阅读说明：本技术 用于车辆座椅的双重配件和车辆座椅 (Double fitting for a vehicle seat and vehicle seat ) 是由 克里斯汀·沃夫 维克多·恩斯 托马斯·迪尔 于 2020-05-04 设计创作，主要内容包括：本发明涉及一种用于车辆座椅(1)的双重配件(100),所述双重配件具有两个相互作用连接的配件(50),其中,每个所述配件(50)包括第一配件部件(111)和第二配件部件(112),其中,所述第一配件部件(111)和所述第二配件部件(112)总是处于相互传动连接或者能够相互锁紧并且能够围绕轴线(A)相对转动。双重配件还具有两个相邻设置的适配部件(120、140),其中,第一适配部件(120)与所述第一配件部件(111)中的一个第一配件部件以及第二适配部件(140)与所述第一配件部件(111)中的另一个配件部件连接,或者所述第一适配部件与所述第二配件部件中的一个第二配件部件以及所述第二适配部件与所述第二配件部件中的另一个第二配件部件连接。所述适配部件(120、140)中的一个适配部件能够与车辆座椅(1)的结构部件(80)或者与车辆车身部件连接,以及所述适配部件(120、140)中的另一个适配部件以能够受限制地运动的方式与能够固定地与所述结构部件(80)或者车辆车身部件连接的适配部件(120、140)连接。在所述适配部件(120、140)之间设有弹性元件(170),所述配件(50)的第一配件沿轴向设置在所述适配部件(120、140)之间,以及所述适配部件(120、140)中的一个适配部件沿轴向设置在所述配件(50)之间。本发明此外还涉及一种具有这种双重配件(100)的车辆座椅(1)。(The invention relates to a double fitting (100) for a vehicle seat (1), comprising two fittings (50) that are connected to one another in an interacting manner, wherein each fitting (50) comprises a first fitting part (111) and a second fitting part (112), wherein the first fitting part (111) and the second fitting part (112) are always in a transmission connection or can be locked to one another and can be rotated relative to one another about an axis (A). The double fitting also has two adjacent adapter parts (120, 140), wherein the first adapter part (120) is connected to one of the first fitting parts (111) and the second adapter part (140) is connected to the other of the first fitting parts (111), or the first adapter part is connected to one of the second fitting parts and the second adapter part is connected to the other of the second fitting parts. One of the adapter parts (120, 140) can be connected to a structural part (80) of the vehicle seat (1) or to a vehicle body part, and the other adapter part (120, 140) is connected in a movement-restricted manner to an adapter part (120, 140) that can be fixedly connected to the structural part (80) or to the vehicle body part. An elastic element (170) is arranged between the adapter parts (120, 140), a first fitting of the fitting (50) is arranged axially between the adapter parts (120, 140), and one of the adapter parts (120, 140) is arranged axially between the fittings (50). The invention further relates to a vehicle seat (1) having such a double fitting (100).)

1. A double fitting (100) for a vehicle seat (1), in particular for a motor vehicle seat, having:

-two co-acting connected fittings (50), wherein each fitting (50) comprises a first fitting part (111) and a second fitting part (112), wherein the first fitting part (111) and the second fitting part (112) of each of the two fittings (50) are always in mutual transmission connection or lockable to each other and relatively rotatable about an axis (a); and

-two adapter parts (120, 140) arranged axially adjacent to one another, wherein a first adapter part (120) is connected to one of the two first fitting parts (111) and a second adapter part (140) is connected to the other of the two first fitting parts (111), or the first adapter part is connected to one of the two second fitting parts and the second adapter part is connected to the other of the two second fitting parts, wherein only one of the adapter parts (120, 140) can be connected to a structural part (80) of the vehicle seat (1) or to a vehicle body part, and the other of the adapter parts (120, 140) can be connected to a structural part of the vehicle seat (1) in a restrained manner, in particular in a restrained manner with respect to rotation about the axis (a) Component (80) or an adapter part (120, 140) which can be fixedly connected to the vehicle body part, wherein at least one elastic element (170) is arranged between the adapter parts (120, 140),

characterized in that a first of the two fittings (50) of the double fitting (100) is arranged axially between the two adapter parts (120, 140) and one of the two adapter parts (120, 140) is arranged axially between the two fittings (50) of the double fitting (100).

