Seat frame for a seat arrangement of a vehicle

Abstract

Seat frame for a seat arrangement of a vehicle having a seat substructure, a seat surface supporting structure, an attachment structure and a backrest supporting structure. The seat substructure is arranged on a vehicle floor and the seat surface supporting structure fastens a seat surface element of the seat arrangement thereto. The seat surface supporting structure is movable on the seat substructure and/or on the attachment structure. The backrest supporting structure fastens a backrest element of the seat arrangement thereto. The backrest supporting structure is pivotably movable on the seat substructure. The backrest supporting structure is pivotable out of a first use position of the seat frame into a second use position of the seat frame. In the second use position, the backrest supporting structure acts on the seat surface supporting structure and forces the seat surface supporting structure out of the first use position into the second use position.

Claims

1. A seat frame for a seat arrangement of a vehicle, wherein the seat frame comprises a seat substructure, a seat surface supporting structure, an attachment structure, a backrest supporting structure and a latching element on a backrest strut of the backrest supporting structure, wherein the seat substructure is configured to be arranged on a vehicle floor of a vehicle, wherein the seat surface supporting structure is configured to fasten a seat surface element of the seat arrangement thereto, wherein the seat surface supporting structure is movably articulated on the seat substructure and/or movably articulated on the attachment structure, wherein the backrest supporting structure is configured to fasten a backrest element of the seat arrangement thereto, wherein the backrest supporting structure is articulated on the seat substructure in a pivotably movable manner and the latching element is releasably latched to the seat substructure in a seating position, wherein the backrest supporting structure is pivotable out of a first use position of the seat frame into a second use position of the seat frame, wherein in the second use position the backrest supporting structure acts on the seat surface supporting structure and forces the seat surface supporting structure out of the first use position into the second use position.

2. The seat frame for a seat arrangement of a vehicle as claimed in claim 1, wherein the attachment structure further comprises a bearing surface for the seat surface supporting structure, wherein the backrest strut of the backrest supporting structure extends in a first use position transversely to the bearing surface of the attachment structure from a first strut end to a second strut end, wherein the backrest strut is articulated in the region of the bearing surface in a pivotably movable manner on the seat substructure, wherein the first strut end is present in a region below the bearing surface and the second strut end is present in a region above the bearing surface.

3. The seat frame for a seat arrangement of a vehicle as claimed in claim 1, wherein the attachment structure further comprises a recess into which the seat surface supporting structure engages and/or the seat substructure has a recess into which the seat surface supporting structure may engage.

4. The seat frame for a seat arrangement of a vehicle as claimed in claim 1, wherein the seat surface supporting structure in the first use position is mounted on the seat substructure, such that a seat surface element arranged on the seat surface supporting structure has a seat surface inclination relative to a horizontal.

5. The seat frame for a seat arrangement of a vehicle as claimed in claim 1, wherein the seat surface supporting structure in the second use position is mounted on the seat substructure and on the backrest supporting structure, such that a seat surface of the seat surface element arranged on the seat surface supporting structure forms a plane with the horizontal.

6. The seat frame for a seat arrangement of a vehicle as claimed in claim 3, wherein the backrest strut of the backrest supporting structure engages in a second use position into the recess of the attachment structure.

7. The seat frame for a seat arrangement of a vehicle as claimed in claim 1, wherein the backrest supporting structure in the second use position engages into a cavity of the seat substructure and/or into a cavity of the attachment structure.

8. The seat frame for a seat arrangement of a vehicle as claimed in claim 1, wherein the backrest supporting structure has two backrest struts, wherein the two backrest struts are connected together via a hinge.

9. The seat frame for a seat arrangement of a vehicle as claimed in claim 8, wherein the two backrest struts in the first use position enclose an angle α of less than 90°.

10. The seat frame for a seat arrangement of a vehicle as claimed in claim 8, wherein the two backrest struts in the second use position are oriented parallel to one another.

11. The seat frame for a seat arrangement of a vehicle as claimed in claim 1, further comprises a retaining element which limits a pivoting movement of the backrest strut.

12. The seat frame for a seat arrangement of a vehicle as claimed in claim 1, wherein the backrest supporting structure is configured in the manner of a frame.

13. A seat arrangement of a vehicle comprising a seat frame as claimed in claim 1.

14. A vehicle comprising a seat arrangement as claimed in claim 13.

15. The seat frame for a seat arrangement of a vehicle as claimed in claim 2, wherein the backrest strut in the second use position engages into a cavity of the seat substructure and/or into a cavity of the attachment structure.

