DE102009059881A1 - Door unit for car, has coupling unit transferred from closed state to open state by applying corresponding breakaway force to door wing and retaining open state in accordance with movement of door wing - Google Patents

Abstract

The door unit has a gear rod (3) and a drive shaft (4) connected to a door wing (1) i.e. swing door wing. A coupling unit surrounds the drive shaft and represents a clamping function with variable clamping force, where the coupling unit interacts with the drive shaft. The coupling unit is designed in a mechanically switchable manner, where the coupling unit is transferred from a closed state to an open state by applying corresponding breakaway force to the door wing and retains the open state in accordance with movement of the door wing.

Description

The invention relates to a door unit, in particular motor vehicle door unit, with a connected to a door motion transmission member with drive shaft, and with a coupling member variable closing force to represent a locking function, wherein the coupling member interacts with the drive shaft for this purpose.

A door unit of the construction described above or an associated door lock describes the DE 10 2005 060 709 A1 , The well-known door lock ensures that the door or swing door wing can be held detent in different opening angles relative to a body. However, the detent forces associated therewith are usually low, because an operator should be able to pivot the door manually. Such low detent forces are problematic from various points of view. On the one hand, wind forces can act on the door or the door leaf, for example, and cause an unintentional door opening or door closure. On the other hand, it has recently been found that door leaves are often used as entry or exit aids, in particular by elderly or mobility-impaired persons. In this case too, the known door retainers are not suitable for the bottom line.

Quite independently it describes DE 10 2008 053 087 A1 a door opening limiting device. With the help of this door opening limiting device is to be prevented that a door or an automobile door collides with an obstacle. For this purpose, a blocking device is provided which blocks the door opening process using a sensor. In this way, a collision between the door and the obstacle is prevented. The obstacle is detected by a sensor.

The invention is based on the technical problem of further developing such a door unit and, more particularly, a motor vehicle door unit in such a way that a stepless door locking is realized with a perfect holding function and simple operation taking into account a cost-effective construction.

To solve this technical problem, it is provided in a generic door unit that the coupling member is formed mechanically variable with variable closing force for displaying the locking function, wherein the coupling member is transferred from its closed to its open state by applying the door leaf with a corresponding breakout force and the open Condition maintained in accordance with the movement of the door leaf.

The core element of the door unit according to the invention is thus the coupling member of variable closing force in order to represent the stepless locking function can. In fact, the coupling member is formed switchable, namely mechanically switchable. That is, the switching operation is carried out by mechanical means and, for example, not electronically. In the closed state, the coupling member ensures that the hereby interacting drive shaft of the motion transmission member undergoes a blockage. In the same way then also connected to the motion transmission member door is set. In contrast, the coupling member allows in its open state to unhindered movement of the door leaf. The change from the closed state of the coupling member and consequently blocked door leaf to the open state with freely movable door leaf now happens in accordance with an admission of the door leaf with a corresponding breakout force.

In fact, in order to move the door, the breakaway force in question must first be overcome, which corresponds to the maximum holding force of the door arrester realized in this way by means of the coupling member. That is, in the idle state of the door unit or at dormant door, the coupling member is regularly in its closed state. Consequently, the door is blocked. In order to move the door, now the door wing must be acted upon with the question Losbrechkraft which corresponds to the maximum holding force of the coupling member. By this process, the coupling member goes from its closed state to its open state. The open state of the coupling member is maintained in response to the movement of the door leaf. As long as the door leaf is moved almost force-free in the open state of the coupling member, the coupling member maintains its open state. However, if the speed of the door leaf falls below a predetermined value, then the coupling member (again) goes into the closed state and again ensures a blockage of the door leaf. As a rule, this is the case as soon as the door leaf comes to a complete or near standstill or has come.

To achieve this in detail, a switching device is generally provided. This switching device is assigned to the coupling member or acts on the coupling member and ensures that the coupling member on the one hand assumes its open state and on the other hand its closed state. The design is such that the switching device holds in its position "on" the coupling member in the open state. If, on the other hand, the switching device is in its "off" position, then the coupling member will be in its position closed state transferred. The switching device assumes the "off" position as soon as the movement of the door leaf falls below a predetermined value. In general, this corresponds to the door standing still or standing still.

