DE102020212459A1 - Adjustment device for a vehicle seat assembly - Google Patents

Abstract

An adjustment device (1) for a vehicle seat assembly (2) comprises a first adjustment assembly (10, 11), a second adjustment assembly (12, 13) that can be moved to the first adjustment assembly (10, 11) and a locking device (14, 15) that has at least one locking element (140, 150) and one actuating element (141, 151), the at least one locking element (140, 150) locking the first adjustment assembly (10, 11) and the second adjustment assembly (12, 13) in relation to one another locked so that the first adjustment assembly (10, 11) and the second adjustment assembly (12, 13) cannot be moved relative to one another, and wherein the actuating element (141, 151) can be actuated to move the at least one locking element (140, 150) to unlock the To adjust locking device (14, 15). A shaft element (3) which can be rotated about an axis of rotation (D) is used to actuate the actuating element (141, 151). It is provided that the shaft element (3) has a cam section (32, 33) which forms a contact surface (320, 330) for acting on the actuating element (141, 151), the contact surface (320, 330) in a cross section is curved transversely to the axis of rotation (D).

Description

The invention relates to an adjustment device for a vehicle seat assembly according to the preamble of claim 1.

Such an adjustment device comprises a first adjustment assembly, a second adjustment assembly that can be moved relative to the first adjustment assembly, and a locking device. The locking device has at least one locking element and one actuating element. The at least one locking element locks the first adjustment assembly and the second adjustment assembly to one another in a locked position, so that the first adjustment assembly and the second adjustment assembly cannot be moved relative to one another. The actuating element can be actuated in order to adjust the at least one locking element for unlocking the locking device. A shaft element is used to actuate the actuating element and is rotatable about an axis of rotation for this purpose.

Such an adjustment device can be, for example, a longitudinal adjustment device for longitudinal adjustment of a vehicle seat. In this case, adjustment assemblies can be formed, for example, by upper and lower guide rails, which are slidably guided on one another along a longitudinal adjustment direction. The vehicle seat can be locked in a set longitudinal position via a locking device, which is assigned to a pair of guide rails consisting of an upper guide rail and a lower guide rail, and the locking device can be unlocked in order to adjust the longitudinal position of the vehicle seat in this way.

An adjustment device in the form of a longitudinal adjustment device of a vehicle seat is, for example, from DE 10 2007 059 371 A1 famous. A pair of guide rails consisting of an upper guide rail and a lower guide rail can be locked together via a locking device. An actuating element of the locking device formed by an actuating lever can be actuated manually by a user via a shaft element in the form of a so-called “towel bar” in order in this way to unlock the locking device and adjust the vehicle seat longitudinally.

one from the US 2016/272091 A known shaft element for actuating a longitudinal adjustment device is molded from plastic and has sections for acting on actuating elements of locking devices.

the DE 10 2010 014 394 A1 describes a shaft member on which lever portions are formed for acting on locking means.

In longitudinal adjustment devices, such as those from the DE 10 2007 059 371 A1 are known, there is a fundamental need for a simple design of a mechanism for providing a lock. A shaft element, via which a locking device is to be actuated, should be able to be manufactured in a light-weight manner and also be able to be assembled in a simple manner. In addition, there is a need to enable an adjustment device to be actuated comfortably for a user via the shaft element.

It is the object of the present invention to provide an adjustment device for a vehicle seat assembly, in which a shaft element for actuating a locking device can be constructed in a lightweight manner and also enables comfortable activation of the locking device.

This object is solved by an object with the features of claim 1.

Accordingly, the shaft element has a cam section which forms a contact surface for acting on the actuating element, the contact surface being curved in a cross-section transverse to the axis of rotation. The shaft member has a body rotatable about the axis of rotation, which is integrally formed with the cam portion.

