CN110774868A

CN110774868A - Air outflow device

Info

Publication number: CN110774868A
Application number: CN201910679370.5A
Authority: CN
Inventors: S·谢克; J·施沃茨
Original assignee: Dr Schneider Kunststoffwerke GmbH
Current assignee: Dr Schneider Kunststoffwerke GmbH
Priority date: 2018-07-27
Filing date: 2019-07-26
Publication date: 2020-02-11
Anticipated expiration: 2039-07-26
Also published as: CN110774868B; DE102018118234B4; DE102018118234A1

Abstract

The invention relates to an air outlet device having two air guiding elements (30, 40) and a driver (10). The driver (10) has two receiving regions (12) which are arranged on opposite end sections of the driver (10). The receiving region (12) has an opening (14) which is designed such that a coupling pin (34, 52) of the air guiding element (30, 40) can be inserted into the opening and held in the opening (14), wherein the receiving region (14) has a first friction surface (16). At least one of the air guiding elements (30, 40) has a connecting section (50) with two opposite second friction surfaces (54, 56) which bear against opposite first friction surfaces (16) of the receiving region (12) of the driver (10).

Description

Air outflow device

Technical Field

The invention relates to an air outflow device for coupling and damping two air guiding elements to a driver.

Background

The driver can be used in particular for very flat air outflow devices which have two air guiding elements for deflecting the air parallel to the longitudinal direction of the air outflow device. The air outflow serves to divert the discharged air, which may be provided by an air conditioning unit or a ventilation device. Air bleeders are used in particular in vehicles to bring fresh air, tempered air and/or air-conditioned air into the passenger compartment of the vehicle. The vehicle may be, for example, a motor vehicle, such as a car, truck or bus, train, airplane or boat.

In addition to controlling the direction of rotation of the discharged air, the amount of discharged air can also be generally adjusted at the time of air discharge. This can be achieved by a control device which is provided, for example, with an operating device for pivoting the air-guiding element or is provided separately from such an operating device next to the outflow opening.

The air outflow may be provided in the vehicle dashboard or in the region of the A, B or C-pillar and on the roof of the vehicle. The flat air outflow is usually located in the dashboard and has a very large width. Such a slot ejector may extend, for example, over the width of the dashboard or partially over the dashboard.

Entrainment members are known for coupling the plates of the air outflow. The driver surrounds the coupling pin and serves to synchronously pivot the lamellae. Damping can also be provided by such a driver arrangement, wherein the lamella plate has coupling pins on the rear side, which alternately point in opposite directions. The driver connected to the coupling pin is clamped by alternating contact with the coupling pin and exerts a lateral pressure on the lamella. Thereby, the operating force for pivoting the group of blade plates can be adjusted.

A driver for an air outflow embodied in this way is known, for example, from DE 102014105359B 4 and DE 102016108356 Al.

Furthermore, DE 202017102028U 1 discloses an air outflow device having at least one friction element and at least one plate which is pivotably supported in a housing in an air channel by means of a bearing pin, wherein the at least one bearing pin has a friction body which extends at a distance from a side wall of the housing, by means of which the bearing pin is pivotably supported in the housing. The friction element is arranged in the housing of the air outflow device in such a way that the friction surface of the friction body rests against the surface of the friction element. The friction element is provided as a separate component, apart from the driver. Further, the friction member is accommodated in a separate space outside the air passage. The friction body of the sheet is also located in the separate space.

The known embodiments have a number of disadvantages. On the one hand, additional friction elements are required. Furthermore, the air outflow and the housing must be dimensioned to be larger, since additional space must be provided for the friction body of the support pin of the lamella plate and for the friction element.

Thus, not only the required installation space but also the assembly steps and the required components and therefore the costs are increased.

A further disadvantage of the devices known from the prior art is that they are not suitable for flat air discharge devices. All devices known from the prior art, in particular such devices having a driver which is to cause a clamping, require a plurality of plates, as a result of which an operating force can be generated. However, flat air bleeders usually have only two air guiding elements, which must be damped in order to set the actuating force.

However, in the prior art, such damping cannot be achieved by the mutual arrangement of a plurality of coupling pins. The known damping by mutual support has proven to be effective only from a greater number of lamellae. In the case of two flaps, the flaps are pressed apart from one another in the direction of the pivot axis of the flaps by means of a catch and against a housing wall of the air outflow.

