DE102016211028B4 - Longitudinal adjuster for a vehicle seat and vehicle seat - Google Patents

Abstract

Longitudinal adjuster (10) for a vehicle seat (1), having at least two pairs of seat rails (12a, 12b) which are each formed from a lower rail (14a), in particular a seat rail fixed to the vehicle, and an upper rail (14b), in particular a seat rail fixed to the seat, wherein the seat rails (14a, 14b) of each pair of seat rails (12a, 12b) alternately engage around one another and are movable relative to one another in the longitudinal direction (x) and can each be locked to one another by means of a locking device (16), whereby for joint actuation of the two locking devices (16 ) an actuating device (18) with a transmission rod (22) arranged between the two locking devices (16) and a handle (20) connected to the transmission rod (22) is provided, the transmission rod (22) with the two locking devices (16) in each case is operatively connected via a corresponding adapter (100) and the adapter (100 ) for connection to an unlocking lever (40) of the locking device (16) has a profile section (104) with a sectional x-shaped cross section, characterized in that the adapters (100) are designed such that the transmission rod (22) relative to a Connection area (40a) of unlocking levers (40) of the two locking devices (16) is arranged offset downwards.

Description

The invention relates to a longitudinal adjuster for a vehicle seat with the features of the preamble of claim 1 and a vehicle seat.

State of the art

A longitudinal adjuster of the type mentioned is, for example, from DE 10 2006 021 884 B3 known. In this case, a first seat rail connected to the vehicle structure and a second seat rail connected to the seat structure are provided, which alternately encompass one another and are movable relative to one another in the longitudinal direction. Furthermore, a rail lock, which is arranged largely within the rail profile, and an unlocking flap, which is arranged outside the rail profile and acts on the rail lock when actuated, are provided.

From the DE 10 2008 058 518 A1 an actuating arrangement for a rail lock is known which is inserted into an opening in the seat rail from the outside via a lever.

Furthermore, from the DE 10 2015 220 262 A1 a longitudinal adjuster for a vehicle seat is known, the actuating mechanism of which has at least one actuating arm, a release lever and a positioning element which is arranged on the release lever and is pivotably mounted on a free lever end of the release lever. In addition, the actuation mechanism includes a cover that couples the actuation arm to the release lever. The release lever and the cover are arranged one inside the other. In particular, the release lever is arranged in a slot in the cover. The free end of the release lever protrudes from the cover.

task

The invention is based on the object of improving a longitudinal adjuster of the type mentioned at the outset, in particular reducing the installation space required, again in particular a required installation height, and providing a corresponding vehicle seat.

solution

This object is achieved according to the invention by a longitudinal adjuster for a vehicle seat, having at least two pairs of seat rails, which are each formed from a lower rail, in particular a seat rail fixed to the vehicle, and an upper rail, in particular a seat rail fixed to the seat. The seat rails of each pair of seat rails alternately engage around one another and are movable relative to one another in the longitudinal direction. The seat rails of each pair of seat rails can be locked to one another by means of a locking device. For joint actuation, in particular for simultaneous unlocking, of the two locking devices, an actuating device is provided with a transmission rod arranged between the two locking devices and a handle connected to the transmission rod. The transmission rod is operatively connected to the two locking devices in each case via a corresponding adapter, the adapter having a profile section with a partially x-shaped cross section for connection to an unlocking lever of the locking device. Furthermore, the adapters are designed in such a way that the transmission rod is arranged offset downwards relative to a connection area of the unlocking lever.

Because the transmission rod is operatively connected to the two locking devices via a corresponding adapter and the adapters are designed in such a way that the transmission rod is arranged offset downward relative to a connection area of the unlocking lever, the required installation height between a vehicle structure located under the lower rail and a seat structure mounted on the head rail. In this way, for example, the adjustment range for a height adjustment of a seat part of the vehicle seat can be enlarged.

Advantageous configurations which can be used individually or in combination with one another are the subject of the subclaims.

