Window and method for correcting the handle position of a window that can be manually and motorised

Abstract

The invention relates to a method for correcting the handle position of a manually and motor-operated window, which has a handle whose manual rotation is translated by means of a gearbox into a pushing movement of a push rod having at least one locking element, wherein the gearbox has as translating gearbox elements at least a gear connected to the handle and a rack meshing with the gear and connected to the push rod, and which has a drive with which, by applying force to a push rod lying in a fitting groove of the sash frame, the push rod is pushed in active operation and the handle is turned indirectly via the gearbox, wherein at least one of the translating gearbox elements in the gearbox is exchanged for a replacement element and thereby the gearbox with the at least one replacement element achieves a higher gear ratio.The invention also relates to a window of the aforementioned type, in which the gear ratio between two operating positions is greater than 5.0 degrees per 1 millimeter of stroke of the push rod, in particular greater than 5.1 degrees per 1 millimeter of stroke of the push rod, in particular greater than 5.25 degrees per 1 millimeter of stroke of the push rod, and more preferably greater than 5.35 degrees per 1 millimeter of stroke of the push rod. The invention also relates to a set comprising a window drive for installation in the frame of a window and a replacement gear element.

Description

[0001] The invention relates to a window comprising a frame and a sash, wherein the sash can be adjusted relative to the frame in at least two functional positions, and comprising a handle, the manual rotation of which is translated by means of a gear into a pushing movement of a push rod having at least one locking element, wherein the gear has as translating gear elements at least a gear connected to the handle and a rack meshing with the gear and connected to the push rod, and further comprising a drive with which, by applying force to a push rod lying in a fitting groove of the sash, the push rod can be moved and the handle can be rotated indirectly via the gear.

[0002] The invention also relates to a method for correcting the handle position, in particular in at least one of at least two functional positions, of a manually and motor-operated window, which has a handle whose manual rotation is translated by means of a gearbox into a pushing movement of a push rod having at least one locking element, wherein the gearbox comprises as translating gearbox elements at least a gear connected to the handle and a rack meshing with the gear and connected to the push rod, and which has a drive with which, by applying force to a push rod lying in a fitting groove of the sash frame, the push rod is pushed in active operation and the handle is turned indirectly via the gearbox.

[0003] Preferably, a correction of the handle position should be possible at least in the functional position corresponding to the closed position of the window. More preferably, a correction of the handle position should also be possible in other existing functional positions, in particular in a tilt position and / or a turn position and / or a parallel position, especially such that in each of the possible functional positions the orientation of the handle is either vertical or horizontal.

[0004] Preferably, the closed position refers to the position in which the sash is closed and locked within the frame. Furthermore, the pivot position refers to the position in which the sash can be freely opened about a vertical axis. The tilt position refers to the position in which the sash can be tilted about a horizontal axis by an angle limited by a stop. The parallel position refers to a position in which the sash is offset from the frame at a distance parallel to it. In a window according to the invention, at least two, preferably three or four, of the aforementioned functional positions are present in any combination, with one functional position always being the closed position.

[0005] The invention also relates to a set consisting of a window drive for installation in the frame of a window and a replacement gear element.

[0006] In such windows with a drive mechanism, the drive can, in principle, be attached to or within the window frame at any point. Preferably, the drive is attached to the frame or sash, and in particular integrated therein, e.g., in a recess cut into a frame profile.

[0007] With such windows equipped with a drive, when the handle is turned, at least in a predetermined position of the drive, there is no kinematic coupling between the push rod and the drive, so that a user can operate the window manually in the usual way by turning the handle.

[0008] In one possible embodiment of a force-actuating element (especially a driver) that engages a locking element (e.g., a bolt pin, particularly a mushroom-headed bolt or roller bolt) of the push rod, this can be achieved by the force-actuating element, which is movable by the drive, having a recess in which the locking element is freely movable at least in a specific position of the force-actuating element. This allows the window to assume all functional positions (e.g., closed, tilt, turn, parallel) by turning the handle. If, however, the force-actuating element is moved out of this specific position by the drive, it can contact the locking element, and the locking element, and consequently the push rod with the drive, can be displaced.Thus, a kinematic coupling between the drive and the handle exists only when the push rod is moved by means of the drive, but not when the push rod is moved by the handle. A drive of this type is known, for example, from publication DE 10 2019 105 034 A1 by the same applicants.

