Polystyrene

Description

[0001] The invention relates to a polygonal pin for a window fitting of a window locking system according to the preamble of claim 1. The invention also relates to a device for a window fitting of a window locking system with the polygonal pin.

[0002] A window locking system typically comprises a window mechanism and a window fitting. The window mechanism comprises all components installed in the window, such as a window gear, and the window fitting comprises all components that can be connected to the window mechanism from the outside, such as a window handle, a window locking element, and a polygonal spindle. The aim is to make the window fitting mountable on different windows with different window mechanisms. In the window locking system, the window gear is connected to the window handle via the polygonal spindle in a rotationally fixed manner. When the window handle is operated, the polygonal spindle rotates in the window locking element and actuates the window gear. The window can be adjusted accordingly—i.e., opened or closed. The polygonal spindle is latchingly received in the window locking element and engages through a window frame.The length of the polygonal spindle varies depending on the design of the window frame and the window mechanism's gear. Therefore, a suitable polygonal spindle must always be selected and installed when installing the window fitting to the window mechanism. This results in additional installation work.

[0003] EP 3 156 564 A1 discloses a coupling pin for drivingly connecting a handle to a gear, wherein the length of the coupling pin is variable along a longitudinal axis of the coupling pin.

[0004] EP 2 042 671 A2 discloses a device for securely attaching a handle actuating pin to a fastening opening of a handle using an adapter. The adapter comprises a fastening part and a receiving part that has means for axially securing the handle actuating pin.

[0005] GB 655 528 A discloses a lock shaft consisting of two interlocking, telescopically movable tubes with a square cross-section. A spring acts between the blocked end of one tube and one end of the other tube.

[0006] CN 108 104 598 A discloses a connecting rod of a lock having a lock body and a handle. The connecting rod comprises two connecting rod pieces and an elastic piece. The connecting rod pieces are movable relative to each other in the axial direction, and the elastic piece is arranged between the connecting rod pieces.

[0007] DE 10 2016 123 052 A1 discloses a handle pin for a door handle assembly with a handle follower for receiving the handle pin. The handle pin comprises a first pin element and a second pin element.

[0008] The object of the invention is therefore to provide an improved or at least alternative embodiment for a polygonal pin of the generic type, in which the described disadvantages are overcome. The object of the invention is also to provide a device with a corresponding window locking element and the polygonal pin.

[0009] This object is achieved according to the invention by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims.

[0010] The polygonal pin according to the invention is provided or designed for a window fitting of a window locking system. The polygonal pin is straight and elongated and has a longitudinal central axis. A first longitudinal end of the polygonal pin is provided or designed for rotationally fixed connection to a window gear, and a second longitudinal end of the polygonal pin is provided or designed for rotationally fixed connection to a window handle. According to the invention, the polygonal pin has a first partial pin forming the first longitudinal end and a second partial pin forming the second longitudinal end. The two partial pins are connected to one another in an axially displaceable manner, and as a result, an axial length of the polygonal pin, defined by the distance between the longitudinal ends, is variable. In other words, the first partial pin can be continuously displaceable within the second partial pin. The polygonal pin is preferably a square pin with a square cross-section.

[0011] In the context of the present invention, the terms "axial," "radial," and "circumferential" always refer to the longitudinal center axis of the polygonal pin. The polygonal pin can, in particular, be a square pin or have a square or rectangular cross-section transverse to the longitudinal center axis. In principle, the polygonal pin can also have a different cross-section. This also applies to the first and second pins, which together form the polygonal pin. The first and second pins can be connected to one another in such a way that unwanted detachment of the first and second pins from one another is prevented.

[0012] The window locking system can comprise the window fitting and a window mechanism. The window mechanism can comprise all components installed in a window, such as a window gear, and the window fitting can comprise all components that can be connected to the window mechanism from the outside, such as a window handle and the polygonal pin according to the invention. When installing the window fitting on a window, the window mechanism or the window gear of the window mechanism can be connected to the window handle of the window fitting via the polygonal pin according to the invention. The axial length of the polygonal pin according to the invention can be adapted when installing the window fitting on the window depending on the design of its window frame and the window mechanism of the window locking system.As a result, the window fitting of the window locking system with the polygonal spindle according to the invention can be used for installation on windows with different window frames and with different window mechanisms. In other words, the polygonal spindle can be integrated with a window locking element and a window handle, regardless of the manufacturer. In particular, the polygonal spindle can be integrated into any commercially available window locking element with a complementary polygonal receptacle, preferably a square receptacle, regardless of the manufacturer, in combination with any commercially available window handle with a complementary polygonal receptacle, preferably a square receptacle. Accordingly, the installation of the window fitting can be significantly simplified. Furthermore, the inventory of the necessary differently designed polygonal spindles can be reduced.

