement in a simple manner by bringing the longitudinal end of the spring holder closer to the swivel arm. The fixing projection is preferably at least partially inserted into the interior of the spring holder. The fixing projection preferably has a trapezoidal shape, the smaller height or width of the fixing projection facing away from the locking lug. Thus, the insertion and centering of the fixing projection in the fixing device, in particular in the open longitudinal end of the spring holder, can be supported.

According to a preferred embodiment, the spring holder has a base body with an interior space for receiving a compression spring and has a connection geometry, in particular at least one bayonet projection or an external thread, on the outside of the base body. With this configuration, the spring holder can, on the one hand, enable the above-mentioned functions, in particular supporting the spring in the axial and radial directions and, if necessary, engaging with a fixing projection. On the other hand, the connection geometry on the outside allows the position of the spring holder to be determined relative to the housing of the fastening device. In particular, the spring holder can be inserted and held by different amounts via a passage opening in the rear of the housing. In a first relative position, the spring holder can, for example, be pushed so far into the housing that the force that is thereby exerted on the compression spring is sufficient to prevent the detent from retracting into the housing. In a second relative position in which the spring holder is inserted further into the housing, the compression spring can be compressed to such an extent that its compressive force is sufficient to ensure that the extractor hood is held in the cabinet. If a fixing projection is provided on the swivel arm, the spring holder, in the second relative position, preferably engages with the fixing projection with the open longitudinal end, which serves as a fixing device.

According to one embodiment, the connection geometry preferably has a plurality of bayonet projections. These extend radially outward from the outside of the spring holder and in particular from the tubular base body of the spring holder. Preferably, two bayonet projections are provided at one axial position of the spring holder at radially opposite points and at one axially offset second axial position, two further bayonet projections are provided at radially opposite points. The bayonet projections at the first and the second axial position are arranged radially offset from one another and are preferably perpendicular to one another. The position of the spring holder in the fastening device can be changed via the bayonet projections, two of which can be referred to as bayonet locks.

According to the invention, essentially two different positions of the spring holder are required in the fastening device. When installing the extractor hood, the first bayonet lock of the spring holder is locked to the housing of the fastening device. In order to secure the extractor hood in the installed state, the spring holder must be pushed in and connected to the housing of the fastening device at the second bayonet lock. In order to be able to dismantle the extractor hood, the bayonet lock must be completely opened and the spring removed. The turning is done either manually or with a tool. For turning with a tool, the spring holder can be designed so that it can be screwed in with a slotted screwdriver.

With this embodiment, the spring holder can be held on the housing in a simple manner in different positions relative to the housing. For this purpose, two radially opposite bulges are preferably provided on a passage opening in the rear of the housing, through which the bayonet projections can be guided.

According to a further embodiment, an external thread on the spring holder and in particular on its base body is provided as the connecting geometry. In this embodiment, an internal thread for engagement with the external thread is introduced at the passage opening in the rear of the housing. In this embodiment of the connection geometry, the spring holder can be inserted further into the housing or moved out of it by turning. In this embodiment, too, the spring holder can be held in different positions relative to the housing. Since this hold is created by the thread, the different relative positions can be adjusted continuously.

The invention relates to a suspension system for attaching an extractor hood in a piece of furniture. The suspension system has at least one fastening device according to the invention on an extractor hood according to the invention and at least one wall bracket for fastening to the wall of the furniture.

The wall of the furniture is preferably the side wall of a wall cabinet. A component which is present separately from the fastening device and the cabinet and which can be fastened to the wall, in particular to the inside of the side wall of a wall cabinet, is referred to as a wall bracket. This attachment can be done for example by screwing. The wall bracket preferably has at least one support surface for part of the swivel arm of the fastening device. According to the invention, the support surface is inclined upwards from the horizontal. This bearing surface is particularly preferably formed on a bracket geometry in the wall bracket that represents a projection, in particular a V-shaped projection. The support surface is formed here by the upper leg of the projection.

By providing a separate wall bracket, an extractor hood can also be installed in a cabinet that does not have a floor. In addition, the bracket geometry of the wall bracket can be designed in such a way that it works particularly well with the fastening device. In particular, the inclination of the support surface can be adapted to the radius of the circular arc on the underside of the swivel arm.