While in conventional adjustment devices in the form of longitudinal adjustment devices, a shaft element, also referred to as a "towel bar", forms a lever, which acts with one end of the lever on an associated actuating element of a locking device and is thereby actuated, it is proposed here to design the shaft element with a cam section that a curved contact surface rests against the actuating element and acts on the actuating element via the contact surface during a pivoting movement of the shaft element. The cam portion may be unitary and integrally formed on the shaft member. Due to the curved shape of the contact surface, a leverage effect can be achieved on the cam section, which allows the shaft element to be adjusted comfortably for a user and thus allows the locking device to be operated comfortably.

The adjustment device can be, for example, a longitudinal adjustment device for longitudinal adjustment of a vehicle seat assembly. In this case, for example, the first adjustment assembly can consist of a guide rail be formed, on which the second adjustment assembly, for example also in the form of a guide rail, is slidably guided. The first adjustment assembly can be fixed to a vehicle floor, for example, and thus form a lower guide rail. In contrast, the second adjustment assembly can be assigned to the vehicle seat, for example, and can be displaced relative to the first adjustment assembly.

The shaft element can in particular be formed in one piece and integrally, for example from plastic, with the shaft element forming a cam section for interacting with locking devices of opposing pairs of adjusting assemblies, for example at ends facing away from one another. The cam sections are formed in one piece on the shaft element, resulting in a simple and inexpensive manufacture of the shaft element.

The shaft element can, for example, be rotatably mounted on the second adjustment assembly. During an adjustment movement of the second adjustment assembly relative to the first adjustment assembly, the shaft element is thus moved together with the second adjustment assembly.

The locking device with the at least one locking element and the actuating element can also be arranged on the second adjustment assembly, for example. The actuating element can be actuated via the shaft element that can be rotated relative to the second adjustment assembly, in particular to unlock the locking device and to adjust the at least one locking element relative to the second adjustment assembly, for example in the form of a guide rail, in such a way that the adjustment assemblies are locked in place relative to one another will be annulled.

In one embodiment, the adjustment device has two pairs, each with a first adjustment assembly, a second adjustment assembly and an associated locking device. For example, the adjustment device can have two pairs of guide rails, each with a lower guide rail realizing the first adjustment assembly and an upper guide rail realizing the second adjustment assembly. Each pair of adjustment assemblies is assigned a locking device which is used to lock the adjustment assemblies together and thus holds the adjustment assemblies in position relative to one another in the locked position.

In this case, the shaft element can extend between the two pairs of adjustment assemblies and, for example, can be rotatably mounted on the second adjustment assemblies of the pairs with ends that are remote from one another. The locking devices of the pairs can be actuated by adjusting the shaft element, in particular in order to synchronously unlock the locking devices and thus to be able to adjust the adjustment assemblies relative to one another.

In one configuration, the contact surface has at least one curved section, which has a curvature defined by a radius of curvature. The curvature is thus defined by a radius of curvature in the cross section transverse to the axis of rotation. The radius of curvature is preferably constant within the curved section, it being possible for further curved sections with different radii of curvature to be present, which together form the curved contact surface.

In one embodiment, the radius of curvature, in cross section transverse to the axis of rotation, is determined with reference to a center arranged at a distance from the axis of rotation. The curvature is thus not formed concentrically to the axis of rotation of the shaft element, but rather extends around the center spaced apart from the axis of rotation. The distance can be greater than the radius of curvature, for example, the radius of curvature being greater than or equal to 0.2 times the distance, preferably greater than or equal to 0.3 times the distance, more preferably greater than or equal to 0.5 times the distance. for example the radius of curvature may be in a range between 0.2 and 0.8 times the distance, for example in a range between 0.5 and 0.6 times the distance. A curvature results which is defined by a comparatively large radius of curvature.

In one embodiment, the contact surface has a plurality of curved sections which (viewed in cross section perpendicular to the axis of rotation) have different curvatures each defined by a radius of curvature. The curved sections can adjoin one another, with the contact surface initially abutting the actuating element with the first curved section when the shaft element is adjusted, for example, and then, with a further adjustment, coming into contact with the actuating element with the second curved section adjoining the first curved section.