[0013] According to the invention, one partial pin is hollow and the other partial pin is accommodated in one partial pin in a region-by-region and axially displaceable manner. An outer diameter of the other partial pin can expediently be the same as or slightly smaller than an inner diameter of one partial pin. An outer diameter of the other partial pin can correspondingly be smaller than the outer diameter of one partial pin. In particular, the other partial pin can have an outer diameter of 7 mm and the one partial pin an outer diameter of 8 mm. To change the axial length of the polygonal pin, the other partial pin can then be pushed in or out of the one partial pin. A design in which the first partial pin is accommodated in the second partial pin is preferred. However, an inverted design is also possible, in which the second partial pin is accommodated in the first partial pin.If the preferred design is explained in more detail below, this is done representatively for both embodiments and accordingly also applies analogously or adapted to the reverse design.

[0014] The pushing of the first partial pin into the second partial pin and the pushing of the first partial pin out of the second partial pin can be axially limited. Accordingly, a maximum axial length and a minimum axial length of the polygonal pin can be fixedly defined. The polygonal pin can have a first end state with a maximum axial length, wherein in the first end state the first partial pin is pushed out of the second partial pin by a maximum distance. In other words, in the first state the first partial pin can be pushed out of the second partial pin to the maximum extent. Accordingly, the polygonal pin can have a second end state with a minimum axial length, wherein in the second end state the first partial pin is pushed out of the second partial pin by a minimum distance. In other words, in the second end state the first partial pin can be pushed into the second partial pin to the maximum extent.Between the first final state and the second final state, the polygonal pin can have several intermediate states. In each intermediate state, the polygonal pin can have an axial length between the maximum length and the minimum length. The first partial pin can therefore be pushed out from the second partial pin to any distance between the maximum distance and the minimum distance.

[0015] According to the invention, the polygonal pin also has a return spring, and the return spring is accommodated in the second partial pin. In other words, the return spring can be arranged at the second longitudinal end of the polygonal pin within the second partial pin. The return spring is axially clamped between a base of the second partial pin, which is oriented transversely to the longitudinal axis, and the first partial pin. The return spring can thus act against an axial displacement of the first partial pin towards the second axial longitudinal end of the polygonal pin, or against the pushing of the first partial pin into the second partial pin, or against the reduction of the axial length of the polygonal pin. In other words, the return spring brings the polygonal pin from the second end state to the first end state, as long as it is not prevented.The return spring can, in particular, be preloaded to a maximum projection of the first partial pin from the second partial pin. For this purpose, the two partial pins of the polygonal pin can be connected to each other by means of a screw.

[0016] The polygonal pin can further comprise an axially aligned stop pin with a stop head, and the stop pin can be received in the second partial pin or arranged in the second partial pin. In other words, the stop pin can be arranged at the second longitudinal end of the polygonal pin within the second partial pin. The stop pin can be firmly connected to the first partial pin on one side and, on the other side, protrude with the stop head from a base of the second partial pin that is aligned transversely to the longitudinal axis. The stop head can engage axially behind the base of the second partial pin or strike the base of the second partial pin from the outside. The stop pin can therefore slidably connect the two partial pins to one another and prevent unwanted detachment of the two partial pins from one another. The stop pin can be arranged axially slidably together with the first partial pin in the second partial pin.The return spring can, for example, be a compression spring and arranged around the stop pin. This allows the return spring and the stop pin to be accommodated in the second pin section in a space-saving manner.

[0017] The stop pin can act against the return spring. If the stop pin hits the bottom of the second partial pin from the outside, the return spring is maximally relaxed and the polygonal pin is in the first state or has the maximum axial length. In other words, the return spring can only relax to the length of the stop pin. Because the stop pin hits the bottom of the second partial pin, further displacement of the first partial pin from the second partial pin is prevented. If the first partial pin is pushed as far as it can into the second partial pin, the return spring is maximally clamped and the stop pin is pushed out of the second partial pin. The polygonal pin is in the second state and has the minimum axial length.

