The invention relates to a closing device for a cover of a motor vehicle of the type indicated in the preamble of claim 1.
Such a closing device has already been disclosed in DE 101 48 639 A1; a front hood is to be fixed by way of the closing device on the front structure of the vehicle body. For this purpose the closing device has a rotary latch which interacts with a cover-side locking clamp and which is held securely in its closed position by means of a spring-loaded pawl. To open the hood the pawl can be transferred against the spring force of the spring element to a release position, after which the pawl which has likewise been pretensioned via a spring element is to be moved into an open position. By means of a lock ejection spring the locking clamp and the entire hood is to be transferred to a holding position which is elevated relative to the front structure until a catch hook assigned here to the pawl engages the locking clamp which is used here as the catch element. This holding position of the catch hook and hood ensures that it does not completely open when the closing device is unintentionally actuated, but rather simply by a small vertical amount relative to the front structure. When the hood is intentionally opened conversely the catch hook must be transferred manually out of the holding position into the open position in which the locking clamp is released in order to thus open the hood completely.
The disadvantage in this known closing device is considered to be the circumstance that the catch hook as part of the pawl can only be transferred into its open position by an operator effecting manual intervention from the front, with the vehicle stopped.
The object of this invention is therefore to improve a closing device of the initially mentioned type such that it can be used in a more versatile manner.
This object is achieved according to the invention by a closing device with the features of claim 1. Advantageous embodiments with effective and nontrivial developments of the invention will follow from the dependent claims.
According to the invention, the closing device intended for this purpose comprises a rotary latch and catch hook which are made as separate parts, and the pawl of the rotary latch and the catch hook are to be actuated in succession via a common remote actuation element, for example in the form of a Bowden cable, in a sequence. In other words, it is easily possible in this way under certain circumstances which will be described below in particular, to operate the catch hook via the same remote actuation element with which the pawl of the rotary latch is to be moved into a releasing open position. Thus the closing device according to the invention enables the emergency release on the catch hook lever 44 of the cover for example of a trunk which is closed or covered by it on the front end of the vehicle. This yields an especially simple configuration of the closing device based on the fact that the same remote actuation element, for example in the form of a Bowden cable, can be used both for unlocking the pawl of the rotary latch and also for transferring the catch hook into its open position.
A remote actuation element made as a Bowden cable, with its cord connected to the pawl and with its jacket connected to the catch hook, offers a simple and reliable possibility for actuating the pawl and the catch hook in chronological sequence after one another. If the jacket of the cord is supported on the lever of the catch hook, the relative motion of the cord compared to the jacket of the Bowden cable can be easily used to transfer the catch hook out of the holding position into the open position. The sequence of actuation of first the pawl of the rotary latch and then of the catch hook can be ensured very easily by the actuating force of the pawl being made smaller than that of the catch hook lever. Thus the sequence of actuating the pawl and then the catch hook lever can be easily implemented by first of all, due to the higher actuating force, the jacket of the Bowden cable being held stationary on the catch hook, while its cord which is connected to the pawl, due to the lower actuating force, is to be moved relative to the jacket and the catch hook. After the pawl has been transferred into its open position by the motion of the cord, in a second step the jacket can be moved relative to the cord and accordingly the catch hook is transferred into its open position. An especially defined open position of the pawl can be easily implemented by an end stop on which the pawl can be supported, after which the cord is secured in place. Further actuation of the Bowden cable leads conversely to the movement of the jacket which is desired according to the invention relative to the cord of the Bowden cable. Thus in a second step the jacket is pushed relative to the then stationary cord such that the catch hook lever transfers the catch hook into its open position.
The cord should optionally be able to be moved relative to the jacket which is held stationary by the catch hook lever in order to release the pawl, but subsequently it should not be possible to move the jacket relative to the then stationary cord which would then lead to transfer of the catch hook into the open position. This can be the case for example when the driving speed of the vehicle is too high, and accordingly opening of the pawl is desirable, but not opening of the catch hook. Therefore in another embodiment of the invention it is advantageously shown that a blocking means be provided with which actuation of the catch hook can be stopped depending on the driving speed of the vehicle.
This actuation of the catch hook can be especially easily stopped by the blocking means stopping the movement of the jacket relative to the cord in the second step. If conversely within the front trunk of a vehicle for example there is an emergency release, depending on the driving speed either the pawl and the catch hook or simply the pawl can be released, the catch hook then remaining in its holding position.
Versatile use of the closing device according to the invention can also be implemented especially in that in addition to the remote actuation element for the emergency release of the closing device from a front trunk, there is another remote actuation means with which the pawl of the rotary latch is to be transferred into its open position. This further remote actuation means can be activated for example via a remote control button on the vehicle lock or a button in the vehicle interior. In this connection the catch hook can be located within the closing device such that it is to be transferred manually out of the holding position into the open position independently of the remote actuation element.
Finally, an especially simple closing device can be achieved by both the pawl of the rotary latch and the catch hook after actuation by means of the remote actuation element automatically traveling back into its closed position or holding position.
Other advantages, features and details of the invention will become apparent from the following description of one preferred embodiment and using the drawings.
