Lock for a single-walled door leaf

Abstract

Lock for a single-walled door leaf (10; 10'), comprising a housing (16) having two parallel walls (22, 24), one of which forms a contact surface (26) for contact with the door leaf (10; 10'), and a guide element (34) forming a guide channel (36) for an actuating element (14) for actuating the lock, which projects from the contact surface (26) and, in the assembled state, extends into a hole (12) in the door leaf, characterized in that the guide element (34) is adjustable in the direction perpendicular to the contact surface (26) between two positions in which it projects from one of the parallel walls (22, 24) on opposite sides of the housing (16).

Description

[0001] The invention relates to a lock for a single-walled door leaf, with a housing having two parallel walls, one of which forms a contact surface for contact with the door leaf, and with a guide element that forms a guide channel for an actuating element for actuating the lock and which projects from the contact surface and, in the assembled state, extends into a hole in the door leaf.

[0002] Locks of this type are described in DE 20 2019 004 934 U1, DE 20 2013 000 194 U1 and DE 101 29 162 A1.

[0003] Door locks generally feature a locking element that secures the door leaf to a door frame. The lock housing contains a gear mechanism that effectively connects the locking element to the operating element. This operating element can be, for example, a cylinder lock or a shaft with a handle or knob at at least one end. In any case, the operating element has an engagement element that rotates around an axis perpendicular to the housing's mounting surface and engages with the gear mechanism. This rotational movement is then transferred to the locking element, allowing it to be moved between a locked and unlocked position.

[0004] Most apartment doors have a double-walled door leaf, with a cavity between the two walls to house the lock mechanism. In contrast, with a single-walled door, such as a glass door, the lock mechanism is located on an outer surface. To prevent the mechanism from protruding too far from the door leaf, efforts are made to minimize its thickness, i.e., the distance between the two parallel walls. Because the guide element engages in the handle recess of the door leaf, the guide channel can be longer, ensuring stable guidance of the locking mechanism.

[0005] To ensure that the same lock can be used for both left- and right-hinged doors, or for sliding doors that open to the left and right, the lock itself should be symmetrical. The operating mechanism, however, is not always symmetrical. For example, a lock cylinder is usually asymmetrical because the corresponding key has a smooth back on one side and a bit on the other. Users are accustomed to inserting the key into the cylinder so that the smooth back faces a certain direction, such as upwards. In principle, to adapt it to left- or right-hinged doors, the lock could simply be rotated 180° around its operating axis. However, this would require inserting the key into the cylinder "upside down." The locking mechanism is also often asymmetrical with respect to a horizontal plane, for example, in the case of hook locks.For these reasons, known locks exhibit mirror symmetry with respect to a (vertical) plane of symmetry that is parallel to the mounting surface of the housing. This implies that the guide element projects symmetrically from both opposite surfaces of the housing.

[0006] The purpose of the invention is to create a more compact lock.

[0007] This problem is solved according to the invention by making the guide element adjustable in the direction perpendicular to the contact surface between two positions in which it projects from one of the parallel walls on opposite sides of the housing.

[0008] The lock according to the invention is therefore asymmetrical in its installed state because the guide element projects only on one side, namely the side facing the hole in the door leaf. On the opposite side, the housing can be essentially smooth, so that it only needs to be slightly raised above the surface of the door leaf. To adapt it to right- or left-hinged doors, the housing is simply rotated 180° about an axis parallel to the mounting surface, and the guide element is adjusted to the respective other position.

[0009] Advantageous embodiments of the invention are specified in the dependent claims.

[0010] In one embodiment, the lock has a counter plate on the side of the door leaf facing away from the housing, which is connected to the housing via the guide element. In this case, the guide element can be displaceable between two end positions defined by stops, and the guide element is only fully fixed by firmly connecting it to the counter plate, for example by screwing it in place.

[0011] The following section explains an exemplary embodiment in more detail with reference to the drawing.

[0012] They show: Fig. 1 an exploded view of a lock according to the invention on a single-walled door leaf; Fig. 2 a floor plan of a housing and a guide element of the lock; Fig. 3 the lock in its mounted state on a left-hinged door leaf; and Fig. 4 the lock in mounted state on a right-hinged door leaf.

[0013] In Fig. Figure 1 shows a horizontal partial section of the edge region of a single-walled door leaf 10, which has a hole 12 near its edge through which an actuating element 14 of the lock extends. In the example shown, the actuating element 14 is a locking cylinder. Alternatively, it could also be a shaft with a knob at at least one end, or a combination of a knob and a locking cylinder. The lock has a housing 16 and a strike plate 18, which bear against opposite surfaces of the door leaf 10 with the insertion of damping plates 20. The damping plates 20 are rubber-elastic and prevent excessive mechanical stresses from occurring in the door leaf 10 when the housing 16 and the strike plate 18 are firmly clamped against the door leaf from opposite sides.

[0014] The housing 16 has the shape of a relatively flat disc with two parallel walls 22, 24. The in Fig. 1 The upper wall 22 of the housing forms a contact surface 26 in the installation situation shown here, which is supported on the surface of the door leaf 10 via the associated damping plate 20.

[0015] The lock has a locking element 28, which in the example shown has the form of a hook. In its locked position, this hook engages a part of a door frame (not shown), thus locking the door leaf to the door frame. Inside the housing 16 is a gear mechanism 30, which engages with an engagement element 32 of the actuating element 14. The engagement element 32 can be pivoted within a limited angular range about an actuating axis A that runs perpendicular to the contact surface 26 (for example, by means of a key inserted into the lock cylinder). The pivoting movement of the engagement element 32 is converted by the gear mechanism 30 into an adjusting movement of the locking element 28, which can thus be moved between its locked position and an unlocked position in which it is retracted into the housing 16.