2. Double fitting (100) according to claim 1, characterised in that the elastic element (170) is of a material having a greater compliance than the material of the adapter part (120, 140) in the region in which the at least one elastic element (170) abuts the adapter part (120, 140).

3. Double fitting (100) according to claim 1 or 2, characterised in that the at least one spring element (170) has, in particular is made of, a spring material, in particular a plastic or rubber material.

4. Double fitting (100) according to any of the claims 1 to 3, wherein the at least one elastic element (170) is a bearing bush.

5. Double fitting (100) according to one of the claims 1 to 4, characterised in that the at least one elastic element (170) is arranged radially and/or axially between the adapter parts (120, 140).

6. Double fitting (100) according to one of the claims 1 to 5, characterized in that the second fitting part (140) has at least one bushing, in particular at least one threaded bushing (180), which radially supports the at least one elastic element (170) and supports the first fitting part (120) by means of the at least one elastic element (170).

7. The double fitting (100) according to claim 6, wherein the at least one bushing is a threaded bushing (180).

8. Double fitting (100) according to one of the claims 1 to 7, characterised in that the second fitting part (140) is arranged axially between two fittings (50) of the double fitting (100).

9. Double fitting (100) according to one of claims 1 to 8, characterised in that the first adapter part (120) is fixed to a first fitting part (111) of the fitting (50) which is arranged between the two adapter parts (120, 140) of the double fitting (100), and an adapter (160) is fixed to a second fitting part (112) of the fitting (50).

10. Double fitting (100) according to claim 9, characterised in that the adapter (160) axially overlaps the other fitting (50) of the double fitting (100).

11. Double fitting (100) according to claim 10, characterised in that the first fitting part (120) is fixed on the first fitting part (111) of the further fitting (50).

12. Vehicle seat (1) having a backrest (20) and a seat part, wherein the backrest (20) can be connected to a structural part (80) of the seat part or to a vehicle body part by means of a double fitting (100) according to one of claims 1 to 11.

13. Vehicle seat (1) according to claim 12, characterised in that a further backrest (30) of the vehicle seat (1) is connected or connectable with a structural component (80) of the vehicle seat (1) by means of a further fitting (50).

14. The vehicle seat (1) as claimed in claim 13, characterized in that one fitting part (111, 112) of the further fitting (50) is fixedly connected to one of the adapter parts (120, 140), in particular the first adapter part (120), if necessary with the interposition of a spacer (126).

15. Vehicle seat (1) according to claim 14, characterised in that one fitting part (111, 112) of the further fitting (50) is fixedly connected with one of the adapter parts (120, 140) if necessary with the interposition of a spacer (126).

Technical Field

The invention relates to a double fitting for a vehicle seat, in particular for a motor vehicle seat, having two fittings which are connected to one another, wherein each of the two fittings comprises a first fitting part and a second fitting part, wherein the first fitting part and the second fitting part of each of the two fittings are always in a transmission connection or can be locked to one another and can be rotated relative to one another about an axis; and two adapter parts which are arranged adjacent to one another in the axial direction, wherein the first adapter part is connected to one of the two first fitting parts and the second adapter part is connected to the other of the two first fitting parts, or the first adapter part is connected to one of the two second fitting parts and the second adapter part is connected to the other of the two second fitting parts, wherein only one of the adapter parts can be fixedly connected to a structural part of the vehicle seat or can be fixedly connected to a vehicle body part, and the other of the two adapter parts is connected to the adapter part which can be fixedly connected to the structural part of the vehicle seat or to the vehicle body part in a manner such that it can be moved in a limited manner, in particular can be rotated in a limited manner about an axis, wherein at least one elastic element is provided between the adapter parts. The invention further relates to a vehicle seat having such a double fitting.

