CN118317887A - Vehicle seat with asymmetrical kinematic - Google Patents

Abstract

The proposed solution relates to a vehicle seat (1A-1E) comprising: a seating portion (10) defining a seating area (100) having a seat width (SB) and including a first lateral portion (101A) and a second lateral portion (101B) spaced apart from the first lateral portion along the seat width (SB); a base (11); and a kinematic arrangement (12A-12E) by which the seating portion (10) is supported on the base (11) in a manner movable relative to the base (11), and which comprises a first kinematic assembly (G1) arranged on the first lateral portion (101A) and a second kinematic assembly (G2) arranged on the second lateral portion (101B). The first kinematic assembly (G1) and the second kinematic assembly (G2) are structurally different, so that in at least one position of the seat part (10) relative to the base (11), forces (F) which are introduced symmetrically with respect to the kinematic assemblies (G1, G2) into the seat part (10) are introduced asymmetrically into the base (11) via the kinematic assemblies (G1, G2).

Description

Vehicle seat with asymmetrical kinematic

Technical Field

The proposed solution relates to a vehicle seat according to the preamble of claim 1.

Prior Art

Such a vehicle seat comprises a seating portion defining a seating area for seating having a seat width and comprising a first lateral portion and a second lateral portion spaced apart from the first lateral portion along the seat width, a base on which the seating portion is supported in a movable manner relative to the base by the kinematic arrangement, and the kinematic arrangement comprises a first kinematic assembly arranged on the first lateral portion and a second kinematic assembly arranged on the second lateral portion.

Such a vehicle seat is described in DE 10 2009 022 568 A1. The two sides of the known vehicle seat, each having one of the kinematic assemblies, are designed here symmetrically.

In known vehicle seats, it is often necessary to manufacture the components of the seat part, the kinematic arrangement and the base with high precision, so that no locking or difficult-to-move adjustment occurs when adjusting the seat part relative to the base by the kinematic arrangement.

DE 10 2016 212 891 A1 describes a vehicle seat with exactly three connecting devices, by means of which the vehicle seat is connected to a floor structure component. The rear connection device is here arranged substantially centrally in the transverse direction of the seat, i.e. in the direction of the seat width. Thereby, overdetermination can be prevented, and thereby smooth adjustment can be achieved even when the manufacturing accuracy is low. However, this solution requires structural space that is not available in many applications.

Disclosure of Invention

The object is to provide an improved vehicle seat.

This object is achieved by a vehicle seat having the features of claim 1.

It is therefore provided that the first kinematic assembly is structurally different from the second kinematic assembly such that in at least one position of the seat part relative to the base, forces which are introduced symmetrically with respect to the kinematic assembly into the seat part are led asymmetrically out into the base via the kinematic assembly.

This is based on the surprising recognition that by means of such a design of the kinematic means overdetermination can be counteracted, so that even with low manufacturing accuracy of the components, difficult adjustment or even locking can be avoided. The advantage of this solution is thus that it is easier to lock the seating part synchronously on the base, for example by locking the kinematic assembly synchronously on the base, since manufacturing tolerances can be compensated for by an increase in the elasticity of the kinematic arrangement. This enables an improved vehicle seat which can be produced particularly simply and can be used reliably.

The kinematic means for example comprise a plurality of pivoting levers. The seating portion may be movably supported on the base by a pivot rod. The pivot rod allows a strong and simultaneously loadable docking of the sitting portion on the base.

Optionally, the first kinematic assembly is structurally different from the second kinematic assembly in that the first kinematic assembly has a greater number of pivot rods than the second kinematic assembly. This is a solution which can be realized particularly simply from a constructional point of view.

For example, the seating portion with the first kinematic assembly is supported on the base via just two pivot rods. Alternatively or additionally, the seating portion with the second kinematic assembly may be supported on the base via exactly one pivot rod. Thus, in at least one position of the sitting portion relative to the base, the sitting portion is supported on the base, for example via exactly three pivot rods, whereby these three pivot rods carry the total weight of the sitting portion. Thus, a particularly smooth adjustment can be achieved with a simple structure.