In cross-section transverse to the axis of rotation, straight sections can also be present on the contact surface, for example in an end position of the shaft element, for example when the shaft element is not actuated and the locking device is locked, the contact surface, for example As with a straight section on the actuating element rests flat.

When the shaft element is actuated in order to adjust the actuating element of the locking device, the contact surface bears against the actuating element at certain points, for example. The contact surface thus acts on the actuating element at a point of action, the point of action corresponding to the point on the contact surface at which the contact surface rests on the actuating element depending on the rotational position of the shaft element. During an adjustment movement of the shaft element, the point of action moves on the contact surface, so that the contact surface acts on the actuating element with a variable point of action that is displaced along the contact surface.

Due to the fact that the point of action is variable, advantageous lever ratios for the force acting on the actuating element can be set. Thus, by changing the point of action, a reduction in the lever arm for adjusting the actuating element (which results from the rotary movement of the shaft element) can be reduced or even eliminated. The result is a comfortable actuation of the shaft element for a user.

The actuating element is adjusted by the introduction of force into the actuating element at the point of action. The actuating element extends approximately tangentially to the contact surface in the area of the point of action. The result is an essentially vertical introduction of force into the actuating element.

In one embodiment, the actuating element is mounted on one of the adjustment assemblies, for example on the second adjustment assembly, so that it can be pivoted about a pivot axis. The actuating element here forms a lever section extending transversely to the pivot axis, for example protruding from the associated adjustment assembly, on which the cam section acts via the contact surface and via which the actuating element is adjusted in particular for unlocking the locking device. With an operating section remote from the lever section, the operating element can be operatively connected to one or more locking elements, for example in the form of locking pins, so that the operating section is adjusted by pivoting the operating element and the locking elements are thereby moved, for example to unlock the locking device.

In one embodiment, the adjusting device has an actuating device connected to the shaft element via a flexible force transmission device. The power transmission device can be formed, for example, by a Bowden cable, which connects the actuating device, for example having a handle that can be actuated by a user, to the shaft element. When the actuating device is actuated, an actuating force is transmitted to the shaft element and the shaft element is correspondingly rotated about the axis of rotation.

The Bowden cable can be formed, for example, by a Bowden cable guided in a Bowden tube. In this case, the Bowden cable can be arranged, for example, on the shaft element, while the Bowden tube is supported, for example, on the adjustment assembly on which the shaft element is arranged. A force can thus be introduced into the shaft element via the Bowden cable and the shaft element can be rotated about the axis of rotation in order to actuate the locking device.

The actuating device in the form of a handle can be arranged, for example, on the vehicle seat, for example in the area of a seat pan or in the area of a backrest. The adjustment device can therefore also be unlocked from a remote position via the actuating device, so that a user can conveniently operate the adjustment device.

In one embodiment, the shaft element has an interface for positively connecting an operating lever to the shaft element. The shaft element and the operating lever can be designed in a modular manner, so that the shaft element can be used either with or without an operating lever.

The interface can, for example, form form-fitting elements, for example in the form of engagement openings for interaction with form-fitting engagement elements. If an operating lever is used, the operating lever can be arranged on the shaft element via the interface and connected in a form-fitting manner to the shaft element, so that a user can grip the operating lever and thereby adjust the shaft element.

The operating lever can be connected to the shaft element in such a way that incorrect operation is counteracted. Thus, when the operating lever is pivoted in a pivoting direction, a force can be introduced into the shaft element. On the other hand, if a user acts on the operating lever counter to the pivoting direction, the connection of the operating lever to the shaft element can be detachable by the form positive connection is canceled so that no power can be transmitted to the shaft element. In this way, a load on the shaft element can be avoided, for example in a position of the shaft element corresponding to the locked position of the locking device, as a result of incorrect actuation.

