Door handle device, locking element for a motor vehicle

Abstract

Door handle device (6) for a displaceable locking element (1), in particular a door (2) or hatch of a motor vehicle, with a bearing bracket (7) that can be arranged on an inner side (5) of the locking element (1), with a door handle (9) displaceably arranged on the bearing bracket (7), and with a device (17) for displacing the door handle (9) from a rest position (I) on the bearing bracket (7) into a use position (II) spaced apart from the bearing bracket (7) and in particular from the locking element, characterized in that the door handle (9) has two support arms (12) that are displaceably mounted on or in the bearing bracket (7) and arranged parallel to one another, each with a toothed rack (16) extending along the respective support arm (12), that the device (17) has at least one controllable actuator (18) with a gear that engages with the respective toothed rack (16) and can be driven by the actuator (18). (22) for each of the racks (16),and that the gears (22) are arranged on a common drive shaft (21) in a rotationally fixed manner.,

Description

The invention relates to a door handle device for a displaceable closing element, in particular a door or flap of a motor vehicle, having a bearing bracket which can be arranged on an inner side of the closing element, having a door handle which is arranged displaceably on the bearing bracket, and having a device for displacing the door handle from a rest position on or in the vicinity of the bearing bracket into a use position which is spaced apart from the bearing bracket, in particular spaced further away.Furthermore, the invention relates to a closing element, in particular a door or flap, of a motor vehicle, which has the above-mentioned door handle device.Door handle devices of the type mentioned at the beginning are known from the prior art. For example, the laid-open specification DE 196 49 209 A1 discloses an outside door handle device for a door on a motor vehicle, which has a door handle which, in a rest position, terminates substantially flush with a door outer skin and, for this purpose, lies in a trough-shaped depression of the door device, in which depression a user can engage in order to pull the door handle from the lowered rest position into a use position, in which a lock, which is coupled to the door handle, is unlocked. The door handle is pivotably mounted by a multi-link joint on the bearing bracket fastened to the door.Furthermore, door handle devices are known in which the door handle completely fills the depression, so that a user cannot grip the door handle in the rest position. Rather, the door handle is extended, for example automatically when a user approaches the motor vehicle, by means of a device from the rest position into a use position in which the user can grip the door handle and thereby unlock the door or a lock of the door.The laid-open specification DE 10 2013 212 198 A1 discloses a vehicle door which contains an activatable handle system having a driven actuator which is functionally connected to a handle and which generates a driven movement of the handle in a first and / or second direction and the selective opening or closing of a handle element in order to form a finger access space.The object of the invention is to provide an improved door handle device which in particular ensures a space-saving and robust displacement of the door handle.The object on which the invention is based is achieved by a door handle device having the features of claim 1. This has the advantage that, on the one hand, the displacement due to the omission of a multi-link lever joint is configured in a more cost-effective, space-saving and robust manner, and that, moreover, a simple and low-wear actuation of the door handle by the device is made possible. According to the invention, this is achieved in that the door handle has at least one support arm which is mounted displaceably on or in the bearing bracket and has a toothed rack extending along the support arm, and in that the device has at least one controllable actuator having a gearwheel which is in engagement with the toothed rack and can be driven by the actuator. The fact that the toothed rack is arranged or formed on the support arm results in the advantage of a direct force transmission from the gearwheel to the support arm, as a result of which very precise control or displacement of the door handle on the bearing bracket is ensured. In addition, the gear wheel, the support arm and the toothed rack can be designed to save installation space and require only a few individual parts, as a result of which both the production costs and the assembly effort are reduced.According to the invention, the door handle has at least two support arms which are arranged parallel to one another, wherein at least one of the support arms has the toothed rack. The presence of two support arms increases the robustness of the door handle device, in particular