Furthermore, it can be provided that the actuating device does not protrude beyond the locking devices, in particular an unlocking lever of the locking devices, in the vertical direction, in order to further reduce the overall height of the longitudinal adjuster. Furthermore, in particular a central axis of the transmission rod can be arranged offset from a central axis of the connection area. The profile section can be arranged eccentrically to a central axis of the transmission rod. When viewed in the transverse direction, the profile section can have a cross section which has a small height and a comparatively greater width. In this way, for example, radial free play in the connection between the profile section and the connection area of the unlocking lever can be reduced, in particular reduced by approx. 50% compared to a square cross-sectional shape of a corresponding profile section. A central axis in the context of this invention is generally an imaginary axis which is parallel to the transverse direction and runs through the centroid of a cross-sectional area perpendicular to the transverse direction.

The use of adapters also has the advantage that transmission rods of different lengths can be used. This makes it possible to achieve different distances between the pairs of seat rails. Furthermore, it can be provided here that at least one of the adapters is designed integrally with the transmission rod.

Furthermore, it can be provided that at least one of the adapters is non-positively and / or cohesively connected to the transmission rod and / or the actuating device.

In the event of a load, the profile section of the adapter can contact the respectively assigned release lever at four contact points, in particular exactly four contact points. This can ensure a particularly good connection and force transmission between the transmission rod and the release lever.

The object is also achieved by a vehicle seat with a longitudinal adjuster as described above.

Figure list

Before embodiments of the invention are described in more detail below with reference to drawings, it should first be noted that the invention is not limited to the components described or the method steps described. Furthermore, the terminology used does not represent any restriction, but is merely exemplary. Insofar as the singular is used in the description and the claims below, the plural is also included, unless the context explicitly excludes this.

• 1: einen schematisch dargestellten Fahrzeugsitz mit einem erfindungsgemäßen Längseinsteller,
• 2: eine beispielhafte Darstellung eines gattungsgemäßen Längseinstellers,
• 3: einen vergrößerten Ausschnitt des Längseinstellers von 2,
• 4: eine Schnittdarstellung des Ausschnitts des Längseinstellers von 3 senkrecht zur Querrichtung,
• 5: eine der Darstellung von 3 entsprechende Ansicht auf einen erfindungsgemäßen Längseinsteller,
• 6: eine teilweise Querschnittsdarstellung des Längseinstellers von 5,
• 7a: eine perspektivische Darstellung eines Adapters,
• 7b: eine perspektivische Darstellung des Adapters von 7a aus einem unterschiedlichen Blickwinkel,
• 8: eine Schnittdarstellung des Anbindungsbereichs des Entriegelungshebels mit eingesetztem Adapter, und
• 9: eine um das zweite Sitzschienenpaar ergänzte Querschnittsdarstellung von 6.

The invention is explained in more detail below using an advantageous exemplary embodiment shown in the figures. However, the invention is not restricted to this exemplary embodiment. Show it:

• 1 : a schematically shown vehicle seat with a longitudinal adjuster according to the invention,
• 2 : an exemplary representation of a generic longitudinal adjuster,
• 3 : an enlarged section of the longitudinal adjuster from 2 ,
• 4th : a sectional view of the section of the longitudinal adjuster from 3 perpendicular to the transverse direction,
• 5 : one of the representation of 3 corresponding view of a longitudinal adjuster according to the invention,
• 6th FIG. 11 is a partial cross-sectional view of the longitudinal adjuster of FIG 5 ,
• 7a : a perspective view of an adapter,
• 7b : a perspective view of the adapter of 7a from a different point of view,
• 8th : a sectional view of the connection area of the release lever with the adapter inserted, and
• 9 : a cross-sectional view of FIG. 2, supplemented by the second pair of seat rails 6th .

An in 1 vehicle seat shown schematically 1 is described below using three spatial directions running perpendicular to one another. One longitudinal direction x runs with a vehicle seat installed in the vehicle 1 largely horizontal and preferably parallel to a longitudinal direction of the vehicle which corresponds to the normal direction of travel of the vehicle. One to the longitudinal direction x perpendicular transverse direction y is also aligned horizontally in the vehicle and runs parallel to a transverse direction of the vehicle. One vertical direction z runs perpendicular to the longitudinal direction x and perpendicular to the transverse direction y . With a vehicle seat installed in the vehicle 1 runs the vertical direction z parallel to the vertical axis of the vehicle.