One of the kinematic assemblies has, for example, a front pivot rod and a rear pivot rod, and/or wherein the (other) kinematic assembly has only a front pivot rod or only a rear pivot rod. The front pivot rod or the rear pivot rod of the other kinematic assembly may be symmetrically arranged with respect to the corresponding front pivot rod or rear pivot rod of the one kinematic assembly. Thus, a particularly large number of generic parts can be used.

One of the kinematic assemblies may have a pivot rod connected to the seating portion or base via a shaft translatably mounted on the seating portion or base. It may furthermore be provided that all remaining pivot rods of the kinematic arrangement are pivotably connected to the sitting portion and the base at a pivot hinge, wherein the pivot hinge is fixed against translation relative to the sitting portion or the base. When introducing a force into the sitting portion, the pivot rod can be displaced with the translationally movable shaft, so that the force is thus led out asymmetrically. This solution can be implemented in a particularly simple manner on existing vehicle seats.

Furthermore, a shaft mounted in a translationally movable manner on the sitting portion or the base may be guided in a longitudinally extending chute. This allows a well-defined guidance.

In one embodiment, one of the kinematic assemblies comprises a pivot rod which has a greater flexibility, in particular a significantly greater flexibility, than the remaining pivot rods of the kinematic arrangement. Such a solution can be realized particularly simply.

Alternatively, one of the kinematic assemblies includes a pivot rod made of a different material than the remaining pivot rods of the kinematic device, e.g., a more flexible material than the other pivot rods. Alternatively or additionally, one pivot rod is produced, for example, with a smaller material thickness than the remaining pivot rods.

It can generally be provided that the pivot lever of the first kinematic assembly is fixedly connected to the pivot lever of the second kinematic assembly via a synchronization link. Thereby enabling a uniform and symmetrical adjustment of the sitting portion relative to the base.

Alternatively, the seating portion may be transferred (e.g. by unlocking at least one lock described later) by means of kinematic means from a seating use position to a relatively forwardly displaced easy entry position (wherein the front side of the vehicle seat is described by the end of the seating portion facing away from the backrest). In the easy entry position and/or in an intermediate position between the easy entry position and the ridable use position, forces symmetrically introduced into the riding section with respect to the kinematic assembly are asymmetrically guided out through the kinematic assembly and the base.

The vehicle seat may comprise at least one lock for locking the seating portion to the base in the seating use position. It can be provided here that the seat part is supported on the base in the seat-able use position via the lock and/or in the region of the lock.

The (at least one) lock is for example associated with the first kinematic assembly and the second kinematic assembly is for example associated with a further lock for locking the sitting portion to the base in the sitting use position. This enables a secure locking.

The lateral parts are fixedly connected to each other, for example by at least one transverse carrier, for example at least one transverse tube. The lateral portion and the one or more lateral carriers may together form a seat frame.

The base can comprise a longitudinal adjustment device, which comprises, for example, two pairs of lower rails and upper rails guided thereon in a longitudinally displaceable manner in the longitudinal displacement direction. The longitudinal movement direction is oriented perpendicular to the seat width.

Drawings

The figures show by way of example possible embodiments of the proposed solution, wherein. Here:

figures 1A and 1B show a vehicle seat having a seating portion movable relative to a base by a kinematic arrangement, wherein the kinematic arrangement comprises a first kinematic assembly having two pivot rods and a second kinematic assembly having only one pivot rod, and wherein the seating portion has a transverse carrier and carries a backrest structural assembly;

FIGS. 2A and 2B illustrate a vehicle seat having a seating portion movable relative to a base by a kinematic according to FIGS. 1A and 1B, wherein the seating portion carries a backrest structure assembly equipped with a transverse carrier;

FIG. 3 illustrates a vehicle seat having a seating portion movable relative to a base by a kinematic arrangement, wherein the kinematic arrangement includes a first kinematic assembly having a pivot rod movably supported;

FIG. 4 illustrates a vehicle seat having a seating portion movable relative to a base by a kinematic arrangement, wherein the kinematic arrangement includes a first kinematic assembly having a pivot rod made of a more flexible material than the other pivot rods of the kinematic arrangement;

FIG. 5 shows an additional vehicle seat having a seating portion movable relative to a base by kinematic means; and

Fig. 6 shows the seating portion according to fig. 1A in a forwardly pivoted easy entry position.