the mechanical robustness and mounting of the door handle on the bearing bracket is thereby improved. Both support arms are expediently mounted displaceably on the bearing bracket. The fact that the support arms are arranged parallel to one another and are expediently at least substantially identical results in the door handle being clearly guided by the support arms on the bearing bracket. According to an embodiment not belonging to the invention, only one of the support arms has the toothed rack, so that the actuator displaces the door handle by only one gearwheel.According to the invention, both support arms each have a toothed rack, wherein the actuator has a respective gearwheel in engagement with the respective toothed rack for each of the toothed racks, and wherein the gearwheels are arranged on a common drive shaft in a rotationally fixed manner. A driving force is thus transmitted to both support arms, so that an advantageous movement of the door handle is achieved, in which, for example, tilting or bracing of the door handle on the bearing bracket is advantageously prevented. Because gearwheels are arranged on a common drive shaft in a rotationally fixed manner, a clear and secure movement of the door handle results. If only one of the support arms has a toothed rack, the driving force for displacing the door handle is transmitted by a toothed rack, but the door handle is preferably guided and mounted by two or both support arms.Furthermore, it is preferably provided that the support arms and the respective toothed rack are curved in their longitudinal extension, so that the door handle can be displaced according to the curvature. The curved design of the support arms ensures that the support arms project less far into the door or the closing element, so that the door handle device is overall of narrow construction and can also be inserted into narrow closing element. In addition, the advantage results that the door handle is moved outwards into the use position along a curved path, whereby a simplified grasp behind the door handle is made possible for a user. Preferably, the curvature of the respective support arm and the respective toothed rack is selected such that the curvature follows a circular path which is in particular concentric to the pivot axis or axis of rotation of the door handle, so that it is advantageously ensured that the gearwheel is always in engagement with the toothed rack. According to an alternative embodiment, the respective support arm is formed to extend straight or straight.Furthermore, it is preferably provided that the actuator has an electric motor, the output shaft of which is coupled to the drive shaft by a transmission. The door handle is thus moved by electric motor. This ensures precise actuation of the door handle, which in particular allows displacement of the door handle into the use position when, for example, the approach of an authorized user is detected by means of a proximity sensor of the door handle device. In addition, the electric motor also ensures a targeted return movement of the door handle into the rest position. Particularly preferably, the transmission is designed such that the mechanical operative connection between the electric motor or output shaft and the drive shaft is releasable. By releasing the connection, a manual displacement of the door handle into the use position is possible, so that the door handle can be actuated at any time, in particular in the event of a power failure, accident or the like, for example.Particularly preferably, the gear is designed as a worm wheel gear, wherein a worm shaft is arranged on the output shaft and a worm wheel interacting with the worm shaft is arranged on the drive shaft. The advantage of this configuration is in particular that the output shaft can be aligned and is preferably aligned perpendicular to the drive shaft, as a result of which further construction space advantages are exploited. In addition, the worm wheel gear offers the advantage of a self-locking gear. It is thus not possible to move the door handle as long as the electric motor is mechanically coupled to the door handle by the gear mechanism. This prevents the transmission of worm shaft and worm wheel. This prevents, for example, unauthorized displacement of the door handle. In addition, the worm gear offers the advantage of a high transmission ratio, so that an electric motor with low torque can be used to securely displace the door handle.Furthermore, it is preferably provided that the worm wheel is mounted on the drive shaft in a rotationally fixed and axially displaceable manner. The rotationally fixed arrangement ensures that the drive torque which is transmitted from the worm shaft to the worm wheel is reliably transmitted to the gearwheels arranged on the drive shaft and thus to the door handle. The axial displaceability of the worm wheel provides the advantage that the worm wheel is displaceable relative to the worm shaft, as a result of