DE102019216331A1 - Seat depth adjustment device for a vehicle seat - Google Patents

Abstract

A seat depth adjustment device (1) for a vehicle seat (2) comprises a base (10), an adjustment element (11) which can be adjusted in relation to the base (10) along an adjustment direction (V) and an electric drive assembly (14) which has an electric motor drive (140 ) for electromotive adjustment of the adjusting element (11) relative to the base (10). The base (10) or the adjusting element (11) has a toothing device (19) with a toothing (191) formed thereon, the electric drive assembly (14) for introducing an adjusting force not being connected to the toothing (191) of the toothing device (19) cooperates.

Description

The invention relates to a seat depth adjustment device for a vehicle seat according to the preamble of claim 1 and a modular system of a seat depth adjustment device.

Such a seat depth adjustment device comprises a base, an adjustment element that can be adjusted to the base along an adjustment direction and an electric drive assembly which has an electromotive drive for electromotive adjustment of the adjustment element relative to the base.

A vehicle seat usually has a seat part assembly which forms a seat surface for a vehicle occupant, and a backrest assembly which is arranged pivotably on the seat part assembly and by means of which a backrest is created for the vehicle occupant. A cushion element, which cushions the seat surface, is usually arranged on the seat part assembly. A seat depth adjustment device is used in this context to change the length of the seat surface, i.e. the extension length of the seat surface starting from the backrest assembly, in order to enlarge or reduce the seat surface for a comfortable seat for the vehicle occupant.

To change the seat surface of the vehicle seat, the adjusting element can be adjusted relative to the base. While the base is, for example, firmly connected to a seat pan forming the seat surface, the adjustment element can be adjusted relative to the base in order to change the size of the seat surface in this way. For example, an upholstery element is arranged on the adjustment element, so that the adjustment of the adjustment element is accompanied directly by a change in the upholstered seat surface.

With one of the DE 10 2009 012 780 B3 known seat depth adjustment device, a carrier plate can be adjusted to form a guide plate, the carrier plate being pretensioned with respect to the guide plate via a spring. The spring is housed in a channel.

With one of the DE 10 2016 124 515 A1 known seat depth adjustment device, a carrier plate is adjustable to a base plate. A manually operable locking mechanism is used to lock the carrier plate in a locked position with the base plate, the locking mechanism being operable to release the lock and thus to be able to manually adjust the carrier plate relative to the base plate.

A seat depth adjustment device can be actuated by an electric motor or manually. In an electric seat depth adjustment device, an electric drive assembly is used which serves to introduce an adjustment force into the adjustment element and thus moves the adjustment element relative to the base by an electric motor. In the case of a manual seat depth adjustment device, on the other hand, a manual drive assembly is provided which establishes a lock between the adjustment element and the base and can be actuated in order to release the lock and thus enable manual adjustment of the adjustment element relative to the base.

In the case of a seat depth adjustment device, there is a fundamental desire on the part of a manufacturer to offer both an electric seat depth adjustment and a manual seat depth adjustment, whereby it should be avoided, as far as possible, that the different configuration of the seat depth adjustment device on the one hand for an electrical adjustment and on the other hand for a manual adjustment Development costs and the number of components to be kept in stock increased significantly. There is basically a need to manufacture a seat depth adjustment device with different configuration options at low cost.

The object of the present invention is to provide a seat depth adjustment device and a modular system of a seat depth adjustment device which allow a variably configurable design of the seat depth adjustment device with cost-effective production.

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

Accordingly, the base or the adjusting element has a toothing device with a toothing formed thereon, the electric drive assembly not interacting with the toothing of the toothing device for introducing an adjusting force.

In the case of the seat depth adjustment device, an adjustment element can be adjusted to a base and, for this purpose, is slidably guided along the adjustment direction on the base. The seat depth adjustment device should in principle be usable with an electric drive assembly and a manual drive assembly, regardless of whether an electric drive assembly or a manual drive assembly is used, identical parts should be used for the adjustment element and the base. This results in a simple, inexpensive production because the base and the adjustment element are manufactured in the same way, regardless of whether an electrical drive assembly or a manual drive assembly is used can be. This reduces the number of different components to be kept available.

When the seat depth adjustment device is configured as an electrical seat depth adjustment, there are assemblies on the adjustment element or the base which have no direct kinematic function for the electrical adjustment of the adjustment element to the base. Thus, in the present case, a toothing device with a toothing formed thereon is arranged on the base or the adjusting element, which has no kinematic function for the introduction of force via the electrical drive assembly. The electric drive assembly introduces an adjustment force into the adjustment element independently of the toothing device.

The toothing device is formed on the base or the adjustment element in order to be able to produce a lock when a manual drive assembly is used. If an electric drive assembly is used for the electric seat depth adjustment, the toothing device is still present, but does not take part in the kinematics of the electric drive assembly.

Nevertheless, the toothing device can also have a structural function when the electric drive assembly is used. Thus, for example, the base or the adjusting element (depending on which component the toothing device is formed on) can be structurally stiffened by the toothing device, so that, for example, the torsional rigidity is improved.

In one embodiment, the toothing device has a web element which extends along the adjustment direction and on which the toothing is formed. The web element protrudes from the respectively assigned component, for example, along a height direction perpendicular to the direction of adjustment. If the toothing device is formed on the base, for example, then the toothing device protrudes from the base along the height direction. If, on the other hand, the toothing device is formed on the adjusting element, the toothing device protrudes from the adjusting element along the height direction. Due to the web element extending along the adjustment direction, the dimensional stability of the respectively assigned component can be increased, so that the torsional rigidity is improved.

In one embodiment, the toothing, which is formed on the toothing device, extends along the adjustment direction in that teeth directed perpendicular to the adjustment direction are lined up along the adjustment direction. The toothing has no direct kinematic function for the electric drive assembly. When using a manual drive assembly, the toothing is used to enable locking in different positions of the adjusting element relative to the base that are spaced from one another along the adjusting direction, so that the adjusting element can be fixed in variable positions relative to the base.

In one embodiment, the toothing device is arranged on one of the adjusting element and the base and has an edge extending along the adjusting direction. The edge serves for the sliding support of a slide on the other of the adjusting element and the base and thus forms a sliding guide via which the adjusting element and the base can be supported with respect to one another. If the toothing device is formed, for example, on the base, the edge is formed, for example, on an end face of the toothing device that is remote from the base and extends along the direction of adjustment. The edge is assigned to a slideway formed on the adjusting element in such a way that the edge can come into contact with the slideway in a supporting manner.

It can be provided here that the edge is not always in sliding contact with the sliding track, but rather is out of contact with the sliding track in the event of low loads. If a load acts between the adjusting element and the base, the edge can, however, come into supporting contact with the sliding track, so that a sliding guide is provided between the edge and the sliding track.