[0018] If the window fitting of the window locking system is mounted on the window or on the window mechanism of the window locking system and the polygonal spindle is operatively connected to the window gear and the window handle, then, depending on the length requirements, the first partial pin can be pushed into the second partial pin, thereby adapting the axial length of the polygonal spindle to the design of the window frame and the window mechanism of the window locking system. The stop pin at the second axial longitudinal end of the polygonal spindle can protrude from the second partial pin into the window handle. Since the axial length of the second partial pin is technically irrelevant and sufficiently freely adjustable, the pushing out of the stop pin can be compensated for by the shorter length of the second partial pin. This means that the polygonal spindle can be used with any standardized window handle or without any adaptation of the window handle.

[0019] According to the invention, the second partial pin has a circumferential and radially outward-facing stop flange facing the first partial pin. The polygonal pin can be axially fastened on one side in a window locking element by means of the stop flange. In other words, the stop flange can prevent axial displacement of the polygonal pin in the window locking element. This allows the polygonal pin to always be arranged precisely and securely in the window locking element. If the polygonal pin is positioned in the window locking element, the stop flange can, for example, prevent the polygonal pin from being displaced out of the window locking element when the first partial pin is pushed into the second partial pin during assembly.

[0020] According to the invention, the second partial pin also has at least one axially aligned notch facing the first partial pin for radially clamping the polygonal pin in a window locking element. This allows the polygonal pin to be clamped in the window locking element, thereby preventing axial displacement of the polygonal pin from the window locking element. At the notch, in particular, the cross section of the second partial pin can be reduced, thereby clamping the second partial pin in the window locking element. The notch also enables a positive connection between the two partial pins once the polygonal pin is connected to a window handle by means of an axial connecting element - preferably a grub screw. The connecting element can deform the second partial pin to the notch and pressed against the first partial pin, thereby clamping it in the second partial pin.When the polygonal pin is clamped into the window locking element and the connecting element is firmly connected to the polygonal pin, the first pin is fixed in the second pin, the window handle is fixed to the polygonal pin, and the polygonal pin is fixed in the window locking element, preventing axial and radial displacement. As a result, all elements are now firmly connected to one another and free of play.

[0021] The first pin and / or the second pin can have a continuous and constant cross-section perpendicular to the longitudinal axis of the polygonal pin. If the polygonal pin is a square pin, the first pin and / or the second pin can have a rectangular cross-section. This allows for simplified manufacturing and production of the pins, and complex manufacturing processes can be avoided or circumvented.

[0022] The invention also relates to a device or an assembly for a window fitting of a window locking system, wherein the device or the assembly comprises a polygonal pin of the type described above and a window locking element. The window locking element has a support piece for securing the window locking element to a window frame of a window and a locking unit for receiving the polygonal pin. The locking unit is rotatably received in the support piece and the polygonal pin is rotatably connected to the support piece about the longitudinal center axis by means of the locking unit and can be locked in at least two positions. The polygonal pin is designed as described above. The polygonal pin can be precisely positioned in the locking unit, in particular by means of the stop flange, and can be clamped in a displacement-proof manner by means of the notch.

[0023] As already described above, the second partial pin of the polygonal pin can have at least one axially aligned notch facing the first partial pin of the polygonal pin. The polygonal pin can then be clamped in the window locking element in the region of the axial notch. In particular, the cross-section of the second partial pin can be reduced at the notch, so that the second partial pin can be clamped in the window locking element.

[0024] The device can also have a window handle and a connecting element, preferably a grub screw. The window handle can be connected to the polygonal pin in an axially displaceable manner via the connecting element connected to the polygonal pin. Furthermore, the first partial pin can be clamped in the second partial pin by the connecting element in the region of the axial notch. The window handle and the window locking element can then be indirectly connected to one another in an axially displaceable manner via the polygonal pin. In other words, the window handle and the window locking element can be connected to the polygonal pin in an axially displaceable manner, and the window handle and the window locking element can thereby be fixed to one another in an axially displaceable manner.

[0025] As already described above, the cross-section of the second pin can be reduced at the notch, thereby clamping the second pin in the window locking element and also the first pin in the second pin. The notch thus enables a positive connection between the two pins once the polygonal pin is connected to the window handle by means of the axial connecting element. The connecting element allows the second pin to be deformed at the notch and pressed against the first pin, thereby clamping it in the second pin.