which the worm wheel can be brought in particular into engagement and disengagement from the worm shaft. By means of the axial displacement, it is thus possible to cancel the operative connection between the worm wheel and worm shaft, whereby the actuator is decoupled from the door handle and the door handle is manually displaceable or displaceable.Furthermore, it is preferably provided that a displaceable slide is assigned to the worm wheel, which slide can be displaced by at least one device to such an extent that the worm wheel disengages from the worm shaft. By means of the slider, the worm wheel is thus selectively axially displaceable in order to bring it into engagement with or out of engagement with the worm shaft. The slide offers the advantage that a simple displacement of the worm wheel is made possible. For this purpose, the slider is coupled in particular positively with the worm wheel in the sliding direction. For this purpose, the worm wheel is arranged, for example, on a hollow shaft which is mounted on the drive shaft so as to be axially displaceable. In this case, the worm wheel is connected to the hollow shaft in a rotationally fixed manner and the hollow shaft is connected to the drive shaft in a rotationally fixed manner. In this case, it is provided in particular that the hollow shaft is arranged on the drive shaft in a positive-locking manner in the rotational direction, and the worm wheel is arranged on the hollow shaft in a positive-locking manner in the rotational direction. For this purpose, for example, the hollow shaft and the drive shaft and the worm wheel are formed polygonally on the mutually facing lateral surfaces.The hollow shaft preferably has one or two depressions, in which the slide engages with a slide projection in each case, and / or the hollow shaft has one or more projections, which interact with a depression of the slide. This ensures an advantageous positive connection in the axial direction. In this case, a projection with a depression is formed in such a way that it allows rotation of the hollow shaft or drive shaft relative to the slide. Optionally, a pivot bearing, in particular a rolling body bearing, magnetic bearing or the like, is interposed between the hollow shaft and the slide at the respective entrainment point in order to ensure operation with as little wear as possible. According to a preferred embodiment, a friction bearing is present. Due to the low rotational speed and the number of operations of the door handle that can be expected, the friction bearing, in particular in the case of an advantageous, low-wear material combination, is sufficient to ensure a long service life of the door handle device.According to a preferred development of the invention, the device which is designed for displacing the slide has at least one lever mechanism which is arranged on the bearing bracket and has an actuating lever and a coupling member, wherein the coupling member is connected in each case in an articulated manner to the actuating lever and to the slide. By the in particular manual actuation of the lever, the actuating force is transmitted to the slide by the coupling member and the slide is thereby displaced in the aforementioned manner. In particular, the device is designed to displace the slide upon actuation of the lever in such a way that the transmission disengages and thus the mechanical coupling between actuator and door handle is interrupted or eliminated. This advantageously allows simple switching from automated operation to manual operation.Particularly preferably, the actuating lever has an actuating section which is assigned to an opening through the bearing bracket or a pushbutton element held on the bearing bracket. The opening of the bearing bracket is in particular assigned to an opening of the closing element, so that the user can apply a compressive force to the actuating lever through the opening using, for example, an emergency wrench or a matching tool. Alternatively, a pushbutton element is held on the bearing bracket, which pushbutton element is already assigned to the actuating element and can be operated from the outside by a user. This makes it possible to eliminate the need for an emergency key.Particularly preferably, the apparatus further comprises at least one electrically actuatable holder device which is couplable or coupled to the slide. The slide can be held by the holder device in a desired position, in particular in the position in which the gear is engaged. In particular, the holder device ensures that unauthorized actuation of the actuating lever is prevented. The holder device is electrically controllable and in particular is designed such that it locks the slide in the electrically controlled state or in the energized state in the operating position in which the worm wheel and worm shaft are in engagement with one another.Preferably, the holder device releases the slide in its non-energized state. If the current thus fails, for example