DE102020000778A1 - Adjusting device for a seat and vehicle seat system with an adjusting device - Google Patents

Abstract

The invention relates to an adjusting device (16) for a seat (10), by means of which the seat (10) can be pivoted between at least two positions (12, 14), with several articulated joint elements ( 28), which can be aligned relative to one another by means of a spindle device (30), whereby the seat (10) is adjustable between the at least two positions (12, 14), with at least two joint elements (28) adjustable by means of the spindle device (30) having a toggle lever (36) provide.

Description

The invention relates to an adjusting device for a seat according to the preamble of patent claim 1 and to a vehicle seat system with an adjusting device.

From the DE 10 2018 000 317 A1 a method for adjusting a motor vehicle seat of a motor vehicle in a zero gravity position is known. The zero gravity position can also be referred to as the zero gravity position. When the motor vehicle seat is arranged in the zero gravity position, a person lying on the motor vehicle seat can assume a corresponding zero gravity position. The zero gravity position is particularly muscle-relaxing and, above all, relieves pressure on the spine. In the zero gravity position, there can be a uniform, gravity-related pressure distribution over several contact surfaces on which the vehicle occupant rests on the vehicle seat. This uniform distribution of the force of gravity enables a particularly extensive relief of the spinal column of the vehicle occupant and thus a particularly low-stress lying position of the vehicle occupant. This enables back health, in particular of intervertebral discs, body structures surrounding the joints, muscles and tissue. It is provided here that at least one seat cushion and a backrest of the vehicle seat are aligned relative to one another for the adjustment of the motor vehicle seat.

the CN 110013414 A discloses a massage chair which is adjustable by means of a spindle device in order to enable a zero gravity position to be assumed.

The object of the present invention is to create an adjustment device for a seat and a vehicle seat system with an adjustment device which enable a seat, in particular a vehicle seat, to be moved particularly easily from its position of use to a weightless position.

This object is achieved according to the invention by an adjusting device for a seat having the features of patent claim 1 and by a vehicle seat system with an adjusting device having the features of patent claim 4. Advantageous configurations with expedient developments of the invention are specified in the respective dependent claims and in the following description.

The invention relates to an adjusting device for a seat, by means of which the seat can be pivoted between at least two positions. The seat is in particular a vehicle seat which is adjustable between a position of use and a position of rest. In the position of use, the vehicle occupant sitting on the vehicle seat, in particular the driver of the vehicle having the vehicle seat, can control the vehicle. In the rest position, the vehicle occupant sitting on the vehicle seat, in particular the driver, can relax. The adjustment device comprises a plurality of articulated joint elements which are connected to one another in an articulated manner and which can be connected to the vehicle seat in an articulated manner and which can be aligned relative to one another by means of a spindle device. By aligning the joint elements relative to one another, in particular by pivoting the joint elements about respective joint axes predetermined by the articulated connections of the joint elements, the seat can be adjusted between the at least two positions, in particular the at least one use position and the rest position. In order to be able to adjust the seat in a particularly space-saving manner, it is provided according to the invention that at least two joint elements adjustable by means of the spindle device provide a toggle lever. In the case of the toggle lever, a large stroke with a particularly low tensile or compressive force is implemented in a small stroke with a large force, or vice versa. The toggle lever is therefore a force multiplier. In the case of the toggle lever, a transmission ratio between the force applied to the resulting force or from the primary stroke to the secondary stroke shifts continuously during a movement. The position of the seat can thus be adjusted particularly precisely by means of the toggle lever, the lever path to be covered being particularly small. As a result, the adjusting device can be designed to be particularly space-saving.

The rest position can be, for example, a weightless position, which can also be referred to as a so-called zero gravity position. When the seat is arranged in the zero gravity position, a vehicle occupant arranged on the seat can assume a zero gravity position. The zero gravity position enables a particularly high level of comfort for the vehicle occupant who is on the seat.

The invention further relates to a vehicle seat system with a vehicle seat and with an adjusting device, as has already been described in connection with the adjusting device according to the invention for the seat. The vehicle seat is thus the seat. The adjusting device is connected in an articulated manner to the vehicle seat via at least one articulation element via an articulation point. This articulation point defines a pivot axis about which the vehicle seat can be pivoted. In particular, the The pivot point is assigned to a support area for legs of the vehicle occupant on the vehicle seat, in particular for a knee of the vehicle occupant on the vehicle seat. This support area assigned to the knees of the vehicle occupant is a knee support area of the vehicle seat on which the vehicle occupant places his or her knees. With the arrangement of the articulation point in a length of the vehicle seat providing the knee support area, it can be achieved that the knee support area is at least substantially at the same height in every position of the vehicle seat, in particular the rest position and in at least one of the use positions. To adjust the vehicle seat from at least one position of use to the rest position, the vehicle seat can thus be lowered by means of the adjusting device in a length area of the vehicle seat assigned to a lumbar area of the vehicle occupant. The lowering into the longitudinal section of the vehicle seat assigned to the lumbar area while maintaining a height of the knee support area of the vehicle seat enables a particularly space-saving adjustment of the vehicle seat from the at least one position of use to the rest position.