The position and direction information used, such as front, rear, top and bottom refer to a viewing direction in the vehicle seat 1 seated occupant in a normal sitting position, with the vehicle seat 1 Installed in the vehicle, in a position of use suitable for transporting people with the backrest upright 5 and is aligned in the direction of travel as usual. The vehicle seat according to the invention 1 however, it can also be installed in a different orientation, for example transversely to the direction of travel.

The in 1 Vehicle seat shown 1 for a motor vehicle has a seat part 3 and one relative to the seat part 3 adjustable backrest 5 on. A slope of the back 5 can for example be adjustable by means of a locking fitting or a gear fitting. The vehicle seat 1 is used to adjust a longitudinal seat position on a longitudinal adjuster 10 assembled.

In 2 is a generic longitudinal adjuster in a perspective view 10 for a vehicle seat 1 shown, for example, from the DE 10 2015 220 262 A1 is known. Of the Length adjuster 10 has two pairs of seat rails 12a , 12b which each consist of a bottom rail 14a , in particular a seat rail fixed to the vehicle, and an upper rail 14b , in particular a seat rail fixed to the seat, are formed. The seat rails 14a , 14b of each pair of seat rails 12a , 12b engage around each other and are in the longitudinal direction x movable relative to each other. Furthermore, the head rails are 14b and the bottom rails 14a of the respective pair of seat rails 12a , 12b by means of a locking device 16 lockable to one another, whereby for the common actuation of the two locking devices 16 an actuator 18th with one of the two locking devices 16 effective connecting transmission rod 22nd is provided, the transmission rod 22nd is designed continuously and with the two locking devices 16 cooperates. The actuator 18th also has one on the transmission rod 22nd attacking handle 20th on.

The handle 20th is closer to the locking device 16 of the inner pair of seat rails 12a than on the locking device 16 of the outer pair of seat rails 12b arranged. With the inner pair of seat rails 12a this usually means the pair of seat rails facing the adjacent driver's seat or front passenger seat on the tunnel side. The outer pair of seat rails 12b usually denotes the pair of seat rails facing a vehicle door. Longitudinal adjuster shown here 10 is therefore designed for use with a passenger seat. A corresponding longitudinal adjuster suitable for a driver's seat 10 would be lengthways x designed mirror-symmetrically.

This results, depending on the distances between the handle 20th to the respective release levers 40 of the two locking devices 16 , a possible distribution of over the handle 20th applied force to 88% on the locking device 16 of the inner pair of seat rails 12a and 12% on the locking device 16 of the outer pair of seat rails 12b . An individual in the respective release lever 40 introduced force can be determined, for example, on the basis of its angle of rotation. Thus, in the case of the generic longitudinal adjuster 10 the locking device 16 of the inner pair of seat rails 12a much more heavily loaded than the locking device 16 of the outer pair of seat rails 12b . For manufacturing and economic reasons, the seat rails 14a , 14b of the two pairs of seat rails 12a , 12b largely manufactured with the same structure and dimensions. This results in the length adjuster being oversized 10 due to a required minimum load capacity.

In 3 is an enlarged section of the longitudinal adjuster 10 from 2 , in particular an area of the connection of the transmission rod 22nd with the one in the top rail 14b arranged locking device 16 shown. 4th shows a sectional view of the section of the longitudinal adjuster 10 from 3 from an angle parallel to the transverse direction y . Below are the 3 and 4th described together.

The transmission rod 22nd has a circular cross-section, but can also be configured differently from this. In the area of the connection of the transmission rod 22nd with the one in the top rail 14b arranged locking device 16 is for better transmission of torque to a release lever 40 the locking device 16 a shape deviating from a rotationally symmetrical cross-sectional shape, in the present case a square cross-sectional shape, is provided. The release lever 40 is partially within the head rail 14b and partly outside, preferably above, the head rail 14b arranged. A pivoting of the release lever 40 causes the locking device to be unlocked 16 .

To secure the release lever 40 against moving in the longitudinal direction x has the release lever 40 at least one in the transverse direction y protruding holding flag 46 on, which is in a corresponding recess, for example a slot-shaped extension on a passage opening 50 in the head rail 14b , is arranged. The release lever 40 is usually with play in the passage opening 50 arranged and can thus when two contact surfaces meet, one each on the release lever 40 and one on the head rail 14b , generate a metallic contact sound.