due to an accident or the like, the holder of the slide is released and the slide can be displaced by, for example, actuating the actuating lever in order to cancel the operative connection from the electric motor to the door handle. This ensures that in the event of an emergency, the manual actuation of the door handle is automatically released. The holder device is preferably designed as an electrical push-push device, which allows the slide to be securely locked again on the holder after detachment has taken place by being pushed into the holder. Alternatively, the holding device is designed in such a way that it locks the slide in an unenergized state and releases it in an energized state. Thus, only by actuating the holding device with a release current, or when the holding device is de-energized, is released and the slide is moved into the disengaged emergency position. As a result, the spring element automatically urges the door handle into the use position.According to a preferred development of the invention, at least one spring element urging into the use position in the door handle is assigned to the drive shaft. In particular, the spring element is designed as a helical spring which is rolled onto the drive shaft and acts in the direction of the use position. If the slide or the worm wheel is displaced from the operating position into the emergency operating position, in which worm wheel and worm shaft are disengaged, the spring element urges the door handle into the use position. This ensures that, when the slide is displaced, the door handle is displaced or projects automatically into the use position.Furthermore, it is preferably provided that at least one second spring element urging the slide away from the holder is assigned to the slide and / or the worm wheel. This leads to the advantage that when the holder device is de-energized and releases the slide, the slide is moved automatically into the emergency operating position by the second spring element. As a result, in particular the door handle is moved into the use position by the first spring element. This results in an advantageous emergency operation in which the door handle is moved automatically into the use position.The closing element according to the invention having the features of claim 13 is distinguished by the configuration according to the invention of the door handle device. In the rest position, the door handle terminates in particular flush with an outer skin of the closing element, so that it does not protrude from the closing element. In the use position, the door handle advantageously protrudes from the outer skin of the closing element, so that it can be gripped from behind and actuated by a user. In this case, the door handle has, for example, a sensor which detects an actuation of the door handle, or the door handle can be pulled further out of the use position into a release position, as a result of which a lock of the closing element can be actuated or released, for example with the aid of a component pull or another mechanical connection.The invention will be explained in more detail below with reference to the drawings. This is shown by FIG. 1 shows a closing element with an advantageous door handle device in a perspective illustration, FIG. 2 shows the closing element with the door handle device in a further perspective illustration, and FIG. 3 shows a further perspective illustration of the closing element with the door handle device.FIG. 1 shows a perspective illustration of a closing element 1 of a motor vehicle, in the present case in the form of a door 2. the door 2 has an outer skin 3 which is formed by a trim part 4. The trim part 4 has an inner side 5 facing away from the outer skin 3. A door handle device 6 is fastened to the inner side 5. For this purpose, the door handle device 6 has a bearing bracket 7 which abuts the inner side of the door 2. The door 2 has a through-opening 8, to which the bearing bracket 7 is assigned in such a way that it extends completely beyond the through-opening 8. The door handle device 6 has a door handle 9, which is shown in FIG. 1 in a rest position I with solid lines. The door handle 9 has an outer contour which corresponds to the inner contour of the through-opening 8, so that the door handle 9 completely or almost completely executes the through-opening 8. In the rest position shown in FIG. 1, an outer side of the door handle 9 terminates flush with the outer skin 3 of the door 2. The door handle 9 is thus arranged recessed in the door 2 in the rest position I.From the rest position I, the door handle 9 can be displaced into a use position II, as shown by a door handle 9 pivoted with dashed lines. From the use position II, the door handle 9 can optionally be moved further into a release position III which protrudes even further from the door 2 than the use position II. For this purpose, the door handle 9 is also again drawn in dashed lines in the release position 9.From the use position