Snap ring, handle rosette, locking system for door or window fittings, as well as door or window fittings

Description

Technical field of the invention

[0001] The present invention relates to a locking system for door or window fittings, comprising a snap ring that allows simple and quick assembly and disassembly of the locking system, in particular of the element fastened by snapping into place. The present invention also relates to a handle rosette for locking systems for door or window fittings, by means of which the freedom of rotation of a snap ring about the rotation axis of the system is limited. This allows for simple and quick assembly and disassembly of the locking system. Furthermore, handles, knobs, and other operating elements can be quickly and easily mounted on and removed from a fitting using the locking system for door or window fittings according to the invention. Finally, the present invention also relates to fittings that comprise a locking system according to the invention. State of the art

[0002] Door or window fittings featuring a locking system for the handle mounting are known from the prior art. These systems are based on a handle with a mandrel sleeve featuring a recess. During installation, the mandrel sleeve is inserted through the handle rosette, spreading a snap ring, which then snaps into the recess of the mandrel sleeve. Such a mechanism holds the mandrel sleeve, or rather the actuating elements, and the handle rosette together in a simple manner.

[0003] Unfortunately, the locking systems for door or window fittings known from the state of the art have certain limitations.

[0004] First, operating elements are usually mounted on both sides of the door, connected to a square spindle. The square spindle is also connected to a lock in the middle section. However, due to manufacturing tolerances in door processing, the handles can never be perfectly concentric with each other. This leads to increased friction, so that in certain cases the force of the lock spring is no longer sufficient to return the handles to their zero position after operation. This also prevents easy installation of the fitting.

[0005] Secondly, the snap ring in the known locking systems can move relative to the system's rotation axis during assembly, making assembly more difficult. Furthermore, the snap ring in the known systems can rotate indefinitely around the pusher's rotation axis over time, making disassembly of the system almost impossible. Finally, the known snap rings do not allow for easy disassembly with pliers, as it is not possible to guarantee that the pliers will remain engaged with the snap ring during disassembly.

[0006] For example, WO 2004 / 063576 A1 discloses a locking element designed as a safety or snap ring. This locking element is an annular disc open at one point and has at least one area of ​​reduced width. The at least one area of ​​reduced width, between an inner circumferential line and an outer circumferential line, is located opposite the ring opening. The snap ring is received in a recess and, when mounted, is rotatable about the rotational axis of the pusher.

[0007] Furthermore, from GB 329 937 A1, a spring accommodated in a groove for the rotationally fixed connection between a knob and a plate is known, wherein a radial stop is provided in the groove so that the ring rotates with the rotational movement of the knob.

[0008] Based on the prior art, the present invention is therefore based on the object of overcoming the aforementioned disadvantages and of providing a handle rosette, a locking system and a fitting that enable simpler and faster assembly and disassembly of the door or window fitting. Summary of the invention

[0009] According to the present invention, these objects are achieved primarily by the elements of claims 1, 3, and 9. Further advantageous embodiments will also become apparent from the dependent claims and the description.

[0010] The objects of the present invention are achieved in particular by a handle rosette for locking systems of a door or window fitting, comprising a snap ring support surface for receiving a snap ring, wherein the snap ring support surface has an outwardly directed embossing extending in the axial direction.

[0011] Thanks to an inventive handle rosette, the system's snap ring can only move to a limited extent around the rotation axis of the locking system, or rather, the fitting's actuating element. This ensures that the snap ring is always in a position favorable for disassembly.

[0012] In a first preferred embodiment of the handle rosette of the invention, the embossing is pyramid-shaped. This facilitates the positioning of pliers intended for disassembly.

