DE102022124349A1 - Vehicle seat with easy-entry adjustment mechanism without lock - Google Patents

Abstract

A vehicle seat (1) comprises a base (10), a seat part (11) and an adjustment mechanism (12A-12D), via which the seat part (11) is supported on the base (10) and by means of which the vehicle seat (1) is supported by a position of use can be moved into a position that is moved forward relative thereto, the adjustment mechanism (12A-12D) comprising a pivoting lever (120A-120D) which is pivotally mounted on the base (10) about a first pivot axis (S1) and about a second pivot axis (S2) is pivotally mounted on the seat part (10). It is provided that a stop (121A; 121B) is provided on the pivoting lever (120A-120D), which is designed to come into contact with a counter-stop (110A; 110B) when the pivoting lever (120A-120D) is pivoted relative to the seat part (11). ) of the seat part (11).

Description

The proposed solution concerns a vehicle seat.

To make it easier to get into a rear row of seats in a vehicle, e.g. a second or third row of seats, many vehicle seats have a so-called easy-entry function. This allows a backrest or, for example, an entire vehicle seat in a further-forward row of seats to be moved forward. A lever is often attached to the vehicle seat that can be moved forward for this purpose. If this is operated, the backrest or the entire vehicle seat folds forward manually, with spring support or by motor. In order to be able to sit down on the seat that can be folded forward, which can also be referred to as an easy-entry seat, it is moved from the folded-forward easy-entry position back into a position where it can be sat in.

Particularly if not only the backrest but also a seat part of the vehicle seat can be moved forward, comfortable entry into the row of seats behind the vehicle seat can be made possible. However, this usually requires a relatively complex adjustment mechanism, which typically requires many components, the assembly of which in turn takes a lot of time.

Such a vehicle seat, which can be moved from a position of use into a position that is moved forward relative to it, which can also be referred to as an easy entry position, is, for example, from EP 1 397 269 B1 known. The adjustment mechanism described therein is complex and requires a large number of parts.

The object is to provide a vehicle seat that can be moved from a position of use into a position that is moved forward relative thereto with the simplest possible adjustment mechanism.

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

Thereafter, a vehicle seat comprises a base, a seat part and an adjustment mechanism, via which the seat part is supported on the base and by means of which the vehicle seat can be moved from a position of use into a position that is moved forward relative thereto, the adjustment mechanism comprising a pivoting lever which is about a first Pivot axis is pivotally mounted on the base and is pivotally mounted on the seat part about a second pivot axis. It is provided that a stop is provided on the pivoting lever, which is designed to strike a counter-stop of the seat part when the pivoting lever is pivoted relative to the seat part.

The described design of the adjustment mechanism makes it possible to dispense with a lock, which is necessary, for example, in the known vehicle seat. Because the stop that abuts against the counterstop can be used to divide an adjustment path from the position of use into the advanced position into different phases, so that a component of the vehicle seat describes two different paths of movement. This in turn enables locking, for example, of a rear area of the seat part on the base without a lock and only through engagement of a locking element with a corresponding counter-locking element. In this way, the number of components can be significantly reduced and a particularly simple, particularly easy-to-assemble adjustment mechanism is made possible.

During a further pivoting movement of the pivoting lever relative to the seat part, the stop of the pivoting lever in particular takes the counter-stop of the seat part with it, e.g. in such a way that the seat part is set into a pivoting movement about the first pivoting axis. During a first part of the pivoting movement of the pivoting lever from the position of use into the advanced position, the second pivot axis pulls the seat part forward. This also results in a pivoting movement of the pivot lever relative to the seat part about the second pivot axis. As soon as the stop hits the counter-stop, the pivot lever and the seat part pivot together (without any further relative movement to one another) around the first pivot axis. Despite this two-part movement sequence, the adjustment mechanism can be implemented with very few components.

