Adjustment equipment

Abstract

An adjustment device (1) for an exterior visual unit of a vehicle comprises: a base shaft (2); a housing (3) surrounding the base shaft, the housing rotating around the longitudinal axis (A) of the base shaft within an adjustment range, the housing being provided with a housing ring (4), and a drive ring (5) surrounding the base shaft. The drive ring is provided with a force-generating cam (6) which can be combined with the housing ring to move the housing downwardly from a high housing position to a low housing position along the base shaft, and to move the drive ring upwardly from a low drive ring position to a high drive ring position along the base shaft. The housing ring is composed of a lower part (4a) and an upper part (4b), the lower part being rotationally connected to the housing, and the upper part being supported on the first part via the lower part and being able to interact with the force-transmitting cam via the top part.

Description

Technical Field

[0001] The invention relates to an adjustment device for an exterior vision unit of a vehicle. Background Art

[0002] An adjustment device for an external vision unit, such as an external rearview mirror, an external display and / or an external camera, is used for a vehicle, such as a car. Such an adjustment device is generally known for the purpose of an external rearview mirror unit and generally comprises a housing which can be pivoted relative to a base to be coupled to the vehicle within an adjustment range, such as between two positions, typically between a driving position and a parking position. A further pivoting from the driving position to an overfolded position is also possible. In the parking position, the external vision unit extends substantially along the vehicle, with the mirror side of the external rearview mirror unit facing the vehicle. In the driving position, the external vision unit is generally directed substantially transversely to the vehicle, and in the case of an external rearview mirror unit, the mirror side faces backwards relative to the normal driving direction. In this context, other positions are also possible, such as a working position or a driving position, wherein the external vision unit comprises different angles relative to the vehicle, such as an angle of about 60 degrees or about 30 degrees. In the overfolded position, the vision unit extends substantially along the vehicle, with the mirror side of the external rearview mirror unit facing away from the vehicle. For other exterior vision units, whether or not used in conjunction with an exterior rearview mirror, the mentioned positions can be adopted by the exterior display and / or the camera lens. The exterior display and / or the camera lens can then be arranged on the exterior vision unit, for example, at approximately the same position as the exterior rearview mirror, but can also be arranged on the exterior vision unit at other positions.

[0003] Adjustment of the exterior vision unit can be done electrically, for example during normal use from a parking position to a driving position and vice versa. The adjustment device is then provided with an electric drive, by means of which the housing can be pivoted about the base. The electric drive usually has a self-locking structure.

[0004] The external vision unit can also be adjusted under the influence of external forces, for example in the event of an impact such as a collision, or during manual operation. Thus, the external vision unit can be moved from the driving position to the overfolded position or the parking position, for example by a collision with an object. In addition, the external vision unit can be moved manually from the parking position to the driving position, for example, and vice versa. The electric drive is then usually provided with a disconnection so that the connection can be released when the electric drive is operated under the influence of external forces exceeding a defined threshold. Thus, damage to the drive can be prevented, which is particularly important when the drive has a self-locking structure. After operation under the influence of external forces, the electric drive can be reconnected again via the connection in the reset movement of the electric drive, for example by performing a reset movement of the electric drive towards the parking position.

[0005] In order to counteract vibrations during use, it is important to clearly define the driving position. In practice, for this purpose, strong springs are usually used, which continuously press the housing against the base.

[0006] However, for electric adjustment, such strong pressing of the housing on the base is less than ideal, since it requires a relatively powerful drive motor to perform the adjustment movement. Moreover, due to such spring forces, when adjusting under the influence of external forces, the drive may be subjected to relatively large forces before decoupling occurs. Therefore, in practice, the components in the drive train of the drive must usually be stronger than the resistance required by the drive. However, from a cost point of view, it is desirable to make the drive structure lighter.

[0007] From WO2012047104, in particular the embodiment of Figure 10, it is known that when manually operated from the driving position, the uncoupling force is transmitted via a cooperating cam ring and during electric adjustment, the housing is freed from the influence of the spring force, whereby the electric drive is released. Such an adjustment device offers many advantages, among which the electric drive can be made of a light construction and works well in practice.

[0008] However, disadvantageously, the cam rings do not always interlock properly through the electric adjustment from the Park position back to the Drive position.