Detailed Description

Fig. 1A and 1B show a vehicle seat 1A having a seating portion 10, a base 11, a kinematic 12A, a backrest structure assembly 13 and two locks 14.

The seating portion 10 defines a seating area 100 that is seating with a seat width SB. The seating portion 10 includes a first lateral portion 101A and a second lateral portion 101B spaced apart from the first lateral portion along a seat width SB. The lateral portions 101A, 101B are fixedly connected to each other by a rear transverse carrier 102A and a front transverse carrier 102B. The lateral portions 101A, 101B and the lateral carriers 102A, 102B together form a seat frame. The cushion carrier extends between the transverse carriers 102A, 102B, on which a cushion of the vehicle seat 1A can be supported.

The vehicle floor can generally be used as the base 11, the base 11 currently comprising a longitudinal adjustment device comprising a first counterpart and a second counterpart, each of which is formed by a lower rail 111 and an upper rail 110 guided thereon longitudinally movable in a longitudinal movement direction. The longitudinal displacement direction is oriented perpendicularly to the seat width SB.

The seating portion 10 is supported on the base 11 by the kinematic means 12A in a movable manner with respect to the base 11. The kinematic means 12A enable movement of the seating portion 10 relative to the base 11. Currently, the kinematic 12A guides the seating portion 10 as it is adjusted between a seating use position shown in fig. 1A and a relatively forward-moving position (which is also referred to herein as an easy entry position). In the seating use position, the seat user can sit on the vehicle seat 1A. In the easy entry position of the seating portion 10 relative to the base 11, which is schematically shown in fig. 6, the vehicle seat 1A is enlarged to the entrance of a row of seats of the vehicle that are arranged behind the vehicle seat 1A.

Here, the kinematic arrangement 12A comprises a first kinematic component G1 arranged on the first lateral portion 101A and a second kinematic component G2 arranged on the second lateral portion 101B. The first kinematic assembly G1 and the second kinematic assembly G2 differ in structure here such that in at least one position of the seat part 10 relative to the base 11, forces F introduced symmetrically (e.g. centrally) with respect to the kinematic assemblies G1, G2 into the seat part 10 are introduced asymmetrically via the kinematic assemblies G1, G2 into the base 11.

Wherein each kinematic assembly G1, G2 includes at least one pivot rod 120A-120C. The seating portion 10 is movably supported on the base 11 by a pivot lever. Wherein each pivot rod 120A-120C is pivotally mounted on one of the lateral portions 101A, 101B and pivotally mounted on the base 11, i.e. on the upper rail 110 of the base 11.

Currently, the first kinematic assembly G1 has a greater number of pivot rods 120A, 120B than the second kinematic assembly G2, i.e., the first kinematic assembly G1 has exactly two pivot rods 120A, 120B, while the second kinematic assembly G2 has exactly one pivot rod 120C. Thus, the kinematic arrangement 12A includes exactly three pivot rods 120A-120C in total. Here, the first kinematic assembly G1 has a front pivot lever 120A and a rear pivot lever 120B, which are arranged in sequence along the longitudinal movement direction. The second kinematic assembly G2 has only the front pivot rod 120C symmetrically arranged relative to the front pivot rod of the first kinematic assembly G1, but no rear pivot rod. Alternatively, the second kinematic assembly G2 may have only the rear pivot rod and no front pivot rod.

The first pivot lever 120A, i.e. the front pivot lever 120B of the first kinematic assembly G1, is pivotally hinged on the upper rail 110 of one rail counterpart at the rotary hinge D1 and pivotally hinged on the first lateral portion 101A at the further rotary hinge D2. The second pivot lever 120B, i.e. the rear pivot lever 120B of the first kinematic assembly G1, is pivotally hinged at the rotary hinge D3 to the upper rail 110 of the same rail counterpart and is in turn pivotally hinged at the further rotary hinge D4 to the first lateral portion 101A. The first and second pivot rods 120A, 120B form a four-piece hinge mechanism with the base 11 and the first lateral portion 101A.