[0013] The objects of the present invention are also achieved by a locking system for a door or window fitting, comprising a handle rosette according to the invention, a mandrel sleeve to which an actuating element can be rotatably attached, the mandrel sleeve having a conical insertion surface at its end and a recess adjoining it, a snap ring which is dimensioned such that it can be pushed over the conical insertion surface of the mandrel sleeve and is thereby spread open, and that it can be snapped into the recess, the snap ring being located between the handle rosette and a cover sleeve or between the handle rosette and a cover plate, and the mandrel sleeve being rotatable about a rotation axis of the locking system, the snap ring having a ring opening at one point and the handle rosette having an embossing, the snap ring being oriented such that the ring opening coincides with the position of the embossing on the handle rosette.Thanks to such a locking system, assembly and disassembly are particularly easy, as the snap ring is always in a position convenient for assembly or disassembly. This is in contrast to conventional locking systems, in which the snap ring can move relative to the system's rotational axis, leading to difficulties during assembly and disassembly.

[0014] In a first preferred embodiment of the locking system of the invention, the dimensions of the embossing are selected such that the snap ring can only rotate around the locking system's rotational axis by an angle that is less than or equal to the angle defined by the ring opening. This further defines the position of the snap ring and makes disassembly even easier.

[0015] In another preferred embodiment of the locking system of the invention, the dimensions of the recess and the outer diameter of the mandrel sleeve are selected such that the mandrel sleeve can be tilted by an angle of up to 4°, advantageously up to 2°, relative to the axis of rotation of the locking system.

[0016] Latching systems for door or window fittings are primarily used in situations where the fitting's operating elements are mounted on both sides of the door. The mandrel sleeves, to which the operating elements are attached, are connected to a square mandrel, which is also connected to the lock in the middle section. Due to manufacturing tolerances during door processing, the mandrel sleeves are often not concentrically aligned. This leads to increased friction, so that in certain cases the force of the lock spring is no longer sufficient to return the handles to their neutral position after operation.the mandrel sleeve has a conical insertion surface at its end and a recess adjoining it, a snap ring which is dimensioned such that it can be pushed over the conical insertion surface of the mandrel sleeve and is spread open in the process, and that it can be snapped into the recess, wherein the snap ring is located between a handle rosette and a cover sleeve or between a handle rosette and a cover plate, and wherein the mandrel sleeve is rotatable about an axis of rotation of the locking system, wherein the snap ring has a ring opening at one point and the handle rosette has an embossing, wherein the snap ring is oriented such that the ring opening coincides with the position of the embossing of the handle rosette. With a locking system according to the invention, the functionality of the fitting is guaranteed even if there are major deviations in the alignment of the mandrel sleeves.The inventive locking system not only ensures that the fitting functions properly; it also enables easy assembly and disassembly of the fitting and the actuating element. If the alignment tolerance of the mandrel sleeves is larger, it is easier to connect the mandrel sleeves using a square mandrel.

[0017] As mentioned above, locking systems for door or window fittings are primarily used in situations where the fitting's operating elements are mounted on both sides of the door. The mandrel sleeves, to which the operating elements are attached, are connected to a square mandrel, which is also connected to the lock in the middle area. Due to manufacturing tolerances during door processing, the mandrel sleeves are often not concentrically aligned. This leads to increased friction, so that in certain cases the force of the lock spring is no longer sufficient to return the handle to the zero position after operation. With a locking system according to the invention, the functionality of the fitting is guaranteed even if there are significant deviations in the alignment of the mandrel sleeves.The inventive locking system not only ensures the fitting functions perfectly, but also enables easy assembly and disassembly. If the alignment tolerance of the mandrel sleeves is larger, it is easier to connect the mandrel sleeves using a square mandrel.

[0018] In a preferred embodiment of the locking system of the invention, a sliding element is located radially between the mandrel sleeve and the handle rosette. This reduces frictional resistance between the mandrel sleeve and the handle rosette, enabling improved functionality of the fitting.

[0019] In a further preferred embodiment of the locking system of the invention, the system comprises a handle rosette according to the present invention. This makes assembly and disassembly particularly easy, since the snap ring can move less relative to the system's rotational axis.

[0020] In another preferred embodiment of the locking system of the invention, the snap ring is oriented such that the ring opening and the position of the embossed rosette of the handle coincide. This ensures that the snap ring is always in a favorable position for disassembly.

