Kit for operating lever of casement window

Abstract

The invention provides a kit of two asymmetric operating levers (9a, 9b) for mounting on a secondary sash of a casement window. The operating levers are respectively coupleable with the slidable upper and lower window latches, whereby, in a state of being mounted to the sub-sash, the set of operating levers are respectively coupled with the slidable upper and lower window latches, and the operating lever connected to the upper window latch and the operating lever connected to the lower window latch are arranged in a mirroring manner.

Description

Technical Field

[0001] The invention relates to accessories for casement windows. Background Art

[0002] Typically, a standard window comprises a fixed window frame and a sash, which is rotatably mounted on the opposite side of the handle about a vertical axis and / or can be tilted about a horizontal axis. For this purpose, a window fitting is provided, which comprises a sash part mounted on the window sash and a frame part complementary to the sash part mounted on the fixed window frame of the window. The fitting on the window sash is provided with a handle mechanism for operating the fitting by rotating the handle from a vertical closed position facing downwards when the window is closed, to a horizontal position corresponding to the rotation or tilt position, and then to an upward vertical position corresponding to the remaining rotation or tilt position (if provided).

[0003] As is well known, the handle mechanism converts the rotational movement of the handle into a translational movement of the sliding slats and / or window latches of the window sash accessories, which are slidably mounted in the accessory grooves provided for this purpose along the contour of the window sash. The sliding slats and / or window latches are, for example, provided with locking cams. When the handle is rotated to the closed position, the locking cams can be hooked into or behind the locking pieces on the window frame, thereby closing the window at multiple points, ensuring that the window is more securely closed and anti-theft.

[0004] In addition to the standard windows described above, there are also so-called casement windows. A casement window is a double-hung window having a fixed sash and two sashes that can be opened by rotating at least about parallel axes near the edge of the sash and that meet and connect at the sash opening. In other words, there is no fixed sash portion between the two sashes, so that in the fully opened state, the surface of the window opening is practically equal to the combined surface of the two sashes. The sash of the casement window that is opened first is called the primary sash. The other sash is called the secondary sash.

[0005] If two standard sashes are used as the primary and secondary sashes of a casement window, the closure between the primary and secondary sashes when the sashes meet in the closed state may often be inadequate. The two opposing mullions are virtually identical and not complementary to each other.

[0006] A known solution is to replace the profile of the secondary sash in the closed position adjacent to the main sash with a suitable profile (the so-called casement window profile) which is complementary to the relative mullion of the main sash and thus achieves a better connection between the main and secondary sashes. In this case, the fixed locking piece for closing the main sash and the sliding fitting for closing the secondary sash are mounted in the same fitting groove.

[0007] Another known solution is to keep the profile of the secondary sash in the closed state near the primary sash, but to attach an alternate profile to it to obtain a better connection between the primary and secondary sashes. In this case, two fitting grooves can be provided for the fittings. The lower fitting groove on the sash profile for sliding fittings is similar to the standard fittings of the primary sash, and the other fitting groove on the alternate profile is used to fix fitting elements, such as locks, latches and levers.

[0008] The main sash of a casement window can be operated with a handle and an associated handle mechanism in a similar manner to a standard window with a single sash. To operate the secondary sash, one or several operating levers are required, which are provided with associated operating mechanisms and are mounted in fitting recesses of the profile of the secondary sash which in the closed state is located near the main sash, for example in the casement window profile or in an alternating profile. The operating lever with the operating mechanism is thereby executed so that in the closed state of the casement window, said operating lever is located between the adjacent profiles of the main and secondary sashes and is therefore not visible. Summary of the invention

[0009] The present invention more particularly relates to an operating lever for operating a secondary sash of a casement window.

[0010] An object of the present invention is to provide a set of operating levers for operating the auxiliary sash of a casement window, which can be used for both the auxiliary sash opened to the right and the auxiliary sash opened to the left.

[0011] Another object of the present invention is to provide a kit for operating an operating lever for a secondary sash of a casement window in order to prevent theft or at least make theft more difficult.

[0012] Another object of the present invention is to provide a kit of operating levers for operating auxiliary sashes of casement windows, which operating levers are easy to use and suitable for casement window profiles and alternating profiles.