16. The seat frame for a seat arrangement of a vehicle as claimed in claim 1, wherein the latching element is releasably latched to the seat substructure in the first use position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) A plurality of exemplary embodiments are described in more detail with reference to the following schematic drawings and by providing further details and advantages.

(2) FIGS. 1 to 3 show a side view of a first variant of a seat frame in different use positions;

(3) FIG. 4 shows a front view of a further variant of a seat frame with the arranged seat surface and backrest element;

(4) FIG. 5 shows a rear view of the seat frame according to FIG. 4;

(5) FIG. 6 shows a side view of the seat frame according to FIG. 4;

(6) FIGS. 7 and 8 show a side view of the seat frame according to FIG. 4, wherein in FIGS. 7 and 8 a schematic adjustment sequence of the seat frame from a first use position into a second use position is shown; and

(7) FIGS. 9 to 14 show a side view of the seat frame according to FIG. 4, wherein steps of the adjustment sequence according to FIGS. 7 and 8 are shown in the individual figures.

DETAILED DESCRIPTION OF THE INVENTION

(8) Embodiments of the seat frame variants described below are able to be combined together in any manner. An individual embodiment of a described seat frame variant may be combined with a further seat frame variant, even if such a combination is not described below. Hereinafter, for the sake of simplicity, reference numerals of the same or similar elements are used consistently for the different seat frame variants.

(9) A seat frame 1 according to the present invention with a seat substructure 2, a seat surface supporting structure 3, an attachment structure 4, and a backrest supporting structure 5 are shown schematically in FIGS. 1 to 3. A seat surface element 6 and/or a backrest element 7 are arranged on the seat surface supporting structure 3 and on the backrest supporting structure 5. In the embodiment according to FIGS. 1 to 3, the seat surface element 6 and the backrest element 7, for example, are connected together, for example, configured in one piece. The seat surface element 6 and the backrest element 7 are present, for example, in the form of a seat cushion. The seat surface element 6 and the backrest element 7 are configured, for example, as an integral seat cushion. The seat frame 1 forms together with the seat surface element 6 and the backrest element 7 a vehicle seat 8 according to the present invention.

(10) Due to the schematic view in FIGS. 1 to 3, a seat inclination of a seat surface of the seat surface element 6 in the first use position (FIGS. 1, 2) is not visible. Advantageously, however, a seat inclination is present.

(11) The seat substructure 2 comprises amongst other things an attachment member 9, two seat substructure supports 10, 11 and a support foot 12. The elements of the seat substructure 2 are configured, for example, in the manner of a strut, for example, as metal or steel struts. For example, an element is present as a metal tube, in particular, as a square tube.

(12) The attachment member 9 of the seat substructure 2 in the arranged state advantageously extends along the vehicle, in particular, parallel to a vehicle floor 13. The attachment member 9, for example, comprises connecting means 36, in order to connect the seat substructure 2 in a positionally fixed manner to the vehicle floor 13.

(13) The two seat substructure supports 10, 11 of the seat substructure 2 advantageously run at least approximately vertically and connect the attachment member 9 to the attachment structure 4. The support foot 12 is advantageously arranged so as to run obliquely between the seat substructure supports 10, 11. Advantageously, the seat substructure supports 10, 11 and the support foot 12 form a common support plane. The support plane in the arranged state of the seat frame 1 on the vehicle floor 13 is present so as to be oriented, for example, perpendicular to an extension plane of the vehicle floor 13 and/or a longitudinal extent of the attachment member 9. An extension direction of the support plane, for example, is present in the vertical direction.

(14) Advantageously, the seat substructure 2 comprises two, for example, four, front seat substructure supports 10 and two, for example, four, rear seat substructure supports 11 (FIGS. 4 to 6). The seat substructure supports 10, 11 are, for example, connected together by means of the attachment structure 4, viewed transversely to the seating direction S. It is also conceivable that the seat substructure supports 10, 11 are connected together by means of a transverse strut (not shown), in particular, in addition to the attachment structure 4.

(15) A first backrest strut 14 of the backrest supporting structure 5 advantageously is articulated in a pivotably movable manner, in particular, a rotatable manner, on the seat substructure 2. Advantageously, the first backrest strut 14 is mounted in a rotatably movable manner via a rotary bearing 15 on the seat substructure 2. Advantageously, viewed in the vertical extension, a first end 16 of the first backrest strut 14 terminates in a region of the attachment member 9 and a second end 17 of the first backrest strut 14 terminates in a head or shoulder region of the vehicle seat 8 which is formed by the seat frame 1.