The shaft element can be made integrally at least partially from plastic. For example, the shaft element can be made entirely of plastic, for example by means of plastic injection moulding. It is also conceivable that the shaft element is made of plastic, but has, for example, one or more insert parts (encapsulated by plastic), for example made of metal, in order to reinforce the shaft element in sections.

For example, such inserts can reinforce the shaft element at highly stressed points, for example by the inserts forming bearing points at the ends of the shaft element. Such inserts can be formed, for example, by hollow-cylindrical (metal) elements or by (metal) elements with a star-shaped cross section.

For example, in one configuration, the shaft element can have a metal core, for example in the form of a tubular element extending along the axis of rotation, which is encapsulated in plastic and onto which one or more cam sections are injection-molded.

• 1 eine Ansicht eines Ausführungsbeispiels einer Verstelleinrichtung in Form einer Längsverstelleinrichtung eines Fahrzeugsitzes, mit einem Wellenelement zum Betätigen von Verriegelungseinrichtungen, in einer verriegelten Stellung;
• 2 die Verstelleinrichtung gemäß 1, in einer entriegelten Stellung der Verriegelungseinrichtungen;
• 3 eine Querschnittansicht durch das Wellenelement in der verriegelten Stellung der Verriegelungseinrichtungen;
• 4 eine Querschnittansicht durch das Wellenelement, in der entriegelten Stellung;
• 5 eine gesonderte Ansicht des Wellenelements;
• 6 eine Draufsicht auf das Wellenelement;
• 7 eine stirnseitige Ansicht eines ersten Endes des Wellenelements;
• 8 eine stirnseitige Ansicht eines dem ersten Ende abgewandten, zweiten Endes des Wellenelements;
• 9 eine vergrößerte Ansicht eines Nockenabschnitts mit einer Anlagefläche und daran geformten, unterschiedlichen Krümmungsabschnitten;
• 10 eine Ansicht eines anderen Ausführungsbeispiels eines Wellenelements, mit einer Schnittstelle zum Anbringen eines Bedienhebels;
• 11 eine Ansicht des Wellenelements, bei angebrachtem Bedienhebel;
• 12 eine gesonderte Ansicht des Bedienhebels; und
• 13 eine Ansicht des Bedienhebels an dem Wellenelement, bei einer Fehlbelastung.

The idea on which the invention is based is to be explained in more detail below with reference to the exemplary embodiments illustrated in the figures. Show it:

• 1 a view of an embodiment of an adjustment device in the form of a longitudinal adjustment device of a vehicle seat, with a shaft element for actuating locking devices, in a locked position;
• 2 the adjusting device according to 1 , in an unlocked position of the locking devices;
• 3 a cross-sectional view through the shaft member in the locked position of the locking means;
• 4 a cross-sectional view through the shaft member, in the unlocked position;
• 5 a separate view of the shaft member;
• 6 a plan view of the shaft member;
• 7 an end view of a first end of the shaft member;
• 8th an end view of a second end of the shaft element facing away from the first end;
• 9 an enlarged view of a cam portion with a contact surface and formed thereon, different curvature sections;
• 10 a view of another embodiment of a shaft member, with an interface for attaching an operating lever;
• 11 a view of the shaft element, with the operating lever attached;
• 12 a separate view of the operating lever; and
• 13 a view of the operating lever on the shaft element, with an incorrect load.

1-4 show an embodiment of an adjustment device 1, which is used to adjust a vehicle seat assembly 2, for example, in particular a seat frame with a seat pan and an adjustable backrest.

The adjustment device 1 has two pairs of adjustment assemblies 10, 11, 12, 13 in the form of guide rails, which can be adjusted relative to one another in order in this way to enable a longitudinal adjustment of the vehicle seat assembly 2 along a longitudinal adjustment direction L. For this purpose, lower guide rails 10, 11, which realize the first adjusting assemblies, are to be arranged on a vehicle floor in a vehicle. Upper guide rails 12, 13, which are slidably guided on the lower guide rails 10, 11, are connected to the vehicle seat assembly 2, so that the vehicle seat assembly 2 can be longitudinally adjusted along the longitudinal adjustment direction L by adjusting the upper guide rails 12, 13.