[0026] Further important features and advantages of the invention emerge from the subclaims, from the drawings and from the associated description of the figures with reference to the drawings.

[0027] It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention defined by the claims.

[0028] Preferred embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description, wherein the same reference numerals refer to the same or similar or functionally identical components.

[0029] They show, schematically Figs. 1 and 2 show a view and an exploded view of a polygonal pin according to the invention; Figs. 3 to 5 show a side view, a partial sectional view and a view of the polygonal pin according to the invention in a first final state; Figs. 6 to 8 show a side view, a partial sectional view and a view of the polygonal pin according to the invention in a second final state; Figs. 9 and 10 show views of a device according to the invention with the polygonal pin according to the invention and a window locking element; Fig. 11 show a partial exploded view of the device according to the invention; Fig. 12 show an exploded view of the device according to the invention as part of a window fitting of a window locking system; Figs. 13 and 14 show sectional views of the window locking system with the device according to the invention mounted on different windows.

[0030] Fig. 1 shows a view and Fig. 2shows an exploded view of a polygonal pin 1 according to the invention. The polygonal pin 1 is elongated and has a longitudinal center axis LA and two longitudinal ends 1a and 1b axial with respect to the longitudinal center axis LA. The first longitudinal end 1a is designed for rotationally fixed connection to a window gear of a window mechanism of a window locking system and the second longitudinal end 1b is designed for rotationally fixed connection to a window handle of a window fitting of the window locking system, as will be explained below with reference to Fig. 13 and Fig. 14 is described in more detail. In this exemplary embodiment, the polygonal pin 1 has a square cross-section transverse to the longitudinal center axis LA and is therefore a square pin.

[0031] The polygonal pin 1 has a first partial pin 2a, which forms the first longitudinal end 1a, and a second partial pin 2b, which forms the second longitudinal end 1b. The first partial pin 2a is a solid body and the second partial pin 2b is a pot-shaped hollow body. The outer diameter or outer contour of the first partial pin 2a and the inner diameter or inner contour of the second partial pin 2b are shaped such that the first partial pin 2a is accommodated in the second partial pin 2b in an axially displaceable manner. As a result, an axial length L of the polygonal pin 1 can be changed, as will be explained below with reference to Fig. 3-5 and Fig. 6-8 is described in more detail. The outer diameter of the first partial pin 2a and the inner diameter of the second partial pin 2b can be, for example, 7 mm. The outer diameter of the second partial pin 2b can be, for example, 8 mm.

[0032] Furthermore, the polygonal pin 1 has a return spring 3—here a helical spring—which is accommodated in the second partial pin 2b. The return spring 3 is axially clamped between a base 4 of the second partial pin 2b, which is aligned transversely to the longitudinal center axis LA, and the first partial pin 2a. The return spring 3 is thus supported on one side by the base 4 of the second partial pin 2b and on the other side by the first partial pin 2a. The return spring 3 is clamped when the first partial pin 2a is pushed into the second partial pin 2b and is released when the first partial pin 2a is pushed out of the second partial pin 2b.

[0033] The polygonal pin 1 further comprises a stop pin 5, which is axially aligned and received in the second partial pin 2b. The stop pin 5 is fastened to the first partial pin 2a facing the second partial pin 2b or is screwed to the first partial pin 2a. The return spring 3 is arranged around the stop pin 5 in a space-saving manner. The stop pin 5 has a stop head 6, wherein the stop head 6 protrudes from the base 5 of the second partial pin 2b and strikes the base from the outside. The stop pin 5, together with the first partial pin 2a, is arranged axially displaceably in the second partial pin 2b, so that the stop pin 5 can protrude from the base 4 of the second partial pin 2b or can strike axially with its stop head 6 against the base 4 of the second partial pin 2b. The stop pin 5 prevents the first partial pin 2a from being pushed out too far from the second partial pin 2b when the return spring 3 is released.The stop pin 5 thus determines the maximum and minimum axial length of the polygonal pin 1, as shown below. Fig. 3-5 and Fig. 6-8 is described in more detail.

