Vehicle seat

Abstract

The proposed idea relates to a vehicle seat having a backrest (10R) rigidly coupled with a seating portion (10S) such that a pivoting movement of the backrest (10R) about a rear pivoting axis (A) is always accompanied by a corresponding pivoting movement of the seating portion (10S), the inclination of the backrest (10R) being adjustable via the rear pivoting axis. A seat pan adjustment device (20) is provided via which the seat pan portion (2) can be pivoted relative to the seating portion (10S) about a seating portion pivoting axis (B).

Description

Technical Field

[0001] The proposed solution involves a vehicle seat in which the seating portion and the backrest are rigidly connected to each other. Background Technology

[0002] Vehicle seats in which the seating section and backrest are rigidly connected are known in various ways in practice. Here, for example, for cost and weight reasons, a rigid connection is established between the backrest and the seating section, thus eliminating the need for fittings between the seating section and the backrest. In this case, while the backrest tilt may still be adjustable, it is always accompanied by pivoting of the seating section. Therefore, the tilt of the seating section, and especially the tilt of the seating surface defined at the seating section, can no longer be adjusted independently of the backrest tilt. While this eliminates some extremely complex structural components, particularly those sensitive to impact, around the locking or rotating fittings used for independent adjustment between the seating section and the backrest, this comes at the cost of significant drawbacks in comfort. Summary of the Invention

[0003] In this context, the proposed solution aims to provide an improved, particularly accessory-free, vehicle seat.

[0004] This task is solved using the vehicle seat of claim 1.

[0005] The proposed vehicle seat includes a seating portion, on which an adjustable seat basin portion is arranged to define the positioning of the seating surface on the vehicle seat. Furthermore, the vehicle seat includes a backrest, which is rigidly connected to the seating portion, such that the pivoting movement of the backrest about a rear pivot axis relative to the seat's longitudinal axis always accompanies the corresponding pivoting movement of the seating portion (about the same rear pivot axis), via which the tilt of the backrest can be adjusted. Additionally, a seat basin adjustment device is provided, via which the seat basin portion can pivot relative to the seating portion about the seating portion's pivot axis.

[0006] By means of a seat basin that can pivot about an additional seating section pivot axis, even in a vehicle seat where the backrest and seating section are rigidly connected to each other, the seating position can be adjusted more specifically and comfortably for the seat user.

[0007] For example, the pivot axis of the seating portion is positioned at the rear third of the seating portion relative to the extension of the vehicle seat along the longitudinal axis of the seat. The pivot axis of the seating portion for the seat basin and the rear pivot axis for the backrest can, in principle, coincide. In one implementation variation, the pivot axis of the seating portion is spaced apart from the rear pivot axis so that the thigh support area for the seat user can be more specifically adjusted by adjusting the positioning of the seat basin relative to the backrest.

[0008] In principle, the pivot axis of the seating portion of the seat can coincide with, include, or be set only slightly offset from the H-point, a pre-defined point on the buttocks of the vehicle seat.

[0009] Through electronic and / or mechanical linkage, the seat basin adjustment device can be driven by the pivoting movement of the backrest to compensate for the adjustment of the seat basin relative to the pivoting seating portion. The purpose of this compensatory adjustment of the seat basin is to (partially or completely) maintain the position occupied by the seating surface before the backrest begins its pivoting movement. Therefore, in such a vehicle seat, for example, the adjustment of the seat basin relative to the seating portion can be achieved by the pivoting movement of the backrest, such that while the rigidly connected seating portion also pivots to the same degree during the pivoting movement of the backrest, the seat basin is immediately, i.e., reversed during the pivoting movement of the seating portion, so that the orientation of the seating surface remains substantially unchanged in space for the seat user. Therefore, for the seat user, only the backrest tilt appears to change, while the reverse-driven seat basin adjustment device ensures that the angle of the seat user's thigh resting on the seating surface relative to the horizontal line or relative to the vehicle floor where the vehicle seat is located is substantially the same or exactly the same.

