Seat structure of a vehicle

Abstract

Seat structure (2a, 15a) of a vehicle (1), with at least one headrest (3, 16) attached to it, wherein the seat structure (2a, 15a) supporting the headrest (3, 16) is associated with at least one vibration damper (4, 4') which is formed from a damper mass (4a) and a damper spring (4b) and whose natural frequency is tuned to a resonance frequency of the seat structure (2a, 15a) to be eliminated, characterized in that the at least one vibration damper (4, 4') is formed by an armrest (5, 17) indirectly attached to the seat structure (2a, 15a) via one or more elastomer parts (6), which comprises the damper mass (4a), wherein one or more elastomer parts (6) form the damper spring (4b), and that one or more elastomer parts (6) each formed by a bearing bushing, and that the bearing bushing is part of a fastening point (10) of a bearing block (8) of the armrest (5,17) for attaching the bearing block (8) together with the armrest (5, 17) to the seat structure (2a, 15a) or is part of a swivel bearing (9) of an armrest (5, 17) pivotably mounted on a bearing block (8) attached to the seat structure (2a, 15a).

Description

[0001] The invention relates to a seat structure of a vehicle, in particular a motor vehicle, with at least one headrest attached to it.

[0002] From DE 31 45 150 A1, it is known to attach an armrest or armrest support to a vehicle body panel using mechanical fasteners. Furthermore, from DE 40 07 525 A1, it is known to connect a center armrest in a motor vehicle to the vehicle body via a swivel bearing. The swivel bearing consists of a bearing bushing connected to a support element of the center armrest, in which a rubber bushing is inserted as a friction element to prevent rotation and is held against the vehicle body. The friction element has rubber lips distributed around its circumference and is detachably held by axle bolts on a bearing block connected to the vehicle body via a locking hook.Furthermore, it is known from practical experience that headrests attached to the seat structure of a vehicle are subject to vibrations resulting from the vehicle's operation, which lead to adverse noises and can thus negatively affect the driving comfort of the vehicle occupants. This is where the invention described below comes in.

[0003] The object of the invention is therefore to prevent, or at least effectively reduce, vibrations of a headrest attached to a seat structure resulting from the driving operation of a vehicle.

[0004] Starting with a vehicle seat structure, particularly a motor vehicle, with at least one headrest attached to it, the problem is solved by assigning at least one vibration damper to the seat structure. This damper consists of a damping mass and a damping spring, and its natural frequency is tuned to a resonance frequency of the seat structure that is to be eliminated. By means of this at least one vibration damper, the vibrations of the seat structure that are conventionally observed and excited by the vehicle's operation and transmitted to the headrest are prevented, or at least significantly reduced. A vibration damper is understood to be a vibration damper that is not positioned between two objects, but rather attached to only one object, in this case, the seat structure.The damper mass, together with the damper spring, forms a pendulum whose natural frequency is tuned to the oscillation frequency to be eliminated. At this oscillation frequency, the vibration damper extracts vibrational energy from the seat structure for its own oscillations.

[0005] The dependent claims describe preferred further developments or embodiments of the invention.

[0006] A simple and cost-effective vibration damper is formed by an existing armrest, which is now indirectly attached to the seat structure via one or more elastomer components. The armrest thus forms the damping mass, and the elastomer components form the damping spring. The aforementioned mass of the armrest, the damping spring formed by the elastomer components, and therefore the resulting natural frequency of the vibration damper are tuned to the resonance frequency of the seat structure that is to be eliminated.A particularly simple and cost-effective damper spring, formed by one or more elastomer parts, is achieved when each elastomer part is formed by a bearing bushing. This bushing is preferably part of a mounting point of a bearing block for the armrest, used to attach the bearing block and armrest to the seat structure, or part of a pivot bearing of an armrest pivotably mounted on a bearing block attached to the seat structure. According to a preferred embodiment of the invention, the bearing bushing is arranged or pressed between two concentrically arranged sleeves made of metal or plastic, with one sleeve being supported and attached to the bearing block and the other to the seat structure, or one sleeve being supported and attached to the bearing block and the other to the armrest.The armrest is preferably a center armrest of a rear seat in a vehicle, especially a motor vehicle such as a passenger car, since passenger cars are predominantly driven with few or no passengers and headrests of unoccupied rear seats tend to sway. The armrest can also be an armrest of a front seat, especially the passenger seat.