Each pair of guide rails 10, 11, 12, 13 is assigned a locking device 14, 15, which is used to lock the respective pair of guide rails 10, 11, 12, 13 in a locked position relative to one another such that the guide rails 10, 11, 12, 13 cannot be moved towards one another along the longitudinal adjustment direction L. For this purpose, the locking devices 14, 15 each have locking elements 140, 150 in the form of locking pins, which are arranged on the upper guide rails 12, 13 and engage in the lower guide rails 10, 11 in a locked position, so that a lock is produced as a result.

Each locking device 14, 15 has an actuating element 141, 151 which can be pivoted about a pivot axis 142, 152 on the associated, upper guide rail 12, 13 is mounted and is operatively connected to the locking elements 140, 150. With a lever section 143, 153, the actuating element 141, 151 projects laterally inwards from the associated upper guide rail 12, 13, so that the actuating element 141, 151 can be pivoted about the pivot axis 142, 152 to unlock the associated locking device 14, 15.

A shaft element 3 extends between the pairs of guide rails 10, 11, 12, 13, which is mounted with ends 30, 31 on the upper guide rails 12, 13 so that it can rotate about an axis of rotation D and, for this purpose, can be rotated in bearing openings on the legs of the upper guide rails 12, 13 is recorded. The shaft element 3 is, in the illustrated embodiment, made in one piece and integrally from plastic and can be rotated about the axis of rotation D to actuate the actuating elements 141, 151 and thereby the locking devices 14, 15 from the locked position ( 1 and 3 ) to unlock. In an unlocked position ( 2 and 4 ) the actuating elements 141, 151 are pivoted and as a result the locking elements 140, 150 are raised towards the upper guide rails 12, 13 in such a way that the locking devices 14, 15 are unlocked and the upper guide rails 12, 13 are thus shifted towards the lower guide rails 10, 11 be able.

5 and 6 show separate views of the shaft element 3. The shaft element 3 forms two cam sections 32, 33, which are used to establish an operative connection with the actuating elements 141, 151 of the locking devices 14, 15 and each have a curved shape that is not rotationally symmetrical in cross section transverse to the axis of rotation D exhibit.

7 and 8th show views of the ends 30, 31 of the shaft element 3 with the cam sections 32, 33 formed in the area of the ends 30, 31. Each cam section 32, 33 forms a contact surface 320, 330 which is intended to rest against the lever section 143, 153 of the associated Actuating element 141, 151 is used.

In a cross section transverse to the axis of rotation D, each contact surface 320, 330 forms curved sections 321-323, 331-333, which are curved in cross section transverse to the axis of rotation D and are each defined by an associated, constant radius, as will be explained below with reference to 9 and the cam portion 33 will be explained. A rectilinear section 324, 334 adjoins the curved section 321, 331. In contrast, a rectilinear section 325, 335 adjoins the curved section 323, 333.

Like this out 3 and 4 in synopsis with 9 As can be seen, each cam section 32, 33 acts on the associated actuating element 141, 151 via the contact surface 320, 330. In the locked position, with the shaft element 3 not actuated, the straight section 324, 334 is here in contact with the lever section 143, 153 of the actuating element 141, 151, as shown in FIG 3 is evident. When the shaft element 3 rotates about the axis of rotation D, the contact surface 320, 330 moves relative to the associated lever section 143, 153, so that an effective point P, at which the contact surface 320, 330 rests on the lever section 143, 153, moves along the contact surface 320 , 330 moves.