The locking device 16 comprises at least one plate-shaped locking element 70 , which is movably guided between a locking position and a release position. When the locking element 70 is in the locked position, the two seat rails are 14a , 14b of the respective pair of seat rails 12a , 12b locked together and a corresponding relative movement of the seat rails 14a , 14b each other is inhibited. Usually the locking element is 70 spring-loaded in the direction of the locking position in the top rail 14b held. The locking element 70 the locking device 16 is by means of the release lever 40 can be actuated, in particular movable against a spring force in the direction of the release position. The seat rails are accordingly 14a , 14b longitudinal x displaceable relative to one another when the locking element 70 is in the release position.

The release lever 40 can be a stop 48 as a stopper in the vertical direction z have, in particular as an end stop of a movement of the release lever 40 to in particular the locking element 70 the locking device 16 to protect against excessive stress and abuse. By means of the stop 48 is the release lever 40 on the head rail 14b in the vertical direction z pre-fixed. In other words, the release lever is 40 by means of the stop 48 into the passage opening 50 the head rail 14b hooked. Here is the center of gravity of the release lever 40 to take into account which one is due to the inside of the head rail 14b arranged unspecified arms of the release lever 40 in an area below the stop 48 can be arranged.

For the automatic holding of the handle 20th the actuator 18th in a passive position or rest position, this is by means of a spring element 30th Spring-loaded on the present inner pair of seat rails 12a held. The spring element is for this purpose 30th , present in the form of a leg spring, between the handle 20th and the head rail 14b arranged and tensioned the handle 20th in the direction of the rest position or passive position. The spring element 30th encompasses the transmission rod 22nd in sections and is supported with both ends on the head rail 14b and that of the transmission rod 22nd protruding handle 20th from or tensions the head rail 14b and the handle 20th relative to each other by means of a spring force.

The respective one from the passage opening 50 protruding part of the release lever 40 forms a connection area 40a for non-rotatable mounting or connection with the actuating device 18th and is with a cover 60 Mistake. The respective cover 60 is designed in such a way that it covers the associated connection area 40a the release lever 40 holds positively and / or non-positively enclosed, so that the unlocking lever 40 during the assembly of the transmission rod 22nd on the head rail 14b is held. In addition, the respective cover 60 designed such that the cover 60 an end stopper for the insertable transmission rod to limit an insertion depth 22nd forms so that the inserted transmission rod 22nd by means of the cover 60 between the two pairs of seat rails 12a , 12b is fixable. In the present case, the end stop is designed in the form of a protruding hook.

It also has the cover 60 a retaining element 64 to hold the connection area 40a des into the cover 60 , in particular in a cavity of the cover 60 , introduced release lever 40 , on. The connection area 40a has a holding element 44 on which corresponds to the holding element 64 is formed so that the holding elements 44 , 64 are releasably connected to one another in the assembled state, in particular are connected to one another in a latching manner. The holding element 64 is designed, for example, as a clip or latching hook, the holding element 44 is designed accordingly in the form of a groove or recess.

For easier insertion of the transmission rod 22nd into the cover 60 can cover 60 have an inner-walled guide surface. Furthermore, the cover 60 in one of the head rails 14b facing support area 62 be designed to be flexible in the vertical direction z on the head rail 14b to compensate acting forces. The support area 62 is shaped accordingly for this purpose, for example curved to form a downwardly directed apex and outward at an angle to the transverse direction y inclined.

The 5 and 6th show a length adjuster 10 . The in 5 The section shown shows a length adjuster 10 its transmission rod 22nd with the locking device 16 , in this case the inner pair of seat rails 12a , through an adapter 100 connected is.

To avoid rattling noises and to hold the actuating device automatically 18th in a neutral position or rest position, in which the locking devices 16 are locked, is the handle 20th the actuator 18th spring-loaded against the head rail 14b held. A spring element is used for this 30th , in the present case in the form of a bow spring, between the actuating device 18th and the head rail 14b arranged and tensioned the handle 20th the actuator 18th in the neutral position or rest position.