[0009] It may also be provided that a drive engages directly on a push rod, in particular where, in a certain position of the drive or its force transmission element acting on the push rod, there is no coupling with the push rod.

[0010] The standard mechanisms in windows are designed so that manually turning the handle by 5 degrees achieves a predetermined linear stroke of the push rod, primarily for switching between different positions of the window. This gear ratio remains constant for all possible operating positions. The standard stroke for European windows is 1 millimeter per 5 degrees of handle rotation. A maximum 180-degree turn of the handle results in a total stroke of approximately 36 millimeters. This is typically used to manually move the window from the tilted position to the closed position and vice versa.

[0011] Typically, the different operating positions of the window are spaced 90 degrees apart at the handle, specifically corresponding to an 18 mm working stroke of the push rod. A person usually turns the handle manually until the desired position is reached, the position they associate with the corresponding operating function. The handle is thus either horizontally or vertically oriented in each position.

[0012] Theoretically, a linear adjustment of the push rod by the drive should also result in a rotation of the handle by 5 degrees per 1 mm of working stroke, or 180 degrees for the total stroke. However, this only occurs when moving between two positions, provided all elements in the mechanical transmission chain between the drive and the handle are in contact with each other and the mechanical transmission chain is therefore effectively pressed without any backlash.

[0013] Due to the fact that the mechanical transmission chain between the drive, in particular the drive's power transmission element, and the window handle has some mechanical play, which is especially pronounced when reversing the movement, the problem arises that while the handle can be moved to the desired position manually, when the drive moves the push rod through a certain stroke, the handle lags behind the push rod's angular position by an angle corresponding to the play. Therefore, at least in the closed position, and especially in other functional positions, it does not reach the desired position. Particularly with a total stroke (e.g., of 36 mm), it does not complete a full 180 degrees of rotation and appears skewed, which users find disturbing.

[0014] The aforementioned play results, for example, as the sum of all mechanical plays between at least some or all of the following points: the coupling points between possibly several pushrod sections, the coupling between pushrod and rack, the coupling between rack and gear, the coupling between gear and square pin, and the coupling between square pin and handle.

[0015] The object of the invention is therefore to modify a window's gearbox, or to provide a window with a suitable gearbox, in order to achieve a desired position, in particular an aesthetically pleasing position of the handle, in at least one functional position when the window is operated by the drive, especially a position in which the handle is vertically oriented when the window is closed, as would be the case with manual operation. Preferably, further desired positions of the handle are, in the tilt position, also a vertical position, in particular in which the handle is inverted by 180 degrees relative to the closed position, and the rotation position in which the handle is positioned horizontally, optionally also a parallel position.

[0016] The problem is solved according to the invention in a window by the fact that the transmission ratio between two functional positions is greater than 5.0 degrees per 1 millimeter stroke of the push rod, in particular greater than 5.1 degrees per 1 millimeter stroke of the push rod, in particular greater than 5.25 degrees per 1 millimeter stroke of the push rod, and more preferably greater than 5.35 degrees per 1 millimeter stroke of the push rod.

[0017] Preferably, the linear total stroke of the push rod between the tilting position and the closed position, in particular a total stroke of 36 mm, is translated by means of the gearbox, in particular in the direction of action from the drive to the handle, into a rotation angle difference of the handle that is greater than 180 degrees, preferably greater than 183 degrees, in particular greater than 185 degrees, preferably greater than 189 degrees.

[0018] Preferably, the transmission has, with regard to its transmission elements (gear / rack), those features which are achieved and described as properties of the elements in the method described below.

