DE102008004998A1 - Height adjustable vehicle seat, has locking cam of joint arm and bolt of segment cooperate to determine adjusting position, where seat is transferred from adjusting position into another adjusting position in reversible manner - Google Patents

Abstract

The seat has a joint arm (3) connected with a seat rail and a seat structure by respective joints (4, 5) i.e. rotary axes. The seat structure has a circular arc segment (11) with a bolt (10), where the seat is transferred from an adjusting position into another adjusting position in a reversible manner. A locking cam (6) of the joint arm and the bolt of the segment cooperate to determine one of the adjusting positions. The bolt and the locking cam cooperate in a form-fit and/or force-fit manner in the former adjusting position. The segment is rotated around the rotary axis. An independent claim is also included for a method for adjusting a vehicle seat.

Description

The Invention is based on an adjustable vehicle seat with a Articulated arm, wherein the articulated arm via a first joint with a seat rail and a second joint with a Seat structure is connected. The articulated arm has a locking cam and the seat structure has a segment with a rotationally fixed to the Segment attached bolts. The vehicle seat can be from a first reversible position reversibly transferred to a second adjustment position become.

Vehicle seats, which are reversibly convertible from a first adjustment position to a second adjustment position, are well known. In the German Offenlegungsschrift DE 42 24 458 A1 For example, a seat cushion adjustment for a vehicle is disclosed in which, among other things, the seat cushion height adjustment corresponds to the foremost or rearmost position of the seat cushion. Moreover, it is proposed that an adjustment position of the seat cushion can be found by means of a memory unit of the seat. A disadvantage of the known vehicle seat, however, is the complicated structure of the vehicle seat. In addition, the vehicle seat is unstable in particular in the crash situation by the structure, so that an unintentional adjustment of the vehicle seat can be done in a crash.

The Object of the present invention is therefore a vehicle seat to provide, in which the adjustment between two adjustment positions for a user very comfortable and also the Construction with as few components as possible and safe design is.

Solved The task is with an adjustable vehicle seat with a Articulated arm, wherein the articulated arm via a first joint with a seat rail and a second joint with a Seat structure is connected. The articulated arm is around the first Joint (first axis of rotation) rotatably mounted and the seat structure is over the second joint is rotatable about a second axis of rotation. The articulated arm points continue to a locking cam and the seat structure has a segment with a non-rotatably attached to the segment bolt. The vehicle seat can be reversible from a first adjustment position to a second Adjustment be transferred, wherein the locking cam and the bolt interact and thereby at least one adjustment position is determinable. The comfort in an adjustment of the vehicle seat increases thus, since the definition of an adjustment this adjustment position even after the transfer can be found in another adjustment position.

Especially The height of the vehicle seat is preferred the first adjustment position after a reversible transfer the vehicle seat in a second adjustment position recoverable. The vehicle seat is thus preferably height-adjustable.

The first adjustment position is preferably an adjustment within a comfort area. The comfort area is here an area from about 1 to 20 cm within the height of a vehicle seat changeable is. Due to the comfort range, the vehicle seat is also suitable for different sized people optimally height adjustable. Within the comfort area there are consequently a plurality of Altitudes, as the altitude of the first adjustment position to be understood. The second adjustment position is preferred a so-called cargo or compression position, in which the vehicle seat is lowered in the direction of the vehicle floor.

Prefers act in the first adjustment position of the bolts and the locking cam positive and / or non-positive with each other. In an advantageous manner The result is a positive and / or non-positive connection between the bolt and the locking cam in the first adjustment position, whereby a positive and / or non-positive connection is created between the articulated arm and the segment. By the positive and / or non-positive connection between the Locking cams and the bolt is advantageously prevented the seat structure and the articulated arm unintentionally in the direction of the vehicle floor Lower.

Preferably the articulated arm rotatably on an extension and the segment is preferably about the second joint, or about the second axis of rotation, which is formed by the joint, rotatable. Especially preferred the bolt is in the first adjustment position with its lateral surface caught between the locking cam and the extension, where also the Extension and the bolt in the first adjustment position preferred interact positively and / or non-positively.

