Vehicle seat and motor vehicle

Abstract

A vehicle seat for a motor vehicle, comprising a seat back, a seat surface component providing a seat surface, and a belt arrangement as a restraint means for an occupant sitting on the vehicle seat, wherein the belt arrangement comprises two partial belts to form a cross belt to be guided over a chest of the occupant and, for each partial belt, two anchoring means arranged laterally opposite one another in a shoulder contact region of the seat back, wherein, for each partial belt, a first anchoring means is arranged for guiding the partial belt over a shoulder of the occupant at a first height position of the seat back and a second anchoring means is arranged at a second height position, lower than the first height position, for guiding the belt under an armpit of the occupant opposite the shoulder.

Description

[0001] The invention relates to a vehicle seat for a motor vehicle, comprising a seat back, a seat surface component providing a seat surface, and a belt arrangement as a restraint for an occupant sitting on the vehicle seat. The invention also relates to a motor vehicle.

[0002] In motor vehicles, 3-point belts are typically used as occupant restraints. Their belt retractors are located in the B-pillar of the vehicle. If necessary, they can also be integrated into the vehicle seats through modification. These so-called integral belt seats are intended to provide increased comfort. In particular, the seat backrest can be reclined further than previously possible, for example, allowing the occupant to lie down. This type of design is particularly suitable for autonomous driving, where the driver, in particular, as the occupant, does not have to follow the driving situation and strives for a relaxed position in the vehicle seat.

[0003] A not insignificant disadvantage of these 3-point belts and their arrangement is that the problem of so-called submarining can occur when the vehicle is in a reclined or lying position. This means that the occupant can slide under the lap belt, particularly during sudden braking or in the event of a collision between the vehicle and an obstacle. If the pelvis is then held significantly more tightly to prevent submarining or prevented from sliding forward, similarly unintended consequences can occur.

[0004] DE 102 07 429 A1 discloses a seat with a rescue belt system that secures an occupant to the seat for rescue after an accident. The rescue belt system consists of two chest belts, a waist belt, a lap belt, and two leg belts. When the rescue belt system is not in use, the belt sections of each belt are folded or rolled up and stowed in recesses in the seat shell.

[0005] EP 1 880 908 A2 describes a seat arrangement with two shoulder belts and one lap belt, with the two shoulder belts overlapping to form an "X." The seat belts are located at the back of the seat or at the base of the seat, i.e., at the seat foot.

[0006] DE 10 2008 018 681 A1 discloses a four-point safety belt system comprising a first three-point safety belt and a second two-point safety belt. The first safety belt has a shoulder and lap section, while the second safety belt has only a shoulder section. The first safety belt is fastened first by the occupant, and after the second safety belt is fastened, the second safety belt crosses the first safety belt in a crossed position.

[0007] The invention is based on the object of providing a vehicle seat with a novel belt arrangement that reduces submarining and increases safety.

[0008] To achieve this object, a vehicle seat according to the invention of the type mentioned at the outset is provided, in which the belt arrangement for forming a cross belt to be guided over a chest of the occupant comprises two partial belts and, for each partial belt, two anchoring means arranged laterally opposite one another in a shoulder contact area of ​​the seat back, wherein, for each partial belt, a first anchoring means is arranged for guiding the partial belt over a shoulder of the occupant at a first height position of the seat back and a second anchoring means is arranged at a second height position, lower than the first height position, for guiding the belt under an armpit of the occupant opposite the shoulder.

[0009] Thus, once the occupant has sat down in the vehicle seat to fasten their seat belt, they can, for example, take the first of the two partial belts from the first anchoring means and guide it over the first shoulder assigned to the respective anchoring means to the armpit of the second shoulder, which is laterally opposite the first shoulder, and thus to the second anchoring means, or vice versa. The occupant proceeds in a similar manner with the second partial belt, whose first anchoring means is accordingly arranged on the occupant's second shoulder and is laterally opposite the anchoring means on the first shoulder, so that when buckled up, a cross belt is formed from the two partial belts.