The seat part can have a locking element which interacts with a counter-locking element in the position of use of the vehicle seat. This enables it to be held securely in the position of use. The locking element is fixed, for example, on the seat part. The counter-locking element can be fixed to the base. In particular, the locking element can be held in a counter-locking element in the form of a locking receptacle of the base. Alternatively, the locking element is a receptacle into which the counter-locking element engages.

It can be provided that the locking element is released from the locking receptacle (or generally from engagement with a counter lock) when the vehicle seat is moved from the position of use to the forward position element) of the base is moved out. After the locking element is moved out of engagement with the counter-locking element, for example the locking receptacle, the stop abuts the counter-stop. This enables a particularly simple but at the same time very secure holder in the position of use.

When the vehicle seat is moved from the position of use to the forward position, the locking element describes a path which, for example, has a first (for example straight) section and a second (for example non-straight, e.g. curved, in particular circular arc-shaped) section. This makes it easy to release a lock. For example, in the first section the locking element follows the contour of a locking receptacle. The first section can be straight (e.g. parallel to a longitudinal adjustment direction of the vehicle seat) or curved. In the second section the path can describe a circular arc, in particular around the first pivot axis or around the second pivot axis.

The pivot lever has a first arm which extends, for example, from the first pivot axis to the second pivot axis. The pivot lever may have a second arm that extends from the second pivot axis (e.g. away from the first arm) and has the stop. The first arm and the second arm can be at an angle to each other.

The vehicle seat may further include a drive device for rotating the pivot lever about the first pivot axis relative to the base. This allows convenient motorized adjustment.

The drive device optionally includes a pinion rotatably mounted on the base. This pinion can mesh with a gear that is firmly connected to the pivot lever. This allows for particularly simple but robust mechanics.

Alternatively, the drive device may comprise a linear drive, for example a spindle and a spindle nut engaging therewith, or a rack with a pinion. This also allows for a simple but robust solution.

An elongated element of the linear drive, e.g. the spindle or the toothed stages, can be connected in a rotationally fixed manner to a locking element, which is designed to slide along a stop contour of the seat part. This can prevent the seat part from being raised in the forward position.

For example, in the forward position of the vehicle seat, a rotation of the seat part relative to the pivot lever in one direction of rotation is blocked by the stop resting on the counter-stop of the seat part, and in the opposite direction of rotation, such a rotation is blocked, for example, by the locking element resting on the stop contour. This means that the seat part cannot carry out any unwanted movements.

Optionally, the stop contour is formed by a backdrop. The backdrop is optionally not or not exclusively straight between its two ends. The movement of the seat part can thus be specified in a particularly simple manner.

Optionally, a holding element pivotably mounted on the seat part is guided through a guide on the base. In this way, particularly simple mechanical control of the holding element can be achieved.

The holding element and the counter-stop can be firmly connected to one another, for example formed in one piece. This allows precise control of the movement of the seat part with a simple structure.

In another embodiment, the counter-stop is firmly provided on the seat part. This allows for a particularly simple structure. For example, the counter-stop is formed on a side part of a seat frame of the seat part.

The counter-stop can be formed by a stop backdrop. This makes it possible to simultaneously prevent the seat part from being raised in the forward position.

• 1A-1C einen Fahrzeugsitz mit einem Sitzteil und einer Rückenlehne in einer Gebrauchsstellung, in einer Zwischenstellung und in einer vorverlagerten Stellung;
• 2A-2C Prinzipdarstellungen eines Teils des Fahrzeugsitzes mit einer Verstellmechanik mit einem Ritzelantrieb in der Gebrauchsstellung, in der Zwischenstellung und in der vorverlagerten Stellung;
• 3A-3D Prinzipdarstellungen eines Teils des Fahrzeugsitzes mit einer Verstellmechanik mit einer Anschlagkulisse und einem Ritzelantrieb in der Gebrauchsstellung, in zwei Zwischenstellungen und in der vorverlagerten Stellung;
• 4A-4C Prinzipdarstellungen eines Teils des Fahrzeugsitzes mit einer Verstellmechanik mit einem Sperrelement und einer Spindel in der Gebrauchsstellung, in zwei Zwischenstellungen und in der vorverlagerten Stellung; und
• 5A-5C Prinzipdarstellungen eines Teils des Fahrzeugsitzes mit einer Verstellmechanik mit einer Kulisse und einer Spindel in der Gebrauchsstellung, in zwei Zwischenstellungen und in der vorverlagerten Stellung.