[0013] In order to at least partially achieve one or more of the above-mentioned purposes, one aspect of the present invention relates to a kit of two operating levers for installation on a secondary window sash of a casement window. It is characterized in that each operating lever in the kit comprises a rectangular body, an operating arm hinged to the rectangular body at one end, a sliding element, and a connecting arm hinged to the sliding element at one end and hinged to the operating arm at the other end, whereby each operating lever is configured to convert the rotation of the operating arm into the translation of the sliding element, and the operating levers are respectively capable of being connected to a slidable upper window latch and a lower window latch, whereby, in a state of being installed on the secondary window sash, the operating levers are respectively connected to the slidable upper window latch and the lower window latch, and the operating lever connected to the upper window latch is configured in a mirrored manner with the operating lever connected to the lower window latch.

[0014] An advantage associated with the fact that the set of operating levers is executed in a mirror-image manner is that the set is suitable both for left-hand and for right-hand embodiments of secondary sashes.

[0015] The rectangular body of the operating lever is provided with upright ribs near the longitudinal sides. The upright ribs protrude at least partially from the aforementioned longitudinal sides. In the closed state of the operating lever, the upright ribs serve as stops for the operating arm. This makes it easier for the user to operate, because the operating lever can be easily placed in the closed position by pulling or pushing the operating arm against the stop. In order to further improve the convenience of operation, the operating arm can be provided with a recess at its free end, in which one or more fingertips can be at least partially placed to rotate the operating arm. The ribs can also prevent the lever from being operated from the outside in the case of attempted burglary. Due to the presence of the ribs, the lever cannot be pulled. Since the main window sash is closed, the lever cannot be pushed. Optionally, an upright rib can be additionally provided on the end face of the rectangular body of the operating lever, which extends at least partially along the aforementioned end face and restricts the operating arm in the closed state. One advantage of this is that in the case of attempted burglary, forcible access to the operating arm from the outside through the end face is also prevented.

[0016] In another embodiment, the rectangular body of the operating arm is provided with a threaded hole for mounting the operating lever on the window sash, whereby the threaded hole forms a fine area, which is located between the hinge point of the operating arm and the sliding element in the closed state of the operating lever. Preferably, the size and position of the connecting arm and the operating arm are aligned with the position of the threaded hole, so that the threaded hole is only accessible in the open state of the operating lever. Usually, the operating lever is installed so that the operating lever opens inwards. In addition, the threaded hole can only be accessed in the open state, which improves the anti-theft performance of the window. In addition, the operating arm can be provided with a recess on the side, preferably on the side facing inwards in the installed state, through which a screw can be installed or removed respectively in the closed state in order to mount the operating lever on the window sash or remove the operating lever from the window sash.

[0017] In another embodiment, the operating lever is configured so that in a closed state, the hinge connection between the connecting arm and the operating arm is not located on an imaginary straight line connecting the hinge connection between the operating arm and the rectangular body and the hinge connection between the connecting arm and the sliding element.

[0018] Preferably, the operating lever is configured so that in the closed state, the shortest distance from the hinge connection between the connecting arm and the operating arm to the upright rib is smaller than the shortest distance from the hinge connection between the operating arm and the rectangular body to the upright rib, and is also smaller than the shortest distance from the hinge connection between the connecting arm and the sliding element to the upright rib.

[0019] On the other hand, the present invention relates to a casement window accessory for installation on a passive window sash of a casement window, wherein the casement window accessory comprises an upper window latch, a lower window latch and a kit of two operating levers according to one of the aforementioned embodiments or any combination thereof, and wherein, in the installed state of the casement window accessory, the sliding element of the first operating lever is connected to the slidable lower window latch, and the sliding element of the second operating lever is connected to the slidable upper window latch.

[0020] In one embodiment, both the lower window latch and the upper window latch of the casement window accessory are provided with a window latch locking member, which cooperates with the locking cam on the window sash accessory of the main window sash to ensure a secure closure. In addition, the lower window latch of the casement window accessory can be provided with a cam, which cooperates with the cam on the lower window latch of the main window sash, and these cams are combined with each other, and in a specific operating position of the handle of the main window sash, it is possible to tilt the main window sash.

[0021] In another embodiment, both the lower window latch and the upper window latch of the casement window accessory are provided with a scale for determining the installation position of the corresponding operating lever when installing the casement window accessory.