The one from a passage opening 50 in the head rail 14b outstanding connection area 40a the release lever 40 is with a cover 200 Mistake. The cover 200 is designed in such a way that it has an associated profile section 104 of the adapter 100 holds positively and / or non-positively enclosed, so that the transmission rod 22nd together with the adapter 100 during the assembly of the longitudinal adjuster 10 in the vehicle or on the vehicle seat 1 is held. In addition, the adapter 100 be designed so that this by means of an end stop 108 a limitation of the depth of insertion into an opening 42 the release lever 40 has, so that it is between the two pairs of seat rails 12a , 12b is fixed, in particular is jammed.

The cover 200 can have a support arm 202 have, which in the assembled state in the passage opening 50 the head rail 14b intervenes. The support arm 202 is preferred in the longitudinal direction x relative to the release lever 40 arranged and applied to the release lever 40 parallel to the longitudinal direction x with a preload force. The cover is supported here 200 along with the one in the cover 200 held connection area 40a the release lever 40 by means of the support arm 202 on one lengthways x located edge portion of the passage opening 50 from. By pressing the release lever 40 with a pretensioning force in the longitudinal direction x can be achieved that the retaining flag 46 the release lever 40 with an edge area of the passage opening 50 , especially with one of the support arm 202 opposite edge area, is brought into contact and preferably remains in constant contact. Occasionally occurring contact noises are thus prevented by hitting the retaining lug 46 avoided. The support arm 202 is integral with the cover 200 educated. The support arm 202 is in the area of a free end of the support arm 202 opposite base with a base body of the cover 200 connected.

The cross-sectional representation of 6th can be seen that the transmission rod 22nd along a central axis A. extends. The adapter 100 is designed such that the profile section 104 along a central axis M. extends which parallel, or at a distance a to the central axis A. the transmission rod 22nd runs. The adapter 100 is also via a connecting section 106 with the transmission rod 22nd connected.

In the 7a and 7b is the adapter 100 shown. The adapter 100 has a profile section 104 for connection to the release lever 40 on. The profile section 104 has a non-rotationally symmetrical shape in cross section. The profile section 104 is like in 8th shown, configured X-shaped in cross section. For example, the profile section 104 be made by corresponding groove-shaped recesses in a substantially cuboid base body. At least one of the groove-shaped recesses can be designed in terms of its dimensions in such a way that an end stop 108 is provided, which is the depth of insertion into an opening 42 the release lever 40 limited.

The corresponding groove-shaped recess, which the end stop 108 provides extends in the transverse direction y only in sections along the profile section 104 . The limited insertion depth is reached when a projection of the connection area engages in the groove-shaped recess 40a the release lever 40 with the end stop 108 came into contact. To the profile section 104 includes a connecting section 106 which essentially corresponds to the shape of a truncated cone. The adapter 100 is preferred with the transmission rod 22nd connectable. The cross-section of the connecting section which tapers in diameter 106 serves for a possible connection with transmission rods 22nd different diameter d1 . The transmission rod 22nd is usually designed as a hollow cylinder and is designed according to its diameter d1 completely in the area of a corresponding cross-sectional circumference of the frustoconical connecting section 106 with the adapter 100 connected.

8th shows a sectional view of the connection area 40a the release lever 40 with inserted adapter 100 . The adapter 100 has an x-shaped cross section. The opening 42 in the connection area 40a has one with the x-shaped outer contour of the adapter 100 cooperating inner contour. In other words, the inner contour has the opening 42 of the connection area 40a wedge-like projections, which when inserting the adapter 100 into the corresponding grooves of the profile section which are provided and which form the x-shaped cross-section 104 intervention. Due to the compared with a square cross-section of the profile section 104 longitudinal x Broadened cross-section is also a better clearance of the connection between the profile section 104 and connection area 40a achieved.

