Rosette for a door fitting

Abstract

Rosette for a door fitting with a substructure (14) that can be mounted on a door leaf (12) for storing a door handle or for inserting a door key, and a cover (16) that can be screwed onto a circumferential thread (24) of the substructure (14) in a screwing motion, characterized by a locking mechanism (28, 38) effective between the substructure (14) and the cover (16), which holds the cover (16) in a defined rotational orientation in at least one locking position achievable during the screwing motion.

Description

[0001] The invention relates to a rosette for a door fitting with a substructure that can be mounted on a door leaf for storing a door handle or for inserting a door key, and a cover that can be screwed onto a circumferential thread of the substructure in a screwing motion.

[0002] Such a rosette is known from EP 0 942 121 of the applicant. The substructure there consists of an easily mounted base and a support body for quick attachment to the mounting base, with a screw-on ring as a cover ensuring a permanent connection between the support body and the mounting base. The screw-on ring has a circular cylindrical circumferential contour, the rotational position of which remains undefined during installation.

[0003] Based on this, the invention aims to further improve devices known in the prior art and to provide additional design variants for simple and reliable assembly.

[0004] To solve this problem, the combination of features specified in claim 1 is proposed. Advantageous embodiments and further developments of the invention are described in the dependent claims.

[0005] The invention is based on the idea of ​​facilitating the desired rotational positioning of the cover by means of a locking device. Accordingly, the invention proposes a locking mechanism acting between the substructure and the cover, which, in at least one detent position achievable during the screwing motion, releasably holds the cover in a defined rotational orientation. In this way, it is particularly easy for the installer to adjust and secure the cover in a specific final position when screwing it on. Such a final position can be advantageous for design reasons, for example, to prevent the cover from being screwed into the door leaf. A particular advantage is also achieved in terms of appearance, because a uniform alignment can be ensured for multiple doors or for handle and key rosettes, which is especially advantageous for asymmetrical covers.Further advantages arise from the fact that, thanks to the combined screw and snap-fit ​​connection, additional securing screws, which could also affect the design, can be omitted. It is also possible to combine different covers, similar to a modular system, using an existing circumferential thread on the substructure.

[0006] According to an advantageous embodiment, it is possible that the outer contour of the cover has multiple rotational symmetry with respect to the axis of rotation of the screw movement, and that the detent positions define a plurality of congruent rotational orientations of the cover.

[0007] Greater design freedom thus ensures a uniform alignment. According to an advantageous embodiment, the cover has a polygonal, in particular four- or six-sided, outer contour, or also an oval or circular cylindrical outer contour.

[0008] For a permanent connection, it is advantageous if the cover, as a screw-on ring, has an internal thread that can be engaged with the circumferential thread of the substructure.

[0009] Advantageously, the locking mechanism has at least one locking element which can be detachably locked into a locking recess, wherein the locking element is located on the cover and the locking recess is located on the substructure, or vice versa.

[0010] Another structurally advantageous design provides that at least one detent recess is formed as a transverse notch on the circumferential thread.

[0011] Advantageously, the locking mechanism has a locking element that is pressed into the detent position by spring force. It is beneficial if the locking mechanism incorporates a detent spring pre-tensioned against the circumferential thread as the detent element, wherein the detent spring slides on the thread during screwing and engages in a detent recess in the thread under spring force. A further improvement provides that a preferably curved leaf spring is designed as the detent element of the locking mechanism, and that the leaf spring is inserted as an insert into a recess, preferably in the cover.

[0012] In order to make optimal use of the available installation space, it is advantageous if, in the case of a cover which has a variable wall thickness viewed radially to the axis of the screw movement, the locking element is arranged in a widened wall area, in particular a corner area of ​​the cover.

[0013] To create a reliable locking connection, it is advantageous if the locking mechanism has several locking elements arranged at angular intervals in the direction of the screw movement, which simultaneously enter a locking position during the screw movement.

[0014] To further simplify installation, it is advantageous if the substructure includes a mounting base with a circumferential thread that can be fixed to the door leaf, and a central section that can be placed on the mounting base and is at least partially covered by the cover. However, the use of a one-piece substructure is also conceivable.

[0015] Furthermore, it is also advantageous from an optical point of view if the cover has a front section turned away from the door leaf with a central opening for the door handle or door key to pass through.

[0016] The invention will now be explained in more detail with reference to the exemplary embodiments shown schematically in the drawing. The drawing shows... Fig. 1 a pair of rosettes mounted on both sides of a door leaf in a horizontal section; Fig. 2 the individual parts of a rosette with square screw ring in a perspective exploded view; Fig. 3 the rosette according to Fig. 2 in assembly; Fig. 4 a locking element of the rosette after Fig. 3 in a corner cutout; Fig. 5 Another embodiment of a rosette in an exploded view.

[0017] The rosettes 10 shown in the drawing serve to mount a door handle or cover a door lock on a door leaf 12. For this purpose, the rosettes 10 comprise a substructure 14 and a cover 16 that can be screwed onto it, which is held in a defined rotational orientation by a locking mechanism or locking connection.

[0018] The in Fig. The arrangement shown in Figure 1 consists of a pair of rosettes 10, which are mounted flush with each other on opposite surfaces of the door leaf 12 and are fixed to each other by means of fastening screws 18. To enable this, the substructure 14 includes a mounting base 20 held by the screws, onto which a support plate 22 for a door handle (not shown) can be placed. The support plate 22 can then be permanently secured as the central part of the rosette arrangement by screwing the cover onto a circumferential thread 24 of the mounting base 20. Details of the assembly are described in EP 0 942 121 A1, to which explicit reference is made here.