[0022] In another aspect, the present invention relates to a casement window, comprising a secondary sash and a casement window accessory according to one of the aforementioned embodiments or any combination thereof, wherein the casement window accessory is mounted in a accessory groove of the sash. Alternatively, the casement window comprises a secondary sash and a casement window accessory according to one of the aforementioned embodiments or any combination thereof, an alternating profile is attached to the secondary sash, and the casement window accessory is mounted in the accessory groove of the alternating profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to better illustrate the features of the present invention, a preferred embodiment of a set of operating levers for auxiliary sashes of a casement window and a casement window accessory including the set of operating levers according to the present invention will be described below by way of example with reference to the accompanying drawings without any limitation, wherein:

[0024] Figure 1 Schematically shows an embodiment of a fitting for a secondary sash of a casement window according to the invention, to which alternating profiles are attached;

[0025] Figure 2 Drawn on a larger scale and shown in cross section in the plane of symmetry of the fitting recess Figure 1 The component denoted by F1 in the example, but in the installed state on the secondary sash of a casement window with an alternating profile;

[0026] Figure 3 Schematically showing a horizontal cross-sectional view of a bridge of vertical profiles of a secondary sash with alternating profiles, on which a fitting is mounted, according to an embodiment of the invention;

[0027] Figure 4 schematically illustrates an example perspective view of a portion of a fitting for mounting on a main sash of a casement window;

[0028] Figure 5 Schematically showing a perspective view of a bridge latch and a bridge piece accessory according to an embodiment of the present invention;

[0029] Figure 6 A perspective view schematically shows a casement window latch accessory according to an embodiment of the present invention;

[0030] Figure 7 Schematically shows a top view of an operating lever in an open state according to an embodiment of the present invention, the operating lever being used to be installed in a fitting groove of an auxiliary sash or an alternating profile on a casement window;

[0031] Figure 8 Schematically shows a top view of an operating lever installed in a fitting groove of a secondary sash of a casement window in a closed state according to an embodiment of the present invention;

[0032] Fig. 9 A schematic top view of a cross section of a vertical profile of a secondary window sash is shown, the secondary window sash having a Figure 8 Alternate profiles shown with operating levers mounted;

[0033] Fig.10 A perspective view of a kit of operating levers in an open state according to an embodiment of the present invention is schematically shown, wherein the operating lever is used to be installed in a fitting groove of a secondary sash of a casement window. DETAILED DESCRIPTION

[0034] Figures 1 to 3 The fitting shown in is a fitting for the auxiliary sash of a casement window, on which an alternating profile is attached. The auxiliary sash (with the alternating profile) is rotatably connected around a vertical axis close to one side of the fixed window frame of the casement window.

[0035] The accessories shown include a sash accessory 2 for installation on the auxiliary window sash and a casement window accessory for installation on the alternating profile. In the installed state, the sash accessory 2 cooperates with a part of the accessories installed on the fixed window frame (i.e., the window frame accessory). In the installed state, the casement window accessory 1 cooperates with the window frame accessory and the sash accessory 3 of the main window sash, such as Figure 4 Part shown.

[0036] To operate the secondary sashes, the casement window fitting 1 provides two operating levers 9a, 9b mounted in the fitting groove 8 of the alternating profile 4. The operating levers are provided with a mechanism that converts the rotation of the operating arm 34 into a translation of the casement window latch, which is connected to the operating levers and slidably mounted in the fitting groove 8 of the alternating profile 4. Figures 1 to 3The fitting shown in the figure shows the closed state of the secondary sash. The operating levers 9a, 9b are also shown in the closed state, the operating arms being substantially parallel to the fitting grooves 8 of the alternating profile 4 on which the operating levers 9a, 9b are mounted. In the closed state, the latching points 11 of the casement window latches 10a, 10b engage with the sash locks 12, which are complementarily mounted on the fixed sash of the casement window. After release, the secondary sash can be opened by respectively rotating the operating arm of the upper operating lever 9a to the open position, so that the upper casement window latch 10a slides downwards in the fitting grooves 8 of the alternating profile, so that its latching point 11 leaves the complementary sash lock 12, and rotating the operating arm of the lower operating lever 9b to the open position, so that the lower casement window latch 10b slides upwards in the fitting grooves 8 of the alternating profile, so that its latching point 11 leaves the complementary sash lock 12.

