DE102016211024B4 - 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 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 actuating device (18) having a direction relative to a transverse direction (y) asymmetrical arrangement of the handle (20) on the transmission rod (22), wherein the Transmission rod (22) is operatively connected to the locking devices (16) via an adapter (100, 102), characterized in that the two adapters (100, 102) are configured asymmetrically relative to a mirror symmetry plane perpendicular to the transverse direction (y) and the adapters (100, 102) uniformly transmit a torque introduced asymmetrically into the transmission rod (22) via the actuating device (18) to the two locking devices (16).

Description

LENGTH ADJUSTER FOR ONE VEHICLE SEAT AND VEHICLE SEAT

The invention relates to a longitudinal adjuster for a vehicle seat, comprising 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 a respective pair of seat rails mutually engaging around each other and relative in the longitudinal direction are movable to each other. Each pair of seat rails can be locked by means of a locking device, an actuating device with a transmission rod arranged between the two locking devices and a handle connected to the transmission rod being provided for joint actuation of the two locking devices. The actuating device has an arrangement of the handle on the transmission rod which is asymmetrical relative to a transverse direction. The invention also relates to 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 locking device, which is arranged largely within the rail profile, and an unlocking flap, which is arranged outside the rail profile and acts on the locking device when actuated, are provided.

From the DE 10 2008 058 518 A1 an actuating arrangement for a locking device 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.

task

The invention is based on the object of improving a longitudinal adjuster of the type mentioned at the outset, in particular to distribute an operating force or incorrect operating force introduced asymmetrically into the transmission rod evenly to both pairs of rails of a longitudinal adjuster, and to provide a corresponding vehicle seat.

solution

The object is achieved according to the invention by a longitudinal adjuster for a vehicle seat, having at least two pairs of 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 mutually engaging around one another and are movable in the longitudinal direction relative to one another, each pair of seat rails being lockable by means of a locking device, an actuating device with a transmission rod arranged between the two locking devices and a handle connected to the transmission rod being provided for joint actuation of the two locking devices. The actuating device has an arrangement of the handle on the transmission rod which is asymmetrical relative to a transverse direction.

The fact that the transmission rod is operatively connected to the locking devices via an adapter, and the adapters are designed in such a way that a torque introduced via the actuating device is evenly passed on to the two locking devices, makes it possible to design the individual components more easily in accordance with the maximum load capacity. According to the solution proposed according to the invention, both an initiated actuating force and an optionally introduced incorrect operating force can be evenly distributed over both locking devices, so that one-sided overload is avoided. Due to the uniform loading of the locking devices, higher minimum loads, for example up to 600 N, in particular up to 588 N, can be achieved with the existing dimensions. Alternatively, the dimensions of the individual components can also be adapted while maintaining the existing load requirements, whereby a weight reduction and / or a reduction in costs and / or a reduction in the pack size can be achieved. A symmetrical design of the individual components is also conceivable. Due to a symmetrical design, individual parts can be produced in larger quantities and thus manufactured more cost-effectively.

A possible configuration and mode of operation of the locking device is shown in DE 10 2015 220 262 A1 described in more detail, the relevant disclosure content of which is expressly included.

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

According to a further possible embodiment, the two force transmission paths, each comprising the components between the actuating device and correspondingly one of the two locking devices, can have the same torsional strength in the transverse direction despite different lengths. In this case, the components in the force flow are preferably dimensioned according to their respective load capacity and the possible load that may occur. This results in a further advantageous uniform actuation of the two unlocking levers, so that the locking devices, depending on the actuation, in particular unlock and lock at the same time.

Furthermore, the two adapters can be made of different materials. The adapters can for example be made of a plastic material or of metal.

It is also conceivable that at least one of the two adapters is formed integrally with the transmission rod. For example, the adapter can be molded onto the transmission rod.

Furthermore, at least one of the adapters in the direction of the adjoining transmission rod or the adjoining handle can have a connecting section with a diameter that is tapered in relation to a diameter of the transmission rod. This makes it possible to implement a different transmission of force to compensate for the loads on the locking devices. Here, the connecting section with a tapered diameter and the transmission rod can be arranged along a common central axis. This has the advantage that the actuating force acting on the actuating device, in particular a torque resulting therefrom, can be passed on to the two locking devices as a function of the respective diameters to one another.