[0019] The problem is solved by replacing at least one of the transmission elements in the gearbox with a replacement element, thereby achieving a higher transmission ratio with the at least one replacement element, particularly in the direction of action from the drive to the handle, especially compared to the transmission ratio before the replacement. In particular, the replacement results in a transmission ratio of more than 5.0 degrees of rotation per 1 mm of stroke, more specifically more than 5.1 degrees per 1 mm of stroke of the push rod, more specifically more than 5.25 degrees per 1 mm of stroke of the push rod, and more preferably more than 5.35 degrees per 1 mm of stroke of the push rod.

[0020] In particular, this is to be understood as meaning that the aforementioned transmission ratio according to the invention exists on average between two functional positions, especially between two maximally spaced functional positions, i.e., two functional positions spaced apart by the total stroke of the push rod. The invention does not require that the transmission have a constant transmission ratio along its entire possible range of motion, although this is preferred according to the invention. The transmission can also have different transmission ratios in different rotation angle ranges of the handle.

[0021] The invention thus makes it possible either to manufacture a window with a gearbox from the outset, which achieves more than 5.0 degrees per 1 mm working stroke of the push rod, or one of the aforementioned further preferred gear ratios, in particular which thus generates more than 180 degrees of rotation angle at the handle when the window with the drive is moved between maximally spaced functional positions, especially from the tilt position to the closed position (or vice versa), or to retrofit a conventional existing gearbox by replacing one or both gearbox elements so that this is possible. The latter is particularly advantageous when a drive is retrofitted in an existing window, or when a misalignment that is perceived as bothersome is subsequently discovered in a newly manufactured window with a drive.

[0022] In particular for the case of retrofitting, a set is provided according to the invention consisting of a window drive for installation in the frame of a window, with which a window with drive is achieved after its installation and a replacement gear element, wherein the aforementioned method is carried out by replacing the existing gear element in the gearbox of the window with the replacement gear element, in particular which further leads to a window according to the invention.

[0023] Preferably, the replacement gear element is selected from a group of replacement gear elements with different design features. This is advantageous, for example, because window gearboxes are typically available from various manufacturers on the market, all of which operate on the same principle, but implement it with slightly different gear element designs.

[0024] The invention allows, for example, a manufacturer-specific replacement gear element to be included in the set.

[0025] Although the gearbox, particularly at least on average, has the aforementioned gear ratio according to the invention and thus theoretically achieves a rotation of the handle that is greater than necessary to attain a desired handle position, this would only be achieved if the gearbox were backlash-free. However, due to the backlash present in the kinematic chain in practice, especially when reversing the direction of movement, the actual rotational path is smaller than the rotational path resulting from the gear ratio.

[0026] The invention thus deliberately utilizes the inherently disadvantageous play in the kinematic chain between drive and handle by adapting the gearbox, in order to achieve the desired positioning of the handle.

[0027] With all variants of the invention, it is thus achieved that when the push rod is moved by the drive between two functional positions, in particular when it is moved over the entire working stroke, especially of 36 mm, the handle is in a desired target position at the end of its rotational movement, especially also when it is rotated further by the drive.

[0028] The applicants have determined that the gear ratios according to the invention or the preferably specified gear ratios can compensate for the misalignment of the handle which is based on the play, in particular the backlash of the mechanical transmission chain of all elements between drive and handle.

[0029] Preferably, the invention provides that by replacing or originally manufacturing the gearbox, such an increase in the transmission ratio is achieved, in particular compared to conventional gearboxes, that the angular misalignment of the handle corresponding to a movement error in the kinematic chain between drive and handle is at least compensated, in particular overcompensated.

[0030] It is further preferably provided that an increase in the gear ratio of 2% to 20%, preferably 5% to 15%, and more preferably 5% to 9% of the original gear ratio is achieved, and / or an increase in the gear ratio, particularly compared to conventional gears, is achieved according to which, during the movement of the push rod by the drive between two maximally spaced functional positions, in particular from the tilted position to the closed position of the window, the handle, with the resulting total stroke, achieves a rotation angle of greater than 183 degrees, preferably greater than 185 degrees, more preferably greater than 189 degrees, and in particular less than 216 degrees, and in particular less than 207 degrees, due to the gear ratio. In particular, this resulting rotation angle is a theoretical angle that would be present if there were no backlash.Preferably, taking into account the play, the resulting angle is an actual angle that is smaller than the angle resulting from the gear ratio, but in particular an actual angle of 180 degrees or more.