[0037] In addition, the casement window latches 10a, 10b (the upper casement window latch is Figure 6 A window latch locking member 13 is provided (enlarged in FIG. 1 ) which cooperates with a locking cam 14 of the window sash fitting 3 of the main window sash.

[0038] Window sash accessories 3 in the main window sash Figure 4 The window sash fitting 3 of the main window sash is provided with an operating mechanism with an operating handle (not shown) for closing the window and capable of bringing the main window sash from a closed position to a rotated position and, if applicable, also to a tilted position. The operating mechanism of the operating handle converts the rotational movement of the operating handle into a translational movement of a sliding component, such as a sliding slat 17 and / or a window latch 15 and / or an angular transmission 16 of the window sash fitting, which are slidably mounted in a fitting recess provided for this purpose along the contour of the main window sash.

[0039] exist Figure 4In the embodiment shown, the main sash fitting 3 in the mounted state is arranged in a fitting groove on the vertical profile of the main sash, which is arranged on the side connected to the secondary sash, and the main sash fitting 3 is provided with a coupling latch 15, which is slidably connected to the operating handle at one end, possibly via an intermediate sliding part (such as a sliding slat), and is connected to an angle transmission 16 at the other end. Typically, the angle transmission 16 is connected to a sliding slat and / or a latch, which is slidably applied in a fitting groove on the outer contour of the main sash arranged for this purpose on the horizontal profile. The sliding slat or the latch can be provided with a locking cam, which moves and can be hooked into or behind a sash lock on the sash when the operating handle is rotated into the closed position. A locking cam 14 is also provided on the coupling latch 15, which moves and can be hooked into or behind a complementary latch lock 13 of the casement window fitting 1 when the operating handle is rotated into the closed position. In this way, closing of the main sash is achieved not only at multiple points along the window frame, but also at multiple points between the main sash and the auxiliary sash, thereby ensuring that the window is more securely closed and burglar-proof. Another advantage is that the sash fittings 3 of the main sash of the casement window are essentially no different from the sash fittings of a standard window with a single sash.

[0040] If the secondary sash with alternating profiles were provided with fittings only in the alternating profiles, there would be room for improvement in the closing of the secondary sash from a theft protection point of view, since the closing would be limited to the latching point 11 of the casement window latch 10a, 10b hooked in the sash lock 12. However, for sashes with compact dimensions and a basic level of theft protection, this may be sufficient.

[0041] However, for example Figures 1 to 3 As shown, and described further below, the fitting for a secondary sash with alternating profiles also comprises a sash fitting 2, and the solution shown comprises means enabling said sash fitting 2 to be operated by an operating lever 9a, 9b.

[0042] The sash fitting 2 for the secondary sash comprises sliding parts, such as sliding slats 17 and / or latches, which are slidably applied in sash fitting grooves 7, which are located on the outer contour of the secondary sash on the horizontal profile. The angle gears 16 applied in the sash fitting grooves 7 are connected to the sliding parts in the horizontal sash fitting grooves at the top and underside of the secondary sash and are slidably connected to the bridging latches 18 applied in the sash fitting grooves 7 for the secondary sash, which are located on the outer contour of the secondary sash on the vertical sash profile 5 to which the alternating profile 4 is also connected or to be connected.

[0043] Typically, the corner transmission comprises a corner piece in which the spring assembly is slidably applied and forms a connection between a sliding slat 17 on one side of the corner or a coupling latch on both sides of the corner. Figure 1 and Figure 2 The angle transmission device shown as an example in the description is described in the patent application EP22212424.0 with an application date of December 9, 2022. The content of EP22212424.0 is considered to be fully included in the description by this reference. The angle transmission device shown consists of an angular housing with a first leg and a second leg. The housing consists of a symmetrical left half and a right half, in which a guide is provided in the form of a groove with a spring assembly therein, which can slide on the corner, and one end of the spring assembly is connected to the moving leg of the corner piece that can slide in the second leg, and the other end is used to connect with the bridging window latch 18. The second leg is provided with transversely extending ribs, with which the second leg of the corner piece can slide into the groove of the window sash fitting, and then slide to the position where the first leg falls into the adjacent fitting groove.