Background

In such a vehicle seat in which a safety belt is integrated, i.e. in which several or all of the fastening points of the safety belt system are connected to the vehicle seat, a considerably greater load is generated in the fitting used as a backrest adjuster in the event of a crash than in a vehicle seat without an integrated safety belt, as a result of the connection of the safety belt or of the belt retractor of the safety belt to the upper edge of the backrest of the vehicle seat. The high development costs required for fittings specifically designed for these high loads often conflict economically with the usually small production data of such seat integrated with a safety belt. Since the strength requirements for the fitting in a seat with integrated safety belt are often in the range of double the strength of fittings for conventional seats without safety belt connected to the backrest, at most two identical fittings for a seat with integrated safety belt are connected in parallel as a double fitting and are fixedly connected to one another in order to provide the fitting for a seat with integrated safety belt in an economical manner. DE 3529887 a1 discloses such a double fitting.

In the case of a parallel connection of two separate, rigidly connected fittings to one another into a double fitting, the load in the event of a crash is distributed over the two connected fittings, so that the strength requirements are met. Despite the rigid connection to one another, the design of the two fittings also meets the functional requirements, such as are customary in single fittings, with regard to the freedom from play during driving operation and the maximum reliable actuating torque during adjustment.

In the use of a continuous backrest adjuster, as disclosed for example in DE 102011012076 a1, i.e. a typical pivoting drive fitting (also referred to as drive fitting) with a wedge-shaped eccentric element for ensuring play-free, the known component tolerances are compensated for by a wedge-shaped eccentric system comprising two spring-biased, arcuate wedges. The actual wheelbase of the two transmission parts is automatically adjusted by the wedging movement to the extent required each time to ensure play-free. Within the range of the desired overall variation of the component tolerances of the parts of the individual fittings, an economically manufacturable individual fitting without play and which is nevertheless easily adjustable is achieved with this technique. In the case of an absolutely rigid connection of the two individual fittings to one another, i.e. a rigid connection of both the first fitting part and the second fitting part to one another (in which the same wheelbase dimensions of the two fittings are fixed to equal dimensions), the actually required wheelbases of the two interconnected fittings are no longer formed independently of one another. Therefore, additional higher requirements have to be made on the tolerance compensation capability of the wedge eccentric system, or the reliable tolerance range of the parts has to be limited to a greater extent than is required for a single fitting. Both possibilities imply additional costs in the production process, either in terms of the manufacture of the parts (which require the assembly of other parts to each other) or in terms of the joining process (in which the individual parts must be connected to each other in precise relative alignment).

DE 102006000532 a1 discloses a double fitting having two fittings which are connected to one another, wherein each of the two fittings has a first fitting part and a second fitting part, which are in toothed engagement with one another. One of the two fittings has a wedge-shaped eccentric element arranged between the first fitting part and the second fitting part for the backlash-free meshing. Instead of the wedge-shaped eccentric part, the other of the two fittings has a supporting element, which is arranged between the first fitting part and the second fitting part and has a smaller eccentricity than the wedge-shaped eccentric part of the other fitting. In normal operation of the double fitting, only the wedge-shaped eccentric part is supporting, while the supporting element is not. The supporting elements additionally support the toothed engagement after a limited deformation of the double fitting, as occurs in particular in a vehicle collision.

DE 102004049114B 4 discloses a double fitting comprising a first fitting part, a second fitting part and an eccentric part, which are each arranged on the same rotational shaft. The first fitting part is formed by two first fitting part elements. The second fitting part is formed by two second fitting part elements.

DE WO 2015/132215 a1 discloses a double fitting for a vehicle seat, having two fittings which are connected to one another, wherein each of the two fittings has a first fitting part and a second fitting part which can be rotated relative to one another about an axis, wherein the first fitting part and the second fitting part are in driving connection with one another or can be locked to one another; and two adapter parts which are arranged adjacent to one another in the axial direction, wherein the first adapter part is connected to one of the two first fitting parts and the second adapter part is connected to the other of the two first fitting parts, or the first adapter part is connected to one of the two second fitting parts and the second adapter part is connected to the other of the two fitting parts. According to the invention, it is provided that only one of the adapter parts can be fixedly connected to the structural part of the vehicle seat and the other of the two adapter parts can be rotated about the axis to a limited extent relative to the structural part and relative to the adapter part which can be fixedly connected to the structural part.

