Door lock

Abstract

The invention relates to a door lock with a locking element (1) for locking the door (3) in a closed state and a fastening element (2) for fastening the locking element (1) to the door (3), wherein that the fastening element (2) has an adjustable adjustment device (4) to compensate for different door thicknesses.

Claims

1. A door lock comprising: a locking element for locking the door in a closed state, the locking element including a locking tongue configured to be rotated by a door handle of the door about an axis of rotation extending perpendicular to an outer surface of the door; and a fastening element for fastening the locking element to the door, the fastening element is an annular ring configured to be seated on the locking element and on the outer surface of the door with the axis of rotation extending through a radial center of the annular ring; wherein the fastening element has an adjustable adjustment device to compensate for different door thicknesses; wherein the adjustment device has at least one ramp section having a slope, which ramp section interacts with a latching element of the locking element when the fastening element is rotated about the axis of rotation against the outer surface of the door from an assembly position to a latching position, in the latching position the adjustment device is secured between the latching element and the outer surface of the door; and wherein the latching element projects from an outer circumference of the locking element, the outer circumference is a bearing element for the fastening element during rotation of the fastening element about the axis of rotation from the assembly position to the latching position.

2. The locking device according to claim 1, wherein the fastening element is part of a bayonet fastening.

3. The locking device according to claim 1, wherein the fastening element is pressable onto the door via the adjustment device.

4. The locking device according to claim 3, wherein a contact pressure of the fastening element onto the door is adjustable via the adjustment device.

5. The locking device according to claim 3, wherein a contact pressure can be adjusted by rotating the fastening element relative to the locking element.

6. The locking device according to claim 1, wherein the locking element moves in axial direction relative to the fastening element when the fastening element is rotated.

7. The locking device according to claim 1, wherein the adjustment device has a latching section for fixing the fastening element relative to the locking element.

8. The locking device according to claim 7, wherein the latching section has several latching steps.

9. The locking device according to claim 1, wherein the fastening element has an actuation area via which the fastening element can be rotated.

10. The locking device according to claim 1, in which the degree of slope of the ramp section determine a transmission ratio between the rotation of the fastening element and a change of a contact pressure of the fastening element onto the door.

11. The locking device according to claim 1, in which the ramp section extends in direction of a circular arc.

12. A door with a locking device according to claim 1.

13. A method comprising: fastening a locking element to a door with a fastening element, wherein the locking element includes a locking tongue configured to be rotated by a door handle of the door about an axis of rotation extending perpendicular to an outer surface of the door, wherein a contact pressure of the fastening element onto the door is adjusted via an adjustment device of the fastening element to compensate for different door thicknesses, in that at least one ramp section of the adjustment device interacts with a latching element of the locking element when the fastening element is rotated about the axis of rotation against the outer surface of the door from an assembly position to a latching position, in the latching position the adjustment device is secured between the latching element and the outer surface of the door; wherein the fastening element is an annular ring configured to be seated on the locking element and on the outer surface of the door with the axis of rotation extending through a radial center of the annular ring; and wherein the latching element projects from an outer circumference of the locking element, the outer circumference is a bearing element for the fastening element during rotation of the fastening element about the axis of rotation from the assembly position to the latching position.

14. The method according to claim 13, in which the latching element is moved away from the door in axial direction when the fastening element is rotated from the assembly position into the latching position.

15. The method according to claim 13, in which the latching element slides along a ramp section of the adjustment device when the fastening element is rotated.

16. A door lock comprising: a locking element for locking the door in a closed state, the locking element including: a locking tongue configured to be rotated by a door handle of the door about an axis of rotation extending perpendicular to an outer surface of the door; a bearing element aligned along the axis of rotation; and a latching element extending outward from an outer circumference of the bearing element; and a fastening element for fastening the locking element to the door, the fastening element is an annular ring configured to be seated on the bearing element and on the outer surface of the door with the axis of rotation extending through a radial center of the annular ring, the fastening element including: an adjustment device that is adjustable to compensate for different door thicknesses, the adjustment device including at least one ramped surface that cooperates with the latching element of the locking element when the fastening element is rotated about the axis of rotation against the outer surface of the door from an assembly position to a latching position, in the latching position the adjustment device is secured between the latching element and the outer surface of the door; wherein: the bearing element is a bearing for the fastening element during rotation of the fastening element from the assembly position to the latching position; the locking element and the fastening element cooperate as a bayonet lock; and the fastening element is annular.