[0044] The bridging latch 18 is provided with a transversely extending rib 19 with which it can slide in the vertical sash fitting groove 7, and a recess 21 with an upright peripheral edge 23. Threaded holes 22 are provided at two opposite ends of the recess 21.

[0045] Optionally, before installation, the bridge latch 18 may already be provided with a fixing 20 snapped onto it. When the bridge latch 18 reaches the fixed position, the fixing will first snap onto the corner piece or the auxiliary window sash. The fixed position is a predetermined position in the travel of the bridge latch, which is achieved by moving the bridge latch. Preferably, when the bridge latch 18 is in the fixed position, the fixing 20 is close to the corner. The fixed position may coincide with the end of the travel of the connecting window latch. When leaving the fixed position, the fixing is disengaged from the bridge latch and remains near the corner, where it performs its fixing function.

[0046] In the installed state, the bridging window latch 18 is slidably applied in the vertical sash fitting groove 7, and the casement window latches 10a, 10b are slidably applied in the vertical fitting groove 8 of the alternating profile. In the embodiment shown, the vertical fitting groove 8 and the vertical sash fitting groove 7 of the alternating profile are actually placed in parallel and overlapped with each other, and the opening of each of the vertical fitting groove 8 and the vertical sash fitting groove 7 is oriented outward in the same direction, whereby the distance between the top of the vertical fitting groove 8 of the alternating profile and the bottom of the vertical sash fitting groove 7 is 1 / 4 of the vertical sash fitting groove 7. Figure 3 Indicated by X.

[0047] The upper casement window latch 10a and the lower casement window latch 10b are connected to the upper bridge latch and the lower bridge latch 18, respectively. To this end, two slots 6 are milled near the ends of the vertical fitting groove 8 of the alternating profile 4. In the hollow space of the alternating profile 4, a bridge 26 is arranged at the level of each groove 6, for example Figure 5 The bridge piece 26 is shown in the disassembled state in FIG. The extension 24 of the bridge piece is applied in the recess 21 of the corresponding bridge window latch 18 provided for this purpose, with its stop 25a abutting against the upper side of the upright peripheral edge 23 of the recess. Each bridge piece 26 is connected to the associated bridge window latch 18 by screwing two round head screws 28 through the screw openings 27 in the threaded holes 22. Alternatively, only one threaded hole 22 and the associated screw openings 27 may be provided, or a plurality of threaded holes 22 and the associated screw openings 27 may be provided and used in combination with round head screws 28 or other types of screws.

[0048] In the mounted state, each casement window latch 10a, 10b is connected to the associated bridge 26 using a coupling pin 29, the upper side of which is provided with a thread, by which the coupling pin 29 is screwed into a threaded hole 31 provided for this purpose for the casement window latch 10a, 10b and extends through the associated slot 6 into the channel of the bridge 26. The diameter of the threaded portion of the coupling pin 29 is greater than the diameter of the portion of the coupling pin extending in the channel, preferably but not necessarily extending into the recess 21.

[0049] The portion of the coupling pin 29 extending into the channel of the bridge 26 is free of threads, so that the coupling pin can slide in the channel in the direction of its longitudinal axis. The advantage of this construction is that the distance X between the top of the vertical fitting groove 8 of the alternating profile and the bottom of the vertical sash fitting groove 7 does not have to be fixed, but can be varied, so that in the event of deviations in the profile manufacturer's specifications, such as deviations in the dimensional specifications of the fitting groove or the alternating profile, the same components can still be used to connect between the casement window latches 10a, 10b and the bridging window latch 18. In addition, the coupling pin 29 is optionally provided with an O-ring near the end thereof which is applied or to be applied in the channel of the bridge 26. This not only simplifies the proper insertion of the coupling pin 29 into the channel, but also prevents the coupling pin 29 from making noises in the channel, for example when the bridging window latch 18 is moved. As Figure 3 As shown, not only the distance X is variable, but also the distance Y, i.e., the distance between the longitudinal centerline of the vertical sash fitting groove 7 and the longitudinal centerline of the vertical fitting groove 8 of the alternating profile 4, can be varied due to the manufacturer's choice of the fitting groove size, i.e., the distance in the direction substantially perpendicular to the centerline and the longitudinal axis of the coupling pin 29 in the installed state. An exemplary configuration to accommodate the variation of the distance Y is to form a threaded hole 27 in the bridge 26, into which a round head screw 28 is screwed, for connecting the bridge 26 into a small groove.