In one embodiment, the electric drive assembly has a gear that can be driven by the drive and a spindle for transmitting an adjusting force to the adjusting element. The seat depth adjustment device can thus be operated by an electric motor in that the adjusting element is adjusted by an electric motor to the base via the electric drive assembly. An adjusting force can be introduced into the adjusting element via the electromotive drive assembly in order in this way to adjust the position of the adjusting element relative to the base for changing the seat surface of the vehicle seat.

The electromotive drive can, for example, be arranged in a stationary manner on the base or on the adjusting element. In operation, the electromotive drive drives the gear, which can be configured, for example, to bring about a relative movement between the gear and the spindle when driven by the drive, so that the adjusting element is moved to the base in this way.

The transmission can for example have a spindle nut which is in threaded engagement with the spindle. While the spindle is held stationary, the spindle nut can be set in a rotary motion by the electric motor drive, for example, so that the spindle nut rolls off the spindle and thereby adjusts the spindle longitudinally along the adjustment direction to the spindle nut.

Also conceivable are, for example, configurations in which the electromotive drive sets the spindle in a rotary motion in order in this way to move a spindle nut which is in thread engagement with the spindle and which is held non-rotatably on the respectively assigned component along the adjustment direction to the spindle move.

In one embodiment, a coupling element is arranged on the spindle, which is positively connected to the other of the adjusting element and the base. A coupling of the spindle with the other of the adjustment element and base is established via the coupling element. If the electromotive drive is arranged, for example, on the base, the spindle is coupled to the adjusting element via the coupling element. If, on the other hand, the electromotive drive is arranged in a stationary manner on the adjusting element, the spindle is coupled to the base via the coupling element. Because the spindle is moved to the gear when driven by the drive, the adjustment element is moved relative to the base and its position is thus adjusted along the adjustment direction.

The coupling element can be formed on the spindle, for example, by plastic injection molding. The coupling element is thus cohesively and in this way non-rotatably connected to the spindle, so that the spindle is supported on the respectively assigned component via the coupling element and is thus connected to the respectively assigned component for power transmission.

In one embodiment, the coupling element has at least one engagement section which is used to engage in an engagement opening formed on the other of the adjusting element and the base. A form-fitting connection between the coupling element and the other of the adjusting element and the base is created via the, for example, web-shaped engagement section. If, for example, the electromotive drive is held stationary on the base and the spindle is correspondingly coupled to the adjusting element via the coupling element, the engagement section formed on the coupling element engages positively in an engagement opening formed on the adjustment element, so that a form-fitting coupling for introducing force into the adjustment element is created.

Advantageously, when the seat depth adjustment device is installed, the coupling element rests with a sliding surface on one of the adjustment element and the base. If the coupling element is coupled, for example, to the adjusting element via the engagement section, the coupling element rests with a sliding surface on the base and is guided over it in a sliding manner on the base. The coupling element is thus received between the adjustment element and the base, whereby the engagement of the engagement section in the engagement opening is secured and thus the positive connection between the coupling element and the respective associated component (for example the adjustment element) cannot be easily released when the seat depth adjustment device is installed.

In one embodiment, a sliding guide is formed on one of the adjusting element and the base, on which the coupling element can be slid over the sliding surface. The coupling element slides along the sliding guide when the adjusting element is adjusted relative to the base. The sliding guide is advantageously designed for smooth, sliding guidance of the coupling element, but without creating support along the transverse direction and thus influencing the determination of the position of the adjusting element on the base along the transverse direction.

In addition to the sliding guide, the toothing device can be formed on one of the adjusting element and the base. The toothing device thus extends parallel to the sliding guide on one of the adjusting element and base and is used for structural reinforcement in an area adjacent to the sliding guide.

In one embodiment, the seat depth adjustment device has a guide device for guiding the adjustment element along the adjustment device on the base. The guide device has a first bearing section arranged on the base, a second bearing section arranged on the base and offset along a transverse direction transverse to the adjustment direction to the first bearing section, a third bearing section arranged on the adjusting element and a third bearing section arranged on the adjusting element along the Transverse direction to the third bearing section offset, fourth bearing section. The first bearing section and the third bearing section are in sliding contact with one another and together form a fixed bearing which fixes the adjustment element along the transverse direction to the base. The second bearing section and the fourth bearing section are sliding against each other and together form a floating bearing that Adjusting element along the transverse direction does not fix to the base.

In the context of the guide device, a fixed bearing and a floating bearing for the bearing guidance of the adjusting element on the base are thus combined with one another.

Via the first bearing section arranged on the base and the third bearing section arranged on the adjustment element, which interact with one another when the seat depth adjustment device is installed, a fixed bearing is provided which fixes the adjustment element along the transverse direction to the base extending transversely to the adjustment direction. The fixed bearing thus creates a support in the transverse direction, by means of which the position of the adjusting element in relation to the base is determined along the transverse direction.

This fixed bearing preferably represents the only support in the transverse direction, so that the position of the adjusting element in relation to the base along the transverse direction is determined exclusively by the fixed bearing formed by the first bearing section and the third bearing section. Further fixed bearings for supporting the adjusting element in relation to the base in the transverse direction may therefore not be present. However, it is also possible, for example, to provide additional guides on outer sides of the adjusting element facing away from one another in the transverse direction, which (also) provide support in the transverse direction.

By contrast, a movable bearing is provided via the second bearing section arranged on the base and the fourth bearing section arranged on the adjusting element. A sliding guide of the adjusting element is thus created on the base via the second bearing section and the fourth bearing section, which interact with one another in the assembled position of the seat depth adjustment device. However, no support in the transverse direction is provided via the floating bearing formed by the second bearing section and the fourth bearing section, so that overdetermination in the support of the adjusting element on the base is avoided.

Because the support along the transverse direction of the adjusting element to the base is defined (exclusively) via the fixed bearing determined by the first bearing section and the third bearing section, overdetermination in the mounting of the adjusting element on the base is avoided. The adjusting element is automatically centered on the base via the fixed bearing in that the adjusting element assumes the position with respect to the base defined by the fixed bearing along the transverse direction. This applies to assembly as well as to changing operating conditions, such as wear and tear or a change in temperature and the associated thermal expansion of materials.

The adjusting element is supported on the base via the floating bearing, in particular along a height direction pointing perpendicular to the transverse direction and perpendicular to the adjusting direction. Via the floating bearing formed by the second bearing section and the fourth bearing section, the adjusting element is thus slidably guided along the adjusting direction on the base, but not fixed along the transverse direction.

In one embodiment, the first bearing section and / or the third bearing section (each) has two bearing flanks which, for example, extend at an angle to one another in a cross-sectional plane extending perpendicular to the adjustment direction. The bearing flanks thus jointly form, for example, a V-shape.