[0010] Therefore, the linkage between the seat basin adjustment device and the vehicle seat's backrest tilt adjustment device can be configured such that the seat basin adjustment device is driven to perform compensatory movement via the seat basin portion, so as to (at least partially, especially most or even completely) counteract the associated pivoting of the seating portion (caused by the rigid connection between the backrest and the seating portion). In particular, this can be configured such that the seating surface of the vehicle seat remains essentially or exactly in its original (i.e., before the backrest begins its pivoting movement) position relative to the horizontal line. Here, the linkage between the seat basin adjustment device and the backrest tilt adjustment device can be configured such that the seat basin portion is adjusted relative to the seating portion to the degree of pivoting of the backrest (together with the seating portion) about the rearward pivot axis. Therefore, by adjusting the seat basin portion to the degree of pivoting of the seating portion relative to the backrest about the rearward pivot axis, the positioning of the vehicle seat's seating surface, predetermined by the seat basin portion, is changed.

[0011] For example, a device for adjusting the tilt of the backrest can be configured to achieve so-called rocker-type adjustment kinematics. To this end, the device may, for example, include a double-hinged adjuster, i.e., an adjustment mechanism having an adjustment portion adjustable about at least two hinge axes, for transmitting adjustment force and for generating the set adjustment movement.

[0012] The rear pivot axis for backrest pivoting can be understood here as a pivot axis located in the transition area between the backrest and the seating portion relative to the longitudinal direction of the seat. By pivoting about this (rear) pivot axis, the tilt of the backrest can be adjusted to pre-determine different usage positions for the vehicle seat user. If the tilt of the seat basin relative to the seating portion can be adjusted via a seat basin adjustment device, the seat basin can pivot about another pivot axis. Thus, the pivot axis for the seat basin is arranged, for example, before the rear pivot axis for adjusting the backrest tilt relative to the longitudinal direction of the seat, and therefore forms a forward pivot axis.

[0013] When the backrest pivots about the rear pivot axis in the first pivot direction, the seat basin can be adjusted in the first adjustment direction via the seat basin adjustment device. Conversely, when the backrest pivots about the rear pivot axis in the opposite second pivot direction, the seat basin can be adjusted in the second adjustment direction via the seat basin adjustment device. Therefore, when the backrest pivots forward in the first pivot direction, for example, the seat basin is raised and tilted towards the backrest via the seat basin adjustment device. Conversely, when the backrest pivots rearward, the seat basin is lowered and tilted away from the backrest via the seat basin adjustment device.

[0014] In principle, the linkage between the seat adjustment mechanism and the vehicle seat's backrest tilt adjustment mechanism can also be mechanical. However, to save weight and cost, one implementation variation includes a seat adjustment mechanism comprising a drive motor for externally operated adjustment of the seat portion, and an electronic linkage via control electronics. Therefore, through the motor-driven seat adjustment mechanism and the electronic linkage between the operation of the seat adjustment mechanism and the backrest tilt adjustment, compensatory movement can be achieved relatively simply and with extreme comfort for the seat user.

[0015] The proposed solution enables compensatory movement of the seat basin portion, which relies on backrest adjustment. This eliminates the need for accessories on the vehicle seat that allow the backrest to be adjusted relative to the seating area, without requiring the user to sacrifice certain comfort features. Accessory-free vehicle seats offer significant cost advantages, typically require less structural space, and are easier to assemble.

[0016] For example, a vehicle seat includes at least one frame portion that forms part of the backrest frame and part of the seat substructure. Therefore, while in the proposed solution the backrest and seating portion could also be implemented as separate components or structural parts and rigidly fixed together only, thus eliminating relative movement between the backrest and seating portion, additional assembly and cost advantages can be achieved by implementing at least a portion of the backrest frame and part of the seat substructure of the seating portion as a single piece on the frame portion, particularly regarding simple, possible one-piece implementations for the seating portion foam and backrest foam and / or trim of the vehicle seat. In an improved embodiment, the vehicle seat includes a one-piece seat frame that forms the backrest frame and the seat substructure of the adjustable seat basin portion of the seating portion.