Other known damping elements for sheet metal have silicone dampers. Silicone dampers are subject to wear in the event of frequent use and thus do not provide a constant operating force over the life of the air bleed. Further, a silicone cushion or a cushion having a gel-like property has a feeling of discomfort.

Disclosure of Invention

The object of the present invention is therefore to provide an air outflow having a catch, which eliminates the problems of the prior art and provides a simple, cost-effective solution.

In the case of only two air guiding elements, a damping for adjusting the actuating force is provided, wherein no additional installation space is required and further components can be omitted. Furthermore, the tactile properties when the air guiding element is pivoted should also be improved.

The above object is achieved by an air outflow, comprising at least:

two air guiding elements, wherein the air guiding elements are pivotably mounted in the housing about axes extending in parallel and have a connecting section with a coupling pin, an

A driver, wherein the driver has two receiving regions which are arranged on opposite end sections of the driver, wherein the receiving regions have openings into which coupling pins of the air guiding element are inserted and held,

wherein the content of the first and second substances,

-the accommodation area has a first friction surface,

the connecting section has two opposite second friction surfaces which bear against opposite first friction surfaces of the receiving region of the driver,

the receiving region of the driver is received between the second friction surfaces, and

the second friction surface extends from the coupling pin and is oriented orthogonally to the pivot axis of the coupling pin.

The air outflow device has two air guiding elements, for example in the form of plates, and a driver, for example made of metal. The driver has a first friction surface which bears against a second, opposite friction surface of at least one connecting section.

The actuating force can be adjusted directly between the driver and the air guide element, which is embodied as a plate, for example, by means of a first friction surface on the driver. For this purpose, at least one air guiding element or a plate with two corresponding second friction surfaces rests against the opposite first friction surface of the driver at the level of the receiving region. The receiving region of the driver therefore has a corresponding first friction surface on the opposite side. In contrast to the solutions hitherto solved in the prior art, friction and damping are not produced on one side of the driver, but on both sides of the driver. The driver is thus located in the installed state between two opposite second friction surfaces of the connecting section of the at least one air guiding element, so that the first friction surface is in contact with the second friction surface of the air guiding element on the opposite side of the driver. And therefore do not need to abut and clamp against each other.

The damping of the air guiding element by the driver makes it possible to design the air outflow without additional damping elements, for example made of silicone or rubber. Furthermore, no additional installation space for the damping element is required. The damping is also improved in comparison to the known embodiment in that the air guide element acts on the first friction surface of the driver via a connecting section having a second, opposite friction surface.

The damping of the two air guiding elements can thus advantageously be achieved with a driver of simple design. The driver can be made of plastic or metal, wherein metal is also understood to be a metal alloy according to the technical teaching described herein.

The metal configuration of the driver provides a durable component. The driver can thus be protected against external environmental influences and always provides a constant damping due to the bearing between the second friction surfaces of the air guiding element. The damping can thus be maintained constant, in particular over a long time interval, since the driver is accommodated between the opposite second friction surfaces of the air guiding element.

A second friction surface extends from the coupling pin, wherein the second friction surface is oriented orthogonally to the pivot axis of the coupling pin. The second friction surface is located directly in the receiving region of the driver having the first friction surface and extends parallel to the first friction surface.

The first friction surface can partially surround the opening in a circular ring shape. The annular friction surface must, of course, have a receptacle for the insertion of the coupling pin of the air guide element into the opening. These receptacles are selected to be so large that the coupling pins can be introduced into the openings.

The first friction surface can be formed by a plurality of segments having a greater extent with respect to the width of the driver. The catch itself is a flat component. Thus, the width or height of the driver may be a few millimeters. However, the driver has a large area in the plane in which the opening and the friction surface extend. The driver is in particular designed such that the first friction surface surrounding the opening has a large surface area. Thereby, the adjustment of the operating force is improved due to the increase of the first friction surface.

The first friction surface can extend concentrically with the opening and the radius of the first friction surface can be greater than twice the radius of the opening.

In a further embodiment, the catch has at least one limiting element for limiting the pivot angle of the air guiding element. When the air-guiding element pivots, it therefore alternately comes into contact with the limiting element and restricts further pivoting. This serves to prevent damage or destruction of the air outflow and its components. In addition, disturbing noises, such as rattles or rattles, can thereby be prevented.

The opening has a receptacle, through which a coupling pin can be introduced. The receptacle may be oriented substantially orthogonal to the longitudinal direction of the driver. Preferably, in the installed state, the receptacles are oriented such that they face away from the air outflow opening and the front side of the sheet.