The third pivot lever 120C, i.e. the front pivot lever 120C of the second kinematic assembly G2, is pivotally hinged at the rotary hinge D5 to the upper rail 110 of the further rail counterpart and at the further rotary hinge D6 to the second lateral portion 101B.

The two front pivot rods 120A, 120C are fixedly connected to each other by a synchronization link 121. The two front pivot rods 120A, 120C are thus synchronized in view of their pivot positions and with respect to the base 11 and with respect to the seating portion 10. The two front pivot rods 120A, 120C are connected to one another in a rotationally fixed manner.

The backrest construction assembly 13 (which can also be referred to simply as backrest) comprises at least one backrest part, here two backrest parts 130A, 130B (respectively for the seat user), which are pivotably connected to the bracket 131 by means of fittings. The bracket 131 can be mounted on the lateral parts 101A, 101B and in the mounted state according to fig. 1A.

Because the backrest structure assembly 13 is mounted on the seating portion 10, the backrest structure assembly 13 follows between a ridable use position and an easy entry position when adjusting the seating portion 10. Optionally, upon forward tipping, the fitting is maneuvered into the easy entry position such that the backrest portions 130A, 130B may additionally pivot forward.

One of the locks 14 is arranged on each of the two lateral portions 101A, 101B. Each lock 14 may be locked in a ridable use position. If the respective lock 14 is locked, it locks the respective lateral portion 101A, 101B with respect to the base 11. The locks 14 each have a hook which can be inserted in a locking manner into an insertion section on the respective upper rail 110.

The lock 14 arranged on the first lateral portion 101A is arranged behind the two pivot rods 120A, 120B of the first kinematic assembly G1. The rear pivot rod 120B of the first kinematic assembly G1 is disposed between the front pivot rod 120A and the lock 14. The lock 14 arranged on the second lateral portion 101B is arranged behind the pivot lever 120C of the second kinematic assembly G2.

In the sitting position of use, the sitting portion 10 is located on both sides in the region of the lock 14 at contact areas K on the respective upper rail 110 of the base 11, respectively, so that gravity can be introduced into the base via the contact areas K. In the easy-entry position of the seat part 10 relative to the base 11, which is schematically shown in fig. 6, the forces F introduced centrally into the seat part 10 with respect to the kinematic assemblies G1, G2 are led asymmetrically out by the kinematic assemblies G1, G2 and the base (11), i.e. in the first kinematic assembly G1 by the two pivot rods 120A, 120B and in the second kinematic assembly G2 by the pivot rod 120C only, since the pivot rods of the second kinematic assembly G2 are fewer than those of the first kinematic assembly G1. The force F is derived via the first kinematic component G1 differently than via the second kinematic component G2.

Fig. 2A and 2B show a vehicle seat 1B comprising a kinematic 12B which is constructed identically to the kinematic 12A of the vehicle seat according to fig. 1A and 1B. Currently, the rear transverse carrier 102A is however fastened to the bracket 132 of the backrest structure assembly 13, to which the fittings of the backrest parts 130A, 130B are also fastened. Two outer ones of the brackets 132 are mounted on the two lateral portions 101A, 101B at the time of manufacture. In this case, relatively large assembly tolerances may occur. Due to the structurally different design of the first kinematic assembly G1 compared to the second kinematic assembly G2, such tolerances do not lead to a locking during adjustment between the sitting position of use and the easy entry position.

Fig. 3 shows a vehicle seat 1C, which is constructed similarly to the vehicle seats 1A, 1B according to fig. 1A to 2B, so that only differences will be discussed later.

The vehicle seat 1C includes a kinematic 12C having four pivot rods 120A-120D. The first kinematic assembly G1 of the kinematic arrangement 12C comprises two pivoting bars 120A, 120B and the second kinematic assembly G2 of the kinematic arrangement 12C comprises two further pivoting bars 120C, 120D.

The pivot rods 120A, 120B of the first kinematic assembly G1 are symmetrically arranged and oriented with the pivot rods 120, 120D of the second kinematic assembly G2. The pivot rods 120A, 120B of the first kinematic assembly G1 and the pivot rods 120C, 120D of the second kinematic assembly G2 are arranged and mounted similarly to the pivot rods 120A, 120B of the first kinematic assembly G1 of the vehicle seat according to fig. 1A and 1B, respectively. However, one of the pivot rods 120A-120D, the rear pivot rod 120B of the current first kinematic assembly G1, is movably supported on one side.