[0034] The first partial pin 2a also has several stop formations 23 facing away from the second partial pin 2b or facing the first longitudinal end 1a of the polygonal pin 1. The stop formations 23 prevent the first partial pin 2a from being pushed too far axially into a window gear of the window mechanism of the window locking system, as will be explained below with reference to Fig. 13 and Fig. 14 is described in more detail. The second partial pin 2b further has a circumferential and radially outwardly directed stop flange 7 facing the first partial pin 2a. The stop flange 7 is designed for the one-sided axial fixing of the polygonal pin 1 in a window locking element, as will be described below with reference to Fig. 9-10 is described in more detail.

[0035] Fig. 3shows a side view, Fig. 4 shows a partial sectional view and Fig. 5 shows a view of the polygonal pin 1 according to the invention in a first final state. In the first final state, the polygonal pin 1 has a maximum axial length L MAX . The axial length L of the polygonal pin 1 is defined between its two longitudinal ends 1a and 1b or between the axial end of the first partial pin 2a facing away from the second partial pin 2b and the axial end of the second partial pin 2b facing away from the first partial pin 2a or the bottom 4 of the second partial pin 2b. In the first state, the first partial pin 2a protrudes from the second partial pin 2b to a maximum extent or to a maximum distance D MAX . In the first state, the return spring 3 is maximally relaxed and the stop head 6 of the stop pin 5 strikes from the outside against the bottom 4 of the second partial pin 2b.

[0036] Fig. 6 shows a side view, Fig. 7shows a partial sectional view and Fig. 8 shows a view of the polygonal pin 1 according to the invention in a second final state. In the second final state, the polygonal pin 1 has a minimum axial length L MIN . In the second state, the first partial pin 2a protrudes minimally, or to a minimum distance D MIN , from the second partial pin 2b. In the second state, the return spring 3 is maximally clamped, and the stop pin 5 protrudes maximally from the second partial pin 2b.

[0037] Referring to Fig. 3-8 the polygonal pin 1 can have several intermediate states between the first final state and the second final state. InIn the respective intermediate state, the polygonal pin 1 can have an axial length L between the maximum length L MAX and the minimum length L MIN . The first partial pin 2a can therefore protrude from the second partial pin 2b to any distance between the maximum distance D MAX and the minimum distance D MIN .

[0038] Fig. 9 and Fig. 10 show views of a device 8 according to the invention with the polygonal pin 1 according to the invention and a window locking element 9. Fig. 11shows a partially exploded view of the device 8 according to the invention. The window locking element 9 has a support piece 10 and a locking unit 11. The polygonal pin 1 is arranged in the locking unit 11 and the locking unit 11 is arranged in the support piece 10 in a rotationally fixed manner. By means of the locking unit 11, the polygonal pin 1 is rotatably connected to the support piece 10 and can be locked, for example, in 90° or 45° increments. The increments mentioned here are purely exemplary. In principle, increments with other increments are also conceivable. The polygonal pin 1 is arranged in a receiving opening 12 of the locking unit 11 via its stop flange 7 in a manner that is axially fixed on one side and is connected to the locking unit 11 via its contour in a rotationally fixed manner. In addition, two screw openings 13 are formed in the support piece 10, which are provided for fastening the window locking element 9 and thus the device 8 to a window frame.

[0039] Fig. 12shows an exploded view of the device 8 according to the invention as part of a window fitting 24 of a window locking system 20. The window fitting 24 of the window locking system 20 comprises, in addition to the device 8 according to the invention, two screws 15, a cover plate 17 and a ring 18. The device 8 also comprises a window handle 14 and a grub screw 16. The window locking element 9 of the device 8 can be used when mounting the window fitting 24 of the window locking system 20 on a window frame of a window - see Fig. 13 and Fig. 14- be screwed to the window frame using screws 15. The screws 15 extend through the screw holes 13 in the support piece 10 to the window frame. After installation, the cover plate 17 covers the window locking element 9 and thus the screws 15 to the outside. After installation, the window handle 14 is connected in a rotationally fixed manner to the second partial pin 2b or to the second axial longitudinal end 1b of the polygonal pin 1 via its contour, and the grub screw 16 connects the window handle 14 axially fixedly to the polygonal pin 1. After installation, the ring 18 lies between the cover plate 17 and the window handle 14 and simplifies the rotation of the window handle 14 with respect to the cover plate 17.