[0009] Therefore, in WO 2017074193, it has been proposed to arrange the force transmission cams in the driving position to be supported on the housing cam tracks, allowing them to cooperate directly with the housing in and near the driving position, so that the cam rings interlock better. The housing cam track is then provided with inclined sides near the position corresponding to the driving position. When the housing is pivoted from the parking position to the driving position, the force transmission cams press the housing cam ring and the base cam ring into each other by moving along these inclined sides of the housing cam track. This direct control of the interlocking of the cam rings is particularly advantageous because the housing is not under the action of a spring during electric operation.

[0010] The adjusting device for an exterior vision unit of a vehicle according to WO 2017074193 comprises:

[0011] a base, the base comprising a foot and a base shaft extending from the foot along a longitudinal axis,

[0012] a housing surrounding the base axle, the housing being arranged on a foot and being pivotable within an adjustment range about the longitudinal axis of the base axle via an intermediate driving position between a parking position and an over-folded position, the housing being provided with a housing ring, and

[0013] A drive ring surrounds the base shaft, the drive ring being provided with three force transmission cams spaced apart circumferentially at equal intervals, the force transmission cams cooperating with the housing ring of the housing.

[0014] The force transmission cam in the adjustment device according to WO 2017074193 cooperates with the housing ring to move the housing downward along the base axis from a high housing position to a low housing position when the drive ring rotates relative to the housing in a first direction around a base axis near the driving position of the housing, in which the housing is locked and cannot rotate.

[0015] The force transmission cam in the adjustment device according to WO 2017074193 also cooperates with the housing ring so that when the drive ring rotates, the drive ring moves upward along the base shaft from the low drive ring position to the high drive ring position during the reset movement of the electric drive, so that the drive ring can be returned to its initial position in the driving position again together with the housing relative to the base shaft through the electric drive after being pivoted by the action of an external force.

[0016] In particular, during this electric reset movement, the force transmission cams can be transferred from the housing ring near the driving position in an axially high drive ring position to the cam ring, so that they can then be in the same axially high drive ring position, and when the drive ring is electrically driven to adjust the drive ring relative to the housing near the driving position, the drive ring is arranged on the housing ring again to interlock the cam rings of the housing and the base in the driving position under the action of the spring.

[0017] Although the known device provides many advantages, it also has disadvantages. For the sake of support stability, the drive ring is provided with three cams spaced at equal intervals. These cams cooperate with three housing track cams spaced at equal intervals on the housing ring. Those housing track cams are located near the driving position and have a continuous (run-on) surface on one side and a second continuous surface on the other side in the circumferential direction, the continuous surface on one side can cooperate with the force transmission cam to move the drive ring axially upward to the high drive ring position during the reset movement, and the second continuous surface on the other side can cooperate with the force transmission cam to press the housing axially downward. Therefore, there are three track sections on the housing ring, each of which is located between two housing track cams and each has a first continuous surface at one end and a second continuous surface at the opposite end.

[0018] In particular, the first continuous surface occupies a considerable part of the available circumferential space, since the drive ring must be able to move upwards on the continuous surface against the action of the spring, wherein a relatively weak electric motor is preferred in terms of cost efficiency and no motor current limiter is required for cutting off the operation of the electric motor. Therefore, in normal electrically driven adjustment movements, the maximum angle to which the housing of the adjustment device can be adjusted relative to the base is relatively small. When the housing is electrically moved from the driving position to the parking position, the first continuous surface limits the return travel that the housing can make when moving to the parking position, since the force transmission cam contacts the second continuous surface.