[0010] This type of belt arrangement prevents excessive forward displacement due to the securing across the chest and also submarining due to the mounting directly on the armpits of the occupant sitting or lying on the vehicle seat, particularly when the seat backrest is tilted backwards or the vehicle seat is in a reclining position, as can also occur with the driver in autonomous driving. This also increases safety with regard to excessive forward displacement or submarining of the occupant. The belt arrangement can be designed for use on occupants in the 5th to 95th percentile size range, according to which the shoulder contact area in particular can be defined. The partial belts can preferably be padded at least in the armpit area for increased comfort and to further enhance safety.This prevents the partial belts from cutting into the occupant's armpits, whether sitting or lying down, particularly in the event of sudden braking or a collision of the vehicle with an obstacle.

[0011] According to a preferred embodiment of the invention, one of the anchoring means can be a belt retractor, over which the respective partial belt can be unwound, and the other anchoring means can be a belt buckle, over which the respective partial belt can be locked. For this purpose, the anchoring means can be integrated either in the surface of the seat back or in the side of the seat back. However, it is also conceivable for the anchoring means to be arranged on the surface of the seat back or on the side surface of the seat back. Alternatively, a combination of different arrangement variants would also be conceivable. For example, the anchoring means that serves as a belt retractor could be integrated in the backrest surface, while the anchoring means that serves as a belt buckle is integrated in the side of the seat back.Due to the complete integration of the anchoring means and thus the belt arrangement in or on the vehicle seat, an “integral belt” is provided, so to speak, which enables the occupant in particular to assume a very reclined or lying position on the vehicle seat without the belt’s effectiveness being impaired.

[0012] Preferably, an integral arrangement of the anchoring means is implemented, with the respective belt retractors or belt buckles being arranged in a recess in the seat surface so that the occupant does not collide with the respective anchoring means while sitting on the vehicle seat. Due to the recessed arrangement, padding can cover the anchoring means towards the occupant, which is thus less noticeable and increases the occupant's comfort.

[0013] Preferably, the respective first anchoring means of the first and second partial belts can be the belt retractor and the respective second anchoring means of the first and second partial belts can be the belt buckle. With such an arrangement, the belt retractors are located in the first height position, i.e. in the area above the shoulder, while the belt buckles are arranged below the armpit. It has been shown that this allows more comfortable handling of the partial belts. The occupant can grasp the belt over the shoulder and insert it laterally under the armpit. Alternatively, but less preferred, a reverse arrangement is also conceivable, in which the belt retractors are arranged below the armpit and the associated belt buckles are arranged above the shoulders.

[0014] Conveniently, the two partial belts can each have a fastening means, in particular a belt tongue, which can be inserted into the respective belt buckle. The fastening means and the belt buckles are designed such that the fastening means of each partial belt can be fastened exclusively in the belt buckle assigned to that partial belt. An advantage of this arrangement is that the partial belts, or the belt tongues attached to them and the associated belt buckles, have a type of coding, so that a partial belt cannot be accidentally locked using the wrong buckle. This also ensures that the partial belts can only be arranged as a cross belt.The coding can be such, for example, that the belt tongue has a through-hole and a latch of the buckle engages in the through-hole. However, the through-holes and latches can be shaped and / or dimensioned differently, so that there is only one possible combination for each partial belt. Furthermore, the belts can be locked and released independently of each other. Alternatively, it is also conceivable that the locking of both partial belts can be released together and simultaneously using a suitable mechanism, for example, by pressing a button.

[0015] According to a further development of the invention, the belt arrangement can have at least one belt tensioner for the two partial belts. The belt tensioner can act in particular on the winding rollers of the belt retractors, so that the partial belts can be tightened in the shoulder area of ​​the occupant. In addition, the belt buckles can also be equipped with at least one belt tensioner. This offers the occupant additional protection against submarining or excessive forward displacement in the event of sudden braking or a collision of the motor vehicle with an obstacle and can thus contribute to increased safety. The belt tensioner can preferably be designed to be reversible, which has the advantage that, once triggered, it does not have to be removed from the vehicle seat and replaced.

[0016] Furthermore, at least one of the at least one belt pretensioners can be a belt pretensioner jointly assigned to the first anchoring means, which can be configured such that it acts simultaneously on the first anchoring means, in particular the belt retractors, of the first and second partial belts. An advantage of this arrangement is that the two partial belts have a common belt pretensioner, which acts on both winding rollers of the respective belt retractor, so that both partial belts can be tightened simultaneously and to the same extent. This can prevent further injuries due to delays in the activation of separate belt pretensioners or due to different tensioning strengths of separate belt pretensioners. Alternatively, each belt retractor can have its own belt pretensioner, which, for example, acts on only one winding roller of the associated belt retractor.