[0017] In principle, the seat substructure may also have a frame structure for example to optimize weight. Alternatively or additionally, the backrest frame and / or seat substructure are implemented as a tubular frame. Furthermore, in one implementation variant, the frame portion may be constructed of fiber composite materials.

[0018] In the proposed solution, the seat basin of the vehicle seat can be constructed as a full basin or a half basin. This is secondary to the advantages that can be achieved by utilizing the proposed solution.

[0019] In one embodiment, the vehicle seat may additionally include a seat height adjustment device. This seat height adjustment device may be linked electronically and / or mechanically to a seat adjustment device and / or a device for adjusting the backrest tilt of the vehicle seat. By utilizing, for example, a motor-operated seat height adjustment device, through additional linkage with control electronics, the seating position for the seat occupant can be adjusted more precisely and can be better matched to the needs of the seat occupant. For example, the seat height adjustment device is implemented with a three-hinged adjuster.

[0020] In one implementation variant, the proposed vehicle seat is implemented as a reclining seat and / or as a seatbelt-integrated seat.

[0021] The proposed solution also includes vehicles with at least one implementation variant of the proposed vehicle seat. Attached Figure Description

[0022] The accompanying figures exemplify possible implementation variations of the proposed solution.

[0023] in:

[0024] Figure 1AA side view of an embodiment of the proposed vehicle seat is shown in a first (use) position. The vehicle seat has a seat frame that integrates a backrest frame for the backrest with a seat substructure for the seating portion, on which a seat basin portion is arranged in an adjustable tilt manner.

[0025] Figure 1B Show Figure 1A The vehicle seat, wherein the seat frame is in a second (use) position with rearward pivoting, and the seat basin is lowered;

[0026] Figure 2A-2B Shown in reverse order of adjustment Figure 1A and 1B Vehicle seats. Detailed Implementation

[0027] Figure 1A A vehicle seat 1 with a frame portion in the form of a seat frame 10 is shown. The seat frame 10 currently integrates a backrest frame 10R for the vehicle seat 1 and a lower seat structure for the seating portion 10S of the vehicle seat 1. Therefore, currently, the seat frame 10 is implemented as a single piece and constructed with the backrest 10R and the seating portion 10S. Thus, if the backrest 10R of the vehicle seat 1 is to change its inclination relative to the horizontal line by pivoting the backrest 10R about a rear pivot axis A, the entire seat frame 10 must pivot about the rear pivot axis A and perform a rocker-like movement, with the seating portion 10S also pivoting with this rocker-like movement. To enable seat users to adjust the backrest 10R of the vehicle seat 1 without significantly altering the seating surface defined for the user's thighs and buttocks at the vehicle seat 1, the vehicle seat 1 is equipped with a frame portion adjuster 100 for adjusting the backrest 10R, which is linked to the seat adjustment device 20. The hinged adjuster 100 can be a so-called rocker-type adjuster for realizing rocker-type adjustment kinematics. In particular, the hinged adjuster 100 can be configured as a double-hinged adjuster.

[0028] The seat basin portion 2, which is supported on the seating portion 10S, can be adjusted via the seat basin adjustment device 20 in a manner that allows it to pivot about the forward seating portion pivot axis B (positioned relative to the longitudinal axis of the seat and the rear pivot axis A). The forward seating portion pivot axis B for the seat basin portion 2 is spaced apart from the front of the seat and is located at the rear third of the seating portion 10S relative to the longitudinal axis of the vehicle seat 1. This allows the seat basin adjustment device 20 to raise or lower the front end of the seat basin portion 2 relative to the seating portion 10S, thereby changing the inclination of the seat basin portion 2 relative to the seating portion 10S accordingly. By arranging the seat cushion of the vehicle seat 1 on or at least supporting it, the seat basin portion 2 ultimately defines the positioning of the seating surface on the vehicle seat 1.

[0029] The seat adjustment device 2 allows the inclination of the seating surface relative to the horizontal line and the backrest R to be adjusted via its motor drive (i.e., without relying on adjusting the inclination of the backrest 10R). Furthermore, in the illustrated embodiment, an electronic linkage is provided between the seat adjustment device 20 and the frame section adjuster 100 via control electronics 4, or a linkage is provided between the respective motor drives of the seat adjustment device 20 and the frame section adjuster 100.