The idea underlying the invention will be explained in more detail below using the exemplary embodiments shown in the figures. Show it:

• 1A-1C a vehicle seat with a seat part and a backrest in a use position, in an intermediate position and in a forward position;
• 2A-2C Principle representations of a part of the vehicle seat with an adjustment mechanism with a pinion drive in the use position, in the intermediate position and in the advanced position;
• 3A-3D Principle representations of a part of the vehicle seat with an adjustment mechanism with a stop link and a pinion drive in the use position, in two intermediate positions and in the forward position;
• 4A-4C Principle representations of a part of the vehicle seat with an adjustment mechanism a locking element and a spindle in the use position, in two intermediate positions and in the advanced position; and
• 5A-5C Principle representations of a part of the vehicle seat with an adjustment mechanism with a link and a spindle in the use position, in two intermediate positions and in the forward position.

1A shows a vehicle seat 1 with a seat part 11 and a backrest 14. The backrest 14 is attached to the seat part 11, in this case pivotable thereto. The vehicle seat 1 further comprises a base 10 on which the seat part 11 is mounted and supported. The vehicle seat 1 is mounted and supported on a vehicle floor 2 of a vehicle via the base 10. In the present case, the base serves as a longitudinal adjustment device. In this case, floor-side rails 102 are fastened to the vehicle floor 2 and the seat part 11 is mounted on seat-side rails 101 which are longitudinally displaceable relative to the floor-side rails 102. Alternatively, the vehicle seat 1 could be mounted directly on the vehicle floor 2 without a longitudinal adjustment device. In this case, for example, a component attached to the vehicle floor 2 or an area of the vehicle floor 2 would serve as a base.

The vehicle seat can be a driver's seat or a passenger seat. However, it can also be a seat in a row of seats further back, for example a seat in a second row of seats.

1A shows the vehicle seat 1 in a seatable position of use. In the use position, a seat user can sit on vehicle seat 1. The vehicle seat 1 can be moved from the position of use into a position that is advanced relative to the position of use by means of an adjustment mechanism 12A. The seat part 11 is supported on the base 10 via the adjustment mechanism 12A. By means of the adjustment mechanism 12A, the vehicle seat 1 can be moved from the position of use into the position that is moved forward relative to it.

1B shows the vehicle seat 1 in an intermediate position between the use position and the forward position. In particular, a rear end region 115 of the seat part is moved further forward, as can be seen from a comparison of 1A with the 1B is visible.

1C shows the vehicle seat in the position that is moved forward compared to the position of use, which can also be referred to as the easy-entry position. The easy-entry position represents a front end position of the adjustment mechanism 12A. In this case, the seat part 11 in particular is pivoted forward relative to the base 10. In the easy-entry position, for example, it can be made easier to get into a rear row of seats located behind the vehicle seat 1.

2A shows the adjustment mechanism 12A, with the vehicle seat 1 configured in the position of use. The adjustment mechanism 12A includes a pivot lever 120A, which is mounted on the base 10 so that it can pivot about a first pivot axis S1 and is mounted on the seat part 10 so that it can pivot about a second pivot axis S2. A stop 121A is provided on the pivoting lever 120A, which is designed to abut against a counter-stop 110A of the seat part 11 during a pivoting movement of the pivoting lever 120A relative to the seat part 11.

The pivot lever 120A is here arranged at a front end of the seat part 11. The pivot lever 120A has a first arm A1 that extends from the first pivot axis S1 to the second pivot axis S2. Furthermore, the pivot lever 120A has a second arm A2, which extends from the second pivot axis S2 and has, or more precisely: forms, the stop 121. The first arm A1 and the second arm A2 are at an angle to one another, in this case at an obtuse angle. The pivot lever 120A can also be referred to as a toggle lever. In the in 2A In the usage position shown, the second arm A2 rests on a stop contour 113A.