In other embodiments, the limiting element can be located on the side of the catch facing away from the open receptacle and have a rim rising from the receptacle region. The edge can serve as an abutment area for defining the maximum pivot angle of the air-guiding element.

The driver can be produced in large quantities and at low cost as an injection-molded part or as a stamped part. By means of the metallic embodiment, the driver is hardly subjected to external influences. In the accommodated state, the driver is furthermore located between the two second friction surfaces of the at least one air guiding element, wherein the air guiding element is usually made of plastic. The plastic-metal material pairing enables durable operation without wear phenomena. The wear phenomenon is therefore particularly scarcely observed, since no sharp edges of the driver act on the plastic part of the air guide element. The metal strap rests essentially flat against the plastic surface of the air-guiding element. A coupling and an operating force generation which remain unchanged can be achieved even in a driver made of plastic.

In other embodiments, the second friction surfaces can be arranged offset to one another. Thereby a better buffering can be achieved. In addition, the embodiment described allows an easy clamping of the driver, since the two contact surfaces in the connecting section are provided by second friction surfaces extending offset from one another. It is therefore also possible to take into account possible expansions of the driver made of metal (under intense heat action) without a change in the operating force for pivoting the air-guiding element occurring. Furthermore, tolerances in the production of the catch and/or the air guide element can thereby also be compensated.

One of the air guiding elements may have an impact wall for a limiting element of the driver in the connecting section. The collision wall is an abutment surface for a limiting element for limiting the maximum pivot angle. Instead of the impact wall, the further air-guiding element may have an impact surface in the region of the air-guiding surface of the air-guiding element. Since one of the air guiding elements is the upper air guiding element and the other air guiding element is the lower air guiding element, the collision wall inside the connecting section is only necessary for the upper air guiding element. The second impact surface may be formed by an air-guiding surface in the lower air-guiding member.

The air guiding element can preferably be made of plastic and can therefore be produced in an injection molding process in high quantities at low cost and quickly.

In a further embodiment, the air guide element can have a coating and/or an additive in the connecting section or at least in the region of the second friction surface, which enhances the friction surface and/or influences the properties of the friction surface. The additive may consist, for example, of a glass fibre element or a similar reinforcing element.

Drawings

Further advantages, features and solution possibilities emerge from the following description of the figures of the exemplary embodiments which should not be construed as limiting.

In the drawings:

fig. 1 shows a schematic view of two air guiding elements and a driver;

fig. 2 shows another schematic illustration of two air guiding elements and a driver;

FIG. 3 shows a schematic view of an air guiding element;

FIG. 4 shows an enlarged view of the connecting section of the air guiding element of FIG. 3 in a direction of the line of sight from above;

FIG. 5 shows an enlarged view of the connecting section of the air guiding element of FIG. 3 in a direction of the line of sight from below;

fig. 6 shows an enlarged illustration of the connecting section on the rear side of the air guiding element;

FIG. 7 shows a schematic cross-sectional view of the connecting section along the line B-B of FIG. 6;

FIG. 8 shows a schematic cross-sectional view of the connecting section along line A-A of FIG. 4;

FIG. 9 shows a schematic view of a driver;

fig. 10 shows a schematic cross-sectional view of the connection region of the air-guiding element with the driver accommodated therein;

FIG. 11 shows an enlarged view of the connection section of the back side of the air guiding element of FIG. 3 with the received driver;

fig. 12 shows an enlarged view of the connecting section with the accommodated catch from above;

fig. 13 shows an enlarged view of the connecting section with the accommodated catch from below; and

fig. 14 shows a perspective view of the connecting section with the received driver.

Detailed Description

Elements provided with the same reference numerals in the various figures correspond substantially if not otherwise indicated. Moreover, the illustration and description of components not essential to an understanding of the technical teachings disclosed herein have been omitted. In addition, reference numerals have not been repeated for all elements that have been introduced and shown, as long as these elements themselves and their functions are described or known to those skilled in the art.

Fig. 1 shows a schematic illustration of two

air guiding elements

30, 40 of a driver 10. The

air guide elements

30 and 40 and the driver 10 are part of an air outflow device, which is not shown in the figures. The air outflow device has a housing in which the

air guiding elements

30 and 40 are pivotably supported by means of a bearing pin 42 and a bearing 46. The air outflow device can also have further flaps which are pivotably supported in the housing about axes which extend orthogonally to the pivot axes of the

air guiding elements

30 and 40. The sheet may be located upstream of the

air guide members

30 and 40 in the air flow direction. In addition, the air outflow can have a throttle device, by means of which the quantity of air delivered can be varied.