Description

(1) Further advantageous designs are explained in more detail below with help of FIG. 1 to 4. These show:

(2) FIG. 1a to 1c Views of an assembly sequence for fastening a locking element with a fastening element to a door in three different positions;

(3) FIG. 2a, b a perspective view and a top view of a fastening element;

(4) FIG. 3 a perspective view of a door lock in the assembly position;

(5) FIG. 4 a perspective view of the door lock according to FIG. 3 in the fastening position.

(6) Door locks 10 usually consist of a locking element 1 with which a door 3 can be secured against undesired opening and a fastening element 2 with which the locking element 1 can be attached to the door 3.

(7) For the purposes of this invention, the term “door” is generally understood to mean closing elements which can be moved back and forth between an open position and a closed position. In addition to normal swing or sliding doors, flaps, hatches, lids, windows and the like are therefore also covered by this term.

(8) As will be explained in more detail below, door locks are subject to problems during assembly when the door locks are not adapted to the thickness of door 3. In the following, this will be briefly explained on the basis of the assembly steps shown in FIGS. 1a to 1c, before the inventive embodiment of door lock 10 will be discussed.

(9) For the assembly of locking element 1, door 3 has an opening 3.3, through which locking element 1 can be inserted from the outside of door 3, as shown in the illustration in FIG. 1a. Locking element 1 has a bearing area in the form of a rosette 1.3 not shown in FIGS. 1a to 1c, which in the inserted position rests on the outside of door 3. This rosette 1.3 can be seen in FIGS. 3 and 4, in which the door 3 in front of rosette 1.3 is hidden for purposes of illustration. Rosette 1.3 is used to fix the locking element 1 in one direction so that it cannot be moved further towards the inside. Furthermore, locking element 1 has a locking tongue 1.2, which is formed as a cam in the exemplary embodiment. Locking tongue 1.2 can be swivelled about the axis of rotation D by means of a handle located on the outside of door 3.1 which is not shown in the figures. In the locked position, when door 3 is closed, locking tongue 1.2 engages behind the frame of door 3.4 so that door 3 is secured against unintentional opening. In order to open door 3 again, locking tongue 1.2 must be rotated about the axis of rotation D from the locked position back to the unlocked position, in which locking tongue 1.2 can be moved past frame 3.4 when door 3 is opened. Furthermore, the locking element 1 has a bearing element 1.1 formed as a bushing, which extends through the opening 3.3 of door 3 as shown in FIG. 1a and in which the locking tongue 1.2 is pivotally mounted.

(10) In order to now connect locking element 1 to door 3 in the position according to 1a and secure it against being pulled out, the fastening element 2 is put over locking element 1 until it rests on the inside of door 3.2, as shown in FIG. 1b.

(11) The bearing element 1.1 of locking element 1 has radially extending projections in the form of latching elements 9 on two opposite sides and the fastening element 2 has two correspondingly shaped and mutually opposing recesses 8, which can be best seen in FIG. 2b. To assemble the fastening element 2, it is arranged in such a way that the latching elements 9 are aligned with the recesses 8 and the fastening element 2 can be pushed forward via the latching elements 9 to the inside of the door 3.2, as can also be seen in the other FIGS. 1b and 1c.

(12) There is a certain distance between the latching element 9 and the inside of the door 3.2, so that there is enough space remaining to rotate the fastening element 2. For better handling, the fastening element 2 has a radially projecting actuation area 12. The locking element 1 and the fastening element 2 interact in the manner of a bayonet lock, so that the recesses 8 no longer align with the latching elements 9 after a rotation of the fastening element, but undercut the fastening element 2. Since the fastening element 2 has a larger cross-section than the opening, the locking element 1 is secured against being pulled out.