The fastening device is preferably arranged between an outer wall and an inner wall of the extractor housing. On the one hand, this position of the fastening device ensures that at least part of the pivot arm of the fastening device for holding the extractor hood protrudes. On the other hand, this position can also protect the fastening device from contamination by the inner wall. In addition, the cleaning of the extractor hood is simplified with this preferred positioning of the fastening device, since it is not the housing of the fastening device but rather the inner wall of the extractor housing on the Inside lies. The inner wall forms an essentially smooth inside of the extractor hood and can therefore be cleaned easily. Finally, this positioning of the fastening device is advantageous because the inclusion between the inner wall and the outer wall of the outer geometry of the housing of the fastening device means that there are no special requirements for cleaning and this is therefore designed in accordance with the requirements for holding the swivel arm and possibly a spring holder can.

A mounting opening for the passage of at least the pivot arm of the fastening device from the inside is preferably provided in the outer wall of the extractor housing. The fastening device here preferably has insertion feet by means of which the fastening device can be held on the outer wall. In addition, the fastening device is preferably screwed to the outer wall or otherwise fixed in such a way that the housing of the fastening device is prevented from moving with respect to the outer wall.

According to a preferred embodiment, a passage opening for access to at least part of the fastening device is made in the inner wall of the extractor housing. Particularly preferably, the passage opening in the inner wall of the extractor housing is aligned with the passage opening in the rear wall of the housing of the fastening device. This makes it possible, for example, to access a spring holder, which is held at the passage opening in the rear of the housing of the fastening device, and to change the position of the spring holder relative to the housing of the fastening device. Thus, even after the fastening device has been installed in the extractor hood, it is possible to change the pressure force of the compression spring and / or to bring a fixing device on the spring holder into engagement with a fixing projection on the swivel arm. The passage opening in the inner wall of the extractor housing can be closed by a cover cap, which can for example be inserted into the passage opening, after the extractor hood has been installed in the cabinet.

According to the invention, the extractor hood is preferably a flat screen hood. In the case of a flat screen hood, a drawer, which can also be referred to as a screen, is displaceable relative to the extractor hood housing. The cooker hood housing is recorded in a top cabinet, while the drawer and rail profiles for the drawer, which are connected to the extractor housing at the bottom, are below the lower edge of the cabinet to enable the drawer to be pulled out. The exact positioning of the extractor housing in the cabinet is therefore particularly important in the case of a flat screen hood. With the fastening device used according to the invention, this positioning can be ensured in a simple manner and a gap between the underside of the cabinet and the lower edge of the extractor housing or the upper edge of the drawer or a rail profile can be avoided.

Advantages and features that are described with regard to the fastening device used according to the invention apply - if applicable - correspondingly to the suspension system according to the invention and the inventive extractor hood and vice versa and are therefore mentioned only once if necessary.

Figur 1:

eine schematische Perspektivansicht einer Ausführungsform der erfindungsgemäß verwendeten Befestigungsvorrichtung während der Montage;

Figur 2:

eine schematische perspektivische Seitenschnittansicht der Ausführungsform der Befestigungsvorrichtung nach Figur 1 mit Feder und Federhalter;

Figur 3:

eine schematische perspektivische Seitenschnittansicht der Ausführungsform der Befestigungsvorrichtung nach Figur 1 mit Feder;

Figur 4:

eine schematische Perspektivansicht auf eine Befestigungsvorrichtung an einem Dunstabzugsgehäuse von außen;

Figur 5:

eine schematische Perspektivansicht auf eine Befestigungsvorrichtung an einem Dunstabzugsgehäuse von innen;

Figur 6:

eine schematische Innenansicht einer Dunstabzugshaube mit montierter Befestigungsvorrichtung;

Figur 7:

eine schematische Darstellung einer Dunstabzugshaube beim Einbau in einen Schrank;

Figuren 8 - 10:

Detailansichten der Befestigungsvorrichtung aus Figur 7 in unterschiedlichen Zuständen;

Figur 11:

eine schematische perspektivische Rückansicht einer Ausführungsform der erfindungsgemäß verwendeten Befestigungsvorrichtung mit Federhalter;

Figur 12:

eine schematische Schnittansicht einer Ausführungsform der erfindungsgemäß verwendeten Befestigungsvorrichtung im fixierten Zustand;

Figur 13:

eine schematische Darstellung einer weiteren Ausführungsform eines Federhalters der erfindungsgemäß verwendeten Befestigungsvorrichtung;

Figur 14:

eine schematische perspektivische Rückansicht einer Ausführungsform der erfindungsgemäß verwendeten Befestigungsvorrichtung mit Federhalter nach Figur 13; und

Figur 15:

eine schematische Darstellung der Ermittlung der Geometrie einer Ausführungsform des erfindungsgemäß verwendeten Schwenkarms.

