Roof windows and methods for operating a roof window

Abstract

The invention relates to a roof window (1) with a frame (2) and a sash (3) pivotally mounted about a pivot axis (4) relative to the frame (2) by means of a pivot bearing device (5), wherein the pivot bearing device (5) comprises a first pivot bearing part (6) that is stationary relative to the frame (2) and a second pivot bearing part (7) associated with the sash (3) and pivotally mounted about the pivot axis (4) on the first pivot bearing part (6). The sash (3) is connected to the second pivot bearing part (7) via an adjustment device (8), by means of which the sash (3) can be translationally displaced relative to the second pivot bearing part (7) so that the distance of the sash (3) to the pivot axis (4) can be adjusted. The invention further relates to a method for operating a roof window (1).

Description

[0001] The invention relates to a roof window comprising a frame and a sash mounted relative to the frame by means of a pivot bearing device for pivotal movement about a pivot axis. The pivot bearing device comprises a first pivot bearing part that is stationary relative to the frame and a second pivot bearing part associated with the sash and mounted on the first pivot bearing part for pivotal movement about the pivot axis. The invention further relates to a method for operating a roof window.

[0002] For example, EP 1 813 753 A1 is known from the prior art. This document describes a roof window, in particular a residential roof window, with a frame having side rails and with a sash having an upper cross rail, which has a rotary sliding guide in the region of its upper cross rail, the sliding guide track of which extends over at least one of the side rails or at least a section of the side rail of the frame, with an auxiliary lever being assigned to at least one side rail. It is provided that the auxiliary lever has, at a fixed distance from one another, a frame pivot bearing engaging the frame and stationary relative to the frame, and a sash pivot bearing engaging the frame and stationary relative to the sash.

[0003] Furthermore, the document WO 00 / 28184 A1 describes a fitting for a pivoting window, in which one end of the sash is guided in grooves of the frame, wherein one end of a projection rod is mounted in a first frame fastening near one end of the frame and a first telescopic arm of a telescopic rod is mounted in a second frame fastening near the other end of the frame, wherein the other end of the rod is mounted on a second telescopic arm of the telescopic rod and one end of the second telescopic arm is mounted in a sash fastening substantially at the center of gravity of the sash, wherein the sash fastening is thereby forced along a substantially rectilinear displacement path when the sash is rotated, whereby the sash can be rotated substantially through 180°, wherein the window frames which comprise the groove are the horizontal or the vertical frame sections.

[0004] The object of the invention is to propose a roof window which has advantages over known roof windows, in particular ensuring flexible handling and enabling cleaning of the roof window with little effort.

[0005] This is achieved according to the invention with a roof window having the features of claim 1. It is provided that the sash is connected to the second pivot bearing part via an adjusting device, by means of which the sash can be displaced translationally with respect to the second pivot bearing part, so that a distance of the sash to the pivot axis can be adjusted.

[0006] Advantageous embodiments with useful further developments of the invention are specified in the dependent claims. It should be noted that the exemplary embodiments explained in the description are not limiting; rather, any variations of the features disclosed in the description, the claims, and the figures are feasible.

[0007] The roof window is preferably part of a building, but can of course also be separate from it, in particular until it is mounted on the building or on a roof of the building. The building has the roof, for arrangement on or in which the roof window is intended and designed. The roof lies between an exterior environment of the building and an interior of the building, thus separating them from each other. The roof window serves to at least temporarily and / or partially close a recess formed in the roof. This recess can also be referred to as a roof opening.

[0008] The roof essentially consists of a roof structure and a roof covering. The roof structure has, for example, one or more rafters and one or more roof battens. In addition, the roof structure has insulation, which can be designed as under-rafter insulation, between-rafter insulation and / or above-rafter insulation. In this description, the insulation is also referred to as roof insulation to better distinguish it from other elements. The roof battens can be divided into counter battens and support battens, whereby the presence of counter battens is optional. The support battens are usually arranged at an angle, in particular perpendicular, to the rafters and attached to them. The counter battens, on the other hand, preferably run at an angle to the support battens, in particular perpendicular to them, and / or parallel or at least essentially parallel to the rafters.

[0009] The roof skin is arranged or attached to the outside of the roof structure, thus defining the roof structure's boundary towards the outside. The term "roof skin" refers, in particular, to a roof covering or roof waterproofing. The roof covering comprises, for example, a plurality of roof tiles, roof stones, roof shingles, or the like. Towards the inside, i.e., towards the interior, the roof structure is preferably defined by an interior wall. For this purpose, the interior wall is arranged and / or attached to the roof structure on its side facing the interior. For example, the skylight is connected to the interior wall via an interior lining.