[0050] In the mounted state of the fitting, the coupling pin 29 is placed substantially perpendicular to the sliding direction of the casement window latches 10a, 10b and the bridging window latch 18 or the longitudinal direction of the fitting groove in which the latch is placed. This allows the connection between the casement window latches 10a, 10b and the bridging window latch 18 to be compactly realized close to the corners of the window sashes, so that there is still enough space for the proper connection of the alternating profiles 4 on the auxiliary window sashes.

[0051] In the mounted state, the coupling pin 29 screwed into the casement window latch 10a, 10b can move in the longitudinal direction of the vertical fitting groove 8 of the alternating profile 4 in the associated slot 6 in which the casement window latch is slidably applied. The slot 6 is dimensioned so that it allows the casement window latch 10a, 10b and the coupling pin to move freely over the entire stroke corresponding to the rotation of the operating mechanism from the open position to the closed position and vice versa. The movement of the casement window latch 10a, 10b is transmitted to a similar movement of the associated bridging window latch 18, which is vertically transmitted by the angular transmission 16 to a sliding part in the associated horizontal profile of the auxiliary window sash, which sliding part is provided with a locking cam 14, which slides into or behind a complementary sash locking piece 12 of the sash fitting when the operating handle of the auxiliary window sash is rotated to the closed position. Thus, due to the connection of the casement window fitting 1 with the window fitting 2 of the auxiliary window sash, closure is achieved at multiple points between the auxiliary window sash and the fixed window frame, ensuring that the window is more securely closed and burglar-proof. Another advantage is that, apart from the applicable bridging window latch, the window fitting 2 of the auxiliary window sash is essentially almost indistinguishable from the window fitting of a standard window with a single window sash.

[0052] Figure 7 An operating lever 9b is shown for mounting in a vertical fitting recess of a secondary sash of a casement window. This can be a fitting recess in a vertical profile of the secondary sash, which is located near the primary sash in the closed state of the window. The vertical profile can be a casement window profile. If an alternating profile is used, it can also be, for example, a fitting recess 8 of an alternating profile 4 of a secondary sash. Figure 7 The operating lever 9b is shown in the open state, and Figure 8 and Fig. 9The same operating lever 9b is shown in the closed state, mounted in the alternating profile 4 and connected to the lower casement window latch 10b. The operating lever 9a, 9b comprises a rectangular body 33, to which an operating arm 34 is hinged via a hinge point 35. The operating lever 9a, 9b is also provided with a sliding element 36 slidable in a fitting groove and a connecting arm 37. At one end, the connecting arm 37 is hinged to the sliding element 36 via a hinge point 38. The other end of the connecting arm 37 is hinged to the operating arm 34 via a hinge point 39. At its free end, the sliding element of the operating lever 9a, 9b is provided with teeth for coupling with complementary teeth of the casement window latch 10a, 10b.

[0053] Said configuration ensures that the rotation of the operating arm 34 is converted into a translation of the sliding element 36. To facilitate operation, the operating arm 34 is provided at its free end with a recess 42 in which one or several finger tips can be at least partially placed in order to rotate the operating arm 34 about its hinge point 35.

[0054] The rectangular body 33 is also provided with upright ribs 40 on the longitudinal sides. When the operating arm 34 is rotated to the closed position, the upright ribs 40 act as stops so that the operating arm cannot be rotated further. In other words, the lever is asymmetrically executed and can only be rotated in one direction from the closed position. In the installed state, as Figure 8 In the embodiment shown in FIG. 3 , this is only on the inside, so that the upright rib 40 is located on the outside of the operating lever 9 a, 9 b. This is easy for the operator. The upright rib 40 actually acts as a clear stop, and the operating lever 9 a, 9 b can be simply closed by pulling or pushing the operating arm 34 onto the upright rib 40.

[0055] In the illustrated embodiment of the operating levers 9a, 9b (see Fig.10 ), an upright rib is also provided at the end surface of the rectangular body 33, and when the operating lever is in the closed state, the upright rib limits the operating arm 34 at its free end.