WO 2015/104260 a1 discloses a vehicle seat having a seat section which comprises a first seat having a first backrest and a second seat having a second backrest, and a seat part, wherein the first backrest and the second backrest are connected to the seat part and can be pivoted about a pivot axis relative to the seat part, and a first fitting is provided, the first fitting part of which is connected to the seat part in a rotationally fixed manner, and a second fitting is provided, the first fitting part of which is connected to the first backrest in a rotationally fixed manner, and the second fitting part of which is connected to the second backrest in a rotationally fixed manner.

Disclosure of Invention

The object of the invention is to improve a double fitting of the type mentioned at the beginning, in particular to connect two fittings known per se to one another, so that their function is ensured without additional expenditure in normal use, while the two fittings are subjected to high loads in the event of a crash. Noise development due to contact between components, in particular between adapter parts, should be avoided. Furthermore, a vehicle seat having such a double fitting that meets high strength and functional requirements is to be provided.

This object is achieved by a double fitting for a vehicle seat, in particular for a motor vehicle seat, having two fittings which are connected to one another, wherein each of the two fittings comprises a first fitting part and a second fitting part, wherein the first fitting part and the second fitting part of each of the two fittings are always in a transmission connection or can be locked to one another and can be rotated relative to one another about an axis; and two adapter parts which are arranged axially adjacent to one another, wherein the first adapter part is connected to one of the two first fitting parts and the second adapter part is connected to the other of the two first fitting parts, or the first adapter part is connected to one of the two second fitting parts and the second adapter part is connected to the other of the two second fitting parts, wherein only one of the adapter parts can be fixedly connected to a structural part of the vehicle seat or can be fixedly connected to a vehicle body part, and the other of the two adapter parts is connected to the structural part of the vehicle seat or to the adapter part which can be fixedly connected to the vehicle body part in a manner such that it can be moved in a limited manner, in particular can be rotated in a limited manner about the axis, wherein at least one elastic element is provided between the adapter parts.

The first of the two fittings of the double fitting is arranged axially between the two adapter parts. One of the two adapter parts is arranged axially between the two fittings of the double fitting. Preferably, the second adapter part is arranged axially between two fittings of the double fitting. An alternative arrangement between the adapter part and the fitting, which in particular can be better covered with a plastic trim panel, is thus obtained with respect to the double fitting known from the prior art.

The two fittings are connected to one another in an interacting manner, so that an adjustment (change in angle) of one of the two fittings also entails a largely similar adjustment (change in angle) of the other fitting. For this purpose, the two fittings are connected to one another, for example, by a transmission rod. In order to compensate for play and/or tolerances of the two fittings, one adapter part is connected to the other adapter part in a manner such that limited movement is possible. The two adapter parts can only move relative to one another to a limited extent, as required to compensate for play and/or tolerances in the fitting. Furthermore, the adapter parts are connected to one another in a rotationally fixed manner about the axis with the interposition of an elastic element. The limited rotation between the adapter parts about the axis (if necessary after a free stroke) elastically deforms the elastic element. The spring element damps the mutual impact of the adapter parts and thus prevents an undesired formation of noise.

The resilient element may have a material with a compliance that is greater than the compliance of the material of the first adapter part. The spring element can have a material with a greater compliance than the material of the first adapter part in the region of the latter abutting the at least one spring element. The resilient element may be of a material having a compliance greater than the compliance of the material of the second adapter part. The spring element can have a material with a greater compliance than the material of the second adapter part in the region of the second adapter part adjacent to the at least one spring element.

The at least one elastic element may have an elastic material. The at least one spring element may comprise a plastic. The at least one resilient element may have a rubber material. The at least one resilient element may be made of a resilient material. The at least one resilient element may be made of plastic. The at least one resilient element may be made of a rubber material.

The at least one resilient element may be arranged radially between the adapter parts. The at least one resilient element may be arranged axially between the adapter parts.

The at least one resilient element may be a support bush. The at least one resilient element may be an annular bearing bush. The at least one resilient element may be a support bushing having an I-shaped cross-section. The at least one resilient member may be a support bushing having an L-shaped cross-section. The at least one resilient element may be a support bushing having a C-shaped cross-section. The at least one resilient element may be a support bush having a U-shaped cross-section.