[0016] A guide element 34 is arranged in a continuous opening in the housing 16, which is aligned with the hole 12 in the door leaf 10. This guide element forms a continuous guide channel 36 for the actuating element 14 in the direction of the actuating axis A. The actuating element 14 is thus tightly enclosed by the guide element 34, which is itself held in the housing 16, ensuring a stable seating of the actuating element 14 within the housing.

[0017] The guide element 34 projects beyond the mounting surface 26 on one side of the housing, so that the length of the guide channel 36 is greater than the thickness of the housing 16. When the housing 16 is tightly fitted against the door leaf 10, the projecting part of the guide element 34 protrudes into the hole 12 of the door leaf.

[0018] At one point along its circumference, the guide element 34 is interrupted by a window for the engagement element 32 of the actuating device. Outside the plan view of the guide channel 36, the guide element 34 has through-holes for fastening screws 38, which can be screwed into a thickened portion 40 of the counter plate 18. By tightening the fastening screws 38, the housing 16 and the counter plate 18 can thus be clamped firmly against the door leaf 10. The heads of the fastening screws 38 are countersunk in the surface of the guide element 34 and, after the lock is mounted on the door leaf, are covered by a cover plate 42, which is held on the housing 16 in some suitable manner, for example by a snap-fit.

[0019] The counter plate 18 has a centering projection 44 which, when mounted, engages in the hole 12 of the door leaf 10, so that when the lock is mounted, the protruding part of the guide element 34 and the centering projection 44 protrude into the hole 12 from opposite sides.

[0020] The guide element 34 is slidably guided in the housing 16 parallel to the actuating axis A and has a circumferential collar 46 or 48 at both ends of the guide channel 36. In the Fig. In the state shown in Figure 1, the collar 48, together with the wall 24 of the housing, forms a stop that limits the displacement of the guide element when the fastening screws 38 are tightened. However, as long as the guide element 34 is not yet connected to the counter plate 18, it can be moved into the position shown in Figure 1. Fig. Move the collar 46 to the position indicated by the dashed line, where it rests against the wall 22 of the housing. The fastening screws 38 can also optionally be inserted into the corresponding screw holes from the opposite side, as shown in Fig. 1 is also indicated by a dash.

[0021] In Fig. Figure 2 shows the housing 16 and the guide element 34 in plan view. The heads of the two fastening screws 38 and the outline of the guide channel 36, which is adapted to the shape of the actuating element 14 (locking cylinder), are visible. The hook-shaped design of the locking element 28 is also visible. The elements (interlocking levers) of the gear mechanism 30 housed in the casing are shown with dashed lines.

[0022] Fig. Figure 3 shows the lock in its mounted state on the door leaf 10, which is a left-hinged door leaf. The locking element 28 is accordingly located on the right edge of the door leaf.

[0023] Fig. Figure 4 shows the same lock in the mounted state on a right-hinged door leaf 10'. The locking element 28 must therefore now be located on the left edge of the door leaf.

[0024] To adapt the lock to this installation situation, the guide element 34 is moved into the position shown in Fig. 1 is shown with a dashed line. The housing 16, which is a mirror image with respect to a plane parallel to the mounting surface 26, is then rotated 180° about an axis that is in Fig. 3 runs perpendicular to the drawing plane. This brings the guide element 34 back into a position ( Fig.4), in which it projects upwards into the hole of the door leaf 10' in the drawing. The contact surface for the door leaf is now formed by the wall 24 on the housing 16. The actuating element 14, already installed in the guide element 34, is rotated together with the housing 16. The counter plate 18 and the cover plate 42 are symmetrically designed and thus reach their new position by being rotated 180° about an axis parallel to the actuating axis A.

Claims

[1] Lock for a single-walled door leaf (10; 10'), with a housing (16) having two parallel walls (22, 24), one of which forms a bearing surface (26) for resting against the door leaf (10; 10'), and with a guide element (34) forming a guide channel (36) for an actuating element (14) for actuating the lock and which projects from the bearing surface (26) and, in the mounted state, extends into a hole (12) in the door leaf, characterized by , that the guide element (34) is adjustable in the direction perpendicular to the mounting surface (26) between two positions in which it projects from one of the parallel walls (22, 24) on opposite sides of the housing (16). [2] Lock according to claim 1, with a counter plate (18) which, in the assembled state, rests on the side of the door leaf (10; 10') opposite the housing (16) and which can be connected to each of the two ends of the guide element (34) in a tensile-resistant manner. [3] Lock according to claim 2, with fastening screws (38) which can be inserted from opposite sides through screw holes of the guide element (34) running parallel to the guide channel (36) and screwed into the counter plate (18). [4] Lock according to one of the preceding claims, wherein the guide element (34) is slidably guided in the housing (16), the displacement path being limited by stops. [5] Lock according to claim 4, wherein the guide element (34) penetrates the two parallel walls (22, 24) of the housing (16) and has a radially projecting collar (46, 48) at each end which together with one of the parallel walls (22, 24) of the housing (16) forms one of the stops. [6] Lock according to claim 5, comprising a cover plate (42) for covering the end of the guide element (34) facing away from the door leaf (10; 10'). [7] Lock according to claim 2 or 6, wherein the counter plate (18) and / or the cover plate (42) have 180° rotational symmetry with respect to an axis perpendicular to the contact surface (26).

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