[0021] In another preferred embodiment of the locking system of the invention, the dimensions of the embossing are selected such that the snap ring can only rotate around the locking system's rotational axis by an angle that is less than or equal to the angle defined by the ring opening. This allows for even better definition of the snap ring's position and makes disassembly even easier.

[0022] In another embodiment, a sliding element is located radially between the spindle sleeve and the handle rosette. This reduces frictional resistance between the spindle sleeve and the handle rosette, enabling improved functionality of the fitting.

[0023] In another embodiment, the locking system comprises a snap ring in the form of an annular disc open at one point, comprising an inner contour and an outer contour, wherein the snap ring has an indentation which represents a region of reduced width of the disc, wherein the indentation is located on the side of the disc opposite the ring opening, and wherein the snap ring has pliers clearances at the ring opening for the engagement of pliers jaws of pliers, in particular gripping pliers or expanding pliers, wherein the diameter of the outer contour of the snap ring increases in the direction of the ring opening.

[0024] Thanks to the shape of the snap ring, pliers intended for disassembly can be easily positioned and will not slip during disassembly. This is particularly advantageous since the disassembly of a snap ring, or a locking system or actuating element, often has to be carried out in very tight spaces.

[0025] In an additional preferred embodiment of the locking system, the diameter of the outer contour of the snap ring increases in the direction of the indentation. This optimized shape of the outer contour of the snap ring ensures that the snap ring can move less relative to the rotational axis of the locking system than the snap rings known from the prior art. This simplifies both the assembly and disassembly of the locking system, or rather the actuating elements. The design of the contour also prevents the snap ring from rotating about the rotational axis of the locking system. This ensures that the ring opening is always in a position favorable for disassembly, which is not guaranteed with the snap rings known from the prior art.It is important to note that the shape of the snap ring contour itself can be advantageous for both the assembly and disassembly of the locking system or the actuating elements, regardless of the presence of pliers clearances.

[0026] The objectives of the present invention are also achieved by a door or window fitting comprising a handle rosette according to the present invention and / or a locking system according to the present invention. The fitting according to the invention is then particularly easy to assemble and disassemble. The functionality of the fitting is thereby also improved. Further details of the invention will become apparent from the following description of the preferred embodiments of the invention, which are illustrated in the accompanying drawings. The description also reveals further advantages of the present invention, as well as suggestions and proposals as to how the subject matter of the invention could be modified or further developed within the scope of what is claimed. Brief description of the drawings

[0027] Figure 1shows a perspective schematic view of a locking system according to the invention according to a first preferred embodiment; Figure 2 shows a perspective schematic sectional view of a locking system according to the invention according to the first preferred embodiment; Figure 3 shows a perspective schematic view of a locking system according to the invention according to the first preferred embodiment, in which the cover sleeve is hidden; Figure 4 shows a perspective schematic exploded view of a locking system according to the invention according to the first preferred embodiment; Figure 4a shows a perspective schematic detailed view of a handle rosette according to the invention according to a first preferred embodiment; Figure 5a shows a first sectional view of a locking system according to the invention according to the first preferred embodiment; Figure 5bshows a second sectional view of a locking system according to the invention according to the first preferred embodiment; Figure 6 shows a schematic plan view of a snap ring for the locking system according to the invention; Figure 7 shows a comparison between the contour of a snap ring for the locking system according to the invention and that of a perfect annular disc; Figure 8 illustrates the positioning of a pliers intended for disassembly in the pliers' clearances of a snap ring for the locking system according to the invention; Figure 9 shows a perspective schematic view of a handle rosette according to the invention according to a first preferred embodiment; Figure 10 shows a perspective schematic sectional view of a locking system according to the invention according to a second preferred embodiment; Figure 11shows a perspective schematic view of a locking system according to the invention according to the second preferred embodiment; Figure 12 shows a perspective schematic view of a locking system according to the invention according to the second preferred embodiment, in which the cover sleeve is hidden; Figure 13 shows a perspective schematic exploded view of a locking system according to the invention according to the second preferred embodiment; Figure 14a shows a sectional view of a locking system according to the invention according to the second preferred embodiment; Figure 14b shows a sectional view of a locking system according to the invention according to a third preferred embodiment; Figure 15 shows a perspective schematic view of a handle rosette according to the invention according to the second preferred embodiment; and Figure 16shows a sectional view of a locking system according to the invention according to a fourth preferred embodiment. Preferred embodiments of the invention