[0019] Due to the presence of the cam and its continuous surface, of the theoretically available 120 degrees of adjustment, only a more limited adjustment angle of about 70 degrees remains. However, in many cases, an adjustment angle of more than 70 degrees is desired. For example, in many cases, it is desirable to arrange the housing from a working position essentially perpendicular to the vehicle to a parking position in which the housing is positioned almost parallel to the vehicle. In other embodiments, for example using two or only one force transmission cam, likewise, due to the presence of the cam and its continuous surface, the theoretically available adjustment angle of 180 or 360 degrees is not fully available. Summary of the invention

[0020] The present invention envisages an adjustment device with which the above-mentioned disadvantages can be offset while retaining the above-mentioned advantages. To this end, the present invention provides an adjustment device for an external rear view unit of a vehicle, comprising:

[0021] A base axis extending along the longitudinal axis,

[0022] a housing surrounding the base shaft, the housing being pivotable about the longitudinal axis of the base shaft within an adjustment range and being provided with a housing ring, and

[0023] a drive ring surrounding the base shaft, the drive ring being provided with a force transmission cam, the force transmission cam being cooperable with the housing ring to move the housing downwardly along the base shaft from a high housing position to a low housing position via the housing ring when the housing rotates relative to the drive ring in a first direction about the base shaft, and to move the drive ring upwardly along the base shaft from a low drive ring position to a high drive ring position when the drive ring rotates relative to the housing about the base shaft in an opposite direction,

[0024] The housing ring comprises a first bottom part and a second top part, wherein the first bottom part is rotationally coupled to the housing, and the second top part is supported on the first part via its lower side and can cooperate with the force transmission cam via its upper side,

[0025] wherein the top portion of the housing ring is rotatable relative to the bottom portion about a base axis,

[0026] wherein the bottom portion and the top portion are each provided with a first continuous surface, the first continuous surfaces cooperate in pairs to cause the drive ring to move axially upward to a high drive ring position via a force transmission cam, and

[0027] The top portion is provided with a second continuous surface, and the second continuous surface cooperates with the force transmission cam to press the housing axially downward.

[0028] Thus, by providing a housing ring with an articulated rotatable top portion, it is possible to clear space on the upper surface of the ring by utilizing an intermediate continuous surface, and the continuous surface remaining on the upper surface can still be removed by a rotational movement.

[0029] By providing the top part and the bottom part with stop surfaces respectively, which limit the rotation of the top part relative to the bottom part in a rotational direction by cooperating in pairs, it is possible to limit the free rotation of the top part of the shell ring in a rotational direction, and the second continuous surface becomes operable at a predetermined position, for example, near the working position.

[0030] In short, the first continuous surface engages near the working position when the drive ring moves in a first rotational direction relative to the housing, and the second continuous surface engages near the working position when the drive ring moves in an opposite second rotational direction relative to the housing.

[0031] When the drive ring rotates, when the top part of the housing ring is rotated relative to the bottom part of the housing ring by the force transmission cam of the drive ring, the point where the continuous surface cooperates can be shifted, thereby expanding the free space for adjustment and thus the adjustment angle.

[0032] Advantageously, by driving the top portion of the housing ring by the force transmission cam of the drive ring, the housing can pass an angle from the first position to the second position that is greater than: 360 degrees divided by the number of cams of the drive ring that can cooperate with the housing ring and minus the angle spanned by at least the upper side of the first continuous surface. Assuming that the three cams are spaced, for example, at equal intervals, the angle that can be passed is, for example, greater than 70 degrees, in particular greater than 75 degrees, preferably about 80 degrees, more preferably about 90 degrees or about 100 degrees.

[0033] When the first continuous surface at the upper side of the top part of the housing ring and the second continuous surface at the lower side of the top part of the housing ring overlap each other in the circumferential direction, a free space for adjustment can be achieved, thereby enlarging the adjustment angle. The first continuous surface and the second continuous surface can be located axially at different positions, but also radially at different distances from the longitudinal axis.

[0034] Advantageously, the housing and the foot arranged on the base shaft are respectively provided with a housing cam ring and a base cam ring, which interlock with each other within the adjustment range only in the driving position, i.e., so that the housing is in the low housing position, and move axially apart when the housing is pivoted relative to the base along the longitudinal axis from the driving position, and at least partially support each other when further pivoting, i.e., so that the housing is in the high housing position.

[0035] Furthermore, the adjustment device preferably comprises a spring which surrounds the base shaft and exerts a spring force on the drive ring along the longitudinal axis in the direction of the foot.

[0036] Furthermore, the adjustment device advantageously comprises an electric drive unit which is contained in the housing and is provided with an output element for electrically adjusting the device, the output element cooperating with the circumference of the drive ring.