Further advantages, features and details of the invention emerge from the following description of preferred exemplary embodiments and on the basis of the drawings. The features and combinations of features mentioned above in the description as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the combination specified, but also in other combinations or on their own, without the scope of the Invention to leave.

• 1 ein Verfahrensschema zum Verstellen eines Fahrzeugsitzes mittels einer Spindeleinrichtung von einer Gebrauchsstellung in eine Schwerelosstellung;
• 2 ein Verfahrensschema zum Verstellen des Fahrzeugsitzes mittels einer Verstelleinrichtung von der Gebrauchsstellung in die Schwerelosstellung, wobei die Verstelleinrichtung mehrere gelenkig mit dem Fahrzeugsitz verbundene Gelenkelemente umfasst, welche mittels einer Spindeleinrichtung relativ zueinander ausrichtbar sind, wobei wenigstens zwei mittels der Spindeleinrichtung verstellbare Gelenkelemente einen Kniehebel bereitstellen, wobei mittels der Spindeleinrichtung durch Wegdrücken der Gelenkelemente von einem Antrieb der Spindeleinrichtung der Kniehebel verstellt wird, wodurch der Fahrzeugsitz von der Gebrauchsstellung in die Ruhestellung verstellt wird; und
• 3 ein Verfahrensschema zum Verstellen des Fahrzeugsitzes von der Gebrauchsstellung in die Ruhestellung, wobei mittels der Verstelleinrichtung über die Spindeleinrichtung die den Kniehebel bereitstellenden Gelenkelemente zu dem Antrieb der Spindeleinrichtung herangezogen werden, wodurch der Fahrzeugsitz von der Gebrauchsstellung in die Ruhestellung verstellt wird.

It shows:

• 1 a process scheme for adjusting a vehicle seat by means of a spindle device from a position of use to a weightless position;
• 2 a process scheme for adjusting the vehicle seat by means of an adjusting device from the position of use to the weightless position, the adjusting device comprising a plurality of articulated joint elements connected to the vehicle seat, which can be aligned relative to one another by means of a spindle device, at least two joint elements adjustable by means of the spindle device providing a toggle lever, whereby the toggle lever is adjusted by means of the spindle device by pushing the joint elements away from a drive of the spindle device, whereby the vehicle seat is moved from the position of use to the rest position; and
• 3 a procedural scheme for adjusting the vehicle seat from the position of use to the rest position, the joint elements providing the toggle lever being used to drive the spindle device by means of the adjusting device via the spindle device, whereby the vehicle seat is adjusted from the position of use to the rest position.

Elements with the same function are provided with the same reference symbols in the figures.

In the 1 until 3 are vehicle seats as the respective seats 10 shown. The vehicle seats 10 can in particular be arranged in a vehicle interior of a motor vehicle. On the vehicle seats 10 vehicle occupants can sit in the vehicle. In order to provide a particularly high level of comfort for the vehicle occupants, the respective vehicle seats are 10 between at least one position of use 12th and a rest position 14th adjustable. At rest 14th In the present case, it is a weightless position, which can also be referred to as a so-called zero-gravity position. When arranging the vehicle seat 10 in the zero gravity position, one can sit on the vehicle seat 10 seated vehicle occupants be arranged in a zero gravity position. A zero gravity position is particularly easy on the back and enables a particularly high level of comfort for the vehicle occupant.

To the vehicle seat 10 between the at least one use position 12th and the rest position 14th to be able to understand is an adjustment device 16 intended. The adjustment device 16 is about several, present two articulation points 18th articulated with the vehicle seat 10 connected. Around at least one of the pivot points 18th is the vehicle seat 10 pivotable when adjusting the vehicle seat 10 of the at least one position of use 12th in the rest position 14th . For this purpose, at least one of the articulation points 18th a pivot axis 20th provide to which the vehicle seat 10 when adjusting from the at least one position of use 12th in the rest position 14th is pivoted.

The vehicle seat 10 in the present case includes a calf pad 22nd , a seat cushion 24 as well as a seat back 26th . When adjusting the vehicle seat 10 of the at least one position of use 12th in the rest position 14th will be the calf pad 22nd , the seat cushion 24 as well as the seat back 26th around the pivot axis 20th pivoted. Here the articulation point 18th , which is the pivot axis 20th defined, as shown in the figures, on the underside of the seat cushion 24 issue. Here are all the articulation points 18th the adjustment device 16 on the seat cushion 24 held.

The adjustment device 16 in the present case comprises several joint elements 28 which are articulated together. About the articulation points 18th are the joint elements 28 articulated with the vehicle seat 10 , especially the seat cushion 24 , connected.