[0030] Therefore, when only the tilt of the backrest 10R needs to be adjusted and the motor drive of the control frame part adjuster 100 is used for this purpose, the motor drive of the seat adjustment device 20 is automatically driven via the control electronics 4 for compensatory movement. For example, when the backrest 10R is tilted from... Figure 1A In the case of the initial positioning with rearward pivoting as shown, the seat adjustment device 20 is driven to lower the seat portion 2 and thus pivot the front end of the seat portion 2 toward the seating portion 10S, which pivots in conjunction with the backrest 10R. Therefore, the seat portion 2 pivots toward the seating portion 10S in the opposite direction via the seat adjustment device 20 about the forward seating portion pivot axis B to the extent that the backrest 10R pivots rearward about the rearward pivot axis A.

[0031] In this regard, according to Figure 1A and 1B The diagram shows that, based on Figure 1AStarting from the initial positioning (in which the backrest 10R extends substantially along the extending plane R at an angle α to the extending plane S of the seating surface of the vehicle seat 1), the backrest 1B can tilt backward to a limited degree, while the seating surface for the seat user does not tilt backward to the same degree. More precisely, the lowering of the seat portion 2 counteracts the pivoting movement of the backrest 10R, thereby changing the orientation of the backrest 10R relative to the seating surface, and thus, although the seating portion 10S is pivoted together with the backrest 10R, the orientation of the thighs on the seating surface of the vehicle seat 1 for the seat user can remain unchanged. Therefore, according to Figure 1B As shown in the diagram, the extended plane R of the backrest 10R forms a larger angle β (β>α) with the extended plane S of the seating surface of the vehicle seat 1, because the seat basin portion 2 has been lowered accordingly.

[0032] Therefore, the control electronics 4 relies on the adjustment of the seat frame 10, and especially the backrest 10R, around the rear pivot axis A, driven by the frame section adjuster 100, to control the seat basin adjustment device 20. Thus, the control electronics 4 regulates undesirable effects (in terms of seating comfort) accompanying the pivoting of the seating section 10S, and when the inclination of the backrest 10R relative to the seating surface of the vehicle seat 1 needs to be changed, it drives the seat basin section 2 via the seat basin adjustment device 20 for counteracting adjustment movement. Here, the seat user or other operator who initiates the adjustment of the vehicle seat 1, for example, only operates the operating switch for adjusting the backrest 10R. The control electronics 4 will automatically assume the corresponding counteracting effect made by the motor-driven adjustment of the seat basin section 2.

[0033] Such as combination Figure 2A and Figure 2B As explained with respect to the reverse adjustment sequence, when the backrest 10R pivots forward, a corresponding compensating movement is also provided via the seat portion 2, controlled by the control electronics 4. The seat portion 2 is pivoted about the forward seating pivot axis B of the seating portion 10S towards the backrest 10R to such an extent that the backrest 10R (along with the seating portion 10S) should be raised from its position according to… Figure 2A The backward-flipping positioning is adjusted forward to a more upright positioning.

[0034] Combination Figures 1A to 2BIt can also be seen that a seat height adjuster 3 can be additionally provided on the vehicle seat 1. The seat height of the vehicle seat 1 relative to the vehicle floor can be adjusted via the seat height adjuster 3. For this purpose, the seat height adjuster 3 is connected to the seat frame 10, which includes the seating portion 10S and the backrest 10R and also supports the seat basin portion 2. Therefore, if the seat frame 10 is moved via the seat height adjuster 3, the seat height of the vehicle seat 1 will change as a whole. For example, the seat height adjuster 3 is implemented as a three-hinged adjuster.

[0035] Figures 1A to 2B The vehicle seat 1 is implemented without accessories. Therefore, there are no accessories between the backrest 10R and the seating portion 10S for changing the relative position between them. Thus, any possible transmission parts or transmission shafts for transmitting adjustment forces between two accessories located on different longitudinal sides of the seat can also be eliminated. However, through the electronic linkage between the frame section adjuster 100 and the seat basin adjuster 20, the assembly advantages achieved here do not come with a loss of comfort or a reduction in the possibility for the seat user to adjust their seating position on the vehicle seat 1.