[0037] Furthermore, the adjustment device advantageously comprises a base cam track arranged on the base shaft.

[0038] With regard to the disclosure of the present application, it should be noted that the technical features of the regulating device described in the independent claim may also be regarded as an invention alone or in combination with only one or more technical features in the independent claim, the dependent claim or the specification.

[0039] The invention also relates to an external rear-view unit for a motor vehicle, comprising an adjustment device, and a mirror, a display and / or a camera coupled to a housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The invention will be further explained below based on the exemplary embodiments of the adjustment device shown in the accompanying drawings. In the accompanying drawings:

[0041] Figure 1 A schematic perspective exploded view showing a top view of an adjusting device according to the invention;

[0042] Figure 2 Show Figure 1 A schematic perspective exploded view of the adjustment device from bottom view;

[0043] Figure 3 Show Figure 1 A schematic cross-sectional view of the adjusting device in the assembled state in the driving position;

[0044] 4a to 4g show Figure 3 The adjustment device is from Figure 3 Schematic side view during electric adjustment from driving position to parking position and back shown;

[0045] Figure 5 Show Figure 1A schematic cross-sectional view of the adjusting device in the assembled state in the parking position;

[0046] Figures 6a to 6g show Figure 5 The adjustment device is manually adjusted and then Figure 5 Schematic side view during electric return to parking position shown.

[0047] It should be noted that the drawings depict only exemplary embodiments and are not to be considered limiting in any way. DETAILED DESCRIPTION

[0048] Figure 1 and Figure 2 An adjustment device 1 for an exterior vision unit of a vehicle is shown. The adjustment device 1 comprises a base shaft 2 extending along a longitudinal axis A. The adjustment device 1 further comprises a housing 3 surrounding the base shaft 2. The housing 3 consists of a bottom member 3a and a top member 3b. The housing 3 can be pivoted about the longitudinal axis A of the base shaft 2 within an adjustment range, in particular from Figure 1 and Figure 2 The working position I shown is pivoted into the parking position II and back. The adjusting device 1 further comprises a housing ring 4 and a drive ring 5 which surrounds the base shaft 2 .

[0049] The housing ring 4 has an articulated structure and comprises a bottom portion 4a and a top portion 4b. The bottom portion 4a is rotationally coupled to the housing 3 and in this embodiment is integrally formed with the bottom member 3a of the housing. The top portion 4b can rotate relative to the bottom portion 4a and relative to the housing 3 around the longitudinal axis A.

[0050] The drive ring 5 is provided with three force transmission cams 6 spaced at equal mutual spacings, which can cooperate with the housing ring 4 when the drive ring 5 rotates relative to the housing 3. When the housing 3 rotates relative to the drive ring 5 about the base axis 2 in a first direction indicated by the black head of the arrow P, the force transmission cams 6 can cooperate with the second continuous surface 7 on the upper side 8 of the top part 4b of the housing ring 4 via the first side 6a to move the housing 3 from the high housing position H downwards along the base axis 2 to the low housing position L via the housing ring 4. Therefore, the top part 4b is provided with the second continuous surface 7, which cooperates with the force transmission cams 6 to press the housing 3 axially downwards along the longitudinal axis A, for example when approaching the driving position I from the parking position II in normal electric drive adjustment (for example, as represented step by step in Figures 4d-g).

[0051] When the drive ring 5 rotates in the opposite direction (i.e., in the direction of the white head of the arrow P) about the base axis 2 relative to the housing 3, the drive ring 5 can move upward from the low drive ring position l to the high drive ring position h along the base axis by cooperating with the housing ring 4. In this embodiment, it has been achieved that the second side 6b of the force transmission cam 6 engages with the capture surface 9 on the upper side 8 of the top part 4b of the housing ring, whereby the drive ring 5 drives the top part 4b of the housing ring 4 to rotate together (Figure 4c). The bottom part 4a and the top part 4b are both provided with three pairs of first continuous surfaces 10a, 10b spaced apart at a mutual spacing. The first continuous surfaces 10a, 10b cooperate in pairs to axially move the drive ring 5 from the low drive ring position l to the high drive ring position h along the longitudinal axis A via the force transmission cam 6 supported on the upper side 8 of the housing ring 4. Therefore, for example, during the reset movement of the electric drive, the drive ring 5 can move upward from the low drive ring position l to the high drive ring position h along the longitudinal axis A.