[0031] The invention can preferably create a window, either by replacing a gear element or by originally manufacturing a window, in which the handle, when manually operated, can be rotated beyond a position in which the handle is vertically oriented, in particular by at least 1.5 degrees, preferably by at least 2.5 degrees, more preferably by at least 4.5 degrees, in particular wherein the handle is returned to this (vertical) position by an internal force.

[0032] Actuating the handle brings the kinematic chain to a stop in the direction of movement, e.g., towards a functional position, particularly the closed position, thus eliminating any play in that direction. Once the end position is reached, the full play of the kinematic chain in the opposite direction exists as a dead zone / reversal range or backlash. This means the handle can be moved in the opposite direction by this amount of play without actuating the push rod before the force on the push rod takes effect, and then it comes to a straight position. This return movement can be achieved by applying force within the handle, for example, by a spring-loaded ball that is pressed into a detent recess.

[0033] In a preferred first embodiment, the invention provides that the gear, or in particular only the gear, is replaced with a replacement gear, and that, compared to the (original) gear, particularly in the direction of action from the drive to the handle, the angular distance between the first tooth flank interacting with the rack, in particular the first tooth, and the last tooth flank interacting with the rack, in particular the last tooth, is increased compared to the angular distance in the original gear, in particular by a predetermined angular difference. This increased angular distance results in the modified gear ratio of the value according to the invention or preferred value.

[0034] In this embodiment, a preferred design may provide that the pitch angle between adjacent teeth of the replacement gear is chosen to be the same and larger than the pitch angle between the teeth of the (original) gear, in particular so that the predetermined angle difference is evenly distributed among all teeth of the replacement gear. In this embodiment, the transmission has the same increased gear ratio in every possible rotational position of the handle or transmission position.

[0035] In another possible embodiment, the pitch angle between the last tooth (effective in the direction from the drive to the handle) and the penultimate tooth (particularly in the direction from the tilted position to the closed position and / or vice versa) is chosen to be larger than that of the original gear, and the pitch angles between the remaining teeth of the replacement gear are chosen to correspond to the pitch angle between the teeth of the original gear. In this embodiment, the transmission (particularly in the direction from the tilted position to the closed position and / or vice versa) operates only between the last and penultimate teeth compared to the transmission before the replacement or compared to a conventional transmission with an increased gear ratio, while the remaining teeth operate with the previous / conventional gear ratio.On average, this results in one of the possible gear ratios named according to the invention, in particular from greater than 5 degrees to 1 mm to greater than 5.35 degrees to 1 mm.

[0036] Preferably, it is provided that on at least one tooth, preferably on all teeth of the replacement gear in the area of ​​the tip circle diameter, in particular at the transition from the tip surface to the tooth flank, on the leading, in particular also on the lagging tooth flank, a removal, in particular a chamfer or a radius, is arranged, in particular a larger removal than on the gear.

[0037] Such material removal is preferably provided for at least one or more / all of the teeth where the pitch angle is changed compared to the gear typically found in the transmission. The term "material removal" does not necessarily imply that material has been removed compared to a previous state. It is also intended that the gear teeth were directly shaped by material removal, e.g., by casting, cutting, or stamping.

[0038] Furthermore, the invention preferably provides that at least one tooth, preferably all teeth of the replacement gear, is / are designed with a smaller and / or larger tooth width than the teeth of the gear.

[0039] Preferably, when comparing the tooth width, the extent of the teeth of the replacement gear and the gear in the circumferential direction around the axis of rotation of the gear is considered at the same radial distance from the axis of rotation, particularly at the position of the pitch circle diameter. Here, too, such a change in tooth width is preferably provided at least for the one or more / all teeth where the pitch angle is changed compared to the gear normally present in the transmission.