The rear pivot rod 120B of the first kinematic assembly G1 forms a movable rotary hinge D3 with a shaft 122 that is embedded in a runner 113 fastened on the upper rail 110.

In the vehicle seat 1C according to fig. 3, the first kinematic assembly G1 is therefore structurally different from the second kinematic assembly G2 in that the rear pivot lever 120B of the first kinematic assembly G1 is rotatably mounted on the base 11, while the remaining pivot levers 120A, 120C, 120D are mounted exclusively by means of pivot bearings. In this way, in the easy entry position of the seating part 10 relative to the base 11, the force F introduced into the seating part 10 symmetrically with respect to the kinematic assemblies G1, G2 is led out asymmetrically via the kinematic assemblies G1, G2 and the base 11.

Fig. 4 shows a vehicle seat 1D which is constructed similarly to the vehicle seats 1A-1C according to fig. 1A to 3, so that only differences will be discussed later.

The vehicle seat 1D includes a kinematic 12D having four pivot rods 120A-120D. The first kinematic assembly G1 of the kinematic arrangement 12D comprises two pivoting bars 120A, 120B and the second kinematic assembly G2 of the kinematic arrangement 12D comprises two further pivoting bars 120C, 120D. The pivot rods 120A-120D are arranged according to fig. 3, wherein however all pivot rods 120A-120D are only connected to the base 11 and the sitting portion 10 by means of a swivel hinge and thus only can perform a rotational movement relative thereto and not a translational movement.

In the vehicle seat 1D according to fig. 4, the first kinematic assembly G1 and the second kinematic assembly G2 differ in terms of structure, i.e. the rear pivot rod 120D of the second kinematic assembly G2 is made of a different material (e.g. plastic, composite material or one or more sheet metal materials) than its Yu Shu pivot rods 120A-120C (which are made of, for example, steel, in particular, integrally). Specifically, the rear pivot rod 120D of the second kinematic assembly G2 is made of a more flexible material than the remaining pivot rods 120A-120C. Thus, in the easy entry position, the force F symmetrically introduced into the seating portion 10 about the kinematic assemblies G1, G2 is asymmetrically introduced via the kinematic assemblies G1, G2 and the base 11. In particular, overdetermined can be compensated in the radial direction.

The vehicle seats 1A to 1D described above are rear seats. However, the described kinematic arrangement may also be used for a vehicle seat of the first row of seats, for example for a driver seat or a co-driver seat.

Thus, fig. 5 shows a seating portion of a vehicle seat 1E in the form of a driver seat with a kinematic 12E. Here, the left rear pivot lever 120B is guided in a rotationally movable manner in a slide slot 113 at the base 11, while all remaining rotary joints of the pivot levers 120A-120D are fixed with respect to the translation. For better understanding, the components of the kinematic device 12E are shown in schematic form on the drawings. The drive unit 15 fixed to the sitting portion 10 is configured for adjusting an adjusting member (here a spindle) along an adjusting axis in order to achieve a height adjustment of the sitting portion relative to the base.

In the described vehicle seat 1A-1E, manufacturing tolerances can be compensated for and stresses between components can be reduced and thus friction losses can be reduced. It is also possible to simplify the manufacture and design and use fewer parts.

List of reference numerals

1A-1E vehicle seat

10. Seating portion

100. Seating area

101A, 101B lateral portions

102A, 102B transverse carriers

103. Holding part

11. Base seat

110. Upper guide rail

111. Lower guide rail

113. Sliding chute

12A-12E kinematic device

120A-120D pivot rod

121. Synchronous connecting rod

122. Shaft

13. Backrest structural assembly

130A, 130B backrest portion

131. Support frame

132. Support frame

14. Lock with locking mechanism

15. Driving unit

D1-D8 rotary hinge

Force F

G1, G2 kinematic assembly

K contact area

SB seat width

Claims (15)

1. Vehicle seat (1A-1E), comprising:

A seating portion (10) defining a seating area (100) having a seat width (SB) and comprising a first lateral portion (101A) and a second lateral portion (101B) spaced apart from the first lateral portion along the seat width (SB),