[0052] The bottom portion 4a and the top portion 4b of the housing ring 4 are each provided with three sets of stop surfaces 11a, 11b spaced at equal intervals, and in this embodiment, the three sets of stop surfaces 11a, 11b spaced at equal intervals are arranged to be substantially upright along the longitudinal axis A. The stop surfaces 11 restrict the rotation of the top portion 4b relative to the bottom portion 4a in a rotation direction (in this case, in the direction of the white head of the arrow P) by mating in pairs. In this embodiment, the stop surfaces 11 are operated near the working position I.

[0053] The second continuous surface 7 at the upper side 8 of the top portion 4b of the housing ring 4 and the first continuous surface 10b at the lower side 12 of the top portion 4b of the housing ring 4 are located at different positions along the longitudinal axis A of the base shaft 2. Thus, the housing 3 can pass through an angle of more than 70°, in particular about 80°, from the parking position II all the way to the driving position I.

[0054] The bottom member 3a of the housing 3 and the foot 13 provided on the base shaft 2 are provided with a housing cam ring 15 and a base cam ring 14, respectively, which are interlocked only in the driving position in the adjustment range, that is, the housing 3 is in the low housing position L. When the housing 3 is pivoted relative to the base shaft 2 from the driving position I in the direction of the parking position II (that is, in the direction of the white arrow P), the cam rings 14, 15 are moved apart axially along the longitudinal axis A. When pivoting further, the cam rings 14, 15 at least partially support each other, that is, the housing 3 is in the high housing position H.

[0055] In this example, the drive ring 5 and thus the force transmission cam 6 are under the action of a spring. For ease of reference, the spring is not shown, but is embodied as a helical spring which surrounds the base shaft 2 and exerts a spring force on the drive ring 5 along the longitudinal axis A.

[0056] The adjusting device 1 of this exemplary embodiment further comprises an electric drive unit (also not shown) which is contained in the housing 3 and is provided with an output element, for example a worm gear, for electrically adjusting the device 1, which cooperates, for example via a toothing, with the circumference 16 of the drive ring 5. For use as an exterior vision unit of a motor vehicle, the adjusting device 1 comprises a mirror, a display and / or a camera connected to the housing 3.

[0057] The adjusting device 1 is also implemented with a base cam track 17 arranged on the base shaft 2. The base cam track 17 is configured to serve as a support for the first side 6a of the force transmission cam 6 during normal electrically driven adjustment between the driving position I and the parking position II, so that the spring force is absorbed by the base shaft 2. The housing 3 is then free of the spring force, so that the cam rings 14, 15 on the foot 13 of the base shaft 2 and the lower side of the bottom member 3a of the housing 3 can be easily moved apart when supporting each other and the housing 3 can be easily rotated on the foot 13. When the angle corresponding to the driving position I is reached, the drive ring 5 performs a stroke, whereby the force transmission cam 6 passes from the base cam track 17 to the upper side 8 of the top part 4b of the housing ring 4. The spring force is thus transmitted via the housing 3, as a result of which the cam rings 14, 15 on the base shaft 2 and the housing 3, respectively, in the driving position I are spring-energized. When the working position / driving position I is reached during electric adjustment from the parking position II, the interlocking of the cam rings 14, 15 is controlled by the cooperation of the first side 6a of the force transmission cam 6 with the corresponding second continuous surface 7 on the upper side 8 of the top part 4b of the housing ring 4; the housing 3 then passes from the axially high housing position H to the axially low housing position L.

[0058] 4a to 4g show schematic side views of the adjustment device 1 during operation during electric adjustment from the driving position I to the parking position II and back. Figure 3 The regulating device 1 is also shown on a reduced scale in the operating position I, wherein the housing 3 is in the lowered housing position L. The force transmission cam 6 of the drive ring 5 is supported by its first side 6a on the second continuous surface 7 on the upper side 8 of the top part 4b of the housing ring 4. The housing cam ring 15 and the base cam ring 14 are interlocked and are under the action of a spring (not shown).