In order to effect a pivoting movement of the pivot lever 120A about the first pivot axis S1, the vehicle seat 1 includes a drive device 13A. The drive device 13A includes a motor 130 (with an optional transmission). The motor 130 drives a pinion 131, which is rotatably mounted on the base 10. The pinion 131 meshes with a gear 132. The gear 132 has a larger diameter than the pinion. The gear 132 is fixedly connected to the pivot lever 120A, alternatively coupled thereto for rotation. In the example shown, the gear 132 can be rotated about the first pivot axis S1. Activation of the motor 130 thus causes the pivot lever 120A to rotate about the first pivot axis S1.

If the motor 130 is activated in such a way that the pivot lever 120A moves along the 2A shown arrow, the pivot lever 120A lifts the front part of the seat part 11 and takes it along in this movement. The rear part of the seat part 11, on the other hand, is not lifted, since a torque is not transmitted from the pivot lever 120A to the seat part 11 due to the pivotability of the seat part 11 about the second pivot axis S2 in the position of use. Therefore, when leading out of the position of use the pivoting movement of the pivot lever 120A, the rear part of the seat part 11 is pulled forward. The rear end of the seat part 11 performs a rotary movement about its support point.

In order to secure the seat part 11 against lifting in the position of use, the seat part 11 has a locking element 111, which cooperates with a counter-locking element in the position of use of the vehicle seat 1, in the present case being held in a locking receptacle 100 of the base 10. The locking element 111 can be moved out of the locking receptacle 100 of the base 10 when the vehicle seat 1 is moved from the position of use to the forward position. 2A illustrates a path P that the locking element 111 travels. As a result of the already described movement of the seat part 11 during a pivoting movement of the pivoting lever 120A, the locking element 111, which is spaced from the second pivot axis S2, is pulled out of the locking receptacle 100 along a straight line (generally: along a contour of the locking receptacle, along which the locking element slides) ( the locking element is rotated). The locking element 111 (which is designed, for example, in the form of a bolt) is displaced along a first, rectilinear section of the path P until it is in the position according to 2 B reached.

In the position according to 2 B the stop 121A of the pivot lever 120A abuts the counter-stop 110A of the seat part 11. During a further pivoting movement of the pivoting lever 120A relative to the seat part 11, the stop 121A of the pivoting lever 120A takes the counter-stop 110A of the seat part 11 with it in such a way that the seat part 11 is set into a pivoting movement about the first pivot axis S1 and is taken along. From this point onwards, the seat part 11 also describes a pivoting movement about the first pivot axis S1. Accordingly, the path P has a second section which runs in the shape of a circular arc.

An optional spring 122, which in 2 B is only sketched, is designed in particular in the form of a torsion bar spring and supports the forward displacement of the seat part 11. The spring 122 can act on the seat part 11, alternatively, for example, on the pivot lever 120A.

2C shows the forward position, which makes it easier to get into the rear row of seats.

The vehicle seat 1 thus includes an easy-entry adjustment mechanism without a lock.

3A shows an adjustment mechanism 12B, which is constructed similarly to the adjustment mechanism 12A explained above, so that only differences will be described in detail below. In the case of the adjustment mechanism 12B, the counter-stop 110B of the stop 121B of the pivot lever 120B is not (as in the case of the adjustment mechanism 12A according to 2A-2C ) is fixed on the seat part 11, but is formed by an element 123 which is pivotally mounted on the seat part 11 about a third pivot axis S3 and which in the present case has a stop link 116 and a holding element 112. The holding element 112 protrudes from the stop link 116 and is guided in a guide 103 of the base 10. The holding element 112 and the counter-stop 110B are firmly connected to one another.