In order to keep the costs low, the invention favors at this point a mechanical control of the switching device in the "on" and "off" positions. In the same way, the coupling member is transferred purely mechanically from the open state to the closed state. Additional sensors are expressly not required, albeit possible. As a result, a particularly robust, durable and cost-effective construction can be achieved.

The door leaf can basically be acted upon manually by an operator and / or by a motor. In the latter variant, a motor drive for the door is provided, which ensures that, for example, the door is opened or closed. This motor movement of the door leaf can be controlled by an operator, for example by means of a switch. As in the case of manual actuation of the door leaf whose standstill corresponds to the fact that the coupling member assumes its closed state and consequently detects the door leaf. To move the door, the breakaway force of the coupling member - as described - must be overcome again. Either way, a total door locking is realized by means of the switchable coupling member variable clamping force, which holds the door in any position and can also hold. As a result, in particular the loading and unloading process is facilitated, as has already been described in the introduction. In addition, the operator is no longer bound to specific opening angle of the door when entering and exiting. Here are the main benefits.

According to a further advantageous embodiment, the coupling member is equipped with at least one coupling element and a counter-coupling element. The coupling element and the counter-coupling element engage in one another. The mutual engagement of coupling element and counter-coupling element is controlled by the already mentioned switching device. In fact, the switching device ensures that in its position "on" the coupling element and the counter-coupling element are separated from each other. Consequently, the coupling member is opened and it can be moved unhindered or almost unhindered over the motion transmitting member connected to the coupling member door leaf. If, on the other hand, the switching device is in its "off" position, then the coupling element and the counter-coupling element interlock and provide for the blockage of the coupling element and consequently those of the door leaf interacting therewith.

It has proven useful if the coupling element and the counter-coupling element are each formed as a coupling cups. These coupling heads can be arranged concentrically to the drive shaft. In addition, the coupling heads in question are usually arranged so that their openings face each other. In this context, it is further provided that the coupling element and the counter-coupling element releasably engage with corresponding conical surfaces. As a result, the coupling element and the counter-coupling element can be wedged against each other perfectly and with smooth transition on the one hand and on the other hand solve each other. The former process corresponds to the position of the switching device "off", while the latter method belongs to the "on" position of the switching device.

The switching device in turn is generally constructed in several parts. Basically, the switching device consists of on the one hand an actuator and on the other hand a holding element together. The design is generally made such that the adjusting element is arranged for the axial displacement of at least the coupling element. As a rule, both the coupling element and the mating coupling element which is in engagement therewith are displaced axially with the aid of the adjusting element. This happens starting from the closed state of the coupling member as soon as the door is moved and finally at the end of this process, the required breakout force is achieved in the application of the door leaf and the coupling member assumes its open state. First, however, the axial displacement of the coupling element and of the counter-coupling element which accompanies the start of the movement with the aid of the adjusting element ensures that the coupling element or both elements (coupling element and counter-coupling element) undergo the already described axial adjustment.

At the end of this axial adjustment, the holding element ensures that usually the counter-coupling element is held in the new axial position. Now the switching device is in its "on" position.

Further movement of the door leaf and consequently of the rotationally fixed connected to the drive shaft control element now causes the actuator, the coupling element is not (more) acted upon. For this purpose, the adjusting element is usually designed as a cam element with free surfaces arranged between individual cams. As a result, a movement of the door ensures that the rotatably coupled to the drive shaft cam member is acted upon by rotation. The associated cam of the cam member provides in this context for the described axial adjustment, and in general the common axial adjustment of the coupling element and the counter-coupling element.

In a further rotational movement of the cam element (beyond the cam addition), the coupling element strikes an open space and can move back spring-assisted axially. However, since the counter-coupling element is blocked by the holding element, this process also ensures that the coupling element is separated from the counter-coupling element. As already explained, this functional position corresponds to the position "on" of the switching device and to the "open" position of the coupling member.

In summary, the control element in the course of the process "clutch release" thus adjusted the coupling element and the counter-coupling element initially and jointly axially in a latching direction, namely until the holding element blocks the counter-coupling element releasing the coupling element in the counter-locking direction.

The locking direction in this context belongs to the axial movement of the coupling element or counter-coupling element such that at the end of the axial movement of the coupling element and the counter-coupling element in the latching direction, the retaining element can block the counter-coupling element. At the same time, the coupling element is released, which is spring-assisted in the opposite direction, the counter-locking direction, axially adjusted. That is, in this functional state, the counter-coupling element is blocked in the counter-locking direction releasing the coupling element.