By one in the event of incorrect operation of the locking device 16 , for example if the handle is pressed down excessively 20th , caused rotation of the release lever 40 as shown by the arrow 72 indicated, the release lever 40 acted upon with a force so that the profile section 104 at a total of four contact points 110 with the cooperating inner contour of the opening 42 arrives in plant. The release lever 40 device with one of the connection areas 40a spaced end in contact with an underside of the head rail 14b and blocked. In the event of incorrect operation, an even distribution of force is achieved by blocking the release lever 40 caused locking force or blocking force on the transmission rod 22nd ensured. One thus from the transmission rod 22nd over the profile section 104 on the release lever 40 transmitted torque is evenly distributed over the four contact points 110 on the release lever 40 . Likewise, in the case of proper operation, that is, one of the arrow 72 opposite rotational movement of the transmission rod 22nd , an even force distribution of an operating force on the transmission rod via a further four contact points (not shown) 22nd ensured.

9 shows one around the outer pair of seat rails 12b supplemented cross-sectional representation of 6th . The arrangement of the outer pair of seat rails 12b corresponds essentially to a mirror-symmetrical arrangement of the inner seat rail pair 12a .

List of reference symbols

1

Vehicle seat

3

Seat part

5

rest

10

Length adjuster

12a

inner pair of seat rails

12b

outer pair of seat rails

14a

Lower rail

14b

Head rail

16

Locking device

18th

Actuator

20th

Handle

22nd

Transmission rod

24

admission

30th

Spring element

40

Release lever

40a

Connection area

42

Opening (in the release lever 40 )

44

Retaining element

46

Holding flag

48

attack

50

Passage opening (in Oberscheine 14b )

60

cover

62

Support area

64

Retaining element

70

Locking element

72

arrow

100

adapter

104

Profile section

106

Connection section

108

End stop (in the profile section 104 )

110

Contact point

200

cover

202

Support arm

A.

Central axis (of the transmission rod 22nd )

M.

Central axis (of the connection area 40a )

d1

Diameter (of the transmission rod 22nd )

a

distance

x

Longitudinal direction

y

Transverse direction

z

Vertical direction

Claims (9)

Longitudinal adjuster (10) for a vehicle seat (1), having at least two pairs of seat rails (12a, 12b) which are each formed from a lower rail (14a), in particular a seat rail fixed to the vehicle, and an upper rail (14b), in particular a seat rail fixed to the seat, wherein the seat rails (14a, 14b) of each pair of seat rails (12a, 12b) alternately engage around one another and are movable relative to one another in the longitudinal direction (x) and can each be locked to one another by means of a locking device (16), whereby for joint actuation of the two locking devices (16 ) an actuating device (18) with a transmission rod (22) arranged between the two locking devices (16) and a handle (20) connected to the transmission rod (22) is provided, the transmission rod (22) with the two locking devices (16) in each case is operatively connected via a corresponding adapter (100) and the adapter (100 ) for connection to an unlocking lever (40) of the locking device (16) has a profile section (104) with a sectional x-shaped cross section, characterized in that the adapters (100) are designed such that the transmission rod (22) relative to a Connection area (40a) of unlocking levers (40) of the two locking devices (16) is arranged offset downwards. Longitudinal adjuster (10) according to one of the Claims 1 wherein the actuating device (18) does not protrude beyond the locking devices (16), in particular the unlocking levers (40) of the locking devices (16), in the vertical direction (z). Longitudinal adjuster (10) according to one of the Claims 1 or 2 , wherein a central axis (A) of the transmission rod (22) is arranged offset from a central axis (M) of the connection area (40a). Longitudinal adjuster (10) according to one of the Claims 1 to 3 , wherein the profile section (104) is arranged eccentrically to a central axis (A) of the transmission rod (22). Longitudinal adjuster (10) according to one of the Claims 1 to 4th , wherein the profile section (104), viewed in the transverse direction (y), has a cross section which has a small height and a comparatively greater width. Longitudinal adjuster (10) according to one of the Claims 1 to 5 wherein at least one of the adapters (100) is designed integrally with the transmission rod (22). Longitudinal adjuster (10) according to one of the Claims 1 to 6th wherein at least one of the adapters (100) is non-positively and / or cohesively connected to the transmission rod (22) and / or the actuating device (18). Longitudinal adjuster (10) according to one of the Claims 1 to 7th , the profile section (104) of the adapter (100) making contact with the respectively assigned unlocking lever (40) at four contact points (110), in particular exactly four contact points (110), in the event of a load. Vehicle seat (1) with a longitudinal adjuster (10) according to one of the preceding claims.

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