[0056] The upright ribs 40 on the longitudinal sides of the rectangular body 33 and the upright ribs at the end faces complicate access to the delicate areas of the operating levers 9a, 9b from outside the window, which is advantageous in terms of theft prevention. In addition, if unauthorized entry is sought, the resistance to the forced rotation of the operating arm is increased by selecting the hinge points 35, 38, 39 so that in the closed state of the operating levers 9a, 9b, the hinge points are not located in a straight line. More specifically, in the closed state, the hinge point 39 between the connecting arm 37 and the operating arm 34 is not located on the imaginary straight line connecting the hinge points 35 and 38, but the hinge point 39 is located closer to the upright rib 40. Therefore, when trying to move the accessory without authorization, the lever will only be pushed more firmly to the closed position and the window will not open.

[0057] Fig.10 A set of operating levers 9a, 9b for mounting on the auxiliary sash of a casement window is shown. Figure 7 and Figure 8 As shown and described, the kit comprises an asymmetric operating lever 9b and its mirrored version, an asymmetric operating lever 9a. The two operating levers 9a, 9b can only be opened from the closed position in one direction, which direction is the same for both operating levers 9a, 9b due to the mirrored execution. Preferably, the installation on the secondary sashes of the casement window makes them only turn inwards from the closed position. The kit shown is intended for installation on the secondary sash as the left sash. However, the same kit can also be installed on the secondary sash as the right sash. However, in the latter case, the operating lever 9a is located at the bottom and the operating lever 9b is located at the top.

[0058] The installation of the casement window fitting 1 can be easily achieved. The method comprises the following steps:

[0059] Slide the operating levers 9a, 9b in the closed state into the fitting grooves of the vertical profile of the secondary sash, which is located near the main sash in the closed state of the window;

[0060] Sliding the casement window latches 10a, 10b in the fitting grooves 8 and connecting the casement window latches to the operating levers 9a, 9b;

[0061] Position the coupled casement window latches 10a, 10b and operating levers 9a, 9b in the fitting recesses using a scale 32 provided on the casement window latches and attach a press-fit screw 44 through a recess 43 in the operating arm 34;

[0062] The operating arm 34 is rotated into the open state and an additional self-tapping screw 45 is optionally screwed through the threaded hole 41 of the operating lever 9a, 9b.

[0063] The casement window fitting 1 is mounted on the alternating profile 4 and connected with the window sash fitting 2 of the auxiliary window sash, which can be easily realized. The method comprises the following steps:

[0064] On the side connecting the alternating profiles 4, slide the bridging latch 18 (optionally with a fixing 20) into the vertical sash fitting groove 7 of the secondary sash;

[0065] Slide the angle drive 16 into the horizontal and vertical sash fitting grooves 7 and connect the applied bridging latch 18 to the angle drive 16 , for example by snapping in or the like;

[0066] Place the alternating profile 4 on the secondary sash;

[0067] Slide the coupling pin 29 into the channel of the bridge 26 and position the bridge so that it passes through the slot 6 in the fitting groove 8 of the alternating profile 4 on the bridge latch 26;

[0068] Screw the round head screw 28 through the screw opening 27 in the threaded hole 22 to connect the bridge 26 to the bridge window latch 18, and then remove the coupling pin 29;

[0069] Slide the operating levers 9a, 9b in the closed state into the fitting grooves 8 of the alternating profiles 4;

[0070] Slide the casement window latches 10a, 10b into the fitting grooves 8 and couple the casement window latches to the operating levers 9a, 9b;

[0071] Position the coupled casement window latches 10a, 10b and operating levers 9a, 9b in the fitting recess 8 using a scale 32 provided on the casement window latch, and attach a press-fit screw 44 through a recess 43 in the operating arm 34;

[0072] Rotate the operating arm 34 to the open position and optionally screw in an additional self-tapping screw 45 through the threaded hole 41 of the operating lever 9a, 9b;

[0073] The coupling pin 29 is connected to the threaded hole 31 of the casement window latch 18 so that it extends through the slot 6 into the passage of the bridge 26 .