[0007] The invention is explained in more detail below with reference to the exemplary embodiments schematically depicted in the drawings. However, it is not limited to these, but encompasses all embodiments defined by the claims. The drawings show:

[0008] Fig. 1 extremely schematically a motor vehicle with a seat structure designed according to the invention with a vibration damper,

[0009] Fig. 2 a perspective view of the vibration damper of the seat structure, and

[0010] Fig. 3 a bearing element of the vibration damper in a perspective view.

[0011] Fig. 1 initially shows a vehicle 1 respectively motor vehicle in the form of a passenger car that has a rear bench seat 2 features headrests 3 are assigned to those that are part of the seating structure 2a the rear seat 2 are worn and attached to the same. As already described in the introduction, these are attached to the seat structure. 2a attached headrests 3 from the vehicle's driving operation 1 exposed to resulting vibrations, which lead to adverse noises and can therefore negatively affect the driving comfort of the vehicle occupants.

[0012] To effectively counteract this disadvantageous circumstance, the seating structure 2a a vibration damper 4 assigned, which consists of a retarder mass 4a and a damper spring4b is formed and whose natural frequency corresponds to the resonance frequency of the seat structure to be eliminated. 2a is coordinated. The required mass of the damper mass for this is... 4a and the required spring characteristics of the damper spring 4b are based on the recorded resonance frequency of the seat structure 2a Determinable empirically and / or computationally.

[0013] The vibration damper is advantageous in this case. 4 through an existing armrest 5 formed, which according to Fig. 2 in training of the vibration damper 4 the required damper mass ( 4a ) exhibits and indirectly via several, the required damper spring 4b forming elastomer parts 6 on the seat structure 2a is supported and secured. Like the Fig. As can be seen further in section 2, the substance in question is the rebate mass. 4a functioning armrest 5using swivel bearings 7 on a bearing block 8 around a pivot axis extending in the transverse direction of the vehicle (Y-direction) 9 swiveling armrest 5 The bearing block 8 It merely shows three attachment points as examples. 10 for the force-fit connection of the same to the seat structure by means of mechanical connecting elements not shown in the drawing, such as screws in particular. 2a on.

[0014] As an essential component of said fastening points 10 Each is one as an elastomer part 6 , in particular rubber part, designed bearing bushing which is located between two concentrically arranged sleeves 11 , 12 , respectively between an inner and an outer sleeve 11 , 12 is arranged or pressed from metal or plastic ( Fig. 3) One sleeve 11, 12 is attached to the bearing block 8 supported and fastened, whereas the other sleeve 12 , 11 on the seat structure 2a supported and fastened (not shown in detail in the drawing).

[0015] In the present case, the outer sleeve 12 for easy attachment of the elastomer part 6 respectively bearing bushing as well as inner and outer sleeve 11 , 12 formed connecting element 13 a mounting flange 14 on, which in turn is connected to the seat structure 2a or the bearing block 8 It can be connected using mechanical fasteners not shown in the drawing, such as screws. The inner sleeve 11 Preferably, a single, through-threaded fastening screw is assigned (not shown in the drawing).

[0016] However, the invention is not limited to this embodiment, but encompasses any other suitable joining method known per se for fixing the sleeves. 11 and 12 , which can also be of a material nature (welding, gluing). Likewise, one of the sleeves can also be 11 , 12 or can both sleeves 11 , 12 one-piece with the respective joining partner of the joining assembly in question, consisting of a seat structure 2a and bearing block 8 be trained (not depicted graphically).

[0017] The three elastomer parts provided here 6 The bearing bushings, in combination, form the damper spring. 4b off. The armrest 5 including bearing block 8 is therefore indirectly via the aforementioned elastomer parts 6 on the seat structure 2asupported and secured. For the expert, it goes without saying that the armrest 5 should have been switched into their operational position (cf. Fig. 1) in order to be able to achieve their intended damping effect sufficiently.

[0018] Furthermore, the invention is not limited to the vibration damper described above. 4 , in which the elastomer parts 6 in the area of ​​the fastening points 10 arranged connecting elements 13 the damper spring 4a not only train, but also include a design variant of a vibration damper. 4 , where the swivel bearings are used instead 7 the armrest 5 the damper spring 4a to form (not shown in the drawing). This can be done in accordance with the previously described connecting elements. 13 , consisting of one between the sleeves 11 , 12 arranged elastomer part 6in the form of a bearing bushing, which is a sleeve 11 , 12 on the bearing block 8 and the other sleeve 12 , 11 on the armrest 5 to be attached (not shown in the drawing). The elastomer parts 6 the swivel bearing 7 now form the damper spring 4a out. The bearing block 8 is firmly attached to the seat structure 2a connected, for example screwed together.