[0028] Figures 1 and 2 show perspective schematic views of a locking system 10 comprising a pusher pin sleeve 11 and a pusher rosette 12 according to a first preferred embodiment of the present invention. Figures 1 and 2 show the locking system 10 after the mandrel sleeve 11 has been inserted into the handle rosette 12. A snap ring 14 is located in a recess 11b (see Figure 2 ) of the mandrel sleeve 11 and holds the mandrel sleeve 11 and the handle rosette 12 together. The locking system 10 also includes a cover sleeve 15, which can be firmly attached to the handle rosette 12. Figure 3 shows the locking system 10 from the same angle as in Figure 2 , but without cover sleeve 15. This makes snap ring 14 and recess 11b easier to see.

[0029] Figure 4shows an exploded view of the locking system 10 according to a first preferred embodiment of the present invention. As can be seen from this figure, in addition to the above-mentioned elements, the locking system 10 also has a base plate 13, which can serve as a cover plate for the fitting.

[0030] The handle rosette 12 is configured such that it can be pressed into the opening 13a of the base plate 13 during assembly, thereby creating a firm connection between the handle rosette and the base plate. Once the handle rosette 12 and the base plate 13 are connected together, in a further assembly step, the snap ring 14 can be placed on the snap ring support surface 12a of the handle rosette and the cover sleeve 15 can be attached over the snap ring 14 and the handle rosette 12. In the final assembly step, the mandrel sleeve 11 with handle (not shown here) is pushed through the handle rosette 12 along the rotation axis H (see Figure 2) pressed in.

[0031] As in the Figures 1 to 4 As can be seen, the mandrel sleeve 11 has a conical insertion surface 11a and a recess 11b. Thanks to the conical shape of the insertion surface 11a, the snap ring 14 is expanded as the mandrel sleeve 11 is pressed into the handle rosette 12. The snap ring 14 finally snaps into the recess 11b of the mandrel sleeve 11 and then holds the mandrel sleeve 11 together with the handle rosette 12.

[0032] As in the Figures 5a, 5b and 6As shown, the snap ring 14 has the shape of an annular disc open at a point 14a. Advantageously, the snap ring 14 also has an indentation 14b, which represents a region of reduced width in the disc. The preferably arcuate indentation 14b greatly reduces the spring tension of the snap ring 14, and the latter can thus be spread during assembly with just a short and steep conical insertion surface 11a.

[0033] Figure 7shows a preferred embodiment of a snap ring 14 for the locking system according to the invention (not shown). If one now compares the shape of the snap ring 14 with the shape of a perfectly annular disc 16 of the same thickness D1, one can see that the outer contour 14c of the snap ring 14 is slightly deformed outward along the direction J. In other words, the diameter D14 of the outer contour 14c of the snap ring 14 increases in the direction of the ring opening 14a and the indentation 14b. However, it would be conceivable for the diameter D14 to increase only in the direction of the ring opening or the indentation.

[0034] Thanks to the shape of the outer contour 14c of the snap ring 14, the snap ring 14, when positioned between the handle rosette 12 and the cover sleeve 15, can move less from the rotational axis H of the locking system 10. This ensures that the conical insertion surface 11a on the mandrel sleeve 11 can always be easily inserted into the opening of the snap ring 14. It also ensures that the snap ring 14 can rotate less around the rotational axis H of the locking system 10 during the actuation of the fitting. As explained below, this enables easier disassembly of the locking system.