The bearing sections can, for example, be shaped complementary to one another, so that one of the bearing sections forms a V-shaped groove and the other of the bearing sections forms a V-shaped engaging web, the bearing sections being in engagement with one another when the seat depth adjustment device is installed and the adjusting element thereby in a self-centering manner Base is supported and held along the transverse direction in a defined position to the base.

However, it is also conceivable that only one of the bearing sections has two bearing flanks which, for example, jointly form a V-shape. For example, one of the bearing sections can form a V-shaped groove into which the other bearing section engages, wherein the shape of the other bearing section can differ from the V-shape of the groove and the other bearing section can have a round, oval or angular shape, for example.

The support in the transverse direction via the fixed bearing can also be effected via differently shaped bearing sections, for example via the engagement of a guide rod extending along the adjustment direction in an associated guide opening or the like.

While the first bearing section and the third bearing section jointly form a fixed bearing, the second bearing section and the fourth bearing section jointly form a floating bearing that does not provide any support for the adjustment element relative to the base along the transverse direction. For this purpose, the second bearing section and / or the fourth bearing section can be designed, for example, as planar surfaces which are spanned along a direction defined by the transverse direction and the adjustment direction Extend level. A floating bearing in the manner of a sliding guide, which does not provide any support along the transverse direction, is thus provided via the bearing sections.

The bearing sections can be shaped essentially identically and each extend along the plane spanned by the transverse direction and the adjustment direction. The shape of the bearing sections can, however, also differ from one another.

The first bearing section and / or the second bearing section can, in one embodiment, be formed integrally and thus in one piece with the base. Additionally or alternatively, the third bearing section and / or the fourth bearing section can be formed integrally and thus in one piece with the adjusting element. The base and / or the adjustment element can be molded from plastic, for example, wherein the respective bearing sections can be molded integrally into the respective component. The result is simple production and a reduction in the number of components required.

However, it is also conceivable and possible that one or more of the bearing sections are designed as separate components to the base or the adjusting element and the bearing sections are thus attached as separate elements to the base or the adjusting element and are firmly connected to the base or the adjusting element.

In one embodiment, the seat depth adjustment device has at least one connecting element which holds the adjustment element on the base along a height direction pointing perpendicular to the transverse direction and perpendicular to the adjustment direction. The adjustment element can for example be attached to the base along the height direction and, when the seat depth adjustment device is used and arranged as intended on a vehicle seat in a vehicle, viewed along the height direction above the base. The adjustment element is held on the base along the height direction via one or more connecting elements, so that the adjustment element is fixed to the base along the height direction.

The at least one connecting element can be designed, for example, as a bolt element that is used as an additional element for connecting the adjusting element and the base to one another. The at least one connecting element can, however, also be formed integrally and in one piece with one of the adjusting element and the base.

In one embodiment, the at least one connecting element extends through a guide opening extending longitudinally along the adjustment direction on one of the adjustment element and base and is fixed to the other of the adjustment element and base, for example by screwing in. The guide opening can for example be formed on the adjusting element. The at least one connecting element extends through the guide opening on the adjusting element and is fixed on the base, so that the connecting element is moved to the base in the guide opening when the adjusting element is adjusted. Alternatively, however, it is also conceivable that the guide opening is formed on the base and the at least one connecting element is fixed on the adjusting element. In turn, the at least one connecting element moves when the adjusting element is adjusted to the base in the guide opening.

The guide opening can be designed as an elongated hole, for example. The guide opening can be dimensioned such that one end provides a stop for the at least one connecting element so that the adjusting element can only be adjusted in or against the adjusting direction to the base until the connecting element strikes the end of the guide opening. In this way, the adjustment path of the adjustment element to the base can be limited. If both ends of the elongated guide opening each form a stop, the adjustment path of the adjusting element can be adjusted via the guide opening between a fully retracted position (which is assigned to a minimum seat surface of the vehicle seat) and a fully extended position (which is assigned to a maximum enlargement of the seat surface ) be limited.

In one embodiment, the connecting element rests in the guide opening with play, viewed along the transverse direction. The connecting element thus does not create a supporting bearing along the transverse direction of the adjusting element to the base, so that no further fixed bearing is provided via the connecting element and thus an overdetermination in the support of the adjusting element to the base is avoided.

In one embodiment, the at least one connecting element has a head which is arranged on a side of the one of the adjusting element and the base facing away from the other of the adjusting element and base. The at least one connecting element is firmly connected to the other of the adjusting element and the base and extends through a guide opening formed in the one of the adjusting element and the base. Because the head comes to rest on a side of the one of the adjusting element and base facing away from the other side of the adjusting element and base, the adjusting element is thus held on the base and fixed along the height direction to the base.

Between the head and one of the adjustment element and the base, an elastic tensioning element, for example in the form of a spring washer or a wave washer, can be arranged, which causes an elastic tensioning force between the adjustment element and the base. Tolerances can be compensated for by means of such a tensioning element. In addition, changes in operation, for example due to wear and tear or a change in temperature, can be compensated for. A contact force of the adjusting element on the base, which is essentially unchangeable over the service life, can be brought about via the tensioning element without the adjusting element being pressed against the base with too great a force and thus excessively increasing friction between the adjusting element and the base.

A modular system of a seat depth adjustment device comprises a base, an adjustment element that can be adjusted to the base along an adjustment direction, an electric drive assembly that has an electric motor drive for electric motor adjustment of the adjustment element relative to the base, and a manual drive assembly that has a manually operable handle element and a through the grip element has an adjustable locking element for locking the adjusting element to the base in a locked position. The seat depth adjustment device can optionally be used with the electric drive assembly or the manual drive assembly, the base or the adjustment element having a toothing device with a toothing formed thereon for locking with the locking element in the locked position.

The seat depth adjustment device can be configured either as an electric seat depth adjustment or as a manual seat depth adjustment. If an electric seat depth adjustment is to be created, the electric drive assembly is used. If, on the other hand, a manual seat depth adjustment is to be created, the manual drive assembly is used. Regardless of whether the electric drive assembly or the manual drive assembly are used, the same parts are used for the base and the adjustment element, so that the same parts for the base and the adjustment element are used for an electric seat depth adjustment and a manual seat depth adjustment.

A toothing device is formed on the base or the adjustment element, which is used to lock the adjustment element to the base when the manual drive assembly is used. However, the toothing device is also present when the electric drive assembly is used, but when the electric drive assembly is used it does not fulfill any function for introducing force. Nevertheless, even when the electric drive assembly is used, the toothing device can have a structural, stiffening function and a supporting function of the base for the adjustment element.

The advantages and advantageous configurations described above for the (electric) seat depth adjustment device can also be used in the same way with the modular system, so that in this regard reference should be made in full to the above statements.