The invention is described again below with reference to the accompanying drawings. Show it:

Figure 1:

a schematic perspective view of an embodiment of the fastening device used according to the invention during assembly;

Figure 2:

a schematic perspective sectional side view of the embodiment of the fastening device according to FIG Figure 1 with pen and pen holder;

Figure 3:

a schematic perspective sectional side view of the embodiment of the fastening device according to FIG Figure 1 with feather;

Figure 4:

a schematic perspective view of a fastening device on an extractor housing from the outside;

Figure 5:

a schematic perspective view of a fastening device on an extractor housing from the inside;

Figure 6:

a schematic interior view of an extractor hood with a mounted fastening device;

Figure 7:

a schematic representation of an extractor hood when installed in a cabinet;

Figures 8-10:

Detailed views of the fastening device Figure 7 in different states;

Figure 11:

a schematic perspective rear view of an embodiment of the inventive fastening device with spring holder;

Figure 12:

a schematic sectional view of an embodiment of the fastening device used according to the invention in the fixed state;

Figure 13:

a schematic representation of a further embodiment of a spring holder of the fastening device used according to the invention;

Figure 14:

a schematic perspective rear view of an embodiment of the fastening device used according to the invention with a spring holder Figure 13 ; and

Figure 15:

a schematic representation of the determination of the geometry of an embodiment of the pivot arm used according to the invention.

In Figure 1 a first embodiment of the fastening device 3 used according to the invention is shown in the open state. Here are of the Fastener 3 in Figure 1 only the housing 30 and the pivot arm 31 are shown.

When assembling the fastening device 3, the pivot arm 31 is first pushed into the housing 30 at the intended position. The housing 30 has a box shape and is open to the front. According to the invention, the front side of the housing 30 is the side which, in the assembled state of the fastening device 3 in an extractor hood 1, faces outwards, that is to say which faces away from the inside of the extractor housing of the extractor hood 1.

The swivel arm 31 is pushed into the housing 30 from the side. In particular, a rod which lies in the pivot axis D of the pivot arm 31 is pushed into an axis holder 303 from the side. In order to precisely define the insert, a stop 32 is provided on the rod, which lies in the pivot axis D of the pivot arm. The pivot axis D of the pivot arm 31 is also referred to as the axis of rotation D in the following.

The pivot arm 31 of the fastening device 3 is held about the pivot axis D, which runs along the front upper edge of the housing 30. In the embodiment shown, the pivot axis D is formed by the rod which has the stop 32 at one end in order to prevent the pivot arm 31 from slipping axially along the pivot axis D. For this purpose, an axle holder 303 is provided on the top of the housing 30 in the embodiment shown. However, it is also possible to hold the pivot axis D and in particular a rod running through it on the housing 30 in a different manner.

On the back of the swivel arm 31, two locking arms 311 are shown in the illustrated embodiment, which extend to the rear. After the pivot axis D has been attached to the housing 30, the pivot arm 31 is tilted about the axis of rotation D into the housing 30. Here, the two latching arms 311, which are also referred to as snap hooks, engage with a counter geometry 300 which is provided on the housing 30 and in particular on the inside of the housing 30. As a result of the latching, the swivel range of the swivel arm 31 is limited in the direction away from the housing 30.

How out Figure 3 results, the fastening device 3 used according to the invention comprises, in addition to the housing 30 and the pivot arm 31, a compression spring 33, which is also referred to as a spring 33. The compression spring 33 lies perpendicular to the axis of rotation D of the swivel arm 31 and extends in the depth direction of the housing 30, that is, in the direction between the front and the rear of the housing 30. The compression spring 33 is opened after the locking arms 311 with the counter geometry 300 are locked the rear of the housing through a through-opening 301 provided for this purpose. The compression spring 33 is pushed in until it rests on the pivot arm 31.

The pivot arm 31 has a latching lug 310 which, in the assembled state of the fastening device 3, points away from the housing 30. The compression spring 33 engages in the area of the latching lug 310 on the inside, that is to say on the side of the pivot arm 31 facing the housing 30. In the in Figure 3 For this purpose, a positioning projection 312 is provided which can represent a positioning cross around which the front end of the spring 33 engages.