[0040] Fig. 13 and Fig. 14show sectional views of the window locking system 20 mounted on different windows 19a and 19b with the device 8 according to the invention. The window locking system 20 has a window mechanism 25 with a window gear 21 and the window fitting 24 has the window handle 14, the screws 15, the grub screw 16, the cover plate 17, the ring 18 and the device 8 according to the invention with the polygonal pin 1 according to the invention. The respective window 19a and 19b has a window frame 22 on which the window locking system 20 is mounted. The window locking element 9 of the device 8 is screwed to the window frame 22 via the screws 15 and the polygonal pin 1 of the device 8 projects with its first axial longitudinal end 1a through the respective window frame 22.The polygonal pin 1 is connected to the window gear 21 at its first longitudinal end 1a and to the window handle 14 at its second longitudinal end 1b via the grub screw 16. The cover plate 17 is firmly connected to the support piece 10 of the window locking element 9, and the ring 18 lies radially between the window handle 14 and the cover plate 17.

[0041] In comparison, the window gear 21 on the window 19a in Fig. 13 a smaller axial distance to the window handle 14 or to the locking unit 11 of the device 8 than the window gear 21 on the window 19b in Fig. 14 on.

[0042] In Fig. 13The smaller axial distance between the window gear 21 and the window handle 14 or the locking unit 11 of the device 8 is compensated for by the first partial pin 2a being pushed maximally into the second partial pin 2a. The polygonal pin 1 is therefore in the second state, and the first partial pin 2a protrudes a minimum distance D MIN from the second partial pin 2b. The polygonal pin 1 has the minimum axial length L MIN. The stop pin 5 protrudes axially 1 from the second partial pin 2b at the second longitudinal end 1a of the polygonal pin and into the window handle 14.

[0043] In Fig. 14The greater axial distance between the window gear 21 and the window handle 14 or the locking unit 11 of the device 8 is compensated for by the first partial pin 2a being pushed out of the second partial pin 2b to the maximum extent. The polygonal pin 1 is therefore in the first state, and the first partial pin 2a protrudes a maximum distance D MAX from the second partial pin 2b. The polygonal pin 1 has the maximum axial length L MAX. The stop pin 5 is completely accommodated in the second partial pin 2b.

[0044] It is advantageous that the described adjustment of the axial length L of the polygonal pin 1 takes place automatically during the assembly of the window fitting 24 of the window locking system 20 on the windows 19a and 19b. Thus, the device 8 with the polygonal pin 1 is pushed into the window gear 21 until the first partial pin 2a axially abuts the window gear 21 via its stop formations 23. If the window locking element 9 of the device 8 has not yet reached the window frame 22, the partial pin 2a is pushed into the partial pin 2b upon further axial displacement of the device 8 towards the window gear 21 until the window locking element 9 reaches the window frame 22 and can be fastened to the window frame 22. The length L of the polygonal pin 1 can be any length between the maximum length L MAX and the minimum length L MIN and can be adjusted automatically.As a result, the additional effort required for mounting the window fitting 24 of the window locking system 20 on the windows 19a and 19b or on the differing window mechanisms 25 of the window locking system 20 can be advantageously reduced.

[0045] Referring to Fig. 1 to Fig. 12 The second partial pin 2b has an axially aligned notch 26 facing the first partial pin 2a. The notch 26 extends parallel to the longitudinal axis LA through the entire partial pin 2b and is axially continuous. The notch 26 enables a reduction in the cross-section of the second partial pin 2b. Referring to Fig. 9 to Fig. 11 The second partial pin 2b can thereby be clamped in the window locking element 9. Referring to Fig. 12In addition, the first partial pin 2a can also be clamped into the second partial pin 2b via the grub screw 16. The second partial pin 2b can be arranged in the window locking element 9 and the first partial pin 2a in the second partial pin 2b, and thus all components can be arranged axially displaceably against one another.