[0040] Due to the removal of material and / or the changed tooth width (viewed in the direction of rotation of the gear), a smoother insertion of the tooth heads into the corresponding recesses of the rack is achieved, despite at least partially increased pitch angles between the teeth.

[0041] In another second embodiment, the invention provides that the rack, in particular only the rack, is replaced with a replacement rack and that, in the replacement rack, compared to the rack, in particular considered in the direction of action from the drive to the handle, the distance considered in linear extension between the first recess flank interacting with the gear, in particular the first recess, and the last recess flank interacting with the gear, in particular the last recess, is reduced, in particular by a predetermined difference in distance.

[0042] For example, it can be provided that the distance between adjacent recesses on the replacement rack is chosen to be the same size and smaller than the distance between the recesses of the rack itself, in particular so that the predetermined difference in distance is evenly distributed among all recesses of the replacement rack. In this design, the gearbox has the same increased gear ratio in every possible rotational angle position of the handle or gearbox position.

[0043] In another embodiment, it is provided that in the replacement rack, the distance between the last recess effective in the direction of action from the drive to the handle and the penultimate recess is chosen to be smaller than in the rack, and the distances between the remaining recesses of the replacement rack are chosen according to the distance between the recesses of the rack.

[0044] In this embodiment, the gear mechanism (particularly in one direction from the tilted position to the closed position and / or vice versa) operates only between the last and penultimate recesses compared to the gear mechanism before the replacement or compared to a conventional gear mechanism with an increased gear ratio, whereas between the remaining recesses it operates with the previous / conventional gear ratio. On average, this results in one of the possible gear ratios named according to the invention, in particular from greater than 5 degrees to 1 mm up to greater than 5.35 degrees to 1 mm.

[0045] A preferred embodiment provides that at least one recess, in particular all recesses of the replacement rack, has a reduction, in particular a chamfer or radius, on the leading and especially also on the trailing recess flank, and in particular a larger reduction than on the rack itself. Here, too, the term "reduction" should not necessarily imply that material has been removed compared to a previous state. It is also provided that the rack was directly pre-formed with a reduction at the recesses, e.g., by casting, cutting, or stamping.

[0046] Here too, such a removal at a recess is preferably provided at least for one or more / all removals in which the distance is changed compared to the rack usually present in the gearbox.

[0047] The removal of material allows the tooth heads to be inserted more easily into the corresponding recesses of the rack, despite the reduced distances between the recesses in at least some areas.

[0048] The invention can preferably also provide for replacing both the gear and the rack, or for designing them in an initial manufacturing process such that a transmission with an increased gear ratio is achieved compared to the usual ratio of 1 mm to 5 degrees of rotation. Modifying both transmission elements has the advantage that the necessary modification can be distributed between both elements and thus be smaller for both than if only one element were modified.

[0049] In the method according to the invention, it is preferably further provided that, depending on the design, in particular the manufacturer-specific design of a gear element in the window's gearbox, a suitable replacement gear element is selected from a group of replacement gear elements with different design features. A drive manufacturer can thus, for example, stock gear elements for various gearbox manufacturers in a group of gear elements and select the appropriate replacement element from the group for a replacement.

[0050] The invention is described in more detail below with reference to the figures.

[0051] The Figure 1Figure 1 shows a closed mechanism for a window. This mechanism converts a rotary motion of gear 1 into a linear stroke, or a push motion of the rack, and vice versa. The gear ratio, common in the European market, is chosen such that a 5-degree rotation translates into a 1 mm stroke. The applicants have determined that when using a drive acting on the push rod, the handle does not rotate sufficiently to be in the desired position at the end of the push motion.

[0052] After removing the gearbox covers 3 and 4, the gear 1 and the rack 2 are accessible. Figure 2Figure 1 shows these two cooperating gear elements, with the teeth of gear 1 engaging in recesses 2a of rack 2. According to the invention, one or both of these gear elements 1, 2 are replaced in an existing gearbox to achieve an increased (at least average) gear ratio of 1 mm to ≥ 5 degrees, preferably 1 mm to ≥ 5.1 degrees, more preferably 1 mm to ≥ 5.25 degrees, and more preferably 1 mm to ≥ 5.35 degrees. Alternatively, a gearbox with such a gear ratio is originally manufactured.