[0059] 4b shows that the drive ring 5 has an angular stroke relative to the housing 3 due to the output element of the electric drive engaging the circumference 16, whereby the first side 6a of the force transmission cam 6 passes over the base cam track 17. The spring force is now transmitted via the base shaft 2 and the housing 3 is free of the spring.

[0060] FIG. 4c shows that upon further electric adjustment, the housing 3 can now rotate relative to the drive ring 5. The housing cam ring 15 moves upward away from the base cam ring 14, and the housing 3 moves from the axially low housing position L to the axially high housing position H. At the same time, the housing 3 rotates from the driving position I around the base shaft 2 in the direction of the parking position II. The top part 4b of the housing ring 4 cooperates with the catch surface 9 on the upper side 8 of the top part 4b of the housing ring 4 via the second side 6b of the force transmission cam 6. The top part 4b of the housing ring 4 is now held by the drive ring 5 so that it remains upright relative to the base shaft 2. The bottom part 4a of the housing ring 4 rotates with the housing 3 and rotates around the base shaft 2.

[0061] FIG. 4 d shows that during further electric adjustment, the housing 3 remains in the axially high housing position H due to the support of the housing cam ring 15 on the base cam ring 14. The housing 3 and the bottom part 4 a of the housing ring 4 continue to rotate until the parking position II shown in FIG. 4 d is reached. In the parking position II, the housing 3 runs against a stop (not shown) and the electric drive stops. The second continuous surface 7 on the upper side 8 of the top part 4 b of the housing ring 4 and the first continuous surface 10 b on the lower side 12 of the top part 4 b of the housing ring 4 are not located on the channel of each other because they are located at different height positions along the longitudinal axis A of the base shaft 2. Therefore, the housing 3 can pass through an angle of more than 70° (about 80° in this exemplary embodiment) between the driving position I and the parking position II.

[0062] 4e shows that when the housing 3 is electrically adjusted back to the driving position I, the second continuous surface 7 at the upper side 8 of the top portion 4b of the housing ring 4 cooperates with the first side 6a of the force transmission cam 6 to force the cam rings 14, 15, which are not yet under the action of the spring, to engage. The housing 3 starts to move downward along the longitudinal axis A from the axially high housing position H to the axially low housing position L.

[0063] FIG. 4 f shows that the cam rings 14, 15 are engaged again and the housing 3 is in an axially low housing position L. The position corresponding to the driving position I has been reached and the housing 3 is now rotationally coupled to the base shaft 2. Therefore, the housing 3 still continues to stand upright relative to the base shaft 2 and the drive ring 5 rotates, performing an angular stroke relative to the housing 3 and the base shaft 2. As a result, the first side 6a of the force transmission cam 6 passes from the base cam track 17 to the second continuous surface 7 on the upper side 8 of the top part 4b of the housing ring 4. The stop surface 11a on the bottom part 4a of the housing 3 cooperates with the stop surface 11b of the top part 4b of the housing ring 4 and limits the rotation of the top part 4b of the housing ring 4 relative to the bottom part 4a of the housing ring 4. Further rotation of the drive ring 5 is impossible and the electric drive stops. The housing 3 is now again under the action of the spring and the regulating device is locked in the driving position I.

[0064] With the aid of the housing ring 4, in particular via the first continuous surfaces 10a, 10b, the drive ring 5 is then adjusted together with the housing 3 under the influence of external forces about the base shaft 2, and by means of an electric drive, the drive ring 5 can be brought into the appropriate position relative to the base shaft 2 again in a reset movement. Figure 5 This is illustrated in Figures 6a-g. Figure 5 The adjusting device 1 is shown in the parking position II, the housing 3 in the high housing position H. The force transmission cam 6 of the drive ring 5 is supported by its first side 6a on the base cam track 17 and transmits the spring force via the base shaft 2. The drive ring is in the axially high drive ring position h. The housing cam ring 15 is supported on the base cam ring 14, but the housing 3 is not acted upon by the springs. Figures 6a to 6g show the operation during manual adjustment from the parking position II in the direction of the driving position I and subsequent electric resetting in a schematic side view of the adjusting device 1.