In general, the holding element is constructed at least in two parts. Usually, the retaining element has a locking body and a switching element. The switching element is coupled via a frictional connection with the drive shaft. In fact, at this point usually a rotatably connected to the drive shaft friction damper is provided which engages the realization of the described friction connection to the switching element. This happens against the force of a spring. As long as the door leaf and consequently the drive shaft and with it the friction damper are moved, the friction damper ensures that the switching element cooperating herewith pushes the already mentioned latching body into a latching body receptacle of the counter-coupling element or holds the switching device in its "on" position.

However, should the speed of movement of the door leaf and consequently the drive shaft not (more) sufficient, the switching element can no longer hold the locking body against the force of the spring in the Rastkörperausnehmung the counter-coupling element. As a result, the switching device goes into its "off" position. At the same time the locking body leaves the Rastkörperausnehmung and the counter-coupling element is moved toward the spring in the counter-locking direction on the coupling element. At the end of this process are the counter-coupling element and the coupling element - again - engaged and the drive shaft and thus the door are blocked.

In order to realize this described process in detail, the switching element is a total of two parts. In fact, the switching element is composed of a rotary switching element and a translational switching element. The rotary switching element in turn interacts with the friction damper and follows the friction damper during its rotational movement. At the same time, the rotary switching element converts its rotational movement into a lifting movement of the translatory switching element. The lifting movement of the translatory switching element ensures that the latching body - controlled by a contour of the flank on the translatory switching element - is moved predominantly radially depending on the position of the flank or flank contour and can be moved.

As long as the translational switching element with the aid of the rotary switching element performs the already mentioned lifting movement, the locking body is moved radially in the direction of the Rastkörperausnehmung the counter-coupling element. Falls the lifting movement away, because the drive shaft is stationary or almost stationary and consequently the rotary switching element performs no more rotational movements and accordingly the translational switching element is not raised, the detent body is no longer held in the detent body, but moves out of this out. At the same time, the counter-coupling element is moved toward the coupling element in the counter-locking direction in a spring-assisted manner and, after engagement with the coupling element, ensures the blockage of the coupling element and consequently of the door leaf.

In the following the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment; show it:

1 an installation situation of the door unit according to the invention,

2 a section through the coupling member variable clamping force to illustrate the locking function

3 a force / displacement characteristic of the coupling member schematically and

4 a detailed perspective view of the cam member.

In the figures, a door unit is shown, which is a motor vehicle door unit. This has in its basic structure a door leaf 1 or swing door leaf 1 that is about a pivot point 2 in the in 1 indicated direction (see the double arrow with associated pivot angle a) can be pivoted. To the door wing or swing door leaf 1 is a motion transmission member 3 . 4 connected, which is supported on a body.

The motion transmission member 3 . 4 is based in its basic structure of a rack 3 with gear arrangement and a drive shaft 4 together. Because the rack 3 to the swing door wing 1 is connected or with the stationary on or in the swing door 1 attached drive shaft 4 combs, correspond in the 1 shown pivoting movements of the door leaf 1 to that the rack 3 is linearly reciprocated. These movements are via the gear arrangement on the drive shaft 4 transmitted, which rotates logically.

The drive shaft 4 penetrates a coupling member 5 , which is the drive shaft 4 enclosing and total in relation to the drive shaft 4 is formed rotationally symmetrical (see. 2 ). The entire arrangement, so the drive shaft 4 including coupling member 5 likes on a body-side inner face of the door leaf 1 to be appropriate. The coupling member 5 is equipped with a variable closing force to provide a locking function of the door leaf 1 to be able to represent. In fact, the door leaf can 1 in any desired opening angle or swivel angle α by means of the coupling member 5 be blocked. For this purpose, the coupling member interacts 5 variable closing force with the drive shaft 4 ,

In detail is the coupling member 5 designed to be mechanically switchable and assumes the basic states "open" and "closed". The design is made in the context of the invention so that the coupling member 5 from its closed to the open state by acting on the door leaf 1 is transferred with a corresponding breakout force. So that's when the door is stationary 1 in the closed state located coupling member 5 to open, the door must be open 1 be manually acted upon by the operator and / or motor by means of a motor, not shown, with the breakaway force in question. This breakaway force corresponds to the maximum holding force, which the coupling member 5 can muster. This is based on the schematic force / displacement curve after 3 clear.