Furthermore the closing device comprises a catch hook 20 which is made separately from the rotary latch 14, said catch hook being supported on the locking clamp plate 12 so as to be able to pivot around a pivoting axis SF, and mounted laterally from the housing 16 of the rotary latch 14. The catch hook 20 can be actuated via a catch hook lever 22 which is shown in
Both the rotary latch 14 and also the catch hook lever 22 of the catch hook 20 are to be actuated via a common remote actuation element in the form of a Bowden cable 24, on the end of which facing the pawl 14 and the catch hook lever 22 there is a handle 28 held within the housing 26. The housing 26 with the handle 28 is held within the trunk lining on the front end of the vehicle and is used for an emergency release of the lid from the trunk in a manner which will be detailed below.
Moreover, in
Transfer of the pawl 34 out of the locking or closed position shown by the solid line into its released or open position indicated with the dot-dash line is effected by means of the cord 36 of the Bowden cable 24 which in the region of a mounting opening 38 acts on the pawl 34. When the pawl 34 is moved out of its closed position into its open position, a spring element 40 is pretensioned via which the pawl 34 after the closing process travels back into its closed position with the cord 36 accordingly untensioned.
If the pawl 34 is actuated accordingly by means of the cord 36 of the Bowden cable 24 and the rotary latch 34 travels accordingly into its open position, the catch hook 20 drifts out of its lower position shown in
In order to transfer the catch hook 20 out of its holding position which engages the catch element 42, shown by the solid lines, into its open position shown by the dot-dash line, in which the catch hook 20 is no longer engaged with the catch element 42, a catch hook lever 44 must be actuated which for its part is pivoted around a pivoting axis SH. On its side facing away from the catch hook 20, the tube mount or jacket 46 of the Bowden cable 24 is supported on the catch hook lever 44. Proceeding from the catch hook lever 44 then the cord 36 of the Bowden cable 24 runs toward the pawl 34. If the catch hook lever 44 is transferred in a manner to be detailed below by means of the jacket 46 out of the closed position shown by the solid line into an open position shown by the dot-dash line, in this way the catch hook 20 is likewise transferred out of its upper holding position which is engaged with the catch element 42 into the open, disengaged position. For this purpose, on the end of the catch hook lever 44 which faces away from the jacket 46 a guide part 48 is attached which interacts with a laterally projecting pin 50 on the catch hook 20. With the corresponding actuation of the catch hook lever 44 conversely the catch hook 20 is transferred via the pin 50 out of the holding position into the open position. On the catch hook lever 44 with one end a spring element 52 is attached which is pretensioned when the catch hook lever 44 is transferred out of its closed position shown by the solid lines into the open position which is shown by the dot-dash line.
If accordingly the Bowden cable 24 is actuated by means of a handle 28, the two spring elements 40 and 52 are designed such that first of all based on the low actuating force the pawl 34 is transferred by means of the cord 36 of the Bowden cable 24 out of its closed position shown in
Since the pawl 34 has been pivoted into its open position, it is supported after actuation with the cord 36 on its end stop 54, so that the cord 36 of the Bowden cable 24 is now secured to be stationary. As is to be seen in
As is apparent from looking at FIGS. 2 to 4 together, remote actuation of the pawl 34 and of the catch hook lever 44 and of the catch hook 20 is effected accordingly in a sequence which is dictated by the different actuating forces of the spring element 40 and 52 of the pawl 34 and of the catch hook lever 44. In this sequence accordingly first the pawl 34 is moved by means of the cord 36 in that the jacket 46 is held stationary on the catch hook lever 44. After the pawl 34 has reached its open position which holds the cord 36 stationary, in the second step of the sequence the jacket 46 of the Bowden cable 24 is moved relative to the cord 36. This yields the desired sequence according to the invention, that is first of all the opening of the rotary latch 14 and then the transfer of the catch hook 20 out of its holding position into a release position disengaged from the catch element 42. In other words, it is possible according to the invention from the trunk on the front end of the vehicle by means of the handle 28, under certain circumstances to be detailed below, first of all to transfer the rotary latch 14 and then the catch hook 20 into a open position, so that an individual trapped within the trunk can escape from the vehicle and the trunk.
If the driving speed of the vehicle conversely is less than 5 km/h, the electromagnet of the blocking means 58 is not energized and the blocking clamp 60 does not stop motion of the jacket 46 of the Bowden cable 24. Thus, at driving speeds less than 5 km/h the movement of the jacket 46 explained with reference to
In addition to actuation by means of the handle 28 of the Bowden cable 24, the pawl 34 and the rotary latch 14 is also to be opened in the conventional manner by means of the positioning element 30 which is to be actuated for example via a remote control button on the vehicle key or a button within the vehicle. The holding position of the catch hook 20 can then be cancelled by means of a handle with the vehicle stationary or the catch hook 20 can be transferred into the open position so that the trunk becomes accessible on the front end of the vehicle.
After actuating the pawl 34 and the catch hook element 44 and the catch hook 20 by means of the Bowden cable 24, they travel automatically back into their closed position or holding position.
Number | Date | Country | Kind |
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10 2006 012 062.0 | Mar 2006 | DE | national |