[0053] The Figure 3Figure 1 shows a comparison between the original gear 1, represented by a solid line, and the replaced gear 1, represented by a dashed line, in a situation where the rack 2 is driven by a drive (not shown here). The gear is depicted in a rotational position where only the last teeth engaging with the rack are visible. The superimposed representation of the two gears 1 shows that the pitch angle, i.e., the angular distance between adjacent teeth, is only greater between the last and penultimate teeth 1a and 1b than between the other teeth, which lie exactly on top of each other in the superimposed representation.This results in a larger angular distance between the first flank of the first (not visible here) tooth (1a) interacting with the rack and the last flank of the last tooth (1a) interacting with the rack than in the original gear. The average gear ratio is therefore increased compared to the original gear, although the actual ratio remains the same for the majority of the teeth.

[0054] The Figure 4 Another embodiment is shown in which, to achieve the increased gear ratio, the increase in the angular spacing provided between the first and last effective flank is distributed over all teeth, meaning that the pitch angle is the same for all teeth and is larger than in the original gear, which in the Figure 4 which is again represented by a solid line.

[0055] In the Figure 4The solid line L1 (standard gear) and the dashed line L2 (replacement gear) further illustrate that the replacement results in an increased angular distance at the last meshing tooth flank. This angular distance is preferably greater than 1.5 degrees, particularly greater than 2.5 degrees, and preferably greater than 4.5 degrees.

[0056] Especially the Figure 4 further shows that the teeth of the replacement gear (dashed line) may have a removal 1c in the area of ​​the tooth head, here as a chamfer, which is not present in the original gear (solid line) or at least less pronounced.

[0057] The Figure 5Figure 1 shows an embodiment in which the gear ratio is changed at rack 2. The gear itself remains the same. To increase the gear ratio, rack 2 is replaced with rack 2', in which the distance between the recesses of the rack is reduced; in this case, the distance is the same for all recesses. The distance ranges are shown hatched.

Claims

1. Method for correcting the handle position, in particular in at least one of at least two operating positions, of a manually and motor-operated window, a. which has a handle whose manual rotation is translated by means of a transmission into a pushing motion of a push rod having at least one locking element, wherein the transmission comprises as translating transmission elements at least a gear connected to the handle and a rack meshing with the gear and connected to the push rod, and b. which has a drive by which, in active operation, the push rod is pushed by applying force to a push rod located in a fitting groove of the sash frame and the handle is rotated indirectly via the transmission. characterized by the fact thatc. in the transmission at least one of the translating transmission elements is replaced with a replacement element and thereby the transmission with the at least one replacement element achieves a higher transmission ratio.

2. Method according to claim 1, characterized by the fact that The exchange achieves such an increase in the translation that the angular misalignment of the handle corresponding to a movement error in the kinematic chain between drive and handle is at least compensated for, and in particular overcompensated for.

3. Method according to any one of the preceding claims, characterized by the fact thatan increase in the translation by 2% to 20%, preferably by 5% to 15%, more preferably by 5% to 9% of the original translation is achieved and / or an increase in the translation is achieved according to the fact that, during the movement of the push rod by the drive between two maximally spaced functional positions of the window, in particular from the tilt position to the closed position of the window, the handle has a rotation angle of greater than 183 degrees, preferably greater than 185 degrees, more preferably 189 degrees and in particular less than 216 degrees, in particular less than 207 degrees, due to the gear ratio.

4. Method according to any of the preceding claims, characterized by the fact thatthe gear, in particular only the gear, is replaced with a replacement gear and, in the case of the replacement gear, compared to the gear, in particular considered in the direction of action from the drive to the handle, the angular distance between the first tooth flank interacting with the rack, in particular the first tooth, and the last tooth flank interacting with the rack, in particular the last tooth, is increased, in particular by a predetermined angular difference amount.