In the first position is thus preferred upon rotation of the segment about the second axis of rotation by the positive and / or non-positive Connection between the locking cam with the bolt and the extension and the bolt always the articulated arm about a first axis of rotation turned. The vehicle seat is thereby within the comfort range adjustable, especially preferred height adjustable. The just mentioned components are therefore preferably used for height adjustment of the vehicle seat within a comfort area.

Preferably, the locking cam is rotatably mounted on the articulated arm about a third axis of rotation. The locking cam is thus advantageous also from the positive and / or non-positive connection with the bolt rotatable. Preferably, a Federmit spans However, tel the locking cam in the direction of the bolt, so that the locking cam can not be removed without the application of force from the bolt. By the bias of the locking cam in the direction of the bolt unintentional lowering of the seat structure and the articulated arm is prevented in the direction of the vehicle floor. Particularly preferably, the spring means biases the locking cam with such a large force that an unwanted lowering of the vehicle seat can be prevented even in a crash situation. The vehicle seat is thus locked by the bolt and the locking cam with respect to an unintentional displacement in the direction of the vehicle floor.

To the transfer of the vehicle seat in the second adjustment position of the locking cam preferably be rotated against the force of the spring means. After this the locking cam against the force of the spring means in the direction of Turned the vehicle floor, the bolt and the locking cam and act the extension and the bolt preferably no longer form and / or non-positively together. As a result, the articulated arm is around the first rotation axis is rotatable while preferably the segment fixed in position relative to the seat structure is. The fixation of the segment is preferably carried out by a propellant, that is connected to the seat structure and engaged with the segment stands. Without an actuation of the propellant is doing fixed the segment relative to the seat structure.

If the articulated arm about the first axis of rotation in the direction of the vehicle floor turns, lowers by the connection of the articulated arm with the seat structure the second joint also the seat structure in the direction of the vehicle floor. In this case, the bolt slides along the contour of the locking cam, whereby a sudden lowering of the seat structure prevented becomes. Advantageously, such damage the seat structure and the articulated arm by a quick impact the seat structure and the articulated arm on the vehicle floor at a Adjustment to the second adjustment position can be prevented.

Preferably is the position of the locking cam, the bolt and the extension to each other after the transfer of the vehicle seat from a second adjustment position back to a first Adjustment position the same as before the transfer. Since the segment essentially in the second adjustment position the same position on the seat structure occupies as before the adjustment and the bolt rotatably connected to the segment remains, too the bolt relative to the seat structure in the second adjustment position in the same position as the first adjustment position. If the vehicle seat starting from the second adjustment position again is moved in the first adjustment position rotates the articulated arm the first axis of rotation, whereby the vehicle seat lifts. The locking cam is thereby by the spring means for rotation about the third axis of rotation driven. The locking cam is again a positive and / or non-positive Connection with the bolt, as soon as the bolt form and / or positive connection with the extension received is. The rotation of the articulated arm independent of the segment is then stopped. By the same position of the bolt with respect to The seat structure take the bolt, the locking cam and the Extension again the same position to each other as before the Adjustment. The vehicle seat is thus in the same altitude fixed, as before the transfer of the vehicle seat in the second adjustment position. In an advantageous manner is thus the altitude of the first adjustment position recoverable. It creates a so-called memory function, with the memory function advantageous by components for height adjustment in the comfort area and is formed for crash-securing the vehicle seat. For The memory function must therefore advantageously no further Components are installed in the vehicle seat, so that the vehicle seat remains light and the production time is not extended.

Prefers the locking cam forms a stop for the bolt in the second adjustment position, so that advantageously the rotation of the Seat structure is limited in the second adjustment position.

Farther Preferably, the extension forms a stop for the bolt in the first adjustment position, so that advantageous rotation of the segment is limited in the first adjustment position.

Especially Preferably, the locking cam is substantially T-shaped constructed and has a lower edge and a base. The lower edge and the bolt are preferably the positive and / or non-positive Connection in the first adjustment position. Along the base preferably slides the bolt in the adjustment of the vehicle seat in the second adjustment position. In the cargo or compression position the bolt is preferably at an angle of the T-shaped Locking cam on.