The stop 121B of the pivot lever 120A is included in the stop link 116. The stop link 116 has a kink. In the present case, the stop link 116 forms the counter-stop 110B.

3A shows the position of use. 3B shows a first intermediate position on the way to the advanced position, whereby the stop 121 B of the pivot lever 120A slides along a wall of the stop link 116 and thereby sets the element 123 in a pivoting movement about the third pivot axis S3. The holding element 112 is guided in the guide 103, in this case initially in a straight line up to the in 3B position shown. This is followed by a section of the guide 103 on which the holding element 112 is inclined relative to the rectilinear section. Here, the stop 121B is inserted into a pocket formed by the stop link 116, as in 3C illustrated. The path P` that the holding element 112 travels is in 3A-3D illustrated.

In this position, the stop 121A abuts against a wall of the stop link 116 which serves as the counter-stop 110. As a result, a further pivoting movement of the pivoting lever 120B in the same direction takes the seat part 11 into the forward position 3D . A wall of the stop link 116 opposite the wall of the stop link 116 serving as the counter-stop 110 provides a stop contour 113C, which abuts against the stop 121B of the pivot lever 120B when the seat part 11 is raised further in this position. This prevents unwanted movement of the seat part 11 in a simple manner.

4A shows a further adjustment mechanism 12C, which is constructed similarly to the adjustment mechanism 12A explained above, so that only differences are described in detail below become. Instead of a pinion drive, the drive device 13B here has a linear drive, specifically a spindle drive, with a spindle 133 and a spindle nut 134 screwed onto the spindle 133. The spindle nut 134 is rotatably mounted on the base 10 by a motor 130. The spindle 133 has an open end and is mounted with the other end rotatable about a third pivot axis S3 (but non-rotatable about its own axis) on the second arm A2 of the pivot lever 120C.

A locking element 135A is firmly connected to the spindle 133, which according to the in 4B shown intermediate position slides along a stop contour 113A on the seat part 11. For this purpose, the locking element has a circular arc-shaped contour. So can in the in 4C shown forward position, an unwanted pivoting movement of the seat part 11 relative to the pivot lever 120C can be prevented. This means that in the forward position of the vehicle seat 1, a rotation of the seat part 11 relative to the pivot lever 120C is blocked in one direction by the stop 121A resting on the counter-stop 110A of the seat part 11 and in the opposite direction of rotation by the locking element 135A resting on the stop contour 113A.

5A-5C show a further adjustment mechanism 12D, which is constructed similarly to the adjustment mechanism 12C explained above, so that only differences will be described in detail below. The right part of the spindle 133 is not shown for illustration purposes only.

Here, a backdrop 114 is firmly provided on the seat part 11. A locking element 135B, which slides along in the link 114, is firmly connected to the spindle 133. In the position of use according to 5A The locking element 135B is located at one end of the link 114. In the intermediate position according to 5B The locking element 135B is located at a bend between two arms of the link 114. In the forward position according to 5C the locking element 135B is arranged at another end of the link 114, in such a way that a rotation of the seat part 11 about the second pivot axis S2 strikes the locking element 135B on a wall of the link 114 (here vertically) serving as a stop contour 113B. From the intermediate position and up to the forward position, the pivot lever 120D rests with its stop 121A on the counter-stop 110A of the seat part 11.

Reference symbol list

1

Vehicle seat

10

Base

100

Locking recording

101

seat-side rail

102

bottom rail

103

guide

11

Seat part

110A; 110B

Counter stop

111

Locking element

112

Holding element

113A-113C

stop contour

114

Backdrop

115

End area

116

Scene of the attack

12A-12D

Adjustment mechanism

120A-120D

Swing lever

121A; 121B

attack

122

Feather

123

element

13A, 13B

Drive device

130

engine

131

pinion

132

gear

133

spindle

134

spindle nut

135A; 135B

Locking element

14

backrest

2

vehicle floor

A1, A2

poor

P; P'

path

S1-S3

Pivot axis

QUOTES INCLUDED IN THE DESCRIPTION

This list of 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.