[0065] Figure 6a is like Figure 5 The adjusting device 1 is also shown in reduced scale in the parking position II, wherein an external force is applied manually or otherwise. For ease of reference, a portion of the top portion 4b of the housing ring 4 above the first continuous surface 10b on the underside of the top portion 4b of the housing ring 4 is drawn transparent.

[0066] In FIG. 6 b , it can be seen that the drive ring 5 has risen against the action of a spring (not shown) and that the force transmission cam 6 has moved via its second side 6 b beyond the stop 18 on the base cam track 17 .

[0067] As can be seen in FIG. 6 c , the force transmission cam 6 of the drive ring 5 then drives the top portion 4 b of the housing ring 4 via its first side 6 a. The drive ring 5 is in an axially high drive ring position h. Thus, in the electric reset movement, via the top portion 4 b of the housing ring 4, the bottom portion 4 a of the housing ring 4 and thus the housing 3 are driven to an angular position corresponding to the driving position I. When the housing 3 is in the driving position I, the housing cam ring 15 and the base cam ring 14 are interlocked, and the housing 3 moves from the high housing position H to the low housing position L. The drive ring 5 supported via the housing ring 4 on the housing 3 thus drops from the axially high drive ring position h to the axially low drive ring position l. The housing 3 and the bottom portion 4 a of the housing ring 4 rotatably coupled thereto remain upright, but the top portion 4 b of the housing ring 4 is driven by the force transmission cam 6 and rotates together with the drive ring 5 driven by the electric drive. This is shown in FIG. 6 d . This continues until the first continuous surfaces 10a, 10b on the upper side of the bottom part 4a of the housing ring 4 and the lower side 12 of the top part 4b of the housing ring 4, respectively, are engaged. This is shown in FIG. 6f. The continuous surfaces 10a, 10b have a gentle slope and can be operated by an electric drive. Due to the relative rotation of the housing ring parts 4a, 4b, the top part 4b of the housing ring 4 moves upward along the longitudinal axis A against the action of the spring. Therefore, the drive ring 5 supported on the top part 4b of the housing ring 4 via the force transmission cam 6 moves axially upward along the longitudinal axis A from the low drive ring position I back to the high drive ring position h. In this high drive ring position h, the force transmission cam 6 is able to cross over the base cam track 17. Therefore, the first side 6a of the force transmission cam 6 crosses from the base cam track 17 to the second continuous surface 7 on the upper side 8 of the top part 4b of the housing ring 4. The drive gear rotates further until the first side 6a of the force transmission cam abuts the stopper 18. The spring now acts on the base shaft 2 via the force transmission cam 6 and the base cam track 17 and does not act on the housing 3 or the housing ring 4. An electrically driven rotation of the drive ring 5 and a rotational coupling with the top part 4b of the housing ring via the force transmission cam 6 are not possible, and the bottom part 4a of the housing ring 4 and the housing 3 now begin to rotate together in the direction of the parking position II. The housing 3 is moved axially upwards along the longitudinal axis A to the high housing position H by the cooperation of the housing cam ring 15 with the base cam ring 14, and the housing 3 is rotated back to the parking position II together with the bottom part 4a of the housing ring 4. The adjustment device 1 is then ready again for normal electrically driven adjustment from the parking position II to the driving position I, as explained above based on FIGS. 4a-g.

[0068] The present invention is not limited to the exemplary embodiments represented here. Many variations are possible. Therefore, the bottom portion of the housing ring can be implemented as a separate component supported on the housing and locked with its rotation. In addition, for example, different numbers of force transmission cams can be used, such as only one or two. In addition, the housing can be adjusted between other positions (for example, between two working positions, or between multiple working positions and a stop position) via an adjustment device in addition to a specific driving position and a parking position. These variations are clear to those skilled in the art and are understood to fall within the scope of the present invention as defined by the appended claims.