[0019] Another variant of a design featuring a swiveling armrest 5 formed vibration damper 4 is characterized by the fact that both in the aforementioned attachment points 10 as well as in the swivel bearings 7 said damper spring 4a forming elastomer parts 6 are planned (not shown in the drawing).

[0020] Furthermore, it may also be appropriate, and is also covered by the invention, to use a non-swivelable armrest. 5 to provide for which they constantly maintain their intended functional or usage position (cf. Fig. 1) has and by means of one or more connecting elements 13 of the type described above on the seating structure 2a is attached (not shown in the drawing).

[0021] The above embodiments refer to a vibration damper. 4 in the form of a specially designed armrest 5 Furthermore, the invention is not limited to said armrest. 5 , but encompasses any other suitable seating structure 2a associated vibration damper 4 , which is achieved by means of a damper spring 4b on the seat structure 2a stored retarder mass 4a is formed. For example, it can be based on the armrest.5 a rod-shaped damping mass 4a are planned to be attached to the seating structure 2a by means of a damper spring 4b It is made of an elastomer and has no other function than vibration damping (not shown in the drawing). Such a vibration damper 4 can, for example, be incorporated into a rearward-facing seat structure 2a the rear seat 2 then reach into the trunk.

[0022] Furthermore, the invention is not limited to a rear seat. 2 limited, but also includes a front seat 16 of the vehicle 1 with headrest 17 , in particular a passenger seat, the seat structure of which 16a , a vibration damper 4´ in the form of, for example, an armrest directly associated with it 18 exhibits one of the aforementioned design variants. Reference symbol list 1 vehicle 2 Rear seat 2a Seat structure 3 Headrest 4 vibration dampers 4' Vibration damper 4a Retentive mass 4b Damper spring 5 Armrest 6 Elastomer part 7 swivel bearings 8 bearing block 9 swivel axis 10 mounting points (bearing block) 8 ) 11 Sleeve 12 Sleeve 13 Connecting element 14 Mounting flange 15 Front seat 15a Seat structure 16 Headrest 17 Armrest QUOTES INCLUDED IN THE DESCRIPTION

[0023] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0024] DE 3145150 A1

[0002] DE 4007525 A1

[0002]

Claims

[1] Seat structure ( 2a , 16a ) of a vehicle ( 1 ), in particular motor vehicle, with at least one headrest attached to it ( 3 , 17 ), characterized by that the headrest ( 3 , 17 ) supporting seat structure ( 2a , 16a ) at least one vibration damper ( 4 , 4´ ) is assigned, which consists of a retarder mass ( 4a ) and a damper spring ( 4b ) is formed and whose natural frequency corresponds to a resonance frequency of the seat structure to be eliminated ( 2a , 16a ) is agreed upon. [2] Seat structure ( 2a , 16a ) according to claim 1, characterized by that at least one vibration damper ( 4 , 4´ ) by means of an indirect connection via one or more elastomer parts ( 6 ) on the seat structure ( 2a , 16a ) attached armrest ( 5 , 17 ) is formed. [3] Seat structure ( 2a , 16a ) according to claim 2, characterized by that one or more elastomer parts () are each formed by a bearing bushing. [4] Seat structure ( 2a , 16a ) according to claim 3, characterized by that the bearing bushing is part of a fastening point ( 10 ) of a bearing block ( 8 ) the armrest ( 5 , 17 ) for attaching the bearing block ( 8 ) including armrest ( 5 , 17 ) on the seat structure ( 2a , 16a ) or component of a swivel bearing ( 9 ) a swiveling one on the seat structure ( 2a , 16a ) attached bearing block ( 8 ) mounted armrest ( 5 , 17 ) is. [5] Seat structure ( 2a , 16a ) according to claim 4, characterized by that the bearing bushing is located between two concentrically arranged sleeves ( 11 , 12) is made of metal or plastic, arranged or pressed, wherein one sleeve ( 11 , 12 ) on the bearing block ( 8 ) and the other sleeve ( 12 , 11 ) on the seat structure ( 2a , 16a ) or the one sleeve ( 11 , 12 ) on the bearing block ( 8 ) and the other sleeve ( 12 , 11 ) on the armrest ( 5 , 17 ) is supported and secured. [6] Seat structure ( 2a , 16a ) according to any one of claims 1 to 5, characterized by that the armrest ( 5 ) a center armrest of a rear seat bench ( 2 ) or an armrest ( 17 ) of a front seat ( 15 ) vehicle ( 1 ) is.

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