The air outflow device is preferably designed as a flat outflow device and therefore also has only two

air guiding elements

30 and 40. The air outflow device is suitable for installation in a motor vehicle (e.g. a passenger car) and is located in the area of a center console. In other embodiments, the air outflow device can be disposed in other locations. Furthermore, instead of one orientation, the air outflow device can also be arranged in a different orientation, wherein the air outflow device has a width that is greater than the height.

The air outflow is coupled to a ventilation device (e.g., an air conditioning system) via a supply channel, so that conditioned air can be discharged via the air outflow. To change the direction of the discharged air, the

air guide members

30 and 40 and the flap may be pivoted. The pivoting can be performed manually by means of an adjusting device or by means of a drive, wherein remote control operation is possible.

The housing of the air outflow, the

air guiding elements

30, 40 and the plates and the throttle device can be made of plastic and can therefore be produced inexpensively and quickly in an injection molding process with a high number of parts. The driver 10 is made of metal or metal alloy and can be produced by stamping, likewise with a high number of parts and at low cost.

Fig. 1 shows the

air guiding elements

30 and 40 from the front in the viewing direction towards the air outflow opening of the air outflow.

Fig. 2 shows a further illustration of the

air guiding elements

30 and 40 and the driver 10 in a viewing direction toward the rear side 49 of the

air guiding elements

30 and 40. The

air guiding elements

30 and 40 are connected to the driver 10 on their rear side 49 via a connecting section 50.

Fig. 3 shows a schematic illustration of an air guiding element 40. The second air guiding element 30 is constructed analogously to the air guiding element 40. Therefore, a detailed description of the air guide member 30 is omitted below. The configuration of the connecting section 50 for the air guiding element 40 therefore also substantially corresponds to the configuration of the connecting section of the air guiding element 30.

The air guide element 40 is designed as a plate and has a bearing pin 42 and a bearing 46. The bearing 46 and the bearing pin 42 define a pivot axis about which the air guide element 40 is pivotably supported on the front side 48. The air guide member 40 has an air guide surface 44 on the opposite side. The air guide surface 44 serves to divert the air flowing out according to the position of the air guide member 40. In the lateral region, a connecting section 50 is provided, which is open from the rear side 49. A coupling pin 52 is provided in the connecting section 50. The connecting section 50 has two second friction surfaces 54 and 56, which are opposite and oriented toward one another. The driver 10 is accommodated in the connecting section 50.

In the exemplary embodiment shown here, the air guiding element 30 has a correspondingly configured connecting section with two second friction surfaces. In other embodiments, which are not shown, only one of the

air guiding elements

30 and 40 can have a connecting section with two second friction surfaces which are formed opposite one another. The other connecting section can have only one contact surface, in which the driver 10 contacts one side in the accommodated state of the driver 10. In these embodiments, the driver 10 is secured in three positions. This support is sufficient to provide coupling and cushioning without the air-guiding

members

30, 40 being pressed apart from each other or against the side walls of the housing of the air outflow.

In the embodiment shown here, however, the driver 10 is supported between the second friction surfaces 54 and 56 of the connecting sections 50 of the

air guiding elements

30 and 40 at four points.

Fig. 4 shows an enlarged illustration of the connecting section 50 of the air guiding element 40 in the direction of the line of sight from above. Fig. 5 shows an enlarged illustration of the connecting section 50 of the air guiding element 40 in the direction of the line of sight from below. In the illustration of fig. 5, an impact wall 58 is also shown, which serves to define the maximum pivoting angle of the

air guiding elements

30 and 40. For this purpose, the edge 22 of the catch 10 delimiting the element 20 can rest against the impact wall 58 (see fig. 9).

The coupling pin 52 extends transversely to the opening of the connecting section 50. Second friction surfaces 54 and 56 are located on either side of the coupling pin 52. The second friction surfaces 54 and 56 are arranged offset to each other.

Fig. 6 shows an enlarged illustration of the connecting section 50 in the viewing direction toward the rear side 49 of the air guiding element 40. The illustration shows a staggered arrangement of the friction surfaces 54 and 56. The second friction surfaces 54 and 56 are arranged substantially above one another, as can be seen from fig. 4 and 5.

