MOTOR VEHICLE, IN PARTICULAR MOTOR VEHICLE DOOR LOCK

Abstract

The invention relates to a motor vehicle lock, in particular a motor vehicle door lock, which is equipped with a locking mechanism (1, 2) composed, essentially, of a rotary latch (1) and a pawl (2). Furthermore, a securing device (5, 6, 7, 8) and and an emergency actuation element (9, 10, 11) for the securing device are realized. The securing device (5, 6, 7, 8) has at least one securing lever (5), which can be acted upon both by a first motor drive (7) and by an emergency actuation lever (10) as part of the emergency actuation element (9, 10, 11). According to the invention, the first securing lever (5) has a spring (5a) for positioning the first securing lever.

Claims

1. A motor vehicle latch comprising: a locking mechanism having a catch and a pawl, a securing device, and an emergency actuation element for the securing device, the securing device having a first securing lever acted upon both by a motor drive and by an emergency actuation lever component of the emergency actuation element, wherein the first securing lever has a spring for being positioned in any one of functional positions including “anti-theft device ON” and “anti-theft device OFF,” and the securing device further having a second securing lever, the first securing lever being designed as an anti-theft securing lever and the second securing lever being a central locking lever, the two securing levers being mounted on a same axis of rotation.

2. The motor vehicle latch according to claim 1, wherein the first securing lever and the spring are made of a same plastics material.

3. The motor vehicle latch according to claim 1, wherein the first securing lever has a guide groove for a housing pin.

4. The motor vehicle latch according to claim 3, wherein the guide groove has an enlarged cross section in a region of each of two end positions of the first securing lever.

5. The motor vehicle latch according to claim 4, wherein the guide groove is delimited in its longitudinal extension on one side by a radially inner stop wall with respect to an axis of rotation of the securing lever and, on an opposing side, by a radially outer spring wall.

6. The motor vehicle latch according to claim 5, wherein the stop wall and the spring wall are each formed in a shape of a circular arc with respect to the axis of rotation.

7. The motor vehicle latch according to claim 5, wherein the spring wall, in a region of the two end positions of the securing lever, is reinforced with material thickening in comparison with a connection region between the two end positions.

8. The motor vehicle latch according to claim 1, wherein the securing lever has a stop for the emergency actuation element.

9. The motor vehicle latch according to claim 8, wherein the stop interacts with a pin of the emergency actuation element.

10. The motor vehicle latch according to claim 9, wherein the pin passes through an opening in the second securing lever and is mounted coaxially with respect to the first securing lever.

11. The motor vehicle latch according to claim 8, wherein the pin is made of a plastics material.

12. The motor vehicle latch according to claim 1, wherein the motor vehicle latch includes a first motor drive that acts as an anti-theft drive by acting on the first securing lever, and a second motor drive that acts as a central locking drive by acting on the central locking lever.

13. The motor vehicle latch according to claim 1, wherein the emergency actuating element comprises an actuating nut, and the emergency actuating lever is pivotally connected to the actuating nut.

14. The motor vehicle latch according to claim 13, wherein the actuating nut is an external locking nut that permits externally releasing the lock.

15. The motor vehicle latch according to claim 13, wherein the emergency actuating element further comprises an actuating pin located at an end of the emergency actuating lever oppositely from the actuating nut.

Description

[0027] The invention is explained in greater detail below with reference to drawings, which show only one example of an embodiment. In the drawings:

[0028] FIG. 1 shows the motor vehicle lock according to the invention in the form of a motor vehicle door lock, in a schematic overview,

[0029] FIG. 2 shows the object according to FIG. 1 in the installed state in a housing, in a detailed view in the region of the securing device, and

[0030] FIG. 3 shows the securing lever in a further detail.

[0031] FIG. 1 shows a motor vehicle lock which, according to the exemplary embodiment, is designed as a motor vehicle door lock, and may be implemented, for example, on a front or rear side door of an associated motor vehicle. The motor vehicle lock has a locking mechanism 1, 2 consisting substantially of a rotary latch 1 and pawl 2, which are arranged predominantly perpendicular to the plane of the drawing in the context of the illustration. An actuation lever linkage 3, 4 and a securing device 5, 6, 7, 8 are also important for the following descriptions. Finally, there is an emergency actuation element 9, 10, 11.

[0032] According to the exemplary embodiment, the securing device 5, 6, 7, 8 has at least one securing lever 5, 6. In fact, two securing levers 5, 6 are implemented according to the exemplary embodiment, namely a first securing lever 5 and a second securing lever 6. According to the exemplary embodiment, the first securing lever 5 is designed as an anti-theft securing lever 5, whereas the second securing lever 6 is a central locking lever 6. Both securing levers 5, 6 are, as shown in FIG. 1, mounted coaxially, i.e. on the same axis, about an axis of rotation A. In addition, the design is such that the central locking lever 6 is arranged above the anti-theft lever 5 when viewed from above.

