Vehicle seat, scissors-type stand with force transmission

• US 8,641,141 B2
• Filed: 01/23/2008
• Issued: 02/04/2014
• Est. Priority Date: 02/21/2007
• Status: Active Grant

• Current Assignee: Keiper GmbH & Company KG (Johnson Controls International plc)
• Original Assignee: Keiper GmbH & Company KG (Johnson Controls International plc)
• Inventors: Hassler, Klaus, Schweizer, Thorsten, Gundall, Thomas, Klein, Harald, Weber, Thomas, Nissen, Rdiger
• Primary Examiner(s): Dunn, David
• Assistant Examiner(s): Abraham, Tania
• Application Number:
  US12/527,951
• Publication Number:
  US 20100140991A1
• Time in Patent Office: 2,204 Days
• Field of Search: 297/344.12, 297/344.14, 297/344.15, 297/216.1, 297/312, 297/362, 297/216.19, 297/327, 297/328
• US Class Current: 297/216.19
• CPC Class Codes: B60N 2/0705 omega-shaped
• CPC Class Codes: B60N 2/162 Scissors-like structure
• CPC Class Codes: B60N 2/181 Rods
• CPC Class Codes: B60N 2/1839 pivoting about an axis located in an intermediate position
• CPC Class Codes: B60N 2/22 the back-rest being adjustable B60N2/2878 takes precedence
• CPC Class Codes: B60N 2/4221 due to impact coming from the front
• CPC Class Codes: B60N 2/508 Scissors-like structure

Abstract

A vehicle seat (1), in particular commercial vehicle seat, is provided with a framework, in particular scissors-type framework (3), a seat frame (10) which is articulated thereon via a pivot axis (B), and a backrest (20) which is attached to the seat frame (10) and by means of which a torque acts about the pivot axis (B) on the seat frame (10) in the event of a crash or misuse. The framework (3) has a first catch element (31) and the seat frame (10) has a second catch element (32) which normally do not interact. In the event of a crash or misuse, the catch elements approach each other and then interact creating a further path for the force flux.

Claims

1. A vehicle seat comprising:

a scissors-type stand comprising a bottom frame, a top frame arranged above said bottom frame and at least one pair of crossed rockers, wherein said top frame is adjustable in height over said bottom frame via said at least one pair of crossed rockers;

a seat frame coupled to the top frame via a pivot axis; and

a backrest attached to the seat frame, in the event of a crash or misuse, the backrest causing a torque to act on the seat frame, the stand having a first catch element and the seat frame having a second catch element, the first catch element and the second catch element being normally spaced apart from each other without interaction and, in the event of a crash or misuse, the first catch element and the second catch element approaching each other and then interacting and creating a path for force transmission from said seat frame to the stand, at least the first catch element comprising a catch hook with a double bent portion, or a bolt, wherein an elongated hole is formed in the material of the seat frame or of the stand, with the border region of the seat frame or of the stand, which border region borders the elongated hole, serving as the second catch element.

2. The vehicle seat as claimed in claim 1, further comprising a linear adjuster or a gearing having an inclination-adjusting fitting wherein the seat frame can be adjusted in its inclination relative to the stand by means of the linear adjuster or the gearing having the inclination-adjusting fitting.

3. The vehicle seat as claimed in claim 1, further comprising at least one triple-jointed element, wherein the seat frame is coupled directly to the stand and is connected in an articulated manner to the stand by means of the at least one triple jointed element.

4. The vehicle seat as claimed in claim 3, further comprising at least one inclination-adjusting fitting wherein the at least one inclination-adjusting fitting is provided in the triple jointed element, said inclination-adjusting fitting being effective between the seat frame or the stand and a link of the triple-jointed element.

5. The vehicle seat as claimed in claim 1, further comprising at least one backrest fitting wherein the backrest is attached pivotably by means of the at least one backrest fitting to the seat frame or to backrest adaptors fastened to the seat frame.

6. The vehicle seat as claimed in claim 5, further comprising at least one inclination-adjusting fitting wherein the inclination-adjusting fitting and/or the backrest fitting form a disk-shaped unit, in terms of structure, and/or in that the inclination-adjusting fitting and/or the backrest fitting is/are designed as a latching fitting or as a geared fitting, with a self-locking eccentric epicyclic gearing.

7. The vehicle seat as claimed in claim 1, wherein, in the event of a crash, the two catch elements additionally interact laterally with respect to the main direction of the force flux.

8. The vehicle seat as claimed in claim 1, wherein, in the event of a crash, at least one of the two catch elements interacts laterally with respect to the main direction of the force flux with the frame or stand assigned to the other catch element.

9. The vehicle seat as claimed in claim 1, wherein at least one of the two catch elements has a side-securing means which is effective laterally with respect to the main direction of the force flux.

10. The vehicle seat as claimed in claim 1, wherein the catch elements are spaced apart from the coupling point of the seat frame to the stand by the pivot axis being provided in the center of the seat frame or in the vicinity of the same in the longitudinal direction of the seat, and the catch elements being provided at the rear end of the seat frame and of the stand.

11. A commercial vehicle seat comprising:

a scissors-type stand;

a seat frame pivotably coupled to the scissors-type stand via a pivot axis; and

a backrest attached to the seat frame, in the event of a crash or misuse, the backrest causing a torque to act on the seat frame, the stand having a first catch element and the seat frame having a second catch element, the first catch element and the second catch element being normally spaced apart from each other without interaction and, in the event of a crash or misuse, the first catch element and the second catch element approaching each other and then interacting and creating a path for force transmission from the seat frame to the stand, wherein a backrest fitting forms a disk-shaped unit and said backrest fitting comprises a latching fitting or a geared fitting with a self-locking eccentric epicyclic gearing, at least said first catch element comprising one of a catch hook with a double bent portion and a bolt, wherein said second catch element comprises an elongated hole formed in said seat frame, said seat frame comprising a border region, said border region defining said elongated hole.

12. The vehicle seat as claimed in claim 11, further comprising a linear adjuster or a gearing having an inclination-adjusting fitting wherein the seat frame is adjusted in an inclination relative to the stand via the linear adjuster or the gearing having the inclination-adjusting fitting.

13. The vehicle seat as claimed in claim 12, further comprising at least one triple-jointed element, wherein the seat frame is coupled directly to the stand and is connected in an articulated manner to the stand by means of the at least one triple jointed element.

14. The vehicle seat as claimed in claim 13, wherein the at least one inclination-adjusting fitting is provided in the triple-jointed element, said inclination-adjusting fitting being effective between the seat frame or the stand and a link of the triple-jointed element.

15. The vehicle seat as claimed in claim 14, wherein the backrest is attached pivotably by means of at least one said backrest fitting to the seat frame or to backrest adaptors fastened to the seat frame.

16. The vehicle seat as claimed in claim 15, wherein the inclination-adjusting fitting forms a disk-shaped unit and/or the inclination-adjusting fitting comprises a latching fitting or a geared fitting with a self-locking eccentric epicyclic gearing.

17. The vehicle seat as claimed in claim 11, wherein the scissors-type stand has a bottom frame, a top frame arranged thereabove and at least one pair of crossed rockers by means of which the top frame can be adjusted in height over the bottom frame.