In one embodiment, the modular system has a first prestressing device for spring-mechanical prestressing of the adjusting element relative to the base. An adjustment of the adjusting element relative to the base in a direction of movement, for example in the direction of adjustment, can be supported via the pretensioning device, so that a movement in this direction of movement takes place with a supporting force by the pretensioning device.

Such a pretensioning device can for example have at least one spring element which is supported on the base via a first spring support and on the adjusting element via a second spring support. The at least one spring element can be designed as a compression spring, for example, which is compressed to the base when the adjusting element is retracted and supports the movement of the adjusting element when the adjusting element is extended. The at least one spring element thus acts between the adjusting element and the base and provides a preload between the adjusting element and the base.

In one embodiment, a first guide channel extending along the adjustment direction is formed on the base, while the adjustment element has a second guide channel extending along the adjustment direction. The at least one spring element is received between the first guide channel of the base and the second guide channel of the adjustment element and is supported above it in a plane perpendicular to the adjustment direction between the base and the adjustment element.

The first guide channel and the second guide channel only partially accommodate the at least one spring element, viewed in a cross-sectional plane perpendicular to the adjustment direction. In particular, the first guide channel and the second guide channel can each encompass the at least one spring element only over an angle that is less than 180 °. Each guide channel is thus open at least on one side, so that the at least one guide element is inserted into the guide channel transversely to the adjustment direction and thus between the Adjusting element and the base can be added.

The manual drive assembly provides locking of the adjustment element to the base and can be actuated to release the lock and thus enable manual adjustment of the adjustment element relative to the base. The manual drive assembly has a handle element that can be manually operated by a user and a locking element that can be adjusted by the handle element for locking the adjustment element to the base in a locked position. In the locked position, the locking element locks the adjusting element to the base, wherein the locking element can be moved by actuating the handle element so that the lock can be canceled and the adjusting element can thus be moved manually to the base.

The manual drive assembly can, for example, have a slide element which is guided displaceably along an actuation direction on one of the adjusting element and base and is operatively connected to the handle element. If the grip element is, for example, actuatable, for example pivotable, arranged on the adjusting element, the slide element is guided linearly displaceably on the adjusting element and can be moved by a certain actuation path by actuating the grip element on the adjusting element. If, on the other hand, the grip element is arranged on the base, the slide element is also arranged on the base and is displaceable on the base.

The slide element is preferably coupled to the locking element in such a way that the locking element can be moved between the locked position and an unlocked position by adjusting the slide element. The movement of the locking element can, for example, take place transversely to the movement of the adjusting element.

In one embodiment, the slide element and / or the grip element are spring-pretensioned via a second pretensioning device along the actuation direction relative to the one of the adjustment element and the base. If the slide element is arranged on the adjustment element, for example, the second preload device provides a spring preload for the grip element and / or the slide element relative to the adjustment element, so that after actuation, the grip element is returned to an initial position together with the slide element. The second pretensioning device can for example have a spring element which is received in a spring guide formed on the slide element, for example in the form of a circumferentially completely or largely closed channel.

The adjusting element is locked to the base in the locked position via the locking element of the manual drive assembly. In the locked position, the locking element is in operative connection with the toothing device, which is designed, for example, in the manner of a toothed rack. If the locking element is arranged, for example, on the adjusting element, the toothing device is formed on the base. If, on the other hand, the locking element is arranged on the base, the toothing device is formed on the adjusting element. By engaging the locking element in the toothing of the toothing device, a lock is established, whereby the locking can be released by moving the locking element, in that the locking element is disengaged from the toothing of the toothing device and the adjusting element can thus be adjusted manually to the base.

• 1 eine schematische Ansicht eines Fahrzeugsitzes;
• 2 eine Ansicht eines Ausführungsbeispiels einer Sitztiefenverstelleinrichtung;
• 3 eine gesonderte Ansicht einer Basis der Sitztiefenverstelleinrichtung, zusammen mit einer elektrischen Antriebsbaugruppe;
• 4 eine Ansicht der Sitztiefenverstelleinrichtung von unten;
• 5 eine Ansicht eines Verstellelements der Sitztiefenverstelleinrichtung von unten;
• 6 eine Ansicht der Basis der Sitztiefenverstelleinrichtung, zusammen mit einer manuellen Antriebsbaugruppe;
• 7 eine Ansicht der Sitztiefenverstelleinrichtung bei Verwendung einer manuellen Antriebsbaugruppe von unten;
• 8 eine Ansicht des Verstellelements bei Verwendung einer manuellen Antriebsbaugruppe von unten;
• 9 eine Schnittansicht durch die Sitztiefenverstelleinrichtung, bei Verwendung einer elektrischen Antriebsbaugruppe;
• 10 eine Schnittansicht im Bereich eines Verbindungselements zur Verbindung des Verstellelements mit der Basis;
• 11 eine vergrößerte Ansicht im Bereich einer Kopplung eines mit einer Spindel verbundenen Koppelelements der elektrischen Antriebsbaugruppe mit dem Verstellelement;
• 12 eine Ansicht des Koppelelements an der Spindel;
• 13 eine Schnittansicht, darstellend das Koppelelement zwischen dem Verstellelement und der Basis;
• 14 eine Ansicht eines Schlittenelements und einer das Schlittenelement vorspannenden Vorspanneinrichtung der manuellen Antriebsbaugruppe; und
• 15 eine Schnittansicht durch die Sitztiefenverstelleinrichtung im Bereich einer das Verstellelement zu der Basis vorspannenden Vorspanneinrichtung.

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

• 1 a schematic view of a vehicle seat;
• 2 a view of an embodiment of a seat depth adjustment device;
• 3 a separate view of a base of the seat depth adjustment device, together with an electric drive assembly;
• 4th a view of the seat depth adjustment device from below;
• 5 a view of an adjusting element of the seat depth adjusting device from below;
• 6th a view of the base of the seat depth adjuster, along with a manual drive assembly;
• 7th a view of the seat depth adjustment device when using a manual drive assembly from below;
• 8th a view of the adjusting element when using a manual drive assembly from below;
• 9 a sectional view through the seat depth adjustment device, when using an electric drive assembly;
• 10 a sectional view in the area of a connecting element for connecting the adjusting element to the base;
• 11 an enlarged view in the area of a coupling of a coupling element connected to a spindle of the electric drive assembly with the adjusting element;
• 12th a view of the coupling element on the spindle;
• 13th a sectional view showing the coupling element between the adjustment element and the base;
• 14th a view of a slide element and a pretensioning device of the manual drive assembly pretensioning the slide element; and
• 15th a sectional view through the seat depth adjustment device in the area of a pretensioning device that prestresses the adjustment element towards the base.

1 shows a vehicle seat in a schematic view 2 , which is a seat part assembly 20th and one reclining with the seat part assembly 20th connected backrest assembly 21 having.