[0033] The securing device 5, 6, 7, 8 then also includes at least one motor drive 7, 8. According to the exemplary embodiment, two motor drives 7, 8 are included. The first drive 7 works on the first securing lever 5, while the second drive 8 interacts with the second securing lever 6. The first motor drive 7 is an anti-theft drive, by means of which the first securing lever or anti-theft lever 5 can pivot about its axis or the axis of rotation A. In contrast, the second motor drive or central locking drive 8 ensures that the second securing lever 6 or central locking lever 6 is also subjected to pivoting movements about the shared axis and/or axis of rotation A.

[0034] In the following, the first securing lever or central locking lever 5 is primarily considered, as can be understood from FIGS. 2 and 3. The first motor drive or anti-theft drive 7, in the “anti-theft device ON” position, ensures that the locking mechanism 1, 2 cannot be opened either via an internal actuation lever 3 or an external actuation lever 4, which are essential components of the actuation lever linkage 3, 4. In contrast, the position “anti-theft device OFF” means that the locking mechanism 1, 2 can be opened both via the internal actuation lever 3 and the external actuation lever 4.

[0035] FIG. 2 shows that the securing lever or first securing lever 5 and/or the anti-theft lever 5 in the exemplary embodiment, has a spring 5a for its positioning, which can also be understood in particular from the detailed representation according to FIG. 3. The spring 5a is made of the same material as the securing lever 5, because the securing lever 5 is made of a plastics material according to the exemplary embodiment—for example, it is designed as a plastic injection molded part. The securing lever 5 has a guide groove 5c into which a housing pin 12′ engages. The housing pin 12′ is molded onto a lock housing 12, which is also made of a plastics material.

[0036] The detail view in FIG. 3 shows that the guide groove 5c of the securing lever 5 has two end positions, and has an enlarged cross section in this region. These two end positions are shown in FIG. 3 by a solid and dashed illustration of the housing pin 12′ plunging into the guide groove 5c.

[0037] In fact, the guide groove 5c is delimited in its longitudinal extension on the one hand by a stop wall 5b, and on the other hand by a spring wall 5a, as a spring 5a. The overall design is such that the stop wall 5b of the guide groove 5c is arranged radially inwards in relation to the axis of rotation A of the securing lever 5, while the spring wall 5a is arranged radially outwards in relation to the axis of rotation A. The stop wall 5b and the spring wall 5a are each formed in an arc shape with respect to the axis of rotation A.

[0038] The detail view of FIG. 3 also shows that the spring wall 5a, in the region of the two end positions of the securing lever 5, is made of material which is thicker in comparison to a connection region 5d connecting the two end positions to each other. The securing lever 5 also has a limit stop 5e for the emergency actuation element 9, 10, 11. In fact, the emergency actuation element 9, 10, 11 consists of an actuation nut or emergency actuation nut 9, and an emergency actuation lever 10. The emergency actuation lever 10 is pivotably connected to the actuating nut 9. In addition, the emergency actuation lever 10 has a pin 11, the end of which is connected to the emergency actuation lever 10 according to the exemplary embodiment. Rotational movements of the actuating nut 9 consequently result in the emergency actuation lever 10, and with it the pin 11 at the end, being moved back and forth linearly.

[0039] The pin 11, as part of the emergency actuation element 9, 10, 11, can interact overall with the limit stop 5e on the securing lever 5. In this way, rotary movements of the actuating nut 9 lead to the securing lever 5 being manually transferred at least into the end position, which corresponds to the “anti-theft device OFF” position. In this way, by means of the emergency actuation element 9, 10, 11, the anti-theft lever 5 in the exemplary embodiment can be moved to the “OFF” position, and consequently the external locking can be released. An associated motor vehicle door can then easily be opened from the outside even if the motor drive 7 has failed.

[0040] A comparison of FIGS. 1 and 2 makes it clear that the pin 11 at the end of the emergency actuation lever 10 passes through an opening 13 in the second securing lever or central locking lever 6. As a result, the emergency actuation element 9, 10, 11 can easily transfer the anti-theft lever or first securing lever 5 to the “OFF” position, regardless of the position of the second securing lever or central locking lever 6. As a result, the external locking is released as desired, and the associated motor vehicle door can be opened from the outside.

REFERENCE SIGNS

[0041] 1 rotary latch

[0042] 2 pawl

[0043] 3 internal actuation lever

[0044] 4 external actuation lever

[0045] 5 anti-theft lever

[0046] 5a spring wall

[0047] 5b stop wall

[0048] 5c guide groove

[0049] 5d connection region

[0050] 5e limit stop

[0051] 6 central locking lever

[0052] 7 anti-theft drive

[0053] 8 central locking drive

[0054] 9 actuating nut/emergency actuating nut

[0055] 10 emergency actuation lever

[0056] 11 pin

[0057] 12 lock housing

[0058] 12′ housing pin

[0059] 13 opening

[0060] A axis of rotation