Both adapter parts preferably have at least one bushing. The bushing may be welded into the second adapter part. The bushing may be pressed into the second adapter part. The bushing can be fixed to the second adapter part in a form-fitting manner. The bushing may be a threaded bushing. The bushing may be a flange in the second adapter part. The at least one resilient element may be disposed on the at least one bushing. The at least one resilient element may be sleeved onto the at least one bushing. The at least one resilient element may radially support the first adapter part. The at least one resilient element may radially support the first adapter part.

The first adapter part can be fastened to the first fitting part and an adapter to the second fitting part of the fitting arranged between the two adapter parts of the double fitting. The adapter preferably axially overlaps the other fitting of the double fitting. The second adapter part can be fixed to the first fitting part of the further fitting.

The limited mobility between the adapter parts of the double fitting is achieved by the at least one elastic element being elastically deformable. Here, the gap between the at least one spring element and at least one of the two adapter parts makes limited mobility possible without elastic deformation of the at least one spring element. The elastic element then serves only as an impact attenuator.

The double fitting preferably has two transmission fittings. However, it can also be advantageous according to the invention to design a double fitting consisting of two latching fittings. In the case of snap fittings, there is also the fundamental problem of functional interaction in the event of imprecise positioning of the centers of the individual fittings, and for example when sweeping through large angles in order to allow the backrest to swing freely, this can lead to undesirable contact situations and to an increase in the swinging force.

The object is also achieved by a vehicle seat having a backrest and a seat part, wherein the backrest is connected to a component of the seat part or can be connected to a vehicle body part by means of a double fitting according to the invention. The backrest may be hinged to the structural part of the seat part. The seat part can be movable in the longitudinal direction by means of seat rails known per se, in particular relative to the vehicle body in which the seat can be mounted. The backrest may alternatively be directly articulated to one or more vehicle body parts. The force flux of the forces introduced into the backrest is introduced directly into the vehicle body by the double fitting while bypassing the seat part.

The other backrest of the vehicle seat can be connected to the structural part of the seat part by means of a further fitting. The other backrest of the vehicle seat can be connectable to a vehicle body part via another fitting. One fitting part of the further fitting can be fixedly connected to one of the adapter parts, in particular the first adapter part. The fitting part of the further fitting can be fixedly connected with one of the adapter parts, in particular the first adapter part, with the interposition of a spacer.

One of the two adapter parts, in particular the first adapter part, can be fixedly connected to the component of the seat part. The other of the two adapter parts, in particular the second adapter part, can be movable in a limited manner, in particular rotatable about an axis relative to the component of the seat part. Alternatively, only one of the two adapter parts can be fixedly connected to the backrest, and the other of the two adapter parts can be limitedly movable, in particular rotatable about an axis relative to the backrest.

In other words, the object is solved in particular by: the two fittings of the double fitting according to the invention are fixedly connected to one another on both sides of the fitting, in particular on one of the two transmission sides, but have a free gap on the other side, which is at least partially damped by the elastic element, which gap is always present during normal operation of the vehicle seat. The two fittings can thus exert their function separately from one another in the region relevant for the main functional characteristic, while the gap is crossed after a definable deformation of the at least one spring element and the first fitting and/or the structural component in the event of a crash, the second fitting is brought into contact with the first fitting in the load direction, and then the two fittings together bear the load.

Drawings

The invention will be described in detail below on the basis of advantageous embodiments shown in the drawings. The invention is not limited to this embodiment. In the drawings:

figure 1 shows a perspective view of a backrest of a vehicle seat according to the invention,

fig. 2 shows a detail II of fig. 1, namely a perspective view of a double fitting according to the invention and further components of a vehicle seat according to the invention,

figure 3 shows a further perspective view of the double fitting according to the invention and further components of the vehicle seat according to the invention as in figure 1,

figure 4 shows an exploded view of a double fitting according to the invention and further components of a vehicle seat according to the invention as in figure 1,

FIG. 5 shows a sectional view of the double fitting according to the invention (in the region of the spring element of the double fitting) and the structural part of the first seat part, and

fig. 6 shows a detail of fig. 5.