The pivot arm 31 is thus held on the housing 30 so as to be movable about the pivot axis D and has a latching lug 310. The compression spring 33 is perpendicular to the pivot axis D and engages the inside of the pivot arm 31 in the area of the latching lug 310, offset downward relative to the pivot axis D.

As can be seen from the figures, the underside of the swivel arm 31 is formed by a geometry that describes an arc K. The distance between the circular arc K and the pivot axis D decreases steadily from the vertical from below in the direction of the locking lug 310 of the pivot arm 31. In addition, the center point of the circular arc K is offset from the axis of rotation D. The geometry of the pivot arm 31 will be discussed later with reference to FIG Figure 15 described in more detail.

In a preferred embodiment, the fastening device 3 has a spring holder 4 in addition to the housing 30, the pivot arm 31 and the compression spring 33. The spring holder 4 can after the introduction of the compression spring 33 in the housing 30 over the end of the spring 33 facing away from the latching lug 310 can be pushed and connected to the housing 30.

One embodiment of the spring holder 4 is shown in FIG Figure 2 shown. The spring holder 4 reaches through a passage opening 301 in the rear of the housing 30. The spring 33 is inserted into the spring holder 4 via the front open end of the base body 40 of the spring holder 4, which is designed as a sleeve or tube. A head 41 is provided on the rear side of the spring holder 4, which preferably represents a closed plate which has a larger diameter than the outer diameter of the base body 40 of the spring holder 4. As a result, the spring 33 can be supported in the spring holder 4 in the axial direction. In addition, this can prevent the spring holder 4 from slipping into the housing 30.

In the in Figure 2 In the state shown, the spring holder 4 is fixed in a first position relative to the housing 30. In the embodiment according to Figure 2 If the spring holder 4 has a connection geometry 401 on the outside of the base body 40, which is formed by four bayonet projections 4011, of which in FIG Figure 2 only one is visible.

In the in Figure 2 In the state shown, a compressive force is exerted on the inside of the swivel arm 31 by the compression spring 33 and due to the holding of the spring 33 in the spring holder 4, which pushes the swivel arm 31 outward, that is, away from the housing 30. A complete pushing out of the swivel arm 31 out of the housing 30 is prevented by the latching of the latching arms 311 with the counter geometry 300 that is produced.

In Figure 4 a schematic view of the embodiment of the fastening device 3 used according to the invention, which is attached to an extractor hood 1, is shown. Here is in Figure 4 the outside of the extractor housing 10 (see Figure 7 ) shown. A mounting opening 120 is made in the outer wall 12 of the extractor housing 10. The size and shape of the assembly opening 120 is selected such that at least the latching lug 310 of the pivot arm 31 can protrude through the assembly opening 120. On the other hand, the assembly opening 120 is designed so that it is smaller than the housing 30 of the fastening device 3 and the housing 30 thus reliably rests against the outer wall 12 from the inside. To attach the Fastening device 3 on the outer wall 12, the fastening device 3 is placed on the inside of the outer wall 12 and shifted upward so that the insertion feet 302 protruding forward from the housing and protruding through the mounting opening 120 engage an edge of the mounting opening 120. In addition, the bottom of the housing 30 can be screwed to the outer wall 12 from the inside using a screw 314.

In Figure 5 FIG. 13 is the view of the rear of the fastening device 3 in the state in which it is mounted on the outer wall 12 of the extractor housing 10 Figure 4 shown. The spring holder 4 is in a first position relative to the housing 30 and protrudes beyond the rear wall of the housing 30.

In this state of the fastening device 3, the extractor hood 1 on which the fastening device 3 is provided can be brought into a cabinet 2 from below. The various states of the fastening device 3 which are passed through are shown in FIGS Figures 7 to 10 shown. On the extractor hood 1, fastening devices 3 are provided on both sides in the outer wall 12 of the extractor housing 10. On the side walls 20 of the cabinet 2, which is a wall cabinet, wall brackets 200 are attached in the lower area. The wall brackets 200 together with the fastening devices 3 form the suspension system for the extractor hood 1. The wall brackets 200 each have a bracket geometry 201 which, in the embodiment shown, has a V-shaped projection. The upper leg of the V-shaped projection serves as a support surface 2010 and is also referred to as such in the following. The lower leg of the V-shaped projection serves as a guide surface 2011 and is also referred to as such in the following.