II, the door handle 9 can be moved, for example, manually by a user into the release position III, as a result of which a lock of the door 2 coupled to the door handle device 6 is actuated and as a result a locking of the door 2, for example on a body frame of the motor vehicle, is released or released.FIG. 2 shows a further perspective illustration of the door handle device 6 with the door handle 9 in the use position II. Behind the door handle 9 is shown the bearing bracket 7, which carries on the one hand the door handle 9 and on the other hand optionally a locking cylinder 10. The door handle 9 has a removable cover element 11 or flap element, after the removal of which a key can be introduced through an opening of the door handle 9 into a lock cylinder 10 in order to manually actuate the door handle device 6 and in particular a lock coupled thereto.FIG. 3 shows the door handle device 6 in a perspective illustration from behind or with a view of the inner side 5 of the cladding element 4. the door handle 9 has two support arms 12 which are arranged parallel to one another and are straight or, as shown in the present case, are curved and are mounted displaceably by the bearing bracket 7. For this purpose, the support arms 12 each have a plurality of spaced apart guide bolts 13 which are mounted in a guide rail 14 in a longitudinally displaceable manner. The respective guide rail 14 is also curved, wherein the curvature of the guide rail corresponds to the curvature of the support arms 12 and in particular follows a circular path concentrically arranged with respect to the axis of rotation of the door handle, and is held firmly on the bearing bracket 7. The support arms 12 can thus be displaced in a positively guided manner along the guide rail 14 by means of the bolts 13, with the result that the door handle 9 can be displaced from the rest position into the use position in accordance with the curvature, as shown by arrows 15 in the figures.Both support arms 12 each have a toothed rail 16 which is formed integrally with the respective support arm and extends in the longitudinal extent of the respective support arm 12.On the bearing bracket 7 there is furthermore arranged a device 17 for displacing the door handle 9. The device 17 has an actuator 18 which is designed to operate by electric motor. For this purpose, the actuator 18 has an electric motor 19. The electric motor 19 is coupled to the support arms 12 of the door handle 9 by a gear mechanism 20. For this purpose, a drive shaft 21 is rotatably mounted on the bearing bracket 7. Two gearwheels 22 are arranged on the drive shaft 21 at a distance from one another, wherein one of the gearwheels 22 is in engagement with one of the racks 16.Furthermore, a hollow shaft 23 is arranged on the drive shaft 21. The hollow shaft 23 is mounted axially displaceably on the drive shaft 21 and arranged on the latter in a rotationally fixed manner. For this purpose, the drive shaft 21 has a polygonal cross-sectional profile in sections, which forms a polygonal cross-sectional profile of an inner jacket wall of the hollow shaft 23 together with a positive connection in the direction of rotation.On the hollow shaft 23 there is also arranged a worm wheel 24 of the gear 20 designed as a worm wheel gear 25. In the operating position of the worm wheel 24 shown in FIG. 3, the worm wheel 24 interacts with a worm shaft 26 which is arranged on an output shaft 27 of the electric motor 19 in a rotationally fixed manner. The drive shaft 21 is oriented perpendicular to the output shaft 27.The hollow shaft 23 is also assigned a slide 28. The slide 28 is connected in an axial direction in a form-fitting manner to the hollow shaft 23. For this purpose, the hollow shaft 23 has two circumferential grooves 29, in each of which a driving projection 30 of the slide 28 engages, without preventing rotation of the hollow shaft 23.Furthermore, a device 31 is assigned to the slide 28, by means of which device the slide 28 can be axially displaced, wherein, in the event of an axial displacement of the slide 28, the latter carries along the hollow shaft 23 and thus the worm wheel 24. According to the present exemplary embodiment, the device 31 has a lever mechanism 32 which comprises an actuating lever 33 and a coupling rod 34 which is articulatedly connected to the actuating lever 33 and the slide 28. A free end 35 of the actuating lever 33 is located in the region of an opening 36 formed in the bearing bracket 7. the actuating lever 33 is held pivotably on the bearing bracket 7, so that when a compressive force is exerted on the free end 25, the actuating lever 33 is pivoted and, as a result, the slide 28 is displaced by means of the coupling rod 34 in such a way that the worm wheel 24 comes out of engagement with the worm shaft 26, as a result of which the mechanical operative connection between the electric motor 19 and the gearwheels 22 is canceled.After, for example, the cover element 11 has been removed