(16) The seat substructure 2 further comprises a retaining member, for example, in the form of a belt strap 18. The belt strap 18 is advantageously connected by one end at the first end 16 of the first backrest strut 14 to the first backrest strut 14 and secured by a further end to the seat frame 1. By the belt strap 18 a pivoting movement of the first end 16 of the first backrest strut 14 is limited about a rotational axis of the rotary bearing 15 counter to a seating direction S, in particular, counter to a direction of travel F, of a vehicle on which the seat frame 1 is able to be arranged. As a result, in the event of a crash, the backrest is prevented from being folded down in the seating direction S and thus a user of the seat frame 1 is prevented from being jammed or squashed between the backrest element 7 and the seat surface element 6.

(17) Preferably, the backrest supporting structure 5 comprises a second backrest strut 19. The first and the second backrest strut 14, 19 are, for example, connected together in an articulated manner by means of a latching hinge 20. For example, the first backrest strut 14 at the second end 17 is connected in an articulated manner to a first end 21 of the second backrest strut 19. The latching hinge 20 is configured, for example, to be self-securing, for example self-latching, so that the two backrest struts 14, 19 are adjustable relative to one another at different angles α, in particular, latchable to one another. Advantageously, the longitudinal extensions of the first and the second backrest struts 14, 19 enclose with one another an angle α, wherein the two longitudinal extensions advantageously intersect at a pivot point of the latching hinge 20.

(18) A latching element 23 is configured at a second end 22 of the second backrest strut 19. In a first use position of the second backrest strut 19 according to FIGS. 1, 6, the second backrest strut 19 with the second end 22 is advantageously positioned on the seat substructure 2, for example, on the attachment structure 4 and/or the rear seat substructure support 11. Advantageously the latching element 23 in the first use position is releasably, in particular automatically, latched to the seat substructure 2. For example, the seat substructure 2 comprises a latching member 24 which is configured, for example, as an opening or a receiver to which the latching element 23 is able to be releasably locked. The latching element 23, for example, is movably arranged, in particular, preloaded by spring force, for example, in the form of a movable bolt or pin, at the second end 22 of the second backrest strut 19.

(19) Advantageously, the backrest supporting structure 5 comprises a plurality of first backrest struts 14, for example, just two or just three first backrest struts 14. It is also conceivable that the backrest supporting structure 5 comprises a plurality of second backrest struts 19, for example, specifically two or specifically three second backrest struts 19. The plurality of first and/or second backrest struts 14, 19 are advantageously connected together in the manner of a frame. For example, the first and/or second backrest struts 14, 19 are connected together by means of the backrest element 7. Advantageously, the backrest element 7 is configured in two parts, wherein a first part of the two-part backrest element 7 is able to be connected to the first backrest strut 14 and a second part of the two-part backrest element 7 is able to be connected to the second backrest strut 19.

(20) In FIGS. 1 to 3 (and/or FIGS. 9 to 14), an adjustment sequence of the seat frame 1, 37 from a first use position according to FIG. 1 (and/or FIG. 9) into a second use position according to FIG. 2 (and/or FIGS. 10 to 13) to a third use position according to FIG. 3 (and/or FIG. 14) is shown (see also the movement sequence corresponding to FIGS. 9 to 14). In the first use position according to FIG. 1, the seat frame 1 and, in particular, the backrest struts 14, 19 in a position locked by the latching element 23 are located on the seat frame 1. The first use position is also at the same time a seating position. In the second use position, a locking of the second backrest strut 19 to the seat frame 1 is released and the second backrest strut 19, for example, rotates relative to the first backrest strut 14 about the rotational axis of the latching hinge 20. As a result, an angle α between the first backrest strut 14 and the second backrest strut 19 is increased. By the release of the second backrest strut 19 from the locked position and the pivoting of the second backrest strut 19, a pivoting and/or rotational movement of the first backrest strut 14 about the axis of the rotary bearing 15 is released. In the side view of the seat frame 1, 37 according to FIGS. 1 to 3 (and/or FIGS. 9 to 14) a clockwise rotation of the first backrest strut 14 is possible, as a result. By pivoting the first backrest strut 14 and by further movement of the second backrest strut 19 relative to the first backrest strut 14, the third use position according to FIG. 3 (and/or FIG. 14) is reached. In FIG. 3 (and/or in FIGS. 10 to 14), the movement sequence into the third use position is indicated schematically. The third use position is at the same time a reclining position of the seat frame 1. In the third use position, a reclining surface consisting of a seat surface 25 of the seat surface element 6 and a backrest surface 26, 27 is present in the flattened state. The latching hinge 20 latches the two backrest struts 14, 19 together in the third use position, so that the longitudinal extensions of the backrest struts 14, 19 extend parallel to one another. Advantageously, the second backrest strut 19 forms in the reclining position a lengthening of the first backrest strut 14. In the reclining position, the two backrest struts 14, 19 are advantageously at an angle α of approximately 180° to one another. Advantageously, the plurality of backrest struts 14, 19 in the third use position form a reclining plane. The reclining plane is advantageously configured as a horizontal plane, so that the seat surface 25 and the backrest surfaces 26, 27 form a flat reclining surface.