-A base (11), and

-Kinematic means (12A-12E) by which the seating portion (10) is supported on the base (11) in a movable manner with respect to the base (11) and which comprise a first kinematic assembly (G1) arranged on the first lateral portion (101A) and a second kinematic assembly (G2) arranged on the second lateral portion (101B),

It is characterized in that the method comprises the steps of,

The first kinematic assembly (G1) is structurally different from the second kinematic assembly (G2) such that in at least one position of the seating portion (10) relative to the base (11), forces (F) symmetrically introduced into the seating portion (10) with respect to the kinematic assemblies (G1, G2) are asymmetrically introduced into the base (11) via the kinematic assemblies (G1, G2).

2. Vehicle seat (1A-1E) according to claim 1, characterized in that the kinematic arrangement (12) comprises a plurality of pivot rods (120A-120D) by means of which the sitting portion (10) is movably supported on the base (11).

3. The vehicle seat (1A-1B) according to claim 2, characterized in that the first kinematic assembly (G1) has a greater number of pivot rods (120A, 120B) than the second kinematic assembly (G2).

4. A vehicle seat (1A-1B) according to claim 2 or 3, characterized in that the first kinematic assembly (G1) has exactly two pivot rods (120A, 120B) and the second kinematic assembly (G2) has exactly one pivot rod (120C).

5. The vehicle seat (1A-1B) according to any one of claims 2 to 4, wherein one kinematic assembly (G1) has front and rear pivot rods (120A, 120B) and wherein the other kinematic assembly (G2) has only a front pivot rod or only a rear pivot rod (120C).

6. Vehicle seat (1C) according to any of claims 2 to 5, characterized in that one of the kinematic assemblies (G2) has a pivot rod (120B) connected to the sitting portion (10) or the base (11) via a shaft (122) mounted in a translatably movable manner on the sitting portion or the base, while the remaining pivot rods (120A, 120C, 120D) of the kinematic means (12C) are pivotably connected to the sitting portion (10) and the base (11) at a swivel hinge (D1, D2, D4-D8) which is fixed against translation.

7. Vehicle seat (1C) according to claim 6, characterized in that a shaft (122) mounted in a translationally movable manner on the sitting portion (10) or the base (11) is guided in a longitudinally extending slide groove (113).

8. The vehicle seat (1D) according to any one of claims 2 to 7, characterized in that one of the kinematic assemblies (G2) comprises a pivot rod (120D) having a greater flexibility than the remaining pivot rods (120A-120C) of the kinematic arrangement (12D).

9. The vehicle seat (1D) according to any one of claims 2 to 8, characterized in that one of the kinematic assemblies (G2) comprises a pivot rod (120D) made of a different material than the remaining pivot rods (120A-120C) of the kinematic arrangement (12D).

10. The vehicle seat (1A-1D) according to any one of claims 2 to 9, characterized in that the pivot rod (120A) of the first kinematic assembly (G1) is fixedly connected with the pivot rod (120C) of the second kinematic assembly (G2) via a synchronization link (121).

11. Vehicle seat (1A-1D) according to any of the preceding claims, characterized in that the sitting portion (10) is transferable from a sitting use position to a relatively forwardly displaced easy entry position by means of the kinematic means (12A-12D).

12. Vehicle seat (1A-1D) according to claim 11, characterized by a lock (14) for locking the sitting portion (10) on the base (11) in the sitting use position.

13. Vehicle seat (1A-1D) according to claim 11 or 12, characterized in that the lock (14) is assigned to the first kinematic assembly (G1) and the second kinematic assembly (G2) is assigned a further lock (14) for locking the sitting portion (10) on the base (11) in the sitting use position.

14. Vehicle seat (1A-1E) according to any of the preceding claims, characterized in that the lateral parts (101A, 101B) are fixedly connected to each other by at least one transverse carrier (102A, 102B).

15. Vehicle seat (1A-1E) according to any of the preceding claims, characterized in that the base (11) comprises a longitudinal adjustment device comprising two counterparts each consisting of a lower rail (111) and an upper rail (110) guided thereon in a longitudinally movable manner.