from the door handle 9, a user can operate the actuating lever 33 with a suitable tool, in particular with an emergency key that is suitable or produced for this purpose, by pushing the emergency key through the opening 36 and pressing it against the free end 35 of the actuating lever 33. According to an alternative exemplary embodiment, instead of the opening 36 or in the opening 36, a pushbutton is already held, which a user can actuate from the outside, and which interacts directly with the actuating lever 33, so that an emergency key or an additional tool can be dispensed with.Furthermore, the device 31 advantageously has an electrically operated holder device 37, which is assigned to the slide 28. The holder device 37 is in particular designed as a push-push device and has a receptacle 38 in which an axially protruding projection 39 of the slide 28 engages in the operating position of the slide 28. The holder device 37 holds the projection 39 and the slide 28 in the fastening position or locks it as long as the holder device 37 is supplied with electric current. If the electrical connection is interrupted, the holder device 37 is thus switched off from current, it releases the locking, so that the slide 28 can consequently be axially displaced and in particular displaced into the emergency position, in which the worm shaft 26 and worm wheel 24 are no longer in engagement with one another.According to a further exemplary embodiment, the holding device 37 is designed in such a way that it locks the slide 28 in the fastened position in a current-free manner and has to be supplied with a release current for releasing the slide 28. This makes it possible, in particular, to achieve a specific release of the mechanical connection of worm shaft 26 and worm wheel 24, if necessary. This in particular prevents the door handle from unintentionally moving into the use position II due to a power failure. It can be ensured in this way that the door handle 9 only reaches the use position II when, for example, an accident procedure has been completely concluded and the motor vehicle has come to a standstill, so that the door handle 9 is only available to the emergency forces and does not yet protrude from the trim part 4 as long as the motor vehicle is still moving. In both of the aforementioned cases, the holding device 37 is an emergency actuator which ensures that the door handle 9 reaches the use position II at the right time in an emergency.Optionally, a spring element 40 is assigned to the slider 28 and / or the worm wheel 24, which spring element is arranged as a helical spring on hollow shaft 23 in the present exemplary embodiment, by means of which spring element the slider 28 or the worm wheel 24 is forced into the emergency position.Furthermore, one or more spring elements 41 are advantageously assigned to the drive shaft 21, which are designed in particular as helical springs, which load the shaft with a torque, by means of which the door handle 9 is forced into the use position. For this purpose, the respective spring element 41 is fastened at one end to the drive shaft 21 and at the other end to the housing or to the bearing bracket 7 in such a way that it is prestressed in order to move the door handle 9 into the use position. Preferably, the spiral spring according to the present exemplary embodiment of FIG. 3 is arranged at a free end of the drive shaft 21. According to a further exemplary embodiment, not shown here, the spring element 41 is arranged between the gearwheels 22 on the drive shaft 21, or a spring element 41 is arranged at each of the two free ends of the drive shaft 21 and is prestressed as described above. Alternatively to the configuration as a helical spring, the respective spring element 41 can be configured, for example, as a helical spring or elastomer element which acts on the drive shaft 21 directly or with the interposition of a transmission which converts, in particular, a linearly acting spring force into a torque acting on the drive shaft 21.If the power supply of the holder device 37 fails due to an accident or the like, this leads to the one self-locking worm gear 25 being disengaged by the displacement of the worm wheel 24 into the emergency position, and to the drive shaft 21 being driven to displace the door handle 9 into the use position II due to the omission of self-locking by the spring elements 41. This ensures that in the event of an accident the door handle 9 is automatically moved into the use position. Alternatively, a user can also manually release the self-locking of the transmission 20 by means of the actuating lever 33, as explained above.As shown in FIG. 1, the door handle 9 can be moved from the use position optionally into the release position III by the user, as a result of which a lock of the door 2 can be released, in particular by means of a Bowden cable system 42 only indicated in FIG. 3 and mechanically coupled to the door handle 9.The advantageous door device 2 ensures