[0010] The roof window can also be referred to as a roof window and is preferably a residential roof window or residential roof window. It is preferably designed to close the roof opening in a translucent or opaque manner, at least partially, preferably completely. If the roof window is translucent, it is particularly equipped with glazing, which can be single or multiple glazing, for example, double or triple glazing.

[0011] The roof window comprises a frame and a sash, with both the frame and the sash each having several frame members. The frame members of the frame can also be referred to as frame members, and the frame members of the sash can also be referred to as sash members. The frame members of each frame are attached to each other in such a way that they sandwich a section of the roof window between them. The frame members of each frame thus form a closed frame or closed frame element.

[0012] The frame and the sash are particularly designed such that they overlap and / or cover the roof opening. Preferably, the frame and the sash are arranged and designed such that, in particular together with the glazing, they completely close the roof opening at least temporarily. The glazing is preferably supported by the sash. For example, it is enclosed by the multiple sash members of the sash. The sash members preferably completely and continuously encompass the glazing, or the glazing rests on each of the sash members and is thus supported by them.

[0013] The roof window is openable and closable, i.e. it can be opened and closed, and is designed accordingly. Consequently, the roof window can be in different opening states, in which the two frames of the roof window, i.e. the outer frame and the sash frame, are arranged differently relative to one another. For example, the roof window is closed in a first opening state and at least partially or even completely open in a second opening state. The first opening state can also be referred to as the closed state and the second opening state as the open state. In the closed state of the roof window, an opening delimited by the outer frame is closed more closely by the sash frame, in particular together with the glazing, than in the open state; in particular, the opening of the outer frame is completely closed by the sash frame in the closed state, preferably together with the glazing.

[0014] To enable the roof window to be opened and closed, the sash can be moved relative to the outer frame, or more precisely, it can be pivoted or rotated. If the glazing is present, it is preferably arranged or fastened to the sash and is only indirectly supported by the outer frame and / or the building via the sash. Accordingly, the glazing can be moved or pivoted together with the sash relative to the outer frame. For this purpose, the sash is mounted so as to be pivotable about the pivot axis relative to the outer frame, in particular on the outer frame. In the first opening state, the sash is in a first position relative to the outer frame and in the second opening state it is in a second position. Following the designations defined above, the first position can be a closed position and the second position an open position.

[0015] For example, the sash can be pivoted relative to the frame about a first pivot axis. The first pivot axis lies - when the roof window is installed as intended - on an upper side of the frame or at least in an upper third of the frame. Such a roof window can also be referred to as a top-hung window. The first pivot axis is preferably used as the pivot axis already mentioned. In addition, it can be provided that the sash can be pivoted relative to the frame about a second pivot axis, namely about a second pivot axis different from the first pivot axis. The second pivot axis lies, for example, in a middle third of the frame. Preferably, the sash can be pivoted relative to the frame about both the first pivot axis and the second pivot axis. Such a roof window is also referred to as a top-hung window.

[0016] The roof window has a pivot bearing device that pivotally mounts the sash frame relative to the outer frame. The sash frame is mounted around the pivot axis by means of the pivot bearing device, which is preferably stationary relative to the outer frame, i.e., independent of the position of the sash frame. The pivot bearing device has a first pivot bearing part and a second pivot bearing part. The two pivot bearing parts, i.e., the first pivot bearing part and the second pivot bearing part, are pivotally mounted relative to one another, specifically around the pivot axis. The first pivot bearing part is stationary relative to the outer frame, in particular, is attached to the outer frame. The first pivot bearing part preferably engages directly with the outer frame. The second pivot bearing part, however, is associated with the sash frame.When the sash frame is pivoted relative to the frame around the pivot axis, the second pivot bearing part and the sash frame are moved together.

[0017] With the described pivot bearing device, the roof window can initially be opened. However, reaching the outside of the roof window, in particular the sash or the glazing, as is necessary, for example, for cleaning, is difficult. A person performing the cleaning must lean out of the roof window, namely through the opening created between the frame and the sash, in order to clean the sash and, in particular, the outside of the glazing with a suitable cleaning tool. Efforts to facilitate cleaning are known from the prior art.