The distance between the two mounting geometries 201, i.e. between the tips of the projections, corresponds to the width of the extractor housing 10 of the extractor hood 1 and is preferably slightly smaller than this distance so that the extractor hood 1 can be inserted between the mounting geometries 201.

If the extractor hood 1 and in particular the extractor housing 10 is now pushed into the cabinet 2 from below, the pivot arm 31 of the respective fastening device 3 meets the bracket geometry 201 of the wall bracket 200 and in particular the guide surface 2011. This state is shown in FIG Figure 8 shown. By pushing the extractor housing 10 upwards into the cabinet 2, the pivot arm 31 tilts about its axis of rotation D into the interior of the housing 30. The tilting movement compresses the compression spring 33. This state is in Figure 9 shown. As soon as the fitter has pushed in the extractor hood 1 and in particular the extractor housing 10 far enough, the spring force causes the swivel arm 31 to be reset. The extractor hood 1 is fixed in the furniture, that is, in the cabinet 2. This state is in Figure 10 shown.

In order to secure the extractor hood 1 in the fixed, suspended position, according to the invention the spring holder 4 is pushed into the passage opening 301 on the rear of the housing and fixed until it rests directly on the swivel arm 31. As a result, the freedom of movement of the pivot arm 31 is blocked. How out Figure 12 showing this state, the pivot arm 31 has a fixing projection 313 on the rear side for this purpose. The fixing projection 313 engages in the open side of the spring holder 4. The open side of the spring holder, which can also be referred to as a recess, thus forms a fixing device. The fixing projection 313 on the pivot arm 31 is also shown in FIG Figure 2 to see.

For the transition of the fastening device 3 from the state in which it fixes the extractor hood 1 to the cabinet 2 to the state in which the pivot arm 31 is blocked, the spring holder 4 is moved from a first relative position to the housing 30 into a second relative position brought. In the embodiment of the spring holder 4, which is shown in Figure 11 As can be seen in more detail, four bayonet projections 4011 are provided as connection geometry 401 on the outside of the base body 40 of the spring holder 4. When the spring holder 4 is inserted into the passage opening 301, the bayonet projections 4011 are aligned with bulges 3011 provided on the passage opening 301. After the first two radially opposite bayonet projections 4011 lie in the interior of the housing 30, the spring holder 4 can be rotated about its longitudinal axis. For this purpose, in the embodiment shown, a slot for a tool is provided in the head 41 of the spring holder 4 intended. In order to block the swivel arm 31, the spring holder 4 is pushed further into the housing 30 until the two further bayonet projections 4011, which are provided in the vicinity of the head 41 on the base body 40 of the spring holder 4, the passage opening 301 and the bulges provided thereon 3011 and are inside the housing 30. After passing the bayonet projections 4011, the spring holder 4 is rotated again about its longitudinal axis in order to prevent the spring holder 4 from slipping out.

Another embodiment of the spring holder 4 is shown in Figures 13 and 14 shown. In this embodiment as well, the spring holder 4 has a base body 40 which has an open longitudinal end. The open longitudinal end is also known as the recess. The compression spring 33 is inserted into the open longitudinal end. The compression spring 33 is preferably placed loosely in the recess. However, it is also possible for the compression spring 33 to be firmly connected to the spring holder 4. The compression spring 33 can be connected to the spring holder 4, for example, by gluing or by a receiving element (not shown). In the embodiment shown, an external thread 4010 is provided on the outside of the base body 40 of the spring holder 4 as a connecting geometry 401. The position of the spring holder 4 in the fastening device 3 can be changed via the external thread 4010. For this purpose, the external thread 4010 engages in an internal thread 3010 introduced in the passage opening 301. When the extractor hood 1 is brought into the cabinet 2, the spring holder 4 is preferably only screwed in 1-2 threads. In order to secure the extractor hood 1 in the installed state, the spring holder 4 is then screwed in as far as possible. Depending on how large the distance between the two cabinet side walls is, the spring holder 4 can be screwed in differently. This allows a certain independence from the tolerances of the distance between the two cabinet walls. In order to be able to dismantle the extractor hood 1, the screw cap must be completely opened and the spring 33 must be removed.

The spring holder 4 can also be rotated in this embodiment either manually or with a tool (screwdriver). For turning by means of a tool, in the embodiment shown, a slot is made in the head 41 of the spring holder 4, into which a slot screwdriver can engage.