Further preferably, the segment has a toothing with which the propellant is engaged. The propellant is preferably a pinion with a toothing. In an adjustment within the first adjustment position, ie an adjustment within the comfort range, the pinion is preferably rotated manually or automatically by a user. Upon rotation of the pinion rotates about the positive and / or non-positive connection between the teeth and the segment about the second axis of rotation. As already described rotates thereby by the positive and / or non-positive connection between the bolt and the locking cam and the bolt and the extension also the articulated arm, whereby the vehicle seat is adjusted in the comfort area.

One Another object of the present invention is a method for height adjustment of a vehicle seat, wherein the height adjustment a propellant is actuated. The propellant combs it with a toothing of a segment, which makes the segment around one second axis of rotation is rotated. The segment is rotatable with a Seat structure connected and rotatably on a bolt. Of the Bolt is at a first adjustment position of the vehicle seat in a positive and / or non-positive connection with a locking cam and an extension, so that an articulated arm, the connected to the locking cam and the extension to a first Rotary axis is rotated when the segment is about the second axis of rotation rotates.

Prefers is for an adjustment of the vehicle seat in a second Adjusting position of the locking cam against the force of a spring means to a third axis of rotation turned. Here, the positive and / or non-positive Connection between the bolt and the locking cam and the extension solved, wherein during a rotation of the articulated arm about the first axis of rotation of the Segment is held rotationally fixed relative to the seat structure.

One Another object of the invention is a method for adjustment a vehicle seat with an adjusting device, wherein the adjusting device Means has with the altitude of a first adjustment position can be found again. By means of the vehicle seat in a first adjustment against unwanted lowering secured in the direction of the vehicle floor and the height adjustment limited in the first adjustment position. Furthermore, by the Means a stop formed, leaving a limit to the height adjustment formed in the second adjustment position becomes. Advantageously, thus by the means the height adjustment the vehicle seat allows and an altitude recovered the first adjustment position. In addition, by the stops formed damage the vehicle seat prevented during adjustment.

The Invention will be described below by means of embodiments illustrated in drawings and described in more detail.

1 schematically represents an exploded view of parts of a height adjustment of a vehicle seat with memory function.

2 schematically illustrates parts of a vehicle seat in a first adjustment position.

3 schematically illustrates the parts of the vehicle seat in a second adjustment position.

In 1 is shown schematically an exploded view of components of an adjusting device for a vehicle seat. In the exemplary embodiment, the adjusting device in this case has a segment 11 on, on the non-rotatably a bolt 10 is attached. The segment 11 is preferably a circular arc segment and is therefore also referred to below as a circular arc segment 11 designated. The vehicle seat includes, among other things, a seat structure 1 the seat part, a bottom-side seat rail 2 for longitudinal adjustment of the vehicle seat as well as a rear articulated arm 3 that with the seat rail 2 and the seat structure 1 in a first and in a second joint 4 . 5 is rotatably connected. Another, not shown in the figures articulated arm is provided in the front region of the seat part. The articulated arms form with the seat rail 2 and the seat structure 1 a four-bar link, over which the vehicle seat relative to the seat rail 2 (and thus with respect to the vehicle floor) is height adjustable. Since the components are rotatable about the joints, is also spoken by axes of rotation with the corresponding reference numerals for the joints. For example, the articulated arm 3 through the first joint 4 around the first axis of rotation 4 rotatable. At the articulated arm 3 is an approximately T-shaped, mass-balanced locking cam 6 around an axis 7 , or third axis of rotation 7 called, rotatably arranged, which in locking position ( 2 ) with a lower edge 8th a base 9 of the locking cam 6 against a bolt 10 acts. The locking cam 6 is doing in a first adjustment position by a spring means 13 , or just spring 13 called, against the bolt 10 or in the direction of the bolt 10 biased. The bolt 10 is on the circular arc segment interlocked on its circumference 11 attached, with the circular arc segment 11 in the area of its center in the joint 5 basically opposite the seat structure 1 and the articulated arm 3 is rotatably formed by the locking cam 6 but relative to the articulated arm 3 rotatable lockable.