When the shaft element 3 is rotated to unlock the locking devices 14, 15, the contact surface 320, 330 comes into contact with the lever section 143, 153 in the area of the curved section 321, 331 adjoining the straight section 324, 334. The contact here is selective at an active point P, like this in 9 is drawn. The cam section 32, 33 thus presses selectively on the lever section 143, 153, which extends tangentially along a tangent T to the curved section 321, 331 in the region of the point of action P, as indicated 9 is evident.

The curved section 321, 331 is defined by a radius of curvature R1, which is at least approximately constant over an angular range α1 of the curved section 331 and describes the curvature of the curved section 331 to a center M1. The center M1 is here arranged at a distance A from the axis of rotation D, as shown in FIG 9 can be seen, the distance A being greater than the radius R1. The radius R1 has a value in a range between 0.2 and 0.8 times the distance A, for example a range between 0.5 and 0.6 times the distance A.

Because the shaft element 3 is rotated about the axis of rotation D to unlock the locking devices 14, 15, the point of action P slides along the curved section 321, 331. Due to the comparatively large radius of curvature R1, the point of action P migrates outwards on the contact surface 320, 330 , so that a lever arm, with which the cam section 32, 33 acts on the associated lever section 143, 153, is not or at least only slightly reduced and thus a lever effect for a comfortable introduction of force is provided.

Due to the tangential contact, the force is introduced vertically into the lever section 143, 153.

If necessary, the shaft element 3 can be pivoted to such an extent that the point of action P runs into the curved section 332 . The curved section 332 is defined by a larger radius of curvature R2 to a center M2 and extends over an angular range a2.

The curved section 332 is followed by the curved section 333, which is defined by a radius of curvature R3 that is smaller relative to the radius of curvature R2 to a center M3 and extends over an angular range a3.

Due to the cam shape of the cam sections 32, 33, the shaft element 3 can be actuated comfortably for a user. Due to the shape of the cam, each cam section 32, 33 can also be designed with a comparatively small radial extension, with nevertheless a favorable introduction of force into the respective associated actuating element 141, 151.

The shaft element 3 can look like this 8th can be seen to be spring-biased via a spring element 37 in relation to the guide rail 12 associated with the end 30, so that the shaft element 3 returns to the position associated with the locked position of the locking devices 14, 15 after actuation has taken place 1 and 3 reached. The spring element 37 is supported on the guide rail 12 via a spring end 370 . The spring element 37 is accommodated in a housing section 310 in the area of the end 30 of the shaft element 3 .

In the embodiment shown, the shaft element 3 can be actuated via an actuating device 35 with a handle 350 . The actuating device 35 is arranged, for example, in the region of a seat pan of the associated vehicle seat and is operatively connected to the shaft element 3 via a force transmission device 36 in the form of a Bowden cable. For this purpose, a Bowden tube 360 is supported on a Bowden support 361 and above it on the guide rail 12 . A Bowden cable 362 guided in the Bowden tube 360 is connected to one end 363 (see 8th ) connected to the shaft element 3, so that by adjusting the Bowden cable 362 in the Bowden tube 360, a torque is introduced into the shaft element 3 and the shaft element 3 can be rotated in a pivoting direction V to unlock the locking devices 14, 15.

Like this out 3 and 4 As can be seen, the shaft element 3 is adjusted in the pivoting direction V in order to thereby pivot the actuating elements 141, 151 of the locking devices 14, 15. By rotating the shaft element 3, the lever sections 143, 153 are pressed downwards in an actuation direction B1. As a result, the respective actuating element 141, 151 is pivoted, so that the locking elements 140, 150 are raised in an actuating direction B2 and thereby unlocked.

The shaft member 3 is integrally and in one piece made of plastic, for example. As per this from the separate views 5 and 6 As can be seen, the shaft element 3 has a body 34 with a reinforcing section 340 formed thereon, for example with a rib structure. Recesses 341 and indentations 342 serve to save weight. The shaft member 3 may have such a structure that torque can be reliably transmitted in portions not required for power transmission but no material is provided.

at a in 10-13 In the illustrated embodiment, an interface 38 is formed on a shaft element 3 via which an operating lever 39 can be arranged on the shaft element 3 - in addition or as an alternative to the actuating device 35 and the Bowden cable 36 . Form-fitting elements in the form of engagement openings 380 are formed at the interface 38, via which the operating lever 39 can be positively connected to the interface 38 with form-fitting elements 392 in the form of engagement projections.