Another advantage of an adapter solution is that it allows the adapters to be pre-produced as identical parts of a longitudinal adjuster designed according to the modular principle. During the later assembly of the longitudinal adjuster, the length of the transmission rod can, for example, vary and be adapted to the respective needs. The at least one adapter can also be non-positively and / or cohesively connected to the transmission rod and / or the actuating device. In this way, a permanent and correspondingly resilient connection can be provided between the adapter and the transmission rod or the actuating device.

In addition, the transmission rod can be non-positively and / or cohesively connected to the actuating device, whereby a permanent and correspondingly resilient connection can be provided between the transmission rod and the actuating device.

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 is not a restriction, but is merely an example. 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: eine schematische Ansicht eines Fahrzeugsitzes 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 perspektivische Ansicht auf einen erfindungsgemäßen Längseinsteller,
• 6: eine schematische Darstellung eines ersten Adapters,
• 7: eine schematische Darstellung eines zweiten Adapters, und
• 8 eine schematische Ansicht von vorne auf den Längseinsteller von 5.

The invention is explained in more detail below with reference to the advantageous exemplary embodiments shown in the figures. However, the invention is not restricted to these exemplary embodiments. Show it:

• 1 : a schematic view of a 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 : a perspective view of a longitudinal adjuster according to the invention,
• 6th : a schematic representation of a first adapter,
• 7th : a schematic representation of a second adapter, and
• 8th a schematic view from the front of the longitudinal adjuster of 5 .

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, relate 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. 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 grip each other reciprocally 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. 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 Manufactured largely with the same structure and dimensions. This results in an oversizing of the longitudinal adjuster 10 due to a required minimum load capacity.

In 3 is an enlarged section of the longitudinal adjuster 10 of 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 of 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 designed 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 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 shifting in the longitudinal direction x has the release lever 40 at least one in Transverse direction y protruding holding flag 46 on, which is in a corresponding recess, for example a slot-shaped enlargement 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 the rotation 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.

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 its two 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 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 release 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 this can for example 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 outwards at an angle to the transverse direction y inclined.

The in 5 longitudinal adjuster according to the invention shown 10 comprises an actuator 18th , whose transmission rod 22nd with the locking devices 16 each with a corresponding adapter 100 , 102 connected, with the adapter 100 , 102 are designed such that a via the actuating device 18th introduced torque, taking into account a relative to a transverse direction y asymmetrical design of the actuating device 18th evenly on the two locking devices 16 is forwarded.

To avoid rattling noises and to hold the actuating device automatically 18th in a neutral or rest position, in which the locking devices 16 are locked, is the handle 20th the actuator 18th spring-loaded against the length adjuster 10 held. A spring element is used for this 30th , for example a bow spring, a leg spring or helical 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 respective from a passage opening 50 in the head rail 14b outstanding connection area 40a the release lever 40 is designed in such a way that this one - in the 6th and 7th shown and based on the 6th and 7th described in more detail - associated profile section 104 an adapter 100 , 102 holds positively and / or non-positively, so that the transmission rod 22nd together with the adapter 100 , 102 during and after the assembly of the longitudinal adjuster 10 in the vehicle or on the vehicle seat 1 is held. In addition, the respective adapter 100 , 102 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 rails 12a , 12b in the transverse direction y is fixed, in particular is clamped.

In 6th Figure 3 is a schematic representation of a first adapter 100 shown. The first 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 can in cross section x -shaped. 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 the end stop 108 is provided, which is the depth of insertion into the complementary 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 first connection section 106a which essentially corresponds to the shape of a truncated cone. The cross-section of the connecting section, which tapers in diameter 106a is corresponding to the adjoining second connecting section 106b customized. The second connection section 106b serves to connect to the handle 20th and / or the transmission rod 22nd . The second connection section 106b is essentially cylindrical in shape and has the diameter d2 on. The first adapter 100 has a longitudinal extension of the length a on.

In 7th Figure 3 is a schematic representation of a second adapter 102 shown. The structure of the second adapter 102 essentially corresponds to that of the first adapter 100 with the exception that no connection section 106b is provided. The second adapter 102 is preferred with the transmission rod 22nd connected. 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 106a with the second adapter 102 connected.

8th shows a schematic view from the front of the longitudinal adjuster 10 of 5 . The arrangement of the inner pair of seat rails 12a and the outer pair of seat rails 12b as well as the actuator 18th can also be mirrored. In 8th is also the locking device 16 shown. One possible configuration and mode of operation of the locking device 16 is in the DE 10 2015 220 262 A1 described in more detail, the relevant disclosure content of which is expressly included. It is also shown that the first adapter 100 through an opening 42 the release lever 40 the locking device 16 of the inner pair of seat rails 12a inserted through and in the release lever 40 is held. Likewise is the second adapter 102 through an opening 42 the release lever 40 the locking device 16 of the outer pair of seat rails 12b inserted through and in the corresponding release lever 40 held. A corresponding end stop 108 to limit the insertion depth of the two adapters 100 , 102 is also indicated.