In fact, the stationary or blocked door leaf belongs 1 to position zero (or three). In this position, the coupling member sets 5 a movement of the door leaf 1 a force F ₁ opposite. To now the door 1 to be able to move and the coupling member 5 to convert into its open state, the door must be 1 with a relation to the force F ₁ increased force F ₂ , the breakout force F ₂ , are applied. This is generally done manually by an operator. This includes position one.

As a result of this and when the door leaf is acted upon 1 with the mentioned breakaway force F ₂ , the coupling member 5 transferred from its closed to the open state. Further movements of the door leaf 1 are then virtually virtually free of resistance possible, which by the subsequent position 2 it becomes clear which to an operating force F ₃ when moving the door leaf 1 corresponds. Based on 3 one recognizes that this operating force F ₃ clearly below the holding force F ₁ or the coupling member 5 in the determined state of the door leaf 1 built counterforce is settled.

Once the door 1 is no longer moving, goes the coupling member 5 again in its closed state. That comes in the position 3 to expression. This is accompanied by the rise of the coupling member 5 built-up force F again, namely to the same or nearly the same value, which corresponds to the holding force F ₁ .

To this force / path course, so the dependence of the coupling member 5 a movement of the door leaf 1 opposite force F as a function of the path s of the door leaf 1 To realize in detail when passing over opening angle α, is a switching device 6 to 10 intended. The switching device 6 to 10 takes the positions "on" and "off". The design is such that the position "one" of the switching device 6 to 10 this corresponds to the fact that the coupling member 5 kept open. In the "off" position of the switching device 6 to 10 is the coupling member 5 in contrast, in the closed state and consequently the door leaf 1 blocked. In detail, the switching device provides 6 to 10 that in their position "on" the coupling member 5 kept open. The switching device 6 to 10 goes into her position "off" under blockage of the coupling member 5 over, once the movement of the door leaf 1 has fallen below a predetermined value. In general, this is the case when the door leaf 1 stands still or has almost come to a standstill.

In addition to the switching device 6 to 10 has the coupling member 5 in its basic structure, at least one coupling element 11 and a counter-coupling element 12 on. The mutual engagement of the coupling element 11 with the counter-coupling element 12 is from the switching device 6 to 10 controlled.

Based on 2 one recognizes that the coupling element 11 and the counter-coupling element 12 are each formed as a coupling pots. Also feature the coupling element 11 and the counter-coupling element 12 via a concentric arrangement in comparison to the drive shaft located in the center 4 , Furthermore, the coupling element 11 and the counter-coupling element 12 with corresponding conical surfaces 13 . 14 equipped and grip with these conical surfaces 13 . 14 detachable.

The switching device 6 to 10 is on the one hand with an actuator 6 and on the other hand with a holding element 7 . 8th . 9 . 10 equipped. At the actuator 6 it is a rotation with the drive shaft 4 coupled cam element 6 , An example of such a cam element 6 show the 4 ,

On the basis of this illustration, it is clear that the actuating element or cam element 6 on the one hand with cams 6a and on the other hand with open spaces 6b equipped. The cams 6a and the open spaces 6b alternate circumferentially of the disc-like cam element 6 from. Actually, the cams are 6a and open spaces 6b on a wreath 6c arranged, which in a lower side recording 11a of the coupling element 11 intervenes. In this way, the actuator or cam element 6 the coupling element 11 apply, as will be explained in more detail below.

In fact, the coupling element likes 11 in the region of its lower-side recess 11a be equipped with peripheral webs, which of their arrangement and number forth the cam 6a or open spaces 6b correspond. A rotation of the cam element 6 As a result, if - the webs on the cam 6a are arranged - the coupling element 11 a movement in the locking direction R axially along the drive shaft 4 experiences. In contrast, the bars are in the open spaces 6b , so is the coupling element 11 in the opposite direction, the counter-locking direction GR, moves or experiences no axial lifting movement.

In detail, the actuator or cam element provides 6 in the course of the process "release clutch" - starting from the in 2 shown position "closed" of the coupling member 5 - that the coupling element 11 and the counter-coupling element 12 be adjusted axially together in the latching direction R. That is, both the coupling element 11 as well as the counter-coupling element 12 be common compared to the in 2 shown position "raised". This lifting process is continued until the lower-side webs on the coupling element 11 the highest of the associated cams 6a of the cam element 6 achieved. In this position is the switching device 6 to 10 in their position "on".