In the 2 schematically a first adjustment position is shown. In the first adjustment position of the vehicle seat is preferably adjustable in a comfort area. The bolt 10 is with its lateral surface between the locking cam 6 and one from the joint 5 in the direction of the locking cam 10 pointing extension 14 of the articulated arm 3 captured. The extension 14 lies on the seat structure 1 in the direction of the seat rail 2 seen from above on the bolt 10 on while the bottom edge 8th of the locking cam 6 about 120 ° clockwise down towards the third axis of rotation 7 offset at the bolt 10 is applied. With an adjustment of the circular arc segment 11 about a drive 12 becomes the articulated arm 3 also twisted, whereby the vehicle seat hö for comfort adjustment is adjustable. As a propellant 12 For example, it may be provided with a toothing acting, electric motor or manually driven crack, which is why the term pinion 12 is used. By the bias of the locking cam 6 through the spring center 13 in the direction of the bolt 10 is doing in the adjustment according to 2 the locking cam 6 firmly against the bolt 10 pressed so that even in a crash situation, an unwanted lowering of the seat structure 1 and the articulated arm 3 in the direction of the vehicle floor or the seat rail 2 can be prevented. By a rotation of the locking cam 6 in the direction of arrow A is the positive and / or non-positive connection between the locking cam 6 and the bolt 10 as well as the extension 14 and the bolt 10 solved. After this twisting of the locking cam 6 in the direction of arrow A, ie counterclockwise, the articulated arm 3 then independent of the circular arc segment 11 be pivoted so that the vehicle seat is lowered into a cargo or stowed position, until the bolt 10 at the angle of the T-shaped locking cam 6 is present (see 3 ). Turning the locking cam 6 is done by a separate handle and in this case against the tension of the spring 13 that is counterclockwise. The locking cam 6 forms in the second adjustment position a stop for the bolt 10 out, with the bolt 10 when lowering the seat structure 1 along the contour of the locking cam 6 slides. A quick hit of the seat structure 1 on the vehicle floor or seat rail 2 is thus prevented. To adjust the vehicle seat back to the first adjustment position is the locking cam 6 rotated clockwise, for example by means of actuation of the handle. This locks the locking cam 6 under the driving force of the spring 13 again behind the bolt 10 as soon as this one on the extension 14 is applied. The locking cam 6 is by a corresponding design of the lower edge 8th or secured a separate end stop against further rotation in the opposite direction of the arrow A. Because the spring 13 the locking cam 6 in the clockwise direction, the adjustment of the vehicle seat is facilitated in back to the first adjustment position.

In the 3 is schematically illustrated the second adjustment position, wherein in the second adjustment position of the articulated arm 3 and the seat structure 1 in the direction of the vehicle floor, ie in the direction of the seat rail 2 , were lowered. The circular arc segment 11 However, this is due to the pinion 12 in its position relative to the seat structure 1 fixed. Because thus the position of the circular arc segment 11 relative to the seat structure 1 without an actuation of the pinion 12 does not change, also changes the position of the bolt 10 on the circular arc segment 11 relative to the seat structure 1 Not. As a result, the altitude of the first adjustment position by the circular arc segment 11 and the bolt 10 marked (memory function). As already described, the articulated arm 3 in an adjustment back to the first adjustment position as long to the first axis of rotation 4 Turned until the locking cam 6 and the extension 14 again positive and / or non-positive with the bolt 10 interact. The vehicle seat can thus be rotated when lifting so again in the initial altitude of the first adjustment position, whereby the memory function is achieved. Another turn of the articulated arm 3 is doing by the positive and / or non-positive connection of the locking cam 6 with the bolt and the extension 14 and the bolt 10 prevented.

1

seat structure

2

seat rail

3

articulated arm

4

first Joint / first axis of rotation

5

second Joint / second axis of rotation

6

locking cam

7

Axle / third axis of rotation

8th

Lower edge (locking cams 6 )

9

Base (locking cam 6 )

10

bolt

11

Segment / circular arc segment

12

Drive means / pinion

13

Spring means / spring

14

Extension (articulated arm 3 )

A

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QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4224458 A1 [0002]

Claims (15)