The adjustment device 16 also includes a spindle device 30th with a spindle drive 32 and a spindle 34 , by means of which the joint elements 28 are adjustable in their orientation relative to each other, whereby the vehicle seat 10 of the at least one position of use 12th in the rest position 14th is adjustable. By means of the spindle drive 32 is the spindle 34 rotatable about its central axis. About rotating the spindle 34 are at least two joint elements 28 adjustable in their orientation relative to each other, whereby the vehicle seat 10 between the at least one use position 12th and the rest position 14th is adjustable. The spindle drive 32 can be operated manually or electrically, whereby the spindle device 30th can be driven manually or electrically. The spindle drive 32 can be designed as a hand knob or as an electric motor.

In order to achieve a particularly large adjustment movement of the vehicle seat with a particularly small adjustment path 10 To be able to enable, it is provided that at least two by means of the spindle device 30th adjustable joint elements 28 a knee lever 36 provide. This knee lever 36 is in 2 and 3 shown. To by means of the spindle device 30th that of the joint elements 28 provided knee lever 36 Understanding is a storage console 38 for the spindle 34 provided in which the spindle 34 is stored. The storage console 38 in the present case has an opening through which the spindle 34 is inserted through. Inside the opening of the storage console 38 is the spindle 34 manageable. In particular is the spindle 34 while adjusting the vehicle seat 10 of the at least one position of use 12th in the rest position 14th inside the opening of the storage console 38 manageable.

For adjusting the knee lever 36 is by means of the spindle device 30th an adjustable joint 40 , over which two joint elements 28 are connected to each other, movable. The adjustable joint 40 is used to adjust the vehicle seat 10 of the at least one position of use 12th in the rest position 14th by driving the spindle 34 by means of the spindle drive 32 along a longitudinal direction of the spindle 34 emotional. At the in 2 embodiment shown of the adjusting device 16 is used to adjust the vehicle seat 10 of the at least one position of use 12th in the rest position 14th the adjustable joint 40 along the spindle 34 from the spindle drive 32 moved away. At the in 3 embodiment shown, which in comparison to the in 2 embodiment shown due to the arrangement of the bearing bracket 38 below the vehicle seat 10 is designed to save space, the adjustable joint 40 when adjusting the vehicle seat 10 of the at least one position of use 12th in the rest position 14th along the spindle 34 to the spindle drive 32 moved there. When arranging the vehicle seat 10 in the rest position 14th are the knee levers 36 providing joint elements 28 which via the adjustable joint 40 are hinged together, buckled compared to the arrangement of these joint elements 28 relative to each other in the at least one position of use 12th of the vehicle seat 10 .

The adjustment device described 16 for the vehicle seat 10 as well as the described vehicle seat system with the vehicle seat 10 and the adjustment device 16 is based on the knowledge that, due to the possibility of fully automated driving and high comfort requirements, a so-called zero-gravity seating position is the focus of a seat development. Due to the complexity and space requirements, implementation while complying with conventional seat functions is difficult and can often only be achieved with solitary constructions, in particular due to issues relating to kinetosis or submarining, which means slipping under a seat belt.

The adjustment device described 16 enables a comparatively particularly simple kinematics and enables a driven adjustment of the vehicle seat 10 from a normal driving position to a zero gravity position, in this case the rest position 14th .

The adjustment device 16 comprises a multi-link seat structure. The multi-link seat structure can, as in 1 is shown, from two movable links and a manual or electric spindle device 30th , which acts on a handlebar include. In addition, the multi-link structure, as in 2 and 3 is shown, the toggle lever 36 from three movable links and the spindle device 30th which have a manual or electric spindle drive 32 includes. The spindle device acts here 30th on two of the handlebars, which are the joint elements 28 acts. By operating the spindle device 30th becomes a rear area of the vehicle seat in the direction of travel 10 , in this case the seat cushion 24 and the seat back 26th , lowered when adjusting the vehicle seat 10 of the at least one position of use 12th in the rest position 14th , causing a rotation of the entire vehicle seat 10 into the zero gravity position and thus the weightless position. Instead of the spindle device 30th can the joint elements 28 be pivoted relative to one another with another linear bearing system with a detent and / or fixing option, such as a seat rail-like system.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102018000317 A1 [0002]
• CN 110013414 A [0003]

Claims (4)

Adjusting device (16) for a seat (10), by means of which the seat (10) can be pivoted between at least two positions (12, 14), with several joint elements (28) which are articulated to one another and can be articulated to the seat (10), which can be aligned relative to one another by means of a spindle device (30), whereby the seat (10) is adjustable between the at least two positions (12, 14), characterized in that at least two joint elements (28) adjustable by means of the spindle device (30) have a toggle lever ( 36) provide. Adjusting device (16) according to Claim 1 , characterized in that the seat (10) can be adjusted into a weightless position by means of the adjusting device (16). Adjusting device (16) according to Claim 1 or 2 , characterized in that the spindle device (30) comprises a manual or an electric spindle drive (32). Vehicle seat system, with a vehicle seat (10), with an adjusting device (16) according to one of the preceding claims, wherein the adjusting device (16) is articulated to the vehicle seat (10) via at least one articulation element (28) via an articulation point (18), which defines a pivot axis (20) about which the vehicle seat (10) can be pivoted.

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