Fig. 7 shows a schematic cross-sectional view of the connecting section 50 along the line B-B of fig. 6. The sectional illustration shows the arrangement of the impact wall 58, which is located in the front section of the air guiding element 40.

The coupling pin 52 is located at the level of the lower section of the rounded region of the hatched surface. The second friction faces 54 and 56 are not shown in the cross-section of figure 7.

Fig. 8 shows a schematic cross-sectional view of the connecting section 50 along the line a-a of fig. 4. The second friction surfaces 54 and 56 are spaced apart from one another such that the driver 10 can be received between them and abut the second friction surfaces 54 and 56. In other embodiments, which are not shown, the two second friction surfaces 54 and 56 can also be oriented relative to each other in such a way that the driver 10 is clamped in the receiving region 12.

Fig. 9 shows a schematic view of the driver 10. The driver 10 has a receiving region 12 at its end section. The receiving region 12 has openings 14 which are accessible through the receiving portion 18. The width of the receptacle 18 corresponds substantially to the diameter of the opening 14. The opening 14 is oriented such that the receptacle 18 is oriented substantially orthogonally to the longitudinal direction of the driver 10. On the front side of the driver 10 opposite the receptacle 18, the driver 10 has a limiting element 20. The limiting element 20 is formed by two raised edges 22, which are connected to one another by an arc-shaped section 24. The rim 22 acts as a stop to define the maximum pivot angle of the

air guiding elements

30 and 40.

The thickness of the driver 10 corresponds substantially to the distance between the second friction surfaces 54, 56.

The driver 10 is substantially annular in shape in the receiving region 12, wherein an annular surface serves as a first friction surface 16. The first friction surface 16 is formed on both sides of the driver 10 in the respective receiving region 12.

In the enlarged illustration of the upper receiving region 12, the radius R of the opening 14 and the radius R of the friction surface 16 are shown. Here, the radius R is greater than twice the radius R. The lower receiving region 12 is correspondingly designed, wherein the radius R of the first friction surface 16 is greater than twice the radius R of the opening 14. The friction surface 16 therefore has a relatively large extent. Correspondingly, a large contact surface is provided between the second friction surfaces 54 and 56 of the

air guiding elements

30 and 40 and the first friction surface 16 of the driver 10. The operating force required for pivoting the

air guiding elements

30 and 40 can thus be simply adjusted.

In addition to providing a damping action for adjusting the operating force, the driver 10 also serves to couple the

air guiding elements

30, 40 when pivoting.

Furthermore, tolerance compensation is provided by the offset arrangement of the second friction surfaces 54 and 56. A large tolerance can thus be predefined for the driver 10 and the

air guiding elements

30 and 40 and in particular for the connecting section 50 thereof. This affects the production process and components, in particular, at low cost.

Fig. 10 shows a schematic sectional view of the connection region 50 of the air-guiding

elements

30 and 40 with the driver 10 accommodated therein. The coupling pins 52 and 34 of the

air guiding elements

30 and 40 are received in the opening 14 of the driver 10. Thus, the driver 10 surrounds the engagement coupling pins 34 and 52. The insertion of the driver 10 is effected by introducing the receiving region 12 into the connecting section 50. The driver 10 and the

air guiding elements

30 and 40 can then be pivoted until they occupy the position shown in fig. 10. In this position, the

air guiding elements

30 and 40 are oriented relative to one another and coupled by the driver 10. In addition, the

air guiding elements

30 and 40 receive the receiving region 12 of the driver 10 between their second friction surfaces 54 and 56 via their connecting sections 50. As a result, a sliding out of the driver 10 is not possible due to the bearing between the second friction surfaces 54, 56.

The spacing of the friction surfaces 54, 56 and the width of the driver 10 therefore define how much operating force is required when the

air guide elements

30 and 40 pivot. In embodiments with only one connecting section 50 with two opposite friction surfaces 54, 56, the required actuating force is mainly determined by the friction between the

second friction surface

54, 56 of the

air guiding element

30 or 40 and the driver 10.

Furthermore, it can be seen in the sectional view in fig. 10 how the edge 22 can define the pivot angle by contact with the impact wall 58 or the impact surface 32 of the lower air-guiding element 30 when the air-guiding

elements

30 and 40 are pivoted.