that, in particular in the event of an emergency, a user, in particular an assistant, can intuitively operate the door handle 9 and, immediately when the door handle 9 is first pulled, can release a lock of the door. In addition, the door device 2 is advantageously implemented in a space-saving manner and ensures a permanent and high level of operational reliability.List of reference characters1 Closing element 2 door 3 outer skin 4 trim part 5 inner side 6 door handle device 7 bearing bracket 8 through opening 9 door handle 10 lock cylinder 11 cover element 12 support arm 13 bolt 14 guide rail 15 arrow 16 tooth rail 17 device 18 actuator 19 electric motor 20 gear 21 drive shaft 22 gearwheel 23 hollow shaft 24 worm wheel 25 worm wheel gear 26 worm shaft 27 output shaft 28 slider 29 circumferential groove 30 driver protrusion 31 device 32 lever mechanism 33 actuating lever 34 coupling rod 35 end 36 opening 37 holder device 38 receptacle 39 protrusion 40 spring element 41 spring element 42 Bowden cable system

Claims

Door handle device (6) for a displaceable closing element (1), in particular door (2) or flap of a motor vehicle, having a bearing bracket (7) which can be arranged on an inner side (5) of the closing element (1), having a door handle (9) which is arranged displaceably on the bearing bracket (7), and having a device (17) for displacing the door handle (9) from a rest position (I) on the bearing bracket (7) into a use position (II) which is spaced apart from the bearing bracket (7) and in particular from the closing element, characterized in that the door handle (9) has two support arms (12) which are mounted displaceably on or in the bearing bracket (7) and are arranged parallel to one another and each have a toothed rack (16) which extends along the respective support arm (12), the device (17) has at least one controllable actuator (18) with a respective gearwheel (22) for each of the racks (16), which gearwheel is in engagement with the respective rack (16) and can be driven by the actuator (18), and the gearwheels (22) are arranged in a rotationally fixed manner on a common drive shaft (21).Door handle device according to claim 1, characterised in that the respective support arm (12) and the respective toothed rack (16) are curved in their longitudinal extension, so that the door handle (9) can be displaced according to the curvature.Door handle device according to one of the preceding claims, characterized in that the actuator (18) has an electric motor (19), the output shaft (27) of which is coupled to the drive shaft (21) by means of a transmission (20).Door handle device according to claim 3, characterised in that the gear (20) is designed as a worm wheel gear (25), wherein a worm shaft (26) is arranged on the output shaft (27) and a worm wheel (24) interacting with the worm shaft (26) is arranged on the drive shaft (21).Door handle device according to claim 4, characterised in that the worm wheel (24) is mounted on the drive shaft (21) in a rotationally fixed and axially displaceable manner.Door handle device according to one of claims 4 and 5, characterised in that the worm wheel (24) is assigned a displaceable slide (28), which is displaceable by at least one device (31) to such an extent that the worm wheel (24) disengages from the worm shaft (26).Door handle device according to claim 6, characterised in that the device (31) has at least one lever mechanism (32) arranged on the bearing bracket (7) and having an actuating lever (33) and a coupling member (34), wherein the coupling member (34) is connected in each case in an articulated manner to the actuating lever (33) and to the slide (28).Door handle device according to claim 7, characterised in that the actuating lever (33) has a free end (35) which is associated with an opening (36) through the bearing bracket (7) or a pushbutton element held on the bearing bracket (7).Door handle device according to one of claims 6 to 8, characterised in that the device (31) has at least one electrically actuatable holder device (37), which can be coupled or is coupled to the slider (28).Door handle device according to claim 9, characterised in that the holder device (37) locks the slide (28) in an energized state and releases it in an unenergised state, or locks it in an unenergised state and releases it in an energized state.Door handle device according to one of the preceding claims, characterized in that the drive shaft (21) is assigned at least one spring element (41) which urges the door handle (9) into the use position (II).Door handle device according to one of claims 6 to 11, characterised in that a spring element (40) urging at least the worm wheel (24) into an disengaged emergency position is associated with the slider (28) and / or the worm wheel (24).Closing element (1) for a motor vehicle, having a door handle device (6) according to one or more of Claims 1 to 12 arranged on the closing element (1).

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