This functional state corresponds to a latching body 10 of the holding element 7 . 8th . 9 . 10 in a Rastkörperausnehmung 15 the counter-coupling element 12 engages and can intervene. The ratchet body 10 will be in a camp 16 taken and can compared to an associated and him bearing recess 17 only movements in the radial direction compared to the drive shaft 4 perform. Once the catch body 10 in the Rastkörperausnehmung 15 the counter-coupling element 12 immersed, is the counter-coupling element 12 held in the position of the switching device "on". That is, the holding element 7 . 8th . 9 . 10 provides a blockage of the counter-coupling element 12 in the course of the process "release clutch".

Another rotary motion of the drive shaft 4 now leads to the lower webs of the coupling element 11 the respective cams 6a leave and into the open spaces 6b plunge. As a result, the coupling element moves 11 in the counter-locking direction GR, because the coupling element 11 from an associated spring 18 is charged. The feather 18 supported on the one hand to the counter-coupling element 12 on the other hand acts on the coupling element 11 in the counter-locking direction GR, so that the movement of the coupling element 11 explained in the said counter-GR direction.

Because in this process, the counter-coupling element 12 unchanged with the help of the retaining element 7 . 8th . 9 . 10 is blocked, the coupling element comes 11 from the counter-coupling element 12 free. The previously engaged conical surfaces 13 . 14 dissolve from each other. Now the coupling member 5 in the "open" position. As a consequence, the previously blocked door leaf becomes 1 released and can be pivoted with the low operating force F ₃ by a desired pivot angle α or taking into account an associated travel s (see position two in 3 ).

The holding element 7 . 8th . 9 . 10 is in detail from at least the locking body 10 and a switching element 8th . 9 together. It also belongs to the holding element 7 . 8th . 9 . 10 a connecting sleeve 7 which the drive shaft 4 ultimately with the switching element 8th . 9 coupled, via a friction joint 19 , The switching element 8th . 9 is in turn on the friction joint 19 with the drive shaft 4 coupled. The friction joint 19 is found between a friction body 20 and the switching element 8th . 9 , The friction body 20 in turn is non-rotatable with the connecting sleeve 7 coupled. The connection sleeve 7 and the drive shaft 4 are also rotatably coupled with each other.

The switching element 8th . 9 is designed in two parts. In fact, the switching element settles 8th . 9 from a rotary switching element 8th and a translational switching element 9 together. The friction body 20 is non-rotatable with the drive shaft 4 (over the connection sleeve 7 ) coupled. Consequently, rotational movements of the drive shaft 4 over the friction body 20 and the friction joint 19 on the rotary switching element 8th transfer. The friction body 20 Brings sufficient torque to over the frictional connection 19 the rotary switching element 8th to take with him in his rotational movement. The rotary switching element 8th in turn sets the rotational movement in a lifting movement of the translatory switching element 9 around. This can be done via a screw not shown in detail between the rotary switching element 8th and the translational switching element 9 respectively.

The translatory switching element 9 is with a flank 21 or a flank contour 21 equipped, which the detent body 10 radially in the direction of the drive shaft 4 or the Rastkörperausnehmung 15 in the counter-coupling element 12 applied. That depends on how strong the translational switching element 9 with the help of the rotary switching element 8th axially adjusted or "raised". As long as the drive shaft 4 undergoes a rotation, this rotation corresponds to that over the friction body 20 and the intermediate friction connection 19 also the rotary switching element 8th is taken. The rotations of the rotary switching element 8th lead to an axial movement of the translatory switching element 9 , which with its flank or flank contour 21 the catch body 10 in the catch body receptacle 15 the counter-coupling element 12 suppressed. During this entire time is the switching device 6 to 10 in position "on" and is the coupling member 5 "open".