[0074] The present invention is by no means limited to the embodiments described as examples and shown in the accompanying drawings, and the set of operating levers for the casement window auxiliary sash according to the present invention and the casement window accessories according to the present invention including this set of operating levers can be realized in various forms and sizes without departing from the scope of the present invention.

Claims

1. A kit of two operating levers (9a, 9b) for mounting on the auxiliary sash of a casement window, characterized in that: Each operating lever in the kit comprises a rectangular body (33), an operating arm (34) hinged to the rectangular body at one end, a sliding element (36), and a connecting arm (37) hinged to the sliding element at one end and hinged to the operating arm at the other end, each operating lever being configured to convert the rotation of the operating arm into the translation of the sliding element, and The operating lever is respectively connectable to the slidable upper window latch and the lower window latch, so that when installed to the auxiliary window sash, the operating lever is respectively connectable to the slidable upper window latch and the lower window latch, and the operating lever connected to the upper window latch is configured in a mirrored manner with the operating lever connected to the lower window latch, and the rectangular body is provided with an upright rib (40) near the longitudinal side, and when the operating lever is in the closed state, the upright rib serves as a stopper for the operating arm.

2. The kit according to claim 1, characterized in that The rectangular body (33) is provided with a threaded hole (41), and the threaded hole (41) is used to connect the operating lever (9a, 9b) to the window sash. When the operating lever is in a closed state, the threaded hole is located between the hinge point (35) of the operating arm (34) and the sliding element (36).

3. The kit according to claim 2, characterized in that The connection arm (37) and the operating arm (34) are sized and aligned so as to position the threaded hole (41) so as to be accessible only when the operating levers (9a, 9b) are in an open state.

4. A kit according to any one of the preceding claims, characterised in that The operating arm (34) is provided at its free end with a recess (42) in which one or more fingertips can be at least partially placed to rotate the operating arm.

5. A kit according to any one of the preceding claims, characterised in that The operating arm (34) is provided with a notch (43) on the side, and in the closed state, a screw (44) is installed or removed through the notch (43) to respectively install the operating lever (9a, 9b) on the window sash or remove it from the window sash.

6. A kit according to any one of the preceding claims, characterised in that When the operating lever (9a, 9b) is in the closed state, the hinge connection (39) between the connecting arm (37) and the operating arm (34) is not located on the imaginary straight line connecting the hinge connection (35) between the operating arm and the rectangular body (33) and the hinge connection (38) between the connecting arm and the sliding element (36).

7. A kit according to any one of the preceding claims, characterised in that When the operating lever (9a, 9b) is in the closed state, the shortest distance from the hinge connection (39) between the connecting arm (37) and the operating arm (34) to the upright rib (40) is smaller than the shortest distance from the hinge connection (35) between the operating arm and the rectangular body (33) to the upright rib, and is also smaller than the shortest distance from the hinge connection (38) between the connecting arm and the sliding element (36) to the upright rib.

8. A kit according to any one of the preceding claims, characterised in that The rectangular body (33) of the operating lever (9a, 9b) is provided with an upright rib at the end surface, the upright rib at least partially extending along the end surface, and in the closed state of the operating lever, the upright rib restricts the operating arm (34).

9. A casement window accessory (1) for installation on a secondary sash of a casement window, wherein: The casement window accessory comprises an upper window latch, a lower window latch and a set of two operating levers (9a, 9b) according to any one of the preceding claims, and wherein, in the installed state of the casement window accessory, the sliding element of the first operating lever is connected to the slidable lower window latch, and the sliding element of the second operating lever is connected to the slidable upper window latch.

10. The casement window accessory according to claim 9, characterized in that: The lower window latch and the upper window latch are both provided with a window latch locking piece (13).

11. The casement window accessory according to claim 9 or 10, characterized in that: The lower window latch and the upper window latch are both provided with a scale (32) for determining the installation position of the corresponding operating lever when installing the casement window accessory.

12. A casement window comprising an auxiliary window sash and a casement window accessory according to any one of claims 9 to 11, wherein: The casement window accessories are installed in the accessory groove (7) of the window sash.

13. A casement window comprising a secondary sash and a casement window fitting according to any one of claims 9 to 11, an alternating profile (4) being attached to the secondary sash, and the casement window fitting being mounted in a fitting groove (8) of the alternating profile.

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