Adjustable vehicle seat with an articulated arm ( 3 ), which has a first joint ( 4 ) with a seat rail ( 2 ) and a second joint ( 5 ) with a seat structure ( 1 ) and the articulated arm ( 3 ) a locking cam ( 6 ) and the seat structure ( 1 ) a segment ( 11 ), wherein the segment ( 11 ) rotatably a bolt ( 10 ), wherein the vehicle seat is reversibly convertible from a first adjustment position to a second adjustment position, characterized in that the locking cam ( 6 ) and the bolt ( 10 ) cooperate and thereby at least one adjustment position can be determined. Fahrzugsitz according to claim 1, characterized in that in the first adjustment position of the bolt ( 10 ) and the locking cam ( 6 ) interact positively and / or non-positively. Vehicle seat according to one of the preceding claims, characterized in that the articulated arm ( 3 ) rotates an extension ( 14 ) and the segment ( 11 ) about a second axis of rotation ( 5 ) is rotatable. Vehicle seat according to one of the preceding claims, characterized in that the locking cam ( 6 ) on the articulated arm ( 3 ) about a third axis of rotation ( 7 ) is rotatably mounted. Vehicle seat according to one of the preceding claims, characterized in that the bolt ( 10 ) in the first adjustment position positive and / or non-positive with the extension ( 14 ) cooperates. Vehicle seat according to one of the preceding claims, characterized in that in the first adjustment position during a rotation of the segment ( 11 ) about a second axis of rotation ( 5 ) by the positive and / or non-positive connection of the articulated arm ( 3 ) about the first axis of rotation ( 4 ) turns. Vehicle seat according to one of the preceding claims, characterized in that during the adjustment of the vehicle seat the locking cam ( 6 ) about the third axis of rotation ( 7 ), wherein the locking cam ( 6 ) against the force of a spring means ( 13 ) or the locking cam ( 6 ) by the spring means ( 13 ) is drivable. Vehicle seat according to one of the preceding claims, characterized in that without positive and / or non-positive connection between the bolt ( 10 ) and the locking cam ( 6 ) and the bolt ( 10 ) and the extension ( 14 ) upon rotation of the articulated arm ( 3 ) about the first axis of rotation ( 4 ) the segment ( 11 ) in its position relative to the seat structure ( 1 ) is fixed. Vehicle seat according to one of the preceding claims, characterized in that after a transfer of the vehicle seat from the second to the first adjustment position of the locking cams ( 6 ) and the bolt ( 10 ) and the extension ( 14 ) have the same position to each other as before the transfer Vehicle seat according to one of the preceding claims, characterized in that the locking cam ( 6 ) in the second adjustment position a stop for the bolt ( 10 ). Vehicle seat according to one of the preceding claims, characterized in that in the first adjustment position of the extension ( 14 ) a stop for the bolt ( 10 ). Vehicle seat according to one of the preceding claims, characterized in that the locking cam ( 6 ) is constructed substantially T-shaped and a lower edge ( 8th ) and a base ( 9 ) and / or the segment ( 11 ) has a toothing. Method for adjusting a vehicle seat, wherein at a height adjustment a propellant ( 12 ) is actuated and the propellant ( 12 ) with a toothing of a segment ( 11 ) meshes, causing the segment ( 11 ) rotatable with a seat structure ( 1 ) is connected to a second axis of rotation ( 5 ) is rotated and a rotationally fixed to the segment ( 11 ) attached bolt ( 10 ) is rotated with, characterized in that in a first adjustment position of the vehicle seat, a locking cam ( 6 ) and an extension ( 14 ) positively and / or non-positively with the bolt ( 10 ), whereby an articulated arm ( 3 ), with the locking cam ( 6 ) and the extension ( 14 ) is connected to a first axis of rotation ( 4 ) is rotated when the segment ( 11 ) about the second axis of rotation ( 5 ) is rotated. A method according to claim 13, characterized in that upon rotation of the locking cam ( 6 ) against the force of a spring means ( 13 ) about a third axis of rotation ( 7 ) the positive and / or non-positive connection between the bolt ( 10 ) and the locking cam ( 6 ) and / or the extension ( 14 ) of the articulated arm ( 3 ) and the bolt ( 10 ) is released, wherein upon rotation of the articulated arm ( 3 ) about the first axis of rotation ( 4 ) the location of the segment ( 11 ) and the bolt ( 10 ) relative to the seat structure ( 1 ) is fixed. Method for adjusting a vehicle seat with an adjusting device, wherein the adjusting device comprises means ( 10 . 6 . 14 ) with which the height position of a first adjustment position is found, characterized in that by the means ( 10 . 6 . 14 ) In addition, the vehicle seat is blocked against accidental adjustment and two Anschlä ge be formed for limiting the height adjustment.