[0018] Typically, the measures used for this purpose involve pivoting the sash frame about two spaced-apart pivot axes, for example both about the first pivot axis and the second pivot axis, which were already mentioned above. This makes it possible to position the outside of the sash frame or the glazing in such a way that it is easier to reach from the interior, in particular without the person having to lean too far out of the roof window. A disadvantage of the known approaches, however, is that the roof window must first be opened comparatively far around the first pivot axis in order to then perform the additional pivoting of the sash frame about the second pivot axis.

[0019] For this reason, the roof window according to the invention features the adjustment device. The sash is connected to the second pivot bearing part via the adjustment device. The adjustment device enables the sash to be adjusted or displaced relative to the second pivot bearing part, namely, a translational displacement. This means that the adjustment device does not permit rotation or pivoting of the sash relative to the second pivot bearing part, but only a translational movement of the sash relative to the second pivot bearing part. Accordingly, the distance of the sash from the pivot axis can be adjusted or changed using the adjustment device.

[0020] To clean the roof window, for example, the roof window is opened, in particular by pivoting the sash about the first pivot axis, wherein the distance of the sash from the pivot axis initially corresponds to a first distance. The sash is then displaced translationally using the adjusting device so that the distance of the sash from the pivot axis increases and subsequently corresponds to a second distance which is greater than the first distance. The roof window is preferably designed such that by displacing the sash with respect to the pivot axis, an opening is released between the sash and the second pivot axis. The opening therefore has a first degree of opening at the first distance and a second degree of opening at the second distance, wherein the second degree of opening is greater than the first degree of opening.For example, the first degree of opening is zero, so that at the first distance the opening is not opened or is completely closed by the sash frame.

[0021] In this state of the roof window, i.e. when the sash is less than the second distance from the pivot axis, the distance between the sash frame and the pivot axis is preferably dimensioned such that the person can move through the opening created between the sash frame and the pivot axis and thus gain access to the outside of the sash frame or the glazing. The outside is understood to be the side of the respective element that faces the outside when the roof window is closed. With the aforementioned design of the roof window, the risk of accidents when cleaning the roof window is already significantly reduced. The second distance is therefore, for example, at least 30 cm, at least 40 cm or at least 50 cm.Alternatively, the second distance, which is present in a specific direction perpendicular to the pivot axis, can be at least 10%, at least 20%, or at least 30% of the sash extension in this direction. This ensures the presence of a sufficiently large opening when the sash is positioned at the second distance from the pivot axis. This allows for flexible operation of the roof window and provides quick and safe access to the outside of the sash and / or the glazing.

[0022] A further development of the invention provides that the adjustment device is designed as a linear adjustment device, by means of which the sash frame can be displaced along a straight guide axis relative to the second pivot bearing part to adjust the distance of the sash frame from the pivot axis. The linear adjustment device thus guides the sash frame relative to the second pivot bearing part along an imaginary straight line, namely the straight guide axis. This achieves the aforementioned advantages and also ensures easy operation of the roof window.

[0023] A further development of the invention provides that the guide axis lies entirely in an imaginary plane which accommodates the pivot axis or is arranged parallel to it. With the help of the adjusting device or linear adjusting device, the sash is guided in the imaginary plane, namely along the guide axis accommodated by the imaginary plane. The imaginary plane either accommodates the pivot axis entirely or is arranged parallel to it. Ultimately, a displacement of the sash with respect to the pivot axis is achieved in this way. Particularly preferably, the guide axis is angled with respect to the pivot axis or a straight line parallel to the pivot axis which lies in the imaginary plane, i.e. it encloses an angle with it that is greater than 0° and less than 180°.In particular, the guide axis is perpendicular to the pivot axis or to the straight line parallel to it, so that the angle is exactly or approximately 90°. This achieves the aforementioned advantages in a structurally simple manner.

[0024] A further development of the invention provides that the adjusting device is connected to the sash frame via a joint arrangement, by means of which the sash frame is pivotally mounted about a further pivot axis with respect to the adjusting device. In addition to the adjusting device, the joint arrangement is therefore present between the second pivot bearing part and the sash frame. In other words, the second pivot bearing part is connected to the joint arrangement via the adjusting device, in particular exclusively. In addition, the adjusting device is connected to the sash frame via the joint arrangement, preferably likewise exclusively. While the adjusting device enables the translational displacement of the sash frame with respect to the second pivot bearing part, the sash frame can be rotated about the further pivot axis with the aid of the joint arrangement, namely with respect to the adjusting device and thus also with respect to the second pivot bearing part.The further pivot axis preferably corresponds to the second pivot axis already mentioned above, so that the roof window is a top-hung window.