[0035] For dismantling the fitting, or disassembling the mandrel sleeve 11 and the handle rosette 12, suitable pliers 17 (see Figure 8 ) the snap ring 14 must be spread again. With the snap ring 14 spread, the mandrel sleeve 11 can be separated from the handle rosette 12. As shown in the Figures 7 and 8As can be seen, the snap ring 14 has special pliers releases 17d, which simplify positioning of the pliers 17 on the snap ring 14 and prevent the pliers 17 from slipping during disassembly.

[0036] To allow the pliers 17 to access the snap ring 14 during disassembly, the cover sleeve 15 has an opening 15a. Disassembly can of course only occur if the position of the ring opening 14a of the snap ring 14 and the position of the opening 15a of the cover sleeve 15 sufficiently match. To ensure that the ring opening 14a of the snap ring 14 is always in a position suitable for disassembly, the handle rosette 12, specifically the snap ring support surface 12a of the handle rosette, has an embossing 12b. The dimension of this embossing 12b is selected such that the snap ring 14 can only rotate to a limited extent about the rotation axis H of the locking system 10. Thus, the snap ring 14 is always in a position suitable for disassembly.

[0037] As in Figure 4aAs shown, the embossed portion 12b advantageously has a pyramidal shape. This allows, among other things, easy positioning of the pliers 17 for disassembly.

[0038] As from Figure 9 As can be seen, the embossing 12b can advantageously be formed by notching the snap ring support surface 12a of the handle rosette 12.

[0039] Figures 10 to 14a show a locking system 20 for a door or window fitting according to a further preferred embodiment of the present invention. The locking system 20 differs from the locking system 10 in the design of the handle rosette and the base plate. While in the locking system 10 these components are designed as two separate but firmly connectable elements, the handle rosette 22 and base plate 23 in the locking system 20 form a single component 24, as shown in Figure 13shown. This allows the total length L20 of the locking system 20 to be kept smaller than the length L10 of the locking system 10, as can be seen from the comparison of the Figures 5a and 14 Otherwise, the elements of the locking system 20 correspond to those of the locking system 10. In particular, the locking system 20 also features an embossing 22b on the snap ring support surface of the handle rosette 22 to prevent rotation of the snap ring 14 and thus ensure easy disassembly. The embossing 22b can, as shown in Figure 15 illustrated, by notching the snap ring support surface 22a.

[0040] Instead of a cover sleeve 15 as in the embodiment of the Figure 14a It is possible that the snap ring 14 is located between the handle rosette 42 and a cover plate 48. As shown in Figure 14b, which represents a locking system 40 for door or window fittings according to a third embodiment of the present invention, a cover sleeve can be dispensed with. As shown in Figure 14b As can be seen, it is advantageous if the cover plate 48 has an asymmetrical shape. This makes it easier to insert the mandrel sleeve into the handle rosette. The cover plate 48 only has to ensure that the snap ring 14 cannot come out of the handle rosette. Furthermore, the asymmetrical shape of the cover plate 48 simplifies the disassembly of the locking system, as it ensures access to the opening of the snap ring 14.

[0041] Figure 16 shows a locking system 30 for door or window fittings according to a further embodiment of the present invention. In In this embodiment, the recess 31b and the outer diameter D31 of the mandrel sleeve 31 are as shown in Figure 16shown, configured in such a way that the mandrel sleeve 31 can compensate for an angular error α relative to the axis of rotation H of up to 4°, preferably up to 2°. This means that a fitting with the locking system 30 can function perfectly even with larger deviations. This is particularly advantageous in cases where handles are attached to the respective mandrel sleeves 31 on both sides of the door. The mandrel sleeves are connected to a square mandrel (not shown here), which is also connected to a lock in the middle area. Due to the manufacturing tolerances during door processing, the mandrel sleeves cannot, in most cases, be aligned concentrically to one another. This leads to increased friction and improper functioning of the fitting. Increased friction is particularly problematic in the case of locks with weak retaining springs.Due to the increased friction, it's not uncommon for the spring force to be insufficient to return the pushers to their zero position after operation. In the . Figure 16 In the embodiment shown, the handle rosette and base plate form only one element (as in the locking system 20). However, it is of course possible to provide the locking system 30 such that the handle rosette and the base plate form two separate elements (as in the locking system 10).