In Figure 6 is a view of the interior of the extractor hood 1 and in particular of the extractor housing 10 from below. Here, the drawer 13 is pulled out to the front. In the interior, the extractor housing 10 is formed by an inner wall 11. A passage opening (not visible) is made in the inner wall 11, which is in the in Figure 6 is covered by a cap 110 shown, mounted state. This ensures that the interior of the extractor hood is easy to clean. After the extractor hood 1 has been installed in the cabinet 2, the spring holder 4 standing in the extractor hood interior is covered with the cover cap 110. The cover cap 110 closes the passage opening (not visible) in the sheet metal of the inner wall 11, through which the spring holder 4 dips into the interior of the extractor hood 1. In addition, the plunger-like spring holder 4, which is difficult to clean, is covered by the smooth and round geometry of the cover cap 110. This ensures easy cleaning of the interior without protruding parts.

Behind the cover cap 110 is the spring holder 4, which is accessible from the interior of the extractor housing 10 through a passage opening (not visible). Thus, the spring holder 4 can be pushed into the housing 30 of the fastening device 3 via the passage opening (not visible) and / or screwed in or pulled out and / or screwed out.

In order to be able to dismantle the extractor hood 1, that is, to be able to take it out of the cabinet 2, the cover cap 110 is first removed and then the spring holder 4 and the compression spring 33 are removed from the housing 30. By removing the spring force, the extractor hood 1 can be removed from the cabinet 2 downwards.

In Figure 15 the determination of the geometry of a swivel arm 31 for the fastening device 3 used according to the invention is shown schematically.

For the circular arc K which forms the underside of the swivel arm 31, a radius of 30mm was assumed here at the point where it rests on the wall bracket 201 (Rp18 = 30mm). The center of this circular arc K must not coincide with the axis of rotation D, since otherwise no height compensation of the extractor hood 1 would be possible. To determine the position of the center M of the circular arc, assumed a desired possible height compensation. In the case shown, the extractor hood should be able to be raised by up to 5mm in order to correct assembly errors. This desired height compensation corresponds to the maximum distance that may exist between the radius R around the axis of rotation D and the circular arc K of the pivot arm 31. If this maximum distance is subtracted from the angular position of the radius R at which an arc has the structurally greatest possible depth, then the center point can be determined. As in Figure 15 shown, in the example shown, the angular position of the locking lug is 55 ° to the vertical (p16 = 55 °). The circular arc K formed around the center point determined in this way and over the angular range has a distance from the vertical in the direction of the locking lug 310 upwardly from the axis of rotation D that is steadily decreasing. The top of the locking lug 310 represents a straight line. It should be noted here that in the case of the in Figure 15 An offset is planned over the course of the pivot arm 310 to the locking lug. In the example shown, this offset is 3mm (p13 = 13mm). However, it is also possible for the swivel arm 31 to be straight, that is to say without an offset, in the area between the axis of rotation D and the locking lug 310.

The present invention has a number of advantages. On the one hand, additional adjustment of the extractor hood in the wall cabinet is not necessary. Due to the geometry of the swivel arm and the wall bracket, the extractor hood pulls itself automatically to the lower edge of the wall unit. A gap between the extractor hood, in particular between the drawer of the extractor hood or a rail profile of this drawer, and the wall cabinet does not arise or does not have to be adjusted by adjustment. A gap between the extractor hood and the lower edge of the cabinet must be avoided for optical reasons. This requirement is met in particular by the special geometry of the swivel arm.

The fastening device and the suspension system according to the invention are suitable for use on flat screen hoods, but can also be used, for example, for fan modules if they are positioned differently in furniture.

With the spring-swivel arm system used according to the invention, which is characterized by its ingenious simplicity in assembly (one-man assembly) of the extractor hood, extractor hoods can be attached to furniture with a wall thickness of 16mm as well as in furniture with a wall thickness of 19mm .

With the present invention, in particular, an error in the assembly of the wall brackets on the cabinet can be compensated for. If the wall bracket is positioned too low in the cabinet, there will be a gap between the extractor hood and the lower edge of the cabinet. A gap at this point would mean that an unacceptable visual appearance of the extractor hood is created in the furniture. Furthermore, more dirt could accumulate in the gap, which is difficult to remove at this point. With the present invention, the formation of a gap is avoided even if the wall bracket is incorrectly positioned.