The seat part assembly 20th has a seat frame 200 on, one of which is an upholstery element 202 load-bearing seat pan 201 is arranged over the cushion element 202 forms a padded seat for a vehicle occupant. On the backrest assembly 21 is an upholstery element 210 arranged, which creates a padded support for the back of a vehicle occupant.

The in 1 illustrated vehicle seat 2 has the seat subassembly 20th a seat depth adjustment device 1 on, which is used by the seat pan 201 to adjust the size of the seat provided in order to improve the comfort for a vehicle occupant. The seat depth adjustment device 1 has an adjusting element 11 on that along a direction of adjustment V to the seat pan 201 is adjustable and, for example, a cushion element 203 carries so that by adjusting the adjusting element 11 the upholstery element 203 to the upholstery element 202 moved and thereby one through the seat part assembly 20th created seat can be enlarged or reduced.

2 to 15th show views of an embodiment of a seat depth adjustment device 1 , which is designed either as an electric seat depth adjustment or as a manual seat depth adjustment and optionally with an electric drive assembly 14th , as in 3 to 5 shown, or a manual drive assembly 17th , as in 6th to 8th shown, can be equipped.

The seat depth adjustment device 1 has a base 10 on, which is designed as a surface element and, for example, fixed to the seat pan 201 the seat part assembly 20th connected is. To the base 10 is an adjustment element 11 along a direction of adjustment V adjustable, with the adjusting element 11 an upholstery element 203 can be arranged so that by adjusting the adjusting element 11 the upholstery element 203 adjusted and thereby a seat can be adjusted in size.

Regardless of whether the seat depth adjustment device 1 with an electric drive assembly 14th for electrical adjustment or with a manual drive assembly 17th is designed for manual adjustment, are the basis in the illustrated embodiment 10 and the adjustment element 11 equally trained. In the case of an electric seat depth adjustment and a manual seat depth adjustment, the same parts are therefore used for the base 10 on the one hand and for the adjustment element 11 otherwise used.

The adjustment element 11 is along the direction of adjustment V linear at the base 10 guided. A guide device is used for guidance 12th provided that causes the adjusting element 11 along the direction of adjustment V to the base 10 is displaceable along a transverse direction Q across the direction of adjustment V however, to the base 10 is supported and thus set in a defined manner.

For training the guide device 12th assign the base 10 two storage sections 120 , 121 (see for example 3 ) and the adjustment element 11 two storage sections 122 , 123 (see for example 5 ) when the seat depth adjustment device is installed 1 slide against each other. Like this 3 and 5 in combination with the sectional view according to 9 can be seen, form the bearing sections 120-123 on the one hand a fixed bearing, on the other hand a floating bearing, so that the position of the adjustment element 11 to the base 10 along the transverse direction Q is determined (exclusively) via the fixed bearing, the floating bearing, however, only a sliding support along a perpendicular to the transverse direction Q and the direction of adjustment V extended height direction H creates.

In the illustrated embodiment form the bearing section 120 the base 10 and the storage section 122 of the adjustment element 11 together a fixed camp. How out 9 can be seen, show the bearing sections 120 , 122 two bearing flanks each 120A , 120B , 122A , 122B on that in the in 9 shown, perpendicular to the direction of adjustment V Extended cross-sectional plane are arranged at an (obtuse) angle to one another and bear against one another in pairs, so that the bearing flanks are in contact with one another 120A , 120B , 122A , 122B to each other an overlying guide and support along the transverse direction Q of the adjustment element 11 to the base 10 is created.

How out 9 can be seen, form the bearing flanks in the illustrated embodiment 120A , 120B the base 10 a groove which has a V-shape in cross section. The bearing flanks 122A , 122B on the adjustment element 11 in contrast, form a V-shaped engagement web, which is complementary to that formed by the bearing flanks 120A , 120B at the base 10 shaped groove and engages in the groove to provide a transverse support along the transverse direction Q of the adjustment element 11 to the base 10 to accomplish.

That through the camp sections 120 , 122 The fixed bearing is self-centering. By having a transverse support along the transverse direction Q between adjustment element 11 and the base 10 exclusively through the storage sections 120 , 122 formed fixed bearing exists, there is an overdetermination in the transverse support between the adjusting element 11 and the base 10 avoided. The warehouse sections 120 , 122 act in a self-centering manner, so that the adjusting element during assembly and also during a later change in operation, for example due to wear or changing operating conditions, for example a change in temperature 11 along the transverse direction Q a position to the base 10 occupies that exclusively on the bearing sections forming the fixed bearing 120 , 122 is defined.

The warehouse sections 121 , 123 at the base 10 and the adjustment element 11 In contrast, are designed as surfaces that run along a through the transverse direction Q and the direction of adjustment V Spanned plane are extended and lie flat and thus sliding against one another. About these warehouse sections 121 , 123 (and also via other bearing sections on the adjustment element 11 and the base 10 ) does not become a fixed bearing for storage along the transverse direction Q created.

The warehouse sections 120-123 are integral and one-piece at the base 10 or the adjustment element 11 shaped. The base 10 and the adjustment element 11 can for example be manufactured as plastic parts, for example by plastic injection molding. The warehouse sections 120-123 are molded integrally with the respective components.

However, this is not mandatory. The warehouse sections 120-123 can also be formed by separate elements connected to the respective components.

It should also be noted that the storage section 120 , 122 to form the fixed bearing do not necessarily have to be V-shaped. Other configurations are also conceivable. In particular, it is conceivable that the bearing sections 120 , 122 differ in shape from one another and are not designed to be complementary to one another. A bearing to form a fixed bearing can, for example, also take place by engaging a bearing rod in a guide tube.

The adjustment element 11 is along the height direction H via two connecting elements 13th in the form of bolt elements to the base 10 set.

As shown in the sectional view 10 As can be seen, each has a connecting element 13th a head 131 , one to the head 131 subsequent shaft section 132 and one from the head 131 distant end 133 on. In the illustrated embodiment, each is a connecting element 13th about the end 133 and for example a nut attached to it 134 at the base 10 fixed and therefore fixed at the base 10 held. About the mother 134 can be the base 10 for example firmly with the seat pan 201 be connected. With the shaft section 132 reaches through the connecting element 13th a guide opening formed by an elongated hole 130 on the adjustment element 11 how this looks 10 in sync with 2 and 3 can be seen, so that the adjusting element 11 along the direction of adjustment V to the fasteners 13th with movement of the fasteners 13th in the guide openings 130 is adjustable.

The fasteners 13th serve to adjust the adjustment element 11 along the height direction H at the base 10 to keep. About the fasteners 13th are thus the storage sections in particular 120-123 held in contact with each other, so that the position of the adjustment 11 along the height direction H to the base 10 is fixed.