Cited patent literature

• EP 1397269 B1 [0004]

Claims (16)

Vehicle seat (1), comprising: - a base (10), - a seat part (11) and - an adjustment mechanism (12A-12D), via which the seat part (11) is supported on the base (10) and by means of which the vehicle seat (1) can be transferred from a position of use into a position displaced forward relative thereto, wherein the adjustment mechanism (12A-12D) comprises a pivot lever (120A-120D) which is pivotably mounted on the base (10) about a first pivot axis (S1) and pivotably mounted on the seat part (10) about a second pivot axis (S2), characterized in that a stop (121A; 121B) is provided on the pivot lever (120A-120D), which is designed to abut against a counter stop (110A; 110B) of the pivot lever (120A-120D) during a pivoting movement of the pivot lever (120A-120D) relative to the seat part (11). seat part (11). Vehicle seat (1). Claim 1 , characterized in that the stop (121A; 121B) of the pivoting lever (120A-120D) takes the counter-stop (110A; 110B) of the seat part (11) with it during a further pivoting movement of the pivoting lever (120A-120D) relative to the seat part (11). that the seat part (11) is set in a pivoting movement about the first pivot axis (S1). Vehicle seat (1). Claim 1 or 2 , characterized in that the seat part (11) has a locking element (111), which cooperates with a counter-locking element in the position of use of the vehicle seat (1), in particular is held in a locking receptacle (100) of the base (10). Vehicle seat (1) after Claim 3 , characterized in that the locking element (111) is moved out of the locking receptacle (100) of the base (10) when the vehicle seat (1) is displaced from the position of use into the forward-displaced position. Vehicle seat (1). Claim 3 or 4 , characterized in that when the vehicle seat (1) is moved from the position of use to the advanced position, the locking element (111) describes a path (P) which has a first section and a second section which is shaped differently compared to the first section. Vehicle seat (1) according to one of the preceding claims, characterized in that the pivot lever (120A-120D) has a first arm (A1) which extends from the first pivot axis (S1) to the second pivot axis (S2), and a second Arm (A2), which extends from the second pivot axis (S2) and has the stop (121; 121B). Vehicle seat (1) according to one of the preceding claims, characterized by a drive device (13A; 13B) for rotating the pivot lever (120A-120D) about the first pivot axis (S1). Vehicle seat (1). Claim 7 , characterized in that the drive device (13A) comprises a pinion (131) rotatably mounted on the base (10), which meshes with a gear (132) firmly connected to the pivot lever (120A; 120B). Vehicle seat (1) after Claim 7 , characterized in that the drive device (13B) comprises a linear drive, which in particular has a spindle (133) with a spindle nut (134) engaging therewith or a rack. Vehicle seat (1) after Claim 9 , characterized in that the spindle (133) or the rack is connected in a rotationally fixed manner to a locking element (135A; 135B) which is designed to slide along a stop contour (113A, 113B) of the seat part (11). Vehicle seat (1). Claim 10 , characterized in that in the forward position of the vehicle seat (1), a rotation of the seat part (11) relative to the pivot lever (120B-120D) in a direction of rotation through the stop (121A; 121B) resting on the counter-stop (110A) of the seat part (11). ) and is blocked in the opposite direction of rotation by the locking element (135A; 135B) resting on the stop contour (113A; 113B). Vehicle seat (1). Claim 10 or 11 , characterized in that the stop contour (113B) is formed by a link (114). Vehicle seat (1) according to one of the preceding claims, characterized in that a holding element (112) pivotably mounted on the seat part (11) is guided through a guide (103) of the base (10). Vehicle seat (1). Claim 13 , characterized in that the holding element (112) and the counter-stop (110B) are firmly connected to one another. Vehicle seat (1) according to one of the Claims 1 until 13 , characterized in that the Counter stop (110A) is firmly provided on the seat part (11). Vehicle seat (1) according to one of the preceding claims, characterized in that the counter-stop (110B) is formed by a stop link (116).

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