[0036] List of reference numerals

[0037] 1. Vehicle Seats

[0038] 10 Seating Frame (Frame Section)

[0039] 100 Frame Part Adjuster

[0040] 10R backrest

[0041] 10S Riding Section

[0042] 2. Seat Basin

[0043] 20. Seat adjustment device

[0044] 3. Seat height adjuster

[0045] 4. Control electronic devices

[0046] A Rear Pivot Axis

[0047] B. Riding on a partial pivot axis

[0048] R - Extended plane of the backrest

[0049] S is the extended plane of the seating surface.

[0050] α and β angles

Claims

1. A vehicle seat, the vehicle seat having -The seating section (10S) has a seat basin section (2) arranged in an adjustable manner to define the positioning of the seating surface of the vehicle seat (1). - A backrest (10R) rigidly connected to the seating portion (10S), such that the pivoting movement of the backrest (10R) about the rear pivot axis (A) always accompanies the corresponding pivoting movement of the seating portion (10S), and the tilt of the backrest (10R) can be adjusted via the rear pivot axis. Its features are, The vehicle seat (1) includes a seat adjustment device (20) via which the seat portion (2) can pivot relative to the seating portion (10S) about the seating portion pivot axis (B). The seat adjustment device (20) includes at least one drive motor for externally operated adjustment of the seat portion (2) and control electronics (4) for controlling the motor-driven adjustment of the seat portion (2) by the at least one drive motor. The control electronics (4) are configured to drive the at least one drive motor during the pivoting movement of the backrest (10R) for compensatory adjustment of the seat basin portion (2) relative to the pivoting seating portion (10S), so that the seating surface is substantially or exactly maintained in its original position relative to the horizontal line.

2. The vehicle seat according to claim 1, characterized in that, The pivot axis (B) of the seating portion is located at the rear third of the seating portion (10S) about the vehicle seat (1) along the longitudinal axis of the seat.

3. The vehicle seat according to claim 1, characterized in that, The pivot axis (B) of the seating section is spaced apart from the pivot axis (A) of the rear section.

4. The vehicle seat according to claim 1, characterized in that, The control electronics (4) are configured such that the degree of pivoting of the backrest (10R) about the rear pivot axis (A) relative to the seating portion (10S) adjusts the seat portion (2).

5. The vehicle seat according to claim 1, characterized in that, When the backrest (10R) pivots about the rear pivot axis (A) in the first pivot direction, the seat basin portion (2) can be adjusted in the first adjustment direction via the seat basin adjustment device (20). When the backrest (10R) pivots about the rear pivot axis (A) in the opposite second pivot direction, the seat basin portion can be adjusted in the second adjustment direction via the seat basin adjustment device.

6. The vehicle seat according to claim 1, characterized in that, The inclination of the seat portion (2) relative to the seating portion (10S) can be adjusted via the seat adjustment device (20).

7. The vehicle seat according to claim 1, characterized in that, The vehicle seat (1) includes at least one frame portion (10) that forms part of the backrest frame of the backrest (10R) and part of the seat substructure of the seating portion (10S).

8. The vehicle seat according to claim 7, characterized in that, The vehicle seat (1) includes a one-piece seat frame (10) that forms the lower seat structure of the backrest frame and the seating portion (10S) that carries the seat basin portion (2).

9. The vehicle seat according to claim 1, characterized in that, The vehicle seat (1) is implemented without accessories.

10. The vehicle seat according to claim 1, characterized in that, The vehicle seat (1) includes a seat height adjustment device (3).

11. The vehicle seat according to claim 10, characterized in that, The seat height adjustment device (3) is electronically and / or mechanically linked to the seat adjustment device (20) and / or to the device (100) for adjusting the tilt of the backrest (10R).

12. The vehicle seat according to claim 1, characterized in that, The vehicle seat (1) is implemented as a reclining seat and / or a seatbelt integrated seat.

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