As from the sectional view according to 10 As can be seen, the shaft section is located 132 with play along the transverse direction Q in the respectively assigned guide opening 130 a. About the fasteners 13th thus there is no overdetermination in the support of the adjusting element 11 along the transverse direction Q to the base 10 created.

How also from 10 can be seen is between the head 131 and the adjustment element 11 at one of the bases 10 remote side of the adjusting element 11 a tensioning element 135 For example, arranged in the form of a spring washer or a wave washer, which is used for elastic bracing of the adjusting element 11 with the base 10 serves. About the clamping element 135 is the adjustment element 11 elastic with the base 10 braced, being about the elastic clamping force a contact force between the adjusting element 11 and the base 10 over the service life of the seat depth adjustment device 1 can be maintained essentially constant and, moreover, tolerances and changing operating conditions can be compensated for.

The guide openings 130 form stops for the connecting elements through their ends 13th to limit the adjustment path of the adjustment element 11 relative to the base 10 out. The adjustment element 11 can move in the direction of adjustment V just so far to the base 10 be moved until the fasteners 13th at the ends of the guide openings 130 have arrived. The adjusting element can also 11 against the direction of adjustment V just so far to the base 10 are retracted until the fasteners 13th at the ends of the guide openings 130 attacks.

The seat depth adjustment device 1 can optionally with an electric drive assembly 14th , as in 2 to 5 shown, or with a manual drive assembly 17th , as in 6th to 8th shown, equipped so that an electrical adjustment or a manual adjustment can be created.

Like, for example 3 can be seen, has the electric drive assembly 14th an electric motor drive 100 in the form of an electric motor with a gear 141 in operative connection and via the transmission 141 with a fixed to the adjusting element 11 arranged spindle 143 is coupled. The drive 140 can, for example, drive a worm drive arranged on a motor shaft, which is connected to one in a housing 142 framed spindle nut of the gearbox 141 is in toothed engagement, so that the spindle nut rotates within the housing through a rotary movement of the motor shaft 142 can be moved. The spindle nut stands with the spindle 143 in thread engagement so that by turning the spindle nut the spindle 143 lengthways along the direction of adjustment V to the transmission 141 can be adjusted.

In the illustrated embodiment, the electric motor drive is 140 together with the gearbox 141 stationary at the base 10 arranged like this 3 in sync with 4th can be seen. Driven by the drive 140 is the spindle 143 lengthways along the direction of adjustment V to the transmission 141 movable and thereby to the base 10 adjustable. On one of the gearboxes 141 remote end is a coupling element 144 on the spindle 143 arranged that for coupling the spindle 143 with the adjustment element 11 and serves to introduce force and when the spindle is adjusted 143 lengthways along the direction of adjustment V together with the spindle 143 is moved.

The coupling element 144 is for example on the spindle (made of metal) 143 integrally formed, for example by means of plastic injection molding, and is therefore firmly bonded and non-rotatably with the spindle 143 connected. The coupling element 144 is non-rotatable between the adjustment element 11 and the base 10 supported so that the spindle 143 non-rotatably between the adjustment element 11 and the base 10 is held.

How out 3 in sync with 11 and 12th can be seen on one of the adjustment elements 11 facing side of the coupling element 144 Engagement sections 145 in the form of along the transverse direction Q elongated webs formed with engagement openings 110 on the adjustment element 11 are positively engaged and above a coupling of the coupling element 144 and above the spindle 143 with the adjustment element 11 create.

As from the sectional view according to 13th can be seen, is the coupling element 144 between the adjustment element 11 and the base 10 a. On one of the adjustment elements 11 opposite side forms the coupling element 144 a sliding surface 146 from that on a sliding guide 15th in the form of a groove at the base 10 and above it along the direction of adjustment V sliding at the base 10 is led. The sliding guide 15th provides a sliding guide for the coupling element 16 along the base 10 available, but without the coupling element 144 along the transverse direction Q to support and thus the over the fixed bearing of the bearing sections 120 , 122 certain transverse positioning of the adjusting element 11 to influence.

Because the coupling element 144 between the base 10 and the adjustment element 11 is received and supported, the connection of the coupling element 144 with the adjustment element 11 about the engaging portion 145 secured. In particular, the support of the coupling element 144 on the sliding guide 15th the base 10 prevents the engaging sections 145 from their positive engagement with the engagement openings 110 on the adjustment element 11 can get.

As opposed to this 6th to 8th As can be seen, the manual drive assembly has 17th a handle element 170 on that about axillary elements 171 pivotable on the adjustment element 11 stored and thus along a pivoting direction S. to the adjustment element 11 is pivotable. The handle element 170 is with a slide element 172 operatively connected to which the handle element 170 articulated via one on the slide element 172 shaped coupling bolt 173 is coupled.

The coupling bolt 173 is parallel to that by the axle elements 171 created pivot axis of the handle element 170 extends, but spaced from the pivot axis, so that a pivoting of the handle element 170 for an adjustment of the slide element 172 along an actuation direction B. on the adjustment element 11 leads.

The slide element 172 is along the direction of actuation B. movable on one of the bases 10 facing underside of the adjusting element 11 guided. By pivoting the handle element 170 in the pan direction S. (please refer 6th ) the slide element 172 in the direction of actuation B. to the adjustment element 11 be moved. The slide element 172 is with a locking element 175 operatively connected by one on the locking element 175 shaped coupling pin on an inclined guide 174 of the slide element 172 is guided in such a way that an actuating movement of the slide element 172 in the direction of actuation B. for adjusting the locking element 175 along the transverse direction Q , i.e. across the direction of actuation B. , he follows.

The locking element 175 serves to lock the adjustment element 11 with the base 10 . The locking element engages in a locked position 175 with a toothing formed on it 176 in a toothing 191 on a locking bar 190 a gear mechanism 19th one like this out 6th can be seen. The gear mechanism 19th is at the base 10 shaped so that by the engagement of the locking element 175 into the gear mechanism 19th the adjustment element 11 to the base 10 is locked.

On one of the adjustment elements 11 facing side of the locking element 175 are bar-shaped engagement elements 177 shaped into the engagement openings 110 of the adjustment element 11 (please refer 11 ) engage slidingly such that the locking element 175 along the transverse direction Q to the adjustment element 11 is adjustable via the engagement elements 177 but along the direction of adjustment V to the adjustment element 11 is set so that the adjusting element 11 via the locking element 175 in position at the base 10 is held when the locking element 175 is in the locked position.

By operating the handle element 170 and by adjusting the slide element 172 in the direction of actuation B. can, with force deflection on the inclined guide 174 (please refer 8th ), the locking element 175 be unlocked by the locking element 175 disengaged from the gear mechanism 19th is brought. After unlocking, the adjustment element can be adjusted manually 11 along the direction of adjustment V to the base 10 possible.