5. Method according to claim 4, characterized by the fact thatIn the case of the replacement gear, a. the pitch angle between adjacent teeth is chosen to be the same size and larger than the pitch angle between the teeth of the gear, in particular whereby the predetermined angle difference is evenly distributed between all teeth of the replacement gear, or b. the pitch angle between the last tooth effective in the direction of action from the drive to the handle and the penultimate tooth is chosen to be larger than in the gear and the pitch angles between the remaining teeth of the replacement gear are chosen according to the pitch angle between the teeth of the gear.

6. Method according to one of the preceding claims 4 or 5, characterized by the fact thata removal, in particular a chamfer or a radius, is arranged on at least one tooth, preferably all teeth of the replacement gear in the area of ​​the tip circle diameter, in particular at the transition from the tip surface to the tooth flank, on the leading, in particular also on the lagging tooth flank, in particular a larger removal than on the gear.

7. Method according to any one of the preceding claims 4 to 6, characterized by the fact that at least one tooth, preferably all teeth of the replacement gear, is / are designed with a smaller tooth width than the teeth of the gear.

8. Method according to any of the preceding claims, characterized by the fact thatthe rack, in particular only the rack, is replaced with a replacement rack and, in the case of the replacement rack, the distance considered in linear extension between the first recess flank interacting with the gear, in particular the first recess, and the last recess flank interacting with the gear, in particular the last recess, is reduced in comparison to the rack in the direction of action from the drive to the handle, in particular by a predetermined distance difference amount.

9. Method according to claim 8, characterized by the fact thatIn the case of the replacement rack, a. the distance between adjacent recesses is chosen to be the same size and larger than the distance between the recesses of the rack, in particular whereby the predetermined difference in distance is evenly distributed between all recesses of the replacement rack, or b. the distance between the last recess effective in the direction of action from the drive to the handle and the penultimate recess is chosen to be smaller than in the rack and the distances between the remaining recesses of the replacement rack are chosen according to the distance between the recesses of the rack.

10. Method according to one of the preceding claims 8 or 9, characterized by the fact thatat least one recess, preferably all recesses of the replacement rack, on the leading, and especially also on the lagging recess flank, a removal, in particular a chamfer or a radius, is arranged, in particular a larger removal than on the rack.

11. Method according to any of the preceding claims, characterized by the fact that Depending on the design, in particular the manufacturer-specific design of a gear element in the window's gearbox, a suitable replacement gear element is selected from a group of replacement gear elements with different design features.

12. Window comprising a. a frame and a sash, wherein the sash can be adjusted relative to the frame in at least two functional positions, b. a handle, the manual rotation of which is translated by means of a gear mechanism into a sliding movement of a push rod having at least one locking element, wherein the gear mechanism comprises as translating gear elements at least a gear connected to the handle and a rack meshing with the gear and connected to the push rod, and c. a drive mechanism by which, in active operation, the push rod can be moved by applying force to a push rod located in a hardware groove of the sash, and the handle can be rotated indirectly via the gear mechanism. characterized by the fact thatd. the gear ratio between two functional positions is greater than 5.0 degrees per 1 millimeter stroke of the push rod, in particular greater than 5.1 degrees per 1 millimeter stroke of the push rod, in particular greater than 5.25 degrees per 1 millimeter stroke of the push rod, and more preferably greater than 5.35 degrees per 1 millimeter stroke of the push rod.

13. Window according to claim 12, characterized by the fact that The handle, when manually operated in a functional position at the end of the actuation path, in particular in the closed position and / or in the tilt position, can be rotated beyond a position in which the handle is vertically aligned, in particular by at least 1.5 degrees, preferably by at least 2.5 degrees, more preferably by at least 4.5 degrees, in particular wherein the handle is returned to this position by an internal force application.

14. Set comprising a window drive for installation in the frame of a window, with which, after its installation, a window according to the preamble of claim 1 is obtained, and a replacement gear element, in particular selected from a group of replacement gear elements with different design features, wherein by carrying out the replacement of the gear element in the gearbox of the window by means of the replacement gear element a method according to one of the preceding claims 1 to 11 is carried out or a window according to one of claims 12 to 14 is obtained.

Images