The operating lever 39 has a grip portion 390 for a user to grip and a lever portion 391 providing a lever arm. The handle section 390 can be accessible to a user, for example, on a front side of a vehicle seat, so that the operating lever 39 and thus the shaft element 3 for unlocking the adjusting device 1 can be pivoted.

Pivoting of the shaft element 3 in particular in the pivoting direction V can take place here via the operating lever 39 . The connection of the operating lever 39 to the shaft element 3 can be designed in such a way that incorrect operation is counteracted.

So how can this look 13 it can be seen that when the operating lever 39 is subjected to a load in a pivoting direction V' opposite to the pivoting direction V, the connection between the operating element 39 and the shaft element 3 is released, with the operating lever 39 remaining hooked, for example, to the interface 38 of the shaft element 3 and thus being pivoted back into the pivoting direction V, the form-fitting connection of the operating element 39 to the shaft element 3 can be restored. A strain in the swivel Direction V' when the adjusting device 1 is locked does not lead to a transmission of force from the operating lever 39 to the shaft element 3, so that an excessive load on the shaft element 3 is counteracted.

The idea on which the invention is based is not limited to the exemplary embodiments described above, but can also be implemented in a different way.

The adjustment device can advantageously be designed as a longitudinal adjustment device for the longitudinal adjustment of a vehicle seat. However, this is not limiting. A shaft element of the type described can also be used to adjust one or more locking devices in another adjustment device, for example a vehicle seat.

A shaft element can optionally be used with an actuating device in the form of a handle or with an operating lever to be firmly connected to the shaft element.

Reference List

1

adjusting device

10, 11

Adjustment assembly (lower guide rail)

12, 13

Adjustment assembly (upper guide rail)

14, 15

locking device

140, 150

locking element

141, 151

actuator

142, 152

pivot axis

143, 153

lever section

2

vehicle seat assembly

3

wave element

30, 31

ends (trunnions)

310

housing section

32.33

cam section

320, 330

contact surface

321-323

curvature section

331-333

curvature section

324, 325

straight section

334, 335

straight section

34

Body

340

reinforcement section

341

recess

342

indentation

35

actuating device

350

hand lever

36

Power transmission device (Bowden cable)

360

bowden tube

361

Bowden tube support

362

bowden rope

363

End

37

spring element

370

spring end

38

interface

380

access openings

39

operating lever

390

handle section

391

lever section

392

engaging elements

α1-α3

angle

A

Distance

B1, B2

operating direction

D

axis of rotation

L

longitudinal adjustment direction

M1-M3

center

P

point of action

R1-R3

radius of curvature

T

tangent

V, V'

pan direction

QUOTES INCLUDED IN DESCRIPTION

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

Patent Literature Cited

• DE 102007059371 A1 [0004, 0007]
• US2016272091A [0005]
• DE 102010014394 A1 [0006]

Claims (17)