In the area of the outer pair of seat rails 12b is the transmission rod 22nd directly to the second adapter 102 connected. The transmission rod 22nd indicates the diameter d1 on. The transmission rod 22nd is preferably cohesive with the adapter 102 connected, in particular welded. The transmission rod 22nd is on her the adapter 102 opposite end with the handle 20th connected. The transmission rod 22nd is preferably cohesive with the handle 20th connected, in particular welded. The transmission rod 22nd has a central axis A. on.

The first adapter 100 is by means of the connecting section 106b with the handle 20th connected, in particular cohesively connected, preferably welded. The connecting section 106b indicates the diameter d2 on. The diameter d2 of the connection section 106b and the diameter d1 the transmission rod 22nd are dimensioned differently. The diameter d2 is preferably smaller than the diameter d1 . The adapter 102 is aligned with the central axis A. the transmission rod 22nd arranged.

Will now be one usually along a vertical direction z oriented force on the free end of the handle 20th then a corresponding torque is applied around the central axis A. onto the transmission rod 22nd and the first adapter 100 transfer. Due to the opposite to the extension of the length b lesser expansion of the length a des in the representation of 8th right area between the handle 20th and the release lever 40 the locking device 16 of the inner pair of seat rails 12b the torsional stiffness of the components in this area is higher than in comparison to the components in the area on the left in the illustration between the handle 20th and the release lever 40 the locking device 16 of the outer pair of seat rails 12b . Due to the different introduction of the torque in sections with different diameters d1 , d2 around the central axis A. , a correspondingly adapted torque is applied to the transmission rod 22nd and the adapter 100 initiated so that the two release levers 40 the opposing locking devices 16 are evenly loaded.

List of reference symbols

1

Vehicle seat

3

Seat part

5

rest

10

Longitudinal 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

100

first adapter

102

second adapter

104

Profile section

106a

Connection section

106b

Connection section

108

End stop (in the profile section 104 )

A.

Central axis (of the transmission rod 22nd )

d1

Diameter (of the transmission rod 22nd )

d2

Diameter (of the connecting section 106b )

a

length

b

length

x

Longitudinal direction

y

Transverse direction

z

Vertical direction

Claims (10)

Longitudinal adjuster (10) for a vehicle seat (1), having at least two pairs of 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 actuating device (18) having a direction relative to a transverse direction (y) asymmetrical arrangement of the handle (20) on the transmission rod (22), wherein the Transmission rod (22) with the Locking devices (16) are each operatively connected via an adapter (100, 102), characterized in that the two adapters (100, 102) are designed asymmetrically relative to a mirror symmetry plane perpendicular to the transverse direction (y) and the adapters (100, 102) Transfer torque introduced asymmetrically into the transmission rod (22) via the actuating device (18) evenly to the two locking devices (16). Longitudinal adjuster (10) according to Claim 1 wherein two power transmission paths, each comprising the components between the actuating device (18) and correspondingly one of the two locking devices (16), have the same torsional strength. Longitudinal adjuster (10) according to one of the Claims 1 or 2 , wherein the two adapters (100, 102) are made of different materials. Longitudinal adjuster (10) according to one of the Claims 1 to 3 wherein at least one of the two adapters (102) is formed integrally with the transmission rod (22). Longitudinal adjuster (10) according to one of the Claims 1 to 4th , wherein at least one adapter (100) has a connecting portion (106b) with a diameter (d2). Longitudinal adjuster (10) according to Claim 5 , wherein the diameter (d2) of the connecting portion (106b) of the adapter (100) is smaller than the diameter (d1) of the transmission rod (22). Longitudinal adjuster (10) according to one of the Claims 5 or 6th wherein the connecting portion (106b) of the adapter (100) and the transmission rod (22) are arranged along a common central axis (A). Longitudinal adjuster (10) according to one of the Claims 1 to 7th wherein the adapter (100, 102) is non-positively and / or cohesively connected to the transmission rod (22) and / or the handle (20). Longitudinal adjuster (10) according to one of the Claims 1 to 8th , wherein the transmission rod (22) is non-positively and / or cohesively connected to the handle (20). Vehicle seat (1) with a longitudinal adjuster (10) according to one of the preceding claims.

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