[0042] It should be noted that in all embodiments of the locking system 10, 20, 30, 40 according to the invention, one or more sliding elements 19 are provided between the mandrel sleeve and the handle rosette. The sliding elements 19 allow the mandrel sleeve to rotate in the handle rosette with minimal friction.

[0043] Finally, it should be emphasized again that the embodiments described here by way of example represent only possible implementations of the inventive ideas and should not be considered limiting in any way. Those skilled in the art will understand that other implementations of the invention and additional elements are possible without neglecting the essential features of the invention defined by the patent claims.

Claims

1. Pusher escutcheon (12, 22) for locking systems of a door or window fitting, comprising a snap ring bearing surface (12a, 22a) for receiving a snap ring, characterized in that the snap ring bearing surface (12a, 22a) has an outwardly directed embossing (12b, 22b) extending in the axial direction.

2. Pusher escutcheon according to claim 1, whereby the embossing (12b, 22b) is of pyramidal shape.

3. Locking system for a door or window fitting, comprising a pusher escutcheon (12, 22) according to claim 1 and / or 2, a mandrel sleeve (11, 31) to which an actuating element is able to be attached in a rotationally fixed manner, whereby the mandrel sleeve (31) has a conical insertion surface (11a, 31a) at the end and a recess (11b, 31b) adjacent thereto, a snap ring (14), which is dimensioned such that it is able to be pushed over the conical insertion surface (11a, 31a) of the mandrel sleeve (11, 31) and is thereby spread open, and that it is able to be latched into the recess (11b, 31b), wherein the snap ring (14) is located between the pusher escutcheon (12, 22) and a cover sleeve (15) or between the pusher escutcheon (12, 22) and a cover disc (48), and wherein the mandrel sleeve is rotatable about an axis of rotation (H) of the locking system (30), characterized in that the snap ring (14) has a ring opening (14a) at one place and the pusher escutcheon (12, 22) has an embossing (12b, 22b), whereby the snap ring (14) is orientated in such a way that the ring opening (14a) coincides with the position of the embossing (12b, 22b) of the pusher escutcheon4. Locking system according to claim 3, whereby the dimensions of the embossing (12b, 22b) are selected such that the snap ring is only rotatable about the axis of rotation (H) of the locking system by an angle which is smaller than or equal to the angle defined by the ring opening (14a).

5. Locking system according to one of the claims 3 or 4, whereby the dimensions of the recess (11b, 21b, 31b) and the outer diameter of the mandrel sleeve (D31) are selected in such a way that the mandrel sleeve is able to be tilted through an angle of up to 4°, advantageously up to 2°, relative to the axis of rotation (H) of the locking system6. Locking system according to one of the claims 3 to 5, whereby a sliding element (19) is located in the radial direction between the mandrel sleeve and the pusher escutcheon.

7. Locking system according to one of the preceding claims, characterized in that the snap ring (14) is in the form of an annular disc which is open at one place (14a) and comprises an inner contour (14d) and an outer contour (14c), the snap ring (14) having an indentation (14b) which represents a region of reduced width of the disc, the indentation (14b) being located on the side of the disc opposite the ring opening (14a), and whereby the snap ring (14) at the ring opening (14a) has pincer release positions (17d) for the engagement of pincer jaws of pincers, in particular gripping pincers or spreading pincers, whereby the diameter (D14) of the outer contour (14c) of the snap ring (14) increases in the direction of the ring opening (14a)8. Locking system according to claim 6, characterized in that the diameter (D14) of the outer contour (14c) of the snap ring (14) increases in the direction of the indentation (14b).

9. Door or window fitting comprising a pusher escutcheon (12, 22) according to one of the claims 1 or 2 and / or a locking system according to one of the claims 3 to 8.