The slide element 172 is how out 6th in combination with the enlarged representation according to 14th can be seen via a pretensioning device 18th compared to the adjustment element 11 spring loaded. The pretensioner 18th has a spring element 180 on that at one end on a spring support 181 on the adjustment element 11 supported and at the other end in a spring guide 182 on the slide element 172 is added so that over the spring element 180 the slide element 172 against the direction of actuation B. to the adjustment element 11 is biased.

Becomes the slide element 172 in the direction of actuation B. to the adjustment element 11 adjusted, the spring element designed as a compression spring is adjusted 180 compressed and thus a tension between the slide element 172 and the adjustment element 11 generated. After actuation is due to the tension of the pretensioning device 18th the slide element 172 and thus also the handle element 170 automatically against the direction of actuation B. reset and returns to a non-actuated starting position.

How out 6th to 8th can be seen is the adjusting element 11 also when using the manual drive assembly 17th via a pretensioning device 16 opposite the base 10 spring-biased, it should be noted that the biasing device 16 basically also when using an electric drive assembly 14th can be used.

The pretensioner 16 has two spring elements 164 on that along the transverse direction Q are spaced from each other and each on the outside of an associated connecting element 13th are arranged. The spring elements 164 are over a spring support at one end 161 at the base 10 (please refer 6th ) and at the other end via a spring support 163 on the adjustment element 11 supported (see 8th ) and thus act directly between the adjustment element 11 and the base 10 .

The spring elements 164 tension the adjustment element 11 opposite the base 10 in the adjustment direction V in front. By means of the spring elements 164 can thus extend the adjustment element 11 in the adjustment direction V to the base 10 are spring-mechanically supported. When the adjustment element is retracted 11 are the spring elements 164 on the other hand tense, so that the retraction of the adjusting element 11 for a reduction in the size of the seat against the direction of adjustment V against the biasing spring force of the spring elements designed as compression springs 164 he follows.

How out 6th and 8th in sync with 15th can be seen are at the base 10 on one of the adjustment elements 11 facing side guide channels 160 shaped in which the spring elements 164 added and on which the spring elements 164 are supported. They are also at one of the bases 10 facing side of the adjusting element 11 Guide channels 162 shaped in which the spring elements 164 are recorded and supported. The guide channels 160 , 162 encompass how out 15th can be seen, an associated spring element 164 each over an angle of less than 180 ° in such a way that the respectively assigned spring element 164 between the guide channels 160 , 162 picked up and on both sides through the guide channels 160 , 162 is supported. A guide for the spring elements 164 is thus between the adjusting element 11 and the base 10 created without the spring elements 164 are each received in a circumferentially closed guide.

For the seat depth adjustment device 1 be for the base 10 and the adjustment element 11 regardless of whether the electric drive assembly 14th or the manual drive assembly 17th is used, the same parts are used. In particular, the base points 10 even when using the electric drive assembly 14th how out 3 can be seen, the gear mechanism 19th when using the manual drive assembly 17th for locking with the locking element 175 serves. Although the gear mechanism 19th when using the electric drive assembly 14th no locking function is fulfilled, it is at the base 10 present and also fulfilled when using the electric drive assembly 14th a stiffening function and also a support and guide function.

So is the gear mechanism 19th by one from the base 10 along the height direction H protruding along the direction of adjustment V extended bar element 190 formed parallel to that at the base 10 shaped sliding guide 15th is extended and an intermediate layer between the sliding guide 15th and the storage section 121 at the base 10 occupies. Due to the longitudinal extension of the web element 190 along the direction of adjustment V can increase the torsional stiffness of the base 10 increased and thus the storage of the adjusting element 11 at the base 10 be improved.

With one of the bases 10 remote edge 192 is the bar element 190 the adjustment element 11 facing, like this from a synopsis of 3 With 9 can be seen. The edge 192 along the direction of adjustment V is extended is in opposition to one on the adjusting element 11 shaped slideway 111 , with the slideway 111 how out 9 can be seen, in a normal operating condition, a distance to the edge 192 of the web element 119, when the adjusting element is loaded 11 , for example by a vehicle occupant, the slideway 111 but with the edge 192 can get into the plant in a supporting manner.

Between the bar element 190 the gear mechanism 19th and the storage section 121 In addition, transverse ribs extend 193 used to further stiffen the base 10 between the gear mechanism 19th and the storage section 121 serve.

The idea on which the invention is based is not restricted to the exemplary embodiments described above, but can also be implemented in other ways.

A seat depth adjustment device of the type described can be used on a front vehicle seat, but also on a vehicle seat in the second or third row of seats in a vehicle.

The base of the seat depth adjustment device can be connected to the seat pan of the vehicle seat, but can also be arranged on another subassembly of a vehicle seat.

List of reference symbols

1

Seat depth adjustment device

10

Base

11

Adjustment element

110

Engagement opening

111

Slideway

12th

Guide device

120, 122

Bearing section (fixed bearing)

120A, 120B

Bearing flanks

122A, 122B

Bearing flanks

121, 123

Bearing section (floating bearing)

13th

Connecting element (bolt element)

130

Guide opening (elongated hole)

131

head

132

Shaft section

133

end

134

mother

135

Tensioning element (spring washer)

14th

Electric drive assembly

140

Electric motor drive

141

transmission

142

casing

143

spindle

144

Coupling element

145

Engaging portion

146

Sliding surface

147

Fastener

15th

Sliding guide

16

Pretensioning device

160, 162

Guide channel

161, 163

Spring support

164

Spring element (compression spring)

17th

Manual drive assembly

170

Handle element

171

Axillary element

172

Slide element

173

Coupling bolt

174

Guide groove

175

Locking element

176

Interlocking

177

Engaging elements

18th

Pretensioning device

180

Spring element

181

Spring support

182

Lead management

19th

Gearing device

190

Bar element

191

Interlocking

192

Edge

193

Transverse ribs

2

Vehicle seat

20th

Seat part assembly

200

Seat frame

201

Seat pan

202

Upholstery element

203

Upholstery element

21

Backrest assembly

210

Upholstery element

B.

Actuation direction

H

Height direction

Q

Transverse direction

S.