Adjustment device (1) for a vehicle seat assembly (2), with a first adjustment assembly (10, 11), one of the first adjustment assembly (10, 11) movable, second adjustment assembly (12, 13), a locking device (14, 15), the has at least one locking element (140, 150) and one actuating element (141, 151), the at least one locking element (140, 150) locking the first adjustment assembly (10, 11) and the second adjustment assembly (12, 13) in relation to one another locked, so that the first adjustment assembly (10, 11) and the second adjustment assembly (12, 13) cannot be moved towards one another, and wherein the actuating element (141, 151) can be actuated to turn the at least one locking element (140, 150) for unlocking the Locking device (14, 15) to adjust, and about an axis of rotation (D) rotatable shaft element (3) for actuating the actuating element (141, 151), characterized in that the shaft element (3) has a Noc ken section (32, 33), which forms a contact surface (320, 330) for acting on the actuating element (141, 151), the contact surface (320, 330) being curved in a cross section transverse to the axis of rotation (D), the Shaft element (3) has a body (34) which can be rotated about the axis of rotation (D) and which is formed in one piece with the cam section (32, 33). Adjusting device (1) after claim 1 , characterized in that the adjustment device (1) is formed by a longitudinal adjustment device for the longitudinal adjustment of the vehicle seat assembly (2), wherein the first adjustment assembly (10, 11) is formed by a guide rail on which the second adjustment assembly (12, 13) is slidably arranged is. Adjusting device (1) after claim 1 or 2 , characterized in that the adjustment device (1) has two pairs, each with a first adjustment assembly (10, 11), a second adjustment assembly (12, 13) and an associated locking device (14, 15), wherein the shaft element (3) with the Locking device (14, 15) of each pair for actuating the respective actuating element (141, 151) is in operative connection. Adjusting device (1) according to one of Claims 1 until 3 , characterized in that the contact surface (320, 330) has at least one curved section (331-333) which has a curvature defined by a radius of curvature (R1-R3) in cross section transverse to the axis of rotation (D). Adjusting device (1) after claim 4 , characterized in that the radius of curvature (R1, R3), in cross-section transverse to the axis of rotation (D), is determined with respect to a center (M1-M3) arranged at a distance (A) from the axis of rotation (D). Adjusting device (1) after claim 5 , characterized in that the radius of curvature (R1-R3) is greater than 0.2 times the distance (A), preferably greater than 0.3 times the distance (A), more preferably greater than 0.5 times the distance (A) is. Adjusting device (1) according to one of Claims 4 until 6 , characterized in that the contact surface (320, 330) has a plurality of curved sections (331-333) which have different curvatures each defined by a radius of curvature (R1-R3). Adjusting device (1) according to one of Claims 4 until 7 , characterized in that the contact surface (320, 330) has a straight section (334, 335) adjoining a curved section (331-333). Adjusting device (1) according to one of the preceding claims, characterized in that the contact surface (320, 330) is in contact with the actuating element (141, 151) at an active point (P), the active point (P) moving when the Shaft element (3) moves on the contact surface (320, 330). Adjusting device (1) according to one of the preceding claims, characterized in that the actuating element (141, 151) is mounted pivotably about a pivot axis (142, 152) and has a lever section (143, 153) extending transversely to the pivot axis (142, 152). , wherein the cam portion (32, 33) via the abutment surface (320, 330) for actuating the actuating element (141, 151) with the lever portion (143, 153) in abutment. Adjustment device (1) according to one of the preceding claims, characterized in that the shaft element (3) is rotatably mounted on the first adjustment assembly (10, 11) or the second adjustment assembly (12, 13). Adjusting device (1) according to one of the preceding claims, characterized by an actuating device (35) connected to the shaft element (3) via a flexible force transmission device (36). Adjusting device (1) after claim 12 , characterized in that the flexible power transmission device (36) is formed by a Bowden cable. Adjusting device (1) after Claim 13 , characterized in that a Bowden cable (362) guided in a Bowden tube (360) is arranged on the shaft element (3). Adjusting device (1) according to one of the preceding claims, characterized in that the shaft element (3) has an interface (38) for positively connecting an operating lever (39) to the shaft element (3). Adjusting device (1) after claim 15 , characterized in that the operating lever (39) for pivoting the shaft element (3) for unlocking the locking device (14, 15) can be pivoted in a pivoting direction (V) and when actuated in an opposite pivoting direction (V') from the shaft element (3 ) is solvable. Adjusting device (1) according to one of the preceding claims, characterized in that the shaft element (3) is made at least partially of plastic.

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