Detailed Description

Fig. 1 shows in particular three backrests 20, 30, 40 of a vehicle seat 1 according to the invention. The vehicle seat 1 shown is designed as a rear seat arrangement of a motor vehicle. In a variant of this embodiment, the vehicle seat according to the invention is a front seat of a motor vehicle.

The vehicle seat 1 comprises a first seat section with a first seat 11 and a second seat 12, and a second seat section with a third seat 13. Preferably, the two seat segments can be connectable to the body structure of the motor vehicle seat in such a way that they can be adjusted longitudinally independently of one another by means of a longitudinal adjuster known from the prior art, but not shown in fig. 1.

The vehicle seat 1 is described below using three mutually perpendicular spatial directions of a vehicle coordinate system. The longitudinal direction x is largely horizontal in the vehicle seat 1 installed in the vehicle and preferably extends parallel to the vehicle longitudinal direction, which corresponds to the normal direction of travel of the vehicle. The transverse direction y, which extends perpendicularly to the longitudinal direction x, is generally oriented horizontally in the vehicle and extends parallel to the transverse direction of the vehicle. The vertical direction z extends perpendicular to the longitudinal direction x and perpendicular to the transverse direction y. In the vehicle seat 1 mounted in the vehicle, the vertical direction z extends parallel to the vehicle height axis.

The positional and directional specifications used, such as front, rear, upper and lower, relate to the point of view of the passenger seated in the vehicle seat 1 in the normal sitting position, wherein the vehicle seat 1 is mounted in a vehicle in a use position in which the backrest 20, 30, 40 suitable for transporting the passenger is largely upright and is oriented generally toward the direction of travel. The vehicle seat 1 according to the invention can also be mounted with a different orientation, for example transversely to the direction of travel.

The first seat segment shown occupies approximately 60% of the entire width of the vehicle seat 1 in the transverse direction y, while the second seat segment occupies approximately 40% of the width in the transverse direction y. The first seat segment provides a seating place for two passengers (seats 11, 12). The second seat segment provides a seating place for a third passenger (third seat 13).

The first backrest 20 and the second backrest 30 are mounted on a first seat part, not completely shown in the figures, of the vehicle seat 1 so as to be pivotable independently of one another about the axis a. The first seat member is preferably a continuous bench seat for two passengers of the first seat section.

The third backrest 40 is pivotably mounted on a second seat part of the vehicle seat 1, which is not completely shown in the figures. The second backrest 30 is arranged between the first backrest 20 and the third backrest 40, seen in the transverse direction y. The axis a extends horizontally parallel to the transverse direction y.

The first backrest 20 and a part of the first seat part together form a first seat 11. The second backrest 30 together with a portion of the first seat member forms the second seat 12. The third backrest 40 together with the second seat part forms a third seat 13. The first seat 11 and the second seat 12 are assigned to the first seat segment and the third seat 13 is assigned to the second seat segment.

The first backrest 20 is hinged to the structural part 80 of the first seat part in a side region close to the second backrest 30 by means of a double fitting 100 according to the invention. The first backrest 20 is hinged to the first seat part in the side region remote from the second backrest 30 by means of a fitting 50. The second backrest 30 is hinged to the first seat part in the region close to the first backrest 20 by means of a fitting 50. The second backrest 30 is articulated to the first seat part in the side region remote from the first backrest 20 by means of a further fitting 50.

In the upper corner region of the first backrest 20, a belt retractor of a three-point belt system is provided, by means of which a passenger of the second seat 12 can be secured. In the event of a crash, the force of the seat belt is introduced into the first backrest 20 by means of the seat belt retractor. While the belt forces are largely absorbed by the side regions of the first backrest 20 close to the second backrest 30 and the double fitting 100 arranged below the belt retractor and are transmitted further into the structural component 80, the fitting 50 arranged on the opposite side of the first backrest 20 is subjected to a significantly smaller load and can therefore be designed as a single standard element.

A double fitting 100 according to the invention and its arrangement in a first seat segment is described below with reference to fig. 2 to 6.