[0069] Reference numerals

[0070] 1 Adjustment equipment

[0071] 2 Base axis

[0072] 3. Housing

[0073] 3a Bottom member housing

[0074] 3b Top member shell

[0075] 4 Housing ring

[0076] 4a Bottom section housing ring

[0077] 4b Top section housing ring

[0078] 5 Drive ring

[0079] 6-force transmission cam

[0080] 6a First side force transmission cam

[0081] 6b Second side force transmission cam

[0082] 7 Second continuous surface on the upper side of the top portion housing ring

[0083] 8 Upper side of the top section housing ring

[0084] 9 Capture surface on the upper side of the top part housing ring

[0085] 10a First continuous surface on the upper side of the bottom part housing ring

[0086] 10b First continuous surface on the underside of the top portion housing ring

[0087] 11 Stop surface

[0088] 11a Stop surface on bottom section housing ring

[0089] 11b Stop surface on top section housing ring

[0090] 12 Lower top section housing ring

[0091] 13 feet

[0092] 14 Base cam ring

[0093] 15 Housing cam ring

[0094] 16 Circumference of drive ring

[0095] 17 Base cam track

[0096] 18 Stop on base cam track

[0097] A Longitudinal axis

[0098] P Arrow

[0099] h High drive ring position

[0100] l Low drive ring position

[0101] H High housing position

[0102] L Low housing position

[0103] I Driving position / working position

[0104] II Parking location

Claims

1. An adjustment device for an external visual unit of a vehicle, comprising: Base axis, a housing surrounding the base shaft, the housing being pivotable about the longitudinal axis of the base shaft within an adjustment range, wherein the housing is provided with a housing ring, and a drive ring surrounding the base shaft, the drive ring being provided with at least one force transmission cam, the at least one force transmission cam being capable of cooperating with the housing ring to move the housing downwardly along the base shaft from a high housing position to a low housing position via the housing ring when the housing pivots relative to the drive ring about the base shaft in a first pivot direction, and to move the drive ring upwardly along the base shaft from a low drive ring position to a high drive ring position when the drive ring pivots relative to the housing about the base shaft in an opposite pivot direction, The housing ring comprises a bottom part and a top part, wherein the bottom part is rotatably connected to the housing, and the top part is supported on the bottom part through the bottom side of the top part and can cooperate with the force transmission cam through the top side of the top part, wherein the top portion of the housing ring is pivotable relative to the bottom portion about a base axis, wherein the bottom portion and the top portion are each provided with a first continuous surface, the first continuous surfaces cooperating in pairs to cause the drive ring to move axially upwards to a high drive ring position via a force transmission cam, and The top part is provided with a second continuous surface, which cooperates with the force transmission cam to press the shell axially downward, and the top part and the bottom part are both provided with stop surfaces, which only limit the pivoting of the top part relative to the bottom part in one pivot direction by cooperating in pairs.

2. The adjustment device according to claim 1, wherein: When the drive ring is pivoted, the top portion of the housing ring is rotated relative to the bottom portion of the housing ring by at least one force transmission cam of the drive ring.

3. The adjustment device according to claim 2, wherein: The top portion of the outer shell ring is driven by at least one force transmission cam of the drive ring, and the outer shell passes through an angle from a first position to a second position, and the angle is greater than: 360 degrees divided by the number of force transmission cams of the drive ring that can cooperate with the outer shell ring and minus the angle spanned by at least the upper side of the first continuous surface.

4. The adjustment device according to claim 1 or 2, wherein: The first continuous surface and the second continuous surface are located axially at different positions and / or radially at different distances from the longitudinal axis.

5. The adjustment device according to claim 1 or 2, wherein: The housing and the foot arranged on the base shaft are respectively provided with a housing cam ring and a base cam ring, which are interlocked only in the driving position within the adjustment range, that is, the housing is in the low housing position, and move axially apart when the housing is pivoted relative to the base shaft along the longitudinal axis from the driving position, and at least partially support each other during further pivoting, that is, the housing is in the high housing position.

6. The adjustment device according to claim 5, wherein: A spring is also provided which surrounds the base shaft and exerts a spring force on the drive ring along the longitudinal axis in the direction of the foot.

7. The adjustment device according to claim 1 or 2, further comprising an electric drive unit, which is included in the housing and is provided with an output element for electrically adjusting the adjustment device, the output element cooperating with the circumference of the drive ring.

8. The adjustment apparatus of claim 1 or 2, further comprising a base cam track disposed on the base shaft.

9. An external rear-view unit for a motor vehicle, comprising an adjustment device according to any one of the preceding claims, and a mirror, a display and / or a camera coupled to a housing.

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