However, as soon as the movement of the drive shaft 4 falls below a certain value or the drive shaft 4 standing still or standing still, this reduces the friction body 20 over the friction joint 19 on the rotary switching element 8th transmitting torque to a minimum. This torque is no longer sufficient to the translational switching element 9 to raise or to adjust axially. As a result, the translational switching element becomes 9 with the help of a spring 22 in the illustration 2 moved upwards. In fact, the spring provides 22 for that the translational switching element 9 in contact with the rotary switching element 8th is held. Once the rotary switching element 8th no more rotational movements executes, is the translational switching element 9 not raised anymore. The flank or flank contour 21 then leaves a movement of the detent body 10 radially outward because of the counter-coupling element 12 with the help of another spring 23 in counter-locking direction GR is acted upon. The feather 23 So ensures that the catch body 10 from the Rastkörperausnehmung 15 is pushed out and moves radially outward, especially the flank or flank contour 21 does not hinder this movement. At the same time, the counter-coupling element 12 on the coupling element 11 by the force of the spring 23 moved.

Now the switching device is located 6 to 10 in its position "off" and is the coupling member 5 "closed". Because the coupling element 11 and the counter-coupling element 12 are engaged again. The door leaf 1 is held or found and the coupling member 5 exercises the already discussed holding force F ₁ according to the 3 out.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102005060709 A1 [0002]
• DE 102008053087 A1 [0003]

Claims (15)

Door unit, in particular motor vehicle door unit, with a door leaf ( 1 ) connected motion transmission member ( 3 . 4 ) with drive shaft ( 4 ), and with a coupling member ( 5 ) variable closing force to represent a locking function, wherein the coupling member ( 5 ) for this purpose with the drive shaft ( 4 ) interacts, characterized in that the coupling member ( 5 ) is mechanically switchable, wherein the coupling member ( 5 ) from its closed to its open state by acting on the door leaf ( 1 ) is transferred with a corresponding breakaway force (F ₂ ) and the open state in accordance with the movement of the door leaf ( 1 ). Door unit according to claim 1, characterized in that a switching device ( 6 to 10 ) is provided, which in its position "on" the coupling member ( 5 ) in the open state and in the "off" position with blockage of the coupling member ( 5 ) passes as soon as the movement of the door leaf ( 1 ) falls below a predetermined value. Door unit according to claim 1 or 2, characterized in that the door leaf ( 1 ) is manually applied by an operator and / or motor. Door unit according to one of claims 1 to 3, characterized in that the coupling member ( 5 ) with at least one coupling element ( 11 ) and a counter-coupling element ( 12 ), the mutual engagement of the switching device ( 6 to 10 ) is controlled. Door unit according to claim 4, characterized in that the coupling element ( 11 ) and the mating coupling element ( 12 ) as each concentric with the drive shaft ( 4 ) arranged coupling cups are formed. Door unit according to claim 4 or 5, characterized in that the coupling element ( 11 ) and the mating coupling element ( 12 ) with corresponding conical surfaces ( 13 . 14 ) detachably interlock. Door unit according to one of claims 2 to 6, characterized in that the switching device ( 6 to 10 ) with a control element ( 6 ) and on the other hand a holding element ( 7 to 10 ) is equipped. Door unit according to claim 7, characterized in that the actuating element ( 6 ) for the axial displacement of at least the coupling element ( 11 ) is set up. Door unit according to claim 7 or 8, characterized in that the actuating element ( 6 ) as non-rotatably with the drive shaft ( 4 ) coupled cam element ( 6 ) is trained. Door unit according to one of claims 7 to 9, characterized in that the actuating element ( 6 ) in the course of the process "clutch release" the coupling element ( 11 ) and the mating coupling element ( 12 ) adjusted together in the latching direction (R) until the holding element ( 7 to 10 ) the mating coupling element ( 12 ) with release of the coupling element ( 11 ) in the counter-locking direction (GR). Door unit according to one of claims 1 to 10, characterized in that the holding element ( 7 to 10 ) at least two parts with locking body ( 10 ) and switching element ( 8th . 9 ) is trained. Door unit according to claim 11, characterized in that the switching element ( 8th . 9 ) via a friction connection ( 19 ) with the drive shaft ( 4 ) is coupled. Door unit according to claim 11 or 12, characterized in that the switching element ( 8th . 9 ) in two parts with rotary switching element ( 8th ) and translatory switching element ( 9 ) is trained. Door unit according to one of claims 11 to 13, characterized in that the latching body ( 10 ) in a camp ( 16 ) is arranged displaceably. Door unit according to one of claims 11 to 14, characterized in that the latching body ( 10 ) with a Rastkörperausnehmung ( 15 ) of the counter-coupling element ( 12 ) interacts.

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