(13) However, for the fastening element 2 shown in FIGS. 1a to 1c, the problem arises that the space between the latching element 9 and the inside of door 3.2 is dependent on the thickness of door 3. When, for example, the door 3 is too thick, the locking element 1 and therefore also the latching elements 9 do not protrude far enough beyond the inside of the door 3.2, so that there is not enough space between the inside of the door 3.2 and the latching elements 9 for the fastening element 2. In this case, it can happen that the fastening element 2 has to be clamped with a lot of force between the door 3 and the latching element 9, which can easily lead to scratches on the door 3 or that it is not possible to assemble the locking element 1 with the fastening element 2. On the other hand, when the door 3 is too thin there is a certain gap between the door 3 and the fastening element 2 and also between the locking element 9 and the fastening element 2.

(14) The fastening element 2 shown in the figures has an adjustment device 4 for this purpose, which can be best seen in FIG. 2a and which allows adaptation to different door thicknesses by means of different latching steps. In the following, the embodiment of fastening element 2 and adjustment device 4 will be described in more detail using FIGS. 2 to 4.

(15) The adjustment device 4 has two ramp sections 5 extending in the direction of a circular arc, which, when the fastening element 2 is rotated around the locking element 1, lead to a continuous increase in the contact pressure acting on the door 3. The latching elements 9 move along the ramp sections 5 when the fastening element 2 is rotated, so that the distance of the latching elements 9 from the door 3 increases when rotating. This causes the fastening element 2 to be pressed from the inside of the door 3 and the rosette 3.1 from the outside of the door 3 onto the door 3, so that a frictional connection is created between the elements.

(16) In addition, the adjustment device 4 has a latching section 7, which ensures that the fastening element 2 cannot loosen itself again on its own. During assembly, the fastening element 2 is first rotated until the desired contact pressure is applied to the door 3 and the locking element 1 is securely fastened to the door 3. In this fastening position, which is shown in FIG. 4, the fastening element 2 is fixed, which is explained in more detail below.

(17) In order to prevent fastening element 2 from coming loose on its own in the fastening position, both the latching section 7 and one of the two latching elements 9 shown in the figures have correspondingly shaped teeth 7.1, 9.1. By means of teeth 7.1, 9.1 the fastening element 2 can thus be fixed in various latching positions relative to the closing element. As can also be seen, teeth 7.1, 9.1 have a sawtooth-like cross-section which ensures that a rotary movement of fastening element 2 is only possible in one direction. When the fastening element 2 rotates clockwise, the teeth 9.1 of the latching element 9 engage successively in the teeth 7.1 of the latching section 7, so that different latching positions are made possible. An opposite rotation is not possible due to the interaction of teeth 7.1, 9.1.

(18) For the teeth 7.1 of the latching section 7 to be able to interact on their own with the teeth 9.1 of the latching element 9, the latching section 7 is arranged, or pre-loaded respectively, in such a way that the teeth 7.1 engage with the teeth 9.1 on their own, so that self-locking occurs.

(19) In order to release door latch 10 from door 3, the fastening element 2 must be removed from the locking element 1, for which purpose teeth 7.1, 9.1 must first be disengaged. To release the tooth connection, a radial force directed against the pre-load force can be applied to the latching section 7 via the handle 11 formed as a nose, so that the teeth 7.1 of the latching section 7 and the teeth 9.1 of the latching element 9 are disengaged. In this position, the fastening element 2 can then be rotated counterclockwise relative to the locking element 1 until the latching elements 9 are again aligned with the recesses 8. In this position the fastening element 2 can be released from the locking element 1 and the locking element 1 can then be removed from the door 3.

(20) Through the interaction of the latching element 9 with the ramp section 5 as well as with the latching section 7, the fastening element 2 can be adapted to different door thicknesses by a rotation. The distance between the latching element 9 and the inside of door 3.2 can be compensated, resulting in a variable and secure fastening of locking element 1 to door 3.

LIST OF REFERENCE NUMERALS

(21) 1 locking element 1.1 bearing element 1.2 latching tongue 1.3 rosette 2 fastening element 3 door 3.2 door inside 3.3 opening 3.4 frame 4 adjustment device 5 ramp section 7 latching section 7.1 teeth 8 recess 9 latching element 9.1 teeth 10 door lock 11 handle 12 actuating area D axis of rotation