[0025] The hinge arrangement allows the outer side of the sash frame or glazing to be rotated toward the interior, making it easier to access from the interior, for example, for cleaning. The combination of the hinge arrangement with the adjustment device ultimately has the advantage that the sash frame can be pivoted around the additional pivot axis even when the roof window is opened to a smaller degree; thus, the roof window does not have to be opened as far to pivot the sash frame around the additional pivot axis as is the case with conventional roof windows. This significantly simplifies the operation of the roof window.

[0026] A further development of the invention provides that the further pivot axis can be displaced relative to the pivot axis by means of the adjusting device, in particular displaced parallel to it. With different distances between the sash frame and the pivot axis, different distances between the two pivot axes exist from each other, i.e., the pivot axis and the further pivot axis. Particularly preferably, the pivot axes are parallel to each other at any distance between the sash frame and the pivot axis that exists when the adjusting device is used as intended. This, in turn, achieves the described advantages, while at the same time keeping the roof window structurally simple.

[0027] A further development of the invention provides that the adjusting device has a first locking device, by means of which the sash can be fixed in at least one translational position with respect to the second pivot bearing part. With the aid of the adjusting device, the sash can be arranged in different translational positions, which differ with regard to the respective distance of the sash from the pivot axis. In at least one of these positions, the sash can be fixed with respect to the second pivot bearing part, namely with the aid of the first locking device. When the first locking device is locked, the sash is fixed in the translational position; however, when the first locking device is unlocked, it is released for displacement with respect to the second pivot bearing part.

[0028] The first locking device is preferably designed such that it locks automatically as soon as the sash is in the at least one translational position. This means that when the sash reaches the translational position, the first locking device locks automatically, whereby the sash is fixed in the translational position. The first locking device is designed such that it must subsequently be unlocked in order to permit the displacement of the sash with respect to the second pivot bearing part along the guide axis. The first locking device is preferably provided and designed to fix the sash in several different translational positions. In particular, it is designed such that it automatically fixes the sash in each of these several positions.This ensures good operating comfort of the roof window.

[0029] A further development of the invention provides that the joint arrangement has a second locking device, by means of which the sash can be fixed in at least one rotational position with respect to the second pivot bearing part and / or the adjusting device. With the aid of the joint arrangement, the sash can be arranged in different rotational positions with respect to the adjusting device and thus to the second pivot bearing part. The second locking device, analogous to the first locking device, is present either in a locked or unlocked state. It serves to fix the sash in at least one rotational position. When the second locking device is locked, the sash is fixed in the rotational position, whereas when the second locking device is unlocked, it is released for pivoting about the additional pivot axis.Preferably, the sash can be locked in different rotational positions using the second locking device, in which the sash is arranged differently with respect to the second pivot bearing part or the adjustment device. Automatic locking is also preferred when the sash reaches the rotational position. This makes the roof window particularly easy to operate.

[0030] A further development of the invention provides that the sash can be displaced into a first position and a second position with respect to the second pivot bearing part by means of the adjusting device, wherein distances of the sash from the pivot axis differ from one another in the two positions by at least 30%, at least 40% or at least 50% of an extension of the sash in a direction of displacement of the sash between the positions. The displacement direction is understood to be the direction in which the sash is displaced when it is displaced between the positions. It preferably corresponds to the guide axis or is parallel to it. The adjusting device enables the sash to be displaced to a relevant extent, not just, for example, an adjustment of the sash relative to the frame, in which the sash is only moved slightly.In particular, the adjustment device enables the sash frame to be moved in such a way that the aforementioned opening between the sash frame and the pivot axis is subsequently created or released, through which the person can easily reach the outside of the sash frame or the glazing.

[0031] A further development of the invention provides that the adjustment device has several telescopic rails that engage the sash frame at a distance from one another. The telescopic rails serve to guide the translational displacement of the sash frame relative to the second pivot bearing part, namely along the guide axis. The telescopic rails are arranged at a distance from one another on the sash frame, preferably engaging different frame members of the sash frame, in particular different vertical members. The telescopic rails ensure reliable guidance of the sash frame and thus easy operation of the roof window.