Swivel direction

V

Adjustment direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed 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 102009012780 B3 [0005]
• DE 102016124515 A1 [0006]

Claims (27)

Seat depth adjustment device (1) for a vehicle seat (2), with a base (10), an adjustment element (11) which can be adjusted to the base (10) along an adjustment direction (V) and an electric drive assembly (14) which has an electric motor drive (140 ) for electromotive adjustment of the adjusting element (11) relative to the base (10), characterized in that the base (10) or the adjusting element (11) has a toothing device (19) with a toothing (191) formed thereon, wherein the electrical drive assembly (14) for introducing an adjusting force does not interact with the toothing (191) of the toothing device (19). Seat depth adjustment device (1) Claim 1 , characterized in that the toothing device (19) has a web element (190) which extends along the adjustment direction (V) and on which the toothing (191) is formed. Seat depth adjustment device (1) Claim 1 or 2 , characterized in that the toothing (191) extends along the adjustment direction (V) and has teeth directed perpendicular to the adjustment direction (V). Seat depth adjustment device (1) according to one of the Claims 1 to 3 , characterized in that the toothing device (19) is arranged on one of the adjusting element (11) and base (10) and has an edge (192) extending along the adjusting direction (V), which is used for the sliding support of a slide (111) on the the other of the adjusting element (11) and the base (10) is formed. Seat depth adjustment device (1) according to one of the preceding claims, characterized in that the electric drive assembly (14) has a gear (141) drivable by the drive (140) and a spindle (143) for transmitting an adjustment force to the adjustment element (11). Seat depth adjustment device (1) Claim 5 , characterized in that the gear (141) is designed to bring about a relative movement between the spindle (143) and the gear (141) longitudinally along the adjustment direction (V) when driven by the electric motor drive (140). Seat depth adjustment device (1) Claim 5 or 6th , characterized in that a coupling element (144) is arranged on the spindle (143) and is positively connected to the other of the adjusting element (11) and base (10). Seat depth adjustment device (1) Claim 7 , characterized in that the coupling element (144) is formed on the spindle (143) by plastic injection molding. Seat depth adjustment device (1) Claim 7 or 8th , characterized in that the coupling element (144) has at least one engagement section (145) for engaging in an engagement opening (110) formed on the other of the adjusting element (11) and base (10). Seat depth adjustment device (1) according to one of the Claims 7 to 9 , characterized in that the coupling element (144) rests with a sliding surface (146) on one of the adjusting element (11) and the base (10). Seat depth adjustment device (1) Claim 10 , characterized in that a sliding guide (15) is formed on one of the adjusting element (11) and the base (10), on which the coupling element (144) can be slid over the sliding surface (146). Seat depth adjustment device (1) Claim 11 , characterized in that the toothing device (19) extends parallel to the sliding guide (15) on one of the adjusting element (11) and the base (10). Seat depth adjustment device (1) according to one of the preceding claims, characterized by a guide device (12) for guiding the adjusting element (11) along the adjustment direction (V) on the base (10), wherein the guide device (12) has one on the base (10) arranged, first bearing section (120), a second bearing section (121) arranged on the base (10) and offset along a transverse direction (Q) transversely to the adjustment direction (V) to the first bearing section (120), one on the adjusting element (11 ) and a third bearing section (122) arranged on the adjusting element (11) and offset along the transverse direction (Q) to the third bearing section (120), fourth bearing section (122), the first bearing section (120) and the third Bearing section (122) slide against one another and together form a fixed bearing which fixes the adjusting element (11) along the transverse direction (Q) to the base (10), the second bearing section (121 ) and the fourth bearing section (123) slide against one another and together form a floating bearing which does not fix the adjusting element (11) along the transverse direction (Q) to the base (10). Seat depth adjustment device (1) Claim 13 , characterized in that the first bearing section (120) and / or the third bearing section (122) have two bearing flanks (120A, 120B, 122A, 122B). Seat depth adjustment device (1) Claim 14 , characterized in that the bearing flanks (120A, 120B, 122A, 122B) extend at an angle to one another in a cross-sectional plane extending perpendicular to the adjustment direction (V). Seat depth adjustment device (1) according to one of the Claims 13 to 15th , characterized in that the second bearing section (121) and / or the fourth bearing section (123) extend flat along a plane spanned by the transverse direction (Q) and the adjustment direction (V). Seat depth adjustment device (1) according to one of the preceding claims, characterized by at least one connecting element (13) which connects the adjusting element (11) along a height direction (H) on the base (10) that is perpendicular to the transverse direction (Q) and perpendicular to the adjustment direction (V) ) holds. Seat depth adjustment device (1) Claim 17 , characterized in that the at least one connecting element (13) extends through a guide opening (130) extending longitudinally along the adjustment direction (V) on one of the adjustment element (11) and base (10) and on the other of the adjustment element (11) and base (10) is fixed. Seat depth adjustment device (1) Claim 18 , characterized in that at least one end of the guide opening (130) forms a stop for the at least one connecting element (13) in a position of the adjusting element (11) adjusted to the base (10). A modular system of a seat depth adjustment device (1) for a vehicle seat (2), comprising a base (10), an adjustment element (11) which can be adjusted along an adjustment direction (V) relative to the base (10) and an electric drive assembly (14) which has an electric motor drive (140) for the electromotive adjustment of the adjusting element (11) relative to the base (10), characterized by a manual drive assembly (17) which has a manually operable grip element (170) and a locking element (175) which can be adjusted by the grip element (170). for locking the adjustment element (11) to the base (10) in a locked position, the seat depth adjustment device (1) optionally being usable with the electric drive assembly (14) or the manual drive assembly (17), with the base (10) or the adjusting element (11) has a toothing device (19) with a toothing (191) formed thereon for locking with the locking element (175) in the locked position. Modular system according to Claim 20 , characterized by a first pretensioning device (16) for spring-mechanical pretensioning of the adjusting element (11) relative to the base (10). Modular system according to Claim 21 , characterized in that the first pretensioning device (16) has at least one spring element (164) which is supported on a first spring support (161) on the base (10) and on a second spring support (163) on the adjusting element (11). Modular system according to Claim 21 or 22nd , characterized in that the base (10) has a first guide channel (160) extending along the adjustment direction (V) and the adjusting element (11) has a second guide channel (162) extending along the adjustment direction (V), the at least one Spring element (164) is received between the first guide channel (160) and the second guide channel (162). Modular system according to Claim 23 , characterized in that the first guide channel (160) and the second guide channel (162) each receive the at least one spring element (164) in such a way that the spring element (164), in a cross-sectional plane perpendicular to the adjustment direction (V), over an angle less than 180 ° is encompassed by each of the guide channels (160, 162). Modular system based on one of the Claims 20 to 24 , characterized in that the manual drive assembly (17) has a slide element (172) which is displaceably guided along an actuation direction (B) on one of the adjusting element (11) and base (10) and is operatively connected to the handle element (170). Modular system according to Claim 25 , characterized in that the slide element (172) and / or the grip element (170) is spring-biased via a second biasing device (18) along the actuating direction (B) to one of the adjusting element (11) and the base (10). Seat depth adjustment device (1) Claim 26 , characterized in that the second pretensioning device (18) has a spring element (180) which is received in a spring guide (182) formed on the slide element (172).

Images