Vehicle seat with roller guide

Patent metadata

Field	Value
Publication number	US-9428083-B2
Application number	US-201514685883-A
Country	US
Kind code	B2
Filing date	Apr 14, 2015
Priority date	Apr 16, 2014
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

The invention relates to a vehicle seat with a roller guide. The roller guide includes at least one guide rail, and at least one roller received in the guide rail. A roller cover part of the roller is rollable with a running surface of the roller. The roller cover part is divided into a first circumferential surface-like functional region and a second circumferential surface-like functional region which are arranged one behind the other in a direction of a shaft of the roller. The first region is deformable by pressurization by seat occupation. The first region is in contact with an inner wall on a lower side of the roller and with an inner wall on the upper side of the roller. An outer diameter of the second region has an undersize with respect to a spacing between the inner wall on the upper and lower sides of the roller.

First claim

What is claimed is:

1. A vehicle seat comprising a roller guide, the roller guide having at least one guide rail, which is open at a side at least in part, and at least one roller, which rolls in the guide rail and is connected by at least one shaft to parts of the vehicle seat, a roller cover part of the roller being rollable with at least part of a running surface of the roller along a first inner wall of the guide rail, said first inner wall being arranged on a lower side of the roller, and in parallel with or at an angle to a longitudinal course of the shaft,
wherein the roller cover part of the roller is divided at least into a first functional region and a second functional region which are arranged as circumferential surfaces one behind the other in a direction of the shaft of the roller, and the first functional region of the roller cover part of the roller being deformable by pressurization by means of seat occupation, and being in contact, in a movement-free state without seat occupation, with the first inner wall and with a second inner wall of the guide rail, said second inner wall being arranged on an upper side of the roller and extending in parallel with the first inner wall, and wherein the outer diameter of the second functional region is smaller than a spacing between the first inner wall and the second inner wall.

2. The vehicle seat according to claim 1 , wherein the first functional region is formed substantially in a funnel shape and the second functional region is in a shape of a cylinder.

3. The vehicle seat according to claim 2 , wherein the second functional region is in the shape of a hollow cylinder.

4. The vehicle seat according to claim 1 , wherein the first functional region of the roller is arranged facing a third inner wall of the guide rail, said third inner wall being arranged between the second inner wall and the first inner wall.

5. The vehicle seat according to claim 1 , wherein, in the movement-free state without seat occupation, a ratio of the length of the first functional region and the length of the second functional region, measured in each case in the direction of the shaft of the roller, is of a value ranging from 0.25 to 1.25.

6. The vehicle seat according to claim 5 , wherein in the movement-free state without seat occupation, the ratio of the length of the first functional region and the length of the second functional region, measured in each case in the direction of the shaft of the roller, is 0.75.

7. The vehicle seat according to claim 1 , wherein the first functional region consists of a resilient material.

8. The vehicle seat according to claim 1 , wherein the first functional region is arranged so as to surround a substantially cylindrical portion of the roller which is on an inside in a radial direction of the roller, a cavity substantially in a shape of a hollow cylinder being arranged between the first functional region and the cylindrical portion in the radial direction of the roller.

9. The vehicle seat according to claim 1 , wherein, in the event of pressurization due to seat occupation, the outer diameter of the first functional region of the roller cover part is reduced, in the region of contact with the first inner wall, by 0.5 to 2.5 mm.

10. The vehicle seat according to claim 9 , wherein, in the event of pressurization due to seat occupation, the outer diameter of the first functional region of the roller cover part is reduced, in the region of contact with the first inner wall of the roller, by 1.8 mm.

11. The vehicle seat according to claim 1 , wherein, in the movement-free state without seat occupation, the roller presses, with the expanded first functional region of the roller cover part, against the first inner wall and the second inner wall of the guide rail, in such a way that the roller is blocked inside the guide rail.

12. The vehicle seat according to claim 1 , wherein the second functional region consists of a resilient material.

Assignees

• Grammer Ag

Inventors

• Lehner Norbert
• Kaessner Dirk

Classifications

• F16C29/045

  having rolling elements journaled in one of the moving parts · CPC title

• B60N2/502 Primary

  attached to the base of the seat (B60N2/504 takes precedence) · CPC title

• F16C2202/08

  Resilience, elasticity, super-elasticity · CPC title

• B60N2205/20

  Measures for elimination or compensation of play or backlash · CPC title

• B60N2/508

  Scissors-like structure · CPC title