[0032] The invention further relates to a method for operating a roof window, in particular a roof window according to the embodiments in this description, wherein the roof window has a frame and a sash mounted by means of a pivot bearing device for pivoting about a pivot axis relative to the frame, and wherein the pivot bearing device has a first pivot bearing part that is stationary with respect to the frame and a second pivot bearing part that is assigned to the sash frame and mounted on the first pivot bearing part for pivoting about the pivot axis. Provision is made for the sash frame to be connected to the second pivot bearing part via an adjusting device, by means of which the sash frame is translationally displaced relative to the second pivot bearing part, such that a distance of the sash frame from the pivot axis changes.

[0033] The advantages of such a roof window design and such a procedure have already been pointed out. Both the roof window and the method for its operation can be further developed according to the explanations in this description, so reference is made to these in this regard.

[0034] The features and feature combinations described in the description, in particular the features and feature combinations described in the following description of the figures and / or shown in the figures, can be used not only in the respective combination specified, but also in other combinations or on their own, without departing from the scope of the invention. Thus, embodiments are also considered to be encompassed by the invention that are not explicitly shown or explained in the description and / or the figures, but which follow from or can be derived from the explained embodiments.

[0035] The invention is explained in more detail below with reference to exemplary embodiments illustrated in the drawings, without limiting the invention. In the drawings: Fig. 1 a schematic representation of a roof window with a frame and a sash, wherein the sash is in a first translational position and a first rotational position, Fig. 2 a schematic representation of the roof window, wherein the sash frame is arranged in a second translational position and the first rotational position, Fig. 3 a schematic representation of the roof window, in which the sash frame is in the second translational position and a second rotational position, and Fig. 4 a schematic representation of the roof window in which the sash frame is in the second translational position and a third rotational position.

[0036] The Fig. 1 shows a schematic representation of a roof window 1, which has a frame 2 and a sash 3. The sash 3 is pivotally mounted with respect to the frame 2 about a first pivot axis 4, namely by means of a pivot bearing device 5. The pivot bearing device 5 has a first pivot bearing part 6 and a second pivot bearing part 7, wherein the first pivot bearing part 6 is arranged stationary with respect to the frame 2, in particular is fastened to the frame 2. The second pivot bearing part 7, on the other hand, is assigned to the sash 3, so that the sash 3 is pivotally mounted about the first pivot axis 4 via the second pivot bearing part 7 on the first pivot bearing part 6.

[0037] In addition to the pivot bearing device 5, the roof window 1 has an adjusting device 8, which serves to translate the sash frame 3 relative to the second pivot bearing part 7. For this purpose, the sash frame 3 is connected, preferably exclusively, to the second pivot bearing part 7 via the adjusting device 8. The adjusting device 8 has a plurality of telescopic rails 9, of which only one is visible here. It enables the sash frame 3 to be moved relative to the second pivot bearing part 7 along a straight guide axis, which lies entirely in an imaginary plane. This imaginary plane preferably completely accommodates the first pivot axis 4 or is at least arranged parallel to the first pivot axis 4. The guide axis is preferably perpendicular to the first pivot axis 4 or a straight line parallel to the first pivot axis 4.

[0038] The adjusting device 8 is preferably articulated to the sash 3 via a joint arrangement 10. With the help of the joint arrangement 10, the sash 3 can be pivoted relative to the telescopic rails 9 about a second pivot axis 11. The second pivot axis 11 is preferably arranged parallel to the first pivot axis 4, regardless of the position of the sash 3. Not shown here are a first locking device and a second locking device. The first locking device serves to fix the sash 3 relative to the second pivot bearing part 7 in the direction of the guide axis, and the second locking device serves to fix the sash 3 relative to the adjusting device 8 about the second pivot axis 11. Shown here is the roof window 1 with the sash 3 arranged in a first translational position and a first rotational position.

[0039] The Fig. Figure 2 shows a schematic representation of the roof window 1, wherein the sash frame 3 is displaced in the translational direction from the first translational position to a second translational position by means of the adjustment device 8. However, it remains in the first rotational position. It can be seen that the translational displacement between the sash frame 3 and the first pivot axis 4 at least partially opens an opening. The opening 12 is dimensioned such that a person operating the roof window 1 can pass through it to the outside of the roof window 1 or at least can grasp the roof window 1 on the outside.

[0040] The Fig. 3 again shows the roof window 1 in a schematic representation. The sash 3 is still in the second translational position, but has been pivoted about the second pivot axis 11 from the first rotational position into a second rotational position. In this position, the sash 3 is vertical and at least approximately vertical to the frame 2. In particular, a sash plane spanned by the sash 3 is vertical or at least almost vertical to a frame plane spanned by the frame 2. As a result, the opening 12 is further enlarged and, in addition, the outer side of the sash 3 faces the opening 12, thus enabling easy access to the outer side.