Fig. 11 shows an enlarged illustration of the connecting section 50 in the viewing direction toward the rear side 49 of the air guiding element 40. The driver 10 is held clamped between the second friction surfaces 54 and 56, which are opposite and offset from each other. Additionally, the receiving area 12 surrounds the coupling pin 52.

Fig. 12 shows a further enlarged view of the connecting section 50 with the accommodated driver 10 from above.

Fig. 13 shows an enlarged view of the connecting section 50 with the driver 10 accommodated therein from below.

In the exemplary embodiment shown, the orientation of the driver 10 is selected such that the receptacle 18 faces the rear side 49. In other embodiments, which are not shown, the receptacles 18 may also be oriented in such a way that they are oriented toward the front side 48. For this purpose, the second friction surfaces 54, 56 must therefore be arranged at corresponding positions in the connecting section 50.

The second friction surfaces 54, 56 project from opposite sections of the connecting section 50 into a continuous gap for receiving the driver 10.

The second friction surfaces 54, 56 may have special coatings or their properties may be modified by additives. In this case, for example, glass fiber elements can be introduced into the plastic. Furthermore, the second friction surfaces 54, 56 project into the gap via rounded edges. Wear due to the metal driver 10 is thereby further reduced. Wear and the resulting change in the actuating force required for pivoting the

air guide elements

30, 40 is substantially prevented by the material weakening in that the driver 10 lies flat against one another via its first friction surface 16 and the

air guide elements

30, 40 lie flat against one another via their second friction surfaces 54, 56. In this case, a relatively large contact surface is formed, so that no cutting or chipping occurs. In the prior art, wear frequently occurs due to friction between the pin and the surrounding part of the coupling rod, so that the synchronization during pivoting of the plates is reduced and proper operation is no longer possible. However, the teachings described herein prevent or reduce such wear.

Finally, fig. 14 shows a perspective view of the connecting section 50 with the accommodated driver 10.

List of reference numerals

10 driver

12 receiving area

14 opening

16 first friction surface

18 accommodating part

20 defining element

22 edge

24 section(s)

30 air guide element

32 collision surface

34 coupling pin

40 air guide element

42 support pin

44 air guide surface

46 support member

48 front side

49 back side

50 connecting section

52 coupling pin

54 second friction surface

56 second friction surface

58 impact wall

Radius R

radius r

Claims

1. An air outflow device having at least:

two air guiding elements (30, 40), wherein the air guiding elements (30, 40) are mounted in the housing so as to be pivotable about axes extending in parallel and have a connecting section (50) with a coupling pin (34; 52), and

a driver (10), wherein the driver (10) has two receiving regions (12) which are arranged on opposite end sections of the driver (10), wherein the receiving regions (12) have openings into which coupling pins (34; 52) of the air guide element (30; 40) are inserted and are held in the openings (14),

wherein the content of the first and second substances,

-the accommodation area (14) has a first friction surface (16),

the connecting section (50) has two opposite second friction surfaces (54, 56) which bear against opposite first friction surfaces (16) of the receiving region (12) of the driver (10),

the receiving region (12) of the driver (10) is received between the second friction surfaces (54; 56) and

the second friction surface (54, 56) extends from the coupling pin (34; 52) and is oriented orthogonally to the pivot axis of the coupling pin (34; 52).

2. An air outflow according to claim 1, wherein the second friction surfaces (54, 56) extend offset from one another.

3. The air outflow according to claim 1 or 2, wherein one of the air guiding elements (30; 40) has an impact wall (58) in the connecting section (50) for the delimiting element (20) of the driver (10).

4. An air outflow according to one of claims 1 to 3, wherein the first friction surface (16) partially surrounds the opening (14) in a circular ring shape.

5. The air outflow according to one of claims 1 to 4, wherein the first friction surface (16) is formed by segments having a greater extent with respect to the width of the driver (10).

6. The air outflow according to one of claims 1 to 5, wherein the first friction surface (16) extends concentrically to the opening (14) and a radius (R) of the first friction surface (16) is greater than twice a radius (R) of the opening (14).

7. The air outflow according to one of claims 1 to 6, having at least one defining element (20) for defining a pivot angle of the air guiding element (30; 40).

8. The air outflow according to one of claims 1 to 7, wherein the opening (14) has a receptacle (18) which is oriented substantially orthogonally to the longitudinal direction of the driver (10).

9. The air outflow according to claims 7 and 8, wherein the limiting element (20) is located on a side of the catch (10) facing away from the receptacle (18) of the opening (14) and has a rim (22) rising from the receiving region (12).