The double fitting 100 comprises two fittings which are arranged parallel in the flux of force and can therefore withstand greater forces and moments of force before components of the double fitting 50, in particular one of the two fittings 50, fail. The two fittings 50 of the double fitting 100 shown, like the remaining fittings 50 of the vehicle seat 1, are each embodied as a transmission fitting, in particular as a pendulum fitting, as is known, for example, from DE 102009053250 a 1. The present invention is not limited to a drive fitting. In principle, a double design according to the invention of the fitting for high-load applications can also be realized with a snap-on fitting, as disclosed, for example, in DE 102009041490 a 1.

The double fitting 100 is formed by two identical fittings 50 known per se, which are identical in their construction to the remaining fittings 50 of the vehicle seat 1. Each of the two fittings 50 of the double fitting 100 comprises a first fitting part 111 and a second fitting part 112 which can be rotated relative to one another about the axis a and which are in driving connection with one another in the case of the fitting 100 being designed as a driving fitting or which can be locked with one another in the case of the fitting 100 being designed as a snap fitting. Axis a defines the directional description of a cylindrical coordinate system used below. The cylindrical coordinate system of the double fitting 100 is oriented in the vehicle coordinate system such that the axis a is oriented parallel to the transverse direction y.

The inclination of the first backrest 20 is adjustable about the axis a by means of a double fitting 100 and a single fitting 50. The two fittings 50 of the double fitting 100 and the single fitting 50 are connected to each other by a transfer rod 60. In the case of a transmission fitting designed as a pivot fitting, the axis a pivots slightly eccentrically with respect to the vehicle coordinate system. Due to the pivoting movement of the axis a, the first fitting part 111 pivots relative to the second fitting part 112 in a pivot fitting. A pivoting movement with a defined eccentricity is superimposed on the relative rotational movement of the two fitting parts 111, 112. The eccentricity is preferably less than 10 mm.

Each of the two fittings 50 of the double fitting 100 has a follower 52 for driving an adjusting movement between the respective first fitting part 111 and second fitting part 112. The followers 52 each have an internal tooth 54. The transmission rod 60 has an external toothing which corresponds to the internal toothing of the followers 52, so that a transmission rod 60 pushed into the followers 52 connects the two followers 52 to one another in a rotationally fixed manner. Furthermore, the follower 52 of the fitting 50, which is arranged on the opposite side of the first backrest 20, is connected in the same way in a rotationally fixed manner to the transmission rod 60. Accordingly, the transmission rod 60 is pushed into the internal teeth of the output member of the transmission motor 70, so that the operation of the transmission motor 70 causes a rotational movement of the transmission rod 60, so that both the fitting 50 of the double fitting 100 and the follower 52 of the single fitting 50 are driven and the inclination of the first backrest 20 is changed.

The double fitting 100 comprises, in addition to the two fittings 50, a first adapter part 120, a second adapter part 140 and an adapter 160. The second adapter part 140 can be fixedly connected to the structural part 80 of the vehicle seat 1, in particular can be screwed in by means of two screws 190. The first adapter part 120 is connected in a manner described below to the second adapter part 140 in a limited rotation about the axis a.

The first adapter part 120 is connected, in particular welded, to the first fitting part 111 of the first of the two fittings 50 of the double fitting 100. The second adapter part 140 is connected, in particular welded, to the first fitting part 111 of the second of the two fittings 50 of the double fitting 100.

The adapter 160 is fixedly connected with the second fitting part 112 of the first of the two fittings 50 of the double fitting 100. For this purpose, the adapter 160 has a disk-shaped region which is connected, in particular welded, to the second fitting part 112 of the first of the two fittings 50 of the double fitting 100. The adapter 160 can furthermore be fixedly connected to the structural component 22 of the first backrest 20. For this purpose, the adapter 160 has a ring-segment-shaped region which overlaps in the transverse direction y on the second fitting of the two fittings 50 of the second adapter part 140 and the double fitting 100 and is fixedly connected, in particular welded, to the structural component 22 of the first backrest 20. Furthermore, the second fitting part 112 of the second of the two fittings 50 of the double fitting 100 can also be connected, in particular welded, to the first backrest 20.