[0041] The Fig.4 again shows the roof window 1 in a schematic representation. The sash frame 3 is again arranged in its second translational position, but is in a third rotational position. In this position, the outer side of the sash frame 3, or a glazing supported by the sash frame 3, faces further toward the opening 12 than in the second rotational position. This position can also be referred to as the cleaning position, as it allows easy access to the outer side of the frame 2, in particular for cleaning the sash frame 3. Overall, the described roof window 1 achieves expanded functionality and a high degree of flexibility. LIST OF REFERENCE SYMBOLS 1 skylight 2 frame 3 sash frames 4 1. Swivel axis 5 Swivel bearing device 6 1. Swivel bearing part 7 2. Swivel bearing part 8 Adjustment device 9 Telescopic rail 1 Joint arrangement 10 11 2nd swivel axis 12 Opening QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] EP 1 813 753 A1

[0002] WO 00 / 28184 A1

[0003]

Claims

[1] Roof window (1), with a frame (2) and a sash frame (3) mounted by means of a pivot bearing device (5) about a pivot axis (4) with respect to the frame (2), wherein the pivot bearing device (5) has a first pivot bearing part (6) which is stationary with respect to the frame (2) and a second pivot bearing part (7) which is assigned to the sash frame (3) and mounted on the first pivot bearing part (6) so as to be pivotable about the pivot axis (4), characterized by that the sash frame (3) is connected to the second pivot bearing part (7) via an adjusting device (8), by means of which the sash frame (3) can be displaced translationally with respect to the second pivot bearing part (7), so that a distance of the sash frame (3) to the pivot axis (4) can be adjusted. [2] Roof window according to claim 1, characterized bythat the adjusting device (8) is designed as a linear adjusting device, by means of which the sash frame (3) can be displaced along a straight guide axis in order to adjust the distance of the sash frame (3) to the pivot axis (4) with respect to the second pivot bearing part (7). [3] Roof window according to one of the preceding claims, characterized by that the guide axis lies completely in an imaginary plane which accommodates the pivot axis (4) or is arranged parallel to it. [4] Roof window according to one of the preceding claims, characterized by that the adjusting device (8) is connected to the sash frame (3) via a joint arrangement (10), by means of which the sash frame (3) is pivotally mounted about a further pivot axis (11) with respect to the adjusting device (8). [5] Roof window according to one of the preceding claims, characterized bythat the further pivot axis (11) can be displaced relative to the pivot axis (4) by means of the adjusting device (8). [6] Roof window according to one of the preceding claims, characterized by that the adjusting device (8) has a first locking device by means of which the sash frame (3) can be fixed in at least one translational position with respect to the second pivot bearing part (7). [7] Roof window according to one of the preceding claims, characterized by that the joint arrangement (10) has a second locking device by means of which the sash frame (3) can be fixed in at least one rotational position with respect to the second pivot bearing part (7) and / or the adjusting device (8). [8] Roof window according to one of the preceding claims, characterized byin that the sash frame (3) can be displaced into a first position and a second position with respect to the second pivot bearing part (7) by means of the adjusting device (8), wherein distances of the sash frame (3) from the pivot axis (4) differ from one another in the two positions by at least 30%, at least 40% or at least 50% of an extension of the sash frame (3) in the direction of a displacement direction of the sash frame (3) between the positions. [9] Roof window according to one of the preceding claims, characterized by that the adjusting device (8) has a plurality of telescopic rails (9) which engage the sash frame (3) at a distance from one another. [10] Method for operating a roof window (1), in particular a roof window (1) according to one or more of the preceding claims, wherein the roof window (1) has a frame (2) and a sash (3) mounted by means of a pivot bearing device (5) so as to be pivotable about a pivot axis (4) with respect to the frame (2), and wherein the pivot bearing device (5) has a first pivot bearing part (6) which is stationary with respect to the frame (2) and a second pivot bearing part (7) which is assigned to the sash (3) and mounted on the first pivot bearing part (6) so as to be pivotable about the pivot axis (4), characterized by that the sash frame (3) is connected to the second pivot bearing part (7) via an adjusting device (8), by means of which the sash frame (3) is translationally displaced with respect to the second pivot bearing part (7), so that a distance of the sash frame (3) to the pivot axis (4) changes.

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