[0017] Furthermore, the belt arrangement can comprise a lap belt and / or a thigh belt, the anchoring means of which are arranged in a pelvic support area on or in the seat back and / or on or in the seat surface component. An advantage of this arrangement is that additional belts in the lap and / or thigh area can provide the occupant with even greater security while driving and can thus further reduce unwanted movements in the event of sudden braking or a collision of the motor vehicle with an obstacle. However, the lap and / or thigh belts are not connected to the cross belt arranged across the occupant's chest, but are arranged separately on the vehicle seat.

[0018] Furthermore, the invention relates to a motor vehicle comprising at least one vehicle seat according to the invention. All statements regarding the vehicle seat according to the invention can be applied analogously to the motor vehicle according to the invention and vice versa, so that the aforementioned advantages can also be achieved with the motor vehicle.

[0019] Preferably, the motor vehicle can also have a vehicle system designed for autonomous driving. This allows the occupant, in particular the driver, to adjust their vehicle seat to a highly reclined or even lying position, if desired and traffic conditions permit, allowing the occupant to relax without having to fear unwanted motion effects such as submarining.

[0020] Further advantages and details of the present invention will become apparent from the exemplary embodiments described below and from the drawings. In the drawings: Fig. 1 is a schematic diagram of a vehicle seat according to the invention and a belt arrangement arranged thereon, wherein an occupant sitting on the vehicle seat is belted to the vehicle seat via the belt arrangement, Fig. 2 a schematic diagram of a vehicle seat according to the invention and a belt arrangement arranged thereon, wherein an occupant lying on the vehicle seat is belted to the vehicle seat via the belt arrangement, and Fig. 3 a schematic diagram of a motor vehicle according to the invention.

[0021] Fig. 1 shows a vehicle seat 1 in a motor vehicle 2, which comprises a belt arrangement 22. The vehicle seat 1 also comprises a seat back 11 and a seat surface component 21 that provides a seat surface 24. An occupant 3 sits on the vehicle seat 1. In a shoulder contact area 4 of the occupant 3, two anchoring means 5 of the belt arrangement 22 are arranged for each of two partial belts 6 of the belt arrangement 22. The first anchoring means 7 of the first and second partial belts 8, 9 is a belt webbing retractor 10, which is arranged in the seat back 11 above the shoulders 12 of the occupant 3 at a first height position. The second anchoring means 13 of the first and second partial belts 8, 9 is a belt buckle 14, which is arranged in the seat back 11 below the armpits 15 of the occupant at a second height position.

[0022] If the occupant 3 sits down on the vehicle seat 1 to fasten his or her seat belt, the occupant 3 unwinds the first partial belt 8 over the associated belt retractor 10, places it across his or her chest 17 and locks it in the associated belt buckle 14. The occupant 3 proceeds in a similar manner with the second partial belt 9, so that both partial belts 8, 9 are arranged in the form of a cross belt 16 over the chest 17 of the occupant 3 when the occupant 3 is buckled up.

[0023] To ensure that the two partial belts 8, 9 can only be present as a cross belt 16, the belt buckles 14 and the associated fastening means of the partial belts 8, 9 are coded. In this case, the partial belts 8, 9 each have a belt tongue with a through-hole as a fastening means. A latch of the associated belt buckle 14 can, in turn, engage in this through-hole in order to lock the respective partial belt 8, 9 via the belt tongue and the belt buckle 14. The through-holes and the latches are shaped and / or dimensioned differently, ensuring that each belt tongue of the respective partial belt 8, 9 can only be inserted into the associated belt buckle 14.

[0024] Additionally, the occupant 3 can be secured using a lap belt 18 and / or a thigh belt 19, the associated anchoring means 20 of which are arranged in the seat surface component 21 of the vehicle seat 1. The lap belt 18 and the thigh belt 19 are not connected to the first and second partial belts 8, 9, i.e., the cross belt 16. Once the occupant 3 is secured to the vehicle seat 1, they can tilt the seat back 11 backward or place it in a reclining position as desired. This is made possible in particular by the fact that the belt arrangement 22 is fully integrated in or on the vehicle seat 1.