Furthermore, the solution according to the invention is customer-friendly, in particular since no readjustment is necessary, since the extractor hood is automatically pulled up to the lower edge of the wall cabinet. No additional components are required for readjustment, so that costs are also reduced. No tools are required for readjustment. In addition, an assembly error of up to 5mm, for example, can be compensated. Finally, the invention offers ease of cleaning because there is no gap between the lower edge of the cabinet and the extractor hood.

The solution according to the invention also has excellent haptic properties due to the spring-swivel arm mechanism. A very simple and quick dismantling of the extractor hood is made possible. The invention is easy to manufacture, since screwless assembly of the fastening device is possible.

List of reference symbols

1

Extractor hood

10

Range hood housing

11

Inner wall

110

Cover cap

12

Outer wall

120

Assembly opening

13

drawer

2

cabinet

20th

side wall unit

200

Wall bracket

201

Bracket geometry

2010

Support surface

2011

Guide surface

3

Fastening device

30th

casing

300

Counter geometry

301

Passage opening

3010

inner thread

3011

bulge

302

Slide-in foot

303

Axle bracket

31

Swivel arm

310

Locking lug

311

Locking arm

312

Positioning projection

313

Fixing protrusion

314

screw

32

attack

33

feather

4th

Penholder

40

Base body

400

Spring passage

401

Connection geometry (on the outside)

4010

External thread

4011

Bayonet projection

41

head

R.

Swivel arm radius

D.

Pivot point swivel arm

M.

Center radius swivel arm

K

Circular arc

Claims (11)

1. Suspension system for fastening an extractor hood (1) in an item of furniture (2), wherein the suspension system has at least one fastening device (3) on the extractor hood and at least one wall bracket (200) for fastening to the wall (20) of the item of furniture (2), wherein the fastening device (3) has a housing (30), at least one swivel arm (31) with an inner face which faces the housing, and at least one compression spring (33), wherein the swivel arm (31) is movably held on the housing (30) about a swivel axis (D) and comprises a latching lug (310) which serves for engagement with the wall bracket, faces away from the housing of the fastening device, lies offset downwards relative to the swivel axis (D) and has an inner face facing the housing, and the compression spring (33) is perpendicular to the swivel axis (D) and engages with the inner face of the swivel arm (31) on the inner face of the latching lug (310) offset downwards relative to the swivel axis (D), and a support surface (2010) for resting the swivel arm (31) is formed on the wall bracket (200) and tilts upwards from the horizontal, and the swivel arm (31) has a lower face which describes a circular arc (K) whose distance from the vertical to the swivel axis (D) steadily decreases from below in the direction of the latching lug (310) of the swivel arm (31).
2. Suspension system according to claim 1, characterised in that the centre point (M) of the circular arc (K) is offset relative to the swivel axis (D) of the swivel arm (31).
3. Suspension system according to claim 1 or 2, characterised in that the circular arc (K) has a radius (R) of 28-32 mm to the centre (M) of the circular arc (K) and the difference between the radius (R) of the circular arc (K) and the same radius about the swivel axis (D) in the region of the latching lug (310) is at least 2 mm, particularly preferably 4 to 6 mm and more preferably 5 mm.
4. Suspension system according to one of claims 1 to 3, characterised in that the force of the compression spring (33) is adjustable.
5. Suspension system according to one of claims 1 to 4, characterised in that the fastening device (3) comprises a spring holder (4) which is movable with respect to the housing (30) and which supports the compression spring (33) at least in the axial direction and preferably also in the radial direction.
6. Suspension system according to one of claims 1 to 5, characterised in that the housing (30) has a passage opening (301) in the rear wall for access to the compression spring (33).
7. Suspension system according to one of claims 5 or 6, characterised in that the swivel arm (31) has a fixing projection (313) on its rear side for engagement with a fixing device of the fastening device, preferably a fixing device on the spring holder (4).
8. Suspension system according to one of claims 1 to 7, characterised in that the spring holder (4) has a base body (40) with an interior space for receiving a compression spring (33) and on the outer face of the base body (40) has a connection geometry (401), in particular at least one bayonet proj ection (4011) or an external thread (4010).
9. Suspension system according to one of claims 1 to 8, characterised in that the fastening device (3) is arranged between an outer wall (12) and an inner wall (11) of the extractor housing (10).
10. Suspension system according to one of claims 1 to 9, characterised in that a passage opening (111) for access to at least part of the fastening device (3) is introduced in the inner wall (11) of the extractor housing (10).
11. Suspension system according to one of claims 1 to 10, characterised in that the extractor hood (1) is a flat screen hood.

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