(21) FIGS. 4 to 6 show a seat arrangement with a further variant of a seat frame 29 in the form of a vehicle seat bench 28. The vehicle seat bench 28 is similar in terms of basic elements to the previously described seat frame 1. The vehicle seat bench 29 comprises, for example, head restraints 30. The head restraints 30 are removably arranged on the vehicle seat bench 28. For example, the head restraints 30 may be plugged into corresponding receivers 31 of the vehicle seat bench 28 in the known manner in an upper region of the vehicle seat bench 28. The vehicle seat bench 28 further comprises, for example, a safety belt system 32 consisting of a belt retractor 33, a belt deflector 34, a belt 35 and a belt buckle (not shown). The belt retractor 33 is, for example, mounted on the second backrest strut 19.

(22) It is shown in FIG. 6 that in the first use position, the seating position, the seat surface 25 of the seat surface element 6 has an inclination relative to the vehicle floor 13 and/or relative to an extension plane of the attachment members 9.

(23) In FIGS. 7 and 8 and/or 9 to 14, a further variant of a seat frame 37 in the form of a vehicle seat 38 is shown. FIGS. 7 to 14 show in this case the seat frame 37 in different use positions.

(24) It may be derived from FIGS. 7 and 8 that before starting an adjustment movement of the backrest struts 14, 19 from the seating position into the reclining position, the head restraint 30 has to be removed from a working position at the upper end 17 of the first backrest strut 14, in order to be able to implement the adjustment movement of the backrest struts 14, 19. The head restraint 30 may be arranged and stored, for example, on a rear storage region 39 on the first backrest strut 14.

(25) A latching element 43 of the seat frame 37 of FIGS. 7 to 14 is configured to be U-shaped, in particular, in the manner of a clip. As a result, the latching element 43 is configured so as to be able to be clipped and/or suspended on an end region 44 of the attachment structure 4, whereby the first backrest strut 14 is able to be fixed in the seating position.

(26) In FIG. 8, it is also shown that the attachment structure 4 has a recess 40. The recess 40 is configured in the manner of a wedge. In the seating position, the seat surface element 6 bears against a bearing surface 41 of the recess 40, so that it has an inclination relative to the vehicle floor 13 and/or relative to an extension plane of the attachment members 9.

(27) In the reclining position (FIGS. 8 and 14) of the seat frame 37, the first backrest strut 14 acts on the seat surface supporting structure 3 and, in particular, on the seat surface element 6 and at the same time forces the seat surface element 6 out of the first use position (seating position) into the second use position (reclining position). In this case, the seat surface supporting structure 3, for example, is pivotably coupled in a front region 42 of the seat frame 37, in particular, movably in a front region of the attachment structure 4. Viewed in the seating direction, the front region of the attachment structure 4 is advantageously present opposite and spaced apart from the end region 44 of the attachment structure 4.

(28) For example, in the reclining position, the first backrest strut 14 engages from below into the recess 40, so that the first backrest strut 14 acts on a lower end of the seat surface element 6 and the seat surface element 6 rises at one end in the vertical direction. As a result, an inclination of the seat surface element 6 which is present in the seating position, in particular, the seat surface 25 of the seat surface element 6, is lifted relative to a horizontal plane and the seat surface 25 is located approximately in a horizontal plane and forms with the backrest surfaces 26, 27 of the backrest element 7 a planar, flat reclining surface.

LIST OF REFERENCE NUMERALS

(29) 1 Seat frame 2 Seat substructure 3 Seat surface supporting structure 4 Attachment structure 5 Backrest supporting structure 6 Seat surface element 7 Backrest element 8 Vehicle seat 9 Attachment member 10 Seat substructure support 11 Seat substructure support 12 Support foot 13 Vehicle floor 14 Backrest strut 15 Rotary bearing 16 End 17 End 18 Belt strap 19 Backrest strut 20 Latching hinge 21 End 22 End 23 Latching element 24 Latching member 25 Seat surface 26 Backrest surface 27 Backrest surface 28 Vehicle seat bench 29 Seat frame 30 Head restraint 31 Receivers 32 Safety belt system 33 Belt retractor 34 Belt deflector 35 Belt 36 Connecting means 37 Seat frame 38 Vehicle seat 39 Storage region 40 Recess 41 Bearing surface 42 Region 43 Latching element 44 End region