[0019] The special details of the aforementioned components are best seen from Fig. 2. The ring-shaped mounting base 20, which is provided with cams 26 for the screws 18, has several transverse notches 28 on its circumferential thread 24, which are arranged at angular intervals of 90° and serve as detent recesses for the detent mechanism for the rotational alignment of the cover 16.

[0020] The cover 16 has an internal thread 30 as a screw-on ring, which corresponds to the circumferential thread 24 of the mounting base 20. Primarily for aesthetic reasons, the cover 16 has a square outer contour, formed by an outer surface 32 facing away from the internal thread 30. The visible edge of the outer surface 32 defines a square cover surface 34, which connects flush to a stepped end face 36 of the carrier plate 22 via an inner ring opening 36.

[0021] To enable the cover 16 to be easily aligned in a desired rotational orientation on the door leaf 12 when screwed on, the locking mechanism comprises two locking elements 38 arranged diametrically opposite to the central axis of the thread 30. These are designed as curved leaf springs that are inserted into corresponding recesses 40 in the corner areas of the cover 16. The recesses 40 are open towards the door side and form an opening for a locking lug 42 of the leaf spring 38 in the area of ​​the internal thread 30.

[0022] In the Fig. 3 and Fig. In the assembly state shown in Figure 4, the leaf springs 38 engage in the locking notches 28, with the outer surface 32 aligned vertically or horizontally with the door leaf 12. This locking position is achieved during the screwing movement of the cover 16, as the locking lug 42 slides on the circumferential thread 24 and is held under preload by the spring ends 44 supported in the recess 40. In this way, overtightening beyond a locking position is also possible, so that during assembly, the gap between the cover 16 and the door leaf 12 can be adjusted to be as close as possible to a gapless position.

[0023] When rotated 90°, the square cover 16 aligns with itself, meaning it has fourfold or four-axis rotational symmetry with respect to the axis of rotation of the screw movement. Accordingly, the mounting base 20 has four detent recesses 28, which define four detent positions with each rotation. In this way, the final position of the cover 16 can be finely adjusted at a small distance from the door leaf 12.

[0024] Fig.Figure 5 shows an embodiment of a rosette with a hexagonal cover 16, the central part 22 being omitted for the sake of simplicity. Here, too, two diametrically opposed detent elements 38 are provided in corner recesses 40 to reliably secure the desired rotational orientations. These are defined by detent notches 28 in the circumferential thread 24, which have an angular spacing of 30°. Thus, six congruent detent positions are achieved, in which two opposing corners are aligned horizontally or vertically.

Claims

[1] Rosette for a door fitting with a substructure (14) that can be mounted on a door leaf (12) for storing a door handle or for inserting a door key, and a cover (16) that can be screwed onto a circumferential thread (24) of the substructure (14) in a screwing motion, characterized by a locking mechanism (28,38) acting between the substructure (14) and the cover (16), which holds the cover (16) in a defined rotational orientation in at least one locking position achievable during the screwing movement. [2] Rosette according to claim 1, characterized by , that the outer contour (32) of the cover (16) has multiple rotational symmetry with respect to the axis of rotation of the screw movement, and that the detent positions define a plurality of congruent rotational orientations of the cover (16). [3] Rosette according to claim 1 or 2, characterized by, that the cover (16) has a polygonal, in particular four- or six-sided, outer contour (32). [4] Rosette according to claim 1 or 2, characterized by , that the cover (16) has an oval or a circular cylindrical outer contour (32). [5] Rosette according to any one of claims 1 to 4, characterized by , that the cover (16) has an internal thread (30) which can be engaged with the circumferential thread (24) of the substructure (14) as a screw-on ring. [6] Rosette according to any one of claims 1 to 5, characterized by , that the locking mechanism (28,38) has at least one locking element (38;42) which can be detachably locked into a locking recess (28), wherein the locking element (38;42) is located on the cover (16) and the locking recess (28) is located on the substructure (14), or vice versa. [7] Rosette according to any one of claims 1 to 6, characterized by , that at least one detent recess (28) is formed as a transverse notch on the circumferential thread (24). [8] Rosette according to any one of claims 1 to 7, characterized by , that the detent mechanism (28,38) has a detent element (38;42) which is forced into the detent position by spring force. [9] Rosette according to any one of claims 1 to 8, characterized by , that the detent mechanism (28,38) has a detent spring pre-tensioned against the circumferential thread (24) as a detent element (38;42), wherein the detent spring slides on the circumferential thread (24) during the screwing movement and engages in a detent recess (28) in the circumferential thread (24) under the spring force. [10] Rosette according to any one of claims 1 to 9, characterized by , that a preferably curved leaf spring is provided as a detent element (38;42) of the detent mechanism (28,38), and that the leaf spring is inserted as an insert part into a recess (40) preferably of the cover (16). [11] Rosette according to any one of claims 1 to 10, characterized by, that the cover (16) has a variable wall thickness when viewed radially to the axis of the screw movement, and that the locking element (38;42) is arranged in a widened wall area, in particular a corner area of ​​the cover (16). [12] Rosette according to any one of claims 1 to 11, characterized by , that the locking mechanism (28,38) has several locking elements (38;42) arranged at angular intervals in the direction of the screw movement, which simultaneously enter a locking position during the screw movement. [13] Rosette according to any one of claims 1 to 12, characterized by , that the substructure (14) has a mounting base (20) provided with the circumferential thread (24) which can be fixed to the door leaf (12) and a central part (22) which can be placed on the mounting base (20) and which is covered at least on the edge side by the cover (16). [14] Rosette according to any one of claims 1 to 13, characterized by, that the cover (16) has a front part (34) turned away from the door leaf (12) with a central opening (36) for the passage of the door handle or door key.

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