APPARATUS AND METHOD FOR IMPROVING WEAR-COMFORT OF A SEATBELT

Abstract

An apparatus and method for improving the safety-relevant wear-comfort of a seatbelt worn by an occupant of a vehicle seat uses at least one sensor to detect the contour and/or position of the seatbelt, at least one actuator system for moving the seatbelt in order to change the contour and/or position, and at least one control module for controlling the actuator system. The control module is operative to control the actuator system automatically as a function of a deviation of the seatbelt contour/position, as detected by the sensor, from a predefined contour/position which reflects correct wear of the seatbelt.

Claims

1. Apparatus for a motor vehicle comprising: a seatbelt wearable by an occupant of a seat of the motor vehicle; a sensor for sensing a seatbelt contour when the seatbelt is worn by the occupant; an actuator system operative to move at least a portion of the seatbelt in a manner to alter the seatbelt contour; and a control module operative to automatically control the actuator system to move the seatbelt as a function of a deviation of the seatbelt contour, as detected by the sensor, to achieve a predefined contour indicating proper wear of the seatbelt by the occupant.

2. The apparatus of claim 1, wherein the sensor is a fiber-optic sensor arranged in the seatbelt.

3. The apparatus of claim 1, wherein the actuator is operative to adjust a vertical placement of the seatbelt relative to the occupant.

4. The apparatus of claim 1, wherein the sensor is further operative to detect tension in the seatbelt.

5. The apparatus of claim 4, wherein the actuator is further operative to adjust tension in the seatbelt.

6. The apparatus of claim 1, wherein the actuator comprises a seatbelt force limiter.

7. Apparatus comprising: a seatbelt wearable by an occupant of a vehicle seat; a sensor sensing a contour of the seatbelt when worn by the occupant; an actuator operative to move the seatbelt to change the contour; and a control module controlling the actuator, as a function of a deviation of the contour detected by the sensor from a predefined contour indicating correct/desired/occupant wear of the seatbelt, to reduce the deviation.

8. The apparatus of claim 7, wherein the sensor is a fiber-optic sensor arranged in the seatbelt.

9. The apparatus of claim 7, wherein the actuator is operative to adjust a vertical placement of the seatbelt relative to the occupant.

10. The apparatus of claim 7, wherein the sensor is further operative to detect tension in the seatbelt.

11. The apparatus of claim 10, wherein the actuator is further operative to adjust tension in the seatbelt.

12. The apparatus of claim 7, wherein the actuator comprises a seatbelt force limiter.

13. A method for improving safety of a seatbelt wearable by an occupant of a vehicle seat, comprising: detecting an actual contour of the seatbelt when worn by the occupant using a sensor; and operating a control module to automatically control an actuator to reposition the seatbelt based upon a deviation of the actual contour from a desired contour determined based upon correct wear of the seatbelt by the occupant.

14. The method of claim 13, wherein the sensor is a fiber-optic sensor arranged in the seatbelt.

15. The method of claim 13, wherein the actuator is operative to adjust a vertical placement of the seatbelt relative to the occupant.

16. The method of claim 13, wherein the sensor is further operative to detect tension in the seatbelt.

17. The method of claim 16, wherein the actuator is further operative to adjust tension in the seatbelt.

18. The method of claim 13, wherein the actuator comprises a seatbelt force limiter.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG. 1 shows an exemplary embodiment of apparatus according to the invention in association with a seatbelt having a first contour before adjustment by the apparatus;

[0030] FIG. 2 shows the seatbelt and apparatus from FIG. 1 after the seatbelt contour is adjusted; and

[0031] FIG. 3 shows a schematic depiction of apparatus according to an embodiment of the disclosed invention.

DETAILED DESCRIPTION

[0032] As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention that may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

[0033] In the different figures, parts which are equivalent in respect of their function are always provided with the same reference symbols, and they are therefore generally also described only once.

[0034] FIG. 1 illustrates an exemplary embodiment of apparatus 1 for improving the safety-relevant wear-comfort of a seatbelt 4 which is worn by an occupant 3 sitting in a vehicle seat 2 of a motor vehicle (not illustrated further). The apparatus 1 comprises at least one sensor 5 (illustrated by way of example in FIG. 1) which is, in the exemplary embodiment shown, a fiber-optic sensor element 5 which is arranged in the seatbelt 4 and extends in the longitudinal direction of the seatbelt 4. The sensor 5 serves to sense an instantaneous, safety-relevant actual wear-comfort property of the seatbelt. In particular, a seatbelt contour and a seatbelt tension of the seatbelt 4 can be sensed by the fiber-optic sensor 5.

[0035] Referring to FIG. 3, the apparatus 1 also comprises at least one actuator system 7 which may, for example, comprise a vertical adjustment device for the seatbelt 4. Vertical adjustment of the upper vehicle-side anchoring point of the seatbelt is possible by means of the vertical adjustment device.

[0036] Referring again to FIG. 3, the apparatus 1 further comprises an electronic control module (ECM) 8 for controlling the actuator system 7. In this context, the ECM 8 is configured to control the actuator system 7 automatically as a function of a deviation of the safety-relevant actual wear-comfort property, sensed by the sensor element 5, from a predefined, safety-relevant set-point wear-comfort property which corresponds to proper wear of the seatbelt 4 by the occupant. Proper wear is defined as a position and fit of the seatbelt relative to the occupant which is, based on all available test results and applicable regulations, expected to provide an optimum combination of safety and comfort for the occupant.

[0037] FIG. 1 illustrates the seatbelt 4 in a first condition wherein a contour and position of the belt relative to the occupant is not in accordance with proper wear of the belt. Here, the seatbelt 4 runs along the neck of the occupant 3 instead of over the shoulder of the occupant. This seatbelt contour and position can be sensed by means of the sensor 5. In particular, the actual contour of the seatbelt is detected by the sensor 5 to deviates from a predefined set-point contour/position corresponding to the correct or proper wear of the seatbelt in the over-the-shoulder profile. The ECM receives the output of the sensor 5, compares the actual contour/position indicated by the sensor output, compares the actual contour with the predefined set-point contour, finds a deviation between the two, and therefore commands the actuator system automatically to bring about a vertical adjustment of the seatbelt in the necessary fashion. The state after adaptation of the seatbelt height, and therefore the contour corresponding to proper wear of the belt, has taken place is illustrated in FIG. 2.

[0038] The apparatus and the method according to the invention have been explained in more detail with reference to an exemplary embodiment illustrated in the figures. The apparatus and the method are, however, not limited to the embodiment described herein but instead also comprise identically acting further embodiments.

[0039] In a preferred embodiment, the apparatus according to the invention and the method for improving at least one accident-related, safety-relevant wear-comfort property of a seatbelt which has been put on by a seat occupant in a motor vehicle are used.

[0040] While exemplary embodiments are described above, it is not intended that these embodiments describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention. Additionally, the features of various implementing embodiments may be combined to form further embodiments of the invention.