Claims

1. Polygonal pin (1) for a window fitting (24) of a window closing system (20), - wherein the polygonal pin (1) is elongated and has a longitudinal central axis (LA), - wherein the polygonal pin (1) has a first longitudinal end (1a) for rotationally fixed connection to a window drive (21) and a second longitudinal end (1b) for rotationally fixed connection to a window handle (14), - wherein the polygonal pin (1) has a first partial pin (2a) forming the first longitudinal end (1a) and a second partial pin (2b) forming the second longitudinal end (1b), and - wherein the two partial pins (2a, 2b) are connected to one another in an axially displaceable manner and, as a result, an axial length (L) of the polygonal pin (1) defined by the distance between the longitudinal ends (1a, 1b) is variable, - wherein the second partial pin (2b) is hollow and the first partial pin (2a) is accommodated in the second partial pin (2b) in certain regions and in an axially displaceable manner, - wherein the polygonal pin (1) has a return spring (3) and the return spring (3) is accommodated in the second partial pin (2b), and - wherein the return spring (3) is axially clamped between a base (4) of the second partial pin (2b) arranged across the longitudinal axis (LA) and the first partial pin (2a), characterized in that - the second partial pin (2b) has a circumferential and radially outward oriented stop flange (7) facing the first partial pin (2a) for one-sided axial fixing of the polygonal pin (1) in a window latching element (9), and - the second partial pin (2b) has at least one axially oriented recess (26) facing the first partial pin (2a) for radially clamping the polygonal pin (1) in the window latching element (9).

2. Polygonal pin according to claim 1, characterized in that - the polygonal pin (1) has a first end state with a maximum axial length (LMAX), wherein, in the first end state, the first partial pin (2a) is pushed out of the second partial pin (2b) to a maximum distance (DMAX), and - the polygonal pin (1) has a second end state with a minimum axial length (LMIN), wherein, in the second end state, the first partial pin (2a) is pushed out of the second partial pin (2b) to a minimum distance (DMIN).

3. Polygonal pin according to claim 2, characterized in that - the polygonal pin (1) has a plurality of intermediate states between the first end state and the second end state, and - the polygonal pin (1) has an axial length (L) between the maximum length (LMAX) and the minimum length (LMIN) in the respective intermediate state.

4. Polygonal pin according to any one of claims 1 to 3, characterized in that - the polygonal pin (1) has an axially oriented stop pin (5) with a stop head (6) and the stop pin (5) is accommodated in the second partial pin (2a), and - the stop pin (5) is non-detachably connected on one side to the first partial pin (2a) and projects on the other side with the stop head (6) out of a base (4) of the second partial pin (2b) arranged across the longitudinal axis (LA) and engages axially behind it.

5. Polygonal pin according to claim 4, characterized in that the return spring (3) is a compression spring and is arranged around the stop pin (5).

6. Polygonal pin according to any one of the preceding claims, characterized in that the return spring (3) is preloaded to a maximum projection of the first partial pin (2a) out of the second partial pin (2b).

7. Polygonal pin according to any one of the preceding claims, characterized in that the first partial pin (2a) and / or the second partial pin (2b) have a continuous and constant cross section across the longitudinal axis (LA).

8. Polygonal pin according to any one of the preceding claims, characterized in that the first partial pin (2a) is continuously displaceable in the second partial pin (2b).

9. Device (8) for a window fitting (24) of a window closing system (20) with a polygonal pin (1) and a window latching element (9), - wherein the window latching element (9) has a support piece (10) for fixing the window latching element (9) to a window frame (22) of a window (19a, 19b) and a latch unit (11) for receiving the polygonal pin (1), - wherein the latch unit (11) is accommodated in the support piece (10) and the polygonal pin (1) is received in the latch unit (11) in a rotationally fixed manner, and - wherein the polygonal pin (1) is rotatably connected by means of the latch unit (11) to the support piece (10) about the longitudinal central axis (LA) and can be latched in at least two positions, characterized in that the polygonal pin (1) is designed according to any one of the preceding claims.

10. Device according to claim 9, characterized in that - the second partial pin (2b) of the polygonal pin (1) has at least one axially oriented recess (26) facing the first partial pin (2a) of the polygonal pin (1), and - the polygonal pin (1) is clamped in the window latching element (9) in the region of the axial recess (26).

11. Device according to claim 10, characterized in that - the device (8) has a window handle (14) and a connecting element, preferably a grub screw (16), - the window handle (14) is connected to the polygonal pin (1) in an axially non-displaceable manner by means of the connecting element connected to the polygonal pin (1), - the first partial pin (2a) is clamped in the second partial pin (2b) by means of the connecting element in the region of the axial recess (26), and - the window handle (14) and the window latching element (9) are connected indirectly to one another in an axially non-displaceable manner by means of the polygonal pin (1).