The first adapter part 120 has a fastening section 122. The fastening section 122 is flanged in the radial direction away from the axis a. The second adapter part 140 has a fastening section 142. The fastening section 142 is radially flanged away from the axis a. The fastening section 142 is bent in the transverse direction y, so that, on the one hand, the first fitting of the two fittings 50 of the double fitting 100 and the adapter 160 are arranged between the two adapter parts 120, 140, and, on the other hand, the two fastening sections 122, 142 abut one another in a surface-contacting manner in the region lying radially outside the fitting 50.

The fastening section 122 of the first adapter part 120 has two through holes 124. The fastening section 142 of the second adapter part 140 has two through holes 144. The through-hole 124 of the first adapter member 120 is aligned with the through-hole 144 of the second adapter member 140.

In each of the two through-openings 124 of the first adapter part 120, a spring element embodied as a bearing bush 170 is inserted. The support bushings 170 each have a U-shaped cross-section and have a web 174 and two flanges 172. The web 174 is for support in the radial direction. The two flanges 172 serve for support in and against the axial direction (transverse direction y).

A bushing embodied as a threaded bushing 180 is inserted into each of the two through holes 144 of the second adapter part 140 and is preferably welded to the second adapter part 140. In a variant of this embodiment, the threaded bushing is integrated in the second adapter part, for example drawn out of the adapter part.

Threaded bushings 180 have internal threads 182 and shoulders 184, respectively. The threaded bushings 180 are inserted into the second adapter part 140 toward the first adapter part 120, respectively. Here, the shoulder 184 rests against the second adapter part 140 on the side facing away from the adapter part 120.

To screw the double fitting 100 to the structural part 80, in each case a screw 190 is inserted through a through-opening in the structural part 80 and the external thread 194 of the screw 190 is screwed into the internal thread 182 of the threaded bushing 180. Here, the structural part 80 is clamped between the screw head 192 of the screw 190 and the threaded bushing 180, so that the second adapter part 140 and the structural part 80 are fixedly connected to one another.

The threaded bushings 180 support a bearing bushing 170 on their outer periphery, respectively. The adapter parts 120, 140 are therefore connected to one another in a rotationally fixed manner about the axis a with the interposition of a bearing bush 170 as an elastic element. The adapter parts 120, 140 are capable of limited relative rotation about the axis a, if necessary after passing through an idle stroke caused by a clearance between the threaded bushing 180 and the bearing bushing 170 and/or a clearance between the bearing bushing 170 and the first adapter part 120. The relative rotation of the adapter members 120, 140 preferably causes the bearing sleeve 170 to elastically deform.

One of the two flanges 172 of the support bushing 170 is provided between the step 186 of the threaded bushing 180 and the first adapter part 120. Between the first adapter part 120 and the structural part 80, the other of the two flanges of the bearing bush 170 is provided. Thus, the first adapter part 120 is also elastically supported in the transverse direction y relative to the second adapter part 140 and the structural part 80.

On the side of the first adapter part 120 facing away from the double fitting 100, the fitting 50 of the second backrest 30 is arranged close to the first backrest 20. The first fitting part 111 of the fitting 50 of the second backrest 30 is connected, preferably welded, to the first adapter part 120 with the interposition of a spacer 126. The second fitting part 112 of the fitting 50 is connected, preferably welded, to the structural member 32 of the second backrest 30. Spacer 126 may be omitted. The spacer 126 and the fitting 50 of the second backrest 30 fixed thereto are not essential components of the double fitting according to the invention.

The features disclosed in the foregoing description, in the claims and in the drawings may be essential for the implementation of the invention both individually and in combination with one another.

List of reference numerals

1 vehicle seat

11 first seat

12 second seat

13 third seat

20 first backrest

22 structural member

30 second backrest

32 structural member

40 third backrest

50 fittings

52 follower

54 internal tooth part

60 transfer rod

70 driving motor

80 structural parts (of seat part)

100 double fitting

111 first fitting part

112 second fitting part

120 first adapter part

122 fastening section

124 through hole

126 spacer

140 second adapter part

142 fastening section

144 through hole

160 adapter

170 elastic element, support bush

172 flange

174 abdomen part

180 thread bushing

182 internal thread

184 shoulder

190 screw

192 screw head

194 external thread

Axis A

x longitudinal direction

y transverse direction

z vertical direction.