[0025] Fig. 2 shows the vehicle seat 1 and the belt assembly 22 attached thereto, with the occupant 3 strapped to the vehicle seat 1 in a reclining position. Due to the securing of the occupant 3 in the shoulder area 4 via the cross belt 16, particularly under the armpits 15, the occupant 3 is optimally protected against submarining, i.e., the occupant 3 slipping under the lap belt 18, in the event of sudden braking or a collision of the motor vehicle 2 with an obstacle. To increase comfort and safety, a pad 23 is provided on both partial belts 8, 9 in the area of ​​the armpits 15.

[0026] If sudden braking or a collision of the motor vehicle 2 with an obstacle occurs, a belt tensioner 25 tightens both partial belts 8, 9 together and simultaneously in the area of ​​the belt retractors 10, thus the shoulders 12 of the occupant 3, thereby pressing the occupant 3 against the vehicle seat. Additionally, the belt buckles 14 can also have at least one belt tensioner 26, which can also trigger a tightening of the partial belts 8, 9 in the area of ​​the armpits 15, leading to increased safety for the occupant 3.

[0027] Fig. 3 shows the schematic arrangement of at least one vehicle seat 1 and a belt arrangement 22 arranged thereon within the motor vehicle 2, as well as a vehicle system 27 designed for autonomous driving of the motor vehicle. Preferably, all vehicle seats arranged in the motor vehicle 2 are designed as a vehicle seat 1 according to the present invention. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 102 07 429 A1

[0004] EP 1 880 908 A2

[0005] DE 10 2008 018 681 A1

[0006]

Claims

[1] Vehicle seat (1) for a motor vehicle (2), comprising a seat back (11), a seat surface component (21) providing a seat surface, and a belt assembly (22) as a restraint means for an occupant (3) seated on the vehicle seat (1), characterized by , that the belt arrangement (22) for forming a cross belt (16) to be guided over a chest (17) of the occupant (3) comprises two partial belts (8, 9) and for each partial belt (8, 9) two anchor means (7, 13) located laterally opposite each other in a shoulder contact area (4) of the seat back (11), wherein for each partial belt (8, 9) a first anchor means (7) is arranged for guiding the partial belt (8, 9) over a shoulder (12) of the occupant (3) at a first height position of the seat back (11) and a second anchor means (13) is arranged at a second height position, lower than the first height position, for guiding the belt under an armpit (15) of the occupant (3) opposite the shoulder (12). [2] Vehicle seat (1) according to claim 1, characterized by , that one of the anchoring means (7) is a webbing reel (10) over which the respective partial webbing (8, 9) can be unrolled, and the other anchoring means (13) is a webbing lock (14) over which the respective partial webbing (8, 9) can be locked. [3] Vehicle seat (1) according to claim 2, characterized by , that the respective first anchoring means (7) of the first and second partial belt (8, 9) is the belt winder (10) and the respective second anchoring means (13) of the first and second partial belt (8, 9) is the belt buckle (14). [4] Vehicle seat (1) according to claim 2 or 3, characterized by, that the two partial belts (8, 9) each have a fastening means, in particular a belt tongue, wherein this fastening means can be inserted into the respective belt buckle (14), wherein the fastening means and the belt buckles (14) are designed such that the fastening means of each partial belt (8, 9) can be fastened exclusively in the belt buckle (14) assigned to that partial belt (8, 9). [5] Vehicle seat (1) according to any of the preceding claims, characterized by , that the belt arrangement (22) has at least one belt tensioner for the two partial belts (8, 9). [6] Vehicle seat (1) according to claim 5, characterized by , that at least one of the at least one belt tensioner is a belt tensioner jointly assigned to the first anchoring means, which is arranged in such a way that it acts simultaneously on the first anchoring means (7), in particular the belt winders (10), of the first and the second partial belt (8, 9). [7] Vehicle seat (1) according to any of the preceding claims, characterized by , that the belt arrangement (22) further comprises a pelvic belt (18) and / or a thigh belt (19) whose anchor means (20) are arranged in a pelvic contact area on or in the seat backrest (11) and / or on or in the seat surface component (21). [8] Motor vehicle (2) comprising at least one vehicle seat (1) according to any one of claims 1-7. [9] Motor vehicle (2) according to claim 8, characterized by , that the motor vehicle (2) comprises a vehicle system trained for autonomous driving of the motor vehicle (2).

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